WO2014129121A1 - 積層体の製造方法 - Google Patents
積層体の製造方法 Download PDFInfo
- Publication number
- WO2014129121A1 WO2014129121A1 PCT/JP2014/000479 JP2014000479W WO2014129121A1 WO 2014129121 A1 WO2014129121 A1 WO 2014129121A1 JP 2014000479 W JP2014000479 W JP 2014000479W WO 2014129121 A1 WO2014129121 A1 WO 2014129121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rubber
- sheet
- laminated
- pair
- belt core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/28—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
- B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
- B29C66/92615—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools the gap being non-constant over time
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- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/10—Extrusion moulding
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Definitions
- the present invention relates to a method for manufacturing a laminate.
- the belt core, the front cover rubber laminated on the front and back surfaces of the belt core, the back cover rubber, and the cover rubber are arranged on both sides in the width direction of the belt core.
- gum is known.
- a method of manufacturing such a conveyor belt (1) a step of mixing rubber materials, (2) a step of rolling and molding a belt core, (3) a step of rolling and molding a cover rubber, (4 ) A step of molding the ear rubber; (5) a step of gathering the materials supplied from these separate and independent steps (2), (3) and (4) to form a conveyor belt; It is known to comprise a step of vulcanizing a formed conveyor belt and a step of finishing a conveyor belt after vulcanization.
- the thickness of the conveyor belt as a product finally obtained becomes the sum total of the thickness of a belt core and cover rubber. Since these belt cores, cover rubbers, and ear rubbers are manufactured in individual steps, thickness variations occur, so there is a limit in reducing the thickness variations of the conveyor belt that is finally molded. is there. If the thickness of the conveyor belt is too large, there is a disadvantage that the surface of the conveyor belt is likely to break down in the vulcanization process, and that the material is wasted and the manufacturing cost is increased.
- Patent Document 1 on one side of the belt core unwound from the unwinding stand for the core, the cover rubber is extruded and rolled from the first extrusion rolling device, and on the other side of the belt core, Cover rubber is extruded and rolled from the second extrusion rolling device, and the formed rubber sheet is continuously vulcanized while being continuously supplied corresponding to the vulcanization time of the continuous vulcanizer. It is disclosed that the conveyor belt body thus formed is continuously wound by a winding device.
- the present invention includes a first step of forming a first sheet-like member by rolling a rubber material extruded from a first rubber extruder with a first pair of rolling rolls.
- the first sheet-like member and the second sheet-like member are overlapped with the second sheet-like member supplied from the original fabric and rolled with a second pair of rolling rolls.
- the thickness of the first sheet-like member can be adjusted according to the variation in the thickness of the second sheet-like member so that the thickness of the laminated body matches the target value. This is advantageous in reducing variations in the thickness of the laminate in which the first sheet-like member and the second sheet-like member are laminated.
- the manufacturing method of the laminated body of embodiment of this invention is demonstrated with reference to drawings.
- the laminated body is a belt core body
- the laminated body is an intermediate product such as an intermediate laminated body described later
- a case where the laminated body is a conveyor belt as a final product
- FIG. 1 is a cross-sectional view of a conveyor belt 10 cut along a plane parallel to the width direction thereof, (A) shows a state before cutting both side ends B, and (B) shows a state after cutting both side ends B. Indicates the state.
- the conveyor belt 10 includes a belt core body 12, a first cover rubber 14 ⁇ / b> A, a second cover rubber 14 ⁇ / b> B, and an ear rubber 16.
- the belt core body 12 is formed by laminating a plurality of belt core bodies 12A.
- the belt core body 12A is composed of a fiber reinforcement layer 1202 and a first coated rubber laminated on one surface of the fiber reinforcement layer 1202.
- the front cover rubber of the belt conveyor 10 on which articles are placed is constituted by the first cover rubber 14A
- the back cover rubber of the belt conveyor 10 is constituted by the second cover rubber 14B.
- the present invention is naturally applicable even when the front cover rubber is constituted by the second cover rubber 14B and the back cover rubber is constituted by the first cover rubber 14A.
- the ear rubber 16 is disposed on both sides of the belt core 12 in the width direction between the first cover rubber 14A and the second cover rubber 14B.
- Reference numeral 1402 denotes an ear rubber placement surface in the second sheet-like member S2 in which a belt core 12 and a second cover rubber 14B described later are laminated. That is, in the second sheet-like member S2, the width of the belt core 12 is smaller than the width of the second cover rubber 14B, and the width direction of the surface of the second cover rubber 14B on which the belt core 12 is laminated.
- the conveyor belt 10 is manufactured by the following process. 1) Manufacture of belt core body 12A: First and second coat rubbers 1204A and 1204B are laminated on the fiber reinforcing layer 1202. 2) Manufacture of belt core body 12: A plurality of single belt core bodies 12A are laminated. 3) Production of first intermediate laminated body: The second cover rubber 14B is laminated on the belt core body 12. 4) Manufacture of conveyor belt 10: The ear rubber 16 is laminated on the first intermediate laminate, and the first cover rubber 14A is laminated. The manufacturing method of the laminated body which concerns on this invention is applied to the process of said 1), 2) and 4).
- the manufacturing apparatus 30 includes a first rubber extruder 32, a second rubber extruder 34, a first pair of rolling rolls 36 and 36, and a second pair of rollers.
- the first rubber extruder 32 discharges a rubber material supplied through a cylinder cylinder 3202 having a screw shaft built therein from a die of an extrusion head as a sheet-like member before rolling.
- the first rubber extruder 32 has a structure in which a head base and a plate capable of changing the fluidity inside the head can be attached and detached according to the characteristics of the rubber in order to flatten the cross-sectional shape of the sheet-like member before rolling. Yes.
- the second rubber extruder 34 discharges the rubber material supplied through a cylinder tube 3402 with a screw shaft built therein from the die of the extrusion head as the ear rubber 16.
