JPS62297033A - Device for automatically separating seal ring - Google Patents

Abstract

PURPOSE:To make a highly efficient manufacture possible by arranging both middle punches for punching inner scraps of the insides of ring portions formed on a rubber sheet and outer punches for punching ring portions from outer scraps of the outside. CONSTITUTION:A punching device 5 for punching both inner scraps and ring portions in succession from a rubber sheet 2 provided with a plurality of the ring portions formed in advance by vulcanization by means of a vacuum press, etc. is arranged overhead. Further, a lower traverse device 51 to be horizontally reciprocated is arranged underneath. A middle punch board 9 is provided with a plurality of middle punches 8 projecting downward. First hydraulic cylinders 10 arranged between a base board 6 and the middle punch board 9 drive the middle punch board 9 up and down. An outer punch board 12 is provided with a plurality of outer punches 11 projecting downward. Second hydraulic cylinders arranged between the base board 6 and the outer punch board 12 drive the outer punch board 12 up and down.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to an automatic seal ring separation device.

[Conventional technology and its problems]

Conventionally, various methods have been known for forming seal rings such as O-rings and tongue seals, such as ① compression method, ② injection compression method, ③ injection runner gate method, and ③ injection cold launch method.

However, in either method, an operator manually removes the seal ring after molding. Moreover, the so-called deburring work is extremely troublesome, and the overall work efficiency is poor.

Therefore, the present inventor developed a device that simultaneously molds a large number of seal rings from rubber sheets using a vulcanization press.
This has already been proposed in Japanese Patent Application No. 40796/1983. However, even with this proposal, it is not sufficient in terms of whether it is possible to reliably and efficiently separate the ring part as a product from the rubber sheet in which multiple ring parts have been molded in the final process. I can't say I'm satisfied.

The purpose of the present invention is to automatically convert ring parts with high efficiency from the continuous belt-shaped rubber sheet described in the above proposal or (other than this) in which a plurality of ring parts are formed on a single rubber sheet. The aim is to provide a device for separating

[Means for solving problems]

The present invention is an automatic separating device that simultaneously separates each ring portion from a rubber sheet formed by vulcanization molding a plurality of ring portions, and punches inner scrap inside the ring portion formed on the rubber sheet. A middle punch and an outer punch for punching out the ring part as a product from the outer scrap outside the ring part formed on the rubber sheet are provided corresponding to the number of the ring parts, respectively, and an outer punch is provided. A punch unit body is formed by having a cylindrical shape and inserting the medium punch therein so as to be relatively slidable in the axial direction, and a plurality of the punch unit bodies are provided to be reciprocatingly movable in the vertical direction, and ,
A first step of punching the inner scrap with the middle punch while pressing and holding the ring part with the outer punch of the punch unit body.
a second receiver comprising a receiving surface member and an outer scrap abutting surface portion for receiving the outer scrap, and for punching a ring portion from the outer scrap by sliding the outer punch toward the tip side in the axial direction with respect to the middle punch; The surface members are provided so as to be stopped at predetermined positions below the plurality of punch unit bodies in alternating correspondence.

[Effect]

Receiving a plurality of internal scraps from one section of a rubber sheet or a band-shaped rubber sheet with a first receiving surface member,
It is punched out and removed, and then the ring portion is separated from the outer scrap while being received by a second receiving surface member to obtain a ring seal as a product.

Moreover, since there are as many punch units as the number of ring parts in one rubber sheet or one section,
All the inner scraps and ring parts can be separated at once from this single sheet or section.

The inner punch is slidably inserted into the cylindrical outer punch, and many punch units can be attached to a mounting board etc. in a compact manner. Therefore, even if the ring portion is densely formed in the rubber sheet, it can be sufficiently punched out.

While the outer punch of the punch unit presses and holds the ring portion, the inner scrap is punched out using the inner punch, allowing beautiful separation.

The outer scrap after separating the ring portion by working together with the second receiving surface member and the punch unit body may be removed by mechanical or other arbitrary methods.

〔Example〕

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 2 briefly illustrates the overall configuration of the automatic seal ring separation device 1. As shown in FIG. That is, in order to sequentially punch out inner scraps and ring parts from a rectangular rubber sheet 2 which has been vulcanized and formed into a plurality of ring parts using a vacuum press or the like, the punching device 5 is moved up and down. In addition, a lower traverse device 51 that reciprocates in the horizontal direction as shown by arrows A and B is provided below.

