Oven with heat insulation structure
By employing a composite insulation structure and a servo motor drive system in the preform oven, the problem of insufficient insulation performance was solved, achieving temperature uniformity and energy consumption optimization, and improving the stability and safety of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN SHENGYU PACKAGING MATERIALS CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-26
Smart Images
Figure CN224276158U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PET container production technology, specifically to a preform oven with a heat insulation structure. Background Technology
[0002] PET containers are produced by first creating preforms through injection molding, then softening them to an ideal temperature through infrared heating. Finally, high-pressure blow molding is used to stretch and expand the softened preforms into the desired transparent plastic packaging containers. These containers are lightweight, highly transparent, and offer excellent barrier properties, making them widely used in the packaging of beverages, food, and daily chemical products. In the PET container production process, the preform oven is responsible for precisely preheating the injection-molded preforms to the required blow molding temperature. Uniform heat transfer ensures the material reaches its optimal softening state. Its internal temperature-controlled zone design, combined with hot air circulation or infrared radiation technology, ensures that each preform is heated consistently during transport, providing a stable and reliable process foundation for subsequent high-pressure blow molding and directly impacting the final container's molding quality and production efficiency.
[0003] In the PET container manufacturing process, the insulation performance of the preform oven directly affects the overall process stability and energy efficiency. When heat cannot be effectively blocked, the surface temperature of the box will rise significantly, increasing the ambient temperature of the workshop and potentially posing safety hazards to operators. Secondly, excessive heat loss forces the heating system to operate at high power continuously to maintain the set temperature, significantly increasing energy costs and accelerating the aging of heating elements. More importantly, uneven heat distribution will cause deviations in the heating of the preform. Overheating in some areas may lead to changes in the material's crystallinity, while insufficiently heated areas will fail to soften adequately. Ultimately, the blow-molded container may exhibit problems such as uneven wall thickness, reduced transparency, or insufficient mechanical strength. Furthermore, frequent temperature fluctuations will prolong process debugging time, reduce production efficiency, and increase raw material waste due to higher defect rates.
[0004] To address the aforementioned issues, we have made improvements by proposing a preform oven with an insulated structure. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a preform oven with a heat insulation structure, including a base plate, an oven shell fixedly connected to the top of the base plate, a preheating box fixedly connected to the top of the oven shell, the oven shell including a basalt fiberboard base layer, an outer functional layer and an inner functional layer, the outer functional layer including a vacuum insulation board layer, a stainless steel plate layer and a nano-ceramic coating, the inner functional layer including a microporous calcium silicate board layer, an aerogel felt layer and a high-purity aluminum foil layer, the outer functional layer being disposed on the outside of the basalt fiberboard base layer, and the inner functional layer being disposed on the inside of the basalt fiberboard base layer.
[0006] Preferably, the vacuum insulation board layer is disposed on the outside of the basalt fiberboard base layer, the stainless steel plate layer is disposed on the outside of the vacuum insulation board layer, and the nano-ceramic coating is applied to the outside of the stainless steel plate layer.
[0007] Preferably, the microporous calcium silicate board layer is disposed on the inner side of the basalt fiberboard base layer, the aerogel felt layer is disposed on the inner side of the microporous calcium silicate board layer, and the high-purity aluminum foil layer is wrapped on the inner side of the aerogel felt layer.
[0008] Preferably, heat-insulating doors are movably connected to both sides of the front surface of the oven shell via hinges. A servo motor is fixedly connected to the left side of the back side of the oven shell. A screw is fixedly connected to the output end of the servo motor. A threaded sleeve is threaded onto the surface of the screw. A horizontal plate is fixedly connected to the right side of the threaded sleeve. A placement rack is fixedly connected to the top of the horizontal plate.
[0009] Preferably, a guide rod is fixedly connected to the right side of the bottom of the inner cavity of the oven shell, and a movable sleeve is slidably connected to the surface of the guide rod. The left side of the movable sleeve is fixedly connected to the back side of the right side of the horizontal plate.
[0010] Preferably, the left and right sides of the bottom of the inner cavity of the oven shell are fixedly connected to sliding grooves, and the bottom of the screw sleeve and the bottom of the movable sleeve are fixedly connected to sliders, the bottom of the sliders being slidably connected to the inner cavity of the sliding grooves.
