Rear template locking device for movable template of die-casting machine

Abstract

The utility model discloses a locking device for a movable template and a rear template of a die-casting machine, which belongs to the technical field of die-casting machines and comprises the movable template and the rear template which are arranged in parallel, the movable template is provided with butt joint grooves, the rear template is provided with connecting bosses, and the connecting bosses and the butt joint grooves are arranged in a one-to-one correspondence manner; the butt joint groove is provided with a band-type brake assembly, the band-type brake assembly comprises a first brake base and a second brake base, the connecting boss can stretch into the position between the second brake base and the first brake base, and the first brake base can be close to or away from the second brake base. According to the utility model, the butt joint precision of the movable template and the rear template can be ensured, the stability in the locking process is improved, and the mold closing resistance is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of die-casting machines, and in particular relates to a rear template locking device for a movable template of a die-casting machine. Background Art

[0002] The essence of die casting is to pour molten or semi-molten alloy into the pressure chamber of the die casting machine, and then fill the cavity of the die casting mold at an extremely high speed under the action of high pressure, and then cool and solidify the molten alloy under high pressure to form a high-efficiency and high-efficiency precision casting method.

[0003] The die-casting machine's mold clamping structure is mostly a three-platen mold clamping structure, and the movable template and the rear template are guided by the Coring column for movement and docking. In the die-casting process of the three-platen structure, the die-casting mold is installed on the model surface of the template, and the relative fixation and release between the movable template and the rear template are coordinated to perform tightening and loosening. In the process of tightening and loosening between the movable template and the rear template, due to the inevitable fitting gap in the guide structure of the two movable templates moving on the Coring column, in the process of tightening and loosening, it is easy for the movable template and the rear template to fail to tighten and deviate from the positioning after tightening. If the tightening and docking position of the middle plate is inaccurate, the die-casting model may be misplaced.

[0004] Utility model patent No. JP4885475B2 discloses a mold clamping device for a die-casting machine, etc. The device comprises a base; a movable platen configured to move forward and backward facing a fixed platen; a guide disposed on the base to guide the movable platen's forward and backward movement; a first drive device for moving the platen forward and backward on the guide device; and a second drive device disposed between the platen and the movable platen, which applies a clamping force, and tie rods extending through the mold corners. Each platen can accommodate a universal master mold that removably secures and retains inserts. The inserts can be moved into the mold opening without interfering with tie rods extending through the upper or side surfaces of the platen. When the inserts are separated from the universal master platen and secured to the mold, and the movable platen is in the closed position, the mold height is nearly zero. However, this solution makes it difficult to precisely control the direction of movement of the movable platen, which can easily lead to wear of the movable platen and cause undesirable conditions such as jamming.

[0005] The utility model application with publication number US20030217829A1 discloses a double-platen die-casting machine. This utility model patent positions and limits the movable platen by means of a threaded sleeve piston, and provides a clamping and enhanced pressure by means of hydraulic oil in the sleeved piston cylinder. In this solution, the joint force between the movable platen and the rear platen is good, but the locking structure itself is relatively complex, and it is easy for the clamping to fail and the die-casting work to continue when problems occur with the piston cylinder components and the limiting thread teeth, and the docking accuracy between the movable platen and the rear platen may not be accurate enough. Utility Model Content

[0006] The purpose of the utility model is to provide a die-casting machine movable template and rear template locking device with simple structure and easy maintenance, which can ensure the docking accuracy of the movable template and the rear template, improve the smoothness of the locking process, and reduce the mold closing resistance.

[0007] The technical solutions adopted by the present invention to achieve the above-mentioned purpose are:

[0008] A locking device for a movable die plate and a rear die plate of a die-casting machine comprises a movable die plate and a rear die plate arranged in parallel, wherein a docking groove is arranged on a side of the movable die plate facing the rear die plate, and a connecting boss is arranged on a side of the rear die plate facing the movable die plate, wherein the connecting boss and the docking groove are arranged in a one-to-one correspondence;

[0009] The docking slot is equipped with a brake assembly, which includes a first gate seat and a second gate seat arranged opposite to each other. The connecting boss can extend between the second gate seat and the first gate seat, and the first gate seat can approach or move away from the second gate seat to achieve locking or releasing of the connecting boss.

