JP4359971B2 - Slide core guide unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slide core guide unit used for guiding the movement of a slide core through an inclined pin that is inclined with respect to the moving direction of an ejector plate and penetrates a receiving plate in an undercut process of an injection mold. About.
[0002]
[Problems to be solved by the invention]
A slide core guide unit described in Japanese Patent No. 2523093 includes a base having a pair of guide grooves facing each other, and a pair having a bearing hole that is slidably disposed in each guide groove of the base. And a pin holder having a shaft fitted in each bearing hole of the slide plate. The slide core guide unit has its base fixed to the ejector plate, and A pin holder is connected to one end of an inclined pin and used for an injection mold mechanism.
[0003]
By the way, in the slide core guide unit, one end of the inclined pin is inserted into a hole formed in the pin holder, and the one end of the inclined pin and the pin holder are connected to each other. Is pivotable through the shafts fitted in the respective bearing holes of the slide plate, when the pin holder is inserted into the hole of the pin holder at one end of the inclined pin, the pin holder freely and freely It is difficult to rotate and hold the hole of the pin holder in a predetermined position, and workability is extremely poor.
[0004]
In order to improve the workability of inserting the inclined pin into the hole of the pin holder, a punch flaw is formed on the shaft, and a minute protrusion based on the punch flaw is formed on the shaft. Although the pivotability with respect to the slide plate may be slightly deteriorated so that the pin holder does not rotate freely during the insertion operation, this means always keeps the minute protrusions based on punch scratches to the desired size. For this reason, the width accuracy after the assembly of the pin holder and the slide plate is affected, and the pivotability of the pin holder with respect to the slide plate may vary greatly. It is not always satisfactory.
[0005]
The present invention has been made in view of the above-described points, and an object of the present invention is to reliably give a desired braking to the rotation of the pin holder with respect to the base. An object of the present invention is to provide a slide core guide unit that can be easily inserted into a hole of a pin holder and can improve work efficiency.
[0006]
[Means for Solving the Problems]
The slide core guide unit according to the first aspect of the present invention moves the slide core through an inclined pin that is inclined with respect to the moving direction of the ejector plate and penetrates the receiving plate in the undercut processing of the injection mold. It is used for guiding and has a pair of guide grooves facing each other, and a base fixed to the ejector plate, and each guide groove of the base with respect to the movement direction of the ejector plate The slide plate is slidably arranged in the intersecting direction, and has a slide plate having a bearing hole and a shaft inserted into the bearing hole of the slide plate, and rotates to the base via the shaft and the slide plate. A pin holder having a holder main body that holds one end of the inclined pin and is mounted so as to be freely movable in a direction that intersects the moving direction of the ejector plate freely. Here, between the holder body and the base, the braking ring to provide a braking rotation of the holder body relative to the base is interposed.
[0007]
According to the slide core guide unit of the first aspect, in order to apply the braking by the braking ring against the rotation of the holder body with respect to the base, this braking can be set to a desired constant value. As a result, the holder body can be held in the desired position without any unintentional rotation, and the work efficiency can be improved by making it easy to insert one end of the inclined pin into the hole in the holder body. In addition, the width accuracy after the pin holder and the slide plate are assembled to each other is not affected.
[0008]
In the slide core guide unit according to the second aspect of the present invention, in the slide core guide unit according to the first aspect described above, an annular groove is formed in the shaft, and the brake ring is attached to the shaft in the annular groove. And interposed between the holder body and the base.
[0009]
In the slide core guide unit according to the third aspect of the present invention, in the slide core guide unit according to the second aspect, the outer peripheral surface of the brake ring is in elastic contact with the slide plate in the bearing hole, and Friction resistance is applied to the rotation of the holder body.
[0010]
In the slide core guide unit of the fourth aspect of the present invention, in the slide core guide unit of the first aspect described above, an annular groove is formed in the slide plate in the bearing hole, and the brake ring is formed in the annular groove. It is mounted on a slide plate and is interposed between the holder body and the base.
