WO2022224367A1

WO2022224367A1 - Elastic sheet punching device and elastic sheet punching system

Info

Publication number: WO2022224367A1
Application number: PCT/JP2021/016117
Authority: WO
Inventors: 健太郎坂本; 健二青木
Original assignee: エア・ウォーター・マッハ株式会社
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-10-27
Also published as: JP7026862B1; JPWO2022224367A1; CN115581119A

Abstract

This elastic sheet punching device (1) causes a first punch plate (13) to approach a first die plate (18) when an elastic sheet (2) is disposed on the first die plate (18), clamps the elastic sheet (2) between a first stripper plate (15) and the first die plate (18), and then punches the elastic sheet (2) with punch units (12) that protrude from the first stripper plate (15). A stripper plate surface (15a) and a first die plate surface (18a) are provided with stripper plate side recess sections (27) and die plate side recess sections (28) that divide a space (29) of a transferred shape in which the shape of the elastic sheet 2 is transferred when the surfaces are brought into contact.

Description

Elastic sheet punching device and elastic sheet punching system

The present invention relates to an elastic sheet punching device that punches an elastic sheet arranged on a die plate with a punch of a punch plate. The present invention also relates to an elastic sheet punching system for punching an elastic sheet with an elastic sheet punching device to manufacture an annular sealing material.

Patent Document 1 describes a punching device that punches a plate-shaped workpiece with a punch to manufacture a product. The punching device of the document includes a punch member having a punch portion, a stripper plate provided with a through hole through which the punch portion can pass in the vertical direction, and supported by the punch member in a vertically movable state, and a stripper plate. an urging member that urges the lower end position of the movement range. Further, the punching device has a die that is positioned below the stripper plate and has a hole capable of receiving the tip portion of the punch at a position overlapping the punch when viewed from above and below. The surface of the stripper plate and the surface of the die facing each other in the vertical direction are flat surfaces.

When the workpiece is placed on the surface of the die, the punching device performs a punching operation in which the punch member approaches the die from above. This first clamps the workpiece between the stripper plate and the die. Further, when the punch member approaches the die, the punch portion protruding downward from the stripper plate punches the workpiece on the die, and the tip portion of the punch portion is inserted into the hole. After that, the punch member moves upward from the die and returns to its original standby position. According to the punching device of the document, the workpiece is punched while being clamped by the stripper plate and the die. Therefore, the workpiece does not move on the die during punching.

Japanese Patent Application Laid-Open No. 58-25946

　Annular sealing materials such as O-rings are manufactured by punching elastomer elastic sheets. Here, when the above punching device is used for punching the elastic sheet, the elastic sheet is crushed and deformed when sandwiched between the stripper plate and the die. If the elastic sheet is deformed before punching, there is a problem that the punch part contacts a part different from the part to be punched and damages this part.

In addition, when the elastic sheet is punched by the punching device, the elastic sheet sticks to the punch portion at the time of punching, and after punching, the punch portion pulls the peripheral portion of the elastic sheet to be punched into the hole. Sometimes. In this case, the peripheral portion of the punched portion of the elastic sheet deforms and enters the gap between the punched portion and the inner peripheral wall surface of the hole portion. Therefore, a scratch or the like may be formed in the peripheral portion of the punched portion. In addition, when the elastic sheet is drawn into the hole more, the deformation of the elastic sheet increases, so that the periphery of the part to be punched may be broken.

In view of these points, an object of the present invention is to provide an elastic sheet punching device that can prevent or suppress deformation of the elastic sheet before and after punching. Another object of the present invention is to provide an elastic sheet punching system having such an elastic sheet punching device.

In order to solve the above problems, the present invention provides a punch plate comprising a plate portion and a punch portion protruding downward from the plate portion, a through hole through which the punch portion can pass in the vertical direction, a stripper plate movably supported by the plate portion; a biasing member that biases the stripper plate to a lower end position of the lower end of the range of movement thereof; a die plate having a hole capable of receiving the tip portion of the punch at a position overlapping the punch when viewed from above, and when the elastic sheet to be punched is placed on the die plate, the punch plate After approaching the die plate from above and sandwiching the elastic sheet between the stripper plate and the die plate, the elastic sheet is punched out by the punch portion projecting downward from the stripper plate to the punch. In the elastic sheet punching device for inserting the leading end portion of the part into the hole, and then separating the punch plate and the stripper plate from the die plate upward, the stripper plate of the stripper plates facing each other in the vertical direction On the surface and the die plate surface of the die plate, a stripper plate side concave portion and a die plate defining a transfer shape space in which the shape of the elastic sheet is transferred when the stripper plate surface and the die plate surface are brought into contact with each other. A side recess is provided.

In the present invention, the stripper plate and the die plate, which sandwich the elastic sheet from above and below during punching, have a recess on the stripper plate side and a die plate side that divide the space of the transfer shape to which the shape of the elastic sheet is transferred when the stripper plate and the die plate are brought into contact with each other. A recess is provided. Therefore, when the elastic sheet is sandwiched between the stripper plate and the die plate, the elastic sheet is accommodated in the space to which its own shape is transferred. As a result, the elastic sheet can be prevented or suppressed from being crushed and deformed before punching. Therefore, it is possible to prevent or suppress contact of the first punch portion with a portion of the elastic sheet other than the portion to be punched.

Further, when the stripper plate surface and the die plate surface are brought into contact with each other, the elastic sheet fits into the stripper plate side concave portion having a transfer shape corresponding to the shape of the upper surface of the elastic sheet and corresponds to the shape of the lower surface of the elastic sheet. It fits into a die plate side recess provided with a transfer shape that fits. Therefore, the elastic sheet is restricted from deforming in the in-plane direction of the die plate surface in the space defined between the stripper plate and the die plate. Therefore, even if the elastic sheet sticks to the punch when the punch penetrates the elastic sheet, and the elastic sheet is pulled toward the hole when the punch enters the hole, the elastic sheet does not stick to the hole. It is possible to prevent or suppress being drawn in. That is, after the elastic sheet is punched, deformation of the elastic sheet is prevented or suppressed.

In the present invention, the die plate includes a die plate body made entirely of metal, and a coating layer containing a fluorine resin provided on the surface of the die plate body, and the die plate surface and the die plate side concave portion The inner surface and the inner peripheral wall surface positioned radially outward of the punch when the punch is inserted into the hole may be covered with the coating layer. If the inner peripheral wall surface of the hole is covered with a fluororesin-containing coating layer, it becomes more slippery than when the inner peripheral wall surface of the hole is a metal surface. Therefore, when the punch pulls the elastic sheet into the hole during punching, the elastic sheet slides on the inner wall surface of the hole. As a result, it is possible to prevent or suppress a reduction in the speed at which the punch section punches the elastic sheet. Therefore, the elastic sheet can be punched out with high accuracy by the punch portion. In addition, if the die plate surface and the inner surface of the die plate side recess are covered with a coating layer containing a fluororesin, these surfaces are more slippery than metal surfaces. Therefore, when the elastic sheet is placed in the die plate-side recess, if the elastic sheet and the die plate-side recess are misaligned in the in-plane direction of the die plate surface, the elastic sheet will not move between the die plate surface and the die plate-side recess. It is set in such a state that it slides on the inner surface and its lower surface fits into the die plate side concave portion. This allows the elastic sheet to be accurately placed at a predetermined position on the die plate. Therefore, when the elastic sheet is sandwiched between the die plate and the stripper plate, the elastic sheet will not be crushed. Moreover, since the elastic sheet is accurately arranged at a predetermined position on the die plate, the elastic sheet can be accurately punched by the punch section.

In the present invention, the die plate includes a resin die plate body and a metal support plate that supports the die plate body from below. The inner surface and the inner peripheral wall surface positioned radially outward of the punch when the punch is inserted into the hole may be provided in the die plate main body. If the inner peripheral wall surface of the hole is provided in the die plate main body made of resin, it becomes easier to slip than when the inner peripheral wall surface of the hole is a metal surface. Therefore, when the punch pulls the elastic sheet into the hole during punching, the elastic sheet slides on the inner wall surface of the hole. As a result, it is possible to prevent or suppress a reduction in the speed at which the punch section punches the elastic sheet. Therefore, the elastic sheet can be punched out with high accuracy by the punch portion. In addition, if the die plate surface and the inner surface of the die plate side concave portion are provided on the die plate main body portion made of resin, these surfaces become more slippery than when these surfaces are metal surfaces. Therefore, when the elastic sheet is placed in the die plate-side recess, if the elastic sheet and the die plate-side recess are misaligned in the in-plane direction of the die plate surface, the elastic sheet will not move between the die plate surface and the die plate-side recess. It is set in such a state that it slides on the inner surface and its lower surface fits into the die plate side concave portion. This allows the elastic sheet to be accurately placed at a predetermined position on the die plate. Therefore, when the elastic sheet is sandwiched between the die plate and the stripper plate, the elastic sheet will not be crushed. Moreover, since the elastic sheet is accurately arranged at a predetermined position on the die plate, the elastic sheet can be accurately punched by the punch section.

In the present invention, the die plate surface and the inner surface of the die plate side concave portion are rough surfaces, and preferably satisfy the following conditional expression, where D is the ten-point average roughness.
5μm≦D≦20μm
If such a conditional expression is satisfied, the contact area between the die plate surface and the inner surface of the die plate side concave portion and the elastic sheet is reduced. Here, if the ten-point average roughness D of each surface is less than the lower limit value of the conditional expression, the elastic sheet tends to stick to the die plate. There may be obstacles. Further, when the ten-point average roughness D of each surface exceeds the upper limit value of the conditional expression, the unevenness of each surface may damage the elastic sheet.

In the present invention, the tip portion of the punch portion includes a punching portion and a column portion in order from the tip toward the top, and when viewed from the top and bottom direction, the column portion is the punching portion. may be located inside the As a result, when the tip of the punch is inserted into the hole of the die plate, a gap is formed between the column and the inner peripheral wall surface of the hole. Therefore, even if the punch pulls the elastic sheet into the hole when the tip of the punch enters the hole, the elastic sheet and the column are in close contact with each other, and the punch pushes the elastic sheet into the hole. can be prevented from being pulled deep into the Therefore, breakage of the elastic sheet can be prevented or suppressed.

In the present invention, it is desirable that the tip surface of the punch portion is a rough surface. By doing so, it is possible to reduce the area of contact between the tip surface of the punch and the elastic sheet. Therefore, the punched part of the elastic sheet punched by the punch part sticks to the tip surface of the punch part and does not come off, and the punched part can be prevented from moving upward together with the punch plate after punching.

In the present invention, the punch part can be made of resin. In this way, it is easier to make the punch part slippery than when the punch part is made of metal. Therefore, it is easy to suppress the punch portion from pulling the elastic sheet into the hole portion.

In the present invention, the punch portion has a central protruding portion in the center of the tip end face that protrudes downward from the outer peripheral edge of the tip end face, and the tip of the central protruding portion is perpendicular to the axis of the punch portion. It can be planar. With this configuration, when the punch portion contacts the punching target portion of the elastic sheet, the flat surface of the tip of the central projecting portion pushes the punching target portion of the elastic sheet to elastically deform it. Therefore, after being punched by the punch part, the punched portion of the elastic sheet returns to its original shape due to its own elastic restoring force. As a result, the punched portion of the elastic sheet can be easily separated from the tip surface of the punch portion. Therefore, the punched portion of the elastic sheet does not stick to the punch portion and fall off, and the punched portion can be prevented from moving upward together with the punch plate after punching.

In the present invention, the punch plate is moved up and down between a standby position where the stripper plate is separated upward from the surface of the die plate and a punching completion position where the tip of the punch is inserted into the hole. and a punching control section for driving and controlling the lifting mechanism, wherein the punching control section moves the punch plate from the standby position to the punching completion position at a speed higher than a first speed. A second speed for returning the plate from the punching completion position to the standby position can be slowed down. In this way, after the elastic sheet is punched out, the stripper plate moves at a slower speed when it separates upward from the elastic sheet. Therefore, it is possible to prevent or suppress the elastic sheet from being pulled by the stripper plate spaced upward from the die plate. Therefore, it is possible to prevent or suppress the movement of the elastic sheet on the first die plate.

In the present invention, it is desirable that the surface of the stripper plate and the inner surface of the recess on the side of the stripper plate are rough surfaces. In this way, the contact area between the elastic sheet and the stripper plate can be reduced. Therefore, it is possible to prevent or suppress sticking of the elastic sheet to the stripper plate when the stripper plate is separated upward from the die plate.

In the present invention, a recovery mechanism for recovering the punched portion punched from the elastic sheet is provided, and the recovery mechanism includes a recovery box arranged below the die plate and communicating with the hole, and a recovery box communicating with the recovery box. An intake mechanism having an intake port, and an intake mechanism control section for driving and controlling the intake mechanism, wherein the intake mechanism control section controls the intake mechanism while the stripper plate is in contact with the die plate. can be driven. With this configuration, when the punch punches the elastic sheet, an air current directed toward the collection box is generated between the radially outer surface of the tip portion of the punch and the inner peripheral wall surface of the hole. Occur. As a result, it is possible to prevent or suppress the fact that the punched part of the elastic sheet punched by the punch part sticks to the punch part and does not come off. In addition, the airflow directed toward the collection box makes it easy to collect the punched parts dropped from the punching section into the collection box.

In the present invention, it is desirable to have an elastic sheet removing mechanism for blowing off the elastic sheet arranged in the die plate side concave portion from the die plate. In this way, the elastic sheet placed in the die plate side recess can be removed from the die plate without being moved on the die plate surface after punching is completed.

In the present invention, the elastic sheet may be made of elastomer.

Next, the elastic sheet punching system of the present invention includes the above elastic sheet punching device and an elastic sheet conveying the elastic sheet from the retention position where the elastic sheet is retained to the die plate side concave portion of the elastic sheet punching device. and a conveying device, wherein the staying position is set in a temperature bath having a temperature control mechanism for adjusting the temperature inside the bath.

