Extrusion die device with a conductive structure applicable to the tread triple composite extrusion

Abstract

The present invention relates to an extrusion die device with a conductive structure applicable to the tread three - compound extrusion, belonging to the field of tire production devices. An inner die plate, a middle die plate, and an outer die plate are installed inside the die box. The inner die plate is divided into an upper inner die plate and a lower inner die plate. The upper part, lower part, and middle part of the upper inner die plate are respectively processed with an upper flow channel, a lower flow channel, and a middle flow channel. The upper part and the middle part of the lower inner die plate are respectively processed with an upper flow channel and a middle flow channel. A middle die plate is provided at the outlet positions of the upper flow channel and the lower flow channel of the upper inner die plate. The middle die plate is also respectively processed with an upper flow channel, a lower flow channel, and a middle flow channel at its upper part, lower part, and middle part. An outer die plate is arranged at the outlets of the upper flow channel and the lower flow channel of the middle die plate. The outer die plate includes an upper outer die plate and a lower outer die plate connected by bolts. The middle flow channels of the upper inner die plate, the lower inner die plate, and the middle die plate together form a perfectly - fitting independent flow channel.

Description

Technical Field

[0001] The present invention relates to the field of tire production devices, and more specifically, to an extrusion die device for tread three-component extrusion with a conductive structure. Background Art

[0002] As is well known, the general technological progress of current passenger car tires in aspects such as low rolling resistance, high wet grip performance, and snow tires has led to the increasingly widespread application of silica in passenger car tires, and the proportion is also getting higher and higher. However, a high silica content in the tread will cause the electrical conductivity of the tire to deteriorate significantly, and the resistance of some finished tires even exceeds 10 10 Ω. Therefore, the static electricity generated during the driving of the tire cannot be smoothly conducted to the ground, posing a serious safety hazard to the driver and passengers. Therefore, some new tire factories' tread extrusion production lines will choose four-component or five-component extrusion in order to extrude a tread with conductive rubber and maintain good electrical conductivity of the tire. This will cause a significant increase in the equipment procurement cost of tire enterprises. It is understood that most of the current domestic tire enterprises' tread production lines are three-component extrusion, and the existing die devices cannot achieve the extrusion of a tread with conductive rubber, which greatly restricts the development and production of new products by each tire enterprise. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an extrusion die device for tread three-component extrusion with a conductive structure, which solves the problem that the three-component extrusion production line commonly existing in current tire enterprises cannot produce a tread with a conductive function, thus restricting the development of new products by tire enterprises.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A pressing die orifice device applicable to the extrusion of a three-layer composite tread with a conductive structure is provided with a die orifice box. Inside the die orifice box, an inner die orifice plate, a middle die orifice plate, and an outer die orifice plate are installed. The feature is that the inner die orifice plate is of a split structure and is divided into an upper inner die orifice plate and a lower inner die orifice plate. The upper part, lower part, and middle part of the upper inner die orifice plate are respectively processed with an upper flow channel on the upper inner die orifice plate, a lower flow channel on the upper inner die orifice plate, and a middle flow channel on the upper inner die orifice plate. The upper part and middle part of the lower inner die orifice plate are respectively processed with an upper flow channel on the lower inner die orifice plate and a middle flow channel on the lower inner die orifice plate. At the outlet positions of the upper flow channel on the upper inner die orifice plate and the lower flow channel on the upper inner die orifice plate of the upper inner die orifice plate, there is a middle die orifice plate. The middle die orifice plate is of an integral structure and is processed with an upper flow channel on the middle die orifice plate, a lower flow channel on the middle die orifice plate, and a middle flow channel on the middle die orifice plate at the upper part, lower part, and middle part respectively. At the outlet positions of the upper flow channel on the middle die orifice plate and the lower flow channel on the middle die orifice plate of the middle die orifice plate, there is an outer die orifice plate. The outer die orifice plate includes an upper outer die orifice plate and a lower outer die orifice plate connected by bolts, and there is an opening on the upper outer die orifice plate in the middle of the outer die orifice plate. When the upper inner die orifice plate, the lower inner die orifice plate, and the middle die orifice plate are installed in the die orifice box, the middle flow channel on the upper inner die orifice plate, the middle flow channel on the lower inner die orifice plate, and the middle flow channel on the middle die orifice plate together form a tightly fitting independent flow channel, and the height of the outlet of this flow channel is not less than the height of the opening on the outer die orifice plate.

