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PC versus ABS-kunststof

PC versus ABS

PC VS ABS Plastic is a comparative guide with helpful info. It shows the suitability of each material for different uses. This guide lets you get the information you might need to improve your business strategies.

Plastic is handy, but it also poses environmental issues. However, if you are aware, you can reduce these risks and create a better world.

The first synthetic plastic was discovered in 1907. Since then, people have used plastics instead of metals or wood. Plastics are everywhere, from household items to car parts. We need plastics in electronics items, packaging, and even consumable items. So, you have many product options to create for your customers. However, the issue is choosing the suitable plastic material for them. ABS and PC are two popular plastics used in our modern world.

kunststof spuitgietmateriaal

What is ABS Polycarbonate?

ABS and Polycarbonate, or PC, are two different plastics. They can be combined or used as separate materials but are most commonly found in individual forms.

When you compare these materials (ABS VS PC), you must thoroughly know their properties. Also, you must know how to use them in various products. Once you have ideas for all these, you can choose the best option for your project. If you still have questions, feel free to Neem contact met ons op.

What is PC Plastic?

PC stands for Polycarbonate. People mainly like PC plastics because they are impact-resistant and easy to mold. It’s a type of thermoplastic.

PC plastic was first discovered in 1953, and now, it is one of the most used plastic materials in the industry. Most of the industries prefer PC plastic over ABS plastic.

Polycarbonate has a combination of BPA and phosgene. The process of making PC plastic is known as condensation polymerization.

In the factory, an operator first prepares raw materials. Then, he mixes the BPA in a solvent. During the mixing, the machine introduces the phosgene gas into the mixture. The process is fully automated, so the amount required for the reaction remains stable. Finally, this process will end by creating the polycarbonate resin.

Next, the operator melts the polycarbonate resin and puts it in an extruder. The machine then produces long strands of PC profiles through the extrusion process. The operator cools the strands and cuts them into small pallets. These pallets are the raw PC plastics you need to create various PC-spuitgieten plastic products.

Properties of PC Plastics

The combination of BPA and phosgene improves the behavior of PC plastic. Because of this, polycarbonate pallets are trendy for many plastic products.

(1)  The most important benefit that we can get from PC plastic is its toughness. It is almost unbreakable. It can smoothly work in temperatures between -20°C and 140°C.

(2) PC plastic has high impact strength. Note that its density is between 1.2 and 1.22. Because of this, this polymer can resist high impact and fracture. For safety and comfort, PC plastic is an excellent choice.

(3) PC plastic is transparent. According to various scientists, it can transmit light more than 90% of the time. Various manufacturers customize this transparency based on customer needs.

(4) PC plastic is exceptionally lightweight, not lighter than ABS. It typically weighs only 1.19 grams per cubic centimeter. Since it offers excellent transparency, you can use it to create many OEM products, saving significant costs.

(5) PC plastic is entirely UV resistant. This means it can block ultraviolet radiation up to 100%.

(6) This thermoplastic is also chemically resistant. It is excellent against many hydrocarbons, alcohols, and mild acids. However, it shows fair resistance to petroleum. Also, for alkalis and HH, PC plastic breaks easily.

(7) Finally, PC plastic works great under high heat. It remains 100% stable even at 135°C. if you wan to know more high heat materials, please go to high temperature plastic material pagina voor meer informatie.

Business Opportunities of PC Plastics

Because of the above seven benefits, PC plastics are prevalent in various applications. There are great opportunities for businesses to enter this vast market.

PC plastic is better than other plastic materials in many ways. It is resistant to impact and high heat. It also offers transparency up to 94%. Due to these benefits, PC plastic is in high demand in the plastic products market.

The following table showcases the trendy PC plastic products in the niche market. You can also get a similar product made of different alternative materials. Alternative materials might be cheap for specific parts. Therefore, knowing the properties of the materials for plastic parts is crucial when choosing them.

