Deburring jig and method for removing burrs from connected molded products

Abstract

To efficiently and stably remove burrs from a seal part by using a burr removing jig.SOLUTION: A deburring jig 15 for removing burrs 5 continuing to a seal portion 1 from a connected molded product 4 in which a plurality of seal parts 3 each having the seal portion 1 made of an elastomer material and a metal fitting 2 made of a material different from the elastomer material and integrally molded with the seal portion 1 at one end side are connected in an aligned state with an elastomer material to obtain a single seal part 3 comprises a plurality of cylindrical members 10 aligned in accordance with the aligned metal fittings 2 and into which the lower end of each metal fitting 2 can be inserted, a receiving jig main body 11 to which the lower ends of the plurality of cylindrical members 10 are fixed, and a thrusting jig 14 in which the plurality of seal portions 1 can be inserted and in which hole portions 13a having an inner diameter larger than the outer diameter of the cylindrical members 10 are aligned and arranged. A slit 12 large enough to allow at least the lower end of the metal fitting 2 to be inserted therein is formed at an upper end of the cylindrical member 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a deburring jig and method for removing burrs from a connected molded product in which a plurality of sealing parts are connected by burrs. [Background technology]

[0002] Conventionally, as in Patent Document 1, for example, in the case of multi-cavity products, molding is generally performed in which a plurality of products are connected by burrs.

[0003] In this case, after molding, it is necessary to remove burrs from the connected molded product and take out the individual product. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-139801 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of products made solely of elastomer such as rubber, it is possible to remove the burrs by hand, but in the case of composite products consisting of an axial insert part made of metal fittings etc. and a seal part made of elastomer material, the joint surface may be subjected to stress, causing the seal part to peel off from the axial insert part.

[0006] Furthermore, since this is a manual process, there are problems such as the burrs remaining being inconsistent and the deburring process taking a long time when multiple pieces are being cut.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to make it possible to remove burrs from a sealing portion efficiently and stably. [Means for solving the problem]

[0008] In order to achieve the above object, in the present invention, a jig is used for deburring, in which cylindrical members each having a slit into which the lower end of a shaft-shaped insert can be temporarily inserted are arranged in an aligned manner.

[0009] Specifically, in the first invention, A deburring jig for removing burrs from a connected molded product in which a plurality of sealing parts, each of which has a sealing part made of an elastomer material and a shaft-shaped insert part made of a material different from the elastomer material and integrally molded with the sealing part at one end thereof, are connected in an aligned state with the elastomer material, to obtain a single sealing part, a plurality of cylindrical members arranged in alignment with the aligned axial insert portions, into which the lower ends of the axial insert portions can be inserted; a receiving jig body to which the lower ends of the plurality of cylindrical members are fixed; a pushing jig into which a plurality of the seal portions can be inserted, the pushing jig having holes aligned and having an inner diameter larger than the outer diameter of the tubular member; a slit having a size large enough to allow at least the lower end of the shaft-shaped insert portion to be inserted into the upper end of the cylindrical member; The lower ends of the multiple axial insert portions are temporarily inserted into the corresponding slits of the tubular member, and then inserted further into the interior of the tubular member, and then punched out from above with the thrusting jig, thereby removing burrs connecting each seal portion.

[0010] When the sealing components are connected by burrs made of an elastomer material, the axial inserts are unstable and prone to tilting. When attempting to insert the lower ends of the axial inserts into the tubular member of the jig in this state, even if most of the axial inserts are inserted into the tubular member, if only some of the tilted axial inserts are not inserted into the tubular member, the surrounding axial inserts must also be removed from the tubular member, which is extremely tedious. However, with the above configuration, by provisionally inserting the lower ends of multiple axial inserts into the receiving jig body while aligning them with the slits in the tubular member, even if some of the axial inserts are tilted, the lower ends of the tilted axial inserts can be inserted into the slit without having to lift the surrounding axial inserts. After provisionally inserting the lower ends of all the axial inserts into the slits, the axial inserts can be inserted all the way into the tubular member, making the insertion process extremely easy. After insertion, the burrs are removed from the sealing components using a thrusting jig, allowing a single sealing component to be easily and reliably obtained.

