JP2018126809A - Slicing method of resin molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slicing method by which a sliced piece of a resin molding can be obtained with a high yield.SOLUTION: A slicing method of a resin molding includes: a process in which a resin molding is held by a holding tool so that a part of the resin molding protrudes downward than a lower end of the holding tool; a process of relatively moving the resin molding held by the holding tool with respect to a slice blade and slicing the resin molding protruding from the lower end of the holding tool one or more times; a process of arranging the resin molding, which is partially sliced and held by the holding tool, in an extrusion start position; a process of pushing the resin molding held by the holding tool downward and extruding a part of the resin molding downward than the lower end of the holding tool; and a process of relatively moving the resin molding held by the holding tool with respect to the slice blade, and slicing the resin molding protruding from the lower end of the holding tool one or more times.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for slicing a resin molded body, and more particularly to a slicing method capable of obtaining a sliced piece of a resin molded body with a high yield.

  Conventionally, as a method of manufacturing various sheet materials such as a heat conductive sheet and a conductive sheet, a method of slicing a resin formed body to obtain a sheet made of sliced pieces of the resin molded body has been used.

  Specifically, in Patent Document 1, for example, a composite material including a resin and graphite particles is formed into a sheet shape to obtain a primary sheet in which graphite particles are oriented in the in-plane direction, and then the obtained primary sheet is laminated. By slicing the resin molded body made of the laminated body obtained in this way in the laminating direction, a heat conductive sheet having excellent thermal conductivity in the thickness direction is manufactured.

  Moreover, as an apparatus for slicing a resin molded body formed using a composite material, a slider mechanism that slides while pressing the resin molded body against the slide surface while holding the side surface of the resin molded body, and a protrusion protruding from the slide surface A slicing device including a blade is used (see, for example, Patent Document 2).

JP 2010-132856 A JP 2011-218504 A

  Here, in manufacture of the sheet | seat which consists of a slice piece of a resin molding, obtaining the slice piece of a resin molding with a high yield is calculated | required.

  However, the yield of the resin molded body slicing method using the conventional slicing apparatus cannot be sufficiently increased. Specifically, since the conventional slicing apparatus cannot slice the resin molded body portion gripped by the slider mechanism, the resin gripped by the slide mechanism in order to grip and slice the resin molded body firmly When the proportion of the molded body portion was increased, the yield could not be sufficiently increased. In addition, in the conventional slicing apparatus, if the ratio of the resin molded body part gripped by the slide mechanism is decreased in order to increase the slicable part of the resin molded body, the resin molded body part that is not gripped is deformed during slicing. As a result, the yield could not be increased sufficiently.

  Then, an object of this invention is to provide the slicing method which can obtain the slice piece of a resin molding at a high yield.

  An object of the present invention is to advantageously solve the above-described problems, and the resin molding body slicing method of the present invention is a resin molding which slices a resin molding body held by a holder to obtain a sliced piece. A method of slicing a body, wherein the holder has a clamping surface that abuts a side peripheral surface of the resin molded body and clamps the resin molded body, and a part of the resin molded body is a lower end of the holder A step (A) of holding the resin molded body on the holder so as to protrude further downward, and disposing the resin molded body held on the holder at a slice start position; and Thereafter, a step (B) of slicing the resin molded body protruding from the lower end of the holder by moving the resin molded body held by the holder relative to the slicing blade at least once, and the step (B) ) Followed by a slice and After the step (C) of placing the resin molded body held by the holder at the extrusion start position and the step (C), the resin molded body held by the holder is pressed downward. After the step (D) of extruding a part of the resin molded body below the lower end of the holder and the step (D), the resin molded body held by the holder is placed at the slice start position. And (E) slicing the resin molded body held by the holder relative to the slicing blade and slicing the resin molded body protruding from the lower end of the holder one or more times. To do. Thus, if a process (C) and a process (D) are implemented after implementation of a process (A) and a process (B), the resin molded object part currently hold | maintained at the holder will be sliced by a process (E). Can do. Therefore, while holding the resin molded body firmly with the holder and suppressing the resin molded body part from being deformed during slicing, the resin molded body part held by the holder is pushed out of the holder and sliced. Therefore, slice pieces can be obtained with a high yield.

Here, in the slicing method of the resin molded body of the present invention, it is preferable that the static friction coefficient of the sandwiching surface is 0.1 or more and 1.1 or less. This is because if the static friction coefficient of the sandwiching surface is within the above range, the holding performance of the resin molded body and the extrudability of the resin molded body in the step (D) can be compatible at a high level.
In the present invention, the “static friction coefficient” can be measured in accordance with JIS K7125.

