Automobile damping fin shaping equipment and automobile damping fin shaping method

Abstract

The invention relates to automobile damping fin shaping equipment and a shaping method of the automobile damping fin, and relates to the technical field of damping fin shaping device.The shaping equipment comprises an upper die moving in the vertical direction and a fixedly-arranged lower die, an annular groove used for forming is formed in the lower die, and an annular block matched with the annular groove is integrally formed on the lower surface of the upper die; a plurality of movable blocks are arranged in the annular groove in a sliding mode, the movable blocks are spliced end to end to form an annular piece, and an abutting mechanism enabling the movable blocks to abut end to end and abut against the inner wall of the annular groove is arranged on the lower die. The mold has the effects of improving the product quality and reducing the mold damage possibility.

Description

Technical Field

[0001] The present application relates to the technical field of damping plate shaping equipment, and in particular to an automobile damping plate shaping equipment and an automobile damping plate shaping method. Background Art

[0002] Automobile damping sheet, also known as cement or damping block, is a viscoelastic material, mainly used to stick on the inner surface of the car body, close to the steel plate wall of the car body. Its main function is to reduce noise and vibration, improve driving comfort and overall performance of the vehicle.

[0003] The manufacturing process of damping sheets is relatively complicated, but the core steps are clear and specific. First, select suitable raw materials, which usually include polymer resin materials or rubber materials, which have excellent physical and chemical properties, such as vibration and noise reduction, heat resistance, cold resistance, anti-aging and strong adhesion. In addition, some auxiliary materials such as fillers and oils may be added to enhance their performance. The evenly mixed raw materials are then fed into the extruder for extrusion molding. During the extrusion process, the temperature, pressure and extrusion speed need to be kept stable to ensure that the product has good appearance, size and performance. In the extrusion molding process, the damping material is plasticized into the desired shape, such as sheets or strips, by the rotation and pushing action of the screw of the extruder. Subsequently, these semi-finished damping sheets will enter the finalization step.

[0004] At present, the common automotive damping plate shaping equipment on the market mainly includes shaping molds, shaping cylinders, heating devices and control systems. The shaping mold is usually made of high-strength and high-wear-resistant materials to ensure its service life and shaping accuracy. The shaping cylinder is responsible for providing sufficient pressure so that the damping plate can fit tightly on the inner wall of the mold to form a stable shape. The heating device is used to adjust the temperature of the mold to ensure that the damping plate can maintain proper softening and fluidity during the shaping process.

[0005] A Chinese patent with announcement number CN214026780U discloses a shaping device for automobile damping plates, including a workbench, support columns are fixedly provided at the four corners of the workbench, a top plate is fixedly provided on the support columns, a first telescopic cylinder is fixedly provided on the top plate, a piston rod of the first telescopic cylinder passes through the top plate and a pressure sensor is fixedly provided at the lower end, a mounting plate is fixedly provided under the pressure sensor, an upper shaping pressure head is fixedly provided under the mounting plate, a limiting device is provided on the mounting plate, and a guiding device is provided under the shaping pressure head. An annular shaping groove is provided at the upper end of the shaping mold, an annular ejection plate is fixedly provided under the annular shaping groove, a plurality of second telescopic cylinders are fixedly provided under the annular ejection plate, and the cylinder body of the second telescopic cylinder is fixedly embedded in the lower end of the shaping mold.

[0006] With respect to the above-mentioned related technologies, the inventors believe that the damping plate to be formed is placed in the annular molding groove, and the damping plate is processed into the desired shape through the joint action of the annular ejector plate and the molding pressure head. However, during the processing, due to thermal expansion and contraction and other reasons, an interference fit or a clearance fit will appear between the annular molding groove and the annular ejector plate, which will affect the product quality on the one hand, and on the other hand, the thermal expansion will make it difficult for the annular ejector plate to move, which can easily cause damage to the mold. Summary of the invention

[0007] In order to improve product quality and reduce the possibility of mold damage, the present application provides an automobile damping plate shaping device and an automobile damping plate shaping method.