- FIG. 6 illustrates the case where two ear rubbers 16 are discharged from one second rubber extruder 34, two second rubber extruders 34 are provided, and these second rubber extruders are provided.
- One ear rubber 16 may be discharged from each of 34.
- the first pair of rolling rolls 36, 36 is supported so as to be rotatable with an axis line in the horizontal direction at an interval in the vertical direction, and is driven to rotate in directions opposite to each other.
- the member is rolled to form the first sheet-like member S1.
- the first pair of rolling rolls 36, 36 are provided such that the gap between them can be adjusted by a rolling roll gap adjusting actuator 58, and the thickness of the first sheet-like member S1 is adjusted by adjusting the gap. Adjusted.
- the first pair of rolling rolls 36, 36 are provided so that the crossing angle of the axes of the rolling rolls 36, 36 can be adjusted by a cross adjusting actuator (not shown), and the first sheet is obtained by adjusting the crossing angle.
- the flatness of the shaped member S1 is adjusted.
- reference numeral 37 denotes a guide roll for guiding the first sheet-like member S1 to the second pair of rolling rolls 38.
- the second pair of rolling rolls 38, 38 is rotatably supported with an axis line in the horizontal direction with an interval in the vertical direction, and is driven to rotate in directions opposite to each other.
- the first sheet-like member S1 And the second sheet-like member S2 supplied from the original fabric are stacked and rolled to continuously form a laminate in which the first sheet-like member S1 and the second sheet-like member S2 are laminated.
- reference numeral 39 denotes a guide roll for guiding the laminated body fed from the second pair of rolling rolls 38 to the downstream side.
- the second pair of rolling rolls 38, 38 are provided so that the gap between them can be adjusted by a rolling roll gap adjusting actuator (not shown), and the laminated sheet-like member (first The thickness of the laminated body in which the sheet-like member S1 and the second sheet-like member S2 are laminated is regulated.
- the third pair of rolling rolls 40, 40 are rotatably supported with an axis line in the horizontal direction with an interval in the vertical direction, and are driven to rotate in directions opposite to each other.
- the 3rd pair of rolling rolls 40 and 40 make 2nd sheet-like member S2 supplied from an original fabric 2nd pair. While functioning as a guide roll leading to the rolling rolls 38, 38, the ear rubber 16 extruded from the second rubber extruder 34 is laminated on the second sheet-like member S 2 by rolling.
- the 3rd pair of rolling rolls 40 and 40 turns 2nd sheet-like member S2 supplied from an original fabric into 2nd pair of rolling rolls. It functions only as a guide roll leading to 38,38.
- one rolling roll 38 of the second pair of rolling rolls 38 and 38 and one rolling roll 40 of the third pair of rolling rolls 40 and 40 are also used.
- the positioning means 42 is a width of the second cover rubber 14B of the ear rubber 16 pushed out from the second rubber extruder 34 with respect to the ear rubber mounting surface 1402 of the second sheet-like member S2 described in FIG. Positioning in the direction is performed.
- the positioning means 42 is provided on the frame of the manufacturing apparatus 30 and extends along the width direction of the second sheet-like member S2, the moving body 4204 provided so as to be slidable along the rail 4202, and the movement A guide roll 4206 that is integrally attached to the body 4204 and guides the ear rubber 16, and an ear rubber position adjusting actuator 60 that slides the moving body 4204 are configured.
- the ear rubber position adjusting actuator 60 various conventionally known mechanisms such as a mechanism using a feed screw and a motor and a mechanism using a hydraulic cylinder can be used.
- the cutting means 44 cuts both side ends B in the width direction of the laminated body fed from the second pair of rolling rolls 38, 38 with a cutter.
- an imaginary line indicates a cut portion.
- the conveying means (not shown) continuously returns the cut side end portions B to the upstream side of the first rubber extruder 32. Therefore, the cut both side ends B are used as a rubber material by the first rubber extruder 32.
- the first thickness detection sensor 46 detects the thickness d1 of the first sheet-like member S1 rolled by the first pair of rolling rolls 36, 36.
- the second thickness detection sensor 48 detects the thickness d2 of the second sheet-like member S2 supplied from the original fabric.
- the 3rd thickness detection sensor 50 detects thickness d3 of the laminated body sent out from a 2nd rolling roll.
- various conventionally known sensors such as a contact type or a non-contact type can be used.
- the belt core position detection sensor 52 detects the positions of the end faces on both sides in the width direction of the belt core 12 immediately before being rolled by the third pair of rolling rolls 40, 40.
- the ear rubber position detection sensor 54 detects the position in the width direction of the ear rubber 16 immediately before being rolled by the third pair of rolling rolls 40, 40.
- the belt core position detection sensor 52 irradiates linear detection light so as to be orthogonal to the end surface in the width direction of the belt core 12 and detects the reflected light, thereby detecting the lower rubber sheet (second cover rubber 14B).
- the core body (belt core body 12) can be used as a two-dimensional displacement sensor that detects the positions of the end faces on both sides of the belt core body 12 in the width direction.
- the ear rubber position detection sensor 54 irradiates the linear detection light so as to be orthogonal to the end surface in the width direction of the ear rubber 16 and detects the reflected light, thereby detecting the end position of the ear rubber 16.
- a two-dimensional displacement sensor that detects the position of the ear rubber 16 in the width direction can be used.
- the control means 56 has an interface with a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an EEPROM that holds various data in a rewritable manner, and peripheral circuits. And a microcomputer including an interface unit.
