Plastic custom injection parts moulding

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 plastic custom injection parts moulding 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 plastic custom injection parts moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

The key points of custom plastic injection molded parts are a systematic project, involving multiple links such as design, materials, molds, processes and supply chains. The following are the eight core points that need to be focused on to ensure the success of the project.

I. Preliminary Communication and Clarification of Requirements (The most crucial step

This is the foundation of all work and must be clearly confirmed with the supplier/designer:

Part function: What is the core application? What force needs to be endured? Is it necessary to be wear-resistant, insulating and resistant to chemical corrosion?

Operating environment: Temperature range (softening at high temperatures and becoming brittle at low temperatures), humidity, whether exposed to ultraviolet rays, chemicals, etc.

Assembly requirements: How to connect with other parts (clips, screws, welding, bonding)? Tolerance requirements (tight fit or loose fit)?

Appearance requirements: Color (Pantone color number), surface treatment (smooth, textured, painted, silk-screen), whether there is a visible mold closing line or gate requirement.

Regulations and certifications: Whether it is necessary to comply with standards such as food grade (such as FDA), medical (such as USP Class VI), flame retardant (such as UL94), RoHS, etc.

Budget and quantity: Estimated order volume (mold cost allocation) and target unit price.

Ii. Material Selection

Based on the above requirements, select the appropriate plastic, mainly considering:

General-purpose plastics: PP, PE, ABS, PS, PVC - low cost, used for common structural components.

Engineering plastics: PA (nylon), PC, POM (acetal), PBT, PPO - high strength, heat resistance and wear resistance, used for load-bearing parts.

High-performance plastics: PEEK, PEI, PTFE - excellent heat resistance and chemical resistance, but expensive.

Key characteristic considerations: mechanical strength, toughness, rigidity, dimensional stability, shrinkage rate, and weather resistance.

Iii. Part Design Optimization (DFM - Design for Manufacturing)

This is the core that determines cost, quality and production feasibility. It must be reviewed in collaboration with the mold engineer.

Uniform wall thickness: Avoid local excessive thickness causing shrinkage and depression, or too thin thickness resulting in insufficient filling. The recommended range is usually 1.5 to 3.0mm.

Draft slope: The inner and outer walls must be designed with sufficient slope (usually 0.5°-3°) to facilitate the smooth ejection of the part from the mold.

Reinforcement rib design: The thickness of the ribs is recommended to be 50%-60% of the main body wall thickness to avoid shrinkage marks on the back. The root should be rounded.

Rounded corner transition: All sharp corners should be changed to rounded corners (R corners) to reduce stress concentration, improve plastic flow and increase strength.

Avoid lateral core-pulling: Minimize or redesign the features that require a lateral core-pulling mechanism (row position/slider) to simplify the mold and reduce costs.

Fastener and assembly design: Design the fasteners, columns and boss columns reasonably, and reserve the fit clearance.

Iv. Mold Design and Manufacturing

Molds are the largest upfront investment, determining the quality of parts and production efficiency.

The number of mold cavities: It is determined by the order volume. Single-cavity molds are cheaper, while multi-cavity molds are more efficient.

Selection of the parting line: The position should not affect the appearance and function, and it should be easy to clean the flash later.

Gate design: The type (side gate, point gate, hidden gate, sector gate) and position affect filling, appearance and removal difficulty.

Cooling system: A well-designed waterway can significantly shorten the cycle time, enhance production efficiency, and ensure the dimensional stability of parts.

Exhaust: Sufficient exhaust slots can prevent defects such as charring and insufficient filling caused by trapped air.

Ejection system: The position and method of the ejector pins should be reasonable to avoid white ejection or deformation.

Mold steel: Select based on the corrosiveness of the plastic, production volume and precision requirements, such as P20, 718, S136, NAK80, etc.

V. Injection Molding Process Debugging

A good mold needs to be matched with optimized process parameters.

Temperature: Barrel temperature, mold temperature.

Pressure: Injection pressure, holding pressure.

Speed: Injection speed.

Time: Injection time, holding pressure time, cooling time.

Process window: Seek a stable process parameter window to enable production to tolerate minor fluctuations and ensure stable quality.

Vi. Quality Assurance and Inspection

First article inspection: The first batch of parts must undergo comprehensive dimensional, appearance and functional tests, and a report (FAI) must be issued.

Inspection standards: Jointly confirm the "Product Inspection Standards" with the supplier to clearly define the boundaries between acceptable and unacceptable defects.

Critical dimension control: Define critical dimensions (CPK) and conduct regular spot checks using inspection tools or three-coordinate measuring machines.

Process control: Monitor the stability of process parameters and conduct periodic appearance and functional spot checks.

Document requirements: Request necessary quality documents, such as material certificates, factory inspection reports, etc.

Vii. Supply Chain and Project Management

Supplier selection: Evaluate its technical capabilities (mold design, problem-solving), equipment level, quality system and past cases.

Project schedule: Clearly define the time nodes for each stage (design confirmation -> mold making -> mold testing -> mass production).

Intellectual property rights: Clarify the ownership of the mold (whether it is the buyer or the supplier).

Mold maintenance: Define the responsibilities and procedures for mold maintenance and repair.

Viii. Key Points of Cost Control

Design simplification: DFM is the most effective means to reduce costs.

Material optimization: Under the premise of not affecting performance, select the material with the highest cost performance and take into account the proportion of recycled materials.

Mold simplification: Reduce side core-pulling, complex mechanisms, and use standard mold bases.

Output and cycle: By optimizing design and process, the cycle time of individual parts is shortened.

We are a plastic custom injection parts moulding manufacturer, providing high-quality plastic custom injection parts moulding manufacturing. As long as you want to customize/develop plastic custom injection parts moulding 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.