JPH11230350A - Device for forming and parting o-ring made of liquid rubber material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and securely draw an O-ring from a mold after forming an O-ring of the liquid rubber material with vulcanization by providing a mold releasing robot 30 provided with elastic rollers for rolling on opposite surfaces of an opening and closing mold to be elevated along a space between a pair of opening and closing molds. SOLUTION: A movable mold 10 and a fixed mold 20 are provided as a pair of opening and closing molds of an O-ring mold to be filled with the liquid rubber material. An O-ring forming mold of each mold 10, 20 is formed so that a formed O-ring is adhered to any one of the opening and closing molds when the molds are opened after closing the molds and farming the O-ring. In this case, a mold parting robot 30 for moving forward and backward between the opening and closing molds at the time of opening the molds is provided, and the mold releasing robot 30 is provided with elastic rollers 36 to be rolled on opposite surfaces of the opening and closing molds. After forming the O-ring, the mold parting robot 30 is elevated along the opposite surfaces of the molds so as to release the formed O-ring from the molds for falling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for vulcanizing an O-ring using a liquid rubber material and releasing the same.

[0002]

2. Description of the Related Art As a molding mode of an O-ring, a rubber material in the form of pellets is used, and a type in which burrs are cut and removed after vulcanization molding is used as a mold configuration for positively generating burrs, and a liquid rubber material is used. There is known a type in which a burr does not occur basically. In the former, the rubber product can be released together with the burrs, so that the release operation is relatively easy, but in the latter, burrs are used to minimize the generation of burrs in the molded O-ring. It is difficult to release. Especially the O-ring
Since the cross-section is circular and the pair of open / closed O-ring molded portions has a semicircular cross-section, the formed O-ring cannot be attached to a specific one of the pair of open / close dies. That is, it is impossible to predict which of the pair of molds the molded O-ring will adhere to. Further, when a plurality of O-rings are formed at the same time, it is more difficult to remove the mold because the individual O-rings are independent.

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an apparatus capable of reliably removing a mold from an apparatus for vulcanizing and molding an O-ring using a liquid rubber material.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided an O-ring forming and releasing apparatus made of a liquid rubber material, which is openable and closable. Opening / closing mold: This pair of opening / closing O-ring molds is made of liquid rubber material with the pair of opening / closing molds closed.
When the pair of opening / closing dies are opened after forming the ring, it is unclear which of the pair of opening / closing dies the formed O-ring adheres to; , A release robot that advances and retreats between the pair of opening and closing dies; and a roller that is provided in the release robot and that is made of an elastic material that rotates in contact with the pair of opening and closing dies, respectively. And

According to this apparatus, the release robot is moved between a pair of openable dies opened after molding is completed, and the roller is moved up and down while contacting the roller with the opposing surface of the openable dies.
Due to the friction between the roller and the molded O-ring, the molded O-ring is released from the mold and falls. The dropped O-ring may be collected as appropriate.

More specifically, the pair of opening / closing dies each include a plurality of O-ring shaped portions, and a central runner portion at the center of the plurality of O-ring shaped portions and communicating with the respective O-ring shaped portions and the gate. And an air vent portion communicating with each O-ring shaped portion.
The center runner beam, the O-ring and the air vent beam are integrally vulcanized and formed by the liquid rubber material supplied through the center runner portion when the pair of opening and closing dies are closed. In the case of the opening / closing type, it is preferable that the release robot is provided with a central deburring hand for gripping the central runner beam.

[0007] Below the pair of opening and closing dies, a conveyor for collecting the formed O-ring and the air vent beam is provided.
Downstream of this conveyor, it is preferable to further provide a vibrator for separating the O-ring from the air vent beam.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 4 and 8, a pair of opening / closing dies 10 and 20 are separated from each other by contacting / separating opposing surfaces 11 and 21. The movable type which is reciprocated by the plunger 12a, and the fixed type which does not move the open / close type 20.

As shown in FIGS. 8 and 9, the movable mold 10 and the fixed mold 20 respectively have an O-ring forming mold (O-ring forming section) which faces the contact / separation facing surfaces 11 and 21 and forms a pair. A plurality (13 in the illustrated example) of 13 and 23 are formed concentrically. Movable dies 10 and 20 (contact and separation surfaces 11 and 2)
1) includes O-ring molds 13 and 2 arranged concentrically.
3 and the sprue 22 and each O
Central runner portions 14 and 24 are formed to communicate with the ring molds 13 and 23, respectively.
And O, the O-ring molds 13 and 2
Air vents 15 and 25 leading to 3 are formed. The molding spaces of the O-ring molds 13 and 23 are respectively
The O-ring molds 13 and 2 have a semicircular cross section.
3 shows the center runners 14 and 24 and the air vents 15 and 25 when the movable dies 10 and 20 are closed.
Through a minute liquid rubber material supply space. That is, the sprue 22 and the center runner portion 14 (2
After the liquid rubber material supplied through 4) reaches the O-ring mold 13 (23), the air vent portion 1
5 (25), a central runner beam C, a molded O-ring O, and a peripheral air vent beam A are formed.

