JP2002225123A - Resin sheet molding line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the manual handling of a resin sheet while being conveyed, to reduce operation costs, to control the installation area of an apparatus, to make positioning during trimming correct, and to prevent the lowering of throughput. SOLUTION: A trimming device 31 which is arranged movably in the conveyance direction of a resin sheet 23 downstream from a molding apparatus and trims a molding 20, and a conveyer for conveying the trimmed molding, are provided. The trimming device 31 is slid along a guide member 35 extended to a position above the conveyer and has a molding holding apparatus 2 which holds the trimmed molding 20 to transfer it onto the conveyer, and the distance between the molding apparatus and the trimming device 31 can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a resin sheet molding line.

[0002]

2. Description of the Related Art Conventionally, a resin sheet is formed into a resin for forming a resin molded article such as a container for storing foods, beverages, electric parts, daily necessities, pharmaceuticals, etc., and a lid (lid) of the container. In a sheet molding line, a molded product is carried out from a trimming device that cuts and separates a resin product molded by a molding device from a resin sheet.

FIG. 2 is a conceptual side view of a conventional resin sheet molding line, and FIG. 3 is a plan view of FIG.

[0004] As shown in the figure, a resin sheet 113 fed from a material roll 112 is intermittently conveyed by rotating a conveying device 111 composed of a chain with claws or the like, and is sent to a heating unit 101. Here, the transport device 111 intermittently transports the resin sheet 113 at a predetermined pitch, for example, a pitch corresponding to a length in which one shot is formed in the forming unit 102 described later. In the heating unit 101, the resin sheet 113 receives radiant heat from an upper heater 115 and a lower heater 116 disposed above and below a resin sheet conveying path,
Heated to a temperature suitable for molding.

[0005] The heated resin sheet 113 is
The sheet is fed by the transfer device 111 to the forming unit 102 disposed downstream of the heating unit 101 in the transfer direction. The forming section 102 is, for example, a vacuum forming apparatus, and includes an upper die 117 having a plurality of concave portions moved up and down by a driving device (not shown), and a lower die 118 having a number of convex portions corresponding to the concave portions. Have. Here, the upper mold 117 and the lower mold 118 are moved, and the heated resin sheet 113 is sandwiched from above and below to close the mold.
Mold with shots. When the mold is closed, the resin sheet 113 is stopped.

[0006] Subsequently, the resin sheet 113 on which the molded article 110 has been formed is further fed into the sheet cut section 103 disposed downstream in the transport direction. In the sheet cutting section 103, the resin sheet 113 has a predetermined length, for example,
Is cut to a length in which one shot is formed, and becomes a cut sheet 113a. Then, the cut sheet 113a is transported downstream by the transport conveyor 122, and is carried into the case 123 of the product receiver 104 on the downstream side of the transport conveyor 122. Here, the case 123
The cut sheets 113a are piled up and stacked.

Next, a case 123 in which a predetermined number of cut sheets 113a are stacked is different from a line in which the raw roll 112, the heating unit 101, the forming unit 102, and the sheet cutting unit 103 are sequentially arranged. At the beginning of the line, it is transported by the hands of workers. And cut sheet 113
a is taken out of the case 123 one by one by a worker's hand and placed on the moving table 125 in the mold moving space 106. Subsequently, the moving table 125 is moved rightward in the figure and stopped by the trimming unit 107. Then, the push-off table 126 is moved downward from above the moving table 125 by a drive device (not shown), and the molded product 110 is cut by the push-off blade (not shown) attached to the lower surface of the push-off table 126 in the drawing.
And is separated, ie, trimmed. Here, the position of each press cutting blade corresponds to the position of each molded product 110. Further, the shape of the pressing blade is the same as that of the molded product 1.
10 corresponds to the shape around the molded product 11, for example.
If 0 is a circular bowl, the pressing blade has an annular shape so as to cut the edge of the bowl as the molded product 110 into an annular shape.

When the molded product 110 is trimmed and the push-off table 126 is moved upward, the holding member 127 having the holding means is moved to the left along the guide member 128 in the figure, and the moving table 12 is moved.
Stopped just above 5. Subsequently, the holding member 12
7 is moved downward, and the molded product 110 on the moving table 125 is held from above by the holding means. Here, the holding means is, for example, a vacuum suction means,
It is arranged at a position corresponding to all the molded products 110 on the moving table 125, and holds these molded products 110 at the same time. Subsequently, after the holding member 127 is moved upward, the first member is moved rightward in the drawing along the guide member 128 in the first direction.
It is moved to the transport unit 108.

As a result, all the molded products 110 trimmed from the cut sheet 113a are carried out from the moving table 125. And the moving table 1
The cut sheet 113a remaining on the surface 25 is removed by a worker's hand as scrap and discarded. Further, the moving table 125 is moved to the left in the figure, and returns to the mold moving space 106.

On the other hand, the holding member 127 is
8, stopped above the first conveyor 129,
Subsequently, it is moved downward. Subsequently, the holding member 127
When the holding means releases the holding of the molded article 110, the molded article 110 is placed on the first conveyor 129.

Thereafter, by repeating the above operation,
The molded products 110 are accumulated on the first conveyor 129. In addition, the first conveyor 129 is gradually lowered as the molded products 110 accumulate. Then, when a predetermined number of molded products 110 are accumulated, the first conveyor 129 is operated, and the accumulated molded products 110 are sent out onto the second conveyor 131 in the second transport unit 109 disposed on the right side in the drawing.

Then, the integrated molded product 110 is
By the conveyor 131, it is sent to a post process such as packaging and boxing.

