JP2008194950A - Roll press device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll press device which can form a large number of recessed parts simply and in a short time period, on the surface of a resin sheet. <P>SOLUTION: This roll press device can form a large number of recessed parts simply and in a short time period, on the surface of the resin sheet in the following fabrication steps: (1) first, a forming roll 1 with a plurality of projecting parts 1a formed on the cylindrical surface and a receiving roll 2 with a flat cylindrical surface, are installed in a housing in horizontally 1 parallel, (2) a roll gap between the roll 1 and the roll 2 are adjusted by displacing the roll 2 with an eccentric cam 8, (3) the resin sheet is made to pass through the roll gap by rotatively driving the roll 1 with a motor 4, and (4) the recessed parts are formed in the surface of the resin sheet by compressing the resin sheet by each projecting part 1a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a roll press apparatus that forms a plurality of recesses on the surface of a resin sheet.

  The resin sheet is formed by machining using a ball end mill or a straight end mill, such as a sliding resin sheet used for a sliding guide portion of a machine tool, on which a large number of recesses that are oil reservoirs are formed on the surface. There are some (see, for example, Patent Document 1). Usually, such a sliding resin sheet has a thickness of about 0.5 to 3.0 mm and is made of polytetrafluoroethylene resin (PTFE) containing a copper alloy.

JP 2003-213333 A

  Like the sliding resin sheet described in Patent Document 1, the method of forming a plurality of recesses on the surface of the resin sheet by machining requires time and labor to process a large number of recesses, and the manufacturing cost of the resin sheet is high. There is a very high problem.

  Then, the subject of this invention is enabling it to form many recessed parts easily on the surface of a resin sheet in a short time.

  In order to solve the above-described problems, the roll press apparatus of the present invention includes a forming roll having a plurality of protrusions provided on a cylindrical surface and a receiving roller having a flat cylindrical surface arranged in parallel, The roll gap between the roll and the receiving roll is adjusted by displacing the receiving roll with a cam relative to the forming roll, and at least the forming roll is driven to rotate, and the resin sheet is passed through the roll gap, By adopting a configuration in which a plurality of recesses are formed on the surface of the resin sheet by compression at the protrusions, a large number of recesses can be easily formed on the surface of the resin sheet in a short time.

  The reason why the molding roll is rotationally driven is to facilitate the biting of the resin sheet into the roll gap. The roll gap is adjusted in order to mold a plurality of recesses in resin sheets having different thicknesses, and to anticipate a change in the roll gap that can be easily opened by a reaction force for compression molding the plurality of recesses. Even if the hardness of the resin sheet or the area ratio of the recesses changes, the recesses are formed to a desired depth, and this roll gap is adjusted by means for displacing the receiving rolls with cams relative to the forming rolls. Easy to do.

  The protrusion has a flat front end surface, and an edge angle is formed on the outer periphery thereof, so that a part of the periphery where the concave portion of the resin sheet is molded at the edge angle of the front end surface of the protrusion And the return deformation of the formed concave portion can be reduced.

  By forming the protrusions separately and fixing them to the cylindrical surface of the forming roll, the protrusions can be easily provided on the cylindrical surface of the forming roll. The protrusion can be fixed to the cylindrical surface by bonding, screwing, press fitting, or the like.

  The protrusion may be cylindrical.

  The resin sheet may be a sliding resin sheet in which the concave portion is an oil reservoir.

  The said sliding resin sheet is suitable for what is used for the sliding guide part of a machine tool.

  In the roll press device of the present invention, a forming roll provided with a plurality of protrusions on a cylindrical surface and a receiving roller having a flat cylindrical surface are arranged in parallel, and a roll gap between these forming roll and receiving roller is set. The receiving roll is displaced with respect to the forming roll by a cam and adjusted, and at least the forming roll is driven to rotate, the resin sheet is passed through the roll gap, and the surface of the resin sheet is compressed by a plurality of protrusions. Since a plurality of recesses are formed, a large number of recesses can be easily formed on the surface of the resin sheet in a short time. In addition, by adjusting the roll gap, it is possible to form a plurality of recesses in resin sheets having different thicknesses, and in anticipation of changes in the roll gap that can be opened easily by the reaction force of compression molding the plurality of recesses, Even if the area ratio of the sheath is changed, the recess can be formed to a desired depth.

  By setting the projection to have a flat front end surface and an edge angle formed on the outer periphery thereof, it is possible to reduce the return deformation of the molded recess.

  By forming the protrusions separately and fixing them to the cylindrical surface of the forming roll, the protrusions can be easily provided on the cylindrical surface of the forming roll.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, this roll press apparatus incorporates a forming roll 1 having a plurality of protrusions 1 a on a cylindrical surface and a receiving roll 2 having a flat cylindrical surface in a housing 3 in a vertically parallel manner. A large number of recesses 21a as shown in FIG. 5 are formed on the surface of the resin sheet 21 that is passed through the roll gap between the forming roll 1 and the receiving roll 2.

