JPH02241706A - Manufacture of wheel - Google Patents

Abstract

PURPOSE:To improve the production efficiency of a wheel by a method wherein tire pieces are molded with outer molds, the mold surfaces of which are roughened, and a core mold, the mold surface of which is smoothed so as to be easily released from rubber, and, after the core mold is removed under the condition that the tire pieces are held to the outer molds, the outer molds are fixed to each other by pressure so as to bond the tire pieces with each other into an integral body. CONSTITUTION:Tire pieces 130 and 130 are molded with outer molds, the mold surfaces of which are roughened, and a core mold 20, the mold surface of which is smoothed so as to be easily released from rubber. Then, the core mold 20 is removed under the condition that the tire pieces 130 and 130 are held to the outer molds 11 and 12, the outer molds 11 and 12 are fixed to each other so as to bond the tire pieces 130 and 130 with each other into an integral body. Thus, the tire pieces are efficiently bonded with each other into an integral body, resulting in allowing to save plenty of labor and time.

Description

[Detailed description of the invention] (Industrial use IF) The present invention relates to a method for manufacturing wheels.

(Prior art and its problems) Conventionally, a method for manufacturing a wheel in which a tire is integrally formed around a rim as shown in Japanese Patent Application Laid-open No. 63-260408 has been disclosed. 7) is a tire piece that has been molded in a mold, taken out, put into the mold again, and then press-molded to form a tire, so it has a complicated shape and the tire piece is put into the mold. It took a lot of effort and time to do this.

It wasn't practical.

(Method for Solving the Problems) In order to solve the problems of the above-mentioned conventional example, the present invention has two types of molds: the outer mold surface is roughened and the mold surface is a smooth surface that allows the rubber to easily separate. Medium F type processed to 2. (During the evening, clean and shape the tire pieces 130 and 130, and leave the tire pieces 130 and 130 in the outer molds 11 and 12 and use the core mold 2.
0, press the outer molds 11-12 and make a tire piece 1゜3.
This is a method for manufacturing a small ring by joining 0.130 and integrally molding L7.

(Function tS and Effects of the Invention) In this invention, when the tire pieces 130, 130 are molded by the 5 outer mold 1t-iz and the core mold 20 and the core mold 20 is removed, the middle f-type 20 is removed from the surface of the mold. Tire piece 1 is easily molded because the rubber is separated and the surface is smooth.
30・deviates from 1.30.

In addition, the outer molds 11 and 12 have surfaces of
1, so the tire piece j30・], :i 0
remains in the outer mold], 1.12, so the outer mold 1.1.
Tire J4'L: 3t efficiently by crimping 12
')・i, 30 can be joined and molded into one piece. Sub-1'c According to the present invention, it is possible to save the great amount of labor and time required in the prior art.

(Example) The manufacturing method of 'l(H), which is an example of the present invention, will be explained in detail based on the aspects. First, a hydraulic press forming apparatus 1 for press forming wheels.
Reference numeral 72 is a machine frame constructed by fixing cylindrical frames 5 to the four corners of a pedestal 3 subnumbered on the floor and an upper plate 11. 6 has through holes 7 in the four corners...
The hair is 1. It is a lower moving frame body, and the cylindrical frame is 5.
. . . is attached so as to pass through the through hole 7 . 8 is a hydraulic device that moves the vertically movable frame 6 along the cylinder) 1/-m 5... -1-down II::'j -C2 The oil IE piston 90L section moves the vertically movable frame (5 310.10 is fixed on the upper surface of 1-lower moving frame 6, and is fixed on the upper surface of the lower moving frame 6. 12 is an upper mold for forming a wheel, and a hole (1') is placed on the 1: side of the frame 4 in the 1'- section. - It is fixedly installed at.

1, 3 a ・l : 3 b temperature is 140~200''
Water fish S (lower mold 1) with a pressure of 12 kg/1 flJ at 'C
and 1- is a bendable pipe that is supplied to the inside of the mold 12, and the do-shape 'J1 and the L-shape part 2 are: - The temperature of r is 71: The temperature at which the rubber is vulcanized between short j1.9 is 140- 414, which is kept at 200°C, is the floor 10 on the do side of the left and right rails 10-10.
Item 7 - In the installed temperature control 1&, internal air flow detection: An electric heater 15 and a cooling device "i16" which are activated by the detection of the temperature sensor are installed, and the internal 711J
t is always 70' x knee 11. , maintained at 0°C.

