JP6438621B1 - Rubber material supply device and rubber extrusion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly supply a rubber material to a rubber inlet even when the width of the rubber material is larger than the width of a rubber inlet. A rubber material supply apparatus includes a conveying tool, a cutting tool, and a folding tool. The transport tool 4 transports the rubber material G from the front end GF to the downstream side. The cutting tool 5 cuts the front end portion GF of the rubber material G to be conveyed into a front end main portion F1 on one side in the width direction Y and a front end sub portion F2 on the other side in the width direction Y. The folding tool 6 folds the front end sub-part F2 so as to overlap the rear part GR. [Selection] Figure 1

Description

  The present invention relates to a rubber material supply device and a rubber extrusion device for supplying a strip-shaped and unvulcanized rubber material to a downstream side from a front end portion in a length direction.

  Conventionally, a rubber extruder that continuously extrudes rubber with a predetermined cross-sectional shape is known. A belt-like unvulcanized rubber material is supplied from a rubber material supply device to a rubber inlet of this type of rubber extruder. The band-shaped rubber material has a predetermined width. However, depending on the rubber extruder, the width of the rubber inlet may be smaller than the width of the rubber material, and there is a problem that the rubber material cannot be supplied into the rubber extruder.

  Therefore, Patent Document 1 below proposes a rubber material folding device for reducing the maximum width of the cross section of a belt-shaped rubber material. The device includes a first rotary blade, a second rotary blade, and a shooter. The first rotary blade divides the rubber material into three equal parts in the width direction. A 2nd rotary blade puts a streak in the rubber material divided into 3 parts along the longitudinal direction. The shooter guides the rubber material that has been divided into three equal parts to the rubber insertion port while being bent into a box shape along the streaks.

JP 48-037882 A

  However, in the proposed rubber material folding apparatus, the wall surface of the shooter interferes with the edge of the rubber material on the front end side. For this reason, there has been a problem that the rubber material is lifted and the rubber material cannot be smoothly supplied to the rubber inlet.

  The main object of the present invention is to provide a rubber material supply device and a rubber extrusion device that can smoothly supply a rubber material to a rubber input port even when the width of the rubber material is larger than the width of the rubber input port. Yes.

A first invention is a rubber material supply device that supplies a strip-shaped and unvulcanized rubber material from the front end portion in the length direction to the downstream side,
A conveying tool for conveying the rubber material from the front end portion to the downstream side;
A cutting tool for cutting the front end portion of the rubber material transported from the transport tool into a front end main portion on one side in the width direction and a front end sub-portion on the other side in the width direction;
A folding tool that folds the front end sub-portion so as to overlap a rear portion of the rubber material that follows the front end portion.

  In the rubber material supply device according to the present invention, it is preferable that the folding tool pressure-bonds the folded front end sub-portion to the subsequent portion.

  It is preferable that the rubber material supply device according to the present invention further includes a guide for guiding the front end sub-part toward the rear part.

  In the rubber material supply device according to the present invention, it is preferable that the guide includes a roller.

  In the rubber material supply device according to the present invention, it is preferable that the folding tool folds the front end sub-portion around an axis along the width direction.

  In the rubber material supply device according to the present invention, the folding tool is arranged on the downstream side of the transporting tool and above the conveyor part, and between the conveyor part and the front end sub-unit. It is preferable to include a pressure roller that folds the portion and presses the portion to the subsequent portion.

  In the rubber material supply device according to the present invention, it is preferable that the cutting tool cuts the width of the front end sub-part smaller than the width of the front end main part.

  2nd invention is a rubber extrusion apparatus, Comprising: The rubber extruder which has a rubber insertion port to which material rubber is supplied, The rubber material supply apparatus of 1st invention, The said rubber material supply apparatus is the said It arrange | positions so that the said front-end part of a rubber material may be supplied to the said rubber insertion port.

