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Analysis of mould structure and classification of related parts

Return list Reffer:NITONI Click number:- Release time:2018-01-06

1. Mold structure

Many different kinds of mold, because of the similarity function, forming mold parts in a different mold often has the same structure characteristic, in a typical injection mold and stamping die structure analysis, for example, to find the mold parts processing.

Analysis of mould structure and classification of related parts

The basic structure of injection mould

The basic structure of injection mould is divided into forming parts, pouring system, guiding mechanism, ejection mechanism, lateral parting and core mechanism, cooling heating system and exhaust system.

A. Forming part refers to the parts that make up the mold cavity, mainly including: convex die, concave mode, core, forming rod, forming ring and insert, etc.

B. Pouring system refers to the plastic flow passage from the injection molding machine nozzle to the cavity.Ordinary pouring system is composed of mainstream channel, shunt channel, gate, cold hole, etc.

C. The guiding mechanism is mainly in the plastic mould to locate, guide and bear the effects of certain lateral pressure, ensuring the accuracy of moving and mold closing mode.The mould guide is composed of guide, guide or guide hole (directly on the template), locating cone, etc.

D. The ejection device mainly functions from the top of the mould, which consists of the top or top pipe or push plate, the top of the board, the top rod plate, the reset lever and the pull rod.

E. side parting and core pulling machine's role is to take off the open side punch or out side core, usually include oblique guide pillar, bent pin, guide, wedge block, technoloy, chute, gear and rack, etc.

The function of the cooling heating system is to adjust the mold process temperature, which consists of cooling system (cooling water hole, cooling sink, copper pipe) or heating system.

The function of the exhaust system is to eliminate the gas in the cavity, mainly composed of the exhaust tank and the clearance.

2. The basic structure of the punching die

The basic structure can be divided into process and auxiliary parts.Process parts include working parts, locating parts, unloading and ejection parts, etc.Auxiliary parts include guide parts, support and clamping parts and fastening parts and other parts.

A. The working parts are mainly composed of punch die, concave mould, convex die and blade.

B. Positioning parts are made up of positioning pin, retaining pin, guide pin, guide plate and setting side edge.

C. Unloading and ejection parts are composed of presser board, discharge board, ejector, top pin and push plate.

D. Guide parts consist of guide, guide, guide and guide.

E. Support and clamping parts are made up of up and down templates, die handles, concave die plates, gaskets and limiters.

F. Fastening parts and other parts include: screw, pin, spring, lifting handle and bracket.

3. Classification of mould parts

Although the parts that make up the mould structure are many, the function, the shape and the use requirements are not the same, but the analysis of the characteristics of processing technology from the structure can be roughly divided into four categories.

A. Shaft type parts include guide column, guide sleeve, gate sleeve, die handle, positioning ring, etc.

B. Rod parts include top rod, reset lever, push rod, pull rod, etc.

C. Board parts include template, gasket, unloading board, push board, pad, etc.

D. Molding parts include punch, die, core, cavity, etc.

4. Composition of mould parts and parts

The shape of the parts that make up the mold is different, but the basic surface of each part can be summarized as 3 kinds.

A. Outer surface, inner circle, cone, etc.

B. Surface of planar plate and end face of shaft.

C. Curved surface and 3d surface of curved surface.

The essence of mould parts forming is to solve these three basic surface processing problems.For the surface of rotary surface, the traditional cutting process can be formed, and different processing schemes can be selected according to different precision requirements and different materials.

5. Selection of blank for mold parts

The mould parts are mainly made of forgings, castings, welds, various profiles and plates.When choosing blank, the main factors to consider are the rules of mold drawing.The structure and geometry of the die parts;Production batch;Materials of mould parts and requirements for material organization and mechanical properties.The common blank for shaft and socket parts is the round rod or forging, which is not too high for the smooth shaft, the sleeve and the diameter of the lower part of the shaft or sleeve.The mechanical properties require high shaft, sleeve and diameter of the shaft or sleeve with a wide range of diameters.Rod - type parts are similar to shafts and sets. Non - round bars can also be used.Top material plate and unloading plate and other board parts are made of steel plate cutting blank, with high precision and heavy load.Forming die, die and other important parts require forging die.

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