  In the slicing method of the resin molded body of the present invention, in the step (D), an external force of 100 N or more and 10000 N or less is applied to the resin molded body held by the holder so that the resin molded body faces downward. It is preferable to press. This is because if the magnitude of the external force applied to the resin molded body in the step (D) is within the above range, the resin molded body can be extruded well.

  Furthermore, in the slicing method of the resin molded body of the present invention, in the step (D), the resin molded body can be pressed through a pressing tool placed on the resin molded body held by the holding tool. preferable. If the resin molded body is pressed through the pushing tool, the resin molded body is prevented from coming into direct contact with the extrusion mechanism such as a rod used for extruding the resin molded body and the resin molded body is prevented from coming into direct contact. This is because it can be prevented.

  In addition, when using a pushing tool, in the slicing method of the resin molding of this invention, the said pushing tool is carried out on the resin molding currently hold | maintained at the said holding tool at least said process (B)-(E). It is preferable to perform in the state which mounted. If the steps (B) to (E) are performed in a state where the pressing tool is placed on the resin molded body held by the holding tool, slicing is performed while pushing the resin molded body downward by the weight of the pressing tool. This is because the resin molded body can be sliced more satisfactorily.

  Moreover, when using a pressing tool, in the resin molding object slicing method of the present invention, the pressing tool has an adhesive layer for fixing the resin molding to the pressing tool on the lower surface, and at least the step (D). It is preferable to perform the step (E) in a state where the resin molded body is fixed to the pushing tool through the adhesive layer. If the step (D) and the step (E) are performed in a state where the resin molded body is fixed to the pushing tool, the ratio of the resin molded body portion held by the holder by the extrusion of the resin molded body in the step (D) is This is because the resin molded body can be satisfactorily sliced even when the number is reduced.

  According to the slicing method of a resin molded body of the present invention, a slice of the resin molded body can be obtained with a high yield.

It is a figure explaining the process of slicing a resin molding according to an example of the slicing method of the resin molding of this invention. It is a figure which shows the structure of an example of the holder which can be used when slicing a resin molding, (a) is a front view of a holder, (b) is a top view of a holder. It is a figure which shows the structure of the other example of the holder which can be used when slicing a resin molding, (a) is a front view, (b) is a side view, (c) is a top view. is there. It is a front view of another example of the holder which can be used when slicing a resin molding. It is a front view of another example of the holder which can be used when slicing a resin molding. It is a front view of an example of the pushing tool which can be used in the slice method of the resin molding of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, what attached | subjected the same code | symbol in each figure shall show the same component. Further, the present invention is not limited to the embodiments shown below.

(Slicing method)
The method for slicing a resin molded body of the present invention is used when slicing a resin molded body held by a holder to obtain a slice piece. Specifically, the slicing method of the resin molded body of the present invention is performed by slicing the resin molded body held by a holding tool having a clamping surface that is in contact with the side peripheral surface of the resin molded body and clamps the resin molded body. Used when obtaining slice pieces.

  And the slicing method of the resin molded body of the present invention includes the step (A) of holding the resin molded body on the holder and placing it at the slice start position, and slicing the resin molded body held on the holder one or more times. The step (B) of performing, the step (C) of arranging the resin molded body sliced in the step (B) at the extrusion start position while being held by the holder, and the resin molded body held by the holder A step (D) of pushing the resin downward, and a step (E) of placing the resin molded body held by the holder at the slicing start position and slicing the resin molded body held by the holder one or more times. It is characterized by carrying out sequentially. Thus, if the step (C) and the step (D) are performed after the step (A) and the step (B) are performed, the resin molded body portion held by the holder during the step (B) is performed. Can be sliced in step (E). Therefore, according to the slicing method of the resin molded body of the present invention, the resin molded body is firmly held by the holder and the resin molded body portion is held by the holder while suppressing deformation of the resin molded body portion during slicing. The resin molded body portion can be extruded from the holder and sliced. As a result, slice pieces can be obtained with a high yield.

  In the method for slicing a resin molded body of the present invention, after the step (E) is performed, the sliced resin molded body is placed at the extrusion start position while being held by the holder, and is held by the holder. A step of extruding the resin molded body being pressed downward, a step of placing the resin molded body held by the holder at the slicing start position, and a step of slicing the resin molded body held by the holder one or more times You may repeat in order. This is because the sliced piece of the resin molded body can be obtained at a higher yield if the operation of extruding and slicing the resin molded body portion held by the holder in the immediately preceding slicing step from the holder is repeated.

