JP4023890B2 - Mold release device for O-ring with liquid rubber material - Google Patents

Description

[0001]
【Technical field】
The present invention relates to an apparatus for vulcanizing and releasing an O-ring using a liquid rubber material.
[0002]
[Prior art and its problems]
As the O-ring molding mode, pellet-shaped rubber material is used, and as a mold configuration that actively generates burrs, burrs are cut and removed after vulcanization molding, and liquid rubber material is used, and basically no burrs are generated. A type having a mold configuration is known. The former can release the rubber product together with the burr, so the release operation is relatively easy, but the latter uses a burr to prevent as much burr as possible in the molded O-ring. It is difficult to release. In particular, the O-ring has a circular cross section, and the pair of open / close type O-ring forming portions have a semicircular cross section, and thus the formed O-ring cannot be attached to a specific one of the pair of open / close molds. That is, it cannot be predicted which molding O-ring will adhere to which of the pair of molding dies. Furthermore, when molding a plurality of O-rings at the same time, it is more difficult to take out the mold because each O-ring is independent.
[0003]
OBJECT OF THE INVENTION
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus that can reliably remove a mold from an apparatus for vulcanizing and molding an O-ring using a liquid rubber material.
[0004]
SUMMARY OF THE INVENTION
The O-ring molding release device according to the present invention can be opened and closed in the horizontal direction, and the O-ring molding in which the liquid rubber material is supplied to the contact and separation opposing surfaces that are substantially orthogonal to the horizontal direction. A pair of open / close molds each having a mold; the pair of open / close molds is formed by forming an O-ring with a liquid rubber material with the pair of open / close molds closed, and then opening the pair of open / close molds. It is unclear which of the pair of open / close molds the molded O-ring is attached to; when the pair of open / close molds is open, it moves forward and backward between the pair of open / close molds. And a roller made of an elastic material provided in the release robot and rotating in contact with the opposing surfaces of the pair of opening and closing dies.
[0005]
According to this apparatus, when the mold release robot enters between a pair of open / close molds that have been opened after molding, and the roller is moved up and down while contacting the opposing surface of the open / close mold, the friction between the rollers and the molding O-ring As a result, the molded O-ring is released from the mold and dropped. The dropped O-ring may be collected as appropriate.
[0006]
More specifically, each of the pair of open / close molds includes a plurality of O-ring shape portions, a central runner portion that is in the center of the plurality of O-ring shape portions and communicates with each O-ring shape portion and the gate, and It is preferable to provide an air vent portion that communicates with the O-ring-shaped portion. In this mold configuration, the central runner flash, O liquid is supplied by the liquid rubber material supplied through the central runner portion in a state where the pair of open / close molds are closed. A ring and an air vent beam are integrally vulcanized. In the case of this open / close type, it is preferable that the release robot is provided with a central burr removal hand that holds the central runner beam.
[0007]
It is preferable that a vibrator having a separation hole in which a molded O-ring cannot be dropped and only an air vent beam can be dropped is provided downstream of the conveyor.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The pair of open / close molds 10 and 20 are contacted / separated by contact / separation facing surfaces 11 and 21 as is apparent from FIGS. 1 to 4 and 8, and the open / close mold 10 is reciprocated by the plunger 12 a of the cylinder device 12. The movable mold is a fixed mold in which the open / close mold 20 does not move.
[0009]
As shown in FIGS. 8 and 9, the movable mold 10 and the stationary mold 20 are respectively provided with O-ring molds (O-ring mold portions) 13 and 23 which face the contact / separation facing surfaces 11 and 21 and make a pair with each other. Are formed concentrically (in the illustrated example, 12). The movable molds 10 and 20 (contacting / separating facing surfaces 11 and 21) are positioned at the center of concentrically arranged O-ring molds 13 and 23, and a sprue 22 and each O-ring mold 13 , 23 are formed at the center runner portions 14 and 24, respectively, and are located outside the O-ring molds 13 and 23 to form air vent portions 15 and 25 that communicate with the O-ring molds 13 and 23, respectively. Has been. The molding spaces of the O-ring molds 13 and 23 each have a semicircular cross section, and the O-ring molds 13 and 23 have the center runner portions 14 and 24 in a state where the movable molds 10 and 20 are closed. The air vents 15 and 25 communicate with each other through a minute liquid rubber material supply space. That is, the liquid rubber material supplied via the sprue (sprue) 22 and the central runner portion 14 (24) reaches the O-ring mold 13 (23), and further reaches the air vent portion 15 (25). A central runner flash C, a molded O-ring O, and a peripheral air vent flash A are formed.
[0010]
When the movable mold 10 and the fixed mold fixed mold 20 are opened, the central runner beam C formed by the gate 22 and the central runner section 14 (24) is always placed on the movable mold 10 side. An undercut is applied so that it remains. On the other hand, the O-ring molds 13 and 23 and the air vent portions 15 and 25 are not subjected to such an undercut, and when the movable molds 10 and 20 are opened, the molded O-ring O and the air It is uncertain whether the vent flash A will adhere.
[0011]
The release robot 30 can move up and down between the movable mold 10 and the fixed mold 20 in an open state, and can move in a predetermined direction (a direction perpendicular to the paper surface of FIG. 1) at the raised position. It is. A movable table 32 is provided above the movable mold 10 and the fixed mold 20 and is movable along the guide rails 31 in a direction perpendicular to the paper surface, as shown in FIG. A horizontal cylinder device 33 and an advancing / retreating base 34 that moves forward and backward in the horizontal direction are supported by the horizontal cylinder device 33. A vertical cylinder device 35 is supported on the advance / retreat platform 34, and the release robot 30 moves up and down by the vertical cylinder device 35.
[0012]
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 supported so as to be rotatable about a shaft 36a. When the mold release robot 30 moves up and down, it rotates with its frictional force. There is no power source to rotate.
[0013]
