JP2010089469A - Manufacturing apparatus and manufacturing method for synthetic resin product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus for a synthetic resin product which can efficiently manufacture the synthetic resin product made of a synthetic resin waste material. <P>SOLUTION: This manufacturing apparatus 1 includes: a mixing apparatus 3 which has a blade member rotatably installed in a chamber, and forms a gel-like substance by stirring and melting the synthetic resin waste material which is thrown into the chamber by the blade member; a press apparatus 4 which has a plurality of molding sections 35 and 36, and molds a plurality of press-molded articles 40 and 40 by simultaneously pressurizing the gel-like substance respectively thrown into the plurality of molding sections; and a carrying-throwing in apparatus 5 which carries the gel-like substance formed by the mixing apparatus 3 and discharged from the chamber to the press apparatus 4, and throws the gel-like substance into each of the plurality of molding sections. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a synthetic resin product manufacturing apparatus and manufacturing method, and more particularly to a synthetic resin product manufacturing apparatus and manufacturing method capable of efficiently manufacturing a synthetic resin product made of synthetic resin waste.

Large amounts of synthetic resin waste from used plastic packaging containers, scrap car bumpers, battery cases, and other synthetic resin products are polyvinyl chloride, polyethylene, polypropylene, nylon, acrylonitrile, polystyrene, polyamide, polyester, Various thermoplastic or thermosetting synthetic resin materials such as urethane, epoxy, phenol, etc., or copolymer resins of these are mixed, and metal, wood pieces, glass pieces, fiber scraps, and other contaminants are mixed. It will be.
Since the synthetic resin waste material has various melting temperatures for each material, it has been difficult to form a recycled molded product by supplying it to a known injection molding machine, for example. Therefore, it was considered impossible to recycle unless sorted by material. However, since a high level of separation technology is required for the separation and the cost is high, conventionally, most of the above synthetic resin waste is dumped in a disposal site as industrial waste. In addition, even if the above synthetic resin waste is incinerated, there is a problem that harmful gases with a strong odor are generated and the atmosphere is polluted.

Therefore, as a mixing device that solves the above-described problem, a synthetic resin waste material that has a blade member that is rotatably provided in the chamber and rotates the synthetic resin waste material that is put into the chamber is rotated at high speed (for example, the tip speed of the blade is 15 to 40 m). (Patent Document 1), for example, has been proposed in which a gel-like material is generated by stirring and melting with a blade member to be discharged from the chamber.
In the above-mentioned Patent Document 1, the mixing device and the press device are used in combination, and the gel-like material discharged from the chamber of the mixing device is put into a molding part of the press device, and the press molding is performed as a single press molding. It is disclosed to obtain a product.

JP 11-291248 A

However, in the above-mentioned Patent Document 1, the press device has one molding part, and a single press-molded product is obtained by the press device from a single gel-like material discharged from the chamber of the mixing device. As a result, production efficiency was relatively poor.
Moreover, in the said patent document 1, the maximum production amount of one gel-like thing is decided according to the chamber capacity | capacitance of the said mixing apparatus, and the production amount of the gel-like thing in a mixing apparatus is press molding in a press apparatus. If it is smaller than the molding amount of the product, the production efficiency will be extremely poor. For example, when the chamber capacity is 40 liters and the maximum amount of gel-like material produced at one time is about 12 kgf, if you want to obtain a press-molded product of about 16 kgf with a pressing device, the mixing device will give a gel-like shape of about 8 kgf. It is necessary to form a product twice, and to put the gel-like material of the two times into the molding part of the press device, and then to mold a press molded product of about 16 kgf in the molding unit of the press device.

  This invention is made | formed in view of the said present condition, and it aims at providing the manufacturing apparatus and manufacturing method of a synthetic resin product which can manufacture efficiently the synthetic resin product which consists of synthetic resin waste materials.

The present invention is as follows.
1. A mixing device that has a blade member rotatably provided in the chamber and generates a gel-like material by stirring and melting the synthetic resin waste material charged into the chamber;
A press device that has a plurality of molding parts and simultaneously presses the gel-like material charged into each of the plurality of molding parts to mold a plurality of press-molded products;
A synthetic resin product comprising: a feeding device that transports the gel-like material generated by the mixing device and discharged from the chamber to the press device and feeds the gel-like material into each of the plurality of molding units. Manufacturing equipment.
2. From the start of discharging the gel-like material generated first among the plurality of gel-like materials generated by the mixing device to the completion of charging into one molding portion of the plurality of molding portions. A time interval (T1) and a time interval (T2) from the start of discharging the gel-like material to be generated later from the inside of the chamber to the completion of charging into the other one of the plurality of molding parts The above-mentioned 1. further comprising a control device for controlling the transporting device so that the ratio (T1 / T2) exceeds 1. The manufacturing apparatus of the synthetic resin product of description.
3. The mixing device includes a hopper that is connected to the chamber and stores synthetic resin waste, an open / close lid that opens and closes a material input port formed in the hopper, and an open / close drive source that drives the open / close lid to open and close And 1. a control unit that controls the open / close drive source so that the synthetic resin waste is divided into a plurality of times in the chamber. Or 2. The synthetic resin product manufacturing apparatus described in 1.
4). The blade member is rotatable by a motor,
The control unit includes the number of rotations (N1) of the blade member when the synthetic resin waste material that is divided and fed first is divided among the plurality of divided inputs of the synthetic resin waste material, and the synthetic resin waste material that is divided and fed later. The motor can be controlled such that the ratio (N1 / N2) to the rotational speed (N2) of the blade member when stirring is greater than 1. The manufacturing apparatus of the synthetic resin product of description.
5). The transport input device has a robot and a container provided at the tip of a robot arm constituting the robot, and the container is driven by the discharge chute connected to the material discharge port of the chamber. 1. Located above the lower opening so as to block the lower opening. To 4. The manufacturing apparatus of the synthetic resin products as described in any one of these.
6). The container has a heat insulating structure. The manufacturing apparatus of the synthetic resin product of description.
7). The welding apparatus further includes a welding device that superimposes and welds the surfaces of the pair of press-molded products of the plurality of press-molded products molded by the press device, and the welding device includes a stack of the pair of press-molded products. The above-mentioned 1. having a pressing member capable of pressing the combined outer peripheral surface. To 6. The manufacturing apparatus of the synthetic resin products as described in any one of these.
8). A mixing step of introducing a synthetic resin waste material into a chamber of a mixing apparatus, and stirring and melting the synthetic resin waste material by a blade member rotated in the chamber to generate a gel-like material;
A transporting and feeding step of transporting the gel-like material generated in the mixing step and discharged from the chamber to a press device and feeding it to each of a plurality of molding parts of the press device;
A method of manufacturing a synthetic resin product, comprising: a pressing step of simultaneously pressing the gel-like material charged into each of the plurality of molding parts in the conveying and feeding step to mold a plurality of press-molded products.
9. In the carrying-in process, one of the plurality of molding units from the start of discharge of the gel-like material generated first among the plurality of gel-like materials generated by the mixing device from the chamber. Time interval (T1) until completion of charging, and time from the start of discharge of the gel-like material to be generated later into the other molding part among the plurality of molding parts 7. The ratio (T1 / T2) to the interval (T2) is greater than 1. The manufacturing method of the synthetic resin product of description.
10. In the mixing step, the synthetic resin waste material is introduced into the chamber divided into a plurality of times. Or 9. A method for producing a synthetic resin product according to 1.
11. In the mixing step, the number of rotations (N1) of the blade member when stirring the synthetic resin waste material that is dividedly charged first among the plurality of divided charging operations of the synthetic resin waste material, and the synthetic resin waste material that is dividedly charged later 10. The ratio (N1 / N2) to the rotational speed (N2) of the blade member when stirring is more than 1. The manufacturing method of the synthetic resin product of description.
12 In the carrying-in process, the lower opening portion is configured such that a container provided at the tip of the robot arm constituting the robot closes the lower opening portion of the discharge chute connected to the material discharge port of the chamber by driving the robot. 8 above, which is located immediately below. To 11. The manufacturing method of the synthetic resin product as described in any one of these.
13. The container has a heat insulating structure. The manufacturing method of the synthetic resin product of description.
14 The method further comprises a welding step of superposing and welding the surfaces of the pair of press-formed products of the plurality of press-formed products formed by the pressing step, and in the welding step, the pair of press-formed products are stacked. The above-mentioned 8. It is welded in a state where the outer peripheral surfaces of the mating surfaces are pressed. Thru 13. The manufacturing method of the synthetic resin product as described in any one of these.

