A metal mold processing equipment and processing method

Abstract

This invention relates to the technical field of metal mold processing, and discloses a metal mold processing equipment and method, including auxiliary fixtures and auxiliary tooling. The auxiliary fixtures include a detachably mounted upper fixture and a lower fixture, and further include two detachably mounted limiting fixtures on the top of the upper fixture and the bottom of the lower fixture, a blank groove provided on the surfaces of the upper fixture and the lower fixture close to each other, a boss through groove penetrating the upper fixture and the lower fixture, and a limiting through groove penetrating the limiting fixtures. The blank boss of the blank body passes through the boss through grooves of the upper fixture and the lower fixture respectively, and the inner wall of the limiting through groove fits the outer contour of the blank boss. This application has the effect of improving the efficiency of processing multiple fixtures to accommodate special workpieces.

Description

Technical Field

[0001] This invention relates to the technical field of metal mold processing, and in particular to a metal mold processing equipment and processing method. Background Technology

[0002] Metal molds are molds used in processes such as pressing, injection molding, and extrusion. They have wide applications in industrial production, producing various types of products, such as automotive parts, home appliance components, and electronic product casings. The automotive, electronics, and home appliance industries are the most common users of metal molds.

[0003] Metal mold processing often encounters some special workpieces. These special workpieces have cutting edges or structures similar to cutting edges. If these structures are directly processed, the material at these sharp corners and cutting edges is often less and thinner, lacking effective support. As a result, it is impossible to guarantee the deformation and precision requirements of these special shapes, and damage may occur during transportation.

[0004] Regarding the aforementioned technologies, special workpieces with different cutting edges or similar structures have different shapes or outer contours, requiring the production of multiple fixtures to accommodate them. This results in wasted processing costs and time. Summary of the Invention

[0005] To address the issue of needing to manufacture multiple fixtures to accommodate special workpieces, this application provides a metal mold processing equipment and method.

[0006] In a first aspect, the present invention provides a metal mold processing equipment, which adopts the following technical solution:

[0007] A metal mold processing device includes an auxiliary fixture and auxiliary tooling. The auxiliary fixture includes a detachable upper fixture and a lower fixture, and further includes two limiting fixtures detachably installed on the top of the upper fixture and the bottom of the lower fixture, a blank groove provided on the surfaces of the upper fixture and the lower fixture, a boss through groove passing through the upper fixture and the lower fixture, and a limiting through groove passing through the limiting fixture. The blank boss of the blank body passes through the boss through groove of the upper fixture and the lower fixture respectively, and the inner wall of the limiting through groove fits the outer contour of the blank boss.

[0008] By adopting the above technical solution, the detachable installation of the limiting fixture, upper fixture, and lower fixture allows the operator to select a limiting fixture whose inner wall of the limiting through groove matches the outer contour of the blank boss, and disassemble the fixture into multiple independent units for assembly, thereby reducing processing costs and improving work efficiency.

[0009] Optionally, an alignment structure is provided between the upper clamp and the lower clamp. The alignment structure includes guide protrusions fixedly installed on the surfaces of the upper clamp and the lower clamp that are close to each other. The upper clamp has guide protrusions corresponding to the lower clamp, and the lower clamp has guide grooves corresponding to the upper clamp. The upper clamp and the lower clamp are connected by the cooperation of the guide protrusions and guide grooves.

[0010] By adopting the above technical solution, the guide protrusion of the upper fixture is inserted into the lower fixture through the guide groove, and the guide protrusion of the lower fixture is inserted into the upper fixture through the guide groove, thereby realizing the calibration of the positions of the upper fixture and the lower fixture.

[0011] Optionally, the auxiliary tooling includes a hollow cylinder, four lower angle plates fixedly installed on the top of the hollow cylinder, and an upper angle plate that slides vertically on the top of the four lower angle plates; the upper angle plates correspond to the four apex corners of the upper fixture, and the lower angle plates correspond to the four apex corners of the lower fixture.

[0012] By adopting the above technical solution, the auxiliary fixture is set between the four lower angle plates, the four upper angle plates correspond to the four apex corners of the upper fixture, and the four lower angle plates correspond to the four apex corners of the lower fixture, thereby realizing the secondary calibration of the positions of the upper and lower fixtures.

