JP2004160702A - Apparatus and method for releasing elastic wheel from mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for releasing an elastic wheel from a mold which can improve productivity when the elastic wheel formed by laminating a wheel-like element made of an elastic material on the outer peripheral surface of an inner wheel for a base having only an axial hole so that the elastic wheels having different axial hole diameters and elastic wheels having a plurality of dispersing engaging holes for mold releasing on the circumference of the outer peripheral position of the axial hole of the inner wheel for the base and having different diameter of the circumference are mixed and manufactured in a continuously manufacturing line of the elastic wheels, and to provide a method for releasing the elastic wheel from the mold using the same. <P>SOLUTION: The apparatus 4 for releasing the elastic wheel from the mold includes a fixing unit 40 for fixing the mold 1 for molding, and drawing units 4A, 4B for releasing the elastic wheel from the mold by moving the elastic wheel (q) from the mold 1 in an axial core direction. The units 4A, 4B have a plurality of engaging pawls 6 each for engaging with the engaging part of the inner wheel for the base, axial core direction advancing and retracting means 7A, 7a for moving the engaging pawls in the axial core direction, and radial advancing and retracting means 6D, 6e for radially advancing and retracting the pawls in the radial direction of the inner wheel for the base in response to the position of the engaging part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides an outer peripheral surface of an inner ring for a base by casting an elastic material composition into a cavity formed between the outer peripheral surface of the inner ring for a substrate disposed in a cylindrical mold having a bottom and the mold. The present invention relates to a demolding apparatus for demolding an elastic ring from a molding die in a continuous production line for an elastic ring in which an elastic ring-shaped body is laminated and formed on a surface, and a method for demolding an elastic ring using the demolding apparatus. It is.
[0002]
[Prior art]
As shown in FIG. 13, in a continuous production line for a roll-shaped elastic ring q in which an elastic ring-shaped body 23 is laminated on the outer peripheral surface of a base inner ring 2 formed of a highly rigid material such as a metal, Conventionally, as shown in FIG. 14, a metal inner ring (base inner ring) 22 is disposed in a bottomed cylindrical forming die (die) 21, and an outer peripheral surface of the base inner ring 2 and an inner peripheral surface of the forming die are formed. An elastic body forming material composition such as a polyurethane elastomer is injected into the molding cavity formed between them, heated and cured to laminate and form the elastic ring-shaped body 23 to produce an elastic ring q. Thus, the elastic ring q was obtained.
[0003]
As the inner ring 2 for the base in such an elastic ring, a type having only a shaft hole as shown in FIGS. 4 to 14 and a type having a plurality of demolds on the outer circumference of the shaft hole as shown in FIG. There are two types of dispersing engagement hole type having the above engagement holes, and cannot be released by the same release device. Therefore, they are manufactured separately, for example, a base inner ring having only a shaft hole (axial hole type base inner ring). In the removal of the elastic ring q using the elastic ring q, as shown in FIG. 14, the metal mold 1 is fixed, and the metal base inner ring 2 is manually engaged with the engaging claw 24 of the elastic ring drawing device. In this case, the diameter is reduced by pressing down, the diameter is increased, and the diameter is engaged with the shaft hole 5 of the inner ring 2 for the base.
[0004]
Also, in the demolding of the elastic ring of the distributed engagement hole type, a pulling device different from the elastic ring of the shaft hole type is required, and in the demolding, a step change of the demolding device is required. Had to be manufactured on a separate production line.
[0005]
[Problems to be solved by the invention]
However, even if the type of the base inner ring 2 is different, the steps of injecting the elastic body-forming material composition, heating and curing are the same, and in order to simplify the manufacturing process and reduce the cost, the same is required. It is preferable to manufacture elastic rings of different types of the base inner ring 2 on a production line, but the conventional demolding method could not meet such a demand. Further, in the inner ring for a shaft hole type base body having only a shaft hole, the inner ring having a different inner diameter of the shaft hole, and a distributed engagement hole type base body having a plurality of engagement holes for releasing on the outer circumference of the shaft hole. As for the inner ring, it is required to manufacture elastic rings having different diameters of the circumference where the dispersing engagement holes are arranged. I couldn't make it higher.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a continuous production line for an elastic ring in which an elastic ring-shaped body is laminated on the outer peripheral surface of an inner ring for a base. And the base inner ring has a plurality of demolding dispersing engagement holes on the circumference at the outer peripheral position of the shaft hole, and the diameter of the circumference is different. An object of the present invention is to provide a device for removing an elastic wheel and a method for removing an elastic wheel using the same, which can improve productivity when mixed with different elastic wheels.
