A double-layer mold heating apparatus

Abstract

The utility model relates to mould heating equipment technical field especially relates to a kind of double-layer mould heating equipment, comprising: rack;Upper heating disc, fixedly arranged on the rack;Lower heating disc, movably arranged on rack and located below upper heating disc;Lifting drive device, connected with lower heating disc, for driving lower heating disc moves along vertical direction;Middle heating disc, between upper heating disc and the lower heating disc, heating element is provided in the middle heating disc, and the upper heating disc, the middle heating disc and the lower heating disc are pairwise parallel arrangement;Guiding mechanism, between the middle heating disc and the rack, and / or between the middle heating disc and the upper heating disc, the lower heating disc is arranged, for guiding middle heating disc moves along vertical direction;Elastic biasing mechanism, between middle heating disc and upper heating disc and between middle heating disc and lower heating disc, for exerting elastic force to middle heating disc.

Description

Technical Field

[0001] This utility model relates to the technical field of mold heating equipment, and in particular to a double-layer mold heating equipment. Background Technology

[0002] In the compression molding and vulcanization process of products such as rubber seals, upper and lower heating plates are typically used to heat and pressurize a single mold, causing the rubber material inside the mold to vulcanize and solidify. Existing mold heating equipment generally includes a frame, an upper heating plate fixedly installed above the frame, and a lower heating plate that is lifted and lowered by a cylinder. In use, a single mold is placed on the lower heating plate, and the cylinder pushes the lower heating plate upward, causing the mold to come into contact with the upper heating plate. The mold is heated simultaneously by the upper and lower heating plates to complete the vulcanization process. This type of equipment has a simple structure and is easy to operate, and is widely used in the rubber products industry.

[0003] However, the existing equipment can only process one set of molds at a time, resulting in low production efficiency. If two sets of molds need to be processed simultaneously, it is usually necessary to increase the number of equipment or use a large multi-layer press. The former increases equipment costs and floor space, while the latter has a complex structure and high cost. In addition, the contact pressure between the upper and lower heating plates and the mold in the existing equipment depends on the rigid drive of the cylinder. When there are thickness tolerances or flatness errors in the mold, it is easy to cause poor local contact, affecting heating uniformity and product quality. At the same time, traditional equipment lacks independent temperature control and floating support design for the central heating plate, making it difficult to meet the requirements for temperature uniformity and adaptive pressure adjustment when processing two sets of molds simultaneously. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a double-layer mold heating device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A double-layer mold heating device, comprising:

[0007] frame;

[0008] The upper heating plate is fixedly mounted on the frame;

[0009] The lower heating plate is movably mounted on the frame and located below the upper heating plate;

[0010] A lifting drive device, connected to the lower heating plate, is used to drive the lower heating plate to move vertically.

[0011] A middle heating plate is disposed between the upper heating plate and the lower heating plate. A heating element is disposed in the middle heating plate, and the upper heating plate, the middle heating plate and the lower heating plate are arranged in parallel to each other.

[0012] A guiding mechanism is disposed between the middle heating plate and the frame, and / or between the middle heating plate and the upper heating plate and the lower heating plate, for guiding the middle heating plate to move in the vertical direction;

[0013] An elastic biasing mechanism is disposed between the middle heating plate and the upper heating plate, and between the middle heating plate and the lower heating plate, for applying an elastic force to the middle heating plate;

[0014] The lifting drive device is used to drive the lower heating plate to rise, so that the mold placed on the lower heating plate abuts against the middle heating plate and pushes the middle heating plate to rise until the mold placed on the middle heating plate abuts against the upper heating plate.

[0015] Furthermore, the rack includes:

[0016] Base plate;

[0017] Multiple support pillars are vertically and fixedly installed on the upper surface of the base plate;

[0018] The top plate is arranged parallel to the bottom plate above it and is fixedly connected to the top of the multiple support columns.