[0011]
In the slide core guide unit according to the fifth aspect of the present invention, in the slide core guide unit according to the fourth aspect, the inner peripheral surface of the brake ring is in elastic contact with the shaft in the bearing hole, and Friction resistance is applied to the rotation of the holder body.
[0012]
In the present invention, even if the brake ring is attached to the shaft and interposed between the holder main body and the base as in the second aspect, the holder is attached to the slide plate as in the fourth aspect. The brake ring may be interposed between the main body and the base. In any case, since the brake ring is mounted on the shaft in the annular groove, the brake ring can be held in a predetermined position.
[0013]
In the present invention, as in the third and fifth aspects, the outer peripheral surface or the inner peripheral surface of the brake ring may be elastically contacted with the slide plate or the shaft. A bearing hole may be formed in the holder body, and the outer peripheral surface or inner peripheral surface of the brake ring may be elastically brought into contact with the holder main body or the shaft in the bearing hole. What is necessary is just to give braking to rotation of a holder main body.
[0014]
According to the present invention, preferably, the brake ring is formed of an O-ring made of an elastic material such as rubber as in the sixth aspect, and the shaft is integrally formed with the holder main body as in the seventh aspect. Is formed. Instead of the seventh aspect, the shaft may be formed separately from the holder body, and the shaft may be inserted into a bearing hole formed in the holder body.
[0015]
The holder main body preferably has a hole for holding one end of the inclined pin as in the eighth aspect of the present invention, and usually one end of the inclined pin inserted into the hole is a set screw or the like. This prevents it from coming out of the hole. Instead of the eighth aspect, the holder body may be configured by having a protrusion for holding one end of the inclined pin. In this case, one end of the inclined pin forms a hole into which the protrusion is inserted. Thus, it is preferable to form a hollow shape.
[0016]
In the slide core guide unit according to the ninth aspect of the present invention, in the slide core guide unit according to any one of the first to eighth aspects, the base includes a pair of base members disposed opposite to each other, and the pair of base members. The base member is connected to each other by bridging the base member, and a guide groove is formed in each of the opposing surfaces of the pair of base members.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention and its embodiments will be described with reference to preferred examples shown in the drawings. The present invention is not limited to these examples.
[0018]
1 to 4, the slide core guide unit 1 of the present example has a pair of guide grooves 2 and 3 facing each other, a base 5 fixed to an ejector plate 4 described later, and a guide for the base 5. The slide plate 8 is slidably disposed in each of the grooves 2 and 3 so as to be slidable in the direction B that intersects the moving direction A of the ejector plate 4 in this example, and in the present example, and has bearing holes 6 and 7, respectively. And 9 and shafts 10 and 11 inserted in the bearing holes 6 and 7 of the slide plates 8 and 9, and the base 5 can be rotated in the R direction via the shafts 10 and 11 and the slide plates 8 and 9. In addition, the pin holder 14 is mounted so as to be movable in a direction B that intersects the moving direction A of the ejector plate 4 and is orthogonal in this example, and has a holder body 40 that holds one end 13 of an inclined pin 12 described later. With That.
[0019]
The base 5 has a U-shaped cross section, and a pair of base members 21 and 22 arranged opposite to each other, and connecting members 23 and 24 that bridge the pair of base members 21 and 22 and connect each other. The guide grooves 2 and 3 are formed on the opposing surfaces of the pair of base members 21 and 22, respectively. The connecting member 23 is disposed on one end face 25 and 26 of the base members 21 and 22 and is fixed to the end faces 25 and 26 with bolts 27. The connecting member 24 is also the other end face of the base members 21 and 22. 28 and 29, and fixed to the end faces 28 and 29 by bolts 30. Each of the base members 21 and 22 is formed with a through hole 32 through which a bolt 31 (see FIGS. 5 and 6) for fixing the base 5 to the ejector plate 4 is inserted.
