chinese plastic molding manufacturing for molded parts
by Lushi-Molding  | march 10st. 2020  |  Tags: Injection molding manufacturing

The rational mold making with standard mold components

The rational production of injection molds begin with the standardization of mold components. The standardized parts in a mold are called standard components. Today, the toolmaker uses standard components for the manufacturing of plastic injection molds to reduce the cost of injection mold making and increase the efficiency.

Standard components for rational mold making

The injection molds consist of two or three plates, which connect the ejector side and nozzle side with the guide post. The toolmaker can concentrate entirely on the manufacturing of the formed components, such as mold cavities and core. On the one hand, the standard components can reduce the range of mold part manufacturing and the product development circle enormously on the other hand. Nowadays, standard mold components are available in different sizes and materials by different manufacturers.

Guide components ensure exact guidance

Guide elements are necessary so that the injection mold inserts and cores are not damaged when the mold is closed. Guide bolts and bushes are mostly used for small and light molds in the practice. In order to prevent the falling plastic molded parts from being smeared with grease, the guide posts always need to keep dry, i.e. without lubrication. The standard components offer self-lubricating, maintenance-free guide bushes. For medium to large molds it is advisable to support the tools on the injection molding machine.

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The contour of the plastic part determines the demolding

The mold releasing components include ejector pins, collapsible cores, sliders, jaws and latch lock in different variations.

• Ejector pins should be selected that the diameters are large enough to bring enough forming force in the injection molding. The ejector force must be greater than the adhesive force of the molded part in the mold cavity. If the adhesive force is too high, the molded parts will be damaged during demolding.

• Collapsible cores are a good and inexpensive way to demold the parts with an internal undercut and internal threads. The cores are hardened and ready for the mold installation.

• Slider and jaws: External undercuts are usually demolded using laterally moving elements, including slides, jaws and core pulls.

• Latch lock: For molds with several parting lines, latch locks are required to open the second parting plane.

Diversity in temperature control in injection molding process

There are a number of standard components for effective injection mold cooling. Starting with water / oil connection couplings to hoses, core pins, deflection elements and spiral cores.

• Water connection couplings: The standard mold components supply a wide range of water / oil connection couplings. The most common system diameters are 9, 13 and 19 mm. There is a nominal diameter with 5 mm to cooling the small cores. The releasing couplings are available with or without a shut-off valve.

• Spiral cores is precisely inserted into the core hole, which optimally guides the medium of temperature controlling along the hole wall and ensures good heat transfer. Spiral cores can be designed with one or two gears adjustments.

• Spiral cores is precisely inserted into the core hole, which optimally guides the medium of temperature controlling along the hole wall and ensures good heat transfer. Spiral cores can be designed with one or two gears adjustments.

Latches open the second parting plane

The additional movement of a plate or the fixing of a thimble plate is typical tasks that can be solved with a latch pull. These functions, which create an additional parting plane, are only carried out during the ascending movement.

Customized injection mold components

In addition to the standard mold component, which can be bought in the market, there are some essential parts need to be made according to the mold requirements. These non-standard mold components are mostly the precision parts, which directly contact with the more core or cavities, such as mold inserts and lifts.


More Infos Please Contact Us:

Email: jonas@lushimold.com
Jonas Zhan
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Blog Tags:

Injection Molding Tool

Plastic Injection Molding

Molding Technology

Mold Design

Injection Molding Process

Additive Manufacturing

Plastic Materials

Industrial applications

Chinese Tooling

Industry 4.0


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