Automobile damping plate shaping device and automobile damping plate shaping method

Abstract

The present application relates to a shaping device for automobile damping plates and a shaping method for automobile damping plates, and relates to the technical field of damping plate shaping devices. The shaping device includes an upper die moving in the vertical direction and a fixed lower die, the lower die is provided with an annular groove for shaping, and an annular block cooperating with the annular groove is integrally formed on the lower surface of the upper die, and a plurality of movable blocks are slidingly arranged in the annular groove, and the movable blocks are spliced ​​end to end to form an annular member, and a tightening mechanism is arranged on the lower die to make the movable blocks press against the inner wall of the annular groove. The present application has the effect of improving product quality while reducing the possibility of mold damage.

Description

Technical Field

[0001] This application relates to the technical field of damping sheet shaping equipment, and in particular to an automobile damping sheet shaping equipment and a shaping method for automobile damping sheets. Background Art

[0002] Automobile damping sheets, also known as mastic or damping blocks, are viscoelastic materials mainly used to be pasted on the inner surface of the vehicle body, closely attached to the steel plate wall of the vehicle body. Their main function is to reduce noise and vibration, improving driving comfort and the overall performance of the vehicle.

[0003] The manufacturing process of damping sheets is relatively complex, but the core steps are clear. First, appropriate raw materials are selected, which usually include polymer resin materials or rubber materials with excellent physical and chemical properties such as vibration and noise reduction, heat resistance, cold resistance, anti-aging properties, and extremely strong adhesiveness. In addition, some auxiliary materials such as fillers and oils may be added to enhance their performance. The uniformly mixed raw materials are then fed into an extruder for extrusion molding. During the extrusion process, it is necessary to maintain the stability of temperature, pressure, and extrusion speed to ensure that the product has good appearance, dimensions, and performance. In the extrusion molding step, the damping material is plasticized into the required shape, such as a sheet or a strip, through the rotation and pushing of the screw of the extruder. Subsequently, these semi-finished damping sheets enter the shaping step.

[0004] Currently, the commonly used automobile damping sheet shaping equipment on the market mainly includes components such as shaping molds, shaping cylinders, heating devices, and control systems. Shaping molds are usually made of high-strength and highly wear-resistant materials to ensure their service life and shaping accuracy. The shaping cylinder is responsible for providing sufficient pressure to enable the damping sheet to closely fit 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 sheet can maintain appropriate softening and fluidity during the shaping process.

[0005] In the Chinese patent with the publication number CN214026780U, a shaping device for automobile damping sheets is disclosed, 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. The piston rod of the first telescopic cylinder penetrates through the top plate and a pressure sensor is fixedly provided at the lower end. An installation plate is fixedly provided under the pressure sensor. An upper shaping press head is fixedly provided under the installation plate. A limiting device is provided on the installation plate. A guiding device is provided under the shaping press head. An annular shaping groove is opened at the upper end of the shaping mold. An annular ejector plate is fixedly provided under the annular shaping groove. A number of second telescopic cylinders are fixedly provided under the annular ejector plate. The cylinder bodies of the second telescopic cylinders are fixedly embedded at the lower end of the shaping mold.

[0006] In view of the related technologies described above, the inventor believes that when the damping sheet to be formed is placed in the annular shaping groove, through the combined action of the annular ejector plate and the shaping press head, the damping sheet is processed into the required shape. However, during the processing, due to reasons such as thermal expansion and contraction, an interference fit or a clearance fit may occur between the annular shaping groove and the annular ejector plate. On the one hand, it will affect the product quality, and on the other hand, due to thermal expansion, the movement of the annular ejector plate will be difficult, and it is easy to cause damage to the mold. Summary of the Invention

[0007] In order to improve the product quality and reduce the possibility of mold damage at the same time, the present application provides an automobile damping sheet shaping device and a shaping method for an automobile damping sheet.

[0008] In the first aspect, an automobile damping sheet shaping device provided by the present application adopts the following technical solution:

[0009] An automobile damping sheet shaping device includes an upper mold moving in the vertical direction and a fixed lower mold. An annular groove for shaping is provided on the lower mold, and an annular block matching the annular groove is integrally formed on the lower surface of the upper mold. A plurality of movable blocks are slidably arranged in the annular groove, and the movable blocks are spliced end to end to form an annular member. A tightening mechanism for making the movable blocks abut against each other end to end and abut against the inner wall of the annular groove is provided on the lower mold.

