KR200481279Y1 - Vent Apparatus for Tire Vulcanizing Mold - Google Patents

Abstract

The present invention provides a venting device for a tire vulcanization mold in which the strength of the main body is maintained, the flow and discharge of air are smooth, and assembling and manufacturing are simple.
The venting device for a vulcanized metal mold comprises a casing 10 integrally provided with an opening 12, a vent hole 14, a supporting end 16 and a discharging portion 18 and having a longitudinal section 101; An elastic member (20) elastically movably inserted into the vent hole (14) of the casing (10) and having a lower end supported by a supporting end (16) of the casing (10); And a body 30 integrally provided with a head portion 32, a body portion 34, a support end 36, a stopper 38 and a reinforcing portion 39. The reinforcing portion 39 is provided with a foreign substance The total area of the guide groove 391 with respect to the total surface area of the reinforcing portion 39 excluding the guide groove 391 is set to 1: 0.27 to 0.33 do.

Description

Technical Field [0001] The present invention relates to a vent device for a tire vulcanizing mold,

The present invention relates to a venting apparatus for a tire vulcanization mold, and more particularly to a ventilation apparatus for a tire vulcanization mold in which strength of a main body is maintained, airflow and discharge are smooth, and assembly and manufacture are simple.

Generally, when the semi-finished tire molding process is completed in the tire manufacturing process, a vulcanizing process is performed to make the green tire as a final finished product. The green tire produced in a raw state is vulcanized in a high-temperature high-pressure vulcanizing mold to complete the final tire. Here, the vulcanizing mold is constituted by a bladder for pressing the mold part and the tire to the mold, and a vent hole for discharging the air existing between the tire and the mold to the outside of the mold is provided on the inner side surface of the mold.

These vent holes are vented together with the rubber of the green tire by the air pressure as well as the vulcanization pressure to form the vent rubber on the surface of the finished tire. Accordingly, a trimming process for removing the vent rubber from the finished green tire is essentially performed.

Since such a trimming process causes a decrease in productivity and productivity, most of the vulcanization molds in most tire production or production lines are equipped with venting devices. One prior art example of such a venting device is known from Patent No. 10-0956242.

The mini-vent for a tire vulcanizing mold disclosed in Japanese Patent No. 10-0956242 includes a casing having a vent hole formed vertically in the center thereof and a valve body elastically supported by a spring in order to open and close a vent hole of the casing The valve body is composed of an upper head portion and a stopping shaft portion. At the lower end of the shaft portion, a stopper portion having a diameter larger than that of the shaft portion is integrally provided in order to prevent its separation from the casing ; An engaging projection for engaging with the stopper portion is protruded from the lower inner peripheral surface of the casing; A plurality of locking projections are formed on the inner circumferential surface of the casing so as to protrude in a point shape at regular intervals.

The minivent according to the above-described configuration is mainly composed of the casing and the valve body, thereby improving the work efficiency and the part precision by reducing the work flow rate during the assembly work, It is possible to prevent the occurrence of defects such as separation of the valve body from the casing due to breakage or deformation of the stopper.

As another known example, the venting apparatus for a tire vulcanizing mold disclosed in Japanese Patent No. 10-1346718 includes a hollow casing provided in a vent hole of a tire vulcanizing mold; And a rubber inflow preventing vent means provided so as to be movable through an elastic member on the inside of the casing and configured to isolate the elastic member from the elastic member in order to prevent the rubber introduced during vulcanization from adhering to the elastic member, The rubber inflow preventing vent means includes a rod-shaped movement guide portion provided at the bottom of the casing and a valve body having a movement guide groove formed therein to be extrapolated to the movement guide portion, And is provided in the movement guide portion and is configured to be isolated.

According to this configuration, the rubber introduced into the inside is prevented from adhering to the spring, so that the operation of the venting device can be smoothly performed, thereby preventing defects in the finished tire, and eliminating the need for additional parts such as a stopper, And the manufacturing cost can be reduced.

