Tool for slicing resin molded body and method for slicing resin molded body

Abstract

To provide a new technique that can obtain sliced pieces at high yield while securing sufficient film thickness precision, in slicing a resin molding to obtain the sliced pieces.SOLUTION: A slicing jig for a resin molding comprises a holding jig which has at least a pair of gripping surfaces which grip a resin molding, a lower opening through which a portion of resin molding protrudes and an upper opening, and a push-in tool that is placed on the resin molding, where a buffer material is arranged in at least a portion of a side peripheral surface of the push-in tool and the push-in tool comprising the buffer material has a size to be stored between the pair of gripping surfaces, in a planar view from above.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tool for slicing a resin molded body, and a method for slicing a resin molded body using the slicing tool. [Background technology]

[0002] 2. Description of the Related Art Conventionally, as a method for producing various sheet materials such as thermally conductive sheets and electrically conductive sheets, a method has been used in which a resin molded body is sliced ​​to obtain a sheet made of slices of the resin molded body.

[0003] For example, Patent Document 1 employs a method of repeatedly moving a resin molded body relative to a slicing blade to obtain a sheet as sliced ​​pieces. More specifically, in Patent Document 1, a resin molded body held by a holder is moved relative to the slicing blade on the slicing surface, and the resin molded body protruding from the lower end of the holder is sliced ​​to continuously produce a sheet made of sliced ​​pieces.

[0004] Patent Document 1 proposes a method in which a pusher is placed on a resin molded body held by a holder, and the resin molded body is sliced ​​while being pressed downward by the weight of the placed pusher. In this way, the resin molded body can be well sliced ​​by slicing the resin molded body while pressing it downward (toward the slide surface) with the pusher. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-126809 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the conventional slicing method has room for improvement in obtaining sliced ​​pieces of the resin molded body with a higher yield. Specifically, in the conventional slicing method in which the resin molded body is sliced ​​while being pressed downward by a pusher, as the slicing progresses and the thickness of the resin molded body decreases, the relative position of the pusher placed on the resin molded body to the holder also decreases by the amount of the decrease in the thickness of the resin molded body. Then, at the end of the slicing process, the resin molded body is sliced ​​in a state in which the pusher, not the resin molded body, is sandwiched between a pair of clamping surfaces of the holder. At this time, it has become clear that there is a problem in that the thickness accuracy of the obtained sliced ​​pieces decreases due to the pusher swinging significantly due to the impact of slicing. Therefore, an object of the present invention is to provide a new technique for obtaining sliced ​​pieces by slicing a resin molded body, which can obtain the sliced ​​pieces with a high yield while ensuring sufficient film thickness accuracy. [Means for solving the problem]

[0007] The present invention aims to advantageously solve the above problems, and the slicing tool for a resin molded body of the present invention is a tool for slicing a resin molded body comprising a holder having at least a pair of clamping surfaces for clamping a resin molded body, a lower opening through which a part of the resin molded body protrudes, and an upper opening, and a pusher placed on the resin molded body, characterized in that a cushioning material is arranged on at least a part of the side peripheral surface of the pusher, and the pusher equipped with the cushioning material has a size that can be accommodated between the pair of clamping surfaces when viewed in a plan view from above. If the resin molded body is repeatedly moved relative to the slicing blade while being held by such a slicing tool to slice, deformation of the resin molded body during slicing is suppressed, and even if the thickness of the resin molded body decreases as slicing progresses, the cushioning material suppresses the oscillation of the pusher, and the slicing of the resin molded body can be completed while maintaining high film thickness accuracy. As a result, sliced ​​pieces with sufficient film thickness accuracy can be obtained with a high yield.

[0008] Here, in the slicing jig for a resin molded body of the present invention, when viewed from above in a plan view, it is preferable that the length of the portion of the cushioning material covering the side surface of the pushing tool occupies 80% to 100% of the side circumference of the pushing tool. If the cushioning material covers 80% to 100% of the side circumference of the pushing tool, slices with sufficient thickness accuracy can be obtained at a higher yield.

[0009] In the resin molding slicing jig of the present invention, the buffer material preferably has a static friction coefficient of 0.30 to 1.40. If the buffer material has a static friction coefficient within the above range, workability is ensured when pushing out a part of the resin molding so that it protrudes from the lower opening of the holder, and slices with sufficient film thickness accuracy can be obtained at a higher yield. In the present invention, the "static friction coefficient" of the buffer material can be measured by the method described in the examples.

[0010] Furthermore, in the slicing jig for resin molded bodies of the present invention, the apparent Young's modulus of the buffer material is preferably 0.03 GPa or more and 0.15 GPa or less. If the apparent Young's modulus of the buffer material is within the above range, sliced ​​pieces having sufficient thickness accuracy while fully absorbing the size variation of the resin molded body can be obtained at a higher yield. In the present invention, the "apparent Young's modulus" of the cushioning material can be measured by the method described in the Examples.

[0011] The present invention also aims to advantageously solve the above-mentioned problems, and the method for slicing a resin molded body of the present invention is a method for slicing a resin molded body to obtain sliced ​​pieces using any of the above-mentioned slicing tools for a resin molded body, the method comprising the steps of: (A) holding the resin molded body in a holder so that a part of the resin molded body protrudes from a lower opening of the holder, and placing the pushing tool having the cushioning material on the resin molded body to place the resin molded body held by the holder at a slicing start position; and (B) moving the resin molded body held by the holder relative to a slicing blade after the step (A) to obtain sliced ​​pieces. The method includes a step (B) of slicing the resin molded body protruding from the lower opening of the holder at least once, a step (C) of arranging the resin molded body, a part of which has been sliced ​​and is held by the holder, at an extrusion start position after the step (B), a step (D) of extruding a part of the resin molded body held by the holder below the lower opening of the holder after the step (C), and a step (E) of arranging the resin molded body held by the holder at the slicing start position after the step (D) and moving the resin molded body held by the holder relative to the slicing blade to slice the resin molded body protruding from the lower opening of the holder at least once. In this way, by carrying out steps (A) and (B) and then steps (C) and (D) using any of the above-mentioned slicing jigs, the resin molded body part held by the holder can be sliced ​​in step (E). Therefore, the resin molding is firmly held by the holder to prevent the resin molding from deforming during slicing, while the resin molding portion held by the holder is pushed out from the holder, and sliced ​​in step (E). In addition, since the slicing method of the present invention uses any of the slicing jigs described above, even if the thickness of the resin molding decreases as slicing progresses, the cushioning material prevents the pushing tool from swinging, and the slicing of the resin molding can be completed while maintaining high film thickness accuracy. As a result, sliced ​​pieces with sufficient film thickness accuracy can be obtained at a high yield. Effect of the Invention