- the control means 56 executes the control program, thereby detecting the detection result of the thickness d1 of the first sheet-like member S1 detected by the first thickness detection sensor 46 and the second thickness detection sensor. From the detection result of the thickness d2 of the second sheet-like member S2 supplied from the original fabric detected at 48 and the second pair of rolling rolls 38, 38 detected by the third thickness detection sensor 50 The gap between the first pair of rolling rolls 36 and 36 is controlled by driving the rolling roll gap adjusting actuator 58 based on the detection result of the thickness d3 of the fed laminate. Thereby, the thickness d3 of the laminated body fed out from the second pair of rolling rolls 38, 38 is controlled to be a target value.
- control means 56 detects the positions of the end faces on both sides in the width direction of the belt core 12 immediately before being rolled by the third pair of rolling rolls 40, 40 detected by the belt core position detection sensor 52.
- the ear by the positioning means 42 based on P1 and the detection result of the position P2 in the width direction of the ear rubber 16 immediately before being rolled by the third pair of rolling rolls 40, 40 detected by the ear rubber position detection sensor 54.
- the positioning of the rubber 16 is controlled. As a result, as shown in FIG. 1 (A), no gap is formed between the end faces 1210 on both sides in the width direction of the belt core 12 and the ear rubber 16, and the ear rubber 16 does not overlap. Is laminated on the second cover rubber 14B.
- the manufacturing process of the conveyor belt 10 is as follows: 1) manufacture of the belt core unit 12A, 2) manufacture of the belt core body 12, 3) manufacture of the first intermediate laminate, and 4) manufacture of the conveyor belt 10. This will be explained in the order. 3 to 5 shown below, in order to simplify the illustration, positioning means 42, cutting means 44, belt core position detection sensor 52, ear rubber position detection sensor 54, and ear rubber position adjustment actuator which are not used are used. Illustration of the actuator 60 and the like is omitted.
- a raw material of the fiber reinforcing layer 1202 is prepared. As shown in FIG. 3, the rubber material extruded from the first rubber extruder 32 is rolled by a first pair of rolling rolls 36, 36, and a first coat rubber 1204A as a first sheet-like member S1 is obtained. Form (first step). The first sheet-like member S1 and the fiber reinforcement layer 1202 as the second sheet-like member S2 supplied from the original fabric are overlapped and rolled by the second pair of rolling rolls 38, 38. The laminated body A1 in which the sheet-like member S1 and the second sheet-like member S2 are laminated is continuously manufactured (second step).
- the laminated body A1 is wound up by a winding device (not shown) to be a raw fabric. That is, the laminated body A1 constitutes a part in the thickness direction of the belt core body 12 of the conveyor belt 10 in which the first coat rubber 1204A is laminated on one surface of the fiber reinforcing layer 1202, in other words, This is an intermediate product of the belt core 12.
- a raw material of the laminate A1 manufactured as described above is prepared.
- the rubber material extruded from the first rubber extruder 32 is rolled by a first pair of rolling rolls 36, 36, and a second coat rubber 1204B as a first sheet-like member S1 is obtained.
- Form (first step) The first sheet-like member S1 and the laminate A1 as the second sheet-like member S2 supplied from the original fabric are overlapped and rolled with a second pair of rolling rolls 38, 38.
- the laminated body A2 in which the sheet-like member S1 and the second sheet-like member S2 are laminated is continuously manufactured (second step). Further, the gap between the first pair of rolling rolls 36, 36 is controlled by the control means 56 in the first step and the second step.
- the laminated body A2 is wound up by a winding device (not shown) to be a raw fabric. That is, the laminate A2 includes a fiber reinforcement layer 1202, a first coat rubber 1204A laminated on one surface of the fiber reinforcement layer 1202, and a second coat rubber 1204B laminated on the other surface of the core body. It is the belt core body 12A of the conveyor belt 10 comprised by these. By repeating such steps, a plurality of belt core members 12A are manufactured in advance.
- a belt core body 12 is manufactured by preparing an original fabric of a plurality of belt core bodies 12A obtained as described above and rolling them with a pair of unshown press-contacting rolls. To do.
- the belt core 12A is taken up by a take-up device (not shown) to form an original fabric.
- the laminated body A3 is wound up by a winding device (not shown) to be a raw fabric. That is, the laminate A3 includes the belt core 12 and the cover rubber (second cover rubber 14B) laminated on the belt core 12, and constitutes a part of the conveyor belt 10 in the thickness direction. It is 1st intermediate
- the position adjustment control of the ear rubber 16 by the control means 56 is performed.
- the first sheet-like member S1 and the second sheet-like member S2 (first intermediate laminate A3) and the second intermediate laminate A4 including the second pair of rolling rolls 38 are overlapped,
- a laminate A5 in which the first sheet-like member S1 and the second sheet-like member S2 are laminated is continuously manufactured (second step). Further, in the second step, both side ends B in the width direction of the laminate A5 fed from the second pair of rolling rolls 38, 38 are cut by a cutter of the cutting means 44 (FIG.
- the cut side ends B are continuously returned to the upstream side of the first rubber extruder 32 by a conveying means (not shown) and used as a rubber material.
- the control means 56 controls the gap between the first pair of rolling rolls 36 and 36.
- the laminate A5 is wound up by a winding device (not shown). That is, the laminated body A5 is the conveyor belt 10 including the belt core body 12, the first cover rubber 14A, the second cover rubber 14B, and the ear rubber 16.
- the method for manufacturing the conveyor belt 10 having the ear rubber 16 has been described.
- the method of the present invention can of course be applied to the conveyor belt 10 having no ear rubber 16.
- the manufacture of the 4) conveyor belt 10 described above is as follows.
- An original fabric of the first intermediate laminate A3 manufactured as described above is prepared.
- the rubber material extruded from the first rubber extruder 32 is rolled by a first pair of rolling rolls 36, 36 to form a first cover rubber 14A as a first sheet-like member S1 (first Process).
- the first sheet-like member S1 and the first intermediate laminate A3 as the second sheet-like member S2 are overlapped and rolled by the second pair of rolling rolls 38, 38.
