Deburring device

Abstract

To provide a deburring device that removes a burr formed with a foam resin mold.SOLUTION: The deburring device that removes a burr from a foam resin mold comprises a movable air nozzle that changes the direction of air ejection to eject the air and a transport part that transports the foam resin mold so that the burr receives the air.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a deburring device for removing burrs from a foamed resin molded product.

Background Art

[0002] Patent Document 1 discloses a manufacturing method for cutting burrs formed along with a foamed resin molded product. In this manufacturing method, dry ice particles are blown onto the foamed resin molded product by an operator or a robot to cut the burrs.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention provides a novel deburring device for removing burrs formed along with a foamed resin molded product.

[0005] A deburring device according to an aspect of the present disclosure is a deburring device for removing burrs from a foamed resin molded product, and includes a movable air nozzle that varies the ejection direction of air and ejects the air, and a transport unit that transports the foamed resin molded product so that the burrs receive the air.

Effects of the Invention

[0006] According to the deburring device of the present disclosure, a novel deburring device for removing burrs formed along with a foamed resin molded product can be provided.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0009] <Foamed resin molded product> First, with reference to FIG. 1, a foamed resin molded product 2 from which burrs are removed by a burr removal device 1 according to an embodiment of the present disclosure will be described.

[0010] The foamed resin molded product 2 from which burrs are removed by the burr removal device 1 of the present embodiment is, for example, a shock absorber attached to a pillar, a panel, or the like that is a structure of a vehicle. However, the foamed resin molded product 2 is not limited to this, and may be arranged in an aircraft, a ship, a building, or other internal spaces.

[0011] The foamed resin molded product 2 includes a first surface 21, a second surface 22 opposite to the first surface 21, and a third surface 23 provided between the first surface 21 and the second surface 22.

[0012] The third surface 23 has four flat surfaces 23a (only two flat surfaces 23a appear in FIG. 1) and four curved surfaces 23b (only two curved surfaces 23b appear in FIG. 1) that connect two adjacent flat surfaces 23a.

[0013] The foamed resin molded product 2 can be formed by foam molding using a mold having a first mold and a second mold. The first mold and the second mold form a cavity for forming the foamed resin molded product 2 in a mold-closed state. Such a foamed resin molded product 2 may be accompanied by a burr 25 formed of a foamed resin raw material that has protruded from the gap between the mating surfaces of the first mold and the second mold.

[0014] In this embodiment, the burr 25 of the foamed resin molded product 2 targeted is formed over the entire circumference of the foamed resin molded product 2 on the third surface 23 of the foamed resin molded product 2. The burr 25 has a straight portion 25a formed on the flat surface 23a and a curved portion 25b formed on the curved surface 23b. Hereinafter, the boundary line between the foamed resin molded product 2 and the burr 25 is referred to as the "burr boundary line 24".

[0015] The burr 25 has, for example, a thickness of 0.05 mm or more and 0.5 mm or less, and a protruding length of 5 mm or more and 100 mm or less from the burr boundary line 24.

[0016] The foamed resin molded product 2 targeted in this embodiment is a mold-foamed product of polyurethane foam. As the polyurethane foam, rigid polyurethane foam, soft polyurethane foam, or semi-rigid polyurethane foam can be applied.

[0017] <Burr removing device> Next, with reference to FIGS. 2 to 8, a burr removing device 1 for removing the burr 25 from the foamed resin molded product 2 will be described. FIGS. 2 and 3 are schematic views showing the structure of the burr removing device 1. FIG. 2 is a front view of the burr removing device 1. FIG. 3 is a side view of the burr removing device.

[0018] As shown in FIG. 2, the burr removing device 1 includes a frame 5, a conveying unit 6, and a movable air nozzle 7 that injects compressed air (hereinafter referred to as air).

[0019] The frame 5 includes a base 51, a plurality of vertical frames 52 fixed to the base 51, and a plurality of horizontal frames 53 spanned across the vertical frames 52.

[0020] The conveying unit 6 is fixed to the frame 5 and conveys the foamed resin molded product 2. In the present embodiment, the conveying unit 6 conveys the foamed resin molded product 2 along the first direction (the black arrow in FIG. 2) along the straight portion 25a where the flash 25 extends linearly in the foamed resin molded product 2. Note that the first direction in the present embodiment is the same as the arrow X direction in FIG. 2.

