JPS63151441A - Automatic separating device for seal ring - Google Patents

Abstract

PURPOSE:To separate a ring section as a product out of a rubber sheet by sliding inner and outer punches relatively in the axial direction after punching with the inner and outer punches. CONSTITUTION:A punch unit body 8 is lowered as shown by the arrow mark G, and a pinch-off section 30 is cut with a nose section 25 of the outer peripheral edge of an outer punch 7 to separate a ring section 1 and an outer scrap 6. Then, by lowering the outer punch 7 and an inner punch 5, a pinch-off section 28 is cut with the inner punch 5 to separate an inner scrap 4 and the ring section 1. Next, while the outer scrap 6 is held by a receiving board 3, by lifting up the punch unit body 8 shown by the arrow mark H, the ring section 1 separated from the inner and outer scraps 4 and 6 is brought into contact with the outer peripheral face of the inner punch 5 and also with the conical face 24 of the outer punch 7, being floated up together with the punch unit body 8. By removing the outer scrap 6 in the direction of arrow mark K, sliding relatively the inner and outer punches 5 and 7 in the axial direction, and putting the end of the inner punch 5 into the outer punch 7, a seal ring 31 is dropped and can be taken out of a rubber sheet 2.

Description

[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 lip seals, such as ■ Combresolon method, ■ Injection compression method, ■ Injection runner gate method, and ■ Injection cold runner 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 present invention solves these conventional problems and uses the continuous belt-shaped rubber sheet described in the above proposal or (other than this) a rubber sheet in which a plurality of ring parts are formed on each rubber sheet. , an object of the present invention is to provide a device that automatically separates ring portions with high efficiency.

[Means for solving problems]

The automatic seal ring separating device of the present invention is an automatic separating device that simultaneously separates each ring portion from a rubber sheet formed by vulcanization molding of a plurality of ring portions; an inner punch for punching out the inner scrap of the inner punch; and a cylindrical outer punch that is slidably slidable in the axial direction relative to the inner vaginal punch and is fitted on the outer side of the vaginal punch to punch out the ring part as a product from the outer scrap outside the ring part. and a punch, punching out the inner scrap with the middle punch and punching out the ring part with the outer punch, and separating the ring part from the inner and outer scraps while holding it between the outer punches in the acid, and a plurality of punch unit bodies that separate the separated ring portion from the inner and outer punches by relatively sliding the inner and outer punches in the axial direction; an outer scrap abutment surface that receives the outer scrap; a plurality of circular holes through which the tip of the inner punch is inserted and removed while holding the ring portion; and the outer punch receives the outer scrap at the scrap contact surface and and a receiving plate for separating the outer scrap and the ring part, and for separating the inner scrap and the ring part by the middle punch while holding the ring part in the circular hole.

[Effect]

A rubber sheet formed by vulcanizing and molding a plurality of ring parts as described above is placed on a receiving plate so that each ring part corresponds to a circular hole, and the ring is punched with a medium punch. By punching out the inner scrap of the part and punching out the ring part as a product from the outer scrap with an outer punch, the ring part can be separated from the inner and outer scrap while being held between the inner and outer punches. Furthermore, by sliding the middle and outer punches in the axial direction relative to each other from this state, the ring portion can be taken out.In other words, the punching with this middle and outer punch and the relative axis of the vaginal middle and outer punches By sliding in the direction, the ring part as a product (in other words,
It is possible to separate the so-called ring portion to which Paris is not attached.

〔Example〕

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

FIG. 2 shows an automatic seal ring separating device according to the present invention, in which a rectangular rubber sheet 2 is placed, on which a plurality of ring portions 1 are formed by vulcanization using a vacuum press or the like. A middle punch 5 punches out the scrap 4 inside the ring part 1 formed on the disk 3 and the rubber sheet 2 (see FIG. 1).
and an outer punch 7 for punching a ring part l as a product from an outer scrap 6 outside the ring part 1.

Further, a punch unit body 8 is formed with the inner and outer punches 5.7.

The receiving plate 3 is provided with a number of circular holes 9 corresponding to the ring portions 1 of the rubber sheet 2, and the circular holes 9 have a large diameter portion 10 at the upper end thereof. There is.

This receiving board 3 is fixed to a base 12 to which block bodies 11 are fixed at both ends, and furthermore, a total of four pillars 13, two on each side, are erected at both ends of the receiving board 3. ing.

