Whether the mold is good or not, mold processing is very important!

2021-03-23 18:28:03 admin

Whether the mold is good or not, mold processing is very important!

Mold processing technology includes: cutting die, blanking die, compound die, extrusion die, four slide rail die, progressive die, stamping die, die cutting die, etc.

Mold type

Metal stamping die: continuous die, single punch die, compound die, drawing die

Plastic molding molds: injection molds, extrusion molds, blister molds, die-casting molds

Forging die

Powder metallurgy mold

Rubber mold

Mold processing process

Cutting material: front mold material, rear mold material, insert material, row position material, inclined top material.

Open frame: front mold frame, rear mold frame.

Rough opening: the front mold cavity is opened, the back mold cavity is opened, and the parting line is opened.

Copper male: front mold copper male, rear mold copper male, parting line clear angle copper male.

Wire cutting: insert parting line, copper male, inclined top pillow position.

Computer gong: fine gong parting line, fine gong back mold core.

EDM: thick front mold, clear corners of copper male and male mold lines, back mold bone position, pillow position.

Drilling, pinhole, thimble; mold thimble hole waterway hole processing row position, row position pressure pole.

Inclined top, compound thimble, with thimble.

Basic Features

1. High processing accuracy requirements: a pair of molds is generally composed of a concave mold, a convex mold and a mold base, and some may also be a multi-piece split module. Therefore, the combination of upper and lower molds, the combination of inserts and cavities, and the assembly of modules require high machining accuracy. The dimensional accuracy of precision molds often reaches the μm level. 2. Complex shape: Some products, such as car covers, aircraft parts, toys, and household appliances, have a combination of multiple curved surfaces. Therefore, the mold cavity surface is very complicated. Some curved surfaces must be processed by mathematical calculation methods.

3. Small batch: The production of molds is not mass production, and in many cases only one pair is produced.

4. Many processes: Milling, boring, drilling, reaming and tapping are always used in mold processing.

5. The use of repetitive production molds has a long life: when a pair of molds exceeds its life, a new mold must be replaced, so the production of molds is often repetitive.

6. In the production of profiling molds, sometimes there is neither pattern nor data, and profiling must be performed according to the actual object. This requires high imitation accuracy and no deformation.

7. The mold material is excellent, and the main material of the mold with high hardness is mostly made of high-quality alloy steel, especially the long-life mold, which is often made of ledeburite steel such as Crl2, CrWMn.

According to the above-mentioned many characteristics, the machine tool should be selected to meet the processing requirements as much as possible, such as the function of the CNC system, the precision of the machine, the rigidity, the thermal stability, and the profiling function.

Processing process

1. The bottom surface is processed and the processing volume is guaranteed.

2. Alignment of casting blank datum, 2D and 3D surface allowance inspection.

3.2D, 3D profile rough machining, non-installation non-working plane machining.

4. Before semi-finishing, the side reference surface is aligned to ensure accuracy.

5. Semi-finishing 2D and 3D profiles, finishing all kinds of installation working surfaces, semi-finishing all kinds of guide surfaces, guide holes, leaving a margin for finishing process reference holes and height reference surfaces, and recording the data.

6. Inspect and review the machining accuracy.

7. Fitter inlay process.

8. Before finishing, align the datum surface of the process datum hole and check the insert margin.

9. Finishing profile 2D, 3D, side punch profile and hole position, finishing process reference hole and height reference, finishing guide surface and guide hole.

10. Inspect and review the machining accuracy.


1. The process design is concise and detailed, and the processing content is expressed numerically as much as possible.

2. For the key and difficult points of processing, the craftsmanship should be particularly emphasized.

3. It is necessary to combine the processing parts and the process is clearly expressed.

4. When the insert needs to be processed separately, pay attention to the process requirements of the processing accuracy.

5. After combined processing, for the insert parts that need to be processed separately, the process is equipped with the benchmark requirements for separate processing during combined processing.

6. Springs are the most easily damaged in mold processing, so choose mold springs with long fatigue life.