Spiral tube manufacturing method and spiral tube manufacturing blade

Abstract

To provide a spiral tube made of synthetic resin, which is low cost and has excellent abrasion resistance. [Solution] A method for manufacturing a spiral tube B for bundling bundles of electric wires, etc., which is characterized by carrying out a blade preparation step of preparing a blade 1 with a cutting edge having a predetermined width, and a cutting step of moving the cutting edge approximately perpendicular to the surface of a synthetic resin with excellent wear resistance in a relatively approximately cutting direction, thereby cutting the synthetic resin with the cutting edge.

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a spiral tube made of synthetic resin, and a cutting tool for manufacturing the spiral tube. [Background technology]

[0002] Spiral tubes are used in the moving parts of robots for the purpose of bundling and protecting electrical wiring and the like.

[0003] Furthermore, in dust-unfriendly environments such as semiconductor factories, the spiral tube comes into contact with and rubs against other components, creating a problem of how to deal with the wear particles that are generated by the spiral tube, and there is a demand for the development of a spiral tube with excellent wear resistance.

[0004] Patent Document 1 describes the production of a spiral tube made of ultra-high molecular weight polyethylene with excellent abrasion resistance by extrusion molding. [Prior art documents] [Patent documents]

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-165489 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the spiral tube manufacturing method described in Patent Document 1 requires an expensive press, which results in high costs for the manufactured spiral tube. Another method for manufacturing the spiral tube using heat treatment also has the drawback of being time-consuming.

[0007] An object of the present invention is to solve the above problems and to quickly realize a spiral tube made of synthetic resin at low cost. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a method for manufacturing a spiral tube for bundling electric wire bundles, etc., comprising the steps of: a blade preparation step of preparing a blade having a cutting edge with a predetermined width; Excellent wear resistance Long rectangular pillar or plate Synthetic resin plane and a cutting step of cutting the synthetic resin with the cutting edge by making the cutting edge approximately perpendicular to the synthetic resin and moving the cutting edge in a cutting direction relative to the synthetic resin.

[0009] This configuration allows for the rapid, low-cost production of spiral tubes made of synthetic resin with excellent wear resistance. Furthermore, by cutting with a blade approximately perpendicular to the workpiece, existing equipment such as a machining center can be used. Here, a resin with excellent wear resistance is one that can withstand long-term use conditions that cause wear, and one benchmark for this is a resin with a Rockwell hardness of 40 HRC or higher, which is an index indicating the hardness of industrial materials. Materials with a hardness of less than 40 HRC are said to be prone to wear, while materials with a hardness of 40 HRC or higher are said to be less prone to wear.

[0010] In the method for manufacturing a spiral tube, the cutting step may be configured to cut the synthetic resin by moving the blade relatively to the synthetic resin at approximately the same speed.

[0011] This configuration allows for the rapid production of a spiral tube with a stable shape.

[0012] In the method for manufacturing a spiral tube, the synthetic resin may be made of ultra-high molecular weight polyethylene or cast nylon.

[0013] With this configuration, ultra-high molecular weight polyethylene or cast nylon is known to have excellent abrasion resistance, and a spiral tube with excellent abrasion resistance can be produced quickly and at low cost.

[0014] In a method for manufacturing a spiral tube, the blade may have a flat surface of the specified width facing approximately in the cutting direction, and the tip of the flat surface in the cutting edge direction may have a cutting edge that forms an acute angle facing approximately in the cutting direction.

[0015] This configuration allows the production of spiral tubes with a consistent thickness. The blade may rotate clockwise or counterclockwise at a slight angle toward the cutting direction, as long as it has a flat surface facing approximately in the cutting direction.

[0016] In a method for manufacturing a spiral tube, the blade may have a flat surface of the specified width facing approximately in the cutting direction, and a recess near the tip of the flat surface in the cutting edge direction that extends in a direction perpendicular to the cutting edge direction, so that the lower end of the recess has a cutting edge that forms an acute angle in the cutting direction.

[0017] This configuration makes it easy to manufacture the cutting tool, and allows the production of a spiral tube with a consistent thickness.

[0018] In a method for manufacturing a spiral tube, the blade may have a flat surface of the specified width facing approximately in the cutting direction, and the flat surface may be perpendicular to the synthetic resin and have a specified angle counterclockwise or clockwise with respect to the cutting direction when viewed from above to perform the cutting process.

[0019] This configuration allows for stable production of wound spiral tubes.

[0020] In the method for manufacturing a spiral tube, the cutting surface of the blade in the cutting direction may have a curved surface that is recessed inward substantially relative to the cutting direction when viewed from the cutting edge side.

