Die changing system

Abstract

The invention discloses a die changing system, which relates to the technical field of material transfer and comprises a die transfer table, a limiting structure and a die changing trolley, the mold transfer table is provided with a transfer area; the limiting structure is movably connected to the rear side of the mold transfer table in the vertical direction. The limiting structure is used for stopping the target mold in the transfer area from moving backwards when located at the first node; the mold changing trolley is provided with a containing area, a wedge-shaped actuating block is arranged on the front side of the mold changing trolley, and the wedge-shaped actuating block abuts against the limiting structure along with forward movement of the mold changing trolley so as to drive the limiting structure to move downwards to the second node, and therefore a transfer channel allowing the target mold to pass through is formed between the transfer area and the containing area. According to the scheme, the mold transfer table is additionally arranged to achieve transfer of the target mold, the target mold does not need to be directly transferred from one station to another station, meanwhile, the transfer rate of the target mold between the mold changing trolley and the mold transfer table is increased, and therefore the waiting time can be shortened, and the overall production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material transfer, and in particular to a mold changing system. Background Art

[0002] In modern industrial production, molds are often used for the molding and processing of various products. These molds usually need to be transferred between different workstations to complete the entire processing and production process. The transfer of molds is a key link to ensure the continuous operation of the production line, and its efficiency directly affects the overall production efficiency and cost.

[0003] At present, the transfer of molds mainly relies on traditional handling equipment such as forklifts. Forklifts can directly transfer molds from one station to another. Although this transfer method meets production needs to a certain extent, it is often difficult to coordinate the production rhythm differences between different stations. For example, after the operator at the first station transfers the used mold to the second station by forklift, the operator at the second station cannot use the mold directly because the operator at the second station has not finished the previous work. Therefore, the operator at the first station needs to wait for the operator at the second station to take over the mold before returning to the first station to work. This will lead to discontinuity in the production process, increase unnecessary waiting time, and reduce production efficiency. Summary of the invention

[0004] The main purpose of the present invention is to propose a mold changing system, which aims to solve the technical problem that the current method of directly transferring molds by forklift is difficult to coordinate the production rhythm differences between different workstations, thereby causing discontinuous production processes and reduced production efficiency.

[0005] To achieve the above object, the mold changing system proposed in the present invention comprises: A mold transfer table, wherein the mold transfer table has a transfer area, and the transfer area is used to place the target mold; a limit stopper is provided on the front side of the mold transfer table, and the limit stopper is used to prevent the target mold in the transfer area from moving forward; A limiting structure, wherein the limiting structure is movably connected to the rear side of the mold transfer table in the up-down direction; when the limiting structure is at a first node, the limiting structure is used to prevent the target mold in the transfer area from moving backward; A mold changing trolley, the mold changing trolley having a accommodating area, a wedge-shaped actuating block is arranged on the front side of the mold changing trolley, the wedge-shaped actuating block has an inclined actuating surface, and the inclined actuating surface is arranged to be inclined upward in a direction close to the mold turntable; the inclined actuating surface is used to abut against the limiting structure as the mold changing trolley moves forward, so as to drive the limiting structure to move downward to the second node, thereby forming a transfer channel between the transfer area and the accommodating area for the target mold to pass through.

[0006] In one embodiment, a guide through hole is provided on the rear side of the mold turntable and passes through in the up-down direction; the limiting structure comprises a blocking rod, a guide rod, an actuating rod and a limiting elastic member, the actuating rod extends in the left-right direction, the guide rod is connected to both ends of the actuating rod, and the guide rod is slidably fitted in the guide through hole; the blocking rod is connected to the middle part of the actuating rod; one end of the limiting elastic member is connected to the actuating rod, and the other end of the limiting elastic member is connected to the rear side of the mold turntable; The limiting elastic member is used to keep the baffle rod at the first node through elastic force, so as to block the target mold in the transfer area from moving backward through the baffle rod; the inclined actuating surface is used to abut against the actuating rod as the mold changing trolley moves forward, so as to drive the baffle rod to overcome the elastic force of the limiting elastic member and move downward to the second node.

[0007] In one embodiment, the mold changing trolley includes a trolley body, a lifting slide and a lifting drive assembly, the lifting drive assembly is arranged on the trolley body, the lifting slide is connected to the lifting drive assembly, and the upper side surface of the lifting slide constitutes the accommodating area; the lifting drive assembly is used to drive the lifting slide to move upward or downward so that the accommodating area and the transfer area are within a preset height difference range in the up and down directions.

[0008] In one embodiment, the lifting slide is a horizontally arranged polygonal structure; the lifting drive assembly includes a lifting drive device, a plurality of transmission rods, a plurality of transmission gears and a plurality of transmission racks, the plurality of transmission racks are connected one by one to each corner position of the lifting slide, each of the transmission racks is provided with at least two meshing tooth portions extending in the up-down direction, a transmission rod is provided between each group of two adjacent transmission racks, and both ends of each transmission rod are respectively connected to a transmission gear, and each of the transmission gears is meshed one by one with a meshing tooth portion of the corresponding transmission rack; The lifting drive device is used to drive at least one of the transmission rods to rotate, so as to simultaneously drive multiple transmission racks to move in the up and down directions through the meshing transmission between the transmission gear and the meshing tooth portion, thereby driving the lifting slide to move upward or downward.

[0009] In one embodiment, a plurality of first rollers arranged in the front-to-back direction are disposed on the upper side of the lifting slide, a rotation center axis of the first rollers extends in the left-to-right direction, and the bottom of the target mold rolls on the plurality of first rollers.

[0010] In one embodiment, a plurality of second rollers arranged in the front-to-back direction are provided on the lifting slide, the rotation center axis of the second rollers extends in the up-down direction, and the vertical side walls of the target mold are rollingly matched with the plurality of second rollers.

