Automobile door stamping equipment for automobile

Abstract

The utility model discloses an automobile door stamping device which comprises a machine frame, and a stamping table is arranged at the front end of the machine frame. A lower die is installed on the stamping table, and an upper die matched with the lower die is arranged above the lower die. A pressurizing cylinder is arranged at the upper end of the rack, and a piston rod of the pressurizing cylinder penetrates through the rack downwards and is connected with the upper die through a stamping plate. A waste blanking port and a plurality of waste guide grooves are formed in the lower die, and a rectangular cutter and a plurality of groups of edge cutting cutters are arranged in the upper die. The upper end of the lower die is provided with the waste material blanking port, the two side edges of the lower die cavity are respectively provided with the multiple inclined waste material guide grooves, and the rectangular cutter and the multiple sets of edge cutting cutters in the upper die cavity are matched, so that waste materials are discharged in real time in the stamping process, the situation that the waste materials in the die need to be manually cleaned after each time of stamping is avoided, and the production efficiency is improved. The machining continuity and the working efficiency are greatly improved, and a new technical solution is provided for efficient and high-precision machining of the automobile door.

Description

Technical Field

[0001] The utility model relates to the technical field of door processing, and particularly relates to a door stamping device for an automobile. Background Technique

[0002] As a key component of an automobile structure, the automobile door plays a crucial role in its manufacturing process. The quality of the door is mainly reflected in multiple aspects such as anti-collision performance, sealing performance, and opening and closing convenience, and at the same time, it also needs to meet a series of other usage function requirements. In the process of automobile manufacturing, stamping dies are an indispensable process means for the production of door panels. Such dies are installed on a press, and by applying pressure to the material, the separation or plastic deformation of the material is achieved, thereby greatly improving the efficiency and accuracy of door processing and ensuring the quality of the product.

[0003] However, the existing stamping dies for automobile door processing face a problem in actual application: during the stamping process, the waste materials generated by punching are often unable to be discharged from the die in a timely manner. This means that after each stamping, it is necessary to manually clean the waste materials in the die, which not only greatly reduces the continuity of stamping processing but also seriously affects the work efficiency. Therefore, it is particularly important to conduct technological innovation for this problem and develop an automobile door stamping device that can more effectively discharge waste materials and improve processing efficiency. Summary of the Invention

[0004] The purpose of the utility model is to provide a door stamping device for an automobile to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A door stamping device for an automobile includes a frame; a stamping table is arranged at the front end of the frame, and a lower die is installed on the stamping table; a stamping plate is arranged above the stamping table, and an upper die is fixedly installed at the lower end of the stamping plate, and the upper die is adapted to the lower die; a boosting cylinder is arranged at the upper end of the frame, and the boosting cylinder is fixedly connected to the frame through a cylinder mounting seat; the top end of the piston rod of the boosting cylinder penetrates downward through the frame and is fixedly connected to the upper end of the stamping plate; a lower die cavity for placing a door is opened at the upper end of the lower die, and a waste material dropping port is opened at the bottom of the lower die cavity; a plurality of waste material guiding grooves are respectively opened at both sides of the lower die cavity, and the waste material guiding grooves are inclined; an upper die cavity is arranged at the lower end of the upper die, and the upper die cavity is adapted to the lower die cavity; a rectangular cutting knife is arranged in the upper die cavity, and the rectangular cutting knife corresponds to the position of the waste material dropping port; a plurality of groups of edge cutting knives are arranged at the side of the upper die cavity, and the edge cutting knives respectively correspond to the positions of the waste material guiding grooves.

[0007] Preferably, a plurality of pressing blocks are arranged in the upper die cavity.

[0008] Preferably, a plurality of auxiliary cutting knives are provided on the side of the lower die cavity, and the auxiliary cutting knives are adapted to the trimming cutting knives.

[0009] Preferably, a material guide plate is provided below the waste blanking port, and the material guide plate is inclined and penetrates through the side of the lower die.

[0010] Preferably, guide shafts are provided at the four corners of the upper die, and guide sleeves adapted to the guide shafts are provided at the four corners of the upper die.

[0011] Preferably, a movable plate is provided at the top end of the piston rod of the boosting cylinder, a shock pad is provided at the lower end of the movable plate, and the shock pad is fixedly connected to the upper end of the stamping plate.