[0012] By using the resin molding slicing jig and slicing method of the present invention, sliced ​​pieces having sufficient thickness accuracy can be obtained from the resin molding at a high yield. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 shows the configuration of an example of a slicing jig of the present invention, where (a) is a side view of the slicing jig holding a resin molding, and (b) is a plan view of the slicing jig of (a) viewed from above. [Diagram 2] 2 is a diagram illustrating a state in which a resin molded body is sliced ​​by the slicing jig of FIG. 1 and the thickness of the resin molded body is reduced as the slicing progresses. FIG. [Diagram 3] FIG. 13 is another diagram showing the configuration of an example of the slicing jig of the present invention, and is a side view of the slicing jig in a state in which a resin molded body is held. [Figure 4] FIG. 2 is a diagram showing the configuration of an example of a holder included in the slicing jig of the present invention, where (a) is a front view of the holder, and (b) is a top view of the holder. [Diagram 5] 1A to 1C are diagrams illustrating a process of slicing a resin molded body according to an example of the slicing method of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the same reference numerals in each drawing indicate the same components. Furthermore, the present invention is not limited to the embodiment described below.

[0015] The slicing jig of the present invention is used for slicing a resin molded body to obtain sliced ​​pieces. Also, the slicing method of the present invention is a method for producing sliced ​​pieces by slicing a resin molded body held by the slicing jig of the present invention.

[0016] (Resin molding) The resin molded body to be sliced ​​is not particularly limited, and may be a resin molded body obtained by molding a material containing a resin by any method. The shape of the resin molded body is not particularly limited and may be a shape according to the application of the resulting sliced ​​pieces. In particular, the resin molded body is preferably a columnar shape such as a cylindrical or polygonal columnar shape, and more preferably a square columnar shape.

[0017] The material used for molding the resin molded body can be a material according to the application of the resulting sliced ​​piece. Among them, the material used for molding the resin molded body is preferably a composite material containing a resin and an inorganic filler and optionally further containing an additive. This is because the use of a composite material containing an inorganic filler can impart various properties such as strength, thermal conductivity, and electrical conductivity to the resulting sliced ​​piece according to the type of inorganic filler. The resin is not particularly limited, and examples thereof include acrylic resin, epoxy resin, silicone resin, fluororesin, etc. The inorganic filler is not particularly limited, and examples thereof include carbon materials, boron nitride, aluminum nitride, titanium oxide, etc. Furthermore, the additive is not particularly limited, and examples thereof include flame retardants, plasticizers, toughness improvers, moisture absorbents, adhesive strength improvers, wettability improvers, ion trapping agents, etc.

[0018] Among the above, when the obtained sliced ​​pieces are used as thermally conductive sheets, the resin molding is preferably a resin molding obtained by molding a composite material containing a resin and a carbon material as an inorganic filler, and optionally further containing additives. As the carbon material, it is preferable to use at least one of a particulate carbon material (e.g., graphite such as artificial graphite, scaly graphite, exfoliated graphite, natural graphite, acid-treated graphite, expandable graphite, and expanded graphite; carbon black; etc.) and a fibrous carbon material (e.g., carbon nanotubes, vapor-grown carbon fibers, carbon fibers obtained by carbonizing organic fibers, and cut products thereof, etc.), it is more preferable to use at least a particulate carbon material, and it is even more preferable to use both a particulate carbon material and a fibrous carbon material. In addition, a preferred method for forming the resin molded body is to pressurize the composite material into a sheet to obtain a primary sheet, and then stack a plurality of the resulting primary sheets in the thickness direction, or fold or roll the resulting primary sheet to obtain a resin molded body consisting of a stack of primary sheets.

[0019] (Slicing tool) The slicing jig of the present invention used when slicing the above-mentioned resin molded body includes a holder that holds the resin molded body with at least a pair of clamping surfaces, and a pusher that is arranged on the upper surface of the resin molded body held by the holder. Here, in the slicing jig of the present invention, a cushioning material is arranged on at least a part of the side peripheral surface of the pusher, and the pusher with the cushioning material arranged thereon must be of a size that can be accommodated between the pair of clamping surfaces (the space formed between the pair of clamping surfaces) of the holder when the slicing jig is viewed in plan from above. Note that the slicing jig of the present invention may include a configuration (other configuration) other than the holder, the pusher, and the cushioning material. Examples of other configurations include a pressing mechanism that applies pressure to the pusher from above to press the pusher and the resin molded body downward.

[0020] By using the slicing tool of the present invention, the resin molded body is held by the holder and pressed against the slide surface by the pusher while being repeatedly moved relative to the slicing blade to slice the resin molded body, and deformation of the resin molded body during slicing can be suppressed. Even if the thickness of the resin molded body decreases as slicing progresses, the cushioning material located between the clamping surface and the pusher suppresses the oscillation of the pusher, and the slicing of the resin molded body can be completed while maintaining high film thickness accuracy. As a result, sliced ​​pieces with sufficient film thickness accuracy can be obtained at a high yield.

[0021] Here, FIG. 1 is a diagram showing the configuration of an example of the slicing jig of the present invention, in which (a) is a side view of the slicing jig in a state in which a resin molded body is held, and (b) is a plan view of the slicing jig in (a) viewed from above. The slicing jig 100 in FIG. 1 includes a holder 20 for holding a resin molded body 10, a pusher 30 placed on the resin molded body 10, and a cushioning material 40 arranged on the side peripheral surface of the pusher 30. Here, in the example of FIG. 1, the resin molded body 10 is in the shape of a quadrangular prism (a square shape when viewed from above), and a part of the resin molded body 10 protrudes from a lower opening 24. The holder 20 is provided with chucks 22 on all four inner peripheral surfaces thereof, and the resin molded body 10 is clamped from all four sides by the clamping surfaces 21 of the chucks 22. 1(b), in this example, when viewed from above, the cushioning material 40 has a size sufficient to fill the gap between the side peripheral surface of the pushing tool 30 and the clamping surface 21 (of the chuck 22) of the holder 20, and the pushing tool 30 equipped with the cushioning material 40 has a size sufficient to fit between at least one pair (two pairs in FIG. 1) of clamping surfaces 21. As the slicing progresses and the thickness of the resin molded body 10 decreases as shown in FIG. 2, the cushioning material 40 comes into contact with the clamping surface 21, and the pushing tool 30 is held by the holder 20 by the cushioning material 40.