- the laminated body in which the sheet-like member S1 and the second sheet-like member S2 are laminated is continuously manufactured (second step). Further, in the second step, the both ends B in the width direction of the laminate fed from the second pair of rolling rolls 38, 38 are cut by the cutter of the cutting means 44, and the cut both ends B are It is continuously returned to the upstream side of the first rubber extruder 32 and used as a rubber material.
- the control means 56 controls the gap between the first pair of rolling rolls 36 and 36.
- the laminate is wound up by a winding device (not shown). That is, the laminated body is a conveyor belt 10 constituted by a belt core body 12, a first cover rubber 14A, and a second cover rubber 14B.
- the first pair of rolling is performed when continuously producing a laminate in which the first sheet-like member S1 and the second sheet-like member S2 are laminated.
- the detection result of the thickness d1 of the first sheet-like member S1 rolled by the rolls 36, 36, the detection result of the thickness d2 of the second sheet-like member S2 supplied from the original fabric, and the thickness of the laminate The gap between the first pair of rolling rolls 36, 36 is controlled based on the detection result of the length d3. Therefore, the thickness of the first sheet-like member S1 can be adjusted according to the variation in the thickness of the second sheet-like member S2 so that the thickness of the laminated body matches the target value.
- the first sheet-like member S1 and the second sheet-like member S2 are rolled by the second pair of rolling rolls 38, the first sheet-like member S1 is pushed out from the first rubber extruder 32. Since it is immediately after, the 1st sheet-like member S1 is maintaining the state with high temperature. Therefore, since the first sheet-like member S1 and the second sheet-like member S2 are bonded together hot, both the first sheet-like member S1 and the second sheet-like member S2 or one of them. Even if it is a material with low tack (adhesiveness), these sheet-like members S1 and S2 can be securely bonded and laminated without using a solvent or the like, which is advantageous in improving the quality of the laminate. Become.
- the ear rubber 16 and the second cover rubber 14B of the first intermediate laminate A3 as the second sheet-like member S2 are rolled by the third pair of rolling rolls 40, 40, the ear rubber Since 16 is immediately after being extruded from the second rubber extruder 34, the ear rubber 16 maintains a high temperature state. Therefore, since the ear rubber 16 and the second sheet-like member S2 are bonded together hot, both or one of the ear rubber 16 and the second sheet-like member S2 has low tack (adhesiveness). Even if it is a material, these ear rubbers 16 and the second sheet-like member S2 can be reliably bonded and laminated without using a solvent or the like, which is advantageous in improving the quality of the laminate.
- the positioning means 42 positions the ear rubber 16. Take control. Therefore, the ear rubber 16 can be laminated on the second cover rubber 14B without forming a gap between the end faces 1210 on both sides in the width direction of the belt core 12 and the ear rubber 16, and the conveyor belt 10 This is advantageous in improving the quality of the product.
- both side ends B in the width direction of the laminate A5 fed from the second pair of rolling rolls 38, 38 are cut by the cutter of the cutting means 44, and the cut both side ends B was continuously returned to the upstream side of the first rubber extruder 32 by the conveying means and used as a rubber material. Therefore, it goes without saying that there is no need for a space for temporarily storing the cut ends B, and whenever a certain amount of the ends B is stored, a step away from the step of manufacturing the laminate, for example, The process of mixing the rubber material does not require the trouble of transporting a certain amount of both end portions B, which is advantageous in saving space and streamlining the manufacturing process.
- a manufacturing line is configured by independently providing an intermediate product manufacturing apparatus for the belt core body 12, a manufacturing apparatus for the belt core single body 12A, a manufacturing apparatus for the first intermediate laminate A3, and a manufacturing apparatus for the conveyor belt 10.
- the number of manufacturing equipment can be greatly reduced, which is extremely advantageous for space saving and rationalization of equipment, and it is not necessary to arrange workers for each manufacturing equipment. This is also advantageous for humanization.
- Cutting means 46 First thickness detection sensor, 48 ?? Second thickness detection sensor, 50 ?? Third thickness detection sensor, 52 ?? Belt core position detection sensor, 54 ?? Ear rubber position Detection sensor, 56 ... control means, 58 ... rolling Gap gap adjusting actuator, 60 ... Ear rubber position adjusting actuator, S1 ... first sheet-like member, S2 ... second sheet-like member, A1, A2 ... laminate, A3 ... laminate (first 1 intermediate laminate), A4... Laminate (second intermediate laminate), A5... Laminate, B...
