Hover pre-press forming die for automobile stamping and its forming method

Abstract

The application discloses a hovering pre-press forming die for automobile stamping parts and a forming method thereof, and particularly relates to the technical field of automobile part forming equipment. The baked stamping part enters into the forming outer seat through a feeding port and is located on the top surface of the inner mold seat. The feeding of the stamping part is assisted by the column block. The movable die head is completely attached to the inner cavity bottom surface of the inner mold seat, so that stamping forming is realized. The edges of the stamping part are synchronously cut by the cutting assembly. The waste after cutting is fed into the blanking frame through the blanking cavity. Then, the movement of the top lifting block is driven by the linkage ejection assembly, so that the product after forming is lifted for convenient taking out. In the rotating process, the blanking frame does not rise, and continues to rotate. The height of the top surface of the blanking frame is ejected to the height that is flush with the top surface of the inner mold seat, so that the cut waste in the blanking frame can be taken out conveniently. The automatic ejection of the formed product and the cut waste is realized in turn, and the forming of the next stamping part is facilitated.

Description

Technical Field

[0001] This invention relates to the field of automotive parts molding equipment technology, specifically to a hovering pre-compression molding die for automotive molded parts and its molding method. Background Technology

[0002] The side panel refers to a part of the car body structure, which usually includes the front fender, engine hood, front and rear doors, roof and rear fender. The side panel is usually made of metal materials, such as steel, aluminum alloy and non-metallic materials. Stamping dies are an important part of automobile production. At present, the body stamping parts are mainly made by cold stamping.

[0003] Existing automotive trunk side panel trim products suffer from shrinkage during baking and molding due to the inherent characteristics of the raw materials. Furthermore, the complex shapes of the side panels result in significant stretching. During pre-pressing, the short contact time between the upper and lower molds leads to insufficient and uneven bonding between the molded parts and the lower mold, causing shrinkage and material shortages in some areas, resulting in a high defect rate. Additionally, excess material remains at the product edges during molding, requiring edge trimming after molding. The conventional method involves ejecting the product and then trimming the edges, adding to the work process. Summary of the Invention

[0004] The purpose of this invention is to provide a hovering pre-compression molding die and its molding method for automotive molded parts, so as to solve the problems mentioned in the background art.

[0005] This invention can be achieved through the following technical solution: a hovering pre-compression molding die for automotive molded parts, comprising a molding platform, an outer molding seat mounted on the top surface of the molding platform, an inner mold seat snapped into the inner molding seat, a moving mold disposed above the inner mold seat, a moving die head mounted on the bottom surface of the moving die for cooperating with the inner mold seat and molding the molded part, and a cutting component for cutting the edge of the molded part installed inside the moving die, and two ejectors for ejecting the molded product mounted on the bottom surface of the inner cavity of the inner mold seat. The inner mold base has a lifting block, and a material discharge chamber is provided between the outer wall of the inner mold base and the inner wall of the outer molding base to cut off the waste material entering. A material discharge frame is slidably installed inside the material discharge chamber. The inner wall of the material discharge frame is set as a slope. A linkage ejection component is installed in the cavity inside the outer molding base to first eject the molded product and then lift the material discharge frame. A material inlet is provided on one side surface of the outer molding base. The top surface of the material inlet is lower than the top surface of the inner mold base. A column block with the same height as the top surface of the inner mold base is provided on the surface of the material inlet to assist in feeding.

[0006] A further technical improvement of the present invention is that: the linkage ejection assembly includes a drive shaft disposed in the cavity of the forming outer seat and driven by a servo motor, a driven shaft is disposed on one side of the drive shaft, gears are fixedly sleeved on the outer surfaces of the drive shaft and the driven shaft, the two gears mesh with each other, and a swing arm rod is fixedly connected to the end of the drive shaft and the driven shaft for sequentially lifting the lifting block and the dropping frame. A limiting push rod is mounted on the bottom surface of the lifting block, which limits the sliding of the lifting block in the cavity of the forming outer seat in the vertical direction. A sliding column is fixed on the surface of the limiting push rod, and a sliding groove is provided on the surface of each swing arm rod that slides with the sliding column.