17.17 is installed between the inside and outside of temperature controlled warehouse 1/1.
A moving platform 19 having a grip portion 18 is placed on the upper portion of the rail so as to be movable along the rail. Then, with the core mold 20 placed R on the upper surface of the moving table L9, the operator holds the grip part 18 and moves the moving table ]-9 along the left and right 1/...-rules 17 and 1.7. Move it! The core mold 20 is stored (af) together with the movable table 19 in the am storage 14 from the person D 21 of the temperature control storage 14. This is a lid body (door) that opens and closes for person 1-1.

However, the temperature control jlIJ14 houses the core mold 2 () inside thereof, and by the action of the electric heater 15 and the cooling device j6, the raw rubber is molded at a rate of i+7. 23 is a bendable vibrator 24 which is also configured to adjust the temperature of the core mold 20 to 70"C-ILO ℃, which does not vulcanize in a short time.
Tip of 1. With this installed nozzle, the temperature from its tip is 140-200℃ and the pressure is 12ftH/cy&
It is constructed so that 4.0 liters of water vapor can be spewed out. Incidentally, a valve 24' is provided at the base of the via f24; ;ψ2. The structure is such that the pipe 24 can be switched between a state where water vapor is ejected from the tip of the nozzle 23 and a state where the water vapor is blocked and the inside of the pipe 24 is opened.

Here, the lower mold 11 will be explained in detail.

The lower mold 11 is constructed by fixing the base part 11-4 and the mold part 11b) with bolts L, 1o, . . . .

25 is a mold carved into the upper surface of the mold part tib, which includes a part 2G for molding the tire body 101 of the center shaft 100, a part 27 for molding the lug 02, and a spoke covering part 103. 2), ε (the outer shape of a special rubber tire is carved into it, and the surface is rough and rough).

29 is the hole 105 of the boss J04 of 100, which is an import of 11 described later.
This is a support pin that slides through the base portion 11a, and is fixed at the center of the first plane of the base portion 11a. 3Q is a spoke support part 2 that does not support the spoke 106 of the axle no. 00, which will be described later, and is
]-b are provided at three locations on the four sides. However, at the gear holding bottle 29 and the three spoke support parts 30...
The rim 107 of the axle 100 is at the predetermined position nlJ of the mold part 25
(The structure is defined as 1./'' [5. 1' in the center of the λ bow support part 30.

A movable moving member holder 30a is provided below, and is biased in the upward movement direction by a lever 30b.

31... is the part 2 of the mold part 11b that molds the lug 102
Penetration as a suction part perforated at the bottom of 7/1. It is.

32 is a through hole drilled across the upper surface and side surface of the platform 11a and the pass-8, and a pipe 33 is provided on the side surface of the platform 11a. 1 of the base portion 11a by passing through the openings of the through holes 31-... and 32.
It is carved on one side and arranged in a harmonious manner. Therefore, the pipe 33 is connected to a vacuum pump to create a vacuum between the seals 34 and 34, and when raw rubber is placed on the mold 25 and press-molded, the through holes 31 are subjected to negative pressure to form the lug 102. 835, which allows the rubber to spread to the bottom corner of the mold 27, is a hole made iQU on the outer periphery of the mold 25,
When raw rubber is placed on the mold 25 and molded, the rubber is provided so as to spread to the outer peripheral corner of the mold 41.

50... are thin pins provided on the bottom surface of the mold 25, which prevent the raw rubber from getting stuck and shifting when the raw rubber is placed on the mold 25.

Reference numeral 36 denotes a hole provided inside the platform i1a, and a bendable pipe 13/l for supplying water vapor at a temperature of 140 to 200°C and a pressure of 12 kIC/- is connected to the hole entrance 3.
(The pipe 13a' is connected to the hole 36, and the water vapor is introduced into the hole 36, and the pipe 13a' is bendable from the hole outlet 36b.
The lower mold 11 is kept at a temperature of 140=200° C. to vulcanize the raw rubber.