[0011] In one embodiment, the mold-changing trolley further includes an in-position sensing device, a limit drive device, and a U-shaped limit rod; the in-position sensing device is electrically connected to the limit drive device, the limit drive device is connected to the U-shaped limit rod, the U-shaped limit rod has a first rod segment, a second rod segment, and a third rod segment arranged in sequence from front to back, the first rod segment is located in front of the accommodating area, the third rod segment is located behind the accommodating area, the second rod segment is rotatably connected to the lifting slide around a second axis, and the second axis extends in the front-to-back direction; When the in-place sensing device detects that the target mold enters the accommodating area, the in-place sensing device is used to send a limit signal to the limit driving device; the limit driving device is used to drive the U-shaped limit rod to rotate around the second axis after receiving the limit signal, so that the target mold is clamped in the opening of the U-shaped limit rod.

[0012] In one embodiment, a plurality of third rollers arranged in the front-to-back direction are disposed on the upper side of the mold turntable, the rotation center axis of the third rollers extends in the left-right direction, and the bottom of the target mold rolls on the plurality of third rollers.

[0013] In one embodiment, a plurality of fourth rollers arranged in the front-to-back direction are provided on the mold turntable, the rotation center axis of the fourth rollers extends in the up-down direction, and the vertical side walls of the target mold roll in cooperation with the plurality of fourth rollers.

[0014] In one embodiment, the mold changing system further comprises an actuating frame, a first elastic plunger and a second elastic plunger; the middle portion of the actuating frame is hinged to the mold transfer table around a first axis, the first axis extends in the left-right direction, and a plurality of the third rollers are arranged on the upper side of the actuating frame; the first elastic plunger is arranged below the front side of the actuating frame, the second elastic plunger is arranged below the rear side of the actuating frame, the first elastic plunger is in a compressed state, the second elastic plunger is in an extended state and abuts against the rear side of the actuating frame, so that the rear side of the actuating frame is higher than the front side of the actuating frame; The limiting structure is transmission-connected with the first elastic plunger; when the limiting structure moves downward to the second node driven by the mold-changing trolley, the limiting structure is used to trigger the first elastic plunger to pop up upward under the elastic force, so as to push the actuating frame to rotate through the first elastic plunger, thereby making the front side of the actuating frame higher than the rear side of the actuating frame.

[0015] In one embodiment, the mold changing system also includes a guide slide rail, which is fixed on the mold turntable, and the width of the guide channel of the guide slide rail in the left and right direction gradually decreases from back to front; a guide roller is provided on the mold changing trolley, and the rotation center axis of the guide roller extends in the up and down direction, and the guide roller rolls in the guide channel.

[0016] In one embodiment, the mold changing system also includes a positioning lock, which is fixed on the mold transfer table, and a positioning lock body is provided on the mold changing trolley; when the limiting structure moves downward to the second node driven by the mold changing trolley, the positioning lock body is buckled onto the positioning lock.

[0017] In one embodiment, the positioning lock comprises a transition slide, the transition slide has an inclined transition surface and a positioning groove, the inclined transition surface is inclined upward in a direction from back to front, and the positioning groove is located at the highest point of the inclined transition surface; The positioning lock body includes an elastic locking pin, which moves in the up and down directions under the elastic force; during the forward movement of the mold changing trolley, the elastic locking pin slides and fits on the inclined transition surface; when the limiting structure moves downward to the second node driven by the mold changing trolley, the elastic locking pin snaps into the positioning groove.

[0018] The technical solution of the present invention replaces the forklift with a mold changing trolley that is easier to operate to transfer the target mold, and adds a mold transfer table to realize the transfer of the target mold, without the need to transfer the target mold directly from one workstation to another; in the process of the mold changing trolley moving forward and approaching the mold transfer table, the wedge-shaped actuator block on the mold changing trolley can use its inclined actuator surface to synchronously drive the limiting structure on the mold transfer table to make way, so that the target mold can be transferred between the mold changing trolley and the mold transfer table at the same time as the mold changing trolley and the mold transfer table are connected, without the need to additionally drive the limiting structure to perform the making way operation, thereby speeding up the transfer rate of the target mold between the mold changing trolley and the mold transfer table; based on the above improvements, the waiting time during the transfer of the target mold can be minimized, thereby speeding up the overall production rhythm and improving the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of a mold changing system provided by the present invention; Figure 2 A schematic diagram of the structure of a turntable in a mold in an embodiment of a mold changing system provided by the present invention; Figure 3 A schematic structural diagram of a mold changing trolley in an embodiment of a mold changing system provided by the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 A schematic structural diagram of a turntable in a mold in another embodiment of a mold changing system provided by the present invention; Figure 6 This is a schematic structural diagram of a positioning lock in an embodiment of a mold changing system provided by the present invention.

[0021] Description of Figure Numbers: 1000, target mold; 1. Mold turntable; 101. Limit stopper; 102. Linear bearing; 2. Limiting structure; 201. Stop rod; 202. Guide rod; 203. Actuating rod; 204. Limiting elastic member; 3. Die-changing trolley; 301. Wedge-shaped actuating block; 302. Trolley body; 303. Lifting slide; 304. Lifting drive assembly; 305. U-shaped limit rod; 3011. Inclined actuating surface; 3041. Lifting drive device; 3042. Transmission rod; 3043. Transmission gear; 3044. Transmission rack; 3051. First rod segment; 3052. Second rod segment; 3053. Third rod segment; 30441. Meshing tooth portion; 4. First roller; 5. Second roller; 6. Third roller; 7. Fourth roller; 8. Actuating stand; 9. First elastic plunger; 10. Second elastic plunger; 11. Guide rail; 12. Guide roller; 13. Positioning lock; 1301. Transition slide; 13011. Inclined transition surface; 13012. Positioning groove; 14. Positioning lock body; 1401. Elastic lock pin; 15. Traction mechanism.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] At present, the transfer of molds mainly relies on traditional handling equipment such as forklifts. Forklifts can directly transfer molds from one station to another. Although this transfer method meets production needs to a certain extent, it is often difficult to coordinate the production rhythm differences between different stations. For example, after the operator at the first station transfers the used mold to the second station by forklift, the operator at the second station cannot use the mold directly because the operator at the second station has not finished the previous work. Therefore, the operator at the first station needs to wait for the operator at the second station to take over the mold before returning to the first station to work. This will lead to discontinuity in the production process, increase unnecessary waiting time, and reduce production efficiency.