According to the synthetic resin product manufacturing apparatus of the present invention, the synthetic resin waste material put into the mixing device chamber is stirred and melted by the blade member to generate a gel-like material, which is generated by the mixing device and discharged from the chamber. The gel-like material is transported to the press device by the transport-feeding device and is fed into each of the plurality of molding units, and the gel-like material placed in each of the plurality of molding units of the press device is simultaneously pressed to thereby press the plurality of presses. A molded product is formed. As described above, since a plurality of press-formed products can be obtained at the same time with one press device, a synthetic resin product made of synthetic resin waste can be efficiently manufactured.
In addition, the ratio (T1 / T2) of the time interval (T1) of the gel-like material generated earlier by the mixing apparatus and the time interval (T2) of the gel-like material generated later is more than 1. In the case of further comprising a control device for controlling the transfer charging device, the charging time of the previously generated gel-like material to the predetermined molding portion is set to the charging timing of the gel-like material generated later to the other predetermined molding portion. Can be approached. As a result, it is possible to obtain a plurality of press-molded products with less variation in quality by suppressing the supercooling of the gel-like material previously charged into the predetermined molding part.
Further, when the mixing device has a hopper, an opening / closing lid, an opening / closing drive source, and a control unit, the mixing device is divided into a plurality of times in the chamber by opening / closing control of the opening / closing lid by the control unit. Since the resin waste material is supplied, the synthetic resin waste material can be additionally supplied after the synthetic resin waste material already charged in the chamber starts to melt. As a result, the rotational resistance of the blade member in the chamber is reduced, and the melting of the synthetic resin waste material to be added later is promoted, so that the ability to generate a gel-like material in the mixing apparatus can be increased.
The blade member is configured to be rotatable by a motor, and the control unit is configured to rotate the synthetic resin waste material that has been divided and charged before the synthetic resin waste material. The motor can be controlled such that the ratio (N1 / N2) between the rotational speed (N1) and the rotational speed (N2) of the blade member when stirring the synthetic resin waste material to be divided and charged later exceeds 1. In this case, it is possible to suppress the load applied to the mixing device when the synthetic resin waste material is additionally charged while suppressing the decrease in the ability to generate the gel-like material in the mixing device.
In addition, the transport input device has a robot and a container provided at the tip of the robot arm constituting the robot, and the container is directly below the lower opening so as to close the lower opening of the discharge chute. In the case of positioning, if the gel-like material previously generated by the mixing device and discharged from the chamber is put into the container via the discharge chute, the container is held in a predetermined waiting time in that state, Supercooling of the gel-like material in the container can be suppressed more reliably.
Moreover, when the said container has a heat insulation structure, the supercooling of the gel-like substance in a container can be suppressed further reliably.
Further, when the welding apparatus further includes a welding device and the welding device has a pressing member, the pair of press-molded products that are overlaid on each other are welded in a state where the overlapping outer peripheral surface is pressed by the pressing member. And the generation of burrs on the outer peripheral surface can be suppressed. Moreover, since the surface area of the welding part in an outer peripheral surface spreads by the press of a press member, the welding intensity | strength of a pair of press molded product can be raised.