[0008] In the first aspect, the present application provides an automobile damping plate shaping device adopting the following technical solution:

[0009] A vehicle damping plate shaping device comprises an upper die moving in the vertical direction and a fixed lower die, the lower die is provided with an annular groove for forming, an annular block cooperating with the annular groove is integrally formed on the lower surface of the upper die, a plurality of movable blocks are slidably arranged in the annular groove, the movable blocks are spliced ​​end to end to form an annular member, and a tightening mechanism is provided on the lower die to make the movable blocks press against each other end to end and press against the inner wall of the annular groove.

[0010] By adopting the above technical scheme, during the processing, the staff first acts on the clamping mechanism to move the movable block downward, and the movable blocks and the inner walls on both sides of the annular groove are pressed tightly to avoid gaps between them. Then the semi-finished damping plate to be processed is placed in the annular groove, and the upper mold is acted on to make the upper mold drive the annular block to move toward the annular groove, and the semi-finished damping plate is squeezed to form the required damping plate. Since the movable blocks are independent of each other, they can cooperate with the clamping mechanism during the processing process, and adjust each other during the process of thermal expansion and contraction to reduce the possibility of mold damage.

[0011] Optionally, the clamping mechanism includes an ejection cylinder arranged below the lower mold and driving the movable block to move up and down, and a buffer part with a buffering and adjusting function is fixed on the ejection cylinder. The outer wall of the lower end of the annular groove is inclined from top to bottom in a direction close to the axis of the annular groove, so that the angle between the outer wall of the lower end of the annular groove and the horizontal bottom wall is α, and α is an obtuse angle. The outer wall of the movable block is consistent in shape with the outer wall of the lower end of the annular groove and fits each other.

[0012] By adopting the above technical solution, the angle between the outer wall of the lower end of the annular groove and the horizontal bottom wall is α, and α is an obtuse angle. When the ejection cylinder drives the movable block to move downward, the movable block moves toward the center position, which is convenient for the movable block to be retracted and fit tightly. At the same time, a certain chamfer can be formed at the outer edge position of the lower surface of the damping plate, making the overall structure smoother.

[0013] Optionally, the contact surfaces between the movable blocks are wavy and fit each other.

[0014] By adopting the above technical solution, the contact surfaces between the movable blocks are wavy and fit each other, which increases the contact area between the movable blocks, ensures the synchronization of adjacent forming blocks during the lifting process, and further improves the sealing effect by increasing the length of the sealing surface.

[0015] Optionally, the wave-shaped structure of the movable block includes a protrusion protruding outward and a recessed portion having the same shape and structure as the protrusion and recessed inward, the protrusion is symmetrical on both sides of the wave crest and the tangent angle at the symmetrical positions on both sides is 90°.

[0016] By adopting the above technical solution, the protrusion and the recessed portion have the same shape, the protrusion and the recessed portion are symmetrical on both sides of the wave crest, and the tangent angle between the symmetrical positions on both sides is 90°, which can increase the contact area between two adjacent movable blocks as much as possible, and at the same time can fully ensure the strength between the protrusion and the recessed portion.

[0017] Optionally, the movable blocks are provided with interconnected heat transfer oil channels, wherein one of the movable blocks is provided with an oil inlet channel and an oil outlet channel connected to the outside.

[0018] By adopting the above technical solution, the heat transfer oil channel is used to pass hot oil to heat the mold and the semi-finished damping sheet, which is convenient for the subsequent extrusion molding of the damping sheet.

[0019] Optionally, a sealing gasket is provided on the heat transfer oil channel to connect two adjacent heat transfer oil channels and perform a sealing function.

[0020] By adopting the above technical solution, the sealing gasket has a certain elasticity to meet the needs of thermal expansion and contraction, and at the same time prevents hot oil from seeping out from between two adjacent movable blocks.

[0021] Optionally, oil pipes are installed in the heat transfer oil channel, the oil inlet channel and the oil outlet channel, cooling pipes for the flow of coolant are installed in the oil pipes, and corrugated pipes respectively connected to the corresponding oil pipes and cooling pipes are arranged between two adjacent movable blocks.

[0022] By adopting the above technical solution, after the damping plate is processed, the staff can discharge the hot oil in the heat transfer oil channel and then introduce cooling water into the cooling pipe to facilitate the cooling of the mold and the product and the shaping of the damping plate.