[0027] In order to solve the above problems, an embodiment of the present invention provides a mold changing system, which uses a trolley that is easier to operate to replace a forklift to transfer the mold, and adds a transfer table to realize the transfer of the mold. There is no need to transfer the mold directly from one workstation to another. At the same time, the transfer rate of the mold between the trolley and the transfer table is accelerated, thereby minimizing waiting time and improving overall production efficiency.

[0028] See also Figures 1 to 3 , the mold changing system provided by the embodiment of the present invention includes: The mold transfer table 1 has a transfer area, and the transfer area is used to place the target mold 1000; a limit stopper 101 is provided on the front side of the mold transfer table 1, and the limit stopper 101 is used to prevent the target mold 1000 in the transfer area from moving forward; The limiting structure 2 is movably connected to the rear side of the mold transfer table 1 in the up-down direction; when the limiting structure 2 is at the first node, the limiting structure 2 is used to prevent the target mold 1000 in the transfer area from moving backward; The mold changing trolley 3 has a accommodating area. A wedge-shaped actuating block 301 is arranged on the front side of the mold changing trolley 3. The wedge-shaped actuating block 301 has an inclined actuating surface 3011. The inclined actuating surface 3011 is arranged to be inclined upward in a direction close to the mold transfer table 1; the inclined actuating surface 3011 is used to abut against the limiting structure 2 as the mold changing trolley 3 moves forward, so as to drive the limiting structure 2 to move downward to the second node, thereby forming a transfer channel between the transfer area and the accommodating area for the target mold 1000 to pass through.

[0029] In this embodiment, the middle part of the mold turntable 1 is the transfer area, and corresponding blocking structures can be set on the left and right sides of the transfer area; when the target mold 1000 is placed in the transfer area, the above-mentioned blocking structure can limit the target mold 1000 from moving in the left and right directions, and the limit block 101 on the front side of the mold turntable 1 can limit the target mold 1000 from moving forward. The limiting structure 2 at the first node on the rear side of the mold turntable 1 can block the target mold 1000 to limit the target mold 1000 from moving backward. In this way, the target mold 1000 is limited in the horizontal direction, which can prevent the target mold 1000 from sliding out of the mold turntable 1.

[0030] In the process of the mold changing trolley 3 moving forward and approaching the mold transfer table 1, when the inclined actuating surface 3011 of the wedge-shaped actuating block 301 contacts the limiting structure 2, the mold changing trolley 3 continues to move forward. Since the inclined actuating surface 3011 has both forward and backward components and up and down components, the inclined actuating surface 3011 will apply a downward component of force to the limiting structure 2 while moving forward with the mold changing trolley 3, thereby driving the limiting structure 2 to move downward; when the limiting structure 2 moves downward to the second node, the rear side of the transfer area will be connected with the front side of the accommodating area to form a transfer channel, and at the same time, the highest point of the limiting structure 2 will be flush with or lower than the transfer area and the accommodating area, that is, the limiting structure 2 will no longer block the transfer area and the accommodating area. At this time, the target mold 1000 can be transferred from the transfer area to the accommodating area along the transfer channel, or from the accommodating area to the transfer area along the transfer channel.

[0031] Based on the above arrangement, in actual application, the operator at the first station can transfer the used target mold 1000 to the mold transfer table 1 via the mold changing trolley 3. When the mold changing trolley 3 moves forward and approaches the mold transfer table 1, the inclined actuating surface 3011 of the wedge-shaped actuating block 301 will drive the limiting structure 2 on the rear side of the mold transfer table 1 to move down from the first node to the second node as the mold changing trolley 3 moves, thereby making way for the limiting structure 2, so that the target mold 1000 on the mold changing trolley 3 can be transferred from the accommodating area to the transfer area of ​​the mold transfer table 1 without obstruction, and then the limiting structure 2 can be reset upward to the first node to limit the target mold 1000 in the transfer area. After completing the above operation, the operator at the first station can return to Return to the first workstation to work without waiting; the operator of the subsequent second workstation can push the empty mold changing trolley 3 to the mold transfer table 1. In the process of the mold changing trolley 3 moving forward and approaching the mold transfer table 1, the inclined actuating surface 3011 of the wedge-shaped actuating block 301 will drive the limiting structure 2 on the rear side of the mold transfer table 1 from the first node to the second node as the mold changing trolley 3 moves, so as to make way for the limiting structure 2, so that the target mold 1000 on the mold transfer table 1 can be transferred from the transfer area to the accommodating area of ​​the mold changing trolley 3 without obstruction, and then the limiting structure 2 can be reset upward to the first node; after completing the above operation, the operator of the second workstation can push the mold changing trolley 3 carrying the target mold 1000 back to the second workstation for the corresponding process.

[0032] It can be seen that the mold changing system provided in this embodiment uses a mold changing trolley 3 that is easier to operate instead of a forklift to transfer the target mold 1000, and adds a mold transfer table 1 to realize the transfer of the target mold 1000, without the need to directly transfer the target mold 1000 from one workstation to another; in the process of the mold changing trolley 3 moving forward and approaching the mold transfer table 1, the wedge-shaped actuating block 301 on the mold changing trolley 3 can use its inclined actuating surface 3011 to synchronously drive the limiting structure 2 on the mold transfer table 1 to make way, so that the target mold 1000 can be transferred between the mold changing trolley 3 and the mold transfer table 1 at the same time as the mold changing trolley 3 and the mold transfer table 1 are docked, without the need to additionally drive the limiting structure 2 to perform the making way operation, thereby speeding up the transfer rate of the target mold 1000 between the mold changing trolley 3 and the mold transfer table 1; based on the above improvements, the waiting time during the transfer of the target mold 1000 can be minimized, thereby speeding up the overall production rhythm and improving the overall production efficiency.