However, the above-mentioned patent No. 10-0956242 and the conventional vent apparatus have been proved to cause some problems. First, the flow of air at the lower end of the casing is blocked at a normal time, so that the foreign matter is accumulated or piled up to cause malfunction of the vent device itself. In addition, Since the machining tolerance at the lower end of the pin is not constant depending on the product, the function of the vent device may not be formed due to the precise desorption or gap between the valve body and the casing, the guide groove at the lower end of the pin is fragile, It is difficult to assemble precisely and stably when assembling the semiconductor device.

In addition, Japanese Patent No. 10-1346718 has a problem that workability and productivity are deteriorated because a moving guide groove must be separately machined in the inside of a valve body and a difficult and skilled technique is required to insert an elastic member into the valve body.

On the other hand, as shown in Figs. 1 and 2, according to a vent valve disclosed in European Patent No. 1,998,946 as another known example, a valve insert 2 and a valve sleeve (spring) 1, which is a vent valve used in a venting hole of a vulcanized mold, in particular in a thread profile area, the valve insert 2 having a conical surface with a disc 5 at one end and a conical end from the other end to the conical end Wherein the movement of the valve insert defines a boundary for opening the valve and the inner surface of the valve sleeve is located at a distance from the disk, A conical surface 7 is provided and an inner surface 8 is formed at a position spaced from the disk 5 and the boundary opening of the valve is defined by the intervening valve insert 2 and the valve 2 (6, 7) or its circle The conical surface 9 formed at the end of the valve shank 4 of the valve insert 2 is formed by a part of the surface 6,7 of the valve sleeve 2 and the conical surface 8 of the valve sleeve 1, And the valve sleeve 1 is disposed closer to the disc 5 of the valve insert 2 and has an outer diameter corresponding to the diameter of the hole of the vulcanization mold for embedding the vent valve, (2) is spaced apart from the disk (5), and the spaced apart portion of the valve sleeve (1) has an outer diameter smaller than the diameter of the hole of the vulcanization mold for filling the valve vent, Characterized in that said spaced apart portion of the sleeve (1) is provided with a longitudinal opening with at least two notch grooves or forming protrusions.

Due to this technical feature, the vent valve of EP 1,998,946 is easily disassembled into the space of the vulcanization mold by the force acting in the axis direction of the valve insert, even though the valve insert restricts the opening movement, And the air is smoothly discharged through the longitudinal notches or openings to provide the effect of maintaining the functionality.

However, the vent valve does not allow the air and / or foreign matter introduced through the conical surface of the sleeve to be quickly transferred to the lower portion, so that the foreign matter is deposited or accumulated between the inner surface of the sleeve and the valve insert or between the spring and the insert, Can be lowered.

Particularly, since the conical surface of the lower part of the insert and the conical surface of the lower part of the sleeve are not brought into contact with each other or are not properly contacted with each other, the insert is eccentric so that accurate opening and closing of the valve insert to the sleeve can not be guaranteed. There is a problem that it is difficult to manufacture a part such as a conical surface because it needs to be machined.

The object of the present invention is to improve the strength of the main body and to prevent the foreign matters from being accumulated and to be easily assembled In addition, the eccentricity of the main body can be prevented, the accurate opening and closing action can be ensured, foreign matter or debris can be prevented from being deposited and accumulated on the inside of the casing, the elastic member and the main body, And to provide a vent device for a tire vulcanizing mold that is easy to manufacture.

