JP5350302B2 - Mannequin manufacturing method - Google Patents

Description

  The present invention relates to a mannequin manufacturing method for manufacturing a mannequin by blow molding.

  Conventionally, the manufacturing method of a mannequin puts a polyethylene resin into a hopper, and supplies the polyethylene resin from the hopper into a screw built-in pipe. The polyethylene resin is melted and agitated in the screw built-in tube and sent to the injection chamber. The polyethylene resin in the injection chamber is injected from the gap between the dies into the mold to form a molten hollow body. When the mold is closed and compressed air is sent into the molten hollow body by the nozzle, the molten hollow body expands and contacts the inner surface of the mold. When cooled in this state, the polyethylene resin is cured and a mannequin is formed, the mold is divided, the mannequin is taken out, and the burr is removed to complete.

  Mannequins manufactured by conventional manufacturing methods are molded from petroleum-derived thermoplastics, so they are treated as industrial waste and cannot be easily disposed of, and carbon dioxide generated during disposal Since global warming gas increases in large quantities, it is not very favorable for the natural environment. From this point of view, the applicant of the present application has proposed a method for manufacturing a mannequin doll made of biomass resin that can be disposed of as general waste instead of industrial waste, and that is free from carbon dioxide during disposal and is friendly to the natural environment. (Patent Document 1).

  The manufacturing method of the mannequin doll proposed by the applicant of the present application described above is to apply a biomass thermosetting resin solution to the inner surfaces of the base material front mold and the rear mold, and then paste a biomass sheet, and further biomass thermosetting to this biomass sheet. A mannequin doll is formed when the front and back molds are overlapped by applying the functional resin solution, the front mold and the back mold are overlapped, and the front and back molds are removed after curing. .

Japanese Patent Application No. 2009-92609

  The mannequin doll manufactured by the above-described manufacturing method proposed by the applicant of the present application can be disposed of as general waste, generates little harmful substances and carbon dioxide generated in the disposal, and is therefore friendly to the natural environment. However, this mannequin doll manufacturing method is cumbersome because it is performed manually, and it requires skill such as uniform coating technology and coating technology to a predetermined thickness. There was a problem that could not be done.

  The present invention has been devised in view of the above problems, and an object of the present invention is to provide a mannequin manufacturing method by which anyone can easily manufacture a mannequin made of biomass resin.

Mannequins manufacturing method of the present claim 1 wherein, in order to achieve the above object, a mannequin manufacturing method for manufacturing by blow molding, from 5 to 85 wt% shells material and 15-95 wt% of a polyethylene resin The biomass resin pellets are sent from the hopper to the screw built-in tube, the biomass resin pellets are heated and melted in the screw built-in tube, and the melted biomass resin is transferred to the injection chamber while stirring with the screw. After the resin is heated to 180 ° C to 190 ° C, which is the appropriate melting temperature for the shell material, it is injected into a mannequin mold to form a molten hollow body, and compressed air is blown into the molten hollow body to expand the molten hollow body. With the inner surface of the mannequin mold and the molten hollow body in contact with the inner surface of the mannequin mold. It is characterized by manufacturing a mannequin.

  According to the manufacturing method of the mannequin which concerns on this invention, there exists an effect that anyone can manufacture the mannequin which consists of biomass resin easily by blow molding. The mannequin manufactured by the method for manufacturing a mannequin according to the present invention can be disposed of as general waste, and generates less harmful substances and carbon dioxide generated in the disposal, and thus has an effect of being friendly to the natural environment.

It is sectional drawing which shows the 1st process of the manufacturing method of the mannequin which concerns on this invention. It is sectional drawing which shows the 2nd process of the manufacturing method of the mannequin which concerns on this invention. It is sectional drawing which shows the 3rd process of the manufacturing method of the mannequin which concerns on this invention.

  A manufacturing apparatus for manufacturing the mannequin M by blow molding will be described. As shown in FIG. 1, the manufacturing apparatus 1 includes a hopper 2 that accumulates a resin material, a screw built-in pipe 6 that is sent to the injection chamber 11 while melting the resin material, a mold 16 for molding the mannequin M, It consists of a nozzle 23 that feeds compressed air into the mold 16. The hopper 2 has an inclined surface 5 that is inclined toward the opening of the mouth portion 3, the mouth portion 3 is connected to the screw built-in tube 6, and the internal resin material is fed into the screw built-in tube 6 by its own weight. Yes.

  The screw built-in pipe 6 is provided with a screw 7. The screw 7 is configured to rotate in one direction by a drive motor 9 and power transmission means 10 such as a pulley. The screw built-in tube 6 is heated by means (not shown) to heat and melt the internal resin material. The tip of the screw built-in tube 6 is connected to the side surface of the injection chamber 11, and the resin material melted in the screw built-in tube 6 is stirred by the screw 7 and transferred into the injection chamber 11.

  The lower part of the injection chamber 11 is open, and a disk-shaped die 12 is provided at the lower part. The resin material is further heated in the injection chamber 11, and the resin material is injected into the mold 16 in a cylindrical shape from the gap 13 between the die 12 and the injection chamber 11 to form a molten hollow body 17. A piston may be provided in the injection chamber 11 and the resin material may be injected by the piston. The mold 16 includes an anterior half body 19 and a posterior half body 20, and as shown in FIG. 2, the anterior half body 19 and the posterior half body 20 are joined to form a mannequin female die 21 therein. In the mold 16, when the front half body 19 and the rear half body 20 are separated from each other, a molten hollow body 17 of the resin material injected from the injection chamber 11 is formed between the front half body 19 and the rear half body 20. An insertion hole 25 is formed in the lower part of the mold 16 so that the tip of a nozzle 23 that feeds compressed air into the mold 16 protrudes into the mold 16.

