A mold with an automatic unloading mechanism

Abstract

The present application relates to the technical field of mould, more particularly, to a mould with automatic unloading mechanism, comprising an upper die assembly provided with a punch, a lower die assembly provided with a die hole, the punch is arranged corresponding to the die hole, and an unloading plate arranged between the upper die assembly and the lower die assembly, the unloading plate is slidingly assembled on the upper die assembly; the unloading structure of the present application is assembled on the original structure of the mould, has good versatility, forms regular unloading action along with the up-down movement of the mould, the locking of the draw hook and the bottom hook seat is synchronized with the mould, the action does not interfere, has high stability, does not need additional driving source input and control, has the advantages of simple structure and low use cost, and effectively solves the technical problems of high use cost and difficult control of the unloading device in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a mold, and more particularly to a mold with an automatic unloading mechanism. BACKGROUND

[0002] Punching dies have been used more and more widely due to their high production efficiency. However, most of the existing punching dies do not have unloading devices for unloading the punched material. After punching, it is difficult to unload the material, which causes the punched product to be uneven and the bright part to be irregular, thereby resulting in a decrease in the quality of the product.

[0003] The prior art provides a punching die with an unloading device, which includes a lower die seat provided with a die hole and an upper die seat provided with a punch. The punch is arranged corresponding to the die hole and performs punching on a product placed on the lower die seat due to the relative movement between the upper die seat and the lower die seat. An unloading part is formed in the lower die seat and communicates with the die hole to allow the punched material to flow out of the die hole. A product pressing mechanism is arranged on the lower die seat and applies a pressing force to the product on the side of the punch when the punch is separated from the product. The product pressing mechanism includes a driving part arranged on the lower die seat and a pressing part with a pressing end in transmission connection with the driving end of the driving part. The pressing end can be arranged on the product due to the driving of the driving part, and a through hole is formed in the pressing end for the punch to pass through. This scheme can press the product on the side of the punch when the punch is separated from the product, thereby avoiding defects such as unevenness and irregularity at the punched part of the product due to the material carrying effect of the punch, ensuring the quality of the punched product, and facilitating the arrangement of the pressing part on the lower die seat and the pressing of the product under the driving of the driving part.

[0004] However, the unloading device of the prior art needs to be driven by a driving source to press the product, which not only requires additional energy consumption but also needs to accurately control the driving source to match the continuous punching of the mold. If the pressing action does not match the punching, the product will fall off from the lower die seat or the punched product will be uneven, thereby failing to ensure the quality of the punched product and causing technical problems such as high use cost and difficult control of the unloading device. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art, such as high use cost and difficult control of the unloading device, and provides a mold with an automatic unloading mechanism.

[0006] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0007] The application provides a die with an automatic unloading mechanism, which comprises an upper die assembly provided with a punch and a lower die assembly provided with a die hole, the punch is arranged correspondingly to the die hole and performs punching on a workpiece arranged on the lower die assembly due to relative movement of the upper die assembly and the lower die assembly, and the die further comprises an unloading plate arranged between the upper die assembly and the lower die assembly, the unloading plate is slidingly assembled to the upper die assembly and parallel to the movement direction of the upper die assembly relative to the lower die assembly, the punch is arranged in the unloading plate, the unloading plate can abut against the workpiece, and the unloading plate is kept apart from the upper die assembly under the action of gravity when the unloading plate is not abutted against the workpiece; the lower die assembly is provided with a bottom hook seat, the unloading plate is provided with a pull hook assembly which can be fixed to the bottom hook seat, and the upper die assembly is provided with a fork which is used for matching the pull hook assembly; when the unloading plate is abutted against the workpiece and the punch is arranged in the die hole, the fork fixes the pull hook assembly to the bottom hook seat; when the unloading plate is not abutted against the workpiece, the fork makes the pull hook assembly disengage from the bottom hook seat.

