JPH0257327A - Manufacture of plastic draining bag - Google Patents

Abstract

PURPOSE:To increase durability of an opening cutter, and to omit a labor and a cost required when bags are peeled one by one after pore groups are opened by holding a film heated small protrusion group and a bearer, opening the pore groups, peeling the both faces of superposed films by a peeling plate, and then forming bags. CONSTITUTION:An opening roll 2 which integrally has many protrusion groups 4 on the outer surface of a metal roll 3 and an electric heater 5 inserted into a bore opened in the axial central direction of the roll 3 is employed. A supporting roll 6 made of a flexible material such as rubber is so installed as to rotate synchronously with the roll 2 while holding a film 1 to the end of the groups 4. A peeling plate is interposed between the films 1 immediately after the rolls 2, 6. The films are sequentially brought into contact with the peeling plate interposed between the films in a state that the melted parts are softened immediately thereafter to peel both the faces of the films, and the films are then applied to a bag forming machine to form bags.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a plastic drainage bag used for storing household raw rubber and the like.

[Conventional technology]

Conventional plastic drainage bags are made using a machine that stacks up a large number of made plastic bags and presses a drill or other perforating cutting blade against them using a press machine to punch groups of small holes in six bags. Manufactured by processing.

[The problem that the idea attempts to solve]

With the above conventional manufacturing method, there is a problem with the durability of the awl or drilling cutting blade, and a hole is created in the holder that holds the tip of the awl or drilling cutting blade, so the holder must be replaced frequently. Also, when drilling the above groups of small holes, the six bags stick together strongly at the edge of each small hole due to the pressure of the aperture or drilling cutting blade, so after drilling the small holes, it is necessary to stack the six bags. The large number of bags that are placed in the bag must be peeled off one by one by hand, which poses problems such as extra effort and cost. The object of the present invention is to provide a method for manufacturing a plastic drainage bag that can solve the above-mentioned conventional problems.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has an object in which, in the process of overlapping long plastic films and continuously or intermittent transport, the film is held between a group of small protrusions being heated and a holder that receives them. Immediately after this step, a peeling plate is interposed between the overlapping surfaces of the film to form a group of small holes penetrating between both surfaces of the film, and the edges of each hole of the group of small holes are formed. This process consists of a step of peeling off the welded portion, and a step of hooking the plastic film, in which the small hole groups have been thermally processed in the above steps, to a bag-making machine to form a bag.

[Effect]

In the process of transferring the stacked long plastic films between the heated small protrusions and the pedestal that receives them, the small protrusions come into pressure contact with the film,
At the same time as a group of small holes penetrating both sides of the film are formed, the edge portions of each of the small holes in the film are fused into an annular shape.

After this CC, each of the fused parts in a softened state hits the peeling plate interposed between the films one after another, and is peeled off on both sides of the film. The plastic film whose small hole groups have been thermally processed through the above steps is directly transferred to a bag making machine, or the film is wound up by a winding machine and then passed through a bag making machine to make bags.

〔Example〕

The present invention will be described in detail below based on the drawings. 1 is a long plastic film, which is formed on a tube and stacked on top of each other as shown in the first figure;
Films are folded along their center lines as shown in the second diagram, or two films are simply overlapped as shown in the third diagram, which is used for ordinary bags. 2 is a perforation roll, for example, a metal roll 3 with a large number of small protrusion groups 4 integrally protruded on its outer peripheral surface. An electric heater 6 is inserted into a shaft hole drilled in the direction of the central axis of the roll 3. This perforation roll 2 controls its rotation so as to perforate a group of small holes in each part of the film 1 that corresponds to a part of the entire surface or to a part of the film 1 that corresponds to a part of the film 1 such as near the bottom. 6 adjusts the protruding position of the small protrusion group. 6 is a receiving roll penetrated with a flexible material such as rubber, and rotates in synchronization with the perforation roll 2 while holding the film 1 between it and the tip of the small protrusion group 4. erect. Note that the perforation roll 2 may be replaced with a press plate that operates in the vertical direction and has a group of small protrusions on the plate surface, and the receiving roll 6 may be replaced with a plywood board that receives the group of small protrusions on the press plate. be. 7 is the perforation roll 2
A peeling plate interposed between the film 1 immediately after the receiving roll 6 and having a blade 8 at its tip may be used, or a peeling plate without a blade may be used.

If the film 1 is in the form of a tube, the side edge of the film 1 is cut open at the beginning of the transfer of the film 1, and the peeling plate 7 is introduced between the films 1 from there. 9 and 10 are peeling plates 7
Transfer rolls 11 and 12, which sandwich and transfer the film 1 at a position close to the rear end, are bearings attached to the rear end of the peeling plate 7, and contact the transfer rolls 9 and 10 via the film 1, and rotates synchronously with the transfer roll 910,
The peeling plate 7 is supported so that it always remains in a position close to the transfer rolls 9,10.

[Effect of idea]

The present invention heat-processes the small holes in the process of transferring the plastic film as described above. is not a problem, there is no need to frequently replace the cradle, and the small hole J! After perforating the T, make each bag one by one! till
The effort and cost required for separating the bags can be saved, and the manufacturing efficiency of plastic drainage bags can be further increased.

[Brief explanation of the drawing]

The drawings are: Figures 1 to 4 are views showing modified examples of overlapping plastic films used in the practice of the present invention, and Figure 5 is a side view schematically showing an example of the apparatus used in the practice of the present invention. , FIG. 6 is a plan view schematically showing the same device, and FIG.
The figure shows a plastic drainage bag manufactured by the method of the present invention. DESCRIPTION OF SYMBOLS 1... Plastic film, 2... Roll for perforation, 4... Small protrusion group, 8... Receiving roll, 7... Peeling plate, 0... Transfer roll. Patent applicant Seishi Takasaki 44＼ Male 5no 2? Call receiver for the hole (in Searle B [Konoras 1 Knornome;, Fig. 2 ＼ No. 32 ] ＼ No. 6?

Claims (1)

[Claims] In the process of overlapping and transporting long plastic films, the film is held between a group of heated small protrusions and a pedestal that receives them, and a group of small holes passing through both sides of the film are bored. step, and immediately after this step, interposing a release plate between the polymerized surfaces of the film,
The process of peeling off the welded part of each hole edge of the above-mentioned small hole group, and the process of hanging the plastic film with the small hole group thermally processed in the above process on a bag making machine to make a bag. Manufacturing method.