A cooling and shaping device for automobile engine cover sound insulation pad

Abstract

The present invention relates to a cooling and shaping device for automobile engine hood sound insulation pads, comprising a bracket, a support, a panel and a fan. The bracket comprises a bottom plate, the bottom plate is fixed on the bracket, a circle of profile support panels are arranged on the bottom plate, and a plurality of positioning pins are evenly distributed on the bottom plate area surrounded by the profile support panels; the panel is arranged on the bottom plate area surrounded by the profile support panels, and a plurality of positioning through holes and heat dissipation holes are evenly opened on the panel; the fan is arranged below the bottom plate, the air inlet of the fan is connected to the bottom plate, and the air outlet is in the direction away from the bottom plate. Compared with the prior art, the present invention shortens the cooling and shaping time of automobile engine hood sound insulation pad parts after hot pressing forming, and can quickly cool to room temperature; ensures the size of the parts after hot pressing forming of automobile engine hood sound insulation pad parts, and ensures the subsequent installation of the product; prevents the automobile engine hood sound insulation pad parts from being deformed by external forces during the cooling process after hot pressing forming.

Description

Technical Field

[0001] The invention relates to a cooling and shaping device, in particular to a cooling and shaping device for a sound insulation pad of an automobile engine cover. Background Art

[0002] The car engine hood sound insulation pad is installed on the inside of the car engine hood. It mainly plays the role of reducing the noise and heat generated by the engine on the cockpit. Therefore, the heat resistance, heat insulation, sound insulation and impact resistance of the sound insulation pad should be considered when selecting materials and designing the structure. The most commonly used molding process for car engine hood sound insulation pad parts is mold hot pressing molding, which can quickly and effectively press out various products required for automotive interior parts.

[0003] The composite material structure of PET+glass fiber+PET is often used in the production process of automobile engine hood sound insulation pads. In this process, the mold is first heated to a temperature range of 180±30℃, and then the composite material of the sound insulation pad is placed in the cavity of the hot pressing mold for pressurization and closure. The hydraulic press pressure is increased to between 18±2MPa, so that the composite material is heated and squeezed by the die and the punch inside the cavity to deform. The mold closing time is controlled at 120±15s, and then the mold is opened to separate the product and waste, and the parts are taken out.

[0004] When parts are cooled to room temperature after hot pressing, they are usually cooled slowly in the air, which affects production efficiency. Moreover, the parts will undergo structural shrinkage due to the decrease in temperature, the assembly hole size deformation will exceed the error range, and adverse deformations such as warping will occur, thereby affecting the assembly mismatch between the engine hood sound insulation pad and the car engine hood sheet metal. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a cooling and shaping device for the sound insulation pad of the automobile engine cover.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The cooling and shaping device for the automobile engine cover sound insulation pad of the present invention comprises a bracket, a support, a panel and a fan, wherein specifically:

[0008] The bracket includes a bottom plate, the bottom plate is fixed on the bracket, a circle of profile support panels are arranged on the bottom plate, a plurality of positioning pins are evenly distributed on the bottom plate area surrounded by the profile support panels, and the positioning pins correspond to the part holes on the sound insulation pad;

[0009] The panel is arranged on the bottom plate area surrounded by the profile support enclosure, and a plurality of positioning through holes and heat dissipation holes are evenly opened on the panel, and the arrangement position of the positioning through holes corresponds to the positioning pins;

[0010] The fan is arranged below the bottom plate, the air inlet of the fan is connected to the bottom plate, and the air outlet is in a direction away from the bottom plate.

[0011] Furthermore, a plurality of ventilation holes are provided on the profile support panel.

[0012] Furthermore, the panel is a glass fiber panel.

[0013] Further, the bottom plate area enclosed by the profiled support panel matches the sound insulation pad.

[0014] Furthermore, the diameter of the heat dissipation hole is 20-60 mm, and the spacing between adjacent positioning through holes is 60-100 mm. The diameter within the range of 20-60 mm can meet the bandwidth requirements of the formation of the air duct, that is, the heat flux of heat conduction, and the spacing design of 60-100 mm can realize the formation of a balanced convection heat exchange air duct, so that the temperature reduction inside the sound insulation pad is more balanced.

[0015] Furthermore, the diameter of the ventilation hole is 40-60 mm.

[0016] Furthermore, the bracket is made of ZL104 cast aluminum material.

[0017] Furthermore, the profile support panel is vertically arranged on the base plate, and the height of the profile support panel is 15 mm.

[0018] Furthermore, the cooling and shaping device also includes a microprocessor and a temperature sensor;

[0019] The temperature sensors are evenly distributed on the panel;

[0020] The microprocessor is arranged on the bracket, and the microprocessor is electrically connected to the fan;

[0021] During cooling and shaping, the temperature sensor contacts the sound insulation pad, and the temperature sensor sends the obtained temperature value to the microprocessor. The microprocessor calculates the temperature reduction rate in real time, and sends a control instruction to the fan in real time according to the temperature reduction rate, so as to adjust the speed of the fan in real time.

[0022] Furthermore, the microprocessor is an ARM processor.