[0033] In one embodiment, reference Figures 1 to 3 A guide through hole (not shown in the figure) is provided on the rear side of the mold turntable 1 and runs through in the up-down direction; the limiting structure 2 includes a blocking rod 201, a guide rod 202, an actuating rod 203 and a limiting elastic member 204; the actuating rod 203 extends in the left-right direction, the guide rod 202 is connected to both ends of the actuating rod 203, and the guide rod 202 is slidably fitted in the guide through hole; the blocking rod 201 is connected to the middle part of the actuating rod 203; one end of the limiting elastic member 204 is connected to the actuating rod 203, and the other end of the limiting elastic member 204 is connected to the rear side of the mold turntable 1; The limiting elastic member 204 is used to keep the baffle rod 201 at the first node through elastic force, so as to block the target mold 1000 in the transfer area from moving backward through the baffle rod 201; the inclined actuating surface 3011 is used to abut against the actuating rod 203 as the mold changing trolley 3 moves forward, so as to drive the baffle rod 201 to overcome the elastic force of the limiting elastic member 204 and move downward to the second node.

[0034] Specifically, two linear bearings 102 can be arranged at intervals along the left-right direction on the rear side of the mold turntable 1, and the guide through hole can refer to the bearing inner hole of the linear bearing 102; through the sliding cooperation between the two guide rods 202 and the two guide through holes, it can be ensured that the limiting structure 2 can move accurately along the up and down directions; a limiting clamping ring can be arranged on the guide rod 202, and through the abutment cooperation between the limiting clamping ring and the bearing seat of the linear bearing 102, a limiting effect can be formed on the limiting structure 2 in the up and down directions.

[0035] The limiting elastic member 204 can apply an upward elastic force to the actuating rod 203, so that the actuating rod 203 maintains an upward movement trend. In the absence of other external forces, the blocking rod 201 can always be blocked at the rear side of the transfer area (that is, maintained at the first node) to form a limiting effect on the target mold 1000 in the transfer area; when the wedge-shaped actuating block 301 drives the actuating rod 203 to overcome the elastic force and press down as the mold changing trolley 3 moves forward, the blocking rod 201 can move downward to the second node and no longer form a blocking effect on the rear side of the transfer area; when the target mold 1000 is transferred between the transfer area and the accommodating area, the wedge-shaped actuating block 301 moves backward as the mold changing trolley 3 separates from the actuating rod 203. At this time, the blocking rod 201 can be reset upward to the first node under the elastic force of the limiting elastic member 204 without the need to additionally drive the blocking rod 201 to reset. In addition, the linearly increasing elastic force applied to the actuating rod 203 by the limiting elastic member 204 can produce a gradually increasing obstruction to the forward movement of the wedge-shaped actuating block 301, thereby gradually slowing down the mold changing trolley 3 until it stops, thereby preventing the mold changing trolley 3 from directly colliding with the mold turntable 1 at a faster speed.

[0036] The actuating rod 203 extends in the left-right direction, and the length of the actuating rod 203 is greater than the width of the inclined actuating surface 3011 in the left-right direction, so that the inclined actuating surface 3011 can fully contact the actuating rod 203, so that the wedge-shaped actuating block 301 can stably drive the actuating rod 203 to overcome the elastic force of the limiting elastic member 204 and press downward.

[0037] In one embodiment, reference Figures 1 to 4 The mold changing trolley 3 includes a trolley body 302, a lifting slide 303 and a lifting drive assembly 304. The lifting drive assembly 304 is arranged on the trolley body 302, the lifting slide 303 is connected to the lifting drive assembly 304, and the upper side surface of the lifting slide 303 constitutes a accommodating area; the lifting drive assembly 304 is used to drive the lifting slide 303 to move upward or downward, so that the accommodating area and the transfer area are within a preset height difference range in the up and down directions.

[0038] By setting up the lifting slide 303, the height of the accommodating area can be conveniently adjusted so that the height of the accommodating area can be better matched with the height of the transfer area, thereby more smoothly completing the transfer of the target mold 1000 between the transfer area and the accommodating area, and can be suitable for more target molds 1000 of different height sizes, thereby broadening the scope of application.

[0039] In one embodiment, reference Figures 1 to 4, the lifting slide 303 is a horizontally arranged polygonal structure; the lifting drive assembly 304 includes a lifting drive device 3041, a plurality of transmission rods 3042, a plurality of transmission gears 3043 and a plurality of transmission racks 3044, the plurality of transmission racks 3044 are connected one by one to each corner position of the lifting slide 303, each transmission rack 3044 is provided with at least two meshing tooth portions 30441 extending in the up-down direction at intervals, a transmission rod 3042 is provided between each group of two adjacent transmission racks 3044, and both ends of each transmission rod 3042 are respectively connected to a transmission gear 3043, and each transmission gear 3043 is meshed one by one with a meshing tooth portion 30441 of the corresponding transmission rack 3044; The lifting drive device 3041 is used to drive at least one transmission rod 3042 to rotate, so as to simultaneously drive multiple transmission racks 3044 to move in the up and down directions through the meshing transmission between the transmission gear 3043 and the meshing tooth portion 30441, thereby driving the lifting slide 303 to move upward or downward.