[0005] The beneficial effect of the present invention is that without the need to transform the existing three-layer composite extruder, the extrusion of the conductive rubber tread can be realized, greatly saving the equipment procurement and transformation costs, accelerating the development and production of new products of conductive rubber tires, and improving the enterprise efficiency. Description of the Drawings

[0006] Figure 1 It is a schematic structural view of the present invention (the left half structural view that is symmetrical left and right in the rear view direction).

[0007] Figure 2 It is a schematic central cross-sectional structural view of the present invention (side view).

[0008] Figure 3 It is a schematic front view structural view of the upper inner die orifice plate of the present invention.

[0009] Figure 4 It is a schematic perspective view structural view of the upper inner die orifice plate of the present invention.

[0010] Figure 5 It is a schematic front view structural view of the lower inner die orifice plate of the present invention.

[0011] Figure 6 It is a schematic perspective view structural view of the lower inner die orifice plate of the present invention.

[0012] Figure 7 It is a schematic structural view of the general outer die orifice plate of the present invention.

[0013] Figure 8 Schematic diagram of the tread structure with conductive function Figure 1 。

[0014] Figure 9 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 1 (Front view).

[0015] Figure 10 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 1 (Oblique view).

[0016] Figure 11 Schematic diagram of the tread structure with conductive function Figure 2 。

[0017] Figure 12 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 2 (Front view).

[0018] Figure 13 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 2 (Oblique view).

[0019] Figure 14 Schematic diagram of the tread structure with conductive function Figure 3 。

[0020] Figure 15 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 3 (Front view).

[0021] Figure 16 Schematic diagram of the middle orifice plate of the present invention in cooperation with the inner orifice plate Figure 3 (Oblique view).

[0022] In the figure: 1. Orifice box, 2. Upper inner orifice plate, 3. Flow channel in the upper inner orifice plate, 4. Lower inner orifice plate, 5. Flow channel in the lower inner orifice plate, 6. Middle orifice plate, 7. Flow channel in the middle orifice plate, 8. Upper outer orifice plate, 9. Lower outer orifice plate, 10. Opening of the upper outer orifice plate, 11. Upward flow channel in the upper inner orifice plate, 12. Downward flow channel in the upper inner orifice plate, 13. Upward flow channel in the lower inner orifice plate, 14. Upward flow channel in the middle orifice plate, 15. Downward flow channel in the middle orifice plate. Detailed implementation mode

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] As shown in the figure, the present invention is provided with a mouth-shaped box 1. An inner mouth-shaped plate, a middle mouth-shaped plate 6, and an outer mouth-shaped plate are installed inside the mouth-shaped box 1. The inner mouth-shaped plate is of a split structure, including an upper inner mouth-shaped plate 2 and a lower inner mouth-shaped plate 4. The upper, lower, and middle parts of the upper inner mouth-shaped plate 2 are respectively processed with an upper flow channel 11 of the upper inner mouth-shaped plate, a lower flow channel 12 of the upper inner mouth-shaped plate, and a middle flow channel 3 of the upper inner mouth-shaped plate. At the outlets of the upper flow channel 11 of the upper inner mouth-shaped plate and the lower flow channel 12 of the upper inner mouth-shaped plate, there is a middle mouth-shaped plate 6. The middle mouth-shaped plate 6 is of an integral structure. The upper, lower, and middle parts of the middle mouth-shaped plate 6 are respectively processed with an upper flow channel 14 of the middle mouth-shaped plate, a lower flow channel 15 of the middle mouth-shaped plate, and a middle flow channel 7 of the middle mouth-shaped plate. At the outlet positions of the upper flow channel 14 of the middle mouth-shaped plate and the lower flow channel 15 of the middle mouth-shaped plate of the middle mouth-shaped plate 6, there is an outer mouth-shaped plate. The outer mouth-shaped plate includes an upper outer mouth-shaped plate 8 and a lower outer mouth-shaped plate 9 connected by bolts. There is an opening 10 of the upper outer mouth-shaped plate left in the middle of the outer mouth-shaped plate. The upper and middle parts of the lower inner mouth-shaped plate 4 are respectively processed with an upper flow channel 13 of the lower inner mouth-shaped plate and a middle flow channel 5 of the lower inner mouth-shaped plate. Separate flow channels are respectively designed in the middle parts of the upper inner mouth-shaped plate 2, the lower inner mouth-shaped plate 4, and the middle mouth-shaped plate 6. When the upper inner mouth-shaped plate 2, the lower inner mouth-shaped plate 4, and the middle mouth-shaped plate 6 are installed into the mouth-shaped box 1, the middle flow channel 3 of the upper inner mouth-shaped plate, the middle flow channel 5 of the lower inner mouth-shaped plate, and the middle flow channel 7 of the middle mouth-shaped plate together form an independent flow channel, which can lead the intermediate transition rubber through this independent flow channel to above the tread, forming a chimney-shaped rubber strip penetrating the tread, playing a role in guiding away the static electricity of the tire, commonly known as "chimney rubber" or "conductive rubber" in the industry. The conductive rubber flows through the middle flow channel 5 of the lower inner mouth-shaped plate of the lower inner mouth-shaped plate 4, the middle flow channel 3 of the upper inner mouth-shaped plate of the upper inner mouth-shaped plate 2, and the middle flow channel 7 of the middle mouth-shaped plate of the middle mouth-shaped plate 6 in sequence, and reaches the opening 10 of the upper outer mouth-shaped plate of the upper outer mouth-shaped plate 8, forming a conductive rubber strip penetrating the tread. In order to prevent the position of the conductive rubber strip from falling into the tread groove and failing to play a conductive role, the position of the front end outlet of the middle flow channel 7 of the middle mouth-shaped plate 6 can be adjusted by design to achieve the extrusion of the conductive rubber tread at different positions in the middle of the tread, on the right side of the axisymmetric line of the tread, and on the left side of the axisymmetric line of the tread.