  As shown in FIG. 1, when the manufacturing apparatus 1 puts and accumulates a resin material in the hopper 2, the resin material in the hopper 2 is sent to the screw built-in pipe 6. The resin material sent into the screw built-in pipe 6 is heated and melted to become a fluid, and is stirred by the screw 7 rotated by the drive motor 9 and sent into the injection chamber 11. The resin material sent into the injection chamber 11 is further heated and injected into the mold 16 through the gap 13 between the die 12 and the injection chamber 11 into a cylindrical shape to form a molten hollow body 17. At this time, the mold 16 is separated from the front half 19 and the rear half 20. As shown in FIG. 2, when the front half body 19 and the rear half body 20 are joined to form a mannequin female die 21 and compressed air is fed into the molten hollow body 17 by the nozzle 23, the molten hollow body 17 expands. Then, it is pressed against the mannequin female die 21. When the mold 16 is cooled, the resin material is cured and the mannequin M is molded. As shown in FIG. 3, the mannequin M in the mold 16 can be taken out by separating the mold 16 into a front half 19 and a rear half 20.

  As described above, the resin material in the case where the mannequin is manufactured by blow molding is a biomass resin composed of 5 to 95% by weight of a biomass material and 5 to 95% by weight of a thermoplastic resin, and is a granulated pellet. The pellets are sent from the hopper 2 to the screw built-in pipe 6, the biomass resin pellets are heated and melted in the screw built-in pipe 6, and the biomass resin is transferred into the injection chamber 11 while being stirred by the screw 7. In the injection chamber 11, the biomass resin is heated to an appropriate melting temperature of the biomass material, and then injected into the mannequin mold 16 to form the molten hollow body 17. Next, compressed air is blown into the molten hollow body 17, the molten hollow body 17 is expanded and brought into contact with the inner surface of the mannequin mold 16, and the molten hollow body 17 is cooled while being in contact with the inner surface of the mannequin mold 16. Mannequin M is produced by solidification.

  The proper melting temperature is the optimum melting temperature when blow molding a thermoplastic resin. If it is too high, the viscosity will be low and drawdown will be large, and if it is too low, the viscosity will be high and prone to molding defects. Become. The proper melting temperature varies depending on the material. The appropriate melting temperature is 170 ° C to 180 ° C for polyethylene resin, 165 ° C to 170 ° C for rice of biomass material, and 180 ° C to 190 ° C for shell material of biomass material. is there. Further, the weight ratio of the biomass resin is 51% by weight or more for the biomass material and 49% by weight or less for the thermoplastic resin from the viewpoint of increasing the generation of carbon dioxide accompanying the disposal and disposal as general household waste. It is desirable that

  When the resin material is only a polyethylene resin as described above, the proper melting temperature is 170 ° C. to 180 ° C., but the biomass is composed of 5 to 95 wt% biomass material and 5 to 95 wt% thermoplastic resin. When it is a resin, it is preferable to melt at an appropriate melting temperature of the biomass material.

  For example, the melting temperature in the case of a biomass resin composed of 5 to 85% by weight of rice material and 15 to 95% by weight of polyethylene resin is 165 ° C to 170 ° C, which is an appropriate melting temperature of rice material. When the melting temperature is 170 ° C. to 180 ° C., which is the same as that of the polyethylene resin, the viscosity is too low and the drawdown becomes large.

  Moreover, the melting temperature in the case of the biomass resin which consists of 5-85 weight% shell material and 15-95 weight% polyethylene resin is 180 degreeC-190 degreeC which is an appropriate melting temperature of shell material. If the same melting temperature as polyethylene resin is 170 ° C to 180 ° C, the viscosity is too high to cause molding failure and perfect blow molding cannot be performed, and if it is 190 ° C or higher, the viscosity is too low and drawdown increases. This is not preferable because the burden on the manufacturing apparatus increases.

  In addition, the biomass material which comprises biomass resin is not limited to a rice material and a shell material, You may be large sawdust of trees, such as powders, such as corn and sugarcane, and cedar. Further, the thermoplastic resin is not limited to a polyethylene resin, and may be a polypropylene resin. Mannequin M blow-molded with biomass resin has a thickness of about 2 mm to 10 mm, has sufficient strength, expresses the smell and color peculiar to biomass materials, and does not need to be colored. Can be exhibited.

  The present invention is applicable to a manufacturing apparatus for manufacturing a mannequin made of biomass resin by blow molding.

M Mannequin 1 Manufacturing Equipment 2 Hopper 3 Portion 5 Inclined Surface 6 Screw Built-in Pipe 7 Screw 9 Drive Motor 10 Power Transmission Means 11 Injection Chamber 12 Die 13 Clearance 16 Mold (Mannequin Die)
17 Melted hollow body 19 First half body 20 Second half body 21 Female mannequin mold 23 Nozzle 25 Insertion hole

Claims (1)

A manufacturing method of a mannequin manufactured by blow molding,
5-85 wt% of the shell material and the biomass resin pellets consisting of 15 to 95 wt% of a polyethylene resin feed from the hopper to the screw internal tube,
In the screw built-in tube, the biomass resin pellets are heated and melted, and the melted biomass resin is transferred to the injection chamber while stirring with a screw.
In the injection chamber, the biomass resin is heated to 180 ° C. to 190 ° C. which is an appropriate melting temperature of the shell material, and then injected into a mannequin mold to form a molten hollow body.
Compressed air is blown into the molten hollow body, the molten hollow body is expanded and brought into contact with the inner surface of the mannequin mold,
A mannequin manufacturing method comprising manufacturing a mannequin by cooling and solidifying a molten hollow body in contact with an inner surface of a mannequin mold.

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