37a... are holes provided at the four corners of the lower mold] 1,
"-type 12 &: Positioning fitting pin 3 provided as described below
．． 8... is provided so as to fit therein. j)7b
... is a through hole provided in the lower die 11, into which a positioning fitting pin 43... provided in the core die 20, which will be described later, is fitted.

39 has a temperature of 40 to 200℃ and a pressure of 40 to 200℃ from the tip.
- This is a stand on which the nozzle 23 that spouts 2 kg/cd of water vapor is set, and the cylindrical part 23a of the nozzle 23 is mounted on the - side.
A vertical groove 39a into which the crocodile part 23btr of the nozzle 23 is fitted, a horizontal groove 39b into which the ejection pipe 23o of the nozzle 23 is fitted are provided. 40 is a groove in which the ejection pipe 23e of the nozzle 23 provided on the upper surface of the mold part 1.1b is fitted.

Next, type 1 12 will be explained in detail.

"1 type 12 connects the base part 12,1 and the mold part 12b with the bolt 1.
2c... is configured to be fixed.

25' is a mold carved into the do surface of the mold part 12b,
A portion 26' for forming the tire body 101 of 1.1LOo, which will be described later, a portion 27' for forming the lug 102, a portion 28' for forming the spoke covering portion 103, etc. are carved, and the surface thereof is a rough and rough surface. is formed.

41 is a hole into which the tip of the support bottle 29 is inserted;
It is provided at the center of the lower surface of the base part 1.2a.

Reference numerals 31', . . . are through-holes, which serve as suction parts, bored in the bottom of the portion 27' of the mold part 121) for molding the lug 102. Reference numeral 32' denotes a through hole bored across the top and side surfaces of the base portion 12a, and a pipe 33' is provided in the side portion thereof. 34' and 34' are seals, which sandwich the openings between the through holes 31' and 32' and seal the base part 1.
．． There are harmonious steps carved into the underside of 2a. Thus, the pipe 33' is connected to a vacuum pump and the seal 34'
- Create a vacuum between 34' and apply negative pressure to the through holes 3]' when putting raw rubber into the mold 25' and press-molding, so that the rubber spreads all the way to the bottom corner of the part 27' where the lug 102 is to be molded. It looks like this.

35' is a hole provided on the outer periphery of the mold 41, and
A raw rubber shim is provided at 5' so that when press molding, the rubber spreads all the way to the outer corner of the J shape.

Reference numeral 36' denotes a hole provided inside the platform 12a, and the bendable pipe 1:1b for supplying water and fish food at a temperature of 140 to 200°C and a pressure of 1°2 kg/cd is connected to the hole entrance 36a'. The water is introduced into the hole 36' and discharged through the bendable pipe 13b' from the hole outlet 36b', and the temperature of the upper mold 12 vulcanizes the raw rubber. The temperature is maintained at 140-200°C.

38 are fitting pins provided at the four corners of the upper mold 12, and through holes 42 and 38 provided at the four corners of the core mold 20, which will be described later.
... and is provided so as to fit into the hole 37a of the lower die 11.

Reference numeral 39' denotes a presser stand provided opposite to the stand 39 that connects the nozzle 23 to the cellar 1. 6? ), Noz 71. z 2.3
It is held by a stand 39 and a presser stand 39' during molding, and the tip of the ejection pipe 23f) protrudes into the space formed by the mold 2.5 and the back of the mold 23, and is at a position H1''.

Reference numeral 30' denotes a spoke support part that supports the spoke rib 106 in cooperation with the spoke support part 30 of the lower mold part 1; There are three locations on the bottom surface of b. In addition, in the center part of the spoke support part 30', there is an s# that can be freely moved downward.
A support member 30a' is provided and biased in the direction of movement by a spring 30b'.

