JP2006231872A - Rubber sheeting apparatus and rubber sheet forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber sheeting apparatus capable of easily forming a rubber sheet with a predetermined width not causing edge cutting or the like, and a rubber sheet forming method. <P>SOLUTION: When rubber R of high viscosity and high rigidity mixed by a Banbury mixer is pushed in the nip between a pair of rotating rolls 2 by a pusher 4 to be passed through the nip, the movement in the width direction of the rolls 2 of the rubber R mixed by the Banbury mixer is regulated by a pair of the side guides 3a and 3b provided above the rolls 2 and the side guides 3a and 3b are shaken in the width direction of the rolls 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rubber sheeting device and a method for forming a rubber sheet, and more particularly to a rubber sheeting device and a method for forming a rubber sheet that can easily form a rubber sheet having a predetermined width without edge breakage.

  Conventionally, rubber materials used as materials for rubber products such as tires are made by putting a predetermined amount of raw rubber such as natural rubber, carbon and compounding chemicals other than vulcanizing compound into a closed mixer called Banbury mixer. A method is known in which a kneaded rubber (hereinafter referred to as a Banbury kneaded rubber) is kneaded with an open structure roll kneader to obtain a predetermined viscosity.

  This Banbury kneaded rubber may not be sufficiently kneaded when the amount of carbon blended is large. In this case, the released rubber has high viscosity and high rigidity. Therefore, when kneading with a roll kneader, a phenomenon occurs in which it is difficult to bite into the roll and dances on the roll. When such a phenomenon occurs, the amount of rubber that bites into the roll is uneven, and even if it passes through the roll, the rubber becomes a small piece and does not become a sheet, or even if it becomes a sheet, the edge part is cut, There was a problem that a width defect occurred. Such a rubber sheet is difficult to handle in the next process, causing not only the quality but also the productivity reduction, and a solution is required.

As a means for preventing dance on the roll, there has been proposed a method in which rubber is forced between rolls with a pusher (see Patent Document 1). However, high viscosity and high rigidity Banbury kneaded rubber does not sufficiently push in the rubber at both ends that are free ends even if pushed in with a pusher, prevents the amount of bite into the roll, and has a predetermined width without edge breakage etc. It was difficult to obtain a rubber sheet
JP-A-11-216735

  An object of the present invention is to provide a rubber sheeting apparatus and a method for forming a rubber sheet, which can easily form a rubber sheet having a predetermined width without an edge break.

  In order to achieve the above object, a rubber sheeting apparatus according to the present invention is a rubber sheeting apparatus for forming a rubber sheet by pushing a kneaded rubber discharged from a hermetic mixer through a pair of opposed rotating rolls with a pusher. A pair of side guides spaced apart in the roll width direction and facing each other above the pair of rolls, wherein at least one of the pair of side guides is moved in the roll width direction and is introduced between the side guides. The pusher that moves forward and backward with respect to the pair of rolls can be advanced and inserted between the side guides that are disposed at the predetermined interval, and the pusher is inserted. Thus, at least one of the side guides can swing in the roll width direction.

  Further, the rubber sheet forming method of the present invention is the rubber sheet forming method in which the kneaded rubber discharged from the hermetic mixer is pushed by a pusher between a pair of oppositely rotating rolls and passed therethrough. The kneaded rubber is put between a pair of side guides provided facing each other upward in the roll width direction, and at least one of the pair of side guides is moved in the roll width direction while holding the kneaded rubber. The side guides are arranged to be narrowed at a predetermined interval, and the pusher that advances and retreats with respect to the pair of rolls is advanced and inserted between the side guides that are arranged at a predetermined interval so that the kneaded rubber is inserted between the rolls. While pushing in, at least one of both side guides is made to pass between the rolls while being swung in the roll width direction.

  According to the rubber sheeting device of the present invention, in the rubber sheeting device in which the kneaded rubber discharged from the hermetic mixer is pushed by a pusher between a pair of opposed rotating rolls to form a rubber sheet, A pair of side guides spaced apart in the roll width direction and facing each other is provided above the roll, and at least one of the pair of side guides is moved in the roll width direction while holding the kneaded rubber introduced between the side guides. By making it possible to dispose the kneaded rubber at a predetermined interval, it is possible to gather the kneaded rubber to be inserted between the side guides at a predetermined interval so as to have a sheet width to be formed after being securely held at a wide interval.