[0007] The end surface of the swing arm is provided with an arc-shaped guide groove, and the end of the arc-shaped guide groove is connected to a sliding groove. A limiting push rod is fixedly attached to the bottom surface of the material dropping frame. A sliding column is fixedly attached to the surface of the limiting push rod. The sliding column slides in the arc-shaped guide groove and the sliding groove.

[0008] A further technical improvement of the present invention is that: the bottom surface of the inner cavity of the outer mold base is provided with a plurality of bearing bases, and the bottom surface of the inner mold base is equipped with a support rod that cooperates with the plurality of bearing bases.

[0009] A further technical improvement of the present invention is that: the cutting assembly includes a horizontal plate slidably disposed in the inner cavity of the moving mold, the bottom surface of the moving mold is provided with a through groove communicating with its inner cavity, and the top surface of the inner cavity of the moving mold is equipped with connecting columns located on both sides of the horizontal plate, the ends of the two connecting columns are connected to a fixing plate disposed inside the through groove, and the two ends of the bottom surface of the horizontal plate are provided with a cutter that moves through the inside of the through groove, the cutter being used to cut the edge of the molded part.

[0010] A further technical improvement of the present invention is that: the bottom surfaces of the moving mold and the fixed plate are provided with collinear and interconnected mounting grooves, and a support strip is slidably engaged inside the mounting groove, and the bottom surface of the support strip is fixed to the top surface of the moving mold head.

[0011] A further technical improvement of the present invention is that: one mounting groove on the moving mold is open, the other mounting groove on the moving mold is closed and communicates with the through hole on the moving mold, a stud is fixed to the end surface of the support bar, and a wing nut sleeve is rotatably installed on the surface of the moving mold and outside the through hole, and the end of the stud passes through the through hole and is threadedly connected to the wing nut sleeve.

[0012] A further technical improvement of the present invention is that: a buffer seat is installed on the bottom surface of the moving mold, and a strip-shaped pressure plate for pressing the edge of the molded part is elastically connected inside the buffer seat; and a segmented stroke cylinder is provided above the moving mold, the segmented stroke cylinder is installed on a stabilizing plate above the forming table, and a limiting rod that slides with the moving mold is provided on the bottom surface of the stabilizing plate.

[0013] A further technical improvement of the present invention is that the interior of the moving mold head is configured as a hollow structure, and the water inlet and outlet on one side of the moving mold head are connected to the circulating cooling water tank through a circulation pipe.

[0014] The present invention also provides a molding method for a hovering pre-compression molding die for automotive molded parts, the molding method specifically including the following steps:

[0015] Step 1: The baked molded part enters the top surface of the inner mold base through the column block on the feed port. The segmented stroke cylinder pushes the moving mold and the moving mold head to press down synchronously, and the strip pressure plate initially fixes the top surface of the molded part.

[0016] Step 2: The moving mold and moving mold head continue to press down, pressing down to the bottom surface of the inner cavity of the inner mold base through the moving mold head, and hovering for 5-10 seconds. Then, the push cylinder synchronously drives the horizontal plate to drive the cutter to cut the edge of the molded part. The waste material after cutting enters the blanking frame through the blanking cavity.

[0017] Step 3: The linkage ejection component first drives the limiting push rod one to slide within the cavity of the molding outer seat and lifts the molded product out through the lifting block. After continuing to rotate, the sliding column two at the end of the swing arm slides from the arc-shaped guide groove to the sliding groove two. Through the sliding of the sliding groove two and the sliding column two, the limiting push rod two is lifted. The limiting push rod two then pushes the top surface of the blanking frame out to a height that is flush with the top surface of the inner mold seat.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The molded part is fed into the outer mold base through the feed port and is located on the top surface of the inner mold base. The column block assists in feeding the molded part. Then, the moving mold drives the moving mold head to move downward synchronously towards the inner cavity of the inner mold base until the moving mold head is completely in contact with the bottom surface of the inner cavity of the inner mold base to achieve stamping. The cutting component cuts the edge of the molded part synchronously. The waste material after cutting enters the blanking frame through the blanking cavity. Then, the linkage ejection component drives the lifting block to move, lifting the molded product for easy removal. During the rotation, the blanking frame does not rise. It continues to rotate, pushing the top surface of the blanking frame to a height that is flush with the top surface of the inner mold base, so as to facilitate the removal of the cutting waste in the blanking frame. The automatic ejection of the molded product and the cutting waste is realized in sequence, which facilitates the molding of the next molded part.