[0019] Furthermore, the lifting drive device is a cylinder, which is fixedly installed on the upper end surface of the base plate. The cylinder has a piston rod that extends and retracts in the vertical direction, and the end of the piston rod is fixedly connected to the lower heating plate.

[0020] Furthermore, the upper heating plate is fixedly installed on the lower end face of the top plate.

[0021] Furthermore, the guiding mechanism includes:

[0022] Multiple first guide rods pass vertically through the top plate and the upper heating plate, respectively, and slide in cooperation with the top plate and the upper heating plate. The lower end of each first guide rod is fixedly connected to the upper end face of the middle heating plate.

[0023] Multiple second guide rods are vertically fixed to the lower end face of the middle heating plate, and the lower end of each second guide rod passes through the lower heating plate and slides in cooperation with the lower heating plate.

[0024] Furthermore, the elastic biasing mechanism includes:

[0025] Multiple first elastic elements are fitted onto each of the first guide rods in a corresponding manner. One end of each first elastic element abuts against the upper end face of the middle heating plate, and the other end abuts against the lower end face of the upper heating plate.

[0026] Multiple second elastic elements are fitted onto each of the second guide rods in a corresponding manner. One end of each second elastic element abuts against the lower end face of the middle heating plate, and the other end abuts against the upper end face of the lower heating plate.

[0027] Furthermore, it also includes bolt and nut assemblies;

[0028] The upper and lower surfaces of the heating plate are provided with multiple mounting slots, and a nut is fixedly installed in each mounting slot.

[0029] After the bolt in the bolt and nut assembly passes through the top plate and the upper heating plate, it is threadedly connected to the nut on the upper end face of the middle heating plate. This is used to fix the middle heating plate and the upper heating plate together after the mold on the middle heating plate abuts against the upper heating plate, driven by the lifting drive device.

[0030] Another bolt in the bolt and nut assembly passes through the lower heating plate and is threadedly connected to the nut on the lower end face of the middle heating plate. This is used to fix the middle heating plate and the lower heating plate together after the lifting drive device drives the lower heating plate to rise to the mold on the middle heating plate and abut against the upper heating plate.

[0031] Furthermore, the heating plate includes an upper heating layer, a lower heating layer, and a heat insulation layer disposed between the upper heating layer and the lower heating layer; the heating element includes a first heating element disposed in the upper heating layer and a second heating element disposed in the lower heating layer.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] Compared with existing technologies, the double-layer mold heating equipment provided by this utility model can achieve simultaneous heating and processing of two sets of molds without increasing the number of equipment or using large multi-layer presses. This significantly reduces equipment purchase costs and floor space while improving production efficiency, making it suitable for large-scale production needs. The heating element is installed in the middle heating plate and adopts a layered independent temperature control design. Combined with the upper and lower heating plates, this achieves uniform heating of both sets of molds. The elastic biasing mechanism can adaptively compensate for mold thickness tolerances and flatness errors, avoiding poor local contact and ensuring consistent temperature and pressure across all parts of the mold, significantly improving the quality of product vulcanization. The guide mechanism ensures smooth lifting and lowering of the middle and lower heating plates, preventing deviation and tilting. The temperature of each heating plate and the elastic force of the elastic bias mechanism can be adjusted according to the vulcanization requirements of different molds, adapting to the processing of rubber products with different specifications and process requirements. The overall structure is reasonably designed, easy to disassemble and maintain, and operators can quickly get started without professional training, reducing labor costs. Bolt and nut assemblies can be added according to actual needs, balancing stability and convenience. Meanwhile, the layered insulation design of the middle heating plate reduces heat transfer loss, and simultaneous processing of two sets of molds significantly reduces the energy consumption per unit product, meeting the requirements of energy-saving and environmentally friendly production. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the first structure of the double-layer mold heating device proposed in this utility model;

[0035] Figure 2 This is a schematic diagram of the second structure of the double-layer mold heating device proposed in this utility model;

[0036] Figure 3 This is a cross-sectional view of the heating plate in the double-layer mold heating device proposed in this utility model;

[0037] Figure 4 This is a schematic diagram of the bolt and nut assembly in the double-layer mold heating device proposed in this utility model.