[0021] The conveying unit 6 includes a first conveyor 61, a second conveyor 62 facing the first conveyor 61, and a third conveyor 63 arranged away from the second conveyor 62 and facing the first conveyor 61.

[0022] In the present embodiment, the first conveyor 61, the second conveyor 62, and the third conveyor 63 are roller conveyors provided with a plurality of rollers rotated by a motor. However, the first conveyor 61, the second conveyor 62, and the third conveyor 63 are not limited thereto, and may be belt conveyors, chain conveyors, or gravity conveyors that do not use power.

[0023] As shown in FIG. 3, the first conveyor 61 is in contact with the first surface 21 of the foamed resin molded product 2. The second conveyor 62 is in contact with the second surface 22 of the foamed resin molded product 2, and sandwiches the foamed resin molded product 2 together with the first conveyor 61 to maintain the foamed resin molded product 2 in a predetermined posture.

[0024] The third conveyor 63 may be in contact with the second surface 22 of the foamed resin molded product 2 and maintain the posture of the foamed resin molded product 2 together with the first conveyor 61 and the second conveyor 62. The flash removing device 1 may be adaptable to the flash removal of two or more types of foamed resin molded products 2 having different shapes. As shown in FIG. 3, a certain type of foamed resin molded product 2 is supported by the first conveyor 61, the second conveyor 62, and the third conveyor 63. Another type of foamed resin molded product 2 is not in contact with the third conveyor 63 and is supported by the first conveyor 61 and the second conveyor 62.

[0025] The movable air nozzle 7 is fixed to the vertical frame 52 or the horizontal frame 53 and is arranged facing the foamed resin molded product 2 conveyed by the conveying unit 6. The movable air nozzle 7 includes swingable first air nozzles 711, 712, 713 (which may be collectively referred to as "the first air nozzle 71"). The movable air nozzle 7 also includes second air nozzles 721, 722, 723 (which may be collectively referred to as "the second air nozzle 72") whose air injection parts rotate circularly.

[0026] In the present embodiment, the first air nozzle 71 is arranged to inject air toward the straight part 25a of the flash 25. Specifically, the first air nozzle 71 is arranged to inject air from above or below toward the flash boundary line 24 (base) of the straight part 25a of the flash 25. Also, the second air nozzle 72 is arranged to inject air toward the curved part 25b of the flash 25. Specifically, the second air nozzle 72 is arranged to inject air from above or below toward the flash boundary line 24 of the curved part 25b of the flash 25.

[0027] The pressure of the air supplied to the movable air nozzle 7 is, for example, 0.5 MPa or more and 1.5 MPa or less. The distance between the movable air nozzle 7 and the foamed resin molded product 2 is, for example, 10 mm or more and 100 mm or less.

[0028] The first air nozzles 711, 712 of the present embodiment swing in a direction intersecting the first direction (the direction of the black arrow in FIG. 2). The swing direction of the first air nozzles 711, 712 swings so as to intersect obliquely with respect to the first direction. It is preferable to swing at an angle of 30° or less with respect to the first direction. The first air nozzle 713 of the present embodiment swings in the direction of the arrow Y in FIG. 3. The first air nozzle 713 of the present embodiment swings in a direction intersecting the first direction (the direction of the black arrow in FIG. 2). Also, the swing direction of the first air nozzle 713 of the present embodiment swings so as to intersect obliquely with respect to the straight direction of the straight part 25a of the flash of the foamed resin molded product 2. It is preferable to swing at an angle of 30° or less with respect to the straight direction of the straight part 25a of the flash of the foamed resin molded product 2.

[0029] Figure 4 is a schematic view showing the structure of the first air nozzle 71. Fig. 4(a) is a top view of the first air nozzle 71. Fig. 4(b) is a side view of the first air nozzle 71.

[0030] As shown in Fig. 4, the first air nozzle 71 injects air (see the dotted pattern in Figs. 4(a) and 4(b)) in a conical shape around the injection direction S1. The first air nozzle 71 is a movable air nozzle that oscillates while injecting air and can change the injection direction S1 of the air.

[0031] As shown in Fig. 4(a), the first air nozzle 71 includes a support portion 71a, a base portion 71b fixed to the frame 5 via the support portion 71a, an injection portion 71c that injects air, a pair of arms 71d, a flexible tube 71e, and a pipe 71f through which air is supplied from a compressor (not shown).