[0010] By adopting the above technical solution, during the processing, the staff first acts on the tightening mechanism to make the movable blocks move downward. The movable blocks abut against each other and against the inner walls on both sides of the annular groove, avoiding gaps between them. Then, the semi-finished damping sheet 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 into the annular groove to extrude the semi-finished damping sheet to form the required damping sheet. Since the movable blocks are independent of each other, during the processing, they can cooperate with the clamping mechanism and adjust each other during thermal expansion and contraction, reducing the possibility of mold damage.

[0011] Optionally, the tightening mechanism includes an ejector oil cylinder arranged below the lower mold and driving the movable blocks to move up and down. A buffer member for buffering and adjusting is fixed on the ejector oil cylinder. The outer wall of the lower end of the annular groove is inclined from top to bottom in a direction approaching the axis of the annular groove, so that the included 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 has the same shape as and is in close fit with the outer wall of the lower end of the annular groove.

[0012] By adopting the above technical solution, the included 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 ejector oil cylinder drives the movable blocks to move downward, the movable blocks move towards the center position, which is convenient for the movable blocks to converge and fit closely. At the same time, a certain chamfer can be formed at the outer edge position of the lower surface of the damping sheet, making the overall structure more smooth.

[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, increasing the contact area between the movable blocks, ensuring the synchronism of adjacent forming blocks during the lifting process, and further improving the sealing effect by increasing the length of the sealing surface.

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

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

[0017] Optionally, the movable block is provided with heat-conducting oil channels communicating with each other, and 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-conducting oil channels are used to introduce hot oil to heat the mold and the semi-finished damping sheet, facilitating the extrusion molding of the damping sheet in the later stage.

[0019] Optionally, a gasket for connecting adjacent two heat-conducting oil channels and playing a sealing role is arranged on the heat-conducting oil channels.

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

[0021] Optionally, a tubing is installed in the heat-conducting oil channels, the oil inlet channel and the oil outlet channel, a cooling pipe for the flow of coolant is installed in the tubing, and bellows connecting the corresponding tubing and the cooling pipe are arranged between adjacent two movable blocks.

[0022] By adopting the above technical solution, after the damping sheet is processed, the staff can export the hot oil in the heat-conducting oil channels, and then introduce cooling water into the cooling pipe, facilitating the cooling of the mold and the product and facilitating the shaping of the damping sheet.

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

[0024] By adopting the above technical solution, the two spiral pipes are respectively used to introduce coolant and hot oil, which cooperate with the cooling pipes and oil channels below to improve the overall processing efficiency, and at the same time make the temperature of the upper and lower parts of the mold more uniform, improving the overall quality of the product.

[0025] Optionally, a through groove is axially formed in the annular block, a contact rod is slidably arranged in the through groove, a contact block is connected to the lower end of the contact rod, a receiving groove for receiving the contact block is formed at the lower end of the annular block. When the contact block is located in the receiving groove, the contact block is smoothly connected to the annular block and the lower end surface is flush with the lower end surface of the annular block. A contact spring for pushing the contact rod downward is arranged in the through groove, and a pressure sensor for detecting the pressure of the contact block is installed in the receiving groove.

[0026] By adopting the above technical solution, the contact rod is provided to balance the negative pressure in the annular groove during the processing. When the annular block moves into the annular groove, it 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 contact spring, the contact 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 provided to detect the pressure of the damping piece during the processing to facilitate the control of the pressure.

[0027] In a second aspect, the present application also provides a method for shaping an automotive damping piece by applying the above shaping equipment, including the following steps:

[0028] S1. The ejecting oil cylinder drives the movable block to move downward, so that the movable block is tightly abutted against the inner and outer side walls of the movable block and the annular groove;

[0029] S2. Continuously introduce hot oil into the oil pipe to preheat the lower mold;

[0030] S3. Place the semi-finished damping piece to be formed into the annular groove, the upper mold moves downward, and the annular block is inserted into the annular groove to extrude the semi-finished damping piece to be formed;

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

[0032] S5. Wait for the product to cool and form, the upper mold moves upward, and the ejecting oil cylinder drives the movable block to move upward to facilitate ejecting the formed product.

[0033] In summary, the beneficial technical effects of the present invention are as follows: The movable block moves downward and towards the center. Between the movable blocks and against the inner wall of the annular groove, the semi-finished damping sheet is placed in the annular groove. Heating facilitates the deformation of the semi-finished damping sheet, and cooling facilitates the shaping of the damping sheet. During the production process, there will be alternating heat and cold. During the thermal expansion process, the movable block moves upward. During the cold shrinkage process, the buffer member drives the movable block to move downward to ensure the tightness between the movable blocks and between the movable block and the annular groove, reducing the possibility of damage during the thermal expansion and contraction of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0035] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0036] Figure 3 a schematic diagram of two adjacent movable blocks.