[0020] 2. The snap-fit ​​installation of the inner mold base and the outer forming base facilitates the replacement of the inner mold base, while the sliding snap-fit ​​installation of the moving mold head and the moving mold ensures the stability of the moving mold head during stamping when the stud thread enters the interior of the wing nut sleeve. After the moving mold head is removed, it is easy to replace it with a size that matches the inner mold base, adapting to the stamping of different molded parts and obtaining different products.

[0021] 3. The cutter is located in the inner cavity of the moving mold and has a hidden design. When the molded part is being formed and stamped, the horizontal plate is pushed synchronously by two propulsion cylinders to slide in the inner cavity of the moving mold. The horizontal plate drives the cutter to cut the molded part after pressing, thereby cutting off the edge of the molded part. The cut-off edge waste falls into the blanking box for centralized collection, improving the utilization rate and reducing the steps of cutting off the edge of subsequent products.

[0022] 4. The segmented stroke cylinder moves in two stages. The first stage pushes the strip pressure plate into contact with the molded part on the top surface of the inner mold base. The segmented stroke cylinder continues to push, and the moving mold head presses the molded part to the bottom to form it. The strip pressure plate enters the interior of the buffer seat to achieve the buffering of the stamping. The segmented stroke cylinder is then suspended for 5-10 seconds to reduce the shrinkage and material shortage defects at the edge of the product and improve the molding quality. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the mounting structure of the cutter of the present invention;

[0026] Figure 3 This is a three-dimensional structural diagram of the cutter and cross plate of the present invention;

[0027] Figure 4 This is a cross-sectional view of the outer molding base and inner mold base of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the lifting block and the moving mold from another angle of the present invention;

[0029] Figure 6 For the present invention Figure 5 A magnified view of a portion of point A in the middle.

