KR101042925B1 - Tire extruder with movable head - Google Patents

Abstract

PURPOSE: A tire extruder for a movable head is provided to improve the durability of a clamp rod by adjusting the restricted state of the clamping rod through the rotation of a binder. CONSTITUTION: A tire extruder for a movable head comprises a movable head(20), a clamp rod(30), a pressing wedge(50), and an oblique block(60). The oblique block is fixed to the front surface of the clamp rod. A stopper is radially protruded from the front end of the clamp rod. The front end of the clamp rod is inserted into a through hole of the movable head. The pressing wedge is installed in the front of the oblique block and is powered by a pressing cylinder of a main body(10). When the pressing wedge is moved in a direction crossing the clamp rod, the oblique block and the clamp rod are moved backward.

Description

Movable Head Tire Extruder {TIRE EXTRUDER WITH MOVABLE HEAD}

According to the present invention, a plurality of extrusion cylinders and movable heads are installed and a plurality of movable heads are closely combined to form a multi-layer extrudate flow path, so that extrudates discharged from different extrusion cylinders are laminated simultaneously with extrusion. An extruder, comprising: an inclined block formed with an inclined surface on a clamp rod for adjusting the tight fixing and opening of the movable head, and a pressing wedge which is in contact with the inclined surface of the inclined block and driven by the press cylinder, As the pressing wedge moves, a strong force can be applied in the axial direction of the clamp rod in which the inclined block is installed, thereby enabling a tight close combination of the movable heads.

In addition, a binder for adjusting the restraint state of the clamp rod end stopper is installed in the movable head into which the clamp rod is inserted, so that the fixed state of the movable head can be easily changed without rotating the clamp rod itself. .

The manufacturing process of rubber-based tires differs in detail depending on the type of tire.However, the basic manufacturing process consists of an intermediate molding process that forms the basic shape of a tire by winding raw materials into a plate or ribbon shape In this case, a vulcanization process is performed in which a mold is completed and elasticity is applied by putting it in a mold and applying heat and pressure.

FIG. 1 shows a green tire having only a basic shape of a tire as a semi-finished product after an intermediate molding process. As can be seen from the drawing, the green tire is composed of rubber extrudates and the like. A plurality of different objects are stacked and wound up to constitute them.

The rubber extrudate of the laminated state is configured by laminating the extrusion-molded object through a separate process or through the multilayer extruder as shown in FIG.

As can be seen from Figs. 2 and 3, the multi-layer extruder is provided with a plurality of extrusion cylinders 11 and movable heads 20, and the multi-layered extrudate as the movable heads 20 are tightly combined. An extruder is a structure in which an extrudate of different physical properties discharged from different extrusion cylinders 11 is formed and is fusion-laminated at the same time as extrusion, and removes deposits in the extrudate flow path including the discharge port of the extrusion cylinder 11. As shown in Figure 3 for the maintenance of the movable head 20 has a structure that can be exposed to the flow path of the extrudate as the head shaft 21 is rotated and opened to the axis.

That is, when extruding the extrudate while the screw 12 embedded in the extrusion cylinder 11 is rotated as shown in FIG. 2, a stopper 28 connected to the clamp cylinder 29 is movable head. As the pressure is applied to the movable heads 20, the movable heads 20 overcome the discharge pressure of the extrusion cylinder 11 and are tightly combined to form a flow path of the extrudate. As in 3, the movable head 20 which is hinged through the main body 10 and the head shaft 21 and connected to the deployment cylinder 27 is rotated by the deployment cylinder 27 to the head shaft 21 by the axis. To be open.

The close contact of the movable head 20 during the operation of the extrusion cylinder 11 is made by the stopper 28 pressing the movable head 20 to the rear side by the clamp cylinder 29, as shown in the upper view of FIG. As shown in the lower view of the figure, the restraint state of the movable head 20 is released by retracting and leaving the through hole 22 formed in the movable head 20 after the stopper 28 rotates.

