Vehicle air duct assembly hot-pressing shaping and rapid cooling jig

Abstract

The utility model discloses a vehicle air duct assembly hot pressing shaping quick cooling fixture, including lower mould and upper mould, the inside of lower mould and upper mould is installed with half inner mould through half limit bearing, one end of half inner mould is fixedly connected with half axle rod, and the end of half axle rod is fixed with half gear; The utility model discloses a power transmission through half gear and half axle rod, then through half limit bearing and the installation connection of rotation's limiting, be equipped with cooling air channel and air inlet channel in the inside of lower mould, be equipped with spiral cooling pipe in the inside of air inlet channel, convenient for the circulation delivery of nitrogen, and through the heat dissipation fan, the airflow is sent to the air inlet channel, convenient for the cold air of nitrogen emission to emit, and convenient for the inside of cooling air channel, and the inner mould continues the rotation, can keep the heat dissipation uniformity of inner mould, keeps the air duct quick shaping and cooling.

Description

Technical Field

[0001] This utility model is applicable to the hot pressing and shaping of air duct assemblies, and more specifically to a cooling fixture, relating to a rapid cooling fixture for hot pressing and shaping of automotive air duct assemblies. Background Technology

[0002] Automotive air ducts are an indispensable core component in automobile manufacturing. Their main function is to guide and distribute airflow to meet the requirements of in-vehicle comfort, aerodynamic performance, and system efficiency. They have a wide range of applications.

[0003] The materials chosen for automotive air ducts are usually thermoplastics (such as polypropylene PP, polyamide PA, ABS, etc.) or composite materials (such as glass fiber reinforced plastics, carbon fiber composites), because they have advantages such as lightweight, good formability and low cost.

[0004] Hot pressing is a key process in automotive air duct manufacturing. It involves heating and pressurizing the material to soften or melt it at high temperatures, then shaping and solidifying it under the action of a mold. The technical principles include: Heating stage: Heating the air duct material above its glass transition temperature (typically 150-200℃) to make it malleable. Pressurization stage: Applying uniform pressure (range: 0.5-5MPa) through a mold to ensure the material adheres to the mold surface and forms the desired shape. Holding and cooling stage: After the material has solidified, the temperature is gradually reduced to solidify the structure, preventing defects caused by excessively rapid or slow cooling.

[0005] Cooling fixtures are key equipment in hot pressing processes used to achieve rapid cooling. Their core objectives are: 1. Shortening cooling time: Rapidly reducing the temperature of the air duct material through efficient heat dissipation technologies (such as liquid nitrogen injection, water-cooled channels, and forced convection), thereby improving production efficiency. 2. Uniform cooling: Ensuring a consistent temperature gradient throughout the air duct during cooling to avoid localized deformation or uneven performance. 3. Controlling the cooling rate: Adjusting the cooling rate according to material properties to prevent brittle fracture, stress concentration, or the formation of internal bubbles.

[0006] Therefore, rapid cooling during hot pressing of automotive air duct assemblies is a critical technical bottleneck that urgently needs to be addressed. Existing cooling fixtures are inadequate in terms of efficiency, uniformity, energy consumption, and safety, failing to meet the comprehensive demands of automotive manufacturing for high quality, high efficiency, and environmental protection. Therefore, developing a fixture that integrates efficient heating, precise pressure application, and rapid cooling has become an inevitable trend to achieve rapid curing after hot pressing while ensuring the structural stability and functionality of the air duct. Utility Model Content

[0007] One objective of this invention is to provide a new technical solution for a hot-pressing and rapid cooling fixture for automotive air duct assemblies.

[0008] According to a first aspect of the present invention, a rapid cooling fixture for hot pressing and shaping of automotive air duct assembly is provided, comprising a lower mold and an upper mold, wherein a semi-inner mold is installed inside the lower mold and the upper mold via a semi-limiting bearing, a semi-shaft rod is fixedly connected to one end of the semi-inner mold, and a semi-gear is fixedly provided at the end of the semi-shaft rod.

