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.

Saturday, January 30, 2010

Stripper Ejector Construction (step by step mold design) part 7

4:23 AM  ,  4 comments
Ejector Guide Pin and Bush
in this part, we will design ejector guide pin, EGP bush, bolts for stripper plate and bottom plate. first learn ejector system and part at link below

3D ejector drawing

hope you can understand ejector system and ejector guide pin (EGP) function, Ejector guide pin located between ejector plate and ejector stripper plate, to fit the ejector pin, we can add bolt at the bottom of EGP, and clamp it in bottom plate of mold



Bolt for spacer block
To make position of spacer block fit between backing support plate or core plate and bottom plate, add bolts from bottom plate to spacer block, see picture below for more detail. In each spacer block, add 2 pcs of bolts, the other function is when disassembling process spacer block and bottom plate became one part, it make dissembling easier




Ejector Puller Bolts
to push the stripper plate when ejecting proses begin, we need connector from ejector plate to stripper plate at core,in this case, i use ejector puller bolts, you also can use other standard part,just make sure that you can connect ejector plate to stripper plate at core side. see picture below for detail construction.
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