JPS6249841B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a molding machine that continuously extrudes a sheet-like product from a T-die attached to an extruder, and a molding machine that continuously extrudes a sheet-like product from the same molding machine and molds the sheet-like product extruded from the same molding machine into a simple container such as a cup. It relates to a device that has a line of secondary processing machines that perform secondary processing, and in particular is located between the above-mentioned molding machine and the secondary processing machine, and is used to feed sheet-like products formed by the molding machine to the secondary processing machine. Regarding a conveyance device.

In an apparatus in which the molding machine and the secondary processing machine are integrated into a line, the sheet-like material is continuously supplied from the molding machine to the secondary processing machine, but during the processing and forming process of the secondary processing machine, the sheet-like material is Feeding is not necessary, and the feeding of sheets, etc. is normally stopped. Therefore, the sheet-like material supplied to the secondary processing machine is devised so that the process of feeding and stopping is repeated. For example, during the molding process of a secondary processing machine, an extruder that extrudes a sheet-like material is moved in the opposite extrusion direction at the same speed as the extrusion speed of the sheet-like material, so that the sheet-like material is relatively fed to the secondary processing machine. There is a way to reduce the speed to zero.
Referring to FIG. 1, the conventional example will be explained by taking the case of transporting sheets as an example. 1 is an extruder, 2 is a movable frame that advances and retreats in the extrusion direction on a rail 4 of a bed 3 fixed on the floor surface by a T-die. It is fixed to 5.
The extruder 1 and the T-die 2 are connected by a transport pipe 6 that is bent as the movable frame 5 moves forward and backward, and during the processing process of the secondary processing machine 7, the secondary processing machine 7 In order to prevent the sheet 8 from being fed into the sheet 8, the T die 2 is moved back at the same speed as the extrusion speed v of the sheet 8 extruded by the extruder 1, and at a retraction speed -v in the counter-extrusion direction. Processing machine 7
The speed V is set to zero (V=0).

Therefore, the conveying device 10 that carries the sheet 8 on the endless belt 9 between the extruder 1 and the secondary processing machine 7 also continuously processes the sheet 8 extruded from the extruder 1 intermittently. A device to send it to machine 7 becomes necessary. Therefore, the conveying device 10 is connected to the pedestal 5 on which the T-die 2 is attached, and is composed of a moving part 11 that moves in synchronization with the advance and retreat of the pedestal, and a fixed part 12 fixed to the floor surface.
and a roll 13 that rotates continuously on the fixed part 12.
A roll 14 that rotates intermittently is attached to drive and guide the endless belt 9. The roll 1 accompanying the movement of the pedestal 5
3 and 14, the change in the distance L between the fixed portion 12
The sheet 8 is intermittently supplied to the secondary processing machine 7 by adjusting the adjustment rolls 15 and 16 provided on the sheet 8 by moving them up and down as indicated by arrows a as shown by imaginary lines.

However, moving the moving part 11 connected to the frame 5 on which the T-die 2 is attached is not only disadvantageous in terms of weight, but also involves the piping, wiring, etc.
Moving other auxiliary equipment is a very complicated and troublesome task.

Further, the sheet is discharged from the T-die 2 in a horizontal direction, and the same direction as the moving direction of the belt 9;
Moreover, since the T-die 2 moves forward and backward in the horizontal direction intermittently, these three operations influence each other, making the operation complicated.

Furthermore, since the belt 9 for conveying the sheet operates to absorb the variation in the distance L between the rolls 13 and 14 that changes due to the moving part 11, it is frequently bent and its lifespan is shortened.

