KR920009951B1 - Method for joining a tread in an apparatus for making a tire - Google Patents

Abstract

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Description

Tread Laying Method in Tire Molding Machine

1 is a side view of a tread sticking device according to a first embodiment of the present invention.

2 is a plan view of FIG.

3 is a cross-sectional view taken along line B-B in FIG.

4 is a side view seen from the opposite side of FIG.

5 is a cross-sectional view taken along line A-A of FIG.

6 is an explanatory diagram of positioning and length measurement.

7 is an explanatory diagram of a tread centered fit.

8 is a state diagram just before the patch is opened.

9 is a state diagram immediately before the end of the patch.

10 shows the side shape of the tread.

11 is a sectional view of a tread sticking device according to a second embodiment of the present invention.

12 is a cross-sectional view taken along line C-C in FIG.

Figure 13 is a state where the extreme deformation of the rear part of the tread.

14 is a cross-sectional view taken along line D-D of FIG.

Fig. 15 is an explanatory diagram of the junction of the front and rear ends of the tread.

* Explanation of symbols for the main parts of the drawings

1,36: conveyor 6: press roller

14,15: sliding mechanism 25,28: optical switch

29,35: Pinger 48: Molding drum

The present invention relates to a method of attaching a tread cut into one applied to a tire molding machine.

The tread cut to the length of one tire must have a length not only due to cutting precision but also due to training conditions, storage time until extrusion and molding, and air temperature conditions.

(1) In the conventional tread sticking device, there is no effective length fixing function, and the worker is sticking while correcting the length.

(2) A method is proposed in which a tread cut into one tire length is wound on a forming drum by adjusting the driving speeds of the conveyor and the forming drum, and the front and rear ends of the tread are joined.

(1) As described above, the tread cut to the length of one tire may be caused by not only cutting accuracy but also kneading conditions, storage time until extrusion and molding, and air temperature conditions. The allowable range of the stagger is small, and the following problems occur when the operator corrects the length at the input.

(A) Length calibration work requires considerable skill.

(B) Significant heavy labour.

(C) Work efficiency is poor and unevenness occurs in the bonding state.

(2) A method of joining the tread cut to the length of one tire to the forming drum by adjusting the driving speed of the conveyor and the forming drum and joining the front and rear ends of the tread has the following problems.

As shown in FIG. 15, when the speeds of the conveyor and the forming drum are wound so that the center drums of the front and rear ends of the tread 57 coincide with each other, the gap between the tread and the E point of the tread depends on the material, training conditions, and shape of the tread. X1 and X2 may occur, and the operator needs to manually modify the rear end of the tread.

The present invention

(1) Measure the actual length of the tread before sticking.

(2) Adhere the tip of the tread to the drum in position.

(3) Secure the rear end of the tread to the conveyor. The drum and the conveyor are driven so that the front end and the rear end of the tread coincide with each other.

(4) Drum circumference length: Lmm, Dread actual length: 1mm, skip length: 2mm, drum speed: Vmm / sec, conveyor speed: Vmm / sec

Adjust the driving speed of the conveyor and the forming drum so that the front and rear ends of the tread are joined.

Further, in the present invention described above, after measuring the actual length of the tread, the front and rear ends of the tread are joined by using a device that grips both ends of the tread and tensions the rear end of the tread.

In the present invention, the action is

(1) Measure the actual length of the tread prior to sticking, glue the leading end of the tread to the mood on the drum, fix the rear end of the tread on the conveyor, and adjust the rotational speed V of the drum and the moving speed V of the conveyor as described above. Thus, the tread is wound around the drum while being stretched to the required length, and the front and rear ends of the tread are joined without creating a gap.

(2) Regarding winding the tread by the method of the above (1), while holding the trailing ends of the tread and winding the trailing end of the tread so that the gaps X1 and X2 are zero, FIG. Is corrected according to the material, kneading conditions, and shape of the tread, so that both ends of the tread are gathered without gaps.

