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What part of the injection mold is composed of structure

Issuing time:2019/10/11 10:33:42

Gating system
The injection system refers to a part of the flow path of the plastic from the nozzle before entering the cavity, including the main channel, the cold hole, the split channel and the gate.
2. Molded parts system:
Molded part systems refer to the various parts and components that make up the shape of the product, including movable, fixed and cavity (concave), core (punched)
, forming rods, etc. The core forms the inner surface of the article and the cavity (arm) forms the outer surface shape of the article. After clamping, the core and cavity form the cavity of the mold. According to the process
And manufacturing requirements, sometimes only inserts are used for parts whose core and mold consist of several parts, sometimes made integral, and easily damaged and difficult to handle.
3. Temperature control system:
The temperature control system must meet the mold temperature requirements during the injection process and a temperature control system is required to control the temperature of the mold. For thermoplastics
The injection mold of the material, the cooling system is mainly used to cool the mold (the mold can also be heated). A common method of mold cooling is to open the coolant passage in the mold, and
The circulating coolant is used to remove heat from the mold. Cooling water can be used to install a mold heating device inside and around the mold to allow hot water or hot oil to pass. Electric heating
element.
4. Exhaust system:
The exhaust system is designed to remove gases generated by the melting of air and plastic in the cavity during the injection molding process, and when the exhaust is not smooth, the gas will
Formed on the surface of the product. The exhaust system of the mold is usually a gapped air outlet, and the open air is opened inside the mold to discharge the gas in the original cavity.
And the gas of the molten material.
When the molten material is injected into the cavity, the gas introduced by the air and the melt stored in the original cavity must be discharged from the mold through the discharge port at the end of the flow.
Out. Otherwise, the product will have air holes and poor connections. The filler is not full, and even the air accumulated due to the high temperature generated by compression will burn the product. usually,
The venting holes can be placed at the end of the melt stream from the cutting surface of the cavity or mold.
The latter is a shallow groove having a depth of 0.03-0.2 mm and a width of 1.5-6 mm on one side of the mold. The orifice does not melt during the injection process, and the melt
Cool to block the passage of the passage. Do not aim the vent at the operator to prevent the melt from accidentally spraying or injuring. In addition, the matching gap between the ejector rod and the ejector hole
The clearance between the upper block and the stripper and the core can be used for exhausting.
5. Guidance system:
The guiding system allows for precise centering of the movable and stationary molds during mold clamping and the provision of guiding members in the mold. Injection mold
In the middle, four sets of guiding members and guiding sleeves are usually used to form the guiding members, and sometimes an inner tapered surface and an outer tapered shape are respectively disposed on the moving mold and the fixed mold.
Surface to aid in positioning. 6, exhaust system:
The ejector system usually includes a thimble, a front ejector plate and a rear ejector plate, a thimble guide bar, a thimble return spring, a thimble plate locking screw, and the like. When the product is in the mold
When molding and cooling, the front and rear molds of the mold are separated and opened, and the pushing mechanism of the ejector under the pusher of the injection molding machine, in the plastic product
The aggregates and runners are in the open and runner positions of the mold. Push out or pull out. Carry out the next injection molding cycle.