Injection Mould Construction'>

Injection Mould Construction

A molding according to the function of each of its parts can be divided into four sections 1. Introductory part of the plastic nozzle into the cavity cavity 2. penunjuang system (support system) 3. demolding system 4. heat transfer system

Mold Base Standard Part

In the manufacture of injection mold, mold base is an integral part, mold maker can make your own mold base or buy a standard mold base, the system of the mold base can be adjusted with the construction standards required, both for the two plate and three plate, stripper plate ejectors, hot runner and mold base for a screw, when the entire standard mold base is not there to meet the new final step is to make a special mold base.

Injection Mould Classification

classification or types of mold injection very depend on what we need to make the plastic parts, because every parts have specific and unique design. when design molds we must see what the influencing factor like geometry, number of cavities, ejection principle, plastic material and shape of part.

Injection Mold Cooling

This section is the most important part of the overall mold cylcle time, because in one cycle time, the process of heat exchange to spend about 70-80% of the total cycle time, thus setting the optimal heat transfer system will greatly affect the quality and cycle time of a product.

Undercut System : Cam, Angular, Lift Cavity, Loose core

cavity and core, and its derivatives when there are undercut on product, design and construction of a good core cavity and in accordance with the requirement could increase the life of tooling itself, reduce material consumption, reduce dependence on maintenance inserts, and can reduce the cost of making the mold so the mold cost per products also declined.

Sunday, June 3, 2012

how flash occurs on mould?

11:29 PM    23 comments
this post shows the flashing process occurs in the injection mold, in fact many things that influence the occurrence of the flash, but can be broadly divided into 3
1. material effect
2. Influence of the injection mold
3. Effect of mold conditions
for example, due to the influence of material, rubber and PP is certainly more difficult to control defects in flash because it has a low viscosity compared to PBT, or Xyron. because of mold flash, can be caused by several things, among others
1. mold core thickness is insufficient, causing deflection while receiving the injection from the nozzle. this can be avoided by calculating the estimated deflection and also adds support pillar between the bottom plate with the core plate.
2. machining is not good, if this happens core or cavity must be measured first, then rewelding and re-machining.
3. if for the wrong polishing process, so that the bumpy surface (waves), surface machining has to be repeated, is made insert core, can also rewelding.
of course, before doing the repair process because of flash, we must first check the cause, either in the injection process, and the molding itself.
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