JP2953248B2 - Automatic molding machine for rubber molded products with metal fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically molding a cylindrical rubber molded product having a ring-shaped metal fitting having a projection on the outer periphery of one end of a molded product main body. The present invention relates to an automatic molding machine for rubber molded products with metal fittings.

[0002]

2. Description of the Related Art Conventionally, for example, JP-A-63-37908 discloses a technique relating to an automatic molding machine for an elastomer molded article. With the automatic molding machine of this technology,
The strip material made of the elastomer is cut by the material cutting device to obtain a chip material. Next, the chip-shaped material is transported to the molding machine by the material transport means, and the transported chip material is loaded into the material loading section of the molding machine by the loading means. Then, the loading means is moved to the molding machine in the mold open state,
Stop when it reaches the predetermined position. After the molding, the molded articles are automatically collected by a molded article receiving chute, a conveying duct, a blower, etc., which are disposed at the molded article drop position.

According to this technique, it is possible not only to automatically mold an elastomer molded article, but also to automatically collect the molded article.

[0004]

In recent years, among various rubber molded products such as boots for protecting a shaft joint portion of an automobile, metal fittings are attached to a rubber molded product main body to maintain its strength. Are being produced.

[0005] However, since the elastomer molded product obtained in the prior art is the rubber molded product itself, it has been difficult to apply the elastomer molded product as it is to a product having metal fittings attached thereto.

That is, the work of transporting the metal fittings to a predetermined position and the work of installing the metal fittings one by one to attach the metal fittings to the rubber molded product have conventionally been performed manually. Performing these tasks manually requires poor workability, low productivity, cost and labor.
There was a lot of waste.

Further, when the rubber molded product attached to the outer peripheral portion of the core in the mold at the time of molding has a metal fitting attached to one end thereof, the rubber is removed by using the take-out device in the above-mentioned prior art. It was difficult to remove the molded product.
That is, since the metal fitting is firmly adhered to the rubber molded product, there is a problem that the rubber molded product cannot be easily released from the core.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to attach a ring-shaped metal fitting having a projection on its outer circumference to the outer circumference of one end of a molded article main body. When molding a cylindrical rubber molded product,
It is also possible to automate the transportation and installation of the metal fittings to a predetermined position, thereby improving workability and productivity, and to easily release the rubber molded product with metal fittings after molding. An object of the present invention is to provide an automatic molding machine for a rubber molded product with metal fittings.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a cylindrical rubber having a ring-shaped metal fitting having a projection on the outer periphery of one end of a molded article main body. The gist of the present invention is a molding machine for automatically molding a molded product, which is an automatic molding machine for a rubber molded product with metal fittings, which includes at least the following devices (A) to (E).

(A) having at least one support hole,
An outer cylinder that is fitted externally in a state where a plurality of the fittings are stacked,
A large-diameter portion substantially vertically inscribed in the outer cylinder, an inner shaft having a small-diameter portion having an outer diameter slightly smaller than the large-diameter portion, which is disposed inside the outer cylinder so as to be vertically movable, and in the support hole. Placed,
When the support hole and the small-diameter portion face each other, the support hole is accommodated inward from the outer peripheral surface of the outer cylinder, and when the support hole and the large-diameter portion face each other, the outer peripheral surface of the outer cylinder is outward. A fitting magazine device comprising: a fitting locking member movably housed so as to protrude.

(B) An upper arm and a lower arm for supporting or releasing the metal fittings falling from the metal fittings magazine device by performing mutually opposing approaching / separating operations, and actuating the two arms to perform reciprocal workings. A metal fitting conveying device comprising: an operating means for causing the metal fittings to drop one by one; and a metal fitting setting means for conveying and setting the dropped metal fitting to a predetermined position.

(C) A molding device provided with a core for molding a molded article main body of the rubber molded article. (D) A fitting transfer device for transferring the one fitting transferred to the predetermined location by the fitting transfer apparatus to a predetermined position in the molding apparatus.

(E) a main body having a sealing surface that is movable in the axial direction of the main body of the molded product and has a sealing surface against which the one end of the main body of the molded product abuts; A support for movably provided in the circumferential direction of the metal member, and a tubular body attached to the support and for restricting the expansion of the molded article body when the molded article body is expanded by gas pressure. A gas blowing hole for blowing gas between the molded product main body and the core to release the rubber molded product from the core; At least the surface of the peripheral part on the side of the bracket is a tapered surface that is narrowed toward the inner peripheral side, and when the support is moved in the inner peripheral direction, one end of the rubber molded product is pressed against the sealing surface of the main body. Molded product take-out device configured to be operated.

[0014]

According to the above construction, in the metal fittings magazine device, the metal fitting externally fitted to the outer cylinder is such that when the support hole and the large-diameter portion face each other, the metal fitting projects outside the outer peripheral surface of the external cylinder. Locked by a stop member. Due to this locking, downward movement of the metal fitting is suppressed, and the metal fitting is held on the outer periphery of the outer cylinder. Then, when the inner shaft is moved relative to the outer cylinder such that the support hole and the small-diameter portion face each other, the metal fitting locking member is retracted inside from the outer peripheral surface of the outer cylinder. For this reason, the holding of the metal fitting is released, and the metal fitting can be detached from the outer cylinder.