[0020]
Each of the slide plates 8 and 9 having the bearing holes 6 and 7 has a rectangular shape or a strip shape, and faces the base members 21 and 22 and the holder main body 40 in each of the slide plates 8 and 9. In each surface, a plurality of circular solid lubricant bodies 35 are dispersed and exposed and embedded in order to obtain smooth sliding.
[0021]
The pin holder 14 includes cylindrical shafts 10 and 11 and a holder body 40 having a substantially rectangular parallelepiped shape. The holder body 40 has shafts 10 and 11 on both side surfaces 41 and 42, respectively. A hole 43 that is formed integrally and that holds a hole 43 for holding one end 13 of the inclined pin 12 and a bolt 44 that fixes the one end 13 of the inclined pin 12 inserted into the hole 43 to the hole 43. 45 is formed.
[0022]
Annular grooves 51 and 52 are formed on the shafts 10 and 11, respectively, and brake rings 53 and 54 made of elastic O-rings are attached to the annular grooves 51 and 52. The brake rings 53 and 54 are The outer peripheral surfaces 55 and 56 elastically contact the slide plates 8 and 9 in the bearing holes 6 and 7, respectively, and provide a frictional resistance force to the rotation of the holder body 40 in the R direction with respect to the slide plates 8 and 9. Thus, braking is applied to the rotation of the holder body 40 in the R direction with respect to the base 5.
[0023]
As shown in FIGS. 5 and 6, the slide core guide unit 1 is formed by injection molding metal such that the base 5 is fixed to the ejector plate 4 with bolts 31 and the holder body 40 holds one end 13 of the inclined pin 12. In the undercut process of the mold mechanism, it is used to guide the movement of the slide core 62 of the injection mold mechanism through the inclined pin 12. The injection mold 61 is composed of a movable mold plate 63, a fixed receiving plate 64, and the slide core 62, and in this example, a product 66 having an undercut portion 65 is molded. The inclined pin 12 is inclined with respect to the moving direction A of the ejector plate 4 and slidably passes through the receiving plate 64 via the guide bush 71. The slide core 62 is fixed.
[0024]
At the time of demolding of the product 66 having the undercut portion 65 after the molding, the movable side mold plate 63 is moved from the state shown in FIG. 5 toward the A direction, and the ejector plate 4 is moved in synchronism with this. By moving in the direction, the slide core guide unit 1 moves in the A direction, and the inclined pin 12 slides with respect to the receiving plate 63 via the guide bush 71 to separate the slide core 62 from the receiving plate 64. In this separation, as shown in FIG. 6, the other end 72 of the inclined pin 12 moves in the B direction, the slide core 62 is separated from the undercut portion 65, and the product 66 can be taken out. When the slide core guide unit 1 moves in the B direction at the other end 72, the movement in the B direction with respect to the ejector plate 4 at one end 13 moves along the guide grooves 2 and 3 through the slide plates 8 and 9 of the pin holder 14. Guide with direction movement.
[0025]
By the way, when the slide core guide unit 1 is used in an injection mold mechanism including the injection mold 61, the base 5 is fixed to the ejector plate 4 with the bolt 31 as described above, and the one end 13 of the inclined pin 12 is fixed. Is fixed and held in the hole 43 of the holder body 40. In the slide core guide unit 1, braking is applied to rotation of the holder body 40 in the R direction relative to the base 5 by the braking rings 53 and 54. This braking can be set to a desired constant value, and thus the holder body 40 can be held in a predetermined position by reliably preventing the holder body 40 from rotating freely in the R direction by its own weight. As a result, the one end 13 of the inclined pin 12 can be easily inserted into the hole 43 of the holder body 40, and the work efficiency can be improved. The brake rings 53 and 54 are mounted on the shafts 10 and 11 in the annular grooves 51 and 52 without affecting the width accuracy after the assembly of the inner holder 14 and the slide plates 8 and 9. Therefore, the brake rings 53 and 54 can be held at predetermined positions.
