KR910007779Y1 - Pattern change and air venting device for tire vulcanising mould - Google Patents

Abstract

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Description

Letter change and air leak device in tire vulcanization mold

1 is an exploded perspective view of an embodiment of the present invention.

Figure 2 is a longitudinal cross-sectional view showing the assembly state in the mold of the present invention.

Figure 3 is an enlarged partial cutaway showing the assembled state of the valve body related to the present invention.

* Explanation of symbols for main parts of the drawings

1: mold 2: groove

4: hole 5: screw hole

10: dial 11: tapered ball

12: screw hole 14: vertical surface

15: inclined surface 20: assembly bolt

20 ': tofu 21: outer circumference

22: neck 23: screw

24: valve seat 25: wrench ball

26: perturbation hole 27: through hole

27 ': cone 28: platemaker

29: pin 30: valve body

31: valve head 32: junction

33: valve stem 34: cutout

35: niche 36: longevity

37: Slit 38: Center hole

39: spring 40: cap

41: incision 42, 42 ': vertical wall

43: threaded portion 44: hexagonal hole

45: hexagonal knit

The present invention is a tire vulcanization mold composed of a dial changing device and an air leaking device that can be used to replace only the dial that forms letters such as tire specifications and quality on both side surfaces of the tire according to the type of the tire. The present invention relates to a letter changer and an air leakage device.

In order to form letters on the side surface of a conventional tire, these letters have been used by directly forming intaglio or emboss on the parts where the letters are expressed on the mold itself of the tire. While the appearance of the parts is beautiful and clean, each mold has to be manufactured separately for each letter, so the production cost of the mold is excessively used, and productivity is lowered due to frequent replacement of molds. There was a problem such as having to install a separate discharge device for air discharge.

The other is that the mold of the tire is divided into the tread and the side parts to form letters on both side parts to replace only this side mold, but the appearance of the tire being manufactured is beautiful, but this too Since many side molds have to be manufactured, not only mold production cost is excessively consumed, but also the molds must be replaced every time, resulting in low productivity, which requires the installation of a separate air discharge device for exhausting air from the mold. There was a problem.

Another is the simplest method, which uses a thin plate of thin plates on the inner surface of the mold as a screw, which is the least expensive and extremely easy to replace. That's how it is.

However, even if the dial is made of thin plates, it is inferiorly exposed to the surface of the tire, and is also exposed to the surface of the tire to the screw head, and its appearance is extremely poor, and there is also an air discharge device inside the mold. There was a problem such as need to be installed separately.

Another suggests a recess in which a dial may be inserted into the mold, and it has been proposed to insert a dial therein to fix the dial as a bolt at the bottom of the mold. However, the appearance of the manufactured tire is good and only the dial is used. The manufacturing cost is cheaper because it can be replaced, but the dial must be replaced after the bolt is inserted at the bottom of the mold, so the dial must be replaced after removing the mold from the vulcanizer. Since it is necessary to reassemble, the replacement time of the dial is long, the productivity of the tire is lowered, and this also has a problem such as having to separately install an air discharge device inside the mold.

Therefore, an object of the present invention is to replace the dial inside the mold with the tire vulcanization mold installed in the vulcanizer, and at the same time tire vulcanization mold which can discharge the air inside the mold when the tire is molded. It is to solve the above-mentioned problems by providing a letter change and air leakage device.

That is, in order to achieve the above object, in the tire vulcanization mold of the present invention, in order to achieve the above object, a character groove and a recess groove are formed in a predetermined portion of the inner surface of the vulcanization mold of the tire, and the dial is inserted therein. The screw holes are formed through the holes and the bottom of each of the recessed grooves, respectively, and the hexagonal nuts are inserted into the caps to be screwed together, and the dial inserted into the recessed grooves has the data holes and the stepped surfaces at both ends thereof. A screw hole is formed to form a hole corresponding to the hole of the mold, and an assembly bolt is inserted thereinto screw the hexagonal nut. The valve body is press-fitted into the assembly bolt to insert the spring portion inserted into the valve body. By the force, the valve body is configured to protrude upward.