It is an object of the present invention to provide a ventilation apparatus for a tire vulcanizing mold which comprises an opening formed in a tapered shape so as to allow air to be sucked in or sucked into an upper portion thereof and a vent hole And a plurality of cut-out portions for maintaining the discharge of the air introduced through the vent holes at all times and for expanding and returning the diameter of the vent holes, A casing having a longitudinal section forming a flat surface; An elastic member inserted elastically into a vent hole of the casing and a lower end supported by a support end of the casing; A body part formed integrally with the head part and inserted into the vent hole of the casing in a reciprocating manner so that the elastic member can be elastically moved; A supporting part formed on the upper part of the body part to support the upper end of the elastic part and a lower part of the casing part integrally formed at the lower end of the body part and exposed to the lower end of the casing so as to define a reciprocating motion and an air- A stopper formed between the head portion and the support end and having a guide groove for guiding and conveying foreign matter introduced between the opening portion of the casing and the head portion; Wherein the reinforcing portion of the main body has a portion Wherein the guide groove is spirally formed on the outer surface of the reinforcing portion and the total area of the guide groove with respect to the entire surface area of the reinforcing portion excluding the guide groove is set to 1: 0.27 to 0.33. Can be achieved by a venting device for a vulcanizing die.

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According to another feature of the present invention, the stopper of the main body is rounded so as to pass through the vent hole and the discharge portion of the casing when assembling the main body with respect to the casing from the terminating end, and has a diameter corresponding to the diameter of the main body portion And when the discharge portion of the casing is deployed or opened by the respective cut-out portions by the urging of the head portion when assembling the main body with respect to the casing, the lower end portion of the casing And a stopper part integrally formed on the upper end of the tapered part for preventing the main body from being separated from the casing or escaping from the casing after the main body is completely assembled with the casing is integrally formed with the tapered part Respectively.

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According to the venting apparatus for a tire vulcanizing mold according to the present invention, since the main body maintains a constant diameter as a whole and a relatively weak portion is not formed, the strength is maintained constant and the service life is prolonged. The main body can be assembled to the casing by a simple pressing method, so that the assembly and maintenance can be easily performed. In particular, a spiral groove is formed in the upper body of the main body So that foreign substances or sludge are prevented from being accumulated between the casing and the main body, and the lower end of the casing and the stoppers of the main body make horizontal surface contact with each other, The opening and closing operation is precisely performed without eccentricity, so that the functionality is maintained at its best, and The structure is simple and the manufacturing is simple, so that reliability, productivity, productivity and workability are remarkably improved.

1 is a sectional view showing a conventional vent valve;
2 is a plan view showing eccentricity of a valve insert of the vent valve of FIG.
3 is an exploded perspective view of a venting device for a tire vulcanization mold according to the present invention.
Fig. 4 is a longitudinal sectional view of the casing and the main body of the tire vulcanizing mold vent apparatus shown in Fig. 3; Fig.
FIG. 5 is a perspective view showing a state in which the vent device of FIG. 1 is assembled. FIG.
Fig. 6 is a longitudinal sectional view of the venting device of Fig. 5, showing a state in which the venting device is opened. Fig.
Fig. 7 is a longitudinal sectional view of the venting device of Fig. 5, showing a state in which the venting device is closed; Fig.
8 is a plan view of the venting device of FIG. 5;
FIG. 9 is a front view showing various shapes of the discharge portion of the casing of the vent apparatus according to the present invention; FIG.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

3 to 9, the venting apparatus for a tire vulcanizing tool according to one preferred embodiment of the present invention basically comprises a casing 10, an elastic member 20 inserted into the casing 10 to be operated in cooperation with the casing 10 And a main body 30.

More specifically, the casing 10 is formed of a metal and is formed into a housing-type or hollow-type.

An opening 12 through which air is introduced or sucked is formed in the upper portion of the casing 10. It is preferable that the opening 12 is formed so as to be tapered downward toward the central axis of the casing 10. [

A vent hole 14 for guiding and guiding air introduced through the opening 12 is formed in a lower portion of the opening 12 of the casing 10 in the longitudinal direction of the casing 10.

A support end 16 is formed at a lower portion of the vent hole 14 of the casing 10 so that the lower end of the elastic member 20 is fixed.

