Parting surfaces of injection mould General The parting surfaces of a mould are those portion of both mould plates,adjacent to the impressions,which butt together to form a seal and prevent the loss of plastic material from the impression. We can classify the parring as being either flat or mom-flat.Examples of the latter type include stepped,profiled
Sprue Bush and Register Ring The sprue bush is defined as that part if the mould in which the sprue is formed.In practice the sprue bush is the connecting member between the machine nozzle and the mould face,and provides suitable aperture through which the material can travel on its way to the impressions or
Feed system of mould It is necessary to provide a flow-way in the injection mould to connect the nozzle (of the injection molding machine) to each impresion. This flow way is terned the feed system. Normally the feed system comprises a sprue, runner and gate. these terms apply equally to the flow-way itself, and to
How to choose the hot runner for the injection mold Hot runner technology, with its advantages of low scrap rats, shorter the molding cycle times, has become an important direction of development of plastic injection molding process. In western countries, hot runner system are widely employed in injection molding process, in China mold making industry, hot runner
Main sprue design for mould The main sprue is the first part of the plastic melt entering the injection mold cavity. It introduces the plastic melt injected from the injection molding machine nozzle into the split runner or injection mold cavity, and its shape is conical, which facilitates the smooth flow of the melt.
The reason causes mold with hot runner leakage Is the leakage on the outside of the mold or internally. Possible causes for external leaks are worn probe seals or improper cleaning when being maintenance. Internal leakage may be caused by shooting through when manifold in not fully up to temp or wear on the
INJECTION MOLDING PROCESS FOR PP PLASTICS “Plastic properties are the basis of injection molding technology”. Mastering the technological properties and characteristics of various plastics is a basic professional knowledge that every injection molding worker must know. The performance of plastics is the basis for setting “injection molding process conditions”. It is also the reason
Cost Analysis of plastic injection mold Rapid Plastic Injection Mold Cost Calculation Mold price = materials cost + design cost + processing cost and profit + VAT + tryout cost + packing and shipping costs The typical ratio is: Materials cost: materials and standard parts proportion are 15% - 30% of total cost; Processing cost