[0012] Preferably, guide columns are respectively provided at the four corners of the upper end of the movable plate, and the upper ends of the guide columns penetrate upward through the cylinder mounting seat and are movably connected thereto; a spring is sleeved on the outer wall of the guide column, the lower end of the spring is fixedly connected to the movable plate, and the upper end of the spring abuts against the machine frame.

[0013] Preferably, two waste recycling bins are provided below the machine frame, and the two waste recycling bins respectively correspond to the positions of the discharge ports of the material guide plate and the waste material guide groove.

[0014] Preferably, a car door loading and unloading slide is provided at the front end of the machine frame, and the height of the car door loading and unloading slide is equivalent to the height of the lower die.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: By opening a waste blanking port at the upper end of the lower die and respectively opening a plurality of inclined waste guide grooves on both sides of the lower die cavity, and cooperating with the rectangular cutting knife and multiple groups of edge trimming cutting knives in the upper die cavity, the instant discharge of waste during the stamping process is realized, avoiding the need for manual cleaning of the waste in the die after each stamping, greatly improving the processing continuity and work efficiency; An inclined guide plate is arranged below the waste blanking port, and the guide plate penetrates through the side of the lower die, facilitating the smooth sliding of the waste; At the same time, two waste recycling bins are arranged below the frame, corresponding to the discharge ports of the guide plate and the waste guide grooves respectively, realizing the automatic classification collection and effective treatment of waste; A plurality of pressing blocks are arranged in the upper die cavity to ensure that the door material can closely fit the die during the stamping process, improving the processing accuracy; At the same time, the auxiliary cutting knife arranged on the side of the lower die cavity is adapted to the edge trimming cutting knife of the upper die, further ensuring the accuracy and consistency of edge trimming; The top end of the piston rod of the supercharging cylinder is provided with a movable plate, and a shock pad is arranged at the lower end of the movable plate, effectively reducing the impact and vibration on the equipment during the stamping process and prolonging the service life of the equipment; At the same time, guide columns and springs are respectively arranged at the four corner positions of the upper end of the movable plate, further enhancing the stability and seismic resistance of the equipment; A door loading and unloading sliding table is arranged at the front end of the frame, and its height is equivalent to that of the lower die, facilitating the rapid loading and unloading of the door and the maintenance of the die; At the same time, the overall structure is reasonably designed, facilitating the observation and adjustment by the operator, improving the safety and convenience of production, and providing a new technical solution for the high-efficiency and high-precision processing of automobile doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of the connection between the supercharging cylinder and the upper die of the utility model;

[0018] Figure 3 is a structural schematic diagram of the upper die of the utility model;

[0019] Figure 4 is a structural schematic diagram of the lower die of the utility model.

[0020] Wherein: 1. Frame; 2. Stamping table; 3. Lower die; 4. Stamping plate; 5. Upper die; 6. Supercharging cylinder; 7. Cylinder mounting seat; 8. Lower die cavity; 9. Waste blanking port; 10. Waste guide groove; 11. Upper die cavity; 12. Rectangular cutting knife; 13. Edge trimming cutting knife; 14. Pressing block; 15. Auxiliary cutting knife; 16. Guide plate; 17. Guide shaft; 18. Guide sleeve; 19. Movable plate; 20. Shock pad; 21. Guide column; 22. Spring; 23. Waste recycling bin; 24. Door loading and unloading sliding table. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0022] Please refer to Figures 1 to 4 , to achieve the above object, the present utility model provides the following technical solutions:

