Electromagnetic vulcanization mold for rubber air spring

Abstract

The utility model provides a rubber air spring electromagnetic vulcanization mould which comprises a mould assembly connected to an air spring vulcanizing machine, the mould assembly comprises an upper mould, a middle mould and a lower mould which are of a cylindrical structure, an upper seat is arranged at the top of the upper mould, the upper seat is connected with a pressing mechanism of the vulcanizing machine, and a lower seat is arranged at the top of the middle mould. The mold assembly and a center rod of the vulcanizing machine are coaxially arranged, epoxy resin is smeared on the peripheries of the upper mold, the middle mold and the lower mold, an electromagnetic coil is wound on the outer side of the epoxy resin, a heat preservation layer is arranged on the outer side of the electromagnetic coil, an aluminum magnetic shielding layer is arranged on the outer side of the heat preservation layer, and the outer side of the aluminum magnetic shielding layer is provided with a heat preservation layer. An electromagnetic coil heating mechanism is arranged on one side of the air spring vulcanizing machine, a temperature sensor is installed in an insertion hole in the mold assembly, and the electromagnetic coil heating mechanism and the temperature sensor are both connected with a controller; according to the vulcanizing mold, energy can be saved, temperature control is accurate, and the quality of finished air springs can be better guaranteed and improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air spring manufacturing equipment, and in particular relates to an electromagnetic vulcanization mold for a rubber air spring. Background Art

[0002] The vulcanization process is crucial in the manufacturing process of air springs and is also the main energy-consuming process. Traditional air springs use steam hot plates or steam mold sleeves to heat the mold, so that the rubber absorbs heat to achieve molecular hinges. According to tests, the boiler efficiency is 90%, the heat loss of steam transmission is 10%, the heat loss of the mold machine is 20%, and the condensed water takes away 20%. The steam is only used for vulcanized products for 40%, that is, the energy utilization rate is only 40%, and the energy loss is huge. Therefore, it is necessary to improve the traditional steam vulcanization process.

[0003] Electromagnetic heating: A controller generates a high-frequency alternating magnetic field for the electromagnetic coil, which senses a certain depth on the surface of the metal mold, causing the mold to produce an eddy current effect to generate heat that is absorbed by the product. Tests have shown that the heat transfer efficiency of electromagnetic induction is as high as 92% or more, and the temperature control is precise. Therefore, electric heating vulcanization will gradually replace steam heating in the tire industry and rubber products industry in the future.

[0004] In view of this, in order to solve the above technical problems, the utility model proposes an electromagnetic vulcanization mold that utilizes electromagnetic heating to heat the air spring embryo evenly, achieves high heat transfer and realizes precise temperature control, thereby solving the shortcomings brought by steam heating to the tire industry and the rubber products industry. Summary of the invention

[0005] The utility model provides an electromagnetic vulcanization mold for a rubber air spring, which can achieve energy conservation, precise temperature control, and better guarantee and improve the quality of the finished air spring. The specific scheme is as follows:

[0006] A rubber air spring electromagnetic vulcanization mold comprises a mold assembly connected to an air spring vulcanizer, the mold assembly comprises an upper mold, a middle mold and a lower mold of a cylindrical structure, an upper seat is provided on the top of the upper mold, the upper seat is connected to a downward pressing mechanism of the vulcanizer, the mold assembly is coaxially arranged with a center rod of the vulcanizer, epoxy resin is coated on the outer periphery of the upper mold, an electromagnetic coil is wound on the outer side of the epoxy resin, an insulation layer is provided on the outer side of the electromagnetic coil, an aluminum magnetic shield layer is provided on the outer side of the insulation layer, an electromagnetic coil heating mechanism is provided on one side of the air spring vulcanizer, a temperature sensor is installed on the socket of the mold assembly, and the electromagnetic coil heating mechanism and the temperature sensor are both connected to a controller.

[0007] Furthermore, the upper mold and the middle mold are fixedly connected by bolts.

[0008] Furthermore, the thermal insulation layer is made of nano aerogel.

[0009] Furthermore, temperature sensors are installed in the holes of the upper mold, the middle mold and the lower mold.

[0010] Furthermore, the lower end surface of the upper mold and the upper end surface of the middle mold both have burrs, and a gap can be formed when they are embedded.

[0011] The beneficial effects of the utility model are:

[0012] Compared with the steam vulcanization process in the prior art, the air spring processed by the electromagnetic vulcanization mold of the utility model can save more than 50% of energy, realize precise temperature control, better guarantee and improve the quality of the finished product, and has good technical and economic effects. Specifically, when the electromagnetic coil heating mechanism is energized, the mold assembly can generate heat quickly, and the temperature sensor thereon enables the temperature of each section to be accurately controlled, and the nanogel insulation layer provided can prevent temperature loss, further improve the utilization rate of electric heat, reduce the processing time of the air spring, thereby directly reducing the energy consumption, and has good practicality and good economic effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side sectional view of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the utility model.

[0015] Figure 3 This is a comparison chart of the temperature control curves of traditional steam vulcanization and electromagnetic vulcanization.