[0038] In the diagram: 1-base plate, 2-support column, 3-cylinder, 4-top plate, 5-upper heating plate, 6-middle heating plate, 61-first heating element, 62-second heating element, 63-insulation layer, 64-mounting groove, 7-lower heating plate, 8-first guide rod, 9-first elastic element, 10-second guide rod, 11-second elastic element, 12-bolt and nut assembly, 121-bolt, 122-nut. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0040] like Figures 1-4 As shown, this embodiment provides a double-layer mold heating device, including:

[0041] frame;

[0042] The upper heating plate 5 is fixedly mounted on the frame;

[0043] The lower heating plate 7 is movably mounted on the frame and located below the upper heating plate 5;

[0044] A lifting drive device is connected to the lower heating plate 7 and is used to drive the lower heating plate 7 to move in the vertical direction;

[0045] A middle heating plate 6 is disposed between the upper heating plate 5 and the lower heating plate 7. A heating element is disposed inside the middle heating plate 6, and the upper heating plate 5, the middle heating plate 6 and the lower heating plate 7 are arranged in parallel pairs.

[0046] A guiding mechanism is provided between the middle heating plate 6 and the frame, and / or between the middle heating plate 6 and the upper heating plate 5 and the lower heating plate 7, for guiding the middle heating plate 6 to move in the vertical direction;

[0047] An elastic biasing mechanism is disposed between the middle heating plate 6 and the upper heating plate 5 and between the middle heating plate 6 and the lower heating plate 7, for applying an elastic force to the middle heating plate 6;

[0048] The lifting drive device is used to drive the lower heating plate 7 to rise, so that the mold placed on the lower heating plate 7 abuts against the middle heating plate 6 and pushes the middle heating plate 6 to rise until the mold placed on the middle heating plate 6 abuts against the upper heating plate 5.

[0049] The rack includes:

[0050] Base plate 1;

[0051] Multiple support pillars 2 are vertically fixedly installed on the upper surface of the base plate 1;

[0052] The top plate 4 is arranged parallel above the bottom plate 1 and is fixedly connected to the top of the multiple support columns 2.

[0053] The lifting drive device is a cylinder 3, which is fixedly installed on the upper surface of the base plate 1. The cylinder 3 has a piston rod that extends and retracts in the vertical direction, and the end of the piston rod is fixedly connected to the lower heating plate 7.

[0054] The upper heating plate 5 is fixedly installed on the lower end face of the top plate 4.

[0055] The guiding mechanism includes:

[0056] Multiple first guide rods 8 pass vertically through the top plate 4 and the upper heating plate 5 respectively, and slide in cooperation with the top plate 4 and the upper heating plate 5. The lower end of each first guide rod 8 is fixedly connected to the upper end face of the middle heating plate 6.

[0057] Multiple second guide rods 10 are vertically fixedly installed on the lower end face of the middle heating plate 6, and the lower end of each second guide rod 10 passes through the lower heating plate 7 and slides in cooperation with the lower heating plate 7.

[0058] The elastic biasing mechanism includes:

[0059] Multiple first elastic elements 9 are fitted onto each of the first guide rods 8 in a corresponding manner. One end of each first elastic element 9 abuts against the upper end face of the middle heating plate 6, and the other end abuts against the lower end face of the upper heating plate 5.

[0060] Multiple second elastic elements 11 are fitted onto each of the second guide rods 10 in a corresponding manner. One end of each second elastic element 11 abuts against the lower end face of the middle heating plate 6, and the other end abuts against the upper end face of the lower heating plate 7.

[0061] The heating plate 6 includes an upper heating layer, a lower heating layer, and a heat insulation layer 63 disposed between the upper heating layer and the lower heating layer; the heating element includes a first heating element 61 disposed in the upper heating layer and a second heating element 62 disposed in the lower heating layer.

