mould maker plastic injection molding

In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized mould maker plastic injection molding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For mould maker plastic injection molding products, we can make corresponding plastic parts, which is mainly done through injection molds.

Injection molding is a plastic manufacturing process that injects molten plastic material into a mold and then cools and solidifies it.

1. Working principle

Filling the mold: Molten plastic material is injected into the mold through an injection machine, and the injection machine applies high pressure to make the plastic flow and fill the mold cavity.

Cooling and solidification: The plastic material in the mold is cooled to solidify and form. The cooling time and temperature depend on the type and thickness of the material, etc., and the mold design will also affect it.

Mold opening and removal: After cooling and solidification, the mold is opened and the molded part is taken out. There is a release agent on the mold to assist demolding.

Deburring, trimming and processing: After taking out the molded part, remove excess plastic material and burrs, and perform trimming and processing, which can be done manually or by machine.

Inspection and packaging: Finally, inspect the quality of the finished product, and package and transport it after passing the inspection.

2. Seven process flows

Mold preparation: Design, manufacture and install molds for manufacturing plastic products in advance. The design should consider the shape, size and material properties of the product, and the manufacturing should consider the mold material and processing accuracy.

Plastic material preparation: Select and process plastic materials according to product requirements, heat plastic particles or powder to a molten state and then inject them into the mold.

Injection: The molten plastic is injected into the mold through the injection machine. The pressure, speed and temperature of the injection machine must be controlled to ensure the injection accuracy and quality.

Cooling: After injection molding, wait for the plastic to fully cool and solidify.

Mold opening: After cooling, open the mold to take out the injection molded parts. The mold opening methods include manual, mechanical and hydraulic.

Deslagging, trimming and processing: After taking out the injection molded parts, deslagging, trimming and processing are carried out to remove excess materials, flatten the surface and process holes.

Inspection and packaging: After the finished product quality meets the requirements, it is packaged and transported.

Injection molding is the core technology of plastic product production. Its key points involve the fine coordination of multiple links such as materials, equipment, processes, molds and quality control. The following are the five core points and operation details of the system:

1. Material selection and pretreatment

Plastic property matching

Select the resin type (such as PP, ABS, PC) according to the product function (such as strength, transparency, temperature resistance), and consider parameters such as melt index (MFI), shrinkage (such as ABS shrinkage 0.5-0.7%), and thermal stability.

Case: Automotive parts require high-temperature resistant glass fiber reinforced nylon (PA+GF), while medical devices require medical grade PP or PC.

Key steps of pretreatment

Raw material drying: Hygroscopic materials (such as PC need to be dried at 120℃ for 4 hours) must strictly control water (water content <0.02%), otherwise it will cause bubbles/silver streaks.

Masterbatch mixing: The ratio error must be <±0.5% to avoid color difference or uneven dispersion.

2. Mold design and maintenance

Runner system optimization

Gate design: Point gate (diameter 0.8-1.5mm) is suitable for small parts, fan-shaped gate is used for thin-walled parts to reduce shear stress.

Cooling water channel layout: follow the principle of "conformal cooling", keep the distance from the cavity 10-15mm, and the temperature difference needs to be <5℃ to prevent warping.

Venting and demoulding

The depth of the venting groove is 0.02-0.04mm (less than the plastic overflow value) to avoid trapped air and burning.

Demolding slope design: ABS parts are recommended to be 1-1.5°, and deep cavity parts need to be increased to 2-3°.

3. Key points of injection molding equipment operation

Clamping system calibration

Clamping force (Tonnage) calculation: Projected area (cm²) × material pressure (generally 300-500kgf/cm²), and a 20% safety margin is required.

For example, the maximum production projected area of 2000T injection molding machine is about 4000cm² PP products.

Screw selection and maintenance

Screw L/D ratio ≥ 20:1, compression ratio 2-3 (PVC uses low shear screw, PC requires barrier screw).

Regularly check screw wear (gap > 0.2mm needs to be replaced) to avoid uneven plasticization.

mould maker plastic injection molding

We are a mould maker plastic injection molding manufacturer, providing high-quality mould maker plastic injection molding manufacturing. As long as you want to customize/develop mould maker plastic injection molding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.

Plastic Injection Mould making

Plastic molding specifications

Mold design:

Transaction process:

Mold testing:

Product packaging

Factory

We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.

We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.

Services we provide:

Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.

We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

FAQ

Q1: Are you trading company or manufacturer ?

A: We are manufacturers.

Q2. When can I get the quotation?

A: We usually quote within 2 days after we get your inquiry.

If you are very urgent, please call us or tell us in your email so that we can quote for you first.

Q3. How long is the lead-time for mold?

A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.

Q4. I have no 3D drawing, how should I start the new project?

A: You can supply us a molding sample, we will help you finish the 3D drawing design.

Q5. Before shipment, how to make sure the products quality?

A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.

We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.

Q6. What is your payment terms?

A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.

B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.

Q7: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.

2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.