[0040] Specifically, take the lifting slide 303 as a horizontally arranged rectangular structure as an example. Figure 3 and Figure 4As shown, the upper ends of the four transmission racks 3044 are connected to the upper left corner, lower left corner, upper right corner and lower right corner of the lifting slide 303 in a one-to-one correspondence. The transmission racks 3044 are quadrangular prism-shaped structures extending in the up-down direction. Each transmission rack 3044 has four vertical side faces facing forward, backward, left and right. The four vertical side faces of each transmission rack 3044 are provided with meshing tooth portions 30441 extending in the up-down direction. A transmission rod 3042 extending in the left-right direction is provided between the two transmission racks 3044 located in the upper left corner and the upper right corner. The transmission gears 3043 on both sides of the transmission rod 3042 are respectively engaged with the two transmission racks 3044. 044 meshes with the corresponding meshing tooth portions 30441 of the two transmission racks 3044; a transmission rod 3042 extending in the front-to-back direction is provided between the two transmission racks 3044 located at the upper left corner and the lower left corner, and the transmission gears 3043 on both sides of the transmission rod 3042 mesh with the corresponding meshing tooth portions 30441 of the two transmission racks 3044 respectively; a transmission rod 3042 extending in the front-to-back direction is provided between the two transmission racks 3044 located at the upper right corner and the lower right corner, and the transmission gears 3043 on both sides of the transmission rod 3042 mesh with the corresponding meshing tooth portions 30441 of the two transmission racks 3044 respectively; the two transmission racks 3044 located at the lower left corner and the lower right corner A transmission rod 3042 extending in the left-right direction is arranged between the racks 3044, and the transmission gears 3043 on both sides of the transmission rod 3042 are respectively meshed with the corresponding meshing tooth portions 30441 of the two transmission racks 3044; when the lifting drive device 3041 drives the transmission rod 3042 located on the rear side to rotate, it will drive the two transmission racks 3044 located at the lower left corner and the lower right corner to move up and down, and the up and down movement of the two transmission racks 3044 located at the lower left corner and the lower right corner will further drive the two transmission rods 3042 located on the left and the right side to rotate, and the rotation of the two transmission rods 3042 located on the left and the right side will further drive the transmission rods 3042 located on the left and the right side to rotate. The two transmission racks 3044 at the upper corner and the upper right corner move up and down, so that the four transmission racks 3044 can move up and down synchronously through the rotation of a transmission rod 3042, thereby ensuring that the four corner positions of the lifting slide 303 can move up and down stably at the same rate and amplitude, and avoiding the deflection problem caused by inconsistent lifting rates and amplitudes at various locations on the lifting slide 303, so that the lifting slide 303 can always maintain a horizontal state during the lifting process, thereby more accurately completing the docking between the accommodating area and the transfer area, ensuring that the target mold 1000 can be smoothly and stably transferred between the accommodating area and the transfer area.

[0041] When the lifting slide 303 is set to other polygonal structures, the arrangement and connection form of the transmission rod 3042, the transmission gear 3043 and the transmission rack 3044 can be set in the same way as the above description, and will not be repeated here.

[0042] Among them, the lifting drive device 3041 may include a motor and a matching reduction mechanism. The reduction mechanism may specifically adopt the worm gear reducer shown in the figure, which is not limited here.

[0043] In one embodiment, reference Figures 1 to 3 A plurality of first rollers 4 arranged in the front-to-back direction are disposed on the upper side of the lifting slide 303 , and the rotation center axis of the first rollers 4 extends in the left-to-right direction. The bottom of the target mold 1000 is rollingly fitted on the plurality of first rollers 4 .

[0044] By setting the first roller 4, the sliding fit between the target mold 1000 and the accommodating area can be converted into a rolling fit, which can reduce the friction resistance, so that the target mold 1000 can be transferred between the mold changing trolley 3 and the mold turntable 1 with less effort, avoiding the problem of jamming.

[0045] In one embodiment, reference Figures 1 to 3 A plurality of second rollers 5 arranged in the front-to-back direction are provided on the lifting slide 303 , and the rotation center axis of the second rollers 5 extends in the up-down direction, and the vertical side walls of the target mold 1000 are rollingly matched with the plurality of second rollers 5 .

[0046] Specifically, the second rollers 5 can be arranged in two rows, and the two rows of second rollers 5 are arranged on the left and right sides of the lifting slide 303 to respectively contact the left and right vertical side walls of the target mold 1000. By arranging the second rollers 5, the moving target mold 1000 can be guided and corrected in the left and right directions. At the same time, the rolling cooperation between the second rollers 5 and the left and right vertical side walls of the target mold 1000 can ensure that the target mold 1000 can move forward and backward smoothly, avoiding the problem of jamming caused by the left and right vertical side walls of the target mold 1000 contacting the lifting slide 303.

[0047] In one embodiment, reference Figures 1 to 3 The mold changing trolley 3 also includes an in-position sensing device (not shown in the figure), a limit driving device (not shown in the figure) and a U-shaped limit rod 305; the in-position sensing device is electrically connected to the limit driving device, and the limit driving device is connected to the U-shaped limit rod 305. The U-shaped limit rod 305 has a first rod segment 3051, a second rod segment 3052 and a third rod segment 3053 arranged in sequence from front to back, the first rod segment 3051 is located in front of the accommodating area, the third rod segment 3053 is located at the rear of the accommodating area, and the second rod segment 3052 is rotatably connected to the lifting slide 303 around a second axis, and the second axis extends along the front-to-back direction; When the in-position sensing device detects that the target mold 1000 enters the accommodating area, the in-position sensing device is used to send a limit signal to the limit driving device; the limit driving device is used to drive the U-shaped limit rod 305 to rotate around the second axis after receiving the limit signal, so that the target mold 1000 is clamped in the opening of the U-shaped limit rod 305.

[0048] Specifically, the U-shaped limit rod 305 can be set on the left and / or right side of the accommodating area; when the target mold 1000 does not enter the accommodating area, the opening of the U-shaped limit rod 305 is upward, and the first rod segment 3051 on the front side and the third rod segment 3053 on the rear side are both in a vertical state, and the first rod segment 3051 and the third rod segment 3053 do not form a block to the accommodating area in the front and rear directions. At this time, the target mold 1000 can be transferred backward from the transfer area to the accommodating area; when the in-position sensor device detects that the target mold 1000 enters the accommodating area, the in-position sensor device is triggered by outputting a limit signal. The limiting driving device drives the second rod segment 3052 to rotate 90°, so that the opening of the U-shaped limiting rod 305 faces the accommodating area. At this time, the first rod segment 3051 on the front side and the third rod segment 3053 on the rear side are both in a horizontal state. The first rod segment 3051 will form a blocking effect on the front side of the accommodating area, and the third rod segment 3053 will form a blocking effect on the rear side of the accommodating area. In this way, the first rod segment 3051 and the third rod segment 3053 will form a limiting effect on the target mold 1000 in the accommodating area in the front-to-back direction, which can prevent the target mold 1000 from falling off the mold changing trolley 3 during the subsequent transfer process. If the target mold 1000 needs to be transferred from the accommodating area to the transfer area later, it is only necessary to drive the second rod segment 3052 to rotate 90° in the opposite direction through the limiting driving device to make the opening of the U-shaped limiting rod 305 face upward again.

