Segmented mold mechanism of engineering tire vulcanizing machine

Abstract

The utility model discloses a segmented mold mechanism of an engineering tire vulcanizing machine, which comprises a machine frame, a working table is fixed on the top of the machine frame, a middle mold sleeve is fixed on the working table, a lower mold is arranged on the working table at the bottom of an inner cavity of the middle mold sleeve, and the lower mold is arranged on the working table through a jacking mechanism. The rack is further provided with an upper die which is pressed downwards, and a plurality of pattern blocks are arranged on the inner wall of the middle die sleeve in a sliding mode; the mold is characterized in that exhaust ports are formed in the upper mold and the pattern blocks, and opening and closing mechanisms used for opening and closing the exhaust ports are arranged on the upper mold and the pattern blocks; according to the utility model, high-pressure nitrogen is introduced into the curing bladder through the exhaust port to exhaust gas in the segmented mold, and after the curing bladder is expanded, the exhaust port is closed, so that the curing bladder is prevented from being squeezed into the exhaust port in the high-pressure curing process to cause unevenness of the surface of the curing bladder.

Description

Technical Field

[0001] This utility model relates to the technical field of vulcanizing machine movable molds, specifically a movable mold mechanism for an engineering tire vulcanizing machine. Background Technology

[0002] As is well known, a movable mold is required during the vulcanization process of radial tires. During operation, the movable mold controls the radial opening and closing of several sector-shaped blocks on it by operating the vulcanizing machine's water cylinder. The existing vulcanizing machine water cylinder assembly consists of components such as a power water cylinder connecting plate. During operation, the piston of the power water cylinder moves up and down, driving the sector-shaped blocks of the movable mold to move relatively vertically via the piston rod and connecting plate. Simultaneously, the sector-shaped blocks undergo radial movement (opening and closing) under the action of the outer inclined surface. The extension and retraction of multiple movable blocks in the mold are controlled by a water cylinder. When the piston rod descends, it pushes the movable blocks of the mold to extend; when the piston rod rises, it drives the movable blocks of the mold to retract. During the manufacturing process, high-pressure nitrogen gas needs to be introduced into the vulcanized blank to provide the pressure required for vulcanization. The vulcanized blank expands and squeezes the movable mold, working in conjunction with the vulcanizing machine to shape and vulcanize the green tire, thereby improving the tire's strength. However, in existing extrusion movable molds, high-pressure nitrogen gas is introduced into the vulcanized blank to expel the gas inside the movable mold through venting. This means that the vent is always open, and the expanding blank can easily squeeze into the vent during the vulcanization process, causing unevenness on the tire surface and potentially leading to localized bursts. Utility Model Content

[0003] To address the existing technology's problem of introducing high-pressure nitrogen into the vulcanizing blank to expel gas from the movable mold, which keeps the vent hole open for extended periods, causing the blank to expand and easily squeeze into the vent hole during vulcanization, resulting in uneven tire surface and potential for localized bursting, this utility model provides a movable mold mechanism for an engineering tire vulcanizing machine.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a movable mold mechanism for an engineering tire vulcanizing machine, comprising a frame, a worktable fixed to the top of the frame, a middle mold sleeve fixed to the worktable, a lower mold installed at the bottom of the inner cavity of the middle mold sleeve on the worktable, and the lower mold installed on the worktable via an upper lifting mechanism. An upper mold for downward pressing is also installed on the frame, and multiple patterned blocks are slidably arranged on the inner wall of the middle mold sleeve. The invention is characterized in that both the upper mold and the patterned blocks are provided with vents, and both the upper mold and the patterned blocks are provided with opening and closing mechanisms for opening and closing the vents.