[First Embodiment]

1 to 10, (1) is a conveyor frame, (2) (3) is a bracket at both ends of the conveyor frame, (4) is a plate slidable along the bracket (3), (5) is a plate ( 4) Tension screw installed in (4), (6) press roller, (7) pneumatic cylinder, (8) drive roller, (9) (10) (12) idle roller, (11) tension roller, 13 is the pivot center of the press roller 6, 14 is the plain bearing on the rail 15, 15 is the rail on the support frame 53, 16 is the upper end of the mount 24 Mounted bearing, 17 is a bracket at the end of the support frame 53, 18 is a wire winding motor, 19 is a conveyor drive motor, 20 is a screw for pushing up the end of the support frame 53, (21) is a bracket on the upper mount 23, (22) is equipped with mounts 23 and 24, the base 25 (28) is a reflective fluorescent switch, 26 is installed on the conveyor frame (1) Arm (27) is the arm installed on the bogie (50), (29) is the upper end of the spline shaft (33) Pingers installed on the block (30), a block having a bearing (31), (32) a pneumatic cylinder for elevating the block (30), (33) a spline shaft mounted on the bracket (34), (34) Is a bracket mounted on the cart 55, 35 is a pinger mounted on the block 30, 36 is a conveyor belt, 37 is a guide roller for guiding the conveyor belt 36, and 38 is a conveyor. Frame, plate of (1), (39) the square pipe of the conveyor frame (1), (40) the plain bearing of the bogie 55, (41) the pneumatic cylinder mounted on the support frame 53, ( 42 is a rail on the table 56, 43 is a nut fixed to the bogie 50, 44 is a screw to counter the nut 43, 45 is a motor for rotating the screw 43, 46 is the bearing of the screw 44, 47 is the bracket of the trolley 50, 48 is the forming drum, 49 is the stopper mounted on the trolley 55, and 50 and 55 the bogie , 51 is a wire connected to the cart 55, 52 is a pin for supporting the guide roller 37, 54 is a pressing roller Arm of (6), (56) is a label to be an extension of the support frame 53, (57) is a tread, (58) is a rail mounted on the conveyor frame (1), (59) is a trolley (50) Plain bearing.

The conveyor belt 36 divided into two with respect to the center line YY of the pasting device is driven by the idler rollers 11, 12, 10, 9 and the driving roller 8 as shown in FIG. It is wound in the form as indicated by. The drive roller 8 is connected with a motor 19 capable of controlling the speed and rotation amount of the servo motor or the like. In addition, the idler 11 is movable back and forth with respect to the conveyor, it is possible to adjust the tension of the conveyor belt (36). At the end of the conveyor is a forming drum 48. Although the drawing is omitted, the drum 48 is also driven by a servo motor or the like. In the front part of the conveyor, a pressing roller 6 is rotatably supported by the arm 54, and the arm 54 is supported by the side 13 to the conveyor frame 1 so as to be able to swing about the biaxial 13. It is. The arm 54 is supported by the pneumatic cylinder 7 attached to the conveyor frame 1.

A plain bearing 14 is mounted on the lower side of the conveyor frame 1, and a pneumatic cylinder mounted on the support frame 53 is slidably supported on the rail 15 fixed on the support frame 53. Although the rod of 41 is not shown in figure, it is connected to the conveyor frame 1, and drives a conveyor back and forth. The rear end of the support frame 53 is rotatably supported by the bearing 16, and the front end is supported by the screw 20 so that the height is adjustable. The bearing 16 is attached to the mount 24 fixed to the base 22, and the screw 20 is attached to the mount 23 fixed to the base 22 via the bracket 21.

The rail 58 is attached to the conveyor frame 1, and the trolley | bogie 55 is provided so that a run is possible through the plain bearing 40. As shown in FIG. The bracket 34 is fixed to the left and right of the trolley | bogie 55, and the spline side 33 is attached to this bracket 34. As shown in FIG. The pinger 29 is fixed to the upper end of the spline 33. In addition, a block 30 is provided on the spline shaft 33 so as to be slidable through a bearing 31, and a pinger 35 is attached to the block 30. As shown in FIG. The pneumatic cylinder 32 is fixed on the bracket 34, and the rod is connected to the block 30. In addition, the conveyor frame 1 is equipped with a moder 18. The shaft 51 is provided with an unillustrated or cylindrical winding drum, and the wire 51 having one end mounted on the trolley 55 by this winding drum. It is supposed to wind up.

A part of the support frame 53 is an extended table 56, and a rail 42 is attached to the table 56 so that the trolley 50 is movable through a bearing 59. have. An arm 27 is mounted on the trolley | bogie 50, and the reflective fluorescent switch 28 is attached to the front-end | tip of this arm 27. As shown in FIG. Moreover, the stopper 49 attached to the trolley | bogie 55 contacts the arm 27 on the return side of the trolley | bogie 55, and the stop position of the trolley | bogie 55 is restrict | limited.

In a part of the trolley | bogie 50, the bracket 47 is attached, and the nut 43 is further fixed to it. The nut 43 is located on the threaded rod 44, and the threaded rod 44 is attached to a positionable motor 45 such as a sub motor.

A square pipe 39 passes through the center of the conveyor, and plates 38 are fixed to the left and right sides of the pipe 39. The plate 38 is L-shaped, and the upper surface supports the central part of the conveyor belt 36. In addition, the plate 38 has a pin 52, and a plurality of guide rollers 37 are rotatably arranged in the conveyor longitudinal direction so as to be rotatable to the pin 52. This guide roller 37 has a V-shaped protrusion in the center as shown.

An arm 26 is fixed to the front of the support frame 53, and a reflective optical switch 25 is fixed to the tip of the arm 26.

The operator places the tread 57 on the conveyor as shown in FIG. 7 so that the groove in the center thereof coincides with the projection of the guide roller 37 for the widthwise positioning, and the conveyor moves forward and backward so that the tip of the tread 57 is the front switch 25. ) To stop. The rear switch 28 is driven by the motor 45 to detect the rear end of the tread 57, and at the same time measure the actual length of the tread.

When the positioning of the tread 57 and the measurement of the actual length are completed in this manner, the pinger 35 is driven by the pneumatic cylinder 32, so that the tread 57 is moved together with the pinger 29 together with the conveyor belt 36. Hold on tightly The positions of the optical switch 28 and the pingers 29 and 35 are kept constant by the contact of the stopper 49 with the switch arm 27 of the stopper 49 in which the position of the pingers is mounted on the car 55.

In this state, the conveyor advances by the action of the pneumatic cylinder 41, and stops so that the pressure roller 6 is directly under the drum 48.

Then, the press roller 6 presses the tread 57 to the drum 48, and then starts the drum 48 and the conveyor 36 simultaneously, and affixes it. At this time, the speed of the conveyor 36 with respect to the rotational speed of the drum 48 is fixed so that the rear end part of the tread 57 may match the sticking position of the front end part based on the following calculation formula.

Drum circumference length Lmm, actual length of tread: 1mm, skip length: 2mm (Fig. 10), when the drum rotation speed is Vmm / sec, the conveying speed of the conveyor Vmm / sec,

It becomes

The pingers 29 and 35 retreat while being released immediately before the end of one rotation, that is, being pinched at the position shown in FIG. 9 and winding the wire 51 by the motor 18.

In addition, although the belt conveyor was used in the Example, it is also possible to use a roller conveyor of a circulating type | mold. In this case, the guide roller of the position fixing in the center is abolished, and a guide projection is formed in the conveyor roller. In this case, it is also possible to drive the pinger's bogie with a screw or the like and follow the roller conveyor without using the roller.