[0011] In the second invention, in the first invention, The flash of the connecting molded product is formed in a film shape that connects the outer peripheries of the sealing portions.

[0012] According to the above configuration, the axial insert portion connected by the membrane-like burr is prone to tilting and is difficult to insert into the tubular member, but since a slit is formed in the tubular member, only the axial insert portion that is not inserted at an angle needs to be inserted into the slit, making the insertion operation extremely easy.

[0013] In the method for removing burrs from a linked molded product according to the third invention, A linked molded product in which a plurality of seal parts, each of which has a seal part made of an elastomer material and a shaft-shaped insert part made of a material different from the elastomer material and integrally molded with the seal part at one end side, are linked together in an aligned state using the elastomer material; and a deburring jig including a plurality of cylindrical members aligned to match the aligned axial insert portions and into which the lower ends of the respective axial insert portions can be inserted; a receiving jig body to which the lower ends of the plurality of cylindrical members are fixed; and a thrusting jig into which the plurality of seal portions can be inserted and which has aligned hole portions having inner diameters larger than the outer diameters of the cylindrical members, the tubular members having slits formed in the cylindrical members each large enough to insert at least the lower ends of the axial insert portions; The connected molded product is moved above the deburring jig with the shaft-shaped insert portion on the lower side; temporarily inserting the lower ends of all of the plurality of axial insert portions into the corresponding slits of the cylindrical member; Thereafter, the plurality of axial insert portions are further inserted into the cylindrical member, and then By punching from above with the thrusting jig, burrs connecting each seal part are removed, A plurality of the sealing parts are obtained.

[0014] According to the above configuration, when the lower ends of the multiple axial inserts are provisionally inserted into the receiving jig body while aligning them with the slits of the tubular member, even if some of the axial inserts are tilted, the lower ends of the tilted axial inserts can be inserted into the slits without having to lift up the surrounding axial inserts. After the lower ends of all the axial inserts are provisionally inserted into the slits, the axial inserts can be inserted all the way into the tubular member, making the insertion process extremely easy. After insertion, a thrusting jig is used to remove burrs from the seal portion, allowing a single seal component to be easily and reliably obtained. [Effects of the Invention]

[0015] As described above, according to the present invention, the lower ends of multiple axial insert portions integrally molded into the sealing portion connected by burrs of elastomer material can be temporarily inserted into the corresponding slits of the tubular member, making it extremely easy to insert the axial insert portions into the tubular member and allowing the burrs on the sealing portion to be removed efficiently and stably. [Brief explanation of the drawings]

[0016] [Figure 1] 10A and 10B show a state in which a connected molded product is transported above the deburring jig, where FIG. 10A is a plan view and FIG. [Figure 2] (a) is a side view showing the state in which a connected molded product is transported above the deburring jig, (b) is a side view showing the state in which the lower end of the axial insert portion is temporarily inserted into the slit of the tubular member, and (c) is a side view showing the state in which the lower end of the axial insert portion is inserted into the upper part of the tubular member. [Figure 3] (a) is a side view showing the state in which all metal fittings have been temporarily inserted and then dropped to the back of the tubular member, (b) is a side view showing the state in which the thrusting jig is pushed down from above to cut off the burrs, and (c) is a side view showing the state in which the thrusting jig is removed and the individual sealing parts are taken out. [Figure 4] FIG. [Figure 5] Schematic diagrams showing the molding method for linked molded products, where (a) shows the metal fittings being inserted into the grooves of the lower mold, (b) shows the metal fittings inserted into the grooves, and (c) shows the state in which paste rubber has been placed on top of the metal fittings. [Figure 6] Schematic diagrams showing the molding method for linked molded products, where (a) shows the rubber being vulcanized after the upper mold is closed, (b) shows the upper mold being opened, and (c) shows the product being released from the mold. [Figure 7] 10A and 10B show a state in which a linked molded product is transported above a deburring jig according to a comparative example, where (a) is a front view showing the state in which the linked molded product is placed on top of a tubular member, and (b) is a front view showing the state in which a tilted metal fitting hits the tubular member and cannot be inserted all the way. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] 1 to 3 show a deburring jig 15 according to an embodiment of the present invention, and this deburring jig 15 is used to remove burrs 5 continuous with the seal portion 1 from a linked molded product 4 in which a plurality of seal parts 3 are connected in an aligned state by burrs 5 made of an elastomer material, the seal parts 3 including a seal portion 1 made of an elastomer material and a metal fitting 2 as an axial insert part integrally molded on one end side of the seal portion 1 and made of a material (e.g., metal) different from the elastomer material, to obtain a single seal part 3. The number of seal parts 3 connected to the linked molded product 4 is not particularly limited.