[0022] 3 is another diagram showing the configuration of an example of the slicing jig of the present invention, and is a side view of the slicing jig in a state where a resin molded body is held. The slicing jig 100A in FIG. 3 includes a holder 20 for holding the resin molded body 10, a pusher 30 placed on the resin molded body 10, and a cushioning material 40 arranged on the side peripheral surface of the pusher 30, similar to the slicing jig 100 in FIG. 1. Here, the slicing jig in FIG. 3 includes a pressing mechanism 50 for pressing the pusher from above to press the pusher and the resin molded body downward. Here, the pressing mechanism 50 of the slicing jig 100A in the example in FIG. 3 includes an upper presser 51 that abuts against the pusher 30 from above, a pressure source 52 that generates pressure in the pressing direction (downward in FIG. 3), and an extendable rod 53 that connects the pressure source 52 and the upper presser 51. Downward pressure generated by pressure source 52 can be transmitted to upper presser 51 via rod 53, thereby pressing downwardly against pusher 30 and resin molded body 10. Although pressing mechanism 50 in Fig. 3 has upper presser 51, the upper presser is not essential to the pressing mechanism. For example, in pressing mechanism 50 in Fig. 3, rod 53 may be directly connected to pressing tool 40.

[0023] The holding tool, the pushing tool, the buffer material, and the pressing mechanism that constitute the slicing jig of the present invention will be described in detail below.

[0024] <Holder> The holder has a pair or more of clamping surfaces that contact the side circumferential surfaces of the resin molded body and clamp the resin molded body. That is, the holder can contact the surfaces (side circumferential surfaces) other than the upper and lower surfaces of the resin molded body to support the resin molded body without dropping it under its own weight, and can push (move) the resin molded body held by the holder downward by applying a predetermined or more external force, weakening the clamping pressure by adjusting the fastening mechanism described later, and / or adjusting the position of the chuck (chuck position) described later. In this way, if a holder having clamping surfaces that contact the side circumferential surfaces of the resin molded body and clamp the resin molded body is used, the resin molded body can be firmly held by the clamping surfaces of the holder to suppress deformation of the resin molded body part during slicing. In addition, by pushing the resin molded body downward, the resin molded body part held by the holder can be pushed out of the holder and sliced.

[0025] The holder also has a push-in tool equipped with a cushioning material, an upper opening for inserting an upper presser and a rod of an optional extrusion mechanism, and a lower opening through which a part of the resin molding (the part to be sliced) protrudes. Furthermore, from the viewpoint of increasing the ease of mounting the resin molded body, the holder may be formed so as to be separable and connectable using any fastening mechanism such as a screw hole and a screw, etc. This is because, if the holder is made up of a plurality of parts, the resin molded body can be easily mounted by connecting the parts with the resin molded body in place.

[0026] Here, the holder 20, shown in a front view in FIG. 4(a) and a top view in FIG. 4(b), has a shape corresponding to the shape of the resin molded body. Specifically, in the example shown in FIG. 4, the holder 20 is a rectangular tubular body with chucks 22 provided on all four faces (four side walls) constituting the inner circumferential surface, and has two pairs of clamping faces 21 facing each other. The holder 20 is used to hold a rectangular prism-shaped resin molded body. Then, as shown in FIG. 1, for example, the resin molded body 10 is attached to the holder 20 so that a part of the resin molded body 10 protrudes from a lower opening 24. In addition, a pusher 30 equipped with a cushioning material 40 is inserted into an upper opening 23 of the holder 20. In order to facilitate the attachment of the resin molded body, the retainer 20 made of a cylindrical body may be formed so that some of its side walls (for example, the side wall located on the lower side in FIG. 4(b)) can be detached and reattached. 1 and 4 is provided with chucks 22 on all four side walls constituting the inner peripheral surface, but chucks may be provided on some of the side walls constituting the inner peripheral surface (for example, one to three of the four side walls), or the holder may not have a chuck. In other words, the inner peripheral surface of the holder may be the clamping surface.

[0027] <Pushing tool> The pushing tool is not particularly limited, and any member that can be inserted into the above-mentioned holder while equipped with the cushioning material described below and has a length that is capable of pushing out the resin molded body supported in the holder can be used.

[0028] Here, the Young's modulus of the indenter is preferably 1.5 GPa or more, more preferably 2.5 GPa or more. If the Young's modulus of the indenter is 1.5 GPa or more, the resistance to the impact of the slice is improved. Therefore, slice pieces with sufficient film thickness accuracy can be obtained at a higher yield. The upper limit of the Young's modulus of the indenter is not particularly limited, but can be, for example, 200 GPa or less. In the present invention, the "Young's modulus" of the indentation tool can be measured using the method described in the Examples.

[0029] The material constituting the pressing tool is not particularly limited, but examples thereof include resins such as polyamide resins (e.g., nylon 6, nylon 11, nylon 12, nylon 66, nylon 610, nylon 612), ABS resins (resins obtained by copolymerizing acrylonitrile, butadiene, and styrene); and metals such as aluminum and stainless steel (e.g., SUS304, SUS430, SUS410). These may be used alone or in combination of two or more. Among these, polyamide resins are preferred from the viewpoint of obtaining slices with sufficient thickness accuracy at a higher yield.

[0030] The shape of the pusher is not particularly limited, but it is preferable that the pusher has a shape corresponding to the shape of the resin molding. When the resin molding is in the shape of a square prism, it is preferable that the pusher be in the shape of a square prism.

[0031] Furthermore, the area of ​​the lower surface (bottom surface) of the pusher is preferably 80% or more, more preferably 90% or more, and preferably 101% or less, and more preferably 100% or less, of the area of ​​the upper surface of the resin molded body taken as 100%. If the area of ​​the lower surface of the pusher is 80% or more of the 100% area of ​​the upper surface of the resin molded body, the resin molded body will not be unevenly deformed due to pressing by the pusher, and if it is 101% or less, the pusher equipped with a cushioning material will not excessively interfere with the holder and the chuck of the holder.