Next, to explain about the core mold 20, on the 1-plane of e and the lower m1, there is a tire 1iij of a car @ 100, which will be described later.
Hollow part 108 of part 101, part 45 to be molded, and lower mold]
, 1 and the parts 27 and 27 of the upper die 12 that form the lugs 102.
When press-molding the rubber into the bottom corners, the protrusion 46 pushes the rubber into the bottom corners 27 and 27'.
The lug 102 that is pressed by the protrusion 46...
-Internal cavity section] 08#... is formed by 4 in communication with the hollow section 108. ) and rim 1 of tun 1 JQioo
The part 47 (part l
If the maximum diameter of the cavity 123 is 1.1, the diameter of the cavity 123 is also 11. However, the radius 1.1 of the cavity 1230 is set to be smaller than the radius 1.2J of the rim 1.07 (7), and the cavity 1 (IJ1 part) into which the spoke 106 of weight w4100 is inserted. Part 48 to be molded and 5 lower mold J]
, two half-split tire pieces formed by the mold 12: 30. The joining margin where the outer and inner peripheries of the ball 0 are joined:, ・An annular groove forming I42. Part (30, G1 and molds 44 and 44 are carved. And mold 44
・The surface of 440 is subjected to silicone baking treatment (or fluorine: -te, inge treatment) so that the rubber can be easily removed after molding.

51... are thin pins provided on the l-face of the mold 44 to prevent the raw rubber from getting stuck and shifting when the raw rubber is placed on the mold 44.

42... are through holes through which the fitting pins 38... of the upper die 12 pass, and 4:3... are the through holes of the do mold 1-1. At the position where it fits into the i through hole 37b... provided in the bottom 8, at the t+) 549/49, remove the core mold 20 from the lower mold 11 and hang it. Lift 1 - These are the left and right hanging parts on which the wires, etc. of the device are hung.

Next, the raw rubber is vulcanized at a temperature of 140 to 20°C for a short time.
Using a hydraulic press molding device 1, which has a lower mold 11 and a lower mold 12 heated to 0°C and a core mold 20 whose temperature is controlled to 70 to 110°C, which can mold raw rubber and not vulcanize in a short time. , *, Next, a method for forming the ring 100 will be explained.

First, the iron cylinder boss 1 for attaching the axle to the axle.
04 and an annular rim 107 made of an iron pipe are quickly welded to spokes 10G made of three iron vibrators. A wheel body 110 is prepared. Incidentally, the boss 104 and the spokes 106 . . . are reinforced and connected by a reinforcing iron plate j09.

Adhesive A for bonding rubber and adhesive B for bonding iron are applied to the entire wheel body 110, and after drying, adhesive A for bonding rubber is applied to the portions of the spokes 106 where the rubber is covered. It is applied to the annular rim 107. Next, apply rubber to the outer circumference of the similar rim 107 using a solvent. Apply the melted rubber with a trowel, then adhere a band-shaped natural raw rubber C with good adhesiveness to the trowel, and then apply the rubber dissolved in a solvent to the haircut.

Next K, lower mold 1.1. From the position facing the upper mold 12, move the left and right 1 mail IQ 1,0 [- in the mouth direction and position it at the tip of the left and right rail 10 1.0.
Front claw band-shaped raw rubber with city axis 100 lugs" 02/102
Temperature '70~] 10℃ that can mold raw rubber with cuts in accordance with the pitch between them and does not vulcanize in a short time.
The preheated product is placed on the mold 25 of the lower mold 11. At that time, cut [I is the part 27.2 where the lug 102 will be formed]
Place the raw rubber strip D in the middle of the bottle 50 &: so that the raw rubber is just above the 27... Take it out, align it so that the fitting pins 43 ... fit into the through holes 37 b ... of the lower mold IJ, and stack it on 1- of the lower mold 11.

Then, the band-shaped raw rubber D is also placed on the two-sided mold 441- of the core mold 20. At that time, place the band-shaped raw rubber f) on the lower mold 11! ! In the same way as for the case, cut the bottle 5 so that the cut II is located in the middle of the protrusions 46 and 4G that form the rubber 102, and the raw rubber is positioned exactly on the protrusions 46.
Secure the band-shaped raw rubber D with the hole.

Then, move the lower mold 11 with the core mold 20 stacked on it by moving the left and right rails 10 and 10-1- in the A direction to a position where it faces the -1- mold 12, and -1-; The fitting pins 38 pass through the through holes 42 of the core mold 20 and fit into the holes 37a of the upper mold 11.
The hydraulic device 8 is operated to move the vertically movable frame 6 by 1 until the core mold 20 and the lower mold 11 come into close contact with each other. Each type at that time! The press pressure of No. 111 is about 100 to 1201 w/i, and about 2 whole culms are formed. Then.