[0030] In the diagram: 1. Forming table; 2. Forming outer seat; 3. Segmented stroke cylinder; 4. Limiting rod; 5. Moving mold; 6. Moving mold head; 7. Inner mold seat; 8. Blanking cavity; 9. Feed port; 10. Lifting block; 11. Pushing cylinder; 12. Connecting column; 13. Horizontal plate; 14. Through slot; 15. Cutting knife; 16. Buffer seat; 17. Strip pressure plate; 18. Stud; 19. Mounting slot; 20. Fixing plate; 21. Wing nut sleeve; 22. Blanking frame; 23. Drive shaft; 24. Gear; 25. Swing arm; 26. Sliding groove one; 27. Sliding column one; 28. Limiting push rod one; 29. ​​Support rod; 30. Bearing base; 31. Arc-shaped guide groove; 32. Sliding groove two; 33. Sliding column two; 34. Limiting push rod two; 35. Support bar. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0032] Please see Figures 1-6 As shown, the present invention provides a hovering pre-compression molding die for automotive molded parts, including a molding platform 1, an outer molding seat 2 mounted on the top surface of the molding platform 1, an inner mold seat 7 snapped into the inner molding seat 2, a movable mold 5 disposed above the inner mold seat 7, a movable mold head 6 mounted on the bottom surface of the movable mold 5 for cooperating with the inner mold seat 7 and molding the molded part, and a cutting component for cutting the edge of the molded part installed inside the movable mold 5, and two lifting blocks 10 for ejecting the molded product mounted on the bottom surface of the inner cavity of the inner mold seat 7, and the outer wall surface of the inner mold seat 7 and the inner surface of the outer molding seat 2 are connected. A discharge chamber 8 is provided between the walls to cut off the entry of waste material. A discharge frame 22 is slidably installed inside the discharge chamber 8. The inner wall of the discharge frame 22 is set as a slope, with outward receiving space. A linkage ejection component is installed in the cavity inside the molding outer seat 2, which first ejects the molded product and then lifts the discharge frame 22. A feed port 9 is provided on one side surface of the molding outer seat 2. The top surface of the feed port 9 is lower than the top surface of the inner mold base 7. A column block with the same height as the top surface of the inner mold base 7 is provided on the surface of the feed port 9 to assist feeding. The baked molded part enters the molded part through the feed port 9. The outer mold base 2 is located on the top surface of the inner mold base 7, and the column block assists in feeding the molded part. Then, the moving mold 5 drives the moving mold head 6 to move downwards synchronously, approaching the inner cavity of the inner mold base 7 until the moving mold head 6 is completely in contact with the bottom surface of the inner cavity of the inner mold base 7, realizing stamping. The cutting component simultaneously cuts the edge of the molded part, and the scrap material after cutting enters the blanking frame 22 through the blanking cavity 8. Then, the linkage ejection component drives the lifting block 10 to move, lifting the molded product for easy removal. During the rotation and ejection process, the blanking frame 22 does not rise. During this process, the blanking frame 2... 2. It remains stationary and can continue to collect the cutting waste. It continues to rotate and pushes the top surface of the blanking frame 22 to a height that is flush with the top surface of the inner mold base 7, so as to facilitate the removal of the cutting waste in the blanking frame 22. The automatic ejection of the molded product and the cutting waste is realized in sequence. Since the waste has the problem of unfixed position and irregular shape, the conventional product and waste are ejected at the same time by the flat push plate. However, the waste will fall into the inner cavity of the inner mold base 7, which requires cleaning again, increasing the cleaning time. Incomplete cleaning makes it more inconvenient to mold the next part.

[0033] Please see Figure 1 and Figure 4As shown, the linkage ejection assembly includes a drive shaft 23 disposed in the cavity of the forming outer seat 2 and driven by a servo motor. A driven shaft is disposed on one side of the drive shaft 23. Gears 24 are fixedly sleeved on the outer surfaces of both the drive shaft 23 and the driven shaft, and the two gears 24 mesh with each other. A swing arm rod 25 for lifting the lifting block 10 and the dropping frame 22 in sequence is fixedly connected to the ends of both the drive shaft 23 and the driven shaft. A limiting push rod 28 is installed on the bottom surface of the lifting block 10, which slides in the cavity of the forming outer seat 2 in the vertical direction. A sliding column 27 is fixed on the surface of the limiting push rod 28. A sliding groove 26 that slides with the sliding column 27 is provided on the surface of each swing arm rod 25.

[0034] An arc-shaped guide groove 31 is provided on the end surface of the swing arm 25. The end of the arc-shaped guide groove 31 is connected to a sliding groove 32. The center of the arc-shaped guide groove 31 coincides with the axis of the drive shaft 23 and the driven shaft connected to the swing arm 25. A limiting push rod 34 with a limiting slide is fixedly attached to the bottom surface of the blanking frame 22. A sliding column 33 is fixedly attached to the surface of the limiting push rod 34. The sliding column 33 slides in the arc-shaped guide groove 31 and the sliding groove 32 respectively. During operation, the outer forming seat 2 and the inner mold seat 7 are installed together. The linkage ejection assembly starts to move. Under the meshing transmission of the two gears 24, the drive shaft 23 and the driven shaft move together. The sliding column 27 on the limiting push rod 28 slides in the sliding groove 26, so that the limiting push rod 28 slides in the outer forming seat. The upper limit slides vertically upward in the cavity of 2, which drives the formed product on the lifting block 10 to be lifted for easy removal. During this process, the sliding column 33 at the end of the swing arm 25 slides from the arc guide groove 31 to the end of the sliding groove 32. The dropping frame 22 does not move upward. During this process, the product has been ejected, while the dropping frame 22 is still in the dropping cavity 8. The dropping frame 22 continues to collect the cut waste until the sliding column 33 slides into the interior of the sliding groove 32, which drives the limit push rod 34 upward. Under the push of the limit push rod 34, the dropping frame 22 is lifted until the bottom surface of the inner cavity of the dropping frame 22 is flush with the top surface of the inner mold base 7. After multiple cuts and collections, the dropping frame 22 is ejected, and the cut waste in the dropping frame 22 is cleaned in one go.