[0023] A door stamping device for an automobile, including a frame 1, wherein a stamping table 2 is provided at the front end of the frame 1; a lower die 3 is installed on the stamping table 2, and a stamping plate 4 is provided above the stamping table 2; an upper die 5 is fixedly installed at the lower end of the stamping plate 4, and the upper die 5 is adapted to the lower die 3; a boosting cylinder 6 is provided at the upper end of the frame 1, and the boosting cylinder 6 is fixedly connected to the frame 1 through a cylinder mounting seat 7; the top end of the piston rod of the boosting cylinder 6 penetrates downward through the frame 1 and is fixedly connected to the upper end of the stamping plate 4; a lower die cavity 8 for placing the door is opened at the upper end of the lower die 3, and a waste material dropping port 9 is opened at the bottom of the lower die cavity 8; a plurality of waste material guiding grooves 10 are respectively opened on both sides of the lower die cavity 8, and the waste material guiding grooves 10 are inclined; an upper die cavity 11 is provided at the lower end of the upper die 5, and the upper die cavity 11 is adapted to the lower die cavity 8; a rectangular cutting knife 12 is arranged in the upper die cavity 11, and the rectangular cutting knife 12 corresponds to the position of the waste material dropping port 9; a plurality of groups of edge cutting knives 13 are arranged on the side of the upper die cavity 11, and the edge cutting knives 13 respectively correspond to the positions of the waste material guiding grooves 10.

[0024] Preparation stage:

[0025] Ensure that the stamping device is in good working condition, check whether all components are firmly installed, especially whether the upper die 5 and the lower die 3 are aligned, and whether the edge cutting knives 13 and the rectangular cutting knife 12 are sharp; place the door to be processed in the lower die cavity 8 of the stamping table 2, ensure that the position of the door is correct and it fits completely with the lower die cavity 8;

[0026] Stamping stage:

[0027] Start the boosting cylinder 6, make its piston rod move downward, and push the stamping plate 4 and the upper die 5 at its lower end to move downward synchronously through the piston rod; thus, the upper die cavity 11 is aligned with the lower die cavity 8 and the die is closed to stamp the door. During the stamping process, the rectangular cutting knife 12 and the edge cutting knives 13 cut and trim the door simultaneously;

[0028] Waste material discharging stage:

[0029] After stamping, the piston rod of the boosting cylinder 6 moves upward, driving the upper die 5 away from the lower die 3 to complete a stamping cycle; the waste material generated during the stamping process is cut by the rectangular cutting knife 12 and falls into the waste material dropping port 9 at the bottom of the lower die cavity 8, and slides out through the inclined guide plate 16 below the waste material dropping port 9; at the same time, the waste material cut by the edge cutting knives 13 and dropped directly falls into the inclined waste material guiding grooves 10 and slides out, realizing the immediate discharge of the waste material;

[0030] Repeated processing:

[0031] Repeat the above steps to perform stamping on the next car door. During continuous production, waste materials will continuously be discharged through the waste material dropping port 9 and the waste material guiding groove 10 and fall into the waste material recycling bin 23 below for subsequent processing.

[0032] In summary, this car door stamping equipment drives the upper die 5 and the lower die 3 to close and stamp through a booster cylinder. At the same time, the trimming cutter 13 and the rectangular cutter 12 are used to cut and trim the car door, and the waste materials are immediately discharged through the waste material dropping port 9 and the waste material guiding groove 10, thereby efficiently and accurately completing the stamping of the car door.

[0033] Please refer to Figure 3 , as an embodiment of the present utility model, a plurality of pressing blocks 14 are provided in the upper die cavity 11.

[0034] In the above-mentioned solution, the design of the pressing blocks 14 can adapt to car door materials of different thicknesses and materials. By adjusting the positions and quantities of the pressing blocks 14, the stamping process can be optimized to meet different production requirements; when the upper die 5 starts to move downward and approaches the lower die 3, the pressing blocks 14 first come into contact with the car door material; the design of the pressing blocks 14 ensures that they can closely fit the surface of the car door material, thereby firmly positioning the car door material in the lower die cavity 8 during the stamping process; as the upper die 5 continues to move downward, the pressing blocks 14 apply uniform pressure to the car door material, and this pressure helps to eliminate any minor movement or deformation of the car door material during the stamping process, ensuring the accuracy and consistency of stamping; the presence of the pressing blocks 14 makes the car door material more stable during the stamping process, helping to improve the quality and precision of stamping; moreover, the pressing blocks 14 also help to protect the mold from damage, and can reduce wrinkles, cracks or other defects generated during the stamping process, thereby improving the appearance and performance of the final product.

[0035] Please refer to Figure 4 , as an embodiment of the present utility model, a plurality of auxiliary cutters 15 are provided on the side of the lower die cavity 8, and the auxiliary cutters 15 are adapted to the trimming cutters 13.

