Mold Making

Mold Making refers to the processing of forming and blanking tools, in addition to shear dies and die-cutting dies. Typically, a mould consists of two parts: the upper mould and the lower mould. A steel plate is placed between the upper and lower moulds and the material is shaped under the action of a press. When the press is opened, the workpiece defined by the shape of the mould is obtained or the corresponding scrap is removed. Workpieces as small as an electronic connector or as large as an automobile dashboard can be shaped with a mould. A progressive mould is a set of moulds that can automatically move the processed workpiece from one station to another and get the shaped component at the last station. Mould processing technology includes: cutting die, blanking die, composite die, extrusion die, four-slide die, progressive die, stamping die, die-cutting die and so on.

1，Types of dies.

1) Metal stamping dies: Progressive die, single-shot molding, Compound die, drawing die

(2) Plastic moulding dies: injection moulds, extrusion moulds, vacuum molding

(3) die-casting moulds

(4) Forging die

(5)Powder metallurgy moulds

(6) Rubber moulds

2, mould processing process.

Cutting: front mould material, rear mould material, insert material, line position material, oblique top material;

Roughening: front mould cavity roughening, rear mould cavity roughening, mould parting line roughening.

Copper male: copper male for front mould, copper male for rear mould, copper male for clearing angle of mould parting line.

Wire cutting: mould parting line for inserts, copper male, slanting top pillow position;

CNC manufacturing : CNC parting line, CNC rear mould core.

EDM: cavity Insert, copper electrode, male mould line clearing, core insert, cavity;

Drilling, pinhole, ejector pin; mould ejector pin hole waterway hole processing line position, line position pressure pole;

Slant top, compound thimble, with thimble.

3, Basic features.

(1) The moulds requiring high processing accuracy are generally composed of concave moulds, convex moulds and mould frames, and some of them may also be multi-piece collocation modules. So the combination of the upper and lower mould, the combination of inserts and cavities, the combination between the module requires high processing accuracy. Precision mould dimensional accuracy is often up to μm level.

(2) complex shape and surface of some products such as automotive coverings, aircraft parts, toys, household appliances, the shape of the surface is a combination of a variety of surfaces, therefore, the mould cavity surface is very complex. Some surfaces require mathematical calculations for processing.

3) small batch mould production is not a large number of batch production, in many cases tend to produce only one payment.

(4) process more mould processing always use to milling, boring, drilling, reaming and tapping threads and other processes.

(5) Repeatability of production moulds have a life expectancy. When the use of a mould more than its life, it is necessary to replace the new mould, so the production of moulds is often repetitive.

(6) imitation processing mould production sometimes neither drawings, nor data, and according to the physical object to be imitation processing. This requires high imitation precision and no deformation.

(7) mould material excellent, high hardness mould main material more than the use of high-quality alloy steel manufacturing, especially the high life of the mould, often using Crl2, CrWMn and other leucoplast steel manufacturing. This type of steel from the blank forging, processing to heat treatment have strict requirements. Therefore, do not ignore the preparation of the processing technology; the heat treatment of deformation also presents a serious issue to address during processing.

According to the above characteristics, in the selection of machine tools to meet the processing requirements as far as possible. Such as the function of the CNC system should be strong, high precision machine tools, rigidity should be good, thermal stability should be good, with profiling function.

4, processing process arrangement:

(1) the bottom surface processing, processing volume to ensure that;

(2) casting blank datum correction, 2D, 3D type surface allowance checking;

(3) 2D, 3D surface roughing, non-installation of non-working plane processing (including the safety platform surface, buffer mounting surface, pressure plate plane, side datum);

(4) Before semi-finishing machining, the side datum plane is corrected to ensure accuracy.

(5) semi-finishing 2D, 3D type surface, finishing various types of installation work surface (including limit block mounting surface and contact surface, block mounting surface and backside, punch mounting surface, waste cutter mounting surface and backside, spring mounting surface and contact surface, various types of travel restriction work surface, inclined wedge mounting surface and backside), semi-finishing various types of guiding surfaces, guide holes, leaving a margin of finish machining process reference holes and height datum surface. And record the data.

(6) Inspection and review of machining accuracy.

Clamping work processes.

Before finishing, the process datum hole datum alignment, insert allowance checking

Finishing of profiles 2D and 3D, side punching of profiles and holes, finishing of process datum holes and height datums, finishing of guide surfaces and guide holes

nspection review of machining accuracy.

The above is the content introduction of what is mould processing and what is the main processing process of SPP Indsutry Company, I hope it will be helpful to you!