Further, in the metal-carrying device, the upper arm and the lower arm perform the approaching / separating operation with respect to the metal fitting that can be dropped from the metal-fitting magazine device so as to be opposite to each other by the operating means of the metal fitting supporting and releasing means. And when the upper arm is separated, the lower arm approaches,
The metal fitting is supported by the lower arm. On the other hand, when the lower arm is separated, the upper arm approaches, and the next, that is, the metal fitting thereon is supported by the upper arm. At this time, one metal fitting located at the lowermost part falls with the separating operation of the lower arm. Then, the dropped metal fitting is transported to a predetermined position and set by the metal fitting setting means. Therefore, the plurality of metal fittings having the projections on the outer periphery that have been stacked are conveyed one by one to a predetermined position.

Further, one metal fitting conveyed to a predetermined position is transferred to a predetermined position in the molding apparatus by a metal fitting transferring device. Then, in a state where the metal fitting is installed at a predetermined position, a molded product main body of a rubber molded product is molded by a molding device having a core. That is, the cylindrical rubber molded product main body is molded around the core with the metal fitting attached to the outer periphery of one end of the molded product main body.

Then, the sealing surface of the main body of the take-out device comes into contact with one end on the side where the metal fitting is attached, and the support moves to the inner peripheral side. Then, since the tapered surface of the support body is reduced in width toward the inner peripheral side, one end side of the molded article main body is supported by the tapered surface. In addition, the metal fitting is pressed to one end side by moving on the tapered surface. Therefore, one end of the rubber molded product is pressed against the sealing surface of the main body of the take-out device, and the two are sealed. In this state, gas is blown out from the gas blowout holes. By this blowing, gas is blown out between the rubber molded product and the core, and the rubber molded product is separated from the core. In this state, the main body of the take-out device and the support are moved in the axial direction of the rubber molded product, whereby the rubber molded product with the metal fitting is easily released from the core.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
19 will be described. FIG. 1 is a schematic perspective view showing an automatic molding machine 1 for a rubber molded product G with metal fittings in the present embodiment. The molding machine 1 is provided with an automatic material supply device 2 and a molded product automatic collection device 3. The automatic material supply device 2 includes a material cutting unit (not shown) that cuts a rubber band material to obtain a chip material, and a material conveyance unit 4 that conveys the chip material to a molding device C described below. A material loading means (not shown) for loading the chip-shaped material into the material loading section (pot) of the molding apparatus C is provided. Since each of these means has almost applied the technology disclosed in JP-A-63-37908,
A detailed description thereof will be omitted.

Further, the molded article automatic collection device 2 comprises a molded article receiving chute 5 and a molded article receiving chute 5 arranged at a position where the rubber molded article G (see FIG. 9) falls in the automatic molding machine 1.
And a blower (not shown) for supplying air into the duct 6. Since this technique is also disclosed in the above-mentioned publication, detailed description is omitted.

Further, the automatic molding machine 1 in this embodiment
Is provided with a fitting magazine device A, a fitting transport device B, a forming device C, a fitting transfer device D, and a molded product take-out device E, in addition to the devices 2 and 3 described above. Next, the devices A to E will be described in detail.

That is, on the molding machine stand 7 of the automatic molding machine 1, as shown in FIG. The column 8 is provided with a pair of upper and lower magazine holders 9 and 10. The upper magazine holder 9 is provided rotatably with respect to the column 8. On the other hand, the lower magazine holder 1
Numeral 0 is provided so as to be vertically movable with respect to the column 8 by driving a cylinder rod 12 in a cylinder 11 provided in the middle of the column 8. A hardware magazine device (hereinafter simply referred to as “magazine”) A is mounted and fixed to the magazine holders 9 and 10 in a suspended state. However, in the present embodiment, a plurality of magazines A are prepared in advance, and with the rotation operation of the plurality of upper magazine holders 9 (only one is shown in the drawing), the magazine A and the other magazines which are stored in advance are separated. Replaceable.

FIG. 3 is a longitudinal sectional view showing the magazine A of this embodiment, and FIG. 4 is a sectional view taken along line XX of FIG. As shown in these figures, the magazine A has a cylindrical outer cylinder 14. The outer cylinder 14 is made of stainless steel, and the upper part thereof is gripped by the lower magazine holder 10. Further, a plurality of (three in this embodiment) support holes 15 extending in the radial direction are provided in a lower position in the figure.
In this support hole 15, the hole diameter on the outer peripheral surface side is formed smaller than the hole diameter on the inner peripheral surface side, and the bottom on the inner peripheral surface side is formed to be slightly lower than the bottom on the outer peripheral surface side. I have.