In addition, each support 13 is provided with a resilient member 1 such as a coil spring.
4 is fitted onto the outside, and an outer punch holding plate 15 for holding the outer punch 7 and an inner punch holding plate 16 for holding the middle punch are also attached.

That is, through-holes 17 are provided at both ends of the outer punch holding plate 15, and the above-mentioned pillars 13 are inserted into the through-holes 17, and through-holes 18 are provided at both ends of the middle punch holding plate 16. Being done,
The support column 13 is inserted therethrough. That is, the support column 13 is inserted through the resilient member 14, the through hole 17 of the outer punch holding plate 15, and the through hole 18 of the middle punch holding plate 16 in a skewered manner.

The middle and outer punch holding plates 15 and 16 are respectively movable up and down by up and down swinging members such as fluid cylinders (not shown). The resilient member 14 always resiliently urges the outer punch holding plate 15 upward, and the outer punch holding plate 15 and the receiving plate 3
Normally, a predetermined distance is maintained between the two as shown in the figure.

As shown in FIGS. 3 and 4, the middle punch 5 is made of a cylindrical body, and has a conical surface 19 on its tip.

The outer peripheral edge cutting edge portion 20 is formed, and the base end portion is formed into a small diameter portion 21, and the small diameter portion 21 is fitted into a mounting hole 22 formed in the middle punch holding plate 16. ing. Reference numeral 23 denotes a retaining ring fitted to the small diameter portion 21 to prevent the small diameter portion 21 of the medium punch 5 from coming off from the attachment hole 22 of the medium punch holding plate 16. The outer punch 7 is made of a cylindrical body that is fitted onto the inner punch 5 so as to be slidable in the axial direction, and has a conical surface 24 formed on its tip surface to form an outer peripheral edge cutting edge portion 25. The base end of the extranuclear punch 7 is formed into a small diameter part 26 like the middle punch 5, and the small diameter part 26 is fitted into a mounting hole 27 formed in the outer punch holding plate 15. Reference numeral 28 denotes a retaining ring formed on the small diameter portion 26, which prevents the small diameter portion 26 of the extranuclear punch 7 from coming off from the attachment hole 27 of the outer punch holding plate 15.

Therefore, if the outer punch holding plate 15 is lowered or the middle punch holding plate 16 is raised from the state shown in FIG. 7, and the outer punch holding plate 15 can be raised from the state shown in FIG.
3, the outer peripheral edge cutting edge 20 of the middle punch 5 can be made to protrude from the outer punch 7, as shown in FIG.

The inner and outer punches 5 and 7 attached to the inner and outer punch holding plates 15 and 16 in this manner are used as the punch unit body 8, and the number of ring portions l of the rubber sheet 2 (that is, the number of circular holes 9 of the receiving plate 3) is determined. Place it so that it corresponds to

Further, the above-mentioned rubber sheet 2 is vulcanized and formed using a no-burr mold, and the ring portion 1 has a shape that becomes an O-ring when separated, and as shown in FIG. 1I, the inner scrap 4 is
A thin film part 4a in the center and a ring part 4b with a small rhombus in cross section around it.
Most of the outer scrap 6 is a thin film part 6a, and has a ring part 6b having a small rhombus cross section at the boundary with the ring part 4. In this case, medium punch 5
The outer diameter dimension A is set to be the same as or slightly larger than the inner diameter dimension B of the cutout section 28 between the small rhombus molded part 4b and the ring section 1, and the small diameter section 29 of the circular hole 9 It is set slightly smaller than the inner diameter dimension C of. Also, outside punch 7
The outer diameter of the hole 9 is set to be the same as or slightly smaller than the inner diameter E of the cutout 30 between the small rhombus molded part 6b and the ring part 1. It is set slightly smaller than the inner diameter dimension F of the portion 10. In other words, the tip of the medium punch 5 can be freely inserted into the small diameter portion 29 of the circular hole 9.

FIG. 1 shows an enlarged view of the main parts of this automatic seal ring separation device.

