A T-shaped structural member correcting device

Abstract

The application discloses a T-shaped structural part correcting device, and relates to the technical field of manufacturing auxiliary equipment, which comprises an upper pressing die, an upper pressing mould, a lower pressing mould, a mounting plate and a base, the upper pressing mould is fixed below the upper pressing die, the upper pressing die is installed on a pressing machine during use, the mounting plate is fixed above the base, the lower pressing mould is arranged above the mounting plate, the lower pressing mould is in the shape of a vertical plate, a placing opening for placing T-shaped or L-shaped workpieces is arranged on the lower pressing mould, the placing opening is located directly below corresponding upper pressing moulds, and the opening angle of the placing opening is 85-88 degrees. The upper pressing die and the upper pressing mould are driven by the pressing machine to be extruded downwards, the bottom of the upper pressing mould is directly opposite a welding position of the workpiece, the workpiece can be extruded to be perpendicular during extrusion, the workpiece cannot slide sideways due to the limitation of the placing opening, processing is more convenient, in addition, the lower pressing moulds are arranged uniformly, can provide stable supporting force, guarantee that the workpiece is uniformly stressed during placement, and improve the correcting effect.

Description

Technical Field

[0001] This application relates to the field of manufacturing auxiliary equipment technology, and in particular to a T-shaped structural component correction device. Background Technology

[0002] In mechanical design and manufacturing, there are often T-shaped structural components made by welding two plates. During welding, the stress causes the T-shaped structural components to be non-perpendicular. Moreover, due to different welding processes, the deviation angle may be large or small. After welding, structural correction is required before the components can be used or shipped. There are various correction methods.

[0003] Conventional shaping methods include hammering and flame shaping. However, for some high-requirement stainless steel products, hammering and flame shaping of the weld surface are generally prohibited. Such shaping methods will have an adverse effect on the welding quality, reduce the strength and service life of the structure. For such parts, only low-stress treatment methods, such as extrusion shaping, can be used. However, existing extrusion shaping devices are inconvenient to fix the workpiece and have low shaping efficiency. Summary of the Invention

[0004] To improve the correction efficiency of T-shaped structural components, this application provides a T-shaped structural component correction device.

[0005] The T-shaped structural component correction device provided in this application adopts the following technical solution:

[0006] A T-shaped structural component correction device includes an upper pressure die, an upper pressure mold, a lower die, a mounting plate, and a base. The upper pressure mold is fixed below the upper pressure die, which is installed on a press during use. The mounting plate is fixed above the base, and the lower die is positioned above the mounting plate. The lower die is vertical and has a placement opening for placing T-shaped or L-shaped workpieces. The placement opening is located directly below the corresponding upper pressure die, and the opening angle is 85°-88°. There are three lower dies, which are evenly distributed on the mounting plate.

[0007] By adopting the above technical solution, a T-shaped or L-shaped workpiece is placed at the placement opening, with the side of the workpiece that is aligned at an angle greater than 90° facing upwards. Then, the upper pressure die and upper pressure mold are driven by a press to press downwards. The bottom of the upper pressure mold is directly opposite the welding point of the workpiece. During the downward pressing process, the workpiece can be pressed into a vertical state without slipping, making processing more convenient. The lower mold is evenly distributed and can provide stable support force, ensuring that the workpiece is subjected to uniform force when placed, thus improving the correction effect.

[0008] Preferably, the upper die has a T-shaped cross-section, a rounded bottom, and a number of symmetrically distributed reinforcing ribs for improving strength are fixed on both sides of the upper die. The reinforcing ribs on the same side are evenly spaced, and mounting holes for fixing the upper die are provided on both sides of the upper end.

[0009] By adopting the above technical solution, when the upper die contacts the workpiece, the rounded corner can increase the contact area between the upper die and the workpiece, reduce the impact on the weld, and the inverted triangular structure concentrates the pressure at the lower end of the upper die, so that the correction part can bear appropriate pressure.

[0010] Preferably, the bottom of the upper presser is provided with a first concave groove, the upper end of the upper presser is fixed to the inner side of the first concave groove by bolts to prevent the upper presser from shifting, the upper surface of the base is provided with a second concave groove, and the bottom of the mounting plate is fixed to the inner side of the second concave groove by bolts to prevent the mounting plate from shifting.

