Injection molding (plastic) mold main classification

Plastic mold main classification

According to the different molding methods, can be divided into different process requirements corresponding to the main types of plastic processing molds are injection molding molds, extrusion molding molds, blister molding molds, high-foam polystyrene molding molds, and high-foam polystyrene molding molds.injection molding molds, extrusion molding molds, blister molding molds, high-foam polystyrene molding Moulds, etc

1、Plastic injection (plastic) molds

It is mainly the most commonly used mold in the production of thermoplastic parts.

The corresponding processing equipment for plastic injection molds is plastic injection molding machine.

Plastic injection molding machine, the plastic is first heated in the bottom of the injection machine barrel

The plastic is first heated and melted in the barrel at the bottom of the injection machine, and then pushed by the screw or plunger of the injection machine.

The plastic is firstly heated and melted in the barrel of the injection machine, and then pushed by the screw or plunger of the injection machine, through the injection nozzle and the pouring system of the mold into the mold cavity.

The plastic is then cooled and hardened, and the product is released from the mold. The structure usually consists of molding parts, pouring system, guiding parts and so on.

The structure usually consists of molding parts, pouring system, guiding parts, pushing mechanism, temperature regulating system, exhaust system, supporting parts, etc.

The structure usually consists of molding parts, casting system, guiding parts, pushing mechanism, temperature regulating system, exhaust system, supporting parts, etc. The manufacturing material is usually

Plastic mold steel module, commonly used materials are mainly carbon structural steel

Carbon tool steel, alloy tool steel, high-speed steel, etc. Injection molding

The injection molding process is usually only applicable to the production of thermoplastic products, and a wide range of plastic products are produced by the injection molding process, from daily use products to all kinds of complex machinery, electrical appliances, transportation parts, etc. are molded with injection, it is the most widely used in the production of plastic products of a processing method.

2、Plastic compression molding mold

Including compression molding and injection molding two types of structural mold. They are mainly used to mold thermosetting plastics, and the corresponding

The corresponding equipment is pressure molding machine. Compression molding method according to the characteristics of plastic

The mold is heated to the molding temperature (generally 103°-108°) and

Then the measured compression molding powder is put into the mold cavity and the filling chamber, and the mold is closed.

The plastic is softened and viscous under the action of high heat and pressure.

After a certain period of time, the plastic is cured and shaped into the desired product shape. Compression molding

The mold is different from compression molding in that there is a separate filling chamber.

The mold is closed first, and the plastic is preheated in the filling chamber and becomes viscous flow.

The plastic is preheated in the filling chamber to a viscous flow state, and is then adjusted and squeezed into the mold cavity under pressure to harden the mold. Compression Molds

Compression molds are also used to mold some special thermoplastics such as difficult-to-melt

Thermoplastics (e.g. polyvinylidene fluoride) blanks (cold compression molding).

Resin lenses with high optical properties, nitrocellulose with slight foaming automotive steering wheels, etc. The compression mold mainly consists of a cavity, a filling cavity, a guiding mechanism, a push-out part, and a heating system.

The mold is mainly composed of cavity, filling cavity, guide mechanism, push out parts, heating system, etc. Press-injection molds are widely used for encapsulating electrical components.

They are widely used for encapsulating electrical components. The materials used in the manufacture of compression molds are

It is basically the same as the injection mold.

3、Plastic extrusion mold

A type of mold used to form and produce continuous shape plastic products, also

called extrusion molding machine head, widely used in dry pipe, bar, monofilament, plate

material, film, wire and cable cladding, profiles, etc. With

The corresponding production equipment is a plastic extruder, which is based on the principle of solid plastic

The principle is that the solid plastic material is melted and plasticized under the conditions of heating and extruder's screw rotation and pressure.

The plastic extruder is heated and the extruder's screw is rotated and pressurized.

The extruders are made of carbon structured materials. The main materials used in the manufacture of extrusion dies are carbon structural steel

and alloy tooling, etc. Some extrusion dies are made from parts that require wear-resistant

Some extrusion dies are also inlaid with diamond and other wear-resistant materials. The extrusion medium process is usually only

for thermoplastic products, its structure is different from that of injection moulds and compression moulds have obvious differences.

4、Plastic blow molding molds

It is used for molding plastic container hollow products (such as beverage bottles, daily chemical

(such as beverage bottles, daily necessities and other packaging containers) of a mold, blow molding form

According to the process principle, there are mainly extrusion blow molding hollow molding, injection blow molding hollow molding, injection extension blow molding hollow molding (commonly known as "injection pull blow") multi-layer blow molding hollow molding, sheet blow molding hollow molding, etc. Hollow

The equipment corresponding to blow molding of hollow products is usually called plastic blow molding machine.

Blow molding machine, blow molding is only applicable to the production of thermoplastic varieties of products.

Blow molding mold structure is relatively simple, the materials used are mostly carbon more then the system manufacture.

5、Plastic blister mould

Is the plastic plate, sheet as raw material molding some simpler plastic products

The principle of a mold is to use the vacuum bloom method or compressed

The principle is to use the vacuum opening method or compressed air forming method to make the plastic plate or sheet fixed on the concave or convex mold.

In the case of heating and softening, the plastic sheet or plate is deformed and attached to the cavity of the mold to obtain the desired product.

to the required molded products, mainly used for some daily necessities, food, toys

It is mainly used in the production of daily necessities, foodstuffs, toys and other packaging products. The pressure of blister mold is low.

Low pressure, so the mold material is mostly made of cast aluminum or non-metallic materials.

The structure is relatively simple.

6、High foam polystyrene molding mold

Is the application of polystyrene (composed of polystyrene and blowing agent

bead material) raw materials to form a variety of desired shapes of foam packaging materials.

A mold of the desired shape of foam packaging materials. The principle is that the EPS can be molded in the mold

It includes simple hand-operated molds and hydraulic presses.

There are two types of straight-through foam molds, mainly used to produce industrial

It is mainly used for the production of industrial packaging products. The materials used to make these molds are cast aluminum, stainless steel, bronze, etc.

stainless steel, bronze, etc.