  The rubber material supply device of the first invention includes a cutting tool and a folding tool. The cutting tool separates the front end portion of the rubber material into a front end main portion on one side in the width direction and a front end sub-portion on the other side in the width direction. Further, the folding device is folded so that the separated front end sub-portion overlaps the subsequent portion.

  Accordingly, the rubber material is sent to the downstream side in order from the front end main portion. At this time, since the width of the front end main portion is smaller than the width of the rubber material, it is possible to smoothly input the front end main portion even to a rubber insertion port having a narrow opening width.

  Further, in the rubber material, following the front end main portion, the subsequent portion is fed including a portion overlapping the front end sub-portion. This subsequent portion has the same width as the rubber material. However, the succeeding portion can be easily drawn into the rubber insertion port by being dragged by the front end main portion previously input into the rubber insertion port.

  The rubber extrusion device of the second invention includes the rubber material supply device of the first invention. Therefore, the rubber material can be smoothly fed into the rubber inlet having a narrow opening width, and the extrusion molding by the rubber extruder can be performed efficiently and continuously.

It is a side view of the rubber extrusion apparatus in which the rubber material supply apparatus of one Embodiment of this invention was used. It is a top view of a rubber extrusion device. It is a side view which shows a cutting tool and a guide tool. (A)-(c) is a side view which shows the effect | action of a folding tool. (A)-(c) is a perspective view which shows the effect | action of a folding tool from the rubber material side.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a rubber extrusion device 2 in which the rubber material supply device 1 of the present embodiment is used, and FIG. 2 is a plan view thereof. FIG. 3 is a side view showing the cutting tool 5 and the guiding tool 16 of the rubber material supply apparatus 1.

  As shown in FIGS. 1 and 2, the rubber extrusion device 2 of the present embodiment includes a rubber extruder 3 and a rubber material supply device 1. The rubber material supply device 1 is arranged so as to supply the belt-shaped and unvulcanized rubber material G from the front end GF in the length direction X to the rubber inlet 3A of the rubber extruder 3.

  The rubber extruder 3 includes a rubber insertion port 3A, a substantially cylindrical barrel 3B, and a rotatable screw 3C disposed in the barrel 3B. The rubber inlet 3A is provided at the rear end side of the barrel 3B in the rubber extrusion direction, for example, with an upper opening. Such a rubber extruder 3 can continuously extrude with a predetermined cross-sectional shape while kneading the rubber material G fed from the rubber inlet 3A. As the rubber extruder 3, those having various conventional structures can be adopted.

  Next, the rubber material supply apparatus 1 supplies the rubber material G to the rubber inlet 3A of the rubber extruder 3 arranged on the downstream side. The rubber material supply device 1 according to the present embodiment includes a conveying tool 4, a cutting tool 5, and a folding tool 6.

  The conveying tool 4 includes a conveyor unit 4A such as a belt conveyor, and conveys the rubber material G from the front end GF to the downstream side on the conveying surface 4S. The transport surface 4S is driven by the motor M1. A motor-driven roller conveyor can also be adopted as the conveyor unit 4A.

  The cutting tool 5 separates the front end GF of the rubber material G conveyed from the conveying tool 4 into a front end main part F1 on one side in the width direction Y and a front end sub-part F2 on the other side in the width direction Y. Disconnect.

  The cutting tool 5 includes, for example, a knife-like cutter 8 that cuts the front end GF in the length direction X. Thereby, the front end part GF is separated into the front end main part F1 and the front end main part F1. In this example, the cutter 8 is provided in the vicinity of the front end of the transport tool 4, and the rubber material G moves forward relative to the cutter 8, so that the front end GF is cut in the length direction X from the front edge Fe. The

  The cutter 8 is supported so that the position can be changed in the width direction Y. Thereby, the width W1 of the front end main portion F1 can be freely set. In this example, the cutting tool 5 cuts the width W2 of the front end sub-part F2 smaller than the width W1 of the front end main part F1. The width W2 is set smaller than the width W3 of the rubber insertion port 3A.

