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Precision Plastic Injection Mold

Mold injection molding is a processing method used in mass production of some complex-shaped parts. The specific principle refers to: the plastic raw materials melted by heat are pushed by the screw of the injection molding machine into the cavity of the plastic mold under high pressure, and after cooling and solidification, the plastic molded product is obtained.

  • Item NO.:

    007
  • Product Origin:

    China
  • Color:

    nature
  • Shipping Port:

    Shenzhen
  • Product Detail

Precision Plastic Injection Mold


The plastic mold is composed of a movable mold and a fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic products.


Features

Although the structure of the mold may vary widely due to the variety and performance of plastics, the shape and structure of plastic products, and the type of injection machine, the basic structure is the same. The mold is mainly composed of a pouring system, a temperature control system, forming parts and structural parts. Among them, the pouring system and molded parts are the parts that are in direct contact with the plastic and change with the plastic and the product. They are the most complex and the most variable parts in the plastic mold, requiring the highest processing finish and precision. Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of some complex-shaped parts. Specifically, it refers to the high-pressure injection of the plastic melted by heat into the mold cavity by the injection molding machine, and the molded product is obtained after cooling and solidification. Mold composition Although the structure of the mold may be ever-changing due to the variety and performance of plastics, the shape and structure of plastic products, and the type of injection machine, the basic structure is the same. The mold is mainly composed of a pouring system, a temperature control system, forming parts and structural parts. Among them, the pouring system and molded parts are the parts that are in direct contact with the plastic and change with the plastic and the product. They are the most complex and the most variable parts in the plastic mold, requiring the highest processing finish and precision. The injection mold is composed of a movable mold and a fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic products. In order to reduce the heavy workload of mold design and manufacturing, most of the injection molds use standard mold bases.

When the single parting surface injection mold is opened, the movable mold and the fixed mold are separated to take out the plastic part, which is called a single parting surface mold, also called a double-plate mold. It is the simplest and most basic form of injection molds. It can be designed as a single-cavity injection mold or a multi-cavity injection mold according to needs. It is the most widely used injection mold.

Advantage

Double parting surface injection mold The double parting surface injection mold has two parting surfaces. Compared with the single parting surface injection mold, the double parting surface injection mold adds an intermediate plate that can be moved locally in the fixed part of the mold. It is called a movable gate plate, which is equipped with gates, runners and other parts and components required by the fixed mold), so it is also called a three-plate (moving plate, intermediate plate, fixed plate) injection mold, which is often used for point casting For single-cavity or multi-cavity injection molds with inlet materials, when the mold is opened, the intermediate plate is separated from the fixed template at a fixed distance on the guide post of the fixed mold, so that the casting system condensate can be taken out between the two templates. The double parting surface injection mold has complex structure, high manufacturing cost, and difficult parts processing. Generally, it is not used for the molding of large or super large plastic products.


The injection mold with lateral parting and core pulling mechanism, when the plastic part has side holes or undercuts, it needs to be molded with a core or slider that can move laterally. After injection molding, the movable mold first moves down for a certain distance, and then the inclined section of the bending pin fixed on the fixed template forces the slider to move outward, and at the same time, the push rod of the demolding mechanism pushes the pusher plate to make the plastic part self-molding Take off the core.

Injection molds with movable forming parts due to the special structure of plastic parts, the injection mold is required to be equipped with movable forming parts, such as movable punches, movable concave molds, movable inserts, movable thread cores or rings, etc. , It can be moved out of the mold together with the plastic part during demolding, and then separated from the plastic part.

Automatic thread unloading injection mold For plastic parts with threads, when automatic demolding is required, a rotatable thread core or ring can be set on the mold, and the mold opening action or the rotation mechanism of the injection molding machine can be used, or a special The transmission device drives the threaded core or threaded ring to rotate, thereby pulling out the plastic part.

No-runner injection mould No-runner injection mould is a method that uses adiabatic heating of the runner to keep the plastic between the nozzle and the cavity of the injection moulding machine in a molten state, so that there is no condensate in the pouring system when the mould is opened and the plastic part is taken out. The former is called adiabatic runner injection mold, and the latter is called hot runner injection mold.

Right-angle injection molds Right-angle injection molds are only suitable for angle-type injection molding machines. The difference from other injection molds is that the feeding direction of this type of mold is perpendicular to the opening and closing directions during molding. His main channel is opened on both sides of the parting surface of the moving and fixed molds, and its cross-sectional area is usually constant. This is different from the molds used in other injection molding machines. The end of the main channel is to prevent injection molding machines. For the wear and deformation of the nozzle and the inlet end of the main runner, replaceable runner inserts can be set.

Precision Injection Mold Part

In most injection molds, the ejection device is installed on the side of the movable mold, which facilitates the work of the ejector device in the mold opening and closing system of the injection molding machine. In actual production, because some plastic parts are limited by the shape, it is better to leave the plastic part on the side of the fixed mold for molding. This makes the plastic part out of the mold, and it is necessary to set a release on the side of the fixed mold. mechanism.

The injection mold is composed of a movable mold and a fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic products. In order to reduce the heavy workload of mold design and manufacturing, most of the injection molds use standard mold bases.


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