[0021] This configuration allows for stable production of wound spiral tubes.

[0022] In order to solve the above problems, the present invention provides a tire having excellent wear resistance. Long rectangular pillar or plate Synthetic resin plane A cutting tool for manufacturing a spiral tube by cutting The blade has a cutting edge with a flat surface of a predetermined width, and has a recess near the tip of the flat surface in the cutting edge direction that extends perpendicular to the cutting edge direction, so that the cutting edge side of the recess forms an acute angle.

[0023] This configuration makes it possible to stably manufacture a spiral tube with excellent wear resistance in a wound shape.

[0024] In order to solve the above problems, the present invention provides a tire having excellent wear resistance. Long rectangular pillar or plate Synthetic resin plane A cutting tool for manufacturing a spiral tube by cutting The blade has a curved surface of a predetermined width recessed inward on at least one side when viewed from the cutting edge side, and has a recess near the tip of the curved surface in the cutting edge direction that extends along the curved surface in a direction perpendicular to the cutting edge direction, so that the cutting edge side of the recess has an acute angle.

[0025] With this configuration, cutting is performed with the blade approximately perpendicular to the cutting direction, allowing existing equipment such as a machining center to be used and enabling stable production of a wound spiral tube with excellent wear resistance. The blade may have curved surfaces on both sides, allowing both sides to be used for cutting, thereby extending the life of the blade. [Effects of the Invention]

[0026] The spiral tube manufacturing method and spiral tube manufacturing tool of the present invention make it possible to quickly provide a spiral tube made of synthetic resin and having excellent wear resistance at low cost. [Brief explanation of the drawings]

[0027] [Figure 1] 3A to 3C are diagrams illustrating a method for manufacturing a spiral tube according to the first embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating the shape of a blade in the first embodiment of the present invention. [Figure 3] 10A to 10C are diagrams illustrating a method for manufacturing a spiral tube according to a second embodiment of the present invention. [Figure 4] 10A and 10B are diagrams illustrating the shape of a blade in Example 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0028] (Method for Manufacturing Spiral Tube) A method for manufacturing a spiral tube in the first embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a diagram for explaining the method for manufacturing a spiral tube in the first embodiment of the present invention.

[0029] The method for manufacturing a spiral tube in Example 1 first performs a blade preparation step of preparing a blade 1 having a cutting edge with a predetermined width. At this time, the blade 1 may be prepared by attaching it to equipment such as a machining center.

[0030] Next, as shown in Figure 1, a cutting process is performed in which a blade 1 is moved linearly in the cutting direction, approximately perpendicular to the surface of a long piece of synthetic resin A made of ultra-high molecular weight polyethylene or cast nylon. This cuts the synthetic resin A into a wound shape with a width approximately equal to the predetermined width of the blade 1, a constant thickness, and approximately the same diameter, allowing for the rapid production of a synthetic resin spiral tube with excellent wear resistance. The length of the long piece of synthetic resin A can be selected as desired, but from a cost perspective, it is desirable to use a commercially available product that is 1 or 2 meters long. The width of the blade 1 is preferably equal to or larger than the width of the synthetic resin A.

[0031] In the cutting step, it is desirable to cut the long synthetic resin A by moving the blade 1 in the longitudinal direction at approximately the same speed, thereby making it possible to manufacture a spiral tube with a stable winding shape.

[0032] In Example 1, the cutting step is configured to cut the surface of the long synthetic resin A linearly in the cutting direction, but this is not necessarily limited to this and can be modified as appropriate. For example, the surface of a plate-shaped synthetic resin may be cut in a curved line.

[0033] In addition, in Example 1, the blade 1 is configured to move in the approximate cutting direction relative to the synthetic resin A to cut it, but this is not necessarily limited to this and can be modified as appropriate. For example, the synthetic resin A may be cut by moving in the opposite direction to the cutting direction relative to the blade, and cutting may be performed by moving the synthetic resin A and the blade 1 relatively.

[0034] In Example 1, the cutting tool is configured to cut synthetic resins made of ultra-high molecular weight polyethylene or cast nylon, but is not limited to this and can be modified as appropriate. For example, the cutting tool may be configured to cut other synthetic resins as long as they have excellent abrasion resistance.

[0035] (Spiral tube manufacturing blade) The blade 1 in Example 1 will be described with reference to Fig. 2. Fig. 2 is a diagram illustrating the shape of the blade in Example 1 of the present invention, where (a) is a side view, (b) is a bottom view, and (c) is a front view.