[0025] As shown in the figure, the side wing glue flows through the upper runner 11 of the inner profile upper plate 2 of the inner profile upper plate, reaches the outer profile upper plate opening 10 of the outer profile upper plate 8 through the upper runner 14 of the middle profile plate 6. The tread glue flows through the lower runner 12 of the inner profile upper plate 2 of the inner profile upper plate, reaches the outer profile upper plate opening 10 of the outer profile upper plate 8 through the lower runner 15 of the middle profile plate 6. The transition glue flows through the upper runner 13 of the inner profile lower plate 4 of the inner profile lower plate, reaches the outer profile upper plate opening 10 of the outer profile upper plate 8 through the lower part of the lower runner 15 of the middle profile plate 6. The conductive glue flows through the middle runner 5 of the inner profile lower plate 4 of the inner profile lower plate, the middle runner 3 of the inner profile upper plate 2 of the inner profile upper plate, and the middle runner 7 of the middle profile plate 6 in sequence, and reaches the outer profile upper plate opening 10 of the outer profile upper plate 8. It converges with the side wing glue flowing out from the upper runner 14 of the middle profile plate 6, the tread glue flowing out from the lower runner 15 of the middle profile plate 6, and the transition glue flowing out from the lower runner 15 of the middle profile plate 6 inside the outer profile upper plate opening 10 of the outer profile upper plate 8, and then they jointly flow through the outer profile upper plate opening 10 of the outer profile upper plate 8 to complete the extrusion production of the tread with conductive glue.

[0026] If producing Figure 8 the tread with conductive glue in the central structure as shown, then the middle profile plate shown in Figure 9 is required. The front end outlet of the middle runner 7 of the middle profile plate 6 is designed in the center of the middle profile plate 6. The side wing glue flows through the upper runner 11 of the inner profile upper plate 2 of the inner profile upper plate and the upper runner 14 of the middle profile plate 6 in sequence, and reaches the outer profile upper plate opening 10 of the outer profile upper plate 8. The tread glue flows through the lower runner 12 of the inner profile upper plate 2 of the inner profile upper plate and the lower runner 15 of the middle profile plate 6 in sequence, and reaches the outer profile upper plate opening 10 of the outer profile upper plate 8. The transition glue flows through the upper runner 13 of the inner profile lower plate 4 of the inner profile lower plate and the lower runner 15 of the middle profile plate 6 in sequence, and reaches the outer profile upper plate opening 10 of the outer profile upper plate 8. The conductive glue flows through the middle runner 5 of the inner profile lower plate 4 of the inner profile lower plate, the middle runner 3 of the inner profile upper plate 2 of the inner profile upper plate, and the middle runner 7 of the middle profile plate 6 in sequence to reach the outer profile upper plate opening 10 of the outer profile upper plate 8. The side wing glue, tread glue, transition glue, and conductive glue converge inside the outer profile upper plate opening 10 of the outer profile upper plate 8 and jointly flow through the outer profile upper plate opening 10 of the outer profile upper plate 8 to complete Figure 8 the tread extrusion as shown.