To explain the conventional conveying device with reference to FIGS. 2 to 4, reference numeral 20 denotes a fixed belt pulley T.
An endless belt 21 is provided approximately at the center of the die 2 so as to be perpendicular to the direction in which the sheet 8 is transported, and is hung thereon to support the sheet 8 so that it does not hang down from below and to transport the sheet 8 to a secondary processing machine. . 22
is a belt pulley for adjusting the width, and as shown in FIG. 4, it is rotatably supported in a cantilevered state by a pair of plates 23 and 24 facing each other in the belt width direction.
The plate 23 is attached to one end of the left-hand thread 25, and the plate 2
4 are screwed into one end of the right-hand thread 26, respectively. The other ends of the left-hand thread 25 and the right-hand thread 26 each have an adjusting nut 27 with a left-hand thread on one side and a right-hand thread on the other side.
The adjusting nut 27 is coaxially screwed into the adjusting nut 27.
By rotating the plates 23 and 24, the plates 23 and 24 are pushed and pulled, and the facing width W is changed. An endless belt 28 is hung on the pulley 22, and overlaps the fixing endless belt 21 at both edges A and B, and the dimension W can be a predetermined sheet width. Reference numeral 29 is a guide shaft that allows the plates 23 and 24 to always move parallel to each other to prevent galling or the like from occurring. 30 is a clip that connects the plates 23 and 2.
It is attached to an endless chain 32 which meshes with a sprocket 31 which is rotatably supported by a sprocket 4. The edges of the sheet 8 on the belts 21 and 28 are gripped, and the sheet 8, which moves in synchronization with the belts 21 and 28, is transported in the discharge direction (rightward direction) and wrinkles etc. are removed in the width direction of the sheet 8. I'm holding onto it so I can't.

Therefore, when changing the width of the sheet, by moving the plates 23 and 24 in the same way as the width adjustment pulley 22, the endless chain 3
2, change the running position in the sheet width direction, that is, change the dimension W.
In addition, the width W of the belt on which the sheet 8 is placed and transported is changed.

As explained above, when changing the width of a sheet-like object, the width of the belt that receives the sheet-like object from below and transports it to the secondary processing machine can be changed between a fixed belt with a constant belt width and a fixed belt with the same width. It is very complicated and difficult to operate because it combines adjustment belts that overlap both edges in the width direction and change the belt width.Furthermore, the sheet-like object transferred on the belt is The overlapping portion leaves a mark, and the work is troublesome because both the running position of the clip that grips the edge of the sheet-like object and the width of the belt must be controlled at the same time.

The purpose of the present invention is to eliminate disadvantages such as the problem of moving parts in the conveyor device or the problem of adjusting the width of the clip or belt when changing the width of a sheet material, which is seen in conventional devices, and to simplify the operation. It is an object of the present invention to provide a conveyance device in an apparatus in which a production line is formed from a molding machine to a secondary processing machine.

Next, referring to FIGS. 5 to 8, one embodiment of the present invention will be explained by taking as an example a case in which the width of a sheet is adjusted. 50 is a T die, and molten resin is passed from an extruder (not shown) into a sheet 51. It is extruded.
The T-die 50 is mounted on a pedestal 52 so that the slit-shaped discharge port faces downward so that the sheet 51 is discharged downward. The pedestal 52 is used to prevent the sheet 51 continuously extruded from the T-die 50 from being sent to the secondary processing machine 53 during the forming process of the secondary processing machine 53.
At the same speed as the extrusion speed and in the opposite direction, a stroke S is made on the rail 56 of the conveying device 55 by the pneumatic cylinder 54 or the like from the position shown by the imaginary line 50a.
(moves to the left in the figure). An endless belt 57 carries the sheet 51 discharged from the T-die 50 and conveys it to the secondary processing machine 53, and is hooked around the belt pulley 60 to almost the full width of the pulley.

The belt pulley 60 is attached to the frame 58 in a direction perpendicular to the running direction of the seat 51 (indicated by arrow b).
and 59, and is integrally formed and extends almost completely across the opposite widths of the frames 58 and 59, and is rotatably supported by the frames 58 and 59. The frames 58 and 59 are plate-like bodies that are provided parallel to each other and facing each other in parallel to the sheet running direction. Therefore, the conventional
There is no need to adjust the belt width by combining a fixed pulley and an adjustment pulley, and no marks are left on the seat due to overlapping belts.

61 is a clip that grips the edge of the sheet 51 and is attached to an endless chain 65 that meshes with a sprocket 64 rotatably supported in a cantilevered manner by a pair of plates 62 and 63 facing each other in parallel in the belt width direction. The chain 65 moves in synchronization with the moving speed of the belt 57 by a drive device (not shown), conveys the sheet 51 in the extrusion direction (in the direction of the arrow), and adjusts the width according to the sheet width adjustment described above. This is to spread the sheet 51 in the direction. The chain 6 is changed by changing the running position of the clip 61 in the sheet width direction, that is, by changing the sheet width.
5, the traveling position of the pair of plates 62 is changed.
It is only necessary to change the facing width H of the plates 62 and 63, and the plates 62 and 63 have a left-hand thread 66 and a right-hand thread 6, respectively.
7, and rotates an adjusting nut 68 which is threaded coaxially with the other ends of the left-hand thread 66 and right-hand thread 67 and has a left-hand thread on one side and a right-hand thread on the other side. Alternatively, the left-hand thread on one side, the right-hand thread on the other side, and their adjusting nuts may be mounted so as not to rotate relative to each other, and the adjusting nut may be rotated. Reference numeral 69 denotes a guide shaft provided so that the plates 62 and 63 move while always maintaining parallelism.