  The forming roll 1 is rotationally driven by the driving force transmitted from the motor 4 and the speed reducer 5 through the pulleys 6 a and 6 b and the timing belt 7. The receiving roll 2 is rotatably supported on a shaft 2a by a bearing 2b. The shaft 2a is guided by a left and right guide plate 9 and rotated up and down by rotating left and right eccentric cams 8 by a handle 8a. The roll gap between the forming roll 1 and the receiving roll 2 is set according to the thickness and material of the resin sheet 21 and the depth and area ratio of the recess 21a to be formed. A receiving plate 10 that receives the resin sheet 21 and a side guide 11 that guides the width direction of the resin sheet 21 are provided on the inlet side and the outlet side of the roll gap.

  FIG. 3 schematically shows a process in which the recess 21a is formed on the surface of the resin sheet 21 by the protrusion 1a. The protruding portion 1a is a separate columnar member, and is fixed to the cylindrical surface by press-fitting into a hole 1b provided in the cylindrical surface of the forming roll 1, and an edge angle is formed on the outer periphery of the flat front end surface of the protruding portion 1a. Is formed.

  First, along with the rotation of the forming roll 1, as shown in FIG. 3A, the front edge angle of the projection 1 a hits the surface of the resin sheet 21, and the roll between the resin sheet 21 and the receiving roll 2. As shown in FIG. 3B, the front edge angle cuts into the surface of the resin sheet 21 as drawn into the gap. At this time, the periphery of the front side where the concave portion 21a is formed is sheared by the edge angle on the front side. When the forming roll 1 further rotates, as shown in FIG. 3C, the edge angle on the rear side of the protruding portion 1a also bites into the surface of the resin sheet 21, and the concave portion 21a is compression-molded, as shown in FIG. As shown, the front edge angle is separated from the surface of the resin sheet 21, and the resin sheet 21 is fed out to the exit side of the roll gap while the rear edge angle bites in. At this time, the periphery of the rear side where the concave portion 21a is formed is also sheared by the edge angle of the rear side that has bite in.

  For this reason, as shown in FIG. 4, the molded concave portion 21a is formed with a clear bottom corner portion by shearing due to the edge angle of the protrusion 1a, and the return deformation of the compression molded concave portion 21a is small. Become.

  The edge angle of the protrusion 1a can be easily formed by polishing the tip surface of each protrusion 1a with a cylindrical grinder in a state where the protrusion 1a is disposed on the forming roll 1. By carrying out like this, the height of all the projection parts 1a fixed to the cylindrical surface of the forming roll 1 becomes the same, and the depth of the recessed part 21a formed in the resin sheet 21 becomes uniform.

  FIG. 5 shows the surface of the resin sheet 21 on which the concave portion 21a is formed. This resin sheet 21 is a sliding resin sheet made of PTFE containing 30 to 60% by mass of a copper alloy used in a sliding guide portion of a machine tool, and has a thickness of about 0.5 to 3.0 mm. A large number of recessed portions 21a to be accumulated are densely formed with an area ratio of 40 to 60%.

  In the above-described embodiment, the protrusion of the forming roll is a separate cylindrical shape, and is fixed to the cylindrical surface by press-fitting. However, the protrusion is not limited to a cylindrical shape, and bonding, screwing, etc. Can be fixed to the cylindrical surface. Further, the protrusion can be formed integrally with the forming roll.

Partially cutaway front view showing an embodiment of a roll press device Sectional view along the line II-II in FIG. a, b, c, and d are cross-sectional views schematically showing a process of forming a recess on the surface of the resin sheet, respectively. Sectional drawing which shows typically the recessed part shape | molded in the formation process of FIG. The top view which shows the resin sheet by which the recessed part was shape | molded with the roll press apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forming roll 1a Protrusion part 1b Hole 2 Receiving roll 2a Shaft 2b Bearing 3 Housing 4 Motor 5 Reduction gear 6a, 6b Pulley 7 Timing belt 8 Eccentric cam 8a Handle 9 Guide plate 10 Receiving plate 11 Side guide 21 Resin sheet 21a Recessed part

Claims (6)

  A forming roll provided with a plurality of protrusions on a cylindrical surface and a receiving roll having a flat cylindrical surface are arranged in parallel, and a roll gap between these forming roll and receiving roll is received with respect to the forming roll. And at least the molding roll is driven to rotate, a resin sheet is passed through the roll gap, and a plurality of recesses are formed on the surface of the resin sheet by compression with the plurality of protrusions. A roll press device designed to be molded.   The roll press apparatus according to claim 1, wherein the protrusion has a flat front end surface and an edge angle is formed on an outer periphery thereof.   The roll press apparatus according to claim 1, wherein the protrusion is formed separately and is fixed to a cylindrical surface of the forming roll.   The roll press apparatus according to any one of claims 1 to 3, wherein the protrusion is cylindrical.   The roll press apparatus according to any one of claims 1 to 4, wherein the resin sheet is a sliding resin sheet having the plurality of recesses as oil reservoirs.   The roll press apparatus according to claim 5, wherein the sliding resin sheet is used for a sliding guide portion of a machine tool.

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