Category Popular Products/Opportunities Alternative Materials
Electronic Devices Power system parts, telecom hardware, high-stable capacitors ABS, PET, and PVC
Building Materials Dome lights, glazing, roofing sheets, and sound walls Glass, acrylic, and PVC
3D-printen Prototypes, OEM parts, plastic tools PLA, ABS, and Nylon
Data Storage Kits Discs, signage sheets, or films ABS, Acrylic, and PET
Vehicle Parts Headlamp lenses, bezels, reflectors, and bullet-proof window glass Glass, Acrylic, and ABS
Aerospace & Military Cockpit canopies, riot shields, safety goggles Glass, Acrylic
Optical Devices Eyewear lenses, camera lenses, sunglass lenses Glass, Acrylic
Mobile Devices Smartphone cases, coves, screen protectors Glass, Metal, ABS
Medical tools Sterilize equipment, biocompatible materials ABS, PEEK, SS
Niche Use Luggage, MP3 player cases, toys, hobby parts, UV-resistant outdoor items ABS, Nylon, and metal

PC versus ABS

What is ABS Plastic?

ABS stands for Acrylonitrile Butadiene Styrene. People prefer ABS plastic due to its durability, impact resistance, and ease of molding. It is also a type of thermoplastic.

ABS Plastic was first discovered in 1948 before PC plastic. It is mainly prevalent due to its cost-effectiveness and ease of manufacture.

ABS plastic comprises three raw materials: Acrylonitrile, Butadiene, and Styrene. In the factory, an operator prepares these monomers and then moves them to the polymerization chamber.

In the polymerization chamber, the operator mixes the monomers in water with surfactants. This mixing gradually creates tiny droplets. Finally, the reactor produces ABS copolymer.

Later, he mixes the monomers in the reactor again, but he won’t add water this time. This process is fully controlled so the operator can ensure a uniform distribution of the monomers. The result of this process is molten ABS.

After cooling the molten ABS, the operator cuts it into pallets. The plastic product factory mainly uses these pallets to shape them into various ABS products. Go to ABS-spuitgieten page and is ABS-kunststof veilig pagina voor meer informatie over ABS.

Properties of ABS Plastic

The polymer chain of ABS plastic offers many unique benefits. Although ABS is not superior to PC, it is still trendy in the plastic market due to its cost-effective nature and ease of processing.

(1) ABS plastic is also excellent for impact resistance. It can absorb any physical shock.

(2) ABS plastic is strong and long-lasting. Its hardness ranges from  68 to 118. Also, its tensile strength ranges from 22.1 – 74.0 MPa, a significant amount.

(3) This plastic material can remain stable under fair loads. For high loads, it may not be as suitable as PC plastic. However, ABS plastic is still prevalent in many structural applications.

(4) ABS plastic can typically withstand temperatures from -20 to 80 degrees Celsius (-20 to 176 F). However, you can improve its heat resistance ability during molding.

(5) ABS plastic is resistant to mild acids, alkalis, and oils. Unlike PC plastic, it can withstand alkalis and oils. However, it swallows when it comes in contact with some other chemicals. Glacial acetic acid, carbon tetrachloride, and aromatic HC easily break ABS plastic.

(6) ABS plastic is highly flammable at high temperatures. It has a fire resistance of up to 31%. However, heating it above the range may produce hot flames. However, it is good that it doesn’t make any pollutants.

(7) You can 100% recycle ABS plastic. Various factories or small workshops accept old ABS to create toys, appliances, or casings.

Business Opportunities of ABS Plastic

ABS plastic is also in high demand in the plastic market. It is durable and cost-effective. You can use it to create various gadgets, car parts, and household items.

According to Grand View Research, the ABS market will grow at a CAGR rate of 4.6% from 2022 to 2030. So, investing in ABS plastic is undoubtedly profitable. All you need is to know the proper way of investing.

The following table showcases the most popular ABS plastic products in the market. This table can give you some ideas on various ABS products and show the alternative materials used. Note that alternative materials may be cheaper and have lower standards.