[0009] The lower mold has several cooling air channels inside, and an air inlet channel inside. The cooling air channels are interconnected with the air inlet channel. A spiral cooling pipe is embedded inside the lower mold and is located inside the air inlet channel.

[0010] Furthermore, several support springs are embedded inside the lower mold, and an anti-detachment plate is fixedly provided at the upper end of the support springs, and a guide rod is fixedly provided at the upper end of the anti-detachment plate.

[0011] Furthermore, the anti-detachment plate and the guide rod are movably located inside the lower mold, and the upper end of the guide rod is movably located inside the upper mold.

[0012] Furthermore, one end of the spiral cooling pipe is connected to a nitrogen input pipe, and the other end of the spiral cooling pipe is connected to a nitrogen output pipe. Both the nitrogen input pipe and the nitrogen output pipe are embedded in one side of the lower mold.

[0013] Furthermore, one end of the lower mold is fixedly connected to a frustoconical air supply pipe, which is sealed and connected to the air inlet duct.

[0014] Furthermore, a cross-shaped fixing bracket is fixedly installed inside one end of the air supply pipe, and a cooling fan is fixedly installed inside the cross-shaped fixing bracket.

[0015] Furthermore, the semi-limiting bearing, semi-inner mold, semi-shaft rod, and semi-gear in the lower mold and the upper mold have the same structure, the two semi-inner molds are fitted together, and a hot-pressing mold cavity is formed inside.

[0016] The beneficial effects of this utility model are:

[0017] When in use, this utility model uses an upper mold and a lower mold to fit together and form a hot-press mold cavity, which can effectively heat-press and shape the automotive air duct. In order to facilitate the rotation of the semi-inner mold, power is transmitted through a semi-gear and a semi-shaft, and then the semi-limit bearing is used for limiting and rotating installation connection, thereby improving the cooling efficiency and uniformity of the automotive air duct.

[0018] The lower mold is equipped with cooling air channels and air inlets. Inside the air inlets, there are spiral cooling pipes. These spiral cooling pipes transport nitrogen through nitrogen inlet and outlet pipes, facilitating nitrogen circulation. A cooling fan directs airflow into the air inlets, dissipating the cool air from the nitrogen and delivering it into the cooling air channels to dissipate heat from the inner mold. The continuous rotation of the inner mold ensures uniform heat dissipation, allowing for rapid cooling and shaping of the air channels.

[0019] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of a rapid cooling fixture for hot pressing and shaping of an automotive air duct assembly in one embodiment.

[0022] Figure 2 This is a cross-sectional view of the overall structure of a rapid cooling fixture for hot pressing and shaping of an automotive air duct assembly in one embodiment.

[0023] Figure 3 This is a schematic diagram of the lower mold structure of a rapid cooling fixture for hot pressing of an automotive air duct assembly in one embodiment;

[0024] Figure 4 This is a schematic diagram of the lower mold part of the hot pressing and rapid cooling fixture for the automotive air duct assembly in the fourth embodiment.

[0025] The diagram shows the following: 1. Lower mold; 2. Upper mold; 3. Cooling duct; 4. Air inlet duct; 5. Coiling cooling pipe; 6. Semi-inner mold; 7. Semi-shaft; 8. Semi-gear; 9. Semi-limit bearing; 10. Support spring; 11. Anti-detachment plate; 12. Guide rod; 13. Nitrogen input pipe; 14. Nitrogen output pipe; 15. Gas supply pipe; 16. Cross-shaped fixing bracket; 17. Cooling fan; 18. Hot press mold cavity. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] like Figures 1-4 As shown, the automotive air duct assembly hot pressing and shaping rapid cooling fixture includes a lower mold 1 and an upper mold 2. A semi-inner mold 6 is installed inside the lower mold 1 and the upper mold 2 through a semi-limiting bearing 9. A semi-shaft rod 7 is fixedly connected to one end of the semi-inner mold 6, and a semi-gear 8 is fixedly provided at the end of the semi-shaft rod 7.

