JP3011218U - Inflation film guide device - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable swift cleaning of the guide surface of a belt member in an inflation film guide device. [Structure] An endless belt member 15, holding means 12 and 13 for holding the belt member so that a part of the belt member in the circumferential direction serves as a guide surface, and the belt member with respect to the holding means. A belt driving means 16 that rotates in the circumferential direction and a removing means that is disposed at a position facing a predetermined portion other than the guide surface of the belt member and removes adhered substances from the surface of the belt member that is rotationally driven by the belt driving means. A guide device is composed of 17 and. As the removing means 17, a roller with a brush for brushing off adhered substances from the belt member is used, and guide rollers 14a and 14b for winding the belt member are provided so that the predetermined portion of the belt member protrudes in the horizontal direction. It is desirable to provide a receiving means 19 for receiving the adhered matter that has been wiped off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inflation film guide device used for folding a tubular film continuously manufactured by an inflation molding method into a sheet shape and taking it up.

[0002]

[Prior art]

 In the inflation molding method, molten resin is extruded through a die to form a tube-shaped resin bubble, and air is blown into the resin bubble to expand and cool the resin bubble, and to form a tubular shape with the required inner and outer diameters. It is formed into a film. The tubular film thus continuously extruded is folded into a sheet so as to be sandwiched from both sides when passing through the guide device, and then wound into a roll.

In order to fold a tubular film into a sheet shape, a pair of guide surfaces that face each other with the tubular film sandwiched therebetween and the facing distance becomes narrower in the film take-up direction is provided in the guide device as described above. Is provided. The tubular film is introduced into the space between the inner surfaces of these cases, and is drawn from the side having a wide facing distance toward the narrow side. At this time, the outer surface of the tubular film slides against the guide surface, and the tubular film is smoothly folded into a sheet.

However, when the tubular film slides on the guide surface, deterioration products of additives contained in the raw material resin of the film adhere to the guide surface. And, if a large amount of this is deposited, it may damage the surface of the subsequent tubular film. Therefore, for example, as proposed in Japanese Utility Model Laid-Open No. 63-824, a band member formed in an endless band shape is held so that a part of its circumferential direction serves as a guide surface. When deteriorated substances are accumulated on the surface, the belt member can be rotated so that this guide surface is on the side opposite to the side facing the tubular film (hereinafter referred to as the back side), and this surface can be cleaned. I have to.

[0005]

[Problems to be solved by the device]

 However, if the belt member is rotated and cleaned by hand every time, there is a problem that the time for which the production of the tubular film is interrupted for cleaning becomes long. In addition, in order to perform cleaning by hand, a worker must go inside the guide device (that is, the inflation molding device), so measures must be taken to ensure the safety of this worker. I won't.

The present invention has been made in view of such a problem, and an object thereof is to provide an inflation film guide device capable of automatically and quickly cleaning the guide surface of the band member. .

[0007]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, in the present invention, an endless band member, a holding means for holding the band member such that a part of the band member in the circumferential direction serves as a guide surface, From the surface of the belt member, which is disposed at a position facing a predetermined portion other than the inner surface of the belt member, which rotates the member in the circumferential direction with respect to the holding means, and which is rotationally driven by the belt driving device. The inflation film guide device is composed of the removing means for removing the deposits. According to such an inflation film guide device, while the portion of the strip member that has been the guide surface until then is automatically rotated to a position (for example, the back side) out of the guide surface, it is automatically removed by the removing means. Can be cleaned. Therefore, it is not necessary for an operator to approach the device.

Here, the removing means is composed of a roller with a brush for brushing off the adhered matter from the belt member, and a brush driving means which works together with the belt driving means to rotationally drive the roller with the brush. Is desirable.

Further, in this case, the band member is wound so that the predetermined portion in the circumferential direction of the band member protrudes outward in the horizontal direction from the lower portion of the predetermined portion in the circumferential direction in the horizontal direction. It is desirable to provide a guide member for this purpose and a receiving means that is arranged below the predetermined portion in the circumferential direction and that receives the adhering material that has been brushed off by the brush roller. According to this, the adhering matter once wiped off by the brush roller is received by the receiving means and collected, and does not adhere to the belt member again.

As the removing means, a sticking roller that comes into contact with the belt member and sucks adhering substances while rotating may be used. According to this, since the adhesive roller is rotationally driven by contact with the rotating belt member, it is not necessary to provide any means for driving the adhesive roller. Moreover, since the adhesive roller adsorbs the adhering material by its adhesive force, there is little fear that the adhering material will fall and adhere to the belt member again like a roller with a brush.