[0007]
[Means for Solving the Problems]
The device for removing a resilient ring according to the present invention comprises: casting an elastic material into an outer cavity of an inner ring for a base having a shaft hole disposed in a cylindrical mold having a bottom; A demolding apparatus for demolding the elastic ring from the molding die, which is disposed in a continuous production line for producing an elastic ring in which elastic material ring-shaped bodies are laminated.
A fixing device for fixing the molding die, and a drawing device for moving the elastic ring in the axial direction from the molding die and removing the molding die,
The pulling device includes a plurality of engaging claws that engage with an engaging portion of the base inner ring, an axial direction moving unit that moves the engaging claw in an axial direction, and the engaging claw that includes the engaging portion. Radially moving means for moving the base inner ring in the radial direction in accordance with the position of the base ring.
[0008]
By using such a drawing device, even if an elastic ring having a different inner diameter of a shaft hole serving as an engaging portion or an elastic ring using a base inner ring of a distributed engaging hole type is mixed and manufactured, it can be easily engaged. In this case, the mold can be removed, and the production line has excellent productivity.
[0009]
In the pulling device that constitutes the demolding device according to the present invention, the engaging portion is an end surface of a shaft hole of the base inner ring, and the pulling device is configured such that the engaging claw is retreated in a radial direction and the shaft is rotated. It is preferable that the shaft hole pulling device is configured so as to advance after the hole is inserted, to expand the diameter and to engage with the end surface of the shaft hole of the inner ring for the base.
[0010]
Such a pulling device can easily engage and disengage when the engaging portion engaged by the engaging claw is a shaft hole, and the shaft hole having a different inner diameter is manufactured by mixing. is there.
[0011]
Further, in the pulling-out device constituting the demolding device of the present invention, the engaging portion is a plurality of distributed engaging holes distributed in the circumferential direction at an outer peripheral position of a shaft hole of the base inner ring, The disengagement engagement is such that the engagement claw is adjusted to be located at the engagement hole position by the engagement claw advance / retreat means, and then moves in the axial direction to be inserted into and engaged with the engagement hole. Preferably, it is a hole drawing device.
[0012]
According to the above configuration, in the case of manufacturing with elastic rings using the inner ring for the base of the distributed engagement hole type, in the case where the elastic rings having different diameters of the circumference where the distributed engagement holes are formed are mixed and manufactured. In addition, there is no need to change the step of the demolding device and the like, and it is possible to easily engage and demold the die without the need for a manual operation for positioning, thereby improving the productivity.
[0013]
In particular, it is preferable that the pulling device constituting the demolding device is configured so that a pulling device for a shaft hole and a pulling device for a dispersion hole can be selected.
[0014]
With such a configuration, when the elastic ring using the base inner ring having the different inner diameter of the shaft hole and the elastic ring having the different diameter of the circumference in which the dispersed engagement hole is formed are mixed and manufactured, the step change of the demolding device is performed. It is possible to easily engage and disengage without any necessity, and also no manual work of positioning is required, and it is possible to improve productivity.
[0015]
The fixing device that constitutes the demolding device of the present invention is provided with a projection having a cylindrical outer peripheral surface of the molding die, which is provided on an abutting surface so as to fit into an annular groove formed in a circumferential direction of the molding die. It is preferable that the pair of stopper members are disposed so as to be able to move back and forth in the radial direction of the molding die.
[0016]
Such a fixing device can hold and fix the molds flowing one after another in the production line such that the axis of the formed elastic ring coincides with the axis of the engaging claw of the drawing device. In addition, it is possible to surely prevent the mold from being lifted when the mold is pulled out.
