Novel trimming mechanism of door liner forming machine

Abstract

The invention relates to a novel door liner forming machine trimming mechanism which comprises a first rack, a fixed platform is horizontally arranged on the top face of the first rack, hydraulic cylinders are vertically and symmetrically arranged at the two ends of the top face of the fixed platform respectively, an upper die frame is horizontally and vertically erected between piston rods of the two hydraulic cylinders, and an upper cutting die is attached to the middle of the bottom face of the upper die frame. The upper cutting die is clamped and fixed through a die locking mechanism annularly arranged on the periphery of the upper cutting die. A second rack is oppositely arranged in the forward direction of the first rack, an advancing and retreating workbench is horizontally and slidably arranged on the top face of the second rack in the short edge direction of the second rack, the bottom face of the advancing and retreating workbench is flush with the top face of the fixed platform, and a lower cutting die is positioned and placed in the middle of the top face of the advancing and retreating workbench. The lower cutting die is driven by the advancing and retreating workbench to move to the position under the upper cutting die, the upper cutting die is matched with the lower cutting die, and upper and lower die assembly is achieved through driving of the hydraulic cylinder, so that the four edges of the door liner can be synchronously sheared at the same time, the trimming work time is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerator door liner processing, and in particular relates to a novel edge trimming mechanism of a door liner forming machine. Background Art

[0002] The refrigerator door liner is an important component of the refrigerator door body. It is located inside the door shell and mainly plays the role of heat insulation and heat preservation. It is also an isolation barrier between the internal space of the refrigerator and the external environment.

[0003] In the existing market, refrigerator door liner is mainly formed by vacuum forming through molds, and the corner waste of the door liner needs to be cut off after the mold forming; at present, most of the equipment of domestic and foreign manufacturers adopts a single trimming machine, which completes the shearing of the four sides of the door liner in sequence through rotation, and then cuts the product into pieces through a middle cutting machine. The trimming operation time is long, the rhythm is insufficient, the production efficiency is low, and it cannot meet the production needs of manufacturers well. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a novel trimming mechanism for a door liner forming machine. The specific technical solution is as follows:

[0005] The present invention provides a novel trimming mechanism for a door liner forming machine, comprising a frame 1, a fixed platform is horizontally arranged on the top surface of the frame 1, hydraulic cylinders are vertically and symmetrically arranged at both ends of the top surface of the fixed platform, an upper mold frame is horizontally and vertically arranged between the piston rods of the two hydraulic cylinders, an upper cutting mold is attached to the middle part of the bottom surface of the upper mold frame, and the upper cutting mold is clamped and fixed by a locking mold mechanism arranged around the outer periphery thereof; a frame 2 is arranged opposite to the frame 1 in a positive direction, an advance and retreat workbench is horizontally slidably arranged on the top surface of the frame 2 along the short side direction thereof, and the bottom surface of the advance and retreat workbench is flush with the top surface of the fixed platform, and a lower cutting mold is placed at a fixed position in the middle part of the top surface;

[0006] The advance and retreat workbench is divided into a first working state and a second working state. When in the first working state, the advance and retreat workbench is stationary on the second top surface of the frame, and a door liner matching it is clamped in the lower cutting die; when in the second working state, the advance and retreat workbench is slid on the top surface of the fixed platform, and the upper cutting die is driven downward by the hydraulic cylinder to close the mold with the lower cutting die to complete the synchronous shearing of the four sides of the door liner.

[0007] As a preferred technical solution of the present invention, the clamping mechanism includes four end clamping die sets symmetrically distributed along the short side direction of the bottom surface of the upper mold frame, and two side clamping die sets symmetrically distributed along the long side direction of the bottom surface of the upper mold frame;

[0008] The end locking die set comprises a guide support groove with an open end, the top surface of the guide support groove is fixedly connected to the bottom surface of the upper die frame, a lock tongue 1 with a step-shaped structure is arranged in the guide support groove for transverse sliding cooperation, and the inner end of the lock tongue 1 is drivingly connected to the piston rod of the cylinder 1 vertically fixed to the closed end of the guide support groove;

