JPH0319946Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a pulverization apparatus for pulverizing used plastic molded articles.

[Conventional technology]

Conventionally, for example, soft drink containers and liquor containers made of foamed or non-foamed polyethylene terephthalate, cups, trays, hamburger containers and yogurt containers made of polystyrene or polypropylene, food containers made of multilayer plastic sheets, and egg containers. Plastic molded products with a thickness of about 0.2 to 1 mm are often used as packaging materials for food and drink products, such as polyvinyl chloride blister packages for commercial use, milk containers and soft drink containers made of laminated paper and plastic.

These plastic molded products are designed to have a certain strength and restoring force, for example by being filled with inorganic materials as fillers.
When discarding plastic molded products after use, it is practically difficult to manually compress them to break or shrink them. Therefore, the above-mentioned plastic molded products are usually disposed of as they are, but in this case, the plastic molded products to be discarded are bulky, and it is also difficult to load the plastic molded products when they are loaded onto a transport vehicle and transported to an incineration plant or a disposal site. The disadvantage was that efficiency decreased.

By the way, conventionally, when disposing of leftover food, etc.
Various compression processors for compressing these have been proposed. Such compression processing machines are also used to dispose of plastic molded products such as food and drink containers, but since the plastic molded products mentioned above are thin, when discarding them, they must be compressed using a compression processing machine. It is more preferable to cut or crush the material.

Therefore, conventionally, a crushing processing apparatus has been proposed in which used plastic molded products are crushed by a crushing blade. This type of pulverization processing equipment includes, for example, as disclosed in Japanese Utility Model Publication No. 54-41422.
There is a method in which the sheet waste is first cut into strips using a grooved roll and a round blade, and then cut into small pieces using a toothed roll. Furthermore, as disclosed in Japanese Patent Publication No. 60-26687, there is a method in which expanded polystyrene is first roughly crushed in a coarse crusher and then finely crushed in a fine crusher.

[The problem that the idea aims to solve]

However, in the former configuration, cutting is first performed using a grooved roll and a round blade, so although it is suitable for crushing sheet-like molded products, it is suitable for crushing three-dimensional plastic molded products. cannot be reliably crushed.

In addition, in the latter configuration, although the rotating blades of the coarse crusher installed in the previous stage can bite and crush square-shaped polystyrene foam, for example, the surface is smooth and the three-dimensional shape, such as a container with a cylindrical external shape, is used. A lightweight plastic molded product having sufficient restoring force has a problem in that it is difficult to grasp the tight grip on the circumferential surface, and it is difficult to crush it reliably. Note that this point also applies to the former configuration.

[Means to solve the problem]

In order to solve the above-mentioned problems, the crushing processing apparatus for plastic molded products according to the present invention is provided with a crushing means for crushing and cutting the plastic molded products by biting them between a pair of rotating bodies. The following measures have been taken in the pulverization processing equipment.

That is, in the preceding stage of the above-mentioned pulverizing means, there is provided a pressure feeding means for feeding the plastic molded article toward the pulverizing means and pressing it against the pulverizing means.

[Effect]

According to the above configuration, the plastic molded product introduced into the present crushing processing apparatus is sent toward the crushing means by the pressure feeding means and is pressed against the crushing means. As a result, even if a lightweight plastic molded product with a smooth surface, a three-dimensional shape, such as a cylindrical container shape, and sufficient restoring force is introduced, the plastic molded product will be crushed. It is caught between both rotating bodies of the means and crushed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in FIG. 1, the pulverization processing apparatus includes an upper case 1a and a lower case 1b that are separable from each other, and the upper case 1a has a lid that covers an opening 1c for introducing used plastic molded products. 2 is attached so that it can be opened and closed. The lid body 2 is configured to be opened and closed in conjunction with a pedal 3 disposed on the outside of the lower case 1b. A belt conveyor 4 is disposed within the upper case 1a adjacent to the lid 2, and the belt conveyor 4 is adapted to convey the plastic molded product introduced therein in the direction of arrow A.

A plurality of protrusions 5a for hooking plastic molded products are provided at an upper position on the back side of the belt conveyor 4.
A rotary blade 5 as a pressure feeding means equipped with ...5a is arranged so as to be rotatable in the direction of arrow B. A guide member 6 is provided on the back side of the rotary blade 5 to guide the plastic molded product toward a coarse crusher 7, which will be described later, while preventing the plastic molded product from escaping upward. The rotary blade 5 is
The plastic molded products conveyed by the belt conveyor 4 are fed into a coarse crusher 7 in fixed quantities along the guide member 6 and the belt conveyor 4.

A coarse pulverizer 7 as a pulverizer is arranged below the rotary blade 5. As shown in FIG. 2, the coarse crusher 7 has rotary blades 8a and 9 that have a shape similar to a sprocket and have acute-angled tooth tips.
It is equipped with a pair of rotary blade groups 8 and 9 formed by connecting a plurality of rotary blades 8a and 9a in the axial direction via spacers 8b and 9b, respectively, and each of the rotary blades 8a and 9a in the rotary blade groups 8 and 9 as rotating bodies is A narrow gap is formed at the tip and side of the blade corresponding to the spacers 9b and 8b on the other side. Each rotary blade 8a is rotationally driven in the C direction, while each rotary blade 9a is rotationally driven in the D direction.
A plastic molded product is inserted between a and 9a, and the plastic molded product is crushed and cut to achieve coarse pulverization.

