Overview
injection molded products produced piece. This method is the most common in the industrial processing of most thermoplastics. Him, but far less frequently, it is also used for the manufacture of parts of some species thermosets. The main advantages of injection molding are: universality by type of recyclable plastics, high performance operation of an automated process, the high accuracy of the products, the ability to manufacture parts very complex geometric shapes unattainable using any other technology.
In addition, injection molded articles reinforced produce, hybrid, hollow, multi-colored, foaming of plastics and other. The method allows to mold the product weight from a gram to tens of kilograms. There are examples of pressure-cast parts production wristwatches mechanisms (weight 0,006 g), window frames, and even fragments of bathrooms come with a reinforcement (weight 150 kg).
Organic feature of the method is its cyclicity that generally hinders the performance of this process in comparison with continuous technologies. In principle, the essence of the injection molding technology is as follows: polymer melt is produced and accumulated in the material to a molding machine cylinder further supplied to the interlocking shape. Further, material with a node joins a cylinder shape, a kneader axial movement moves at a certain speed in the melt form. As a result of the axial movement of the worm shape is filled with the molten resin material, and is replaced by a kneader to the end position. Next, the melt solidifies in the form of (cured or – in case of thermosets) to form a solid product. Material cylinder remains in the closed position forms with the system. In this situation, the worm begins to rotate, produces and conveys the melt material in the front cylinder area thus moves back. After accumulating the required volume of the melt screw rotation stops. It covers an initial position for further action. After completion of the hardening process (curing) plastic form is opened and the product is removed from it. To facilitate removal of the product material to the cylinder may move away from this point, the node shape. Further, the injection molding cycle is repeated.
From the foregoing it follows a number of key provisions that define not only the process technology and device equipment and tooling. These include the following:
1. The design of the injection molding machine must include: a block of melt preparation and submission of the form (injection unit); locking block (and opening) form a pressing device with the slider (clamping unit); drive unit, which provides all kinds of movement of equipment and accessories of mobile devices; injection molding machine control device that implements the required sequence of interaction blocks, power and kinematic assemblies, as well as temperature, speed, load parameters to ensure optimum equipment operation mode.
2. Injection molding machines are complex and costly devices, saturated with modern technical solutions.
3. The use of injection molding machines for the realization of die casting technology requires qualified feasibility study, the main elements of which are: krunotirazhnost and geometric complexity of the product, availability and adequacy of technological, physical, mechanical and performance properties of the polymer material selected for production.
- packing products
- closures
- Pallet production
- Containers
- Enclosures and accessories
- Car accessories
- Cases and accessories for instruments and tools
- Common consumption goods
- Products for floriculture
- Articles for the bathroom and toilet room
- Products for the kitchen
- Gardening Supplies
- Fittings and sanitary ware
- Fitting
- Reinforcement of water supply systems of buildings and constructions (plumbing fittings).
- Reinforcement of internal sewerage and drains.
- Medical products
- Injection syringes
- Furniture fittings
- Stationery
- Kids toys
- Transportation Toys
- Toys for the sandbox
- Toys for children up to 3 years
- Educational (logical) toys and games
- Sports games and toys
- Tools and devices musical toy
- Furniture
- Discs