Inside the outer cylinder 14, an inner shaft 16 also made of stainless steel is disposed so as to be vertically movable. The inner shaft 16 includes a large-diameter portion 17 located at the center, a small-diameter portion 18 located at a lower portion thereof, and a head portion 19 located at an upper portion and protruding upward. The large diameter portion 17 has an outer diameter substantially equal to the inner diameter of the outer cylinder 14. The small-diameter portion 18 is formed such that a gap between the small-diameter portion 18 and the outer cylinder 14 does not become larger than the thickness of the outer cylinder 14. Furthermore, the upper end of the head 19 is enlarged in diameter, and the enlarged diameter portion is gripped by the upper magazine holder 9.

A coil spring 20 is provided on the outer periphery of the inner shaft 16 in the inner space of the outer cylinder 14. The inner shaft 16 is always positioned below by the urging force of the coil spring 20.

Further, a ball 21 is provided in the support hole 15 as a metal fitting locking member made of stainless steel. When the ball 21 and the large diameter portion 17 of the inner shaft 16 face each other, the ball 21 is
4 and is projected from the outer peripheral surface of the outer cylinder 14. However, the support hole 15 is formed so as to decrease in diameter toward the outer periphery so that the ball 21 does not come out of the support hole 15 outward. On the other hand, when the ball 21 and the small diameter portion 18 of the inner shaft 16 face each other, the ball 21 is housed inside the outer cylinder 14 more than the outer peripheral surface.

At a position above the ball 21 around the outer cylinder 14, a plurality of metal fittings R are externally fitted so as to be stacked. On the other hand, as shown in FIG. 2, inside a table 38 provided on the molding machine base 7, a positioning pin 22 is provided at a position corresponding to the magazine A so as to be able to protrude and retract. That is, the pin cylinder 23 is disposed below the table 38,
As the rod 24 in 3 moves up and down, the positioning pin 22 comes and goes.

Next, the metal-carrying device B will be described.
The bracket transport device B includes a bracket support release unit 26 and a bracket setting unit 27. That is, a fitting support release means 26 is provided below the support 8, and a fitting setting means 27 is provided on the table 38.

FIG. 5 is a perspective view schematically illustrating the bracket supporting and releasing means 26. As shown in the figure, a chuck cylinder 28 as an actuating means is provided at a lower portion of the support column 8, and a pair of left and right rods 29 (see FIG. 6) is provided on both sides of the chuck cylinder 28. Are connected so as to be able to reciprocate in the left-right direction. Support plates 31A and 31B are fixed to the lower surface of the front end of the chuck plate 30 so as to extend inward.

The first support plate 31A on the right in FIG.
Arm LA₁Is attached so as to extend forward. This
First lower arm LA₁Projecting almost in the middle of
L-shaped first upper arm UA with respect to KI 32A₁Gatori
It is fixed. This first upper arm UA₁Is
First lower arm LA₁With respect to the protrusion of the fitting R
Higher than the thickness of the flange
First upper arm UA ₁And the first lower arm LA₁With
Only one fitting R is held in between.

On the other hand, the left support plate 31B
The lower arm LA ₂ are attached so as to extend forward, the first lower arm with the lower arm LA ₁ L
A is formed. This second protrusion 32B formed substantially in the middle portion of the lower arm LA _2, a second upper arm UA ₂ is attached and fixed in L-shaped. Forming an upper arm UA in the second upper arm UA ₂ is provided so as to face the upper arm UA ₁ of the first, these first upper arm UA ₁ second upper arm UA ₂ doing. Then, as shown in the figure, when the chuck plate 30 is in contact with the chuck cylinder 28, the upper arm UA opens and at the same time the lower arm LA closes. On the other hand, as shown in FIG. 6, when the rod 29 is driven so as to project and the chuck plate 30 spreads outward, the upper arm UA closes and the lower arm LA opens at the same time. A constricted portion 33 is formed inside each of the arms LA ₁ , LA ₂ , UA ₁ , and UA ₂ , and when the upper arm UA or the lower arm LA is opened, the bracket is moved with a stroke as small as possible. R can be dropped.

Next, the fitting setting means 27 will be described. As shown in FIGS. 2 and 7, the bracket setting means 27 includes an air cylinder 35 and a piston rod 3 movably disposed in the air cylinder 35 in the front-rear direction (the left-right direction in the drawing).
6 and a push-pull arm 37 attached to the tip of the piston rod 36. The push-pull arm 37 passes below the chuck cylinder 28, and a fitting holder 37a (see FIG. 7) is provided at the tip of the push-pull arm 37 so that the fitting R can be accurately captured.

The table 38 has a rod passage 38a so that the movement of the piston rod 36 is not hindered.
Is recessed. As shown in FIG. 8, on both sides of the push-pull arm 37, guide rails 39 having a substantially L-shaped cross section from the upper surface of the table 38 are formed so as to cover the push-pull arm 37. When it moves, it is supported so that it does not deviate from a predetermined position and can move accurately in the front-rear direction.

As shown in FIG. 7, a stopper 40 is provided at the front end of the table 38, and a fitting take-out portion 41 for transferring the fitting R is formed immediately before the stopper 40. In addition, a fitting confirmation sensor 42 (not shown) is provided near the stopper 40 so that the presence or absence of the fitting R can be confirmed.