Below the coarse crusher 7, a chute 10 or a guide is arranged so as to be inclined to become lower as it moves away from the coarse crusher 7, and a downwardly bent pressing part 10a is integrally provided at the lower end of the chute 10. It is provided.

A pulverizer 11 is disposed in front of the pressing part 10a, and the chute 10 is configured to transport the coarsely crushed pieces of the plastic molded product coarsely pulverized by the pulverizer 7 to the pulverizer 11 side by its own weight. It's summery.
The rotary blade 12 of the pulverizer 11 is rotatably supported in the E direction, and is configured to pulverize coarsely pulverized pieces of a plastic molded product while pressing them against the pressing portion 10a. Since the coarsely crushed pieces are coarsely crushed and flattened by the coarse crusher 7, they can be easily bitten into the fine crusher 11, so the rotary blades 12 of the fine crusher 11 can be used, for example, on a lawn mower. It is possible to use a grinder that generates little noise during grinding, such as one that has a plurality of spiral rotating blades, such as those used for cutting carpet hair. In addition, rotary blade 1
In order to more smoothly engage the plastic molded product into the rotary blade 12, the rotary blade 12 may be provided with an appropriate notch.

A storage box 13 is installed below the pulverizer 11, and a plurality of flexible bags 14 made of synthetic resin are stacked and set in the storage box 13. A motor 15 is installed in the inner part of the upper case 1a, and the belt conveyor 4, rotary blade 5, coarse crusher 7, and fine crusher 11 are driven in conjunction with the motor 15.
The motor 15 is arranged below the pedal 3, and a switch 16 is operated in response to the pedal 3 depression operation.
Alternatively, it is started and stopped by a timer (not shown).

In the above configuration, when a used plastic molded product is introduced through the opening 1c of the upper case 1a, the plastic molded product is conveyed in the direction A by the belt conveyor 4, and then quantified by the rotary blade 5. It is sent to a coarse crusher 7, where it is coarsely crushed. In this case, both rotating blade groups 8, 9
may be rotated at the same rotational speed, or the rotational speeds of both rotary blade groups 8 and 9 may be made different to enhance the shearing effect on the plastic molded product. As mentioned above, the plastic molded product is reliably fed into the coarse crusher 7 by the rotary blade 5 and pressed against the coarse crusher 7, so that
Plastic molded products do not accumulate on the coarse crusher 7, and the coarse crushing work is carried out smoothly. On the other hand, in conventional crushing processing equipment that is not equipped with a rotary blade 5 for feeding, a lightweight plastic with a smooth surface, a three-dimensional shape, for example a cylindrical container shape, and sufficient restoring force is used. Since the molded product is not easily bitten by the crushing blade and tends to float on top of the crushing blade, smooth crushing cannot be carried out.

The coarsely crushed pieces of the plastic molded product coarsely crushed by the coarse crusher 7 are conveyed downward by the chute 10, reach the fine crusher 11, and are finely crushed by the rotary blade 12 while being pressed by the pressing part 10a. Ru. The pulverized plastic molded product falls into the innermost flexible bag 14 in the storage box 13 and is deposited there, and is processed while being sealed inside the flexible bag 14. The volume of the plastic molded product after being pulverized by the above-mentioned device is, for example, about 1/5 to 1/10 of the original volume.

In the above embodiment, only one pulverizer 11 was used, but in order to make the pulverized pieces of the plastic molded product even smaller, two pulverizers 11 were provided, and the pulverization was divided into two stages. You can also do that.

[Effect of idea]

As described above, the apparatus for pulverizing plastic molded articles according to the present invention is equipped with a pressure feeding means for feeding the plastic molded article in the direction of the crushing means and pressing it against the crushing means, upstream of the crushing means.

As a result, even a lightweight plastic molded product with a smooth surface, a three-dimensional shape, such as a cylindrical container shape, and sufficient restoring force, can be reliably caught between the two rotating bodies of the crushing means. It has the effect that it can be crushed and crushed.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention. FIG. 1 is an explanatory diagram showing the overall configuration. FIG. 2 is a cross-sectional view of the main part. 5... Rotating blade (pumping means), 7... Coarse crusher (pulverizing means), 8, 9... Rotating blade group (rotating body), 1
0...Chute, 11...Fine crusher, 13...Storage box.

Claims (1)

[Scope of Claim for Utility Model Registration] In an apparatus for crushing plastic molded products, which is equipped with a crushing means for crushing and cutting a plastic molded product by biting it between a pair of rotating bodies, the plastic molded product is 1. An apparatus for crushing plastic molded products, comprising a pressure feeding means for feeding the plastic molded product toward the crushing means and pressing it against the crushing means.