The elastic sheet has a higher coefficient of linear expansion than iron and aluminum, and its dimensions change greatly with temperature. Therefore, depending on the temperature of the environment in which the elastic sheet punching device is installed, the dimensions of the elastic sheet may vary from the design dimensions. Here, in order to fit the elastic sheet into the die plate side concave portion, it is desirable to match the elastic sheet with the design dimensions before the elastic sheet is supplied to the elastic sheet punching device. On the other hand, in the elastic sheet punching system of the present invention, the elastic sheet stays at the staying position set in the temperature bath having the temperature control mechanism before being supplied to the elastic sheet punching device. Therefore, by adjusting the temperature in the bath, the elastic sheet can be matched to the design dimensions.

In another aspect of the present invention, an elastic sheet punching system has a first elastic sheet punching device and a second elastic sheet punching device as the elastic sheet punching devices, and the elastic sheet at a predetermined supply position. to the die plate side concave portion of the first die plate, which is the die plate of the first elastic sheet punching device; a second elastic sheet conveying device that moves to the die plate side concave portion of the second die plate that is the die plate of the sheet punching device, and a first punch that is the punch section of the first elastic sheet punching device. and the second punch portion, which is the punch portion of the second elastic sheet punching device, have different contour shapes when viewed in the vertical direction, and the elastic sheet becomes an annular sealing material by punching. The first elastic sheet punching device includes an annular product portion and a burr portion excluding the annular product portion, and the first elastic sheet punching device punches an inner burr portion inside the annular product portion of the burr portion with the first punch portion. The second elastic sheet punching device is characterized in that the second punch section punches the annular product section.

In the elastic sheet punching system of the present invention, when manufacturing the annular sealing material, first, the inner burrs of the elastic sheet are punched out by the first elastic sheet punching device. Next, the elastic sheet is conveyed from the first elastic sheet punching device to the second elastic sheet punching device. Thereafter, the annular product portion of the elastic sheet is punched by the second elastic sheet punching mechanism. According to the present invention, deformation of the elastic sheet can be prevented or suppressed before and after punching in the first elastic sheet punching device. Therefore, when the inner burr portion is punched out by the first elastic sheet punching device, the first punch portion may come into contact with the annular product portion located on the outer peripheral side of the inner burr portion and damage the annular product portion. prevented or suppressed. Further, it is possible to prevent or suppress the formation of scratches and breakage of the annular product portion due to the first punch portion pulling the annular product portion toward the hole portion. Therefore, it is possible to prevent or suppress the occurrence of damage to the annular product portion, which serves as the sealing material, when the annular product portion is manufactured by two punching operations using two elastic sheet punching devices. Further, in the second elastic sheet punching device, deformation of the elastic sheet during punching is prevented or suppressed. Therefore, the second elastic sheet punching device can accurately punch out the annular product portion that serves as the sealing material.

In the present invention, the first elastic sheet conveying device includes a first suction section having a first suction surface and a first suction port provided on the first suction surface, and a first suction port communicating with the first suction port. a mechanism, a first suction portion moving mechanism for moving the first suction portion, and a first transport control portion for driving and controlling the first suction mechanism and the first suction portion moving mechanism, wherein the first transport The control unit causes the first suction surface to face the elastic sheet at the predetermined supply position with a gap, and drives the first intake mechanism to attract the elastic sheet to the first suction surface. , the first suction mechanism may be stopped by moving the first suction portion to dispose the first suction surface above the die plate side concave portion of the first die plate.

With this configuration, the first adsorption section separates the first adsorption surface from the elastic sheet instead of adsorbing the elastic sheet to the first adsorption surface while pressing the first adsorption surface against the elastic sheet. In this state, the elastic sheet at the supply position is sucked upward and sucked onto the first suction surface. Therefore, when the elastic sheet is attracted to the first attraction surface, the first attraction surface is not pressed against the elastic sheet. Therefore, deformation of the elastic sheet can be prevented. Also, it is possible to prevent the elastic sheet from sticking to the first adsorption surface. Furthermore, it is possible to prevent or suppress electrification of the elastic sheet due to friction. Therefore, it is possible to prevent the elastic sheet from sticking to the first attraction surface due to electrification. As a result, the elastic sheet can be easily separated from the first suction surface when the first intake mechanism is stopped, so that the elastic sheet can be easily arranged in the plate-side concave portion of the first die plate.

In the present invention, the burr portion includes a frame-shaped burr portion provided over the entire circumference along the outer peripheral edge of the elastic sheet, and the annular product portion is positioned on the inner peripheral side of the frame-shaped burr portion. The second elastic sheet conveying device includes: a second suction unit having a second suction surface and a second suction port provided on the second suction surface; and a second suction mechanism communicating with the second suction port. a second suction portion moving mechanism for moving the second suction portion; and a second transfer control portion for driving and controlling the second suction mechanism and the second suction portion moving mechanism, wherein the second transfer control portion The second suction surface is opposed to the elastic sheet arranged in the die plate side concave portion of the first die plate with a gap therebetween, and the second suction mechanism is driven to apply the elastic sheet to the second suction surface. sucking a sheet, moving the second suction portion to position the second suction surface above the die plate side recess of the second die plate, and thereafter stopping the second suction mechanism; The second suction port may be provided in a frame-shaped opposing region facing the frame-shaped burr portion on the second attracting surface.

With this configuration, the second suction part does not attract the elastic sheet to the second suction surface while the second suction surface is pressed against the elastic sheet, but separates the second suction surface from the elastic sheet. In this state, the elastic sheet in the die plate concave portion of the first die plate is sucked upward to be sucked to the second sucking surface. Therefore, when the elastic sheet is attracted to the second attraction surface, the second attraction surface is not pressed against the elastic sheet. Therefore, deformation of the elastic sheet can be prevented. Also, it is possible to prevent the elastic sheet from sticking to the second adsorption surface. Furthermore, it is possible to prevent or suppress electrification of the elastic sheet due to friction. Therefore, it is possible to prevent the elastic sheet from sticking to the second attraction surface due to electrification. As a result, the elastic sheet can be easily separated from the second suction surface when the second suction mechanism is stopped, so that the elastic sheet can be easily arranged in the plate-side concave portion of the second die plate. Further, in the second elastic sheet conveying device, the second intake port is provided in a facing area facing the frame-shaped burr portion of the elastic sheet on the second attracting surface. As a result, the second suction section can suction the outer peripheral portion of the elastic sheet to the second suction surface over the entire circumference. Therefore, even if a hole punched by the first elastic sheet punching device is formed on the inner peripheral side of the frame-shaped burr portion of the elastic sheet, the second suction section can suck the elastic sheet. Further, if the second suction portion sucks the outer peripheral portion of the elastic sheet over the entire circumference, it is possible to prevent or suppress the elastic sheet from being bent. Therefore, the elastic sheet can be accurately arranged in the plate-side concave portion of the second die plate.

According to the present invention, when the elastic sheet is sandwiched between the die plate and the stripper plate during punching, it is accommodated in the space to which its shape is transferred. Therefore, it is possible to prevent or suppress the elastic sheet from being crushed and deformed before punching. Further, the elastic sheet is accommodated in the space to which its own shape is transferred, so that deformation in the in-plane direction of the die plate surface is regulated or suppressed. Therefore, even if the punch pulls the elastic sheet toward the hole during punching, it is possible to prevent or suppress the elastic sheet from being pulled toward the hole after punching. Therefore, deformation of the elastic sheet is prevented or suppressed after the elastic sheet is punched.

Further, according to the elastic sheet punching system of the present invention, in the first punching device, it is possible to prevent or suppress the occurrence of scratches on the annular product portion positioned around the punched portion. In addition, the second punching device can punch out the annular product portion with high accuracy.

1 is a front view of an elastic sheet punching system; FIG. 1 is a plan view of an elastic sheet punching system viewed from above; FIG. 2A and 2B are a plan view and a cross-sectional view of an elastic sheet; FIG. It is an explanatory view of a first elastic sheet punching device. FIG. 4 is an explanatory view of the first elastic sheet punching device immediately before punching the elastic sheet; FIG. 4 is an explanatory view of the first elastic sheet punching device immediately after punching the elastic sheet; FIG. 4 is an explanatory diagram of a first punch section of the first elastic sheet punching device; FIG. 11 is an explanatory diagram of a second punch section of the second elastic sheet punching device; FIG. 4 is an explanatory diagram of a supply mechanism; FIG. 4 is an explanatory diagram of an elastic sheet moving mechanism and a conveying mechanism; FIG. 4 is a perspective view of a table and positioning mechanism; FIG. 5 is an explanatory diagram of a second elastic sheet conveying device; 4 is a flowchart of the operation of the elastic sheet punching system; It is explanatory drawing of the die plate of a modification. FIG. 11 is an explanatory diagram of a suction unit of Modification 1; FIG. 11 is an explanatory diagram of a suction unit of modification 2;

An elastic sheet punching system to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is a front view of an elastic sheet punching system. FIG. 2 is an illustration of a resilient sheet punching system viewed downward from a given height. FIG. 2 shows a downward view from the height of line JJ in FIG. FIG. 3(a) is a plan view of the elastic sheet. FIG. 3(b) is a sectional view taken along line KK of FIG. 3(a). In the elastic sheet punching system 1 of this example, an elastic sheet 2 is sequentially punched by two elastic

sheet punching devices

3 and 4 to manufacture an annular sealing material such as an O-ring.

As shown in FIG. 1, an elastic sheet punching system 1 includes a first elastic sheet punching device 3 for punching an elastic sheet 2, and a first elastic sheet punching device 3 for further punching the elastic sheet 2 punched by the first elastic sheet punching device 3. of second elastic sheet punching device 4. The elastic sheet punching system 1 also includes a first elastic sheet conveying device 5 that supplies the elastic sheet 2 to the first elastic sheet punching device 3, and a second elastic sheet punching device that transfers the elastic sheet 2 from the first elastic sheet punching device 3 to the second elastic sheet punching device. and a second elastic sheet conveying device 6 for conveying to 4 . Further, the elastic sheet punching system 1 includes a control unit 7 that drives the first elastic sheet punching device 3, the second elastic sheet punching device 4, the first elastic sheet conveying device 5, and the second elastic sheet conveying device 6 in cooperation. have.

The first elastic sheet punching device 3 and the second elastic sheet punching device 4 are arranged in one direction. Here, the arrangement direction of the first elastic sheet punching device 3 and the second elastic sheet punching device 4 is the X direction, the direction perpendicular to the X direction is the Y direction, and the direction perpendicular to the X and Y directions is the Z direction. . The Z direction is the vertical direction. In the X direction, the side where the second elastic sheet punching device 4 is located is the X1 direction, and the opposite side is the X2 direction. One side of the Y direction is the Y1 direction, and the other side is the Y2 direction. The downward direction is the Z1 direction, and the Z2 direction is the Z2 direction.

(elastic sheet)
As shown in FIG. 3, the elastic sheet 2 has a square profile when viewed in its thickness direction. The outline of the elastic sheet 2 consists of a first side 58a and a second side 58b extending parallel to each other and a third side 58c extending parallel to the direction orthogonal to the first side 58a and the second side 58b. and a fourth side 58d. Note that the elastic sheet 2 may have a hexagonal shape. In this case, the elastic sheet 2 has a first side 58a and a second side 58b extending parallel to and facing each other, and a third side extending parallel to and perpendicular to the first side 58a and the second side 58b facing each other. 58c and a fourth side 58d; a fifth side extending in a direction intersecting the first side 58a and the third side 58c to connect the first side 58a and the third side 58c; and a sixth side connecting the side 58b and the fourth side 58d.

In addition, the elastic sheet 2 includes a plurality of annular product portions 60 that serve as annular sealing materials, and a burr portion 61 excluding the plurality of annular product portions 60 . A plurality of annular product portions 60 are arranged in a matrix in the central portion of the elastic sheet 2 . Each annular product portion 60 has an annular shape when viewed from the thickness direction. A cross section obtained by cutting a portion of each annular product portion 60 in the circumferential direction in the thickness direction is circular.

The burr portion 61 has a frame-shaped burr portion 61a provided over the entire circumference along the outer peripheral edge of the elastic sheet 2 . The frame-shaped burr portion 61a is provided with a constant width. The plurality of annular product portions 60 are positioned on the inner peripheral side of the frame-shaped burr portion 61a. In addition, the burr portion 61 includes an inner burr portion 61b located inside each annular product portion 60 and an outer burr portion 61c located outside each annular product portion 60 on the inner peripheral side of the frame-shaped burr portion 61a. Prepare. The inner burr portion 61b has an annular inner projection projecting in the Z1 direction and the Z2 direction at a position adjacent to the annular product portion 60. As shown in FIG. The cross-sectional shape of the inner protrusion is rectangular and tapers in the Z1 and Z2 directions. The outer burr portion 61c continues on the inner peripheral side of the frame-shaped burr portion 61a and continues to the frame-shaped burr portion 61a. The outer burr portion 61c has an annular outer projection projecting in the Z1 direction and the Z2 direction at a position adjacent to the annular product portion 60. As shown in FIG. The cross-sectional shape of the outer protrusion is rectangular and tapers in the Z1 and Z2 directions.

Here, the first elastic sheet punching device 3 punches out the inner burr portion 61b from the elastic sheet 2 . The second elastic sheet punching device 4 punches out the annular product portion 60 from the elastic sheet 2 punched with the inner burr portion 61b. The annular product portion 60 punched by the second elastic sheet punching device 4 becomes an annular sealing material. In this example, the sealing material is an O-ring.

The elastic sheet 2 is made of elastomer. In this example, the elastic sheet 2 is made of thermosetting elastomer. Thermoset elastomers are elastic and flexible. Thermosetting elastomers are also tacky. A thermosetting elastomer has a linear expansion coefficient of 1×10 ^-4 /°C to 3×10 ^-4 /°C. The coefficient of linear expansion of thermosetting elastomers is 10 to 40 times greater than that of iron. Here, the elastic sheet 2 is manufactured by a rubber injection molding machine. That is, the elastic sheet 2 is molded by injecting a thermosetting elastomer into a mold at a predetermined molding temperature and applying pressure. The elastic sheet 2 has properties similar to those of a thermosetting elastomer. That is, the elastic sheet 2 has elasticity and adhesiveness. Also, the elastic sheet 2 has a coefficient of linear expansion 10 to 40 times greater than that of iron.