Next, the molding apparatus C will be described. FIG.
As shown in FIG. 1, the molding apparatus C includes a mold including an upper mold 44, a lower mold 45, and a core 46 (see FIG. 11), and has an actuator (not shown) for driving these. ing. However, the core 46 is driven by its actuator to drive a molded product take-out device E described later.
Can be moved to a predetermined location. In addition, core 46
An engagement recess 47 is formed in the upper end portion of FIG.
reference).

Here, the rubber molded article G molded by the molding apparatus C will be described. As shown in FIG. 9, the rubber molded product G of this embodiment is formed by a known injection molding method.
And a metal fitting R having a flange portion Rf as a projection attached to the outer periphery of one upper end in the drawing. The molded article main body 50 includes an upper tubular portion 50a as one end portion, a lower tubular portion 50b, and a bellows portion 50c between them. In addition, as a material constituting rubber, ethylene-
Propylene-diene copolymer rubber (EPDM) is used. The rubber molded product G is used as a dust boot for protecting a shaft joint of an automobile.

Next, the metal fitting transferring device D will be described.
As shown in FIG. 1, the metal-carrying device D has a chuck 51 which can be moved up and down and left and right by an actuator (not shown). And, the above-mentioned metal fitting conveying device B
As a result, one metal fitting R conveyed to the metal fitting removing portion 41 is transferred to a predetermined position in the molding apparatus C with the operation of the chuck 51.

Next, the molded product removing device E will be described. The molded product take-out device E is provided at a different place (right side in FIG. 1) from the molded device C. As shown in FIG. 10, an air cylinder 56 is fixed on the base 53,
The piston rod 55 projects downward from the lower part of the air cylinder 56 through the through hole 57 of the base 53. The piston rod 55 supports a quadrangular prism-shaped main body 58, which can be moved up and down by an air cylinder 56. A support plate 59 projects laterally from the upper end of the main body 58, and a guide rod 60 that extends upward is fixed to the distal end of the support plate 59. The guide rod 60 is mounted on the base 5.
3 extend through an insertion hole 61 provided through the main body 5.
The main body 58 is prevented from rotating when the upper and lower parts 8 move up and down. A rubber sealing piece 62 that forms a part of the main body 58 is fixed to a lower portion of the main body 58.

As shown in FIG. 11, the lower surface of the seal piece 62 is a seal surface 62a with which the upper cylindrical portion 50a of the molded article body 50 comes into contact. In the center of the lower part inside the seal piece 62, a gas blowing hole 63 is opened downward. The gas blow-out holes 63 can blow high-pressure air supplied from the air supply holes 64 downward. Note that the gas may be an inert gas such as nitrogen. The core 46 is provided at the ceiling of the gas outlet 63.
An engagement projection 65 for positioning and supporting the projection is provided. The engagement protrusion 65 is adapted to be engaged in the engagement recess 47 of the core 46.

A pair of movable pieces 66 formed in a plate shape are supported on both sides of the main body 58 by guide rods 66a, and are capable of reciprocating in the left-right direction in FIG. That is,
The reciprocating movement of the movable piece 66 is performed by the pressure of the air sent or removed from the air holes 67a and 67b formed in the main body 58. Below the movable piece 66, a V-shaped chuck 68 as a support is fastened and fixed by screws. The lower portion of the V-shaped chuck 68 is formed in a thin plate extending left and right, and the inner peripheral side is formed in a flat V-shape (see FIG. 12). As shown in FIG. 13, the upper surface of the inner peripheral portion of the V-shaped chuck 68 has a tapered surface 69 whose width decreases toward the inner peripheral side, and the lower surface also has a tapered surface 70 whose width decreases toward the inner peripheral side. It has become.

On the lower surface of the V-shaped chuck 68, a cylindrical body 71 whose upper end is formed in a flange shape is fastened and fixed by screws. The rubber molded product G and the like are accommodated and arranged in the cylindrical body 71.

A rubber detection sensor 72 for detecting the presence or absence of rubber constituting the molded article main body 50 is provided on the inner surface of the cylindrical body 71. This sensor 72 is formed of a phototube switch. If the release of the rubber molded product G is unsuccessful and the rubber remains on the core 46, the sensor 72 can detect the remaining rubber. Further, the sensors 42, 7
2 and the like are connected to a controller (not shown). Then, based on input signals from the respective sensors, the controller operates various actuators provided in the automatic molding machine 1 or stops the operations. For example, when the rubber detection sensor 72 detects that the release of the rubber molded product G was not successful, the controller stops all the subsequent molding operations.

Next, the operation of the automatic molding machine 1 configured as described above will be described. First, when transporting the metal fittings R, the required number of metal fittings R are externally fitted to the outer cylinder 14 of the magazine A, as shown in FIG. At this time, due to the urging force of the coil spring 20 and the gravity of the inner shaft 16, the inner shaft 1
6 is located below, and inside the ball 21,
The large diameter portion 17 of the inner shaft 16 is located. For this reason,
The ball 21 projects from the outer peripheral surface of the outer cylinder 14. Therefore, the metal fitting R is locked by the frictional force with the ball 21 and does not fall downward.