This punching device 5 includes a base 6, a plurality of medium punches 8...
A first fluid cylinder 10.10 is provided between the base 6 and the middle punching board 9 to drive the middle punching board 9 up and down. ,
An outer punch board 12 having a plurality of outer punches 11 projecting downward, and an outer punch board 12 provided between the base 6 and the outer punch board 12 to drive the outer punch board 12 up and down. It is composed of a second fluid cylinder 13. The base 6 is fixed to a base frame (not shown).

On the other hand, the lower traverse device 51 arranges the first receiving surface member 3 and the second receiving surface member 4 on the same plane, and below the first receiving surface member 3 and the second receiving surface member 4, there is a first hopper 15 for receiving the inner scrap 14, and
The second product receives the ring seal 16...
A hopper 17 is provided, and first and second wi output devices 58 and 59 are provided below the first hopper 15 and the second hopper 17, respectively, and the first and second receiving surface members 3,
4. The hopper 15.17 and the unloading device 58.59 are attached to a rail member (not shown) so as to be able to reciprocate in the directions of arrows A and B, and a drive device 7 that performs this reciprocating motion.
It is equipped with This drive device 7 is for switching the first receiving surface member 3 and the second receiving surface member 4 alternately to the lower position corresponding to the upper punching device 5, and is configured to operate by a screw shaft, a motor, or It consists of a fluid cylinder as shown in the figure. In addition, in place of the above-mentioned unloading device 58, 59,
It is also possible to install a receptor, but it is not shown.

As shown in FIGS. 3 and 4, the middle punch 8 has a solid cylindrical shape, and the outer punch 11 has a cylindrical shape, so that the middle punch 8 is slid relative to the hole 18 in the axial direction. The punch unit body 19 is formed by freely fitting and inserting. This punch unit body 19... is 11m & 1 (is the rubber sheet 2
The number of punch units 19 is set equal to the number of ring parts, and one punch unit body 19 is arranged so as to correspond to each position of the ring parts. Further, as shown in FIGS. 3 and 4, the middle punches 8 are fixed to the middle punch board 9 by bolt connection, and the outer punch 11 inserts the male threaded part of the outer punch 11 into the screw hole of the outer punch board 12. It is fixed with screws. Then, due to the relative extension and contraction positions of the first and second fluid cylinders 10.13 in FIG. The length protruding from the tip 11a of the punch 11 changes.

FIGS. 1 to 1 are enlarged explanatory diagrams of the main parts of this automatic seal ring separation device.

In FIG. 1I, the rubber sheet 2 has a ring portion 20 which is vulcanized using a no-burr mold, an inner scrap 14 and an outer scrap 21 inside the ring portion 20, and specifically, the ring portion 20 is The inner scrap 14 has a shape that becomes an O-ring when separated, and the inner scrap 14 is disk-shaped with a thin film part 14a in the center and a ring part 14b with a small rhombus in cross section around the periphery.
The outer scrubber knob 21 is mostly a thin film part 21a, and has a ring part 21b having a small rhombus in cross section at the boundary with the ring part 20.

FIG. 10 is a schematic cross-sectional view of the vicinity of the cavities of the upper and lower molds 22, 23 of the vulcanization press, and shows that there is a gap between the ring molding cavity 24 and the inner and outer small diamond-shaped ring molding parts 25, 25. This is a no-burr mold with cut portions 26 and 26. In addition, FIG. 9 (for reference) shows upper and lower molds 22 and 23 for a vulcanization press having a paring part 27 and 27 with a minute width.
A cross section of the main part is shown.

By the way, in Fig. 1 ■, the punch unit body 19...
A first receiving surface member 3 is located below, and the first receiving surface member 3 in the illustrated example shows a die 29 having a first hole 28 having an inner diameter slightly larger than the outer diameter of the medium punch 8. . The rubber sheet 2 is placed on the upper surface of the die 29 at a predetermined position. 1st
As described in FIG. Set it to a large diameter.If the cylinders 10 and 13 in Fig. 2 are both extended and the middle punch board 9 and the outer punch board 12 are lowered,
Inner punch 8 and outer punch 1 as shown by arrows C and E in Figure 1■
1 descends, and while pressing and holding the ring part 20 with the outer punch 11, the inner scrap 14 is punched out with the middle punch 8, as shown in FIG. The inner scrap 14 falls as indicated by arrow F and is received by the first hopper 15 in FIG. 2 or the like.

In the illustrated example, the middle punch has a conical recess 3o formed on its tip surface to form an outer peripheral edge cutting edge portion 31, and the outer punch 11 has a conical surface 32 formed on its tip surface and similarly forms an outer peripheral edge cutting edge 31. An edge cutting edge portion 33 is provided.

