Method for producing a thermoplastic resin article
A technology of thermoplastic resin and plastic resin, which is applied in the direction of transportation and packaging, vehicle parts, etc., and can solve problems such as leakage of molten thermoplastic resin
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0109] As for the foaming agent used in the production of the foamed sheet, either of a chemical foaming agent or a physical foaming agent can be used. Furthermore, both types of blowing agents can be used together. Examples of chemical blowing agents include known thermally decomposable compounds such as those that generate nitrogen gas by their decomposition (e.g., azodicarbonamide, azobisisobutyronitrile, dinitrosopenta Methylenetetramine, p-toluenesulfonylhydrazide, p,p'-oxy-bis(benzenesulfonylhydrazide)); and thermally decomposable inorganic blowing agents (such as sodium bicarbonate, ammonium carbonate, and ammonium bicarbonate) . Specific examples of physical blowing agents include propane, butane, water and carbon dioxide gas. Among the foaming agents provided above as examples, water and carbon dioxide are suitably used because the deformation of the foamed sheet due to secondary foaming during the heating process of vacuum forming is small, and these agents are ine...
Embodiment 1
[0119] A foamed polypropylene sheet having an expansion ratio of 3 and a thickness of 3 mm (SUMICELLER manufactured by Sumika Plastech Co., Ltd. ) is molded into the shape of the door trim. Using the obtained foamed polypropylene sheet (1) molded into the shape of the door trim, using figure 1 The shown method produces thermoplastic resin articles. Mold A (3) used in the following procedure is a mold having a molding face having a door trim structure, which is the same as that of the male die for molding the foamed sheet (1). The molding surface has air vents and recesses (5) for forming ribs with a width of 2.5 mm and a height of 10 mm as functional components. In the mold there is a conduit (4) through which molten thermoplastic resin can be fed into the recess. Mold B ( 6 ) is paired with mold A ( 3 ), and it has a molding face corresponding to one face (front face) of a foamed thermoplastic resin sheet molded in the shape of a door trim. While mold A (3) and mold B (6)...
Embodiment 2
[0122]Using a foamed polypropylene sheet (SUMICELLER manufactured by Sumika Plastech Co., Ltd.) with an expansion ratio of 3 and a thickness of 3 mm, the figure 2 The shown method produces thermoplastic resin articles. Mold C (10) used in the following procedure has a molding face that can form the back of the door trim. The molding surface has air vents and recesses (5) for forming ribs with a width of 2.5 mm and a height of 10 mm as functional components. Die D (11) has a molding surface that can form the front face of the door trim. The molded face has air extraction holes. While mold C (10) and mold D (11) were in use, their temperatures were adjusted to 60°C.
[0123] The foamed polypropylene sheet (9), which had been fixed in a vacuum forming machine equipped with an extruder (VAIM0301 manufactured by Satoh Machinery works, Co., Ltd.) In the clamp (2) of the sheet, it was softened by heating with an infrared heater so that the temperature of the surface of the sheet...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More