An automatic mold changer box foaming jig and a method of using the same

Abstract

The application discloses an automatic mold changing box foaming clamp, which comprises a top frame, a lifting system and a bottom plate. The top frame comprises a horizontal rotating turnover plate, and two groups of baffle assemblies are arranged on the upper and lower surfaces of the turnover plate. The baffle assemblies enclose a placing space for placing a mold. The lifting system comprises at least one group of ball screw transmission groups. The input end of the ball screw transmission group is provided with a power source. A first nut seat is arranged on the ball screw transmission group in a matched mode, and the first nut seat can move linearly along the ball screw transmission group. The bottom plate for placing a component to be machined is arranged on the nut seat and moves up and down along with the nut seat. The structure can realize automatic mold changing. When production is carried out, the upper end can be prepared for the next mold. After the top frame is turned over, the mold can be put into use, and the mold changing time is greatly saved.

Description

Technical Field

[0001] This invention relates to the technical field of foaming processes, specifically to an automatic mold-changing foaming fixture and its usage method. Background Technology

[0002] The technology of plastic foaming has a long history. The earliest example is foam bakelite in the early 1920s, produced using methods similar to those used to manufacture foam rubber. Rigid polyurethane foam and polystyrene foam appeared in the 1930s; polyethylene, polyvinyl chloride, epoxy resin, and phenolic foams emerged in the 1940s; and expandable polystyrene foam and flexible polyurethane foam appeared in the 1950s. Basically, all plastics, including thermoplastics and thermosetting plastics, can be foamed into foam plastics. Industrial preparation methods include: extrusion foaming, injection molding foaming, molding foaming, calendering foaming, powder foaming, and spray foaming, among others.

[0003] For example, patent document CN206765209U discloses a vertical freezer body foaming fixture. This foaming tool is a common instrument in the foaming process of refrigerators, freezers and other equipment. Although it can realize the automated foaming of refrigerators and freezers, it still has the following defects: 1. As described in the patent's technical solution, "a mold-locking mechanism is provided above the top frame, and a length adjustment mechanism is provided at the rear of the top frame. The length adjustment mechanism is located above the worktable, and a water temperature control system is connected to the rear of the top frame below the length adjustment mechanism." The accompanying drawings of the patent clearly show that the replacement of the foaming mold in this device is extremely cumbersome, making it impossible to efficiently replace different types of foaming molds, thus reducing the actual working efficiency of the foaming process. 2. The existing base plate lifting method mostly adopts a single screw lifting structure. This lifting structure has the defect of poor lifting stability during the lifting process. 3. The base plate of existing foaming equipment mostly adopts the suggested support plate or support frame structure, which makes it impossible to place different models of refrigerators or freezers, thus reducing the applicable scope of existing foaming equipment.

[0004] To address the shortcomings of existing foaming equipment, we provide an automatic mold-changing foaming fixture and its usage method to solve the aforementioned problems. Summary of the Invention

[0005] In order to avoid and overcome the technical problems existing in the prior art, one of the objectives of this invention is to provide an automatic mold changing box foaming fixture, which can realize automatic mold changing. The lower mold can be prepared at the upper end while production is in progress, and it can be put into use after the top frame is flipped, which greatly saves mold changing time. At the same time, this invention also proposes a method of using the automatic mold changing box foaming fixture to further improve the efficiency of automatic mold changing.

[0006] To achieve the above objectives, the present invention employs an automatic mold-changing box foaming fixture, comprising: The top frame includes a horizontally rotatable flip plate, and two sets of baffle assemblies are placed on the upper and lower sides of the flip plate, the baffle assemblies forming a placement space for placing the mold. A lifting system includes at least one set of lead screw transmission assembly, the input end of which is provided with a power source, and a first lead screw nut is arranged on the lead screw transmission assembly and can move linearly along the lead screw transmission assembly. The base plate, which is used to place the parts to be processed, is arranged on the first wire nut and moves up and down with the first wire nut.

[0007] The above structure enables automatic mold changing. The lower mold can be prepared at the top while production is in progress, and it can be put into use after the top frame is flipped, which greatly saves mold changing time.

[0008] As a further optimization of the above solution, the baffle assembly includes a first baffle and a second baffle corresponding to the position, and an adjustment mechanism is arranged at the first baffle. The adjustment mechanism includes at least one adjusting screw, the adjusting screw is provided with a second screw seat, and the first baffle is arranged on the second screw seat.

[0009] The adjustment mechanism is used to achieve stable movement of the baffle assembly, so as to better limit the foaming mold.

