JP2002234076A - Method for fusing synthetic resin-mixed molded body and carrying pallet manufactured by fusing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for fusing by which synthetic resin-mixed molded body molded from waste materials in which different kinds of synthetic resins such as thermoplastic resins and thermosetting resins are mixed are integrally bonded together and to provide a strong carrying pallet manufactured by the method for fusing. SOLUTION: The carrying pallet consists of a pair of top and bottom deck plates 1 and 2 molded of a synthetic resin and a plurality of cylindrical column members 3 made of a synthetic resin and both end parts of the column members are respectively brought into contact with the deck plates and the column members are rotated at a high speed to fuse the both end parts of the column members on the deck plates by frictional heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fusing a synthetic resin mixed molded article formed from waste materials in which different kinds of synthetic resins such as thermoplastic resins and thermosetting resins are mixed, and to be manufactured by the fusion. The present invention relates to a transport pallet.

[0002]

2. Description of the Related Art A large amount of synthetic resin waste generated from used synthetic resin packaging containers or end-of-life bumpers, battery cases, and other synthetic resin products includes polyvinyl chloride, polyethylene, polypropylene, nylon, acrylonitrile, and polystyrene. , Polyamide, polyester, urethane, epoxy, phenol and other thermoplastic or thermosetting synthetic resin materials, or their copolymer resins are mixed together. It is a mixture of foreign objects. Conventionally, such synthetic resin waste materials have different melting temperatures for each material, and thus it has been difficult to supply a known injection molding machine to form a recycled molded product. Therefore, it was considered impossible to recycle unless the materials were separated. However, since advanced separation technology is required for separation and the cost is high, most of such synthetic resin waste is conventionally dumped into a disposal site as industrial waste. In addition, even if such synthetic resin waste is incinerated, there is a problem in that a toxic gas having a strong odor is generated and the air is polluted.

Therefore, the present inventor has already disclosed in Japanese Patent Laid-Open No. 10-15 / 1998.
1332, as disclosed in Japanese Patent Application Laid-Open No. 10-151629, a synthetic resin waste material in which a plurality of types of synthetic resin materials are mixed is stirred by a mixing device equipped with high-speed rotating blades, and friction generated due to the stirring. It is melted by heat to form a gel, which is loaded into a molding machine as it is to form a molded product, so that even synthetic resin waste mixed with various synthetic resin materials can be recycled into useful molded products without the need for separation. By inventing a method that can be molded, the cost required for separation as described above is reduced, and the recycling of synthetic resin waste is promoted.

[0004] The synthetic resin-mixed molded article molded by this method is resistant to impact and has sufficient mechanical strength, but it is difficult to join the molded articles by heat fusion or an adhesive. Therefore, there is a problem that the use is limited.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a fusion bonding method capable of firmly and integrally joining such synthetic resin mixed molded articles, and a solid fusion method manufactured by the fusion bonding method. A pallet for transportation is provided.

[0006]

For this purpose, the method for fusing a synthetic resin-mixed molded article of the present invention comprises contacting molded articles made of synthetic resin with each other and rotating one of the molded articles at a high speed. It is characterized in that both molded bodies are fused by frictional heat. Further, the present invention is characterized in that in the above-mentioned method for fusing a synthetic resin mixed molded article, the molded article is molded from a waste material in which different kinds of synthetic resins are mixed. Further, the transport pallet of the present invention is composed of a pair of upper and lower deck plates formed of a synthetic resin, and a plurality of cylindrical column members made of a synthetic resin. By rotating the column member at a high speed, both ends of the column member are fused to the deck plate by frictional heat. Further, the present invention is characterized in that, in the transport pallet, an annular groove is formed in a portion facing the deck plate, and an end of the column member is loosely fitted in the annular groove to rotate the column member at high speed. I do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with respect to a pallet for transportation. As shown in an exploded perspective view in FIG. 1, this transport pallet includes a pair of upper and lower deck plates 1 and 2 and a plurality of cylindrical column members 3. These deck plates 1 and 2 are obtained by pulverizing various synthetic resin waste materials obtained from waste materials into an appropriate size and throwing them into a mixing device, and stirring the blades in the mixing device by rotating the blades at a high speed by a motor. The temperature is raised by the frictional heat caused by the agitation, melted into a gel with moderate softness, and while it is in the melted state, it is charged into a mold of a pressure molding machine and molded into a square plate. By this molding, as shown in FIG. 2, the annular grooves 4 are respectively formed in the center portions of the deck plates 1 and 2 and in opposing portions near the outer edges.
The lower deck plate 2 has windows 5 formed in a lattice shape, and a through hole 6 is formed at the center of each annular groove 4.