[0036] As shown in Figure 2(b), the blade 1 has a predetermined width and, when viewed from the cutting edge side (bottom view), has a curved surface 13 recessed inward on at least one side, and has a generally arc-shaped recess 12 near the tip in the cutting edge direction along the curved surface 13 in a direction perpendicular to the cutting edge direction, so that the lower end of the recess 12 forms an acute angle in the cutting direction, forming a cutting edge 11 (see Figure 2(a)). This makes it possible to produce a spiral tube with a stable wound shape even when cutting with the blade 1 perpendicular to the cutting surface.

[0037] In the first embodiment, the recess 12 has an arc shape in a side view, but is not limited to this and can be modified as appropriate. For example, it may be elliptical or triangular, as long as the cutting edge has an acute angle. Alternatively, the blade 1 may have a cutting edge at the lower end that forms an acute angle in the cutting direction without having a recess.

[0038] By cutting while moving the cutting tool so that the surface having the curved surface 13 recessed inward when viewed from the cutting edge side (bottom view) is in the approximate cutting direction, a spiral tube with a stable wound shape can be produced by cutting.

[0039] The tip of the cutting edge 11 in Example 1 may be curved along the curved surface 13, or may be linear without being curved. The curved surface or recess may be provided on only one surface of the blade, or on both surfaces, as long as at least one surface has a curved surface recessed inward, and a recess near the tip in the cutting edge direction along the curved surface in a direction perpendicular to the cutting edge direction.

[0040] As described above, in Example 1, a method for manufacturing a spiral tube for bundling electric wire bundles or the like is provided, a blade preparation step of preparing a blade having a cutting edge with a predetermined width; and a cutting step in which the blade is moved approximately perpendicular to the surface of a synthetic resin having excellent wear resistance in a cutting direction relative to the surface, thereby cutting the synthetic resin with the cutting edge. This method for manufacturing a spiral tube makes it possible to quickly and inexpensively manufacture spiral tubes made of synthetic resin having excellent wear resistance.

[0041] Furthermore, in Example 1, a spiral tube cutting tool is used to cut the surface of a synthetic resin having excellent wear resistance to produce a spiral tube, and the tool has a curved surface of a predetermined width that is recessed inward on at least one side when viewed from the cutting edge side, and a recess that extends along the curved surface in a direction perpendicular to the cutting edge direction near the tip of the curved surface in the cutting edge direction, so that the cutting edge side of the recess forms an acute angle.By using this spiral tube cutting tool, spiral tubes made of a synthetic resin having excellent wear resistance can be produced quickly and at low cost. [Example]

[0042] The second embodiment of the present invention differs from the first embodiment in that the cutting step is performed with the blade at a predetermined angle oblique to the cutting direction.

[0043] (Method of Manufacturing Spiral Tube) A method of manufacturing a spiral tube in the second embodiment will be described with reference to Fig. 3. Fig. 3 is a diagram illustrating the method of manufacturing a spiral tube in the second embodiment of the present invention.

[0044] 3, the blade 101 has a flat surface with a predetermined width, and the cutting process is performed by moving the flat surface linearly in a state where it is perpendicular to the long synthetic resin A and at a predetermined angle θ counterclockwise in a top view with respect to the cutting direction. This allows for stable production of a wound spiral tube.

[0045] The predetermined angle θ can be set arbitrarily, but if it is too large, the winding interval will become large, so it is preferably about 1 to 8°, but this can be selected depending on the diameter of the spiral tube.

[0046] In Example 2, the cutting process is performed by linearly moving at a predetermined angle θ counterclockwise in top view with respect to the cutting direction, but this is not necessarily limited to this and can be modified as appropriate. For example, the cutting process may be performed by linearly moving at a predetermined angle θ clockwise in top view with respect to the cutting direction.

[0047] In addition, in Example 2, the blade 101 has a flat surface with a predetermined width, but this is not necessarily limited to this and can be modified as appropriate. For example, the blade may have a curved surface with a predetermined width that is recessed inward when viewed from the cutting edge side.

[0048] Furthermore, the cutting edge may have a recess extending in a direction perpendicular to the cutting edge direction near the tip in the cutting edge direction, so that the cutting edge side of the recess forms an acute angle.

[0049] (Spiral tube manufacturing blade) A spiral tube manufacturing blade in Example 2 will be described with reference to Fig. 4. Fig. 4 is a diagram illustrating the shape of the blade in Example 2 of the present invention, where (a) is a side view, (b) is a bottom view, and (c) is a front view.