[0049] In this embodiment, the U-shaped limit rod 305 is automatically triggered to limit the target mold 1000 through the detection operation of the in-position sensor device, without the need for manual operation, thereby improving the automation and intelligence of the mold change system. Among them, the in-position sensor device can be a proximity switch, a photoelectric sensor, a magnetic position sensor based on the Hall effect, etc., which is not limited here.

[0050] In one embodiment, reference Figures 1 to 3 A plurality of third rollers 6 arranged in the front-to-back direction are disposed on the upper side of the mold turntable 1 , and the rotation center axis of the third rollers 6 extends in the left-to-right direction. The bottom of the target mold 1000 is rollingly fitted on the plurality of third rollers 6 .

[0051] By setting the third roller 6, the sliding fit between the target mold 1000 and the transfer area can be converted into a rolling fit, which can reduce the friction resistance, so that the transfer of the target mold 1000 between the mold changing trolley 3 and the mold transfer table 1 can be completed with more effort, avoiding the problem of jamming.

[0052] In one embodiment, reference Figures 1 to 3 A plurality of fourth rollers 7 arranged along the front-to-back direction are provided on the mold turntable 1 , and a rotation center axis of the fourth roller 7 extends along the up-down direction, and the vertical side walls of the target mold 1000 are rollingly matched with the plurality of fourth rollers 7 .

[0053] Specifically, the fourth roller 7 can be arranged in two rows, and the two rows of fourth rollers 7 are arranged on the left and right sides of the mold turntable 1 to respectively contact the left and right vertical side walls of the target mold 1000. By arranging the fourth roller 7, the moving target mold 1000 can be guided and corrected in the left and right directions. At the same time, the rolling cooperation between the fourth roller 7 and the left and right vertical side walls of the target mold 1000 can ensure that the target mold 1000 can move forward and backward smoothly, avoiding the problem of jamming caused by the left and right vertical side walls of the target mold 1000 contacting the side walls of the mold turntable 1.

[0054] In one embodiment, reference Figures 1 to 5 The mold changing system also includes an actuating stand 8, a first elastic plunger 9 and a second elastic plunger 10; the middle part of the actuating stand 8 is hinged on the mold turntable 1 around a first axis, the first axis extends in the left-right direction, and a plurality of third rollers 6 are arranged on the upper side of the actuating stand 8; the first elastic plunger 9 is arranged below the front side of the actuating stand 8, and the second elastic plunger 10 is arranged below the rear side of the actuating stand 8, the first elastic plunger 9 is in a compressed state, and the second elastic plunger 10 is in an extended state and abuts against the rear side of the actuating stand 8, so that the rear side of the actuating stand 8 is higher than the front side of the actuating stand 8; The limiting structure 2 is transmission-connected with the first elastic plunger 9; when the limiting structure 2 moves downward to the second node driven by the mold changing trolley 3, the limiting structure 2 is used to trigger the first elastic plunger 9 to pop up upward under the elastic force, so as to push the actuating stand 8 to rotate through the first elastic plunger 9, so that the front side of the actuating stand 8 is higher than the rear side of the actuating stand 8.

[0055] Specifically, the actuating platform 8 forms a seesaw structure that rotates around the middle.

[0056] like Figure 5 As shown, the first elastic plunger 9 can use a lockable elastic structure, and the plunger portion of the first elastic plunger 9 can overcome the elastic force of the elastic member under the action of an external force and be pressed down, and the plunger portion of the first elastic plunger 9 can be locked at the current height position after being pressed down to a certain extent, and even if the external force is removed, the plunger portion will not be reset to the initial height position, and the elastic member is in a compressed state at this time; the locking state can be released by triggering the corresponding switch, so that the elastic member releases the elastic potential energy and drives the plunger portion to pop up. Specifically, the elastic structure can refer to the structure of the spring knife in the prior art, and its principle will not be described in detail here.

[0057] The second elastic plunger 10 can be a common spring plunger. The plunger part of the second elastic plunger 10 can overcome the elastic force of the elastic member and be pressed down under the action of an external force. When the external force is removed, the plunger part can automatically return to the initial height position under the elastic force.

[0058] Based on the above arrangement, the first elastic plunger 9 on the front side is in a compressed state in the initial state, and the second elastic plunger 10 on the rear side is in an extended state in the initial state. The second elastic plunger 10 can push up the rear side of the actuating stand 8, so that the actuating stand 8 is in an inclined state with the front side low and the rear side high, which can ensure that the target mold 1000 on the actuating stand 8 will not slide backwards. In this way, when the mold changing trolley 3 moves forward and drives the limiting structure 2 to move downward, it can be avoided that the target mold 1000 moves backwards and gets stuck in the gap between the accommodating area and the transfer area when the limiting structure 2 has not completely moved down into place and the accommodating area has not yet completed docking with the transfer area. When the mold changing trolley 3 drives the limiting structure 2 to move down into place, the accommodating area also completes docking with the transfer area. At this time, the limiting structure 2 that has moved down into place will be transmitted through the corresponding transmission mechanism (for example, it can be adopted as Figure 5 The traction mechanism 15 shown in the figure (not limited here) triggers the switch on the first elastic plunger 9, so that the plunger part of the first elastic plunger 9 pops up upward under the elastic force, and pushes up the front side of the actuating stand 8, so that the actuating stand 8 is in an inclined state with the front side high and the rear side low. At this time, the target mold 1000 on the actuating stand 8 can move backward under the action of gravity and the rolling action of the third roller 6, that is, the target mold 1000 can automatically move backward and enter the accommodating area of ​​the mold changing trolley 3 after the accommodating area and the transfer area are connected. There is no need to additionally drive the target mold 1000 to enter the accommodating area, thereby further improving the transfer efficiency of the target mold 1000 and accelerating the production rhythm.

