Apparatus and method for manufacturing rubber sheet

Patent metadata

Field	Value
Publication number	US-2016361847-A1
Application number	US-201615176491-A
Country	US
Kind code	A1
Filing date	Jun 8, 2016
Priority date	Jun 11, 2015
Publication date	Dec 15, 2016
Grant date	—

Abstract

In one embodiment of an apparatus for manufacturing a rubber sheet, a continuous rubber material is supplied onto a supply conveyor in a meandering state by supplying the continuous rubber material onto the supply conveyor while moving rubber supply device in a reciprocating manner in a roll axial direction. The rubber supply device has a full width moving mode in which the rubber supply device moves in the roll axial direction such that the continuous rubber material has a meandering shape of a width corresponding to a width of a rubber sheet, and a partial width moving mode in which the rubber supply device moves in the roll axial direction such that the continuous rubber material has a meandering shape of a width obtained by excluding widths of both edge portions of the rubber sheet from the width of the rubber sheet.

First claim

What is claimed is:

1 . An apparatus for manufacturing a rubber sheet comprising:
a pair of calender rolls which forms a bank as a rubber pool; a supply conveyor which supplies a continuous rubber material to the calender rolls for forming the bank; and a rubber supply device which supplies the continuous rubber material onto the supply conveyor in a meandering state by supplying the continuous rubber material onto the supply conveyor while moving in a reciprocating manner in an axial direction of the calender rolls, wherein the rubber supply device has a full width moving mode in which the rubber supply device moves in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a meandering shape of a width corresponding to a width of a rubber sheet, and a partial width moving mode in which the rubber supply device moves in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a meandering shape of a width obtained by excluding widths of both edge portions of the rubber sheet from the width of the rubber sheet.

2 . The apparatus for manufacturing a rubber sheet according to claim 1 further comprising:
a sensor which detects an amount of bank at both end portions in the axial direction of the calender rolls; and
a controller which sets a swing width of the rubber supply device in the partial width moving mode from the center of the width of the rubber sheet such that the swing width on an end portion side where an amount of bank is small out of amounts of banks at said both end portions detected by the sensor is larger than the swing width on an end portion side where an amount of bank is large.

3 . The apparatus for manufacturing a rubber sheet according to claim 2 , wherein
the rubber supply device has a one-side moving mode in which the rubber supply device moves in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a shape which meanders only on one side with respect to the center of the width of the rubber sheet, and the controller is configured so as to: operate the rubber supply device in a partial width moving mode in which the swing width is set uniformly on left and right sides when the difference between amounts of banks at said both end portions detected by the sensor is less than a first threshold value, operate the rubber supply device in a partial width moving mode in which the swing width on the end portion side where the amount of bank is small is set larger than the swing width on the end portion side where the amount of bank is large when the difference between amounts of banks at said both end portions detected by the sensor is equal to or more than the first threshold value and less than a second threshold value larger than the first threshold value, and operate the rubber supply device in the one-side moving mode in which the continuous rubber material is supplied only to the end portion side where the amount of bank is small when the difference between amounts of banks at said both end portions detected by the sensor is the second threshold value or more.

4 . The apparatus for manufacturing a rubber sheet according to claim 1 , wherein
the rubber supply device comprises an extruder which continuously extrudes a rubber material, and an oscillating conveyor which supplies an extruded continuous rubber material to the supply conveyor, and the oscillating conveyor is configured such that an end portion of the oscillating conveyor on a supply conveyor side is movable in a reciprocating manner in the axial direction of the calender rolls using an end portion of the oscillating conveyor on an extruder side as a pivot thus enabling the supply of the continuous rubber material onto the supply conveyor in a meandering state.

5 . A method for manufacturing a rubber sheet where a bank which constitutes a rubber pool is formed on calender rolls by continuously supplying a rubber material to the calender rolls from a supply conveyor, and the rubber material in the bank is formed into a sheet shape by rolling, wherein
the method comprises a rubber supply step of supplying a continuous rubber material onto the supply conveyor in a meandering state by supplying the continuous rubber material to the supply conveyer from a rubber supply device while moving the rubber supply device in a reciprocating manner in an axial direction of the calender rolls, and the rubber supply step comprises: a full width moving step of moving the rubber supply device in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a meandering shape of a width corresponding to a width of a rubber sheet; and a partial width moving step of moving the rubber supply device in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a meandering shape of a width obtained by excluding widths of both edge portions of the rubber sheet from the width of the rubber sheet.

6 . The method for manufacturing a rubber sheet according to claim 5 , wherein
an amount of bank at both end portions in the axial direction of the calender rolls is detected by a sensor; and a swing width of the rubber supply device in the partial width moving step from the center of the width of the rubber sheet is set such that the swing width on an end portion side where an amount of bank is small out of amounts of banks at said both end portions detected by the sensor is larger than the swing width on an end portion side where an amount of bank is large.

7 . The method for manufacturing a rubber sheet according to claim 6 , wherein
the rubber supply step includes a one-side moving, step in which the rubber supply device is moved in the axial direction of the calender rolls such that the continuous rubber material placed on the supply conveyor has a shape which meanders only on one side with respect to the center of the width of the rubber sheet, and the partial width moving step in which the swing width is set uniformly on left and right sides is performed when the difference between amounts of banks at said both end portions detected by the sensor is less than a first threshold value, the partial width moving step in which the swing width on the end portion side where the amount of hank is small is set larger than the swing width on the end portion side where the amount of bank is large is performed when the difference between amounts of banks at said both end portions detected by the sensor is equal to or more than the first threshold value and less than a second threshold value larger than the first threshold value, and the one-side moving step in which the continuous rubber material is supplied only to the end portion side where the amount of bank is small is performed when the difference between amounts of banks at said both end portions detected by the sensor is the second threshold value or more.

8 . The method for manufacturing a rubber sheet according to claim 5 , wherein
the rubber supply step is performed such that a rubber material is continuously extruded front an extruder, and an extruded continuous rubber material is supplied onto the supply conveyor by way of an oscillating conveyor, and an end portion of the oscillating conveyor on a supply conveyor side is moved in a reciprocating manner in the axial direction of the calender rolls using an end portion of the oscillating conveyor on an extruder side as a pivot thus supplying the continuous rubber material onto the supply conveyor in a meandering state.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Ishida Takuya
• Itakura Junji

Classifications

• B29K2021/00

  Use of unspecified rubbers as moulding material · CPC title

• B29C43/245 Primary

  Adjusting calender parameters, e.g. bank quantity · CPC title

• B29C69/001

  a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts (for reinforced material B29C70/545; B29C49/4278, B29C51/268 take precedence) · CPC title

• B29C43/34

  Feeding the material to the mould or the compression means {(B29C43/085 takes precedence)} · CPC title

• B29L2007/002

  Panels; Plates; Sheets · CPC title