JPS6320737B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for supplying sheet materials such as tire constituent materials, and more specifically, the present invention relates to a method for supplying sheet materials such as tire constituent materials, and more specifically, a method for supplying sheet materials of a certain length to the tip and end portions thereof. The present invention relates to a method for supplying sheet materials that can be reliably conveyed to the next process without any problems.

[Prior art]

Conventionally, this type of feeding method involves releasing a certain length of rubber sheet material discharged from a kneading machine from a mold, as disclosed in, for example, Japanese Patent Publication No. 57-14978 and Japanese Patent Publication No. 57-41423. After soaking in the mold release agent in the agent applicator, it is transported to the next process on the dryer's rack conveyor and dried in the dryer.After that, the sheet material is folded and stacked on the pallet for the next process. was.

However, in such a conventional sheet material supply method, when the sheet material discharged from the release agent application device is transferred to the rack conveyor of the drying device,
Because the sheet material was transported by simply setting a speed ratio between the conveyance speed of the sheet material and the moving speed of the rack conveyor, the physical properties of the sheet material (sheet rubber), that is, the elongation, shrinkage, and surface roughness after application of the release agent, were Due to such factors, the lengths hung on the hanger bar of the rack conveyor are different, and in particular, the leading and trailing ends of the sheet material are hung too much and dragged in the drying equipment, so the leading edge of the sheet material is stretched before being loaded onto the pallet in the next process. There was a problem that the end and end parts were cut, resulting in product defects.

In addition, in the process of placing sheet materials on a pallet, if the tip and end portions of the sheet material sag as described above, the weight of the rubber is large, and manual loading is extremely laborious and dangerous. It was accompanied by

On the other hand, in the case of equipment equipped with an automatic sheet material gripping device, there is a problem in that the drum of the automatic gripping device often shakes, and the unmanned train has to stop frequently, resulting in extremely low work efficiency. Ta.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to effectively prevent the tip and end portions of the sheet material from being overloaded on the rack conveyor. To provide a sheet material supply method that prevents product defects and allows safe and easy loading work on pallets for the next process.

[Structure of the invention]

In order to achieve the above object, the present invention immerses the sheet material conveyed from the molding process in a mold release agent in a mold release agent coating device, and then sequentially transports it to the rack bar of a drying device. In the method for supplying sheet materials, which are sequentially folded and stacked on a pallet for the next step after drying, the tip portion of the sheet materials carried out from the release agent coating device;
The end portions of the sheet material are detected by detectors, and the feeding speed of the rack bar of the drying device is controlled to be faster than the normal feeding speed for a certain period of time at the leading end of the sheet material and the end portion of the sheet material. The gist of this method is to reduce the length of the leading end and end end of the sheet material to be hung on the rack bar of the drying device by a predetermined distance.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 shows a layout diagram of the entire train of a sheet-like rubber material in which the present invention is implemented, and 1 shows the arrangement of the rubber material supplied from a forming process (not shown) (kneading machine, etc.) into a sheet material W of a predetermined width. An extrusion device (extrusion roll) 2 is used to transfer the sheet material W extruded from the extrusion device 1 to a release agent coating device 30.
0 is a transport conveyor that continuously supplies the release agent coating conveyor 4 in the release agent tank 3; conveyor), Q indicates the mold release agent in the mold release agent tank.

As shown in the figure, the release agent coating conveyor 4 is composed of a presser conveyor 7 and a conveyor 8, which are arranged in an upward direction toward the drying conveyor 5. The sheet material W is configured to be conveyed while being held in a sandwich-like manner.

The conveyor belt 7a of the presser conveyor 7 is
A drive pulley 1 rotationally driven by a drive motor 9
0 and a driven pulley 11, and the conveyor 8 has a drive pulley 13 rotated by a drive motor 12, a driven pulley 14, a head pulley 15, a support pulley 16, and a tension pulley 1.
7 and 7. Note that the drive motor 9 and the drive motor 12 are rotationally driven in synchronization.

The driving pulley 13 and the driven pulley 14 are configured to drive the conveyor belt 18 in a pinched state, and the head pulley 15 is connected to a rack bar 19 disposed at a predetermined interval on the drying conveyor 5.
It is placed as desired above. Therefore, the sheet material W coated with the release agent, which has been conveyed in a sandwich-like manner by the presser conveyor 7 and the transport conveyor 8, is guided by the head pulley 15 to the rack bar 19 provided on the drying conveyor 5 of the drying device 6. After being sequentially carried out and further dried by a heating device (not shown) in the drying device 6, the sheets are stacked on the pallet 20 in a folded state.

Further, 21 is a drive motor that rotationally drives the drying conveyor 5.