[0062] Based on the core technical solution, this embodiment provides specific limitations on the rack structure as follows:

[0063] The frame includes a base plate 1, multiple support columns 2, and a top plate 4. The multiple support columns 2 are vertically fixedly installed on the upper surface of the base plate 1. The support columns 2 are preferably made of high-strength metal to ensure the overall rigidity of the frame and prevent deformation during the heating process. The top plate 4 is arranged parallel to the base plate 1 and is fixedly connected to the top of the multiple support columns 2. The top plate 4 is arranged parallel to the base plate 1 to ensure that the installation reference of the upper heating plate 5, the middle heating plate 6, and the lower heating plate 7 is consistent and that the three are parallel to each other.

[0064] Furthermore, the upper heating plate 5 is fixedly installed on the lower end face of the top plate 4 using bolts 121 for easy disassembly and maintenance. A heat insulation pad can be installed between the upper heating plate 5 and the top plate 4 to reduce the heat transfer from the upper heating plate 5 to the top plate 4, thereby reducing energy loss and protecting the frame structure.

[0065] The lifting drive device is a cylinder 3, which is fixedly installed on the upper end face of the base plate 1. The cylinder body of the cylinder 3 is fixed to the base plate 1 by bolts 121 to ensure a firm installation. The cylinder 3 has a piston rod that extends and retracts in the vertical direction. The end of the piston rod is fixedly connected to the lower heating plate 7. The piston rod and the lower heating plate 7 are connected by a flange to ensure connection stability. The cylinder 3 drives the lower heating plate 7 to rise and fall smoothly in the vertical direction to realize the pressurization and release of the mold.

[0066] The guiding mechanism is located between the middle heating plate 6 and the upper heating plate 5 and lower heating plate 7, specifically including multiple first guide rods 8 and multiple second guide rods 10. The multiple first guide rods 8 pass vertically through the top plate 4 and the upper heating plate 5, and slide in cooperation with the top plate 4 and the upper heating plate 5. The lower end of each first guide rod 8 is fixedly connected to the upper end face of the middle heating plate 6. A linear bearing is provided at the joint between the first guide rod 8 and the top plate 4 and the upper heating plate 5 to reduce sliding friction and ensure the smoothness of the rise and fall of the middle heating plate 6. The multiple second guide rods 10 are vertically fixedly installed on the lower end face of the middle heating plate 6. The lower end of each second guide rod 10 passes through the lower heating plate 7 and slides in cooperation with the lower heating plate 7. A linear bearing is also provided at the joint between the second guide rod 10 and the lower heating plate 7 to further improve guiding accuracy, prevent the middle heating plate 6 from shifting or tilting during movement, and ensure that the middle heating plate 6 and the upper and lower heating plates 7 always remain parallel.

[0067] The elastic biasing mechanism includes multiple first elastic elements 9 and multiple second elastic elements 11. The multiple first elastic elements 9 are correspondingly sleeved on each of the first guide rods 8, with one end of each first elastic element 9 abutting against the upper end face of the middle heating plate 6 and the other end abutting against the lower end face of the upper heating plate 5. The multiple second elastic elements 11 are correspondingly sleeved on each of the second guide rods 10, with one end of each second elastic element 11 abutting against the lower end face of the middle heating plate 6 and the other end abutting against the upper end face of the lower heating plate 7. Both the first elastic elements 9 and the second elastic elements 11 are preferably compression springs, and the elastic coefficient of the springs can be adjusted according to actual processing requirements to ensure that the elastic force can adapt to the mold thickness tolerance and flatness error, and realize adaptive pressure adjustment.