[0013]

However, in the conventional resin sheet molding line, as described above, a case 1 in which a predetermined number of cut sheets 113a are integrated is used.
23 is a raw material roll 112, a heating unit 101, a forming unit 10
2 and the sheet cut unit 103 are conveyed by a worker's hand to the beginning of a line different from the line on which they are sequentially arranged. Then, the cut sheets 113a are taken out one by one from the case 123 by a worker's hand, and the cut table 113a in the mold moving space 106 is moved.
Placed on top.

Therefore, the operation of the resin sheet forming line requires manpower, the working efficiency is deteriorated, and the operating cost is increased. In addition, the arrangement area of the entire device is increased,
Low space efficiency.

Further, since the cut sheet 113a is placed on the moving table 125 by the operator's hand,
The positioning of the cut sheet 113a on the moving table 125 tends to be incorrect. If the positioning of the cut sheet 113a is incorrect, the push-off table 12
6 becomes inaccurate, and the molded product 110 is not trimmed accurately, resulting in a defective product.

Further, since the moving distance of the holding member 127 is constant, for example, the length of the cut sheet 113a is reduced in accordance with the replacement of the upper die 117 and the lower die 118 of the molding part 102 with small ones. If it is shortened, the moving distance becomes unnecessarily long. If the moving distance is unnecessarily long, the loss time increases, and the throughput of the resin sheet molding line decreases.

The present invention solves the above-mentioned problems of the conventional resin sheet molding line, and eliminates the need to manually handle resin sheets and cut sheets during conveyance, thereby reducing operating costs and increasing the installation area of the apparatus. It is another object of the present invention to provide a resin sheet molding line in which positioning at the time of trimming is accurate and the throughput does not decrease.

[0018]

For this purpose, in a resin sheet molding line of the present invention, a conveying device for intermittently conveying a resin sheet, a molding device for molding a molded article on the resin sheet, and the molding device A trimming device that is disposed movably in the transport direction of the resin sheet downstream of the trimming device and that trims the molded product, and a transport conveyor that is disposed downstream of the trimming device and transports the trimmed molded product, A molding product holding device configured to hold the molded product trimmed by the trimming device and transfer the molded product onto the conveyor, and a gap between the molding device and the trimming device is formed by one shot of the molding device; It can be adjusted to be an integral multiple of the length of the resin sheet.

In another resin sheet molding line of the present invention, the resin sheet molding line is further provided downstream of the trimming device,
And a pulverizer for pulverizing the resin sheet after the molded article is trimmed.

In still another resin sheet molding line according to the present invention, the molded article holding device further includes a guide member extending from the trimming device to a position on the conveyor, and a slide member along the guide member for trimming. Holding means for holding the molded article and transferring the molded article onto the transport conveyor.

In still another resin sheet molding line of the present invention, the molded article holding device is further integrated with an upper mold table of the trimming apparatus having a pressing blade for trimming the molded article.

In still another resin sheet molding line of the present invention, the guide member is attached to the trimming device.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall view of a resin sheet forming line according to a first embodiment of the present invention, and FIG. 4 is an enlarged view of a punching blade in a trimming device.

In the figure, reference numeral 10 denotes a resin sheet molding line, in which a continuous resin sheet 23 is provided with foods such as cup noodles, sashimi and jelly, drinks such as fruit juice and carbonated water, and the like.
After molding a resin molded article 20 such as a container for accommodating electric parts, daily necessities, medicines, etc., and a lid of the container, the molded article 20
Is cut from the resin sheet 23, separated, accumulated,
Send out to the post-process such as packaging and boxing.

The molded article 20 in the present embodiment may have any shape, but can be fitted together and integrated in consideration of handling in transportation, storage and the like. Desirably, the shape is, for example, a dish, cup, or the like having a sloped side wall, a wide opening, and a narrow bottom.

The resin sheet 23 in the present embodiment
May be any, for example, PVC
(Polyvinyl chloride), PS (polystyrene), expanded polystyrene, PP (polypropylene), PET (polyethylene terephthalate), PC (polycarbonate), A
It is made of BS resin, methacrylic resin, biodegradable resin and the like.
Further, in consideration of water resistance, gas barrier properties and the like, a sheet in which a plurality of types of resins are laminated may be used.

FIG. 1A is a schematic plan view of a resin sheet molding line, and FIG. 1B is a side view thereof.

As shown in FIG. 1 (b), the resin sheet 23 fed from the material roll 22 is intermittently conveyed by rotating a conveying device 21 composed of a chain with claws or the like, and the heating unit 11 Sent to. Here, the conveying device 21 intermittently conveys the resin sheet 23 at a predetermined pitch, for example, a pitch corresponding to a length in which one shot is formed in the forming section 12 described later. In the heating section 11, the resin sheet 23
Are upper heaters 25 arranged above and below the resin sheet conveying path.
Then, it receives the radiant heat from the lower heater 26 and is heated to a temperature suitable for molding.

The molding temperature varies depending on the molding conditions, the type of the resin sheet 23, the thickness, and the like. However, in thermoforming, generally, when the resin sheet 23 is PVC, the temperature is one.
20-140 [° C], 110-150 for PS
[° C.], 170-220 [° C.] for PP, 140-190 [° C.] for PE, 130 for ABS resin
~ 150 [° C], 135-155 [° C] for PET
It is about.