<Resin molding>
Here, the resin molded body sliced by the method of slicing the resin molded body of the present invention is not particularly limited, and examples thereof include a resin molded body obtained by molding a resin-containing material by an arbitrary method. .
In addition, the shape of a resin molding is not specifically limited, It can be set as the shape according to the use of the slice piece obtained. Among them, the resin molded body is preferably a columnar shape such as a columnar shape or a polygonal columnar shape, and more preferably a quadrangular columnar shape.

And as a material used for shaping | molding of a resin molding, the material according to the use of the slice piece obtained can be used. Especially, as a material used for shaping | molding of a resin molding, it is preferable to use the composite material which contains resin and an inorganic filler, and also further contains the additive. This is because if a composite material containing an inorganic filler is used, various performances according to the kind of the inorganic filler such as strength, thermal conductivity, and conductivity can be imparted to the slice piece to be obtained.
In addition, as said resin, it is not specifically limited, For example, an acrylic resin, an epoxy resin, a silicone resin, a fluororesin etc. are mentioned. In addition, the inorganic filler is not particularly limited, and examples thereof include carbon materials, boron nitride, aluminum nitride, and titanium oxide. Furthermore, as said additive, it is not specifically limited, For example, a flame retardant, a plasticizer, a toughness improving agent, a hygroscopic agent, an adhesive force improving agent, a wettability improving agent, an ion trap agent etc. are mentioned.

Among the above, when the obtained sliced piece is used as a heat conductive sheet, the resin molded body includes a composite material including a resin and a carbon material as an inorganic filler, and optionally further containing an additive. A resin molded body obtained by molding is preferred.
Examples of the carbon material include particulate carbon materials (eg, artificial graphite, flaky graphite, exfoliated graphite, natural graphite, acid-treated graphite, expansive graphite, expanded graphite, etc .; carbon black; etc.) and It is preferable to use at least one of fibrous carbon materials (for example, carbon nanotubes, vapor-grown carbon fibers, carbon fibers obtained by carbonizing organic fibers, and cut products thereof), and at least a particulate carbon material is used. It is more preferable to use both a particulate carbon material and a fibrous carbon material.
In addition, as a method of forming the resin molded body, the composite material is pressurized and molded into a sheet shape, and after obtaining a pre-heat conduction sheet, a plurality of the obtained pre-heat conduction sheets are laminated in the thickness direction. Or the method of obtaining the resin molding which consists of a laminated body of a pre heat conductive sheet by folding or winding the obtained pre heat conductive sheet is preferable.

<Holding tool>
As the holder, a holder having a clamping surface that abuts the side peripheral surface of the resin molded body and clamps the resin molded body is used. That is, the holding tool can be supported without contacting the surface (side peripheral surface) other than the upper surface and the lower surface of the resin molded body without dropping the resin molded body by its own weight, and is predetermined in the step (D) or the like. When the above external force is applied, a holder that can push the resin molded body held by the holder downward is used. In this way, if a holding tool having a clamping surface that abuts the side peripheral surface of the resin molding and sandwiches the resin molding is used, the resin molding is securely held by the clamping surface of the holder. It can suppress that a part deform | transforms during a slice. Moreover, the resin molded body part currently hold | maintained at the holder by extruding the resin molded body below can be extruded from a holder, and can be sliced.

Specifically, as the holding tool, for example, a pair of clamping surfaces for holding the resin molded body in contact with the side peripheral surface of the resin molded body and a resin molded body held by the holding tool (D ) Etc., a jig having an upper opening for inserting a pushing tool or the like used for extruding downward, and a lower opening from which a part of the resin molded body (part to be sliced) protrudes can be used. More specifically, the holder is not particularly limited, and examples thereof include a holder 20 shown in FIG. 2 and a holder 20A shown in FIG.
In addition, from a viewpoint of improving the ease of attachment of the resin molded body, the holder may be formed so as to be divided and coupled using an arbitrary fastening mechanism such as a screw hole and a screw. This is because if the holder is composed of a plurality of parts, the resin molded body can be easily attached by joining the parts in a state where the resin molded body is arranged. Further, from the viewpoint of facilitating gripping of the holder using a gripping device such as a chuck mechanism using a cylinder, a flange may be provided at the upper end of the holder. This is because if the flange is provided, the holder can be securely gripped by preventing the holder from sliding down when the holder is gripped by the gripping device.