[0009] The side locking mold group includes a long strip, on the top surface of which a plurality of inverted U-shaped support frames are vertically arranged at equal intervals, and the top surface of the support frame is fixedly connected to the bottom surface of the upper mold frame; a second lock tongue is rotatably connected inside the support frame, and an arc-shaped pressure strip and an arc-shaped rack are respectively and integrally connected to the inner and outer ends of the second lock tongue; a plurality of guide support rails of L-shaped structure are vertically suspended at equal intervals on the outer side surface of the long strip, and each guide support rail is arranged opposite to the corresponding second lock tongue, and a linkage rod is arranged between the vertical portions of the plurality of guide support rails for horizontal sliding engagement, and a plurality of spur racks are horizontally and vertically fixedly connected to the inner surface of the linkage rod at equal intervals, and each spur rack is meshed and connected with the arc-shaped rack corresponding to the second lock tongue; a second cylinder is horizontally suspended on the outer side of the long strip, and the piston rod of the second cylinder is linkage-connected to the outer surface of the linkage rod.

[0010] As a preferred technical solution of the present invention, the upper cutting die comprises a bottom plate 1, and the bottom plate 1 is fixed to the bottom surface of the upper die frame through the clamping mechanism; at least one square ring-shaped pad 1 is integrally fixedly connected to the middle of the bottom surface of the bottom plate 1, and a stainless steel sheet matching it is fixedly attached to the top surface of the pad 1;

[0011] The lower cutting die comprises a bottom plate 2 which is fixedly placed on the top surface of the advance and retreat workbench, a pad plate 2 which is vertically opposite to the pad plate 1 is integrally fixedly connected to the middle of the top surface of the bottom plate 2, a floating platform which matches the pad plate 2 is arranged on the top surface, a square groove is opened inwardly in the middle of the top surface of the floating platform, a square ring-shaped cutting knife is circumferentially fixed to the inner side wall of the square groove, and the top cutting edge of the cutting knife extends to the outside of the floating platform; a square ring-shaped positioning plate is sleeved on the middle of the inner part of the cutting knife.

[0012] As a preferred technical solution of the present invention, an annular groove is arranged circumferentially along the edge of the bottom surface of the floating platform, and a plurality of springs are evenly distributed vertically in the annular groove, and a mounting plate is vertically connected to the bottom ends of the plurality of springs, and the bottom surface of the mounting plate is in contact with the top surfaces of the two pads; a square ring-shaped skirt plate is vertically fixedly connected to the bottom surface of the floating platform along the outer edge of the annular groove, and the inner bottom edge of the skirt plate is sleeved with a gap between the top edge of the mounting plate;

[0013] A cross protrusion is vertically fixed to the middle of the bottom surface of the mounting plate, and cross grooves for concentrically placing the cross protrusions are provided inwardly on the two top surfaces of the pad plate. Square grooves are symmetrically provided on both sides of the ends of the cross grooves, and an elastic component is provided in each of the square grooves. The elastic components opposite to each other are used to clamp the ends of the corresponding cross protrusions.

[0014] As a preferred technical solution of the present invention, the elastic component includes at least two guide rods passing through the inner side walls of the corresponding square grooves with vertical relative gaps, and a rectangular baffle is vertically connected between the inner end faces of the two guide rods; the outer end face of the guide rod is axially connected to a top spring vertically fixed on the outer side wall of the corresponding square groove; the baffle is kept in close contact with the end side of the corresponding cross protrusion under the elastic force of the top spring.

[0015] As a preferred technical solution of the present invention, a U-shaped positioning groove is symmetrically provided along the midline of the second inner edge of the bottom plate of the lower cutting die, and a second positioning hole is symmetrically provided along the midline of the outer edge; the positioning groove is snap-fitted with a corresponding positioning pin 1 vertically connected to the top surface of the advance and retreat worktable, and the second positioning hole is snap-fitted with a corresponding positioning pin 2 vertically connected to the top surface of the advance and retreat worktable; wedge blocks are vertically symmetrically provided at both ends of the top surface of the advance and retreat worktable along its long axis.