Then, the heated resin sheet 23 is sent by the conveying device 21 to the forming section 12 provided on the downstream side of the heating section 11. Here, upstream or downstream means upstream or downstream in the transport direction of the resin sheet 23. The forming section 12 is formed, for example, by vacuum forming, pressure forming,
It comprises a thermoforming device for thermoforming the resin sheet 23 by a thermoforming method such as draw forming, press forming, and matched mold forming. The thermoforming device includes a plurality of recesses,
An upper mold 27 that is moved up and down by a driving device (not shown), and a lower mold 28 that has a number of protrusions corresponding to the number of concave portions and is moved up and down by a driving device (not shown).
Having.

Here, the thermoforming apparatus moves the upper mold 27 and the lower mold 28, sandwiches the heated resin sheet 23 from above and below, and closes the mold to form the resin sheet 2.
A plurality of molded articles 20 are molded on one shot. When the mold is closed, the resin sheet 23 is stopped. Since the concave and convex portions are provided in plural numbers in the width direction (the vertical direction in FIG. 1A) and the transport direction of the resin sheet 23, for example, five rows each having five rows, one shot is provided. Thus, for example, 5 (pieces) × 5 (rows) = 2
It is molded five by five.

Subsequently, the resin sheet 23 on which the molded article 20 has been formed is sent to the trimming section 14 provided further downstream. The trimming unit 14 includes the trimming device 3
The molded article 20 is cut from the resin sheet 23 by the upper mold table 34 and the lower mold table 33 of the trimming device 31 and separated, that is, trimmed.

The molding section 12 and the trimming section 14
Is a shot holding unit 13. The length of the shot holding unit 13 is determined by the upper mold 27 and the lower mold 28 of the thermoforming device.
Is the distance between the right end in the drawing and the left end in the drawing of the upper mold table 34 and the lower mold table 33 of the trimming device 31, and the distance between the resin sheet 23 formed by one shot of the thermoforming device. Equal to length. Note that the length of the shot holding portion 13 does not necessarily have to be equal to the length of the resin sheet 23 formed in one shot of the thermoforming device, and may be an integer multiple of the length.

Here, the trimming device 31 is mounted on the guide means 30 so as to be movable by a distance A in the conveying direction of the resin sheet 23. The guide means 30 is, for example, a rail, a guide rod, etc.
2 is mounted on the same base as the trimming device 3
1 can slide on the guide means 30 so as to be able to stop and move, and the position of the resin sheet 23 in the transport direction can be adjusted. For this reason, for example, in response to replacing the upper mold 27 and the lower mold 28 of the thermoforming device with small or large ones, the length of the resin sheet 23 molded by one shot of the thermoforming device is changed. In this case, by adjusting the position of the trimming device 31, the length of the shot holding unit 13 can be reduced by one in the thermoforming device.
The length can be an integral multiple of the length of the resin sheet 23 formed by the shot.

The length of the lower table 33 of the trimming device 31 is substantially equal to the length of the resin sheet 23 formed by one shot of the thermoforming device. Then, the resin sheet 23 sent out from the thermoforming device is stopped on the lower mold table 33. Further, the trimming device 31 has a moving table 32 which is vertically moved by a driving device (not shown). A guide member 35 such as a rail or guide rod extending downstream is attached to the moving table 32. Then, the upper table 34 is attached so as to be able to slide along the guide member 35. In addition,
The lower mold table 33 may be moved vertically by a driving device (not shown).

Here, FIG.
A plurality of pushing blades 45 as shown in (a) or (b)
Is attached. The number of the press cutting blades 45 depends on the number of molded products 2 formed on the resin sheet 23 by one shot of the thermoforming device.
The position of each push cutting blade 45 corresponds to the position of each molded product 20 corresponding to the number 0. For example, if the molded product 20 is 5 (pieces) ×
When 5 (row) = 25 pieces are formed, the pressing blade 45 is 5
(Pieces) × 5 (rows) = 25 pieces are attached. Further, the shape of the pressing blade 45 corresponds to the shape of the periphery of the molded product 20, for example, if the molded product 20 is a circular bowl, the pressing blade 45 has an annular shape, The edge of the bowl as the molded product 20 is cut into an annular shape.

When the upper table 34 is at the position shown in FIG. 1B and the moving table 32 is moved downward, the pressing blade 45 of the upper table 34 is
The resin sheet 23 around the corresponding molded product 20 is pressed against the upper surface of the lower mold table 33 from above and cut. As a result, the plurality of molded products 20 are cut and separated from the resin sheet 23 at the same time, that is, trimmed into individual punched molded products 20a.

The upper die table 34 has molded article holding means corresponding to each punched molded article 20a. The molded article holding means is preferably a vacuum suction means 46 as shown in FIG. 4 (a) or (b), but may be any means. The vacuum suction means 46 is connected to a vacuum pump (not shown) to hold the stamped product 20a by sucking the upper surface of the stamped product 20a. Thereby, the punched molded product 20a is held on the upper mold table 34. Then, by sliding the upper mold table 34 downstream along the guide member 35,
The stamped product 20 a is sent from the trimming unit 14 to the first transport unit 16.

The functions of the upper mold table 34 and the lower mold table 33 can be interchanged. In this case, as shown in FIG. 4C or 4D, the lower mold table 33 has a pressing blade 45 and a vacuum suction means 46, and slides along the guide member 35 to perform punch forming. The article 20a is sent to the first transport section 16. Further, the lower mold table 33 may be vertically moved by a driving device (not shown).

On the other hand, the resin sheet after the punched product 20a is trimmed, that is, the scrap sheet 23a
Is sent to the crushing unit 15 located downstream of the trimming unit 14 as waste. The crushing unit 15 is provided with a crusher 36, and the sent scrap sheet 23 is provided.
a is crushed into pieces to make resin waste. The resin waste is carried out from the sheet forming line 10 and sent to a processing step such as a resin recycling step to be recycled.