According to the method for producing a synthetic resin product of the present invention, the synthetic resin waste material introduced into the chamber of the mixing apparatus is stirred and melted by the blade member to generate a gel-like material, which is generated by the mixing apparatus and discharged from the chamber. The gel-like material is conveyed to the press device and is put into each of the plurality of molding parts, and the gel-like material put into each of the plurality of molding parts of the press device is simultaneously pressed to form a plurality of press-formed products. Is done. As described above, since a plurality of press-formed products can be obtained at the same time with one press device, the production efficiency of the synthetic resin product formed from the synthetic resin waste material can be improved.
Moreover, in the said conveyance injection | throwing-in process, ratio (T1 / T2) of the time interval (T1) of the gel-like thing produced | generated previously and the time interval (T2) of the gel-like thing produced | generated later exceeds 1. In this case, the time when the gel-like product generated earlier is put into the predetermined molding part can be made closer to the time when the gel-like product generated later is put into another predetermined molding part. As a result, it is possible to obtain a plurality of press-molded products with less variation in quality by suppressing the supercooling of the gel-like material previously charged into the predetermined molding part.
Further, in the mixing step, when the synthetic resin waste is divided into a plurality of times in the chamber, the synthetic resin waste is additionally charged after the synthetic resin waste already charged in the chamber starts to melt. be able to. As a result, the rotational resistance of the blade member in the chamber is reduced, and the melting of the synthetic resin waste material to be added later is promoted, so that the ability to generate a gel-like material in the mixing apparatus can be increased.
Further, in the mixing step, the number of rotations (N1) of the blade member when the synthetic resin waste material that is dividedly charged first among the plurality of divided inputs of the synthetic resin waste material is stirred, and the synthetic material that is dividedly charged later When the ratio (N1 / N2) with the rotation speed (N2) of the blade member when the resin waste material is agitated exceeds 1, the synthesis is performed while suppressing a decrease in the ability to generate a gel-like material in the mixing device. It is possible to suppress the load applied to the mixing device when additional resin waste is added.
Further, in the transfer charging step, the lower part of the discharge chute connected to the material discharge port of the chamber is closed by the container provided at the tip of the robot arm constituting the robot by driving the robot. When it is located directly under the open part, the gel-like material previously generated by the mixing device and discharged from the chamber is put into the container through the discharge chute, and the container is left in that state for a predetermined waiting time. If the position is maintained, overcooling of the gel-like material in the container can be more reliably suppressed.
Moreover, when the said container has a heat insulation structure, the supercooling of the gel-like substance in a container can be suppressed further reliably.
Furthermore, a welding process is provided, and in the welding process, when the overlapping outer peripheral surfaces of the pair of press-formed products are welded in a pressed state, generation of burrs on the outer peripheral surfaces can be suppressed. Moreover, since the surface area of the welding part in an outer peripheral surface spreads by the press of a press member, the welding intensity | strength of a pair of press molded product can be raised.

1. Synthetic resin product manufacturing apparatus The synthetic resin product manufacturing apparatus according to the present invention includes a mixing apparatus, a press apparatus, and a conveyance input apparatus described below. The synthetic resin product manufacturing apparatus can further include, for example, a control device and / or a welding device to be described later.
Examples of the synthetic resin products include pallets, carts, cushioning materials (dunnage), underfloor materials, civil engineering materials, agricultural materials, building materials, transportation materials, housing materials, general-purpose boxes, medical boxes, and electric wire drums. Can be mentioned.

The above-mentioned “mixing device” has a blade member rotatably provided in the chamber. As long as a synthetic resin waste material put into the chamber is stirred and melted by the blade member to generate a gel-like material, the structure and stirring The form, timing, etc. are not particularly limited. This synthetic resin waste is usually melted and gelled by frictional heat generated by stirring the blade member. Further, the structure, size, shape, material, quantity, mounting form, etc. of the blade member are not particularly limited.
Examples of the synthetic resin waste material include waste materials containing two or more of various resins such as polyvinyl chloride, polyethylene, polypropylene, nylon, acrylonitrile, polystyrene, polyamide, polyester, urethane, epoxy resin, and phenol resin. be able to. Furthermore, as other synthetic resin waste materials, for example, in addition to one or two or more of the above-mentioned various resins, one or two or more of cocoons of metal pieces, wood pieces, glass pieces, fiber scraps, etc. Examples include waste materials including miscellaneous materials.

  The mixing device includes, for example, a hopper that is connected to a chamber and stores a predetermined amount of synthetic resin waste material, an open / close lid that opens and closes a material charging port formed in the hopper, and an open / close drive source that opens and closes the open / close lid And a controller that controls the open / close drive source so that a predetermined amount of the synthetic resin waste material is divided into the chamber and divided into a plurality of times. For example, the open / close lid can be supported so as to be slidable or swingable with respect to the hopper. Examples of the opening / closing drive source include a cylinder and a motor. The predetermined amount of the synthetic resin waste material is intended to be an amount of the synthetic resin waste material corresponding to the amount of one-time gel-like product generated by the mixing apparatus.

  In the case of the above-described embodiment, for example, the blade member can be rotated by a motor, and the control unit agitates the synthetic resin waste material that is divided and fed first in a plurality of divided inputs of the synthetic resin waste material. The motor is controlled so that the ratio (N1 / N2) of the rotation speed (N1) of the blade member and the rotation speed (N2) of the blade member when stirring the synthetic resin waste material to be divided and charged later exceeds 1 Can be configured to be possible. From the viewpoint of further reducing the load applied to the mixing device, the rotation speed ratio (N1 / N2) is preferably 1.2 or more, particularly 1.3 or more, and more preferably 1.4 or more.

  As long as the above-mentioned “press device” has a plurality of molding parts and simultaneously presses the gel-like material charged into each of the plurality of molding parts to mold a plurality of press-molded products, its structure, press form, The timing is not particularly limited. For example, the press device can form a plurality of press-formed products by heating and compressing a gel-like material.

  As long as the above-mentioned "conveying device" conveys the gel-like material generated by the mixing device and discharged from the chamber to the press device and puts it into each of a plurality of molding parts, its structure, size, and conveying input form The timing is not particularly limited.

  The transport input device has, for example, a robot and a container provided at the tip of a robot arm constituting the robot, and the container is driven by a discharge chute connected to the material discharge port of the chamber. It can be positioned directly below the lower opening so as to block the lower opening (see FIGS. 3 and 5). Examples of the robot include a vertical articulated robot, a horizontal articulated robot, an orthogonal robot, and a parallel link robot. Of these, a vertical articulated robot is preferable from the viewpoint of a small installation area and easy layout (see FIG. 4). As long as the said container can accommodate a gel-like thing, the structure, a magnitude | size, a shape, a material, etc. will not ask | require especially. This container can have a heat insulation structure, for example. As this heat insulation structure, for example, (1) a form in which an inner wall for forming a heat insulation space is provided in the container (see FIGS. 5 and 6), (2) a form in which a heat insulating material is attached to the container, etc. One type or a combination of two or more types can be mentioned. Among these, from the viewpoint that it can be configured more simply and inexpensively, the above (1) form is preferable.