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
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- Belt Conveyors (AREA)
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- Tyre Moulding (AREA)
Abstract
Description
従来、このようなコンベヤベルトの製造方法としては、(1)ゴム材料を混合する工程、(2)ベルト芯体を圧延、成型する工程、(3)カバーゴムを圧延、成型する工程、(4)耳ゴムを成型する工程と、(5)これらの分離独立した各工程(2)、(3)、(4)から供給される各材料を集合させてコンベヤベルトを成型する工程と、(6)成形されたコンベヤベルトを加硫する工程と、(7)加硫後のコンベヤベルトの仕上げを行なう工程とからなるものが知られている。
そして、最終的に得られる製品としてのコンベヤベルトの厚さは、ベルト芯体、カバーゴムの厚さの合計となる。
これらベルト芯体、カバーゴム、耳ゴムは、個々の工程で製造されることからそれぞれ厚さのばらつきが生じるため、最終的に成型されるコンベヤベルトの厚さのばらつきを低減する上で限界がある。
コンベヤベルトの厚さが大きすぎると、加硫工程でコンベヤベルトの表面に故障が発生しやすく、また、材料が無駄となり製造コストが嵩む不利がある。
また、特許文献1には、芯体用巻出しスタンドから巻出されたベルト芯体の一側面に、第1押出し圧延装置からカバーゴムを押出して圧延すると共に、ベルト芯体の他側面に、第2押出し圧延装置からカバーゴムを押出して圧延し、この成形されたゴムシートを、連続加硫機の加硫時間に対応して連続して供給しながら連続的に加硫し、この加硫されたコンベヤベルト本体を巻取り装置で連続的に巻取ることが開示されている。
本発明はこのような事情に鑑みなされたものであり、その目的は、第1のシート状部材と第2のシート状部材とが積層された積層体の厚さのばらつきを低減する上で有利な積層体の製造方法を提供することにある。
本実施の形態では、積層体がベルト芯体である場合、積層体が後述する中間積層体などの中間製品である場合、積層体が最終製品としてのコンベヤベルトである場合についてそれぞれ説明する。
図1はコンベヤベルト10をその幅方向と平行な面で破断した断面図であり、(A)は両側端部Bの切断前の状態を示し、(B)は両側端部Bの切断後の状態を示す。
コンベヤベルト10は、ベルト芯体12と、第1のカバーゴム14Aと、第2のカバーゴム14Bと、耳ゴム16とを含んで構成されている。
ベルト芯体12は、ベルト芯体単体12Aが複数枚積層されたものであり、ベルト芯体単体12Aは、繊維補強層1202と、繊維補強層1202の一方の面に積層される第1のコートゴム1204Aと、繊維補強層1202の他方の面に積層される第2のコートゴム1204Bとを含んで構成される。
第1のカバーゴム14Aは、ベルト芯体12の一方の面に積層されるものである。
第2のカバーゴム14Bは、ベルト芯体12の他方の面に積層されるものである。
本実施の形態では、物品が載置されるベルトコンベア10の表面カバーゴムが第1のカバーゴム14Aで構成され、ベルトコンベア10の裏面カバーゴムが第2のカバーゴム14Bで構成される場合について説明する。
しかしながら、上記とは逆に表面カバーゴムが第2のカバーゴム14Bで構成され、裏面カバーゴムが第1のカバーゴム14Aで構成される場合であっても本発明は無論適用される。
耳ゴム16は、第1のカバーゴム14Aと第2のカバーゴム14Bとの間でベルト芯体12の幅方向の両側部にそれぞれ配置されるものである。
また、符号1402は、後述するベルト芯体12と第2のカバーゴム14Bとが積層された第2のシート状部材S2における耳ゴム載置面を示す。すなわち、第2のシート状部材S2は、ベルト芯体12の幅が第2のカバーゴム14Bの幅よりも小さく、第2のカバーゴム14Bのうちベルト芯体12が積層された面の幅方向の両側に耳ゴム16の幅に対応した寸法で帯状に形成された耳ゴム載置面1402を有する。
コンベヤベルト10は、以下の工程で製造される。
1)ベルト芯体単体12Aの製造:繊維補強層1202に第1、第2のコートゴム1204A、1204Bを積層する。
2)ベルト芯体12の製造:複数のベルト芯体単体12Aを積層する。
3)第1の中間積層体の製造:ベルト芯体12に第2のカバーゴム14Bを積層する。
4)コンベヤベルト10の製造:第1の中間積層体に耳ゴム16を積層すると共に第1のカバーゴム14Aを積層する。
本発明に係る積層体の製造方法は、上記1)、2)、4)の工程に適用される。
図2、図6に示すように、製造装置30は、第1のゴム押出機32と、第2のゴム押出機34と、第1の一対の圧延ロール36、36と、第2の一対の圧延ロール38、38と、第3の一対の圧延ロール40、40と、位置決め手段42と、切断手段44と、不図示の搬送手段と、第1~第3の厚さ検出センサ46、48、50と、ベルト芯体位置検出センサ52と、耳ゴム位置検出センサ54と、制御手段56とを含んで構成されている。
第1のゴム押出機32は、圧延前のシート状部材の断面形状を平坦にする為に、ヘッドの口金及びヘッド内部の流動性を可変できるプレートをゴムの特性に応じて着脱可能な構造としている。
第2のゴム押出機34は、スクリュー軸が内装されたシリンダ筒3402を介して供給されるゴム材料を押出ヘッドの口金から押し出すことにより耳ゴム16として吐出するものである。図6では、1台の第2のゴム押出機34から2本の耳ゴム16を吐出する場合を例示するが、2台の第2のゴム押出機34を設け、それら第2のゴム押出機34からそれぞれ1本の耳ゴム16を吐出するようにしてもよい。
第1の一対の圧延ロール36、36は、それらの間のギャップが圧延ロールギャップ調整用アクチュエータ58によって調整可能に設けられ、ギャップが調整されることにより第1のシート状部材S1の厚さが調整される。
第1の一対の圧延ロール36、36は、それら圧延ロール36、36の軸の交差角が不図示の交差調整用アクチュエータによって調整可能に設けられ、交差角が調整されることにより第1のシート状部材S1の平坦性が調整される。