[0010] With this technical solution, when the movable template and the rear template are in close proximity, the reciprocating movement of the first gate seat relative to the second gate seat in the brake assembly locks or releases the brake on the connecting boss, thereby achieving engagement and release between the movable template and the rear template. The first gate seat cooperates with the brake cylinder, which drives the reciprocating movement of the first gate seat, ensuring the precise movement of the first gate seat and, consequently, the precise braking of the connecting boss.

[0011] Furthermore, the use of connecting bosses and docking grooves to lock the die-casting machine's moving platen and rear platen ensures accurate docking positions, preventing the moving platen from misaligning or shifting, further enhancing the locking effect. Multiple sets of connecting bosses and docking grooves can be symmetrically arranged as needed, not only ensuring the accuracy of the relative positioning of the moving platen and rear platen but also improving the balance of force applied to the moving platen during the locking process, further preventing misalignment or shifting.

[0012] According to an embodiment of the present invention, a plurality of docking grooves are evenly dispersedly arranged on the outer edge of the movable template, and the docking grooves are symmetrically arranged in pairs.

[0013] Furthermore, the four corners of the square moving and rear templates are provided with through-holes for inserting the coring posts. The docking slots on the moving template and the connecting bosses on the rear template are positioned between two adjacent through-holes. Multiple brake assemblies operate synchronously, with the second brake seats in two symmetrically arranged brake assemblies operating in opposite directions.

[0014] According to one embodiment of the present invention, the inner diameter of the docking groove gradually decreases from the surface of the movable template toward the inside, and the outer wall of the brake assembly is flush with the open end surface of the docking groove, thereby further improving positioning accuracy.

[0015] According to one embodiment of the present invention, the inner wall of the docking groove has a plurality of circular grooves with decreasing diameters, and the plurality of circular grooves are arranged in a stepped manner. A first rubber ring is provided in any circular groove and is fitted with the groove wall.

[0016] In this way, the lateral displacement of the connecting boss relative to the docking groove during the locking process can be avoided, that is, the moving template can be limited by the cooperation between the docking groove and the connecting boss, or in other words, the cooperation between the connecting boss and the docking groove can achieve fine adjustment of the moving direction and angle of the moving template, which can improve the accuracy of the moving direction of the moving template during the locking process, ensure the parallelism of the moving template with the rear template and other components during the movement process, avoid jamming, thereby reducing wear and ensuring the structural stability of the device. The method of setting a first rubber ring inside the docking groove can further solve the problems of assembly wear and whether the assembly is in place.

[0017] The cooperation between the connecting boss and the docking groove can improve the stability of the movable template during the locking process, prevent the movable template from deflecting or shifting sideways, thereby improving the smoothness of the locking process and reducing the difficulty of locking.

[0018] According to one embodiment of the present invention, the end face of the movable template is provided with an annular docking end cap, which surrounds the outer edge of the docking groove. Correspondingly, the end face of the rear template facing the movable template may also be provided with an annular gasket, which surrounds the periphery of the connecting boss and corresponds to the docking end cap. The docking end cap and gasket may be made of a flexible material, such as rubber, as needed.

[0019] The docking end cap protects the brake assembly. During the initial stage of mating between the connecting boss and the docking groove, the docking end cap prevents the connecting boss from directly impacting the brake assembly. Instead, it passes between the second and first brake seats in the brake assembly, guiding the connecting boss during this process.

[0020] In addition, during the locking process of the movable template and the rear template, the connecting boss extends into the interior of the docking groove, and the docking end cover abuts against the gasket, which can achieve buffering and protect the rear template and the movable template, avoiding deformation of the connecting boss or other structures due to excessive impact force between the two during the locking process, thereby extending the life of the equipment.

[0021] Furthermore, the matching structure of the docking end cover and the gasket can reduce the movement speed of the connecting boss after it extends into the docking groove, thereby avoiding wear and damage to the docking groove caused by the connecting boss.