The “control device” is configured to start the discharge of the gel-like material generated earlier from the plurality of gel-like materials generated by the mixing device to one molding portion of the plurality of molding portions. The time interval (T1) until the completion of charging and the time interval (T2) from the start of discharge of the gel-like material to be generated later to the completion of charging into the other one of the plurality of molded portions As long as the transport apparatus is controlled so that the ratio (T1 / T2) to 1) exceeds 1, the structure, control mode, timing, etc. are not particularly limited. From the viewpoint of more reliably suppressing the supercooling of the gel-like material previously charged into the molded part, the time interval ratio (T1 / T2) is 1.3 or more, particularly 1.5 or more, and 1. It is preferable that it is 7 or more.
The control device can constitute, for example, a control unit of the mixing device.
In addition, as the above-mentioned “gel product generated first” and “gel product generated later”, for example, the gel product generated first time and the gel product generated second time It may be a gel that is continuously generated, or a gel that is generated discontinuously, such as a gel that is generated the first time and a gel that is generated the third time. it can. This point is described in the second embodiment described later. This method is also applied to the manufacturing method of synthetic resin products.

  The “welding device” is not particularly limited in terms of its structure, welding form, timing, etc., as long as the respective surfaces of a pair of press-molded products molded by the press device are welded in an overlapping manner. Absent. This welding apparatus has a pressing member capable of pressing the overlapping outer peripheral surfaces of a pair of press-formed products (see FIGS. 11 and 12).

2. Method for producing synthetic resin product Embodiment 2 The method for producing a synthetic resin product according to the present invention includes a mixing process, a transporting process, and a pressing process described below. This method for producing a synthetic resin product can further include, for example, a welding step described later.
In addition, the manufacturing method of the said synthetic resin product is the above-mentioned Embodiment 1. The manufacturing method using the manufacturing apparatus of the synthetic resin product.

  As long as the above-mentioned “mixing step” is a step in which synthetic resin waste material is put into a chamber of a mixing apparatus and the synthetic resin waste material is stirred and melted by a blade member rotated in the chamber to generate a gel-like material, The mixing form, timing, etc. are not particularly limited. As this mixing apparatus, for example, the above-described first embodiment. The thing of applying the structure of the mixing apparatus demonstrated in (1) can be mentioned.

  In the mixing step, for example, the synthetic resin waste material can be divided into a plurality of times in the chamber (see FIG. 16). In this case, for example, the number of rotations (N1) of the blade member when stirring the synthetic resin waste material that is divided and fed first among a plurality of divided resin materials, and the synthetic resin waste material that is divided and fed later The ratio (N1 / N2) with respect to the rotational speed (N2) of the blade member at the time of stirring can exceed 1. As this rotation speed ratio (N1 / N2), for example, the above-described first embodiment. And the configuration of the rotation speed ratio (N1 / N2) described in the above.

As long as the “conveying and feeding process” is a process in which the gel-like material generated in the mixing process and discharged from the chamber is transported to the pressing device and fed into each of a plurality of molding parts of the pressing device, the feeding and feeding is performed. The form, timing, etc. are not particularly limited. As this press apparatus, for example, the above-described first embodiment. And the configuration of the press apparatus described in the above.
In addition, the said conveyance injection | throwing-in process is the above-mentioned Embodiment 1. It can be performed using the transport input device described in the above.

  In the transporting and feeding step, for example, one of the plurality of molding units is molded from the start of discharge of the gel-like material generated earlier from the chamber among the plurality of gel-like materials generated by the mixing device. The time interval (T1) until completion of charging into the part, and from the start of discharge of the gel-like material to be generated later from the inside of the chamber to the completion of charging into the other one of the plurality of molded parts The ratio (T1 / T2) to the time interval (T2) can exceed 1. As this time interval ratio (T1 / T2), for example, the above-described first embodiment. And the configuration of the time interval ratio (T1 / T2) described in the above. In addition, this transfer charging step is performed, for example, in the first embodiment described above. This can be performed using the control device described in the above.

In the above-described transfer feeding process, for example, a lower opening part is formed so that the container provided at the tip of the robot arm constituting the robot closes the lower opening part of the discharge chute connected to the material discharge port of the chamber by driving the robot. Can be located directly below. This container preferably has a heat insulating structure.
For example, in the above-described first and second embodiments, the transporting step is described in the first embodiment. It can be performed using the transport input device described in the above.

  As long as the “pressing process” is a process of simultaneously pressing the gel-like material charged into each of the plurality of molded parts in the transporting and feeding process to form a plurality of press-formed products, the press form, timing, etc. It doesn't matter.

As long as the “welding step” is a step in which the respective surfaces of a pair of press-formed products formed by the pressing step are overlapped and welded, the welding mode, timing, etc. are particularly It doesn't matter. In this welding step, welding is performed in a state where the overlapping outer peripheral surfaces of the pair of press-formed products are pressed.
The welding step is, for example, the above-described embodiment 1. It can be performed using the welding apparatus described in the above.

Hereinafter, the present invention will be specifically described with reference to the drawings.
In this embodiment, a pallet is illustrated as the “synthetic resin product” according to the present invention, and a pallet manufacturing apparatus is illustrated as the “synthetic resin product manufacturing apparatus” according to the present invention.

(1) Configuration of Pallet Manufacturing Device As shown in FIG. 1, the pallet manufacturing device 1 according to the present embodiment includes a mixing device 3, a press device 4, a transport feeding device 5, a product take-out device 6, and a control device 7 (FIG. 7). See). The pallet manufacturing apparatus 1 further includes a welding apparatus described later.

  2 and 3, the mixing device 3 includes a base 11, a motor 12 is provided on one end side of the base 11, and a chamber 13 and a material are provided on the other end side of the base 11. A supply chamber 14 is provided adjacently. A rotating shaft 16 extending through the chamber 13 and the material supply chamber 14 is connected to the drive shaft 12 a of the motor 12 through a coupling 15. The rotating shaft 16 is rotatably supported at both ends via bearings 17. The chamber 13 and the material supply chamber 14 are communicated with each other through a communication port 18. The rotary shaft 16 is provided with a screw 19 for supplying a material into the chamber 13 at a portion corresponding to the material supply chamber 14. The rotating shaft 16 is provided with a plurality of blade members 20 at portions corresponding to the chamber 13 so as to extend in the centrifugal direction. Further, the rotary shaft 16 is formed in a hollow shape, and cold water for preventing overheating is circulated through the cold water circulation pipe 21 inside the rotary shaft 16.

  In the upper part of the material supply chamber 14, there is provided a hopper 23 to which a material obtained by fragmenting synthetic resin waste materials (for example, PP waste materials, PE waste materials, etc.) is supplied from a material metering and mixing supply device (not shown). The hopper 23 includes an upper storage portion 23a for storing material, a lower passage portion 23b continuous below the upper storage portion 23a, and a material charging port 23c that connects the upper storage portion 23a and the lower passage portion 23b. Is formed. The hopper 23 is slidably provided with an open / close lid 24 that opens and closes the material input port 23c. One end of the open / close lid 24 is in communication with the tip of the piston rod 25a of an air cylinder 25 (exemplified as an “open / close drive source” according to the present invention) that is driven and controlled by the control device 7.