[0035] Please see Figure 4 As shown, the bottom surface of the inner cavity of the outer molding seat 2 is provided with multiple bearing bases 30, and the bottom surface of the inner mold seat 7 is equipped with support rods 29 that cooperate with the multiple bearing bases 30. The inner mold seat 7 is placed inside the outer molding seat 2, and the support rods 29 are inserted into the bearing bases 30 to realize the snap-fit ​​installation of the inner mold seat 7 and the outer molding seat 2, which facilitates the replacement of the inner mold seat 7, adapts to the stamping of different molded parts, and obtains different products.

[0036] Please see Figures 1-3As shown, the cutting assembly includes a horizontal plate 13 slidably disposed in the inner cavity of the moving mold 5. The bottom surface of the moving mold 5 is provided with a through groove 14 communicating with its inner cavity, and the top surface of the inner cavity of the moving mold 5 is equipped with connecting columns 12 located on both sides of the horizontal plate 13. The top surface of the moving mold 5 is equipped with a propulsion cylinder 11. The ends of the two connecting columns 12 are connected to a fixing plate 20 disposed inside the through groove 14. The two ends of the bottom surface of the horizontal plate 13 are provided with a cutter 15 that moves through the inside of the through groove 14. The cutter 15 is used to cut the edge of the molded part and is located directly above the blanking cavity 8. First, the connecting columns 12 are connected to the fixing plate 20. Initially, the cutter 15 is located in the inner cavity of the moving mold 5 with a hidden design. When the molded part is being baked, the horizontal plate 13 is pushed to slide in the inner cavity of the moving mold 5 by the two propulsion cylinders 11. The horizontal plate 13 drives the cutter 15 to cut the pressed baked molded part, thereby cutting the edge of the molded part, improving utilization, and reducing the steps of cutting the edge of subsequent products.

[0037] Please see Figure 5 and Figure 6 As shown, both the moving mold 5 and the fixed plate 20 have collinearly connected mounting grooves 19 on their bottom surfaces. A support strip 35 is slidably engaged inside the mounting groove 19. The bottom surface of the support strip 35 is fixed to the top surface of the moving mold head 6. When installing the moving mold 5, the support strip 35 on the moving mold head 6 is slidably engaged into the mounting groove 19 on the bottom surface of the moving mold 5 to achieve the engagement and installation of the moving mold head 6 and the moving mold 5.

[0038] Please see Figure 6 As shown, one mounting groove 19 on the moving mold 5 is open, and the other mounting groove 19 on the moving mold 5 is closed and communicates with the through hole on the moving mold 5. A stud 18 is fixed to the end surface of the support bar 35. A wing nut sleeve 21 is rotatably installed on the surface of the moving mold 5 outside the through hole. The end of the stud 18 passes through the through hole and is threadedly connected to the wing nut sleeve 21. The support bar 35 slides into the mounting groove 19 with the opening until it moves into the mounting groove 19 on the closed side. The stud 18 passes through the through hole and fits against the end of the wing nut sleeve 21. Then, the wing nut sleeve 21 is rotated and moved, and the stud 18 is threaded into the interior of the wing nut sleeve 21, which fastens the moving mold head 6 to one end of the moving mold 5, ensuring the stability of the moving mold head 6 during stamping and ensuring the stamping quality. After the moving mold head 6 is removed, it is convenient to replace it with a size that matches the inner mold base 7, improving its applicability.