[0023] Optionally, two spiral pipes for heating and cooling the annular block are provided in the upper mold.

[0024] By adopting the above technical solution, the two spiral pipes are used to introduce coolant and hot oil respectively, and cooperate with the cooling pipe and oil channel below to improve the overall processing efficiency, while making the upper and lower temperatures of the mold more uniform, thereby improving the overall quality of the product.

[0025] Optionally, a through groove is provided on the annular block along its axial direction, an abutment rod is slidably arranged in the through groove, the lower end of the abutment rod is connected to the abutment block, and a receiving groove for accommodating the abutment block is provided at the lower end of the annular block. When the abutment block is located in the receiving groove, the abutment block is smoothly connected to the annular block and the lower end surface is flush with the lower end surface of the annular block, an abutment spring is provided in the through groove for pushing the abutment rod to move downward, and a pressure sensor for detecting the pressure of the abutment block is installed in the receiving groove.

[0026] By adopting the above technical scheme, the abutment rod is used to balance the negative pressure in the annular groove during the processing. When the annular block moves into the annular groove, the abutment rod is used to release the air in the annular groove to facilitate the movement of the annular block. When the annular block moves out of the annular groove, under the action of the abutment spring, the abutment block is separated from the receiving groove, and air enters the annular groove to facilitate the movement of the annular block out of the annular groove. The pressure sensor is used to detect the pressure of the damping plate during the processing process to facilitate the control of the pressure.

[0027] In a second aspect, the present application also provides a method for shaping an automobile damping sheet using the above-mentioned shaping device, comprising the following steps:

[0028] S1, the ejection cylinder drives the movable block to move downward, so that the movable blocks are pressed against each other and against the inner and outer walls of the annular groove;

[0029] S2, continuously inject hot oil into the oil pipe to preheat the lower mold;

[0030] S3, placing the semi-finished damping sheet to be formed into the annular groove, the upper die moves downward, the annular block is inserted into the annular groove, and the semi-finished damping sheet to be formed is extruded;

[0031] S4. After the extrusion is completed, the hot oil in the oil pipe is discharged, so that the coolant enters the cooling pipe and circulates in the cooling pipe;

[0032] S5. After the product is cooled and formed, the upper mold moves upward, and the ejection cylinder drives the movable block to move upward, so as to eject the formed product.

[0033] To sum up, the beneficial technical effects of the present invention are as follows: the movable block moves downward and moves toward the center, the movable blocks are pressed against the inner wall of the annular groove, the semi-finished damping plate is placed in the annular groove, heating is used to facilitate the deformation of the semi-finished damping plate, and cooling is used to facilitate the shaping of the damping plate. During the production process, alternation between hot and cold will occur. During thermal expansion, the movable block moves upward, and during contraction, the movable block is driven downward by the buffer part to ensure the airtightness between the movable blocks and the annular groove, thereby reducing the possibility of damage to the mold during thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0035] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0036] Figure 3 It is a structural diagram of two adjacent activity blocks.

[0037] Figure 4 It is a cross-sectional view of one of the movable blocks.

[0038] Figure 5 It is a cross-sectional view of several movable blocks.

[0039] Figure 6 It is a schematic diagram of the structure of the cooling pipe and the oil pipe.

[0040] Explanation of the reference numerals in the accompanying drawings: 1. upper die; 2. lower die; 3. annular groove; 4. annular block; 5. movable block; 6. ejection cylinder; 7. protrusion; 8. recessed portion; 9. thermal oil channel; 10. oil inlet channel; 11. oil outlet channel; 12. oil pipe; 13. cooling pipe; 14. spiral pipe; 15. bellows; 16. through groove; 17. abutment rod; 18. abutment block; 19. storage groove; 20. pressure sensor; 21. abutment spring. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-6 This application is described in further detail.

[0042] Reference Figure 1 A vehicle damping plate shaping equipment includes an upper mold 1 and a lower mold 2. The lower mold 2 is fixed, and the upper mold 1 can move up and down in the vertical direction. The upper end surface of the lower mold 2 is provided with an annular groove 3, and the annular groove 3 is used to place the semi-finished damping plate. The lower end surface of the upper mold 1 is integrally formed with an annular block 4, and the annular block 4 cooperates with the annular groove 3 to extrude the semi-finished damping plate to be shaped in the annular groove 3 to form a damping plate that meets the condition requirements.