[0016] As a preferred technical solution of the present invention, a plurality of lifting cylinders arranged in a matrix are provided in the middle part of the frame two, the top end of the piston rod of each of the lifting cylinders is axially and vertically connected to a round support platform, three ball seats arranged in a triangle are fixedly connected to the top surface of the round support platform, and a universal ball is embedded in the middle part of the top surface of each ball seat; when the advance and retreat workbench is stationary on the top surface of the frame two, the lifting cylinder pushes the gap of the round support platform through the corresponding circular hole opened on the advance and retreat workbench.

[0017] As a preferred technical solution of the present invention, the outer side edge ends of the advance and retreat workbench are respectively connected to the linear guide pairs symmetrically arranged on the short edges of the top surface of the second frame; sprocket chains are symmetrically arranged on the short sides of the top of the second frame, and the sprocket chains are driven by a servo motor arranged on the second frame; the outer side edge ends of the advance and retreat workbench and the corresponding sprocket chains are bridged and linked through a connecting block adapted thereto.

[0018] As a preferred technical solution of the present invention, four-link guide columns which can be raised and lowered synchronously with the upper mold frame are respectively provided at the ends of the fixed platform in a vertically symmetrical manner along the corresponding hydraulic cylinders.

[0019] As a preferred technical solution of the present invention, the top surfaces of the ends of the fixed platforms are respectively provided with limit mechanisms symmetrically along the longitudinal direction of the corresponding hydraulic cylinders, and the limit mechanisms are located on the outer sides of the corresponding four-link guide columns;

[0020] The limiting mechanism includes a rotating drum rotatably connected to the fixed platform, and the rotating drum is driven by a worm gear sleeved therewith to realize positioning and rotation. A lifting column is screwed in the rotating drum, and a guide block is horizontally and vertically connected to the bottom end of the lifting column. One end of the guide block is longitudinally slidably engaged with a slide rail vertically connected to the bottom surface of the fixed platform; a limiting sleeve is axially sleeved on the top of the lifting column.

[0021] The beneficial effects of the present invention are:

[0022] The trimming mechanism of the present invention drives the lower cutting die to move to just below the upper cutting die through the advance and retreat workbench, adopts the cooperation of the upper and lower cutting die, and realizes the upper and lower mold closing through the drive of the hydraulic cylinder, so that the four sides of the door liner can be synchronously sheared at the same time. Compared with the traditional single trimming machine's sequential rotating shearing method, the trimming time is greatly shortened and the production efficiency is improved. The synchronous shearing also reduces the error caused by multiple positioning and improves the consistency of the product. Due to the realization of synchronous shearing, the entire trimming process is smoother, the production rhythm is significantly improved, and the manufacturer's needs for efficient and continuous production can be better met. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The overall structural diagram of the present invention is shown (I);

[0024] Figure 2 Shows Figure 1 A magnified view of the structure of the middle A part;

[0025] Figure 3 Shows Figure 1 A magnified view of the structure of the middle B area;

[0026] Figure 4 Shows Figure 1 A magnified view of the structure of the middle C part;

[0027] Figure 5 The overall structural diagram of the present invention is shown (II);

[0028] Figure 6 The schematic diagram of the structure of the bottom plate 1 of the clamping mechanism for clamping the upper cutting die in the present invention is shown;

[0029] Figure 7 A schematic diagram showing the structure of a single end lock module in the present invention is shown;

[0030] Figure 8 A schematic diagram showing the structure of two side locking modules in the present invention is shown;

[0031] Fig. 9 The schematic diagram of the structure of the upper cutting die using a quadruple assembly in the present invention is shown;

[0032] Fig.10 The schematic diagram of the structure of the lower cutting die using a quadruple assembly in the present invention is shown;

[0033] Fig.11 The schematic diagram of the structure of the assembly of the floating platform and the backing plate 2 of the lower cutting die in the present invention is shown;

[0034] Fig.12A schematic diagram showing the structure of the assembly of the floating platform and the mounting plate in the present invention is shown;

[0035] Fig.13 A schematic diagram showing the structure of the floating platform and the mounting plate in the present invention is shown;

[0036] Fig.14 The schematic diagram of the structure of the cross groove on the second upper pad of the lower die plate of the present invention is shown;

[0037] Fig.15 The schematic diagram of the structure of the assembly of the two cross grooves and the cross protrusions on the backing plate of the lower cutting die in the present invention is shown.

