What does the mold do?

Mold is a tool used to make blanks into parts with specific shapes and sizes in blanking, forming stamping, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, compression molding or injection molding of engineering plastics, rubber, ceramics and other products.

I. Production inspection

The control of mold raw materials is carried out from the following aspects:

1, macro test

Chemical composition is the decisive factor to ensure the performance of steel, but the qualified composition cannot fully explain the performance of steel. Because of the inhomogeneity of the internal structure and composition of steel, macroscopic inspection has supplemented this deficiency to a great extent.

Macroscopic examination can observe the crystallization of steel, the destruction of the continuity of steel and the heterogeneity of some components.

Standard macrostructure defect rating diagram of structural steel GB 1979

There are eight common macro defects: segregation, porosity, inclusion, shrinkage cavity, bubble, white spot, crack and folding.

2. 1, Evaluation of Annealing Structure

The purpose of annealing is to reduce the hardness of steel, facilitate processing and prepare for subsequent heat treatment.

The annealing structure of carbon tool steel is evaluated according to GB 1298 Grade I rating chart.

2.2, carbide inhomogeneity

The microstructure of Cr 12 ledeburite steel contains a large number of * * crystal carbides, and the inhomogeneity of carbides has a very important influence on the service performance, so the distribution of carbides must be strictly controlled.

In a word, the production objects of mold factories and workshops are more complicated, and they are all single pieces and small batches, which brings certain difficulties to the formulation and management of mold production quotas. In addition, the production methods, equipment and technical quality of each factory and workshop are different. Therefore, when making the quota, we must find out appropriate methods and formulate advanced and reasonable working hour quota according to the actual situation of our factory and workshop to improve labor productivity.

Second, the production process

A mold is a model, and the product is made according to this model, but how the mold is produced may not be answered by most mold professionals. Mould plays an irreplaceable role in our life. Most of our daily necessities are inseparable from mould, not to mention plastic products such as computers, telephones, fax machines, keyboards and cups. In addition, the covers of automobile and motorcycle engines are also made of molds, and there are various kinds of cars.

The following is a brief introduction to the modern mold production process.

1) ESI (early supplier participation): This stage is mainly about the technical discussion between customers and suppliers on product design and mold development. The main purpose is to let suppliers clearly understand the design intent and precision requirements of product designers, and at the same time let product designers better understand the mold production capacity and product process performance, so as to make more reasonable designs.

2) Quotation: including mold price, mold life, turnover process, tonnage required by the machine, and mold delivery date. A more detailed quotation should include information such as product size and weight, mold size and weight. )

3) Purchase orders: the issuance of customer orders and deposits and the acceptance of supplier orders.

4) Mold production plan and schedule: At this stage, the specific delivery date of the customer's mold needs to be replied.

5) Mold design: The possible design software includes Pro/Engineer, UG, Solidworks, AutoCAD, CATIA, etc.

6) Purchasing materials

7) Machining: The processes involved include turning, gong (milling), heat treatment, grinding, computer gong (CNC), electric spark (EDM), wire cutting (WEDM), fixture grinding, laser lettering and polishing.

8) mold assembly

9) Trial operation of the mold

10) sample evaluation report (SER)

1 1) Template evaluation report approval (SER approval)

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