[0011] By adopting the above technical solution, the upper die is limited by the first concave groove and the mounting plate is limited by the second concave groove. When the workpiece is corrected, the positions of the upper die and the lower die will not change, the structure is more stable, thereby improving the accuracy and effect of correction.

[0012] Preferably, the mounting plate has four centrally symmetrically distributed vertical rods on its upper surface. Two side plate slide rails are fixed on the vertical rods and distributed symmetrically along the length of the upper mold. Two sliding holes are opened at both ends of the lower mold, and the lower mold is slidably mounted on the side plate slide rails through the two sliding holes. Two pin holes are opened on the side plate slide rails, and the two pin holes are located on both sides of the middle lower mold. Fixing pins are inserted into the pin holes to prevent the lower mold in the middle position from moving to the sides. An ear plate is fixed at one end of the lower mold. A rotating hole is opened on the ear plate located in the middle position, and a bidirectional threaded rod is rotatably connected in the rotating hole. Threaded holes are opened on the two ear plates located at both ends, and they are threadedly connected to the bidirectional threaded rod through the threaded holes. A rotating handle is fixed at one end of the bidirectional threaded rod.

[0013] By adopting the above technical solution, the operator can rotate the handle to drive the bidirectional threaded rod to rotate. At this time, the lower mold in the middle position is limited by the fixing pins on both sides and will not move to the sides. The two lower molds on both sides will move symmetrically under the drive of the bidirectional threaded rod. This can adjust the distance between the two lower molds and ensure that the two lower molds are always in a symmetrical state. According to the width of the workpiece, the distance between the two lower molds on both sides can be adjusted to the distance where the workpiece is placed. This allows for the processing of workpieces of different widths and expands the applicability of the device.

[0014] Preferably, the height of the side plate slide rail is smaller than the height of the slide hole, a spring hole is provided on the upper inner wall of the slide hole, and a thrust spring is provided in the spring hole. A top cover is provided at the end of the thrust spring away from the spring hole, and the lower end of the top cover abuts against the upper surface of the side plate slide rail. A gap is provided between the bottom of the lower mold and the mounting plate.

[0015] By adopting the above technical solution, the lower mold not only slides on the side plate slide rail, but also can move slightly up and down along the side plate slide rail. Under the support of the thrust spring, the lower mold moves upward and its bottom separates from the mounting plate. During the movement, no friction is generated between the lower mold and the mounting plate. When the workpiece is being corrected, when the upper die presses down, the lower mold moves downward and compresses the thrust spring, so that the bottom of the lower mold abuts against the mounting plate. The mounting plate provides the support force for correcting the workpiece, which can prevent the side plate slide rail from deforming, improve the service life of the side plate slide rail, thereby extending the service life of the device and reducing the maintenance requirements of the device.

[0016] Preferably, the lower surface of the top cover is provided with a graphite coating to reduce the friction between the top cover and the upper surface of the side plate slide rail.

[0017] By adopting the above technical solution, the lower mold will be subject to friction between the top cover and the side plate slide rail when it moves. The graphite coating between the two can effectively reduce the friction between them, improve the smoothness of the lower mold's movement, and make it easier for operators to use.

[0018] Preferably, two fixed rods are fixed on the vertical rod, which are distributed symmetrically along the width direction of the upper mold. Two circular holes are opened on the fixed rods, and a slide rod is inserted into the circular holes. A push plate is fixed to one end of the inner side of the slide rod, and a shoulder is provided at one end of the outer side of the slide rod. A reset spring is sleeved on the slide rod, and the two ends of the reset spring are fixedly connected to the shoulder and the fixed rod, respectively.

[0019] By adopting the above technical solution, the two push plates on both sides tend to move towards the middle under the action of the reset spring. After the operator puts in the workpiece, the two push plates will move towards the middle, holding the two sides of the workpiece together to ensure that the workpiece is in the middle position and to prevent one end of the workpiece from not touching the lower mold, thereby further improving the correction effect of the device.

[0020] Preferably, a round rod is rotatably provided above the fixed rod, and a rotating hole is opened at the side end of the vertical rod. The two ends of the round rod are rotatably connected to the rotating holes at corresponding positions. Pull ropes are connected to both sides of the upper pressure tire. The other end of the pull rope passes under the round rod at the corresponding position and is connected to the side of the push plate near the slide rod.