When the magazine A is set in the metal fitting conveying device B, as shown in FIG.
10 causes the head 19 of the inner shaft 16 and the outer cylinder 14 to be gripped. At this time, the rod 24 is moved upward, and the positioning pin 22 projects from the table 38. The magazine A is accurately set at a predetermined position by relatively inserting the pin 22 into the outer cylinder 14.

In this state, the lower magazine holder 10 is moved downward. At this time, since the head 19 is held by the upper magazine holder 9, the inner shaft 16 does not move. On the other hand, as the lower magazine holder 10 moves downward, the outer cylinder 14 moves downward against the urging force of the coil spring 20. That is, the outer cylinder 14 and the inner shaft 16
Move relative to each other in a direction away from each other. By this movement, as shown in FIG. 14, the small diameter portion 18 of the inner shaft 16 is located inside the ball 21, and a gap is formed between the small diameter portion 18 and the outer cylinder 14. For this reason, as shown in FIG. 15, the inside of the support hole 15 is formed to be lower toward the inside so that the ball 21 rolls inward, so that the ball 21 rolls until it comes into contact with the gap with the inner shaft 16.
The metal fitting R, which has been locked by the ball 21 protruding from the outer cylinder 14, is now in a free state in which it is not locked by anything. Therefore, the metal fitting R can be dropped downward by gravity. That is, the metal fitting R can be detached from the magazine A.

As described above, in this embodiment, the metal fitting R is locked by the ball 21 during normal transportation, so that the metal fitting R does not fall or scatter.
Therefore, a large amount of metal fittings R can be easily transported.

When the metal fitting R is disengaged from the magazine A, the ball 20 rolls inward from the outer peripheral portion of the outer cylinder 14 by relatively moving the inner shaft 16 and the outer cylinder 14. Therefore, the metal fitting R can be easily dropped and separated from the outer cylinder 14.

Now, in the bracket supporting and releasing means 26,
First, as shown in FIG.
The seat 30 comes into contact with the chuck cylinder 28.
ing. That is, the first lower arm LA₁And the first
Upper arm UA₁Is located to the left in the figure.
2 lower arm LA_TwoAnd second upper arm UA_TwoIs a figure
It is located close to the middle right. Therefore, the lower arm LA
Are closed, and the upper arm UA is open. So
Therefore, as shown in FIG. ₁But that
Supported by the lower arm LA at the flange Rf
As a result, all the loaded metal fittings R are
Supported by the LA. Also, at this time,
Between the lower arm LA and the upper arm UA,
Metal fitting R ₁Only intervening.

Next, as shown in FIG. 6, rods 29 protrude from both sides of the chuck cylinder 28. Then, the pair of chuck plates 30 spread outward, respectively.
Contrary to the previous state, the upper arm UA closes almost simultaneously with the opening of the lower arm LA. For this reason, the metal fitting R located above the upper arm UA is received by the upper arm UA. Therefore, as shown in FIG.
Only ₁ falls and rests on the table 38, while the remaining fittings R are supported by the upper arm UA.

At the next opportunity, the state returns to the state shown in FIG. 16, and the fitting R is supported by the lower arm LA. By repeating the above operation, the loaded metal fittings R are placed on the table 38 one by one. At this moment, the rod 24 provided in the table 38 is moved down, and the positioning pin 22 is immersed in the lower part of the table 38.

Next, in the state shown in FIG. 2, the piston rod 36 is extended from the air cylinder 35. Then, as shown in FIG. 7, the push-pull arm 37 attached to the tip of the piston rod 36 extends, and a metal holder 37 a at the tip of the push-pull arm 37 is mounted on a table 38 by one metal fitting. Capture R (R ₁ ). Then, the push-pull arm 37 pushes the flange Rf of the fitting R until the flange Rf comes into contact with the stopper 40, and the fitting R is set in a predetermined fitting take-out portion 41. At this time, since the push-pull arm 37 is guided by the guide rail 39, the push-pull arm 37 does not shift in the vertical and horizontal directions. Therefore, the fitting R is accurately conveyed to the fitting removing section 41. Then, after being transported to the metal fitting removal section 41,
The push-pull arm 37 is returned to the original position. At this moment, the rod 24 is moved upward, and the positioning pin 22 is projected above the table 38.

[0051] Then, metal extraction portion 41 fitting R ₁ set in, the presence by fitting confirmation sensor 42 is confirmed. After the confirmation, the chuck 51 of the metal-carrying device D is supplied to a predetermined position of the molding device C by driving. In this way, the fitting setting means 27
Performs the above operation each time the fitting R is placed on the table 38.

As described above, in this embodiment, the upper arm UA is opened using the metal fitting support releasing means 26, and
From a state where the lower arm LA is closed, closes the opposite upper arm UA with it, and by the state of the lower arm LA is opened, only the hardware R ₁ at the bottom was made to fall. Therefore, even if a plurality of fittings R are stacked,
The metal fittings R (R ₁ ) can be reliably dropped and placed on the table 38 one by one.