[0032] <Cushioning material> The cushioning material is a member disposed on at least a part of the side peripheral surface of the pushing tool described above. The cushioning material must be of a size such that the pushing tool equipped with the cushioning material can be accommodated between a pair of clamping surfaces when viewed in a plan view from above the slicing tool. By disposing such a cushioning material on the side peripheral surface of the pushing tool, it is possible to suppress the oscillation of the pushing tool at the end of the slicing stage as described above, and to complete the slicing of the resin molding while maintaining high film thickness accuracy.

[0033] Here, the buffer material is preferably large enough to fill the gap between the side peripheral surface of the pusher and the clamping surface of the holder when viewed from above (e.g., when positioned inside the holder). In other words, the pusher equipped with the buffer material is preferably large enough to fit between at least a pair of clamping surfaces. By making the buffer material and the pusher equipped with the buffer material such a size, the pusher equipped with the buffer material can be firmly held by the clamping surface at the end of slicing, and the rocking of the pusher can be further suppressed, thereby further improving the thickness accuracy of the sliced ​​pieces.

[0034] Furthermore, when the pushing tool having the cushioning material is viewed from above in a plan view, the length of the portion of the pushing tool that the cushioning material covers is preferably 80% to 100%, more preferably 98% to 100%, and even more preferably 100%, of the pushing tool's circumferential length as 100%. If the cushioning material covers 80% to 100% of the pushing tool's circumferential length, the cushioning material located between the clamping surface and the pushing tool further suppresses the pushing tool from swinging, and slices with sufficient thickness accuracy can be obtained at a higher yield.

[0035] The height of the cushioning material (width in the vertical direction) is preferably 80% to 100%, more preferably 90% to 100%, and even more preferably 100%, of the height of the pusher, which is taken as 100%. If the cushioning material covers 80% to 100% of the height of the pusher, even if the thickness of the resin molding decreases as slicing progresses, the cushioning material located between the clamping surface and the pusher further suppresses the oscillation of the pusher, and slice pieces with sufficient film thickness accuracy can be obtained at a higher yield.

[0036] Here, the static friction coefficient of the buffer material is preferably 0.30 or more, more preferably 0.50 or more, even more preferably 0.70 or more, particularly preferably 0.95 or more, preferably 1.40 or less, more preferably 1.30 or less, even more preferably 1.20 or less, and particularly preferably 1.10 or less. If the static friction coefficient of the buffer material is 0.30 or more, it is possible to prevent the pusher equipped with the buffer material from slipping off. On the other hand, if the static friction coefficient of the buffer material is 1.40 or less, when the resin molded body held by the holder is pressed downward to be pushed out so as to protrude from the lower opening of the holder, problems such as the pusher equipped with the buffer material or the resin molded body being pushed out obliquely do not occur. In other words, if the static friction coefficient of the buffer material is 0.30 or more and 1.40 or less, slice pieces with sufficient film thickness accuracy can be obtained at a higher yield while ensuring the workability of slicing using the slicing jig of the present invention.

[0037] Furthermore, from the standpoint of obtaining sliced ​​pieces with sufficient film thickness accuracy at a higher yield while ensuring ease of slicing, when the slicing jig holding the resin molding is viewed in a plan view from above, the total area of ​​the pressing tool and cushioning material arranged on the resin molding is preferably 94% or more and 106% or less, and more preferably 94% or more and 100% or less, of the area of ​​the top surface of the resin molding as 100%.

[0038] When the pusher equipped with the cushioning material is viewed from above in a plan view, the thickness of the cushioning material (width in a direction perpendicular to the side peripheral surface of the pusher) is preferably 3 mm to 28 mm. If the thickness of the cushioning material is 3 mm or more, it can sufficiently absorb the size variation of the resin molding, and if it is 28 mm or less, slice pieces with sufficient film thickness accuracy can be obtained at a higher yield.

[0039] Here, the apparent Young's modulus of the buffer material is preferably 0.03 GPa or more, more preferably 0.05 GPa or more, and preferably 0.15 GPa or less, and more preferably 0.10 GPa or less. If the apparent Young's modulus of the buffer material is within the above-mentioned range, slice pieces having sufficient thickness accuracy while fully absorbing the size variation of the resin molded body can be obtained with a higher yield.

[0040] The material constituting the buffer material is not particularly limited, but examples thereof include nitrile rubber (NBR, a copolymer of butadiene and acrylonitrile), chloroprene rubber (CR, a homopolymer of chloroprene), and ethylene propylene rubber (EPM, a copolymer of ethylene and propylene). These may be used alone or in combination of two or more. Among these, nitrile rubber is preferred from the viewpoint of obtaining slices with sufficient thickness accuracy at a higher yield.

[0041] <Pressing mechanism> The pressing mechanism that is optionally provided in the slicing jig of the present invention includes, for example, an upper presser that abuts from above on the pressing tool placed on the resin molded body, a pressure source that generates pressure to press the pressing tool downward, and a rod that connects the pressure source and the upper presser.

[0042] Here, the size of the upper presser is not particularly limited as long as it can be accommodated in a pair of clamping surfaces of the holder when viewed from above. In addition, the material of the upper presser can be the same as those mentioned above as the "material constituting the pressing tool", and among these, polyamide resin is preferred.

[0043] The pressure source is not particularly limited as long as it is capable of moving the rod and the upper presser attached to the end of the rod up and down and can press the upper presser downward using a spring or the like, and any mechanical element can be used.

[0044] (How to slice) The method for slicing a resin molded product of the present invention is a method for slicing a resin molded product using the above-mentioned slicing jig of the present invention to obtain sliced ​​pieces.

[0045] The slicing method of the present invention is characterized by sequentially carrying out the steps of: holding a resin molded body in a holder so that a part of the resin molded body protrudes from the lower opening of the holder; placing a pusher having a cushioning material on the resin molded body to place the resin molded body held by the holder at a slicing start position; slicing the resin molded body held by the holder one or more times; placing the resin molded body sliced ​​in step (B) at an extrusion start position while being held by the holder; pushing the resin molded body held by the holder downward; and placing the resin molded body held by the holder at a slicing start position and slicing the resin molded body held by the holder one or more times. In this way, by carrying out steps (A) and (B) and then steps (C) and (D) using any of the above-mentioned slicing jigs, the resin molded body part held by the holder can be sliced ​​in step (E). Therefore, the resin molding is firmly held by the holder to prevent the resin molding from deforming during slicing, while the resin molding portion held by the holder is pushed out from the holder, and sliced ​​in step (E). In addition, since the slicing method of the present invention uses any of the slicing jigs described above, even if the thickness of the resin molding decreases as slicing progresses, the cushioning material prevents the pushing tool from swinging, and the slicing of the resin molding can be completed while maintaining high film thickness accuracy. As a result, sliced ​​pieces with sufficient film thickness accuracy can be obtained at a high yield.