When the movable mold 10 and the fixed mold fixed mold 20 are opened, the center runner beam C formed by the gate 22 and the center runner section 14 (24) is always provided in the center runner section 14 of the movable mold 10. An undercut is made to remain on the 10 side. On the other hand, the O-ring molds 13 and 23 and the air vent portions 15 and 25 are not provided with such an undercut, and the movable molds 10 and 20 are not provided.
It is undefined to which of the molding O-ring O and the air vent burr A adheres when the is opened.

The release robot 30 moves up and down between the movable mold 10 and the fixed mold 20 in a state where the movable mold 10 and the fixed mold 20 are opened, and a predetermined direction (a direction perpendicular to the plane of FIG. 1) at the ascending position.
Transfer to is possible. Above the movable mold 10 and the fixed mold 20, there is provided a movable table 32 that can move in a direction perpendicular to the paper surface along a guide rail 31 as shown in FIG. 1. A horizontal cylinder device 33 and an advancing / retreating table 34 that moves in a horizontal direction are supported by the horizontal cylinder device 33. A vertical cylinder device 35 is supported on the advance / retreat table 34, and the release robot 30
The vertical cylinder device 35 moves up and down.

The release robot 30 includes a pair of upper and lower rollers 36 respectively corresponding to the contact / separation facing surface 11 of the movable mold 10 and the contact / separation facing surface 21 of the fixed mold 20. Each of the four rollers 36 is made of an elastic material such as rubber or synthetic resin, and is rotatably supported around a shaft 36a. When the release robot 30 moves up and down, it rotates with the frictional force. There is no power source to rotate.

The release robot 30 is provided with a deburring hand 38. This center burr removal hand 38
Is for holding the center runner beam C formed by the gate 22 and the center runner portions 14 and 24 of the movable mold 10 and the fixed mold 20 and held on the movable mold 10 side by undercut, as shown in FIG. The pair of gripping arms 38a are opened and closed by an actuator 38b. The deburring hand 38 can be configured to always bias the pair of gripping arms 38a in a closing direction by a spring force, and to open the gripping arms 38a against the biasing force by an actuator 38b. .

Below the movable mold 10 and the fixed mold 20, a collection conveyor 40 and a separation vibrator 50 are provided. The collection conveyor 40 is composed of a combination of a conveyor in a direction perpendicular to the plane of FIG. 1 to FIG. 4 and a conveyor in the left and right direction. In FIG. 1 to FIG. 4 and FIG. After forming the O-ring, the movable mold 10 and the fixed mold 20 are opened, and the molded O-ring O and the center runner beam C are released from the mold and dropped. 6 to the collection conveyor 40 of FIG. The separation vibrator 50 has a separation chute 52 that vibrates with the vibrator 51, and a large number of separation holes 53 having a size that allows the air vent burr A to fall but does not allow the formed O-ring O to drop. A collection box 54 for air vent beam A is provided, and a separation chute 52 is provided.
Is provided with a collection box 55 for the molded O-ring O at the end point of the.

As shown in FIGS. 1 and 5, a collecting chute of the center runner beam C is provided above the movable mold 10, and the collecting chute 60 is provided with the central runner beam C.
Wants in the collection box 61 of.

The apparatus having the above configuration operates as follows. When vulcanization molding is performed with the movable mold 10 and the fixed mold 20 closed, the release robot 30 is raised. Movable mold 10
And the fixed mold 20 are closed, a predetermined amount of liquid rubber material is supplied from the gate 22 and vulcanization molding is performed under predetermined conditions.
A central runner beam C connected to each other is formed in a mold space formed by the central runner portions 14 and 24, and a molded O-ring O is formed in a mold space formed by the molded O-ring molds 13 and 23. In the mold space formed by the air vent portions 15 and 25, the air vent burr A
Is molded.

After the vulcanization molding is completed, when the movable mold 10 and the fixed mold 20 are opened, the center runner beam C remains on the movable mold 10 due to the undercut formed in the center runner portion 14. However, molding O-ring O and air vent burr A
It is unknown which of the movable mold 10 and the fixed mold 20 is attached. In this state, the release robot 30 is lowered between the movable mold 10 and the fixed mold 20. The opening amounts of the movable mold 10 and the fixed mold 20 are determined so that the upper, lower, left and right rollers 36 of the release robot 30 come into contact with the contact / separation facing surfaces 11 and 21 while being slightly deformed. Is in frictional contact with the molded O-ring O and the air vent burr A which are molded and adhere to one of the contact / separation facing surfaces 11 and 21. Molded O-ring O and air vent beam A
It is released by frictional contact with the roller 36 and falls onto the collection conveyor 40.