[0021] By adopting the above technical solution, when the upper pressure tire moves upward, it will pull one end of the pull rope upward. At this time, the other end of the pull rope will pull the push plate outward and lengthen the reset spring, making it easier for the operator to place the workpiece. When the upper pressure tire moves downward, the upper end of the pull rope will relax. Under the action of the reset spring, the push plate will move towards the middle, pushing the workpiece to the middle position, which is convenient for workpiece correction and further facilitates the operator's use.

[0022] Preferably, the bottom of the lower mold has a widened edge to increase the contact area with the mounting plate and prevent the lower mold from tilting under force.

[0023] By adopting the above technical solution, when the lower mold moves downward and contacts the mounting plate, the widened edge can improve the stability of the lower mold and prevent the lower mold from tilting and deforming.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Place the workpiece at the placement opening, and then use the press to drive the upper pressure die and upper pressure mold downwards. The bottom of the upper pressure mold is directly opposite the welding position of the workpiece. During the downward pressing process, the workpiece can be squeezed into a vertical state. Moreover, the workpiece is limited by the placement opening and will not slip sideways, making processing more convenient. In addition, the lower mold is evenly distributed, which can provide stable support force, ensure that the workpiece is evenly stressed when placed, and improve the correction effect.

[0026] 2. With an opening angle of 85°-88°, the workpiece with a certain springback effect can be fully overcorrected, so that after the workpiece springs back, it can be in a vertical state, further improving the correction effect on different workpieces. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the overall structure of Embodiment 1 of this application;

[0028] Figure 2 This is a schematic diagram illustrating the upper mold structure, which is the main feature of Embodiment 1 of this application.

[0029] Figure 3 This is a schematic diagram illustrating the main structure of the tire mold in Embodiment 1 of this application;

[0030] Figure 4 This is a schematic diagram illustrating the overall structure of Embodiment 2 of this application;

[0031] Figure 5 This is a schematic diagram illustrating the connection structure on the mounting plate, which is the main feature of Embodiment 2 of this application.

[0032] Figure 6 This is a schematic diagram illustrating the main structure of the top cover in Embodiment 2 of this application;

[0033] Attached label: 1. Upper tire;

[0034] 2. Upper die; 21. Rounded corners; 22. Reinforcing ribs;

[0035] 3. Lower mold; 31. Placement opening; 32. Sliding hole; 33. Ear plate; 34. Thrust spring; 35. Top cover;

[0036] 4. Mounting plate; 41. Vertical rod; 42. Side plate slide rail; 43. Pin hole; 44. Fixing pin;

[0037] 5. Base;

[0038] 6. Double-ended threaded rod; 61. Rotary handle;

[0039] 7. Fixed rod; 71. Sliding rod; 72. Push plate; 73. Shoulder; 74. Return spring; 75. Round rod; 76. Pull rope. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0041] This application discloses a T-shaped structural component correction device.

[0042] Example 1

[0043] Reference Figure 1-3 The T-shaped structural component correction device includes an upper pressure mold 1, an upper mold 2, a lower mold 3, a mounting plate 4, and a base 5. The bottom of the upper pressure mold 1 has a first concave groove. The upper end of the upper mold 2 is fixed to the inner side of the first concave groove by bolts. The upper mold 2 has a T-shaped cross-section and a rounded corner 21 at its bottom. Several reinforcing ribs 22 for increasing strength are fixed on both sides of the upper mold 2, and the reinforcing ribs 22 on both sides are symmetrically distributed. The reinforcing ribs 22 on the same side are evenly spaced. The upper surface of the seat 5 is provided with a second concave groove, and the bottom of the mounting plate 4 is fixed to the inner side of the second concave groove by bolts. The lower mold 3 is set above the mounting plate 4. The lower mold 3 is in the shape of a vertical plate, and the lower mold 3 is provided with a placement opening 31 for placing T-shaped or L-shaped workpieces. The placement opening 31 is located directly below the upper mold 2 at the corresponding position, and the opening angle of the placement opening 31 is 85°-88°. There are three lower molds 3, and the lower molds 3 are evenly distributed on the mounting plate 4.