[0059] It is understandable that, when in the extended state, the height of the plunger portion of the first elastic plunger 9 should be higher than the height of the plunger portion of the second elastic plunger 10 , and the maximum elastic force provided by the first elastic plunger 9 should be greater than the maximum elastic force provided by the second elastic plunger 10 .

[0060] In one embodiment, reference Figures 1 to 6 The mold changing system also includes a guide rail 11, which is fixed on the mold turntable 1. The width of the guide channel of the guide rail 11 in the left and right directions gradually decreases from the back to the front. A guide roller 12 is provided on the mold changing trolley 3. The rotation center axis of the guide roller 12 extends in the up and down direction. The guide roller 12 rolls and fits in the guide channel.

[0061] Specifically, the guide rail 11 can be as follows Figure 1As shown, it is composed of two vertical brackets arranged on the left and right sides of the mold changing trolley 3, and the interval area between the two vertical brackets constitutes a guide channel. The vertical bracket on the left gradually moves toward the right during the extension from the back to the front, and the vertical bracket on the right gradually moves toward the left during the extension from the back to the front, so that the width of the guide channel in the left and right directions gradually decreases from the back to the front; a group of guide rollers 12 can be respectively arranged on the left and right sides of the mold changing trolley 3, the guide roller 12 on the left side is used for rolling cooperation with the vertical bracket on the left side, and the guide roller 12 on the right side is used for rolling cooperation with the vertical bracket on the right side, so that the mold changing trolley 3 can be guided to gradually move toward the middle position during the forward process through the rolling cooperation between the guide slide rail 11 and the guide roller 12, so as to realize the positioning and correction of the mold changing trolley 3 in the left and right directions, and improve the relative position accuracy of the mold changing trolley 3 and the mold transfer table 1 when docking.

[0062] In one embodiment, reference Figures 1 to 6 The mold changing system also includes a positioning lock buckle 13, which is fixed on the mold transfer table 1, and a positioning lock body 14 is provided on the mold changing trolley 3; when the limiting structure 2 moves downward to the second node driven by the mold changing trolley 3, the positioning lock body 14 is buckled on the positioning lock buckle 13.

[0063] Specifically, the positioning lock 13 can be directly fixed on the mold turntable 1 or indirectly fixed on the mold turntable 1. It is only necessary to ensure that the relative position between the positioning lock 13 and the fixed mold turntable 1 remains unchanged. For example, the positioning lock 13 can be locked to the floor. When the limiting structure 2 moves downward to the second node driven by the mold changing trolley 3, it means that the mold changing trolley 3 has moved forward to the position and completed the docking with the mold turntable 1. At this time, the positioning lock body 14 has also moved with the mold changing trolley 3 to the positioning lock 13 and completed the buckling with the positioning lock 13. In this way, the mold changing trolley 3 can be fixed at the current position to avoid the position displacement of the mold changing trolley 3 relative to the mold turntable 1 during the subsequent transfer of the target mold 1000, thereby ensuring the smooth transfer operation of the target mold 1000.

[0064] Among them, the buckling cooperation between the positioning lock body 14 and the positioning lock buckle 13 can refer to the existing door lock, vehicle door lock and other structures, and will not be described in detail here.

[0065] In one embodiment, reference Figures 1 to 6 The positioning lock buckle 13 includes a transition slide 1301, the transition slide 1301 has an inclined transition surface 13011 and a positioning groove 13012, the inclined transition surface 13011 is inclined upward in a direction from back to front, and the positioning groove 13012 is located at the highest point of the inclined transition surface 13011; The positioning lock body 14 includes an elastic locking pin 1401, which moves in the up and down directions under the elastic force; during the forward movement of the mold changing trolley 3, the elastic locking pin 1401 slides and fits on the inclined transition surface 13011; when the limiting structure 2 moves downward to the second node driven by the mold changing trolley 3, the elastic locking pin 1401 snaps into the positioning groove 13012.

[0066] In the process of the elastic locking pin 1401 sliding forward along the inclined transition surface 13011 of the transition slide 1301, the gradually rising inclined transition surface 13011 will drive the elastic locking pin 1401 to gradually retract upward, so that the forward movement of the mold changing trolley 3 can be resisted by the elastic force, so that the mold changing trolley 3 gradually slows down when approaching the end of the movement, so that the mold changing trolley 3 can smoothly complete the docking with the mold transfer table 1, and avoid the mold changing trolley 3 colliding with the mold transfer table 1 due to excessive speed; when the mold changing trolley 3 moves into place, the elastic locking pin 1401 also moves to the top of the positioning groove 13012, and the elastic locking pin 1401 can pop up downward under the elastic force and snap into the positioning groove 13012, so that the mold changing trolley 3 is locked, and the mold changing trolley 3 can be stably maintained in the current position.

[0067] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A mold changing system, characterized in that: The mold changing system comprises: A mold transfer table, wherein the mold transfer table has a transfer area, and the transfer area is used to place the target mold; a limit stopper is provided on the front side of the mold transfer table, and the limit stopper is used to prevent the target mold in the transfer area from moving forward; A limiting structure, wherein the limiting structure is movably connected to the rear side of the mold transfer table in the up-down direction; when the limiting structure is at a first node, the limiting structure is used to prevent the target mold in the transfer area from moving backward; A mold changing trolley, the mold changing trolley having a accommodating area, a wedge-shaped actuating block is arranged on the front side of the mold changing trolley, the wedge-shaped actuating block has an inclined actuating surface, and the inclined actuating surface is arranged to be inclined upward in a direction close to the mold turntable; the inclined actuating surface is used to abut against the limiting structure as the mold changing trolley moves forward, so as to drive the limiting structure to move downward to the second node, thereby forming a transfer channel between the transfer area and the accommodating area for the target mold to pass through.

