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

The injection molding process of custom plastic parts is a systematic project, which is far more than just "melting the plastic and injecting it into the mold". A professional and complete process is the key to ensuring that the final parts achieve the best balance in terms of quality, cost and delivery time.

As an outstanding manufacturer, what you provide to your customers is precisely this set of professional services that run through the entire process. The following is the complete and detailed professional process for the injection molding of custom plastic parts.

Phase One: Requirements Analysis and Design - The Cornerstone of Success

This is the starting point of the project and determines the direction of all subsequent work.

In-depth demand communication

Functional requirements: The usage environment, load, temperature resistance, chemical resistance, flame retardant grade (such as UL94), and expected service life of the parts.

Appearance requirements: Surface treatment (high gloss, matte, etched texture, spray), color, and whether there are aesthetic standards (A side).

Precision and regulations: Dimensional tolerances (in compliance with GD&T standards), assembly requirements, industry certifications (such as FDA for food contact and ISO 13485 for medical use).

Budget and cycle: Target cost, project schedule, expected output.

Product Design Optimization and DFM (Design for Manufacturability Analysis)

Core value link: The mold supplier works closely with the customer's design team.

Analysis content

Wall thickness analysis: Ensure uniform wall thickness (generally recommended to be 2-3mm) to avoid defects such as shrinkage and warping.

Draft Angle: Ensure that the part can be smoothly removed from the mold (usually at least 1°).

Reinforcing ribs and screw columns: Reasonably designed to prevent shrinkage marks on the back (rib thickness ≤ 60% of the main body wall thickness).

Rounded corner transition: Avoids stress concentration and improves plastic flow.

Determination of the parting line (P/L) : Select the position that has the least impact on functionality and appearance.

Gate position and type: Evaluate the optimal injection point, balance filling, and reduce weld marks.

Submit a professional DFM report, provide detailed design optimization suggestions, and confirm with the client.

Material selection recommendation

Recommend the most suitable resin based on product requirements. For example:

ABS: General-purpose, good strength, easy to spray.

PC: High strength, high heat resistance, transparent.

PP: Chemically resistant, good toughness, and low cost.

PA (Nylon) : Wear-resistant, high strength.

POM: High rigidity, low friction.

Confirm the material supplier and grade, and provide the material certification data.

Phase Two: Mold Design and Manufacturing - The Birth of Precision Tools

The mold is the "mother" of the product, and its quality directly determines the quality of the parts.

Mold design

Moldflow analysis: A standard feature of modern precision injection molding. By simulating the filling, cooling, shrinkage and warpage of plastics in molds through computers, problems such as cavitation, weld marks and shrinkage can be predicted and solved in advance. The gating system, cooling system and holding pressure strategy can be optimized, significantly reducing the cost and time of mold testing.

Structural design: Design the mold base, cavity/core, slider/inclined top (for handling upside-down), cooling water circuit, exhaust system, etc. Output detailed drawings.

Precision machining and assembly

Processing technology: Core components such as mold cores and inserts are processed using CNC (Numerical Control milling), EDM (Electrical Discharge Machining), wire cutting and other processes.

Surface treatment: Perform specified treatments on the cavity, such as mirror polishing (for transparent parts), VDI etching (such as leather grain), or fire patterns.

Mold assembly (Fitting) : All parts are precisely assembled and debugged by senior fitters to ensure that all moving components operate smoothly and without error.

Phase Three: Mold Testing and Process Optimization - Verification and Fine-tuning

This is the key bridge connecting the mold and mass production.

First mold trial (T0) : Install the mold on the injection molding machine, conduct initial debugging with production materials, and produce the first batch of samples.

Sample evaluation and debugging

Dimensional measurement: Use equipment such as a three-coordinate measuring machine (CMM) and a two-dimensional image measuring instrument to comprehensively inspect key dimensions and compare them with the design drawings.

Visual inspection: Check for defects such as material shortage, flash, shrinkage, air marks, silver streaks, and weld seams.

Functional testing: Conduct relevant tests such as assembly and strength.

Process optimization: Based on the sample issues, systematically adjust parameters such as injection speed, pressure, temperature, and time (often using the DOE experimental design method for efficient optimization).

Engineering confirmation and sample signing: Submit the improved samples to the customer for engineering verification (EVT) and obtain the customer's sample signing approval.

Process parameter locking: Record the final optimized parameters in the injection molding process condition table as the standard operation guidance for mass production.

Phase Four: Mass Production and Process Control - Ensuring Stability

Ensure that every mold of the product meets the standards.

Molding cycle: mold closing → injection → pressure holding → cooling → mold opening → ejection → part removal (automatically completed by the mechanical hand).

Statistical Process Control (SPC) :

Key process parameter monitoring: Real-time monitoring and recording of injection time, peak pressure, material temperature, etc., to ensure process stability.

First Article Inspection (FAI) : At the beginning of each shift or after mold change, a comprehensive inspection of the first product is conducted.

Regular spot checks: Conduct round-robin inspections of the appearance and key dimensions of the products.

Quality control chart: Use control charts to monitor the stability of key product dimensions, achieve predictive control, and detect abnormal trends in advance.

Phase Five: Quality Assurance and Delivery - The Final checkpoint

Final inspection and packaging

100% full appearance inspection or AOI (Automatic Optical Inspection) : Conduct a full appearance inspection of the product.

Protective packaging: Use PE bags, bubble bags, partitions, etc. for packaging to prevent scratches and contamination.

Outgoing Inspection (OQC) : Inspect the batches about to be shipped in accordance with the AQL sampling standard to ensure the quality of the entire batch.

Document delivery: Provide necessary quality documents along with the goods, such as Shipment Inspection Report (OQC Report), Material Certification (COC), Full-size Inspection Report (FAI Report), etc.

Mold maintenance and care: Regularly maintain the mold, prevent rust, and replace vulnerable parts to ensure its long-term stable operation.

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