[0008] The die with the automatic unloading mechanism is characterized in that the upper die assembly is moved up and down relative to the lower die assembly to make the punch pass through the die hole and complete punching on the workpiece, the unloading plate is slidingly assembled to the upper die assembly and parallel to the movement direction of the upper die assembly relative to the lower die assembly, and the unloading plate is kept apart from the upper die assembly under the action of gravity when the unloading plate is not abutted against the workpiece, so that the unloading plate can move asynchronously with the upper die assembly during the rising process; the fork assembled to the upper die assembly can match the pull hook assembly, the fork fixes the pull hook assembly to the bottom hook seat during the process that the distance between the upper die assembly and the unloading plate is shortened when the unloading plate is abutted against the workpiece and the punch is arranged in the die hole, so that the unloading plate is locked to the lower die assembly, the unloading force generated by the punch and the workpiece is transmitted to the unloading plate when the punch is disengaged from the die hole, the unloading plate tightly presses the workpiece to the lower die assembly due to the locking of the unloading plate to the lower die assembly, the fork makes the pull hook assembly disengage from the bottom hook seat when the punch is completely disengaged from the die hole, the unloading assembly moves away from the workpiece along with the rising of the upper die assembly, and the unloading of the workpiece is completed; the unloading structure of the application is assembled to the original structure of the die, has good universality, forms regular unloading actions along with the up and down movement of the die, and is locked to the bottom hook seat synchronously with the die, so that the action does not interfere and has high stability, does not need additional driving source input and control, has the advantages of simple structure and low use cost, and effectively solves the technical problems of high use cost and difficult control of the unloading device in the prior art.

[0009] Further, the pull hook assembly comprises a fixed seat and a pull hook rotatably assembled on the fixed seat, and the fork is matched with the pull hook; when the stripper plate abuts against the workpiece and the punch is arranged in the concave die hole, the fork rotates the pull hook to hook the bottom hook seat; when the stripper plate does not abut against the workpiece, the fork rotates the pull hook to unhook the bottom hook seat. The fork is matched with the pull hook to control the rotation of the pull hook. When the stripper plate abuts against the workpiece and the punch is arranged in the concave die hole, the distance between the upper die assembly and the stripper plate is shortened, the pull hook is close to the bottom hook seat, the fork rotates the pull hook to hook the bottom hook seat, and the stripper plate is locked with the lower die assembly. When the punch is completely separated from the concave die hole, the fork rotates the pull hook to unhook the bottom hook seat, the stripper plate is unlocked with the lower die assembly, the stripper plate is separated from the lower die assembly, and the stripper plate is separated from the workpiece with the rising of the upper die assembly, thereby completing the stripping of the workpiece. The structure is simple and stable.

[0010] Further, the pull hook is provided with a rotating pin, the fork comprises a fixed part, a locking part and an opening and closing part connected in sequence, the fixed part is assembled on the upper die assembly, the rotating pin can abut against the side surface of the locking part and the opening and closing part, and the rotating pin can slide between the locking part and the opening and closing part, and the side surface of the opening and closing part is provided with a protrusion; when the rotating pin slides to the side surface of the locking part, the acting force between them is zero, the pull hook rotates to hook the bottom hook seat under the action of its own gravity; when the rotating pin slides to the side surface of the opening and closing part, the rotating pin is subjected to the action of the protrusion, and the pull hook rotates to unhook the bottom hook seat under the action of the rotating pin. The rotating pin is slidably arranged and can abut against the locking part and the opening and closing part. Due to the different acting forces and directions of the acting forces of the locking part and the opening and closing part on the rotating pin, the rotating pin is slid on the locking part and the opening and closing part, thereby controlling the rotation of the pull hook. The structure is simple, easy to install and stable.

[0011] Further, the locking part and the opening and closing part are provided with a buffer part, the rotating pin can slide and abut against the side surface of the buffer part, and the acting force between the pull hook and the bottom hook seat is zero when the rotating pin slides to the side surface of the buffer part. The buffer part is arranged between the locking part and the opening and closing part. When the rotating pin slides to the buffer part, the acting force between the pull hook and the bottom hook seat is zero, thereby avoiding the wear of the pull hook when the pull hook unhooks the bottom hook seat due to the bearing of the stripping force, protecting the mold and prolonging the service life of the mold.

[0012] Further, the pull hook and the fixed seat are provided with a first elastic part, and the pull hook rotates to hook the bottom hook seat under the action of the first elastic part. The pull hook rotates to hook the bottom hook seat under the action of the first elastic part, thereby ensuring the stability of the action of the pull hook hooking the bottom hook seat.