  Further, the pusher that advances and retreats with respect to a pair of rolls can be moved forward and inserted between both side guides arranged at a predetermined interval, and at least one of the side guides can be swung in the roll width direction with the pusher inserted. Because it is movable, both side guides and pushers prevent dancing on the roll even in high-viscosity and high-rigidity Banbury kneaded rubber, so that the roll can bite uniformly over the entire width of this predetermined interval. Thus, a rubber sheet having a predetermined width without any edge breakage can be easily formed.

  Further, the kneaded rubber can be prevented from being caught in the pusher, the side guide, and the roll by the swing of the side guide, and the rubber can be prevented from staying. Thereby, mixing into the kneaded rubber to be sheeted next can be prevented, and quality can be improved.

    According to the method for forming a rubber sheet of the present invention, in the method for forming a rubber sheet, the kneaded rubber discharged from the hermetic mixer is pushed between a pair of rotating rollers facing each other by a pusher, and the pair of rolls The kneaded rubber is put between a pair of side guides provided facing each other upward in the roll width direction, and at least one of the pair of side guides is moved in the roll width direction while holding the kneaded rubber. By arranging both side guides so as to be narrowed at a predetermined interval, the kneaded rubber to be charged can be held between the side guides at a predetermined interval so as to have a sheet width to be formed after being securely held at a wide interval. it can.

  Also, a pusher that advances and retreats with respect to a pair of rolls is advanced and inserted between both side guides arranged at predetermined intervals to push the kneaded rubber between the rolls, and at least one of the side guides is swung in the roll width direction. Even between high-viscosity and high-rigidity Banbury kneaded rubber, both side guides and pushers prevent dancing on the roll, and evenly rolls over the entire width of this predetermined interval. A rubber sheet having a predetermined width can be formed easily without cutting edges.

  Further, the kneaded rubber can be prevented from being caught in the pusher, the side guide, and the roll by the swing of the side guide, and the rubber can be prevented from staying. Thereby, mixing into the kneaded rubber to be sheeted next can be prevented, and quality can be improved.

  In the present invention, to swing the side guide in the roll width direction means to repeatedly reciprocate a short section in the roll width direction.

  Hereinafter, a rubber sheeting apparatus and a method for forming a rubber sheet of the present invention will be described based on the embodiments shown in the drawings. FIG. 1 illustrates an overall outline of the rubber sheeting apparatus.

  This rubber sheeting device 1 has a pair of opposed rolls 2a and 2b that are rotationally driven by electric motors in opposite directions, and has an open structure.

  A pair of side guides 3 that are spaced apart from each other in the roll width direction and are opposed to each other above the rolls 2a and 2b are provided. At least one of the side guides 3 is movable in the roll width direction along the surfaces of the rolls 2a and 2b.

  Further, a pusher 4 that can move forward and backward with respect to the rolls 2a and 2b is disposed above the rolls 2a and 2b. A protruding stopper 5 is provided on the side surface of the pusher 4.

  High-viscosity and high-rigidity Banbury kneaded rubber R discharged from a Banbury mixer (not shown) is transported and fed into the rubber sheeting device 1 by a supply conveyor 6 or the like. The introduced Banbury kneaded rubber R is pushed between the two rolls 2a and 2b by the pusher 4, passes between the rolls 2a and 2b, is formed into a rubber sheet, and is conveyed to the next process by the delivery conveyor 7.

  Hereinafter, the process of forming the rubber sheet will be described in detail based on FIGS. As shown in FIG. 2, the Banbury kneading rubber R thrown on the roll 2 is received in a state where the distance between the side guides 3a and 3b is widened. By widening the gap to about the width of the roll 2, the Banbury kneaded rubber R can be reliably held without spilling. At this time, the roll 2 does not rotate and is stopped.

  Next, as shown in FIG. 3, while holding the Banbury kneaded rubber R between the side guides 3a and 3b, the side guides 3a and 3b are moved so as to be narrowed at a predetermined interval in the roll width direction. Thereby, the Banbury kneaded rubber R is gathered closely between the side guides 3a and 3b, and the movement in the roll width direction is restricted.