Here, the holder 20 whose front view is shown in FIG. 2 (a) and whose top view is shown in FIG. 2 (b) has a shape corresponding to the shape of the resin molded body, and the inner peripheral surface becomes the clamping surface. It consists of a cylindrical body. Specifically, in the example shown in FIG. 2, the holder 20 is formed of a rectangular cylindrical body having two pairs of sandwiching surfaces 21 facing each other, and is used for holding a square columnar resin molded body. For example, as illustrated in FIG. 1A, the resin molded body 10 is attached to the holder 20 so that a part of the resin molded body 10 protrudes from the lower opening. Further, the pusher 30 is arbitrarily inserted into the upper opening of the holder 20.
From the viewpoint of improving the ease of mounting the resin molded body, the holder 20 made of a cylindrical body has a part of the side wall (for example, the side wall positioned on the lower side in FIG. 2B) removed and re-mounted. You may form so that coupling | bonding is possible. Further, from the viewpoint of facilitating gripping of the holder 20 using a gripping device such as a chuck mechanism using a cylinder, a flange may be provided on the upper end portion of the side wall of the holder 20.

3A shows a front view, FIG. 3B shows a side view, and FIG. 3C shows a top view, and a holder 20A includes a pair of side walls disposed opposite to each other, In the illustrated example, the side walls are provided with a pair of rod-like connecting portions that are connected at the top. And in 20 A of holders, the opposing surface of a pair of side wall turns into the clamping surface 21, and the resin molding 10 is attached to 20 A of holders so that a part of resin molding 10 may protrude from lower opening. Further, the pusher 30 is arbitrarily inserted into the upper opening of the holder 20.
Similar to the holder 20 shown in FIG. 2, the holder 20 </ b> A may be formed such that a part of the side wall (for example, the side wall located on the right side in FIG. 3B) can be removed and recombined. . Moreover, the flange may be provided in the upper end part of the side wall of the holder 20A. Furthermore, in the holder 20A, the shape of the connecting portion that connects the side walls is not limited to a rod shape, and may be an arbitrary shape such as a plate shape. In addition, in the holding tool 20A, the arrangement position of the connection part that connects the side walls is not limited to the upper part, and the connection part may be provided in the center part or the lower part of the holding tool 20A in the height direction. Good.

  Here, in FIG. 2 and FIG. 3, the side wall has a smooth plate shape and the holding surface 21 is a smooth surface. However, the shape of the holder is not limited to the above-described shape. Specifically, for example, as shown in FIGS. 4 and 5, openings 22 </ b> B and 22 </ b> C may be provided on the side wall and the holding surface of the holder.

  And the static friction coefficient of the clamping surface of a holder is preferably 0.1 or more, more preferably 0.3 or more, preferably 1.1 or less, and 0.7 or less. Is more preferable. If the static friction coefficient of the clamping surface is not less than the above lower limit value, the holding performance of the resin molded body can be sufficiently enhanced. Moreover, if the static friction coefficient of a clamping surface is below the said upper limit, the extrusion property of the resin molding in a process (D) can fully be improved. Accordingly, it is possible to prevent the resin molded body from being extruded obliquely in the step (D), and to slice the uniformly extruded resin molded body in the step (E), thereby obtaining a slice piece having excellent surface accuracy. be able to.

<Pushing tool>
In addition, when pushing out the resin molding hold | maintained at the holder as above-mentioned, a pushing tool can be used. And as a pushing tool which can be used arbitrarily in a process (D) etc., it is not limited in particular, It can insert in a holder and it extrudes a resin fabrication object supported in a holder. A member having a possible length can be used. If the pushing tool is used, it is possible to prevent an extrusion mechanism such as a rod used for extrusion of the resin molded body from directly contacting the resin molded body, and to prevent the resin molded body from sticking to the extrusion mechanism.

Specifically, the pushing tool is not particularly limited, and for example, the pushing tool 30 shown in FIG. 6 can be used.
Here, the pushing tool 30 shown in FIG. 6 has a columnar part 31 inserted into the holder and a flange 32 provided on the upper part of the columnar part 31. And the columnar part 31 of the pushing tool 30 has a length equal to the side wall of the holder, for example, and the flange 32 engages with the upper end of the holder in a state where the columnar part 31 is entirely inserted into the holder. To do.

  In addition, it is preferable to provide the adhesive layer which fixes a resin molding to a pressing tool in the lower surface of a pressing tool. That is, in the pushing tool 30 shown in FIG. 6, it is preferable to provide an adhesive layer on the bottom surface of the columnar portion 31. If an adhesive layer is provided on the lower surface of the pushing tool, the resin molded body can be sliced well even when the proportion of the resin molded body part held by the holding tool decreases due to the extrusion of the resin molded body. Can do.