In this embodiment, the fitting setting means 27
And the push-pull arm 37 is used to push the metal fitting R placed on the table 38 to the metal fitting take-out part 41, so that it can be automatically transported to a predetermined position. At this time, since the fitting holder 37a is formed at the tip of the push-pull arm 37, the fitting R can be reliably caught. Further, the push-pull arm 3
Since 7 is guided and supported by the guide rail 39, it can be reliably transported to the metal fitting removal section 41.

At the same time, the presence of the metal fitting R conveyed to the metal fitting removing section 41 can be confirmed by the metal fitting confirmation sensor 42. Thereafter, the metal fitting R can be supplied to a predetermined position of the forming apparatus C by the chuck 51 of the metal fitting transferring apparatus D.

After the fitting R is supplied to the predetermined position of the molding apparatus C as described above, the EPDM is placed in the cavity formed by the upper mold 44, the lower mold 45, and the core 46.
Is injected. After the EPDM is filled and vulcanized, the mold is opened to form the molded article main body 50, and the upper cylindrical portion 50 of the molded article main body 50 is formed.
As a result, a rubber molded product G having the fitting R attached thereto is obtained. However, at this time, the rubber molded product G is in a state of being attached to the surface of the core 46.

Thereafter, the rubber molded product G is moved together with the core 46 into the molded product removal device E. That is, the rubber molded product G and the core 46 are accommodated in the tubular body 71. Next, the operation of the molded product removal device E will be described. As shown in FIGS. 10 and 11, first, the movable piece 66 is moved in the left-right direction so as to be separated from the main body 58 by supplying air from the air hole 67 a of the main body 58 of the molded product removing device E. On the other hand, the main body 58
Of the core 46 by a jig (not shown).
Is fixed, the rubber molded product G attached to the outer peripheral surface of the core 46 is positioned. After that, the air cylinder 5
6 is driven to move the main body 58, the movable piece 66, the V-shaped chuck 68, and the tubular body 71 downward integrally. And
Seal surface 62a on the lower surface of seal piece 62 inside main body portion 58
Then, one end of the molded product main body 50 on the side of the upper tubular portion 50a is brought into contact with the molded product main body 50.

At this time, the engagement protrusion 65 of the seal piece 62 is engaged with the engagement recess 47 at the upper end of the core 46. By this engagement, the core 46 is positioned and supported. Then, the movable piece 66 is supplied by supplying air from the air hole 67b.
Is moved so as to close to the main body 58 side. Then, as shown in FIG. 13, the tapered surface 69 of the V-shaped chuck 68,
70 enters the lower side of the fitting R to support the rubber molded product G.
At this time, since the inner peripheral portion of the V-shaped chuck 68 has a tapered surface 69, this portion easily enters the lower surface of the fitting R.
In the drawings showing the operation of FIG. 13 and the like, the V-shaped chuck 68 is cut in the direction of a plane 45 ° in order to make it easier to understand the state of supporting the fitting R.

Then, the movable piece 66 is further moved to the main body 58 side. Then, the tapered surface 6 of the V-shaped chuck 68
9 is formed in a tapered shape whose width decreases toward the inner peripheral side, so that the fitting R is lifted up somewhat with the above movement. Therefore, the upper tubular portion 50a of the molded article main body 50 is strongly pressed by the sealing surface 62a, and the upper tubular portion 50a is pressed.
a and the sealing surface 62a are reliably sealed.

In this state, as shown in FIG. 18, high-pressure air is supplied from the air supply hole 64, and this air is blown downward from the gas blowing hole 63. At this time, as described above, the upper tubular portion 50a of the molded product main body 50 and the sealing surface 62a of the main body portion 58 are securely sealed. Therefore, there is no possibility that air leaks from that portion. Accordingly, the high-pressure air blown out from the gas blowout holes 63 is supplied to the molded product main body 5.
It flows between 0 and the core 46, and the molded article main body 50 expands. Then, the expanded molded product main body 50 hits the inner peripheral surface of the tubular body 71. The contact with the cylindrical body 71 prevents the molded article main body 50 from expanding more than necessary. At this time, the lower surface of the inner peripheral portion of the V-shaped chuck 68 is tapered 69
Therefore, the swollen molded article main body 50 is prevented from hitting this portion, and therefore, there is no possibility that the molded article main body 50 is damaged.

Next, in this state, the air cylinder 56 is driven to move the main body 58 upward. By this upward movement, the movable piece 66, the V-shaped chuck 68, and the cylindrical body 71 move upward integrally. Therefore, as shown in FIG. 19, the tapered surface 69 on the inner peripheral surface of the V-shaped chuck 68 raises the fitting R. On the other hand, the core 46 is fixed by a jig (not shown). Therefore, only the rubber molded product G is separated from the core 46 and moves upward together with the main body 58 and the like. Therefore, the rubber molded product G is released from the core 46.