[0031] The lower mold 1 has several cooling air channels 3 inside, and the lower mold 1 also has an air inlet channel 4 inside. The cooling air channels 3 and the air inlet channel 4 are interconnected. A spiral cooling pipe 5 is embedded inside the lower mold 1 and is located inside the air inlet channel 4.

[0032] In this embodiment, preferably, a plurality of support springs 10 are embedded and installed inside the lower mold 1, and an anti-detachment plate 11 is fixedly provided at the upper end of the support springs 10, and a guide rod 12 is fixedly provided at the upper end of the anti-detachment plate 11.

[0033] It should be noted that the lower mold 1 is equipped with several support springs 10 inside, which facilitates the elastic adjustment of the guide rod 12. Furthermore, the anti-detachment plate 11 prevents the guide rod 12 from falling off under the action of the support springs 10, thus preventing the lower mold 1 and the upper mold 2 from being accurately connected.

[0034] In this embodiment, preferably, the anti-detachment plate 11 and the guide rod 12 are movably located inside the lower mold 1, and the upper end of the guide rod 12 is movably located inside the upper mold 2;

[0035] It should be noted that the anti-detachment plate 11 and the guide rod 12 are located inside the lower mold 1, which allows for an appropriate adjustment distance inside the lower mold 1 when the upper mold 2 and the lower mold 1 are in contact and the guide rod 12 is pushed by force.

[0036] In this embodiment, preferably, one end of the spiral cooling pipe 5 is connected to a nitrogen input pipe 13, and the other end of the spiral cooling pipe 5 is connected to a nitrogen output pipe 14. Both the nitrogen input pipe 13 and the nitrogen output pipe 14 are embedded and installed on one side of the lower mold 1.

[0037] It should be noted that the nitrogen inlet pipe 13 and nitrogen outlet pipe 14 facilitate the delivery of liquid nitrogen into the interior of the spiral cooling pipe 5, thereby enabling the spiral cooling pipe 5 to dissipate cold air inside the lower mold 1, effectively cooling the inner mold and allowing the air duct inside the hot pressing mold cavity 18 to cool and form quickly.

[0038] In this embodiment, preferably, one end of the lower mold 1 is fixedly connected to a frustum-shaped air supply pipe 15, and the air supply pipe 15 is sealed and connected to the air inlet duct 4.

[0039] It should be noted that the frustum-shaped air supply pipe 15 is designed to supply air, so that the airflow can enter the interior of the air inlet duct 4 and the airflow can evenly contact the cold air emitted by the spiral cooling pipe 5 with the inner mold to achieve rapid heat dissipation and cooling.

[0040] In this embodiment, preferably, a cross-shaped fixing bracket 16 is fixedly installed inside one end of the air supply pipe 15, and a cooling fan 17 is fixedly installed inside the cross-shaped fixing bracket 16.

[0041] It should be noted that the cooling fan 17 is fixedly installed by setting the cross bracket 16, and the operation of the cooling fan 17 facilitates the airflow into the air supply pipe 15, facilitates the airflow into the air inlet duct 4, and facilitates the airflow to evenly contact the cold air emitted by the swirling cooling pipe 5 with the inner mold, so as to achieve rapid heat dissipation and cooling.

[0042] In this embodiment, preferably, the semi-limiting bearing 9, semi-inner mold 6, semi-shaft rod 7 and semi-gear 8 in the lower mold 1 and the upper mold 2 have the same structure, the two semi-inner molds 6 are fitted together, and a hot pressing mold cavity 18 is formed inside.

[0043] It should be noted that by fitting the semi-limiting bearing 9, semi-inner mold 6, semi-shaft rod 7 and semi-gear 8 in the lower mold 1 and upper mold 2 with the same structure, the complete limiting bearing, inner mold, shaft rod and gear can be formed, which facilitates rotation adjustment control. In addition, the hot pressing mold cavity 18 is set to realize the hot pressing forming of the air duct.