[0022] According to one embodiment of the present invention, a brake block hole is configured on the inner wall of the docking slot. The brake assembly includes a pull rod that extends through the brake block hole. The second and first brake seats are both engaged with the pull rod and are both located within the docking slot. This ensures a secure connection between the brake assembly and the docking slot.

[0023] According to an embodiment of the present invention, the rear template is provided with a positioning groove, the connecting boss is arranged in the positioning groove, and one end of the connecting boss is exposed outside the positioning groove.

[0024] According to an embodiment of the present invention, the connecting boss is a hollow structure; a cavity communicating with the outside is provided inside the connecting boss.

[0025] In this way, during the process of connecting the boss and the docking groove, the internal cavity is connected to the docking groove, which can promote the flow of air and help reduce the air pressure inside the docking groove, thereby reducing the resistance of the docking and locking process and improving the locking efficiency.

[0026] According to one embodiment of the present invention, the connecting boss includes a first base and a second base fixedly connected, an end of the first base away from the second base is connected to the rear template, and an end of the second base away from the first base is exposed outside the end surface of the rear template;

[0027] A first cavity is provided inside the first base, and the second base is a tubular structure, and a second cavity with openings at both ends is provided inside it. The first cavity is connected to the second cavity, and the connecting end of the second base and the first base is provided with a connecting flange, and the connecting end of the second cavity and the first cavity is an outward-expanding structure.

[0028] Therefore, the matching structure of the first cavity and the second cavity enables the cavity inside the connecting boss to be connected with the outside world. During the matching process between the connecting boss and the docking groove, the gas inside the docking groove can enter the second cavity or even the inside of the first cavity, thereby making the air pressure inside the connecting boss relatively higher. In this way, in the process of the brake assembly releasing the brake on the connecting boss and moving the template away from the rear template, the slightly higher air pressure on the inner wall of the first cavity and the second cavity than the outside makes the process of the connecting boss detaching from the docking groove smoother, thereby reducing the mold opening resistance.

[0029] The outer wall of the second base is provided with a rubber ring assembly, which includes a circular inner ring, and at least two outer rings are arranged around the outside of the inner ring. The outer rings are arranged in an arc-shaped structure, and there is a spacing distance between the ends of the outer rings. Further setting of the rubber ring assembly can achieve a buffering effect during the braking and moving away process, making docking and disengagement smoother, and utilizing the inner ring and of the rubber ring assembly for buffering and release respectively.

[0030] In particular, the setting of the outward expansion structure at the connecting end of the second cavity and the first cavity enables the squeezed gas inside the docking groove to enter the interior of the second cavity and the first cavity more smoothly when the connecting boss extends into the docking groove, thereby forming a suction effect on the gas inside the docking groove; and in the process of the connecting boss detaching from the docking groove, due to the setting of the outward expansion structure at the end of the second cavity, the gas inside the first cavity can be avoided from being discharged in large quantities in an instant, thereby ensuring that the air pressure inside the docking groove changes slowly and steadily, which helps to improve the stability of the process of moving the template away from the rear template.

[0031] According to one embodiment of the present invention, an ejector plate is positioned in the middle of the movable platen, equipped with an ejector cylinder for driving the platen's reciprocating motion. The movable platen is provided with a hollow cavity, within which the ejector plate is positioned. The reciprocating motion of the ejector plate enables ejection of the die-casting mold and the die-casting part.

[0032] Therefore, the die-casting machine rear template locking device of the utility model has a simple structure and is easy to operate, and can ensure docking accuracy, improve the stability of the locking process, and reduce mold closing resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0034] Figure 1 Schematic diagram of the matching structure of the die-casting machine's rear platen locking device according to Example 1 of the present utility model;

[0035] Figure 2 for Figure 1 The structural diagram of the mobile template shown;

[0036] Figure 3 for Figure 2 Schematic diagram of the partial assembly structure of the mobile template shown;

[0037] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure of the middle part A;

[0038] Figure 5 for Figure 3 A schematic diagram of the partially enlarged structure of part B in the middle;

[0039] Figure 6 for Figure 2 The structural diagram of the brake assembly shown;

[0040] Figure 7 for Figure 1 A schematic diagram of a partial assembly structure of the rear template shown;

[0041] Figure 8 Schematic diagram of the cross-sectional structure of the movable template according to embodiment 2 of the present utility model;

[0042] Figure 9 for Figure 8 A schematic diagram of the partially enlarged structure of the middle C part;

[0043] Figure 10 This is a schematic diagram of the internal structure of the connecting boss according to Example 2 of the present utility model;

[0044] Figure 11 This is a schematic structural diagram of the rubber ring assembly of the present utility model.