Next, by supplying air to the air holes 67a, the two movable pieces 66 are moved to the left and right, respectively, so as to be separated from the main body 58. Along with this movement, the rubber molded product R falls without a supported portion. Thus, the rubber molded product G released from the core 46 is taken out of the take-out device.

The dropped rubber molded product G is collected by the automatic molded product collection device 3 described above. That is, the rubber molded product G is put into the molded product receiving chute 5, and is conveyed to the collection position via the conveying duct 6 by the air blown out by the blower.

As described above, in the molded product take-out apparatus E of this embodiment, the metal fitting R is supported by the V-shaped chuck 68, and the taper surface 69 provides a seal between the upper cylindrical portion 50a and the seal surface 62a. Is secured. Then, in this state, air is blown between the rubber molded product G and the core 46. For this reason, even if the metal fitting R adheres to the rubber molded product G, the metal fitting rubber molded product G can be easily separated from the core 46. At this time, since the metal fitting R of the rubber molded product G is lifted by the V-shaped chuck 68, the rubber molded product G can be reliably released from the core 46.

In this embodiment, a rubber detection sensor 72 for detecting the presence or absence of rubber on the inner surface of the cylindrical body 71 is provided.
Was arranged. Therefore, even if the release of the rubber molded product G is not successful and the rubber remains on the core 46, the same can be reliably detected by the sensor 72. As a result, the subsequent molding operation can be stopped by the controller, and it is possible to prevent a failure of the molding device C or the like that occurs when the molding is continued.

It should be noted that the present invention is not limited to the above-described embodiment, and may be implemented as follows by appropriately changing a part of the configuration without departing from the spirit of the invention. (1) Each arm LA ₁ , LA ₂ , U in the above embodiment
A ₁ and UA ₂ may be shaped as shown in FIG. 20, for example. That is, each arm LA ₁ , LA ₂ , UA ₁ ,
A step portion α may be formed in the UA ₂ , and the fitting R may be gripped by the step portion α. By adopting this configuration, the fitting R can be securely held without the fitting R moving left and right due to the operation of the arms LA ₁ , LA ₂ , UA ₁ , and UA ₂ .

(2) In the above embodiment, the chuck plate 30 and each arm L
A ₁ , LA ₂ , UA ₁ , UA ₂ are transferred to chuck cylinder 2
Although the opening and closing are performed in parallel with the rotation of the chuck cylinder 8, the chuck cylinder 28 may be configured to rotate about a central portion of the chuck cylinder 28 as a rotation center.

(3) Hardware support release means 26 of the above embodiment
, The first lower arm LA ₁First top against
Arm UA₁And a second lower arm L
A_TwoThe second upper arm UA_TwoAnd chuck
The upper arm UA, the lower arm UA
The upper arm UA is opened and closed.
And the lower arm LA are operated independently.
It may be configured.

(4) In the above embodiment, the fittings R, R ₁
The protrusions having a flange Rf formed around them are used as the protrusions.
Instead of f, a projection may be formed in a fragmentary manner. (5) In the above embodiment, the inner peripheral portion of the V-type chuck 68 is
Although formed in the shape of a letter, the shape may be, for example, a semicircle, a U-shape or the like as long as the shape is along the outer peripheral portion of the rubber molded product 23.

(6) The angle of the taper of the tapered surface 69 of the V-shaped chuck 68 may be appropriately set according to the size, thickness, etc. of the metal fitting of the rubber molded product. (7) The rubber molded product G may be a dust cover for protecting boots, universal joints, cylinders, and the like having different shapes from those of the above-described embodiment.

[0070]

As described above in detail, according to the automatic molding machine for rubber molded articles with metal fittings of the present invention, a ring-shaped metal fitting having a projection on its outer periphery is attached to the outer periphery of one end of the molded article main body. When molding cylindrical rubber molded products,
It is possible to automate the transportation and installation of the metal fittings to a predetermined position, thereby improving the workability and productivity, and to easily release the rubber molded article with metal fittings after molding. It has an excellent effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a main part of an automatic molding machine according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a magazine and a bracket carrying device in one embodiment.

FIG. 3 is a longitudinal sectional view showing a magazine in one embodiment.

FIG. 4 is a sectional view taken along line XX of FIG. 3 in one embodiment.

FIG. 5 is a perspective view showing a bracket supporting and opening means in one embodiment.

FIG. 6 is a perspective view showing a bracket supporting / opening means in one embodiment, showing a state different from FIG. 5;

FIG. 7 is a plan view showing a bracket carrying device in one embodiment.

FIG. 8 is a cross-sectional view showing a guide rail and the like in the bracket transporting device in one embodiment.

FIG. 9 is a cross-sectional view showing a rubber molded product according to one embodiment.

FIG. 10 is a partially cutaway front view showing a molded product take-out apparatus in one embodiment.

FIG. 11 is a cross-sectional view of a main part showing a state before the rubber molded product in one embodiment is mounted on the molded product take-out apparatus.

FIG. 12 is a bottom view showing a molded product taking out apparatus according to one embodiment.

