1, injection molding process description: mold is a tool for the production of plastic products. The utility model is composed of a plurality of sets of parts. Injection molding, mold clamping in injection molding machine, the molten plastic is injected into the molding cavity, and cooling in the cavity shape, and then die down to separate out the system through the top products from the top of the left mold cavity, the mold is closed again for the next injection, the injection molding process is carried out of the cycle.
2, general definition of mold: in industrial production with a variety of special tools, presses and presses installed in the through pressure on the metal or non-metallic materials to produce the required shape parts or products, this special tool referred to as mold.
3, the general classification of mold: plastic mold and plastic mold can be divided into:
(1) non plastic mold: casting mold, forging die, stamping die, die casting, etc..
A. casting mold - faucet, pig iron platform
B. forging die body
C. stamping die - computer panel
D. die casting die - superalloy, cylinder body
(2) according to the production process and production of plastic products, plastic mold is divided into:
A. injection molding mold - TV shell, keyboard buttons (most commonly used)
B. blowing mould - beverage bottle
C. compression molding, bakelite switch, science bowl dish
D. transfer molding die - integrated circuit products
E. extrusion molding - glue tube, plastic bag
F. hot forming mold - transparent molding packaging shell
G. rotary molding -- soft toy doll
The injection molding is the most commonly used method in the processing of plastics. This method is applicable to all parts of thermoplastic and thermosetting plastics, the number of plastic products obtained large than other forming methods, as one of the main tools of injection mold injection molding processing, production efficiency and the level of quality in accuracy, manufacturing cycle and injection molding process, directly affect the cost and the product quality, yield, update, and also determines the response ability and speed in the market competition.
The injection mold is composed of a plurality of plate with various parts, basically divided into:
A forming device (die, punch)
B positioning device (guide column, guide sleeve)
C fixing device (L, die hole)
D cooling system (water)
E constant temperature system (heating pipe, heating wire)
F runner system (Jack Tsui hole channels, channel hole)
G ejector system (thimble, ejector rod)
5, according to the different types of gating system can be divided into three types of mold:
(1) water mouth mold: runner and gate in the parting line, and the product in the mold with mold release, the design is simple, easy to process, the cost is low, so many people use water mouth system operation.
(2): small inlet die runner and gate are not at the parting line, directly on the product, so to design a set of nozzle parting line, design is more complex, processing more difficult, usually depending on the product requirements and selection of fine water system.
(3): this kind of hot runner mold mold structure and fine nozzle is roughly the same, the biggest difference is the flow in one or more of the constant temperature hot runner plate and heat pump mouth, no cold material stripping, runner and gate directly on the product, so the channel need not release, this system also called nozzle the system, which can save raw materials, suitable for raw materials more expensive, higher requirements of products, design and processing difficulty, high cost of mold.
Hot runner system, also known as hot runner system, mainly by the hot runner, hot runner plate, temperature control box. Our common hot runner system has two forms: single point hot runner and multi-point hot runner. Single point hot runner is a single heat gate directly to the molten plastic into the cavity, which is suitable for plastic mould cavity single single gate; multipoint hot runner hot runner plate by molten material to the branched heat gate again into the cavity, it is suitable for single cavity multi point feeding or multi cavity mold.
Long power precision tooling (Hongkong) Co., Ltd
Dongguan wins Electronic Technology Co., Ltd.
Address: Dongguan city Changan town of Sha Jiang Pui Xinle Road No. 15
Telephone: 0769-85315080
Fax: 0769-85315046
Contact: Manager Du
Mobile: 13925868557
Email: duyanhui@js-dg.com
Email: jiusheng@js-dg.com