JP2005231057A - Exhaust device of kneader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the exhaust device of a kneader capable of efficiently exhausting the gas discharged from the inside of a hopper when kneading a rubber material. <P>SOLUTION: Since an exhaust duct 34 is connected to the hopper 32 to exhaust the gas in the hopper 32 by a blower, the gas discharged from the rubber material A can be exhausted certainly and, when the rubber material A is formed into a sheetlike shape, the slip of a roller die 30 caused by the dewing of the gas is reduced to enhance the capacity of the roller die 30. Further, since the open air can be allowed to flow in the hopper 32, the gas in the hopper 32 can be certainly exhausted and the slip of the roller die 30 caused when the rubber material A is formed into the sheetlike shape can be further reduced and the treatment capacity of the roller die 30 can be further enhanced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an exhaust device of a rubber kneader for kneading a rubber material that is a raw material of a tire component, for example, in the manufacture of a tire.

Conventionally, in a process of kneading a rubber material that is a constituent member of a tire, a rubber material such as natural rubber or synthetic rubber is put into a kneader body together with other compounding agents, kneaded, and discharged from the kneader body A material is known in which a material is received by a hopper and molded into a sheet by a sheet molding machine such as a roller die connected to the lower end of the hopper (see, for example, Patent Document 1). At this time, since the rubber material kneaded in the kneading machine main body releases a gas (volatile matter or the like), the material discharge port provided in the lower part of the kneading machine main body and the upper surface of the hopper to prevent the diffusion of this gas The space between is separated from the outside. However, the gas generated from the rubber material is condensed in the kneader main body and in the hopper, and slipping occurs due to the condensed liquid when kneading the rubber material or molding the rubber material into a sheet shape. There is a drawback that the capacity of the molding machine is reduced. Therefore, an exhaust duct is provided below the kneading machine main body so that the gas in the kneading machine main body and the hopper is discharged to the outside by an exhaust means.
Japanese Patent Laid-Open No. 7-9436

  However, in the case where the exhaust duct is provided below the kneading machine main body, when the rubber material is kneaded, since the material discharge port of the kneading machine is closed, the amount of inflow of external air is reduced, and the hopper When the distance to the connection position of the exhaust duct is long, there is a problem that the gas released from the rubber material cannot be exhausted sufficiently. Further, when the material discharge port of the kneader is opened to discharge the rubber material, the discharge door to the exhaust duct is closed by the discharge door by opening the discharge door provided at the material discharge port. However, there is a problem that the gas released from the rubber material cannot be exhausted sufficiently.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an exhaust device for a kneading machine capable of efficiently exhausting a gas released during kneading of a rubber material from the hopper. There is to do.

  In order to achieve the above object, the present invention provides a kneader main body for kneading rubber material, a discharge door for opening and closing a material discharge port provided on the lower surface of the kneader main body, and a rubber material discharged from the material discharge port. In an exhaust apparatus of a kneader having an hopper for receiving and an exhaust means for exhausting the inside of the hopper, the exhaust means includes an exhaust duct connected to the hopper and an exhaust fan connected to the exhaust duct. ing. Thus, the inside of the hopper is exhausted by the exhaust duct and the exhaust fan, so that the gas released during the kneading is surely exhausted to the outside.

  According to the present invention, since the gas released during kneading can be reliably exhausted to the outside, for example, when the rubber material is formed into a sheet shape, the sliding of the roller die caused by the condensation of the gas is reduced, The ability of the roller die can be improved.

  1 to 3 show an embodiment of the present invention. FIG. 1 is a side sectional view of an exhaust device of a kneader, and FIGS. 2 and 3 are side sectional views showing the flow of air in the kneader.

  This kneading machine exhaust device includes a kneading machine main body 10 in which the rubber material A is kneaded, a material discharge chamber 20 in which the rubber material A is discharged from the kneading machine main body 10, and the discharged rubber material A is formed into a sheet shape. And a roller die 30 to be configured.

  The kneading machine main body 10 includes a kneading part 11 in which the rubber material A and the compounding agent are kneaded, a pair of rotors 12 rotatably provided in the kneading part 11, and the rubber material A in the kneading part 11 from above. And a ram 13 for pressurization.

  The kneading part 11 accommodates each rotor 12 in the lower part, and the opening part 11a is provided in the upper surface center part. A first charging port 11b is provided at an upper portion of one side surface of the kneading unit 11, and the rubber material A conveyed by the first conveyor 11c is charged into the first charging port 11b. A second charging port 11d is provided in the upper part of the other side surface of the kneading part 11, and the compounding agent conveyed by the second conveyor 11e is charged into the second charging port 11d. Further, a drop door 11 f as a discharge door for discharging the rubber material A in the kneading part 11 downward is provided on the lower surface of the kneading part 11.

  The rotors 12 are arranged in the width direction of the kneading unit 11 and are rotated in a predetermined direction by a motor (not shown) so that the rubber material A in the kneading unit 11 is kneaded.

  The ram 13 is formed in a shape capable of closing the opening 11a of the kneading part 11, and is provided so as to be movable in the vertical direction in the kneading part 11 by a shaft 13a connected to the upper end thereof. The ram 13 is configured to pressurize the rubber material A in the kneading unit 11 by lowering the kneading unit 11 by its own weight or an air pressure and hydraulic pressure supply device (not shown).