[0011]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an inflation molding device equipped with an inflation film guide device according to the present invention. This apparatus is equipped with a hopper 1 into which a resin material (for example, a polyolefin resin) to be inflation-molded is charged, and an extruder 2a which is connected to the hopper 1 and melts and kneads the resin material to push it out to a die 3. And machine 2. An extrusion hole (not shown) is formed in a ring shape in the die 3, and a tubular resin bubble 50 is continuously discharged upward from the extrusion hole. Air is blown into the discharged resin bubble 50, and the resin bubble 50 expands to have a desired inner and outer diameter. Then, the expanded bubble 50 is cooled as it goes upward, and becomes a tubular film 50 '.

The thus completed tubular film 50 ′ is pulled up by the take-up pinch roll 5 while being folded into a sheet shape while passing through the inside of the inflation film guide device 10. The tubular film 50 'pulled up by the pinch roll 5 is wound on the winding shaft 7a of the winding device 7 while being guided by the plurality of guide rolls 6a to 6d.

Here, the guide device 10 will be described in detail with reference to FIG. The guide device 10 includes a pair of flat plates 11 and 11 arranged in a V shape so that the surfaces thereof face each other and the interval becomes narrower toward the upper part (that is, the facing interval becomes narrower in the take-up direction). A driving roller 12 arranged near the lower end of each flat plate 11, a driven roller 13 arranged near the upper end of each flat plate 11, and a vertically arranged intermediate position near the back surface (back surface) of each flat plate 2 It comprises one guide roller 14a, 14b and a belt member 15 wound around each roller 12, 13, 14a, 14b so as to surround each flat plate 11.

The drive roller 12 is rotationally driven by a belt drive motor 16 arranged adjacent to the drive roller 12. Further, the two guide rollers 14a and 14b are arranged slightly apart from each other in the vertical direction, and the upper guide roller 14a is horizontally separated from the back surface of the flat plate 11 than the lower guide roller 14b. It is arranged.

The belt member 15 is made of felt, flannel cloth, denim cloth, or the like in an endless belt shape. Then, a part of the belt member 15 wound around the rollers 12, 13, 14a, 14b in the circumferential direction extends in the vertical direction in contact with the surface of the flat plate 11. A part of the other circumferential direction is wound around the driven roller 13 and extends to the back surface side of the flat plate 11, and is wound around the two guide rollers 14a and 15b in an S shape, and then along the back surface of the flat plate 11. And extends downward, and is further wound around the drive roller 13 and connected to the surface side of the flat plate 11. The portion extending in contact with the surface of the flat plate 11 is hereinafter referred to as a guide portion (the surface of this portion serves as the “guide surface” in the claims) 15a, and of the above S-shaped portion, the upper guide roller. The portion wound around 14a is referred to as a cleaning portion (corresponding to the "predetermined portion in the circumferential direction" in the claims) 15b. Further, the portion from the portion wound around the lower guide roller 14b to the portion extending along the back surface of the flat plate 11 is referred to as a cleaning portion 15c.

Further, the guide device 10 is arranged in the vicinity of the brush roller 17 and the brush roller 17 arranged at a position facing the cleaning section 15b, and rotates the brush roller 17. And a brush drive motor 18 for driving. The brush roller 17 is made by implanting a large number of bristles on the outer periphery of the cylindrical core portion 17a. However, it is desirable that the bristles be made of a material that is less susceptible to deterioration as described below. Further, a tray 19 is arranged below the cleaning unit 15b.

The tubular film 50 ′ introduced into the inside of the guide device 10 thus configured, that is, in the space sandwiched by the guide portions 15 a of each strip member 15, as shown in FIG. The left and right outer surfaces are guided upward while sliding with respect to the guide portion 15a, the left and right spaces are gradually narrowed, and finally folded into a sheet. In this way, the tubular film 50 'passing through the guide device 10 is continuously folded into a sheet shape. However, the deteriorated product P such as an additive contained in the resin adheres to the guide portion 15a, and the tubular film 50' is formed. If the manufacturing process is continued for a long time, the deteriorated product P will be deposited on the guide portion 15a.