[0010] As a further optimization of the above solution, the second baffle is hinged and a swing cylinder is provided on the outer side of the second baffle. The protruding end of the second baffle extends inward to form a fastening end. The pneumatic rod of the swing cylinder is hinged to the second baffle to realize the swinging action of the second baffle centered on the connection point of the second baffle.

[0011] During the lifting of the base plate, the second baffle is opened and moved aside by the swing cylinder. After the base plate reaches the designated position, the second baffle resumes its swing, thereby ensuring that the fastening end is stably fastened while avoiding collision between the fastening end and the product during the product fixing process.

[0012] As a further optimization of the above scheme, the aforementioned lead screw drive assembly includes two symmetrically positioned lead screws.

[0013] Compared to single-screw lifting transmission, the four-screw transmission selected in this invention has stronger stability, and two screws are driven by servo motors of both hands and a steering gear, thereby reducing the number of servo motors required for screw transmission and reducing the actual use cost of this invention.

[0014] As a further optimization of the above solution, the base plate includes a main board located in the middle and having multiple models, two sets of connector groups disposed on both sides of the main board, and a connecting plate connected to the outer end of the connector groups. The connector groups include multiple connectors arranged at equal intervals and detachably mounted on the main board so that the base plate forms a comb-like structure. Due to the use of the comb-like structure, the connectors can be disengaged by adjusting the connecting plate outwards, and different models of main boards can be replaced at this time, thereby efficiently achieving the width adjustment of the base plate.

[0015] As a further optimization of the above scheme, it also includes: The conveying mechanism is arranged on the connecting plate. The conveying mechanism includes a driving wheel and a driven wheel located at both ends of the connecting plate. A second servo motor is connected to the driving wheel. The conveyor belt for conveying the parts to be processed is arranged between the driving wheel and the driven wheel. Compared with manual transport of workpieces, automated transport can greatly reduce the workload of workers and improve the work efficiency of the foaming process.

[0016] As a further optimization of the above solution, a side plate is arranged above the connecting plate. After the bottom plate is raised, the two side plates, the first baffle, and the second baffle form a roughly rectangular processing space. Compared with the limit on both sides, the roughly rectangular limit can ensure that all four sides of the processed part are in the limit state, and the limit effect is stronger.

[0017] As a further optimization of the above solution, the upper and lower sides of the flip plate are provided with side plate limiting structures. The side plate limiting structure includes a receiving groove for accommodating the side plate. The side of the receiving groove is provided with a rotating nut. One end of the locking screw passes through the inner cavity of the receiving groove and is engaged with the rotating nut. The rotation drive mechanism is the power source of the rotating nut. By driving the rotating nut to rotate, the locking screw can be stably locked to the side plate.

[0018] As a further optimization of the above solution, one side plate corresponds to two side plate limiting structures at different positions. The rotation drive mechanism includes a third servo motor, which is arranged between the two side plate limiting structures. The output shaft of the third servo motor is provided with a connecting pulley that connects to the belt between the rotating nut. By using one servo motor to drive the two side plate limiting structures to operate simultaneously, it is not necessary to use one servo motor to drive one side plate limiting structure, thereby greatly reducing the actual cost of the present invention.

[0019] A method for using an automatic mold-changing box foaming fixture includes the following steps: S1. Hoist the foaming mold to the top placement space and fix it in place; S2. The flip plate is flipped horizontally, and a new foaming mold can be replaced in the top placement space. S3. Transport the parts to be processed to the base plate via a conveyor belt; S4. Lift the base plate using the lifting system until the foaming mold penetrates deep into the part to be processed; S5. Lock the side panel within the side panel limiting structure. S6. Foaming agent is filled into the part to be processed for foaming; S7. Open the side panel limiting structure and lower the base plate through the lifting system.

[0020] While the above production steps are being carried out, a lower mold can be prepared on the upper part of the flipping plate. After the top frame is flipped, it can be put into use, which greatly saves mold change time.

[0021] The automatic mold-changing box foaming fixture and its method of use of the present invention have the following beneficial effects: 1. The present invention provides an automatic mold changing box foaming fixture, which has a top flip plate that can be rotated 180 degrees. Two sets of front and rear baffles and adjustment mechanisms are placed on the front and back sides of the flip plate, one set is used below the top frame and the other set is located at the top of the top frame. In actual production, the upper end can be prepared for the lower mold. After the top frame is flipped, it can be put into use, which greatly saves the mold changing time. Based on the usage method of the automatic mold changing box foaming fixture, an automatic mold changing box foaming fixture can be used efficiently to ensure automatic mold changing in the foaming process and further save mold changing time.