[0068] The heating plate 6 includes an upper heating layer, a lower heating layer, and a heat insulation layer 63 disposed between the upper heating layer and the lower heating layer. The heating elements include a first heating element 61 disposed in the upper heating layer and a second heating element 62 disposed in the lower heating layer. Both the first heating element 61 and the second heating element 62 are electric heating tubes, which are evenly distributed in the corresponding heating layers to ensure heating uniformity. The heat insulation layer 63 is made of high-temperature resistant heat insulation material to avoid heat transfer between the upper heating layer and the lower heating layer, and to achieve independent temperature control of the upper and lower surfaces of the heating plate 6. The temperature of the upper heating layer and the lower heating layer can be adjusted separately according to the different vulcanization requirements of the two sets of molds to improve product adaptability.

[0069] In use, first place the two sets of molds to be processed on the upper end face of the lower heating plate 7 and the upper end face of the middle heating plate 6 respectively. Start the equipment, and the cylinder 3 drives the piston rod to extend, causing the lower heating plate 7 to move upward. During the rise of the lower heating plate 7, the mold on its upper end face first abuts against the lower end face of the middle heating plate 6. As the lower heating plate 7 continues to rise, the mold pushes the middle heating plate 6 upward. The first guide rod 8 slides along the top plate 4 and the upper heating plate 5, and the second guide rod 10 slides along the lower heating plate 7 to ensure that the middle heating plate 6 rises smoothly. At the same time, the first elastic element 9 is compressed and the second elastic element 11 is stretched (or compressed, adjusted according to the initial state). The elastic force generated by the elastic elements acts on the middle heating plate 6, keeping the middle heating plate 6 in close contact with the mold on the lower heating plate 7. When the middle heating plate 6 rises to the point where the mold on its upper end face abuts against the upper heating plate 6, the mold on the lower heating plate 7 moves upward. When the lower end face of the heating plate 5 abuts, the cylinder 3 continues to apply pressure. At this time, the elastic force of the first elastic element 9 and the second elastic element 11 is further adjusted to adaptively compensate for the mold thickness tolerance and flatness error, so that the three heating plates and the two molds are tightly fitted. Then, the heating elements in the upper heating plate 5 and the middle heating plate 6 are activated. The upper heating plate 5 heats the mold on the middle heating plate 6, and the upper heating layer of the middle heating plate 6 assists in heating the mold. The lower heating layer of the middle heating plate 6 heats the mold on the lower heating plate 7, and the lower heating plate 7 assists in heating the mold. Through independent temperature control and elastic pressure, it is ensured that the two molds reach the qualified vulcanization temperature and pressure simultaneously. After the vulcanization process is completed, the cylinder 3 drives the piston rod to retract, the lower heating plate 7 descends, and the middle heating plate 6 is reset under the action of the elastic element. The processed mold can then be removed.

[0070] By achieving simultaneous processing of two mold layers, the traditional single-set mold processing is upgraded to simultaneous processing of two sets of molds, significantly improving production efficiency without increasing the number of equipment or using large multi-layer presses, effectively reducing equipment costs and floor space. Its frame structure is simple and rigid. Through the cooperation of the base plate 1, support column 2, and top plate 4, the upper, middle, and lower heating plates 7 are ensured to be parallel to each other, providing structural assurance for heating uniformity. The cylinder 3 drive method is stable and reliable, facilitating control of the lifting speed and pressure of the lower heating plate 7. The guiding mechanism, through the cooperation of the first guide rod 8 and the second guide rod 10, combined with linear bearings, ensures the smooth lifting of the middle heating plate 6. The process is smooth, avoiding deviation and tilting, and ensuring the fitting accuracy between the mold and the heating plate; the elastic biasing mechanism realizes adaptive pressure adjustment through the elastic force of the first elastic element 9 and the second elastic element 11, which can compensate for mold thickness tolerance and flatness error, avoid poor local contact, and improve heating uniformity; the middle heating plate 6 adopts a layered design, and the heat insulation layer 63 realizes independent temperature control of the upper and lower heating layers. The temperature can be adjusted according to the different vulcanization requirements of the two sets of molds, adapting to products with different specifications and process requirements, improving the versatility of the equipment. The overall structure is simple, easy to operate, and convenient to disassemble and maintain, making it suitable for large-scale production in the rubber products industry.