[0013] Optionally, a lifting structure is provided between the upper angle plate and the lower angle plate. The lifting structure includes a threaded sleeve rotatably installed on the lower angle plate and a threaded rod fixedly installed on the bottom of the upper angle plate. The four threaded rods are respectively threadedly connected to the four threaded sleeves.

[0014] By adopting the above technical solution and setting the locking structure, the threaded sleeve and the threaded rod move relative to each other, and the threaded rod drives the four upper angle plates to rise synchronously, thereby achieving the effect of separating the upper clamp and the lower clamp.

[0015] Optionally, the hollow cylinder is provided with a synchronization structure, which includes a face gear rotatably installed inside the hollow cylinder and a bevel gear coaxially fixed to the bottom end of the threaded sleeve; a plurality of the bevel gears are all meshed with the face gear.

[0016] By adopting the above technical solution, the face gear drives four threaded sleeves to rotate synchronously through four bevel gears, thereby enabling the threaded straight rod to drive four upper angle plates to rise synchronously. This improves the problem that the guide protrusion is easily stuck in the guide groove when the upper and lower clamps are manually moved.

[0017] Optionally, the upper angle plate is provided with a locking structure, which includes a clearance groove on the outer wall of the upper angle plate near the auxiliary clamp, a locking angle plate that slides through the clearance groove in the upper angle plate, and locking grooves at the four corners of the upper clamp; the locking angle plate is engaged with the upper clamp through the locking grooves.

[0018] By adopting the above technical solution, the locking angle plate is directly engaged with the outer wall of the upper fixture through the locking groove. The four locking angle plates correspond to the four locking grooves respectively, so that the four upper angle plates can drive the upper fixture to rise and fall.

[0019] Optionally, the upper angle plate is provided with an expansion structure, the expansion structure including an expansion airbag installed in the upper angle plate through a clearance groove, the expansion airbag being located on the side of the locking angle plate away from the auxiliary clamp, and the expansion airbag being connected to an electric air pump.

[0020] By adopting the above technical solution, the electric air pump injects gas into the inflatable airbag, the inflatable airbag expands and pushes the locking angle plate to the locking groove of the upper clamp; the electric air pump draws air out, causing the inflatable airbag to retract and bringing the locking angle plate back to the clearance groove.

[0021] Optionally, the locking angle plate is provided with an adsorption structure, which includes a magnetic slider vertically fixed to the top of the locking angle plate, an electromagnet fixedly installed on the top of the upper angle plate, and an indicator light fixedly installed on the top of the electromagnet; the upper angle plate is provided with a guide groove facing the direction close to the upper clamp, the magnetic slider passes through the guide groove and exits the upper angle plate, and the electromagnet and the magnetic slider are attracted to each other.

[0022] By adopting the above technical solution, the indicator light is used to determine whether the locking angle plate is engaged with the outer wall of the upper fixture through the locking groove, and the indicator light is used to determine whether the locking angle plate is retracted to the inner side of the clearance groove.

[0023] Secondly, the present invention provides a metal mold processing method for operating the aforementioned metal mold processing equipment, comprising the following steps:

[0024] S1. The mold blank is placed between the upper fixture and the lower fixture. At this time, the upper fixture and the lower fixture are aligned by the alignment structure to achieve position calibration.

[0025] S2. Select a limiting fixture whose inner wall of the limiting through groove fits the outer contour of the blank boss. The two limiting fixtures are fixedly installed on the top of the upper fixture and the bottom of the lower fixture, respectively.

[0026] S3. The assembled auxiliary fixture is placed on the processing machine tool for processing. The processed auxiliary fixture is placed on the top of the hollow cylinder. The upper fixture is set between the four upper angle plates, and the lower fixture is set between the four lower angle plates.

[0027] S4. The expansion structure is activated and the locking angle plate is pushed to the locking groove of the upper fixture. The four locking angle plates correspond to the four locking grooves respectively, and the magnetic slider and electromagnet are separated from each other.

[0028] S5. The indicator light is used to determine whether the locking angle plate is engaged with the outer wall of the upper fixture through the locking groove. If not, the indicator light will not turn off; if it is, the indicator light will turn off immediately.

[0029] S6. The synchronous structure drives the four upper corner plates to rise synchronously through the lifting structure. The upper and lower clamps can be separated to replace the mold blank.

[0030] S7. The expansion structure brings the locking angle plate back to the relief groove, and the electromagnet and magnetic slider are magnetically attracted to make the indicator light up.

