PET foam sheet continuous extrusion production line
A foamed sheet and production line technology, which is applied to household appliances, other household appliances, flat products, etc., can solve the problems of reduced PET sheet molding quality, short cooling time of PET sheet, poor cooling effect, etc., to achieve stable shape, Improve the quality of the factory, improve the effect of quality
Active Publication Date: 2022-04-19
NANJING CHUANGBO MACHINERY
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Problems solved by technology
[0003] However, in the existing PET sheet production line, the PET sheet is usually cut and packed after extrusion molding, so that the cooling time of the PET sheet is too short, and the contact area with the air is concentrated on the upper surface of the PET sheet. Therefore, the cooling effect is poor, which will lead to a decrease in the final molding quality of the PET sheet
Method used
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Embodiment
[0039]Embodiment: a kind of PET foam sheet material continuous extrusion production line, as figure 1 and figure 2 , including an automatic feeding mechanism 1, an extrusion mechanism 2, a transverse cutting machine 5, a cooling turning frame 4 and a double-sided planer 81, and the materials are transported to the extrusion mechanism 2 through the automatic feeding mechanism 1 for mixing, heating and extruding After the foamed board is cut into foamed boards by the horizontal cutting machine 5, it enters the cooling and turning frame 4 to cool for more than 2 hours, and finally the foamed board enters the double-sided planer 81 for planing and milling to form the final product and output.
[0040] like figure 1 , the automatic feeding mechanism 1 includes a vacuum feeder 11 and a loss-in-weight scale 12 positioned below the vacuum feeder 11, and the material of the vacuum feeder 11 enters the extrusion mechanism 2 after being weighed by the loss-in-weight scale and is mixed...
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The invention discloses a PET foam sheet continuous extrusion production line, which includes an automatic feeding mechanism, a solid additive side feeding system, a multi-channel physical foaming agent filling system, a drying-free system, and a multi-stage melt pressurization system. Melt homogenization system, split output-co-current molding die, materials are mixed and extruded by twin-screw extruder + single-screw extruder, and connected to the melt cooling system. The foamed board produced by the combined system enters the cooling forming system, which includes a multi-roller cooling and flattening system, a cooling idler system and an auxiliary traction system, a side shaping and transverse cutting system, and a multi-stage cooling and turning frame. Double-sided shaping system with grinding and planing functions. The technical effects are: PET raw materials can directly enter the extrusion system without drying treatment without reducing the viscosity of the material, the vacuum degree can be adjusted, the melt cooling rate is easy to control, different types of physical foaming agents can be used and the addition amount can be accurately controlled, Foam boards of different densities are produced.
Description
technical field [0001] The invention relates to the field of foam board production, in particular to a PET foam board continuous extrusion production line. Background technique [0002] PET sheet has excellent air tightness, durability and chemical resistance; good transparency, does not produce any toxic gas when burned, has high environmental protection, and meets the food hygiene requirements of the US Food and Drug Administration (FDA) and Japan's Ministry of Health and Welfare It has become the safest material for food; it can be used for various processing, display or display, vacuum forming and other purposes. As a packaging material, PET has the following advantages: good mechanical properties, high tensile strength and impact strength, good folding resistance; good barrier properties, oil resistance, fat resistance, resistance to dilute acids, dilute alkalis, and most solvents; Excellent high and low temperature resistance, can be used for a long time in the temper...
Claims
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IPC IPC(8): B29C48/07B29C48/885B29C48/285B29C48/76B29C48/25B29C69/00B29K67/00B29L7/00
CPCB29C48/07B29C48/885B29C48/285B29C48/76B29C48/25B29C48/0022B29C69/001B29K2067/003B29L2007/002
Inventor ζδΈη
Owner NANJING CHUANGBO MACHINERY