[0026]
In the above example, the brake rings 53 and 54 are mounted on the shafts 10 and 11, but instead, the brake rings 53 and 54 are mounted on the slide plates 8 and 9 in the bearing holes 6 and 7 to perform braking. The inner peripheral surfaces of the rings 53 and 54 may be brought into elastic contact with the shafts 10 and 11 in the bearing holes 6 and 7, and the slide plates 8 and 9 are orthogonal to the moving direction A of the ejector plate 4. However, the present invention is not limited to this, and may be slidable in an oblique direction other than the direction B perpendicular to the moving direction A of the ejector plate 4.
[0027]
【The invention's effect】
According to the present invention, it is possible to reliably apply desired braking to the rotation of the pin holder with respect to the base, and thus it is possible to easily insert the inclined pin into the hole of the pin holder, thereby improving work efficiency. An obtained slide core guide unit can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of a preferred embodiment of the present invention.
FIG. 2 is an exploded perspective view of a part of the example shown in FIG.
FIG. 3 is a front sectional view of the example shown in FIG. 1;
4 is a side sectional view of the example shown in FIG. 1. FIG.
FIG. 5 is an explanatory diagram of an example in which the example shown in FIG. 1 is used for an injection mold.
6 is an operation explanatory diagram of the example shown in FIG. 5;
[Explanation of symbols]
1 Slide core guide unit 2, 3 Guide groove 5 Base 6, 7 Bearing hole 8, 9 Slide plate 10, 11 Shaft 14 Pin holder 53, 54 Brake ring

Claims (10)

Used to guide the movement of the slide core via an inclined pin that is inclined with respect to the direction of movement of the ejector plate and slidably passes through the guide bush in the undercut process of the injection mold. The slide core guide unit includes a base fixed to the ejector plate, a pair of slide plates each having a bearing hole, and a pin holder. of has a facing surface a pair of guide grooves formed on each of the pair of base members of the base member Toko, a pair of slide plates, to each of the guide grooves of said one pair, the direction of movement of the ejector plate are arranged slidably in a direction intersecting with the pin holder holds a pair of shafts which are inserted respectively into the bearing hole of the slide plate of the one pair, one end of the tilt pin Hol Has a over body, the holder body is linearly movable seated in the direction crossing the moving direction of the rotatably and ejector plate to the base through a shaft and a pair of slide plates of said one pair and which, between the ho Ruda body and the base, the braking ring to provide a braking rotation of the holder body relative to the base are intervening, a pair of facing sides of the opposing surface and the holder body of the pair of the base member A plurality of solid lubricants are dispersed and exposed and embedded on each surface of the slide plate, and a pair of shafts are formed on both side surfaces of the holder body respectively facing the pair of slide plates. Each of the brake rings is a slide core guide that elastically contacts the slide plate or shaft in the bearing hole to give a frictional resistance to the rotation of the holder body relative to the slide plate. Unit.   The slide core guide unit according to claim 1, wherein an annular groove is formed in the shaft, and the brake ring is mounted on the shaft in the annular groove and interposed between the holder body and the base.   The slide core guide unit according to claim 2, wherein the outer peripheral surface of the brake ring is in elastic contact with the slide plate in the bearing hole so as to give a frictional resistance to rotation of the holder body with respect to the slide plate.   The slide core according to claim 1, wherein an annular groove is formed in the slide plate in the bearing hole, and the brake ring is mounted on the slide plate in the annular groove and interposed between the holder body and the base. Guide unit.   The slide core guide unit according to claim 4, wherein the inner peripheral surface of the brake ring is in elastic contact with the shaft in the bearing hole so as to give a frictional resistance to rotation of the holder body with respect to the slide plate.   The slide core guide unit according to any one of claims 1 to 5, wherein the brake ring is an O-ring.   The slide core guide unit according to any one of claims 1 to 6, wherein the shaft is formed integrally with the holder body.   The slide core guide unit according to any one of claims 1 to 7, wherein the holder body has a hole for holding one end of the inclined pin.   The slide core guide unit according to any one of claims 1 to 8, wherein the base includes a connecting member that bridges and connects the pair of base members.   An injection mold mechanism using the slide core guide unit according to any one of claims 1 to 9.

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