[0071] like Figures 2-4 As shown, in this embodiment, a bolt and nut assembly 12 is also included;

[0072] The upper and lower surfaces of the heating plate 6 are provided with multiple mounting slots 64, and a nut 122 is fixedly installed in each mounting slot 64.

[0073] After the bolt 121 in the bolt and nut assembly 12 passes through the top plate 4 and the upper heating plate 5, it is threadedly connected to the nut 122 on the upper end face of the middle heating plate 6. This is used to fix the middle heating plate 6 and the upper heating plate 5 after the mold on the middle heating plate 6 is driven by the lifting drive device to rise to the upper heating plate 6 and abut against the upper heating plate 5.

[0074] Another bolt 121 in the bolt and nut assembly 12 passes through the lower heating plate 7 and is threadedly connected to the nut 122 on the lower end face of the middle heating plate 6. This is used to fix the middle heating plate 6 and the lower heating plate 7 together after the mold on the middle heating plate 6, driven by the lifting drive device, abuts against the upper heating plate 5.

[0075] Based on the above embodiments, this embodiment adds a bolt and nut assembly 12 to further optimize the stability and processing reliability of the equipment. The specific additional features are as follows:

[0076] The double-layer mold heating equipment also includes a bolt and nut assembly 12; the upper and lower ends of the middle heating plate 6 are provided with multiple mounting slots 64, and a nut 122 is fixedly installed in each mounting slot 64. The nut 122 and the mounting slot 64 are fixed by interference fit or welding to ensure a firm connection. The position of the mounting slot 64 corresponds to the position of the bolt 121, which facilitates the positioning of the bolt 121.

[0077] The bolt 121 in the bolt and nut assembly 12 passes through the top plate 4 and the upper heating plate 5, and is threadedly connected to the nut 122 on the upper end face of the middle heating plate 6. This connection is used to fix the middle heating plate 6 and the upper heating plate 5 together after the mold on the middle heating plate 6, driven by the lifting drive device, abuts against the upper heating plate 5. The other bolt 121 in the bolt and nut assembly 12 passes through the lower heating plate 7 and is threadedly connected to the nut 122 on the lower end face of the middle heating plate 6. This connection is used to fix the middle heating plate 6 and the lower heating plate 7 together after the mold on the middle heating plate 6, driven by the lifting drive device, abuts against the upper heating plate 5.

[0078] In this embodiment, the other structures are completely consistent with those in the above embodiments, and will not be repeated here.

[0079] The working process of this embodiment is basically the same as that of the above embodiment, except that: when the cylinder 3 drives the lower heating plate 7 to rise, so that the mold on the middle heating plate 6 abuts against the upper heating plate 5, and after the elastic bias mechanism completes the pressure adaptive adjustment, the operator passes the bolt 121 in the bolt and nut assembly 12 through the top plate 4 and the upper heating plate 5, and tightens it with the nut 122 on the upper end face of the middle heating plate 6 to fix the middle heating plate 6 and the upper heating plate 5; at the same time, another set of bolts 121 passes through the lower heating plate 7 and tightens it with the nut 122 on the lower end face of the middle heating plate 6 to fix the middle heating plate 6 and the lower heating plate 7; after the fixing is completed, the heating element is started to perform vulcanization processing. After the processing is completed, all bolts 121 are unscrewed first, and then the cylinder 3 is controlled to retract, so that the lower heating plate 7 and the middle heating plate 6 are reset, and the mold is taken out.

[0080] The bolt and nut assembly 12 can fix the middle heating plate 6 to the upper heating plate 5 and the lower heating plate 7 respectively after the mold reaches the predetermined fitting state and pressure. This avoids the middle heating plate 6 from shifting or the mold fitting from loosening due to pressure fluctuations in the cylinder 3 or equipment vibration during the vulcanization process, thus further improving processing stability. The fixed middle heating plate 6 and the upper and lower heating plates 7 form a stable overall structure, ensuring uniform pressure and stable temperature during the heating process, further improving the consistency of product vulcanization quality. Moreover, the bolt and nut assembly 12 is easy to disassemble and does not affect the normal operation and maintenance of the equipment, thus balancing stability and convenience.