[0046] In the method for slicing a resin molded body of the present invention, after carrying out step (E), the steps of arranging the sliced ​​resin molded body at an extrusion start position while it is held by the holder, pushing the resin molded body held by the holder downward, and arranging the resin molded body held by the holder at a slicing start position and slicing the resin molded body held by the holder one or more times may be sequentially repeated. This is because by repeatedly carrying out the operation of pushing out the resin molded body part held by the holder in the immediately preceding slicing step from the holder and slicing it, sliced ​​pieces of the resin molded body can be obtained with an even higher yield.

[0047] <Process (A)> In step (A) of the method for slicing a resin molded body of the present invention, the resin molded body is held by a holder so that a part of the resin molded body protrudes from the lower opening of the holder (i.e., protrudes downward from the lower end of the holder), and a pusher equipped with a cushioning material is placed on the resin molded body, and the resin molded body held by the holder is placed at the slicing start position. Specifically, for example, as shown in FIG. 5(a), the resin molded body 10 is held by the holder 20 so that a part of the resin molded body 10 protrudes from the lower opening of the holder 20. In addition, a pusher 30 equipped with a cushioning material (not shown) on the side peripheral surface is placed on the resin molded body 10 held by the holder 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 placed at the slicing start position on the slide surface 70 on which the slicing blade 60 is installed. In steps (A) to (E) described in detail below, the resin molding held by the holder may be moved and sliced ​​manually, or may be sliced ​​using a slicing device equipped with a slide mechanism for moving the gripped holder (for example, a product name "Super Finish Planer Super Mecha S" manufactured by Marunaka Iron Works Co., Ltd.) In addition, the resin molding 10 held by the holder 20 may be arranged at the slicing start position and the extrusion start position by moving a slide surface 70 on which a slicing blade 60 is installed.

[0048] Here, when the resin molded body is a laminate of a plurality of sheets, in step (A), it is preferable to hold the resin molded body in the holder so that both sides of the resin molded body in the stacking direction are clamped by the clamping surfaces of the holder. A resin molded body made of a laminate of a plurality of sheets is prone to peeling between the sheets and is prone to deformation during slicing, but if both sides in the stacking direction are clamped by the clamping surfaces of the holder, deformation of the resin molded body during slicing can be sufficiently suppressed.

[0049] In addition, the length of the resin molded body protruding from the lower opening of the holder (protruding from the lower end) is not particularly limited, and is preferably, for example, 0.5 mm to 30 mm. If the length of the resin molded body protruding from the lower opening of the holder is 30 mm or less, deformation of the resin molded body during slicing can be sufficiently suppressed. Furthermore, if the length of the resin molded body protruding from the lower end of the holder is 0.5 mm or more, a sufficient amount of the resin molded body can be sliced ​​in step (B), and sliced ​​pieces can be obtained efficiently.

[0050] <Process (B)> Next, in step (B), the resin molded body held by the holder is moved relative to the slicing blade to slice the resin molded body protruding from the lower end of the holder one or more times. Specifically, as shown in Fig. 5(b), for example, the resin molded body 10 held by the holder 20 is slid leftward on the slide surface 70 to slice the resin molded body 10 protruding from the lower end of the holder 20 one or more times. In addition, in step (B), when the resin molding 10 is sliced ​​multiple times (twice or more), the length of the resin molding 10 protruding from the lower end of the holder 20 becomes shorter with each slice, and therefore the distance between the holder 20 at the slicing start position and the slicing blade 60 and slicing surface 70 becomes narrower with each slice.

[0051] The number of times the resin molded body is sliced ​​can be any number of times as long as the holder does not come into contact with the slicing blade. The resin molded body may be sliced ​​by moving the resin molded body held by the holder with the position of the slicing blade fixed, by moving the slicing blade with the position of the resin molded body held by the holder fixed, or by moving both the slicing blade and the resin molded body held by the holder.

[0052] In step (B), the resin molding firmly held by the holder can be sliced, so that sliced ​​pieces can be obtained while preventing the portions of the resin molding protruding from the holder from deforming during slicing.

[0053] In step (B), as shown in Fig. 5(b), the resin molding 10 is sliced ​​with a pusher 30 placed on the resin molding 10 held by the holder 20. By slicing the resin molding 10 with the pusher 30 placed on it, the resin molding 10 can be pressed downward by the weight of the pusher 30 while slicing, so that the resin molding 10 can be well sliced. Furthermore, in the case where the slicing jig is provided with a pressing mechanism, slicing can also be performed while pressing the pressing tool 30 and the resin molded body 10 downward with the pressing mechanism.

[0054] <Process (C)> In step (C), when the length of the resin molded body protruding from the lower end of the holder is shortened to a certain extent by slicing in step (B), the partially sliced ​​resin molded body is placed at the extrusion start position while being held by the holder. Specifically, for example, as shown in Fig. 5(c), the resin molded body 10 that has been partially sliced ​​and is held by the holder 20 is lifted upward and placed at the extrusion start position.

[0055] <Process (D)> Next, in step (D), at the extrusion start position, the resin molded body held by the holder is pressed downward via a pusher to push a part of the resin molded body downward from the lower opening (lower end) of the holder. Specifically, for example, as shown in Fig. 5(d), an external force F is applied from above to the resin molded body 10 held by the holder 20 via a pusher 30 to push a part of the resin molded body 10 downward from the lower opening of the holder 20. The external force applied to the resin molded body is not particularly limited, but is preferably applied by the above-mentioned pressing mechanism.

[0056] Here, the length of the resin molded body protruding from the lower opening of the holder is preferably, for example, 0.5 mm or more and 30 mm or less, for the same reasons as in step (A).

[0057] Furthermore, the magnitude of the external force applied to the resin molded body in step (D) is not particularly limited as long as it can push the pusher equipped with the cushioning material and the resin molded body straight downward, and can be adjusted as appropriate.

[0058] When the resin molded body is pushed downward as described above, if the holder is formed so as to be divisible and recombinable using a fastening mechanism such as a screw hole and a screw, the clamping pressure of the holder may be weakened by adjusting the fastening mechanism. Also, if the holder is provided with a movable chuck, the chuck position may be adjusted to release the resin molded body.