[0023] The specific operating mechanism of the present invention: The present invention adopts an inhalation-type air convection heat exchange method, and the overall convection heat exchange is relatively mild, so that the cooling rate is fast and easy to control. The air enters the gap between the sound insulation pad and the supporting enclosure from the multiple ventilation holes on the supporting enclosure and is discharged from the ventilation holes; the air on the upper surface of the sound insulation pad enters the bottom of the sound insulation pad from the positioning through holes and is discharged from the ventilation holes; the air on the upper surface of the sound insulation pad directly enters the gap between the sound insulation pad and the profiled supporting enclosure and is discharged from the ventilation holes. In this way, the airflow near the sound insulation pad forms a smooth and stable air duct, so that the sound insulation pad and the nearby airflow can fully convectively exchange heat. At the same time, the panel made of glass fiber material significantly reduces the heat conduction between the sound insulation pad and the panel, thereby making the heat flow transmitted from the sound insulation pad to the panel almost zero, thereby forming a single convection heat transfer. This technical solution adopts sufficient convection heat exchange to reduce the cooling gradient inside the sound insulation pad, and cooperates with the multi-point positioning of multiple positioning pins to significantly reduce the deformation of the sound insulation pad during the cooling process.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1) Shorten the cooling and shaping time of automobile engine cover sound insulation pad parts after hot pressing, and quickly cool them to room temperature, thereby improving production efficiency.

[0026] 2) Ensure the size of the car engine cover sound insulation pad parts after hot pressing and ensure the subsequent installation of the product.

[0027] 3) Prevent automobile engine hood sound insulation pad parts from being deformed by external forces during the cooling process after hot pressing, thus ensuring product quality.

[0028] 4) This technical solution adopts real-time feedback control of real-time air volume to achieve balanced cooling of the internal structure of the sound insulation pad and avoid structural deformation caused by temperature gradient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the cooling and shaping device for the automobile engine cover sound insulation pad in the present invention;

[0030] Figure 2 It is a schematic diagram of the top view of the cooling and shaping device for the automobile engine cover sound insulation pad in the present invention;

[0031] Figure 3 It is a side view structural schematic diagram of the cooling and shaping device for the automobile engine cover sound insulation pad in the present invention;

[0032] Figure 4 It is a structural schematic diagram of the bracket in the present invention;

[0033] Figure 5 It is a structural schematic diagram of the panel in the present invention;

[0034] Figure 6 It is a schematic structural diagram of the finished sound insulation pad of the present invention.

[0035] In the figure: 1, bracket, 2, support, 3, panel, 4, fan, 5, sound insulation pad, 21, bottom plate, 22, profile support panel, 23, positioning pin, 24, ventilation hole, 31, positioning through hole, 32, heat dissipation hole, 51, part hole. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The cooling and shaping device for the automobile engine cover sound insulation pad of the present invention comprises a bracket 1, a bracket 2, a panel 3 and a fan 4, see Figure 1 , Figure 2 and Figure 3 .

[0038] Bracket 2 part: including bottom plate 21, see Figure 1 , Figure 2 and Figure 4 The bottom plate 21 is fixed on the bracket 1. A circle of profile support panels 22 are provided on the bottom plate 21. A plurality of positioning pins 23 are evenly distributed on the bottom plate 21 area surrounded by the profile support panels 22. The positioning pins correspond to the part holes 51 on the sound insulation pad 5. Figure 6 The area of ​​the bottom plate 21 surrounded by the profile support panel 22 matches the sound insulation pad 5. A plurality of ventilation holes 24 are provided on the profile support panel 22. In terms of specific material selection and type selection, the aperture of the ventilation hole 24 is 40 to 60 mm. The bracket 2 is made of ZL104 cast aluminum material, and the profile support panel 22 is vertically arranged on the bottom plate 21, and the height of the profile support panel 22 is 15 mm.

[0039] Panel 3 Section: See Figure 5 , arranged on the area of ​​the bottom plate 21 surrounded by the profile support enclosure 22, a plurality of positioning through holes 31 and heat dissipation holes 32 are evenly opened on the panel 3, and the setting position of the positioning through hole 31 corresponds to the positioning pin 23. In terms of specific material selection and selection, the aperture of the heat dissipation hole 32 is 20 to 60 mm, and the setting spacing between adjacent positioning through holes 31 is 60 to 100 mm. The aperture in the range of 20 to 60 mm can meet the bandwidth requirements of the formation of the air duct, that is, the heat flux of heat conduction, and the spacing design of 60 to 100 mm can realize the formation of a balanced convection heat exchange air duct, so that the cooling inside the sound insulation pad 5 is more balanced. The panel 3 is a glass fiber panel.

[0040] Fan 4: located below the bottom plate 21, see Figure 1 The air inlet of the fan 4 is connected to the bottom plate 21 , and the air outlet is in a direction away from the bottom plate 21 .

