JPH0315514A - Automatic sheet supplying device for vacuum molding machine - Google Patents

Abstract

PURPOSE:To enhance production efficiency by consuming a rolled sheet, and issuing an alarm to inform to an operator when a cut sheet of a predetermined length is not obtained. CONSTITUTION:When the consumption of a rolled sheet is advanced and a predetermined length cannot be eventually obtained, the rear end of the sheet is disposed between a photoelectric tube 9 and a cutting blade. In this case, the tube 9 reacts due to no interruption of an optical axis 8 by the sheet, and generates an alarm by an alarm unit 10 to an operator. When the length of a cut sheet is altered, the position of a photoelectric tube 5 is altered. Since the same tube 9 as the tube 5 is also moved, it can always detect lack of predetermined length. Thus, the operator can execute stepwise replacement of the sheet by a stepwise replacing unit 11 provided separately.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an automatic sheet feeding device for a vacuum forming machine used for manufacturing interior parts of automobiles, railway vehicles, aircraft, etc. by a vacuum forming method.

(Prior Art) A continuous vacuum forming machine used in a continuous vacuum forming method generally has a sheet feeding device, a heating device, and a forming device. be intimidated. Before production, a molder sets a roll on a roll truck and sets the end of the roll sheet on a sheet feeding device. When the user presses the start button to start the user, the sheet supply device feeds out the rolled sheet and cuts it into sheets of predetermined length.

The cut sheet is fixed to a conveyor chain and conveyed to a heating device. The cut sheet is heated to a predetermined temperature in the heating device, and then conveyed to the shaping device.

A vacuum mold is installed in the molding device, and a product is obtained by pushing up the cut sheet from below and drawing a vacuum.

The basis of vacuum molding is to soften the thermoplastic resin by heating and create a vacuum inside the vacuum mold, thereby transferring the shape of the mold using large gas pressure. In the steady state of continuous vacuum forming equipment operation, there are always cut sheets in the sheet supply device, heated cut sheets in the heating device, and cut sheets being formed in the forming device. The cut sheets are conveyed to the next process at the same time.

Therefore, it is a method in which a large number of products are formed one after another in a short takt time. Therefore, the frequency of punishment for cut-off materials is high, and even though the prepared roll sheet 1 is being consumed rapidly, Jubei has a cut-off 1.
The molder was aware of the lack of supply. This means that up to the final Vc position, in other words, in the sheet 1 supply device and in the heating device, the devices are operating in their own way even though there is no cut sheet, and this results in time and power costs. It was a waste of time. In addition, general continuous vacuum forming machines are capable of changing stages of multiple roll sheets in order to accommodate high-mix, low-volume production, and the forming machine can quickly change stages when they feel the need to do so. However, it is necessary to engage in the changeover work after knowing that there is no cut sheet in the molding device, which has the drawback of taking time to change the changeover. Step change is a technical term used by manufacturers.
A term used by businesses that handle relatively large equipment and products, and refers to the replacement or removal of equipment, molds, materials, jigs, etc. for production or maintenance purposes. The ideal stage change is to be completed within takt time without stopping production. However, in the conventional method, in order for the executor to know the consumption of the roll sheet, he must change the stage after knowing that there is no sheet material in the forming equipment, which is disadvantageous in terms of time and power costs, and has the disadvantage of being inferior to production efficiency. It had

(Problems to be Solved by the Invention) The purpose of the present invention is to provide a vacuum forming machine that can increase production efficiency by automatically detecting the consumption of roll sheets and notifying the person using the remaining amount of paper. automatic see} (31.
The goal is to provide a supply device.

(Means for Solving the Problems) The present invention provides a continuous vacuum or forming sheet feeding device comprising a sheet feeding device, a heating device, and a shaping device, in which the sheet feeding device holds a rolled sheet to a predetermined length. It has the ability to supply cut sheets to a heating device after cutting them into strips, and is characterized by notifying the shaper as an alarm when the roll sheet is consumed and a cut sheet of a predetermined length can no longer be obtained. This relates to an automatic sheet feeding device.

The sheet feeding device cuts the rolled sheet into cuts of a predetermined length. When the roll sheet 1 is consumed and becomes too short to obtain a cut sheet of a predetermined length, the consumption of the roll sheet is complete, and it becomes necessary to change to another sheet. Therefore, in order to know the consumption of the roll sheet as soon as possible, if it is detected in front of the cutting blade, it is possible to sequentially feed the next changed roll sheet to the process without leaving the subsequent process idle.

The basic structure of the molding apparatus used in the present invention will be explained below with reference to the drawings. FIG. 1 is a schematic diagram of a continuous feed type device equipped with a sheet feeding device of the present invention. Three roll sheets 1 are prepared. The rolled sheet 1 slides on a guide shooter 2 and is conveyed to a cutting blade 4 by a feed roll 3. There is a phototube 5 at the tip, and the optical axis 6 of the phototube 5
When the tip of the roll sheet intercepts the flow, the feed roller stops and the cutting blade runs across the roll sheet to create a cut sheet. The distance between the optical axis of the phototube and the cutting blade corresponds to a predetermined distance between the two. Slits 1 and 7 are provided in the guide shooter, and a phototube 9 is installed so that an optical axis 8 passes through the slits. The phototube 9 has a structure in which it can be moved in conjunction with the four phototubes 5 so that the distance from the cutting blade is the same. In other words, when the phototube 5 approaches the cutting blade, the phototube 9 also approaches the cutting blade by the same distance. When the roll sheet wears out and finally the specified length cannot be obtained,
The rear end of the roll sheet is between the phototube 9 and the cutting blade. At this time, the phototube 9 reacts because the optical axis 8 is no longer blocked by the roll sheet, and the alarm 10 issues an alarm to the molder.

When the length of the cut sea 1 is changed, the position of the phototube 5 is changed, but since the same spectrophotometer W9 also moves, it is always possible to detect when the length is short of a predetermined length. The offender who has learned from the warning that the roll sheet has been consumed can change the roll sheet using a separately provided change device 11.

(Effects of the Invention) According to the present invention, when supplying sheets using a continuous vacuum cutting machine, the remaining amount of roll sheets can be automatically known during production, and the roll sheets can be changed without stopping production. It is possible to provide an automatic sheet feeding device for the machine.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a continuous feed type device equipped with a sheet feeding device of the present invention. 1 is a roll sheet, 3 is a feed roll, 4 is a cutting blade, 5 and 9 are phototubes, 10 is an alarm, and 11 is a stage changing device. (Above) Applicant Toyo Rubber Industries Co., Ltd. Agent Patent Attorney Iwao Tamura 71 Procedures Amendment (formality) 1. Indication of the incident Patent Application No. 16833 2. Name of the invention Automatic sheet feeding device for vacuum forming machine 3. Relationship with the case of the person making the amendment Patent applicant (314) Toyo Tire & Rubber Industries, Ltd. 4. Agent Address: 1-2-8 Hira-2 Sonezaki, Kita-ku, Osaka-shi, Osaka 530
June 11, 2016 (Shipping date: June 26, 2017) 6. The subject of the amendment, ``Claims,'' will be corrected to ``Detailed Description of the Invention.''(that's all)

Claims (1)

[Claims] (1) In the sheet feeding device of a continuous vacuum forming machine, which consists of a sheet feeding device, a heating device, and a forming device, the sheet feeding device cuts the rolled sheet into a predetermined length to obtain cut sheets, and then supplies the cut sheets to the heating device. 1. An automatic sheet feeding device which notifies a molder as an alarm when the roll sheet is consumed and cut sheets of a predetermined length cannot be obtained.