The band-shaped raw rubber Y) is press-molded using molds 25, 25', 44, and 44 to form the tire body 10f of the wheels J and 00,
A cavity 123 into which the lugs 102, spoke covering portions 103, and rim 107 are inserted is formed.

At this time, the lug 102... portion is pressed by the protrusion 4G... formed on the core mold 20, the lower mold]l and the portion 2'7 of the upper mold I2 that molds the lug 1.02.・27′・・
・Suction is carried out using a vacuum pump through the through hole 31 provided at the bottom of the . : By doing so, the rubber is sufficiently spread to the bottom corners of the lugs 102 of the stone mold 11 and the upper mold 12 to be molded, and the molding is done neatly.
Then, after the upper die 12 and the core die 20 are separated by moving the vertically movable frame 6 downward by the hydraulic device 8, the lower die 11 is moved to the left and right by one knot 10 and 10, while the core die 20 is stacked on top of each other. Move the top toward the opening and pull it out to the tips of the left and right rails 1-0 and 10, then use the lift device to separate the C middle F mold 20 from the lower mold 12, and return the core mold 20 to the temperature-controlled warehouse 14. Store it. At this time, the surfaces of the molds 44 and 44 of the core mold 20 are treated with silicone baking (or fluorine coating treatment) so that the rubber after molding can be easily separated, and the lower mold 11 and the upper mold] The surfaces of the molds 25 and 25' of No. 2 are roughened to prevent the rubber from swelling, so that the molded half-tire pieces 1, 30 and 130 are formed into a lower mold IJ and an upper mold, respectively. 12 and remains.

In this way, as shown in FIG.
0.130 is molded, but the lower mold 11 and the upper mold 1
The joint allowances E and El of each of the half-shaped tire pieces 130 and 130 protrude from the joint surface with 2 (the part formed by the annular groove parts 60 and 61 of the core mold 20), and Since the joining allowances E and -E are not yet vulcanized because the inside is molded with the mold 20, the halved tire pieces 13 are formed in the fifth step.
When 0.130 is joined together and vulcanized, it becomes one piece,
The two half-split tire pieces 130 are firmly adhered and molded. Moreover, the shape of this joint allowance E is formed in an inclined shape such that the protrusion amount d3 is small on the outer peripheral side (outer surface side) of the tire, and the protrusion amount ff1d is large on the inner side of the tire. That is, when joining the two half-shaped tire pieces 130 and 130 together, the outer circumferential side that is in contact with the upper mold 11 and the upper mold 12 and provides a shadow to the vulcanized outer surface is necessary for adhesion. The amount of protrusion with a small protrusion is achieved by not applying too much pressing force to the outer surface where vulcanization is progressing during bonding, to prevent wrinkles or lines from forming on the surface, and to prevent the lower mold 11 and the upper mold from forming. The unvulcanized inner side, which is not in contact with the mold 12, is made to protrude by a large amount so that the excess rubber is removed from the hollow part 108i during joining.
A raised portion 111 is formed to provide sufficient adhesive strength.

Next, the hole 105 of the boss 104 of the axle body 1]0, to which the band-shaped raw rubber C is adhered to the outer periphery of the annular rim 107, is inserted into the support bin 29 of the lower mold [1], and the spoke support part 30...
The spokes 106 are supported by the rim 107 of the wheel body 110, and the halved tire pieces 130, 130 of the lower die 11 are supported by the spokes 106.
The rim i07 is placed in the cavity 123.

Then, move the lower die 11 again on the left and right rails 10, 10 in the A direction to a position where it faces the upper die 12, and place the nozzle 2
3. Tire piece 130.1 whose tip end is halved
30 located in the hollow part 108, so that the lower mold], 1 F
139, and the upper molds 1 and 2 are bubbled so that the fitting pins 38... are fitted into the holes 37a of the lower mold 11, so that the upper mold 12 and the lower mold 11 are in close contact with each other. The hydraulic device 8 is operated to move the vertically movable frame 6 upward. The press pressure between the molds 11 and 12 at this time should be greater than the pressure of 12 kg/J of the water vapor ejected from the tip of the nozzle 23, but in this embodiment it is set to about 100 to 120/d. The temperature is 140-200℃ and the pressure is 12k from the tip of the nozzle 23 by operating the valve 24' of the vibrator 24.
g/cffl of water vapor is ejected.