[0032] The arm 71d is a rod member including a first end portion t1 and a second end portion t2 on the side opposite to the first end portion t1. The first end portion t1 is connected to the base portion 71b and is rotatable about a first rotation axis C1 with respect to the base portion 71b. The second end portion t2 is connected to the injection portion 71c, and the second end portion t2 and the injection portion 71c are rotatable relative to each other about a second rotation axis C2.

[0033] The flexible tube 71e connects the base portion 71b and the injection portion 71c. As shown in Fig. 4(b), the flexible tube 71e is longer than the distance L between the first rotation axis C1 and the second rotation axis C2 of the arm 71d. The flexible tube 71e is formed of a flexible material with lower rigidity than the pipe 71f.

[0034] The pipe 71f is connected to the base portion 71b and supplies air to the flexible tube 71e and thus the injection portion 71c via the base portion 71b.

[0035] As shown in FIG. 5, the first air nozzle 71 swings between a first position P1 and a second position P2. When air is supplied from the pipe 71f, air is vigorously ejected from the ejection part 71c, and due to the reaction, the flexible pipe 71e tries to move. At this time, the arm 71d tries to rotate about the first rotation axis C1 at the first end t1. At the same time, the ejection part 71c tries to rotate about the second rotation axis C2 at the second end t2 of the arm 71d.

[0036] The arm 71d rotates toward the first position P1 about the first rotation axis C1, and the flexible pipe 71e bends back. When the first air nozzle 71 reaches the first position P1, due to the reaction of the ejected air, the arm 71d rotates toward the second position P2 about the first rotation axis C1, and the flexible pipe 71e bends back in the opposite direction. When the first air nozzle 71 reaches the second position P2, the arm 71d reverses again. By repeating this, while air is supplied from the pipe 71f, the first air nozzle 71 swings between the first position P1 and the second position P2. The number of swings in this embodiment is, for example, about 9 to 13 times per second.

[0037] FIG. 6 is a schematic diagram showing the structure of the second air nozzle 72. FIG. 6(a) is a side view and a cross-sectional view of the second air nozzle 72. FIG. 6(b) is a front view of the second air nozzle.

[0038] As shown in FIG. 6, the second air nozzle 72 ejects air (see the dotted pattern in FIGS. 6(a) and 6(b)) in a conical shape around the ejection direction S2. The second air nozzle 72 is an air nozzle in which the ejection part 72c rotates circularly while ejecting air, and the ejection direction S2 of the air can be changed.

[0039] As shown in FIG. 6(a), the second air nozzle 72 includes a support part 72a, a base part 72b fixed to the frame 5 via the support part 72a, an ejection part 72c that ejects compressed air, a cone part 72d that guides the movement of the ejection part 72c, a flexible pipe 72e, and a pipe 72f through which compressed air is supplied from a compressor (not shown).

[0040] The cone portion 72d includes a first end portion t3, a second end portion t4 opposite to the first end portion t3, and an inner peripheral surface W. The cone portion 72d has a hollow conical shape that expands from the first end portion t3 toward the second end portion t4. The first end portion t3 is connected to and fixed to the base portion 72b. The second end portion t4 opens outward.

[0041] The flexible pipe 72e connects the base portion 72b and the injection portion 71c. The flexible pipe 72e is formed of a flexible material with lower rigidity than the pipe 72f, similar to the first air nozzle 71.

[0042] The pipe 72f is connected to the base portion 72b and supplies air to the flexible pipe 72e and thus to the injection portion 72c via the base portion 72b.

[0043] When air is supplied from the pipe 72f, air is vigorously ejected from the injection portion 71c, and the flexible pipe 71e tends to move due to the reaction force. At this time, while the base portion 72b is fixed to the first end portion t3 of the cone portion 72d, the injection portion 72c moves in accordance with the movement of the flexible pipe 72e and turns along the inner peripheral surface W of the cone portion 72d. As a result, as shown in FIG. 6(b), the second air nozzle 72 injects air circularly within the region S3 along the turning direction (see the black arrow in FIG. 6(b)) along the inner peripheral surface W of the cone portion 72d. As a result, the second air nozzle 72 can apply air to the range corresponding to the curved surface 23b in the foamed resin molded product 2.

[0044] Next, a method for removing the flash 25 of the foamed resin molded product 2 by the flash removing device 1 will be described.

[0045] As shown in FIG. 2, while the flash removing device 1 conveys the foamed resin molded product 2 in the first direction (see the black arrow in FIG. 2) by the conveying portion 6, it injects air from the movable air nozzle 7 toward the foamed resin molded product 2.