[0081] like Figures 1-2 As shown, in this embodiment, based on the core technical solution, the setting method of the guiding mechanism is adjusted, and some structures are simplified to adapt to different installation scenarios, as detailed below:

[0082] The frame includes a base plate 1, multiple support columns 2 and a top plate 4, and its structure is completely consistent with the above embodiment; the upper heating plate 5 is fixedly installed on the lower end face of the top plate 4, and the lower heating plate 7 is driven to rise and fall by a cylinder 3, which is fixed on the upper end face of the base plate 1, and its structure is completely consistent with the above embodiment.

[0083] The guiding mechanism is located only between the middle heating plate 6 and the frame, and specifically includes multiple guide rods. The guide rods are vertically fixedly installed on the upper surface of the base plate 1, pass through the lower heating plate 7 and the middle heating plate 6, and slide in cooperation with the lower heating plate 7 and the middle heating plate 6. The top of the guide rod is fixedly connected to the top plate 4. Linear bearings are provided at the joints between the guide rods and the lower heating plate 7 and the middle heating plate 6 to ensure smooth sliding. Preferably, four guide rods are used and evenly distributed around the equipment to ensure guiding stability.

[0084] The elastic biasing mechanism is completely consistent with the above embodiment, including a first elastic element 9 and a second elastic element 11 sleeved on the guide rod. The first elastic element 9 is located between the middle heating plate 6 and the top plate 4, and the second elastic element 11 is located between the middle heating plate 6 and the lower heating plate 7, so as to realize the elastic support and pressure adaptive adjustment of the middle heating plate 6.

[0085] The structure of the heating plate 6 is completely consistent with that of the above embodiment, and it adopts a layered design to achieve independent temperature control.

[0086] In use, place the two sets of molds on the lower heating plate 7 and the middle heating plate 6 respectively. The cylinder 3 drives the lower heating plate 7 to rise, pushing the middle heating plate 6 to move upward along the guide rod until the mold on the middle heating plate 6 abuts against the upper heating plate 5. The elastic biasing mechanism generates elastic force during the movement to compensate for mold errors and ensure a tight fit. Then, the heating element is started to perform vulcanization. After the processing is completed, the cylinder 3 retracts, the lower heating plate 7 and the middle heating plate 6 return to their original positions along the guide rod, and the mold can be removed.

[0087] By simplifying the guide mechanism, the structure is made simpler, the number of guide rods is reduced, and the processing and assembly costs of the equipment are lowered. The guide rods pass through the lower heating plate 7 and the middle heating plate 6, and at the same time guide the lower heating plate 7 and the middle heating plate 6 to ensure that the lifting process of the two is synchronized and smooth, further improving the stability of equipment operation. After the structure is simplified, the disassembly and maintenance of the equipment are more convenient, adapting to the installation needs of small production workshops and reducing the equipment's footprint.

[0088] Of course, for those skilled in the art, this utility model is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model; therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of the equivalents of the claims are intended to be included in this utility model; no reference numerals in the claims should be regarded as limiting the claims involved.