[0017]
According to the present invention, an elastic material is cast into an outer cavity of an inner ring for a base having a shaft hole disposed in a cylindrical mold having a bottom, and an elastic ring-shaped body is laminated on an outer peripheral surface of the inner ring for the base. A demolding method of demolding the elastic ring from the molding die using a demolding device provided in a continuous production line for producing the elastic ring,
The demolding device includes a fixing device that fixes the molding die, and a drawing device that removes the elastic ring by moving the elastic ring in the axial direction from the molding die,
The pulling device includes a plurality of engaging claws that engage with an engaging portion of the base inner ring, an axial direction moving unit that moves the engaging claw in an axial direction, and the engaging claw that includes the engaging portion. Radially retreating means for reciprocating in the radial direction of the base inner ring in accordance with the position of the base inner ring, fixing the molding die with a fixing device, and setting the engaging claw of the drawing device to the base inner ring of the base inner ring. The elastic ring is disengaged from the mold by engaging the engaging portion and moving the engaging claw in the axial direction.
[0018]
In the demolding method according to the present invention, the demolding device includes the shaft hole pulling device according to claim 2 and the dispersion engaging hole pulling device according to claim 3, and is continuously manufactured. It is preferable to select and use a drawing device according to the base inner ring of the elastic ring having different base inner rings manufactured in the line.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
A device and a method for removing an elastic wheel according to the present invention will be described using preferred embodiments.
FIG. 1 is a schematic diagram showing the entire configuration of a continuous production line for elastic wheels on which a demolding apparatus according to one embodiment of the present invention is provided and a demolding method according to one embodiment of the present invention is performed.
In the continuous production line of FIG. 1, the base inner ring 2 is set in the forming die 1 at the preparation stage ST1, and then the forming die 1 and the base inner ring 2 are set by a heating mechanism (not shown) arranged on the preliminary heating stage ST2. Is preheated to a predetermined temperature, and then a predetermined amount of the elastic material forming material composition M is supplied into a molding cavity formed between the molding die 1 and the base inner ring 2 at the liquid injection stage ST3. Subsequently, the elastic material forming material composition M is heated and reacted and hardened by a heating mechanism (not shown) arranged on the main heating stage ST4, thereby forming the elastic material annular body 3 on the outer peripheral surface of the base inner ring 2. . After the molding, the elastic ring q is released from the mold using a release device arranged on the release stage ST5. Such a process is repeatedly executed in the production line. At this time, various things are used as the base inner ring 2.
[0020]
The elastic material is not particularly limited, but a two-component reaction-curable polyurethane elastomer is generally used.
[0021]
In the continuous production line according to the present embodiment, a cylindrical mold 1 having a bottom as shown in FIG. 2 is used. Preferably, a mold having the same outer surface shape and different in inner diameter, depth and the like according to the elastic ring to be manufactured is mixed. In the mold 1, an annular groove 1a is formed on the outer peripheral surface in the circumferential direction.
[0022]
FIG. 3 shows an example of the fixing device 40 constituting the demolding device. The fixing device 40 includes a pair of stopper members 4b that abut and hold and fix the mold 1, and each of the stopper members 4b is an air cylinder or an air cylinder disposed so as to form an angle of about 90 degrees. It is connected to the hydraulic cylinder 4c and is configured to be able to move out and back. On the surface of the stopper member 4b abutting on the mold 1, a protrusion 4d is formed to fit into the groove 1a of the mold 1. The protrusion 4d prevents the molding die 1 from sliding and moving in the axial direction (pulling direction) when the elastic ring q is pulled out from the molding die 1.
[0023]
The end face 41 of the stopper member 4b is positioned between the end face 41 of the stopper member 4b and the mold 1 such that when the mold 1 is sandwiched, the line L formed by the end face is located outside the center O of the cavity of the mold. It is preferable to set the contact width large. If the line L is too close to the center O of the cavity of the mold 1 due to the small contact width of the stopper member 4b with the mold 1, the mold 1 may slip off.