[0027] If producing Figure 11 the tread with conductive glue in the structure on the right side of the axis of symmetry as shown, then the middle profile plate shown in Figure 12The middle orifice plate 6 shown has the front end outlet of the flow channel 7 in the middle orifice plate of the middle orifice plate 6 designed on the right side of the axis of symmetry of the middle orifice plate 6. The side wing rubber sequentially flows through the upper flow channel 11 of the upper inner orifice plate of the upper inner orifice plate 2 and the upper flow channel 14 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The tread rubber sequentially flows through the lower flow channel 12 of the upper inner orifice plate of the upper inner orifice plate 2 and the lower flow channel 15 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The transition rubber sequentially flows through the upper flow channel 13 of the lower inner orifice plate of the lower inner orifice plate 4 and the lower flow channel 15 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The conductive rubber sequentially flows through the middle flow channel 5 of the lower inner orifice plate of the lower inner orifice plate 4, the middle flow channel 3 of the upper inner orifice plate of the upper inner orifice plate 2 and the middle flow channel 7 of the middle orifice plate of the middle orifice plate 6 to reach the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The four parts of the side wing rubber, the tread rubber, the transition rubber and the conductive rubber converge inside the opening 10 of the upper outer orifice plate of the outer orifice plate 8 and jointly flow through the opening 10 of the upper outer orifice plate of the outer orifice plate 8 to complete Figure 11 the tread extrusion shown.

[0028] If producing Figure 14 the tread with the conductive rubber structure on the left side of the axis of symmetry, then it is necessary to use Figure 15 the middle orifice plate 6 shown. The front end outlet of the flow channel 7 in the middle orifice plate of the middle orifice plate 6 is designed on the left side of the axis of symmetry of the middle orifice plate 6. The side wing rubber sequentially flows through the upper flow channel 11 of the upper inner orifice plate of the upper inner orifice plate 2 and the upper flow channel 14 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The tread rubber sequentially flows through the lower flow channel 12 of the upper inner orifice plate of the upper inner orifice plate 2 and the lower flow channel 15 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The transition rubber sequentially flows through the upper flow channel 13 of the lower inner orifice plate of the lower inner orifice plate 4 and the lower flow channel 15 of the middle orifice plate of the middle orifice plate 6, reaches the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The conductive rubber sequentially flows through the middle flow channel 5 of the lower inner orifice plate of the lower inner orifice plate 4, the middle flow channel 3 of the upper inner orifice plate of the upper inner orifice plate 2 and the middle flow channel 7 of the middle orifice plate of the middle orifice plate 6 to reach the opening 10 of the upper outer orifice plate of the outer orifice plate 8. The four parts of the side wing rubber, the tread rubber, the transition rubber and the conductive rubber converge inside the opening 10 of the upper outer orifice plate of the outer orifice plate 8 and jointly flow through the opening 10 of the upper outer orifice plate of the outer orifice plate 8 to complete Figure 14 the tread extrusion shown.

Claims

1. A pressing die device with a conductive structure applicable to the extrusion of a three - compound tread is provided with a die box. An inner die plate, a middle die plate, and an outer die plate are installed inside the die box. The characteristics are that The inner orifice plate is of a split structure and is divided into an upper inner orifice plate and a lower inner orifice plate. The upper, lower, and middle parts of the upper inner orifice plate are respectively machined with an upper flow channel of the upper inner orifice plate, a lower flow channel of the upper inner orifice plate, and a middle flow channel of the upper inner orifice plate. The upper and middle parts of the lower inner orifice plate are respectively machined with an upper flow channel of the lower inner orifice plate and a middle flow channel of the lower inner orifice plate. A middle orifice plate is provided at the outlet positions of the upper flow channel of the upper inner orifice plate and the lower flow channel of the upper inner orifice plate of the upper inner orifice plate. The middle orifice plate is of an integral structure and is respectively machined with an upper flow channel of the middle orifice plate, a lower flow channel of the middle orifice plate, and a middle flow channel of the middle orifice plate at the upper, lower, and middle parts. An outer orifice plate is provided at the outlet positions of the upper flow channel of the middle orifice plate and the lower flow channel of the middle orifice plate of the middle orifice plate. The outer orifice plate includes an upper outer orifice plate and a lower outer orifice plate connected by bolts, and there is an opening of the upper outer orifice plate left in the middle of the outer orifice plate. When the upper inner orifice plate, the lower inner orifice plate, and the middle orifice plate are installed in the orifice box, the middle flow channel of the upper inner orifice plate, the middle flow channel of the lower inner orifice plate, and the middle flow channel of the middle orifice plate jointly form a tightly sealed independent flow channel, and the outlet height of this flow channel is not less than the opening height of the outer orifice plate.

Images