[0006] As a preferred embodiment of this utility model, the opening and closing mechanism includes a telescopic cavity disposed on the back side of the upper mold and the patterned block and corresponding to the exhaust port. The telescopic cavity is provided with a telescopic block that moves along the telescopic cavity. The telescopic block is provided with a plug that is inserted into the exhaust port. After the plug is inserted into the exhaust port, the inner end face of the plug is flush with the interior of the upper mold and the patterned block. The back side of the upper mold and the patterned block is fixed with an opening and closing cylinder by a positioning frame. The telescopic end of the opening and closing cylinder is fixed with the telescopic block. The exhaust port is elongated.

[0007] As a preferred embodiment of this utility model, the telescopic block is provided with multiple vents.

[0008] As a preferred technical solution of this utility model, the exhaust ports are provided in multiple ways and are evenly distributed on the upper mold and the patterned block.

[0009] As a preferred technical solution of this utility model, the telescopic block is provided with an airflow sensor for detecting the airflow discharged from the vent.

[0010] The beneficial effects of the utility model are:

[0011] This type of engineering tire vulcanizing machine features a movable mold mechanism with vents on both the upper mold and the tread block. These vents are equipped with opening and closing mechanisms to control their operation. High-pressure nitrogen gas is introduced into the vulcanizing bladder through these vents to expel gas from the movable mold. After the vulcanizing bladder expands, the vents are closed. This prevents the vulcanizing bladder from being squeezed into the vents during high-pressure vulcanization, which could cause unevenness on the surface and potentially lead to localized bursting. The opening and closing mechanism utilizes the extension and retraction of an opening and closing cylinder to drive the plunger. This design is simple and easy to control. Attached Figure Description

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of the movable mold mechanism of an engineering tire vulcanizing machine according to the present invention;

[0014] Figure 2 This is a schematic diagram of the opening and closing mechanism of the movable mold mechanism of an engineering tire vulcanizing machine according to the present invention.

[0015] In the diagram: 1. Frame; 2. Workbench; 3. Middle mold sleeve; 4. Lower mold; 5. Upper ejector mechanism; 6. Upper mold; 7. Patterned block; 8. Exhaust port; 9. Telescopic cavity; 10. Telescopic block; 11. Plug; 12. Insert; 13. Opening and closing cylinder; 14. Vent; 15. Limiting groove; 16. Limiting block; 17. Airflow sensor. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] Example: Figure 1 and Figure 2 As shown, this utility model discloses a movable mold mechanism for an engineering tire vulcanizing machine, comprising a frame 1, a worktable 2 fixed to the top of the frame 1, a middle mold sleeve 3 fixed on the worktable 2, a lower mold 4 installed at the bottom of the inner cavity of the middle mold sleeve 3 on the worktable 2, and the lower mold 4 installed on the worktable 2 via an upper lifting mechanism 5. An upper mold 6 with downward pressing is also installed on the frame 1, and a plurality of patterned blocks 7 are slidably arranged on the inner wall of the middle mold sleeve 3; characterized in that the upper mold 6 and the patterned blocks 7 are each provided with an exhaust port 8, and the upper mold 6 and the patterned blocks 7 are each provided with an opening and closing mechanism for opening and closing the exhaust port 8. By providing vents 8 on both the upper mold 6 and the patterned block 7, and by providing opening and closing mechanisms on both the upper mold 6 and the patterned block 7 for opening and closing the vents 8, high-pressure nitrogen gas is introduced into the vulcanizing capsule through the vents 8 to expel the gas inside the movable mold. After the vulcanizing capsule expands, the vents 8 are then closed. This prevents the vulcanizing capsule from being squeezed into the vents 8 during the high-pressure vulcanization process, which would cause unevenness on the surface of the vulcanizing capsule and may also cause local bursting.