2. The mold changing system according to claim 1, characterized in that: A guide through hole is provided on the rear side of the mold turntable, which passes through in the up-down direction; the limiting structure comprises a blocking rod, a guide rod, an actuating rod and a limiting elastic member, the actuating rod extends in the left-right direction, the guide rod is connected to both ends of the actuating rod, and the guide rod is slidably fitted in the guide through hole; the blocking rod is connected to the middle part of the actuating rod; one end of the limiting elastic member is connected to the actuating rod, and the other end of the limiting elastic member is connected to the rear side of the mold turntable; The limiting elastic member is used to keep the baffle rod at the first node through elastic force, so as to block the target mold in the transfer area from moving backward through the baffle rod; the inclined actuating surface is used to abut against the actuating rod as the mold changing trolley moves forward, so as to drive the baffle rod to overcome the elastic force of the limiting elastic member and move downward to the second node.

3. The mold changing system according to claim 1, characterized in that: The mold changing trolley includes a trolley body, a lifting slide and a lifting drive assembly, the lifting drive assembly is arranged on the trolley body, the lifting slide is connected to the lifting drive assembly, and the upper side surface of the lifting slide constitutes the accommodating area; the lifting drive assembly is used to drive the lifting slide to move upward or downward so that the accommodating area and the transfer area are within a preset height difference range in the up and down directions.

4. The mold changing system according to claim 3, characterized in that: The lifting slide is a horizontally arranged polygonal structure; the lifting drive assembly includes a lifting drive device, a plurality of transmission rods, a plurality of transmission gears and a plurality of transmission racks, the plurality of transmission racks are connected one by one to each corner position of the lifting slide, each of the transmission racks is provided with at least two meshing teeth extending in the up-down direction, a transmission rod is provided between each group of two adjacent transmission racks, and both ends of each transmission rod are respectively connected to a transmission gear, and each of the transmission gears is meshed one by one with a meshing tooth portion of the corresponding transmission rack; The lifting drive device is used to drive at least one of the transmission rods to rotate, so as to simultaneously drive multiple transmission racks to move in the up and down directions through the meshing transmission between the transmission gear and the meshing tooth portion, thereby driving the lifting slide to move upward or downward.

5. The mold changing system according to claim 3, characterized in that: The upper side of the lifting slide is provided with a plurality of first rollers arranged in the front-to-back direction, the rotation center axis of the first rollers extends in the left-to-right direction, and the bottom of the target mold is rollingly matched on the plurality of first rollers; And / or, the lifting slide is provided with a plurality of second rollers arranged in the front-to-back direction, the rotation center axis of the second rollers extends in the up-down direction, and the vertical side walls of the target mold are rollingly matched with the plurality of second rollers.

6. The mold changing system according to claim 3, characterized in that: The mold-changing trolley further includes an in-position sensing device, a limit drive device and a U-shaped limit rod; the in-position sensing device is electrically connected to the limit drive device, the limit drive device is connected to the U-shaped limit rod, the U-shaped limit rod has a first rod segment, a second rod segment and a third rod segment arranged in sequence from front to back, the first rod segment is located in front of the accommodating area, the third rod segment is located behind the accommodating area, the second rod segment is rotatably connected to the lifting slide around a second axis, and the second axis extends in the front-to-back direction; When the in-place sensing device detects that the target mold enters the accommodating area, the in-place sensing device is used to send a limit signal to the limit driving device; the limit driving device is used to drive the U-shaped limit rod to rotate around the second axis after receiving the limit signal, so that the target mold is clamped in the opening of the U-shaped limit rod.

7. The mold changing system according to claim 1, characterized in that: The upper side of the mold turntable is provided with a plurality of third rollers arranged in the front-to-back direction, the rotation center axis of the third rollers extends in the left-right direction, and the bottom of the target mold is rollingly matched on the plurality of third rollers; And / or, a plurality of fourth rollers arranged in the front-to-back direction are provided on the mold turntable, a rotation center axis of the fourth rollers extends in the up-down direction, and the vertical side walls of the target mold are rollingly matched with the plurality of fourth rollers.

8. The mold changing system according to claim 7, characterized in that: The mold changing system further comprises an actuating frame, a first elastic plunger and a second elastic plunger; the middle portion of the actuating frame is hinged to the mold transfer table around a first axis, the first axis extends in the left-right direction, and a plurality of the third rollers are arranged on the upper side of the actuating frame; the first elastic plunger is arranged below the front side of the actuating frame, and the second elastic plunger is arranged below the rear side of the actuating frame, the first elastic plunger is in a compressed state, and the second elastic plunger is in an extended state and abuts against the rear side of the actuating frame, so that the rear side of the actuating frame is higher than the front side of the actuating frame; The limiting structure is transmission-connected with the first elastic plunger; when the limiting structure moves downward to the second node driven by the mold-changing trolley, the limiting structure is used to trigger the first elastic plunger to pop up upward under the elastic force, so as to push the actuating frame to rotate through the first elastic plunger, thereby making the front side of the actuating frame higher than the rear side of the actuating frame.

9. The mold changing system according to claim 1, characterized in that: The mold changing system further comprises a guide rail, the guide rail being fixed on the mold transfer table, the guide channel of the guide rail gradually decreasing in width from back to front in the left-right direction; a guide roller is arranged on the mold changing trolley, the rotation center axis of the guide roller extends in the up-down direction, and the guide roller is rollingly fitted in the guide channel; And / or, the mold changing system also includes a positioning lock, which is fixed on the mold transfer table, and a positioning lock body is provided on the mold changing trolley; when the limiting structure moves downward to the second node driven by the mold changing trolley, the positioning lock body is buckled on the positioning lock.

10. The mold changing system according to claim 9, characterized in that: The positioning lock buckle comprises a transition slide, the transition slide has an inclined transition surface and a positioning groove, the inclined transition surface is arranged to be inclined upward in a direction from back to front, and the positioning groove is located at the highest point of the inclined transition surface; The positioning lock body includes an elastic locking pin, which moves in the up and down directions under the elastic force; during the forward movement of the mold changing trolley, the elastic locking pin slides and fits on the inclined transition surface; when the limiting structure moves downward to the second node driven by the mold changing trolley, the elastic locking pin snaps into the positioning groove.

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