As explained above, when changing the seat width, it was necessary to change the width of the belt that carries the seat as in the past, but with the present invention, that effort can be saved and all you have to do is change the running position of the clip. Fortunately, that annoyance is gone.

This is because the drawback of the conventional device is that the T-die pushes out the sheet 8 in the horizontal direction as shown in FIG. The clip supports the sheet 8 and grips the sheet 8 at a portion close to the T-die 2. In other words, the horizontal running line of the sheet crosses the clip running line at C in the figure. The cause was hot.

However, as described above, in the present invention, the discharge port of the T-die is directed downward, and the running line in the height direction of the sheet material and the running line of the clip are separated from each other so as not to interfere with each other. The drawbacks are eliminated, and the running position of the clip in the width direction of the sheet-like object can be changed regardless of the width of the T-die.

In addition, complicated operations involving three factors: the horizontal forward and backward movement of the T-die, the sheet-like material discharged horizontally from the T-die, and the moving speed of the belt can also be performed with the discharge port facing downward and the sheet-like material being horizontally discharged. Since the product is not discharged at any time, only the movement of the T-die and the speed of the belt can be controlled, making the operation easier.

Furthermore, the belt has no complicated bends and is only driven by rotation, resulting in a longer service life.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a conventional device. FIG. 2 is a plan view of the conveyance section of the conventional device. FIG. 3 is a side view of the conveyance section. FIG. 4 is a cross-sectional view of FIG. 3. 5 to 8 are views showing one embodiment according to the present invention, and FIG. 5 is a side view showing the whole. FIG. 6 is a plan view of the conveyance device. FIG. 7 is a cross-sectional view of FIG. 6. 8th
The figure is a cross section of Figure 7. 50... T die, 51... Sheet, 55... Conveying device, 57... Endless belt, 58, 59
... Plate frame, 60 ... Belt pulley, 61
...Clip, 62, 63...Plate, 65...
...Endless chain, 66...Left-hand thread, 67...
Right-hand thread, 68...adjustment nut.

Claims (1)

[Claims] 1. A sheet-like material 5 from a T-die 50 attached to an extruder.
1 and a secondary processing machine 53 that performs secondary processing on the sheet-like material 51 extruded from the same forming machine, between the forming machine and the secondary processing machine 53. There is a sheet-like material 51
In the conveying device 55 that feeds the sheet material to the secondary processing machine 53, both ends are rotatably supported by a pair of fixed plate-shaped frames 58 and 59 that face each other in parallel, and are perpendicular to the running direction of the sheet material 51. The pair of frames 58,
59, and a belt pulley 60 extending almost fully across the facing width of the belt pulley 60, which is hung over the entire width of the belt pulley 60, receives the sheet-like material 51 discharged downward from the T-die 50, and transfers it to the secondary processing machine 53. an endless belt 57 to be transferred to the secondary processing machine 53; and a plurality of clips 61 for gripping both edges in the width direction of the sheet-like material 51 placed on the endless belt 57 and transferred to the secondary processing machine 53. , and the endless belt 57
a pair of endless chains 65 provided near both edges of the sheet-like material 51 that moves in sync with the movement of the sheet-like material 51; and a pair of parallel plates 62, 63 facing each other in the width direction of the sheet-like material 51. The sprocket 64 meshed with the endless chain 65 is rotatably supported, and each of the pair of plates 62 and 63 is screwed onto one end of the left-hand thread 66 and the right-hand thread 67. Attach the other end of the screw 67 on the same axis so as not to rotate relative to each other,
By rotating an adjustment nut 68 having a left-hand thread on one end and a right-hand thread on the other end, or by not rotating the left-hand thread 66 on the first side and the right-hand thread 67 on the other side and their adjustment nuts 68 relatively. Chain running position for changing the running position of the endless chain 65 in the width direction of the sheet-like material 51 by rotating the adjustment nut 68 to change the facing width of the pair of plates 62 and 63. A sheet material conveying device consisting of a changing device.