[0044] The specific operational procedures for this application are as follows:

[0045] During use, the lifting mechanism controls the lifting and adjustment of the upper mold 2 so that the lower mold 1 and the upper mold 2 can fit together. When the lower mold 1 and the upper mold 2 are close together, the guide rod 12 guides them so that the lower mold 1 and the upper mold 2 can fit together precisely. Then, the material solution is delivered between the two semi-inner molds 6. After the lower mold 1 and the upper mold 2 are hot-pressed for a period of time, they are cooled and shaped.

[0046] At this time, liquid nitrogen is introduced into the interior of the spiral cooling pipe 5 through the nitrogen inlet pipe 13 via an external device, and the liquid nitrogen is circulated through the nitrogen outlet pipe 14 to achieve nitrogen recycling. The spiral cooling pipe 5 is spirally arranged inside the air inlet duct 4, and the cooling fan 17 inside the conical air supply pipe 15 is started, so that the cooling fan 17 can deliver the external airflow into the interior of the air inlet duct 4. The airflow carries the cold air emitted by the spiral cooling pipe 5 inside the air inlet duct 4, so that the cold air flows inside the air inlet duct 4 and the cooling air duct 3. The internal mold is rotated by an external servo motor, in conjunction with gears and shafts, so that the internal mold can be evenly contacted with the cold air, which facilitates the continuous rotation of the internal mold, maintains the heat dissipation uniformity of the internal mold, and maintains the rapid shaping and cooling of the air duct.

[0047] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A hot-pressing and rapid cooling fixture for automotive air duct assemblies, characterized in that: It includes a lower mold (1) and an upper mold (2). The lower mold (1) and the upper mold (2) are equipped with a semi-inner mold (6) through a semi-limiting bearing (9). One end of the semi-inner mold (6) is fixedly connected to a semi-shaft rod (7), and a semi-gear (8) is fixedly provided at the end of the semi-shaft rod (7). The lower mold (1) has several cooling air channels (3) inside, and the lower mold (1) also has an air inlet channel (4) inside. The cooling air channels (3) are interconnected with the air inlet channel (4). A spiral cooling pipe (5) is embedded in the lower mold (1) and is located inside the air inlet channel (4).

2. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 1, characterized in that: Several support springs (10) are embedded inside the lower mold (1). The upper end of the support spring (10) is fixedly provided with an anti-detachment plate (11), and the upper end of the anti-detachment plate (11) is fixedly provided with a guide rod (12).

3. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 2, characterized in that: The anti-detachment plate (11) and the guide rod (12) are movably located inside the lower mold (1), and the upper end of the guide rod (12) is movably located inside the upper mold (2).

4. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 1, characterized in that: One end of the spiral cooling pipe (5) is connected to a nitrogen input pipe (13), and the other end of the spiral cooling pipe (5) is connected to a nitrogen output pipe (14). Both the nitrogen input pipe (13) and the nitrogen output pipe (14) are embedded in one side of the lower mold (1).

5. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 1, characterized in that: One end of the lower mold (1) is fixedly connected to a frustum-shaped air supply pipe (15), and the air supply pipe (15) is sealed and connected to the air inlet duct (4).

6. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 5, characterized in that: A cross-shaped fixing bracket (16) is fixedly installed inside one end of the air supply pipe (15), and a cooling fan (17) is fixedly installed inside the cross-shaped fixing bracket (16).

7. The automotive air duct assembly hot pressing and rapid cooling fixture according to claim 1, characterized in that: The semi-limiting bearing (9), semi-inner mold (6), semi-shaft (7) and semi-gear (8) in the lower mold (1) and the upper mold (2) have the same structure. The two semi-inner molds (6) fit together and form a hot-pressing mold cavity (18) inside.

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