[0050] 4, blade 101 has a predetermined width, and none of its surfaces has a curved surface recessed inward when viewed from the cutting edge side (bottom view), but is a flat surface. At least one of the flat surfaces has a recess 112 near the tip in the cutting edge direction, extending in a direction perpendicular to the cutting edge direction, so that the cutting edge side (lower end) of recess 112 forms cutting edge 111 at an acute angle.

[0051] By cutting the flat surface of this blade 101 in a linear motion, approximately perpendicular to the long, wear-resistant synthetic resin A and at a predetermined angle θ clockwise or counterclockwise in a top view relative to the cutting direction, a wound spiral tube can be stably produced.

[0052] Thus, in Example 2, the blade has a flat surface of a predetermined width, and the cutting process is performed with this flat surface being approximately perpendicular to the synthetic resin and at a predetermined angle counterclockwise or clockwise relative to the cutting direction when viewed from above, thereby making it possible to stably manufacture a wound spiral tube even if one side of the blade does not have a curved surface.

[0053] Furthermore, in Example 2, a blade for manufacturing a spiral tube by cutting the surface of a synthetic resin having excellent abrasion resistance is provided, the blade having a cutting edge with a flat surface of a predetermined width, and a recess near the tip of the flat surface in the cutting edge direction that extends in a direction perpendicular to the cutting edge direction, so that the cutting edge side of the recess forms an acute angle.By using this blade for manufacturing a spiral tube, it is possible to stably manufacture a wound spiral tube even if one side of the blade does not have a curved surface. [Industrial Applicability]

[0054] The spiral tube manufacturing method and spiral tube manufacturing tool of the present invention can be widely applied in the field of spiral tube manufacturing. [Explanation of symbols]

[0055] 1: Blade 11: Cutting edge 12: Recess 13: Curved surface 101: Blade 111: Cutting edge 112: Recess 114: Flat surface A: Synthetic resin B: Spiral tube

Claims

1. A method for manufacturing a spiral tube for bundling electric wire bundles, etc., comprising: a blade preparation step of preparing a blade having a cutting edge with a predetermined width; a cutting step in which the cutting edge is moved approximately perpendicular to the plane of a long, rectangular prism or plate-shaped synthetic resin having excellent wear resistance in a relatively approximately cutting direction, thereby cutting the synthetic resin with the cutting edge.

2. 2. The method for manufacturing a spiral tube according to claim 1, wherein the cutting step cuts the synthetic resin by moving the blade relatively to the synthetic resin at a substantially constant speed.

3. 2. The method for manufacturing a spiral tube according to claim 1, wherein the synthetic resin is made of ultra-high molecular weight polyethylene or cast nylon.

4. 2. The method for manufacturing a spiral tube according to claim 1, wherein the blade has a flat surface of the predetermined width facing approximately in the cutting direction, and the tip of the flat surface in the cutting edge direction has a cutting edge that forms an acute angle facing approximately in the cutting direction.

5. 2. The method for manufacturing a spiral tube according to claim 1, characterized in that the blade has a flat surface of the specified width facing approximately in the cutting direction, and a recess near the tip of the flat surface in the cutting edge direction that extends in a direction perpendicular to the cutting edge direction, so that the cutting edge side of the recess forms an acute angle facing approximately in the cutting direction.

6. 2. The method for manufacturing a spiral tube according to claim 1, wherein the cutting tool has a flat surface, and the cutting step is performed with the flat surface perpendicular to the synthetic resin and at a predetermined angle counterclockwise or clockwise with respect to the cutting direction when viewed from above.

7. The method for manufacturing a spiral tube according to claim 1, wherein the cutting surface of the blade in the cutting direction has a curved surface that is recessed inward when viewed from the cutting edge side.

8. A cutting tool for manufacturing a spiral tube by cutting a flat surface of a long rectangular column or plate-shaped synthetic resin having excellent wear resistance, The blade for manufacturing spiral tubes has a cutting edge with a flat surface of a predetermined width, and a recessed portion extending perpendicular to the cutting edge direction near the tip of the flat surface in the cutting edge direction, so that the cutting edge side of the recessed portion forms an acute angle.

9. A cutting tool for manufacturing a spiral tube by cutting a flat surface of a long rectangular column or plate-shaped synthetic resin having excellent wear resistance, The blade has a curved surface of a predetermined width recessed inward on at least one side when viewed from the cutting edge side, and a recess extending along the curved surface in a direction perpendicular to the cutting edge direction near the tip of the curved surface in the cutting edge direction, thereby forming a cutting edge with an acute angle on the cutting edge side of the recess.

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