[0036] In the above-described solution, the auxiliary cutting knife 15 is adapted to the trimming cutting knife 13 of the upper die cavity 11 to jointly complete the trimming work of the car door and ensure the quality and accuracy of trimming; when the upper die 5 moves downward to close the mold with the lower die 3, the trimming cutting knife 13 starts to cut the edge of the car door; the auxiliary cutting knife 15 is located on the side of the lower die cavity 8, and the position of the auxiliary cutting knife 15 corresponds to that of the trimming cutting knife 13 to ensure that necessary support and cooperation can be provided during the trimming process; the design of the auxiliary cutting knife 15 ensures that they can cooperate closely with the trimming cutting knife 13, so as to maintain the accuracy and consistency of cutting during the trimming process. The auxiliary cutting knife 15 helps to eliminate any minor deviations or deformations during the trimming process and ensure the quality and accuracy of trimming; the auxiliary cutting knife 15 can reduce the resistance between the trimming cutting knife 13 and the car door material during the trimming process. By providing an additional cutting surface, the auxiliary cutting knife 15 helps the trimming cutting knife 13 to cut the car door material more smoothly and reduce the friction and resistance during the cutting process; the auxiliary cutting knife 15 also helps to protect the mold and the trimming cutting knife from damage to adapt to different trimming requirements and car door materials.

[0037] Please refer to Figure 4 , as an embodiment of the present utility model, a material guide plate 16 is provided below the waste material dropping port 9, and the material guide plate 16 is inclined and penetrates through the side of the lower die 3.

[0038] In the above-described solution, the design of the material guide plate 16 can adapt to waste materials of different shapes and sizes. Regardless of the size or shape of the waste material, the material guide plate 16 can effectively guide and discharge it from the mold to ensure the smooth progress of the stamping process; when the waste material generated during the stamping process is cut by the rectangular cutting knife 12 and falls into the waste material dropping port 9, at this time, the material guide plate 16 provided below the waste material dropping port 9 plays a guiding and orienting role, and the waste material slides down along the inclined material guide plate 16 under the action of gravity to ensure that the waste material can be smoothly discharged from the mold and avoid accumulation in the mold; by timely discharging the waste material from the mold through the material guide plate 16, the residue of the waste material in the mold is reduced, and the frequency and workload of cleaning the mold are lowered; the presence of the material guide plate 16 improves the production efficiency. The material guide plate 16 ensures the continuous discharge of the waste material, avoids stamping interruption or delay caused by waste material accumulation, thus maintaining the continuity and high efficiency of production, and further providing a strong guarantee for the smooth progress of the stamping process and the production of high-quality car doors.

[0039] Please refer to in combination Figure 2 、 Figure 3 , as an embodiment of the present utility model, guide shafts 17 are provided at the four corners of the lower end of the upper die 5, and guide sleeves 18 adapted to the guide shafts 17 are provided at the four corners of the upper end of the lower die 3.

[0040] In the above-described solution, when the upper die 5 starts to move downward and approaches the lower die 3, the guide shaft 17 first enters the guide sleeve 18. The cooperation between the guide shaft 17 and the guide sleeve 18 plays a role in guiding and positioning, ensuring that the upper die 5 and the lower die 3 can be accurately aligned during the die closing process; the cooperation between the guide shaft 17 and the guide sleeve 18 also helps to maintain the stability of the die. During the stamping process, the sliding of the guide shaft 17 and the guide sleeve 18 can bear and disperse the lateral force generated by stamping, preventing the die from shifting or tilting; since the guide shaft 17 and the guide sleeve 18 undertake the tasks of guiding and positioning, the friction and wear of other parts of the die during the die closing and stamping processes will be reduced, thereby extending the service life of the die; the precise cooperation between the guide shaft 17 and the guide sleeve 18 helps to improve the stamping accuracy, ensuring the accurate alignment of the upper die 5 and the lower die 3 during the die closing process, thereby reducing the dimensional deviation and shape error of the stamped parts.