圧延ロールギャップ調整用アクチュエータ58、及び交差調整用アクチュエータは、例えば、送りねじとモータを用いた機構、油圧シリンダを用いた機構など従来公知のさまざまな機構が使用可能である。
図中、符号37は第1のシート状部材S1を第2の一対の圧延ロール38に案内するガイドロールである。
図中39は、第2の一対の圧延ロール38、38から送り出された積層体を下流に導くガイドロールである。
第2の一対の圧延ロール38、38は、それらの間のギャップが不図示の圧延ロールギャップ調整用アクチュエータによって調整可能に設けられ、ギャップが調整されることにより積層体シート状部材(第1のシート状部材S1と第2のシート状部材S2とが積層された積層体)の厚さが規制される。
第3の一対の圧延ロール40、40は、耳ゴム16を積層する積層体(コンベヤベルト10)を製造する場合に、原反から供給される第2のシート状部材S2を第2の一対の圧延ロール38、38に導くガイドロールとして機能すると共に、第2のゴム押出機34から押し出された耳ゴム16を、第2のシート状部材S2上に圧延することで積層させるものである。
また、第3の一対の圧延ロール40、40は、耳ゴム16を積層しない積層体を製造する場合には、原反から供給される第2のシート状部材S2を第2の一対の圧延ロール38、38に導くガイドロールとしてのみ機能する。
また、本実施の形態では、第2の一対の圧延ロール38、38の一方の圧延ロール38と、第3の一対の圧延ロール40、40の一方の圧延ロール40が兼用されている。
位置決め手段42は、製造装置30のフレームに設けられ第2のシート状部材S2の幅方向に沿って延在するレール4202と、レール4202に沿ってスライド可能に設けられた移動体4204と、移動体4204に一体的に取着され耳ゴム16を案内するガイドロール4206と、移動体4204をスライドさせる耳ゴム位置調整用アクチュエータ60とを含んで構成されている。
耳ゴム位置調整用アクチュエータ60は、例えば、送りねじとモータを用いた機構、油圧シリンダを用いた機構など従来公知のさまざまな機構が使用可能である。
不図示の搬送手段は、切断された両側端部Bを第1のゴム押出機32の上流側に連続的に戻すものである。したがって、切断された両側端部Bは、第1のゴム押出機32によりゴム材料として用いられる。
第2の厚さ検出センサ48は、原反から供給される第2のシート状部材S2の厚さd2を検出するものである。
第3の厚さ検出センサ50は、第2の圧延ロールから送り出される積層体の厚さd3を検出するものである。
第1~第3の厚さセンサ46、48、50としては、接触式、あるいは、非接触式など従来公知のさまざまなセンサが使用可能である。
耳ゴム位置検出センサ54は、第3の一対の圧延ロール40、40で圧延される直前の耳ゴム16の幅方向の位置を検出するものである。
ベルト芯体位置検出センサ52としては、線状の検出光をベルト芯体12の幅方向の端面と直交するように照射しその反射光を検出することで下面ゴムシート(第2のカバーゴム14B)と芯体(ベルト芯体12)との段差位置を、ベルト芯体12の幅方向の両側の端面の位置として検出する2次元の変位センサが使用可能である。
耳ゴム位置検出センサ54も上記と同様に、線状の検出光を耳ゴム16の幅方向の端面と直交するように照射しその反射光を検出することで耳ゴム16の端部位置を、耳ゴム16の幅方向の位置として検出する2次元の変位センサが使用可能である。
これにより、第2の一対の圧延ロール38、38から送り出される積層体の厚さd3が目標値となるように制御される。
これにより、図1(A)に示すように、ベルト芯体12の幅方向の両側の端面1210と耳ゴム16との間に隙間が形成されることなく、また重なり合う事がなく、耳ゴム16が第2のカバーゴム14B上に積層される。
なお、以下に示す図3~図5においては図示を簡略化するため、使用しない位置決め手段42、切断手段44、ベルト芯体位置検出センサ52、耳ゴム位置検出センサ54、耳ゴム位置調整用アクチュエータアクチュエータ60などの図示を省略する。
繊維補強層1202の原反を用意する。
図3に示すように、第1のゴム押出機32から押し出されたゴム材料を第1の一対の圧延ロール36、36で圧延して第1のシート状部材S1としての第1のコートゴム1204Aを形成する(第1の工程)。
第1のシート状部材S1と、原反から供給される第2のシート状部材S2としての繊維補強層1202とを重ね合わせて第2の一対の圧延ロール38、38で圧延することで第1のシート状部材S1と第2のシート状部材S2とが積層された積層体A1を連続的に製造する(第2の工程)。
また、第1の工程、第2の工程において制御手段56による第1の一対の圧延ロール36、36間のギャップ制御がなされる。
積層体A1は、不図示の巻き取り装置によって巻き取られて原反とされる。
すなわち、積層体A1は、繊維補強層1202の一方の面に第1のコートゴム1204Aが積層されるコンベヤベルト10のベルト芯体12の厚さ方向の一部を構成するものであり、言い換えると、ベルト芯体12の中間製品である。
図4に示すように、第1のゴム押出機32から押し出されたゴム材料を第1の一対の圧延ロール36、36で圧延して第1のシート状部材S1としての第2のコートゴム1204Bを形成する(第1の工程)。
第1のシート状部材S1と、原反から供給される第2のシート状部材S2としての上記積層体A1とを重ね合わせて第2の一対の圧延ロール38、38で圧延することで第1のシート状部材S1と第2のシート状部材S2とが積層された積層体A2を連続的に製造する(第2の工程)。
また、第1の工程、第2の工程において制御手段56による第1の一対の圧延ロール36、36間のギャップ制御がなされる。
積層体A2は、不図示の巻き取り装置によって巻き取られて原反とされる。
すなわち、積層体A2は、繊維補強層1202と、繊維補強層1202の一方の面に積層される第1のコートゴム1204Aと、芯体の他方の面に積層される第2のコートゴム1204Bとを含んで構成されるコンベヤベルト10のベルト芯体単体12Aである。
このような工程を繰り返すことにより、複数のベルト芯体単体12Aの原反を製造しておく。
上述のようにして得られた複数のベルト芯体単体12Aの原反を用意し、これらを不図示の一対の圧接ロールにより圧延することでベルト芯体12を製造する。ベルト芯体12Aは不図示の巻き取り装置によって巻き取られて原反とされる。
上述のように製造されたベルト芯体12の原反を用意する。
