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Taizhou Union Plastic Mould Co.,Ltd

ADD:No.26, MaoFeng Street, Beicheng Development Area, Huangyan Dist., Taizhou, Zhejiang, China

Post Code: 312080

Contact:Ms vicky






Relationship Between Mold And Parts And Plastic Parts Drawing
Mar 13, 2019

Plastic parts

Whether the flow of plastic material flow, shrinkage hole, weld mark, crack, stripper slope and so on affect the performance of plastic parts, dimensional accuracy, surface quality and other requirements. Pattern design is not enough, whether the processing is simple, molding material shrinkage rate selection is correct.

Molding equipment

Injection volume, injection pressure, clamping force is enough, the installation of the mold, the southern core of plastic parts, demolding has no problem, the nozzle of the injection machine and howling mouth cover are not the correct contact.

Die structure

Whether the location of parting surface and precision of finishing meet the requirements, whether there will be overflow, whether the plastic parts can be guaranteed to stay on the side of the mold with ejector device after mold opening.

Whether the demoulding mode is correct, whether the size, position and quantity of the extension rod and push pipe are appropriate, whether the push plate will be stuck by the core, and whether the forming parts will be scraped.

Mold temperature adjustment. The power and quantity of the heater; Whether the flow line position, size and quantity of cooling medium are appropriate.

To deal with the method of plastic parts making concave side, whether the mechanism of deconcave side is appropriate, such as whether the slider and push rod in the core pulling mechanism of inclined guide column interfere with each other.

Whether the position and size of pouring and exhaust system are appropriate

Design drawings

Whether the placement of mold parts on the assembly drawing is appropriate, whether it is clear and whether there is omission;

Parts on the part drawing no., name, quantity, parts made of integrity or outsourcing, it is standard or non-standard, cooperate, molding plastic parts processing precision and high precision parts size correction processing and allowance, mold parts of material, heat treatment, surface treatment, surface finish is a tag, narrative.

Main parts, forming parts of the work size and size. Dimension number should be correct, do not make manufacturer conversion.

Check the view position of all parts drawing and final assembly drawing, whether the projection is correct, whether the drawing method conforms to the drawing national standard, and whether there is any missing dimension.

Check machining performance

All parts of the geometric structure, view drawing, size mark 'whether conducive to processing

Calculate the main working size of auxiliary tools

In principle, professional proofreading should be carried out according to the designer's self-proofreading project; But it should focus on the principle of structure, process performance and operation safety. Graph should digest graph first, draw according to national standard requirement, fill in all dimensions and technical requirement. Check and sign after tracing.

Draw good base drawing to hand in a designer to check sign, custom practice is by tool manufacturing unit concerned technical personnel examines, countersign, check manufacturing craft sex, just can send next bask in

Iii. Mold test and repair

Although it is in the selection of molding materials, molding equipment, in the expected process conditions for mold design, but people's understanding is often not perfect, so it must be in the mold processing after the completion of the trial mold test, see how the quality of the molding parts. After finding out that it is always the case, correct the mold to eliminate errors.

Plastic parts appear in the majority of the types of adverse phenomena, the reasons are very complex, there are mold reasons, there are also reasons for the process conditions, the two often only hand in together.

Before molds are repaired, a detailed analysis and study should be carried out according to the actual situation of the defects in the plastic parts, and remedial methods should be proposed after finding out the causes of defects in the plastic parts. Because the molding condition is easy to change, so the general practice is to change the molding condition first, when changing the molding condition can not solve the problem, to consider repairing the mold.

Repair mold should be more careful, not very sure not to act rageously. The reason is that once the mold conditions have been changed, there can be no major changes and restoration.

Whether the performance of the parts is good or not, only in this way can the slang mold manufacturing quality.

Iv. Organize and file materials

After the test of the mold, if it is not used temporarily, it should completely wipe off the dregs, dust, oil, etc., coated with butter or other anti-rust oil or anti-rust agent, close to the storage place.

The design mold to mold processing success, inspection, during this period of technical data, such as specification, parts diagram, technical specification, mold assembly drawing, die part drawing, reproduction, mold design manual, inspection records, test repair records, sorting, binding, according to the rules to system number to be archived. This may seem like a lot of trouble, but it is very useful for repairing molds and designing new molds in the future.

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