Category Popular Products/Opportunities Alternative Materials
Gardening Tools Mini shovels, plastic rakes, plastic hoes, plastic claws, and hand equipment PP, PE, metal
Speelgoed Varieties of plastic toys, colorful toys PE, PVC
Musical Instruments Recorders, harmonicas, flutes, bugles, drums and rhythms Wood, metal, PC
Electronic Devices PC keyboards, enclosures for various gadgets, printer parts, phone case PC, PP
Car Parts Car dashboard components, door liners, pillar trim, panels for various equipment, mirror housings, seat backs, and belts PP, PC plastic
Medische hulpmiddelen Nebulizers, disposable syringes, housings for various medical equipment PC, PE
Huishoudelijke artikelen Vacuum cleaners, kitchen items, coffee makers, toasters, and more PC, stainless steel
Pipes and fittings Tools for liquid and gas delivery systems, outdoor and underground use Metal, PVC, PE
3D-printen OEM parts, additive manufacturing, molds PLA, Nylon, PC

Hoogtemperatuur kunststof materiaal

Acrylonitrile Butadiene Styrene vs Polycarbonate (ABS VS PC): What’s the Difference?

The above two sections explain what ABS and Polycarbonate are. You have already learned about their making process, popular products, and properties. Now the question is, which one is better? ABS or Polycarbonate? Suddenly, you can not make the decision. However, you will need some comparison to get the best option from PC VS ABS.

First, thoroughly research your project needs. What specific application will the plastic part be used for? Does it need high-impact resistance? Is transparency necessary? You can also determine parameters like mechanical stress, temperature, and moisture.

Second, consider the environment in which your plastic part will be used. Is there any exposure to UV radiation? Does the material need to be fire-resistant? Is there any chemical or solvent exposure?

Third, consider the cost of your whole project. In this case, you should balance the price with the product’s overall performance. You can use cheaper plastics, but the material properties must meet the project’s needs.

For example, your project may involve both impact resistance and temperature. You might be making a mistake if you choose ABS instead of PC. ABS’s max temperature rating is only 80, while PC plastic offers up to 140. So, for the temperature-involved job, PC plastic is suitable. Always take safety factors into account.

After thoroughly researching the project needs, compare the materials (ABS VS PC) and choose the best option. Here, we will use six primary factors to compare these two plastics.

PC VS ABS Plastic: Material Properties

When you compare both plastics (PC VS ABS), the material properties come first. Both plastics have unique advantages and limitations.

When you think of strength, PC offers more impact resistance. The values are in the table below. As you can see, PC has more density and less elongation to break. This means the PC is more rigid and suitable for heavy-duty applications.

Moreover, PC plastic offers high-temperature resistance. It remains stable and does not deform even in high heat. PC also prevents water absorption and has excellent transparency. You can use this transparency feature to create a wide range of plastic products, like lenses, phone screens, and more.

On the other hand, ABS is one step ahead of PC plastic in terms of UV resistance and electric insulation. It also has an excellent capability, up to 31% of flame retardancy. For other materials, ABS shows average standards.

 PC VS ABS Plastic: Material Properties Summary Table

Eigendom Polycarbonaat (PC) Acrylonitril-butadieen-styreen (ABS)
Dikte 1.25 g/cm3 1.01 to 1.20 g/cm3
Hardheid 114 – 124 Rockwell R 68 to 118 Rockwell R
Treksterkte 28.0 – 75.0 MPa 22.1 – 74.0 MPa
Impact Strength 10 – 90 Kj/m² 8.00 – 48.0 kJ/m²
Elongation to break 6.10% to 138% 3.00 – 150 %
Temperatuurclassificatie −40 °C to 130 °C (−40 °F to –266 °F) (-20° C to 80° C (-20° F to 176° F)
Smeltpunt 220 – 320 °C 180 – 240 °C
Transparantie 0.000 – 94.0 % 0.000 – 91.0 %
UV-bestendigheid Excellent, but you must add a UV stabilizer Uitstekend
Chemische bestendigheid Excellent, except for alkalis and HH Excellent, except for Glacial acetic acid, carbon tetrachloride, and aromatic HC
Electric Insulation 1000 to 1017 ohm-cm 109 to 1017 ohm-cm
Fire resistance 25% ( can add fire resistant element) 0.5% to 31.2% ( can add fire resistant element)
Water absorption 0.0200 – 0.350 % 0.0500 – 1.00 %
Weather resistance Good with UV stabilizers Poor; more prone to degradation without protection
Oppervlakteafwerking Glossy and Smooth Matte, slightly rougher texture