[0059] In step (D), the amount of the resin molded body to be extruded may be adjusted by utilizing the slide surface. Specifically, in step (D), the extrusion start position is set to a 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 opening (lower end) of the holder, and the amount of the resin molded body to be extruded may be adjusted by extruding the resin molded body until it abuts against the slide surface. In this way, by utilizing the slide surface, the amount of the resin molded body to be extruded can be reliably adjusted.

[0060] Furthermore, in the method for slicing a resin molded body of the present invention, after carrying out step (D) and before carrying out step (E), the extrusion state of the resin molded body may be confirmed. Specifically, the extrusion state of the resin molded body may be confirmed by utilizing a mechanism for detecting whether the resin molded body is extruded at an angle. If the resin molded body is extruded at an angle, it is preferable to correct the extrusion state so that the resin molded body is extruded straight. This is because if the next step (E) is carried out in a state in which the resin molded body is extruded at an angle, the surface accuracy of the obtained sliced ​​pieces will decrease. The mechanism for detecting whether the resin molding is being extruded at an angle is not particularly limited, and examples include a pressure sensor that detects whether the entire bottom surface of the resin molding is in uniform surface contact; a slice surface formed of a transparent material that allows visual confirmation of whether the entire bottom surface of the resin molding is in uniform surface contact; and a mark such as a scale arranged on the side of the pressing tool.

[0061] <Process (E)> Thereafter, in step (E), the resin molded body extruded in step (D) is placed together with the holder at a slicing start position, and the resin molded body held by the holder is moved relative to the slicing blade to slice the resin molded body protruding from the lower end of the holder one or more times. Specifically, for example, as shown in Fig. 5(e), the resin molded body 10 held by the holder 20 is moved to the slicing start position on the slide surface 70, and then the resin molded body 10 held by the holder 20 on the slide surface 70 is slid leftward in the illustrated example to slice the resin molded body 10 protruding from the lower opening of the holder 20 one or more times.

[0062] As in step (B), the number of times the resin molded body is sliced ​​can be any number of times as long as the holder does not come into contact with the slicing blade. The resin molded body may be sliced ​​by moving the resin molded body held by the holder with the position of the slicing blade fixed, by moving the slicing blade with the position of the resin molded body held by the holder fixed, or by moving both the slicing blade and the resin molded body held by the holder. Furthermore, the resin molded body may be sliced ​​while pressing the resin molded body against the slide surface with a force that does not push the resin molded body out of the holder.

[0063] In step (E), the resin molded body held firmly by the holder can be sliced, so that sliced ​​pieces can be obtained while suppressing deformation of the resin molded body portion protruding from the holder during slicing. Also, in step (E), the resin molded body portion held by the holder during the implementation of step (B) can be sliced, so that sliced ​​pieces of the resin molded body can be obtained with a high yield.

[0064] <Subsequent process> In the slicing method of the present invention, after the step (E) is performed, the same operations as the above-mentioned steps (C) to (E) may be sequentially repeated. By repeatedly performing the operation of pushing out the resin molded body part held by the holder in the immediately preceding slicing step from the holder and slicing it, the resin molded body 10 can be further pushed out and sliced, for example, as shown in FIG. 5(f). In addition, in the slicing method of the present invention, even if the thickness of the resin molded body held by the holder is reduced by repeating the extrusion and slicing, the slicing of the resin molded body can be completed while maintaining high film thickness accuracy due to the contribution of the above-mentioned buffer material. As a result, slice pieces with sufficient film thickness accuracy can be obtained at a high yield. EXAMPLES

[0065] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples. In the examples and comparative examples, the static friction coefficient of the cushioning material, the apparent Young's modulus of the cushioning material, the Young's modulus of the pressing tool, the Asker C hardness of the resin molded body, and the film thickness and yield of the thermal conductive sheet (slices) were measured and evaluated using the following methods.

[0066] <Static friction coefficient> The static friction coefficient was measured in accordance with JIS K7312 using a tester (manufactured by Shimadzu Corporation, product name "AG-IS20kN"). Specifically, a test piece of approximately 120 x 120 mm made of the same material as the cushioning material was prepared, and a moving weight adjusted to a total weight of 200 g was placed on the test piece fixed to a table, and the weight was pulled horizontally against the test piece at a speed of 100 mm / min to measure the test force (N) when pulling the weight. The obtained test force (N) was calculated using the following formula: μs=As / B In the above formula, μs is the static friction coefficient, As is the maximum tensile test force (N) at the start, and B is the gravity (N) due to the weight. For Comparative Examples 1 and 2 in which no cushioning material was used, the above measurements were carried out using a test piece made of the same material as the pressing tool instead of the cushioning material. <Apparent Young's modulus (cushion material)> To calculate the apparent Young's modulus of the cushioning material, the static shear modulus was measured first. The static shear modulus was measured in accordance with JIS K6254 using a testing machine (manufactured by Shimadzu Corporation, product name "AG-IS20kN"). Specifically, using a test piece punched into a rectangular shape No. 1 with a punching blade, the tension speed was 50 mm / min, the chuck distance was 80 mm, and preliminary tension was performed twice and a 25% tension test was performed once as the main test. The static shear modulus was calculated by substituting the obtained stress (MPa) into the following formula. G ε = σ ε / (a-1 / a 2 ) In the above formula, Gε is the 25% static shear modulus (MPa), σε is the 25% tensile stress (MPa), and a=1.25. Since the buffer material is an infinitely long column, the obtained static shear modulus (MPa) is calculated using the following formula: E ap =G ε (4+3.29(b / 2h) 2 ) x 10 ―3 The apparent Young's modulus was calculated by substituting E ap is the apparent Young's modulus (GPa), b is the width of the material (mm), and h is the height or thickness of the material (mm). An infinitely long column is a rectangular column whose length is three times longer than its width in terms of the material shape. <Young's modulus (indenter)> The Young's modulus of the indentation tool was measured using a testing machine (manufactured by Shimadzu Corporation, product name "AG-IS20kN") in accordance with ASTM D638. Specifically, a tensile test was performed using a test piece punched out with a dumbbell-shaped punching blade Type IV at a tensile speed of 50 mm / min and a chuck distance of 65 mm. The Young's modulus E (GPa) was calculated from the slope of the curve in the elastic region of the obtained stress-strain curve using the following formula. E = (σ 2 -σ 1 ) / (ε 2 -ε 1 ) x 10 -3 Here, in the above formula, σ 1 is the strain ε 1 Stress (MPa) at 0.05% of (mm), σ 2 is the strain ε 2 (mm) is the stress (MPa) at 0.05%. <Asker C hardness> The Asker C hardness of the resin molded body was measured at 23°C using a hardness tester (manufactured by Kobunshi Keiki Co., Ltd., product name "ASKER CL-150LJ") in accordance with the Asker C method of the Society of Rubber Industry Standards of Japan (SRIS). Specifically, the obtained resin molded body (laminate) was left to stand in a thermostatic chamber maintained at a temperature of 23°C for 48 hours or more to prepare a test specimen. Next, the hardness tester was placed so that the needle tip was 2 cm away from the laminate surface, and the damper was lowered to cause the block body (laminate) to collide with the damper. The Asker C hardness of the block body (laminate) 60 seconds after the collision was measured twice using a hardness tester (manufactured by Kobunshi Keiki Co., Ltd., product name "ASKER CL-150LJ"), and the average value of the measurement results was used. <Film thickness precision and yield> Using a film thickness gauge (manufactured by Mitutoyo, product name "Digimatic Indicator ID-C112XBS"), the thickness of the obtained thermally conductive sheet was measured at five points, approximately the center and the four corners (squares), and the deviation of the measured thickness (film thickness precision, μm) from the target thickness (100 μm) was calculated. Thermally conductive sheets with the obtained deviation (film thickness precision) of ±5 μm or less were classified as Class A products, and thermally conductive sheets with a film thickness precision of more than ±5 μm and 10 μm or less were classified as Class B products. The percentage of Class A products and the percentage of Class B products were calculated, with the total number of obtained thermally conductive sheets set as 100%. In addition, for the thermally conductive sheet obtained by slicing the resin molding when there was only 1 mm of thickness remaining (the final stage of slicing), the thickness was measured at 9 arbitrary points using the above-mentioned thickness meter, and the deviation of the measured thickness from the target thickness (100 μm) (film thickness accuracy, μm) was calculated.