(First elastic sheet punching device)
FIG. 4 is an explanatory diagram of the first elastic sheet punching device 3. As shown in FIG. In Figure 4, the punch plate is in the standby position. FIG. 5 is an explanatory diagram of the first elastic sheet punching device 3 immediately before punching the elastic sheet. FIG. 6 is an explanatory view of the first elastic sheet punching device 3 immediately after the elastic sheet is punched by the first punch section. FIG. 7 is an explanatory diagram of the first punch portion.

As shown in FIG. 4, the first elastic sheet punching device 3 has a first punch plate 13 having a first plate portion 11 and a first punch portion 12 projecting from the first plate portion 11 in the Z1 direction. . The first elastic sheet punching device 3 also has a first stripper plate 15 supported by the first plate portion 11 so as to be movable in the Z direction. The first stripper plate 15 has a first through hole 16 through which the first punch part 12 can pass in the Z direction. The first stripper plate 15 moves between a lower end position 15A located at the end of its movement range in the Z1 direction and an upper position 15B (see FIGS. 5 and 6) closer to the first plate portion 11 than the lower end position 15A. Moving. Further, the first elastic sheet punching device 3 has a first biasing member 17 that biases the first stripper plate 15 toward the lower end position 15A.

The first elastic sheet punching device 3 also has a first die plate 18 located in the Z1 direction of the first stripper plate 15 . As shown in FIG. 2, the first die plate 18 has a first hole portion 19 capable of receiving the tip portion 14 of the first punch portion 12 at a position overlapping the first punch portion 12 when viewed in the Z direction. Prepare.

Furthermore, the first elastic sheet punching device 3 has a first elevating mechanism 21 for elevating the first punch plate 13, as shown in FIG. The first elevating mechanism 21 moves the first punch plate 13 to a standby position 13A where the first stripper plate 15 is separated from the die plate surface 18a in the Z2 direction, is moved up and down between the punching completion position 13B inserted in the . The state shown in FIG. 4 is the state in which the first punch plate 13 is arranged at the standby position 13A, and the state shown in FIG. 6 is the state in which the first punch plate 13 is arranged at the punching completion position 13B.

The first punch part 12 punches out the inner burr part 61b from the elastic sheet 2. As shown in FIG. 4, the first punch portion 12 protrudes from the first plate portion 11 in the Z1 direction. As shown in FIG. 7, the tip portion 14 of the first punch portion 12, which enters the first hole portion 19 of the first die plate 18 when punching the elastic sheet 2, is sequentially formed from the tip in the Z2 direction. A punched portion 25 and a column portion 26 are provided. The punched portion 25 and the post portion 26 are circular when viewed in the Z direction. The column portion 26 is located inside the punched portion 25 when viewed in the Z direction. In this example, the column portion 26 and the punched portion 25 are coaxial, and the column portion 26 has a smaller outer diameter than the punched portion 25 .

The tip end surface 12a of the first punch portion 12, that is, the tip end surface 12a of the punching portion 25, has an annular protruding portion 25a protruding in the Z1 direction on the outer peripheral edge. Further, the tip surface 12a of the punched portion 25 has a central protruding portion 25b protruding in the Z1 direction at the central portion. The central protruding portion 25b has a frusto-conical shape. The tip of the central projecting portion 25b is a plane perpendicular to the axis of the first punch portion 12 extending in the Z direction. The annular projecting portion 25a and the central projecting portion 25b are radially spaced apart. An annular depression is formed between the annular projecting portion 25a and the central projecting portion 25b in the radial direction. The central protruding portion 25b protrudes in the Z1 direction more than the annular protruding portion 25a.

In this example, the first punch portion 12 is made of a conductive metal. The entire surface of the tip portion 14 of the first punch portion 12 is subjected to blasting. As a result, the tip surface 12a of the first punch portion 12 is roughened. The tip surface 12a of the first punch portion 12 satisfies the following conditional expression (1), where P is the ten-point average roughness.
5 µm ≤ P ≤ 20 µm (1)
Here, P more preferably satisfies the following conditional expression (2).
8 µm ≤ P ≤ 12 µm (2)
In this example, P=10 μm, satisfying conditional expressions (1) and (2).

Next, the first stripper plate 15 is made of a conductive metal. As shown in FIG. 4, when the punch plate 13 is arranged at the standby position 13A, the tip portions 14 of the first punch portions 12 are inserted into the first through holes 16 of the first stripper plate 15. there is The first biasing members 17 are four coil springs arranged between the four corners of the first plate portion 11 and the four corners of the first stripper plate 15 . As shown in FIG. 4, when the first stripper plate 15 is located at the lower end position 15A, the tip of the center protruding portion 25b of the tip surface 12a of the first punch portion 12 is positioned at the lower surface of the first stripper plate 15, which is the stripper plate. It protrudes in the Z1 direction from the surface 15a. Therefore, as shown in FIG. 5, when the stripper plate surface 15a comes into contact with the die plate 18, the tip of the central protruding portion 25b of the first punch portion 12 is pushed into the inner burr of the elastic sheet 2 located on the die plate 18. It contacts the portion 61b. As shown in FIG. 6, when the first stripper plate 15 is at the upper position 15B, the tip portion 14 of the first punch portion 12 protrudes in the Z1 direction from the stripper plate surface 15a.

Here, as shown in FIG. 4, the stripper plate side concave portion 27 is provided on the stripper plate surface 15a. The stripper plate surface 15a and the inner surface 27a of the stripper plate side recess 27 are rough surfaces. The stripper plate surface 15a and the inner surface 27a of the stripper plate side concave portion 27 satisfy the following conditional expression (3), where S is the ten-point average roughness.
5 μm≦S≦40 μm (3)
Here, it is more desirable for S to satisfy the following conditional expression (4).
8 μm≦S≦12 μm (4)
In this example, S=10 μm, satisfying conditional expressions (3) and (4).

The first die plate 18 has a die plate side concave portion 28 on a die plate surface 18a that is its upper surface. The die plate side concave portion 28 is formed at the first punching position A where the elastic sheet 2 to be punched is arranged. As shown in FIG. 5, when the stripper plate surface 15a and the die plate surface 18a are brought into contact with each other, the die plate side concave portion 28 and the stripper plate side concave portion 27 face each other. Further, between the first stripper plate 15 and the first die plate 18, a space 29 having a transfer shape obtained by transferring the shape of the elastic sheet 2 is defined by the die plate side recess 28 and the stripper plate side recess 27. .

Here, as shown in FIG. 4, the first die plate 18 includes a first die plate body 31 made of a conductive metal and a first coating containing fluorine resin provided on the surface of the first die plate body 31. a layer 32; The first coating layer 32 is a PTFE-containing nickel plating layer, a Teflon (registered trademark) coating layer, or the like. As a result, the die plate surface 18a, the inner surface 28a of the die plate side concave portion 28, and the inner peripheral wall surface 19a positioned radially outward of the tip portion 14 when the punch portion 12 is inserted into the

first hole portion

19, 1 coating layer 32 .

The die plate surface 18a and the inner surface 28a of the die plate side recess 28 are rough surfaces. That is, the surfaces of the first coating layer 32 on these sides are rough surfaces. The die plate surface 18a and the inner surface 28a of the die plate side concave portion 28 satisfy the following conditional expression (5), where D is the ten-point average roughness.
5 µm ≤ D ≤ 40 µm (5)
Here, D more preferably satisfies the following conditional expression (6).
8 µm ≤ D ≤ 12 µm (6)
In this example, D=10 μm, satisfying conditional expressions (5) and (6).

Next, the first elastic sheet punching device 3 has a first punching controller 22 that drives and controls the first elevating mechanism 21, as shown in FIG. The first punching control unit 22 drives the first lifting mechanism 21 to move the first punch plate 13 from the standby position 13A to the punching completion position 13B at a first speed V1 ( 4 and 5), the second speed V2 (see FIG. 6) for returning the first punch plate 13 from the punching completion position 13B to the standby position 13A is made slower.

In addition, the first elastic sheet punching device 3 has a first recovery mechanism 23 that recovers the inner burr portion 61b punched by the first punch section 12 . As shown in FIG. 4 , the first recovery mechanism 23 includes a first recovery box 24 arranged in the Z1 direction of the first die plate 18 and communicating with the first hole 19 , and a first recovery box 24 communicating with the first recovery box 24 . and a first intake mechanism 34 having an intake port 34a. Further, the first elastic sheet punching device 3 is provided with a first intake mechanism control section 35 that drives and controls the first intake mechanism 34, as shown in FIG. The first intake mechanism control section 35 drives the intake mechanism 34 while the first stripper plate 15 is in contact with the first die plate 18 .

Here, as shown in FIG. 1, the first elastic sheet punching device 3 includes a first control section 10 that controls the operation of the first elastic sheet punching device 3. The first control unit 10 is provided integrally with the control unit 7 of the elastic sheet punching system 1 or communicable with it. The first punching control section 22 and the first intake mechanism control section 35 of the first recovery mechanism 23 are provided in the first control section 10 .

As shown in FIG. 4 , when the elastic sheet 2 to be punched is placed on the first die plate 18 , the first punch control section 22 brings the first punch plate 13 closer to the first die plate 18 . As a result, the first elastic sheet punching device 3 brings the first stripper plate 15 and the first die plate 18 into contact with each other to sandwich the elastic sheet 2 therebetween (see FIG. 5). After that, when the first punch plate 13 further approaches the first die plate 18, the first elastic sheet punching device 3 punches the elastic sheet 2 with the first punch part 12 projecting from the first stripper plate 15 in the Z1 direction. Then, the tip portion 14 of the first punch portion 12 is inserted into the first hole portion 19 (see FIG. 6). After that, the first elastic sheet punching device 3 moves the first punch plate 13 in the Z2 direction. As a result, the first punch plate 13 and the first stripper plate 15 are separated from the first die plate 18 in the Z2 direction, resulting in the state shown in FIG. The inner burr portion 61 b punched by the first punching section 12 is recovered by the first recovery mechanism 23 .

(Second elastic sheet punching device)
FIG. 8 is an explanatory diagram of the shape of the tip portion 14 of the punch portion 12 of the second elastic sheet punching device 4. As shown in FIG. The second elastic sheet punching device 4 has a structure corresponding to that of the first elastic sheet punching device 3 . Therefore, in the description of the second elastic sheet punching device 4, the corresponding components corresponding to those of the second elastic sheet punching device 4 are denoted by the same reference numerals, and the description thereof will be omitted. 4, 5, and 6 are used in the explanation of the second elastic sheet punching device 4, as in the explanation of the first elastic sheet punching device 3. FIG.

As shown in FIG. 4, the second elastic sheet punching device 4 has a second punch plate 13 having a second plate portion 11 and a second punch portion 12 projecting from the second plate portion 11 in the Z1 direction. . The second elastic sheet punching device 4 also has a second stripper plate 15 supported by the second plate portion 11 so as to be movable in the Z direction. Further, the second elastic sheet punching device 4 has a second biasing member 17 that biases the second stripper plate 15 toward the lower end position 15A. The second biasing member 17 is four coil springs. The second elastic sheet punching device 4 also has a second die plate 18 located in the Z1 direction of the second stripper plate 15 . Further, the second elastic sheet punching device 4 has a first elevating mechanism 21 for elevating the first punch plate 13, as shown in FIG. The second elevating mechanism 21 moves the second punch plate 13 to a standby position 13A where the second stripper plate 15 is separated from the die plate surface 18a in the Z2 direction, is moved up and down between the punching completion position 13B inserted in the .

The second punch part 12 punches out the annular product part 60 from the elastic sheet 2 . As shown in FIG. 8, the second punch portion 12 has a cylindrical shape. The outer diameter dimension of the second punch part 12 is larger than the outer diameter dimension of the punched part 25 of the first punch part 12. The tip end surface 12a of the second punch part 12 is circular, and from the outer peripheral edge to the inner peripheral side. It is a tapered surface that inclines in the Z2 direction. The tip surface 12a is inclined 30 degrees toward the Z2 direction with respect to a plane perpendicular to the central axis of the punch. In this example, the second punch part 12 is made of a conductive metal. Further, the tip surface 12a of the second punch portion 12 is subjected to blasting. As a result, the tip surface 12a of the second punch portion 12 is roughened. The tip end surface 12a of the second punch portion 12 has P=10 μm, where P is the ten-point average roughness, and satisfies the above conditional expressions (1) and (2).

The second stripper plate 15 is made of conductive metal. The second stripper plate 15 also has a second through hole 16 through which the second punch part 12 can pass in the Z direction. The inner diameter of the second through hole 16 is larger than the inner diameter of the first through hole 16 of the first stripper plate 15 . The tip portion 14 of the second punch portion 12 is inserted into each of the second through holes 16 . When the second stripper plate 15 is at the upper position 15B, the tip portion 14 of the second punch portion 12 protrudes in the Z1 direction from the stripper plate surface 15a.

A stripper plate side recess 27 is provided on the stripper plate surface 15a. The stripper plate surface 15a and the inner surface 27a of the stripper plate side recess 27 are rough surfaces. When the ten-point average roughness of the stripper plate surface 15a and the inner surface 27a of the stripper plate side concave portion 27 is S, S=10 μm, which satisfies the above conditional expressions (3) and (4).

The second die plate 18 has a second hole portion 19 capable of receiving the second punch portion 12 on a die plate surface 18a which is the upper surface thereof. The inner diameter of the second hole 19 is larger than the inner diameter of the first hole 19 of the first die plate 18 . Similar to the first die plate 18 shown in FIG. 4, a die plate side concave portion 28 is provided at a second punching position B where the elastic sheet 2 to be punched is arranged on the die plate surface 18a. 5, when the stripper plate surface 15a of the first stripper plate 15 and the die plate surface 18a of the second die plate 18 are brought into contact with each other, the die plate side concave portion 28 and the stripper plate side concave portion 27 are formed. are opposed. Between the second stripper plate 15 and the second die plate 18, a space 29 having a transfer shape obtained by transferring the shape of the elastic sheet 2 is defined by the die plate side recess 28 and the stripper plate side recess 27. .