Spuitgiet service

PC VS ABS Plastic: Ways of Processing

There are various ways of processing plastics. Some standard processing techniques are injection kunststof mal, extrusion, thermoforming, blow molding, and machining.

ABS plastic is easy to process because it has a low melting point. In injection molding, the process temperature for ABS is 210 to 260 degrees Celsius. On the other hand, the process temperature for PC plastic is 260 to 320 degrees Celsius.

ABS is also easy to process in extrusion. Since it has a lower viscosity, you can create smooth plastic profiles. On the other hand, PC plastic is more rigid, and your extruder will need more pressure to make the profiles.

When you compare them (PC VS ABS), the ease of processing only matters regarding production cost. However, if you consider the product’s outcome, PC plastic will give you the best service.

PC-spuitgieten

PC VS ABS Plastic: Filament for 3D Printing

3D printing is trendy in our modern world. You can create 3D objects with a 3D printer. The working principle is the same as the typical printer but on a 3D surface. The printer typically builds the object layer by layer. Various types of materials are used to do this. ABS and polycarbonate plastics are two popular ones.

Each plays a crucial role in 3D printing, comparing both (PC VS ABS) plastics. Each type has its unique benefits and limitations.

ABS filament is typically a durable and flexible plastic. It is mainly used for its strength and impact resistance, making it ideal for various functional parts and household items. ABS filament is easy to print and a cost-effective method. However, it produces fumes that may make you feel uncomfortable. Besides, it may warp if you don’t print on a heated bed.

On the other hand, PC plastic is also strong, transparent, and highly temperature-resistant. These two benefits can be used to create a wide range of 3D objects. However, what makes PC plastic less familiar is its high melting point. It is also more expensive than ABS plastic.

PC VS ABS Plastic: Recyclability

ABS and polycarbonate plastics are both recyclable, but their process may differ. For ABS plastic, people often use the shredding method, sometimes chemically. On the other hand, you can recycle PC plastic in two ways: shredding and melting.

Recycling polycarbonate is more complex than recycling ABS plastics. One reason for this is its composition.

PC VS ABS Plastic: Costs

The manufacturing cost of ABS plastic is lower than that of PC plastic. Also, the melting point of ABS is lower than that of PC plastic. Also, the viscosity of molten ABS is lower than PC. Combining all these properties, you will find that processing ABS plastic is also cost-effective.

You can decide on the right option based on just costs. However, you must also compare performance. PC plastic offers more performance quality than ABS plastic. It even comes with a smooth and glossy finish.

PC VS ABS Plastic: Applications

ABS plastic is widely used in car parts, consumer goods, and electric casings. It is strong and easy to process, so ABS plastic is preferred in these three industries.

Polycarbonate, on the other hand, is favored for safety equipment. Safety gear, optics discs, and medical gadgets are all popular items. You can check the respective tables described above for each item.

Make Your Decision: Which is Better?

When to choose ABS plastic?

If you need a cost-effective material, ABS is the best option. It’s ideal for products that don’t need high-temperature resistance. ABS is generally easy to process. Moreover, ABS plastics are lighter than PC plastic. Therefore, you can use this material to create toys and many weight-sensitive products, and lots of PC materials used in over schimmel of invoegen van mallen process as substrate.

When to choose PC plastic?

Polycarbonate thermoplastic gives you everything you need. It is strong, durable, and high-temperature resistant. Although it is not as cheap as ABS plastic, PC products are stable for a long time. A PC plastic is the right choice if your project demands improved performance and toughness.

