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Hot smelting and coating process of cylindrical plastic sheet

A technology of plastic sheet and hot welding, applied in toys, entertainment, other household appliances, etc., can solve the problems of increased manufacturing cost, lack of ductility, time-consuming and labor-intensive, etc., to improve productivity, good appearance, reduce The effect of failure rate

Inactive Publication Date: 2003-02-26
TOMY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vinyl chloride has excellent ductility and does not have any problems in "circular winding" processing, while dechlorinated vinyl materials that replace it have materials that lack ductility and are difficult to "circular winding"
The reason for this is that since the operation of "ring winding" takes time and effort in the outward winding operation of materials lacking in ductility, there is a problem that time and labor costs increase, and the proportion of production costs in vinyl chloride products increases.

Method used

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  • Hot smelting and coating process of cylindrical plastic sheet
  • Hot smelting and coating process of cylindrical plastic sheet
  • Hot smelting and coating process of cylindrical plastic sheet

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0026] figure 1 A three-dimensional view of an inflatable doll manufactured by the thermal welding method of the present invention. 1 is the body, 2 is the head, 3 is the arm, and 4 is the leg.

[0027] The above-mentioned doll is made of PP (polypropylene), and the head 2, arm 3 and leg 4 are bonded to the body 1 by heat welding.

[0028] Hereinafter, a method of thermally welding the arm portion 3 to the body portion 1 by ultrasonic sealing will be described.

[0029] The body part 1 and the arm part 3 are respectively formed by overlapping two PP sheets a and sealing them with heat. figure 2 As shown, the curved middle portion 3a and the root-side end portion 3b of the arm portion 3 are not sealed beforehand. Thus, the arm part 3 is formed into a cylindrical shape from the intermediate part 3a to the end part 3b. Furthermore, the end portion 3b is formed to shrink in area beforehand, and the diameter decreases toward the end portion. When using a material with good d...

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Abstract

A method for heat-welding for a plastic sheet member formed in a cylindrical shape onto other plastic sheet is excellent in appearance and prevents inside air from leaking out even if a little is formed at welding. The method is provided with following two requirements: a cylindrical heating jig 7 of a heat-welder is to be inserted into the inside of the plastic sheet member; the end part 3b at the welding side of the cylindrical plastic sheet member is bent inwards of the heating jig, and the heating jig 7 in this state is made to abut against other plastic sheet member to be welded together with the end part 3b of the welding side to perform heat-welding.

Description

technical field [0001] The present invention relates to a heat welding method, in particular, of heat welding a tubular plastic sheet to another plastic sheet. Background technique [0002] In the processing of the existing inflatable plastic dolls, when the arms are attached to the body or the head is attached to the body, it is carried out by the "ring winding" processing method. [0003] "Toroidal winding" processing method is as follows Figure 8 As shown in (a), the cylindrical vinyl chloride sheet a1 is inserted into the inner side of the cylindrical metal heating jig 7, and fixed by winding the front end 10 from the end of the heating jig 7 to the outer surface, After being in contact with the other vinyl chloride sheet a2, the heating jig 7 is heated by high frequency or ultrasonic waves, and the protruding portion 10 of the vinyl chloride sheet is welded to the other plastic sheet a2. [0004] However, this "ring winding" welding method has the problem that the wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A63H9/00B29C65/02B29C65/20B29L22/02B29L31/52
CPCB29C66/71
Inventor 五十岚嘉久半田启明
Owner TOMY CO LTD