Here, the second die plate 18 includes a second die plate body 31 made of a conductive metal and a second coating layer 32 containing fluororesin provided on the surface of the second die plate body 31 . As a result, the die plate surface 18 a , the inner surface 28 a of the die plate side recess 28 , and the inner peripheral wall surface 19 a of the second hole 19 are covered with the second coating layer 32 . Also, the die plate surface 18a and the inner surface 28a of the die plate side recess 28 are rough surfaces. The die plate surface 18a and the inner surface 28a of the die plate side concave portion 28 have D=10 μm, where D is the ten-point average roughness, and satisfy the above conditional expressions (5) and (6). That is, the ten-point average roughness of the die plate surface 18a covered with the second coating layer 32 and the inner surface 28a of the die plate side recess 28 is 10 μm.

Next, as shown in FIG. 1, the second elastic sheet punching device 4 has a second punching controller 22 that drives and controls the second elevating mechanism 21 . When the second punching control unit 22 drives the second lifting mechanism 21 to raise and lower the second punch plate 13, the second punching control unit 22 moves the second punching plate 13 from the standby position 13A to the punching completion position 13B at a second speed V2 ( 4 and 5), the second speed V2 (see FIG. 6) for returning the second punch plate 13 from the punching completion position 13B to the standby position 13A is made slower.

The second elastic sheet punching device 4 also has a second collecting mechanism 23 for collecting the annular product portion 60 punched by the second punch portion 12 . As shown in FIG. 4 , the second recovery mechanism 23 includes a second recovery box 24 arranged in the Z1 direction of the second die plate 18 and communicating with the second hole 19 , and a second recovery box 24 communicating with the second recovery box 24 . and a second intake mechanism 34 having an intake port 34a. Further, as shown in FIG. 1 , the second recovery mechanism 23 includes a second intake mechanism control section 35 that drives and controls the second intake mechanism 34 . The second intake mechanism control section 35 drives the intake mechanism 34 while the second stripper plate 15 is in contact with the second die plate 18 .

Furthermore, as shown in FIG. 1, the second elastic sheet punching device 4 has an elastic sheet removing mechanism for blowing off the elastic sheet 2 arranged in the die plate side concave portion 28 of the second die plate 18 to the outside from the second die plate 18. 41. The elastic sheet removing mechanism 41 includes a plurality of nozzles 42 provided in the Z2 direction of the second die plate 18 and separated from the second die plate 18 in the X2 direction, and an air supply pump connected to the nozzles 42 . 43 and. The elastic sheet removing mechanism 41 also includes an elastic sheet removing mechanism control section 45 that drives and controls the air supply pump 43 .

The tip openings of the multiple nozzles 42 are directed to the end portion of the die plate side concave portion 28 in the X2 direction. When the punching of the elastic sheet 2 is completed and the second stripper plate 15 is separated from the second die plate 18 in the Z2 direction, the elastic sheet removing mechanism control unit 45 drives the air supply pump 43 to supply compressed air from the nozzle 42 . is expelled. As a result, compressed air is blown from the nozzle 42 toward the end portion of the die plate side recess 28 in the X2 direction from the oblique Z2 direction. As a result, the elastic sheet 2 arranged in the die plate side recessed portion 28 jumps out from the die plate side recessed portion 28 in the Z2 direction toward the X1 direction, and falls in the X1 direction of the second die plate 18 . A recovery box (not shown) is arranged in the X1 direction of the second die plate 18 to recover the elastic sheet 2 from which the annular product portion 60 has been punched.

Here, as shown in FIG. 1, the second elastic sheet punching device 4 includes a second control section 40 that controls the operation of the second elastic sheet punching device 4. The second control section 40 is provided integrally with or communicable with the control section 7 of the elastic sheet punching system 1 . The second punch control section 22 , the second intake mechanism control section 35 of the second collection mechanism 23 , and the elastic sheet removal mechanism control section 45 of the elastic sheet removal mechanism 41 are provided in the second control section 40 .

(First elastic sheet conveying device)
The first elastic sheet conveying device 5 includes a table 51 and a supply mechanism 52 that supplies the elastic sheet 2 to a placement area C set on the table surface 51 a of the table 51 . As shown in FIG. 2, the supply mechanism 52 includes a stocker 53 that holds the elastic sheets 2 in a stacked state at a retention position E set in advance. The supply mechanism 52 also includes an elastic sheet moving mechanism 54 that moves the elastic sheet 2 from the stocker 53 to the table 51 .

The first elastic sheet conveying device 5 also includes a positioning mechanism 55 that positions the elastic sheet 2 placed in the placement area C of the table surface 51a at the supply position D within the placement area C. Further, the first elastic sheet conveying device 5 attracts and moves the elastic sheet 2 positioned at the supply position D, and the conveying mechanism disposes the elastic sheet 2 at the first punching position A of the first elastic sheet punching device 3 by canceling the attraction. 56.

Here, the table 51 is positioned in the X2 direction of the first elastic sheet punching device 3. The table 51, the first elastic sheet punching device 3, and the second elastic sheet punching device 4 are arranged in a row in the X direction. The table 51 and the stocker 53 at the retention position E are arranged in the Y direction. The stocker 53 is positioned in the Y1 direction of the table 51 .

(supply mechanism)
9A and 9B are explanatory diagrams of the supply mechanism 52. FIG. FIG. 10A is a cross-sectional view of the suction portion of the elastic sheet moving mechanism 54. FIG. FIG. 10B is a perspective view of the suction portion of the elastic sheet moving mechanism 54 as viewed from the Z1 direction. FIG. 10A schematically shows a state in which the elastic sheet 2 is sucked by the suction portion. As shown in FIG. 9, in the stocker 53, the elastic sheets 2 are stacked in the Z direction. The elastic sheet moving mechanism 54 moves the uppermost elastic sheet 2 of the stocker 53 to the placement area C (see FIG. 2) set on the table surface 51a of the table 51. As shown in FIG.

As shown in FIG. 9 , the stocker 53 includes a square tubular portion 65 and a bottom plate portion 66 that closes the lower end opening of the square tubular portion 65 . The square tubular portion 65 includes slits 67 extending in the Z direction in the side plates facing each other in the X direction. The elastic sheet 2 is laminated inside the rectangular tubular portion 65 . The bottom plate portion 66 can be moved up and down inside the rectangular tubular portion 65 in the Z direction by a lifting mechanism 68 . The lifting mechanism 68 lifts the bottom plate portion 66 by a predetermined distance each time the elastic sheet moving mechanism 54 moves one elastic sheet 2 . The elastic sheet 2 is accommodated in the stocker 53 with the first side 58a and the second side 58b facing the X direction and the third side 58c and the fourth side 58d facing the Y direction. Here, as shown in FIG. 2, the residence position E is set in a temperature bath 70 having a temperature control mechanism 70a for controlling the temperature inside the bath. Therefore, the stocker 53 is positioned inside the temperature bath 70 . The elastic sheet 2 stays in the temperature bath 70 for a predetermined time or longer.

As shown in FIGS. 2 and 9, the elastic sheet moving mechanism 54 includes an adsorption portion 73 having an adsorption surface 71 and an intake port 72 provided in the adsorption surface 71; an intake mechanism 74 communicating with the intake port 72; and an adsorption portion moving mechanism 75 that moves the adsorption portion 73 and the intake mechanism 74 .

As shown in FIG. 9, the suction portion 73 includes a suction plate 81 having a rectangular shape when viewed from the Z direction. The suction plate 81 has a tubular portion 82 protruding in the Z2 direction from its central portion. In addition, as shown in FIG. 10, the suction plate 81 has a square-shaped concave portion 83 in the central portion of the lower surface. The size of the concave portion 83 when viewed in the Z direction is smaller than that of the elastic sheet 2 . A communication port 84 that penetrates the suction plate 81 in the Z direction is provided in the central portion of the concave portion 83 . The communication port 84 communicates with the cylindrical portion 82 .

A sheet-like net member 85 is fixed to the lower surface of the suction plate 81 . The net member 85 is rectangular and closes the recess 83 from below. A sheet-like frame 86 is attached to the outer periphery of the net member 85 . In this example, the mesh member 85 is a wire mesh and has conductivity. The frame body 86 is based on crepe paper. More specifically, the frame body 86 is configured by attaching a base material made of crepe paper and a tape having an adhesive layer provided on one side of the base material to the outer peripheral edge of the net member 85 in a frame shape. ing. The surface of the tape, that is, the bottom surface of the frame 86 is rough. Here, the lower surface of the frame 86 and the lower surface of the net member 85 constitute an attraction surface 71 for attracting the elastic sheet 2 . Therefore, the attracting surface 71 has a rough surface portion. Moreover, the attraction surface 71 includes a conductive metal portion. The suction port 72 provided in the adsorption surface 71 is a large number of openings provided in the net member 85 .

The frame-shaped portion 71 a of the adsorption surface 71 made up of the frame body 86 contacts the outer peripheral edge of the elastic sheet 2 when the adsorption surface 71 adsorbs the elastic sheet 2 . The surface of the frame-shaped portion 71a satisfies the following conditional expression (7), where R is the ten-point average roughness.
8 μm≦R (7)
In this example, R=50 μm, which satisfies conditional expression (7).

As shown in FIG. 9, the intake mechanism 74 includes an ejector 88. The ejector 88 includes an air inlet 88a, a diffuser, a body that allows communication between the diffuser and the air inlet 88a, and an airflow generation mechanism that causes driving fluid to flow into the body to generate an airflow from the air inlet 88a toward the diffuser. , is well known. The ejector 88 communicates with the cylindrical portion 82 of the suction plate 81 at an air inlet 88a. As a result, the air inlet 88 a of the ejector 88 communicates with the intake port 72 , which is the opening of the net member 85 , through the tubular portion 82 , the communication port 84 and the recess 83 of the suction plate 81 .

As shown in FIG. 1, the adsorption section moving mechanism 75 includes a support section 91 that supports the adsorption section 73, and a support section movement mechanism 92 that moves the support section 91 in the Y direction and the Z direction. The support portion moving mechanism 92 includes a drive source such as a motor. As shown in FIG. 2, the suction section moving mechanism 75 moves the suction section 73 along a predetermined transport path G1 set in advance.

Here, as shown in FIG. 1, the supply mechanism 52 includes a transport control section 93 that drives and controls the suction mechanism 74 and the elastic sheet moving mechanism 54. As shown in FIG. The conveying control unit 93 is provided integrally with the control unit 7 of the elastic sheet punching system 1 or communicable with it. When the elastic sheet 2 is supplied from the stocker 53 to the table 51 , the transport control section 93 first drives and controls the adsorption section moving mechanism 75 to move the adsorption section 73 so that the adsorption surface 71 is stacked on the stocker 53 . The two elastic sheets 2 are opposed to each other with a gap therebetween. Next, the transport control unit 93 drives the suction mechanism 74 to suck up the elastic sheet 2 to be adsorbed on the adsorption surface 71, and drives the adsorption unit moving mechanism 75 to move the adsorption unit 73 along the predetermined transport path G1. Move in the Y2 direction. After that, the transport control section 93 arranges the adsorption section 73 at a position where the adsorption surface 71 thereof faces the placement area C of the table surface 51a. After that, the transport control unit 93 stops driving the intake mechanism 74 . As a result, the elastic sheet 2 is dropped from the suction surface 71 and supplied to the mounting area C. As shown in FIG.

(table and positioning mechanism)
FIG. 11 is an explanatory diagram of the table 51 and the positioning mechanism. As shown in FIG. 2 , the table 51 is positioned in the Y2 direction of the stocker 53 . The table 51 is made of metal and has a horizontal table surface 51a. As shown in FIG. 11, a coating layer 99 containing fluororesin is provided on the table surface 51a. In this example, the fluororesin contained in the coating layer 99 is PTFE. A placement area C on which the elastic sheet 2 supplied from the supply mechanism 52 is placed is set in the central portion of the table surface 51a. The placement area C is an area wider than the planar shape of the elastic sheet 2 when viewed from the thickness direction. A supply position D for positioning the elastic sheet 2 is set in the central portion of the placement area C. As shown in FIG. The supply position D is an area having a shape and size corresponding to the planar shape of the elastic sheet 2 . The placement area C is provided with a plurality of vents 101 . A plurality of vents 101 are arranged in a matrix. In this example, the plurality of vents 101 are provided in a rectangular area including the supply position D. As shown in FIG.

The table 51 is provided with a second sensor 103 that detects that the elastic sheet 2 has been supplied to the table surface 51a. The second sensor 103 includes a light emitting portion, a light receiving portion, and a sensing portion 103a. The light emitting section and the light receiving section are connected by an optical fiber. The sensing section 103a is provided between the light emitting section and the light receiving section in the optical fiber. The sensing part 103a is provided in the center of the table surface 51a. The light emitting section and the light receiving section are arranged below the table 51 . The second sensor 103 is connected to the controller 7 of the elastic sheet punching system 1 . When the elastic sheet 2 is supplied to the table surface 51a, the amount of light received by the light receiving section varies. This changes the output from the light receiving section. Therefore, based on the output from the second sensor 103, the control section 7 can detect the presence of the elastic sheet 2 on the table surface 51a.

The positioning mechanism 55 positions the elastic sheet 2 at the supply position D when the elastic sheet 2 is placed on the placement area C. As shown in FIG. 1, the positioning mechanism 55 includes a levitation mechanism 105 for ejecting air from a ventilation port 101 provided in the placement area C on the table surface 51a to levitate the elastic sheet 2 from the table surface 51a, and a levitation mechanism 105 for levitation. and an arrangement mechanism 106 for moving the elastic sheet 2 along the table surface 51a and arranging it at a floating position F located in the Z2 direction of the supply position D. The supply position D and the floating position F are regions having a shape facing the elastic sheet 2 in a planar shape.

The levitation mechanism 105 includes a compressor and an air pump (not shown). The air pump communicates with the vent 101 and blows compressed air from the compressor through the vent 101 . Here, when the elastic sheet 2 is lifted from the table surface 51a by the floating mechanism 105, the entire elastic sheet 2 is not separated from the table surface 51a, and a part of the elastic sheet 2 is in contact with the table surface 51a. including the state of being Accordingly, the state in which the elastic sheet 2 is arranged at the floating position F includes a state in which a portion of the elastic sheet 2 is in contact with the table surface 51a.

