JPH0670990U - Press equipment for recycling plastic molded products - Google Patents

Abstract

(57) [Abstract] [Purpose] A plastic container for food, beverage, pharmaceuticals, cosmetics, etc., that is, a plastic molding product recycling press device used for collecting and recycling plastic molded products after use. provide. [Structure] A conveyor mechanism 3 which is arranged over a gantry frame 2 and which conveys a plastic molded product A collected as waste at a constant speed, and heating which is arranged so as to cover the conveyor mechanism 3. The press device 1 includes a furnace 4, a hot press device 5 arranged behind the heating furnace 4 in the carrying direction, and a cold press device 6 arranged behind the hot press device 5. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plastic molding product recycling press used for collecting plastic containers for foods, beverages, pharmaceuticals, cosmetics and the like, that is, for collecting and recycling plastic molded products after use.

[0002]

[Problems to be solved by conventional techniques and devices]

 With the recent recognition of ecological (social and ecological products) such as limited resources and environmental protection, companies, consumers, and governments are increasingly interested in recycling issues, especially food, beverage, Attention is being paid to recycling plastic containers (plastic molded products) for pharmaceuticals and cosmetics after use.

By the way, when collecting and reusing this plastic molded product, it is necessary to avoid mixing of different kinds of plastics in order to deteriorate the quality of the plastics. It is necessary to separate them like polyvinyl chloride, polyethylene, polypropylene, etc.

Conventionally, as this separation method, an optical separation method utilizing transmission or reflection of X-rays, infrared rays, etc. has been generally performed. Examinations such as the obligation to display the mark are being made.

By the way, regarding the above-mentioned material indication mark, even if the mark indication is given, if there is a slight difference in quality such as each manufacturer, the quality of the collected and reused product is not constant. There is a problem. Therefore, as a more reliable method, the collected plastic molded products can be analyzed scientifically and objectively by using the above-mentioned optical separation method using transmission and reflection of X-rays and infrared rays. How to do it is necessary.

However, in the case of carrying out a scientific separation method such as the above-mentioned optical separation method, in the shape of the plastic molded product as it is, the measured value may have variations and errors, so that it is a thin plate and It is required that there be no irregularities on the surface.

In view of the above, according to the present invention, even when a scientific fractionation method such as an optical fractionation method utilizing transmission and reflection of X-rays and infrared rays described above is performed, variations and errors in measured values are caused. It is an object of the present invention to provide a device for converting a collected plastic molded article into a plastic having a thin plate shape and no unevenness on its surface so that such a phenomenon does not occur.

[0008]

[Means for Solving the Problems]

 The plastic molded article recycling press device according to the present invention comprises a conveying means for conveying the collected plastic molded articles, a heating means for preheating the plastic molded articles conveyed on the conveying means, and To form a thin plate by hot pressing a plastic molded article that has been preheated by the heating means, and further cold pressing the plastic molded article that has been hot pressed by the hot press means. The cold press means of

[0009]

[Action]

 With the press device for recycling plastic molded products according to the present invention having the above-mentioned configuration, the plastic molded products, which are containers for food, beverages, pharmaceuticals, cosmetics, etc. collected as waste, are transported by the transportation means, and during the transportation. In the heating means, the material is preheated to near the softening temperature. Then, the plastic molded article thus preheated is hot pressed at a softening temperature to a thin plate to some extent, and then further pressed by a cold pressing means to a thin plate to a desired thickness.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a schematic view showing a press device for recycling a plastic molded product of the present invention. In the figure, reference numeral 1 generally indicates a press device for recycling plastic molded articles of the present invention (hereinafter simply referred to as "press device").

The pressing device 1 is basically arranged over the gantry frame 2 and is a well-known steel belt conveyor mechanism 3 for conveying the plastic molded product A collected as waste at a constant speed. A heating furnace 4 arranged so as to cover the conveyor mechanism 3, a hot press device 5 arranged behind the heating furnace 4 and a rear part of the hot press device 5 in the conveying direction. It is composed of the cold press device 6 and the cold press device 6.

Here, the heating furnace 4 is erected on the gantry frame 2 so as to cover the conveyor 3 a of the conveyor mechanism 3. The heating furnace 4 is provided with a hot air outlet 4a therein and is connected to a well-known hot air generator 4b so that the hot air generated by the hot air generator 4b is blown out. There is. When the plastic molded product A passes through the heating furnace, the plastic molded product A is preheated to a temperature near the softening temperature. In the case of the present embodiment, the warm air heating means is adopted as the heating means, but it goes without saying that other heating means, for example, a known heating means such as heating with a heating wire can be adopted.