In addition, the dial is connected to the outer periphery and is formed by connecting the vertical surface and the inclined surface, and when the dial is inserted into the recess groove of the mold, the vertical surface and the side wall of the recess groove are configured to be in close contact.

In addition, the above-described assembly bolt is fitted to the taper hole of the dial with the outer peripheral surface of the head as a tapered surface, and extends and forms the neck and the threaded portion at the center of the bottom of the head, and forms an outlet portion at the end thereof. A valve seat, a wrench hole, a perturbation hole, and a through hole are formed to communicate with each other on the center of the assembly bolt, and a pin hole crossing the perturbation hole is installed at one side of the neck to insert a pin therein. It is composed.

In addition, the valve body forms a head and connects to its outer circumference to form a valve joint, and the valve stem extends from the center to the bottom of the couple, and forms a central hole in the center of the valve stem. A plurality of cutouts are formed on the outer circumferential surface, and long holes and slits communicating therewith are formed near the ends thereof so as to open to the outside, and a spring is inserted into the center hole to insert the valve body into the above-described assembly bolt. The pins inserted into the perturbation hole and crossing the perturbation hole are inserted into the gyre through the slits, and the cutout and the perturbation hole are formed with a gap between the inner circumferential surface.

In addition, the cap forms a cutout to form a hexagonal hole on its center, and a plurality of cutouts are formed on the outer circumferential surface of the valve stem, and the slits in communication with the long hole are formed in the vicinity of the end portion thereof. Insert the spring into the center hole, insert the valve body into the perturbation hole of the assembly bolt, and insert a pin crossing the perturbation hole into the ego hole through the slits. A gap is formed between the cutout and the inner circumferential surface of the perturbation hole.

In addition, the cap is formed in the indentation to form a hexagonal hole on its center, vertical walls on both sides thereof to be inserted into the opposite side of the hexagon nut between the two and formed a threaded portion on the outer peripheral surface of the cap It is composed.

According to the present invention having the configuration as described above, the cap screw in which the hexagon nut is inserted into the screw hole formed in the bottom surface of the mold is screwed in, and the dial is inserted into the recessed groove recessed in the mold. The screwed part of this assembly bolt is screwed into the hexagon nut mentioned above.

In addition, when the spring body is inserted into the perturbation hole through the wrench hole of the cooking bolt, the pin inserted to cross the perturbation hole is inserted into the long hole through the slits formed in the valve body. The head of the valve body protrudes upward and is opened by the force of the interpolated spring of the sieve. Due to the cutout formed on the outer circumferential surface of the valve stem of the valve body, a gap is formed in the perturbation work, and when the raw tire is put into the mold and pressurized and heated to vulcanize, the fresh tire gradually approaches the inner surface of the mold. Since the air inside the valve is in the open state, the air is discharged to the outside through the wrench hole of the assembly bolt, the gap between the inner circumferential surface of the perturbation hole and the cutout portion, and the through hole, so that the raw tire is in contact with the inner surface of the mold. Then, all the air inside leaks and at the same time the valve body is closed.

When replacing the dial, remove the valve body by applying a small amount of force with a drawing tool, and then use a wrench ball formed on the assembly bolt, for example, by pulling the assembly bolt out of the assembly bolt with an L-shaped wrench, and then remove the new dial in the above order. You just need to assemble.

Therefore, the present invention can easily replace the dial in the mold under the condition that the tire vulcanization mold is fixed to the vulcanizer, and at the same time the air in the mold can be easily discharged to the outside when the tire is vulcanized in the mold. It has the advantage of having two functions in a single device, and also the reduction of mold production cost, which can reduce productivity in tire manufacturing and improve productivity by shortening the replacement time of the dial. There is.

Hereinafter, an embodiment of the character change and air leakage device in the tire vulcanization mold of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, the dial 10 has its length determined according to the lengths of the characters displayed on both side surfaces of the tire (not shown), and in Fig. 1 the length of the dial 10 is shown. As the display of the fracture surface, the entire length is shown in an omitted state, and the dial 10 is curved in an arc shape according to the size and type of the tire.