[0019] The deburring jig 15 is arranged to match the aligned metal fittings 2 and includes multiple tubular members 10 into which the lower ends of each metal fitting 2 can be inserted. The lower ends of these multiple tubular members 10 are fixed to a receiving jig body 11. The tubular members 10 are, for example, cylindrical, but may also be, for example, rectangular tubular to match the shape of a prismatic metal fitting.

[0020] The deburring jig 15 also includes a thrusting jig 14 having a cutter section 13 into which a plurality of seal sections 1 can be inserted and in which hole sections 13a having an inner diameter larger than the outer diameter of the cylindrical member 10 are aligned. The cutter section 13 serves to cut off burrs 5.

[0021] A slit 12 large enough to allow at least the lower end of the metal fitting 2 to be inserted therein is formed at the upper end of each tubular member 10. The slit 12 is formed as a cutout on one side of each of the aligned cylindrical tubular members 10.

[0022] As a result, the deburring jig 15 is configured so that the lower ends of multiple metal fittings 2 are temporarily inserted into the corresponding slits 12 of the tubular member 10, and then inserted into the interior of the tubular member 10, and then punched out from above with the thrusting jig 14, thereby removing the burrs 5 connecting each sealing portion 1.

[0023] -Method for forming linked molded products- First, a method for forming the linked molded product 4 will be briefly described.

[0024] 5(a), a mold 30 is prepared, which has an upper mold 31 in which mold grooves 31a capable of molding a plurality of seal portions 1 are aligned, and a lower mold 32 in which mold grooves 32a capable of inserting a plurality of metal fittings 2 are aligned. The mold 30 may be one that forms a single linked molded product 4, or one that can mold a plurality of linked molded products 4 at once.

[0025] Then, the metal fitting 2 is inserted into the die groove 32 a of the lower die 32 .

[0026] Next, as shown in FIG. 5(b), all the metal fittings 2 are inserted into the mold grooves 32a.

[0027] Next, as shown in Fig. 5(c), unvulcanized or semi-vulcanized paste-like rubber 6, which is an elastomer material, is placed on the multiple metal fittings 2. Alternatively, if the metal fittings 2 are to be embedded in the mold groove 32a, the paste-like rubber 6 is placed on top of the mold groove 32a.

[0028] Next, as shown in Figure 6(a), after closing the upper mold 31, the rubber is vulcanized at an appropriate temperature for a predetermined time. At this time, a larger amount of paste rubber 6 is supplied, so that the rubber flows into the flash cavity 31b that was originally located on the periphery of the mold groove 31a of the upper mold 31, forming flash 5 that connects the multiple seal portions 1. If the thickness of the flash 5 is too thin, the shaft-shaped insert portion 2 becomes unstable, and if it is too thick, material is wasted, so it is best to set the flash cavity 31b to an appropriate depth.

