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Continuous extrusion production line for PET foamed sheet

A foamed sheet and production line technology, which is applied to flat products, household appliances, other household appliances, etc., can solve the problems of short cooling time, poor cooling effect, and reduced PET sheet molding quality, and improve the quality of delivery. , improve the quality, the effect of stable shape

Active Publication Date: 2020-12-18
NANJING CHUANGBO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Continuous extrusion production line for PET foamed sheet
  • Continuous extrusion production line for PET foamed sheet
  • Continuous extrusion production line for PET foamed sheet

Examples

Experimental program
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Effect test

Embodiment

[0039]Example: A continuous extrusion line for PET foamed board, such asfigure 1 withfigure 2 , Including an automatic feeding mechanism 1, an extrusion mechanism 2, a transverse cutting machine 5, a cooling and turning frame 4, and a double-sided planer 81. The material is conveyed to the extrusion mechanism 2 through the automatic feeding mechanism 1 for mixing, heating and extrusion The foamed board is cut into foamed board by the transverse cutting machine 5 and then enters the cooling and turning rack 4 to cool for more than 2 hours. Finally, the foamed board enters the double-sided planer 81 for planing and milling to form the final product and Output.

[0040]Such asfigure 1 , The automatic feeding mechanism 1 includes a vacuum feeding machine 11 and a weightlessness scale 12 located below the vacuum feeding machine 11. The material of the vacuum feeding machine 11 is weighed by a weightlessness scale and then enters the extrusion mechanism 2 for mixing, thereby ensuring The a...

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PUM

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Abstract

The invention discloses a continuous extrusion production line for a PET foamed sheet. The production line comprises an automatic feeding mechanism, a solid additive side feeding system, a multi-pathphysical foaming agent filling system, a drying-free system, a multi-stage melt pressurization system, a melt homogenizing system and distributed outputting and converged forming molds. Materials aresubjected to double-step mixing extrusion by a double-screw extruder and a single-screw extruder and are connected with a melt cooling system. A foamed sheet produced by the combined system enters a cooling forming system, and the cooling forming system comprises a multi-roller cooling flattening system, a cooling carrier roller system, an auxiliary traction system, a side edge shaping and transverse cutting system, a multi-stage cooling overturning frame and a double-face shaping system with grinding and planing functions. The production line has the technical effects that PET raw materials can directly enter an extrusion system without drying treatment, the viscosity of the materials is not reduced, the vacuum degree is adjustable, the melt cooling rate is easy to control, different types of physical foaming agents can be adopted, the addition amount is accurately controlled, and the foamed sheets with different densities are produced.

Description

Technical field[0001]The invention relates to the field of foamed board production, in particular to a continuous extrusion production line for PET foamed board.Background technique[0002]PET sheet has excellent air tightness, durability and chemical resistance; good transparency, will not produce any toxic gas when burned, has high environmental protection, and meets the US Food and Drug Administration (FDA) and Japan's Ministry of Health and Welfare Food Sanitation The legal standard 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, resistance to oil, fat, dilute acid, dilute alkali, and most solvents; Excellent resistance to high and low temperature performance, can be used for a long time in the temperature range of -40...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/07B29C48/885B29C48/285B29C48/76B29C48/25B29C69/00B29K67/00B29L7/00
CPCB29C48/07B29C48/885B29C48/285B29C48/76B29C48/25B29C48/0022B29C69/001B29K2067/003B29L2007/002
Inventor 李东生
Owner NANJING CHUANGBO MACHINERY
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