The recessed grooves 2 are provided in the side surface of the vulcanization mold 1 in the same shape as the dial 10, and both end portions of the recessed grooves 2 (only one cross-sectional view is shown in FIG. 2). Holes 4 are laid in the bottom surface 3 of the dies, and screw holes 5 are formed in the bottom surface of the mold 1 so as to communicate with the holes 4.

The dial 10 also forms a taper 11 on its surface at a portion corresponding to the hole 4 at both ends, and forms a screw hole 12 with a step surface 13. The taper hole 11 and the screw hole 12 penetrate the thickness of the dial 10.

In addition, a vertical surface 14 and an inclined surface 15 are formed to be connected to the outer circumference of the screw hole 12 so that the dial 10 is formed in the recess 2 of the mold 1 described above. At the time of insertion, the side wall in the recess 2 and the above-mentioned vertical surface 14 become the joining surface.

In addition, the assembly bolt 20 is to form a head (20 ') in the upper portion, the outer peripheral surface 21 is to be inserted into the tapered hole (11) of the dial 10, the tapered surface, this head 20 The central portion 22 and the threaded portion 23 are extended and formed at the center of the bottom surface of the ') to form a conical portion 27' near the end thereof.

On the center of the assembly bolt 20, the valve seat 24 is formed from the upper head 20 ', and then an L-shaped wrench hole 25, which is a polygonal hole, is formed. In the upper surface of the assembly bolt 20 described above, a perturbation hole 26 having a small step diameter and a through hole 27 having a diameter slightly smaller than the perturbation hole 26 are laid to communicate with them. Allow it to penetrate to the bottom.

Further, the plate hole 28 crossing the perturbation hole 26 is transversely laid in the neck portion 22 of the assembly bolt 20 to insert the pin 29 therein.

Next, the valve body 30 forms a head 31 at the top thereof, extends around its outer periphery and bottom, and forms a valve joint 32 engaged with the valve seat 24 described above.

Further, the valve stem 33 is extended and formed downward from the center of the bottom of the head 31, and the center hole 38 is laid in the inner center of the valve stem 33 so that the lower end is opened. A plurality of cutouts 34 are formed on the outer circumferential surface of the valve stem 33, a long hole 36 is laid at the lower end thereof, and a slit 37 is formed at the lower side thereof, thereby forming the slits 37. The lower side is opened, and the spring 39 is inserted into the above-described center hole 38.

When the valve body 30 is inserted into the perturbation hole 26 through the valve seat 24 and the wrench hole 25 of the assembly bolt 20 described above, the slits 37 are inserted into the pin 29. When the pressure is slightly adjusted to be inserted, the slits 37 are slightly expanded, and the pins 29 are inserted into the holes 36 through the slits 37, and the fixing in the holes 36 is performed. When the moving distance which can be moved up and down by the pin 29 is S, the head 31 of the bar-bar body 30 is moved to the upper surface of the assembly bolt 20 at the same distance as the distance S. Protruding by the force of the spring 39 compressed by the pin 29, and the gap 35 is formed between the perturbation hole 26 due to the plurality of cutouts 34 described above.

In addition, the cap 40 forms an incision 41 on one surface and vertical walls 42 and 42 ′ on both sides thereof, respectively, with the length of the opposite side of the hexagon nut 45 opposite therebetween. Slightly larger, the hexagon nut 45 is inserted therein, and a hexagonal hole 44 penetrating the bottom surface and the bottom surface of the cutout portion 41 is laid, and the threaded portion 43 is formed on the outer circumferential surface of the cap 40. ), And screwed it into the screw hole (5) formed on the bottom surface of the mold (1).

Next, the operation of the present embodiment will be described.

As shown in FIG. 2, the opposite side of the hexagon nut 45 is inserted into the recess 41 between the vertical walls 42 and 42 'on the weak side of the cap 40. 1) Screw the threaded portion (43) of the cap 40 to the threaded hole (5) formed on the bottom surface, at this time L-shaped wrench (illustrated in the back) using the hexagonal hole 44 formed in the cap 40 End), and by rotating the wrench, the cap 40 is screwed into the screw hole 5.

Next, the dial 10 is screwed into the screw hole 12 of the die 1 to the threaded hole 12 formed in the rimless plate 10 to the recessed groove 2 of the mold 1, thereby turning the screw. Grasp and lift it to insert into this recess (2).