[0067] Example 1 <Production of resin molded body> 70 parts of thermoplastic fluororesin (manufactured by Daikin Industries, Ltd., product name "Daiel G-101") that is liquid at room temperature and normal pressure as a resin, 30 parts of thermoplastic fluororesin (manufactured by 3M Japan, Ltd., product name "Dyneon FC2211") that is solid at room temperature and normal pressure, and 90 parts of expanded graphite (manufactured by Ito Graphite Industries, Ltd., product name "EC300", volume average particle size: 50 μm) as a particulate carbon material were mixed and stirred at a temperature of 150 ° C. for 20 minutes using a pressure kneader (manufactured by Nippon Spindle). Next, the resulting mixture was put into a crusher (manufactured by Osaka Chemical Co., Ltd., product name "Wonder Crush Mill D3V-10") and crushed for 10 seconds. 50 g of the crushed mixture was sandwiched between a 50 μm-thick sandblasted polyethylene terephthalate (PET) film (protective film) and roll-formed under the conditions of a roll gap of 550 μm, a roll temperature of 50°C, a roll linear pressure of 50 kg / cm, and a roll speed of 1 m / min to obtain a primary sheet with a thickness of 0.8 mm. The obtained primary sheet was cut to a size of 150 mm length × 150 mm width × 0.8 mm thickness, and 188 sheets were stacked in the thickness direction of the primary sheet. Further, the sheet was pressed in the stacking direction at a temperature of 120°C and a pressure of 0.1 MPa for 3 minutes to obtain a rectangular column-shaped laminate (resin molded body X, mass: 10 kg, Asker C hardness: 75) with a height of approximately 150 mm. <Slice> A square cylinder having screw holes and screws, with four walls that can be separated and joined by loosening or tightening the screws, was provided with chucks on two inner circumferential faces (the side wall located on the lower side and the side wall located on the right side in FIG. 4(b)) to form a holder. The inner circumferential dimension of the holder with the chucks was adjusted to be equal to the outer circumferential dimension of the resin molded body. Separately, a pusher (square pillar-shaped, made of polyamide resin (product name: MC Nylon (registered trademark)), Young's modulus: 2.5 GPa) was prepared, and a cushioning material (made of nitrile rubber (NBR), apparent Young's modulus: 0.08 GPa, thickness: 3 mm, static friction coefficient: 1.03) was attached to all four sides of this pusher using double-sided tape. When the pusher equipped with the cushioning material was viewed in plan from above, the length of the portion of the pusher covering the side surface of the pusher that was covered by the cushioning material was 100% of the side circumference of the pusher. The height of the cushioning material was also 100% of the height of the pusher. Next, the resin molding was set on the inner surface of the holding tool so that the stacking direction of the resin molding was perpendicular to the axis of the holding tool and so that the resin molding protruded 5 mm from the lower opening of the holding tool (the resin molding and the slicing jig (holding tool and pushing tool equipped with cushioning material) were in the state shown in Figure 1, except for the number of chucks equipped on the holding tool). In addition, a pressing mechanism including an upper presser, a pressure source, and a rod was prepared, and was arranged so that the upper presser abutted against the pressing tool, as shown in FIG. The area of ​​the lower surface (bottom surface) of the pusher was 96% of the area of ​​the upper surface of the resin molded body, assuming that the area is 100%. In addition, when viewed from above in a plan view, the total area of ​​the pusher and the cushioning material was 96% of the area of ​​the upper surface of the resin molded body, assuming that the area is 100%. Then, the resin molding portion protruding from the holder was sliced ​​(five times) and an operation of applying an external force of 0.014 MPa from above downwards using a pressing mechanism to push the resin molding held by the holder out from the lower opening of the holder so that the resin molding protruded 5 mm (note that when pushing out, the chuck position was adjusted to release the resin molding) was alternately repeated to obtain a thermally conductive sheet (slice) measuring 150 mm in length x 150 mm in width x 0.100 mm in thickness (100 μm). The slicing was performed using a wood slicer (manufactured by Marunaka Iron Works Co., Ltd., product name "Super Finishing Planer Super Mecha S") while pressing downwards with a pressure of 0.014 MPa using a pressing mechanism against a pressing plate placed on the resin molding. The thickness accuracy and yield of the thermal conductive sheet were then evaluated. The results are shown in Table 1.