[0038] As shown in the figure: 1. Frame 1; 11. Fixed platform; 2. Hydraulic cylinder; 21. Four-link guide column; 22. Limiting mechanism; 221. Rotating drum; 222. Worm gear; 223. Lifting column; 224. Limiting sleeve; 225. Slide rail; 226. Guide block; 3. Upper mold frame; 4. Locking mechanism; 41. End locking mold group; 411. Guide support groove; 412. Cylinder 1; 413. Lock tongue 1; 42. Side locking mold group; 421. Long strip; 422. Support frame; 423. Lock tongue 2; 4231. Arc rack; 4232. Arc pressure strip; 424. Guide support rail; 425. Linkage rod; 4251. Straight rack; 426. Cylinder 2; 5. Frame 2; 51. Linear guide pair; 52. Sprocket chain; 53. Connecting block; 54. Servo motor; 6, advance and retreat workbench; 61, positioning pin one; 62, positioning pin two; 63, wedge block; 64, round hole; 7, lifting cylinder; 71, round support platform; 72, ball seat; 73, universal ball; 8, upper cutting die; 81, bottom plate one; 811, positioning hole one; 82, pad one; 83, stainless steel sheet; 9, lower cutting die; 91, bottom plate two; 911, positioning groove; 912, positioning hole two; 92, pad two; 921, cross groove; 922, square groove; 923, elastic component; 9231, guide rod; 9232, baffle; 9233, top spring; 93, floating platform; 931, ring groove; 932, spring; 933, skirt board; 934, mounting plate; 935, cross protrusion; 94, cutter; 95, positioning plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Embodiment 1

[0041] In order to solve the technical problems in the background technology, a new type of trimming mechanism of a door liner forming machine is provided as follows:

[0042] Combination Figure 1 As shown, a novel trimming mechanism of a door liner forming machine comprises a frame 1, a fixed platform 11 is horizontally arranged on the top surface of the frame 1, hydraulic cylinders 2 are vertically and symmetrically arranged at both ends of the top surface of the fixed platform 11, an upper mold frame 3 is horizontally and vertically arranged between the piston rods of the two hydraulic cylinders 2, an upper cutting mold 8 is attached to the middle part of the bottom surface of the upper mold frame 3, and the upper cutting mold 8 is clamped and fixed by a locking mechanism 4 arranged around its outer periphery; a frame 2 5 is arranged opposite to the frame 1 in the positive direction, and an advance and retreat workbench 6 is arranged on the top surface of the frame 2 5 for horizontal sliding along its short side direction, and the bottom surface of the advance and retreat workbench 6 is flush with the top surface of the fixed platform 11, and a lower cutting mold 9 is placed at a fixed position in the middle part of its top surface;

[0043] The advance and retreat workbench 6 is divided into a first working state and a second working state. When in the first working state, the advance and retreat workbench 6 is stationary on the top surface of the frame 2 5, and a door liner matching it is clamped in the lower cutting die 9; when in the second working state, the advance and retreat workbench 6 is slid on the top surface of the fixed platform 11, and the upper cutting die 8 is driven downward by the hydraulic cylinder 2 to close the mold with the lower cutting die 9 to complete the synchronous shearing of the four sides of the door liner.

[0044] By adopting the above technical solution, the trimming mechanism drives the lower cutting die 9 to move to the bottom of the upper cutting die 8 through the advance and retreat workbench 6, and the upper and lower cutting die 8 cooperate with the lower cutting die 9, and the upper and lower molds are closed by the drive of the hydraulic cylinder 2, so that the four sides of the door liner can be synchronously sheared at the same time. Compared with the traditional single trimming machine's sequential rotating shearing method, the trimming time is greatly shortened and the production efficiency is improved. Synchronous shearing also reduces the errors caused by multiple positioning and improves the consistency of the product. Due to the realization of synchronous shearing, the entire trimming process is smoother, the production rhythm is significantly improved, and it can better meet the manufacturers' needs for efficient and continuous production.