As shown in FIGS. 2 and 3, a discharge port 27 is formed at the lower portion of the chamber 13 for discharging the synthetic resin waste material (that is, the gel-like material) that has been melted by stirring and melting in the chamber 13. Has been. An open / close lid 28 that opens and closes the discharge port 27 is swingably supported in the chamber 13. One end side of the opening / closing lid 28 is in communication with the tip end side of the piston rod 30a of the air cylinder 30 that is driven and controlled by the control device 7 via the link mechanism 29 (see FIG. 3). The discharge port 27 is connected to a discharge chute 31 that extends downward. Furthermore, a temperature detector 32 such as an infrared temperature sensor for detecting the internal temperature in a non-contact manner is provided at the upper portion of the chamber 13 (see FIG. 2). The temperature detector 32 is electrically connected to the control device 7, and the discharge port 27 is opened by the opening / closing lid 28 when the temperature detector 32 detects a predetermined temperature (for example, about 200 ° C.). It is like that.
In this embodiment, a water passage is formed in the outer peripheral wall 13a and the side end wall 13b (also referred to as “side plate”) constituting the chamber 13, and the inside of this water passage is for preventing overheating. Cold water is circulated.

  As shown in FIG. 1, the pressing device 4 includes upper and lower mold parts 37 and 38 in which first and second molding parts 35 and 36 are provided in the plane direction. These upper and lower mold parts 37 and 38 are brought close to and away from each other by a hydraulic pump 39 driven and controlled by the control device 7 (see FIG. 7). Further, the press device 4 simultaneously heats and compresses the gel-like materials charged in the first and second molding portions 35 and 36 to form a pair of press-molded products 40 and 40 (see FIG. 13). It is supposed to be.

  As shown in FIG. 1, the transport input device 5 is disposed between the mixing device 3 and the press device 4. As shown in FIG. 4, the transport input device 5 includes a vertical articulated robot 41 and a container 42 connected to the tip of a robot arm 41 a that constitutes the robot 41. As shown in FIGS. 5 and 6, the container 42 includes a stainless outer box 43 that opens upward and a stainless inner box that opens upward and is welded to the inside of the outer box 43. 44. A heat insulating space 45 is formed between the outer box 43 and the inner box 44. The opening amount of the upper open portion of the outer box 43 is set to be approximately the same as the opening amount of the lower open portion 31 a of the discharge chute 31. Further, the robot 41 is driven and controlled by the control device 7, and as shown in FIG. 1, the container 42 is moved to a receiving position 46 (see FIGS. 3 and 5) immediately below the lower opening 31 a of the discharge chute 31. It is made to transfer between the discharge position 47 immediately above the 1st or 2nd forming parts 35 and 36 of press machine 4.

  As shown in FIG. 1, the product take-out device 6 is disposed between the press device 4 and the stock unit 53. The product take-out device 6 is a pair of a vertical articulated robot 49 having the same configuration as the robot 41 of the transfer and feeding device 5 and a pair of robot arms 49 a that constitute the robot 49 and are formed by the press device 4. And a fork-shaped receiving tool 50 for taking out the press-formed products 40, 40 at once. The robot 49 is driven and controlled by the control device 7, and the receiving tool 50 is received at a receiving position 51 corresponding to the first and second forming portions 35 and 36 of the press device 4 and a discharging position 52 corresponding to the stock portion 53. It is supposed to be transported between. In the stock portion 53, a plurality of press-formed products 40 are stacked in the vertical direction.

  As shown in FIG. 7, the control device 7 includes a CPU 54a, a ROM 54b, and a RAM 54c. The CPU 54a executes various processing operations according to a control program stored in the ROM 54b, and the RAM 54c is used for temporarily storing data. . Then, the control device 7 controls the air cylinder 25 of the mixing device 3 to open the material inlet 23c of the hopper 23 by the opening / closing lid 24, and a predetermined amount of material stored in the hopper 23 is charged into the chamber 13. (See FIG. 3). Further, the control device 7 drives and controls the motor 12 of the mixing device 3 to rotate the blade member together with the rotating shaft 16 at a high speed (for example, the blade tip speed is about 30 m / second), and a predetermined amount put into the chamber. These materials are stirred and melted to produce a predetermined amount of gel-like material (see FIG. 2).

  Further, when the air cylinder 30 of the mixing device 3 is driven and controlled by the control device 7 based on the temperature detected by the temperature detector 32 and the discharge port 27 of the chamber 13 is opened by the open / close lid 28, A predetermined amount of the generated gel-like material is discharged from the chamber 13 (see FIG. 3). Further, when the hydraulic pump 39 of the press device 4 is driven and controlled by the control device 7 and the upper and lower mold portions 37 and 38 are brought close to each other, the first and second molding portions 35 and 36 make a pair of press-formed products. 40 and 40 are simultaneously formed (see FIG. 1). Further, the control device 7 controls the driving of the robot 41 of the transporting device 5 so that the container 42 is transferred between the receiving position 46 and the discharging position 47 (see FIG. 1). Further, the robot 49 of the product take-out device 6 is driven and controlled by the control device 7, and the receiving tool 50 is transferred between the receiving position 51 and the discharging position 52 (see FIG. 1).

  Here, from the start of the discharge of the first gel-like material generated by the mixing device 3 from the inside of the chamber 13 to the completion of the charging to the first molding unit 35 by the control of the transporting device 5 by the control device 7. The time interval T1 (see FIG. 15) is set to about 50 seconds. On the other hand, the time interval T2 (see FIG. 15) from the start of discharge of the second gel-like material generated by the mixing apparatus 3 from the chamber 13 to the completion of the insertion into the second molding section 36 is set to about 25 seconds. Has been. Therefore, the time interval ratio (T1 / T2) is about 2.