As described above, the conventional movable head 20 type extruder has a axial tension-side pressure of the clamp cylinder 29 directly acting on the movable head 20 through the stopper 28 to tightly fix the movable head 20, When the restraint state of the movable head 20 is released, the stopper 28 rotates to leave the through hole 22. The pressure cylinder 11 of the clamp cylinder 29 and the extrusion cylinder 11 acting on the movable head 20 are released. There have been many problems in the effective overcoming of the discharge pressure and the rotating structure for the retraction of the stopper 28.

First, in order to maintain the tightly fixed state of the movable head 20, the stopper 28 must press the movable head 20 strongly. For this purpose, the pressure in the axial tension side of the clamp cylinder 29, which is a fluid cylinder, Although it is necessary to be kept constant and powerful, the structure in which the discharge pressure of the extrusion cylinder 11 acting on the movable head 20 is directly transmitted to the clamp cylinder 29 through the stopper 28 and the piston rod. As a result, the clamp cylinder 29 is exposed to the discharge pressure of the extrusion cylinder 11 for a long time.

Due to the characteristics of the fluid cylinder for a long period of continuous axial external force, the output may be lowered due to the limit of tightness of the interior of the cylinder in which the fluid pressure is applied, and thus the clamp cylinder which should provide a long term firm adhesion to the movable head 20 ( 29), there is a need to secure an excellent output compared to the discharge pressure of the extrusion cylinder 11, there is a problem that an expensive large-capacity fluid cylinder should be applied.

In addition, in rotating the stopper 28 to adjust the restraint state of the movable head 20, the piston rod, which is an axis connecting the stopper 28 and the clamp cylinder 29, is divided, and the motor and gears are divided into the divided shafts. It is necessary to install a separate rotating means, or to be configured to rotate the entire configuration connected to the clamp cylinder 29 and the stopper 28, which not only complicates the configuration of the entire extruder, but also increases the production cost and piston There was a serious problem such that the splitting part of the rod acts as a weak mechanical part and causes a failure.

The present invention has been made in view of the above-described problems, and a plurality of extruded cylinders 11 are installed, and a plurality of movable heads 20 hingedly connected to the main body 10 are provided at the outlets of the extruded cylinders 11. In the multi-layer extruder for tire manufacturing, in which a plurality of movable heads 20 are closely coupled and a multi-layered extrudate flow path is formed so that extrudates discharged from a plurality of extruded cylinders 11 are laminated at the same time as extrusion. A through hole 22 penetrating the front and rear 20 is formed, the inclined block 60 is formed on the front surface of the clamp is fixed and the stopper (28) protruding radially protruding at the tip end A clamp rod 30 is installed to reciprocate in the axial direction, and the tip of the clamp rod 30 is inserted into the through hole 22 of the movable head 20, and is fixed to the main body 10. Driven by a cylinder (59) The formed pressing wedge 50 is installed on the front side of the inclined block 60, so that the inclined surface and the inclined block 60 of the pressing wedge 50 as the pressing wedge 50 moves in the direction crossing the clamp rod 30. ) Is a movable head tire extruder, characterized in that the inclined surface is in contact with the inclined block 60 and the clamp rod 30 is retracted, and the support block 70 fixed to the main body 10 on the front side of the pressing wedge 50. It is installed is characterized in that the front surface of the pressing wedge 50 in contact with the support block 70 during the movement of the pressing wedge 50 to suppress the axial movement and deformation of the clamp rod 30 of the pressing wedge 50 Head tire extruder.

In addition, a through hole 22 penetrating back and forth through the movable head 20 is formed, but a through hole 22 and a concentric expanding portion 23 are formed in the front portion of the movable head 20, and are radially formed at the tip. Iii) a clamp rod 30 having a stopper 28 protruding therefrom is installed to be reciprocated in an axial direction, and the tip end of the clamp rod 30 is a through hole of the movable head 20. A hollow binder 40 inserted into the 22 and connected to a front end of the driving unit 41 fixed to the movable head 20 and having an entrance hole 42 and a locking jaw 43 formed at a rear end thereof. ) Is inserted into the dilatation part 23, the stopper 28 of the clamp rod 30 passing through the through hole 22 passes through the entrance hole 42 and enters the inside of the binder 40. 41, as the binder 40 is rotated, the alignment state of the stopper 28 and the catching jaw 43 is changed so that the stopper 28 is restrained and released. A.