Then, the tire is heated by the lower mold 11 and the upper mold 12 (temperature 140
200℃) from the outside, and the nozzle 2
The tire pieces 130 and 130 into which the rim] and 07 are placed are vulcanized from the inside with steam at 140 to 200°C ejected from 3, and the entire tire is vulcanized in 5 to 1.0 minutes.
Since the surfaces 123' and 123' of the hollow parts 123 and 123 have been molded in the core mold 20, they have not yet been substantially vulcanized, so that they are properly bonded to the rim 107. Furthermore,
Cavity part of tire piece 130, 130 where rim 107 is inserted],
Since the radius of 23 is smaller than the radius of the rim 107, the rubber is pressed by the rim 1-07 during pressing, and the adhesion between the rim 107 and the tire piece 130. It is done. In addition, a part of the excess rubber pressed by the rim 107 bulges toward the hollow part 108 and comes into close contact with the band-shaped raw rubber C adhered to the rim 107, so that high-pressure water vapor is generated in the hollow part 08. This prevents the water vapor from entering between the rubber and the rim 107. Therefore, the adhesion between the rim 107 and the tire pieces 130 is very strong.

In addition, air that has entered the rubber of the tire piece 1; 30/130 (air enters the rubber when rolling it) and gas generated inside the rubber due to heat will be affected by the temperature applied during vulcanization. Since the expansion of the aquatic fish 4 (1) placed in the hollow part 108 is suppressed by the high pressure, a stable and uniform rubber structure is obtained and a high-quality tire is molded. At high pressure of water vapor, the above rim 1-
The rubber that swelled up inside the hollow part 108 after being pressed at step 07 and the band-shaped raw rubber C that was adhered to the rim 1.07 are removed from the rim 10.
7, and the rim 107 and the tires 4130 and 130 are bonded even more firmly.

In this way, from nozzle 2:3, 140-20O℃
After vulcanizing for 5 to 10 minutes by jetting out water vapor, the valve 24' is operated to stop the jetting of water vapor, and the water vapor in the hollow part 108 is released to the atmosphere, and is left as it is for about 1 minute. After setting the inside of the hollow part 108 to atmospheric pressure, the hydraulic device 8 moves the vertical moving frame 6 downward to separate the upper die 12 and the lower die 11, and after removing the nozzle 23, the lower die 11 is moved to the left and right rails. Move the top of 10 and 10 toward the mouth and pull it out to the tips of left and right rails 10 and 10, and remove it from the wheel ] 00 hairstyle 11.

Then, the hole 11.2 formed in the outer circumference of the tire by the ejection pipe 23G of the nozzle 23 is closed by press-fitting and gluing a cylindrical rubber [1:3] with a diameter larger than the diameter of the chain hole 1.12.
A portion 27 of the flat mold 11 and the upper mold 12 for forming the lugs 102.
Large through hole 31...31'... drilled in the bottom of 27'
・Lug created by extra rubber stuck inside during molding], 0
The cylindrical rubber parts 114 that protrude laterally from the base part 2 are cut and removed from their bases, and the holes 35 provided in the lower mold 11 and the upper mold 12 are filled with excess material during molding. The cylindrical rubber part 115 that protrudes laterally from the lug 102 that is fitted with rubber can be left as it is because the amount of protrusion is small, but if it adversely affects the performance of the wheel, it can be cut off from its base. and remove it.

