Contact Us
PC Injection Molding

PC Injection Molding

PC Plastic Material Characteristics

PC is short name for polycarbonate plastic resin, it is a polymer with carbonate group in the molecular chain.

Polycarbonate is colorless and transparent, with good mechanical properties, good dimensional stability, heat resistance, impact resistance, non-toxic, and excellent dielectric properties.

PC shrinkage: 0.5-0.7%.

PC density: 1.18~1.22g/cm3.

Drying temperature of PC material: 100~120°C for polycarbonate injection molding material.

Dry time: 3~4 hours, with sufficient drying temperature and time, the processed products will be good quality.

PC injection molding temperature: the processing barrel temperature is set between 260 and 300, and the processing temperature parameters are adjusted according to the injection molding model (divided into one, two, three or four sections); For the nozzle temperature about 10 lower than the last section.

Mold temperature: between 80 and 120, it is suggested that the higher the melt index of the material, the lower the mold temperature, so as to control the size and better maintain the original physical properties of the raw material.


Which products are used for PC injection molding

PC injection molded parts have a wide range of applications in our life. A lot of plastic housings are produced with PC in HanKing Mould, such as lampshade, electronic switch housing, module cover, battery case, socket panel, camera parts, lens, medical dental parts.



Which-products-are-used-for-PC-injection-molding.jpg 


PC Plastic Parts Mould Design

Before making mold for PC products, we need to study the structure of PC plastic parts, and mold-flow analysis is also needed for those with complex structure.

PC plastic parts with simple structure can complete the preliminary design work in a short time, while products with complex structure may need to be discussed for more time, we will work out the best mold design solution until our customer are satisfied.

 

PC material: Generally, most of PC are modified materials, select corresponding materials according to product functions and characteristics.


Shrinkage: The shrinkage of PC plastic parts varies according to the structure and size of the product. Recommend range in the material data sheet is normally 0.5-0.7%, while we normally take the median value 0.6%.

 

Mold Cavity: The number of cavities in the mold has a great impact on the plastic injection molding production cost. For low volume plastic products, single cavity mold is the best choice; while for large volume plastic parts, select multi-cavity molds within the size range of the injection molding machine as far as possible.

 

Mold Type: The type of injection mold determined by the product, some products structure need three plate molds, which can be divided into several points from one gate point, which is very useful for molding; Some simple structure parts will be made with two plate molds, which mainly depends on the product requirements.

 

Steel of Mold: It will depend on the plastic parts volume, we normally use P20 steel for small quantity products, and use other harden steel if customers have large volume plastic parts injection molding requirements.

 

Type of Runner: The cost of mold with hot runner is higher, while the production cost of cold runner is increased due to the need for more plastic, so the selection of runner needs to be determined according to customer requirements. In order to improve the production speed, some customers choose to use hot runner, and some customers use cold runner for the aim of saving mould cost. However, no matter whether customers choose cold runner or hot runner, HanKing Mould can guarantee the quality of the mold.

 

Type of Gate: The gate type depends on the mold type and plastic product structure. The principle is easy to make part fall down and beautiful look.

 

Injection Molding Machine: Use an injection molding machine that meets the mold size, can help save unnecessary equipment costs and improve PC injection molding parts quality.

HanKing Mould owns 60 tons to 1600 tons of injection molding machines which can produce plastic injection parts from internal small parts to external plastic shells for your project.

 

PC parts thickness: The minimum wall thickness of PC plastic parts is 1mm, and the maximum thickness shall not exceed 8mm.

 

Draft Angle: The draft angle can help easy removal when the PC injection molding parts are demoulded. It is a design that allows the plastic products to be easily separated from the injection mold using the ejector pin after the molding is cooled. With a draft angle, as long as the bottom surface is pushed through the ejector pin, it will fall out easily.

Experience is a very important factor to determine the draft angle of a plastic piece, because different plastic parts shape, wall thickness and surface undercut will have more or less impact on the size of the draft angle.

The general rule is that the larger the draft angle is the easier the workpiece is demoulded, the lower the difficulty and cost of mold design, but this must be under the premise of the order allowed by the appearance design specification.

The standard demoulding angle is about 1 °~2 °.

Under certain dimensional accuracy requirements, sometimes 1/2 °~1/4 ° release angle will also be used.

 

HanKing Mould is a modern enterprise integrating the design and manufacture of plastic injection tooling, over-mold and two-color mould, as well as injection molding production. Main business: injection mold design, mould making processing and manufacturing, plastic injection molding service, painting, printing, assembly, etc. Contact to send your RFQ, we can quote in 24 hours.


The Latest Plastic Injection Molding Articles
  • Failure Analysis of Plastic Injection Tooling

    Failure Analysis of Plastic Injection Tooling

    March 24, 20221. The ejector pin of the plastic injection tooling is bent, broken or leakedThe quality of the self-made ejector is better, but the processing cost is too high. Now, standard parts are usually used, ...view
  • Composition of Automobile Plastic Injection Tooling

    Composition of Automobile Plastic Injection Tooling

    May 25, 2022It has basically become a common product in our real life. In the process of actual use, this product will bring us better use guarantee. At present, most people want to know about what the structural...view
  • TPE Material Key Point in Injection Molding Process

    TPE Material Key Point in Injection Molding Process

    October 19, 2021TPE material, also known as thermoplastic elastomer, is a polymer material that has both the characteristics of plastic and rubber, shows the high elasticity of rubber at room temperature, can be plas...view
  • Cost and Price of the Plastic Shell

    Cost and Price of the Plastic Shell

    December 15, 2020Plastic shell is very important in product development. Plastic shell is used in more and more equipment. How can we know the price of plastic shell?As for the cost of plastic shell, first, plastic ma...view
  • The Main Scope of Mold Modeling Services

    The Main Scope of Mold Modeling Services

    April 21, 2020Mold modeling service: It usually refers to the 3D modeling of the product, focusing on the use of software. The 3D modeling of the mold structure is more focused on the test of the 3D design software...view
  • How to Make Custom Plastic Parts

    How to Make Custom Plastic Parts

    February 13, 2023Custom plastic parts are an essential aspect of many industries and applications. The versatility of plastic materials makes it possible to produce an array of different shapes, sizes, and designs to ...view
Plastic Injection Moulds
Plastic Parts Gallery