According to the present invention, it is possible not only to firmly maintain the movable head tight fixation state of the multi-layer extruder for manufacturing tires, but also to reduce the pressure of the fluid cylinder that may be generated when the movable head is fixed through the fluid cylinder for a long time, and thus the movable head tightness. State relaxation can be prevented fundamentally.

In addition, it is possible to adjust the restraint state of the clamp rod by rotating the binder installed on the movable head without rotating the clamp rod itself, which maintains the close contact of the movable head. It can be simplified.

As a result, the quality of the extrudate can be improved by preventing the leakage of the extrudate due to the loosening of the movable head, which is frequently used during the operation of the multilayer extruder for manufacturing tires, and the post-treatment process such as scrap removal, and the extruder are operated. The need for follow-up work caused by the leakage of the extrudate such as interruption and repair is alleviated, thereby improving the work efficiency and reducing the manufacturing cost in the tire manufacturing process.

1 is a schematic explanatory diagram of a tire manufacturing process
Figure 2 is a representative cross-sectional view of a conventional multi-layer extruder operating state
Figure 3 is a representative cross-sectional view of a conventional multi-layer extruder movable head open state
Figure 4 is a schematic diagram of a conventional multi-layer extruder movable head restraint method
Figure 5 is an exemplary cross-sectional view of the movable head restraint state in one embodiment of the present invention
Figure 6 is a representative cross-sectional view of the movable head open state of the embodiment 5
7 is an explanatory view of a movable head restraint method of the embodiment of FIG. 5;
FIG. 8 is a perspective view illustrating a partial cutting of the binder and the clamp rod of FIG. 5.
Figure 9 is a perspective view of the cut part of the clamp rod operating system of the embodiment 5
10 is a perspective view of main parts excerpt of the present invention
Figure 11 is a representative cross-sectional view of an embodiment of the present invention the support block is applied
Figure 12 is a perspective view of the main portion of the excerpt of Figure 11 embodiment

The detailed configuration and operation principle of the present invention will be described with reference to the accompanying drawings.

First, FIG. 5 is a representative cross-sectional view of the present invention in which the movable head 20 is tightly combined. As can be seen from the drawing, the clamp rod 30 penetrating the movable head 20 is attached to the binder 40. It is restrained and released by the inclined block 60 is fixed to the clamp rod (30).

A reciprocating cylinder 39 is connected to the rear end of the clamp rod 30 so that the clamp rod 30 reciprocates in the axial direction as the reciprocating cylinder 39 operates, and the inclined block 60 installed in the clamp rod 30. The pressing wedge 50 driven by the pressing cylinder 59 is installed at the front side.

In the illustrated embodiment, the pressing cylinder 59 is installed in a direction orthogonal to the clamp rod 30 such that the pressing wedge 50 driven by the pressing cylinder 59 also moves in the direction perpendicular to the clamp rod 30. do.

As shown in FIG. 6, when the clamp rod 30 is retracted by the reciprocating cylinder 39 after the restrained state of the clamp rod 30 is released, the movable head 20 is operated, and the deployment cylinder 27 is operated. As the movable head 20 rotates around the head shaft 21, the flow path of the extrudate including the discharge port of the extrusion cylinder 11 is exposed.

FIG. 7 is a partial cutaway perspective view of the main components for the restraint of the movable head 20 during the operation of the extrusion cylinder 11 in the present invention. A through hole 22 through which the clamp rod 30 can pass is formed, and a through hole 22 is formed concentrically in the through hole 22 of the front portion of the movable head 20. A cylindrical binder 40 is inserted into 23.

The reciprocating cylinder 39 and the pressing cylinder 59 for driving the clamp rod 30 and the pressing wedge 50, respectively, are fixed to the main body 10 of the multi-layer extruder of the present invention. In the illustrated embodiment, the main body 10 and It is fixed to the closed support frame 19 of the integrated form or attached to the main body 10, such a method of fixing between the reciprocating cylinder 39, the pressing cylinder 59 and the main body 10 is the technical field to which the present invention belongs. Since it is a matter that can be applied by those of ordinary skill in the selection does not specifically limit the scope of the claims.