Further, the hot press device 5 is arranged on a frame 7 standing on the gantry frame 2. The hot press device 5 basically comprises a hot press cylinder 5a fixed to the frame 7 and a press die 5c fixed to the lower portion of the rod 5b of the cylinder 5a. A plurality of guide rods 5d are fixed to the end of the press die 5c, and the rods 5d are inserted and attached to a guide member 5e arranged on the gantry frame 2 to guide the guide member 5e. The inside is slid up and down, and the press die 5c is guided up and down as the rod 5b of the cylinder 5a projects. Further, a well-known electric heating device (for example, a sheath heater) (not shown) is arranged in the press die 5c to heat the press die 5c to a temperature above the softening point temperature of the plastic molded product A. Is configured to.

The plastic molded product A, which has been heated in advance to a temperature near the softening point by the heating furnace 4 in the previous step, is conveyed by the conveyor mechanism 3 to the position below the hot press device 5 and stopped at that position. At this time, the rod 5b of the hot press cylinder 5a, which is configured to move synchronously with the conveyor mechanism 3, projects downward, so that the press mold 5c fixed to the lower part of the rod 5b is used to form the plastic molded product A. Will be hot pressed, and will be a thin plate of plastic to some extent. Then, after this hot press is completed, the rod 5b of the hot press cylinder 5a returns upward, the die 5c moves upward, and is conveyed by the conveyor mechanism 3 to the cold press device 6 which is the next step. It has become.

The cold press device 6 has basically the same configuration as that of the hot press device 5 described above, except that the press die 5c is not provided with an electric heating device, and the same members include: Similar reference numbers are noted.

The plastic molded product A, which has become a thin plate-like plastic to some extent by the hot press device 5 in the previous step, is conveyed to below the cold press device 6 by the conveyor mechanism 3 and stops there. Then, the rod 6b of the cold press cylinder 6a, which is configured to move synchronously with the conveyor mechanism 3, projects downward, so that the plastic mold A is pressed by the press die 6c fixed to the lower portion of the rod 6b. It will be cold pressed at room temperature, and it will be a thin plate-like plastic with a desired thickness. After the cold press is completed, the rod 6b of the cold press cylinder 6a returns to the upper side, the die 6c moves upward, and the conveyer mechanism 3 conveys it to the discharging device 8. .

In the present embodiment, both press devices 5 and 6 are mold press type press devices, but it is of course possible to use rotary roller type press devices.

[0019]

[Effect of device]

 According to the pressing device according to the present invention, the X-ray separation method, which is a separation method required when a plastic molded article, which is a container for food, beverage, medicinal cosmetics, etc. collected as waste, is reused, Even when carrying out scientific separation methods such as optical separation methods that use the transmission and reflection of infrared rays, etc., the collected plastic molded products can be easily and in large quantities in the form of thin plates with unevenness on the surface. Since it is possible to use plastics that do not include plastics, there is no variation in measurement values, errors, etc., and the efficiency of collecting and reusing plastic molded products is increasing. The place is huge.

Further, since the plastic pressed by using this device is press-molded into a thin plate shape, it should be finally buried or discarded in the ground such as a landfill as in the past. Even when forced to do so, it is possible to make it compact when transporting it, and it is extremely convenient, such as convenient handling and space saving during underground burial work. .

[Brief description of drawings]

FIG. 1 is a schematic view of a press device for recycling a plastic molded product of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressing device 2 ... Frame frame A ... Plastic molded product 3 ... Conveyor mechanism 3a ... Conveyor 4 ... Heating furnace 4a ... Warm air blowing port 4b ... Warm air generating device 5 ... Hot pressing device 5a ... Hot pressing cylinder 5b ... Rod 5c ... press mold 5d ... guide rod 5e ... guide member 6 ... cold press device 6a ... cold press cylinder 6b ... rod 6c ... press mold 7 ... frame 8 ... discharging device

Claims (1)

[Scope of utility model registration request] 1. A press device for recycling plastic molded articles, comprising: a conveying means for conveying the collected plastic molded articles, and a heating means for preheating the plastic molded articles conveyed on the conveying means. A hot-pressing means for hot-pressing the plastic molded article that has been preheated by the heating means, and a plastic-molded article hot-pressed by the hot pressing means, further cold-pressed into a thin plate shape. A cold-pressing device for recycling plastic molded articles, which is characterized by comprising: