KR20100034779A - A tread supply apparatus of tire builder - Google Patents

Abstract

PURPOSE: A thread supply apparatus of a tire molder is provided to reinforce an adhesive force of a cross section of the tread before attaching the tread to a molding drum by uniformly heating the leading end and the rear end of the cross section of the tread which is transferred towards the molding drum. CONSTITUTION: A thread supply apparatus of a tire molder comprises: a conveyor(10) which horizontally transfers a tread(T) towards a molding drum; a first and a second heating units(20) including a hot plate(22) which is connected to a fixing plate(21) and which height is controlled using a height control member(26); and a heating lamp(23) which is fixed to the lower part of the hot plate; and a transfer unit(40). The transfer unit includes: a LM guide(41) moving in a straight line; and a cylinder(46) in which a rod end is hinge-coupled with one side of the fixing plate of the second heating unit and which circulates the fixing plate of the second heating unit.

Description

Tread Supply Apparatus of Tire Forming Machine

The present invention relates to a tread supply apparatus of a tire molding machine, and more particularly, by supplying uniform heat to the cutting surface of the tread before attaching the semi-finished tread to the forming drum in the tire forming process to activate the adhesive property of the tread cutting surface. The present invention relates to a tread supply device for a tire forming machine which can improve the work quality as well as the tire quality by preventing the phenomena of the joints during the tread joint work.

In general, a tire is completed through a series of processes, namely, a refining process, an extrusion process, a rolling process, a bead process, a cutting process, a pocket process, a molding process, and a vulcanization process.

Here, the molding process is a process of manufacturing the green tires before the vulcanization process, through the primary molding process of assembling the semi-finished products such as inner liner, carcass, bead, sidewall, etc. to make the primary green tire, and the primary molding process It is divided into secondary molding process to make semi-finished products of belt, cap ply and tread on the carcass layer of the manufactured primary green tire to make secondary green tire in the shape of finished product.

In the secondary molding process, the belt is first attached to the upper end of the forming drum, and then the cap ply is attached at regular intervals based on the end of the belt. After attaching while transporting, the joint is finally connected to the front and rear ends of the cut surface of the tread.

In general, in the tread joint work, a natural rubber-based and styrene-butadiene rubber-based cement is applied to the cut surface in the previous step in order to reinforce the joint portion of the cut surface of the tread, and the cut surfaces are joined by hand.

However, when the semi-finished tread is transferred along the conveyor of the tread feeder toward the forming drum, the cement applied to the cutting surface of the tread is naturally cured after a certain time and the adhesive strength is lowered. In the case of compound rubber, even when cement is applied, there is a problem that the joint is weakened and opened according to the standing time during the joint operation.

Therefore, in the past, the crimping work that strongly crimped the joints had to be carried out. This crimping work is difficult to automate, so that manual work is performed by hand rollers, etc., resulting in deterioration of work efficiency and completion due to uneven work. There was a problem that adversely affects the quality of the tire, and even when such a pressing operation, there was a limit in applying a new compound because the adhesive force of the cut surface was not maintained.

Accordingly, there has been a desire for means to enhance the adhesion of the cut portions of the tread prior to attaching the tread to the forming drum of the tire forming machine.

The present invention has been made to solve the above-mentioned conventional problems, by supplying uniform heat to the cutting surface of the tread before attaching the semi-finished tread to the forming drum in the molding process of the tire, thereby activating the adhesive property of the tread cutting surface, It aims to improve the work efficiency as well as to improve the tire quality by preventing the phenomenon of splicing at the joint during the joint work.

In order to achieve the above object, the present invention provides a tread supply device for supplying a tread to the forming drum of the tire molding machine,

A conveyor for transporting the tread, which is a semi-finished product cut into a predetermined length, to a molding drum;

In order to uniformly heat the front end and the rear end of the tread cut surface when the tread conveyed along the conveyor reaches a position just before attachment to the forming drum, respectively between the front end of the conveyor and between the front end and the rear end of the conveyor. First and second heating means installed on the fixing plate, the heating plate being connected to the lower portion of the fixing plate at predetermined intervals, the upper and lower heights being adjusted by the height adjusting member, and a heating lamp fixed to the lower portion of the heating plate; And

An LM guide having a linear motion to switch the second heating means to a standby position which is a non-heating position of the rear end of the tread or an operating position which is a heating position of the rear end of the tread, and a body connected to a block of the LM guide, Moving means including a cylinder hinged to one side of the fixed plate of the second heating means to rotate the fixed plate of the second heating means according to the contraction or expansion of the rod;

Characterized in that it comprises a.

In addition, in the present invention, the height adjustment member, a pair of guide rods and one pair of guide rods installed so that one end is fixed to the fixed plate and the other end is slid up and down by a predetermined length through the sleeve attached to the heating plate, It is characterized in that it comprises a height adjustment screw coupled to the height-adjustment bundle that is installed in the spiral and coupled to the outer diameter in a spiral direction.

In addition, in the present invention, when the front end and the rear end of the tread conveyed along the conveyor reaches a heating position, a position sensor for detecting the respective position;

A temperature sensor for measuring a temperature of the heating lamp;

A control unit for controlling the conveyor, first and second heating means, moving means, position sensor and temperature sensor;

It characterized in that it further comprises.

Further, in the present invention, the standby position is a position parallel to the tread transfer direction in accordance with the contraction of the rod of the cylinder, the operating position is a position perpendicular to the transfer direction of the tread in accordance with the expansion of the rod of the cylinder. It features.

In the present invention, the heating plate is provided with a transparent glass plate surrounding the entire heating lamp.

In addition, in the present invention, the first heating means is vertically installed in the lower portion of the front end of the conveyor along the width direction of the conveyor, the second heating means is the upper portion between the front end and the lower end of the conveyor Characterized in that it is installed vertically downward along the longitudinal direction of the.

In addition, in the present invention, the block is connected to the body of the cylinder by a connecting bracket, one end of the connecting arm is hinged to the rod end of the cylinder, the other end of the connecting arm is one side of the fixing plate of the heating means It is characterized in that it is installed 90 ° rotatable to the hinge axis fixed through the hinge bracket on.

In the present invention, the heating lamp is characterized in that the halogen lamp.

According to the present invention, by applying uniform heat to both the front end and the rear end of the cutting surface of the tread conveyed toward the forming drum through the conveyor of the tread feeder, the adhesive property of the tread cutting surface is activated before attaching the tread to the forming drum. It is possible to reinforce, thereby preventing the spreading of the joint at the time of the tread joint work can improve the work efficiency as well as improve the quality of the tire.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

1 is a schematic overall plan view of a tread supply apparatus of a tire molding machine according to the present invention, FIG. 2 is a schematic partial side view of a tread supply apparatus of a tire molding machine according to the present invention, and FIG. 3 is a view of a tire molding machine according to the present invention. 3 is a schematic plan view of the tread supply device, in which FIG. 3A shows a state in which the second heating means is in the standby position, and FIG. 3B shows a state in which the second heating means is in the operating position.

As shown in the figure, the tread supply device of the tire molding machine according to the present invention, the transport means 10 for mounting the tread (T), which is a semi-finished product cut to a predetermined length and horizontally transported toward the forming drum (D), A structure comprising heating means for uniformly heating the front and rear ends of the tread cut surface when the tread (T) conveyed along the means (10) has reached a position immediately before attachment to the forming drum (D). Consists of

The conveying means 10 is, for example, a conveyor in which a plurality of conveying rollers 11 are installed in a horizontal direction at regular intervals between the frames F of both sides.

As shown in FIG. 1, the heating means includes a first heating means 20 and a second heating means 30 which are installed to be disposed at positions of the front end and the rear end of the tread T, respectively. The first heating means 20 installed at the front end portion of the tread T is vertically installed on a separate frame (not shown) to face the lower surface of the front end portion of the tread T at the lower end of the transfer means. , The second heating means 30 which is installed at the rear end position of the tread T is vertically installed in the upper portion between the front end and the rear end of the transfer means 10. That is, the first heating means 20 is installed at the lower end of the transfer means 10 in the width direction of the transfer means 10, while the second heating stage 30 is disposed above the transfer means 10. It is provided in the longitudinal direction of the conveying means 10. As such, since the first heating means 20 and the second heating means 30 are formed in the same structure only in their installation positions and directions, only the second heating means 30 will be described below for convenience of description. Let's explain.

As can be clearly seen from Figure 2, the second heating means 30 is fixed to the fixed plate 21 having a predetermined length and thickness, the fixed plate 21 is installed at a fixed interval at a lower portion by a height adjusting member It consists of a structure including a heating plate 22 that is adjusted up and down height, and a plurality of heating lamps 23 provided at a predetermined interval in the lower portion of the heating plate 22.

The height adjusting member is installed so that one end is fixed to the fixing plate 21 and the other end is slid up and down by a predetermined length so as to elevate the heating plate 22 in the up and down direction and the other end passes through the sleeve 24 attached to the heating plate 22. Between the pair of guide rods 25 and the pair of guide rods 25 and the height adjustment screw (27) coupled to the height-adjustment bundle (26) is moved in the rotational direction by the helical coupling to the outer diameter consist of.

Since the heating plate 22 having the heating lamp 23 rotates the height adjusting bundle 26, the height adjusting screw 27 is screwed to move up and down from the fixed plate 21 by a predetermined distance. An optimal position for applying heat to the front end or the rear end of the tread T can be set. The height adjustment screw 27 may be set by the operator in advance by properly rotating the height adjustment bunch 26, it may be equipped with a separate motor for automatic control.