The lower end portion or the end portion of the casing 10, which is applied to the venting device for a tire vulcanizing mold according to the present invention, is provided with a discharge portion 18 for maintaining the discharge of air at all times. It is preferable that the discharge portion 18 is normally kept in its diameter for the rigidity of the casing 10. [

Particularly, it is preferable that the discharge portion 18 is provided with a cut-out portion 181 for facilitating the discharge of air at all times and for facilitating the insertion of the main body 30 easily and stably. In the preferred embodiment of the present invention, two incisions are formed. However, in consideration of smooth discharge of air, easy and stable insertion of the main body 30, and prevention of disengagement of the main body 30 after insertion And may be set to two or more. In addition, the shape of each cutout 181 may be formed in various shapes such as a rectangle, an inverted triangle, and an ellipse. Further, it is preferable that the entire casing 10 or the discharge portion 18 has elasticity, and it is preferable that the discharge portion 18 is returned to the original state after the diameter of the discharge portion is expanded in the assembling process described later.

It is preferable that the longitudinal end face 101 of the lower end portion of the casing 10 be a flat surface for accurate and stable contact with the support surface of the main body 30 described later.

The elastic member 20 applied to the tire vulcanizing mold vent apparatus according to the present invention is preferably formed as a cylindrical coil spring. Of course, the elastic member 20 is inserted into the vent hole 14 of the casing 10 so as to be elastically movable. One end or the lower end of the elastic member 20 is supported by a support end 16 formed inside the casing 10 and the other end or the upper end of the elastic member 20 is formed on the upper portion of the main body 30 And is elastically supported by a supporting end.

The main body 30 applied to the tire vulcanizing mold vent apparatus according to the present invention has a sufficient diameter to maintain overall rigidity, and in particular, it has a feature that no soft portion or weak portion is formed for assembly and movement.

More specifically, the head portion 32 is formed on the upper portion of the main body 30. [ The side surface of the head portion 32 is formed so as to be tapered in the same or similar manner as the opening portion 12 with a downward center. As a result, the side surface of the head portion 32 is attached to and detached from the opening portion 12, so that the inflow or outflow of air is controlled.

The main body 30 is formed with a body portion 34 which is inserted into the vent hole 14 of the casing 10 and extruded so that the elastic member 20 can elastically move. The diameter of the body portion 34 is preferably set to maintain the overall rigidity of the body 30. [

And a support end 36 is formed on an upper end of the body portion 34 so that the other end or the upper end of the elastic member 20 is supported and elastically moved.

Particularly, a stopper 38 is formed at the lower end of the main body 30 to limit the reciprocating movement of the main body 30 with respect to the casing 10. [

The stopper 38 is provided at the end of the stopper 38 so as to smoothly and easily penetrate the vent hole 14 and the discharge portion 18 of the casing 10 when the main body 30 is assembled to the casing 10. [ It is preferable that the penetrating portion 381 is formed.

The discharge section 18 of the casing 10 is formed at the upper end of the penetration section 381 by pressing against the head section 32 of the main body 30 when the main body 30 is assembled to the casing 10. [ It is preferable that a tapered portion 382 inclined downwardly is formed integrally so that the lower end of the casing 10 can be easily penetrated when each of the cutouts 181 is deployed or opened.

The upper end of the tapered portion 382 is provided with a stopper portion 322 for preventing the main body 30 from being detached or out of the casing 10 after the main body 30 is completely assembled to the casing 10 in the reverse direction, (383) are integrally formed.

Particularly, according to one feature of the present invention, the upper surface 301 of the upper portion of the stopper 38 or the stopper portion 383 is provided with a flat shape for stable contact with the longitudinal surface 101 of the casing 10 .

Since the upper end surface 301 of the main body 30 and the longitudinal end surface 101 of the casing 10 are mutually flat, The uprightness and the centering of the main body 30 can be precisely performed, so that a proper venting action can be provided in a certain phase (FIG. 8).

According to another feature of the present invention, a reinforcing portion 39 having a larger diameter than the body portion 34 is provided between the head portion 32 of the main body 30 and the support end 36 of the upper portion of the body portion 34 So that the rigidity of the main body 30 itself is improved.