FIG. 8 is a partial cutaway perspective view of the binder 40 and the clamp rod 30 of the present invention, and a stopper 28 protruding radially is formed at the tip of the clamp rod 30, and the hollow ( At the rear end of the hollow cylindrical binder 40, an exit hole 42 having a cross-sectional shape through which the stopper 28 can pass, and a locking projection 43 equal to the protrusion of the stopper 28 are formed. As a result, the restraint state of the stopper 28 is adjusted as the binder 40 rotates.

That is, the binder 40 is rotated while the stopper 28 of the clamp rod 30 passes through the access hole 42 of the binder 40 and is inserted into the binder 40, and thus the locking jaw 43 and the stopper ( The stopper 28 is constrained when the protrusions of 28 are aligned on the same line, and the restrained state of the stopper 28 is released when the binder 40 is reversely rotated so that the locking jaw 43 is separated from the protrusion of the stopper 28. Thus, the clamp rod 30 can be retracted.

In the illustrated embodiment, the protrusion of the stopper 28 and the latching jaw of the binder 40 are formed at intervals of 120 degrees, so that the binder 40 can be restrained and released by rotating the binder 40 at 60 degrees. Through the three-point fixing of the stopper 28, it is possible to prevent the occurrence of eccentric stress of the clamp rod 30 due to uneven contact between the protrusion of the stopper 28 and the locking step of the binder 40.

As shown in FIG. 7, the binder 40 of the present invention is connected to the driving unit 41 and inserted into the expansion unit 23, and the driving unit 41 is fixed to the movable head 20.

The driving unit 41 for applying the rotational force to the binder 40 may be applied to a variety of means for generating a rotational motion, such as an electric motor, a hydraulic motor, but need not be rotated more than 360 degrees, but the forward and reverse rotation of the exact angle is required, It is preferable to apply a rotary actuator to the driving unit 41 due to the characteristics of the present invention, in which a plurality of fluid cylinders are installed to facilitate fluid pressure utilization.

FIG. 9 is a partial cutaway perspective view illustrating components such as a pressing cylinder 59, a pressing wedge 50, and an inclined block 60 that provide the clamp rod 30 with a strong axial force. The clamp rod 30 coupled to the support frame 19 to enable this is fixed to the inclined block 60 formed on the inclined surface on the front surface, the pressing fixed to the support frame 19 on the front side of the inclined block 60 The pressing wedge 50 which is reciprocated in the direction orthogonal to the clamp rod 30 by the cylinder 59 is provided.

An inclined surface corresponding to the inclined surface of the inclined block 60 is formed on the rear surface of the pressing wedge 50, and as shown in FIG. 10, the inclined block is moved when the pressing wedge 50 moves in a direction perpendicular to the clamp rod 30. While the inclined surface of the 60 and the inclined surface of the pressing wedge 50 are in contact with each other, a strong pressing force is applied to the rear side along the axis of the clamp rod 30.

At this time, the inclination angle θ formed between the inclined surface of the pressing wedge 50 and the axis of the pressing cylinder 59 is 45 degrees or less, so that the output of the pressing cylinder 59 is efficiently transmitted to the clamp rod 30, while the clamp rod 30 The delivery of the ejection pressure of the extrusion cylinder 11 acting on the 30 to the press wedge 50 and the press cylinder 59 can be suppressed as much as possible.

As such, by suppressing the transmission of the discharge pressure of the extrusion cylinder 11 that relaxes the output of the pressure cylinder 59, the effective output of the pressure cylinder 59 can be maintained, as well as the required output can be reduced, thereby miniaturizing the pressure cylinder 59. have.

On the other hand, the lower end of the pressing wedge 50 is formed with a cutout 51 so that the pressing wedge 50 and the clamp rod 30 does not collide during the operation of the pressing wedge 50.

