The composition of the blister machine and its function
I. Clamping equipment When the plastic sheet is formed, the sheet is fixed on the clamping device. Clamping devices that facilitate the fixing of sheets of various sizes are often used in thermoformed general-purpose and composite thermoforming machines. Some are equipped with a clamping frame for the entire molding machine.
Clamping devices can be divided into two categories: one is frame type and the other is split type. The frame clamp consists of two frames, upper and lower. The sheet is sandwiched between the two frames. When the frame is opened, the lower frame generally remains fixed. The lower portion of the upper frame of each type of single station forming machine is directly fixed to the molding chamber. Manual and semi-automatic molding machines for hand-loading parisons and finished products are equipped with safety operating devices within the open range of the frame when the frame size is large. For parisons with large form slippage, the clamping force is required to be adjusted over a relatively wide range. For this purpose, two rubberized rolls are used, which are pressed against each other by a spring and equipped with a pressure regulating device. The clamping of the continuous pull forming machine is a combination of the two side zippers and the front and rear brakes.
The clamping device is preferably automatically controlled for quick action and can help improve part quality and efficiency.
Second, the heating equipment Thermoplastic sheet and film vacuum forming process, one of the main processes is sheet heating. The duration and quality of electrical heating depends on the structure of the heater, the thermal inertia of the temperature transfer after the surface is radiated, the distance between the sheet and the heater, the absorption coefficient of the radiant energy, the characteristics of the surface of the heater, and the thermophysical properties of the material. Commonly used heaters are electric heaters, crystal radiators, and infrared heaters.
3. Vacuum equipment The vacuum system consists of a vacuum pump, a gas storage tank, a valve, a pipeline and a vacuum gauge. In vacuum forming, a separate model vacuum pump is often used. The vacuum of such a pump should be above 0.07~0.09 Mpa (520 mmHg). The gas storage tank is generally a cylindrical case welded with a thin steel plate, and the bottom is elliptical. The capacity of the gas storage tank should be at least half the capacity of the largest molding chamber. Appropriate valves must be fitted to the vacuum line to control the narrow vacuum capacity.
The rotational power of the vacuum pump is determined by the size of the molding equipment and the forming speed. Equipment with a large or faster forming speed is usually as large as 2-4 KW. The size of the vacuum central system depends on the specific production and development requirements of the plant.
4. Compressed air equipment The pneumatic system can be composed of a compressor, a gas storage tank, a workshop main road set, and a valve. The molding machine requires compressed air with a pressure of 0.4-0.5 MPa, and various vacuum blister molding machines widely use piston air compressors. It can also be supplied by a large spiral air compressor.
In addition to a large amount of compressed air to be molded, there is also a part of the power for demolding, external cooling of the primary product, and manipulation of the mold frame and the running sheet.
5. Cooling equipment In order to improve production efficiency, vacuum blister molded products often need to be cooled before demolding. Ideally, both the inner and outer surfaces of the article in contact with the mold are cooled, and it is preferred to use a mold incorporating a cooling coil. For non-metal molds, such as wood, gypsum, fiberglass reinforced plastics, epoxy resin and other molds, because they can not be used for water cooling, air-cooling can be used, and water mist can be added to cool the outer surface of the vacuum-molded parts.
If natural cooling is used in production, annealed parts can be obtained, which is beneficial to improve the impact resistance of the parts. Although the production efficiency is high with water cooling, the internal stress of the workpiece is large.
6. Demoulding equipment Demoulding is to remove the product from the mold. Usually, whether it is a die or a punch, in most cases, the mold is pressed tightly due to the cooling shrinkage of the product, so the mold is released by vacuum suction or blowing in the opposite direction.
Especially for molds with a small draft or a concave mold, at the same time, using a demolding mechanism to collide or oscillate, sometimes a mold release agent or a mold surface is sprayed with a Teflon treatment on the sheet and the mold.
VII. Control Equipment The control system generally includes the control of various parameters and actions of instruments, meters, pipes and valves in the process of vacuum forming, finishing and so on. The control methods include manual, electric-mechanical automatic control, computer control, etc. The specific selection should be based on the initial investment labor costs, technical requirements, raw material costs, production and maintenance equipment costs and other factors.
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MOQ |
12.000pcs |
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Delivery time |
50-55days |
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Material |
AS,ABS |
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color |
Injection color,spray coating color and UV metalizing color |
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logo |
Silk screan and hot staping |
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Packing |
paper carton |
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Place of Origin |
Zhejiang |
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