[0045] Figure numbers: front template 10; movable template 11; rear template 12; Corinth column 13; movable cylinder 14; docking groove 20; brake block hole 21; docking end cover 22; positioning groove 23; connecting boss 24; gasket 25; ejector plate 26; first rubber ring 27; brake assembly 30; holding cylinder 31; holding synchronous seat 32; holding piston rod 33; synchronous bracket shaft 34; first brake seat 35; second brake seat 36; first base 41; second base 42; first cavity 43; second cavity 44; rubber ring assembly 45; inner ring 451; outer ring 452. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] The following first describes the concepts involved in this application with reference to the accompanying drawings. It should be noted that the following description of each concept is intended only to make the content of this application easier to understand and does not limit the scope of protection of this application. At the same time, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The following detailed description of this application will be made with reference to the accompanying drawings and in conjunction with the embodiments.

[0048] Example 1

[0049] Figures 1 to 7The figure schematically shows a rear template locking device for a die-casting machine according to an embodiment of the present invention. As shown in the figure, the device includes a rear template 12, a movable template 11, and a front template 10, which are arranged in parallel and in sequence, and through holes are provided at the four corners of the three. Four coring columns 13 pass through the through holes on the rear template 12 and the movable template 11 in sequence and are connected to the front template 10. The movable template 11 is connected to a movable oil cylinder 14, which can drive the movable template 11 to move back and forth and approach or move away from the rear template 12. The movable template 11 is equipped with a brake assembly 30, which can realize the locking and loosening of the movable template 11 and the rear template 12. In conjunction with the mold-moving oil cylinder, the movable template 11 and the rear template 12 can be fixed and separated.

[0050] The side of the movable template 11 facing the rear template 12 is provided with a docking groove 20, and the side of the rear template 12 facing the movable template 11 is provided with a connecting boss 24. The connecting boss 24 is arranged one-to-one with the docking groove 20. Multiple docking grooves 20 are evenly distributed along the outer edge of the movable template 11, and the docking grooves 20 are arranged symmetrically in pairs. Specifically, the docking grooves 20 on the movable template 11 and the connecting bosses 24 on the rear template 12 are correspondingly arranged between two adjacent through-holes.

[0051] The brake assembly 30 is mounted within the docking slot 20 of the movable template 11. It includes a first brake seat 35 and a second brake seat 36 positioned opposite each other. The connecting boss 24 can extend between the second brake seat 36 and the first brake seat 35. The first brake seat 35 can move toward or away from the second brake seat 36 to lock or release the connecting boss 24. Multiple brake assemblies 30 operate synchronously, with the second brake seats 36 in two symmetrically positioned brake assemblies 30 operating in opposite directions.

[0052] When the movable platen 11 and the rear platen 12 are in close proximity, the reciprocating movement of the first brake seat 35 relative to the second brake seat 36 in the brake assembly 30 locks or releases the connecting boss 24, thereby achieving engagement, tightening, and loosening between the movable platen 11 and the rear platen 12. The first brake seat 35 cooperates with the brake cylinder, which drives the reciprocating movement of the first brake seat 35, ensuring the precision of its movement and, therefore, the accuracy of the braking on the connecting boss 24.

[0053] Furthermore, the use of the coupling bosses 24 and the docking grooves 20 to achieve locking of the die-casting machine's movable platen 11 and rear platen 12 ensures the accuracy of the docking position, preventing the movable platen 11 from being misaligned or offset, thereby further ensuring the locking effect. As needed, multiple sets of coupling bosses 24 and docking grooves 20 can be symmetrically arranged, not only ensuring the accuracy of the relative positioning of the movable platen 11 and rear platen 12, but also improving the balance of force applied to the movable platen 11 during the locking process, further preventing misalignment or offset.