11 and 12 are installed through the clamp rod 30 and the inclined block 60 by installing a support block 70 fixed to the main body 10 on the front side of the pressing wedge 50 to the clamp rod 30 By the discharge pressure of the extrusion cylinder (11) acting in the axial direction of the piston rod (piston rod) of the pressure cylinder (59) is to prevent the phenomenon causing the bending deformation.

That is, as in the elliptic enlarged portion of FIG. 11 and FIG. 12, the pressing wedge 50 is supported while the front surface of the pressing wedge 50 is in contact with the support block 70 when the pressing wedge 50 moves. (59) The deflection of the piston rod can be suppressed.

In the illustrated embodiment, the support block 70 is installed in a manner that is separately manufactured and attached to the main body 10 or the support frame 19, but may be manufactured integrally with the main body 10 or the support frame 19. .

10: Body
11: extrusion cylinder
12: screw
19: support frame
20: movable head
21: head shaft
22: through hole
23: expansion
27: deployment cylinder
28: stopper
29: clamp cylinder
30: clamp rod
39: reciprocating cylinder
40: binder
41: drive unit
42: entrance hole
43: jamming jaw
50: compression wedge
51: incision
59: pressure cylinder
60: inclined block
70: support block

Claims (3)

A plurality of extruded cylinders 11 are installed, and a plurality of movable heads 20 hingedly connected to the main body 10 are installed at the discharge ports of the extruded cylinders 11, and the plurality of movable heads 20 are in close contact. In the multi-layer extruder for tire production, a multi-layered extrudate flow path is formed and the extrudate discharged from the plurality of extrusion cylinders 11 is laminated at the same time as the extrusion.
A through hole 22 penetrating back and forth through the movable head 20 is formed;
An inclined block 60 having an inclined surface formed thereon is fixedly installed, and a clamp rod 30 having a stopper 28 protruding radially from the front end thereof is installed to be reciprocated in the axial direction. A tip end of the clamp rod 30 is inserted into the through hole 22 of the movable head 20;
The pressing wedge 50, which is driven by the pressing cylinder 59 fixed to the main body 10 and formed on the inclined surface at the rear side, is installed at the front side of the inclined block 60,
As the pressing wedge 50 moves in the direction crossing the clamp rod 30, the inclined surface of the pressing wedge 50 and the inclined surface of the inclined block 60 come into contact with each other and the inclined block 60 and the clamp rod 30 retreat. A movable head tire extruder, characterized in that.
A plurality of extruded cylinders 11 are installed, and a plurality of movable heads 20 hingedly connected to the main body 10 are installed at the discharge ports of the extruded cylinders 11, and the plurality of movable heads 20 are in close contact. In the multi-layer extruder for tire production, a multi-layered extrudate flow path is formed and the extrudate discharged from the plurality of extrusion cylinders 11 is laminated at the same time as the extrusion.
A through hole 22 penetrating back and forth through the movable head 20 is formed in the front portion of the movable head 20, and a through hole 22 and an enlarged concentric portion 23 are formed;
A clamp rod 30 having a stopper 28 projecting radially at the tip end thereof is installed to be reciprocated in an axial direction, and the tip end of the clamp rod 30 is movable head ( Is inserted into the through hole 22 of 20);
A hollow binder 40 having a front end connected to a driving part 41 fixed to the movable head 20 and an entrance hole 42 and a locking jaw 43 formed at the rear end thereof is an expansion part 23. Inserted in;
When the stopper 28 of the clamp rod 30 passing through the through hole 22 enters the binder 40 through the access hole 42, the binder 40 rotates by the driving unit 41. According to the stopper 28 and the engaging jaw 43 the alignment state of the movable head tire extruder, characterized in that the stopper 28 is restrained and released.
According to claim 1, wherein the support block 70 is fixed to the main body 10 is installed on the front side of the pressing wedge 50 so that the front surface of the pressing wedge 50 is moved to the support block 70 when the pressing wedge 50 is moved. A movable head tire extruder, characterized in that it restrains the axial movement and deformation of the clamp rod (30) in contact with the pressing wedge (50).

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