The heating plate 22 is provided with a transparent glass plate 28 which surrounds the entire circumference of the heating lamp 23 so that heat emitted from the heating lamp 23 does not escape to the surroundings. Although the halogen lamp is used as the heating lamp 23 in this invention, it is not necessarily limited to this, An infrared lamp etc. can also be used.

On the other hand, the moving means 40 described below is connected to the second heating means. This moving means 40 is provided only in the said 2nd heating means 30, and is not provided in the said 1st heating means 20. As shown in FIG. The reason why the moving means 40 is provided only in the second heating means 30 is that the second heating means 30 is cut in the tread T in consideration of the change in the length of the tread T as described below. This is so that it can be arrange | positioned suitably to the rear end position of.

The moving means 40 is the length of the tread (T) to be transported along the transfer means 10 on the frame (F) fixed to the floor (B) near the place where the transfer means 10 is installed. Considering the LM guide 41 is installed in a direction parallel to the conveying means 10 to perform a linear movement along the length of the tread (T), and the second heating means 30 while linearly moving along the LM guide 41 It consists of a structure including a cylinder 46 is connected between the LM guide 41 and the second heating means 30 to move to the standby position or the operating position.

Although the LM guide 41 is not clearly shown in the drawings, the X-axis is mounted on the pair of rails 42 and the pair of rails 42 fixedly mounted to the frame F, as in a conventional structure. It consists of a block 43 installed to slide in a direction, and a screw shaft 44 penetrating the block 43 in parallel with the pair of rails 42. A servo motor is connected to one side of the screw shaft 44, and the screw shaft 44 is rotated by the rotation of the servo motor, and the block 43 is a rail (according to the rotation of the screw shaft 44). 42) Move up.

The block 43 is connected to the body of the cylinder 46 by a connecting bracket 45, one end of the connecting arm 47 is hinged to the rod end of the cylinder 46, the connecting arm 47 The other end of the) is rotatably installed at 90 ° to the hinge shaft 49 fixed through the hinge bracket 48 on one side of the fixing plate 21 of the heating means.

According to this structure, when the cutting surface of the tread T conveyed along the conveying means 10 is not in the position to be heated or passes through the position to be heated, the rod of the cylinder 46 is shown in FIG. 3A. By pulling (by contracting) the second heating means 30 is in a position parallel to the tread T in the conveying direction or in a position parallel to the moving means 40, i. When the cut surface of the tread T conveyed along 10) is in the position to be heated, the second heating means 30 is conveyed by pushing (expanding) the rod of the cylinder 46 as shown in FIG. 3B. It is in a position perpendicular to the tread T in the direction (position disposed just above the rear end of the tread cutting plane), that is, in the operating position.

In the apparatus according to the present invention, when the tread (T) conveyed through the conveying means (10) has reached a position just before attachment to the forming drum (D), that is, the front end of the tread (T) cutting surface is conveyed ( When reaching the front end of 10) and in the position for heating the front end and the rear end, a position sensor as a sensing means for sensing the respective position may be provided at the lower part of the transfer means 10, respectively.

In addition, by installing a temperature sensor for measuring the temperature of the heating lamp 23, when the temperature of the heating lamp 23 is set to the reference temperature in advance, when the reference temperature is reached, the electricity supply is stopped and the tread ( T) Overheating to the cut surface can be prevented in advance.

The transfer means 10, the heating means, the moving means 40, the sensor, and the like can be collectively controlled by a controller (for example, a PLC control device).

Referring to the operation of the tread supply device of the tire molding machine according to the present invention having such a configuration as follows.

First, while transferring the tread T cut to a predetermined length toward the forming drum D of the tire molding machine through the conveying means 10, the front end and the rear end of the conveyed tread T reach a position to be heated, respectively. When it is detected by the position sensor, the moving means 40 is operated in accordance with the detection signal. Accordingly, when the block 43 provided in the LM guide 41 stops at a proper position while linearly moving along the rail 42, the cylinder 46 connected to the block 43 is operated at that time. Thereafter, the fixing plate 21 of the second heating means 30 hinged to the rod of the cylinder 46 is rotated 90 ° about the hinge axis 49 by the tension of the rod of the cylinder 46 to fix the plate 21. The heating plate 22 connected to the lower portion of the tread (T) is positioned toward the rear end upper surface. At the same time, while the first heating means 20 is also operated together, the heating plate 22 of the first heating means 20 is positioned toward the lower surface of the front end of the tread T cut surface. Here, the height of each heating plate 22 of the first and second heating means 20, 30 can be adjusted by manual or automatic.