  The cutter 8 moves up and down between a lowered position 9L (shown in FIG. 1) for cutting the front end GF and a raised position 9U (shown in FIG. 3) for waiting upward without being cut at the subsequent part GR. Supported as possible. The succeeding portion GR means a portion following the front end portion GF in the rubber material G.

  As shown in FIG. 3, the cutting tool 5 of this example includes a laterally movable body 10 supported by the transporting tool 4 and an elevating body 11 supported by the laterally movable body 10 so as to be vertically movable. Then, the cutter 8 is held by the lifting body 11 via the cutter holder 12.

  In this example, the transport tool 4 is provided with, for example, a pair of support columns 14 that rise from the frame 13 of the transport tool 4 and a guide rail 15 that spans between the support columns 14 and extends in the width direction Y. The laterally movable body 10 can be guided in the guide rail 15 and move in the width direction Y. The width direction Y is driven by a driving device (not shown) having a ball screw mechanism, for example. Further, for example, a cylinder 26 is attached to the lateral moving body 10, and the elevating body 11 is supported on the lower end of the rod of the cylinder 26.

  The rubber material supply device 1 further includes a guide 16 for guiding the front end sub-portion F2 to the rear portion GR side. The guide 16 includes a roller 17. The guide 16 of this example includes a cylinder 18 that is attached to the elevating body 11 and a roller 17 that is supported on a lower end of the rod of the cylinder 18 via a roller holder 19. The roller 17 is held rotatably around an axis parallel to the width direction Y.

  As shown in FIG. 1, the guide 16 presses the front end sub-part F <b> 2 being cut downwards when the roller 17 is lowered. This prevents the front end sub-part F2 being cut from being caught in the folding tool 6 arranged on the downstream side. In this example, the roller 17 can move up and down separately from the up and down movement of the cutter 8 by the cylinder 18. However, the roller 17 may be moved up and down separately from the up and down movement of the cutter 8 by directly supporting the cylinder 18 on the lateral moving body 10 instead of the lifting body 11. Further, the roller 17 may be moved up and down integrally with the cutter 8 by directly supporting the roller holder 19 on the elevating body 11 without providing the cylinder 18.

  As shown in FIGS. 5B and 5C, the folding tool 6 folds the front end sub-part F2 so as to overlap the rear part GR. In particular, it is preferable that the folding tool 6 bends the front end sub-part F2 to the rear side around the axis line k along the width direction Y and crimps it to the rear part GR.

  As shown in FIGS. 1 and 2, the folding device 6 includes a conveyor unit 20 disposed on the downstream side of the transport device 4 and a pressure roller 21 disposed above the conveyor unit 20 in this example. . And between the conveyor part 20 and the pressurization roller 21, the front-end subpart F2 is folded and crimped | bonded to the subsequent part GR.

  As the conveyor unit 20, a belt conveyor in which a conveyor belt 23 is wound between the front and rear rollers 22F and 22R is preferably used. The conveyor surface 20S of the conveyor unit 20 is driven at substantially the same speed as the conveyor 4 by, for example, a motor M2. The pressure roller 21 is disposed at an upper position facing the rear roller 22R. In this example, the pressure roller 21 is a weight roller, and is pressed against the conveying surface 20S using its own weight or a biasing means such as a spring.

  FIG. 4A and FIG. 5A show the state at the start of cutting by the cutting tool 5. At the start of cutting, the folding tool 6 bites the front end main part F <b> 1 sent from the transport tool 4 side between the conveyor unit 20 and the pressure roller 21. At this time, the front end sub-portion F2 is guided downward by the roller 17 of the guide 16. Therefore, the front end sub-part F <b> 2 is not bitten by the folding tool 6.