[0031] S8. Repeat steps S1-S2 to assemble the auxiliary fixture.

[0032] By adopting the above technical solution, the upper and lower clamps can be separated through the locking and lifting structures to replace the mold blank. This improves the problem that the guide protrusion is easily stuck in the guide groove when the upper and lower clamps are manually moved. The indicator light can be used to determine whether the locking angle plate is engaged with the outer wall of the upper clamp through the locking groove, and the indicator light can be used to determine whether the locking angle plate is retracted to the inner side of the clearance groove.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The guide protrusion of the upper fixture is directly inserted into the lower fixture through the guide groove, and the guide protrusion of the lower fixture is directly inserted into the upper fixture through the guide groove, so as to realize the calibration of the position of the upper fixture and the lower fixture;

[0035] 2. The face gear drives four threaded sleeves to rotate synchronously through four bevel gears, and the threaded straight rod drives four upper angle plates to rise synchronously, which improves the problem that the guide protrusion is easy to get stuck in the guide groove when the upper and lower clamps are moved apart;

[0036] 3. The indicator light can be used to determine whether the locking angle plate is engaged with the outer wall of the upper fixture through the locking groove, and the indicator light can be used to determine whether the locking angle plate is retracted into the inner side of the clearance groove. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the structure of the metal mold processing equipment in the embodiments of this application.

[0038] Figure 2 This is an exploded view of the auxiliary fixture in the embodiments of this application.

[0039] Figure 3 This is a schematic diagram of the upper and lower clamps in the embodiments of this application.

[0040] Figure 4 This is an exploded view of the auxiliary tooling in the embodiments of this application.

[0041] Figure 5 This is an exploded view of the internal structure of the upper angle plate in an embodiment of this application.

[0042] Reference numerals: 11. Auxiliary fixture; 12. Auxiliary tooling; 13. Mold blank; 14. Blank body; 15. Blank boss; 16. Upper fixture; 17. Lower fixture; 18. Countersunk threaded hole; 19. Blank groove; 20. Boss through groove; 21. Assembly groove; 22. Limiting fixture; 23. Limiting through groove; 24. Irregular threaded hole; 25. Guide protrusion; 26. Guide groove; 27. Hollow cylinder; 28. Face gear; 29. ​​Lower angle plate; 30. Threaded sleeve; 31. Bevel gear; 32. Upper angle plate; 33. Threaded straight rod; 34. Worm gear; 35. Worm; 36. Handle; 37. Clearance groove; 38. Inflatable airbag; 39. Locking angle plate; 40. Locking groove; 41. Magnetic slider; 42. Guide groove; 43. Electromagnet; 44. Indicator light. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0044] Reference Figure 1-3 As shown, a metal mold processing equipment includes an auxiliary fixture 11 for supporting a mold blank 13 and an auxiliary tooling 12 for assembling the auxiliary fixture 11. The mold blank 13 includes a blank body 14 and blank bosses 15 integrally formed on the top and bottom surfaces of the blank body 14. The auxiliary fixture 11 includes an upper fixture 16 and a lower fixture 17 located below the upper fixture 16. The upper fixture 16 has countersunk threaded holes 18 at its top near its four edges. The countersunk threaded holes 18 are vertically inserted into the lower fixture 17, achieving the effect of fixing the upper fixture 16 and the lower fixture 17 together with countersunk bolts. The bottom of the upper clamp 16 and the top of the lower clamp 17 are provided with blank grooves 19. The cavity formed by the combination of the blank grooves 19 of the upper clamp 16 and the lower clamp 17 is used to place the blank body 14. The top of the upper clamp 16 and the bottom of the lower clamp 17 are provided with boss through grooves 20.

[0045] Reference Figure 1-3 As shown, the blank bosses 15 at the top and bottom of the blank body 14 pass through the boss through slots 20 of the upper clamp 16 and the lower clamp 17, respectively. The top of the upper clamp 16 and the bottom of the lower clamp 17 are provided with assembly grooves 21. The assembly grooves 21 and the blank grooves 19 are both connected to the boss through slots 20. The upper clamp 16 and the lower clamp 17 are provided with limiting clamps 22 through the assembly grooves 21. The limiting clamps 22 have limiting through slots 23 in the vertical direction. The inner wall of the limiting through slots 23 fits against the outer contour of the blank bosses 15, thereby realizing the support of the blank bosses 15 by the limiting clamps 22. The top of the limiting clamp 22 is provided with irregular threaded holes 24 at its four corners. The four irregular threaded holes 24 are vertically inserted into the bottom of the corresponding assembly groove 21, so that the two limiting clamps 22 are fixedly connected to the upper clamp 16 and the lower clamp 17 respectively by countersunk bolts.