You can also create a hybrid version, combining ABS and PC. ABS/PC typically combines the properties of both ABS and PC.

Compared to PC (PC VS PC/ABS ), PC/ABS provides better impact resistance and lower shrinkage. Unlike PC, PC/ABS is easy to process. On the other hand, compared to ABS (ABS/PC VS ABS), ABS/PC provides more heat resistance.

The choice mainly depends on your specific use, budget, and requirements. Therefore, always assess your target before choosing the right material. It not only saves your time but also your valuable investment.

Veelgestelde vragen

Is PC lighter than ABS?

No, ABS is typically lighter than PC or Polycarbonate. Its density generally starts at 1 gram per cubic centimeter, while PC is up to 1.20. Therefore, ABS plastics are lighter than PC plastic. If weight is a critical factor in your project, ABS may be the better choice over a PC.

Is PC filament stronger than ABS?

Yes, the PC filament is stronger than ABS. The hardness level of PC plastic is 114 to 124 Rockwell. It also has higher impact resistance so that it can withstand greater force. Polycarbonate offers high heat resistance.

What is the ratio of ABS to PC?

The ratio of ABS to PC in a blend typically is 60:40. The custom ratio may also include 50:50 or 70:30. The ratio may differ based on specific project needs.

Which is better, ABS or PC or PP luggage?

PC or Polycarbonaat is typically the more robust plastic. This plastic is also durable, making it the most suitable material for luggage. However, people also use PP or polypropylene for luggage manufacturing. Note that PP also offers high strength and durability, if you want to know more plastic materials, you could go to how to choose the best plastic injection molding materials page to know more material selection tips.

Is PC-ABS expensive?

The PC/ABS is more expensive than the typical ABS. The combination of PC and ABS typically increases this price. Although the cost is higher, you can get added benefits.

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Polycarbonate Injection Molding

Polycarbonate Injection Molding

What is a Polycarbonate (PC) Injection Molding?

Polycarbonaat spuitgieten is an injection molding part made of PC (polycarbonate) material. It is a manufacturing process to produce products by inserting molten PC (polycarbonate) into a mold. Usually, the melt temperature for PC material is between 270 and 320 degrees Celsius. It may decompose at high temperatures and cause defects like bubbles, black spots, etc. Typically, the injection pressure is controlled between 80 and 120 MPa.

Polycarbonaat (PC) is an amorphous thermoplastic. These polymers allow the transmission of light, like glass. An important feature is that they can be heated to their melting point, cooled, and heated again without degrading themselves. As PC can liquify, you can undertake injection molding. They are resistant to heat and can be used with flame-retardant materials. The molding parts are made of polycarbonate, which we call polycarbonaat spuitgieten.

Polystyreen spuitgietproces

What is Polycarbonates or PC Material

Polycarbonaat is generally called PC. Because of its excellent mechanical properties, this is commonly known as bullet-proof plastic. PC injection molding has high mechanical strength, a wide temperature range, good electrical insulation properties (anti-arc performance is unchanged), good dimensional stability and transparency, etc.

It is widely used in electrical products, electric meter enclosures, and electronic product structural members. There are many modified products of PC, usually added with glass fiber, mineral fillers, chemical fire retardants, and other plastics. PC has poor fluidity, and it needs high temperatures when working on the PC-spuitgieten.

Polycarbonate Injection Molding

Uses of Polycarbonate (PC)

They are an absolute necessity when you need to impact resistance and transparency. There are other transparent-molded parts, which are acryl spuitgieten.
PC (polycarbonate) can be used across multiple industries. They are primarily used in different medical devices, digital compact disks, protective gear, eyewear, and much more.
It is finding use with security agencies for mob control and finds its way into materials for protective visors and riot shields.
PC (polycarbonate) finds use in your car. Being flexible and heat-resistant, PC (Polycarbonate) is located in the internal focal points: radiator flame broils, entryway handles, and front light bezels. Polycarbonate is also used in making nurseries and greenhouses. It is UV-resistant, allowing in the sun’s rays but not the UV rays.
Mold release agents should not be applied to polycarbonate molds during this activity. The application of recycled materials cannot be done more than three times, with the application quantity limited to around 20%. or no recycled material for the high-polish injection molding onderdelen.