  The material discharge chamber 20 is formed between the kneader main body 10 and the slab 20a so as to partition the lower part of the drop door 11f from the outside, and the rubber material A kneaded in the kneader main body 10 is discharged. ing. The material discharge chamber 20 is connected to a first exhaust duct 21 for exhausting the gas released from the rubber material A, and the air in the material discharge chamber 20 is exhausted to the outside by a blower (not shown). It is like that.

  The roller die 30 receives the rubber material A discharged from the kneading machine main body 10 in a hopper 32 provided on the upper portion of the roller die main body 31, and the received rubber material A is formed by a pair of rollers 33 provided on the roller die main body 31. It consists of a known molding machine that forms a sheet. The upper surface opening of the hopper 32 communicates with the material discharge chamber 20 via the slab 20a and is positioned below the drop door 11f. A second exhaust duct 34 for exhausting the gas released from the rubber material A is connected to one side surface of the hopper 32, and the air in the hopper 32 is externally discharged by a blower 34 a provided in the exhaust duct 34. It is supposed to be exhausted. Further, an intake duct 35 for supplying external air into the hopper 32 is connected to the other side surface of the hopper 32, and an opening / closing valve 36 serving as a duct opening / closing means for opening or closing the inside of the intake duct 35 is connected to an end thereof. Is provided. The opening / closing valve 36 is configured to open and close the inside of the duct by a motor, such as a motor damper, for example. Thus, when the opening of the drop door 11f is detected, the on-off valve 36 is closed.

  In the exhaust device of the kneader configured as described above, first, natural rubber and synthetic rubber as the rubber material A and carbon, zinc oxide, anti-aging agent, etc. as the compounding agent are put into the kneader main body 10. Then, the ram 13 is lowered to pressurize the rubber material A, and each rotor 12 is rotated to start kneading. When the kneading is completed, the rubber material A is received by the hopper 32 through the material discharge chamber 20 by opening the drop door 11f, and the rubber material A is formed into a sheet shape by the roller die 30. At this time, when the drop door 11f is closed, the on-off valve 36 is opened, and as shown in FIG. 2, outside air is supplied into the material discharge chamber 20 and the hopper 32, and the exhaust ducts 21, The gas discharged from the rubber material A is exhausted from 34. Further, since the on-off valve 36 is closed when the drop door 11f is open, external air is not supplied from the intake duct 35 as shown in FIG. External air is supplied from the two inlets 11b and 11d. As a result, external air is supplied into the kneader main body 10, the material discharge chamber 20, and the hopper 32, but the drop door 11f becomes an obstacle on the exhaust passage to the first exhaust duct, and the first exhaust duct. From 21, the gas released from the rubber material A is difficult to be exhausted. However, the gas released from the rubber material A is exhausted from the second exhaust duct 34.

  As described above, according to the exhaust device of the kneader of the present embodiment, the exhaust duct 34 is connected to the hopper 32 and the inside of the hopper 32 is exhausted by the blower. Thus, when the rubber material A is formed into a sheet shape, the slippage of the roller die 30 caused by the condensation of the gas can be reduced, and the capability of the roller die 30 can be improved.

  Further, since external air can be introduced into the hopper 32, the gas in the hopper 32 can be exhausted efficiently, and the slippage of the roller die 30 that occurs when the material is formed into a sheet is further reduced. The processing capability of the roller die 30 can be further improved.

  Further, since the intake duct 35 connected to the hopper 32 is opened when the drop door 11f is closed and the opening / closing valve 36 is provided to close the intake duct 35 when the drop door 11f is opened, the drop door 11f is provided. When is opened, external air can be introduced from the inlet of the kneading machine main body 10, and the gas released into the kneading machine main body 10 can be efficiently exhausted.

  In the above embodiment, the second exhaust duct 34 and the intake duct 35 are linearly formed and connected from the side surface of the hopper 32. However, as shown in FIG. The rubber material A discharged into the hopper 32 is connected to a position higher than the height placed in the hopper 32, and is connected obliquely from above at an angle of 45 degrees or more, so that the inside of the second exhaust duct 34 and the intake duct 35 It is possible to prevent the rubber material A from entering.

Side surface sectional drawing of the exhaust apparatus of the kneading machine which shows one Embodiment of this invention Side sectional view showing air flow in kneader Side sectional view showing air flow in kneader Side sectional view of the main part of a hopper showing another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Kneading machine main body, 11f ... Drop door, 32 ... Hopper, 34 ... Second exhaust duct, 34a ... Blower, 35 ... Intake duct, 36 ... Open / close valve, A ... Rubber material.

Claims (4)

A kneader main body for kneading rubber material, a discharge door for opening and closing a material discharge port provided on the lower surface of the kneader main body, a hopper for receiving the rubber material discharged from the material discharge port, and an exhaust for exhausting the inside of the hopper In an exhaust device of a kneader equipped with means,
The exhaust device for a kneader characterized in that the exhaust means is composed of an exhaust duct connected to a hopper and an exhaust blower connected to the exhaust duct. The exhaust device for a kneader according to claim 1, further comprising an intake means for allowing air to flow into the hopper from outside. The intake means is composed of an intake duct connected to a hopper and a duct opening / closing means that opens the intake duct when the discharge door is closed and closes the intake duct when the discharge door is opened. The exhaust device for a kneader according to claim 1 or 2, characterized in that The exhaust device for a kneader according to claim 1, 2, 3, or 4, wherein the exhaust duct and the intake duct are connected to a hopper obliquely from above.

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