<Process (A)>
And in the step (A) of the slicing method of the resin molded body of the present invention, the resin molded body is held by the holder so that a part of the resin molded body protrudes below the lower end of the holder, The held resin molding is arranged at the slice start position. Specifically, for example, as shown in FIG. 1A, the resin molded body 10 is held by the holder 20 so that a part of the resin molded body 10 protrudes below the lower end of the holder 20. Optionally, the pushing tool 30 is placed on the resin molded body 10 held by the holding tool 20. Then, the resin molded body 10 is lowered together with the holder 20, and the resin molded body 10 held by the holder 20 is arranged at a slice start position on the slide surface 40 on which the slice blade 50 is installed.
In addition, in the steps (A) to (E) described in detail below, the movement and slicing of the resin molded body held by the holder may be performed manually, or a chuck that holds the holder A slicing apparatus (for example, a product name “Super-finished plane super mechanism S” manufactured by Marunaka Steel Co., Ltd., etc.) having a mechanism and a slide mechanism for moving the held holder may be used. Further, the resin molded body 10 held by the holder 20 may be arranged at the slice start position and at the extrusion start position by moving the slide surface 40 on which the slice blade 50 is installed.

  Here, when the resin molded body is composed of a laminate of a plurality of sheets, in the step (A), the resin molded body is used as a holder so that both sides in the stacking direction of the resin molded body are sandwiched by the sandwiching surfaces of the holder It is preferable to hold. A resin molded body composed of a laminate of a plurality of sheets is likely to peel off between sheets and easily deforms during slicing. However, if both sides in the laminating direction are clamped by the clamping surfaces of the holder, the resin molded body is sliced. Can be sufficiently suppressed from deforming.

  In addition, the length of the resin molded body that protrudes downward from the lower end of the holder is not particularly limited, and is preferably 0.5 mm or more and 30 mm or less, for example. If the length of the resin molded body protruding from the lower end of the holder is set to the upper limit value or less, the resin molded body can be sufficiently prevented from being deformed during slicing. Further, if the length of the resin molded body protruding from the lower end of the holder is equal to or more than the lower limit value, a sufficient amount of the resin molded body can be sliced in the step (B), and the slice piece can be efficiently obtained. Can be obtained.

<Process (B)>
Next, in the step (B), the resin molded body held by the holder is moved relative to the slicing blade, and the resin molded body protruding from the lower end of the holder is sliced one or more times. Specifically, for example, as shown in FIG. 1B, the resin molded body 10 held by the holder 20 on the slide surface 40 is slid leftward in the illustrated example and protrudes from the lower end of the holder 20. The operation of slicing the resin molded body 10 is performed once or more.

  In addition, the frequency | count of slicing a resin molding can be made into arbitrary frequency in the range which a holder does not contact a slice blade. The slicing of the resin molded body may be performed by moving the resin molded body held by the holder with the position of the slicing blade fixed, or the resin molded body held by the holder may be sliced. You may carry out by moving a slice blade in the state where the position was fixed, and you may carry out by moving both the slice blade and the resin molding currently hold | maintained at the holder. Further, the slicing of the resin molded body may be performed while pressing the resin molded body against the slide surface with a force that does not push the resin molded body from the holder.

  In the step (B), since the resin molded body firmly held by the holder can be sliced, the sliced piece is removed while suppressing the resin molded body portion protruding from the holder from being deformed during slicing. Can be obtained.

  In the step (B), as shown in FIG. 1B, the resin molded body 10 is sliced in a state where the pressing tool 30 is placed on the resin molded body 10 held by the holder 20. Is preferred. If the resin molded body 10 is sliced in a state where the pushing tool 30 is placed, the resin molded body 10 can be sliced while pushing the resin molded body 10 downward by its own weight, so that the resin molded body 10 can be sliced more satisfactorily. can do. Therefore, a slice piece with excellent surface accuracy can be obtained.

<Process (C)>
Thereafter, in the step (C), the resin molded body partly sliced in the step (B) is arranged at the extrusion start position while being held by the holder. Specifically, for example, as shown in FIG. 1C, the resin molded body 10 that is partially sliced and held by the holder 20 is lifted upward and disposed at the extrusion start position.

<Process (D)>
Next, in step (D), at the extrusion start position, the resin molded body held by the holder is pressed downward to push a part of the resin molded body downward from the lower end of the holder. Specifically, for example, as shown in FIG. 1 (d), an external force F is applied to the resin molded body 10 held by the holder 20 from above via a pusher 30, thereby The portion is pushed out below the lower end of the holder 20.

  Here, the length of the resin molded body that protrudes downward from the lower end of the holder is preferably set to, for example, 0.5 mm or more and 30 mm or less for the same reason as in the step (A).