[0011] Compared with the prior art, the present invention provides a preform oven with a heat insulation structure, which has the following beneficial effects:
[0012] 1. This preform oven with a heat-insulating structure features an outer functional layer consisting of a basalt fiberboard base layer, a vacuum insulation board layer, a stainless steel plate layer, and a nano-ceramic coating, and an inner functional layer consisting of a microporous calcium silicate board layer, an aerogel felt layer, and a high-purity aluminum foil layer. The basalt fiberboard base layer maintains dimensional stability at high temperatures due to its mineral fiber structure, and its compressive strength supports the multi-layered composite structure without deformation. Its corrosion resistance makes it suitable for the humid and acidic environment of PET production, ensuring long-term reliability. The vacuum insulation board layer virtually eliminates heat transfer through gas molecules in a vacuum environment, forming a near-absolute barrier against conduction and convection. Especially for easily heat-dissipating areas such as the oven's outer wall, it reduces the outer shell temperature to a safe range, significantly reducing environmental heat pollution. The stainless steel plate layer combines mechanical strength and weather resistance, resisting impacts and chemical corrosion in the production environment. Its low surface emissivity reduces the interference of external temperature fluctuations on the internal insulation layer, facilitates quick cleaning, and maintains a clean appearance. The nano-ceramic coating, through a dense protective layer formed by ceramic particles, further enhances the heat-insulating effect. Scattering residual thermal radiation and supplementing the small amount of heat energy blocked by conduction, the hardened surface reduces scratch damage during equipment maintenance and extends the service life of the insulation system. The microporous calcium silicate board layer provides physical protection and disrupts the direction of heat flow through uniformly distributed micropores, dispersing longitudinal heat transfer. Its lightweight characteristics avoid additional load on the equipment structure while maintaining the overall compactness of the insulation system. The aerogel felt layer forms an extremely low thermal conductivity barrier through its unique nanoporous structure, effectively blocking the heat conduction path. Its flexibility perfectly fits curved surfaces, eliminating heat leakage points caused by seams in traditional rigid materials, and improving the overall continuity of insulation. The high-purity aluminum foil layer efficiently reflects the infrared radiation from the heating zone back into the oven shell through the mirror reflection principle, significantly reducing the loss of heat energy transferred to the insulation layer in the form of radiation. At the same time, its metallic properties ensure long-term stability in high-temperature environments and avoid performance degradation caused by oxidation. Through the cooperation of the basalt fiberboard base layer, the outer functional layer, and the inner functional layer, the whole system achieves energy optimization and long-term stable operation while maintaining high-temperature uniformity.
[0013] 2. This preform oven with a heat insulation structure uses a servo motor to drive a screw to rotate. During rotation, the screw moves the screw sleeve forward, which in turn moves the horizontal plate forward, pushing the placement rack out of the oven's outer cavity. This facilitates the loading and unloading of materials and improves overall safety during operation. The guide rod and movable sleeve effectively enhance the stability of the horizontal plate during forward and backward movement. Furthermore, the slider and slide groove effectively improve the stability of the screw sleeve and movable sleeve during forward and backward movement. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 3 This is a top view of the cross-sectional structure of the oven shell of this utility model;
[0018] Figure 4 This is a cross-sectional structural diagram of the outer functional layer of this utility model;
[0019] Figure 5 This is a cross-sectional structural diagram of the inner functional layer of this utility model.
[0020] The components include: 1. Base plate; 2. Oven shell; 201. Basalt fiberboard base layer; 202. Outer functional layer; 2021. Vacuum insulation board layer; 2022. Stainless steel plate layer; 2023. Nano-ceramic coating; 203. Inner functional layer; 2031. Microporous calcium silicate board layer; 2032. Aerogel felt layer; 2033. High-purity aluminum foil layer; 3. Preheating box; 4. Insulated box door; 5. Servo motor; 6. Screw; 7. Screw sleeve; 8. Horizontal plate; 9. Guide rod; 10. Movable sleeve; 11. Slider; 12. Slide groove; 13. Placement rack. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-5A preform oven with a heat-insulating structure includes a base plate 1, an oven shell 2 fixedly connected to the top of the base plate 1, and a preheating box 3 fixedly connected to the top of the oven shell 2. The oven shell 2 includes a basalt fiberboard base layer 201, an outer functional layer 202, and an inner functional layer 203. The outer functional layer 202 includes a vacuum insulation board layer 2021, a stainless steel plate layer 2022, and a nano-ceramic coating 2023. The inner functional layer 203 includes a microporous calcium silicate board layer 2031, an aerogel felt layer 2032, and a high-purity aluminum foil layer 2033. The outer functional layer 202 is disposed on the basalt fiberboard base layer. On the outside of 201, the inner functional layer 203 is disposed on the inner side of the basalt fiberboard base layer 201, the vacuum insulation board layer 2021 is disposed on the outside of the basalt fiberboard base layer 201, the stainless steel board layer 2022 is disposed on the outside of the vacuum insulation board layer 2021, the nano-ceramic coating 2023 is coated on the outside of the stainless steel board layer 2022, the microporous calcium silicate board layer 2031 is disposed on the inner side of the basalt fiberboard base layer 201, the aerogel felt layer 2032 is disposed on the inner side of the microporous calcium silicate board layer 2031, and the high-purity aluminum foil layer 2033 is wrapped on the inner side of the aerogel felt layer 2032.