[0045] In addition, due to the design of the locking mechanism 4, the clamping and releasing actions of the upper cutting die 8 are quick, reducing the waste of non-production time such as mold changing and improving the overall operating efficiency; the shape and size of the upper cutting die 8 and the lower cutting die 9 can also be adjusted so that the trimming mechanism can adapt to the trimming requirements of door liner of different specifications and shapes, thereby improving the versatility and flexibility of the equipment.

[0046] Embodiment 2

[0047] Combination Figure 1 , Figure 2 as well as Figures 4 to 8 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0048] In this embodiment, if Figure 1 , Figure 6 to Figure 8As shown, the mold locking mechanism 4 includes four end locking mold groups 41 symmetrically distributed in pairs along the short side direction of the bottom surface of the upper mold frame 3, and two side locking mold groups 42 symmetrically distributed along the long side direction of the bottom surface of the upper mold frame 3;

[0049] The end locking die set 41 comprises a guide support groove 411 with an open end, the top surface of the guide support groove 411 is fixedly connected to the bottom surface of the upper die frame 3, a locking tongue 413 with a step-shaped structure is arranged in the guide support groove 411 for transverse sliding cooperation, and the inner end of the locking tongue 413 is drivingly connected to the piston rod of the cylinder 412 vertically fixed to the closed end of the guide support groove 411;

[0050] The side locking mold assembly 42 includes a long strip 421, and a plurality of inverted U-shaped support frames 422 are vertically arranged at equal intervals on the top surface of the long strip 421, and the top surface of the support frame 422 is fixedly connected to the bottom surface of the upper mold frame 3; a second locking tongue 423 is rotatably connected inside the support frame 422, and the inner and outer ends of the second locking tongue 423 are respectively and integrally connected with an arc-shaped pressure strip 4232 and an arc-shaped rack 4231; a plurality of L-shaped guide support rails 424 are vertically suspended at equal intervals on the outer side surface of the long strip 421, and each guide support rail 4 24 are arranged opposite to the corresponding locking tongue 2 423, and a linkage rod 425 is arranged between the vertical parts of the multiple guide rails 424 for horizontal sliding and card-engaging cooperation, and a plurality of spur racks 4251 are fixedly connected horizontally and vertically at equal intervals on the inner facade of the linkage rod 425, and each spur rack 4251 is meshed and connected with the arc-shaped rack 4231 corresponding to the locking tongue 2 423; a cylinder 2 426 is suspended horizontally on the outer side of the long plate 421, and the piston rod of the cylinder 2 426 is linked and connected with the outer facade of the linkage rod 425.

[0051] By adopting the above technical solution, the clamping mechanism 4 is set to fix and lift the upper cutting die 8 on the upper mold frame 3 through multi-point clamping, which enhances the stability during the mold closing process and avoids safety accidents caused by loosening or deviation of the upper cutting die 8.

[0052] The end locking die set 41 realizes high-precision clamping and positioning of the upper cutting die 8 in the short side direction by means of the horizontal sliding of the locking tongue 413 in the guide support groove 411 and the precise driving of the cylinder 412, thereby ensuring the stability of the upper cutting die 8 during the mold closing process and avoiding the shearing accuracy problem caused by position offset; the locking tongue 41 is designed as a step-shaped structure, which can facilitate the clamping and supporting of the end of the bottom plate 81 of the upper cutting die 8;

[0053] The side locking mold assembly 42 utilizes the meshing transmission of the arc-shaped rack 4231 and the straight rack 4251, as well as the driving of the linkage rod 425 by the cylinder 2 426, to achieve the synchronous rotation of the locking tongue 2 423; this linkage mechanism not only improves the clamping accuracy of the upper cutting mold 8 in the long side direction, but also ensures that multiple locking tongues 2 423 can evenly and consistently press the side edge of the bottom plate 1 81 of the upper cutting mold 8, further improving the accuracy and stability of the mold closing.