A vertical surface 14 is formed in connection with the outer periphery of the dial 10 so that only this vertical surface 14 is in close contact with the inner wall of the recessed groove 2, and the inclined surface 15 connected to the vertical surface 14 is abutted. Since the dial 10 is inserted without a gap when the dial 10 is fitted into the recessed grooves 2, the traces due to the gap generated during the fitting do not appear at all on the appearance of the manufactured tire.

Subsequently, the pin 29 is inserted into the plate hole 28 horizontally installed in the neck portion 22 of the assembly bolt 20, and then inserted into the screw hole 12 through the taper hole 11 of the dial 10. In this case, the threaded portion 23 of the assembly bolt 20 is screwed into the hexagon nut 45 through the hole 4 formed in the mold 1, and at this time, the opposite side of the hexagon nut 45 is vertical. Since the rotation is prevented by the five walls 42 and 42 ', screwing becomes easy.

At this time, a conical portion 27 'is formed at the end of the assembly bolt 20, so that the coupling with the hexagon nut 20 is easy, and the screw coupling with the assembly bolt 20 becomes easy. When the screw is inserted into the wrench hole 25 formed at the center of the head 20 'of the assembly bolt 20, for example, by inserting an L-shaped wrench (not shown) and turning it, the threaded portion 23 of the assembly bolt 20 is turned. The screw hole of the hexagon nut 45 is screwed together, and the tapered outer circumferential surface 21 of the head 20 'of the assembly bolt 20 is inserted into the taper hole 11 of the dial 10.

The valve stem 33 of the valve body 30 is inserted into the perturbation hole 26 through the wrench hole 25 of the assembly bolt 20, but the spring (in the center hole 38 of the valve body 30) 39 is inserted into the valve body 20 so that the slits 37 formed at the end of the valve stem 33 fit with the pin 29 crossing the perturbation hole 26 of the assembly bolt 20. Press the valve body 20 toward the assembly bolt 20 side after adjusting the position slightly, and the pin 29 passes through the slits 37 while the end of the valve stem 33 is slightly expanded. (36) Come inside.

At this time, one end of the spring 39 inserted into the center hole 38 of the valve body 30 abuts against the spring 39 and is compressed to generate a negative force, thereby causing the head of the valve body 30. 31 is protruded upward, the protruding distance thereof is protruded by the vertical movement distance S of the long hole (36).

In addition, a plurality of cutouts 34 are formed on the outer circumferential surface of the valve stem 33 of the valve body 30, and the plurality of gaps 35 are formed between the inner circumferential surfaces of the perturbation hole 26 due to the cutouts 34. ) Is formed.

As described above, when the apparatus is installed inside the vulcanization mold 1 of the tire, the raw tire (not shown) is put into the mold 1 to pressurize and heat to perform vulcanization. Approaching the inner surface of 1).

Accordingly, the air in the mold 1 is projected from the valve seat 24 formed on the head 20 'of the assembly bolt 20 by the head 31 of the valve body 30 by the distance S as described above. It is in an open state, and passes through the plurality of gaps 35 formed between the inner circumferential surface of the perturbation hole 26 through the wrench hole 25 and the cutout portion 34 formed in the valve stem 33. It is discharged to the outside of the metal mold | die 1 through the ball 27, and the junction part 32 of the valve head 31 of this valve body 30 is inserted into the valve seat 24 formed of the assembly bolt 20, and it is sealed. The air inside the mold 1 continues to leak out through the above-mentioned path until it is in a state.

When the surface of the raw tire comes into close contact with the inner surface of the mold 1, all of the air in the mold 1 leaks to the outside and the valve body 30 is closed.

Next, when the dial 10 is replaced with another dial, the head 31 of the valve body 30 is always drawn out by the force of the spring 39 so that the head 31 is drawn out (not shown). When the valve body 30 is held by the pin 29 through the long hole 36 by pulling with a slight force, the pin 29 passes through the slits 37 in communication with the long hole 36. The valve body 30 can be easily pulled out from the assembly bolt 20.