As shown in FIG. 11, the arranging mechanism 106 includes a first arranging member 111 that can contact the outer peripheral edge of the elastic sheet 2 floating in the mounting area C from the X1 direction, and an elastic sheet 2 that floats in the mounting area C. A second arranging member 112 capable of contacting the outer peripheral edge from the X1 direction, a third arranging member 113 capable of contacting the outer peripheral edge of the elastic sheet 2 floating in the mounting area C from the Y1 direction, and floating in the mounting area C. A fourth arrangement member 114 is provided that can contact the outer peripheral edge of the elastic sheet 2 from the Y2 direction. The first arrangement member 111 and the second arrangement member 112 are plate-shaped members that stand up from the table surface 51a and extend in the Y direction. The third arrangement member 113 and the fourth arrangement member 114 are plate-shaped members that stand up from the table surface 51a and extend in the X direction.

Further, the arranging mechanism 106 moves the first arranging member 111 in the Z1 direction of the table 51 between a first separation position H1 and a floating position F in the X1 direction of the mounting area C in the X direction. a second placement member moving mechanism 115, a second placement member moving mechanism 116 that moves the second placement member 112 in the X direction between a second separation position H2 that separates the second placement member 112 in the X2 direction from the mounting area C and a floating position F; A third arrangement member moving mechanism 117 that moves the third arrangement member 113 in the Y direction between a third separation position H3 that separates the arrangement member 113 in the Y1 direction in the mounting area C and a floating position F, and a fourth arrangement member 114 are placed. A fourth arranging member moving mechanism 118 is provided for moving in the Y direction between the fourth spaced position H4 and the floating position F, which are spaced apart in the Y2 direction of the area C. As shown in FIG. Each arrangement member moving mechanism 115-118 moves each arrangement member 111-114 along a slit 119 provided in the table surface 51a.

Here, as shown in FIG. 1, the positioning mechanism 55 includes a levitation mechanism 105, a first placement member moving mechanism 115, a second placement member moving mechanism 116, a third placement member moving mechanism 117, and a fourth placement member moving mechanism. 118 to position the elastic sheet 2 at the supply position D is provided. More specifically, the positioning control unit 120 includes a levitation mechanism control unit 121 that drives and controls the levitation mechanism 105, a first placement member moving mechanism 115, a second placement member moving mechanism 116, a third placement member moving mechanism 117, and a movement control unit 122 that drives and controls the fourth arrangement member movement mechanism 118 . The positioning control unit 120 is provided integrally with the control unit 7 of the elastic sheet punching system 1 or communicable with it.

When the elastic sheet 2 is supplied to the placement area C, the positioning control unit 120 drives the floating mechanism 105 to float the elastic sheet 2 from the table surface 51a, and also moves the first placement member moving mechanism 115, the second placement member By driving the member moving mechanism 116, the third arranging member moving mechanism 117, and the fourth arranging member moving mechanism 118, the first arranging member 111 at the first spaced position H1 and the second arranging member at the second spaced position H2 are moved. 112, the third arrangement member 113 at the third spaced position H3 and the fourth arrangement member 114 at the fourth spaced position H4 are moved toward the floating position F at the same time. As a result, the elastic sheet 2 moves to the supply position D in contact with the arrangement members 111-114. When the elastic sheet 2 is placed at the levitation position F, the levitation mechanism control section 121 stops the levitation mechanism 105 . As a result, the elastic sheet 2 is lowered from the floating position F and placed at the supply position D. As shown in FIG. When the elastic sheet 2 is arranged at the supply position D, the movement control section 122 operates the first arrangement member moving mechanism 115, the second arrangement member movement mechanism 116, the third arrangement member movement mechanism 117, and the fourth arrangement member movement mechanism. 118 is driven to move the first, second, third, and

fourth arrangement members

111, 112, 113, and 114 at the levitation position F to the first separation position H1 and the second separation position H2, respectively. , the third spaced position H3, and the fourth spaced position H4.

(transport mechanism)
The conveying mechanism 56 conveys the elastic sheet 2 positioned at the supply position D to the first punching position A set on the first die plate 18 of the first elastic sheet punching device 3 . The transport mechanism 56 has the same configuration as the elastic sheet moving mechanism 54 of the supply mechanism 52 . Accordingly, in the description of the conveying mechanism 56, the same names and the same reference numerals are given to the components corresponding to those of the elastic sheet moving mechanism 54, and detailed description thereof will be omitted.

As shown in FIG. 1 , the transport mechanism 56 includes an adsorption portion 73 (first adsorption portion) including an adsorption surface 71 (first adsorption surface) and an intake port 72 (first intake port) provided on the adsorption surface 71 . , a suction mechanism 74 (first suction mechanism) communicating with the suction port 72 , and a suction portion moving mechanism 75 (first suction portion moving mechanism) for moving the suction portion 73 and the suction mechanism 74 . As shown in FIG. 5( a ), the suction unit 73 has a suction plate 81 . The suction plate 81 has a tubular portion 82 protruding in the Z2 direction from its central portion. The suction plate 81 also has a square-shaped recessed portion 83 in the central portion of the lower surface. A communication port 84 that penetrates the suction plate 81 in the Z direction is provided in the central portion of the concave portion 83 . The communication port 84 communicates with the cylindrical portion 82 .

As shown in FIG. 10(b), a sheet-like net member 85 is fixed to the lower surface of the suction plate 81 to block the concave portion 83 from below. A sheet-like frame 86 is attached to the outer periphery of the net member 85 . The mesh member 85 is a wire mesh and has conductivity. The lower surface of the frame 86 is rough. The lower surface of the frame 86 and the lower surface of the net member 85 form an attraction surface 71 for attracting the elastic sheet 2 . Therefore, the attracting surface 71 has a rough surface portion. Moreover, the attraction surface 71 includes a conductive metal portion. The suction port 72 provided in the adsorption surface 71 is a large number of openings provided in the net member 85 . The frame-shaped portion 71 a of the adsorption surface 71 made up of the frame body 86 contacts the outer peripheral edge of the elastic sheet 2 when the adsorption surface 71 adsorbs the elastic sheet 2 . The surface of the frame-shaped portion 71a has R=50 μm, where R is the ten-point average roughness, and satisfies the above conditional expression (7).

As shown in FIG. 10( a ), the intake mechanism 74 has an ejector 88 . An air inlet 88 a of the ejector 88 communicates with the intake port 72 , which is an opening of the net member 85 , through the cylindrical portion 82 of the suction plate 81 , the communication port 84 and the recess 83 . As shown in FIG. 1, the suction section moving mechanism 75 includes a support section 125 that supports the suction section 73, and a support section movement mechanism 126 that moves the support section 125 in the X direction and the Z direction. The support portion moving mechanism 126 includes a drive source such as a motor.

Here, as shown in FIG. 1 , the transport mechanism 56 includes a transport control section 123 (first transport control section) that drives and controls the intake mechanism 74 and the suction section moving mechanism 75 . The conveying control unit 123 is provided integrally with the control unit 7 of the elastic sheet punching system 1 or communicable with it. When the elastic sheet 2 is positioned at the supply position D on the table 51 , the transport control unit 123 drives and controls the adsorption unit moving mechanism 75 to move the adsorption unit 73 and move the adsorption surface 71 to the supply position D. The arranged elastic sheets 2 are opposed to each other with a gap. Next, the transport control unit 123 drives the suction mechanism 74 to suck up the elastic sheet 2 to be adsorbed on the adsorption surface 71, and drives the adsorption unit moving mechanism 75 to move the adsorption unit 73 along the predetermined transport path G2. Move in the Y2 direction. Thereafter, the transport control section 123 causes the adsorption section 73 to face the first punching position A set on the first die plate 18 of the first elastic sheet punching device 3 . After that, the transport control unit 123 stops driving the suction mechanism 74 . As a result, the elastic sheet 2 is dropped from the suction surface 71 and arranged at the first punching position A. As shown in FIG.

(Second elastic sheet conveying device)
FIG. 12(a) is a cross-sectional view of the suction portion 73 of the second elastic sheet conveying device 6. FIG. FIG. 12B is a perspective view of the suction portion 73 of the second elastic sheet conveying device 6 as viewed from the Z1 direction. FIG. 12( a ) schematically shows a state in which the elastic sheet 2 is sucked by the suction portion 73 . The second elastic sheet conveying device 6 moves the elastic sheet 2 arranged at the first punching position A of the first elastic sheet punching device 3 to the second die plate 18 of the second elastic sheet punching device 4 . It is conveyed to the punching position B. The second elastic sheet conveying device 6 has a structure corresponding to the elastic sheet moving mechanism 54 and the conveying mechanism 56 of the first elastic sheet conveying device 5 . Accordingly, in the description of the second elastic sheet conveying device 6, the same names and the same reference numerals are given to the structures corresponding to the elastic sheet moving mechanism 54 and the conveying mechanism 56, and detailed description thereof will be omitted.

As shown in FIG. 1, the second elastic sheet conveying device 6 includes a suction portion 73 (second suction port) including a suction surface 71 (second suction surface) and an air intake port 72 (second suction port) provided on the suction surface 71 . 2 adsorption portion), an intake mechanism 74 (second intake mechanism) communicating with the intake port 72, and an adsorption portion moving mechanism 75 (second adsorption portion moving mechanism) for moving the adsorption portion 73 and the intake mechanism 74. . As shown in FIG. 7 , the suction section 73 has a suction plate 81 . The suction plate 81 has a tubular portion 82 protruding in the Z2 direction from its central portion. The suction plate 81 also has a square-shaped recessed portion 83 in the central portion of the lower surface. A communication port 84 that penetrates the suction plate 81 in the Z direction is provided in the central portion of the concave portion 83 . The communication port 84 communicates with the cylindrical portion 82 .

As shown in FIG. 12, a sheet-like net member 85 is fixed to the lower surface of the suction plate 81 to block the concave portion 83 from below. A sheet-like frame 86 is attached to the outer periphery of the net member 85 . A sheet-like rectangular body 87 is attached to the inner peripheral side of the frame body 86 of the net member 85 . The lower surfaces of the rectangular body 87 and the frame body 86 are rough surfaces. The rectangular body 87 and the frame body 86 are spaced apart in the radial direction, and the net member 85 is exposed downward from the gap between the rectangular body 87 and the frame body 86 . The frame-shaped net portion 85a exposed from the gap between the rectangular body 87 and the frame body 86 in the net member 85 is attached to the frame-shaped burr portion 61a of the elastic sheet 2 when the adsorption portion 73 adsorbs the elastic sheet 2. opposite. A plurality of openings of the frame-like mesh portion 85 a exposed from the gap between the rectangular body 87 and the frame body 86 in the mesh member 85 are the intake ports 72 .

The lower surface of the rectangular body 87 , the lower surface of the frame 86 , and the lower surface of the frame-shaped net portion 85 a exposed from the gap between the rectangular body 87 and the frame 86 in the net member 85 attract the elastic sheet 2 . composes the adsorption surface 71 of. The attraction surface 71 thus comprises a conductive metal portion. Here, the frame-shaped portion 71 a and the rectangular portion 71 b of the adsorption surface 71 , which are composed of the frame body 86 and the rectangular body 87 , come into contact with the central portion and the outer peripheral edge of the elastic sheet 2 when the elastic sheet 2 is adsorbed on the adsorption surface 71 . do. The surface of the frame-shaped portion 71a and the surface of the rectangular portion 71b have R=50 μm, where R is the ten-point average roughness, and satisfy the above conditional expression (7).

The intake mechanism 74 has an ejector 88 . An air inlet 88 a of the ejector 88 communicates with the intake port 72 , which is an opening of the net member 85 , through the cylindrical portion 82 of the suction plate 81 , the communication port 84 and the recess 83 .

As shown in FIG. 1, the adsorption section moving mechanism 75 includes a support section 127 that supports the adsorption section 73, and a support section movement mechanism 128 that moves the support section 125 in the X direction and the Z direction. The support portion moving mechanism 128 includes a driving source such as a motor. In this example, the support portion moving mechanism 126 of the transport mechanism 56 also serves as the support portion moving mechanism 128 of the second elastic sheet transport device 6 . That is, in this example, the supply position D, the first punching position A, and the second punching position B are set at equal intervals in the X direction. The table surface 51a, the die plate surface 18a of the first die plate 18, and the die plate surface 18a of the second die plate 18 are set to the same height. As a result, the support portion moving mechanism 126 of the transport mechanism 56 simultaneously moves the support portion 125 of the transport mechanism 56 and the support portion 125 of the second elastic sheet transport device 6 at regular intervals, thereby moving from the supply position D to the first position. The movement of the elastic sheet 2 to the punching position A and the movement of the elastic sheet 2 from the first punching position A to the second punching position B can be performed in parallel.

Here, the second elastic sheet conveying device 6 includes a conveying control section 124 (second conveying control section) that drives and controls the suction mechanism 74 and the suction section moving mechanism 75 . The conveying control unit 124 is provided integrally with the control unit 7 of the elastic sheet punching system 1 or communicable with it. When the punching operation of the inner burr portion 61 b of the elastic sheet 2 is completed in the first elastic sheet punching device 3 , the conveyance control section 124 drives and controls the suction section moving mechanism 75 to move the suction section 73 so that the suction surface 71 are opposed to the elastic sheet 2 at the first punching position A on the die plate surface 18a with a gap therebetween. Next, the conveying control unit 124 drives the suction mechanism 74 to suck up the elastic sheet 2 in the Z2 direction and suck it onto the suction surface 71 . Further, the transport control unit 124 drives the adsorption unit moving mechanism 75 to move the adsorption unit 73 in the X1 direction along the predetermined transport route G3. After that, the transport control section 124 causes the adsorption section 73 to face the second punching position B set on the second die plate 18 of the second elastic sheet punching device 4 . After that, the transport control unit 124 stops driving the intake mechanism 74 . As a result, the elastic sheet 2 is dropped from the suction surface 71 and arranged at the second punching position B. As shown in FIG.

