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.

Showing posts with label disc gate. Show all posts
Showing posts with label disc gate. Show all posts

Sunday, May 18, 2008

Diaphragm Gate Design in Thermoplastic Mold

Actually this gate is another variation of side gate, but this gate have circumferential shape like fan gate,some time it also named as disc gate. basic modeling of diaphragms gate is like the picture below


this type applied when at the center of product has a trough hole, plastic flow when injections is similar to direct gate, but flow plastic material more constant and controlled becouse this gate have circular flat thickness. this gate punched out after ejection.

Design and Size
the following picture below shown basic part and size of diaphragm gate.

The gate height (t) is preferred about 0.1mm -0.17 mm
The circular runner height (T) is recommended about 5-10 mm depend on your size of product.
Land size (D-d) is about 1mm-5 mm each side.