The composition and function of the vacuum vacuum molding machine add time

Composition and function of the vacuum vacuum molding machine, clamping equipment of plastic forming, sheet is fixed in the clamping device. In hot forming of universal and composite thermoforming machine used more easily fixed sizes sheet clamping device. Have a plenty of the whole machine with a set of clamping frame. Clamping device can be divided into two kinds: one kind is frame type, another kind is split type. Frame type clamping device is composed of upper and lower two frameworks. Sheet between two frameworks. Framework opens, under the framework of the general will remain fixed. The lower part of the various types of simplex on a machine frame fixed on the molding room directly. Parison and finished by hand out on the manual and semi-auto machine, when the frame size is very big, there are within the scope of the framework to open the safe operation of device. The larger parison forming glide, clamping force can in a relatively wide range adjustment, therefore, the two bags rubber roller, with mutual compression spring, and is equipped with a pressure adjusting device. Continuous's clamping piece molding machine is the zipper on both sides with the front and rear brake work together. Had better use the automatic control clamping device, in order to action quickly, can help to improve product quality and efficiency. Second, vacuum heating thermoplastic plastic sheet and film forming process, one of the main process is the sheet heating. Electric heating duration and quality of structure depends on the heater, the surface temperature after radiation heat transfer of thermal inertia, the distance between the sheet and heater, radiation absorption coefficient and features on the surface of the heater and thermal physical properties of materials. Commonly used radiator heater electric heater, crystal and infrared heater. Vacuum system consists of vacuum pumps, vacuum equipment and storage tanks, valves, piping, and vacuum gauge, etc, used in vacuum forming separate type vacuum pump, this pump vacuum should reach 0. 7 ~ 0. 09 Mpa（ 520mmHg） The above. Gas-holder is generally with sheet steel welded cylindrical box, bottom is elliptical. The capacity of the storage tank should be at least half than maximum molding chamber capacity. You must have appropriate valves, vacuum tubes, to control the vacuum narrow capacity. The rotation of the vacuum pump power is determined by the big small molding equipment and molding speed, larger or molding equipment commonly used to 2 - fast 4 kw. The central vacuum system of large factory production and development of the specific requirements. Four, compressed air equipment pneumatic system by the machine itself with the compressor, storage tanks, workshop director path sets, valve, etc. Molding machine need pressure to zero. 4 - 0. 5 mpa compressed air, widely used in all kinds of vacuum plastic molding machine piston type air compressor. You can also use large supply of screw air compressor whole factory. Compressed air in addition to the large should be in shape, and when the part is used for stripping, the early products of outside such as cooling and manipulation of the mold frame and operation sheet parts movement. Five, the cooling equipment to improve production efficiency, vacuum forming products before release the cooling is often required. Ideally in contact with the mould parts of the inner surface and outer surface cooling, had better use the built-in cooling coil and mold. For the metal mold, such as wood, plaster, glass fiber reinforced plastic, epoxy resin, such as mold, unable to use water, can use air cooling, and add water to cool the outer surface of the vacuum forming parts. In the production of annealing parts can be obtained if adopt natural cooling, to improve the impact resistance of parts. On the stresses in the water cooling, although high production efficiency, product is bigger. Six, stripping equipment release is to remove products from mold, die and punch, usually most of the occasion was due to shrinkage products cooling and against mould, so by vacuum attract air hole or the opposite direction to release. Especially for draft of small or die mold, at the same time using demoulding mechanism against or volatile stripper, sometimes on the sheet and daub on mould release agent or mold surface spray teflon treatment. Seven, vacuum molding machine control equipment control system generally includes vacuum forming of vacuum molding and finishing process, including instruments, meters, pipe, valves, various parameters and the movement control. Manual and electric - control way Mechanical automatic control, computer control, concrete is chosen according to the initial investment and labor, technical requirements, the raw material cost, production and maintenance of equipment cost factors such as comprehensive consideration.