(Operation of elastic sheet punching system)
13 is a flow chart of the operation of the elastic sheet punching system 1. FIG. As shown in FIG. 8, when manufacturing the sealing material, first, the elastic sheet 2 is held by the stocker 53 and arranged at the staying position E. Then, as shown in FIG. Thereby, the elastic sheet 2 is retained in the temperature bath 70 (step ST1). Next, the elastic sheet punching system 1 conveys the elastic sheet 2 from the stocker 53 to the table 51 (step ST2), and positions the elastic sheet 2 at the supply position D on the table 51 (step ST3). Thereafter, the elastic sheet punching system 1 conveys the elastic sheet 2 from the supply position D to the first punching position A of the first elastic sheet punching device 3 (step ST4). The inner burr portion 61b is punched out (step ST5). After that, the elastic sheet punching system 1 conveys the elastic sheet 2 from the first punching position A to the second punching position B of the second elastic sheet punching device 4 (step ST6). The annular product portion 60 of the sheet 2 is punched (step ST7). This completes the production of the sealing material.

(Retention of elastic sheet in temperature bath)
The elastic sheet 2 manufactured by the rubber injection molding machine is loaded on the stocker 53 and arranged at the retention position E inside the temperature bath 70 . Thereby, the elastic sheet 2 is retained in the temperature bath 70 for a predetermined time or longer.

Here, the dimensions of the elastic sheet 2 may vary for each manufacturing lot due to the temperature and pressure conditions during manufacturing. Therefore, depending on the production lot, the dimensions of the elastic sheet 2 may not match the design dimensions. To address this problem, in this example, the temperature inside the temperature bath 70 is adjusted to change the dimensions of the elastic sheet 2 stored in the stocker 53 so as to match the design dimensions.

When changing the dimensions of the elastic sheet 2, the temperature inside the bath is adjusted within the range of -50°C to 60°C. When the temperature in the bath is increased by 10° C., the dimension of the elastic sheet 2 increases by 0.1% to 0.3%. Note that depending on the elastic sheet 2 , the viscosity of the elastic sheet 2 may be increased by adjusting the temperature in the tank to increase the rigidity of the elastic sheet 2 . Further, when the elastic sheet 2 is charged with static electricity, the temperature in the tank may be set to 0° or less. If the temperature in the bath is set to 0° or less, dew condensation occurs on the surface of the elastic sheet 2 when the elastic sheet 2 is transported out of the temperature bath 70 . This removes static electricity.

If the dimensions of the elastic sheet 2 are the design dimensions, the elastic sheet 2 can be positioned on the table 51 with high accuracy in step ST3. If the dimensions of the elastic sheet 2 are set as design dimensions, the elastic sheet 2 is punched at the first punching position A of the first elastic sheet punching device 3 and at the second punching position of the second elastic sheet punching device 4 in steps ST5 and ST7. Since it can be arranged at the position B with high precision, a desired portion of the elastic sheet 2 can be punched out with high precision.

(Conveyance of elastic sheet from stocker to table)
When manufacturing the sealing material, the transport control unit 93 drives and controls the suction mechanism 74 and the elastic sheet moving mechanism 54 of the supply mechanism 52 to move the elastic sheet 2 in the stocker 53 to the suction surface 71 of the suction unit 73 . By suction, the suction portion 73 is moved along a predetermined transport path G1 (see FIG. 2), and is supplied to the placement area C set on the table 51 by releasing the suction.

Here, the intake mechanism 74 that sucks air from the intake port 72 of the adsorption surface 71 has an ejector 88 that sucks a large amount of air per unit time. Therefore, after the suction surface 71 of the suction unit 73 faces the elastic sheet 2 with a gap, the transport control unit 93 can drive the suction mechanism 74 to suck up the elastic sheet 2 and cause it to adhere to the suction surface 71 . can. As a result, the elastic sheet 2 can be attracted to the attracting surface 71 without pressing the attracting surface 71 against the elastic sheet 2, so that the elastic sheet 2 is deformed or broken when the elastic sheet 2 is attracted to the attracting surface 71. can be prevented.

Further, as shown in FIG. 10, the adsorption surface 71 has a frame-shaped portion 71a that contacts the outer peripheral edge of the elastic sheet 2 when the elastic sheet 2 is adsorbed. The intake port 72 is positioned on the inner peripheral side of the frame-shaped portion 71a. The frame-shaped portion 71a has a rough surface. Therefore, when the suction portion 73 is sucking the elastic sheet 2 onto the suction surface 71 by driving the ejector 88, the frame-shaped portion 71a of the suction surface 71 and the outer peripheral edge of the elastic sheet 2 in contact with the frame-shaped portion 71a are formed. Air flows between In other words, when the elastic sheet 2 is adsorbed on the adsorption surface 71, the inside of the frame-shaped portion 71a where the intake port 72 exists is drawn from the outer peripheral side of the elastic sheet 2 between the adsorption surface 71 and the elastic sheet 2. An air current directed toward the peripheral side is generated. As a result, the suction surface 71 and the elastic sheet 2 do not come into close contact with each other, so that the elastic sheet 2 is easily separated from the suction surface 71 when the drive of the ejector 88 is stopped. Therefore, it is easy to arrange the elastic sheet 2 in the mounting area C of the table 51 .

Furthermore, the surface of the frame-shaped portion 71a has a surface roughness R of 50 μm, where R is the ten-point average roughness, and satisfies the following conditional expression (7).
8 μm≦R (7)
Therefore, when the suction portion 73 is sucking the elastic sheet 2 onto the suction surface 71 by driving the ejector 88 , air can easily flow between the suction surface 71 and the elastic sheet 2 . Here, when the ten-point average roughness R is below the lower limit value of conditional expression (7), it becomes difficult for air to flow between the adsorption surface 71 and the elastic sheet 2 .

The attraction surface 71 also includes a metal portion (mesh member 85) made of a conductive metal. Therefore, even if the elastic sheet 2 is charged with static electricity, the charge can be released from the metal portion to the adsorption portion 73 side.

(Positioning of elastic sheet supplied to table)
When the elastic sheet 2 is supplied onto the table 51 , the positioning control section 120 acquires that the elastic sheet 2 is arranged in the placement area C from the output from the second sensor 103 . When the elastic sheet 2 is placed in the placement area C, the positioning control unit 120 drives the levitation mechanism 105 to eject air from the air vent 101 of the table surface 51a, thereby levitating the elastic sheet 2 from the table surface 51a. Let In addition, as indicated by arrows in FIG. 11, the positioning control unit 120 operates in parallel with the first arrangement member moving mechanism 115, the second arrangement member movement mechanism 116, the third arrangement member movement mechanism 117, and the fourth arrangement member movement mechanism 117. By driving the arrangement member moving mechanism 118, the first arrangement member 111 at the first separation position H1, the second arrangement member 112 at the second separation position H2, the third arrangement member 113 at the third separation position H3, and The fourth placement member 114 at the fourth spaced position H4 is moved toward the floating position F at the same time.

When the first arranging member 111, the second arranging member 112, the third arranging member 113, and the fourth separation position H4 reach the supply position D, the elastic sheet 2 is arranged at the floating position F located above the supply position D. be done. When the first arrangement member 111, the second arrangement member 112, the third arrangement member 113, and the fourth separation position H4 reach the supply position D, the positioning control section 120 stops the levitation mechanism 105. FIG. As a result, the elastic sheet 2 descends from the floating position F and is placed at the supply position D on the table surface 51a.

Here, the state in which the elastic sheet 2 floats above the table surface 51a includes the state in which the entire elastic sheet 2 is not separated from the table surface 51a and a portion of the elastic sheet 2 is in contact with the table surface 51a. be Even when a part of the elastic sheet 2 is in contact with the table surface 51a, the elastic sheet 2 moves on the table 51 without stick-slip because the elastic sheet 2 is floating. Further, even when a portion of the elastic sheet 2 is in contact with the table surface 51a, the elastic sheet 2 can easily move on the table 51 because the table surface 51a is provided with the coating layer 99 containing the fluororesin.

After that, when the elastic sheet 2 is arranged at the supply position D, the positioning control section 120 controls the first arrangement member moving mechanism 115, the second arrangement member movement mechanism 116, the third arrangement member movement mechanism 117, and the fourth arrangement member movement mechanism 117. By driving the moving mechanism 118, the first arrangement member 111, the second arrangement member 112, the third arrangement member 113, and the fourth arrangement member 114 at the supply position D are respectively moved to the first separation position H1 and the second separation position H1. Position H2, third spaced position H3, and fourth spaced position H4.

(Conveyance of elastic sheet from supply position to first elastic sheet punching device)
When the elastic sheet 2 is positioned at the supply position D on the table surface 51 a , the transport control unit 123 drives and controls the suction mechanism 74 and the suction unit moving mechanism 75 of the transport mechanism 54 to move the elastic sheet 2 to the suction unit 73 . It sticks to the suction surface 71, moves the suction part 73 along the predetermined transport path G2 (see FIG. 2), and arranges it at the first punching position A by releasing the suction.

Here, in the transport mechanism 54, the suction mechanism 74 that sucks air from the suction mechanism 74 of the adsorption surface 71 has an ejector 88 that sucks a large amount of air per unit time. Therefore, after the suction surface 71 of the suction unit 73 faces the elastic sheet 2 with a gap, the transport control unit 123 can drive the suction mechanism 74 to suck up the elastic sheet 2 and have the suction surface 71 absorb the elastic sheet 2 . can. As a result, the elastic sheet 2 can be attracted to the attraction surface 71 without pressing the attraction surface 71 against the elastic sheet 2, so that the elastic sheet 2 can be prevented from being deformed when the elastic sheet 2 is attracted to the attraction surface 71. - 特許庁

The suction surface 71 also includes a frame-shaped portion 71a that contacts the outer peripheral edge of the elastic sheet 2 when the elastic sheet 2 is suctioned. The intake mechanism 74 is positioned on the inner peripheral side of the frame-shaped portion 71a. The surface of the frame-shaped portion 71a has R=50 μm, where R is the ten-point average roughness, and satisfies the above conditional expression (7). Therefore, when the suction portion 73 is sucking the elastic sheet 2 onto the suction surface 71 by driving the ejector 88, the frame-shaped portion 71a of the suction surface 71 and the outer peripheral edge of the elastic sheet 2 in contact with the frame-shaped portion 71a are formed. Air flows between As a result, the suction surface 71 and the elastic sheet 2 do not come into close contact with each other, so that the elastic sheet 2 is easily separated from the suction surface 71 when the drive of the ejector 88 is stopped and the suction is released. Therefore, it is easy to arrange the elastic sheet 2 at the first punching position A. As shown in FIG. Therefore, the elastic sheet 2 can be accurately arranged at the first punching position A.

Furthermore, the attraction surface 71 has a metal portion (mesh member 85) made of a conductive metal. Therefore, even if the elastic sheet 2 is charged with static electricity, the charge can be released from the metal portion to the adsorption portion 73 side.

(Punching of elastic sheet by first elastic sheet punching device)
When the elastic sheet 2 is supplied to the first punching position A, the punch plate 13 is arranged at the standby position 13A. As shown in FIG. 4, when the elastic sheet 2 is supplied to the first punching position A, the elastic sheet 2 is set in the die plate side concave portion 28 of the first die plate 18 . When the elastic sheet 2 is set, the first punching control section 22 lowers the first punch plate 13 from the standby position 13A toward the punching completion position 13B. After that, as shown in FIG. 5, when the first punch plate 13 approaches the first die plate 18, the first elastic sheet punching device 3 brings the first stripper plate 15 and the first die plate 18 into contact to An elastic sheet 2 is sandwiched between After that, when the first punch plate 13 further approaches the first die plate 18, as shown in FIG. 12 punches the inner burr portion 61 b of the elastic sheet 2 and inserts the tip portion 14 of the first punch portion 12 into the first hole portion 19 . After that, the first punching controller 22 separates the first punch plate 13 and the first stripper plate 15 from the first die plate 18 in the Z2 direction. Thereby, as shown in FIG. 4, the punch plate 13 returns to the standby position 13A.

Here, the intake mechanism control section 35 drives the intake mechanism 34 while the first stripper plate 15 is in contact with the first die plate 18 . Further, the first punching control unit 22 returns the first punch plate 13 from the punching completion position 13B to the standby position 13A faster than the first speed V1 for moving the first punch plate 13 from the standby position 13A to the punching completion position 13B. Decrease the second speed V2.

In this example, the first stripper plate 15 and the first die plate 18, which sandwich the elastic sheet 2 from the Z direction during punching, define a space 29 having a transfer shape to which the shape of the elastic sheet 2 is transferred when they are brought into contact with each other. A stripper plate side recess 27 and a die plate side recess 28 are provided. Therefore, when the elastic sheet 2 is sandwiched between the first stripper plate 15 and the first die plate 18, the elastic sheet 2 is accommodated in the space 29 to which its own shape is transferred. As a result, the elastic sheet 2 can be prevented or suppressed from being crushed and deformed before punching. Therefore, it is possible to prevent or suppress the first punch portion 12 from contacting a portion of the elastic sheet 2 other than the inner burr portion 61b to be punched.

Further, when the stripper plate surface 15a and the die plate surface 18a are brought into contact with each other, the elastic sheet 2 fits into the stripper plate side concave portion 27 having a transfer shape corresponding to the shape of the upper surface of the elastic sheet 2, and the elastic sheet 2 It fits into the die plate side concave portion 28 having a transfer shape corresponding to the shape of the lower surface of the . Therefore, the elastic sheet 2 is restricted from deforming in the in-plane direction of the die plate surface 18 a in the space 29 defined between the first stripper plate 15 and the first die plate 18 . Therefore, when the first punch part 12 penetrates the elastic sheet 2 , the elastic sheet 2 sticks to the first punch part 12 , and when the first punch part 12 enters the first hole part 19 , the elastic sheet 2 sticks to the elastic sheet 2 . It is possible to prevent or suppress the elastic sheet 2 from being drawn into the first hole portion 19 even when the elastic sheet 2 is pulled toward the first hole portion 19 .