[0043] Reference Figures 1 to 4 A plurality of movable blocks 5 are slidably arranged in the annular groove 3. The movable blocks 5 are spliced ​​head to tail to form an annular member. The lower die 2 is provided with a pressing mechanism for pressing the movable blocks 5 head to tail and pressing against the inner wall of the annular groove 3. The pressing mechanism includes an ejection cylinder 6 arranged below the lower die 2. A buffer is fixed at the end of the piston rod of the ejection cylinder 6. The buffer can be a spring. One end of the buffer is fixed to the end of the connecting rod of the ejection cylinder 6. The other end of the buffer is fixed to the movable block 5. The ejection cylinder 6 drives the movable block 5 to move up and down. The outer wall of the lower end of the annular groove 3 is inclined from top to bottom in a direction close to the axis of the annular groove 3, so that the angle between the outer wall of the lower end of the annular groove 3 and the horizontal bottom wall is α, which is an obtuse angle and can be selected between 92° and 95°, preferably 93°. The outer wall of the movable block 5 is consistent in shape with the outer wall of the lower end of the annular groove 3 and fits each other. When the ejection cylinder 6 drives the movable block 5 to move downward, under the action of the inclined surface of the outer wall of the annular groove 3, the movable block 5 moves toward the direction close to the center position, which is convenient for the tight fit between the movable blocks 5. The contact surface between the movable blocks 5 is wavy and fits each other. The wavy structure includes a protrusion 7 protruding outward and a concave portion 8 with the same shape and structure as the protrusion 7 and concave inward. The protrusion 7 is symmetrical on both sides of the wave crest and the tangent angle of the symmetrical position on both sides is 90°, which not only ensures the synchronization of adjacent molding blocks during the lifting process, but also further improves the sealing effect by increasing the length of the sealing surface.

[0044] Reference Figures 3 to 6 The movable block 5 is provided with heat transfer oil channels 9 which are interconnected, and one of the movable blocks 5 is provided with an oil inlet channel 10 and an oil outlet channel 11 which are connected to the outside. In order to prevent the hot oil from leaking out from the two adjacent heat transfer oil channels 9, countersunk grooves can be opened at both ends of the heat transfer oil channel 9, and a sealing gasket with an annular structure is installed in the countersunk groove. The sealing gasket can be made of polytetrafluoroethylene material, and the sealing gasket and the countersunk groove adopt an interference fit, which has a certain elasticity and meets the needs of thermal expansion and contraction.

[0045] Reference Figures 3 to 6 In other embodiments, in order to meet the needs of heating and cooling, oil pipes 12 are installed in the heat transfer oil channel 9, the oil inlet channel 10 and the oil outlet channel 11. Cooling pipes 13 for the flow of coolant are installed in the oil pipes 12. Bellows 15 connecting adjacent oil pipes 12 are provided on the oil pipes 12. Bellows 15 connecting adjacent cooling pipes 13 are also provided on the cooling pipes 13. During the process of thermal expansion and contraction, the bellows 15 has a certain degree of adjustability to meet the needs of elongation and shortening, thereby ensuring the stability of the connection between the oil pipes 12 and the oil pipes 12, and the cooling pipes 13 and the cooling pipes 13.

[0046] During the processing of the damping sheet, hot oil is first introduced to heat the movable block 5 to facilitate the shaping of the semi-finished damping sheet. After the damping sheet is extruded and formed, the hot oil is released and then coolant is introduced to cool it to facilitate the shaping of the damping sheet. The setting of the bellows 15 meets the requirements of thermal expansion and contraction during the heating and cooling process, and also facilitates the mutual movement and installation between the movable blocks 5.

[0047] Reference Figure 1 and Figure 6 Two spiral pipes 14 are provided in the upper mold 1 for heating and cooling the annular block 4 respectively. The two spiral pipes 14 correspond to the oil pipe 12 and the cooling pipe 13. During the processing, hot oil is transported through one of the spiral pipes 14 to heat the annular block 4, and the oil pipe 12 heats the movable block 5 at the same time. On the one hand, the heating efficiency is improved, and on the other hand, the damping plate is heated evenly to improve the product quality. After the product is formed, the hot oil is discharged and the coolant is introduced into the other spiral pipe 14, and the coolant is introduced into the cooling pipe 13 at the same time, which is convenient for cooling and shaping of the damping plate.