[0013] Further, the bottom hook seat is provided with a fixing hole, the draw hook comprises a rotating table rotatably assembled to the draw hook assembly, and a fixing table connected to the rotating table, and the fixing table can be penetrated into the fixing hole. The penetration of the fixing table into the fixing hole forms locking, and has the advantages of simple structure and stable practicability.

[0014] Further, the draw hook is symmetrically provided with two groups, the fixing hole penetrates through the bottom hook seat, and the two groups of fixing tables are respectively penetrated from two ends of the fixing hole. The draw hook is symmetrically provided with two groups, so the fixing tables are also symmetrically provided with two groups, the fixing hole penetrates through the bottom hook seat, the two groups of symmetrically provided fixing tables are respectively penetrated from two ends of the fixing hole, and locking between the draw hook and the bottom hook seat is more stable.

[0015] Further, a second elastic component is arranged between the upper die assembly and the ejection plate. The second elastic component is arranged between the upper die assembly and the ejection plate, the ejection plate is subjected to the gravity and the elastic force of the second elastic component, and the ejection plate can exert greater pressing force on the workpiece when abutting against the workpiece.

[0016] Further, the upper die assembly is provided with a guide column, the lower die assembly is provided with a guide sleeve capable of slidingly cooperating with the guide column, the guide column is arranged in the ejection plate, and the distance from the lower end of the guide sleeve to the lower die assembly is less than the distance from the lower end of the punch to the lower die assembly. The guide column of the upper die assembly cooperates with the guide sleeve of the lower die assembly, and the distance from the lower end of the guide sleeve to the lower die assembly is less than the distance from the lower end of the punch to the lower die assembly, so that the cooperation of the guide column and the guide sleeve plays a guiding protection role before the punch cooperates with the concave die hole.

[0017] Further, the ejection plate is provided with an equal-height sleeve, the upper die assembly comprises an upper die seat and an upper fixed plate which are arranged in close contact from top to bottom, the upper die seat is provided with a sliding groove, the equal-height sleeve is slidingly assembled in the sliding groove, and the equal-height sleeve can abut against the upper end face of the upper fixed plate. The equal-height sleeve is slidingly assembled in the sliding groove to realize the relative sliding between the ejection plate and the upper die assembly, the equal-height sleeve can abut against the upper end face of the upper fixed plate to realize that the ejection plate is kept apart from the upper die assembly under the action of gravity, and the equal-height sleeve has the advantages of simple structure and stable operation.

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

[0019] The ejection structure of the present application is assembled in the original structure of the die, has good universality, forms regular ejection actions along with the up-down movement of the die, the locking of the draw hook and the bottom hook seat is synchronized with the die, the actions do not interfere with each other, the stability is high, no additional driving source input and control are needed, the structure is simple, the use cost is low, and the technical problems of high use cost and difficult control of the ejection device in the prior art are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Structure diagram of a mold with automatic unloading mechanism for example one;

[0021] Figure 2 Structure diagram of a mold with automatic unloading mechanism for example two;

[0022] Figure 3 Reference diagram for first use state of unloading mechanism;

[0023] Figure 4 Reference diagram for second use state of unloading mechanism;

[0024] Figure 5 Structure diagram of a fork frame;

[0025] Figure 6 Structure diagram of a pull hook;

[0026] Figure 7 Structure diagram of a bottom hook seat.

[0027] In the drawings: 100, upper mold assembly; 110, punch; 120, guide column; 130, upper mold seat; 131, sliding groove; 140, upper fixed plate; 200, lower mold assembly; 210, die hole; 220, guide sleeve; 300, unloading plate; 310, equal-height sleeve; 400, bottom hook seat; 410, fixed hole; 500, pull hook assembly; 510, pull hook; 511, rotating table; 512, fixed table; 520, rotating pin; 530, fixed seat; 540, first elastic component; 600, fork frame; 610, fixed part; 620, locking part; 630, opening and closing part; 640, buffer part; 700, second elastic component. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with specific embodiments. The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the patent; in order to better illustrate the embodiments of the application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it can be understood that some well-known structures in the drawings and their descriptions can be omitted.

[0029] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0030] Embodiment one

[0031] As Figures 1 to 2 shown is a first embodiment of a mold with an automatic unloading mechanism.