Thereafter, when the punch unit body 19 is raised in the direction of the arrow G as shown in FIG.
As shown by arrow H, (after inner scrap 14 is removed)
The rubber sheet floats up from the die 29.

Next, it is traversed in the direction of the arrow A in FIG. 1 and FIG. 11 is
The second receiving surface member 4 is made to face the second hole 35 of the die 34. The inner diameter of the second hole 35 is set to be slightly larger than the outer diameter of the outer punch 11.

From the position shown in Figure 1 ■, with both punches 8 and 11,
When lowered in the direction of arrow J, the outer scrap 21 is received using the top surface of the goo 34 as the contact surface 36, and the first
As shown in FIG. Vl, the ring part 20 is punched out by cutting from the outer cutout part 26. Therefore, as shown in Figure 1 ■,
When the inner punch 8 of the punch unit body 19 is raised relative to the outer punch 11 as shown by the arrow, the ring seal 16 as a product falls as shown by the arrow M.

In this state, if the punch unit body 19 is raised in the direction of arrow N in FIG. is left behind, so it can be removed in the direction of arrow P using other mechanical removal means, air blowing means, or the like. That is, as shown in FIG. 2, the outer scrap 21 is removed in the direction of arrow P. Note that, before that, the outer scrap 21 can be easily removed by horizontally moving the lower traverse device 51 in the direction of arrow B and then removing the outer scrap 21. Hereinafter, the operations from FIG. 1 may be repeated.

In addition, each guide 29.3 of the first and second receiving surface members 3.4
4, a plastic plate can also be used in addition to a metal plate.

Next, FIG. 5 shows another embodiment in which cushion plates 37 and 38 made of rubber sponge material or the like are used in place of the gouers 29 and 34, respectively. However, the overall configuration may be the same as that in FIG. 2.

The steps in FIGS. 1 to 2 will be explained in order. Punch unit body 1
Reference numeral 9 has the same structure as in the previous embodiment, and the number of inner punches 8 and outer punches 11 corresponding to the ring portions 20 of the rubber sheet 2 is the inner punch board 9 (shown in FIG. 2). , are attached to the outer punch board 12, respectively.

First, in Fig. 5 (■), the rubber sheet 2 is molded by the non-burr mold shown in Fig. 1O, and the rubber sheet 2 is placed on the first receiving surface member 3, and the rubber sheet 2 is placed on the first receiving surface member 3, and the If you lower the middle punch 8 and the outer punch 11 as shown in Figure 5■
As shown in the figure, the outer punch 11 is used to press and hold the ring portion 20, and the middle punch 8 is used to punch out the inner scrap 14. At this time, the corresponding portion of the soft cushion plate 37 is elastically deformed into a concave shape to facilitate punching.

Thereafter, when the punch unit body 19 is raised in the direction of arrow G as shown in FIG.
Further, as in the previous embodiment, the outer diameter dimension d of the middle punch 8 is set, and the ring portion 20 is brought into close contact with the outer peripheral surface of the middle punch 8 to lift the rubber sheet and float it from the cushion plate 37. Next, the receiving surface member 3.4 is traversed in the direction of arrow A, the first receiving surface member 3 is switched from the second receiving surface member 4, and the second receiving surface is placed below the punch unit body 19. Part 4
correspond.

Next, when lowered in the direction of arrow J, the cushion plate 38 of the second receiving surface member 4 is used as the contact surface 36, and the outer scrap 2
1 is received, but when only the outer punch 11 inside the punch unit body 19 is further lowered, the ring portion 20 is punched out from the outer cutout portion 26 and the cushion plate 38 is received. The ring part 20 enters into. Therefore, as shown by the arrow in Fig. 5, the punch unit body 19
When the ring part 20 is raised, the ring part 20 is on the upper surface of the cushion plate 38 which has been restored to a flat surface by the elastic force, and the outer scrap 21
is lifted and floated together with the outer punch 11. Therefore, as shown by arrow P, the outer scrap 21 may be removed by mechanical removal means or by hand. Thereafter, (or at the same time) the lower traverse device 51 is horizontally moved in the direction of arrow B and restored to the position shown in FIG.

By the way, in FIG. 1 and FIG. 5, when using each rubber sheet 2 having a rectangular shape, the ring portion 20
It is necessary to make the position of each punch unit body 19 correspond accurately to each position of . As a means for this purpose, draw a peripheral edge of the rubber sheet 2 such as a rectangular shape and a predetermined division line, and use that part as a thick part or a bent part to form the guide 29.34 of each station 3.4. Fit into the reference groove for positioning, or cushion plate 37, 38
It is preferable to position it by fitting it into a reference recessed groove provided around the periphery, a rigid member, or a predetermined partition wall.