[0068] (Examples 2 to 5) Except for changing the material of the buffer material as follows, the resin molded body was sliced ​​to prepare a thermally conductive sheet (sliced ​​piece), and the thickness accuracy and yield were evaluated in the same manner as in Example 1. The results are shown in Table 1. <Example 2> Made of nitrile rubber, apparent Young's modulus: 0.11 GPa, static friction coefficient: 0.90 <Example 3> Made of nitrile rubber, apparent Young's modulus: 0.04GPa, static friction coefficient: 1.08 <Example 4> Made of nitrile rubber, apparent Young's modulus: 0.08 GPa, static friction coefficient: 1.20. It was made by rubbing the surface of the buffer material used in Example 1 with a file. <Example 5> Made of nitrile rubber, apparent Young's modulus: 0.08 GPa, static friction coefficient: 0.48. It was produced by attaching a thin film of ABS resin to the surface of the cushioning material used in Example 1.

[0069] Example 6 <Production of resin molded body> 100 parts of a thermoplastic fluororesin (manufactured by Daikin Industries, Ltd., product name "Daiel G-101") that is liquid at room temperature and normal pressure as a resin, and 50 parts of expanded graphite (manufactured by Ito Graphite Industries Co., Ltd., product name "EC100", volume average particle size: 190 μm) as a particulate carbon material were mixed and stirred for 20 minutes at a temperature of 150° C. using a pressure kneader (manufactured by Nippon Spindle Co., Ltd.). Next, the resulting mixture was put into a crusher (manufactured by Osaka Chemical Co., Ltd., product name "Wonder Crush Mill D3V-10") and crushed for 10 seconds. 50 g of the crushed mixture was sandwiched between a 50 μm-thick sandblasted polyethylene terephthalate (PET) film (protective film) and roll-formed under the conditions of a roll gap of 550 μm, a roll temperature of 50°C, a roll linear pressure of 50 kg / cm, and a roll speed of 1 m / min to obtain a primary sheet with a thickness of 0.8 mm. The obtained primary sheet was cut to a size of 60 mm length x 60 mm width x 0.8 mm thickness, and 188 sheets were stacked in the thickness direction of the primary sheet. Further, the sheet was pressed in the stacking direction at a temperature of 120°C and a pressure of 0.1 MPa for 3 minutes to obtain a rectangular column-shaped laminate with a height of approximately 60 mm (resin molded body Y, mass: 0.4 kg, Asker C hardness: 40). <Slice> A thermally conductive sheet (slice) was obtained in the same manner as in Example 1, except that the inner peripheral dimension of the holder provided with the chuck was adjusted to be equal to the outer peripheral dimension of the resin molded body Y. Then, the thickness precision and yield of the thermally conductive sheet were evaluated. The results are shown in Table 1.

[0070] Comparative Example 1 A heat conductive sheet (slice) was obtained in the same manner as in Example 1, except that a pressing tool (rectangular column, made of polycarbonate, Young's modulus: 2.3 GPa, static friction coefficient: 0.45) was used and no cushioning material was provided on the circumferential surface of the pressing tool. The thickness accuracy and yield of the heat conductive sheet were then evaluated. The results are shown in Table 1.

[0071] Comparative Example 2 A thermally conductive sheet (slice) was obtained in the same manner as in Example 1, except that no cushioning material was provided on the circumferential surface of the pressing tool (rectangular columnar, made of polyamide resin (product name: MC Nylon, Young's modulus: 2.5 GPa, static friction coefficient: 0.24). The thickness precision and yield of the thermally conductive sheet were then evaluated. The results are shown in Table 1.

[0072] [Table 1]

[0073] It can be seen from Table 1 that slice pieces with excellent thickness accuracy were obtained at a high yield in Examples 1 to 6. On the other hand, it can be seen from Table 1 that the yield of slice pieces with excellent thickness accuracy could not be sufficiently increased in Comparative Examples 1 and 2 in which no cushioning material was provided on the side peripheral surface of the pressing tool. [Industrial Applicability]

[0074] By using the resin molding slicing jig and slicing method of the present invention, sliced ​​pieces having sufficient thickness accuracy can be obtained from the resin molding at a high yield. [Explanation of symbols]

[0075] 100,100A Slicing Jig 10 Resin molding 20 Holder 21 Clamping surface 22 Chuck 23 Top opening 24 Lower opening 30 Push-in tool 40 Cushioning material 50 Pressing mechanism 51 Upper presser 52 Pressure Source 53 Rod 60 Slicing Blade 70 Slide surface F external force

Claims

1. a holder having at least a pair of clamping surfaces for clamping a resin molded body, a lower opening through which a part of the resin molded body protrudes, and an upper opening; A pusher placed on the resin molded body; A tool for slicing a resin molded body comprising: A tool for slicing resin molded bodies, in which a cushioning material is arranged on at least a portion of the side surface of the pushing tool, and the pushing tool and the cushioning material have a size that can be accommodated between the pair of clamping surfaces when viewed in a plan view from above.

2. 2. A slicing jig for resin molded bodies as described in claim 1, wherein when viewed in a plan view from above, the length of the portion of the cushioning material covering the side surface of the pushing tool accounts for 80% or more and 100% or less of the side circumference of the pushing tool.

3. 3. The tool for slicing a resin molded body according to claim 1, wherein the buffer material has a static friction coefficient of 0.30 or more and 1.40 or less.

4. The tool for slicing a resin molded body according to any one of claims 1 to 3, wherein the apparent Young's modulus of the buffer material is 0.03 GPa or more and 0.15 GPa or less.

5. A method for slicing a resin molded body, comprising slicing the resin molded body to obtain slices using the tool for slicing a resin molded body according to any one of claims 1 to 4, comprising the steps of: A step (A) of holding the resin molding in the holder so that a portion of the resin molding protrudes from a lower opening of the holder, and placing the pushing tool having the buffer material on the resin molding to position the resin molding held by the holder at a slicing start position; After the step (A), a step (B) is performed to slice the resin molded body protruding from the lower opening of the holder one or more times by moving the resin molded body held by the holder relative to the slicing blade. After the step (B), a step (C) is performed to place the resin molded body, which has been sliced ​​and is held by the holder, at an extrusion start position; a step (D) of pushing out a portion of the resin molded body held by the holder below a lower opening of the holder after the step (C); After the step (D), a step (E) of arranging the resin molded body held by the holder at a slicing start position, and moving the resin molded body held by the holder relative to the slicing blade to slice the resin molded body protruding from the lower opening of the holder one or more times; A method for slicing a resin molded body, comprising the steps of:

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