[0046] The first conveyor 61 is in contact with the first surface 21 of the foamed resin molded product 2. Also, the second conveyor 62 is in contact with the second surface 22 of the foamed resin molded product 2. Thereby, the first conveyor 61 and the second conveyor 62 convey the foamed resin molded product 2 in a state of being sandwiched from the vertical direction (the arrow Z direction in FIGS. 2 and 3).

[0047] Furthermore, the third conveyor 63 is in contact with the second surface 22 of the foamed resin molded product 2. The conveying unit 6 stably supports the foamed resin molded product 2 by the first conveyor 61, the second conveyor 62, and the third conveyor 63.

[0048] The conveying unit 6 conveys the foamed resin molded product 2 along the first direction (see FIG. 2) while maintaining the foamed resin molded product 2 in a predetermined posture.

[0049] The movable air nozzle 7 injects air into the foamed resin molded product 2 conveyed in the first direction (see the black arrow in FIG. 2) by the conveying unit 6. The movable air nozzle 7 blows air against the flash 25 of the foamed resin molded product 2 and cuts off the flash 25 from the flash boundary line 24. Thereby, the movable air nozzle 7 can remove the flash 25 of the foamed resin molded product 2.

[0050] FIGS. 7 to 9 are explanatory diagrams showing how the air injected from the movable air nozzle 7 hits the foamed resin molded product 2. In FIG. 7, an example of how the first air nozzle 71 (only the first air nozzle 711 appears in FIG. 7) blows air against the foamed resin molded product 2 is shown.

[0051] As shown in FIG. 7, it is preferable that the conveying unit 6 (see FIGS. 2 and 3) maintains the posture of the foamed resin molded product 2 so that the flash boundary line 24 and thus the flash 25 of the foamed resin molded product 2 are located within the air injection range by the first air nozzle 71.

[0052] In this embodiment, the first position P1 and the second position P2, which are the swing ranges of the first air nozzle 71, are located with the burr boundary line 24 therebetween. Further, the first position P1 of the first air nozzle 71 may be arranged closer to the plane 23a of the foamed resin molded product 2 than the second position P2, and the second position P2 may be arranged closer to the plane 23a of the foamed resin molded product 2 than the first position P1. The first air nozzle 71 swings between the first position P1 and the second position P2 while repeatedly approaching and separating from the plane 23a of the foamed resin molded product 2 with the burr boundary line 24 therebetween.

[0053] Furthermore, the angle θ1 formed between the locus S11 of the first air nozzle 71 and the first direction (see the black arrow in FIG. 7(a)) in which the foamed resin molded product 2 is conveyed is preferably 30° or less. Thereby, when the first air nozzle 71 reciprocates between the first position P1 and the second position P2, the first air nozzle 71 can blow air across one side (upper surface) of the burr 25 and the burr boundary line 24.

[0054] Also, the air injection is traced so as to obliquely intersect with respect to the straight line along which the burr boundary line 24 extends, as viewed from the air injection side. For this reason, the air ejected from the first air nozzle 71 applies a shearing force to the burr boundary line 24. As a result, the burr 25 is torn off from the foamed resin molded product 2 at the burr boundary line 24.

[0055] FIG. 8 is a front view showing the locus S11 of the first air nozzle 71 with respect to the foamed resin molded product 2. While the first air nozzle 71 swings so as to straddle and obliquely intersect the burr boundary line 24 from one side (upper surface) of the burr 25, the conveying unit 6 (see FIGS. 2 and 3) conveys the foamed resin molded product 2 in the first direction (see the black arrow in FIG. 8) in which the burr 25 (burr boundary line 24) extends. Thereby, the burr 25 receives air repeatedly over the entire length of the burr 25. As a result, the first air nozzle 71 can remove particularly the straight portion 25a of the burr 25 of the foamed resin molded product 2.

[0056] FIG. 9 shows an example of the state where the second air nozzle 72 (only the second air nozzle 721 appears in FIG. 9) blows air against the curved surface 23b of the foamed resin molded product 2.