The first transport section 16 is provided with a first transport conveyor 37. Then, when the upper table 34 slides downstream along the guide member 35 and reaches just above the first conveyor 37, the molded product holding means releases the punched molded product 20a. As a result, the stamped molded product 20a is placed on the first conveyor 37.

A second transport conveyor 38 is disposed in the second transport section 17 located downstream of the first transport section 16, whereby the upstream first transport conveyor 37 is provided.
The punched molded product 20a transported by the above is transferred onto the second transport conveyor 38 and further transported downstream.

Subsequently, in the stacking section 18 on the downstream side of the second transport section 17, the punched molded products 20 a are cut one by one from the downstream end of the second transport conveyor 38 in FIG. Discharging means 40 for discharging one row at a time, a vertically movable stacking table 41 for stacking the discharged punched products 20a,
And a molded product stack 2 which is an accumulation of the punched molded products 20a.
And a pusher 42 for discharging 0b from the accumulation table 41. Here, the accumulation table 41 is moved in the vertical direction by a driving device (not shown), and is located at substantially the same height as the upper surface of the second transport conveyor 38 when located at the top dead center. It gradually descends each time it is accumulated one by one, and when a predetermined number of punched molded articles 20a are accumulated to form a molded article stack 20b, it descends to the bottom dead center. Then, when the accumulation table 41 is located at the bottom dead center, the height is almost the same as the product discharge means 43 of the product receiving section 19 on the downstream side. At this time, the pusher 42 moves from the upstream side to the downstream side, and pushes out the molded product stack 20b on the accumulation table 41 onto the product discharging means 43 to transfer the molded product stack 20b.

The product discharging means 4 of the product receiving section 19
Numeral 3 comprises a conveyor, a moving table and the like, and discharges the transferred molded article stack 20b to a post-process such as packaging and boxing, automatically or manually by an operator.

The resin sheet molding line 10 has a control device (not shown). The control device is a CPU, MP
U and other arithmetic means, semiconductor memory, storage means such as a hard disk, input means such as a keyboard and touch panel, CR
T, a display means such as a liquid crystal display, an I / O (input / output interface) and the like.
To control the operation of all or a part of. Note that the control device may be an independent device,
For example, a molding device in the resin sheet molding line 10,
As a part of a control device that controls a device such as a heating device, a device integrated with another control device can be used.

Next, the operation of the resin sheet molding line having the above configuration will be described.

FIG. 5 is a first view showing the operation of the resin sheet forming line on the downstream side of the shot holding section in the first embodiment of the present invention, and FIG. 6 is a view showing the resin in the first embodiment of the present invention. FIG. 7 is a second diagram showing the operation of the sheet forming line on the downstream side of the shot holding unit, and FIG. 7 is a diagram illustrating a state where the trimming position is moved in the resin sheet forming line according to the first embodiment of the present invention. .

First, in the state shown in FIG. 5A, the resin sheet 23 is stopped, the moving table 32 is moved downward, and the pressing blade 45 of the upper die table 34 and the lower die table 33 are moved. The molded product 20 is trimmed with the upper surface. Here, the molded product 20 trimmed by one trimming operation is, for example, 25 molded products 2 molded on the resin sheet 23 by one shot of the thermoforming device.
0.

On the other hand, the second conveyor 38 is stopped in a state where the punched product 20a trimmed by one trimming operation is placed. Also, the discharging means 4
0 is closed so that the punched molded product 20a is not discharged from the downstream end of the second conveyor 38.
The stacking table 41 is located at the bottom dead center, and the molded article stack 20b placed on the stacking table 41
Is pushed out onto the product discharging means 43 located on the downstream side of the stacking table 41 due to the pusher 42 moving rightward in the drawing. Here, the product discharging means 4
3 shall consist of a conveyor.

Next, as shown in FIG. 5B, the moving table 32 is moved upward, and the upper mold table 34 is moved.
Is moved upward. Here, all the punched molded products 20a trimmed by one trimming operation are held by the molded product holding means of the upper die table 34 and are raised together with the upper die table 34. Also, the guide member 3
5 are also moved upward.

On the other hand, the second conveyor 38 rotates,
The punched product 20a located at the right end in FIG. Further, the pusher 42 has moved to the left in the figure, and the stacking table 41 has been moved upward to reach the top dead center. Further, the product discharging means 43
Rotates to move the molded product stack 20b rightward in the figure. Then, the molded product stack 20b is packed,
It is sent automatically or manually by a worker to a post-process such as box packing.

Next, as shown in FIG. 6A, the upper mold table 34 moves downstream along the guide member 35 in a state where the molded product holding means holds the punched molded product 20a. It reaches directly above the first conveyor 37. On the other hand, the second conveyor 38 rotates and sequentially feeds the punched molded products 20a to the discharging means 40.

Then, when the discharging means 40 discharges the fed punched molded products 20a downward one row at a time, the punched molded products 20a are placed on the accumulation table 41. here,
The stacking table 41 is sequentially moved downward every time one row of the punched molded products 20a is discharged. As a result, the first punched molded product 20a is directly placed on the accumulation table 41, but the punched molded product 20a discharged afterwards is the punched molded product 20a already placed on the accumulation table 41. On top of each other. Then, the accumulation table 41
On the upper side, a plurality of, for example, five, one-row molded article stacks 20b are formed in a direction perpendicular to the plane of the drawing.