That is, with this device, the ring portion 1 is separated from the rubber sheet 2.
In order to separate the rubber sheets, first, as shown in FIG. 2, the rubber sheet 2 is placed on the receiving plate 3 so that each ring portion 1 corresponds to each circular hole 9. That is, the outer scrap 6 is received on the outer scrap abutting surface 32 which is the upper surface of the receiving plate 3. Then, put the Chugai punch 5°7 in the state shown in Figure 1 ■ (that is,
The outer peripheral edge cutting edge 20 of the middle punch 5 is covered by the outer punch 7)
The punch unit body 8 is shown in the arrow G as shown in FIG.
As shown in FIG. 1 (2), the cutout portion 3o is cut by the outer peripheral edge cutting edge portion 25 of the outer punch 7 to separate the ring portion 1 and the outer scrap 6. Then, the ring portion 1 with the inner scrap 4 attached thereto is pressed by the outer punch 7 and fitted into the large diameter portion 10 of the circular hole 9, and the outer punch is held until the ring portion 1 is held in the large diameter portion 1o. 7 is lowered, the middle punch 5 is further lowered, and the middle punch 5 cuts the cutout part 28 to separate the inner scrap 4 and the ring part 1 as shown in FIG. . At this time, the tip of the middle punch 5 is slightly protruded downward from the circular hole 9, and the inner scrap 4 falls from the receiving plate 3.

Next, from this state, while pressing the outer scrap 6 against the receiving plate 3 using a holding means (not shown), the punch unit body 8 is raised as shown by the arrow H in FIG. Due to its elastic force, the ring portion 1 separated from the inner punch 5 comes into pressure contact with the outer circumferential surface of the inner punch 5 and also presses against the conical surface 24 of the outer punch 7, and is held between the inner and outer punches 5 and 7. Together with the unit body 8, it floats up as shown in FIG. Also, outside school? The knob 6 is the receiving board 3
Since it remains on the upper surface, it is removed in the direction of the arrow using other mechanical removal means or air blowing means.

From this state, the middle and outer punches 5.7 are slid relative to each other in the axial direction, and the middle and outer punches 5.7 are moved as shown in FIG.
If the tip of the seal ring 31 is placed inside the outer punch 7, the seal ring 31 as a product will fall as shown by the arrow.
The seal ring 31 can be taken out from the rubber sheet 2.

The present invention is not limited to the illustrated embodiment, and the design may be changed without departing from the gist of the present invention. Although the double cut portions 28.30 are cut simultaneously with the edge edge portions 20.25 on the same plane, the middle punch 5 is made to protrude downward from the outer punch 7 to cut the hard cut portion 28, and then the cut portion 28.30 is cut at the same time. You are free to cut the length of 30. Further, it is also possible to use something other than an O-ring as the ring seal.

〔Effect of the invention〕

The automatic seal ring separation device of the present invention includes a middle and outer punch 5.
7 and the relative sliding of the inner and outer punches 5 and 7 in the axial direction, the ring portion as a product can be separated from the rubber sheet 2, and the work efficiency is greatly improved. In addition, each of the plurality of punch unit bodies has an inner punch and an outer punch arranged on the same axis, so that
It has a compact structure, and a large number of ring parts can be separated at once from a rubber sheet provided with a large number of ring parts, making it extremely useful.

[Brief explanation of the drawing]

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 front view of the device, and FIGS. 3 and 4 are enlarged sectional views of the main parts. 1...Ring part, 2...Rubber sheet, 3...Receptacle, 4...Inner scrap, 5...Medium punch, 6...
- Outer scrap, 7... Outer punch, 8... Punch unit body, 9... Circular hole, 32... Outer scrap contact surface.

Claims (1)

[Scope of Claims] 1. An automatic separating device that simultaneously separates each ring portion from a rubber sheet formed by vulcanization molding of a plurality of ring portions, comprising: an inner punch for punching scrap; and a cylindrical outer punch that is fitted onto the inner punch so as to be slidable in the axial direction relative to the inner punch and punches the ring part as a product from the outer scrap outside the ring part. , punching out the inner scrap with an inner punch and punching out a ring part with an outer punch, separating the ring part from the inner and outer scraps while holding it between the inner and outer punches, and a plurality of punch unit bodies that separate the separated ring portion from the inner and outer punches by relatively sliding the inner and outer punches in the axial direction; an outer scrap abutment surface that receives the outer scrap; and the ring portion. a plurality of circular holes through which the tip of the medium punch is inserted and removed while holding the medium punch;
The outer scrap is received on the scrap abutting surface, the outer scrap is separated from the ring part by the outer punch, and the inner scrap is separated from the inner scrap by the middle punch while the ring part is held in the circular hole. An automatic seal ring separation device comprising: a receiving plate for separating the ring portion from the ring portion;