[0054] The use of multiple sets of symmetrically arranged docking grooves 20 and connecting bosses 24 can ensure that the force applied to the movable template 11 is balanced during the locking process, thereby avoiding template dislocation or deformation and ensuring the locking effect.

[0055] The inner wall of the docking groove 20 has a plurality of circular grooves with decreasing diameters, and the plurality of circular grooves are arranged in a stepped manner. A first rubber ring 27 is provided in any circular groove to fit the groove wall.

[0056] The method of disposing the first rubber ring 27 inside the docking groove 20 can further solve the problems of assembly wear and whether the assembly is in place.

[0057] In this embodiment, the movable template 11 is provided with four groups of brake assemblies 30, which are divided into two corresponding longitudinal brake units and two corresponding transverse brake units, respectively realizing the braking of the connecting boss 24 on the rear template 12 from the longitudinal and transverse directions.

[0058] Specifically, the brake assembly 30 includes a clamping cylinder 31, the lower end of which is dynamically connected to a clamping piston rod 33. A first brake seat 35 and a second brake seat 36 are located below the clamping piston rod 33. A clamping synchronization seat 32 is fixedly connected to the lower end of the clamping synchronization seat 32. Two symmetrical synchronization support shafts 34 are fixedly connected to the lower end of the synchronization support shafts 34. The lower ends of the synchronization support shafts 34 are fixedly connected to the second brake seat 36. Operation of the clamping cylinder 31 drives the first brake seat 35 toward or away from the second brake seat 36. The first and second brake seats 35, 36 are at least partially configured as arcuate structures, and their arcs are arranged relative to each other to facilitate compatibility with the cylindrical connecting boss 24. The second brake seat 36 has synchronization docking holes on both ends, which are rotatably connected to the synchronization support shafts 34. The first brake seat 35 has through-holes on both ends, which are slidably connected to the two synchronization support shafts 34.

[0059] The inner wall of the docking groove 20 is provided with a brake block hole 21. A pull rod is provided in the brake assembly 30. The pull rod includes a synchronous support shaft 34, a clamping piston rod 33, etc. The synchronous support shaft 34 and the clamping piston rod 33 pass through the brake block hole 21. The second brake seat 36 and the first brake seat 35 are both matched with the pull rod and are both located inside the docking groove 20. In this way, a stable connection between the brake assembly 30 and the docking groove 20 is achieved.

[0060] The end face of the movable template 11 is provided with an annular docking end cap 22, which surrounds the outer edge of the docking groove 20. The rear template 12 is provided with a positioning groove 23, within which a connecting boss 24 is disposed, with one end of the connecting boss 24 exposed outside the positioning groove 23. Correspondingly, the end face of the rear template 12 facing the movable template 11 may also be provided with an annular gasket 25, which surrounds the outer periphery of the connecting boss 24 and is disposed at the open end of the positioning groove 23 and corresponding to the docking end cap 22. The docking end cap 22 and gasket 25 may be made of a flexible material, such as rubber, as needed.

[0061] The docking end cap 22 protects the brake assembly 30. During the initial stage of engagement between the connecting boss 24 and the docking slot 20, the docking end cap 22 prevents the connecting boss 24 from directly impacting the brake assembly 30. Instead, the connecting boss 24 passes between the second brake seat 36 and the first brake seat 35 in the brake assembly 30, guiding the connecting boss 24 during this process.

[0062] In addition, during the locking process of the movable template 11 and the rear template 12, the connecting boss 24 extends into the interior of the docking groove 20, and the docking end cover 22 abuts against the gasket 25, which can achieve buffering and protect the rear template 12 and the movable template 11, avoiding deformation of the connecting boss 24 or other structures due to excessive impact force between the two during the locking process, thereby extending the life of the equipment.