Applications of Polycarbonate injection molding parts

There are many industries that use PC injection molding parts. Below are some of the most the most common industries that use PC injection molding parts:

  • Producing a variety of vehicle components, including dashboard panels, interior trim, and headlight lenses, is one of the main uses of PC injection molding. PCs are perfect for these applications because of their excellent impact tolerance.
  • Manufacturing a range of electronic components, such as housings for laptops, smartphones, and other electronic devices, is another significant usage for PC injection molding. Because PCs can shield delicate electronic components from heat and fire damage, their heat-resistant and flame-retardant qualities make them perfect for these applications.
  • Numerous medical equipment and devices are made using PC injection molding. Syringes, IV connectors, and surgical equipment are among the many items made from polycarbonate. PC is perfect for these applications because of its sterilizability and biocompatibility, which allow it to be utilized in medical settings without running the risk of infection.
  • Toys, sporting goods, and home appliances are just a few of the items produced in the consumer goods sector using PC injection molding. Because it is so easily molded into intricate shapes and designs, polycarbonate is a popular material choice for these kinds of applications due to its versatility and aesthetic appeal.

Benefits of Polycarbonate Injection Molding

The benefits arise from the type of material that is molded to give the end product. The benefits of polyurethane molding come from the characteristics of the polycarbonates that are used in the process.
Easy to make. PC is lightweight but durable, making installation so easy. You can even cut them with scissors if necessary.
Versatile. You can be creative with the structures. You can easily shape igloos out of it. Go ahead with those fancy shapes in your mind.
Resistant to impact. You are worried about the breakage. The material can resist rain, hail, and storms. It is resistant to flames and does not emit toxic gases when on fire.
Protects against harmful UV. They keep out the harmful radiation. They do not let the harmful rays into the glasshouses that are made of these materials.
Meager costs. These materials are easy to carry and handle. You do not have to bear high handling costs and labor.
high polishing injection molding

high polishing injection molding

Disadvantages of Polycarbonate injection molding.

Toxicity. They are known to release bisphenol A (BPA) during degradation. You need to make them BPA-free.
Chemical resistance. It is sensitive to chemicals. It deteriorates when exposed to organic solvents. They are very sensitive to abrasive cleaners, cleaning products, and solutions.
Durability. It is prone to absorbing odors and stress cracking.
Flow marks. If you are making high-polish plastic injection molding parts or transparent injection molding parts by using polycarbonate, the flow mark could be the number one important issue that you need to prevent in advance. As a professional plastic mold company and expert in this type of material, gate design and cooling design are the most important things to solve those issues.
Are you ready for your plastic injection molding project now? Send us an email. We are one of the best leveranciers van mallen in China, and we offer a wide range of plastic injection mold and molding services.

The Polycarbonate injection molding process

  1. Material processing

    Polycarbonate injection molding has high water absorption. So before injection molding, it must be preheated and dried. The pure polycarbonate is dried at 120 °C, and the modified PC should generally be dried for more than 4 hours at a temperature of 110 °C. The drying time should not exceed 10 hours. Generally, you can use the method of air extrusion to determine whether it’s dry enough. The utilization of recycled materials can reach 20%. In some cases, the utilization of recycled materials can be 100%; the actual quantity is subject to the quality requirements of the products. Recycled materials can’t mix different masterbatch simultaneously, or it will seriously damage the nature of the finished product.

    PC-spuitgieten

    PC-spuitgieten

  2. Selectie van een spuitgietmachine

    Now, for cost and other reasons, PC often uses modified materials, especially electrical products, which should increase fireproof performance. When the flame-retardant PC and other plastic alloy products are molded, it should make sure the plasticizing system of the injection molding machine mixes well and is corrosion-resistant. It is unachievable for the conventional plasticizing screw. So when choosing, you should state in advance that, usually, there are special PC screws for customers to choose from.