In such a case, the belt drive motor 16 is actuated to slowly rotate the belt member 15 in the circumferential direction (the direction of arrow A in the figure), and the portions previously located in the guide portion 15a are sequentially cleaned. It is sent so that it is located in the portion 15b. At the same time, the brush drive motor 18 is operated to rotate the brush roller 17 in the direction of the arrow B in the figure at a somewhat high speed, and from the surface of the belt member 15 in the order sent to the position of the cleaning portion 15b. The deteriorated substances attached here are removed. The removed deteriorated product P is received by the receiving tray 19 and collected, so that the removed deteriorated product P is prevented from adhering to the newly cleaned portion 15c after cleaning. . The operation control of the belt drive motor 16 and the brush drive motor 18 is remotely operated at a place distant from the inflation molding device. Thus, the cleaning of the original guide portion is completed in a short time, the original cleaning portion becomes a new guide portion 15a, and the production of the tubular film is restarted.

In the above embodiment, the roller with a brush 17 is used to brush off the deteriorated material. However, the guide device of the present invention is not limited to this. For example, as shown in FIG. You may use the adhesive roller 37 which formed the adhesive surface 37b on the outer periphery of the member 37a. In this case, if the adhesive surface 37b of the adhesive roller 37 is brought into contact with the belt member 15 ', the belt drive motor 16' is actuated and the belt member wound around the drive roller 12 'and the driven roller 13'. If 15 'is rotated, the adhesive roller 37 also rotates together. Therefore, a motor or the like for driving the adhesive roller 37 to rotate is unnecessary. Then, the deteriorated product P attached to the belt member 15 ′ is almost adsorbed on the adhesive surface 37 b of the adhesive roller 37. Therefore, the tray 19 used in the above embodiment may be omitted.

[0020]

[Effect of device]

 As described above, in the blown film guide device of the present invention, the belt member is rotated in the circumferential direction using a motor or the like, and the guide surface that has been formed up to that point is the position where it is removed from the guide surface. It is designed to remove adhering substances while moving to. Moreover, this removal work is automatically performed by, for example, a roller with a brush driven by a motor or the like, or an adhesive roller that rotates together with the belt member. Therefore, by using the blown film guiding apparatus of the present invention, it is possible to rotate the belt member and clean the adhering material in a short time without requiring an operator to approach the guiding apparatus.

When the brush roller is used to brush off the adhered matter from the belt member, the portion of the belt member on which the brush contacts (predetermined portion in the circumferential direction) protrudes more horizontally than the portion below it. If the tray and the like are provided below this portion, it is possible to prevent the scraped off adherents from adhering again to the belt member.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an inflation molding apparatus including an inflation film guide device according to the present invention.

FIG. 2 is a configuration diagram of the guide device.

FIG. 3 is a configuration diagram showing a second embodiment of the guide device.

[Explanation of symbols]

 3 Die 5 Pinch roller 10 Inflation film guide device 11 Flat plate 15 Belt member 17 Brush roller 37 Adhesive roller 50 'Tubular film P Degraded matter (adhered matter)

Claims (4)

[Scope of utility model registration request] 1. A tube-shaped film formed by inflation molding, which is used to take it out as a sheet, and is opposed to each other with the tube-shaped film sandwiched therebetween, and the distance between the two is narrowed in the take-up direction of the tube-shaped film. In an inflation film guiding device having a pair of guide surfaces, an endless band member, and a holding unit that holds the band member such that a part of the band member in the circumferential direction serves as the guide surface, The belt driving means for rotating the belt member in the circumferential direction with respect to the holding means, and the belt driving means are arranged at a position facing a predetermined circumferential direction portion other than the portion serving as the guide surface of the belt member. An inflation flap having a removing means for removing deposits from the surface of the belt member that is rotationally driven. Lum guide device. 2. The removing means is composed of a roller with a brush for brushing off the adhered matter from the belt member, and a brush driving means which operates together with the belt driving means to rotationally drive the roller with the brush. The blown film guide device according to claim 1, wherein the blown film guide device is provided. 3. A guide member around which the belt member is wound so that the predetermined portion in the circumferential direction of the belt member projects in the horizontal direction toward the outside of the circumference more than the portion below the predetermined portion in the circumferential direction. 3. The inflation film guide device according to claim 2, further comprising: a receiving unit that is disposed below the predetermined portion in the circumferential direction and that receives the adhering material that has been brushed off by the roller with a brush. 4. The removing roller is an adhesive roller that comes into contact with the belt member that is rotationally driven by the belt driving unit and that attracts the adhering matter while rotating. Inflation film guide device.