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 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 cores. On the one hand, the standard components can reduce the range of mold part manufacturing, and on the other hand, the product development circle can shrink enormously. Nowadays, standard mold components are available in different sizes and materials from 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 practice. In order to prevent the falling plastic-molded parts from being smeared with grease, the guide posts always need to be kept 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.
The contour of the plastic part determines the demolding.
The mold-releasing components include ejector pins, collapsible cores, sliders, jaws, and latch locks in different variations.
• Ejector pins should be selected so that their diameters are large enough to provide 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 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 the 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 and oil connection couplings. The most common system diameters are 9, 13, and 19 mm. There is a nominal diameter of 5 mm for cooling the small cores. The releasing couplings are available with or without a shut-off valve.
• Spiral cores are precisely inserted into the core hole, which optimally guides the medium of temperature control along the hole wall and ensures good heat transfer. Spiral cores can be designed with one or two gear adjustments.
• Spiral cores are precisely inserted into the core hole, which optimally guides the medium of temperature control along the hole wall and ensures good heat transfer. Spiral cores can be designed with one or two gear adjustments.
Latches open the second parting plane.
The additional movement of a plate or the fixing of a thimble plate are 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 on the market, some essential parts need to be made according to the mold requirements. These non-standard mold components are mostly precision parts that directly contact the core or cavities, such as mold inserts and lifts. LUSHI offer high precise mold parts for different use in the industry with our well-equiped 3-,4-,5-axis CNC machines, Wire cutting EDM machines.