[0048] Reference Figure 1 A through groove 16 is provided on the annular block 4 along its axial direction, and an abutment rod 17 is slidably provided in the through groove 16. An abutment block 18 is fixedly connected to the lower end of the abutment rod 17. A receiving groove 19 for accommodating the abutment block 18 is provided at the lower end of the annular block 4. A pressure sensor 20 is fixed in the receiving groove 19. When the abutment block 18 is located in the receiving groove 19, the abutment block 18 abuts against the pressure sensor 20, and the lower end surface of the abutment block 18 is flush with and smoothly connected to the lower end surface of the annular block 4. An abutment spring 21 is provided in the through groove 16, and one end of the abutment spring 21 is fixed to the inner wall of the through groove 16, and the other end is fixed to the abutment rod 17 and pushes the abutment rod 17 to move downward.

[0049] When the annular block 4 moves downward in the annular groove 3, air is discharged from the through groove 16, which facilitates the downward movement of the annular block 4. The abutment block 18 gradually contacts the semi-finished damping sheet. As the annular block 4 continues to move downward, the semi-finished damping sheet pushes the abutment block 18 to move upward relative to the annular block 4, so that the abutment block 18 moves into the receiving groove 19 and closes the receiving groove 19, preventing the damping sheet deformed during the extrusion process from extending into the receiving groove 19. In the process of extruding the semi-finished damping sheet, the annular block 4 acts on the pressure sensor 20 through the abutment block 18, and judges the overall pressure through the local, which facilitates pressure control.

[0050] The application also discloses a shaping method for an automobile damping sheet using the shaping device, comprising the following steps:

[0051] S1, the ejection cylinder 6 drives the movable block 5 to move downward, so that the movable blocks 5 and the inner and outer side walls of the annular groove 3 are pressed tightly against each other;

[0052] S2, continuously introduce hot oil into the oil pipe 12 and one of the spiral pipes 14 to preheat the lower mold 2 and the upper mold 1;

[0053] S3, placing the semi-finished damping sheet into the annular groove 3, the upper mold 1 moves downward, the air is discharged from the through groove 16, the annular block 4 is inserted into the annular groove 3, and the semi-finished damping sheet is extruded. During the extrusion process, the hot oil heats the semi-finished damping sheet to facilitate the shaping of the damping sheet;

[0054] S4, after the extrusion is completed, the hot oil in the oil pipe 12 is led out, and the coolant is passed into the coolant and another spiral pipe 14, so that the coolant circulates, which is convenient for cooling the mold and shaping the damping plate;

[0055] S5. After the product is cooled and formed, the upper mold 1 moves upward and the abutment rod 17 moves downward to facilitate the air to enter the annular groove 3. The annular block 4 leaves the annular groove 3, and the ejection cylinder 6 drives the movable block 5 to move upward to facilitate ejecting the formed product.

[0056] The implementation principle of the embodiment of the present application is as follows: the movable block 5 moves downward and moves in a direction close to the center, between the movable blocks 5 and the inner wall of the annular groove 3, the semi-finished damping sheet is placed in the annular groove 3, and the mold is heated to facilitate shaping of the semi-finished damping sheet. The annular block 4 works together with the movable block 5 in the annular groove 3 to extrude the semi-finished damping sheet to form the damping sheet. The shaping of the damping sheet is facilitated by cooling the mold. During the production process, due to alternating hot and cold, during thermal expansion, the movable block 5 moves upward through the buffer, and during contraction, the movable block 5 is driven to move downward through the buffer, thereby ensuring the airtightness between the movable blocks 5 and the movable blocks 5, and the movable block 5 and the annular groove 3, and reducing the possibility of damage to the mold during thermal expansion and contraction.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vehicle damping plate shaping device, comprising an upper die (1) moving in the vertical direction and a fixed lower die (2), the lower die (2) being provided with an annular groove (3) for shaping, and an annular block (4) cooperating with the annular groove (3) being integrally formed on the lower surface of the upper die (1), characterized in that: A plurality of movable blocks (5) are slidably arranged in the annular groove (3), and the movable blocks (5) are spliced ​​end to end to form an annular member. The lower die (2) is provided with a tightening mechanism for tightening the movable blocks (5) end to end and against the inner wall of the annular groove (3).