  As shown in FIGS. 8 and 9, the welding apparatus 8 includes a pair of stock portions 56a and 56b, a reversing portion 57 disposed between the stock portions 56a and 56b, and a welding portion connected to the reversing portion 57. 58 and a product take-out part 59 that is connected to the welding part 58 and is arranged on the opposite side of the reversing part 57. A plurality of press-formed products 40 are stacked in the same direction in the vertical direction on each of the pair of stock portions 56a and 56b. The reversing unit 57 reverses one press-formed product 40 of the pair of press-formed products 40 supplied from the pair of stock units 56 a and 56 b to the reversing unit 57, so that the pair of press-formed products 40 and 40. Are aligned so that the convex portions 40a face each other (see FIG. 13). Further, the reversing unit 57 can convey the pair of press-formed products 40, 40 in an opposed state to the welding unit 58.

  The welded portion 58 has a transfer mechanism (not shown) that brings the pair of press-formed products 40, 40 facing each other closer to and away from each other. Further, as shown in FIGS. 8 and 10, the welded portion 58 has a flat heating plate 60 capable of heating the tip surfaces of the convex portions 40 a of the pair of press-formed products 40, 40 in the opposed state. ing. The heating plate 60 has a heating position 61 (shown by a solid line in FIG. 8) capable of heating the convex portions 40a of the pair of press-formed products 40, 40 supplied to the welded portion 58, and a pair of press-formed products. 40 is moved between a retracted position 62 (shown in phantom lines in FIG. 8).

  Further, as shown in FIGS. 11 and 12, the welding portion 58 includes a plurality of pressing members 64a capable of pressing the overlapping outer surface 40b of the convex portions 40a of the pair of press-formed products 40, 40 that are overlapped with each other. , 64b. The pressing member 64 a is formed in a substantially plane L shape so as to press the corner convex portion 40 a of the press-formed product 40. In addition, the pressing member 64b is formed in a substantially bar shape so as to press the convex portions 40a between the convex portions 40a at the opposite corners of the press-formed product 40. These pressing members 64 a and 64 b are connected to the piston rod 65 a of the air cylinder 65. Then, a pressing position 66 (shown by a solid line in FIG. 12) where the pressing members 64a and 64b press the outer surface of the convex portion 40a by driving control of the air cylinder 65, and a retreat away from the outer surface of the convex portion 40a. It is moved between a position 67 (indicated by a virtual line in FIG. 12). Further, a pallet 70 (see FIG. 14) obtained by welding the pair of press-formed products 40, 40 at the welding portion 58 is taken out from the product take-out portion 6.

(2) Operation of Pallet Manufacturing Device Next, the operation of the pallet manufacturing device 1 will be described.
First, the manufacturing process of the pair of press-formed products 40, 40 will be described. As shown in FIG. 15, in the mixing apparatus 3, a predetermined amount (for example, about 10 kgf) of synthetic resin waste material is placed in the upper storage portion 23 a of the hopper 23 with the material input port 23 c of the hopper 23 closed by the opening / closing lid 24. A material obtained by fragmenting (for example, PP waste material, PE waste material, etc.) is supplied. Immediately after the supply of the material is completed, the open / close lid 24 is slid to open the material inlet 23c of the hopper 23 (S1), and the rotating shaft 16 is rotated at a high speed (for example, about 1700 rpm) (S2). Then, the material supplied into the hopper 23 is supplied into the chamber 13 through the material supply chamber 14 by the action of the screw 19. The material supplied into the chamber 13 is stirred and melted by the action of the blade member 20 to be gelled, and a predetermined amount (for example, about 10 kgf) of a gel-like material is generated.

  When a gel-like material is generated by the mixing device 3, the container 42 at the tip of the robot arm 41a is held at the receiving position 46 (see FIG. 3) (S3). From this state, when the opening / closing lid 28 is swung to open the discharge port 27 of the chamber 13 (S4), the gel-like material discharged from the chamber 13 through the discharge port 27 passes through the discharge chute 31. It is put into the container 42. Then, the container 42 at the tip of the robot arm 41a is held at the receiving position 46 for a predetermined waiting time t1 (for example, about 40 seconds) in a state where the gel-like material is received (S5). After the waiting time t1, the container 41 is moved from the receiving position 46 to the discharge position 47 by the robot 41 (S6), and the vertical direction of the container 42 is reversed at the discharge position 47 so that the gel in the container 42 The shaped product is charged (discharged) into the first molding part 35 of the pressing device 4 (S7).

  Next, in substantially the same manner as described above, in the mixing device 3, a predetermined amount (for example, about 10 kgf) of material is supplied into the upper storage portion 23a of the hopper 23, and immediately after the material supply is completed, the hopper 23 The material inlet 23c is opened (S11), the rotating shaft 16 is rotated at a high speed (S12), and a predetermined amount (for example, about 10 kgf) of a gel-like material is generated in the chamber 13. At this time, the container 42 is held at the receiving position 46 (see FIG. 3) (S13). When the discharge port 27 of the chamber 13 is opened from this state (S14), the gel discharged from the chamber 13 is discharged. The product is put into the container 42. The container 42 is held at the receiving position 46 with a predetermined waiting time t2 (for example, about 10 seconds) in a state where the gel-like material is received (S15), and then moved from the receiving position 46 to the discharge position 47. (S16) At the discharge position 47, the gel-like material in the container 42 is charged (discharged) into the second molding part 36 of the press device 4 (S17).

Next, in the press device 4, the upper mold part 37 is lowered and the gel-like material charged into the first and second molding parts 35, 36 is simultaneously heated and compressed to form a pair of press-molded products 40, 40. (S21). Thereafter, the pair of press-formed products 40, 40 are knocked out (S22). At this time, the receiving tool 50 at the tip of the robot arm 49a is moved to the receiving position 51 to receive the pair of press-formed products 40, 40 (S23), and then moved from the receiving position 51 to the discharge position 52 to be the stock section 53. The press-formed product 40 is stocked (S24).
Thereafter, the above-described operation is repeatedly performed, so that the pair of press-formed products 40 and 40 are sequentially formed and stocked in the stock portion 53.

Next, the manufacturing process of the pallet 70 will be described.
As shown in FIGS. 8 and 9, a plurality of press-formed products 40 are stacked on the pair of stock portions 56 a and 56 b of the welding device 8. A pair of press molded products 40 is supplied from the pair of stock portions 56a and 56b to the reversing unit 57, and the vertical direction of one press molded product 40 is reversed, so that the pair of press molded products 40 and 40 are Positioning is performed so that the convex portions 40a face each other (see FIG. 13). Next, the pair of press-formed products 40, 40 is conveyed to the welded portion 58 in the facing state, and the heating plate 60 is inserted between the facing surfaces. And each convex part 40a is heated with the heating plate 60 by making a pair of press molded products 40 and 40 adjoin. Next, the heating plate 60 is made to escape from between the pair of press-formed products 40, 40, the convex portions 40a of the pair of press-formed products 40, 40 are brought into contact with each other, and the convex portions 40a are overlapped by the pressing members 64a, 64b. The mating outer surface 40b is pressed (see FIGS. 11 and 12). Thereby, a pair of press molded products 40 and 40 are welded, and the pallet 70 (refer FIG. 14) will be obtained.

