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Extrusion moulding, colouring and grain-making technique of plastic shaped material

A technology of extrusion molding and special-shaped materials, which is applied in the field of plastic extrusion molding, can solve the problems of monotonous line pattern, monotonous pattern, complex process, etc., and achieve significant economic benefits, realistic imitation wood patterns, and obvious social benefits Effect

Inactive Publication Date: 2004-10-27
包赟元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are mainly two types of coloring and patterning techniques in the existing extrusion molding technology: 1. Set the wide and narrow flow channels in the extrusion mold to make the speed of the material flow forward differently, thereby producing patterns, but due to the flow of the mold The contrast of the compression ratio in the channel is not large, and the pattern making effect is not ideal; 2. The uneven lines are set in the cavity of the forming mold to produce stripes. This technology can only produce very monotonous line patterns.
The above two coloring and graining techniques, the pattern is monotonous, and the effect of color depth and layering is poor, so it is impossible to achieve a good imitation wood effect
In order to improve the product grade, many manufacturers adopt printing, film and other methods for secondary processing, but due to the limitation of pad printing technology, the effect is always very different from the natural wood grain, and the process is complicated and expensive. It is difficult for the product to be recognized and accepted by users, which leads to the fact that white products without patterns are still the main products

Method used

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  • Extrusion moulding, colouring and grain-making technique of plastic shaped material
  • Extrusion moulding, colouring and grain-making technique of plastic shaped material
  • Extrusion moulding, colouring and grain-making technique of plastic shaped material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add appropriate amount of coloring material to the material. Set the control channel section and the graining device at the junction of the filter plate outlet of the extruder head and the mold inlet, wherein the control channel section is the cross-sectional area of ​​the through hole of the control channel section: the through hole at the entrance of the normal channel section Cross-sectional area = 1: 1.5, the pattern groove opened on the control channel section is triangular in shape. The produced profile plane produces a wood-like pattern with a short pattern length.

Embodiment 2

[0014] Add appropriate amount of coloring material to the material. On the outlet section of the filter plate of the extruder head, the control flow channel section and the pattern making device are arranged, wherein the control flow channel section is the through hole cross-sectional area of ​​the control flow channel section: the through hole cross-sectional area at the entrance of the normal flow channel section = 1:5, a groove is set in the control flow channel section, and the shape of the groove is semicircular. The produced profile plane produces imitation wood patterns with longer pattern lengths.

Embodiment 3

[0016] Add appropriate amount of coloring material to the material. On the die inlet section of the extruder head, the control flow channel section and the pattern making device are arranged, wherein the control flow channel section is the through hole sectional area of ​​the control flow channel section: the through hole sectional area at the entrance of the normal flow channel section = 1:10, set grooves in the control flow channel section, the shape of the grooves is a combination of triangle and trapezoid. The produced special-profile plane produces a pattern with a combination of multiple patterns and a strong sense of stripes.

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Abstract

The colouring grain-making technique for extrusion-formed shaped plastic material is characterized by that in the outlet of filtering plate of extruding machine head or die inlet stage a controllable flow passage portion and grain-making device are set, in which the sectional area of through hole of the controllable flow passage portion is small, its pressure is large and flow speed is quick, and the ratio of sectional area of through hole of the controllable flow pasage portion and sectional area of through hole of normal flow passage portion is 1:1.5-10, so that the grain-making device can be used for making grain grooves on the controllable flow passage portion, its grain groove form can be semi-circular, rectangular, trapezoidal, triangle and their combination.

Description

technical field [0001] The invention relates to a new technology of coloring and patterning for extrusion molding of plastic profiled materials, and belongs to the technical field of plastic extrusion molding. Background technique [0002] With the development of society, the continuous improvement of people's living standards and the gradual enhancement of environmental awareness, plastic profiles have been widely recognized and used in daily life due to their unique practicability (such as plastic doors and windows, interior decoration profiles, etc.), The replacement of wood with plastic, which has been advocated for decades, has become a reality. However, due to the immature coloring and patterning process technology in the existing extrusion molding technology, the plastic profile is still mainly white, and the decorative effect is monotonous, which is far from meeting the needs of users. Due to the influence of thousands of years of culture, people's interest in wood ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/30
Inventor 包赟元
Owner 包赟元