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

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

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

[0040] Description of the reference numerals: 1. upper mold; 2. lower mold; 3. annular groove; 4. annular block; 5. movable block; 6. ejecting oil cylinder; 7. protrusion; 8. depression; 9. heat-conducting 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. abutting rod; 18. abutting block; 19. receiving groove; 20. pressure sensor; 21. abutting spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following further elaborates on the present application Figures 1-6 with reference to the accompanying drawings.

[0042] Referring to Figure 1 , an automotive damping sheet shaping device 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. An annular groove 3 is formed on the upper end surface of the lower mold 2 for placing the semi-finished damping sheet. An annular block 4 is integrally formed on the lower end surface of the upper mold 1. The annular block 4 cooperates with the annular groove 3 to extrude the semi-finished damping sheet to be shaped in the annular groove 3 to form a damping sheet that meets the requirements.

[0043] Referring toFigures 1 to 4 Inside the annular groove 3, a number of movable blocks 5 are slidably arranged. The movable blocks 5 are spliced end to end to form an annular member. On the lower die 2, a tightening mechanism is provided to make the ends of the movable blocks 5 abut tightly against each other and against the inner wall of the annular groove 3. The tightening mechanism includes an ejecting oil cylinder 6 arranged below the lower die 2. A buffer member is fixed to the end of the piston rod of the ejecting oil cylinder 6. The buffer member can be a spring. One end of the buffer member is fixed to the end of the connecting rod of the ejecting oil cylinder 6, and the other end of the buffer member is fixed to the movable block 5. The movable block 5 is driven to move up and down by the ejecting oil cylinder 6. The outer side wall of the lower end of the annular groove 3 is inclined from top to bottom in a direction approaching the axis of the annular groove 3, so that the included angle between the outer side wall of the lower end of the annular groove 3 and the horizontal bottom wall is α, and α is an obtuse angle, which can be selected between 92° and 95°, preferably 93°. The outer side wall of the movable block 5 has the same shape as the outer side wall of the lower end of the annular groove 3 and fits each other. When the ejecting oil cylinder 6 drives the movable block 5 to move downward, under the action of the inclined plane of the outer side wall of the annular groove 3, the movable block 5 moves towards the center position, facilitating the close fitting between the movable blocks 5. The contact surfaces between the movable blocks 5 are wavy and fit each other. The wavy structure includes 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. The protruding portion 7 is symmetric on both sides of the wave crest, and the tangent included angle at the symmetric positions on both sides is 90°. This not only ensures the synchronism of adjacent forming blocks during the lifting and lowering process but also further improves the sealing effect by increasing the length of the sealing surface.

[0044] Refer to Figures 3 to 6 On the movable block 5, there are heat-conducting oil channels 9 that communicate with each other. On one of the movable blocks 5, there are an oil inlet channel 10 and an oil outlet channel 11 connected to the outside. In order to prevent hot oil from seeping out from adjacent two heat-conducting oil channels 9, counterbore grooves can be opened at both ends of the heat-conducting oil channels 9, and a ring-shaped gasket is installed in the counterbore grooves. The gasket can be made of polytetrafluoroethylene material. The gasket and the counterbore groove are in an interference fit manner, having a certain elasticity to meet the requirements of thermal expansion and contraction.

[0045] Refer to Figures 3 to 6 In other embodiments, in order to meet the requirements of heating and cooling, a tubing 12 is installed in the heat-conducting oil channels 9, the oil inlet channel 10, and the oil outlet channel 11. A cooling pipe 13 for the flow of coolant is installed in the tubing 12. A bellows 15 for connecting adjacent tubings 12 is provided on the tubing 12. Similarly, a bellows 15 for connecting adjacent cooling pipes 13 is provided on the cooling pipe 13. During the process of thermal expansion and contraction, the bellows 15 has a certain adjustability to meet the requirements of elongation and shortening, ensuring the stability of the connection between the tubing 12 and the tubing 12, and between the cooling pipe 13 and the cooling pipe 13.

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

[0047] Refer to Figure 1 and Figure 6 In the upper die 1, two spiral pipes 14 for heating and cooling the annular block 4 respectively are arranged. The two spiral pipes 14 correspond to the oil pipe 12 and the cooling pipe 13. During the processing, hot oil is conveyed through one of the spiral pipes 14 to heat the annular block 4. At the same time, the oil pipe 12 heats the movable block 5. On the one hand, the heating efficiency is improved, and on the other hand, the damping sheet is evenly heated, improving the product quality. After the product is formed, the hot oil is discharged, and coolant is introduced into the other spiral pipe 14, and at the same time, coolant is introduced into the cooling pipe 13 to facilitate the cooling and setting of the damping sheet.