図5に示すように、第1のゴム押出機32から押し出されたゴム材料を第1の一対の圧延ロール36、36で圧延して第1のシート状部材S1としての第2のカバーゴム14Bを形成する(第1の工程)。
第1のシート状部材S1と、原反から供給される第2のシート状部材S2としてのベルト芯体12とを重ね合わせて第2の一対の圧延ロール38、38で圧延することで第1のシート状部材S1と第2のシート状部材S2とが積層された積層体A3を連続的に製造する(第2の工程)。
また、第1の工程、第2の工程において制御手段56による第1の一対の圧延ロール36、36間のギャップ制御がなされる。
積層体A3は、不図示の巻き取り装置によって巻き取られて原反とされる。
すなわち、積層体A3は、ベルト芯体12と、ベルト芯体12に積層されたカバーゴム(第2のカバーゴム14B)とを含んで構成されコンベヤベルト10の厚さ方向の一部を構成する第1の中間積層体A3である。
上述のように製造された第1の中間積層体A3の原反を用意する。
図6に示すように、第1のゴム押出機32から押し出されたゴム材料を第1の一対の圧延ロール36、36で圧延して第1のシート状部材S1としての第1のカバーゴム14Aを形成する(第1の工程)。
次に、第2のゴム押出機34から押し出された耳ゴム16を、原反から供給される第2のシート状部材S2としての第1の中間積層体A3のベルト芯体12の幅方向の両側部で第2のカバーゴム14B上に、第3の一対の圧延ロール40、40で圧延することで積層させた第2の中間積層体A4を形成する(第3の工程)。このとき、制御手段56による耳ゴム16の位置調整制御が行われる。
そして、第1のシート状部材S1と、第2のシート状部材S2(第1の中間積層体A3)を含む第2の中間積層体A4とを重ね合わせて第2の一対の圧延ロール38、38で圧延することで第1のシート状部材S1と第2のシート状部材S2とが積層された積層体A5を連続的に製造する(第2の工程)。
また、第2の工程において、第2の一対の圧延ロール38、38から送り出される積層体A5の幅方向の両側端部Bを切断手段44のカッターにより切断する(図1(A))と共に、切断された両側端部Bを不図示の搬送手段により第1のゴム押出機32の上流側に連続的に戻してゴム材料として用いる。
また、第1~第3の工程において制御手段56による第1の一対の圧延ロール36、36間のギャップ制御がなされる。
積層体A5は、不図示の巻き取り装置によって巻き取られる。
すなわち、積層体A5は、ベルト芯体12と、第1のカバーゴム14Aと、第2のカバーゴム14Bと、耳ゴム16とで構成されたコンベヤベルト10である。
その場合、上述した4)コンベヤベルト10の製造は、以下の通りである。
上述のように製造された第1の中間積層体A3の原反を用意する。
第1のゴム押出機32から押し出されたゴム材料を第1の一対の圧延ロール36、36で圧延して第1のシート状部材S1としての第1のカバーゴム14Aを形成する(第1の工程)。
次に、第1のシート状部材S1と、第2のシート状部材S2としての第1の中間積層体A3とを重ね合わせて第2の一対の圧延ロール38、38で圧延することで第1のシート状部材S1と第2のシート状部材S2とが積層された積層体を連続的に製造する(第2の工程)。
また、第2の工程において、第2の一対の圧延ロール38、38から送り出される積層体の幅方向の両側端部Bを切断手段44のカッターにより切断すると共に、切断された両側端部Bを第1のゴム押出機32の上流側に連続的に戻してゴム材料として用いる。
また、第1、第2の工程において制御手段56による第1の一対の圧延ロール36、36間のギャップ制御がなされる。
積層体は、不図示の巻き取り装置によって巻き取られる。
すなわち、積層体は、ベルト芯体12と、第1のカバーゴム14Aと、第2のカバーゴム14Bとで構成されたコンベヤベルト10である。
したがって、積層体の厚さが目標値と合致するように、第2のシート状部材S2の厚さのばらつきに応じて第1のシート状部材S1の厚さを調整することができるので、第1のシート状部材S1と第2のシート状部材S2とが積層された積層体の厚さのばらつきを低減する上で有利となる。
そのため、積層体の厚さが大きすぎる場合に発生する加硫工程での積層体の表面の故障を低減でき、また、積層体の厚さが大きすぎる場合の材料の無駄を抑制する上でも有利となる。
したがって、第1のシート状部材S1と第2のシート状部材S2とが熱間で貼り合わせられることになるため、第1のシート状部材S1と第2のシート状部材S2との双方あるいは一方がタック(粘着性)の低い材料であったとしても、溶剤などを用いることなくこれらシート状部材S1、S2を確実に貼りあわせて積層することができ、積層体の品質を高める上で有利となる。
したがって、耳ゴム16と第2のシート状部材S2とが熱間で貼り合わせられることになるため、耳ゴム16と第2のシート状部材S2との双方あるいは一方がタック(粘着性)の低い材料であったとしても、溶剤などを用いることなくこれら耳ゴム16と第2のシート状部材S2を確実に貼りあわせて積層することができ、積層体の品質を高める上で有利となる。
したがって、ベルト芯体12の幅方向の両側の端面1210と耳ゴム16との間に隙間が形成されることなく耳ゴム16を第2のカバーゴム14B上に積層することができ、コンベヤベルト10の品質を高める上で有利となる。
したがって、切断された両側端部Bを一旦貯めておくスペースが不要となることは無論のこと、一定量の両側端部Bが貯まる毎に、積層体を製造する工程から離れた工程、例えば、ゴム材料を混合する工程に一定量の両側端部Bを運搬するといった手間が掛からず、省スペース化、製造工程の合理化を図る上で有利となる。
したがって、ベルト芯体12の中間製品の製造装置、ベルト芯体単体12Aの製造装置、第1の中間積層体A3の製造装置、コンベヤベルト10の製造装置をそれぞれ独立して設けて製造ラインを構成する場合に比較して、製造装置の台数を大幅に削減できるため省スペース化、設備の合理化を図る上で極めて有利となり、また、各製造装置毎に作業者を配置する必要がないため、省人化を図る上でも有利となる。
Claims (8)
- 第1のゴム押出機から押し出されたゴム材料を第1の一対の圧延ロールで圧延して第1のシート状部材を形成する第1の工程と、