[0044] The upper die 2 is limited by the first concave groove, and the mounting plate 4 is limited by the second concave groove. When the workpiece is being corrected, the positions of the upper die 2 and the lower die 3 will not change, making the structure more stable and thus improving the accuracy and effect of the correction. When the upper die 2 contacts the workpiece, the rounded corner 21 can increase the contact area between the upper die 2 and the workpiece, reducing the impact on the weld. Moreover, the inverted triangular structure concentrates the pressure at the lower end of the upper die 2, so that the correction part bears appropriate pressure.

[0045] The implementation principle of the T-shaped structural component correction device in this application embodiment is as follows: When in use, the upper pressure die 1 is installed on the press. The T-shaped workpiece or L-shaped workpiece is placed at the placement opening 31, so that the side of the workpiece with a correction angle greater than 90° faces upward. Then, the press drives the upper pressure die 1 and the upper pressure die 2 to press downward. The bottom of the upper pressure die 2 is directly opposite the welding point of the workpiece. During the pressing process, the workpiece can be pressed into a vertical state, and the workpiece will not slip sideways, making processing more convenient. The lower die 3 is evenly distributed and can provide stable support force, ensuring that the workpiece is subjected to uniform force when placed, thus improving the correction effect.

[0046] It should be noted that the lower mold 3 can adjust the opening size of the placement port 31 according to the workpiece size to meet the workpiece correction requirements.

[0047] Example 2

[0048] Reference Figure 4 and 5 The difference between this embodiment and embodiment one is that four vertical rods 41 are provided on the upper surface of the mounting plate 4. The four vertical rods 41 are located at the four corners and are symmetrically distributed. Two symmetrically distributed side plate slide rails 42 are fixed on the vertical rods 41. The side plate slide rails 42 are parallel to the length direction of the upper mold 2. Two sliding holes 32 are opened at both ends of the lower mold 3. The lower mold 3 is slidably mounted on the side plate slide rails 42 through the two sliding holes 32. Two pin holes 43 are opened on the side plate slide rails 42. The two pin holes 43 are located on both sides of the middle lower mold 3. A fixing pin 44 is inserted into the pin holes 43. An ear plate 33 is fixed at one end of the lower mold 3. A rotating hole is opened on the ear plate 33 located in the middle position. A bidirectional threaded rod 6 is rotatably connected in the rotating hole. The bidirectional threaded rod 6 cannot be translated along the rotating hole. Threaded holes are opened on the two ear plates 33 located on both sides. Threaded holes are threaded to the bidirectional threaded rod 6 through the threaded holes. A rotating handle 61 is fixed at one end of the bidirectional threaded rod 6.

[0049] By rotating the handle 61 to rotate the bidirectional threaded rod 6, the lower mold 3 in the middle position is limited by the fixing pins 44 on both sides and cannot move to the sides. However, the two lower molds 3 on both sides will move symmetrically towards or away from each other under the drive of the bidirectional threaded rod 6, adjusting the distance between the two lower molds 3. Moreover, the two lower molds 3 are always in a symmetrical state. According to the width of the workpiece, the position of the two lower molds 3 on both sides can be adjusted to just support the edge of the workpiece. This allows for the processing of workpieces of different widths, expanding the applicability of the device.

[0050] Two symmetrically distributed fixing rods 7 are fixed on the vertical rod 41, and the fixing rods 7 are parallel to the width direction of the upper mold 2. A round rod 75 is rotatably arranged above the fixing rod 7. Two symmetrically distributed round holes are opened on the fixing rod 7, and a sliding rod 71 is slidably inserted into the round hole. A push plate 72 is fixed to one end of the inner side of the two sliding rods 71, and a shoulder 73 is provided at one end of the outer side of the sliding rod 71. A return spring 74 is sleeved on the sliding rod 71, and the two ends of the return spring 74 are fixed to the shoulder 73 and the fixing rod 7, respectively. Pull ropes 76 are connected to both sides of the upper mold 1. The other end of the pull rope 76 passes under the round rod 75 at the corresponding position and is connected to the push plate 72.