The release robot 30 is provided with a center flash removal hand 38. This center flash removal hand 38 is configured to grip the central runner flash C formed by the pouring gate 22 and the central runner portions 14 and 24 of the movable mold 10 and the fixed mold 20 and held on the movable mold 10 side by an undercut. As shown in FIG. 7, the pair of gripping arms 38a are opened and closed by an actuator 38b. For example, the center beam removal hand 38 can be configured such that a pair of gripping arms 38a is constantly biased in a closing direction by a spring force, and the gripping arms 38a are opened against the biasing force by an actuator 38b. .
[0014]
A collection conveyor 40 and a separation vibrator 50 are provided below the movable mold 10 and the fixed mold 20. The collection conveyor 40 is a combination of a conveyor in a direction perpendicular to the paper surface of FIGS. 1 to 4 and a conveyor in the left-right direction. In FIGS. 1 to 4 and 6, only the conveyor in the left-right direction is drawn. After forming the O-ring, when the movable mold 10 and the fixed mold 20 are opened and the molded O-ring O and the central runner beam C are released and dropped, the molded O-ring O and the central runner beam C are finally formed. 6 reaches the collection conveyor 40 of FIG. 6 and further reaches the separation vibrator 50. The separation vibrator 50 is provided with a large number of separation holes 53 sized to drop the air vent beam A but not the molded O-ring O to a separation chute 52 that vibrates with the vibrator 51, and below the separation hole 53. A collection box 54 for the air vent flash A is provided, and a collection box 55 for the molded O-ring O is provided at the end point of the separation chute 52.
[0015]
As shown in FIGS. 1 and 5, a collection chute for the central runner beam C is provided above the movable mold 10, and the collection chute 60 is desired for the collection box 61 of the central runner beam C.
[0016]
The apparatus having the above-described configuration operates as follows. When the movable mold 10 and the fixed mold 20 are closed and vulcanized and molded, the release robot 30 is raised. When the movable mold 10 and the fixed mold 20 are closed, a predetermined amount of liquid rubber material is supplied from the gate 22 and vulcanized and molded under predetermined conditions, the mold space formed by the gate 22 and the central runner portions 14 and 24 is filled. The central runner beam C which is connected to each other is molded, the molded O-ring O is molded in the mold space formed by the molded O-ring molds 13 and 23, and the air is injected into the mold space formed by the air vent portions 15 and 25. A vent flash A is formed.
[0017]
When the movable mold 10 and the fixed mold 20 are opened after the vulcanization molding is completed, the central runner beam C remains on the movable mold 10 side due to the undercut formed in the central runner portion 14. However, it is unclear whether the molded O-ring O and the air vent beam A are attached to the movable mold 10 or the fixed mold 20. In this state, the release robot 30 is lowered between the movable mold 10 and the fixed mold 20. The opening amount of the movable mold 10 and the fixed mold 20 is determined such that the upper, lower, left and right rollers 36 of the release robot 30 are slightly deformed and come into contact with the contact / separation facing surfaces 11 and 21. Is in frictional contact with the molded O-ring O and the air vent beam A which are molded and attached to either of the contact / separation facing surfaces 11 and 21. The formed O-ring O and the air vent beam A are released by frictional contact with the roller 36 and fall on the collection conveyor 40.
[0018]
When the central flash removal hand 38 of the release robot 30 reaches the central runner flash C, the gripping arm 38a is closed by the actuator 38b and the central runner flash C is gripped. The lowering of the release robot 30 is continued until the roller 36 is in frictional contact with all the forming O-rings O and the air vent beams A on the contact / separation facing surface 11 or 21, All the air vent beams A fall on the collection conveyor 40 and reach the separation vibrator 50.
[0019]
The molded O-ring O and the air vent beam A, and the central runner beam C and the molded O-ring O are molded O-ring mold 13 (23), air vent part 14 (24), and central runner part 14 in the finished state. (24) and the molded O-ring mold 13 (23) are connected by a resin that exists in a slight liquid rubber material flow gap that allows the molded O-ring mold 13 (23) to communicate with each other. The vent flash A, the central runner flash C and the molded O-ring O are separated simultaneously. In other words, the size of the flow gap of the rubber material between the molded O-ring mold 13 (23) and the air vent 15 (25), and the central runner 14 (24) and the molded O-ring mold 13 (23), The contact pressure between the roller 36 and the contact / separation facing surface 11 (21) is determined by the frictional contact of the roller 36 with the molded O-ring O and the air vent beam A, and the central runner beam C and the molded O-ring O. To be separated.
[0020]
The formed O-ring O and the air vent beam A that have reached the separation vibrator 50 slide down on the separation chute 52 that is vibrated by the vibrator 51, and in this process, the air vent beam A is always one of them. From the separation hole 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.
[0021]
The release robot 30 moves up after reaching the descending end. The central flash removal hand 38 holding the central runner flash C opens the central runner flash C when the central flash removal hand 38 reaches the upper part of the collection chute 60, drops it onto the collection chute 60, and enters the collection box 61. collect. Hereinafter, every time the vulcanization molding by the movable mold 10 and the fixed mold 20 is completed, the above operation is repeated.
[0022]
【The invention's effect】
According to the apparatus of the present invention, after the molded O-ring is vulcanized using a liquid rubber material, it is possible to reliably release the molded O-ring that is unknown to which of the open / close molds.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a molding release device for a molded O-ring according to the present invention.
FIG. 2 is a front view showing a mold release process of the apparatus of FIG. 1;
FIG. 3 is a front view showing a mold release process of the apparatus of FIG. 1 in a state different from FIG.
4 is a front view showing a mold release process of the apparatus of FIG. 1 in a state different from FIGS. 2 and 3. FIG.
FIG. 5 is a front view showing a central beam removal line by a peeling hand of a release robot.
FIG. 6 is a perspective view showing a separation / extraction mechanism for a molded O-ring and an air vent beam.
FIG. 7 is an enlarged perspective view of a release robot.
FIG. 8 is a front view of a pair of open / close types.
9 is a view taken along arrow IX in FIG.
[Explanation of symbols]
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 portion 15 25 Air vent portion 22 Pouring gate 30 Mold release robot 33 Horizontal cylinder device 35 Vertical cylinder device 36 Roller 36a Shaft 38 Center beam removal hand 40 Collecting conveyor 50 Separation Vibrator 54 55 61 Collection box O Molded O-ring A Air vent beam C Center runner beam