[0041] Please refer to Figure 2 , as an embodiment of the present utility model, a movable plate 19 is provided at the top end of the piston rod of the boosting cylinder 6. A shock pad 20 is provided at the lower end of the movable plate 19, and the shock pad 20 is fixedly connected to the upper end of the stamping plate 4; guide posts 21 are respectively provided at the four corners of the upper end of the movable plate 19. The upper ends of the guide posts 21 penetrate upward through both sides of the cylinder mounting seat 7 and are movably connected thereto; a spring 22 is sleeved on the outer wall of the guide post 21. The lower end of the spring 22 is fixedly connected to the movable plate 19, and the upper end of the spring 22 abuts against the inner wall of the upper end of the frame 1.

[0042] In the above-described solution, the movable plate 19 is fixed to the top end of the piston rod and serves as an intermediate component for connecting and transmitting force; the shock pad 20 is installed at the lower end of the movable plate 19 and is used to buffer and absorb impact energy to protect the stamping plate 4 and other components from damage; the guide posts 21 are arranged at the four corner positions on the movable plate 19 and are used to guide the vertical movement of the movable plate 19 to ensure the stability and accuracy of the movement; the spring 22 is sleeved on the outer wall of the guide post 21, where the upper end of the spring 22 abuts against the top end of the inner wall of the frame 1, and the lower end of the spring 22 is fixedly connected to the movable plate 19 and is used to provide a reset force and a buffering effect; when the boosting cylinder 6 starts to work, the piston rod pushes the movable plate 19 downward, and the movable plate 19 drives the shock pad 20 and the stamping plate 4 to move downward together; during the stamping process, the stamping plate 4 drives the upper die 5 to apply pressure to the car door to complete the required stamping or forming operation; the shock pad 20 plays a buffering role between the movable plate 19 and the stamping plate 4, absorbs the impact energy, and reduces the damage to the equipment and the car door caused by the impact; when the stamping plate 4 drives the upper die 5 to contact the car door, the shock pad 20 will be compressed and deformed, thereby slowing down the impact speed and reducing the impact force; the guide posts 21 play a guiding role at the upper end of the movable plate 19 to ensure the movement stability and accuracy of the movable plate 19 in the vertical direction; after the stamping is completed, the piston rod of the boosting cylinder 6 starts to retract, driving the movable plate 19 to move upward. At this time, the spring 22 starts to play a role and provides a reset force to help the movable plate 19 quickly return to the initial position.

[0043] Please refer to Figure 1 , as an embodiment of the present invention, two waste recycling bins 23 are provided below the frame 1, and the two waste recycling bins 23 are respectively corresponding to the discharge port positions of the material guide plate 16 and the waste material guide groove 10.

[0044] In the above-described solution, during the stamping process, the generated waste will fall into the material guide plate 16 through the waste material dropping port 9 and slide along the material guide plate 16 to one of the waste recycling bins 23; at the same time, the waste in the waste material guide groove 10 will also slide down to the other waste recycling bin 23 under its inclined guidance; the two waste recycling bins 23 respectively collect the waste from the material guide plate 16 and the waste material guide groove 10, realizing the classified collection of waste, which is convenient for the storage and subsequent treatment of waste, such as recycling, reuse or disposal; the presence of the waste recycling bins 23 helps to keep the working environment of the stamping equipment clean. By collecting the waste in a timely manner, the accumulation of waste around the equipment is reduced, and the frequency and difficulty of cleaning work are lowered; when the waste recycling bin 23 is full, the operator can quickly replace or empty it to ensure the continuity and high efficiency of the stamping process.

[0045] Please refer to Figure 1 , as an embodiment of the present invention, a car door loading and unloading slide 24 is provided at the front end of the frame 1, and the height of the car door loading and unloading slide 24 is equivalent to the height of the lower die 3.

[0046] In the above-described solution, the door loading and unloading slide table 24 first serves as a loading platform for placing the door components to be stamped. The height of the door loading and unloading slide table 24 is designed to be equivalent to that of the lower die 3, ensuring that the door components can be placed smoothly and accurately in the designated position, facilitating subsequent stamping operations. After the stamping process is completed, the stamped door components will fall off or be unloaded from the lower die 3. At this time, the door loading and unloading slide table 24 serves as an unloading platform to receive the door components unloaded from the lower die 3. The door loading and unloading slide table 24 can also temporarily store the door components, waiting for processing or transfer in subsequent processes. Operators can perform simple sorting or preliminary inspection on the door components on the door loading and unloading slide table 24 to ensure product quality. By reasonably designing the height and position of the slide table, rapid loading and unloading of the door components are achieved, which helps to reduce the standby time of the stamping machine and improve the overall operating efficiency of the production line.