  3. Design of mold and gate for polycarbonate injection molding

    The common mold temperature is 80–100 °C, and the temperature of mold adding glass fiber is 100–130 °C. Small products can use the pinpoint gate; the gate depth should be 70% of the thickest part; and other gates are circular and rectangular. If the gate is bigger, it’s better, which can reduce the defects caused by excessive shear. The depth of the vent should be less than 0.03-0.06 mm; the runner should be short and round. The ejection gradient is generally about 30′-1.

  4. Melt temperature for Polycarbonate material

    You can use the gas injection method to determine the processing temperature. Generally, the polycarbonate injection molding processing temperature is 270–320 °C. The temperature of the PC with some modification or low molecular weight is 230–270 °C.

  5. Injectiesnelheid

    When molding, relatively fast injection speeds are usually adopted, such as for electrical switch parts. Commonly, it is from slow to rapid injection molding.

  6. Verpakking

    Packing is 10 bars around; it can be appropriately reduced without the gas lines and color mixing.

  7. Verblijftijd

    If the materials stay at high temperatures for a long time, they will degrade, emit CO2, and turn yellow. You should use PS to clean the cylinder, not LDPE, POM, ABS, or PA.

  8. Special notes

    Some modified PC injection molding material, as being recycled many times (the molecular weight decreased) or an uneven mix of ingredients, would easily produce the dark brown liquid bubble.

Produce high-quality polycarbonate injection molding parts that need a special injection barrel because polycarbonate has a high density. Nominal injection barrels make it hard to mold polycarbonate materials. If you are looking for high-quality polycarbonate injection molding parts, you need to look for a professional polycarbonate molding company to support you. You could contact us to make your PC molding parts.

kunststof mal

The key point to select injection molding machine for PC Plastic Injection molding parts

Clamping force:

The finished projected area per square centimeter is multiplied by 0.47 to 0.78 tons (or per square inch by 3 to 5 tons).
The size of the machine: A finished weight is approximately 40–60% of the capacity of the injection molding machine. If the machine puts polystyrene as the capacity (oz), which needs to be decreased by 10%, At the beginning, which is used as GUANG DA’s capacity, 1 ounce is 28.3 grams.

Screw: Screw length should be at least 15 diameters long; L/DD of 20:1 is the best. The compression ratio is preferably between 1.5:1 and 30:1. The stop valve in front of the screw should be set into a sliding ring. The flowing gap of resin should be at least 3.2 mm.

Nozzle: The tip opening should be at least 4.5 mm (diameter); if the weight of the finished product is over 5.5 kg, the diameter of the nozzle should be 9.5 mm or above. Besides, the tip opening should be less than 0.5–1 mm smaller than the gate diameter, and the segment road is shorter, which is better; it’s about 5 mm.

The key point on molding conditions for PC injection molding:

Melt temperature and mold temperature:

The best molding temperature setting is related to many factors, such as size presses, screw configuration, the mold and the molded article in the design, the molding cycle time, etc. In general, to make plastic gradually melt, you should set a lower temperature in the rear section of the feed tube or feeding area. And set a higher temperature in front of the feed tube. However, if the screw is designed defectively or the L/DD value is too small, you can also set the reverse temperature.

For the mold temperature, the high mold temperature may provide a better surface appearance, and the residual stress will be smaller. For the thinner or longer-finished PC plastic injection molding products, it’s easy to fill. However, low mold temperatures can shorten the molding cycle.

The speed of rotation of the screw is suggested at 40 to 70 rpm, but it’s subject to the design of the machine and screw.

Injection pressure: to fill the mold as soon as possible, the injection pressure should be bigger, which is better. Generally, it’s about 850 to 1,400 KG/CM2, up to 2,400 KG/CM2.