  This predetermined interval is substantially the same as the width of the pusher 4, and a rubber sheet having the same width as this interval is formed. Thereby, it is not necessary to change the width of the pusher 4 according to the rubber type, the rubber amount, etc., and one pusher 4 can cope with it. In this embodiment, both side guides 3a and 3b are moved in the roll width direction, but at least one of them may be moved.

  Next, as shown in FIG. 4, the pusher 4 is advanced toward the roll 2 and inserted between the side guides 3 a and 3 b, and the Banbury kneading rubber R is pushed between the rotating rolls 2. The Banbury kneaded rubber R is surrounded by both side guides 3a, 3b and the pusher 4 so that its movement is restricted. Therefore, even if the Banbury kneaded rubber R having high viscosity and high rigidity is danced on the roll 2, It will bite uniformly between the rolls 2 at intervals.

  In this way, a rubber sheet having a predetermined width without any edge breakage is easily formed by passing between the rolls 2.

  Here, when the Banbury kneading rubber R is pressed by the pusher 4, both side guides 3a and 3b are moved in the roll width direction. That is, the short section is repeatedly reciprocated in the roll width direction so that the side guides 3a and 3b do not contact the pusher 4. The short section is, for example, 1 to 20 cm wide, and the time required for one cycle of repeated reciprocating movement is, for example, about 2 to 20 seconds.

  By this swing, the Banbury kneaded rubber R can be prevented from being caught in the pusher 4, the side guide 3, and the roll 2, and stuck in the gap. As a result, mixing into the Banbury kneaded rubber R to be subsequently seated can be prevented, and quality can be improved.

  In order to maximize the above effect, it is preferable to swing both side guides 3a and 3b. However, even if only one of the side guides 3a and 3b is swung, a certain effect can be obtained.

  If the pusher 4 gets too close to the roll 2, the stopper 5 comes into contact with the side guides 3a and 3b to restrict the forward movement and prevent the pusher 4 and the roll 2 from contacting each other. The roll 2 is prevented from being damaged.

  The stopper 5 is not limited to that shown in the embodiment, and a stopper that prevents contact between the pusher 4 and the roll 2 can be employed.

1 is a partially transparent side view illustrating an overall outline of a rubber sheeting device of the present invention. It is explanatory drawing which illustrates the 1st process of the formation method of the rubber sheet of this invention. It is explanatory drawing which illustrates the 2nd process of the formation method of the rubber sheet of this invention. It is explanatory drawing which illustrates the 3rd process of the formation method of the rubber sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rubber sheeting device 2, 2a, 2b Roll 3, 3a, 3b Side guide 4 Pusher 5 Stopper 6 Supply conveyor belt 7 Delivery conveyor belt

Claims (3)

  In a rubber sheeting apparatus for forming a rubber sheet by pushing a kneaded rubber released from a hermetic mixer between a pair of opposed rotating rolls with a pusher to form a rubber sheet, the rubber is separated in the roll width direction above the pair of rolls. A pair of side guides facing each other, moving at least one of the pair of side guides in the roll width direction and holding the kneaded rubber put between both side guides while being arranged at a predetermined interval, The pusher that advances and retreats with respect to a pair of rolls can be moved forward and inserted between both side guides arranged at the predetermined interval, and at least one of the side guides swings in the roll width direction with the pusher inserted. A rubber sheeting device characterized by being made possible.   The rubber sheeting device according to claim 1, further comprising a stopper that restricts a forward movement range of the pusher to prevent contact with the roll.   In a method of forming a rubber sheet, in which a kneaded rubber discharged from a hermetic mixer is passed between a pair of rotating rolls pressed against each other by a pusher, the rubber sheets are opposed to each other in the roll width direction above the pair of rolls. The kneaded rubber is put between a pair of provided side guides, and while holding the kneaded rubber, at least one of the pair of side guides is moved in the roll width direction so that both the side guides are arranged at a predetermined interval. The pusher that advances and retreats with respect to the pair of rolls is moved forward and inserted between both side guides arranged at a predetermined interval to push the kneaded rubber between the rolls, and at least one of the side guides has a roll width. A method for forming a rubber sheet, characterized by passing between the rolls while swinging in a direction.

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