  Further, the magnitude of the external force applied to the resin molded body in the step (D) is preferably 100 N or more, more preferably 1000 N or more, preferably 10,000 N or less, and more preferably 5000 N or less. preferable. If the magnitude of the external force applied to the resin molded body in step (D) is greater than or equal to the above lower limit value, it is possible to cause an extrusion failure such as the resin molded body being extruded obliquely due to friction between the resin molded body and the holder. It can suppress and can extrude a resin molded object favorably. As a result, a slice piece having excellent surface accuracy can be obtained in the next step (E). Moreover, if the magnitude | size of the external force added to a resin molded object in a process (D) shall be below the said upper limit, it will suppress that a resin molded object is extruded too much, and resin in a slice in the following process (E) It is possible to sufficiently suppress the deformation of the molded body.

  In the step (D), the resin molded body may be extruded without using the pushing tool, but the resin molded body sticks to the extrusion mechanism when the resin molded body and the extrusion mechanism are brought into direct contact with each other. From the viewpoint of prevention, it is preferable to use a pushing tool.

  In the step (D), the amount of the resin molded body to be extruded may be adjusted using the slide surface. Specifically, in step (D), the position where the distance between the lower end of the holder and the slide surface is equal to the length of the resin molded body to be protruded from the lower end of the holder is set as the extrusion start position, and the slide surface You may adjust the amount which extrudes a resin molding by extruding a resin molding until it contact | abuts. Thus, if the slide surface is used, the amount of extrusion of the resin molded body can be reliably adjusted.

Furthermore, in the method for slicing a resin molded body of the present invention, the extruded state of the resin molded body may be confirmed after performing the step (D) and before performing the step (E). Specifically, the extruded state of the resin molded body may be confirmed using a mechanism that detects whether the resin molded body is extruded obliquely. And when the resin molding is extruded diagonally, it is preferable to correct the extruded state so that the resin molded body is pushed straight. This is because, when the next step (E) is performed in a state where the resin molded body is extruded obliquely, the surface accuracy of the obtained slice piece is lowered.
In addition, it does not specifically limit as a mechanism which detects whether the resin molding is extruded diagonally, For example, a pressure-sensitive sensor which detects whether the whole bottom face of a resin molding contacts a surface uniformly; Resin And a sliced surface formed of a transparent member capable of visually confirming whether or not the entire bottom surface of the molded body is in surface contact; a mark such as a scale disposed on the side surface of the pushing tool;

<Process (E)>
Thereafter, in the step (E), the resin molded body extruded in the step (D) is arranged at the slice start position together with the holder, and the resin molded body held by the holder is moved relative to the slice blade and held. Slice the resin molded body protruding from the lower end of the tool one or more times. Specifically, for example, as shown in FIG. 1 (e), after the resin molded body 10 held by the holder 20 is moved to the slice start position on the slide surface 40, the holder is moved on the slide surface 40. In the illustrated example, the resin molded body 10 held by 20 is slid in the left direction and the operation of slicing the resin molded body 10 protruding from the lower end of the holder 20 is performed one or more times.

  In addition, similarly to the step (B), the number of times of slicing the resin molded body can be set to an arbitrary number as long as the holder does not contact the slicing blade. The slicing of the resin molded body may be performed by moving the resin molded body held by the holder with the position of the slicing blade fixed, or the resin molded body held by the holder may be sliced. You may carry out by moving a slice blade in the state where the position was fixed, and you may carry out by moving both the slice blade and the resin molding currently hold | maintained at the holder. Further, the slicing of the resin molded body may be performed while pressing the resin molded body against the slide surface with a force that does not push the resin molded body from the holder.

  In the step (E), since the resin molded body firmly held by the holder can be sliced, the sliced piece can be formed while suppressing the resin molded body portion protruding from the holder from being deformed during slicing. Can be obtained. Moreover, in the step (E), since the resin molded body portion held by the holder can be sliced during the implementation of the step (B), a slice of the resin molded body can be obtained with a high yield. .

  In step (E), as shown in FIG. 1 (e), the resin molded body 10 is sliced with the pushing tool 30 placed on the resin molded body 10 held by the holder 20. Is preferred. If the resin molded body 10 is sliced in a state where the pushing tool 30 is placed, the resin molded body 10 can be sliced while pushing the resin molded body 10 downward by its own weight, so that the resin molded body 10 can be sliced more satisfactorily. can do. Therefore, a slice piece with excellent surface accuracy can be obtained.

  In the step (E), it is more preferable to perform slicing in a state where the resin molded body is fixed to the lower surface of the pushing tool using an adhesive layer or the like. If slicing is performed with the resin molded body fixed to the lower surface of the pushing tool, the ratio of the resin molded body portion held by the holding tool is reduced due to the extrusion of the resin molded body in the step (D). However, the resin molded body can be satisfactorily sliced. As a result, slice pieces of the resin molded body can be obtained with a higher yield.