Here, the die plate surface 18a and the inner surface 28a of the die plate side recess 28 are covered with a first coating layer 32 containing fluororesin. Therefore, the die plate surface 18a and the inner surface 28a of the die plate side recess 28 are more slippery than when these surfaces are metal surfaces. Therefore, even if the elastic sheet 2 and the die plate recessed portion 28 are displaced in the in-plane direction of the die plate surface 18a when the conveying mechanism 56 supplies the elastic sheet 2 to the die plate recessed portion 28, the elastic sheet 2 is not removed from the die plate. It slides on the plate surface 18a and the inner surface 28a of the die plate side recess 28, and is set in a state where the lower surface thereof fits into the die plate side recess 28. As shown in FIG. Thereby, the elastic sheet 2 is accurately positioned at the first punching position A on the first die plate 18 . Therefore, when the elastic sheet 2 is sandwiched between the first die plate 18 and the first stripper plate 15, the elastic sheet 2 is not crushed. Moreover, since the elastic sheet 2 is accurately arranged at the first punching position A on the first die plate 18 , the elastic sheet 2 can be accurately punched by the first punch portion 12 .

Also, the elastic sheet 2 is placed on the table 51 and positioned at the supply position D on the table 51 before being transported from the stocker 53 to the first punching position A. After that, the elastic sheet 2 positioned at the supply position D is moved by being attracted by the conveying mechanism, and is arranged at the first punching position A by releasing the attraction. Therefore, the elastic sheet 2 is positioned at the first punching position A with the same positioning precision as the positioning precision at the supply position D on the table 51 . Therefore, the elastic sheet 2 is supplied to the first punching position A with high accuracy.

Furthermore, in this example, the inner peripheral wall surface 19 a of the first hole portion 19 of the first die plate 18 is covered with the first coating layer 32 . Therefore, the inner peripheral wall surface 19a of the first hole portion 19 is more slippery than when the inner peripheral wall surface 19a is a metal surface. Therefore, when the elastic sheet 2 is drawn into the first hole portion 19 by the first punch portion 12 during punching, the elastic sheet 2 slides on the inner peripheral wall surface 19a of the first hole portion 19 . As a result, it is possible to prevent or suppress a decrease in the speed at which the first punch part 12 punches the elastic sheet 2 . Therefore, the elastic sheet 2 can be punched out with high accuracy by the first punch portion 12 .

The die plate surface 18a and the inner surface 28a of the die plate side recess 28 have D=10 μm, where D is the ten-point average roughness, and satisfy the following conditional expressions (5) and (6).
5 µm ≤ D ≤ 40 µm (5)
8 µm ≤ D ≤ 12 µm (6)
If the conditional expression (5) is satisfied, the contact area between the elastic sheet 2, the die plate surface 18a and the inner surface 28a of the die plate side recess 28 is reduced. Here, if the ten-point average roughness D is less than the lower limit value of conditional expression (5), the elastic sheet 2 tends to stick to the first die plate 18. It may be difficult to take out from the recess 28 . Further, when the ten-point average roughness D exceeds the upper limit of the conditional expression (5), the unevenness of the rough surface may damage the elastic sheet 2 . In this example, the ten-point average roughness of the die plate surface 18a and the inner surface 28a of the die plate side concave portion 28 satisfies conditional expression (6). Therefore, the elastic sheet 2 is less likely to stick to the die plate surface 18a and the inner surface 28a of the die plate side concave portion 28 . Further, since the die plate surface 18a and the inner surface 28a of the die plate side concave portion 28 are rough surfaces, the elastic sheet 2 is easily prevented from being damaged.

Further, the tip portion 14 of the first punch portion 12 includes a punching portion 25 and a column portion 26 in order from the tip toward the Z2 direction. The column portion 26 is thinner than the punched portion 25 and positioned inside the punched portion 25 when viewed in the Z direction. Therefore, when the tip portion 14 of the first punch portion 12 enters the first hole portion 19 of the first die plate 18, a gap is formed between the column portion 26 and the inner peripheral wall surface 19a of the first hole portion 19. be done. Therefore, when the tip portion 14 of the first punch portion 12 enters the first hole portion 19 and the punch portion 25 pulls the elastic sheet 2 toward the first hole portion 19, the elastic sheet 2 and the column portion 26 are separated from each other. Further, it is possible to prevent the first punch part 12 from pulling the elastic sheet 2 deep into the first hole part 19. - 特許庁Also, since a gap is formed between the column portion 26 and the inner peripheral wall surface 19 a of the first hole portion 19 , the annular product portion 60 of the elastic sheet 2 located on the outer peripheral side of the first punch portion 12 does not reach the column portion 26 . and the inner peripheral wall surface 19a of the first hole portion 19 can be prevented or suppressed from rubbing against each other. Thereby, it is possible to prevent the annular product portion 60 from being damaged.

In this example, the tip surface 12a of the first punch portion 12 is a rough surface. Further, the tip surface 12a of the first punch portion 12 has P=10 μm, where P is the ten-point average roughness, and satisfies the following conditional expressions (1) and (2).
5 µm ≤ P ≤ 20 µm (1)
8 µm ≤ P ≤ 12 µm (2)
If the conditional expression (1) is satisfied, the contact area between the tip surface 12a of the first punch portion 12 and the elastic sheet 2 can be reduced. Therefore, the inner burr portion 61b of the elastic sheet 2 punched by the first punch portion 12 sticks to the tip surface 12a of the first punch portion 12 and does not fall off, and the inner burr portion 61b is removed from the first punch plate 13 after punching. It is possible to prevent movement in the Z2 direction along with the That is, when the ten-point average roughness P is less than the lower limit value of conditional expression (1), the elastic sheet 2 tends to stick to the tip surface 12 a of the first punch portion 12 . If the ten-point average roughness P exceeds the upper limit of conditional expression (1), the elastic sheet 2 may be damaged when the tip surface 12a of the first punch portion 12 contacts the elastic sheet 2. . In this example, the ten-point average roughness P of the tip surface 12a of the first punch portion 12 satisfies the conditional expression (2). Therefore, the burr portion 61b is likely to fall off from the first punch portion 12. As shown in FIG. Moreover, it is easy to suppress that the product part 60 is damaged due to the rough surface of the first punch part 12 .

In addition, the first punch part 12 is provided with a central protruding portion 25b in the center of the tip face, which protrudes in the Z1 direction from the outer peripheral edge of the tip face. The tip of the central projecting portion 25b is a plane perpendicular to the axis of the first punch portion 12. As shown in FIG. Therefore, when the first punch portion 12 contacts the inner burr portion 61b of the elastic sheet 2, the flat surface of the tip of the central projecting portion 25b pushes the inner burr portion 61b of the elastic sheet 2 to elastically deform it. Therefore, after the inner burr portion 61b is punched by the first punch portion 12, the inner burr portion 61b returns to its original shape due to its own elastic restoring force. This makes it easier for the inner burr portion 61b to be separated from the tip end surface of the first punch portion 12 . Therefore, it is possible to prevent or suppress the inner burr portion 61b of the elastic sheet 2 punched by the first punch portion 12 from sticking to the first punch portion 12 and not coming off. Therefore, it is possible to prevent the inner burr portion 61b from moving in the Z2 direction together with the first punch portion 12 after punching.

Further, the first punching control unit 22 returns the first punch plate 13 from the punching completion position 13B to the standby position 13A at a speed higher than the first speed V1 for moving the first punch plate 13 from the standby position 13A to the punching completion position 13B. Decrease the second speed V2. As a result, the moving speed of the first stripper plate 15 when the first stripper plate 15 is separated from the elastic sheet 2 in the Z2 direction is slowed down. Therefore, it is possible to prevent or suppress the elastic sheet 2 from being pulled by the first stripper plate 15 spaced upward from the first die plate 18 . Therefore, it is possible to prevent or suppress the movement of the elastic sheet 2 on the first die plate 18 .

Further, the stripper plate surface 15a and the inner surface 27a of the stripper plate side concave portion 27 have S=10 μm, where S is the ten-point average roughness, and satisfy the following conditional expressions (3) and (4).
5 μm≦S≦40 μm (3)
8 μm≦S≦12 μm (4)
If the conditional expression (3) is satisfied, the contact area between the elastic sheet 2 and the stripper plate surface 15a and the inner surface 27a of the stripper plate side recess 27 can be reduced. Therefore, it is possible to prevent or suppress sticking of the elastic sheet 2 to the stripper plate surface 15a and the inner surface 27a of the stripper plate side concave portion 27 . Here, when the ten-point average roughness S is below the lower limit of conditional expression (3), the elastic sheet 2 tends to stick to the first stripper plate 15 . Therefore, when the first stripper plate 15 separates from the first die plate 18 in the Z2 direction, the elastic sheet 2 is pulled by the first stripper plate 15 and moves from the die plate side concave portion 28 of the first die plate 18. I can put it away. Further, when the ten-point average roughness S exceeds the upper limit of the conditional expression (3), the unevenness of the rough surface may damage the elastic sheet 2 . In this example, the ten-point average roughness S of the stripper plate surface 15a and the inner surface 27a of the stripper plate side recess 27 satisfies conditional expression (4). Therefore, it is easier to prevent the elastic sheet 2 from sticking to the first stripper plate 15 . In addition, since the stripper plate surface 15a and the inner surface 27a of the stripper plate side concave portion 27 are rough surfaces, it is easy to prevent the elastic sheet 2 from being damaged.

Furthermore, in this example, the intake mechanism control section 35 of the first recovery mechanism 23 drives the intake mechanism 34 while the first stripper plate 15 is in contact with the first die plate 18 . Therefore, when the first punch portion 12 punches the elastic sheet 2, the space between the radial outer surface of the tip portion 14 of the first punch portion 12 and the inner peripheral wall surface 19a of the first hole portion 19 is An air current directed toward the first collection box 24 is generated. As a result, it is possible to prevent or suppress the inner burr portion 61b of the elastic sheet 2 punched by the first punch portion 12 from sticking to the first punch portion 12 and not coming off. In addition, the inner burr portion 61b dropped from the first punch portion 12 can be easily collected into the first collection box 24 by the air current directed toward the first collection box 24 side.

(Conveyance of elastic sheet from first elastic sheet punching device to second elastic sheet punching device)
When the punching of the elastic sheet 2 by the first elastic sheet punching device 3 is completed, the conveying control unit 124 drives and controls the suction mechanism 74 and the suction unit moving mechanism 75 of the second elastic sheet conveying device 6 to punch out the elastic sheet 2. , the adsorption surface 71 of the adsorption portion 73 is moved, the adsorption portion 73 is moved along the predetermined transport path G3 (see FIG. 2), and is arranged at the second punching position B by releasing the adsorption.

Here, as shown in FIG. 12, the suction portion 73 of the second elastic sheet conveying device 6 has a suction port 72 in a frame-shaped opposing region facing the frame-shaped burr portion 61a of the elastic sheet 2 on the suction surface 71. . Thereby, the suction part 73 can suck the outer peripheral edge portion of the elastic sheet 2 to the suction surface 71 over the entire circumference. Therefore, even if a hole punched by the first elastic sheet punching device 3 is formed on the inner peripheral side of the frame-shaped burr portion 61 a of the elastic sheet 2 , the suction portion 73 can suck the elastic sheet 2 . In addition, since the suction portion 73 sucks the outer peripheral portion of the elastic sheet 2 over the entire circumference, it is possible to prevent or suppress the elastic sheet 2 that has been sucked from being bent. Therefore, the elastic sheet 2 can be accurately positioned at the second punching position B on the die plate surface 38a.

In addition, in the second elastic sheet conveying device 6, the suction mechanism 74 that sucks air from the third suction port of the suction surface 71 includes an ejector 88 that sucks a large amount of air per unit time. Therefore, after the suction surface 71 of the suction unit 73 faces the elastic sheet 2 with a gap, the transport control unit 124 can drive the suction mechanism 74 to suck up the elastic sheet 2 and cause it to be attracted to the suction surface 71 . can. The suction surface 71 includes a frame-shaped portion 71a that contacts the outer peripheral edge of the elastic sheet 2 when the elastic sheet 2 is sucked, and a rectangular portion 71b that contacts the inner peripheral side of the frame-shaped burr portion 61a of the elastic sheet 2. Prepare. The frame-shaped portion 71a and the rectangular portion 71b are rough surfaces. Therefore, air flows between the adsorption surface 71 and the elastic sheet 2 when the elastic sheet 2 is adsorbed on the adsorption surface 71 . As a result, the suction surface 71 and the elastic sheet 2 do not come into close contact with each other, so that the elastic sheet 2 is easily separated from the suction surface 71 when the drive of the ejector 88 is stopped. Therefore, it is easy to arrange the elastic sheet 2 at the second punching position B. As shown in FIG. Therefore, the elastic sheet 2 can be positioned at the second punching position B accurately.

In addition, the surface of the frame-shaped portion 71a and the surface of the rectangular portion 71b are R=50 μm, where R is the ten-point average roughness, and satisfy the above conditional expression (7). Therefore, air tends to flow between the adsorption surface 71 and the elastic sheet 2 when the adsorption portion 73 is adsorbing the elastic sheet 2 to the adsorption surface 71 by driving the ejector 88 .

(Punching of elastic sheet by second elastic sheet punching device)
When the elastic sheet 2 is supplied to the second punching position B, the elastic sheet 2 is set in the die plate side concave portion 28 of the second die plate 18 . When the elastic sheet 2 is set, the second punching control section 22 lowers the second punch plate 13 from the standby position 13A toward the punching completion position 13B. After that, when the second punch plate 13 approaches the second die plate 18, the second elastic sheet punching device 4 brings the second stripper plate 15 and the second die plate 18 into contact to form the elastic sheet 2 therebetween. Sandwich After that, when the second punch plate 13 further approaches the second die plate 18, the second elastic sheet punching device 4 punches the inner side of the elastic sheet 2 with the second punch part 12 projecting from the second stripper plate 15 in the Z1 direction. The tip portion 14 of the second punch portion 12 is inserted into the second hole portion 19 by punching out the burr portion 61b. After that, the second punch control unit 22 separates the second punch plate 13 and the second stripper plate 15 from the second die plate 18 in the Z2 direction. As a result, the punch plate 13 returns to the standby position 13A.