[0029] After a predetermined time has passed, the vulcanization of the rubber is completed and the rubber hardens. When the upper mold 31 is opened, as shown in FIG. 6(b), the state in which each seal portion 1 is connected by the sheet-like flash 5 can be observed.

[0030] Next, as shown in FIG. 6(c), the product, which is the linked molded product 4, is released from the mold.

[0031] -Method for removing burrs from a linked molded product according to a comparative example- First, a deburring jig 115 according to a comparative example is prepared, which has a cylindrical member 110 without slits 12. As shown in Fig. 7, in order to compare the effects of the slits 12 in the above embodiment, the deburring jig 115 of the comparative example has the same configuration as the above deburring jig 15, except that the slits 12 are not provided.

[0032] As shown in FIG. 7(a), when the sealing part 3 is connected by the burrs 5 made of an elastomer material, the burrs 5 are film-like, so the sealing part 3 is unstable and the metal fitting 2 is prone to tilting.

[0033] In this state, when attempting to insert the axial insert portion 2 into the tubular member 110 of the jig, as shown in Figure 7(b), even if most of the axial insert portion 2 is inserted into the tubular member 110, it is likely that only some of the tilted axial insert portions 2 will not be able to be inserted into the tubular member 110.

[0034] In such a case, the surrounding shaft-shaped insert portion 2 must also be removed from the cylindrical member 110 again, resulting in a repetition of the insertion work, which is very troublesome.

[0035] -Method for removing burrs from a connected molded product according to an embodiment- Next, the deburring jig 15 according to the present embodiment will be described.

[0036] As shown in Figures 1(b) and 2(a), the linked molded product 4 is moved above the deburring jig 15 with the metal fittings 2 on the lower side. Even at this time, when the sealing parts 3 are connected by the burrs 5 made of an elastomer material, the burrs 5 are film-like, which makes the sealing parts 3 unstable and causes the metal fittings 2 to tilt.

[0037] 2(b) and 2(c), the lower ends of all of the multiple metal fittings 2 are moved downward and horizontally at the same time, and provisionally inserted into the corresponding slits 12 of the tubular member 10. At this time, even if there is a tilted metal fitting 2, it is sufficient to slightly lift only that metal fitting 2 or only the multiple metal fittings 2 around it and provisionally re-insert them into the slits 12. Therefore, there is no need to lift and re-insert many metal fittings 2 as in the comparative example.

[0038] After all the metal fittings 2 have been temporarily inserted, as shown in Figure 3(a), several more metal fittings 2 are inserted deep inside the tubular member 10 so that the seal portion 1 rests on the upper end of the tubular member 10.

[0039] Thereafter, as shown in FIG. 3(b), the burrs 5 connecting the seal portions 1 are removed at once by punching from above with the hole 13a of the cutter portion 13 of the thrusting jig 14.

[0040] Finally, as shown in FIG. 3(c), the sealing parts 3 are removed from the pushing jig 14 and the cylindrical member 10, thereby obtaining a plurality of sealing parts 3.

[0041] In this way, by temporarily inserting the lower ends of multiple metal fittings 2 into the receiving jig body 11 while aligning them with the slits 12 of the tubular member 10, even if some of the metal fittings 2 are tilted, it is possible to insert only the lower ends of the tilted metal fittings 2 into the slits 12 without having to lift up the surrounding metal fittings 2. After the lower ends of all of the metal fittings 2 have been temporarily inserted into the slits 12, the metal fittings 2 can be inserted all the way into the tubular member 10, making the insertion process extremely easy. After insertion, burrs 5 are removed from the seal portion 1 using a thrusting jig 14, and a single seal component 3 can be obtained easily and reliably.

[0042] Furthermore, the metal fittings 2 connected by the film-like burrs 5 are prone to tilting and are difficult to insert into the tubular member 10, but since the slits 12 are formed in the tubular member 10, the insertion work becomes extremely easy by simply inserting into the slits 12 only the metal fittings 2 that are not inserted at an angle.