Particularly, the air and / or foreign matter introduced into the reinforcing portion 39 between the opening portion 12 of the casing 10 and the head portion 32 of the main body 30 is quickly guided and conveyed into the casing 10 It is preferable that guide grooves 391 are formed so as to discharge them.

It is preferable that a plurality of guide grooves 391 are formed in the reinforcing portion 39 within a range that maintains the rigidity of the reinforcing portion 39 and the entire body 30.

Each of the guide grooves 391 extends from the lower end of the head portion 32 and the upper end of the reinforcing portion 39 to the lower end of the reinforcing portion 39 and the lower end of the body 39, It is preferable that the connection portion is formed up to the upper end of the portion 34.

The guide groove 391 is preferably formed in a spiral shape or a spiral shape along the longitudinal direction of the reinforcing portion 39. According to this structure, foreign matter or sludge introduced into the gap between the opening 12 of the casing 10 and the head portion 32 of the main body 30 quickly flows into the casing 10 along the guide groove 391, .

Particularly, in the reinforcing portion 39, the total area of the guide groove 391 with respect to the total surface area of the portion excluding the guide groove 391 is preferably set to 1: 0.27 to 0.33. If the total area of the guide groove 391 is less than 0.27, the conveying and discharging performance of air and / or foreign matter may be deteriorated. On the other hand, if the total area exceeds 0.33, the overall strength of the reinforcing portion 39 may be reduced. Therefore, in the reinforcing portion 39, the total area of the guide groove 391 with respect to the entire surface area of the reinforcing portion 39 excluding the guide groove 391 is most preferably set to 1: 0.3.

Hereinafter, the assembling method of the venting device for a tire vulcanizing mold and the operation and effect thereof, which are constructed as described above, will be described in detail.

First, the operator or the manufacturer sets sizes of the casing 10, the elastic member 20, and the main body 30 according to the specifications and capacities of the vent apparatuses, and then prepares them by respectively making or molding them.

The elastic member 20 is inserted into the body portion 34 of the main body 30 and then the stopper 38 of the main body 30 is inserted through the opening 12 of the casing 10 And the stopper 38 is inserted and preliminarily assembled until it reaches the discharge portion 18 of the casing 10 until it comes into contact.

When the operator presses or hits the head portion 32 of the main body 30 in the state where the elastic member 20 and the main body 30 are preassembled in the casing 10 as described above, The tapered portion 382 advances downward while pressing the discharge portion 18 of the casing 10 in the radial direction. At this time, as the pressing force by advancing the tapered portion 382 is applied to the discharge portion 18 of the casing 10, the diameter of the discharge portion 18 is expanded as the cut portion 181 is opened or opened, And the assembly of the main body 30 can be performed at the same time.

Thereafter, when the main body 30 continuously advances and the stopper 38 completely comes out of or passes through the discharge portion 18 of the casing 10 and the main body 30 is completely assembled to the casing 10, Release the batting force. The cut portion 181 of the casing 10 is restored to its original state and the discharge portion 18 of the casing 10 is returned to its original state when the pressing force or the biasing force against the main body 30 is removed, The assembling work is completed while the vertical face 101 and the upper end face 301 of the main body 30 are in face-to-face relationship.

Alternatively, in a state in which the main body 30 is completely assembled to the casing 10, the operator presses the discharge portion 18 of the casing 10 to return the cut portion 181 to its original state or to narrow the gap further have. Such optional matters can be made as necessary in terms of the material and the characteristics of the entire casing 10 or the discharge portion 18, or in terms of productivity and safety.

The venting device thus completed is installed in the vulcanizing mold of the tire and as the body 30 reciprocates by the pressure in the vulcanizing mold or by the action of the elastic member 20, The vent hole 14, and the cut-out portion 181, as shown in Fig. 6, the air or foreign matter in the vent hole 14 of the casing 10 is always discharged through the cut-off portion 181, which is sufficiently opened, to thereby prevent an oil mist, a fume, a dust, The sludge accumulation is completely prevented.