[0032] The mold with automatic unloading mechanism comprises an upper die assembly 100 provided with a punch 110, a lower die assembly 200 provided with a die hole 210, and a stripper plate 300 arranged between the upper die assembly 100 and the lower die assembly 200. The punch 110 is arranged corresponding to the die hole 210 and punches the workpiece arranged on the lower die assembly 200 due to the relative movement between the upper die assembly 100 and the lower die assembly 200. The stripper plate 300 is slidingly assembled to the upper die assembly 100 and parallel to the movement direction of the upper die assembly 100 relative to the lower die assembly 200. The punch 110 is arranged in the stripper plate 300. The stripper plate 300 can abut the workpiece from above. When the stripper plate 300 is not in abutment with the workpiece, the stripper plate 300 is kept apart from the upper die assembly 100 under the action of its own gravity. The lower die assembly 200 is assembled with a bottom hook base 400. The stripper plate 300 is assembled with a pull hook assembly 500 which can be fixed with the bottom hook base 400. The upper die assembly 100 is assembled with a fork 600 for cooperating with the pull hook assembly 500. When the stripper plate 300 is in abutment with the workpiece and the punch 110 is arranged in the die hole 210, the fork 600 fixes the pull hook assembly 500 with the bottom hook base 400. When the stripper plate 300 is not in abutment with the workpiece, the fork 600 makes the pull hook assembly 500 disengage from the bottom hook base 400. A second elastic component 700 is arranged between the upper die assembly 100 and the stripper plate 300. The upper die assembly 100 is provided with a guide column 120. The lower die assembly 200 is provided with a guide sleeve 220 which can slidingly cooperate with the guide column 120. The guide column 120 is arranged in the stripper plate 300. The distance from the lower end of the guide sleeve 220 to the lower die assembly 200 is less than the distance from the lower end of the punch 110 to the lower die assembly 200. The stripper plate 300 is provided with an equal-height sleeve 310. The upper die assembly 100 comprises an upper die base 130 and an upper fixed plate 140 which are arranged in abutment from top to bottom. The upper die base 130 is provided with a sliding groove 131. The equal-height sleeve 310 is slidingly assembled in the sliding groove 131 and can abut the upper end surface of the upper fixed plate 140.

[0033] In the embodiment, as Figures 1 to 2As shown, the up-down movement of the upper die assembly 100 relative to the lower die assembly 200 realizes the punching of the punch 110 through the die hole 210 to complete the punching processing of the workpiece, the stripper plate 300 arranged between the upper die assembly 100 and the lower die assembly 200 is slidingly assembled to the upper die assembly 100 and parallel to the movement direction of the upper die assembly 100 relative to the lower die assembly 200, and is arranged to keep a distance from the upper die assembly 100 under the action of its own gravity when the stripper plate 300 does not abut against the workpiece, so that the stripper plate 300 can move out of synchronization with the upper die assembly 100 in the rising process; the fork frame 600 assembled to the upper die assembly 100 can cooperate with the pull hook component, when the stripper plate 300 abuts above the workpiece and the punch 110 is arranged in the die hole 210, the fork frame 600 fixes the pull hook component with the bottom hook seat 400 in the process that the distance between the upper die assembly 100 and the stripper plate 300 is shortened, so as to lock the stripper plate 300 with the lower die assembly 200, when the punch 110 is separated from the die hole 210, the stripper force generated by the punch 110 and the workpiece will be transmitted to the stripper plate 300 by the workpiece, since the stripper plate 300 is locked with the lower die assembly 200, the stripper plate 300 will tightly press the workpiece on the lower die assembly 200 until the punch 110 completely separates from the die hole 210, the fork frame 600 makes the pull hook component separate from the fixation with the bottom hook seat 400, and the stripper assembly also moves upward away from the workpiece along with the rising of the upper die assembly 100, to complete the stripping of the workpiece; the stripper structure of the present application is assembled to the original structure of the die, has good universality, forms regular stripping action along with the up-down movement of the die, the locking of the pull hook 510 and the bottom hook seat 400 is synchronized with the die, the action does not interfere, has high stability, does not need additional driving source input and control, has the advantages of simple structure and low use cost, and effectively solves the technical problems of high use cost and difficult control of the stripper device in the prior art.

[0034] In the embodiment, as shown in Figure 2 A second elastic component 700 is arranged between the upper die assembly 100 and the stripper plate 300, so that the stripper plate 300 is subjected to the action of its own gravity and the elastic force of the second elastic component 700, and can exert greater pressing force on the workpiece when abutting above the workpiece.