[0089] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0090] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A double-layer mold heating device, characterized in that, include: frame; The upper heating plate (5) is fixedly mounted on the frame; The lower heating plate (7) is movably mounted on the frame and located below the upper heating plate (5); A lifting drive device is connected to the lower heating plate (7) and is used to drive the lower heating plate (7) to move in the vertical direction; The middle heating plate (6) is located between the upper heating plate (5) and the lower heating plate (7). The middle heating plate (6) is provided with a heating element, and the upper heating plate (5), the middle heating plate (6) and the lower heating plate (7) are arranged in parallel. A guiding mechanism is provided between the middle heating plate (6) and the frame, and / or between the middle heating plate (6) and the upper heating plate (5) and the lower heating plate (7), for guiding the middle heating plate (6) to move in the vertical direction; An elastic biasing mechanism is disposed between the middle heating plate (6) and the upper heating plate (5) and between the middle heating plate (6) and the lower heating plate (7), for applying an elastic force to the middle heating plate (6); The lifting drive device is used to drive the lower heating plate (7) to rise, so that the mold placed on the lower heating plate (7) abuts against the middle heating plate (6) and pushes the middle heating plate (6) to rise until the mold placed on the middle heating plate (6) abuts against the upper heating plate (5).

2. The double-layer mold heating device according to claim 1, characterized in that, The rack includes: Base plate (1); Multiple support pillars (2) are vertically fixed to the upper surface of the base plate (1); The top plate (4) is arranged parallel above the bottom plate (1) and is fixedly connected to the top of the multiple pillars (2).

3. The double-layer mold heating device according to claim 2, characterized in that, The lifting drive device is a cylinder (3), which is fixedly installed on the upper end face of the base plate (1). The cylinder (3) has a piston rod that extends and retracts in the vertical direction, and the end of the piston rod is fixedly connected to the lower heating plate (7).

4. The double-layer mold heating device according to claim 2, characterized in that, The upper heating plate (5) is fixedly installed on the lower end face of the top plate (4).

5. The double-layer mold heating device according to claim 2, characterized in that, The guiding mechanism includes: Multiple first guide rods (8) pass vertically through the top plate (4) and the upper heating plate (5) respectively, and slide in cooperation with the top plate (4) and the upper heating plate (5). The lower end of each first guide rod (8) is fixedly connected to the upper end face of the middle heating plate (6). Multiple second guide rods (10) are vertically fixedly installed on the lower end face of the middle heating plate (6), and the lower end of each second guide rod (10) passes through the lower heating plate (7) and slides with the lower heating plate (7).

6. The double-layer mold heating device according to claim 5, characterized in that, The elastic biasing mechanism includes: Multiple first elastic elements (9) are fitted onto each of the first guide rods (8) in a corresponding manner. One end of each first elastic element (9) abuts against the upper end face of the middle heating plate (6), and the other end abuts against the lower end face of the upper heating plate (5). Multiple second elastic elements (11) are fitted onto each of the second guide rods (10) in a corresponding manner. One end of each second elastic element (11) abuts against the lower end face of the middle heating plate (6), and the other end abuts against the upper end face of the lower heating plate (7).

7. The double-layer mold heating device according to claim 2, characterized in that, It also includes bolt and nut assembly (12); The upper and lower surfaces of the heating plate (6) are provided with multiple mounting slots (64), and a nut (122) is fixedly installed in each mounting slot (64). After the bolt (121) in the bolt and nut assembly (12) passes through the top plate (4) and the upper heating plate (5), it is threadedly connected to the nut (122) on the upper end face of the middle heating plate (6). This is used to fix the middle heating plate (6) and the upper heating plate (5) after the lower heating plate (7) is driven by the lifting drive device to rise to the mold on the middle heating plate (6) and abut against the upper heating plate (5). Another bolt (121) in the bolt and nut assembly (12) passes through the lower heating plate (7) and is threadedly connected to the nut (122) on the lower end face of the middle heating plate (6). This is used to fix the middle heating plate (6) and the lower heating plate (7) together after the lower heating plate (7) is raised by the lifting drive device to the mold on the middle heating plate (6) and abut against the upper heating plate (5).

8. The double-layer mold heating device according to claim 1, characterized in that, The heating plate (6) includes an upper heating layer, a lower heating layer, and a heat insulation layer (63) disposed between the upper heating layer and the lower heating layer; the heating element includes a first heating element (61) disposed in the upper heating layer and a second heating element (62) disposed in the lower heating layer.

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