Center flash removing hand 3 of release robot 30
When 8 reaches the center runner beam C, the actuator 3
8b closes the gripping arm 38a to grip the center runner beam C. The lowering of the mold release robot 30 is continued until the roller 36 comes into frictional contact with all the formed O-rings O and the air vent beam A on the contact / separation facing surface 11 or 21, and the formed O-ring O with which the forming is completed All the air vent beams A fall onto the collection conveyor 40 and reach the separation vibrator 50.

When the molding O-ring O and the air vent beam A, and the center runner beam C and the molding O-ring O are finished, the molding O-ring mold 13 (23), the air vent portion 14 (24), and the center are formed. The runner portion 14 (24) and the molded O-ring molding die 13 (23) are connected by a resin that is present in a slight gap in the liquid rubber material flow that communicates with each other. O and the air vent beam A, and the central runner beam C and the molded O-ring O are simultaneously separated. In other words, the molded O-ring mold 13 (23) and the air vent 15 (25), and the center runner 14 (24) and the molded O-ring mold 1
3 (23), the size of the rubber material flow gap and the size of the contact pressure between the roller 36 and the contact / separation facing surface 11 (21) are determined by the frictional contact of the roller 36 with the molded O-ring O and the air vent. The beam A and the central runner beam C are formed so as to be separated from the formed O-ring O.

The formed O-ring O and the air vent beam A reaching the separation vibrator 50 slide down on the separation chute 52 vibrated by the vibrator 51, and fall in this process. Be sure to drop from one of the separation holes 53 to the collection box 54. On the other hand, the molded O-ring O reaches the end point of the separation chute 52 without falling, and is collected in the collection box 55.

The release robot 30 moves up after reaching the lower end. The center burr removing hand 38 holding the center runner burr C has the collecting chute 6 as the center burr removing hand 38.
When reaching the upper part of zero, the central runner beam C is opened, dropped on the collecting chute 60 and collected in the collecting box 61. Hereinafter, each time vulcanization molding by the movable mold 10 and the fixed mold 20 is completed, the above operation is repeated.

[0022]

According to the apparatus of the present invention, after a molded O-ring is vulcanized using a liquid rubber material, it is possible to surely release the molded O-ring from which of the open / close dies is unknown. Can be.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an apparatus for releasing a molded O-ring according to the present invention.

FIG. 2 is a front view showing a releasing step of the apparatus of FIG.

FIG. 3 is a front view showing a release step of the apparatus of FIG. 1 in a state different from FIG. 2;

FIG. 4 is a front view showing a release step of the apparatus of FIG. 1 in a state different from FIGS. 2 and 3;

FIG. 5 is a front view showing a line for removing a central beam by a peeling hand of a release robot.

FIG. 6 is a perspective view showing a mechanism for separating and removing a molded O-ring and an air vent beam.

FIG. 7 is an enlarged perspective view of the release robot.

FIG. 8 is a front view of a pair of opening and closing dies.

FIG. 9 is a view taken in the direction of the arrow IX in FIG. 8;

[Explanation of symbols]

 Reference Signs List 10 movable type (open / close type) 20 fixed type (open / close type) 11 21 contact / separation facing surface 13 23 O-ring forming die 14 24 center runner part 15 25 air vent part 22 gate 30 release robot 33 horizontal cylinder device 35 vertical cylinder device 36 Roller 36a Shaft 38 Center beam removal hand 40 Collection conveyor 50 Separation vibrator 54 55 61 Collection box O Molded O-ring A Air vent beam C Center runner beam

Claims (4)

[Claims] 1. A pair of open / close molds each having an O-ring mold that is openable and closable and has an O-ring to which a liquid rubber material is supplied on mutually facing / separating opposing surfaces; With the open / close mold closed, O
When the pair of opening and closing dies are opened after forming the ring, it is unclear which of the pair of opening and closing dies the formed O-ring adheres to; the pair of opening and closing dies open. A release robot that advances and retreats between the pair of opening and closing dies in a state; and a roller that is provided in the release robot and that is made of an elastic material that rotates in contact with the pair of opening and closing dies. An O-ring molding / release apparatus made of a liquid rubber material. 2. The molding and releasing apparatus according to claim 1, wherein
The pair of opening / closing dies each include a plurality of O-ring-shaped portions, a central runner portion at the center of the plurality of O-ring-shaped portions and communicating with each O-ring-shaped portion and the gate, and an air communicating with each O-ring-shaped portion. A central runner beam having a vent portion, and a liquid rubber material supplied through the central runner portion in a state where the pair of open / close molds is closed;
The O-ring and the air vent beam are integrally vulcanized and formed, and the release robot is an O-ring forming and releasing apparatus including a center deburring hand for gripping the center runner beam. 3. The mold release apparatus according to claim 1, wherein the O-ring is provided with a conveyer for collecting a molded O-ring and an air vent under the pair of opening / closing dies. Mold device. 4. The mold release device according to claim 3, wherein
Downstream of the conveyor, an O-ring forming and releasing apparatus provided with a vibrator for separating the formed O-ring and the air vent beam.