[0024]
By using the same outer shape (outer diameter, size and position of the groove 1a, etc.) of the mold 1, the center O of the cavity of the mold is always set at the same position when the same fixing device is used. Can be made to coincide with the axis of the engaging claw of the pulling-out device 4 (4A, 4B).
[0025]
FIG. 4 shows an example of a shaft-hole-type base inner ring 2A having only a shaft hole 5, and FIG. 5 shows a plurality of shaft-hole-type base inner rings 2A distributed at equal intervals of 90 ° in the circumferential direction. Examples of the base engagement inner ring 2B of the dispersion engagement hole type having the dispersion engagement holes 51 are shown in a top view and a sectional view, respectively.
[0026]
FIG. 6 shows an example of forming an elastic ring q using the shaft hole type base inner ring 2A shown in FIG. 4, and an elastic ring using the distributed engagement hole type base inner ring 2B shown in FIG. FIG. 7 shows examples of forming q.
[0027]
It is preferable that the inner rings 2A and 2B for the base are previously subjected to a primer treatment or the like for increasing the adhesive strength with the elastic material.
[0028]
FIG. 8 shows an example of the shaft hole pulling-out device 44A constituting the demolding device. The shaft hole withdrawing device 44A includes two engaging claws 6A, and is provided with an air cylinder 6B and a rod 6C. When the air cylinder 6B raises the rod 6C, the engaging claws 6A and 6A are closed. When the air cylinder 6B is lowered and the rod 6C is lowered, the engaging claw 6A is opened to advance in the radial direction and the diameter is increased and retracted. As 6D.
[0029]
Further, another air cylinder 7A is provided above the radial moving means 6D, and the rod 7B separates the unit including the engaging claw 6A and the radial moving means 6D from the axial center of the elastic wheel to be removed. , And constitutes axial-axis direction retreating means for removing the mold from the mold.
[0030]
FIG. 9 shows an example of the dispersing-engagement-hole pulling-out device 44B constituting the demolding device. The dispersing engagement hole pulling device 44B has a 90 ° angle corresponding to the four dispersing engagement holes 51 distributed in the circumferential direction on the outer periphery of the shaft hole provided in the base inner ring shown in FIG. It is provided with four engaging claws 6a arranged at positions and an air cylinder 6b for moving the engaging claws 6a in the radial direction, and for moving the engaging claws 6a in the axial direction of the inner ring for the base. An air cylinder 7a is provided.
[0031]
FIGS. 10A and 10B show examples of the mechanism for moving the engaging claw 6a forward and backward. The mechanism for moving the engaging claw 6a is provided with an air cylinder 6b, a rod 6c, and a telescopic lever body 6d. When the air cylinder 6b raises the rod 6c, the telescopic lever body 6d breaks and contracts, and the engaging claw 6a is moved to the center. When the air cylinder 6b lowers the rod 6c, the telescopic lever 6d is oriented in the horizontal direction, and the engaging claw 6a advances in the radial direction (FIG. 10 (a)). b)).
[0032]
According to the device shown in FIG. 10, the air cylinder 6b generally has only two positions, ie, an advanced position and a retracted position. (FIG. 12 (a)), and the engaging pawl 6a engages with the peripheral edge of the distributed engaging hole 51 at the advanced position (FIG. 12 (b)).
[0033]
In the case where the radii at which the dispersing engagement holes 51 are arranged and formed are different, and when there are two types of radii, the arrangement radius is large at the position of the engagement claw 6a at the advanced position and the retracted position of the air cylinder 6b. After the engaging pawl 6a is inserted into the dispersing engagement hole 51 by operating the axially extending / retracting means, the release device 6 is rotated. Thereby, the engaging claw 6a is engaged with the peripheral edge of the distributed engaging hole 51, and the mold is released.