[0043] Therefore, with the deburring jig 15 of this embodiment, the lower ends of multiple metal fittings 2 integrally molded with the seal portion 1 connected by the burrs 5 of elastomer material can be temporarily inserted into the corresponding slits 12 of the tubular member 10, making it extremely easy to insert the axial insert portion 2 into the tubular member 10, and allowing the burrs 5 of the seal portion 1 to be removed efficiently and stably.

[0044] (Other embodiments) The present invention may be configured as follows in relation to the above embodiment.

[0045] That is, in the above embodiment, the sealing component 3 has been described as having a cylindrical rubber sealing portion 1 integrally molded on the upper end of a rod-shaped metal fitting 2 serving as an axial insert portion, but the axial insert does not necessarily have to be a rod-shaped metal, and may be any material that can be inserted into a mold during molding. Also, while rubber has been described as the elastomer material, thermoplastic resin materials, thermosetting resin materials, etc. may also be used. Furthermore, the present invention may also be applied to a linked molded product molded by injection molding.

[0046] It should be noted that the above-described embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or uses. [Explanation of symbols]

[0047] 1 Seal part 2 Metal fittings (shaft-shaped insert part) 3. Sealing parts 4 Connected molded products 5. Bali 6. Paste rubber 10 Cylindrical member 11 Jig body 12 Slit 13 Cutter section 13a Hole 14 Punching jig 15 Deburring jig 30 Molds 31 Upper mold 31a type groove 31b Burr cavity 32 Lower mold 32a type groove

Claims

1. A deburring jig for removing burrs from a connected molded product in which a plurality of sealing parts, each of which has a sealing part made of an elastomer material and a shaft-shaped insert part made of a material different from the elastomer material and integrally molded with the sealing part at one end thereof, are connected in an aligned state with the elastomer material, to obtain a single sealing part, a plurality of cylindrical members arranged in alignment with the aligned axial insert portions, into which the lower ends of the axial insert portions can be inserted; a receiving jig body to which the lower ends of the plurality of cylindrical members are fixed; a pushing jig into which a plurality of the seal portions can be inserted, the pushing jig having holes aligned and having an inner diameter larger than the outer diameter of the tubular member; a slit having a size large enough to allow at least the lower end of the shaft-shaped insert portion to be inserted into the upper end of the cylindrical member; The lower ends of the shaft-shaped inserts are temporarily inserted into the corresponding slits of the cylindrical member, and then inserted further into the cylindrical member. By punching them out from above with the thrusting jig, burrs connecting the seal portions can be removed. A deburring jig characterized by the above.

2. The flash of the connecting molded product is formed in a film shape that connects the outer peripheries of the sealing parts. The deburring jig according to claim 1 .

3. A linked molded product in which a plurality of seal parts, each of which has a seal part made of an elastomer material and a shaft-shaped insert part made of a material different from the elastomer material and integrally molded with the seal part at one end side, are linked together in an aligned state using the elastomer material; and a deburring jig including a plurality of cylindrical members aligned to match the aligned axial insert portions and into which the lower ends of the respective axial insert portions can be inserted; a receiving jig body to which the lower ends of the plurality of cylindrical members are fixed; and a thrusting jig into which the plurality of seal portions can be inserted and which has aligned hole portions having inner diameters larger than the outer diameters of the cylindrical members, the tubular members having slits formed in the cylindrical members each large enough to insert at least the lower ends of the axial insert portions; The connected molded product is moved above the deburring jig with the shaft-shaped insert portion on the lower side; temporarily inserting the lower ends of all of the plurality of axial insert portions into the corresponding slits of the cylindrical member; Thereafter, the plurality of axial insert portions are further inserted into the cylindrical member, and then, By punching from above with the thrusting jig, burrs connecting each seal part are removed, Obtaining a plurality of the sealing parts A method for removing burrs from a connected molded product.

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