Next, as shown in FIG. 6B, when the molded product holding means of the upper die table 34 releases the punched molded product 20a, the molded product 20a is placed on the first conveyor 37. In this case, the molded product holding means releases the punched molded product 20a in a state where the moving table 32 is moved downward and the upper mold table 34 is moved downward to approach the first conveyor 37. It is desirable to do so. As a result, the plurality of punched molded products 20a are placed on the first conveyor 37 while maintaining the positional relationship with each other.
After the molded product holding means releases the punched molded product 20a, the moving table 32 is moved upward, and the upper mold table 34 is moved upward accordingly.
Return to the position indicated by. Thereafter, the upper mold table 34
Moves upstream. On the other hand, the resin sheet 23 is also started to be conveyed downstream, and the scrap sheet 23a is
6 and crushed.

The punched products 20a on the second conveyor 38 are all sent to the discharge means 40 and are accumulated on the accumulation table 41, and a plurality, for example, five, are arranged in the direction perpendicular to the paper of FIG. Only one row of the molded article stack 20b is formed. Then, the accumulation table 41 is moved downward and reaches the bottom dead center.

Next, as shown in FIG. 6C, the upper mold table 34 returns to a position immediately above the lower mold table 33 and stops. Then, the resin sheet 23 starts to be conveyed, and stops when the resin sheet 23 is conveyed by the length of the resin sheet 23 formed by one shot of the thermoforming device. by this,
All of the molded products 20 molded on the resin sheet 23 by one shot of the molding device are located at the positions shown in FIG.
It is stopped on the lower mold table 33. Further, the scrap sheet 23a is also fed into the crusher 36 by the length of the resin sheet 23 formed by one shot of the thermoforming device,
Crushed and stopped.

On the other hand, the first conveyor 37 rotates and
The punched product 20a is transferred onto the downstream second conveyor 38. Further, the discharging means 40 is closed, so that the punched molded product 20a is not discharged from the downstream end of the second conveyor 38. Then, the stacking table 41 is located at the bottom dead center, and the pusher 42 moves rightward in the figure to move the molded product stack 2 placed on the stacking table 41.
0b is pushed out onto the product discharge means 43 located on the downstream side.

The resin sheet molding line 10 conveys the punched molded product 20a by repeating the above-described operation.

Next, when the length of the resin sheet 23 formed by one shot of the thermoforming device is changed, the length of the shot holding portion 13 is adjusted by adjusting the position of the trimming device 31. The operation of making the resin sheet 23 formed by one shot an integral multiple of the length of the resin sheet 23 will be described.

First, in the state shown in FIG. 7A, the trimming device 31 is located on the most upstream side, and the centers of the moving table 32 and the lower mold table 33 are at the position B as shown in the figure. It is in. Note that a sensor 49 for detecting the position of the upper die table 34 is provided in the first transport section 16.

For example, in response to replacing the upper mold 27 and the lower mold 28 of the thermoforming device with large ones,
If the length of the resin sheet 23 formed by one shot of the thermoforming device is increased, the position of the trimming device 31 is adjusted so that the length of the shot holding portion 13 is formed by one shot of the thermoforming device. It is necessary to make the length of the resin sheet 23 to be an integral multiple of the length.

In this case, the trimming device 31 is
The length of the shot holding unit 13 is moved toward the downstream side of the guide means 30 shown in FIG. 3B by a distance that makes the length of the shot holding unit 13 equal to the length of the resin sheet 23 formed by one shot of the thermoforming device. Assuming that the distance is the maximum distance A that the trimming device 31 can move, the centers of the upper mold table 34 and the lower mold table 33 after being moved to the position C as shown in the drawing. is there.

On the other hand, the guide member 35 is
1, but the position of the first conveyor 37 is unchanged, so that the upper mold table 34 is
It is necessary that the position where the guide member 35 stops just above the conveyor 37 remains unchanged even if the guide member 35 moves. For this reason, the position where the upper mold table 34 stops immediately above the first transport conveyor 37 is detected by the sensor 49 disposed in the first transport unit 16.

Here, assuming that the sensor 49 detects the center position of the upper mold table 34, for example,
As shown in FIGS. 7A and 7B, the first conveyor 37 is disposed at a position D substantially corresponding to the center position. Then, when detecting that the center position of the upper mold table 34 has reached the position D, a detection signal is transmitted to a control device (not shown). Upon receiving the detection signal, the control device stops the movement of the upper mold table 34.

As a result, even if the trimming device 31 is moved, the upper table 34 remains in the first conveyor 37.
Immediately above, the punched molded product 20a can be released and transferred onto the first conveyor 37.

As described above, in this embodiment, the resin sheet molding line 10 can form the molded product stack 20b without manually handling the resin sheet 23 and the punched molded product 20a during the conveyance. . Therefore, the operating cost of the molded article conveying apparatus is low, and it is not necessary to increase the required area when installing the apparatus in a factory or the like.

Further, even if the length of the resin sheet 23 formed in one shot is changed by changing the mold of the thermoforming device, the positioning at the time of trimming is always accurate, and the throughput of the resin sheet forming line 10 can be reduced. It does not drop.

Next, a second embodiment of the present invention will be described. The description of the same components and operations as those of the first embodiment will be omitted.

FIG. 8 is an overall view of a resin sheet molding line according to a second embodiment of the present invention. FIG.
FIG. 8A is a schematic plan view of a resin sheet molding line, and FIG. 8B is a side view thereof.