[0051] Under the action of the reset spring 74, the two push plates 72 on both sides tend to move towards the middle. When the upper pressure tire 1 moves upward, it will pull one end of the pull rope 76 upward and taut the pull rope 76. At this time, the other end of the pull rope 76 will pull the push plate 72 outward and lengthen the reset spring 74. After the push plate 72 separates to both sides, it is convenient for the operator to place the workpiece. When the upper pressure tire 1 moves downward, the upper end of the pull rope 76 relaxes. Under the action of the reset spring 74, the push plate 72 moves towards the middle and pushes the workpiece to the middle position to prevent one end of the workpiece from not being placed on the lower mold 3, which facilitates the correction of the workpiece and makes it convenient for the operator to use.

[0052] refer to Figure 6 The height of the side plate slide rail 42 is smaller than the height of the slide hole 32. A spring hole is provided on the upper inner wall of the slide hole 32, and a thrust spring 34 is provided in the spring hole. A top cover 35 is provided at the end of the thrust spring 34 away from the spring hole. The lower end of the top cover 35 abuts against the upper surface of the side plate slide rail 42. The lower surface of the top cover 35 is provided with a graphite coating, which can reduce the friction between the top cover 35 and the upper surface of the side plate slide rail 42. The bottom of the lower mold 3 does not contact the mounting plate 4, so that the lower mold 3 has a certain space for descent. The bottom of the lower mold 3 is provided with a widened edge.

[0053] Since the height of the side plate slide rail 42 is smaller than the height of the slide hole 32, the lower mold 3 not only slides on the side plate slide rail 42, but can also move up and down along the side plate slide rail 42. Under the support of the thrust spring 34, the lower mold 3 moves upward and its bottom separates from the mounting plate 4. During the movement, no friction is generated between the lower mold 3 and the mounting plate 4. The graphite coating between the top cover 35 and the side plate slide rail 42 can effectively reduce the friction between the two and improve the smoothness of the movement of the lower mold 3. When the workpiece is corrected, when the upper pressure die 2 presses down, the lower mold 3 will move downward and compress the thrust spring 34, so that the bottom of the lower mold 3 abuts against the mounting plate 4. The mounting plate 4 provides the support force for correcting the workpiece, which can prevent the side plate slide rail 42 from deforming and improve the service life of the side plate slide rail 42, thereby extending the service life of the device and reducing the maintenance requirements of the device. Moreover, when the lower mold 3 moves downward and contacts the mounting plate 4, the widened edge can improve the stability of the lower mold 3 and prevent the lower mold 3 from tilting and deforming.

