Injection moulds maker

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

For a leading injection mold manufacturer, mold making is a complex process that integrates precision design, precision machining, rigorous inspection, and continuous optimization. We're not just "making" a mold; we're creating a precision tool that efficiently and consistently produces high-quality plastic products.

Phase 1: Precision Design and Planning

This is the "birth" stage of the mold, and leading manufacturers invest significant effort here, as good design is half the battle.

Product Design and Evaluation (DFM): They don't just start drawing mold drawings; instead, they conduct a thorough evaluation of the client's plastic product design. They examine the product's structural rationality, dimensional accuracy, adequate draft angles, uniform wall thickness, and potential shrinkage compensation. They then provide optimization recommendations to ensure the product design is suitable for injection molding and prevent future defects.

Mold Design (CAD) and Mold Flow Analysis (CAE): These are the core steps. Designers use CAD software (such as UG and CATIA) to create a full 3D mold design, carefully considering the following:

Parting Line: This determines how the mold opens to remove the part, choosing a location that minimizes appearance and facilitates demolding.

Gating System: This includes the main runner, branch runners, and gate. The design must ensure that the plastic melt fills the mold cavity evenly, smoothly, and quickly. Excellent manufacturers prioritize optimal runner cross-section and length to minimize plastic loss and cooling time while ensuring quality.

Cooling System: This serves as the mold's "air conditioning system." The layout of cooling channels directly impacts production efficiency and product quality. Excellent design requires sufficient and unobstructed cooling to ensure uniform mold temperature, shortening molding cycle time and minimizing product deformation.

Ejection System: This determines how the part is ejected from the mold smoothly after cooling. Ejector pins and ejector blocks are strategically positioned, ensuring consistent barb orientation and easy removal from the part, ensuring smooth, unobstructed ejection without damage.

Venting: A channel for air to escape from the mold cavity. Venting grooves are created on the parting surface or at appropriate locations. Their depth must be less than the plastic overflow to prevent trapped air, which can lead to burning or underfill.

Moldflow Analysis: This is the key difference between excellent and mediocre manufacturers. Moldflow Analysis simulates the filling, holding, and cooling processes of the plastic melt within the mold cavity on a computer, predicting potential defects such as weld marks, air pockets, and shrinkage depressions, and optimizing the design before actual processing.

Material Science and Heat Treatment: Select appropriate mold steel (such as P20, H13, or 420SS) based on product requirements (such as production volume, plastic type, and required transparency) and cost budget. For molded parts (such as cores, cavities, and gating systems), material properties must be higher than 40Cr. Appropriate heat treatment (such as quenching and tempering) is performed to increase mold hardness (usually no less than 50HRC) and wear resistance, ensuring mold life.

Phase Two: Precision Machining and Manufacturing

Transforming design drawings into physical objects relies heavily on high-precision machining equipment and processes.

CAM Programming and CNC Machining (CNC): Mold designers or programming engineers convert 3D models into toolpaths that can be interpreted by CNC machines. High-precision CNC machines (milling machines, lathes, and drilling machines) perform rough and finish machining, shaping the mold's basic shape and cavity. Manufacturers striving for extreme precision have stringent requirements for CNC machining, such as tool-spindle concentricity ≤ 0.002mm and flatness of the milling cutter bottom surface ≤ 0.005mm.

Electrodischarge Machining (EDM): EDM is used for deep grooves, narrow gaps, complex curves, or sharp corners that are difficult to machine with CNC. Electrodischarge machining removes metal using discharges from electrodes, achieving extremely high precision. All electrodes use a unified reference, and the actual spark position is compensated based on the machine model's actual parameters.

Wire EDM (Wire Cutting Machining): Primarily used for machining precision holes (such as ejector pin holes and insert pin holes), irregularly shaped through-holes, and sharp corners. Wire EDM offers exceptional precision. Machine accuracy is inspected and calibrated before finishing, using current to compensate for errors.

Precision Grinding: Grinding is performed to ensure parallelism and flatness of the mold plates and precisely control the mold closing height. Accuracy requirements can reach ≤ 0.01mm, and specific finish standards are established for different grinding wheel models.

Phase Three: Meticulous Assembly & Debugging

This is more than just "assembly"; it embodies the spirit of craftsmanship.

Meticulous Assembly: Master moldsmiths meticulously assemble all pre-machined mold components (mold base, cavity, core, ejector pin, slide, etc.) according to the design drawings. They check that the contact, insertion, and parting surfaces are properly milled, that the inserts are securely positioned, and that sliding components (such as slides and lifters) operate smoothly. Oil grooves are also installed.

Cooling and Hydraulic System Testing: During or after assembly, the connected cooling water lines are leak-tested (typically requiring no leakage at 0.5 MPa) to ensure smooth flow. For molds with hydraulic core pulls, the oil lines are checked for unobstructed flow.

Phase 4: Trial & Validation

The mold undergoes its first "live-test" to verify its ability to produce qualified products.

Trial Run and Parameter Optimization: The assembled mold is installed on the designated injection molding machine and a test shot is performed using the designated plastic. Mold engineers systematically adjust injection molding parameters (temperature, pressure, speed, cooling time, etc.) to identify the optimal process window and produce preliminary molded samples.

Precision Inspection and Acceptance: Samples from the trial mold undergo a comprehensive inspection:

Appearance: Check for defects such as missing material, burning, white top, peaking, bubbles, and shrinkage.

Dimensions: Using precision equipment such as coordinate measuring machines (CMMs) and 2D imagers, we inspect key product dimensions to ensure they are within the tolerances specified in the drawings (for example, shaft dimensions have negative tolerances, while hole dimensions have positive tolerances).

Function and Fit: If the product requires assembly, we conduct actual assembly testing to check for misalignment within 0.1mm and any scratching issues.

Based on the mold trial results and sample measurement data, we may fine-tune the mold, polish it (to reduce mold size), adjust the venting grooves, optimize the gate size, and perform other adjustments until we produce a product that fully meets the requirements.

Throughout: Quality Control and Project Management

Total Quality Management System: Excellent manufacturers typically hold certifications such as ISO9001. They strictly adhere to standards and specifications for design, processing, testing, and assembly, ensuring that every step is documented and traceable.

Project Schedule and Communication Management: They effectively manage project schedules (mold production time is typically 15-20 days, longer for complex molds) and maintain close communication with customers, especially during critical stages such as design confirmation and mold trial evaluation.

Injection molding is a highly automated, cyclical, precision manufacturing process. It starts with plastic granules and masterbatch, and through the core cycle of mold closing → injection → pressure holding → cooling → mold opening → ejection, it efficiently produces plastic parts with stable dimensions and consistent appearance. After simple post-processing, it finally becomes the plastic product we want.

We are a quality mold manufacturer, and we can meet all your needs.

We are a excellent injection moulds maker, providing high-quality plastic part manufacturing. As long as you want to customize/develop plastic 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.