[0034]
If the air cylinder 6b uses a method of controlling the advanced position, or a position controllable radial reciprocating means such as a servomotor is used in place of the air cylinder, the position of the engaging claw 6a can be changed by the first-stage reciprocating operation. A second stage in which the radially extending means is further operated after the engaging claws 6a are inserted into the dispersed engaging holes 51 by operating the axially extending and retracting means so as to match the positions at which the arrangement radii can be inserted into the dispersed engaging holes 51 having different radii. , The engaging claw 6a is engaged with the peripheral edge of the dispersing engaging hole 51, and the mold can be released.
[0035]
Although the example of the dispersing engagement hole 51 is circular, the present invention is not limited to this. For example, the dispersing engagement hole 51 may be a long hole curved in the circumferential direction.
[0036]
Next, a method of removing the elastic ring using the removal device in the continuous production line of the present embodiment will be described.
[0037]
After the elastic ring q is formed using the molding die 1 and reaches a predetermined position before the demolding device on the demolding stage ST5, the air of the molding die fixing device 40 is manually operated or automatically controlled by an operator. The cylinder 4c advances the stopper member 4b in the radial direction of the mold 1 to bring each stopper member 4b into contact, and at the same time, the protrusion 4d is fitted into the annular groove 1a to fix the mold 1.
[0038]
The removal stage ST5 of the production line is provided with a shaft hole drawing device 44A and a dispersion hole drawing device 44B. Two fixing devices may be provided corresponding to the respective drawing devices, and the shaft hole drawing device 44A and the dispersion hole drawing device 44B can be moved to the corresponding positions of the fixing device with one fixing device as one. May be configured. The molding die 1 is placed on a conveyor device such as a roller conveyor and moves on a line.
[0039]
When the engagement portion of the base inner ring is an elastic ring q having a shaft hole, the shaft hole pulling device 44A is used. FIG. 11 shows the removal state in this case. The radial movement mechanism 6D of the engaging claw raises the rod 6C to retract the engaging claw 6A in the axial direction, and the air cylinder 7A constituting the axial direction moving means moves down the rod 7B in a state where the diameter is reduced. The engagement claw 6 </ b> A descends and enters the shaft hole 5.
[0040]
Then, as shown in FIG. 11 (b), after the radial advance / retreat mechanism 6D of the engaging claw 6A lowers the rod 6C to expand the diameter of the engaging claw 6A and engages with the peripheral edge of the shaft hole 5, the air is released. When the cylinder 7A raises the rod 7B, the elastic wheel q is released.
[0041]
In the case where the engaging portion of the base inner ring is an elastic ring q which is a dispersed engaging hole, a dispersing hole extracting device 44B is used.
[0042]
With the elastic ring and the axis of the dispersing hole extracting device 44B aligned with each other, the engaging claw radial advance / retreat mechanism 6e moves the rod 6c so that the engaging claw 6a comes to the circumferential position of the dispersing engaging hole. Match. Next, the rod 7b is moved down by operating the air cylinder 7a, which is axially moving means, so that the engaging claws 6a are inserted into the dispersing engaging holes 51. After the insertion, the engaging claw 6a is slightly moved in the circumferential direction by manual or automatic control of an operator, so that the engaging claw 6a is engaged with each of the dispersing engagement holes 51, and the air cylinder 7a is operated to move the rod 7b. To raise. The elastic wheel q is released by such an operation.