[0054] The implementation principle of Embodiment 2 is as follows: The operator can rotate the rotary handle 61, driving the bidirectional threaded rod 6 to rotate, which can adjust the distance between the two lower molds 3 and ensure that the two lower molds 3 are always in a symmetrical state. According to the width of the workpiece, the distance between the two lower molds 3 on both sides can be adjusted to the distance where the workpiece is placed, which can process workpieces of different widths, thus expanding the applicability of the device. Moreover, the lower molds 3 are not only slidably mounted on the side plate slide rail 42, but can also move up and down along the side plate slide rail 42. Under the support of the thrust spring 34, the bottom of the lower mold separates from the mounting plate 4. During movement, no friction is generated between the lower molds 3 and the mounting plate 4, making the movement smoother. During workpiece alignment, the lower mold 3 moves downward and compresses the thrust spring 34, causing the bottom of the lower mold 3 to abut against the mounting plate 4. The mounting plate 4 provides support for workpiece alignment, preventing deformation of the side slide rail 42. In addition, when the upper pressure mold 1 moves upward, it pulls one end of the pull rope 76 upward. At this time, the other end of the pull rope 76 pulls the push plate 72 outward and stretches the reset spring 74. The two push plates 72 separate to the sides, making it easier for the operator to place the workpiece. When the upper pressure mold 1 moves downward, the upper end of the pull rope 76 relaxes. Under the action of the reset spring 74, the push plate 72 moves towards the middle, pushing the workpiece to the middle position, which facilitates workpiece alignment and further facilitates operator use.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A T-shaped structural component correction device, characterized in that: The system includes an upper presser (1), an upper mold (2), a lower mold (3), a mounting plate (4), and a base (5). The upper mold (2) is fixed below the upper presser (1). The upper presser (1) is installed on the press during use. The mounting plate (4) is fixed above the base (5), and the lower mold (3) is set above the mounting plate (4). The lower mold (3) is vertical and has a placement opening (31) for placing T-shaped or L-shaped workpieces. The placement opening (31) is located directly below the upper mold (2) at the corresponding position, and the opening angle of the placement opening (31) is 85°-88°. There are three lower molds (3), and they are evenly spaced. The mounting plate (4) is provided with four centrally symmetrically distributed vertical rods (41) on its upper surface. Two side plate slide rails (42) are fixed on the vertical rods (41) and distributed along the length of the upper mold (2). The two side plate slide rails (42) are symmetrically distributed. Two sliding holes (32) are opened at both ends of the lower mold (3). The lower mold (3) is slidably mounted on the side plate slide rails (42) through the two sliding holes (32). Two pin holes (43) are opened on the side plate slide rails (42). The two pin holes (43) are located on both sides of the middle lower mold (3). A fixing pin (44) is inserted into the pin hole (43) to prevent the middle position from being fixed. The lower mold (3) moves to both sides. One end of the lower mold (3) is fixed with an ear plate (33). The ear plate (33) in the middle position has a rotating hole, and a bidirectional threaded rod (6) is rotatably connected in the rotating hole. The two ear plates (33) at both ends have threaded holes, and are threadedly connected to the bidirectional threaded rod (6) through the threaded holes. One end of the bidirectional threaded rod (6) is fixed with a rotating handle (61). Two fixed rods (7) are fixed on the vertical rod (41) and distributed along the width direction of the upper mold (2). The two fixed rods (7) are symmetrically distributed. Two round holes are opened on the fixed rods (7), and a sliding rod (71) is inserted in the round holes. A push plate (72) is fixed at one end of the side, and a shoulder (73) is provided at one end of the outer side of the slide rod (71). A reset spring (74) is sleeved on the slide rod (71), and the two ends of the reset spring (74) are fixedly connected to the shoulder (73) and the fixed rod (7) respectively. A round rod (75) is rotatably provided above the fixed rod (7). A rotating hole is opened at the side end of the vertical rod (41), and the two ends of the round rod (75) are rotatably connected to the rotating hole at the corresponding position respectively. Pull ropes (76) are connected to both sides of the upper pressure tire (1). The other end of the pull rope (76) passes under the round rod (75) at the corresponding position and is connected to the side of the push plate (72) near the slide rod (71).

2. The T-shaped structural component correction device according to claim 1, characterized in that: The upper mold (2) has a T-shaped cross section and a rounded corner (21) at the bottom. Several reinforcing ribs (22) are fixed on both sides of the upper mold (2) to improve strength and are symmetrically distributed. The reinforcing ribs (22) on the same side are evenly distributed, and mounting holes for fixing the upper mold (2) are provided on both sides of the upper end.

3. The T-shaped structural component correction device according to claim 1, characterized in that: The bottom of the upper presser (1) is provided with a first concave groove. The upper end of the upper presser (2) is fixed to the inner side of the first concave groove by bolts to prevent the upper presser (2) from shifting. The upper surface of the base (5) is provided with a second concave groove, and the bottom of the mounting plate (4) is fixed to the inner side of the second concave groove by bolts to prevent the mounting plate (4) from shifting.

4. The T-shaped structural component correction device according to claim 1, characterized in that: The height of the side plate slide rail (42) is smaller than the height of the slide hole (32). A spring hole is provided on the upper inner wall of the slide hole (32), and a thrust spring (34) is provided in the spring hole. A top cover (35) is provided at the end of the thrust spring (34) away from the spring hole, and the lower end of the top cover (35) abuts against the upper surface of the side plate slide rail (42). A gap is provided between the bottom of the lower mold (3) and the mounting plate (4).

5. A T-shaped structural component correction device according to claim 4, characterized in that: The lower surface of the top cover (35) is provided with a graphite coating to reduce the friction between the top cover (35) and the upper surface of the side plate slide rail (42).

6. The T-shaped structural component correction device according to claim 1, characterized in that: The bottom of the lower mold (3) is provided with a widened edge to increase the contact area between it and the mounting plate (4) and prevent the lower mold (3) from tilting when subjected to force.

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