<Subsequent steps>
In the method for slicing a resin molded body of the present invention, after the step (E), the same operations as those in the steps (C) to (E) described above may be sequentially repeated. If the operation of extruding and slicing the resin molded body portion held by the holder in the immediately preceding slicing step from the holder is repeated, for example, as shown in FIG. 1 (f), the resin molded body 10 is further extruded. Can be sliced. As a result, a slice of the resin molded body can be obtained with a higher yield.

EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, this invention is not limited to these Examples.
In Examples and Comparative Examples, the static friction coefficient and the yield of the holding surface of the holder were measured and evaluated using the following methods, respectively.

<Static friction coefficient>
The static friction coefficient was measured in accordance with JIS K7125 using a small tabletop testing machine (trade name “FGS-500TV” manufactured by Nidec Symposium). Specifically, an aluminum plate was used as the counterpart material, and the average value of the values measured three times was defined as the static friction coefficient.
<Yield>
Slicing is performed until the surface accuracy of the heat conductive sheet (slice piece) is 20 μm or more, or until the length of the resin molded body is equal to or shorter than the protruding length of the slice blade from the slide surface, and the resin molded body before and after slicing The yield was calculated according to the following formula from the length of:
Yield (%) = {(length of resin molded body before slicing−length of resin molded body after slicing) / length of resin molded body before slicing} × 100
“Surface accuracy” is obtained by measuring the thickness (5 corners and center) of the obtained heat conductive sheet with a film thickness meter (trade name “Digimatic Indicator ID-C112XBS” manufactured by Mitutoyo). The standard deviation value of the thickness of the heat conductive sheet.

Example 1
<Manufacture of resin molding>
0.1 parts by mass of carbon nanotubes (CNT) prepared using the super-growth method and 50 parts by mass of expanded graphite (manufactured by Ito Graphite Industries Co., Ltd., trade name “EC-100”, average particle size: 190 μm) And a composition obtained by mixing 100 parts by mass of a thermoplastic fluororesin that is liquid at room temperature (Daikin Kogyo Co., Ltd., trade name “DAIEL G-101”), a Wonder Crush Mill (Osaka Chemical Co., Ltd., product) Name “D3V-10”) and crushed for 1 minute.
Next, 5 g of the crushed composition was sandwiched between polyethylene terephthalate films having a thickness of 50 μm that had been subjected to sand blasting, and the roll gap was 550 μm, the roll temperature was 50 ° C., the roll linear pressure was 50 kg / cm, and the roll speed was 1 m / min. Roll forming was performed to obtain a composite material sheet having a thickness of 500 μm. Then, the obtained composite material sheet was cut into 6 cm × 6 cm × 500 μm, 120 sheets were laminated in the thickness direction, pressed under a pressure of 0.1 MPa at a temperature of 120 ° C. for 3 minutes, and subjected to thermocompression bonding. A 6 cm square columnar laminate (resin molding) was obtained.
<Slice of molded resin>
A square cylindrical body having an inner peripheral dimension equal to the outer peripheral dimension of the resin molded body was prepared, and a 75 μm-thick polyethylene terephthalate (PET) film (Toray Industries, Inc.) was subjected to release treatment on the inner peripheral surface of the prepared rectangular cylindrical body. A product made by film processing, trade name “Therapy BX8”, coefficient of static friction: 0.1) was attached with a double-sided tape to obtain a holder.
Next, on the inner peripheral surface side of the holder, the resin molded body is placed so that the lamination direction of the resin molded body is orthogonal to the axis of the holder and the resin molded body protrudes 5 mm from the lower end of the holder. I set it. Then, the resin molded body portion that protrudes from the holder (5 times) and the resin molded body that is held by the holder by applying an external force of 1000 N from the upper side to the lower side from the lower end of the holder Extrusion was carried out alternately and so as to protrude 5 mm, thereby obtaining a heat conductive sheet (slice piece) having a length of 6 cm, a width of 6 cm, and a thickness of 150 μm.
The slicing was performed using a woodworking slicer (manufactured by Marunaka Co., Ltd., trade name “Super-finished plane board super mechanism S”) while pressing the resin molded body against the slide surface with a pressure of 0.1 MPa. Here, the slicing direction is an angle of 0 degrees with respect to the resin molding lamination direction, and the knife of the woodworking slicer has two single blades in contact with each other on the opposite side of the cutting blade, and the cutting edge of the front blade A two-blade one having a leading edge of 0.10 mm higher than the leading edge of the blade edge of the back blade, a projection length of 0.16 mm from the slit portion, and a blade angle of 21 ° of the front blade was used. Moreover, extrusion of the resin molding was performed using a pushing tool as shown in FIG. 6, and the pushing tool was placed on the resin molding during slicing as shown in FIG.
Then, the yield was evaluated. The results are shown in Table 1.