[0035] In addition, in the embodiment, the second elastic component 700 adopts a lightweight spring to press the workpiece to balance the stripper plate 300, and combines the stripper plate 300 to realize combined stripping.

[0036] In the embodiment, as shown in Figure 2As shown, the guide pillar 120 of the upper die assembly 100 is matched with the guide sleeve 220 of the lower die assembly 200, and the distance from the lower end of the guide sleeve 220 to the lower die assembly 200 is less than the distance from the lower end of the punch 110 to the lower die assembly 200, so that the matching of the guide pillar 120 and the guide sleeve 220 plays a guiding protection role before the matching of the punch 110 and the concave die hole 210.

[0037] In the embodiment, as shown in Figure 1 As shown, the equal-height sleeve 310 is slidingly assembled in the sliding groove 131 to realize the relative sliding between the ejection plate 300 and the upper die assembly 100, and the equal-height sleeve 310 is arranged to abut against the upper end face of the upper fixed plate 140 to realize that the ejection plate 300 is kept apart from the upper die assembly 100 under the action of its own gravity, which has the advantages of simple structure and stable operation.

[0038] Embodiment two

[0039] As shown in Figures 2 to 5 The second embodiment of the mold with the automatic ejection mechanism.

[0040] The embodiment is similar to the first embodiment, and the difference lies in that the pull hook assembly 500 comprises a fixed seat 530 and a pull hook 510 rotatably assembled in the fixed seat 530, and the fork frame 600 is matched with the pull hook 510; when the ejection plate 300 abuts against the workpiece and the punch 110 is arranged in the concave die hole 210, the fork frame 600 makes the pull hook 510 rotate to hook the bottom hook seat 400; when the ejection plate 300 does not abut against the workpiece, the fork frame 600 makes the pull hook 510 rotate to unhook the bottom hook seat 400. Wherein, the pull hook 510 is provided with a rotating pin 520, the fork frame 600 comprises a fixed part 610, a locking part 620 and an opening and closing part 630 connected in sequence, the fixed part 610 is assembled in the upper die assembly 100, the rotating pin 520 can abut against the side faces of the locking part 620 and the opening and closing part 630 and can slide between the locking part 620 and the opening and closing part 630, and the side face of the opening and closing part 630 is provided with a protrusion; when the rotating pin 520 slides to the side face of the locking part 620, the acting force between them is zero, and the pull hook 510 rotates to hook the bottom hook seat 400 under the action of its own gravity; when the rotating pin 520 slides to the side face of the opening and closing part 630, the pull hook 510 rotates to unhook the bottom hook seat 400 under the action of the rotating pin 520. Wherein, the buffering part 640 is arranged between the locking part 620 and the opening and closing part 630, the rotating pin 520 can slide and abut against the side face of the buffering part 640, and when the rotating pin 520 slides to the side face of the buffering part 640, the acting force between the pull hook 510 and the bottom hook seat 400 is zero. Wherein, the first elastic part 540 is arranged between the pull hook 510 and the fixed seat 530, and the pull hook 510 can rotate to hook the bottom hook seat 400 under the action of the first elastic part 540.

[0041] Further, in the embodiment, the pull hook assembly 500 can also be a gear rotatably assembled to the stripper plate 300, the gear has a hook outside connected to the hook seat 400, the fork 600 is provided with a rack engaged with the gear, the relative movement of the fork 600 and the pull hook assembly 500 drives the rack to rotate the gear, so that the hook rotates regularly following the movement of the fork 600, meeting the position matching requirements in different stages of unloading.

[0042] In the embodiment, as shown in Figure 2 , the fork 600 is arranged to cooperate with the pull hook 510 to control the rotation of the pull hook 510. When the stripper plate 300 abuts above the workpiece and the punch 110 is arranged in the die hole 210, the distance between the upper die assembly 100 and the stripper plate 300 is shortened, the pull hook 510 is close to the hook seat 400, and the fork 600 drives the pull hook 510 to rotate to hook the hook seat 400, so that the stripper plate 300 is locked with the lower die assembly 200. When the punch 110 completely leaves the die hole 210, the fork 600 drives the pull hook 510 to rotate to the position of unhooking the hook seat 400, so that the stripper plate 300 is unlocked with the lower die assembly 200, and the stripper plate 300 is lifted away from the workpiece with the upper die assembly 100, completing the unloading of the workpiece, having the advantages of simple structure and high stability.