[0039] Please see Figure 1 and Figure 5As shown, a buffer seat 16 is installed on the bottom surface of the moving mold 5. A strip pressure plate 17 for pressing the edge of the molded part is elastically connected inside the buffer seat 16. A segmented stroke cylinder 3 is set above the moving mold 5. The segmented stroke cylinder 3 is installed on a stabilizing plate above the forming table 1. A limiting rod 4 that slides with the moving mold 5 is set on the bottom surface of the stabilizing plate. During stamping, the strip pressure plate 17 first contacts the molded part on the top surface of the inner mold seat 7. Under the continued push of the segmented stroke cylinder 3, the moving mold head 6 stamps the molded part. During this process, the strip pressure plate 17 enters the interior of the buffer seat 16 to achieve the buffer of the stamping. Then the segmented stroke cylinder 3 hovers for 5s-10s and stamps to the bottom, reducing the defect of product edge shrinkage and material shortage, and improving the molding quality.

[0040] Please see and Figure 5 As shown, the interior of the moving die head 6 is a hollow structure, and the water inlet and outlet on one side of the moving die head 6 are connected to the circulating cooling water tank through a circulation pipe. The moving die head 6 is cold-stamped through the water inlet and outlet, thereby improving the forming efficiency.

[0041] The present invention also provides a molding method for a hovering pre-compression molding die for automotive molded parts, the molding method specifically including the following steps:

[0042] Step 1: The baked molded part enters the top surface of the inner mold base 7 through the column block on the feed port 9. The segmented stroke cylinder 3 pushes the moving mold 5 and the moving mold head 6 to press down synchronously, and the strip pressure plate 17 initially fixes the top surface of the molded part.

[0043] Step 2: The moving mold 5 and the moving mold head 6 continue to press down. The moving mold head 6 presses down to the bottom surface of the inner cavity of the inner mold base 7 and hovers for 5-10 seconds. Then, the push cylinder 11 synchronously drives the horizontal plate 13 to drive the cutter 15 to cut the edge of the molded part. The waste material after cutting enters the blanking frame 22 through the blanking cavity 8.

[0044] Step 3: The linkage ejection component first drives the limiting push rod 28 to slide within the cavity of the molding outer seat 2 and lifts the molded product out through the lifting block 10. After continuing to rotate, the sliding column 33 at the end of the swing arm rod 25 slides from the arc guide groove 31 into the sliding groove 32. The sliding of the sliding groove 32 and the sliding column 33 lifts the limiting push rod 34. The limiting push rod 34 then pushes the top surface of the dropping frame 22 to a height that is flush with the top surface of the inner mold seat 7.

[0045] Working Principle: In use, the molded part is fed into the outer forming seat 2 through the feed inlet 9 and positioned on the top surface of the inner mold seat 7. The feeding of the molded part is assisted by a column block. Then, the moving mold 5 drives the moving mold head 6 downwards synchronously, approaching the inner cavity of the inner mold seat 7 until the moving mold head 6 is completely in contact with the bottom surface of the inner cavity of the inner mold seat 7. During the 5-10 second suspension of the moving mold head 6, the product achieves sufficient pressure holding, thus ensuring the product fully conforms to the moving mold head 6 and the inner mold seat 7, achieving stamping and forming with high quality. Figure 4 As shown, after molding, the horizontal plate 13 is synchronously driven by the propulsion cylinder 11 to drive the cutter 15 to cut the edge of the molded part. The waste material after cutting enters the dropping frame 22 through the dropping chamber 8 for collection, avoiding the need for additional subsequent steps. During unloading, due to the obstruction of the product, the waste material near the rear of the inner mold base 7 is difficult to remove first. Therefore, by linking the two swing arms 25 in the ejection assembly, the sliding column 27 on the limit push rod 28 slides in the sliding groove 26, driving the molded product on the lifting block 10 to be lifted for easy removal. During this process, the sliding column 33 at the end of the swing arm 25 slides from the arc guide groove 31 to the end of the sliding groove 32. Since the center of the arc guide groove 31 is close to the swing arm 25, the two swing arms 25 slide together. Since the rotation axes of the two arms coincide, the blanking frame 22 does not move upward. As the swing arm 25 continues to rotate until the product is ejected, the product can be easily removed because the blanking frame 22 does not block the outer periphery of the product. After the product is removed, the swing arm 25 continues to rotate until the sliding column 33 slides into the sliding groove 32 from the arc guide groove 31. Only then will the blanking frame 22 be lifted. After being lifted into place, the waste material inside the blanking frame 22 (especially near the rear side of the inner mold base 7) can be easily removed because there is no product blocking it. In other words, this application only needs to drive the swing arm 25 to rotate to achieve the product ejection first and then the waste material removal, so as to prevent mutual interference between the product removal and waste material removal processes.