[0022] 2. The automatic mold changing box foaming fixture of the present invention opens and makes room for the second baffle by means of a swing cylinder during the lifting of the base plate. After the base plate reaches the designated position, the second baffle resumes its swing, thereby ensuring that the fastening end is stably fastened while avoiding collision between the fastening end and the product during the product fixing process.

[0023] 3. The automatic mold changing box foaming fixture of the present invention has stronger stability than the single screw lifting transmission. Moreover, the two screws are driven by the servo motors of both hands and the steering gear, thereby reducing the number of servo motors required for the screw transmission and reducing the actual use cost of the present invention.

[0024] 4. The automatic mold changing box foaming fixture of the present invention adopts a comb-shaped base plate. By adjusting the connecting plate outward, the connecting parts can be disengaged. At this time, different models of main plates can be replaced, thereby efficiently realizing the width adjustment of the base plate.

[0025] 5. The present invention provides an automatic mold changing box foaming fixture, wherein an automated conveying mechanism is provided on the base plate. Compared with manual transport of workpieces, automated transport can greatly reduce the workload of workers and improve the work efficiency of the foaming process.

[0026] 6. The automatic mold changing box foaming fixture of the present invention uses a lead screw and lead screw seat structure for locking the side plate limiting structure. The locking lead screw is stably locked to the side plate by driving the rotating nut to rotate. Furthermore, the side plate limiting structure uses a servo motor to drive two side plate limiting structures to operate simultaneously, eliminating the need for a servo motor to drive one side plate limiting structure, thereby greatly reducing the actual cost of the present invention.

[0027] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the workflow of an automatic mold-changing foaming fixture; Figure 2 This is a schematic diagram of the main structure of an automatic mold-changing foaming fixture. Figure 3 This is a side view of an automatic mold-changing foaming fixture. Figure 4 This is a top view of the base plate in this invention. Figure 5 This is a bottom-view structural diagram of the power source in this invention; Figure 6 This is a schematic diagram of the overall structure of the top frame in this invention.

[0029] In the diagram: 1. Top frame; 2. Baffle assembly; 3. Lifting system; 4. Base plate; 5. Conveying mechanism; 6. Side plate; 7. Side plate limiting structure; 8. Rotary drive mechanism; 11. Tilting plate; 21. First baffle; 22. Second baffle; 23. Adjustment mechanism; 31. Screw drive assembly; 32. Power source; 33. Screw nut; 41. Main board; 42. Connecting assembly; 43. Connecting plate; 51. Driving wheel; 52. Driven wheel; 53. Conveyor belt; 71. Receiving groove; 72. Rotating nut; 73. Locking screw; 81. Third servo motor; 82. Connecting wheel; 221. Swing cylinder; 222. Fastening end; 231. Adjusting screw; 232. Second screw nut; 311. Transmission screw; 421. Connecting component; 511. Second servo motor. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0031] It should be noted that when an element is referred to as "set on" or "provided with" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this document. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Please refer to the instruction manual appendix. Figure 1-6 The present invention provides a technical solution: an automatic mold changing box foaming fixture, comprising: The overall frame consists of, from top to bottom, a top frame, a base plate, and a bottom support frame, wherein: The top frame 1 is located at the top of the overall frame and is fixed to the supporting frame members by multiple vertical welded columns. The top frame includes two side plates and a flip plate located in the middle. The middle of the flip plate passes through a rotating shaft, and a section of the rotating shaft passes through the side plates of the top frame and is connected to the power equipment. Preferably, in this embodiment, the power equipment is a fourth servo motor.

[0033] Baffle assembly 2, in this embodiment there are 2 sets of baffle assembly 2, which are placed on the upper and lower sides of the flip plate 11. Specifically, the baffle assembly 2 includes a first baffle 21 and a second baffle 22 with corresponding positions. The baffle assembly 2 forms a placement space for placing the foaming mold. A positioning structure is arranged in the aforementioned placement space to position and suspend the foaming mold in the top placement space. Generally, this positioning structure adopts a snap-fit ​​structure, such as a snap-fit ​​block arranged in the placement space, and the mold is provided with a snap-fit ​​groove. During the process of the foaming mold falling, under the action of gravity, the snap-fit ​​block snaps into the snap-fit ​​groove to realize the snap-fit ​​locking work of the snap-fit ​​block.