[0048] Refer to Figure 1 An axial through groove 16 is formed in the annular block 4. A contact rod 17 is slidably arranged in the through groove 16. The lower end of the contact rod 17 is fixedly connected with a contact block 18. A receiving groove 19 for receiving the contact block 18 is formed at the lower end of the annular block 4. A pressure sensor 20 is fixed in the receiving groove 19. When the contact block 18 is located in the receiving groove 19, the contact block 18 presses tightly on the pressure sensor 20. The lower end surface of the contact block 18 is flush with and smoothly connected to the lower end surface of the annular block 4. A contact spring 21 is arranged in the through groove 16. One end of the contact spring 21 is fixed to the inner wall of the through groove 16, and the other end is fixed to the contact rod 17 and pushes the contact rod 17 downward.

[0049] During the downward movement of the annular block 4 in the annular groove 3, air is discharged from the through groove 16, facilitating the downward movement of the annular block 4. The contact block 18 gradually contacts the semi-finished damping sheet. During the continuous downward movement of the annular block 4, the semi-finished damping sheet pushes the contact block 18 to move upward relative to the annular block 4, so that the contact block 18 moves into the receiving groove 19 and closes the receiving groove 19, preventing the deformed damping sheet during the extrusion process from extending into the receiving groove 19. During the extrusion of the semi-finished damping sheet by the annular block 4, the pressure sensor 20 is acted on through the contact block 18, and the pressure received by the whole is judged through the part, facilitating the control of the pressure.

[0050] The application also discloses a method for setting an automotive damping sheet using the above setting device, including the following steps:

[0051] S1. The ejector oil cylinder 6 drives the movable block 5 to move downward, so that the movable block 5 is tightly pressed against the inner and outer side walls of the movable block 5 and the annular groove 3.

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

[0053] S3. Place the semi-finished damping sheet into the annular groove 3. The upper die 1 moves downward, air is discharged from the through groove 16, and the annular block 4 is inserted into the annular groove 3 to extrude the semi-finished damping sheet. 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, export the hot oil in the oil pipe 12, introduce coolant into the coolant and the other spiral pipe 14, and make the coolant circulate to facilitate the cooling of the mold and the shaping of the damping sheet at the same time;

[0055] S5. Wait for the product to cool and form. The upper die 1 moves upward, and the abutting rod 17 moves downward to facilitate air entering the annular groove 3. The annular block 4 leaves the annular groove 3, and the ejecting oil 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 towards the center. Between the movable blocks 5 and between the movable block 5 and the inner wall of the annular groove 3, they are tightly abutted. The semi-finished damping sheet is placed into the annular groove 3, and the mold is heated to facilitate the shaping of the semi-finished damping sheet. The annular block 4 and the movable block 5 act together in the annular groove 3 to extrude the semi-finished damping sheet to form the damping sheet. By cooling the mold, it is convenient for the shaping of the damping sheet. During the production process, due to the alternation of heat and cold, during the thermal expansion process, through the buffer member, the movable block 5 moves upward, and during the cold shrinkage process, the buffer member drives the movable block 5 to move downward to ensure the tightness between the movable blocks 5, between the movable block 5 and the annular groove 3, and reduce the possibility of damage to the mold during the thermal expansion and contraction process.

[0057] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within 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 pressing mechanism for pressing the movable blocks (5) end to end and pressing against the inner wall of the annular groove (3); the pressing mechanism comprises an ejection oil cylinder (6) arranged below the lower die (2) and driving the movable blocks (5) to move up and down, and a buffer member having a buffering and regulating 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) are consistent in shape and fit each other; the contact surfaces between the movable blocks (5) are wavy and fit each other.

2. The automobile damping plate shaping device according to claim 1, 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°.

3. The automobile damping plate shaping device according to claim 2, 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.

4. The automobile damping plate shaping device according to claim 3 is 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.

5. The automobile damping plate shaping device according to claim 4, 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).

6. The automobile damping plate shaping device according to claim 5, characterized in that: Two spiral pipes (14) for heating and cooling the annular block (4) are arranged in the upper mold (1).

7. 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).

8. A method for shaping a vehicle damping sheet using the shaping device as claimed in any one of claims 5 to 6, 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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