Particularly, according to one feature of the present invention, the upper end surface 301 of the main body 30 and the longitudinal end surface 101 of the casing 10 at the time of opening of the vent apparatus are flat and accurately contact with each other. As a result, the distance between the opening 12 of the casing 10 and the head portion 32 of the main body 30 is accurately maintained, so that the main body 30 is smoothly and completely vented You can.

According to another feature of the present invention, the foreign matter or sludge introduced through the opening 12 of the casing 10 is quickly conveyed along the guide groove 391 formed in the reinforcing portion 39 of the main body 30 And dispersed. As a result, since the foreign matter or sludge is discharged without being deposited on the elastic member 20 as well as the main body 30, the function of the vent device can be normally maintained.

 Therefore, according to the tire vulcanizing mold vent apparatus according to the present invention, the strength of the main body is stably maintained and the service life is prolonged, the flow and discharge of the air through the branch portion are smooth, the foreign matter is prevented from being accumulated, It is possible to easily assemble the main body and the casing and prevent the foreign matter or the sludge from being accumulated between the casing and the main body due to the rapid movement and discharge of air and foreign matter by the spiral grooves of the main body, So that it is possible to accurately open and close the casing without eccentricity of the main body.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention .

10: casing 12: opening
14: vent hole 16: support end
18: discharge part 20: elastic member
30: main body 32: head portion
34: body portion 36: support end
38: stopper 39: reinforcing portion
101: longitudinal section 181:
301: top surface 381:
382: tapered portion 383: stopper portion
391: Guide groove

Claims (4)

A vent device for a tire vulcanization mold,
A vent hole 14 formed in a lower portion of the opening 12 to guide and guide the air introduced through the opening 12; A support end 16 formed at a lower portion of the vent hole 14 and a plurality of cutouts 181 for maintaining the discharge of the air introduced through the vent hole 14 and for expanding and returning the diameter A casing (10) having a longitudinally extending discharge portion (18) having elasticity and a longitudinal section (101) forming a flat surface;
An elastic member 20 elastically movably inserted into a vent hole 14 of the casing 10 and having a lower end supported by a support end 16 of the casing 10; And
A head portion 32 formed integrally with the head portion 32 and capable of being reciprocated in the vent hole 14 of the casing 10; And a supporting end 36 formed on the body 34 and on which the upper end of the elastic member 20 is supported, And a lower end of the casing 10 which is integrally formed at a lower end of the casing 10 and is exposed to the lower end of the casing 10 so as to define a reciprocating motion and an air discharge gap with respect to the casing 10, A stopper 38 formed with a flat top surface 301 releasably interposed between the head portion 32 and the support end 36 and formed with an opening 12 of the casing 10, A reinforcing portion 39 having guide grooves 391 for guiding and conveying foreign matter introduced into the head portions 32 And a body (30) comprising:
The diameter of the reinforcing portion 39 of the main body 30 is set to be larger than the diameter of the body portion 34. The guide groove 391 is formed in a spiral shape on the outer surface of the reinforcing portion 39, Wherein a total area of the guide groove (391) with respect to the total surface area of the reinforcing portion (39) excluding the guide groove (391) is set to 1: 0.27 to 0.33.
delete 2. The apparatus according to claim 1, wherein the stopper (38) of the main body (30)
And is formed to be rounded so as to penetrate through the vent hole 14 and the discharge portion 18 of the casing 10 when the main body 30 is assembled to the casing 10 and has a diameter corresponding to the diameter of the main body portion 34 A through-hole 381 having a through-
And the discharge portion 18 of the casing 10 is integrally formed on the upper end of the penetrating portion 381 and is pressed against the head portion 32 when the main body 30 is assembled to the casing 10. [ A tapered portion 382 which is inclined downwardly so as to pass through the lower end of the casing 10 when it is deployed or opened by each cutout portion 181,
A stopper 382 integrally formed on the upper end of the tapered portion 382 for preventing the main body 30 from moving upward or out of the casing 10 after the main body 30 is completely assembled to the casing 10, (383) are integrally formed on the inner wall of the vent wall.
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