[0018] The opening and closing mechanism includes a telescopic cavity 9 located on the back side of the upper mold 6 and the patterned block 7, corresponding to the exhaust port 8. A telescopic block 10, which moves along the telescopic cavity 9, is located within the telescopic cavity 9. A plug 11, which is inserted into the exhaust port 8, is mounted on the telescopic block 10. After the plug 11 is inserted into the exhaust port 8, its inner end face is flush with the interior of the upper mold 6 and the patterned block 7. An opening and closing cylinder 13 is fixed to the back side of the upper mold 6 and the patterned block 7 via a positioning frame 12. The telescopic end of the opening and closing cylinder 13 is fixed to the telescopic block 10. The exhaust port 8 is elongated. The opening and closing mechanism utilizes the telescopic end of the opening and closing cylinder 13 to drive the plug 11 to open and close, thus offering the advantages of simple structure and easy control.

[0019] The telescopic block 10 is provided with multiple vents 14, so that the exhaust port can be connected to the outside, which facilitates exhaust.

[0020] The exhaust ports 8 are provided in multiple locations and are evenly distributed on the upper mold 6 and the patterned block 7, which allows for multi-directional exhaust and has the characteristic of good exhaust effect.

[0021] The telescopic block 10 is equipped with an airflow sensor 17 for detecting the airflow discharged from the vent 14. By detecting the discharged airflow, it is convenient to monitor the airflow discharge inside the movable mold and to control the opening and closing mechanism to open and close the exhaust port 8.

[0022] During operation, the movable mold mechanism of this type of engineering tire vulcanizing machine has vents 8 on both the upper mold 6 and the tread block 7, and opening and closing mechanisms on both the upper mold 6 and the tread block 7 for opening and closing the vents 8. High-pressure nitrogen gas is introduced into the vulcanizing bladder through the vents 8 to expel the gas inside the movable mold. After the vulcanizing bladder expands, the vents 8 are then closed. This prevents the vulcanizing bladder from being squeezed into the vents 8 during the high-pressure vulcanization process, which would cause unevenness on the surface of the vulcanizing bladder and may also cause local bursting.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A movable mold mechanism for an engineering tire vulcanizing machine, comprising a frame (1), a worktable (2) fixed to the top of the frame (1), a middle mold sleeve (3) fixed on the worktable (2), a lower mold (4) installed at the bottom of the inner cavity of the middle mold sleeve (3) on the worktable (2), the lower mold (4) being mounted on the worktable (2) via an upper lifting mechanism (5), an upper mold (6) for downward pressing also being installed on the frame (1), and a plurality of patterned blocks (7) slidingly disposed on the inner wall of the middle mold sleeve (3); characterized in that, The upper mold (6) and the patterned block (7) are both provided with exhaust ports (8), and the upper mold (6) and the patterned block (7) are both provided with opening and closing mechanisms for opening and closing the exhaust ports (8).

2. The movable mold mechanism of an engineering tire vulcanizing machine according to claim 1, characterized in that, The opening and closing mechanism includes a telescopic cavity (9) located on the back side of the upper mold (6) and the patterned block (7) and corresponding to the exhaust port (8). The telescopic cavity (9) is provided with a telescopic block (10) that moves along the telescopic cavity (9). The telescopic block (10) is provided with a plug (11) that is inserted into the exhaust port (8). After the plug (11) is inserted into the exhaust port (8), the inner end face of the plug (11) is flush with the interior of the upper mold (6) and the patterned block (7). The upper mold (6) and the back side of the patterned block (7) are fixed with an opening and closing cylinder (13) by a positioning frame (12). The telescopic end of the opening and closing cylinder (13) is fixed to the telescopic block (10). The exhaust port (8) is elongated.

3. The movable mold mechanism of an engineering tire vulcanizing machine according to claim 2, characterized in that, The telescopic block (10) is provided with multiple vents (14).

4. The movable mold mechanism of an engineering tire vulcanizing machine according to claim 2, characterized in that, The exhaust ports (8) are provided in multiple and are evenly distributed on the upper mold (6) and the patterned block (7).

5. The movable mold mechanism of an engineering tire vulcanizing machine according to claim 2, characterized in that, The telescopic block (10) is equipped with an airflow sensor (17) for detecting the airflow discharged from the vent (14).

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