In this way, an axle 100 as shown in FIGS. 17 to 19 is manufactured, and its tire holder 10 is
! Since the hollow part 108 is formed inside, when it is attached to a running vehicle body, it provides good cushioning and good running performance. Furthermore, even if the tire body 101 is punctured by a nail or the like and some holes are formed, there will be no problem because the inside of the hollow part 108 is already under human pressure, and the tire will not be able to run like a conventional high-pressure axle. You can continue driving without any problems. This is because the shape of the tires 11 and lugs 101 and 02 of the axle 100 manufactured as described above is such that even if there is a hollow part 108 inside, it supports the running vehicle body as if it were a solid tire. To be more specific, the part of the tire body 101 that is bonded to the rim 107 (the hollow part 10
The thickness t of 120 (lower part of 8) is 1-
The thickness of the side portion 12) is J [less than 1,', and the 1-side portion 121 of the hollow portion 108 is deformed due to the reaction force of the load of the traveling vehicle body received from the road surface. Wheels
It exhibits good cushioning properties of , 00, but it is less than necessary.
The deflection of the tire body 10 is prevented by a portion 120 of the thick tire body 10 which is bonded to the rim 107 (a portion on the side of the hollow portion 108). Therefore, the tire of the LTT wheel 100 exhibits good cushioning properties and can support the traveling vehicle body almost in the same way as a solid tire, despite having the hollow portion [08] inside.

Since a hollow portion 108' is provided that communicates with the base interior LJ-hollow portion 208 of the lug j02, the stress applied to the lug 102 is absorbed by the entire flexure of the base of the lug 102 due to the presence of the hollow portion 108I. Moreover, since the hollow part 108' is in communication with the hollow part 1.08, absorption is carried out in the hollow part 1.08, so that the base of the lug is less likely to crack and break. 108' and the hollow part 108 improve cushioning properties,
Good running performance as an AI axis.

Last number: ゛4, car M 100 boss 104 and spoke J
O (An annular groove formed on the side surface of the tire by coloring the reinforcing iron plate '3.09 with black paint of the same color as the rubber) 22... on the - side surface (traveling vehicle body) If you apply yellow or white paint only to the side surface (which is exposed to the outside when installing the product), the product value will increase as well.

When the rotational direction of the wheel 100 is specified by the shape of the lug 102 (almost all lug-equipped wheels for A-industry machinery have a rotational direction determined when mounted on the vehicle body.

), when it is attached to the vehicle body, a ring of 11 colors of paint is applied only to the side surface that slides outward to prevent mistakes in the direction of attachment to the vehicle body.

In addition, in the above-mentioned example, the method of manufacturing a rubber wheel using a press molding device was shown in which the present invention was implemented.
It goes without saying that the present invention may also be implemented in a method of manufacturing a rubber wheel using other molding equipment such as an injection molding equipment.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 17 is a side view of a hydraulic press molding device, Fig. 2 is a plan view of the lower die 11, and Fig. 3 is S in Fig. 2. -S, sectional view, FIG. 4 is a sectional view of S z S 2 in FIG. 24, FIG. 5 is a cross-sectional view of FIG. 6 is a sectional view of S,=S in FIG. 6, FIG. 8 is a sectional view of S, S4 in FIG. 6, and FIG. 9 is a plan view of the middle mold 20. Figure 10 shows 56-3 in Figure 9. , cross-sectional view, No. 11, Figure 9 is S@S, cross-sectional view, Figure 12 is S-8 of Figure 9,
, sectional view, Figure 13 is b @ -8g sectional view of Figure 9,
Figure 14 is a sectional view explaining the action during molding, Figure 175 is 41
S: A perspective view of the shaped raw rubber D, FIG. 16 is a side view of i4r to which raw rubber C is adhered, a side view of the shaft body J10, FIGS. 1 and 7 are a partially sectional side view of the molded wheel 100, and FIG. FIG. 17 is a plan view, and FIG. 19 is a sectional view taken from S to S in FIG. 17. Symbols in the figure: 1 is a hydraulic press molding 'J device, 11 is a lower mold, 12 is an upper mold, 20 is a core mold 523 is a nozzle, 31.3
1' is a through hole, 46 is a protrusion, 100 is a wheel, 101 is a tire body, 102 is a lug, 103 is a spoke covering part,
104 is the boss, 10G is the spoke, 107 is the rim, 10
8 is a hollow part, 12:3 is a hollow part, and 130 is a tire piece.

Claims (1)

[Claims] (1) Tire pieces 130 and 130 are molded using the outer molds 11 and 12 whose mold surfaces have been treated to have a rough surface and the core mold 20 whose mold surface has been treated to have a smooth surface that allows the rubber to easily separate.・Remove the core mold 20 while leaving 130 on the outer molds 11 and 12, press the outer molds 11 and 12, and make the tire piece 130.
・A method for manufacturing wheels in which 130 parts are joined and integrally formed.