[0046] Reference Figure 2-4 As shown, the bottom of the upper clamp 16 and the top of the lower clamp 17 are respectively fixedly installed with U-shaped guide protrusions 25, which are symmetrically arranged. The bottom of the upper clamp 16 corresponds to the guide protrusion 25 of the lower clamp 17, and the top of the lower clamp 17 corresponds to the guide protrusion 25 of the upper clamp 16. Guide grooves 26 are provided on both sides, corresponding to the guide protrusion 25 of the lower clamp 17. The upper clamp 16 and the lower clamp 17 are aligned through the cooperation of the guide protrusions 25 and the guide grooves 26. The auxiliary tooling 12 includes a hollow cylinder 27 and a face gear 28 rotatably installed inside the hollow cylinder 27. Four lower angle plates 29 are fixedly installed on the top of the hollow cylinder 27. A threaded sleeve 30 is vertically inserted through the top of the lower angle plate 29. The bottom end of the threaded sleeve 30 is inserted through the inner side of the hollow cylinder 27 and a bevel gear 31 is fixed coaxially thereon. The four lower angle plates 29 correspond to the four apex corners of the auxiliary clamp 11 respectively.

[0047] Reference Figure 3-5As shown, threaded sleeves 30 are rotatably mounted on lower angle plates 29, and four bevel gears 31 are all meshed with face gears 28. Upper angle plates 32 slide vertically from the top of the four lower angle plates 29, and threaded rods 33 are vertically fixed to the bottom of the upper angle plates 32. The four threaded rods 33 are threadedly connected to the four threaded sleeves 30, and the four upper angle plates 32 correspond to the four apex corners of the auxiliary clamp 11. A worm gear 34 is rotatably mounted on the bottom of the hollow cylinder 27, and the worm gear 34 is coaxially fixed with the face gear 28. A worm 35 is horizontally inserted through the circumference of the hollow cylinder 27, with one end of the worm 35 passing through the inner side of the hollow cylinder 27 and meshing with the worm gear 34. The other end of the worm 35 passes through the outer side of the hollow cylinder 27 and is coaxially fixed with a handle 36. The four upper angle plates 32 have clearance grooves 37 near the outer wall of the auxiliary clamp 11. An inflatable airbag 38 is installed on the upper angle plate 32 through the clearance groove 37.

[0048] Reference Figure 2 and Figure 5 An inflatable airbag 38 is connected to an electric air pump via an air tube. A locking angle plate 39 is provided on the side of the inflatable airbag 38 near the auxiliary clamp 11. Locking grooves 40 are provided at the four corners of the upper clamp 16. The four locking angle plates 39 are respectively engaged with the outer wall of the upper clamp 16 through the four locking grooves 40. A magnetic slider 41 is vertically fixed to the top of the locking angle plate 39. A guide groove 42 is provided on the top of the upper angle plate 32 along the direction near the upper clamp 16. The magnetic slider 41 passes through the guide groove 42 and extends out of the top of the upper angle plate 32, achieving the effect of sliding the locking angle plate 39 along the direction near the upper clamp 16. An electromagnet 43 is vertically fixed to the top of the upper angle plate 32. The electromagnet 43 is located on the side of the magnetic slider 41 away from the upper clamp 16, and the electromagnet 43 and the magnetic slider 41 are attracted to each other. An indicator light 44 is fixedly installed on the top of the electromagnet 43.

[0049] A method for processing metal molds, comprising operating the aforementioned metal mold processing equipment, includes the following steps:

[0050] S1. The mold blank 13 is placed between the upper clamp 16 and the lower clamp 17 through the blank groove 19. The blank body 14 is placed in the cavity formed by the blank groove 19 of the upper clamp 16 and the lower clamp 17. The blank bosses 15 at the top and bottom of the blank body 14 pass through the boss through slots 20 to the upper clamp 16 and the lower clamp 17 respectively.