In this state, the heating lamps 23 provided inside each of the heating plates 22 emit light simultaneously at the front end and the rear end of the tread T cut surface. In this case, since the light emitted from the heating lamp 23 contains high heat, the cement applied to the cut surface of the tread T is uniformly heated. Accordingly, the adhesive property of the cement is activated so that the cement maintains its original adhesive strength, and thus the cement applied to the cut surface of the tread T naturally hardens before attaching the tread T to the forming drum D, thereby weakening the adhesive force. Since it can be suppressed as much as possible, it is possible to prevent the phenomena of the joints during the tread joint work after being attached to the forming drum, thereby significantly improving the work quality as well as tire quality.

Although the present invention has been described with respect to the preferred embodiment, the present invention is not limited thereto, and those skilled in the art will be able to variously modify and apply the same within the scope of the present invention.

1 is a schematic overall view of a tread supply apparatus of a tire molding machine according to the present invention.

Floor plan.

2 is a schematic partial front view of a tread supply apparatus of a tire molding machine according to the present invention.

Figure 3 shows a schematic plan view of a part of the tread supply apparatus of the tire molding machine according to the present invention, Figure 3a is a state in which the second heating means is in the standby position, Figure 3b is a state in which the second heating means is in the operating position The figure which shows.

Description of the Related Art

10: transfer means

20: first heating means

21: fixed plate

22: heating plate

23: heating lamp

25: guide rod

26: height adjustment bunch

27: height adjustment screw

28: glass plate

30: second heating means

40: means of transportation

41: LM Guide

43: block

46: cylinder

48: hinge axis

Claims (8)

In the tread supply device for supplying a tread (T) to the forming drum (D) of the tire molding machine, Conveyor 10 for horizontally transported toward the forming drum (D) by seating the tread (T) is a semi-finished product cut into a predetermined length; The front end of the conveyor, in order to uniformly heat the front end and the rear end of the tread (T) cutting surface when the tread (T) conveyed along the conveyor (10) has reached a position just before attachment to the forming drum (D) The heating plate 22 which is installed in the vicinity and between the front end and the rear end of the conveyor, respectively, is fixedly connected to the fixed plate 21 and the lower portion of the fixed plate 21 at a predetermined interval by the height adjusting member. And first and second heating means 20 and 30 including a heating lamp 23 fixed to the lower portion of the heating plate 22; And An LM guide 41 for linearly moving the second heating means 30 to a standby position which is a non-heating position of the rear end of the tread T or an operating position which is a heating position of the rear end of the tread T; The body is connected to the block 43 of the LM guide 41 and the rod end is hinged to one side of the fixing plate 21 of the second heating means 30 so that the second heating means according to the contraction or expansion of the rod ( A moving means 40 including a cylinder 46 for rotating the fixed plate 21 of the 30; Tread supply device of a tire molding machine comprising a. The method of claim 1, The height adjustment member, a pair of guide rods 25 is fixed so that one end is fixed to the fixed plate 21 and the other end is slid up and down by a predetermined length through the sleeve 24 attached to the heating plate 22, The tread of the tire forming machine, which is installed between the pair of guide rods 25 and includes a height adjusting screw 27 coupled to the height adjusting bundle 26 which is moved in the rotational direction by helically coupling to the outer diameter. Feeder. The method of claim 1, A position sensor for detecting respective positions when the front end and the rear end of the tread (T) conveyed along the conveyor reach a heating position; A temperature sensor measuring a temperature of the heating lamp 23; A controller for controlling the conveyor, the first and second heating means (20) (30), the moving means (40), a position sensor and a temperature sensor; Tread supply device of the tire molding machine characterized in that it further comprises. The method of claim 1, The standby position is a position parallel to the tread (T) transfer direction in accordance with the contraction of the rod of the cylinder 46, the operating position and the transfer direction of the tread (T) in accordance with the expansion of the rod of the cylinder (46) Tread supply device of the tire molding machine, characterized in that the vertical position. The method according to any one of claims 1 to 3, The heating plate (22) is provided with a transparent glass plate (28) surrounding the entire heating lamp (23), tread supply apparatus for a tire molding machine. The method according to any one of claims 1 to 3, The first heating means 20 is vertically installed in a lower portion of the front end of the conveyor along the width direction of the conveyor, the second heating means 30 is the upper portion of the conveyor between the front end and the lower end of the conveyor A tread supply device for a tire molding machine, characterized in that it is installed vertically downward along the longitudinal direction. The method according to any one of claims 1 to 3, The block 43 is connected to the body of the cylinder 46 by a connecting bracket 45, one end of the connecting arm 47 is hinged to the rod end of the cylinder 46, the connecting arm 47 The other end of the tread supply apparatus of the tire forming machine, characterized in that 90 ° rotatably installed on the hinge shaft (49) fixed through the hinge bracket (48) on one side of the fixing plate (21) of the heating means. The method according to any one of claims 1 to 3, Tread supply device of the tire molding machine, characterized in that the heating lamp (23) is a halogen lamp.

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