Claims (4)

A pair of open / close dies each having an O-ring mold that is supplied with a liquid rubber material on the contact and separation facing surfaces that are open and close in the horizontal direction and substantially perpendicular to the horizontal direction ;
The pair of opening / closing type O-ring molds is formed by forming an O-ring with a liquid rubber material in a state in which the pair of opening / closing molds is closed, and then opening the pair of opening / closing molds to form a pair of O-rings. The shape of the open / close type is unknown.
A release robot that moves up and down between the pair of open / close molds when the pair of open / close molds is open;
And a roller made of an elastic material provided in the release robot and rotating in contact with the opposing surfaces of the pair of open / close molds;
An apparatus for molding and releasing an O-ring made of a liquid rubber material. 2. The molding release apparatus according to claim 1, wherein each of the pair of opening and closing dies has a plurality of O-ring shape portions and a central runner that is in the center of the plurality of O-ring shape portions and communicates with each O-ring shape portion and the gate And an air vent portion communicating with each O-ring shape portion, and a central runner flash, an O-ring by a liquid rubber material supplied through the central runner portion in a state where a pair of open / close molds are closed And the air vent beam is integrally vulcanized and molded,
The mold release robot is an O-ring mold release apparatus provided with a central burr removal hand for gripping the central runner beam. 3. The molding release apparatus according to claim 1, wherein a conveyor for collecting the molded O-ring and the air vent beam is provided below the pair of open / close molds. 4. The molding release apparatus according to claim 3 , wherein a vibrator having a separation hole in which a molded O-ring cannot fall and only an air vent beam can fall is provided downstream of the conveyor. .

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