(3) Effects of the Embodiment As described above, according to the pallet manufacturing apparatus 1 of the present embodiment, the mixing apparatus 3, the transport input apparatus 5, and the press apparatus 4 are provided, so that they are input into the chamber 13 of the mixing apparatus 3. The synthetic resin waste material is stirred and melted by the blade member 20 to generate a gel-like material, and the gel-like material generated by the mixing device 3 and discharged from the chamber 13 is transported to the press device 4 by the transport input device 5. A pair of presses are made by simultaneously pressing the gel-like material charged in each of the first and second molding parts 35 and 36 of the press device 4 and charged in each of the first and second molding parts 35 and 36. Molded articles 40 and 40 are molded. Thus, since a pair of press-molded articles 40 and 40 can be obtained simultaneously with one press device 4, a synthetic resin product made of synthetic resin waste can be efficiently manufactured.

  In the present embodiment, the ratio (T1 / T2) between the time interval T1 of the gel-like material generated first by the mixing apparatus 3 and the time interval T2 of the gel-like material generated later is set to about 2. Therefore, it is possible to bring the time for charging the gel-like material generated first into the first molding part 35 closer to the time for charging the gel-like material generated later into the second molding part 36. As a result, it is possible to obtain a pair of press-molded products 40, 40 with less variation in quality by suppressing the supercooling of the gel-like material previously charged into the first molding part 35.

  In the present embodiment, the transfer and feeding device 5 includes a robot 41 and a container 42 provided at the tip of a robot arm 41 a constituting the robot 41, and the container 42 is disposed on the discharge chute 31. Since the lower opening 31a is positioned so as to close the lower opening 31a, the gel-like material previously generated by the mixing device 3 and discharged from the chamber 13 is discharged into the container 42 via the discharge chute 31. If the container 42 is held in position for a predetermined waiting time t1 (see FIG. 15) in this state, the supercooling of the gel-like material in the container 42 can be more reliably suppressed.

  Further, in the present embodiment, the container 42 is configured to include the outer box 43 and the inner box 44 that form the heat insulation space. Therefore, the container 42 can be provided with a heat insulating function with a relatively simple configuration. The overcooling of the gel-like material in 42 can be further reliably suppressed.

  Furthermore, in the present embodiment, the welding apparatus 8 is configured to include the pressing members 64a and 64b that press the overlapping outer peripheral surfaces 40b of the convex portions 40a of the pair of press-formed products 40 and 40, and thus the pallet 70 obtained. Generation | occurrence | production of the burr | flash on the outer peripheral surface of can be suppressed. Moreover, since the surface area of the welding part in an outer peripheral surface spreads by the press of the press members 64a and 64b, the welding intensity | strength of a pair of press molded products 40 and 40 can be raised.

  In the present invention, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the above-described embodiment, in the mixing apparatus 3, a predetermined amount (for example, about 10 kgf) of synthetic resin waste material is put into the chamber 13 at a time when the blade member 20 starts high-speed rotation. For example, as shown in FIG. 16, first, a predetermined amount (for example, about 8 kgf) of synthetic resin waste material is charged 72 at the start of high-speed rotation of the blade member 20, and then a predetermined amount (for example, about 4 kgf). The synthetic resin waste material may be additionally input 73. Accordingly, the synthetic resin waste material can be additionally charged after the synthetic resin waste material already charged in the chamber 13 starts to melt, the rotational resistance of the blade member 20 in the chamber 13 is reduced, and the synthetic resin waste material to be additionally charged later. Is promoted, and the ability to generate a gel-like material in the mixing apparatus 3 can be enhanced.

  In the case of the above-mentioned form, the rotational speed N1 (for example, about 1700 rpm) of the blade member 20 at the time of stirring the synthetic resin waste material that is dividedly charged first by the control device 7 among the multiple divided inputs of the synthetic resin waste material. And the motor 12 is controlled such that the ratio (N1 / N2) of the rotation speed N2 (for example, about 1200 rpm) of the blade member 20 when stirring the synthetic resin waste material that is dividedly charged later exceeds 1. preferable. This is because the load applied to the mixing device 3 when the synthetic resin waste material is additionally charged can be suppressed while suppressing a decrease in the ability to generate the gel-like material in the mixing device 3.

Moreover, in the said Example, although the press apparatus 4 which has the two shaping | molding parts 35 and 36 was illustrated, it is not limited to this, For example, it is good also as a press apparatus which has three or more shaping | molding parts. In this case, for example, as shown in FIG. 17, the ratio (T1 / T2) between the time interval T1 of the gel-like material generated first time and the time interval T2 of the gel-like material generated second time in the mixing device 3 ) Is set to exceed 1, and the ratio (T2 / T3) of the time interval T2 of the gel-like material generated at the second time to the time interval T3 of the gel-like material generated at the third time exceeds 1 It is preferable to set so. This is because a plurality of press-formed products with less quality variation can be obtained.
In the case of the above-described embodiment, the time interval T1 of the gel-like material generated first time by the mixing device 3 and the time interval T2 of the gel-like material generated second time are set to substantially the same value. The ratio (T2 / T3) between the time interval T1 of the gel-like material generated at the second time and the time interval T3 of the gel-like material generated at the third time may be set to exceed 1.

  Moreover, in the said Example, although the temperature detector 32 was provided in the outer peripheral wall 13a which comprises the chamber 13, it is not limited to this, For example, the temperature detector 32 is provided in the side end wall 13b which comprises the chamber 13. You may make it provide. Thereby, durability of the temperature detector 32 can be improved more.

  Further, in the above embodiment, cooling water or cooling air is supplied into the heat insulating space 45 of the container 42 at a predetermined timing (for example, when a gel-like material discharged from the chamber 13 is received in the container 42). You may do it. Thereby, adhesion of the gel-like substance in the container 42 can be suppressed.

  Widely used as a technology for producing synthetic resin products made of synthetic resin waste. In particular, it is suitably used as a technique for producing a pallet formed by welding a pair of press-formed products.