[0023] Through the above technical solutions, the basalt fiberboard base layer 201 maintains dimensional stability at high temperatures due to its mineral fiber structure, and its compressive strength can support the multi-layer composite structure without deformation. Simultaneously, its corrosion resistance is suitable for the humid and acidic environment of PET production, ensuring long-term reliability. The vacuum insulation layer 2021 virtually eliminates gas molecule heat transfer in a vacuum environment, forming a near-absolute barrier against conduction and convection. Especially for easily heat-dissipating areas such as the two side walls of the oven shell, it can reduce the shell temperature to a safe range, significantly reducing environmental heat pollution. The stainless steel layer 2022 combines mechanical strength and weather resistance, resisting collisions and chemical corrosion in the production environment. Its low surface emissivity reduces the interference of external temperature fluctuations on the internal insulation layer, facilitates quick cleaning, and maintains a clean equipment appearance. The nano-ceramic coating 2023, through a dense protective layer formed by ceramic particles, further scatters residual heat radiation, supplementing the small amount of heat energy blocked by conduction. The hardened surface reduces scratch damage during equipment maintenance and extends the insulation period. Extending the overall service life, the microporous calcium silicate board layer 2031 provides physical protection and disrupts the heat flow direction through uniformly distributed micropores, dispersing longitudinal heat transfer. Its lightweight characteristics avoid additional load on the equipment structure while maintaining the overall compactness of the insulation system. The aerogel felt layer 2032 forms an extremely low thermal conductivity barrier through its unique nanoporous structure, effectively blocking heat conduction paths. Its flexibility perfectly fits curved surfaces, eliminating heat leakage points caused by seams in traditional rigid materials, thus improving the overall insulation continuity. The high-purity aluminum foil layer 2033 efficiently reflects the infrared radiation from the heating zone back into the oven shell 2 through the mirror reflection principle, significantly reducing the loss of heat energy transferred to the insulation layer in the form of radiation. At the same time, its metallic properties ensure long-term stability in high-temperature environments and avoid performance degradation caused by oxidation. Through the cooperation of the basalt fiberboard base layer 201, the outer functional layer 202, and the inner functional layer 203, the overall system achieves energy optimization and long-term stable operation while maintaining high-temperature uniformity.
[0024] Specifically, the left and right sides of the front surface of the oven shell 2 are hinged to insulated doors 4. A servo motor 5 is fixedly connected to the left side of the back side of the oven shell 2. A screw 6 is fixedly connected to the output end of the servo motor 5. A screw sleeve 7 is threadedly connected to the surface of the screw 6. A horizontal plate 8 is fixedly connected to the right side of the screw sleeve 7. A placement rack 13 is fixedly connected to the top of the horizontal plate 8. A guide rod 9 is fixedly connected to the right side of the bottom of the oven shell 2. A movable sleeve 10 is slidably connected to the surface of the guide rod 9. The left side of the movable sleeve 10 is fixedly connected to the back side of the right side of the horizontal plate 8. Slide grooves 12 are fixedly connected to the left and right sides of the bottom of the oven shell 2. A slider 11 is fixedly connected to the bottom of the screw sleeve 7 and the bottom of the movable sleeve 10. The bottom of the slider 11 is slidably connected to the inner cavity of the slide groove 12.
[0025] Through the above technical solution, the output end of the servo motor 5 drives the screw 6 to rotate. During the rotation of the screw 6, the screw sleeve 7 moves forward, and the screw sleeve 7 moves the horizontal plate 8 forward, pushing the placement rack 13 out of the inner cavity of the oven shell 2. This facilitates the loading and unloading of materials, thereby improving the overall safety during operation. By setting the guide rod 9 and the movable sleeve 10, the stability of the horizontal plate 8 during the forward and backward movement can be effectively improved. By setting the slider 11 and the slide groove 12, the stability of the screw sleeve 7 and the movable sleeve 10 during the forward and backward movement can be effectively improved.