Packing: Generally, the lower, the better. For the sake of uniformity in feeding, it is suggested to use 3 to 14 KG/CM2.

The speed of injection molding: firing rate has a great relation with gate design; when using a direct gate or edge gate, in order to avoid the day sunshine phenomenon and the phenomenon of wave and current marks, you should use the slow firing rate. What’s more, if the thickness of finished products is above 5 mm, you can use slow injection to avoid air bubbles or recesses.

In general, the principle of firing rate is faster for the thin and slower for the thick. From injection to holding pressure, holding pressure is as low as possible to avoid molding products appearing to have residual stress. However, you can use the annealing method to remove or alleviate the residual stress. The condition is 120 to 130 degrees Celsius for approximately half to one hour.

PC plastic injection molding

PC plastic injection molding

Feed cylinder’s cleaning

1. Under the molding temperature of polycarbonate, add cleaning materials (general-purpose polystyrene or transparent benzene) and continuously inject for 20 to 30 times.
2. Put the machine back and continue the cleaning material by air injection until the injected cleaning materials begin to swell and blister.
3. Reset the temperature of the feed cylinder to 200 to 230 degrees Celsius.
4. Continue cleaning the material by air injection until the melt temperature of the cleaning material reaches 260 °C and the feed cylinder looks very clean and transparent on the surface.

Als u op zoek bent naar polycarbonaat spuitgieten or any other kunststof spuitgietmal for your project, feel free to contact us. We offer custom injection molding made in PC, PMMA, ABS, PA66, and many more. Send us an email to get a price for your custom molding project now.

Sincere Tech is een van de top 10 plastic injection molding companies in China. We offer a wide range of custom PC injection molding, die casting molds, metal parts, CNC machining, and mold components. Through ongoing investments in research and development, we deliver cutting-edge solutions that address the evolving needs of our customers. As one of the best spuitgietmatrijs Als leverancier van producten in China zijn wij trots op onze toewijding aan uitmuntendheid.

Quality is of the utmost importance to us. To make sure we make high-quality kunststof mallen, we will use a CMM measuring machine to measure all mold components, electrodes, and final molding parts. To make sure all dimensions are within tolerance, we will test the function of parts and materials to make sure that the final part will meet your requirements.

If you are looking for a China mold maker for PC injection molding or any custom molds, Sincere Tech is one of your best options. You can expect the highest level of professionalism, expertise, and innovation. With our experienced team, we are dedicated to helping you bring your ideas to life, delivering superior products that excel in performance, durability, and cost-effectiveness.

Our expanded capabilities include, but are not limited to, the following services:

  1. Rapid Prototyping: We offer rapid prototyping services (3D printing or CNC machining prototypes) to quickly transform your rough design into usable prototypes, testing, redesign suggestions, etc.
  2. Precision CNC machining: Our advanced CNC machines enable us to create high-quality mold components with tight tolerances, which will currently ensure tolerance and precision in the injection-molded products.
  3. Overgieten: We make overmolding for some handle tools; some of the overmolding process is used in die casting molds as well. Contact us for a quote on your overmolding project.
  4. Inzetstuk voor mallen:Insert molding lijkt op overmolding, maar is toch iets anders. Bij insert molding worden normaal gesproken metalen onderdelen als substraat gebruikt, terwijl bij overmolding kunststof onderdelen als substraat worden gebruikt.
  5. Twee-schots-gieten: With two-shot molding, we can produce complex, multi-material components in a single operation, reducing assembly requirements and enhancing design possibilities. Two-shot molding is more complex than insert molding or overmolding, and two-shot molding requires a two-shot injection molding machine.
  6. Value-Added Services: In addition to injection molding, die casting, and machining, we offer a range of value-added services, including product silkscreening, painting, assembly, testing, certificates, packaging, and logistics support, streamlining your supply chain and reducing costs.

Partner with Sincere Tech China Mold Maker for your PC-spuitgieten, die casting, and machining needs. We will offer you the best quality and a fast lead time. Contact us for a quote in 24 hours.

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