Next, FIGS. 6, 7, and 8 show examples in which the rubber sheet 2 is applied to a seal ring forming apparatus 39 using a band-shaped rubber sheet. Seal ring forming device 39
, a feed roll 40 that feeds out the rubber sheet 2 wound into a roll, a vulcanizing press 41 that has upper and lower molds 22 and 23 and forms the ring part 20 in a predetermined pinch, and a vulcanizing press 41 that feeds out the rubber sheet 2 wound into a roll, and A feeding mechanism 42 consisting of a pair of upper and lower rollers that feed 2 at a constant pitch in the direction of the arrow Q, an automatic seal ring separating device 1 according to the present invention, and a winding of the outer scrap 21 that remains in the band shape after punching. It is composed of a take-up roll 43 and the like.

The vulcanization press 41 includes a pair of upper and lower heating plates 44.44 for heating the rubber sheet 2, upper and lower platens 45.45, and upper and lower molds 22.23, and a press section that moves up and down by a hydraulic unit (not shown). It is composed of 46 mag.

The automatic seal ring separating device 1 is constructed in substantially the same manner as shown in FIG. 2 described above. The slight difference is that the hopper and conveyor are replaced by receptacles 47,48.

If tension is applied to the thin strips of the band-shaped rubber sheet 2, there is a risk that it will stretch and tear (break), so as shown in FIG.
It is preferable that the rubber core portion 50.50 is formed by forming the rubber core portion 9 into a bulging shape. The core 50.50 is preferably formed using the vulcanizing press 41, and the cross-sectional shape of the core 50 can be freely set to a circular shape, a square shape, or the like. It is also preferable to form three or more in the intermediate portion parallel to the left and right edge portions 49 and 49 as appropriate. In addition, in any of the embodiments described above, it is also possible to freely use a ring seal other than an O-ring.

〔Effect of the invention〕

The present invention exhibits the following significant effects with the above-described configuration.

(2) The traverse of the receiving surface member 3.4 makes it easy to obtain scrap and ring seal separately, thereby eliminating the need for subsequent sorting operations.

■It can be applied to either individual rubber sheets or belt-shaped rubber sheets, and in particular, it is possible to simultaneously and automatically manufacture ring seals such as ○ rings with high efficiency from rubber sheets molded with a large number of ring parts.

■Each of the multiple punch uniform gutter bodies has a compact structure in which the inner and outer punches are inserted with the same axis on the inside and outside, so they can be closely attached to the punch mounting board, so that the same A large number of ring parts can be provided on a rubber sheet of this size.

■The ring part is beautifully punched, resulting in a product (ring seal) with excellent sealing properties and stable quality.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the main parts of the automatic seal ring separation device of the present invention in cross section and explaining the operation in the order of steps;
Fig. 2 is a simplified diagram of the overall configuration of this automatic separation device, Figs. 3 and 4 are enlarged cross-sectional views of its main parts, Fig. 5 is a cross-sectional explanatory view of main parts of another embodiment, and Fig. 6 is a diagram of another embodiment. FIG. 7 is a simplified plan view of the overall configuration of the embodiment, FIG. 8 is a perspective view of an example of a rubber sheet, and FIGS. 9 and 10 are diagrams showing specific examples of different molds. FIG. DESCRIPTION OF SYMBOLS 1... Seal ring automatic separation device, 2... Rubber sheet, 3... First receiving surface member, 4... Second receiving surface member, 8
...Inner punch, 11...Outer punch, 14...Inner punch, 19...Punch unit body, 20...Ring part, 21...Outer scrap. Patent applicant Dainichi Nippon Electric Cable Co., Ltd. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. An automatic separation device that simultaneously separates each ring portion from a rubber sheet formed by vulcanization molding a plurality of ring portions,
An inner punch for punching out the inner scrap inside the ring part formed on the rubber sheet, and an outer punch for punching out the ring part as a product from the outer scrap outside the ring part formed on the rubber sheet, The outer punch is provided in a cylindrical shape, and the inner punch is fitted into the outer punch so as to be relatively slidable in the axial direction to form a punch unit body, and a plurality of The punch unit body of the book is provided to be reciprocally movable in the vertical direction, and the ring portion is pressed and held by the outer punch of the punch unit body, and the inner scrap is punched out by the inner punch. and a second receiving surface member having an outer scrap abutting surface portion for receiving the outer scrap and punching a ring portion from the outer scrap by sliding the outer punch toward the tip side in the axial direction with respect to the middle punch. are provided at predetermined positions below the plurality of punch unit bodies so as to be stopped in alternating correspondence.