[0026] During use, the basalt fiberboard base layer 201 maintains dimensional stability at high temperatures due to its mineral fiber structure. Its compressive strength supports the multi-layered composite structure without deformation. Simultaneously, its corrosion resistance makes it suitable for the humid and acidic environment of PET production, ensuring long-term reliability. The vacuum insulation layer 2021 virtually eliminates heat transfer through gas molecules in a vacuum environment, forming a near-absolute barrier against conduction and convection. Especially for easily heat-dissipating areas such as the two side walls of the oven shell, it can reduce the shell temperature to a safe range, significantly reducing environmental heat pollution. The stainless steel layer 2022 combines mechanical strength and weather resistance, resisting impacts and chemical corrosion in the production environment. Its low surface emissivity reduces the interference of external temperature fluctuations on the internal insulation layer, facilitates quick cleaning, and maintains a clean equipment appearance. The nano-ceramic coating 2023, through a dense protective layer formed by ceramic particles, further scatters residual heat radiation, supplementing the small amount of heat energy blocked by conduction. The hardened surface reduces scratch damage during equipment maintenance, extending the lifespan of the insulation system. For longevity, the microporous calcium silicate board layer 2031 provides physical protection and disrupts the heat flow direction through uniformly distributed micropores, dispersing longitudinal heat transfer; its lightweight characteristics avoid additional load on the equipment structure while maintaining the overall compactness of the insulation system. The aerogel felt layer 2032 forms an extremely low thermal conductivity barrier through its unique nanoporous structure, effectively blocking the heat conduction path; its flexibility perfectly fits curved surfaces, eliminating heat leakage points caused by seams in traditional rigid materials, and improving the overall insulation continuity. The high-purity aluminum foil layer 2033 efficiently reflects the infrared radiation from the heating zone back into the oven shell 2 through the mirror reflection principle, significantly reducing the loss of heat energy transferred to the insulation layer in the form of radiation. At the same time, its metallic properties ensure long-term stability in high-temperature environments and avoid performance degradation caused by oxidation. Through the cooperation of the basalt fiberboard base layer 201, the outer functional layer 202, and the inner functional layer 203, the whole system achieves energy consumption optimization and long-term stable operation while maintaining high-temperature uniformity.
[0027] When materials need to be picked up or placed, the output end of the servo motor 5 drives the screw 6 to rotate. During the rotation of the screw 6, the screw sleeve 7 moves forward, and the screw sleeve 7 moves the horizontal plate 8 forward, pushing the placement rack 13 out of the inner cavity of the oven shell 2, which facilitates the picking up and placing of materials and improves the overall safety during operation. (The above is the working process of the entire device. The contents not described in detail in this specification are known to those skilled in the art.)
[0028] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] 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 parison oven with a thermal insulation structure, comprising a base plate (1), characterised in that: An oven shell (2) is fixedly connected to the top of the base plate (1), and a preheating box (3) is fixedly connected to the top of the oven shell (2). The oven shell (2) includes a basalt fiberboard base layer (201), an outer functional layer (202), and an inner functional layer (203). The outer functional layer (202) includes a vacuum insulation board layer (2021), a stainless steel plate layer (2022), and a nano-ceramic coating (2023). The inner functional layer (203) includes a microporous calcium silicate board layer (2031), an aerogel felt layer (2032), and a high-purity aluminum foil layer (2033). The outer functional layer (202) is located on the outside of the basalt fiberboard base layer (201), and the inner functional layer (203) is located on the inside of the basalt fiberboard base layer (201).
2. The parison oven with a thermal insulation structure according to claim 1, characterized in that: The vacuum insulation panel (2021) is disposed on the outside of the basalt fiberboard base layer (201), the stainless steel plate layer (2022) is disposed on the outside of the vacuum insulation panel (2021), and the nano-ceramic coating (2023) is applied to the outside of the stainless steel plate layer (2022).
3. The parison oven with a heat-insulating structure according to claim 1, characterized in that: The microporous calcium silicate board layer (2031) is disposed on the inner side of the basalt fiberboard base layer (201), the aerogel felt layer (2032) is disposed on the inner side of the microporous calcium silicate board layer (2031), and the high-purity aluminum foil layer (2033) is wrapped around the inner side of the aerogel felt layer (2032).
4. The preform oven with a heat insulation structure according to claim 1, characterized in that: The oven shell (2) has heat-insulating doors (4) connected to both sides of the front surface via hinges. A servo motor (5) is fixedly connected to the left side of the back side of the oven shell (2). A screw (6) is fixedly connected to the output end of the servo motor (5). A screw sleeve (7) is threaded onto the surface of the screw (6). A horizontal plate (8) is fixedly connected to the right side of the screw sleeve (7). A placement rack (13) is fixedly connected to the top of the horizontal plate (8).
5. The preform oven with a heat-insulating structure according to claim 4, characterized in that: A guide rod (9) is fixedly connected to the right side of the bottom of the inner cavity of the oven shell (2). A movable sleeve (10) is slidably connected to the surface of the guide rod (9). The left side of the movable sleeve (10) is fixedly connected to the back side of the right side of the horizontal plate (8).
6. The preform oven with a heat-insulating structure according to claim 5, characterized in that: The bottom of the inner cavity of the oven shell (2) is fixedly connected to the left and right sides of the slide groove (12), and the bottom of the screw sleeve (7) and the bottom of the movable sleeve (10) are fixedly connected to the slider (11), and the bottom of the slider (11) is slidably connected to the inner cavity of the slide groove (12).