2. The automobile damping plate shaping device according to claim 1, characterized in that: The tightening mechanism comprises an ejection oil cylinder (6) arranged below the lower die (2) and driving the movable block (5) to move up and down. A buffer member having a buffering and adjusting function is fixed on the ejection oil cylinder (6). The outer wall of the lower end of the annular groove (3) is inclined from top to bottom in a direction close to the axis of the annular groove (3), so that the angle between the outer wall of the lower end of the annular groove (3) and the horizontal bottom wall is α, and α is an obtuse angle. The outer wall of the movable block (5) and the outer wall of the lower end of the annular groove (3) have the same shape and fit each other.

3. The automobile damping plate shaping device according to claim 2, characterized in that: The contact surfaces between the movable blocks (5) are wavy and fit each other.

4. The automobile damping plate shaping device according to claim 3 is characterized in that: The wave-shaped structure of the movable block (5) comprises a protruding portion (7) protruding outward and a recessed portion (8) having the same shape and structure as the protruding portion (7) and recessed inward, wherein the protruding portion (7) is symmetrical on both sides of the wave crest and the tangent angle at the symmetrical positions on both sides is 90°.

5. The automobile damping plate shaping device according to claim 4, characterized in that: The movable blocks (5) are provided with interconnected heat transfer oil channels (9), wherein one of the movable blocks (5) is provided with an oil inlet channel (10) and an oil outlet channel (11) connected to the outside.

6. The automobile damping plate shaping device according to claim 5, characterized in that: The heat transfer oil channel (9) is provided with a sealing gasket which connects two adjacent heat transfer oil channels (9) and performs a sealing function.

7. The automobile damping plate shaping device according to claim 5, characterized in that: The heat transfer oil channel (9), the oil inlet channel (10) and the oil outlet channel (11) are provided with oil pipes (12), the oil pipes (12) are provided with cooling pipes (13) for the flow of coolant, and corrugated pipes (15) are provided between two adjacent movable blocks (5) and are respectively connected to the corresponding oil pipes (12) and cooling pipes (13).

8. The automobile damping plate shaping device according to claim 7, characterized in that: Two spiral pipes (14) for heating and cooling the annular block (4) are arranged in the upper mold (1).

9. The automobile damping plate shaping device according to claim 1, characterized in that: The annular block (4) is provided with a through groove (16) along its axial direction, an abutment rod (17) is slidably arranged in the through groove (16), the lower end of the abutment rod (17) is connected to an abutment block (18), and a receiving groove (19) for receiving the abutment block (18) is provided at the lower end of the annular block (4). When the abutment block (18) is located in the receiving groove (19), the abutment block (18) is smoothly connected to the annular block (4) and the lower end surface is flush with the lower end surface of the annular block (4). An abutment spring (21) for pushing the abutment rod (17) to move downward is arranged in the through groove (16), and a pressure sensor (20) for detecting the pressure of the abutment block (18) is installed in the receiving groove (19).

10. A method for shaping a vehicle damping sheet using the shaping device according to any one of claims 2 to 9, characterized in that: The following steps are involved: S1, the ejection oil cylinder (6) drives the movable block (5) to move downward, so that the movable blocks (5) and the movable blocks (5) are pressed tightly against the inner and outer side walls of the annular groove (3); S2, continuously introducing hot oil into the oil pipe (12) to preheat the lower mold (2); S3, placing the semi-finished damping sheet to be formed into the annular groove (3), the upper mold (1) moves downward, and the annular block (4) is inserted into the annular groove (3) to extrude the semi-finished damping sheet to be formed; S4, after the extrusion is completed, the hot oil in the oil pipe (12) is discharged, so that the coolant enters the cooling pipe (13) and circulates in the cooling pipe (13); S5. After the product is cooled and formed, the upper mold (1) moves upward, and the ejection cylinder (6) drives the movable block (5) to move upward, so as to eject the formed product.

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