[0016] Wherein: upper mold 1, middle mold 2, lower mold 3, epoxy resin 4, electromagnetic coil 5, aluminum shield magnetic layer 6, temperature sensor 7, upper seat 8, insulation layer 9, center rod 10. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] See also Figure 1-3A rubber air spring electromagnetic vulcanization mold comprises a mold assembly connected to an air spring vulcanizer, the mold assembly comprises an upper mold 1, a middle mold 2 and a lower mold 3 of a cylindrical structure, an upper seat 8 is provided on the top of the upper mold 1 and is detachably connected, the upper seat 8 is connected to the downward pressing mechanism of the vulcanizer, the mold assembly is coaxially arranged with a center rod 10 of the vulcanizer, a lower base is provided on the lower side of the vulcanizer, and the center rod 10 is vertically arranged on the lower base, epoxy resin 4 is coated on the outer periphery of the upper mold 1, the middle mold 2 and the lower mold 3, an electromagnetic coil 5 is wound on the outer side of the epoxy resin 4, an insulating layer 9 is provided on the outer side of the electromagnetic coil 5, an aluminum magnetic shield layer 6 is provided on the outer side of the insulating layer 9, an electromagnetic coil 5 heating mechanism is provided on one side of the air spring vulcanizer, a temperature sensor 7 is installed on the jack of the mold assembly, the function of the temperature sensor 7 is to accurately monitor the temperature during induction heating, and the electromagnetic coil 5 heating mechanism and the temperature sensor 7 are both connected to the controller.

[0019] Preferably, the upper mold 1 and the middle mold 2 are fixedly connected by bolts to facilitate disassembly and maintenance.

[0020] The preferred thermal insulation layer 9 is made of nano-aerogel, and other thermal insulation materials with good thermal insulation performance may also be used.

[0021] Preferably, the upper mold 1 , the middle mold 2 and the lower mold 3 are all provided with temperature sensors 7 through holes.

[0022] Preferably, the lower end surface of the upper mold 1 and the upper end surface of the middle mold 2 are both provided with burrs, which can form a gap when embedded, so that a large amount of hot air generated inside the mold assembly when the electromagnetic coil 5 is heated can be discharged from the gap.

[0023] Working principle: First, manually load the air spring embryo to be vulcanized into the lower mold 3, then press the start button on the vulcanizer, the vulcanizer will automatically close the mold, when the mold is in place and the mold pressure reaches the set pressure value, vulcanization begins, the electromagnetic coil 5 of the three-stage mold simultaneously emits an alternating magnetic field, and the three-stage mold is electromagnetically heated. The heating time and constant temperature time are closed-loop controlled by the temperature sensor 7 and the controller. After the vulcanization time is up, the vulcanizer releases pressure and automatically opens the mold, and the vulcanized rubber air spring product can be manually taken out. This mold and heating method solves the problems of slow temperature rise and large temperature difference in the traditional steam hot plate or steam mold sleeve heat transfer heating method of the mold; the electromagnetic heating method can make the mold heat up quickly, the temperature of each section is accurately controlled, and the electric heat conversion efficiency is high.

[0024] It is also noted that during the vulcanization process of the air spring, the temperature rise stage after power is turned on is 2 minutes, and the load rate is generally 92%; the constant temperature stage is 8 minutes, and the load rate is generally 35%; the vulcanization process temperature setting value is 170C°±3C°, traditional steam vulcanization can only be controlled within ±3C°, while this technology can be controlled within ±1C°, and the temperature can be accurately controlled.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rubber air spring electromagnetic vulcanization mold, characterized in that: The invention comprises a mold assembly connected to an air spring vulcanizer, wherein the mold assembly comprises an upper mold (1), a middle mold (2) and a lower mold (3) of a cylindrical structure, an upper seat (8) is provided on the top of the upper mold (1), and the upper seat (8) is connected to a downward pressing mechanism of the vulcanizer, the mold assembly is coaxially arranged with a center rod (10) of the vulcanizer, epoxy resin (4) is applied on the outer periphery of the upper mold (1), the middle mold (2) and the lower mold (3), an electromagnetic coil (5) is wound on the outer side of the epoxy resin (4), an insulating layer (9) is provided on the outer side of the electromagnetic coil (5), and an aluminum magnetic shield layer (6) is provided on the outer side of the insulating layer (9), an electromagnetic coil (5) heating mechanism is provided on one side of the air spring vulcanizer, a temperature sensor (7) is installed on the socket of the mold assembly, and the electromagnetic coil (5) heating mechanism and the temperature sensor (7) are both connected to a controller.

2. The electromagnetic vulcanization mold for rubber air spring according to claim 1, characterized in that: The upper mold (1) and the middle mold (2) are fixedly connected by bolts.

3. The electromagnetic vulcanization mold for rubber air spring according to claim 1, characterized in that: The thermal insulation layer (9) is made of nano aerogel.

4. The electromagnetic vulcanization mold for rubber air spring according to claim 1, characterized in that: The upper mold (1), the middle mold (2) and the lower mold (3) are all provided with temperature sensors (7) through holes.

5. The electromagnetic vulcanization mold for rubber air spring according to claim 1, characterized in that: The lower end surface of the upper mold (1) and the upper end surface of the middle mold (2) both have burrs, and a gap can be formed when they are embedded.

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