It is a whole top view of the pallet manufacturing apparatus concerning a present Example. It is a side view of the mixing apparatus which concerns on a present Example. FIG. 3 is a view taken in the direction of arrow III in FIG. 2. It is a side view of the conveyance input apparatus which concerns on a present Example. It is a longitudinal cross-sectional view of the container which concerns on a present Example. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a block diagram for demonstrating the control form of the control apparatus which concerns on a present Example. It is a top view of the welding apparatus which concerns on a present Example. It is the IX-IX sectional view taken on the line of FIG. It is explanatory drawing for demonstrating the mounting process in a welding apparatus. It is explanatory drawing for demonstrating the mounting process in a welding apparatus. It is a XII arrow line view of FIG. It is explanatory drawing for demonstrating the welding process in a welding apparatus. It is a perspective view of the pallet which concerns on a present Example. It is a time chart which shows the manufacturing process of the press-formed product which concerns on a present Example. It is a time chart figure which shows another mixing process. It is a time chart figure which shows the manufacturing process of another press molded product.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1; Pallet manufacturing apparatus, 3; Mixing apparatus, 4; Press apparatus, 5; Conveying and feeding apparatus, 7; Control apparatus, 8; Welding apparatus, 12; Motor, 13: Chamber, 20: Blade member, 23: Hopper, 23a ; Material input port, 24; Open / close lid, 25; Air cylinder, 27; Discharge port, 28; Open / close lid, 30; Air cylinder, 31; Discharge chute, 31a; Lower open portion, 35; 2nd shaping | molding part, 40; Press-molded article, 40a; Convex part, 41; Robot, 41a; Robot arm, 42; Container, 45; Thermal insulation space, 64a, 64b;

Claims (14)

A mixing device that has a blade member rotatably provided in the chamber and generates a gel-like material by stirring and melting the synthetic resin waste material charged into the chamber;
A press device that has a plurality of molding parts and simultaneously presses the gel-like material charged into each of the plurality of molding parts to mold a plurality of press-molded products;
A synthetic resin product comprising: a feeding device that transports the gel-like material generated by the mixing device and discharged from the chamber to the press device and feeds the gel-like material into each of the plurality of molding units. Manufacturing equipment.   From the start of discharging the gel-like material generated first among the plurality of gel-like materials generated by the mixing device to the completion of charging into one molding portion of the plurality of molding portions. A time interval (T1) and a time interval (T2) from the start of discharging the gel-like material to be generated later from the inside of the chamber to the completion of charging into the other one of the plurality of molding parts The synthetic resin product manufacturing apparatus according to claim 1, further comprising a control device configured to control the transport input device so that a ratio (T1 / T2) exceeds 1.   The mixing device includes a hopper that is connected to the chamber and stores synthetic resin waste, an open / close lid that opens and closes a material input port formed in the hopper, and an open / close drive source that drives the open / close lid to open and close 3. A synthetic resin product manufacturing apparatus according to claim 1, further comprising a control unit that controls the open / close drive source so that the synthetic resin waste material is divided into a plurality of times and the synthetic resin waste material is introduced into the chamber. . The blade member is rotatable by a motor,
The control unit includes the number of rotations (N1) of the blade member when the synthetic resin waste material that is divided and fed first is divided among the plurality of divided inputs of the synthetic resin waste material, and the synthetic resin waste material that is divided and fed later. The apparatus for producing a synthetic resin product according to claim 3, wherein the motor is controllable so that a ratio (N1 / N2) to a rotation speed (N2) of the blade member when agitating is exceeded 1.   The transport input device has a robot and a container provided at the tip of a robot arm constituting the robot, and the container is driven by the discharge chute connected to the material discharge port of the chamber. The synthetic resin product manufacturing apparatus according to any one of claims 1 to 4, wherein the apparatus is located immediately below the lower open portion so as to block the lower open portion.   The synthetic resin product manufacturing apparatus according to claim 5, wherein the container has a heat insulating structure.   The welding apparatus further includes a welding device that superimposes and welds the surfaces of the pair of press-molded products of the plurality of press-molded products molded by the press device, and the welding device includes a stack of the pair of press-molded products. The apparatus for producing a synthetic resin product according to any one of claims 1 to 6, further comprising a pressing member capable of pressing the combined outer peripheral surface. A mixing step of introducing a synthetic resin waste material into a chamber of a mixing apparatus and stirring and melting the synthetic resin waste material with a blade member rotated in the chamber to generate a gel-like material;
A transporting and feeding step of transporting the gel-like material generated in the mixing step and discharged from the chamber to a press device and feeding it to each of a plurality of molding parts of the press device;
A method of manufacturing a synthetic resin product, comprising: a pressing step of simultaneously pressing the gel-like material charged into each of the plurality of molding parts in the transporting and feeding step to mold a plurality of press-molded products.   In the carrying-in process, one of the plurality of molding units from the start of discharge of the gel-like material generated first among the plurality of gel-like materials generated by the mixing device from the chamber. The time interval (T1) until the charging is completed and the time from the start of discharge of the gel-like material to be generated later to the completion of the charging to the other one of the plurality of molded parts The method for producing a synthetic resin product according to claim 8, wherein a ratio (T1 / T2) to the interval (T2) exceeds 1.   The method for producing a synthetic resin product according to claim 8 or 9, wherein in the mixing step, the synthetic resin waste is divided into a plurality of times in the chamber.   In the mixing step, the number of rotations (N1) of the blade member when stirring the synthetic resin waste material that is divided and fed first among a plurality of divided charges of the synthetic resin waste material, and the synthetic resin waste material that is divided and fed later The method for producing a synthetic resin product according to claim 10, wherein a ratio (N1 / N2) to the number of rotations (N2) of the blade member at the time of stirring is over 1.   In the carrying-in process, the lower opening portion is configured such that a container provided at the tip of the robot arm constituting the robot closes the lower opening portion of the discharge chute connected to the material discharge port of the chamber by driving the robot. The manufacturing method of the synthetic resin product as described in any one of Claims 8 thru | or 11 located immediately below.   The method for producing a synthetic resin product according to claim 12, wherein the container has a heat insulating structure.   The method further comprises a welding step of overlapping and welding the surfaces of the pair of press-formed products among the plurality of press-formed products formed by the pressing step, and the welding step includes stacking the pair of press-formed products. The method for producing a synthetic resin product according to any one of claims 8 to 13, wherein the bonded outer peripheral surfaces are welded in a pressed state.

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