Injection mold manufacturing can be roughly divided into following steps:

Before mold design, designer should fully analyze and study whether its plastic products conform to principle of injection molding processing. It needs to be carefully negotiated with your product designer to reach a consensus. This includes necessary discussion on geometric shape, dimensional accuracy and appearance requirements of product, try to avoid unnecessary complexity in injection mold manufacturing.

A set of high-quality molds requires not only good processing equipment and skilled mold manufacturing workers, but also a very important factor is to have a good mold design, especially for complex molds, quality of mold design accounts for more than 80% of mold quality. An excellent mold design is: on the premise of meeting requirements of customers, processing cost is low, processing difficulty is small, and processing time is short.
To do this, we must not only fully digest customer's requirements, but also have an understanding of injection molding machine, mold structure, processing technology and mold factory's own processing capabilities. Therefore, to improve mold design level, following points should be achieved:

 

1. Understand every detail in each mold design and understand purpose of each part in mold.
2. When designing, refer to similar design before, and understand situation in its mold processing and product production, learn from experience and lessons.
3. Learn more about working process of injection molding machine to deepen relationship between mold and injection molding machine.
4. Visit factory to understand process of processed products, characteristics and limitations of each process.
5. Understand test results and mold changes of molds designed by yourself, and learn lessons.
6. In design, try to use mold structure that was more successful in the past.
7. Learn more about impact of mold water on products.
8. Study some special mold structures and understand latest mold technology.

In the selection of mold materials, in addition to considering accuracy and quality of product, it is necessary to give correct choice in combination with actual capabilities of mold factory's processing and heat treatment. In addition, in order to shorten manufacturing cycle, existing standard parts are used as much as possible.

In addition to giving the best structure and reasonable tolerances in design, precision of mold, part processing and mold assembly are crucial. Therefore, choice of processing accuracy and processing method occupies an absolutely dominant position in mold manufacturing.
Dimensional error of molded products is mainly composed of following parts:
1. Manufacturing error of mold is about 1/3
2. Error caused by mold wear is about 1/6
3. Error caused by uneven shrinkage of molded parts is about 1/3
4. Error caused by inconsistency between predetermined contraction and actual contraction is about 1/6
Total error = (1) + (2) + (3) + (4)
Therefore, in order to reduce manufacturing error of mold, machining accuracy should be improved first. With use of CNC machine tools, this problem has been well controlled. In addition, in order to prevent errors caused by wear and deformation of mold, when mold with high processing accuracy and large product output is required, key parts such as cavity and core should be quenched. In medium and large molds, in order to save materials, facilitate processing and heat treatment, mosaic design should be used as much as possible.
In order to solve error caused by uneven shrinkage of molded parts, inconsistency between predetermined shrinkage and actual shrinkage, 1/3 of product tolerance is generally selected during mold manufacturing, as manufacturing tolerance of mold, its purpose is to leave a large adjustment room for subsequent molding process solve errors caused by molding process.

A set of molds is only 70%~80% of entire manufacturing process from beginning of design to completion of assembly. For error caused by inconsistency between predetermined shrinkage and actual shrinkage, smoothness of demoulding, and cooling effect, especially influence of size, position, shape of gate on the accuracy and appearance of product, must be checked by trial mold. Therefore, trial mold is an indispensable step to check whether mold is qualified and select the best molding process.

 

Gud Mould Industry Co., Ltd. is a professional manufacturer of plastic injection molding and die casting mould. Founded in 2007, Gud Mould Industry Co., Ltd. covers an area of 7000 square meters and has more than 100 experienced staffs, of which more than 30 with 10 years of experience in plastic engineering and die-casting.
To meet customers' higher requirements for product quality and greater demand for mould manufacturing, we constantly introduce advanced equipment, technology and talents at home and abroad to enhance our production means and technical support, constantly expand processing area to increase our production capacity. At present, Gud Mould has a large number of international advanced CNC machining centers, EDM, WEDM, milling machines, tool grinders and other precision die and mould processing equipment; imported spectrometers, metallographic analyzers, water capacity detectors, coordinate detectors, gauges and other international advanced detection equipment and instruments. 
Gud Mould's die design and production all realize computerization, apply International advanced AutoCAD, Pro/E, UG, Cimatron, MASTERCAM, etc. File of IGS, DXF, STP, PORASLD and so on are acceptable here. After receiving drawings and data from customers, engineers of Gud Mould design and program first. Manufacture, produce and inspect them strictly according to drawings of mould engineering. All manufacturing processes realize digitalization of drawings, so as to ensure stability of high precision and high quality of moulds. All materials of mould are made of high quality steel and precision standard mould base, which ensures service performance and life of mould. In line with principle of customer first, we provide the best quality, delivery date, quality service and reasonable price, absolutely guarantee interests of customers, and provide confidentiality commitment to all technical information of customers.
Gud Mould Industry Co., Ltd. has always adhered to business philosophy of "people-oriented, quality first", and has been making progress and developing steadily. Although Gud Mould is medium-sized, it has been recognized by well-known domestic enterprises such as Chang'an, Changfei, Hafei, Lifan, Ford in China, and has established a good reputation among domestic customers. In 2018, we set up overseas department, which mainly develops overseas markets.
We sincerely welcome you to visit our company and expand your business!