In the present embodiment, the resin sheet molding line 10 includes a pulverizing section 15 in which the pulverizer 36 for pulverizing the scrap sheet 23a in the first embodiment is provided.
And a scrap take-up roll 51 downstream of the product receiving section 19. Then, the scrap sheet 23a sent from the trimming unit 14 is supplied to the first transport unit 1
6, passes below the second transport unit 17, the stacking unit 18, and the product receiving unit 19, and is wound on a scrap winding roll 51.

As described above, in this embodiment, since the resin sheet forming line 10 has the scrap take-up roll 51, the scrap sheet 23a can be easily conveyed to the resin regeneration step for recycling the scrap sheet 23a. can do.

Next, a third embodiment of the present invention will be described. The description of the same structures and operations as those of the first and second embodiments will be omitted.

FIG. 9 is an overall view of a resin sheet molding line according to a third embodiment of the present invention. Note that FIG.
FIG. 9A is a schematic plan view of a resin sheet molding line, and FIG. 9B is a side view thereof.

In the present embodiment, the resin sheet molding line 10 includes the discharging unit 40, the stacking unit 18 provided with the stacking table 41 and the pusher 42 in the first and second embodiments, and the product discharging unit 43. It does not have the product receiving section 19 to be disposed, and the first
The transport conveyor 37 is attached to the elevating device 52 and can move up and down. The position of the second conveyor 38 is the same height as when the first conveyor 37 is located at the bottom dead center.

When the molded product holding means of the upper die table 34 releases the punched molded product 20a, the molded product 20a is placed on the first conveyor 37. Here, in a state where the first conveyor 37 is stopped without rotating, it is sequentially moved downward each time the punched molded product 20a is released. As a result, the first punched molded product 20a is directly placed on the first transport conveyor 37, and thereafter, the discharged punched molded product 20a is placed on the punched product already loaded on the first transport conveyor 37. Molded product 2
0a is sequentially stacked and accumulated. Then, on the first conveyor 37, the width direction of the resin sheet 23 (FIG. 9)
In the vertical direction in (a)) and in the transport direction, for example, five rows each having five rows, 5 (pieces) × 5 (rows) = 25
The individual product stacks 20b are formed.

When a molded product stack 20b composed of a predetermined number of punched molded products 20a is formed, the first conveyor 37 is moved downward to reach the bottom dead center.
Subsequently, when the first conveyor 37 rotates, the molded product stack 20b is transferred onto the second conveyor 38 on the downstream side. Thereafter, the molded product stack 20b on the second conveyor 38 is sent to a post-process such as packaging and boxing, automatically by a conveyor or the like or manually by an operator.

As described above, in the present embodiment, the first
Since the transport conveyor 37 is not rotated but stopped and is sequentially moved downward each time the punched molded product 20a is released, a plurality of rows of molded product stacks 20b are formed on the first transport conveyor 37. Is done. Therefore, the operation of feeding the molded product stack 20b to the subsequent process becomes easy and the frequency is reduced, so that the efficiency of the resin sheet molding line 10 is improved.

Further, since the accumulating section 18 becomes unnecessary and the length of the resin sheet molding line 10 is shortened, the area for installation in a factory or the like can be reduced.

Next, a fourth embodiment of the present invention will be described. The description of the same structures and operations as those of the first to third embodiments will be omitted.

FIG. 10 is an overall view of a resin sheet molding line according to a fourth embodiment of the present invention. Note that FIG.
10A is a schematic plan view of a resin sheet molding line, and FIG. 10B is a side view thereof.

The resin sheet molding line 10 of the present embodiment
, The second transport unit 1 including the second transport conveyor 38
7 is a resin sheet 23 as shown in FIG.
At right angles to the transport direction. For this reason, the direction in which the first transport conveyor 37 rotates is also perpendicular to the transport direction of the resin sheet 23, and the molded product stack 20b on the first transport conveyor 37 is perpendicular to the transport direction of the resin sheet 23. The sheet is sent out and transferred onto the second conveyor 38. The other configuration and operation are the same as those of the third embodiment.

As described above, in the present embodiment, the second conveying section 17 is disposed at right angles to the conveying direction of the resin sheet 23, and the length of the resin sheet forming line 10 becomes shorter. Even if the length of the place where the line 10 is installed is short, it can be installed.

Next, a fifth embodiment of the present invention will be described. The description of the same structures and operations as those of the first to fourth embodiments will be omitted.

FIG. 11 is an overall view of a resin sheet molding line according to a fifth embodiment of the present invention. Note that FIG.
(A) is a schematic plan view of a resin sheet molding line, and FIG. 11 (b) is a side view thereof.

The resin sheet molding line 10 of the present embodiment
In FIG. 11, the transfer device 21 extends only up to the shot holding unit 13 and does not exist in the trimming unit 14 as shown in FIG. The trimming section 14 includes a pinch roller 5 that conveys the resin sheet 23 with both sides of the resin sheet 23 sandwiched from above and below.
0 is provided. Here, the transport speed of the resin sheet 23 by the pinch roller 50 is equal to the transport speed of the resin sheet 23 by the transport device 21. The other configurations and operations are the same as those of the fourth embodiment.

As described above, in the present embodiment, since the transport device 21 is not present in the trimming unit 14, the device in the trimming unit 14 is configured separately from the devices in the heating unit 11 and the forming unit 12. And can be manufactured. Therefore, the resin sheet molding line 10
Can be manufactured, transported, and installed in a plurality of parts, so that the equipment cost of the resin sheet molding line 10 can be reduced.

Next, a sixth embodiment of the present invention will be described. The description of the same structures and operations as those in the first to fifth embodiments will be omitted.

FIG. 12 is a cross-sectional view of a transfer device according to the sixth embodiment of the present invention.