[0047] Although the specific implementation manners of the present utility model have been described above, those skilled in the art should understand that these are merely illustrative examples. The protection scope of the present utility model is defined by the appended claims. Without departing from the principles and essence of the present utility model, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A door stamping device for a car, comprising a frame (1); characterized in that: A punching platform (2) is provided at the front end of the frame (1), wherein a lower die (3) is installed on the punching platform (2); a punching plate (4) is provided above the punching platform (2), wherein an upper die (5) is fixedly installed at the lower end of the punching plate (4), wherein the upper die (5) is adapted to the lower die (3); a booster cylinder (6) is provided at the upper end of the frame (1), wherein the booster cylinder (6) is fixedly connected to the frame (1) via a cylinder mounting seat (7); the top end of the piston rod of the booster cylinder (6) passes through the frame (1) downward and is fixedly connected to the upper end of the punching plate (4); a lower die cavity (8) is provided at the upper end of the lower die (3), wherein the lower die cavity (8) is provided at the upper end of the lower die (3), wherein the lower die cavity (8) is provided at the upper end of the lower die (3), wherein the upper die cavity (8) is provided at the lower ... A waste material discharge port (9) is provided at the bottom of the mold cavity (8); a plurality of waste material guide grooves (10) are respectively provided on both sides of the lower mold cavity (8), wherein the waste material guide grooves (10) are arranged obliquely; an upper mold cavity (11) is provided at the lower end of the upper mold (5), wherein the upper mold cavity (11) is adapted to the lower mold cavity (8); a rectangular cutter (12) is provided in the upper mold cavity (11), wherein the rectangular cutter (12) corresponds to the position of the waste material discharge port (9); and a plurality of groups of trimming cutters (13) are provided on the side of the upper mold cavity (11), wherein the trimming cutters (13) respectively correspond to the positions of the waste material guide grooves (10).

2. A door stamping device for a car according to claim 1, characterized in that: A plurality of pressing blocks (14) are arranged in the upper mold cavity (11).

3. A door stamping device for automobiles according to claim 1, characterized in that: A plurality of auxiliary cutters (15) are arranged on the side of the lower mold cavity (8), wherein the auxiliary cutters (15) are matched with the trimming cutters (13).

4. A door stamping device for automobiles according to claim 1, characterized in that: A material guide plate (16) is provided below the waste material drop opening (9), wherein the material guide plate (16) is arranged obliquely and passes through the side of the lower mold (3).

5. A door stamping device for automobiles according to claim 1, characterized in that: The upper die (5) is provided with guide shafts (17) at the four corners, and the lower die (3) is provided with guide sleeves (18) matched with the guide shafts (17) at the four corners.

6. A door stamping device for automobiles according to claim 1, characterized in that: A movable plate (19) is provided at the top end of the piston rod of the boosting cylinder (6), wherein a shock absorbing pad (20) is provided at the lower end of the movable plate (19), and the shock absorbing pad (20) is fixedly connected to the upper end of the stamping plate (4).

7. A door stamping device for automobiles according to claim 6, characterized in that: The upper end of the movable plate (19) is provided with guide columns (21) at four corners, wherein the upper ends of the guide columns (21) penetrate upward through the cylinder mounting seat (7) and are movably connected thereto; the outer wall of the guide column (21) is sleeved with a spring (22), wherein the lower end of the spring (22) is fixedly connected to the movable plate (19), and the upper end of the spring (22) is in contact with the frame (1).

8. A door stamping device for automobiles according to claim 1, characterized in that: Two waste recovery boxes (23) are provided below the frame (1), wherein the two waste recovery boxes (23) correspond to the positions of the discharge ports of the guide plate (16) and the waste guide trough (10), respectively.

9. A door stamping device for automobiles according to claim 8, characterized in that: The front end of the frame (1) is provided with a door loading and unloading slide (24), wherein the height of the door loading and unloading slide (24) is equivalent to the height of the lower mold (3).

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