[0051] S2. At this time, the guide protrusion 25 of the upper clamp 16 is fully inserted into the lower clamp 17 through the guide groove 26, and the guide protrusion 25 of the lower clamp 17 is fully inserted into the upper clamp 16 through the guide groove 26, thereby calibrating the positions of the upper clamp 16 and the lower clamp 17.

[0052] S3. Four countersunk bolts are screwed into the upper clamp 16 and the lower clamp 17 through the four countersunk threaded holes 18 respectively, so as to achieve a fixed connection between the upper clamp 16 and the lower clamp 17.

[0053] S4. Select a limiting clamp 22 whose inner wall of the limiting through groove 23 fits with the outer contour of the blank boss 15. The two limiting clamps 22 are placed on the top of the upper clamp 16 and the bottom of the lower clamp 17 respectively through the assembly groove 21. Several countersunk bolts fix the two limiting clamps 22 to the top of the upper clamp 16 and the bottom of the lower clamp 17 respectively.

[0054] S5. The assembled auxiliary fixture 11 is placed on the machining machine tool to process the blank boss 15 of the mold blank 13. The processed auxiliary fixture 11 is placed on the top of the hollow cylinder 27. At this time, the auxiliary fixture 11 is set between the four lower corner plates 29. The four upper corner plates 32 correspond to the four top corners of the upper fixture 16, and the four lower corner plates 29 correspond to the four top corners of the lower fixture 17.

[0055] S6. The electric air pump injects gas into the interior of the inflatable airbag 38. The inflatable airbag 38 expands and pushes the locking angle plate 39 to the locking groove 40 of the upper clamp 16 until the locking angle plate 39 is completely engaged with the outer wall of the upper clamp 16 through the locking groove 40. The four locking angle plates 39 correspond to the four locking grooves 40 respectively.

[0056] S7. The magnetic slider 41 and the electromagnet 43 are separated from each other. The indicator light 44 is used to determine whether the locking angle plate 39 is engaged with the outer wall of the upper clamp 16 through the locking groove 40. If not, the indicator light 44 will not turn off. If it is, the indicator light 44 will turn off immediately.

[0057] S8, the handle 36 drives the worm wheel 34 to rotate through the worm 35, the rotating worm wheel 34 drives the four bevel gears 31 to rotate synchronously through the face gear 28, the four bevel gears 31 drive the four threaded sleeves 30 to rotate respectively, the threaded sleeves 30 and the threaded rod 33 move relative to each other, the threaded rod 33 drives the four upper angle plates 32 to rise and fall vertically synchronously, thereby improving the situation where the guide protrusion 25 is easily stuck inside the guide groove 26 when the upper clamp 16 and the lower clamp 17 are manually moved apart;

[0058] S9, the upper fixture 16 and the lower fixture 17 are opened to replace the mold blank 13. The electric air pump draws air to make the expansion airbag 38 retract and bring the locking angle plate 39 back to the relief groove 37. The electromagnet 43 and the magnetic slider 41 magnetically attract each other to make the indicator light 44 light up. The indicator light 44 is used to determine whether the locking angle plate 39 has retracted to the inside of the relief groove 37.

[0059] S10. Repeat steps S1-S5 to assemble the auxiliary fixture 11.