[0043] In the embodiment, as shown in Figures 3 to 4 , the rotating pin 520 is arranged to be slidable and abutting to the locking portion 620 and the opening and closing portion 630. Since the locking portion 620 and the opening and closing portion 630 have different forces and directions of force acting on the rotating pin 520, the rotating pin 520 is slidable on the locking portion 620 and the opening and closing portion 630, thereby controlling the rotation of the pull hook 510, having the advantages of simple structure, easy installation and high stability.

[0044] In the embodiment, as shown in Figure 5 , a buffer portion 640 is arranged between the locking portion 620 and the opening and closing portion 630. When the rotating pin 520 slides to the buffer portion 640, the force between the pull hook 510 and the hook seat 400 is zero, so that the wear of the pull hook 510 when unhooking the hook seat 400 due to the unloading force can be avoided, thereby protecting the mold and prolonging the service life of the mold.

[0045] In the embodiment, as shown in Figure 3 , the pull hook 510 is arranged to rotate to hook the hook seat 400 under the action of the first elastic member 540, thereby ensuring the stability of the action of the pull hook 510 hooking the hook seat 400.

[0046] Embodiment Three

[0047] As shown in Figure 3 , Figure 6 and Figure 7It is a third embodiment of the mold with the automatic unloading mechanism.

[0048] The embodiment is similar to the embodiment one or the embodiment two, and the difference is that the bottom hook base 400 is provided with the fixing hole 410, the pull hook 510 comprises the rotating table 511 which is rotatably assembled on the pull hook assembly 500, and the fixing table 512 which is connected to the rotating table 511 and can be penetrated into the fixing hole 410. The pull hook 510 is symmetrically arranged in two groups, and the fixing hole 410 penetrates through the bottom hook base 400, and the two groups of fixing tables 512 are respectively penetrated into the two ends of the fixing hole 410.

[0049] In the embodiment, as shown in Figure 3 , the fixing table 512 is arranged to be penetrated into the fixing hole 410 to form the locking, and has the advantages of simple structure and stable practicability.

[0050] In the embodiment, as shown in Figure 3 , Figure 6 and Figure 7 , the pull hook 510 is symmetrically arranged in two groups, so the fixing table 512 is also symmetrically arranged in two groups, and the fixing hole 410 is arranged to penetrate through the bottom hook base 400, and the two groups of symmetrically arranged fixing tables 512 are respectively penetrated into the two ends of the fixing hole 410, so that the locking between the pull hook 510 and the bottom hook base 400 is more stable.

[0051] In addition, in the embodiment, the rotating table 511 and the fixing table 512 are integrally machined and heat treated to HRC 42-48, so as to ensure the wear resistance and the pulling strength, and the circular arc is arranged at the corner of the rotating table 511 and the fixing table 512 to avoid the sharp corner effect and the force impact to be pulled off.

[0052] In the specific contents of the above specific embodiments, any technical features can be combined arbitrarily without contradiction, and in order to make the description simple, all possible combinations of the above technical features are not described, however, as long as the combination of the technical features does not exist contradiction, it should be considered as the range disclosed in the specification.

[0053] Obviously, the above embodiments of the application are only examples for clearly illustrating the application, and are not intended to limit the implementation manner of the application. Any modification, equivalent replacement and improvement made on the basis of the above description for those skilled in the art should be included in the protection scope of the claims of the application.