前記第1のシート状部材と、原反から供給される第2のシート状部材とを重ね合わせて第2の一対の圧延ロールで圧延することで前記第1のシート状部材と前記第2のシート状部材とが積層された積層体を連続的に製造する第2の工程と、
を有する積層体の製造方法であって、
前記第1の一対の圧延ロールで圧延された前記第1のシート状部材の厚さd1の検出結果と、前記原反から供給される前記第2のシート状部材の厚さd2の検出結果と、前記積層体の厚さd3の検出結果とに基いて前記第1の一対の圧延ロール間のギャップを制御する、
ことを特徴とする積層体の製造方法。 - 前記積層体は、ベルト芯体と、前記ベルト芯体の一方の面に積層された第1のカバーゴムと、前記ベルト芯体の他方の面に積層された第2のカバーゴムとを含んで構成されたコンベヤベルトであり、
前記第1のシート状部材は、前記第1のカバーゴムであり、
前記第2のシート状部材は、前記ベルト芯体と前記第2のカバーゴムとが積層された第1の中間積層体である、
ことを特徴とする請求項1記載の積層体の製造方法。 - 前記積層体は、さらに、前記第1のカバーゴムと前記第2のカバーゴムとの間で前記ベルト芯体の幅方向の両側部にそれぞれ配置された耳ゴムを備え、
前記第2の工程の前に、第2のゴム押出機から押し出された前記耳ゴムを、前記第2のシート状部材の前記ベルト芯体の幅方向の両側部で前記第2のカバーゴム上に、第3の一対の圧延ロールで圧延することで積層させた第2の中間積層体を形成する第3の工程が行なわれ、
前記第2の工程では、前記第2のシート状部材を含む前記第2の中間積層体と前記第1のシート状部材とが積層される、
ことを特徴とする請求項2記載の積層体の製造方法。 - 前記第2のシート状部材は、前記ベルト芯体の幅が前記第2のカバーゴムの幅よりも小さく、前記第2のカバーゴムのうち前記ベルト芯体が積層された面の幅方向の両側に前記耳ゴムの幅に対応した寸法で前記ベルト芯体が位置しない帯状の耳ゴム載置面がそれぞれ形成されており、
前記第2のシート状部材の前記耳ゴム載置面に対して、前記第2のゴム押出機から押し出される前記耳ゴムの前記第2のカバーゴムの幅方向における位置決めを行なう位置決め手段が設けられ、
前記第3の一対の圧延ロールで圧延される直前の前記ベルト芯体の幅方向の両側の端面の位置P1の検出結果と、前記第3の一対の圧延ロールで圧延される直前の前記耳ゴムの幅方向の位置P2の検出結果とに基いて前記位置決め手段による前記耳ゴムの位置決めの制御を行なう、
ことを特徴とする請求項3記載の積層体の製造方法。 - 前記第2の工程において、前記第2の一対の圧延ロールから送り出される前記積層体の幅方向の両側端部を切断すると共に、前記切断された両側端部を前記第1のゴム押出機の上流側に連続的に戻して前記ゴム材料として用いる、
ことを特徴とする請求項1~4に何れか1項記載の積層体の製造方法。 - 前記積層体は、繊維補強層と、前記繊維補強層の一方の面に積層される第1のコートゴムとを含んで構成されコンベヤベルトのベルト芯体の厚さ方向の一部を構成しており、
前記第1のシート状部材は、前記第1のコートゴムであり、
前記第2のシート状部材は、前記繊維補強層である、
ことを特徴とする請求項1記載の積層体の製造方法。 - 前記積層体は、繊維補強層と、前記繊維補強層の一方の面に積層される第1のコートゴムと、前記芯体の他方の面に積層される第2のコートゴムとを含んで構成されるコンベヤベルトのベルト芯体単体であり、
前記第1のシート状部材は、前記第2のコートゴムであり、
前記第2のシート状部材は、前記繊維補強層と前記第1のコートゴムである、
ことを特徴とする請求項1記載の積層体の製造方法。 - 前記積層体は、ベルト芯体と、前記ベルト芯体に積層されたカバーゴムとを含んで構成されコンベヤベルトの厚さ方向の一部を構成する第1の中間積層体であり、
前記第1のシート状部材は、前記カバーゴムであり、
前記第2のシート状部材は、前記ベルト芯体である、
ことを特徴とする請求項1記載の積層体の製造方法。
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| CN201480006630.8A CN104995006B (zh) | 2013-02-22 | 2014-01-30 | 层合体的制造方法 |
| AU2014220162A AU2014220162B2 (en) | 2013-02-22 | 2014-01-30 | Method for producing laminate |
| US14/769,793 US9486959B2 (en) | 2013-02-22 | 2014-01-30 | Method for producing laminate |
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| JP2013033056A JP5920241B2 (ja) | 2013-02-22 | 2013-02-22 | 積層体の製造方法 |
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| CN (1) | CN104995006B (ja) |
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Also Published As
| Publication number | Publication date |
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| TW201441024A (zh) | 2014-11-01 |
| TWI579136B (zh) | 2017-04-21 |
| JP5920241B2 (ja) | 2016-05-18 |
| US9486959B2 (en) | 2016-11-08 |
| AU2014220162A1 (en) | 2015-09-17 |
| US20160001502A1 (en) | 2016-01-07 |
| CN104995006A (zh) | 2015-10-21 |
| JP2014162030A (ja) | 2014-09-08 |
| AU2014220162B2 (en) | 2015-11-26 |
| CN104995006B (zh) | 2018-03-02 |
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