[0054] like Figure 2 As shown, the outer side ends of the advance and retreat workbench 6 are respectively connected to the linear guide pairs 51 symmetrically arranged on the short edges of the top surface of the frame 2 5; the sprocket chains 52 are symmetrically arranged on the short sides of the top of the frame 2 5, and the sprocket chains 52 are driven by a servo motor 54 arranged on the frame 2 5; the outer side ends of the advance and retreat workbench 6 and the corresponding sprocket chains 52 are bridged and linked through a connecting block 53 adapted thereto.

[0055] By adopting the above technical solution, the outer side ends of the advance and retreat workbench 6 are respectively connected to the linear guide rail pairs 51 symmetrically arranged on the short edges of the top surface of the frame 2 5, ensuring the smooth sliding of the advance and retreat workbench in the horizontal direction.

[0056] At the same time, the driving combination of the sprocket chain 52 and the servo motor 54 realizes the rapid response and precise control of the advance and retreat action of the advance and retreat worktable 6. The servo motor 54 can precisely control the rotation speed and direction of the sprocket chain 52 according to a preset program or external signal, thereby driving the advance and retreat worktable 6 to move forward and backward according to a predetermined trajectory; this driving method not only improves the work efficiency, but also enhances the automation of the equipment.

[0057] Due to the adoption of efficient driving and guiding mechanisms, the advance and retreat action of the advance and retreat worktable 6 is faster and more stable, thereby shortening the time of the entire trimming process. This helps to improve the production rhythm, so that the equipment can better adapt to the needs of high-speed and continuous production. At the same time, the stable advance and retreat action also reduces the production delay caused by waiting or adjustment time, further improving production efficiency.

[0058] like Figure 1 and Figure 5 As shown, four-link guide columns 21 which can be raised and lowered synchronously with the upper mold frame 3 are vertically symmetrically provided at the ends of the fixed platform 11 along the corresponding hydraulic cylinders 2 .

[0059] By adopting the above technical solution, the four-link guide column 21 is set so that the upper mold frame 3 can not only realize the vertical lifting movement under the drive of the hydraulic cylinder 2, but also its movement trajectory is more stable and controllable, which can ensure that the upper mold frame 3 remains in a horizontal state during the lifting process, avoiding the problem of inaccurate cutting caused by tilting or shaking.

[0060] Since the four-link guide column 21 rises and falls synchronously with the upper mold frame 3, during the mold closing process, the upper cutting mold 8 can be accurately aligned with the lower cutting mold 9, ensuring that the four sides of the door liner can be sheared simultaneously and evenly. This high-precision mold closing action not only improves the trimming efficiency, but also reduces the waste and defective rate caused by inaccurate alignment.

[0061] like Figure 1 and Figure 4 As shown, the top surfaces of the ends of the fixed platform 11 are respectively provided with limit mechanisms 22 symmetrically along the longitudinal direction of the corresponding hydraulic cylinders 2, and the limit mechanisms 22 are located at the outer sides of the corresponding four-link guide pillars 21;

[0062] The limiting mechanism 22 includes a rotating drum 221 that is rotatably connected to the fixed platform 11. The rotating drum 221 is driven by a worm gear 222 that is sleeved therewith to realize positioning rotation. A lifting column 223 is screwed in the rotating drum 221. A guide block 226 is horizontally and vertically connected to the bottom end of the lifting column 223. One end of the guide block 226 is longitudinally slidably engaged with a slide rail 225 that is vertically connected to the bottom surface of the fixed platform 11. A limiting sleeve 224 is axially sleeved on the top of the lifting column 223.