Claims

1. A mold with an automatic unloading mechanism, comprising an upper mold assembly (100) having a punch (110) and a lower mold assembly (200) having a die cavity (210), wherein the punch (110) is disposed corresponding to the die cavity (210) and punches a workpiece placed on the lower mold assembly (200) due to the relative movement of the upper mold assembly (100) and the lower mold assembly (200), characterized in that: It also includes a stripper plate (300) disposed between the upper die assembly (100) and the lower die assembly (200). The stripper plate (300) is slidably mounted on the upper die assembly (100) and its movement direction relative to the upper die assembly (100) is parallel to the movement direction of the upper die assembly (100) relative to the lower die assembly (200). The punch (110) passes through the stripper plate (300). The stripper plate (300) can abut against the top of the workpiece. When the stripper plate (300) is not abutting against the workpiece, it maintains a distance from the upper die assembly (100) under its own gravity. The lower die assembly (200) is equipped with a bottom hook seat (400), the stripper plate (300) is equipped with a pull hook assembly (500) that can be fixed to the bottom hook seat (400), and the upper die assembly (100) is equipped with a fork (600) for cooperating with the pull hook assembly (500). When the stripper plate (300) abuts against the workpiece and the punch (110) passes through the die cavity (210), the fork (600) fixes the pull hook assembly (500) to the bottom hook seat (400). When the stripper plate (300) does not abut against the workpiece, the fork (600) disengages the pull hook assembly (500) from the bottom hook seat (400). The hook assembly (500) includes a fixed base (530) and a hook (510) rotatably mounted on the fixed base (530). The fork (600) can cooperate with the hook (510). When the stripper plate (300) abuts against the workpiece and the punch (110) passes through the die hole (210), the fork (600) causes the hook (510) to rotate to hook the bottom hook seat (400). When the stripper plate (300) does not abut against the workpiece, the fork (600) causes the hook (510) to rotate to disengage from the bottom hook seat (400). The hook (510) is provided with a rotating pin (520). The fork (600) includes a fixed part (610), a locking part (620), and an opening and closing part (630) connected in sequence. The fixed part (610) is assembled to the upper mold assembly (100). The rotating pin (520) can abut against the sides of the locking part (620) and the opening and closing part (630), and the rotating pin (520) can slide between the locking part (620) and the opening and closing part (630). The opening and closing part (630) has a protrusion on its side; when the rotating pin (520) slides to the side of the locking part (620), the force between the two is zero, and the hook (510) rotates under its own weight to hook the bottom hook seat (400); when the rotating pin (520) slides to the side of the opening and closing part (630), it is subjected to the force of the protrusion, and the hook (510) rotates under the force of the rotating pin (520) to disengage from the bottom hook seat (400).

2. The mold with an automatic unloading mechanism according to claim 1, characterized in that: A buffer portion (640) is provided between the locking portion (620) and the opening and closing portion (630). The rotating pin (520) is slidable and can abut against the side of the buffer portion (640). When the rotating pin (520) slides to the side of the buffer portion (640), the force between the hook (510) and the bottom hook seat (400) is zero.

3. A mold with an automatic unloading mechanism according to claim 1, characterized in that: A first elastic component (540) is provided between the hook (510) and the fixed base (530), and the hook (510) can rotate to hook the bottom hook base (400) under the force of the first elastic component (540).

4. A mold with an automatic unloading mechanism according to claim 1, characterized in that: The bottom hook base (400) is provided with a fixing hole (410). The hook (510) includes a rotating platform (511) rotatably mounted on the hook assembly (500) and a fixing platform (512) connected to the rotating platform (511). The fixing platform (512) can pass through the fixing hole (410).

5. A mold with an automatic unloading mechanism according to claim 4, characterized in that: The hooks (510) are arranged in two symmetrical sets. The fixing holes (410) penetrate the bottom hook base (400). The two sets of fixing platforms (512) are respectively inserted through the two ends of the fixing holes (410).

6. A mold with an automatic unloading mechanism according to claim 1, characterized in that: A second elastic component (700) is provided between the upper mold assembly (100) and the unloading plate (300).

7. A mold with an automatic unloading mechanism according to claim 1, characterized in that: The upper die assembly (100) is provided with a guide post (120), and the lower die assembly (200) is provided with a guide sleeve (220) that can slide with the guide post (120). The guide post (120) passes through the unloading plate (300), and the distance from the lower end of the guide sleeve (220) to the lower die assembly (200) is less than the distance from the lower end of the punch (110) to the lower die assembly (200).

8. A mold with an automatic unloading mechanism according to claim 1, characterized in that: The unloading plate (300) is provided with an equal height sleeve (310). The upper mold assembly (100) includes an upper mold base (130) and an upper fixing plate (140) that are fitted together from top to bottom. The upper mold base (130) is provided with a sliding groove (131). The equal height sleeve (310) is slidably assembled in the sliding groove (131) and the equal height sleeve (310) can abut against the upper end face of the upper fixing plate (140).

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