EN
Injection moldings are tools that give plastic products complete structure and precise dimensions. They are the core pillar of cosmetic packaging materials, especially plastic packaging materials, and also the tool for producing plastic products. This article shares several types of injection moldings.
Plastic molds give plastic products complete configuration and precise dimensions. They are tools used in conjunction with plastic molding machines in the plastic processing industry. According to different molding methods, they can be divided into different types of molds. With the cooperation of various systems or auxiliary devices in the mold, specific shape, size, function, and quality of industrial parts can be produced through high-temperature liquefaction filling of plastic particles into the mold cavity. Common mold classifications can be divided into the following categories:
When the mold is opened, the moving and fixed molds are separated, so that the plastic parts can be taken out. This is called a single parting surface mold, also known as a two-plate mold. It is the simplest and most basic form of injection molding. It can be designed as a single-cavity injection molding or a multi-cavity injection molding as needed. It is the most widely used injection mold.
The fixed mold part of the double parting surface injection molding adds an intermediate plate that can move locally. The double parting surface injection mold has two parting surfaces, so it is also called a three-plate injection molding. It is often used in single-cavity or multi-cavity injection molding with point gate feeding. When the mold is opened, the intermediate plate and the fixed mold plate are separated by a certain distance on the guide pillar, so that the condensed liquid in the injection system can be removed from between the two molds.
The inclined section of the ejector pin fixed on thefixed mold plate forces the slide to move outward. When the plastic part has a side hole or side groove, the push rod of the stripping mechanism pushes the push plate, allowing the plastic part to peel off from the core, which needs to be molded using a core that can be moved laterally or a slider.
The injection molding requires movable molding parts. Due to the special structure of some plastic parts, the molding parts can be moved out of the mold together with the plastic parts during the demolding process.
For plastic parts with screws, when automatic demolding is required, a rotatable screw mandrel or ring can be set on the mold using the opening action or rotating mechanism of the injection molding machine, or a special transmission device can be used to drive the screw mandrel or screw-shaped ring to rotate and push the plastic part out of the mold.
The insulated and heated nozzle injection mold refers to a mold without a runner, which means that there is no condensate in the gating system when the plastic parts are taken out. It keeps the plastic in a molten state between the nozzle of the injection molding machine and the mold cavity, which is called insulated runner injection mold or hot runner injection mold.
Different from other injection moldings, the right-angle injection molding is only suitable for corner injection machines. The feeding direction of this mold is perpendicular to the opening and closing direction. Its cross-sectional area is usually constant, and the main runner is located on both sides of the fixed and movable molds. The end of the main runner can be equipped with replaceable runner plugs to prevent wear and deformation of the nozzle and the entrance of the main runner.
In most injection moldings, the demolding device is installed on the side of the movable mold, which is beneficial to the operation of the ejector in the opening and closing system of the injection molding machine. However, in practical production, some plastic parts are limited by their shape, and it is better to leave them on the side of the fixed mold. Therefore, a demolding mechanism needs to be set on the side of the fixed mold.
The Market Potential Of Large Precision Mold Is EnormousSeptember 16, 2022With numerical control processing equipment levels are increased, more and more companies are increasing plastic mold development efforts, plastic molds have become a most attractive varieties of mol...viewTelecommunications Precision: Precision Mold Parts in Communication DevicesDecember 5, 2023In the world of telecommunications, precision is of utmost importance. From smartphones to routers, all communication devices require high precision mold parts to function flawlessly. Precision mold p...viewGuangdong Precision Mould Manufacturing Is In The Domestic Leading PositionSeptember 16, 2022In recent years, the obvious mold manufacturing industry has experienced rapid growth in China, especially in Guangdong, in the mold making is in the domestic leading level, and even experts expect, f...viewWhat is Injection Molding?April 4, 2023With the development of society and the improvement of people's living standards, the demand for the quality of injection molds is also increasing. The number of injection molds produced by mold f...viewChina's Mold Industry Increasingly LargeSeptember 16, 2022In recent years, the prices of China's mould industry has been rapidly growing, but in the medium and low-end of global supply chain Division of State are difficult to change in the short term, hi...view3D Printing Is Changing ArtAugust 1, 2022Whether to create models or finished works, the use of 3D printing in fine-art sculpture is still relatively rare. But those who employ it expect it grow, as the process becomes cheaper, more refined ...view