Second Embodiment

11 to 14, reference numeral 1 denotes a conveyor frame, 29 denotes a pinger, 36 denotes a conveyor belt, 37 denotes a guide roller for guiding the conveyor belt 36, and 38 denotes a conveyor. Plate of frame 1, 39 is a square pipe of conveyor frame 1, 40 is plain bearing of trolley 55, 57 is tread, 58 is installed on conveyor frame 1 It is a rail and the following members are the same as that of 1st Example.

Reference numeral 101 is a bracket mounted on the bogie 55, 102 is a rail mounted on the bracket 101, 114 is a stopper bolt mounted on the bracket 101, and 103 is a plane of the bogie 104. Bearing, 105 is a rail mounted on the bogie 104, 106 is a plain bearing mounted on the bogie 107, 108 is a pneumatic cylinder mounted on the bogie 107, 115 is a bogie 104 Stopper bolt (113) is a pneumatic cylinder mounted on the bracket 101, 112 is a pneumatic cylinder mounted on the bogie 104, 109 is a clamp mounted on the bogie 107, (111) ) Is a pin mounted to the clamp 109, 110 is a pinger rotatable about the pin (111). The members 101 to 115 are arranged symmetrically in the center of the conveyor frame 1.

Next, the operation of the apparatus will be described.

After measuring the actual length of the trade 57, holding the tread 57 with the tongs 29, the clamp 109 and the pinger 110 driven by the pneumatic cylinder 112 moves toward the center of the conveyor, The pinger 110 rotated about the pin 111 by the cylinder 108 grips both ends of the tread. The amount of movement of the clamp 109 and the pinger 110 in the center direction is adjusted by the stopper 115. In this state, the clamp 109 and the pinger 110 are moved by the pneumatic cylinder 113 to extend the tread between the forceps 29 and the pinger 110. The amount of elongation of the tread 57 is adjusted by regulating the amount of movement of the trolley 104 based on the stopper bolt 114. The clamp 109 and the pinger 110 release the tightness of the tread 57 just before completion | finish of one rotation similarly to the pinger 29 and 35. FIG.

In this way, the end of the tread 57 is corrected according to the material, kneading conditions, shape, etc. of the tread, and the front and rear ends of the tread can be securely joined.

The tread attaching method in the tire molding machine according to the present invention,

(1) Measure the actual length of the tread prior to sticking, attach the leading end of the tread to a predetermined position on the forming drum, fix the rear end of the tread to the conveyor, and the drum circumference length: Lmm, the actual length of the tread: 1mm, skip length: 2mm, Drum rotation speed: Vmm / sec, Conveyor speed: Vmm / sec

By adjusting the drive speed of the conveyor and the forming drum so that the front and rear ends of the tread are joined, the tread of the forming drum is attached automatically, so that a reliable tread joint can be obtained with uniform quality.

In addition, the worker is not required to stretch or join the tread.

(2) After measuring the actual length of the tread prior to sticking, squeeze both ends of the tread and join the front and rear ends of the tread using a device that tensions the rear end of the tread, in accordance with the material, training conditions, and shape of the tread. The end of the tread can be corrected before winding.

Therefore, the manual labor of the worker can be reduced or eliminated.

Claims (2)

Measure the actual length of the tread before sticking, attach the tip of the tread to a predetermined position on the forming drum, fix the rear end of the tread to the conveyor, and the drum circumference length: Lmm, the actual length of the tread: 1mm, skip length: 2mm, drum rotation speed: Vmm / sec, conveyor speed: Vmm / sec, 12. A tread sticking method for a tire forming machine, wherein the driving speeds of the conveyor and the forming drum are adjusted so as to join the front and rear ends of the tread. A method for attaching a tread to a tire molding machine characterized by joining the front and rear ends of the tread by measuring the actual length of the tread prior to sticking, and holding both ends of the tread and extending the rear end of the tread.