Introduction to injection mold structure

author: Universe plastic

2024-03-25

Injection mold is an important tool for producing plastic products. It is mainly composed of multiple components and mechanisms, each part has its specific function.

Different plastic products require different mold structures to complete production. The following is an introduction to the main structures of injection molds by Universe Plastics engineers:

1.Mold base

Structure: fixed template, movable template

Function: The mold base is the support structure of the mold, used to install and fix other components of the mold, and ensure that the mold can be positioned accurately on the injection molding machine.

2. Molding system

Structure: Cavity and Core

Function: The mold cavity and mold core are the main parts that form the shape of plastic products. Usually the mold cavity is installed in the fixed mold and the mold core is installed in the movable mold. When the movable mold and the fixed mold are closed, the mold cavity and the mold core form a closed space in which the plastic is formed.

3. Gating System

Structure: gate, runner, nozzle

Function: The pouring system is the channel that guides the molten plastic into the mold cavity. The gate is the entrance for the molten plastic to enter the mold cavity. The runner is the channel through which the plastic flows from the nozzle to the gate. The nozzle connects the injection molding machine and the mold.

4. Cooling System

Structure: cooling water channel

Function: The cooling system is used to control the mold temperature to ensure the quality and production efficiency of plastic products. Pass water or other cooling liquid into the cooling water channel to take away the heat in the mold.

5. Ejection System

Structure: Ejector Pin, Ejector Plate, ejection mechanism

Function: The ejection system is used to push the molded plastic products out of the mold. The ejection pin pushes the plastic products out of the mold through the push of the ejection plate.

6. Guiding System

Structure: guide post, guide sleeve

Function: The guide system is used to ensure that the movable mold and the fixed mold are accurately aligned when closing. When the mold is closed, the guide posts enter the guide bushings, ensuring accurate mold alignment.

7. Ventilation System

Structure: exhaust holes, mold gaps

Function: The exhaust system is used to discharge the air in the mold cavity to prevent bubbles or other defects during the molding process.

8. Clamping System

Structure: fixture

Function: The mold clamping system is used to clamp the mold to prevent molten plastic from overflowing during injection molding. The clamping pressure is usually provided by the injection molding machine mechanical or hydraulic device.

9. Runner System

Structure: Sprue, Runner and Gate

Function: The runner system is the channel that connects the gate and the mold cavity. The quality of the runner system design directly affects the quality of plastic products and injection molding efficiency.

10. Other auxiliary structures

Structure: Slider, Lifter

Function: The mold may also include some special structures, which are used to form some complex structures or achieve demoulding actions.

Summarize

By understanding the basic structure of injection molds, coupled with reasonable design and manufacturing, high-quality injection molds can be obtained, which can improve the quality and production efficiency of plastic products.

Dongguan Universe Plastic Co., Ltd. has more than 15 years of experience in manufacturing injection molds. It has a professional team and advanced processing equipment to provide high-quality and cost-effective injection mold manufacturing services.

If you are looking for a professional mold manufacturer, please contact us to get the latest service quotation.

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