[0046] The snap-fit ​​installation of the inner mold base 7 and the outer forming base 2 facilitates the replacement of the inner mold base 7. The sliding snap-fit ​​installation of the moving mold head 6 and the moving mold 5, when the thread of the stud 18 enters the interior of the wing nut sleeve 21, tightens one end of the moving mold head 6 and the moving mold 5, ensuring the stability of the moving mold head 6 during stamping. After the moving mold head 6 is removed, it is convenient to replace it with a size that matches the inner mold base 7, adapting to the stamping and forming of different molded parts, and obtaining different products.

[0047] The cutter 15 is located in the inner cavity of the moving mold 5 and is hidden. When the molded part is being baked, the horizontal plate 13 is pushed to slide in the inner cavity of the moving mold 5 by two push cylinders 11. The horizontal plate 13 drives the cutter 15 to cut the pressed molded part, thereby cutting off the edge of the molded part. The cut-off edge waste falls into the material drop box 22 for centralized collection, improving utilization and reducing the steps of cutting the edge of subsequent products.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hovering pre-compression molding die for automotive molded parts, comprising a molding platform (1), wherein a molding outer seat (2) is mounted on the top surface of the molding platform (1), characterized in that: An inner mold base (7) is snap-fitted into the inner mold base (2). A moving mold (5) is provided above the inner mold base (7). A moving mold head (6) is installed on the bottom surface of the moving mold (5) to cooperate with the inner mold base (7) and to form the molded part. A cutting component for cutting the edge of the molded part is installed inside the moving mold (5). Two lifting blocks (10) for ejecting the molded product are installed on the bottom surface of the inner cavity of the inner mold base (7). A waste material inlet is provided between the outer wall of the inner mold base (7) and the inner wall of the outer mold base (2). The material discharge cavity (8) is equipped with a material discharge frame (22) which is slidably installed inside the material discharge cavity (8). The inner wall of the material discharge frame (22) is set as a slope. The cavity inside the molding outer seat (2) is equipped with a linkage ejection component that first ejects the molded product and then lifts the material discharge frame (22). A feed port (9) is provided on one side surface of the molding outer seat (2). The top surface height of the feed port (9) is lower than the top surface height of the inner mold seat (7). A column block for assisting feeding and with the same height as the top surface of the inner mold seat (7) is provided on the surface of the feed port (9). The linkage ejection assembly includes a drive shaft (23) set in the cavity of the molding outer seat (2) and driven by a servo motor. A driven shaft is provided on one side of the drive shaft (23). Gears (24) are fixedly sleeved on the outer surfaces of the drive shaft (23) and the driven shaft. The two gears (24) mesh with each other. A swing arm rod (25) for lifting the lifting block (10) and the dropping frame (22) in sequence is fixedly connected to the ends of the drive shaft (23) and the driven shaft. A limiting push rod (28) is installed on the bottom surface of the lifting block (10) and limits its sliding in the vertical direction in the cavity of the molding outer seat (2). A sliding column (27) is fixed on the surface of the limiting push rod (28). A sliding groove (26) is provided on the surface of each swing arm rod (25) and slides with the sliding column (27). The end surface of the swing arm (25) is provided with an arc-shaped guide groove (31), and the end of the arc-shaped guide groove (31) is connected to a sliding groove (32). The bottom surface of the material drop frame (22) is fixedly connected with a limiting push rod (34) with a limit sliding. The surface of the limiting push rod (34) is fixedly connected with a sliding column (33). The sliding column (33) slides in the arc-shaped guide groove (31) and the sliding groove (32) respectively. The cutting assembly includes a horizontal plate (13) slidably disposed in the inner cavity of the moving mold (5). The bottom surface of the moving mold (5) is provided with a through groove (14) communicating with its inner cavity. The top surface of the inner cavity of the moving mold (5) is equipped with connecting columns (12) located on both sides of the horizontal plate (13). The top surface of the moving mold (5) is equipped with a propulsion cylinder (11). The ends of the two connecting columns (12) are connected to a fixing plate (20) disposed inside the through groove (14). The two ends of the bottom surface of the horizontal plate (13) are provided with a cutter (15) that moves through the inside of the through groove (14). The cutter (15) is used to cut the edge of the molded part. The bottom surface of the moving mold (5) is equipped with a buffer seat (16), and the buffer seat (16) is elastically connected to a strip pressure plate (17) for pressing the edge of the molded part. A segmented stroke cylinder (3) is provided above the moving mold (5). The segmented stroke cylinder (3) is installed on a stabilizing plate above the forming table (1). The bottom surface of the stabilizing plate is provided with a limiting rod (4) that slides with the moving mold (5).