In the present embodiment, the transfer device 21
As shown in FIG. 12, a chain is formed by connecting a number of chain pieces 71 having rollers on the upper and lower sides,
Each of the chain pieces 71 has a clip protruding to one side. Each of the clips includes a lower clip member 74 and an upper clip member 73 facing the lower clip member 74.

The upper clip member 73 has a claw 77 projecting downward, and the lower clip member 74 has a claw hole 78 for accommodating the claw 77. here,
The claw hole 78 may be a penetrated hole or a so-called blind hole with a lower end closed.

The lower clip member 74 is fixed to the chain piece 71, while the upper clip member 73 is fixed to the movable shaft 72 and can move up and down. Further, the movable shaft 72 is vertically movably inserted into a hole formed in the lower clip member 74 and is urged downward by a spring 75 in FIG. The clip member 73 is normally pressed against the lower clip member 74 by the force of a spring 75. Thereby, the upper clip member 73 and the lower clip member 74
Functions as holding means for holding the side end of the resin sheet 23.

The guide portion of the chain includes a base frame, a guide base 61, a chain guide 62 on the guide base 61, a top plate 64 on the chain guide 62, and the guide base 61, the chain guide 62, Connection bolt 67 for connecting and fixing top plate 64 to each other
Having. Furthermore, a chain bottom guide 63 is fixed on both sides above the guide base 61, and an upper roller guide 65 is fixed below the top plate 64 on both sides.

Here, the chain guide 62 is formed with a ridge and a ridge extending in the conveying direction of the resin sheet 23.
To guide the chains running in opposite directions along the transport direction of the chain. Further, the upper roller guide 65 sandwiches the roller above the chain piece 71 of the chain together with one of the ridges so that the chain piece 71 does not come off. Further, on the upper surface of the chain bottom guide 63, a concave strip extending in the conveying direction of the resin sheet 17 is formed so that the lower end of the chain piece 71 fits.

Then, in the transport device 21, the chain on the right side in FIG.
The chain on the left side in FIG. 12 is located on the opposite side of the resin sheet 23 with the chain guide 62 interposed therebetween, and is located on both sides of the conveying path of the resin sheet 23 so as to move upstream. Will be arranged.

Note that the chain on the right side in FIG.
Since the resin sheet 23 (not shown) is gripped, the distance between the upper clip member 73 and the lower clip member 74 is
It is open by the thickness of the resin sheet 23. In this case, the claw 77 of the upper clip member 73 is in a state of biting into the resin sheet 23 from above.

As described above, in the present embodiment, the transfer device 21 holds the resin sheet 23 with the clip protruding to one side, so that the resin sheet 23 is not damaged. Therefore, no residue is generated on the resin sheet 23, the contamination of the resin sheet molding line 10 can be prevented, and the conveyance of the resin sheet 23 is stabilized.
The precision of the thermoforming and the trimming in the trimming section 14 are improved.

Next, a seventh embodiment of the present invention will be described. The description of the same structure and operation as those of the first to sixth embodiments will be omitted.

FIG. 13 is an overall view of a resin sheet molding line according to a seventh embodiment of the present invention. Note that FIG.
(A) is a schematic plan view of a resin sheet molding line, and FIG. 13 (b) is a side view thereof.

The resin sheet molding line 10 of the present embodiment
, The guide member 35 is not attached to the moving table 32 of the trimming device 31, and the guide member 35 a having the same configuration as the guide member 35 is
Attached to. Also, the upper mold table 34a attached to the moving table 32 has no molded article holding means.

A moving means 54 is attached to the guide member 35a so as to be slidable along the guide member 35a. Further, the moving means 54 is provided as a molded article holding device having molded article holding means. The holding device 53 is attached to be vertically movable.

In the present embodiment, the moving table 3
When the workpiece 2 is moved downward to trim the molded product 20, the holding device 53 is located on the downstream side of the trimming unit 14 together with the moving unit 54. When the trimming is completed and the upper mold table 34a is moved upward, the moving means 54 slides leftward in the figure along the guide member 35a, and the holding device 53 moves the lower mold table 33.
It is inserted between the upper punched product 20a and the upper mold table 34a.

Next, the holding device 53 is moved downward by the moving means 54 so as to come into contact with the top of the stamped product 20a as shown in FIG. Hold. Then, after the holding device 53 is moved upward by the moving means 54, the moving means 54 slides rightward in the drawing along the guide member 35a, and thus reaches above the first transport conveyor 37.

Next, after the holding device 53 is moved downward by the moving means 54, the punched product 20a is released. Thus, the stamped product 20a is placed on the first conveyor 37. Thereby, the first punched molded product 2
0a is directly placed on the first conveyor 37, and thereafter, the punched products 20a discharged are sequentially placed on the punched products 20a already placed on the first conveyor 37. Stacked and accumulated. Then, on the first transport conveyor 37, a plurality of rows, for example, 5 rows each, in the width direction and the transport direction of the resin sheet 23, 5 rows, 5 (pieces) × 5
(Row) = 25 molded article stacks 20b are formed.
The other configurations and operations are the same as in the fourth embodiment.

As described above, in the present embodiment, the guide member 35a is attached to the first transport section 16, and the holding device 53 for holding the stamped product 20a is provided by the guide member 35.
a, the configuration and operation of the moving table 32 and the upper table 34a are simplified. Therefore, the trimming device 3
1, the manufacturing cost and running cost are reduced.

Next, an eighth embodiment of the present invention will be described. The description of the same structures and operations as those of the first to seventh embodiments will be omitted.