[0041] Microprocessor and temperature sensor part: The temperature sensors are evenly distributed on the panel 3; the microprocessor is arranged on the bracket 1, and the microprocessor is electrically connected to the fan 4; when cooling and shaping, the temperature sensor abuts against the sound insulation pad 5, and the temperature sensor sends the obtained temperature value to the microprocessor, and the microprocessor calculates the temperature reduction rate in real time, and sends a control instruction to the fan 4 in real time according to the temperature reduction rate, so as to adjust the speed of the fan in real time. In the specific implementation, the microprocessor is an ARM processor.

[0042] When the present invention is specifically operated: after the mold is opened, the sound insulation pad 5 is demolded, the sound insulation pad 5 is taken out, and the sound insulation pad 5 is placed on the bottom plate 21 area surrounded by the profile support panel 22, the cooling and shaping device in the present invention is turned on, the fan 4 is running, and is controlled in real time by the microprocessor. The present invention adopts an inhalation-type air convection heat exchange method, and the overall convection heat exchange is relatively gentle, so that the cooling rate is fast and easy to control. The air enters the gap between the sound insulation pad 5 and the support panel 22 through the multiple ventilation holes 24 on the support panel 22, and is discharged from the ventilation holes 24; the air on the upper surface of the sound insulation pad 5 enters the bottom of the sound insulation pad 5 through the positioning through hole 31, and is discharged from the ventilation hole 24; the air on the upper surface of the sound insulation pad 5 directly enters the gap between the sound insulation pad 5 and the profile support panel 22, and is discharged from the ventilation hole 24. In this way, the airflow near the sound insulation pad 5 forms a smooth and stable air duct, so that the sound insulation pad 5 and the nearby airflow can fully exchange heat through convection. At the same time, the panel 3 made of glass fiber material significantly reduces the heat conduction between the sound insulation pad 5 and the panel 3, so that the heat flow transmitted from the sound insulation pad 5 to the panel 3 is almost zero, thus forming a single convection heat transfer. This technical solution uses sufficient convection heat exchange to reduce the cooling gradient inside the sound insulation pad 5, and cooperates with the multi-point positioning of multiple positioning pins 23 to significantly reduce the deformation of the sound insulation pad 5 during the cooling process.

[0043] Real-time feedback control of real-time air volume is adopted. The temperature sensor sends the obtained temperature value to the microprocessor. The microprocessor calculates the temperature reduction rate in real time, and sends a control instruction to the fan 4 in real time according to the temperature reduction rate, so as to adjust the speed of the fan in real time. That is, when the cooling rate exceeds the preset value, the microprocessor sends a command to reduce the speed to the motor of the fan 4. When the cooling rate is lower than the preset value, the microprocessor sends a command to increase the speed to the motor of the fan 4. In this way, real-time control is achieved to meet the balanced cooling of the internal structure of the sound insulation pad 5 and avoid structural deformation caused by temperature gradient.

[0044] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A cooling and shaping device for a car engine cover sound insulation pad, characterized in that: include: Bracket (1); The bracket (2) comprises a bottom plate (21), the bottom plate (21) being fixed on the bracket (1), the bottom plate (21) being provided with a circle of profile support panels (22), a plurality of positioning pins (23) being evenly distributed on the area of ​​the bottom plate (21) surrounded by the profile support panels (22), the positioning pins corresponding to the part holes (51) on the sound insulation pad (5); A panel (3) is arranged on a region of the bottom plate (21) surrounded by the profile support enclosure (22), and a plurality of positioning through holes (31) and heat dissipation holes (32) are evenly arranged on the panel (3), wherein the positioning through holes (31) are arranged at positions corresponding to the positioning pins (23); A fan (4) is arranged below the bottom plate (21), an air inlet of the fan (4) is connected to the bottom plate (21), and an air outlet is in a direction away from the bottom plate (21); The profile support enclosure (22) is provided with a plurality of ventilation holes (24); The panel (3) is a glass fiber panel; The area of ​​the bottom plate (21) enclosed by the profiled support panel (22) matches the sound insulation pad (5); The diameter of the heat dissipation hole (32) is 20-60 mm, and the spacing between adjacent positioning through holes (31) is 60-100 mm; The diameter of the ventilation hole (24) is 40-60 mm.

2. A cooling and shaping device for a sound insulation pad for an automobile engine cover according to claim 1, characterized in that: The bracket (2) is made of ZL104 cast aluminum material.

3. The cooling and shaping device for automobile engine cover sound insulation pad according to claim 1, characterized in that: The profile support panel (22) is vertically arranged on the bottom plate (21), and the height of the profile support panel (22) is 15 mm.

4. A cooling and shaping device for a car engine cover sound insulation pad according to claim 1, characterized in that: The cooling and shaping device also includes a microprocessor and a temperature sensor; The temperature sensors are evenly distributed on the panel (3); The microprocessor is arranged on the bracket (1), and the microprocessor is electrically connected to the fan (4); During cooling and shaping, the temperature sensor contacts the sound insulation pad (5), and the temperature sensor sends the acquired temperature value to the microprocessor. The microprocessor calculates the temperature reduction rate in real time, and sends a control instruction to the fan (4) in real time according to the temperature reduction rate, so as to adjust the fan speed in real time.

5. A cooling and shaping device for a sound insulation pad for an automobile engine cover according to claim 4, characterized in that: The microprocessor is an ARM processor.

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