[0057] The conveying unit 6 (see FIGS. 2 and 3) preferably maintains the posture of the foamed resin molded product 2 such that the burr boundary line 24 of the curved surface 23b in the foamed resin molded product 2 is located within the region S3 (see FIG. 6) which is the turning range of the second air nozzle 72. As shown in FIG. 9, when the second air nozzle 72 moves, for example, from the first position P3 shown by the broken line to the second position P4 shown by the solid line, it can blow air along the curved surface 23b of the foamed resin molded product 2. Also, the second air nozzle 72 may blow air from one side (lower surface) of the burr 25 across the burr boundary line 24. Thereby, the second air nozzle 72 can blow air at an angle with respect to the burr boundary line 24 of the foamed resin molded product 2.

[0058] In particular, the curved portion 25b of the burr 25 may not be able to receive the air ejected from the first air nozzle 71 sufficiently. Even in such a case, the curved portion 25b of the burr 25 can receive the air ejected from the second air nozzle 72. As a result, the second air nozzle 72 can remove the curved portion 25b of the burr 25.

[0059] The burr removing device 1 includes a movable air nozzle 7 capable of changing the ejection direction of air, and a conveying unit 6 that conveys the foamed resin molded product 2 so that the burr 25 of the foamed resin molded product 2 receives air.

[0060] Thereby, the movable air nozzle 7 can blow air against the foamed resin molded product 2 conveyed by the conveying unit 6 to tear off the burr 25. As a result, the burr removing device 1 can remove the burr 25 from the foamed resin molded product 2.

[0061] The conveying unit 6 includes a first conveyor 61 that contacts the first surface 21 of the foamed resin molded product 2 and a second conveyor 62 that contacts the second surface 22 of the foamed resin molded product 2. The first conveyor 61 and the second conveyor 62 can maintain the foamed resin molded product 2 in a predetermined posture by sandwiching the foamed resin molded product 2. In particular, even when the air from the movable air nozzle 7 hits the foamed resin molded product 2, it is possible to prevent the posture of the foamed resin molded product 2 from changing due to the momentum of the air.

[0062] The straight portion 25a of the flash 25 is linear and extends in a first direction along the foamed resin molded product 2, and the first air nozzle 71 may swing in a direction intersecting the first direction.

[0063] Thereby, the first air nozzle 71 can repeatedly apply air to the straight portion 25a of the flash 25 from a direction intersecting the first direction.

[0064] The conveying unit 6 may convey the foamed resin molded product 2 along the first direction. Thereby, the flash removing device 1 can continuously apply the air ejected from the movable air nozzle 7 to the foamed resin molded product 2.

[0065] The curved portion 25b of the flash 25 is curved along the foamed resin molded product 2, and the second air nozzle 72 may rotate in a circular shape.

[0066] Thereby, the second air nozzle 72 can sufficiently apply air to the curved portion 25b of the flash 25.

[0067] As described above, according to the flash removing device of the present disclosure, it is possible to provide a novel flash removing device that removes the flash formed along with the foamed resin molded product.

[0068] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the gist of the invention. In particular, the plurality of modification examples described in this specification can be arbitrarily combined as needed.

[0069] The transport unit 6 of this embodiment is a conveyor, but the present disclosure is not limited thereto. For example, the transport unit 6 may be a robot hand.

Explanation of Signs

[0070] 1: Burr removal device 2: Foamed resin molded product 21: First surface 22: Second surface 25: Burr 25a: Straight portion 25b: Curved portion 6: Transport unit 61: First conveyor 62: Second conveyor 7: Movable air nozzle 71: First air nozzle 72: Second air nozzle

Claims

1. A burr removing device for removing burrs from a foamed resin molded product, a movable air nozzle that varies the emission direction of air and emits the air, and a conveying unit that conveys the foamed resin molded product so that the burrs receive the air. The burr removing device comprising the above.

2. The foamed resin molded product has a first surface and a second surface opposite to the first surface, the conveying unit includes a first conveyor and a second conveyor facing the first conveyor, the first conveyor is in contact with the first surface, the second conveyor is in contact with the second surface, and maintains the foamed resin molded product in a predetermined posture by sandwiching the foamed resin molded product together with the first conveyor. The burr removing device according to Claim 1.

3. The burrs are linear and extend in a first direction along the foamed resin molded product, and the movable air nozzle swings in a direction intersecting the first direction. The burr removing device according to Claim 1.

4. The conveying unit conveys the foamed resin molded product along the first direction. The burr removing device according to Claim 3.

5. The burrs are curved and extend along the foamed resin molded product, and the movable air nozzle rotates in a circular shape. The burr removing device according to Claim 1.

Images