2. The hovering pre-compression molding die for automotive molded parts according to claim 1, characterized in that, The inner cavity bottom surface of the outer mold base (2) is provided with multiple bearing bases (30), and the bottom surface of the inner mold base (7) is equipped with a support rod (29) that cooperates with the multiple bearing bases (30).

3. A hovering pre-compression forming mold for automotive molded parts according to claim 1, characterized in that, The bottom surfaces of the moving mold (5) and the fixed plate (20) are provided with collinear and interconnected mounting grooves (19). A support strip (35) is slidably engaged inside the mounting groove (19), and the bottom surface of the support strip (35) is fixed to the top surface of the moving mold head (6).

4. A hovering pre-compression molding die for automotive molded parts according to claim 3, characterized in that, One mounting groove (19) on the moving mold (5) is open, and the other mounting groove (19) on the moving mold (5) is closed and communicates with the through hole on the moving mold (5). A stud (18) is fixed on the end surface of the support bar (35). A wing nut sleeve (21) is rotatably installed on the surface of the moving mold (5) and outside the through hole. The end of the stud (18) passes through the through hole and is threadedly connected to the wing nut sleeve (21).

5. A hovering pre-compression forming mold for automotive molded parts according to claim 1, characterized in that, The interior of the moving mold head (6) is hollow, and the water inlet and outlet on one side of the moving mold head (6) are connected to the circulating cooling water tank through a circulating pipe.

6. A molding method for a hovering pre-compression molding die for automotive molded parts according to any one of claims 1-5, characterized in that, The molding method specifically includes the following steps: Step 1: The baked molded part enters the top surface of the inner mold base (7) through the column block on the feed port (9). The segmented stroke cylinder (3) pushes the moving mold (5) and the moving mold head (6) to press down synchronously, and the strip pressure plate (17) initially fixes the top surface of the molded part. Step 2: The moving mold (5) and the moving mold head (6) continue to press down. The moving mold head (6) presses down to the bottom surface of the inner cavity of the inner mold base (7) and hovers for 5-10 seconds. Then, the push cylinder (11) synchronously drives the horizontal plate (13) to drive the cutter (15) to cut the edge of the molded part. The waste material after cutting enters the blanking frame (22) through the blanking cavity (8). Step 3: The linkage push assembly first drives the limiting push rod 1 (28) to slide in the cavity of the molding outer seat (2) and lifts the molded product out through the lifting block (10). After continuing to rotate, the sliding column 2 (33) at the end of the swing arm rod (25) slides from the arc guide groove (31) to the sliding groove 2 (32). The sliding of the sliding groove 2 (32) and the sliding column 2 (33) lifts the limiting push rod 2 (34). The limiting push rod 2 (34) then pushes the top surface of the dropping frame (22) to the height of the top surface of the inner mold seat (7).

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