[0063] Furthermore, the matching structure of the docking end cover 22 and the gasket 25 can reduce the movement speed of the connecting boss 24 after it extends into the docking groove 20 , thereby preventing the connecting boss 24 from wearing and damaging the docking groove 20 .

[0064] In addition, an ejector plate 26 is located in the middle of the movable platen 11. This platen 26 is equipped with an ejector cylinder that drives its reciprocating motion. The movable platen 11 is provided with a hollow cavity, and the ejector plate 26 is positioned within the cavity. The reciprocating motion of the ejector plate 26 enables the ejection of the die-casting mold and the die-casting part.

[0065] Example 2

[0066] Figures 8 to 10 The figure schematically shows a die-casting machine movable die plate rear plate locking device according to another embodiment of the present invention, which differs from the embodiment 1 in that:

[0067] The inner diameter of the docking groove 20 gradually decreases from the surface of the movable template 11 inward. The outer wall of the brake assembly 30 is flush with the open end surface of the docking groove 20. This further improves positioning accuracy. In this embodiment, the inner wall of the docking groove 20 is stepped.

[0068] The connecting boss 24 includes a first base 41 and a second base 42 fixedly connected, wherein the end of the first base 41 away from the second base 42 is connected to the rear template 12, and the end of the second base 42 away from the first base 41 is exposed outside the end surface of the rear template 12; the outside of the second base 42 is provided with a step portion, and the end away from the first base 41 has a smaller outer diameter than the end close to the first base 41, so that the shape of the connecting boss 24 is more compatible with the structure of the docking groove 20.

[0069] In this way, the lateral displacement of the connecting boss 24 relative to the docking groove 20 during the locking process can be avoided, that is, the movable template 11 is limited by the cooperation between the docking groove 20 and the connecting boss 24, or in other words, the cooperation between the connecting boss 24 and the docking groove 20 can achieve fine adjustment of the moving direction and angle of the movable template 11, which can improve the accuracy of the moving direction of the movable template 11 during the locking process, ensure the parallelism of the movable template 11 with the rear template 12 and other components during the movement process, avoid jamming, thereby reducing wear and ensuring the structural stability of the device.

[0070] The stepped matching structure of the connecting boss 24 and the docking groove 20 can improve the smoothness of the movable template 11 during the locking process, improve the fine-tuning effect of the moving direction and angle of the movable template 11, prevent the movable template 11 from deflecting or shifting sideways, thereby improving the smoothness of the locking process and reducing the difficulty of locking.

[0071] Furthermore, the connecting boss 24 is hollow and has a cavity inside that communicates with the outside world. Specifically, the first base 41 has a first cavity 43 inside it, while the second base 42 is a tubular structure with a second cavity 44 open at both ends. The first cavity 43 communicates with the second cavity 44, and a connecting flange is provided at the connection end between the second base 42 and the first base 41. The connection end between the second cavity 44 and the first cavity 43 is an outwardly flared structure.

[0072] See attached Figure 11 As shown, the outer wall of the second base 42 is sleeved with a rubber ring assembly 45, and the rubber ring assembly 45 includes a circular inner ring 451, and at least two outer rings 452 are arranged around the outside of the inner ring 451. The outer ring 452 is arranged in an arc-shaped structure, and there is a spacing distance between the ends of the outer ring 452. Further setting of the rubber ring assembly 45 can achieve a buffering effect during the braking and moving away process, making docking and disengagement smoother, and utilizing the inner rings 451 and 452 of the rubber ring assembly 45 for buffering and release respectively.

[0073] Therefore, the matching structure of the first cavity 43 and the second cavity 44 enables the cavity inside the connecting boss 24 to be connected with the outside world. During the matching process between the connecting boss 24 and the docking groove 20, the gas inside the docking groove 20 can enter the second cavity 44 and even the first cavity 43, thereby making the air pressure inside the connecting boss 24 relatively higher. In this way, in the process of the brake assembly 30 releasing the brake on the connecting boss 24 and moving the template 11 away from the rear template 12, the slightly higher air pressure on the inner walls of the first cavity 43 and the second cavity 44 than the outside makes the process of the connecting boss 24 disengaging from the docking groove 20 smoother, thereby reducing the mold opening resistance.