[0034] Adjustment mechanism 23 is arranged at the first baffle 21. The adjustment mechanism 23 includes at least one adjusting screw 231. The adjusting screw 231 is provided with a second screw nut 232, and the first baffle 21 is arranged on the second screw nut 232. Thus, through the screw and screw nut cooperation structure, the first baffle 21 can be moved stably. A swing structure is arranged on the outside of the second baffle 22, which is hinged. The pneumatic rod of the swing cylinder 221 is hinged to the second baffle 22 to realize the swinging action of the second baffle 22 centered on the connection point of the second baffle 22.

[0035] The lifting system 3 includes at least one set of lead screw transmission group 31. The input end of the lead screw transmission group 31 is provided with a power source 32. The first lead screw nut 33 is arranged on the lead screw transmission group 31 and can move linearly along the lead screw transmission group 31.

[0036] Furthermore, considering the poor stability of single screw transmission, the above-mentioned ball screw transmission assembly 31 includes two symmetrically positioned transmission screws 311. It should be noted that the transmission screw 311 is a ball screw, and the ball screw uses a non-typical T-type thread, such as a rectangular thread, and the ball screw is equipped with a guide post for guidance.

[0037] Furthermore, the power source 32 includes a dual-axis third servo motor. The output end of the third servo motor is connected to a first steering gear. The first steering gear has a first connecting end connected to the output end of the third servo motor and second connecting ends located on both sides of the first steering gear. A first drive shaft is connected to the second connecting end. The other end of the first drive shaft is connected to a second steering gear via a coupling. The second steering gear has a third connecting end connected to the first drive shaft and fourth connecting ends located on both sides of the second steering gear. A second drive shaft is connected to the fourth connecting end. The second drive shaft is connected to the transmission screw 311 via a third steering gear, so as to achieve the purpose of one servo motor driving four transmission screws 311 to operate simultaneously.

[0038] The base plate 4, which is used to place the parts to be processed, is arranged on the first wire seat 33 and moves up and down with the first wire seat 33.

[0039] Specifically, the base plate 4 includes a main board 41 located in the middle and having multiple models, two sets of connector groups 42 disposed on both sides of the main board 41, and a connecting plate 43 connected to the outer end of the connector group 42. The connector group 42 includes multiple connectors 421 arranged at equal intervals and detachably disposed on the main board 41 so that the base plate 4 forms a comb-like structure. Since the base plate 4 adopts a comb-like structure, by adjusting the connecting plate 43 outward, the connectors 421 can be disengaged. At this time, different models of main boards 41 can be replaced, thereby efficiently realizing the width adjustment of the base plate 4.

[0040] The conveying mechanism 5 is arranged on the connecting plate 43. The conveying mechanism 5 includes a driving wheel 51 and a driven wheel 52 respectively located at both ends of the connecting plate 43. A second servo motor 511 is connected to the driving wheel 51. The conveyor belt 53 for conveying the parts to be processed is arranged between the driving wheel 51 and the driven wheel 52.

[0041] Side plate 6 is arranged above the connecting plate 43. After the bottom plate 4 is raised, the two side plates 6, the first baffle 21 and the second baffle 22 form a roughly rectangular processing space. The upper and lower sides of the flip plate 11 are provided with side plate limiting structures 7. The side plate limiting structure 7 includes a receiving groove 71 for accommodating the side plate 6. The side of the receiving groove 71 is provided with a rotating nut 72. One end of the locking screw 73 passes through the inner cavity of the receiving groove 71 and is in a cooperating structure with the rotating nut 72. The rotating drive mechanism 8 is the power source for the rotating nut 72.

[0042] Furthermore, one side plate 6 corresponds to two side plate limiting structures 7 at corresponding positions. The rotary drive mechanism 8 includes a third servo motor 81, which is arranged between the two side plate limiting structures 7. The output shaft of the third servo motor 81 is provided with a connecting wheel 82 that connects to the belt between the rotating nut 72.

[0043] 10. A method of using an automatic mold-changing box foaming fixture according to any one of claims 1-9, comprising the following steps: S1. Hoist the foaming mold to the top placement space and fix it in place; S2. The flip plate 11 is flipped horizontally by 180 degrees, and a new foaming mold can be replaced in the top placement space. S3. The parts to be processed are transported to the base plate (4) via conveyor belt 53; S4. Lift the base plate 4 using the lifting system 3 until the foaming mold penetrates deep into the part to be processed. S5. Lock the side panel 6 within the side panel limiting structure 7. S6. Foaming agent is filled into the part to be processed for foaming; S7. Open the side panel limiting structure 7 and lower the bottom plate 4 through the lifting system 3.