  FIGS. 4B and 5B show a state at the end of cutting. When the cutter 8 and the roller 17 are lifted and separated from the rubber material G, the cutting is completed. As the cutting end P approaches the folding tool 6, the vicinity of the cutting end P of the front end sub-portion F <b> 2 comes into contact with the conveyor unit 20 and begins to bend in a U shape.

  FIG. 4C and FIG. 5C show the crimped state. A U-shaped bent portion F <b> 2 r of the front end sub-portion F <b> 2 is caught between the conveyor unit 20 and the pressure roller 21. As a result, the front end sub-part F2 is bent around the axis k, and the front end sub-part F2 is sequentially crimped to the rear part GR.

  Therefore, in this example, the conveyor part 20 of the folding tool 6 also constitutes a part of the guide tool 16 for guiding the front end sub-part F2 to the rear part GR side.

  In this example, a knife-like one is employed as the cutter 8 of the cutting tool 5. However, the present invention is not limited to this, and a round blade, a guillotine blade, or the like may be employed. In the case of a round blade or a guillotine blade, it is preferable to use a contact plate that receives the lower surface of the rubber material G. Further, in the case of a guillotine blade, it is preferable to cut the rubber material G after it has been stopped.

  Further, as a part of the guide 16, a guide roller 25 (shown by a one-dot chain line in FIG. 1) for bending the hanging front end sub-part F <b> 2 into a U shape can be separately provided. The guide roller 25 is disposed below the conveyor unit 20. Further, it is more preferable that the guide roller 25 is disposed so as to freely advance and retract on the rear side in the transport direction.

  Alternatively, two pressing rollers may be used as the folding tool 6, and the front end sub-portion F2 may be folded back and crimped to the rear portion GR between the two pressing rollers. At this time, it is preferable to provide one or more rib-like protrusions extending continuously in the circumferential direction on the outer periphery of at least one pressure roller. Thereby, connection strength can be raised.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 1 Rubber material supply apparatus 2 Rubber extrusion apparatus 3 Rubber extruder 3A Rubber insertion port 4 Conveying tool 5 Cutting tool 6 Folding tool 16 Guide tool 17 Roller 20 Conveyor part 21 Pressure roller F1 Front end main part F2 Front end sub part G Rubber material GF Front end Part GR Subsequent part W1, W2 Width X Length direction Y Width direction

Claims (8)

A rubber material supply device that supplies a strip-shaped and unvulcanized rubber material from the front end in the length direction to the downstream side,
A conveying tool for conveying the rubber material from the front end portion to the downstream side;
A cutting tool for cutting the front end portion of the rubber material transported from the transport tool into a front end main portion on one side in the width direction and a front end sub-portion on the other side in the width direction;
A rubber material supply device comprising: a folding tool that folds the front end sub-portion so as to overlap a rear portion of the rubber material that follows the front end portion.   The rubber material supply device according to claim 1, wherein the folding tool crimps the folded front end sub-portion to the rear portion.   The rubber material supply apparatus according to claim 1, further comprising a guide for guiding the front end sub-part toward the rear part.   The rubber material supply device according to claim 3, wherein the guide includes a roller.   The rubber material supply device according to any one of claims 1 to 4, wherein the folding tool folds the front-end sub-portion around an axis along the width direction.   The folding tool is arranged above the conveyor unit on the downstream side of the transporting tool, and folds the front end sub-part between the conveyor unit and press-fits to the subsequent part. The rubber material supply device according to any one of claims 2 to 5, comprising a pressure roller.   The said cutting tool is a rubber material supply apparatus in any one of Claims 1-6 which cut | disconnects the width | variety of the said front end subpart smaller than the width | variety of the said front end main part.   A rubber extruder having a rubber inlet to which material rubber is supplied, and the rubber material supply device according to any one of claims 1 to 7, wherein the rubber material supply device is configured to connect the front end portion of the rubber material. A rubber extruding device arranged to be supplied to the rubber inlet.

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