[0060] 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 metal mold processing device, comprising an auxiliary fixture (11) and an auxiliary tooling (12), wherein the auxiliary fixture (11) comprises a detachably mounted upper fixture (16) and a lower fixture (17), characterized in that: It also includes two detachable limiting clamps (22) installed on the top of the upper clamp (16) and the bottom of the lower clamp (17), a blank groove (19) provided on the surface of the upper clamp (16) and the lower clamp (17) close to each other, a boss through groove (20) penetrating the upper clamp (16) and the lower clamp (17), and a limiting through groove (23) penetrating the limiting clamp (22); the blank boss (15) of the blank body (14) passes through the boss through groove (20) of the upper clamp (16) and the lower clamp (17) respectively, and the inner wall of the limiting through groove (23) fits the outer contour of the blank boss (15); An alignment structure is provided between the upper clamp (16) and the lower clamp (17). The alignment structure includes a guide protrusion (25) fixedly installed on the surfaces of the upper clamp (16) and the lower clamp (17) that are close to each other. The upper clamp (16) has a guide protrusion (25) corresponding to the lower clamp (17), and the lower clamp (17) has a guide groove (26) corresponding to the guide protrusion (25) of the upper clamp (16). The upper clamp (16) and the lower clamp (17) are connected by the cooperation of the guide protrusion (25) and the guide groove (26). The auxiliary tooling (12) includes a hollow cylinder (27), four lower angle plates (29) fixedly installed on the top of the hollow cylinder (27), and an upper angle plate (32) that slides vertically on the top of the four lower angle plates (29); the upper angle plates (32) correspond to the four apex corners of the upper fixture (16), and the lower angle plates (29) correspond to the four apex corners of the lower fixture (17); The upper angle plate (32) is provided with a locking structure, which includes a clearance groove (37) on the outer wall of the upper angle plate (32) near the auxiliary clamp (11), a locking angle plate (39) that slides through the clearance groove (37) in the upper angle plate (32), and locking grooves (40) at the four corners of the upper clamp (16); the locking angle plate (39) is engaged with the upper clamp (16) through the locking grooves (40); The upper angle plate (32) is provided with an expansion structure, the expansion structure includes an expansion airbag (38) installed in the upper angle plate (32) through a relief groove (37), the expansion airbag (38) is located on the side of the locking angle plate (39) away from the auxiliary clamp (11), and the expansion airbag (38) is connected to an electric air pump; The locking angle plate (39) is provided with an adsorption structure, which includes a magnetic slider (41) vertically fixed to the top of the locking angle plate (39), an electromagnet (43) fixedly installed on the top of the upper angle plate (32), and an indicator light (44) fixedly installed on the top of the electromagnet (43). The upper angle plate (32) is provided with a guide groove (42) facing the direction close to the upper clamp (16). The magnetic slider (41) passes through the guide groove (42) and exits the upper angle plate (32). The electromagnet (43) and the magnetic slider (41) are attracted to each other.

2. The metal mold processing equipment according to claim 1, characterized in that: A lifting structure is provided between the upper angle plate (32) and the lower angle plate (29). The lifting structure includes a threaded sleeve (30) rotatably installed on the lower angle plate (29) and a threaded rod (33) fixedly installed on the bottom of the upper angle plate (32). The four threaded rods (33) are respectively threadedly connected to the four threaded sleeves (30).

3. The metal mold processing equipment according to claim 2, characterized in that: The hollow cylinder (27) is provided with a synchronization structure, which includes a face gear (28) rotatably installed inside the hollow cylinder (27) and a bevel gear (31) coaxially fixed to the bottom end of the threaded sleeve (30); a plurality of the bevel gears (31) are meshed with the face gear (28).

4. A method for processing metal molds, used to operate the metal mold processing equipment described in claim 3, characterized in that, Includes the following steps: S1. The mold blank (13) is placed between the upper fixture (16) and the lower fixture (17). At this time, the upper fixture (16) and the lower fixture (17) are aligned by the alignment structure to achieve position calibration. S2. Select a limiting clamp (22) whose inner wall of the limiting through groove (23) fits the outer contour of the blank boss (15). The two limiting clamps (22) are respectively fixedly installed on the top of the upper clamp (16) and the bottom of the lower clamp (17). S3. The assembled auxiliary fixture (11) is placed on the processing machine tool for processing. The processed auxiliary fixture (11) is placed on the top of the hollow cylinder (27). The upper fixture (16) is located between the four upper angle plates (32), and the lower fixture (17) is located between the four lower angle plates (29). S4. The expansion structure is activated and the locking angle plate (39) is pushed to the locking groove (40) of the upper clamp (16). The four locking angle plates (39) correspond to the four locking grooves (40) respectively, and the magnetic slider (41) and the electromagnet (43) are separated from each other. S5. The indicator light (44) is used to determine whether the locking angle plate (39) is engaged with the outer wall of the upper clamp (16) through the locking groove (40). If not, the indicator light (44) will not be turned off. If it is, the indicator light (44) will be turned off immediately. S6. The synchronous structure drives the four upper corner plates (32) to rise synchronously through the lifting structure. The upper clamp (16) and the lower clamp (17) can be separated to replace the mold blank (13). S7. The expansion structure brings the locking angle plate (39) back to the relief groove (37), and the electromagnet (43) and the magnetic slider (41) are magnetically attracted to make the indicator light (44) light up. S8. Repeat steps S1-S2 to assemble the auxiliary fixture (11).

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