A detector 30 equipped with a timer (not shown) is provided at the discharge end 4a of the release agent application conveyor 4 to detect the leading edge of the sheet material W when the sheet material W is transferred to the drying conveyor 5. ing. When this detector 30 detects the leading edge of the sheet material W, it controls the drive motor 9 of the release agent coating conveyor 4 and the drive motor 21 of the drying conveyor 5 for a certain period of time by operating a timer to speed up the sheet material W. The length of the sheet material W hanging on the rack bar 19 is controlled to be short by changing the ratio to a regular speed ratio (the moving speed of the drying conveyor 4 is made faster than the normal speed).

For example, as shown in FIG.
A detection bar 32 is provided which can rotate around 1 as a fulcrum,
A detection terminal 33 is attached to the base end 32a of this detection bar 32.
The limit switch 34 is configured to operate when the tip of the sheet material W contacts the detection bar 32 and rotates the detection bar 32.

Note that the detector 30 is not limited to the above-mentioned embodiment, and it is also possible to perform optical detection using a phototube or the like.

Next, the operation of the embodiment of the invention configured as described above will be explained.

First, a certain amount of rubber material supplied from a molding process (not shown) (kneader, etc.) is molded into a sheet material W by an extrusion device 1, immersed in a mold release agent Q in a mold release agent tank 3, and then passed through a presser. The tip of the sheet material W is detected by the detector 30 when the sheet material W is held between the conveyor 7 and the transport conveyor 8 in a sandwich-like configuration and transferred to the rack bar 19 of the drying conveyor 5.

When the leading edge of the sheet material W is detected by the detector 30, the rotational speed of the drive motor 21 that drives the drying conveyor 5 is made faster than the normal speed for a certain period of time to increase the moving speed of the rack bar 19, as described above. , the tip of the sheet material W (l1 in FIG. 1) is the first
As shown in the figure, it will be in a shallowly applied state. After a certain period of time has elapsed, the sheet material W is stretched in a normal state as shown at l2 in FIG. 1, and then shallowly hung again at the rear end l3 of the sheet material W.

The rear end of the sheet material W is detected by counting one batch in the not-illustrated molding process, and after counting up the batch time in the molding process, the rotational speed of the drive motor 21 that drives the drying conveyor 5 is determined as described above. This is done by increasing the moving speed of the rack bar 19 by making it faster than the normal speed for a certain period of time.

By performing the above operations for each batch or each rod, the leading and trailing ends of the sheet material W can be efficiently transported to the next process without being dragged in the drying device 6 or the like.

〔Effect of the invention〕

This invention involves soaking the sheet material conveyed from the molding process in the mold release agent in the mold release agent application device as described above, and then sequentially transporting it to the rack bar of the drying device.
In this method of supplying sheet materials, the sheet materials are dried in the drying device and then sequentially folded and stacked on a pallet for the next process, wherein the leading end of the sheet materials carried out from the release agent application device; The end portions of the sheet material are detected by detectors, and the feeding speed of the rack bar of the drying device is controlled to be faster than the normal feeding speed for a certain period of time at the leading end of the sheet material and the end portion of the sheet material. Since the length of the tip and end of the sheet material to be hung on the rack bar of the drying device is set shallow by a predetermined distance, it is possible to prevent the tip and end of the sheet material from being hung too much on the rack conveyor. This effectively prevents product defects, while also making it possible to load sheets onto pallets in the next process safely and easily.Furthermore, even in equipment equipped with an automatic gripping device, sheet materials can be This has the effect of improving productivity without making any mistakes in grasping.

[Brief explanation of the drawing]

FIG. 1 is a front view of a sheet material supply device embodying the present invention, and FIG. 2 is an enlarged front view of a detection device. 6...Drying device, 19...Rack bar, 20...
...pallet, 30...detector, 300...mold release agent coating device, G...mold release agent, l1...tip end of sheet material, l3...end portion of sheet material, W...sheet material.

Claims (1)

[Claims] 1 After immersing the sheet materials conveyed from the molding process in the mold release agent in the mold release agent applicator, they are sequentially transported to the rack bar of the drying device, and after being dried in this drying device, they are placed on the pallet for the next process. In the method for supplying sheet materials in which the sheet materials are sequentially folded and stacked, a detector detects the leading end and the end of the sheet materials carried out from the release agent coating device, respectively, and the drying process is performed. The feeding speed of the rack bar of the device is controlled to be faster than the normal feeding speed for a certain period of time at the leading edge of the sheet material and the trailing end of the sheet material, and the leading edge and trailing end of the sheet material that is hung on the rack bar of the drying device is controlled. A method for supplying sheet material, characterized in that the length of the sheet material is multiplied by a predetermined distance.