[0044] It should be noted that during the above processing, the lower foaming mold can be prepared at the top of the flip plate 11 at any time. After the top frame 1 is flipped, it can be put into use, which greatly saves the mold changing time. Based on the use method of the automatic mold changing box foaming fixture, an automatic mold changing box foaming fixture can be used efficiently to ensure the automatic mold changing of the foaming process and further save the mold changing time.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic mold-changing foaming fixture, characterized in that, include: Top frame (1), which includes a horizontally rotatable flip plate (11), and two sets of baffle assemblies (2) are placed on the upper and lower sides of the flip plate (11), and the baffle assemblies (2) form a placement space for placing the mold. The lifting system (3) includes at least one set of lead screw transmission group (31), the input end of the lead screw transmission group (31) is provided with a power source (32), the first lead screw nut (33) is arranged on the lead screw transmission group (31) and the first lead screw nut (33) can move linearly along the lead screw transmission group (31); The base plate (4), which is used to place the parts to be processed, is arranged on the first wire nut (33) and moves up and down with the first wire nut (33); The baffle assembly (2) includes a first baffle (21) and a second baffle (22) corresponding to the position. The adjustment mechanism (23) is arranged at the first baffle (21). The adjustment mechanism (23) includes at least one adjusting screw (231). The adjusting screw (231) is provided with a second screw seat (232), and the first baffle (21) is arranged on the second screw seat (232). The base plate (4) includes a main board (41) located in the middle and having various models, two sets of connector groups (42) disposed on both sides of the main board (41), and a connecting plate (43) connected to the outer end of the connector group (42). The connector group (42) includes multiple connectors (421) arranged at equal intervals and detachably disposed on the main board (41) so that the base plate (4) forms a comb-like structure. Side plate (6), which is arranged above the connecting plate (43), and after the bottom plate (4) is raised, the two side plates (6), the first baffle (21) and the second baffle (22) form a roughly rectangular processing space; The above-mentioned flip plate (11) is provided with side plate limiting structure (7) on both the upper and lower sides. The side plate limiting structure (7) includes a receiving groove (71) for receiving the side plate (6). The side of the receiving groove (71) is provided with a rotating nut (72). One end of the locking screw (73) passes through the inner cavity of the receiving groove (71) and is in a cooperating structure with the rotating nut (72). The rotating drive mechanism (8) is the power source of the rotating nut (72). The second baffle (22) is hinged and a swing cylinder (221) is provided on the outer side of the second baffle (22). The protruding end of the second baffle (22) extends inward to form a snap-fit ​​end (222). The pneumatic rod of the swing cylinder (221) is hinged to the second baffle (22) to realize the swing action of the second baffle (22) centered on the connection point of the second baffle (22). The aforementioned lead screw drive assembly (31) includes two symmetrically positioned lead screws (311).

2. The automatic mold-changing box foaming fixture according to claim 1, characterized in that: Also includes: The conveying mechanism (5) is arranged on the connecting plate (43). The conveying mechanism (5) includes a drive wheel (51) and a driven wheel (52) located at both ends of the connecting plate (43). A second servo motor (511) is connected to the drive wheel (51). The conveyor belt (53) for conveying the parts to be processed is arranged between the drive wheel (51) and the driven wheel (52).

3. The automatic mold-changing box foaming fixture according to claim 2, characterized in that: One side plate (6) corresponds to two side plate limiting structures (7) at corresponding positions. The rotary drive mechanism (8) includes a third servo motor (81), which is arranged between the two side plate limiting structures (7). The output shaft of the third servo motor (81) is provided with a connecting wheel (82) that connects to the belt between the rotating nut (72).

4. The method of using an automatic mold-changing box foaming fixture according to any one of claims 1-3, characterized in that: Includes the following steps: S1. Hoist the foaming mold to the top placement space and fix it in place; S2. Flip the flip plate (11) horizontally 180 degrees and replace the foaming mold in the top placement space. S3. Transport the parts to be processed to the base plate (4) via conveyor belt (53); S4. Lift the bottom plate (4) through the lifting system (3) until the foaming mold penetrates into the part to be processed; S5. Lock the side plate (6) inside the side plate limiting structure (7); S6. Foaming agent is filled into the part to be processed for foaming; S7. Open the side plate limiting structure (7) and lower the bottom plate (4) through the lifting system (3).

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