FIG. 14 is an overall view of a resin sheet molding line according to an eighth embodiment of the present invention. FIG.
14A is a schematic plan view of a resin sheet molding line, and FIG. 14B is a side view thereof.

The resin sheet molding line 10 of the present embodiment
5, the trimming device 31 has an outer frame 55, and a guide member 35a is attached to the outer frame 55. The other configuration and operation are the same as in the seventh embodiment.

As described above, in the present embodiment, since the guide member 35a is attached to the outer frame 55 of the trimming device 31, even when the position of the trimming device 31 is adjusted, the relative position between the trimming device 31 and the guide member 35a is adjusted. The positional relationship is unchanged. Therefore, even when the position of the trimming device 31 is adjusted by changing the length of the resin sheet 23 formed in one shot of the thermoforming device, it is necessary to adjust the amount by which the moving means 54 slides along the guide member 35a. There is no resin sheet molding line 10
Operation becomes easier.

The present invention is not limited to the above embodiments, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0111]

As described above in detail, according to the present invention, in the resin sheet forming line of the present invention, a conveying device for intermittently conveying a resin sheet, and a molded article formed on the resin sheet. A molding device, a trimming device disposed downstream of the molding device movably in a conveying direction of the resin sheet, and trimming the molded product; and a trimmed molded product disposed downstream of the trimming device and trimmed. Conveyor, and a molded product holding device that holds the molded product trimmed by the trimming device and transfers the molded product onto the transport conveyor, wherein the interval between the molding device and the trimming device is a molding device. Can be adjusted to be an integral multiple of the length of the resin sheet formed in one shot.

In this case, a molded product stack can be formed without manually handling the resin sheet or the trimmed molded product during the conveyance.
Therefore, the operating cost of the resin sheet molding line is low, and there is no need to increase the area required for installation in a factory or the like.

Further, even if the length of the resin sheet formed in one shot is changed by changing the mold of the thermoforming apparatus, the positioning at the time of trimming is always accurate, and the throughput of the resin sheet forming line is reduced. Not even.

In another resin sheet molding line of the present invention, the resin sheet molding line is further provided downstream of the trimming device.
And a pulverizer for pulverizing the resin sheet after the molded article has been trimmed.

In this case, the trimmed resin sheet is sent to a pulverizer as waste, and is pulverized into resin waste. The resin waste is carried out of a resin sheet molding line, sent to a processing step such as a resin recycling step, and recycled.

In still another resin sheet molding line according to the present invention, the molded article holding device is integral with an upper mold table of the trimming apparatus having a cutting blade for trimming the molded article.

In this case, since the operation of the molded article holding device is simple and the operation time is short, the throughput of the resin sheet molding line is improved.

In still another resin sheet molding line of the present invention, the guide member is attached to the trimming device.

In this case, since the relative positional relationship between the trimming device and the guide member does not change, the operation of the resin sheet forming line becomes easy even when the position of the trimming device is adjusted.

[Brief description of the drawings]

FIG. 1 is an overall view of a resin sheet molding line according to a first embodiment of the present invention.

FIG. 2 is a conceptual side view of a conventional resin sheet molding line.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is an enlarged view of a punching blade in the trimming device.

FIG. 5 is a first diagram showing an operation of the resin sheet molding line on the downstream side of the shot holding unit in the first embodiment of the present invention.

FIG. 6 is a second diagram illustrating the operation of the resin sheet molding line on the downstream side of the shot holding unit according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a state where a trimming position is moved in a resin sheet molding line according to the first embodiment of the present invention.

FIG. 8 is an overall view of a resin sheet molding line according to a second embodiment of the present invention.

FIG. 9 is an overall view of a resin sheet molding line according to a third embodiment of the present invention.

FIG. 10 is an overall view of a resin sheet molding line according to a fourth embodiment of the present invention.

FIG. 11 is an overall view of a resin sheet molding line according to a fifth embodiment of the present invention.

FIG. 12 is a cross-sectional view of a transfer device according to a sixth embodiment of the present invention.

FIG. 13 is an overall view of a resin sheet molding line according to a seventh embodiment of the present invention.

FIG. 14 is an overall view of a resin sheet molding line according to an eighth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Resin sheet molding line 20 Molded product 21 Conveying device 23 Resin sheet 31 Trimming device 34, 34a Upper die table 35, 35a Guide member 36 Crusher

Claims (5)

[Claims] 1. A conveying device for intermittently conveying a resin sheet, (b) a molding device for molding a molded article on the resin sheet, and (c) a conveying device for conveying the resin sheet downstream of the molding device. A trimming device arranged movably in the direction to trim the molded product; (d) a conveyor arranged downstream of the trimming device for transporting the trimmed molded product; and (e) the trimming. A molding product holding device that holds the molded product trimmed by the device and transfers the molded product onto the transport conveyor; and (f) an interval between the molding device and the trimming device is formed by one shot of the molding device. A resin sheet molding line that can be adjusted to be an integral multiple of the length of the resin sheet. 2. The apparatus is provided downstream of the trimming device.
The resin sheet molding line according to claim 1, further comprising a crusher configured to crush the resin sheet after the molded product is trimmed. 3. The molded article holding device includes: a guide member extending from the trimming device to a position above the transport conveyor; and a guide member that slides along the guide member to hold the trimmed molded product. The resin sheet molding line according to claim 1, further comprising a transfer holding unit. 4. The resin sheet molding line according to claim 1, wherein the molded product holding device is integrated with an upper mold table of the trimming device including a cutting blade for trimming the molded product. . 5. The resin sheet molding line according to claim 1, wherein the guide member is attached to the trimming device.