[0074] In particular, the setting of the outward expansion structure at the connecting end of the second cavity 44 and the first cavity 43 enables the squeezed gas inside the docking groove 20 to enter the second cavity 44 and the first cavity 43 more smoothly when the connecting boss 24 extends into the docking groove 20, thereby forming a suction effect on the gas inside the docking groove 20; and in the process of the connecting boss 24 detaching from the docking groove 20, due to the setting of the outward expansion structure at the end of the second cavity 44, the gas inside the first cavity 43 can be avoided from being discharged in large quantities in an instant, thereby ensuring that the air pressure inside the docking groove 20 changes slowly and steadily, which helps to improve the stability of the process of moving the template 11 away from the rear template 12.

[0075] Conventional operations in the operating steps of the present invention are well known to those skilled in the art and will not be described in detail here.

[0076] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A locking device for a movable die plate and a rear die plate of a die casting machine, comprising a movable die plate (11) and a rear die plate (12) arranged in parallel, characterized in that: The movable template (11) is provided with a docking groove (20), and the rear template (12) is provided with a connecting boss (24), wherein the connecting boss (24) is provided in a one-to-one correspondence with the docking groove (20); The connecting boss (24) comprises a first base (41) and a second base (42). The first base (41) is provided with a first cavity (43) therein, the second base (42) is a tubular structure, and is provided with a second cavity (44) with two ends open therein, the first cavity (43) is communicated with the second cavity (44), and the connection end between the second cavity (44) and the first cavity (43) is an outward expansion structure; The outer wall of the second base body (42) is provided with a rubber ring assembly (45).

2. The die casting machine movable template rear template locking device according to claim 1, characterized in that: The docking groove (20) is provided with a brake assembly (30), and the brake assembly (30) includes a first gate seat (35) and a second gate seat (36). The connecting boss (24) can extend between the second gate seat (36) and the first gate seat (35), and the first gate seat (35) can approach or move away from the second gate seat (36).

3. The die casting machine movable template rear template locking device according to claim 2, characterized in that: From the surface of the movable template (11) toward the inside, the inner diameter of the docking groove (20) gradually decreases; the outer wall of the brake assembly (30) is arranged flush with the open end surface of the docking groove (20).

4. The die casting machine movable die plate rear template locking device according to claim 3, characterized in that: The inner wall of the docking groove (20) has a plurality of circular grooves with decreasing diameters, and the plurality of circular grooves are arranged in a stepped manner. A first rubber ring (27) is provided in any circular groove and is fitted with the groove wall.

5. The die casting machine movable die plate rear template locking device according to claim 3, characterized in that: The movable template (11) is provided with an annular docking end cover (22), and the docking end cover (22) is arranged around the outer edge of the docking groove (20).

6. The die casting machine movable template rear template locking device according to claim 2, characterized in that: The inner wall of the docking groove (20) is provided with a brake block hole (21), the brake assembly (30) includes a pull rod, the pull rod passes through the brake block hole (21), the second gate seat (36) and the first gate seat (35) are both matched with the pull rod and the second gate seat (36) and the first gate seat (35) are both arranged inside the docking groove (20).

7. The die casting machine movable die plate rear template locking device according to claim 1, characterized in that: The rear template (12) is provided with a positioning groove (23), and the connecting boss (24) is arranged in the positioning groove (23).

8. The die casting machine movable die plate rear template locking device according to claim 1, characterized in that: A cavity is provided inside the connecting boss (24), and the cavity is communicated with the outside.

9. The die casting machine movable die plate rear template locking device according to claim 8, characterized in that: A plurality of the docking grooves (20) are evenly dispersed and arranged on the outer edge of the movable template (11), and the docking grooves (20) are symmetrically arranged in pairs.

10. The die casting machine movable die plate rear template locking device according to claim 1, characterized in that: The rubber ring assembly (45) includes an annular inner ring (451), and at least two outer rings (452) are arranged around the outer side of the inner ring (451). The outer rings (452) are arranged in an arc-shaped structure, and there is a spacing distance between the ends of the outer rings (452).

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