Next, for example, an L-shaped wrench is inserted into the wrench hole 25 of the assembly bolt 20, the assembly bolt 20 is released from the hexagon nut 45, and the assembly bolt 20 is lifted up. The screw holes of the rotating holes (not shown) are screwed into the threaded holes 12 to grasp and lift the rotating holes from both sides of the dial 10, and the procedure for assembling a new dial is the same as described above. You can do it in order.

Therefore, according to the present invention, it is possible to easily replace the dial 10 suitable for the tire produced in the tire vulcanization mold, and at the same time the air in the mold 1 when the tire is vulcanized in the mold 1. In addition, it can be easily leaked to the outside has the feature of performing two functions at the same time.

As a result, the replacement of the dial can be easily performed within a short time, thereby improving productivity and reducing the investment cost of the mold by replacing several dials with the same mold, thereby reducing the cost. In addition, the separately installed air leaking device is installed at the same time to provide convenience in use, and also to bring the effect of reducing the production cost of the mold.

Claims (5)

In the case where the recessed groove 2 is provided at a predetermined portion of the inner surface of the vulcanizing mold 1 of the tire and the dial 10 is inserted thereto, the holes 4 are respectively formed at both ends of the recessed groove 2. The screw hole 5 is formed to penetrate, and the hexagonal nut 45 is inserted into the cap 40 and screwed thereon, and the dial 10 inserted into the above-described groove 2 is tapered at both ends. The hole 11 and the stepped surface 13 are formed to form a screw hole 12 so as to correspond to the above-described holes 4, and the assembly bolt 20 is inserted into the hexagonal nut 45 and the screw. And the valve body 30 is press-fitted to the assembly bolt 20 so that the valve body 30 protrudes upward by the force of the spring 39 inserted into the valve body 30. Character change and air leak in the tire vulcanization mold. The method according to claim 1, wherein the dial 10 is connected to the outer periphery of the dial 10 in contact with the vertical surface 14 and the inclined surface 15, and the dial 10 is a recess 2 of the mold 1 described above. And the side wall of the vertical surface (14) and the recessed groove (2) when inserted into the) is characterized in that the letter change and air leakage apparatus in the tire vulcanization mold. 2. The head of claim 1, wherein the assembly bolt 20 is fitted to the taper hole 11 of the dial 10 using the outer peripheral surface 21 of the head 20 'as a tapered surface. Extends and forms the neck portion 22 and the threaded portion 23 at the center of the bottom of the 20 ', and forms a cone portion 27' at the end thereof, from above on the center of the assembly bolt 20. A valve ball 24, a wrench hole 25, a perturbation hole 26 and a through hole 27 are formed in communication with each other, and a pin ball crossing the perturbation hole 26 at one side of the neck portion 22 ( 28) and the character change and air leakage device in the tire vulcanization mold, characterized in that it is constructed by inserting a pin (29). The valve body (30) according to claim 1, wherein the valve body (30) forms a head (31) and connects to its outer circumference to form a valve joint (32), and the valve joint (32) at the center of the bottom of the head (31). ), The valve stem 33 is extended and formed at the center of the bottom face of the head part 31, the center hole 38 is formed at the center thereof, and a plurality of sections are formed on the outer circumferential surface of the valve step 33. The joint 34 is formed, and the long hole 36 and the slits 37 communicating with the long hole 36 are formed in the vicinity of the end thereof so as to open to the outside, and the spring 39 is inserted into the center hole 38. The valve body 30 is inserted into the perturbation hole 26 of the assembly bolt 20 so that the pin 29 crossing the perturbation hole 26 is the cutout portion 34 and the perturbation hole. Character change and air leakage device in the tire vulcanization mold, characterized in that a gap 35 is formed between the inner peripheral surface of (26). 2. The cap 40 according to claim 1, wherein the cap 40 forms a cutout 41 to form a hexagonal hole 44 over its center portion, and to form vertical walls 42 and 42 'on both sides thereof. A character change and air leaking device in a tire vulcanization mold, characterized in that it is inserted between the opposite sides of the hexagon nut 45 and formed with a threaded portion 43 on the outer circumferential surface of the cap 40.