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Welcome to Dongguan many hardware Ceramics Co., Ltd., a manufacturer specializing in zirconia ceramics.

Ceramic dispensing valve ceramic plunger ceramic suction disc sucker

Specializing in alumina ceramic and zirconia ceramics processing and customization

National service consultation telephone 132-8888-6353 (WeChat No. 1)
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Dongguan many many hardware Ceramics Co., Ltd.
Contact: Mr. Han
Mobile phone: 13288886353
Tel: 0769-82926445
QQ:304871063
Mailbox: Duoxuduo2006@163.com
Website: bjyjpf.cn
Address: No. 6 Chuang Road, Shang Sha first industrial area, Changan Town, Dongguan.

Ceramic injection molding
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Injection molding (Injection Molding): it is a model with a certain shape, which is formed by injecting the colloid into the mold cavity by pressure. The technological principle is to melt the solid plastic according to a certain melting point, injecting the pressure of the machine, and injecting mold into the mould at a certain speed. The mould is solidified through the water channel to solidify the plastic and get the same product as the mold cavity. It is mainly used for molding thermoplastic plastics and also for shaping thermosetting plastics.

Technological process

The complete injection process includes: 1. Preparation before molding; 2, injection process; 3, post-processing of products.

Preparation before molding

In order to ensure the smooth operation of injection molding and ensure the quality of products, a series of preparatory work such as raw material pretreatment, cleaning machine barrel, preheating insert and selecting release agent are needed before production.

Injection process

Injection process generally includes: feeding - plasticizing - injection - cooling - demoulding.

Injection molding charging:

Since injection molding is a batch process, quantitative (constant volume) charging is required to ensure stable operation, plastic plasticization and high quality plastic parts.

Injection molding and plasticizing:

The molding material is heated, compacted and mixed in the barrel of the injection machine, and the process is changed from loose powder or granular solid into continuous homogenized melt.

Injection molding:

The plunger or screw starts from the metering position in the barrel, and the plasticized plastic melt passes through the cylinder by injecting the oil cylinder and the piston by applying high pressure.
The nozzle in the front and the gating system in the mold are quickly sent into the closed die cavity. Injection can be divided into three stages: flow filling, pressure maintaining, backfilling.

Injection molding cooling:

When the plastic system of the gating system is frozen and the pressure is maintained, it is no longer needed. Therefore, it is possible to return the plunger or screw, remove the pressure of the plastic melt in the barrel and add the pressure.
At the same time, the cooling medium, such as cooling water, oil or air, can be further cooled in the mold, which is further cooled. This stage is called cooling after the gate is frozen.
In fact, the cooling process starts with the injection of plastic melt into the cavity, which includes the period from filling and holding to the time before stripping.

Injection molding stripping:

When the plastic parts are cooled to a certain temperature, the mold can be opened, and the plastic parts are pushed out of the mold under the action of the pushing mechanism.

Post processing of products:

1, annealing: eliminate residual stress;
2, humidity control: make the color, performance and size of plastic parts stable.

Advantages and disadvantages of injection molding:

Advantages: it can be made of special ceramic materials with special size and small size and can be mass produced.

Disadvantages: unable to make large size products.