(Example 2)
The same as in Example 1 except that the film attached to the inner peripheral surface of the rectangular cylindrical body was changed to a 75 μm-thick slightly adhesive film (trade name “Somatack WA”, static friction coefficient: 0.6, manufactured by Somaru Corporation). Thus, the resin molded body was manufactured and the resin molded body was sliced. Then, the yield was evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 3)
A polyethylene terephthalate (PET) film having a thickness of 75 μm having a release treatment applied to the opposing surface of a member having a shape as shown in FIG. 3 (product name “Therapyl BX8”, static friction coefficient: 0.1) The resin molded body was manufactured and the resin molded body was sliced in the same manner as in Example 1 except that the tape was attached with a double-sided tape as a holder. Then, the yield was evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 1)
The resin molded body was manufactured and sliced in the same manner as in Example 1 except that an L-shaped holding tool with no clamping surface was used, but the resin molding was performed during the slide. The body was detached from the holder, and the resin molded body could not be sliced.

(Comparative Example 2)
Use a holder that covers part of the upper and side surfaces of the resin molded body, set the resin molded body on the holder so that the resin molded body protrudes 30 mm from the lower end of the holder, and do not extrude the resin molded body The resin molded body was produced and the resin molded body was sliced in the same manner as in Example 1 except that the slicing was performed. Then, the yield was evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 3)
Use a holder that covers part of the upper and side surfaces of the resin molded body, set the resin molded body on the holder so that the resin molded body protrudes 40 mm from the lower end of the holder, and do not extrude the resin molded body The resin molded body was manufactured and the resin molded body was sliced in the same manner as in Example 1 except that slicing was performed. However, the resin molded body was deformed in the middle of slicing, and the surface accuracy of the slice piece was 20 μm or more. The slice was interrupted because it worsened. Then, the yield was evaluated in the same manner as in Example 1. The results are shown in Table 1.

  From Table 1, in Examples 1-3, it turns out that the slice piece of a resin molding is obtained with a high yield. On the other hand, it can be seen from Table 1 that in Comparative Example 1, the resin molded body cannot be sliced, and in Comparative Example 2, the holder becomes an obstacle to slicing and the yield cannot be sufficiently increased. Moreover, in the comparative example 3, it turns out that a yield cannot fully be raised by deformation | transformation of a resin molding.

  According to the present invention, it is possible to obtain a slice of a resin molded body with a high yield.

DESCRIPTION OF SYMBOLS 10 Resin molding 20 Holder 20A, 20B, 20C Holder 21 Clamping surface 22B, 22C Opening 30 Pusher 31 Column-shaped part 32 Flange 40 Slide surface 50 Slice blade

Claims (6)

A method of slicing a resin molded body to obtain a slice piece by slicing a resin molded body held by a holder,
The holder has a clamping surface that abuts the side peripheral surface of the resin molded body and clamps the resin molded body,
The resin molded body is held by the holder so that a part of the resin molded body protrudes below the lower end of the holder, and the resin molded body held by the holder is arranged at the slice start position. Step (A) to perform,
After the step (A), a step (B) of slicing the resin molded body protruding from the lower end of the holder one or more times by moving the resin molded body held by the holder relative to the slicing blade When,
After the step (B), a step (C) of partially slicing and placing the resin molded body held by the holder at the extrusion start position;
After the step (C), a step (D) of pressing a resin molded body held by the holder downward and pushing a part of the resin molded body downward from a lower end of the holder;
After the step (D), the resin molded body held by the holder is placed at a slice start position, and the resin molded body held by the holder is moved relative to the slicing blade to perform the holding. A step (E) of slicing the resin molded body protruding from the lower end of the tool at least once;
A method for slicing a resin molded body.   The method for slicing a resin molded body according to claim 1, wherein a static friction coefficient of the clamping surface is 0.1 or more and 1.1 or less.   3. The resin molding according to claim 1, wherein in the step (D), an external force of 100 N or more and 10000 N or less is applied to the resin molding that is held by the holder to press the resin molding downward. How to slice the body.   The resin molded body according to any one of claims 1 to 3, wherein in the step (D), the resin molded body is pressed through a pressing tool placed on the resin molded body held by the holder. Slice method.   The method for slicing a resin molded body according to claim 4, wherein at least the steps (B) to (E) are performed in a state where the pushing tool is placed on the resin molded body held by the holder. The pusher has an adhesive layer on the lower surface for fixing the resin molded body to the pusher,
The method for slicing a resin molded body according to claim 4 or 5, wherein at least the step (D) and the step (E) are performed in a state where the resin molded body is fixed to the pushing tool through the adhesive layer.

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