[Brief description of the drawings]
FIG. 1 is a schematic view illustrating the entire configuration of a continuous production line for elastic rings. FIG. 2 is a side view illustrating a forming die (die) for forming an elastic ring. FIG. FIG. 4 is a plan view and a longitudinal side view of an inner ring for a base body of a shaft hole type. FIG. 5 is a plan view and a longitudinal side view of an inner ring for a base body of a distributed engagement hole type. FIG. FIG. 7 is a cross-sectional view showing a state in which an elastic ring is formed using the base inner ring of FIG. 7; FIG. 7 is a cross-sectional view showing a state in which an elastic ring is formed using a distributed engagement hole type base inner ring; FIG. 9 is a side view illustrating an example of a hole extracting device. FIG. 9 is a side view illustrating an example of a dispersion hole extracting device. FIG. 10 is an explanatory diagram illustrating the movement of an engagement claw of the dispersion hole extracting device. FIG. 12 is a cross-sectional view showing a demolding process using a shaft hole drawing device. FIG. 12 shows a demolding process using a dispersion hole drawing device. Sectional view and FIG. 13 is a perspective view of an acoustic wheel 14 is a sectional view showing the demolding method of conventional elastic wheel EXPLANATION OF REFERENCE NUMERALS
REFERENCE SIGNS LIST 1 Molding die 1a Annular groove 2 Base inner ring 2A Shaft hole type base inner ring 2B Distributed engagement hole type base inner ring 23 Elastic material ring-shaped body 4 Demolding device 40 Fixing device 4b Stopper member 5 Shaft hole 51 Dispersion member Mating holes 6A, 6a Engaging claws 6D, 6e Engaging claw radial direction retreating means 7A, 7a Axial direction retreating means q Elastic ring

Claims (6)

An elastic ring in which an elastic material is cast into an outer cavity of an inner ring for a base having a shaft hole disposed in a bottomed cylindrical mold, and a ring-shaped body made of an elastic material is laminated on an outer peripheral surface of the inner ring for the base. A demolding device for demolding the elastic ring disposed on a continuous production line for producing from the molding die,
A fixing device for fixing the molding die, and a drawing device for moving the elastic ring in the axial direction from the molding die and removing the molding die,
The pulling device includes a plurality of engaging claws that engage with an engaging portion of the base inner ring, an axial direction moving unit that moves the engaging claw in an axial direction, and the engaging claw that includes the engaging portion. A radial moving means for moving the base inner ring in the radial direction in accordance with the position of the elastic ring. The engagement portion is an end face of a shaft hole of the inner ring for the base, and the pulling device is configured to advance and expand after the engagement claw is retreated in the radial direction and inserted through the shaft hole in a state of reduced diameter. The removal device for an elastic wheel according to claim 1, wherein the device is a shaft hole drawing device configured to engage with an end surface of a shaft hole of the inner ring for the base. The engaging portion is a plurality of distributed engaging holes distributed in the circumferential direction at an outer peripheral position of a shaft hole of the base inner ring, and the engaging claw is provided by the engaging claw advancing / retreating means. The elastic wheel according to claim 1, wherein the elastic wheel is a dispersing engagement hole pulling device configured to move in the axial direction after being adjusted so as to be located at the mating hole position, to be inserted into the engagement hole, and to be engaged therewith. Demolding equipment. The fixing device is configured such that a pair of stopper members provided on a cylindrical outer peripheral surface of the molding die with a projection fitted on an annular groove formed in a circumferential direction of the molding die on an abutting surface are provided on the molding die. The device for removing an elastic wheel according to any one of claims 1 to 3, wherein the device is arranged so as to be able to move back and forth in the radial direction. An elastic ring in which an elastic material is cast into an outer cavity of an inner ring for a base having a shaft hole disposed in a bottomed cylindrical mold, and a ring-shaped body made of an elastic material is laminated on an outer peripheral surface of the inner ring for the base. A demolding method of demolding the elastic ring from the molding die using a demolding device arranged in a continuous production line for producing
The demolding device includes a fixing device that fixes the molding die, and a drawing device that removes the elastic ring by moving the elastic ring in the axial direction from the molding die,
The pulling device includes a plurality of engaging claws that engage with an engaging portion of the base inner ring, an axial direction moving unit that moves the engaging claw in an axial direction, and the engaging claw that includes the engaging portion. Radially retreating means for reciprocating in the radial direction of the base inner ring in accordance with the position of the base inner ring, fixing the molding die with a fixing device, and setting the engaging claw of the drawing device to the base inner ring of the base inner ring. A method of removing an elastic wheel, comprising: engaging an engaging portion, moving the engaging claw in the axial direction, and releasing the elastic wheel from the molding die. The demolding device is provided with the shaft hole drawing device according to claim 2 and the dispersion engagement hole drawing device according to claim 3, and different inner races for bases manufactured by a continuous manufacturing line. 6. The method for removing an elastic ring according to claim 5, wherein a drawing device is selected and used according to the inner ring for the base of the elastic ring provided with:

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