FIG. 13 is a cross-sectional view of a main part showing a state in which a rubber molded product according to one embodiment is mounted on a molded product removal device.

FIG. 14 is a longitudinal sectional view for explaining the operation of the magazine in one embodiment.

FIG. 15 is a sectional view taken along line YY of FIG. 14 in one embodiment.

FIG. 16 is a schematic side view showing the operation of the metal fitting support opening means in one embodiment.

FIG. 17 is a schematic side view showing the operation of the metal fitting support opening means in one embodiment.

FIG. 18 is a view for explaining the operation of the molded product take-out apparatus in one embodiment, and is a cross-sectional view of a main part showing a state in which air is blown from a gas blowing hole.

FIG. 19 is a view for explaining the operation of the molded product take-out apparatus in one embodiment, and is a cross-sectional view of a main part showing a state in which a rubber molded product is separated from a core.

FIG. 20 is a perspective view showing a main part of a bracket supporting and opening means according to another embodiment of the present invention.

[Explanation of symbols]

14 ... outer cylinder, 15 ... support hole, 16 ... inner shaft, 17 ... large diameter part, 18 ... small diameter part, 21 ... ball as metal fitting locking member, 26 ... metal fitting support opening means, 27 ... metal fitting setting means,
28: chuck cylinder as operating means, 41: fitting removal portion as a predetermined portion, 46: core, 50: molded product body, 50a: upper cylindrical portion as one end portion, 58: body portion, 62a: sealing surface , 63: gas blowing hole, 68: V-shaped chuck as a support, 69: tapered surface, 71: cylindrical body, G: rubber molded product, R, R ₁ : metal fitting, Rf: flange, A: metal fitting magazine device (Magazine), B: metal fitting transporter, C: molding equipment, D: metal fitting transporter, E: molded product removal equipment, LA: lower arm, UA: upper arm.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B29C 45/43 B29C 45/43 // B29K 21:00 105: 24 (56) References JP-A-6-210637 (JP, A JP-A-63-125318 (JP, A) JP-A-3-278920 (JP, A) JP-A-4-320821 (JP, A) JP-A-6-20026 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) B29C 45/00-45/17

Claims (1)

(57) [Claims] 1. One end (50a) of a molded article main body (50)
Is a molding machine for automatically molding a cylindrical rubber molded product (G) in which a ring-shaped fitting (R, R ₁ ) having a projection (Rf) on its own outer periphery is attached. An automatic molding machine for a rubber molded product with a fitting, comprising at least the following devices (A) to (E). (A) having a support hole (15) in at least one place, the bracket (R, R ₁₎ the outer cylinder is fitted in a state of being plural loading and (14), the outer cylinder (14) An inner shaft (16) having a large-diameter portion (17) which is arranged to be vertically movable on the inner side and substantially inscribes the outer cylinder (14), and a small-diameter portion (18) having an outer diameter somewhat smaller than that. ), And disposed in the support hole (15), and when the support hole (15) and the small diameter portion (18) face each other, the outer cylinder (1) is disposed.
4) is accommodated inward of the outer peripheral surface of the support hole (1).
5) a metal engaging member (21) movably housed so as to protrude outward from the outer peripheral surface of the outer cylinder (14) when the large diameter portion (17) is opposed to the large diameter portion (17). Hardware magazine device. (B) By approaching and moving away from each other,
An upper arm (U) that supports or releases the metal fittings (R, R ₁ ) that fall from the metal fittings magazine device (A)
Provided with a A) and a lower arm (LA), said arms (UA, with the actuating means for actuating such contradictory operate LA) (28), said bracket (R, so as to fall one by one R ₁₎ And the dropped metal fittings (R, R ₁ ) at a predetermined location (4).
And a metal fitting setting means (27) for carrying and setting to 1). (C) A molding device provided with a core (46) for molding a molded product body (50) of the rubber molded product (G). (D) The predetermined position (4
1) A metal fitting transfer device for transferring the one metal fitting (R, R ₁ ) conveyed to ₁ ) to a predetermined position in the molding device (C). (E) movable in the axial direction of the molded article main body (50);
And a body part (58) having a sealing surface (62a) with which the one end part (50a) of the molded article body (50) abuts.
Attached to the main body (58), and the molded product main body (5
0) so as to be movable in the circumferential direction, and the fittings (R, R
₁ ) and a support (68) for supporting the molded product body (5) attached to the support (68).
0) is provided with a tubular body (71) for restricting the expansion when it is expanded by gas pressure. The main body (58) is provided between the molded product main body (50) and the core (46). A gas blowing hole (63) for releasing the rubber molded product (G) from the core (46) by blowing gas into the support (6) and opening the support (6).
8) When at least the surface on the side of the metal fittings (R, R ₁ ) of the inner peripheral portion is a tapered surface (69) narrowed toward the inner peripheral side, and the support (68) is moved in the inner peripheral direction. A molded product take-out device, wherein one end (50a) of the molded product main body (50) is pressed against a sealing surface (62a) of the main body (58).