Each of the column members 3 is formed of a synthetic resin waste material or a new synthetic resin similarly to the deck plates 1 and 2, and a partition plate 7 is integrally formed inside the column member 3, as shown in FIG. Next, an engagement hole 8 is formed in the partition plate.

To assemble the transport pallet, as shown in FIG. 4, a motor 11 is provided on a table 10 on which the deck plate 2 can be placed horizontally, and a fork is attached to the tip of a rotating shaft 12 of the motor. The lower end of the column member 3 is loosely fitted in each annular groove 4 of the deck plate 2, and the upper end of the column member 3 is loosely fitted in each annular groove 4 of the deck plate 1. Then, the rotating shaft 12 is projected from the through hole 6 into the column
Is engaged with the engaging hole 8 of the column member 3 and the motor 11 is driven while appropriately applying a load P to the deck plate 1 to rotate the column member 3 at a high speed of about 1800 rpm. By this high-speed rotation, frictional heat is generated due to friction between both ends of the column member 3 and the inner surface of the annular groove 4, and the resin is melted and fused by rotating the column member 3 for about 15 seconds, so that the transportation as shown in FIG. Pallets are assembled, and there is a space between the deck plates 1 and 2 where a fork of a forklift can be inserted.

[0010] Thus, fusion by frictional heat can be integrally fixed with high strength without difficulty even if different kinds of synthetic resins are mixed. For this reason, it is possible to manufacture a product which can sufficiently withstand use even if molded from a material having relatively poor physical properties such as a regenerated synthetic resin, such as being able to sufficiently withstand severe use conditions as a transport pallet.

[0011]

As described above, the embodiment has been described.
According to the method for fusing a synthetic resin mixed molded body according to the present invention,
Since it is possible to firmly and integrally join a molded article formed from waste materials in which different types of synthetic resins are mixed, the use of recycled synthetic resins can be increased and recycling can be promoted. In addition, there is a beneficial effect that a transportation pallet of excellent quality can be easily manufactured from synthetic resin waste.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a transport pallet showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a disassembled state of the transport pallet according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a longitudinal sectional view showing a process of manufacturing the transport pallet according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a transport pallet showing an embodiment of the present invention.

[Explanation of symbols]

 1, 2 deck plate 3 pillar member 4 annular groove 8 engagement hole 11 motor 12 rotation shaft 13 engagement tool

Claims (4)

[Claims] 1. A synthetic resin mixed molded article characterized in that molded articles formed of a synthetic resin are brought into contact with each other and one of the molded articles is rotated at a high speed to fuse the two molded articles by frictional heat. Fusing method. 2. The method for fusing a synthetic resin mixed molded article according to claim 1, wherein the molded article is molded from a waste material in which different kinds of synthetic resins are mixed. 3. A pillar member comprising a pair of upper and lower deck plates formed of a synthetic resin and a plurality of cylindrical pillar members made of a synthetic resin, wherein both end portions of the pillar members are brought into contact with the deck plate, respectively. A pallet for transportation characterized in that both ends of said column member are fused to a deck plate by frictional heat by rotating at a high speed. 4. An annular groove is formed in a facing portion of the deck plate,
4. The pallet for transportation according to claim 3, wherein the end of the column member is loosely fitted in the annular groove to rotate the column member at high speed.