Here, the intake mechanism control section 35 drives the intake mechanism 34 while the second stripper plate 15 is in contact with the second die plate 18 . Further, the second punching control unit 22 returns the second punch plate 13 from the punching completion position 13B to the standby position 13A faster than the first speed V1 for moving the second punch plate 13 from the standby position 13A to the punching completion position 13B. Decrease the second speed V2.

When the punching of the elastic sheet 2 is completed and the second punch plate 13 and the second stripper plate are separated from the second die plate 18 in the Z2 direction, the elastic sheet removal mechanism control section 45 drives the air supply pump 43. , the compressed air is discharged from the nozzle 42 . Thereby, the elastic sheet removing mechanism 41 blows off the elastic sheet 2 arranged in the die plate side concave portion 28 and drops it in the X1 direction of the second die plate 18 .

Also in the second elastic sheet punching device 4, the same effect as the first elastic sheet punching device 3 can be obtained. Here, in the second elastic sheet punching device 4, the tip surface 12a of the second punch part 12 contacts the annular product part 60, but the ten-point average roughness of the tip surface 12a of the second punch part 12 is P= It is 10 μm, which is smaller than the upper limit of conditional expression (1) and the upper limit of conditional expression (2). Therefore, it is possible to prevent or suppress damage to the annular product portion 60 due to the rough surface of the tip surface 12a of the second punch portion 12 .

In the elastic sheet punching system 1 of this example, when manufacturing the annular sealing material, first, the inner burr portion 61b of the elastic sheet 2 is punched out by the first elastic sheet punching device 3 . Next, the elastic sheet 2 is conveyed from the first elastic sheet punching device 3 to the second elastic sheet punching device 4 . After that, the annular product portion 60 of the elastic sheet 2 is punched out by the second elastic sheet punching device 4 .

In this example, deformation of the elastic sheet 2 before and after punching can be prevented or suppressed in each of the first elastic sheet punching device 3 and the second elastic sheet punching device 4 . Therefore, in the first elastic sheet punching device 3, the first punch part 12 is prevented or suppressed from contacting the annular product part 60 adjacent to the inner burr part 61b to be punched and damaging the annular product part 60. be done. Also, in the first elastic sheet punching device 3, it is possible to prevent or suppress the formation of scratches and the occurrence of breakage in the annular product portion 60 positioned around the inner burr portion 61b to be punched. Therefore, when the annular product portion 60 is manufactured by two punching operations using the two elastic

sheet punching devices

3 and 4, the occurrence of damage to the annular product portion 60, which serves as the sealing material, is prevented or suppressed. can. Further, in the second elastic sheet punching device 4, deformation of the elastic sheet 2 during punching is prevented or suppressed. Therefore, the second elastic sheet punching device 4 can accurately punch out the annular product portion 60 that serves as the sealing material.

(Modification)
The first punch part 12 of the first elastic sheet punching device 3 may be made of resin. In this case, the resin forming the first punch portion 12 can be polyacetal resin, high molecular weight polyethylene resin, or fluororesin. This also makes the tip portion 14 of the first punch portion 12 slippery. Therefore, the same effects as those of the first punch portion 12 can be obtained. Here, the second punch part 12 of the second elastic sheet punching device 4 can also be made of resin.

(Modification of die plate)
FIG. 14 is an explanatory diagram of a die plate of a modified example. As shown in FIG. 14, in the first elastic sheet punching device 3, the first die plate 18 includes a resin die plate main body 150 and a metal support plate supporting the die plate main body 150 from the Z1 direction. 151 and . In this case, the die plate surface 18a, the inner surface 28a of the die plate side concave portion 28, and the inner peripheral wall surface 19a positioned radially outward of the tip portion 14 when the second punch portion 12 is inserted into the first hole portion 19 are , are provided in the die plate body portion 150 . The resin forming the die plate body 150 can be polyacetal resin, high molecular weight polyethylene resin, or fluororesin. Even in this way, the die plate surface 18a, the inner surface 28a of the die plate side concave portion 28, and the inner circumference located radially outside of the tip portion 14 when the second punch portion 12 is inserted in the first hole portion 19 The wall surface 19a becomes slippery. Therefore, the same effects as those of the first die plate 18 can be obtained. Here, the second die plate 18 of the second elastic sheet punching device 4 also has a resin die plate body 150 and a metal support plate 151 that supports the die plate body 150 from the Z1 direction. You can prepare.

(Modification of adsorption part)
FIG. 15(a) is a cross-sectional view of a suction portion of Modification 1. FIG. FIG. 15(b) is a perspective view of the suction unit of Modification 1 when viewed from the Z1 direction. FIG. 15( a ) schematically shows a state in which the elastic sheet 2 is sucked by the suction portion 73 . FIG. 16A is a cross-sectional view of a suction portion of Modification 2. FIG. FIG. 16(b) is a perspective view of the suction unit of Modification 2 when viewed from the Z1 direction. FIG. 16( a ) schematically shows a state in which the elastic sheet 2 is sucked by the suction portion 73 . The suction portion 73 of Modification 1 shown in FIG. 15 can be used as the suction portion 73 of the elastic sheet moving mechanism 54 and the suction portion 73 of the conveying mechanism 56 of the first elastic sheet conveying device 5 . The adsorption portion 73 of this example includes a conductive sheet metal member 130 instead of the net member 85 and the frame member 86 . As shown in FIG. 15, the sheet metal member 130 is fixed to the lower surface of the suction plate 81 to block the recess 83 from below. The sheet metal member 130 also includes a plurality of air intake ports 72 communicating with the recessed portion 83 at positions overlapping the recessed portion 83 when viewed in the Z direction. A plurality of intake ports 72 are formed in a matrix. A region of the sheet metal member 130 where the plurality of air inlets 72 are formed is smaller than the recessed portion 83 when viewed from the Z direction. The intake port 72 communicates with the ejector 88 via the recess 83 , the communication port 84 and the cylindrical portion 82 . The lower surface of the sheet metal member 130 is roughened.

Here, the lower surface of the sheet metal member 130 is the adsorption surface 71 . In the elastic member, the area outside the area where the plurality of air inlets 72 are formed is a frame-shaped portion 71a with which the outer peripheral edge of the elastic sheet 2 contacts when the elastic sheet 2 is attracted to the attracting surface 71 . The frame-shaped portion 71a has a rough surface. Even in this way, the same effects as those of the suction portion 73 of the elastic sheet moving mechanism 54 and the suction portion 73 of the transport mechanism 56 can be obtained.

Further, as in the suction portion 73 of Modified Example 2 shown in FIG. 16, when the suction port 72 is provided only in the opposing region corresponding to the frame-shaped burr portion 61a when the elastic sheet 2 is suctioned, the second conveying sheet It can be used in place of the suction unit 73 of the conveying device. That is, in the adsorption part 73 of the present example, the sheet metal member 130 that closes the recess 83 has a rectangular portion 71b that does not have the intake port 72 in the center of the adsorption surface 71, and has the intake port 72 on the outer peripheral side of the rectangular portion 71b. A rectangular region between the rectangular portion 71b and the frame-shaped portion 71a is provided with an intake port 72 communicating with the concave portion 83. As shown in FIG. The rectangular portion 71b and the frame-shaped portion 71a are rough surfaces. The suction portion 73 of this example can obtain the same effect as the suction portion 73 of the second elastic sheet conveying device 6 .

Claims

A punch plate comprising a plate portion and a punch portion protruding downward from the plate portion, a stripper provided with a through-hole through which the punch portion can pass in the vertical direction, and supported by the plate portion in a vertically movable state. a plate, a biasing member that biases the stripper plate to a lower end position of the lower end of the movement range thereof, and a biasing member that is positioned below the stripper plate and overlaps the punch portion when viewed from the vertical direction. A die plate having a hole capable of receiving a tip portion of a punch is provided. When an elastic sheet to be punched is placed on the die plate, the punch plate is brought close to the die plate from above, and the stripper plate and the die plate are arranged. After sandwiching the elastic sheet between the die plate and the die plate, the elastic sheet is punched by the punch portion protruding downward from the stripper plate, and the tip portion of the punch portion is inserted into the hole, and then Later, in the elastic sheet punching device for separating the punch plate and the stripper plate from the die plate to the above,
The stripper plate surface of the stripper plate and the die plate surface of the die plate facing each other in the vertical direction have a transfer shape obtained by transferring the shape of the elastic sheet when the stripper plate surface and the die plate surface are brought into contact with each other. An elastic sheet punching device, characterized in that a stripper plate side concave portion and a die plate side concave portion are provided to define a space of the elastic sheet.
The die plate comprises a metal die plate body and a fluororesin-containing coating layer provided on the surface of the die plate body,
The die plate surface, the inner surface of the die plate side recess, and the inner peripheral wall surface positioned radially outward of the punch when the punch is inserted into the hole are covered with the coating layer. The elastic sheet punching device according to claim 1, characterized in that:
The die plate includes a resin die plate body and a metal support plate that supports the die plate body from below,
The die plate surface, the inner surface of the die plate side concave portion, and the inner peripheral wall surface positioned radially outward of the punch portion when the punch portion is inserted into the hole are provided in the die plate body portion. 2. The elastic sheet punching device according to claim 1, wherein the elastic sheet punching device is characterized by:
The elastic sheet according to claim 1, wherein the die plate surface and the inner surface of the die plate side concave portion are rough surfaces, and satisfy the following conditional expression, where D is the ten-point average roughness: punching equipment.
5 μm ≤ D ≤ 40 μm
The tip portion of the punch portion includes a punching portion and a column portion in order from the tip toward the top,
2. The elastic sheet punching device according to claim 1, wherein the column portion is positioned inside the punching portion when viewed from the vertical direction.
The elastic sheet punching device according to claim 1, characterized in that the tip surface of the punch part is a rough surface.
The elastic sheet punching device according to claim 1, wherein the punch part is made of resin.
The punch part has a central protruding portion in the center of the tip surface that protrudes downward from the outer peripheral edge of the tip surface,
2. The elastic sheet punching device according to claim 1, wherein the tip of the central projecting portion is a plane perpendicular to the axis of the punch portion.
an elevating mechanism for elevating the punch plate between a standby position where the stripper plate is spaced upward from the surface of the die plate and a punching completion position where the tip portion of the punch portion is inserted into the hole; ,
a punching control unit that drives and controls the lifting mechanism,
The punching control section makes a second speed for returning the punch plate from the punching completion position to the standby position slower than a first speed for moving the punch plate from the standby position to the punching completion position. The elastic sheet punching device according to claim 1.
The elastic sheet punching device according to claim 1, wherein the stripper plate surface and the inner surface of the stripper plate side concave portion are rough surfaces.
A recovery mechanism for recovering the punched part punched from the elastic sheet,
The recovery mechanism includes a recovery box arranged below the die plate and communicating with the hole, an intake mechanism including an intake port communicating with the recovery box, an intake mechanism control section for driving and controlling the intake mechanism, has
2. The elastic sheet punching apparatus according to claim 1, wherein the suction mechanism control section drives the suction mechanism while the stripper plate is in contact with the die plate.
The elastic sheet punching device according to claim 1, further comprising an elastic sheet removing mechanism for blowing off the elastic sheet arranged in the die plate side concave portion from the die plate.
The elastic sheet punching device according to claim 1, wherein the elastic sheet is made of elastomer.
An elastic sheet punching device according to claim 1;
an elastic sheet conveying device that conveys the elastic sheet from a retention position where the elastic sheet is retained to the die plate side concave portion of the elastic sheet punching device;
2. The elastic sheet punching system according to claim 1, wherein the staying position is set in a temperature bath having a temperature control mechanism for adjusting the temperature inside the bath.
2. The elastic sheet punching device according to claim 1, comprising a first elastic sheet punching device and a second elastic sheet punching device, wherein the elastic sheet at a predetermined supply position is cut by the die of the first elastic sheet punching device. a first elastic sheet conveying device that supplies the die plate-side concave portion of the first die plate, which is a plate; a second elastic sheet conveying device for moving to the die plate side concave portion of the die plate,
The first punch portion, which is the punch portion of the first elastic sheet punching device, and the second punch portion, which is the punch portion of the second elastic sheet punching device, have outline shapes when viewed from the vertical direction. different from each other
The elastic sheet includes an annular product portion that becomes an annular seal material by punching, and a burr portion excluding the annular product portion,
The first elastic sheet punching device punches an inner burr portion inside the annular product portion of the burr portion with the first punch portion,
The elastic sheet punching system, wherein the second elastic sheet punching device punches the annular product portion with the second punch portion.
The first elastic sheet conveying device includes: a first suction unit including a first suction surface and a first suction port provided on the first suction surface; a first suction mechanism communicating with the first suction port; a first adsorption section moving mechanism for moving a first adsorption section; and a first transfer control section for driving and controlling the first suction mechanism and the first adsorption section movement mechanism;
The first transport control unit causes the first suction surface to face the elastic sheet at the predetermined supply position with a gap, and drives the first suction mechanism to cause the first suction surface to face the elastic sheet. The first suction mechanism is stopped by sucking a sheet and moving the first suction section to dispose the first suction surface above the die plate side concave portion of the first die plate. 16. The elastic sheet punching system of claim 15.
The burr portion includes a frame-shaped burr portion provided over the entire circumference along the outer peripheral edge of the elastic sheet,
The annular product portion is located on the inner peripheral side of the frame-shaped burr portion,
The second elastic sheet conveying device includes: a second suction unit including a second suction surface and a second suction port provided on the second suction surface; a second suction mechanism communicating with the second suction port; a second suction unit moving mechanism that moves a second suction unit; and a second transport control unit that drives and controls the second suction mechanism and the second suction unit moving mechanism,
The second transport control unit drives the second suction mechanism by causing the second suction surface to face the elastic sheet arranged in the die plate side concave portion of the first die plate with a gap therebetween. The elastic sheet is adsorbed on the second adsorption surface, the second adsorption portion is moved to position the second adsorption surface above the die plate side concave portion of the second die plate, and then the second adsorption surface is moved. Stop the intake mechanism,
17. The elastic sheet punching system according to claim 16, wherein the second suction port is provided in a frame-shaped opposing region facing the frame-shaped burr portion on the second attracting surface.