[0063] By adopting the above technical solution, the limit mechanism 22 can accurately control the rotation angle of the drum 221 through its internal worm gear 222 transmission system, and then drive the lifting column 223 to move up and down through the threaded transmission. This design allows the upper mold frame 3 to be accurately limited and adjusted when it is lifted and lowered by the hydraulic cylinder 2. This is very important for ensuring the mold clamping accuracy between the upper cutting die 8 and the lower cutting die 9, and protecting the shearing part of the lower cutting die 9, which helps to improve the trimming quality and product consistency. Among them, the worm gear 222 transmission system has a self-locking function, which can keep the position of the lifting column 223 unchanged when the power is off or shut down, thereby simplifying the operation process and improving the safety of the equipment.

[0064] The bottom of the lifting column 223 in the limiting mechanism 22 is engaged with the longitudinal sliding of the slide rail 225 through the guide block 226 to form a stable guiding system. This design limits the lateral deviation and shaking of the lifting column 223 during the lifting process, thereby enhancing the stability of the entire trimming process.

[0065] The setting of the limiting sleeve 224 plays a role in protecting the lifting column 223. When the lifting column 223 reaches a predetermined position, the limiting sleeve 224 and the upper mold frame 3 have a limiting collision, thereby extending the service life of the lifting column 223.

[0066] Embodiment 3

[0067] Combination Figures 9 to 15As shown, based on the above embodiment, this embodiment further provides the following contents:

[0068] In this embodiment, if Fig. 9 and Fig.10 As shown, the upper cutting die 8 comprises a bottom plate 81, and the bottom plate 81 is fixed to the bottom surface of the upper die frame 3 through the clamping mechanism 4; at least one square ring-shaped pad 82 is integrally fixedly connected to the middle of the bottom surface of the bottom plate 81, and a stainless steel sheet 83 matching with the pad 82 is fixedly attached to the top surface of the pad 82;

[0069] The lower cutting die 9 includes a bottom plate 91 which is fixedly placed on the top surface of the advance and retreat workbench 6, and a backing plate 92 which is vertically opposite to the backing plate 82 is integrally fixedly connected to the middle of the top surface of the bottom plate 91, and a floating platform 93 which is adapted thereto is arranged on the top surface of the backing plate 92, and a square groove is opened inwardly in the middle of the top surface of the floating platform 93, and a square ring-shaped cutting knife 94 is circumferentially fixed to the inner side wall of the square groove, and the top cutting edge of the cutting knife 94 extends to the outside of the floating platform 93; a square ring-shaped positioning plate 95 is sleeved on the middle of the inner part of the cutting knife 94.

[0070] By adopting the above technical solution, the design of the upper cutting die 8 and the lower cutting die 9 enables the hydraulic cylinder 2 to drive the upper cutting die 8 to quickly close the mold with the lower cutting die 9 after the advance and retreat workbench 6 slides to the fixed platform 11, thereby realizing synchronous shearing of the four sides of the door liner; this synchronous shearing method greatly shortens the trimming time and improves production efficiency.

[0071] In the floating platform 93 of the lower cutting die 9, the annular step-shaped groove formed between the cutting knife 94 and the positioning plate 95 can be used to position the omega groove of the refrigerator door liner, ensuring the stability and precise positioning of the door liner during the cutting process.

[0072] The stainless steel sheet 83 in the upper die 8 has excellent wear resistance and corrosion resistance, can resist the wear and corrosion during the long-term trimming process, and prolongs the service life of the upper die 8. At the same time, the stainless steel material also ensures the flatness and smoothness of the trimming.

[0073] The backing plate 1 82 of the upper cutting die 8 and the backing plate 2 92 of the lower cutting die 9 both adopt an integrated fixed connection structure, which increases the overall structural strength of the mold and makes it less likely to be deformed or damaged during the shearing process.

[0074] Preferably, the pad 1 82 of the upper cutting mold 8 and the pad 2 92 of the lower cutting mold 9 can be reasonably selected according to the number of refrigerator liners generated by the foaming mold (such as double-packed door liners, triple-packed door liners, quadruple-packed door liners, etc.), thereby selecting different upper cutting molds 8 and lower cutting molds 9.

[0075] like Figure 11 to Figure 15As shown, the bottom edge of the floating platform 93 is provided with an annular groove 931 in the circumferential direction, and a plurality of springs 932 are evenly distributed vertically in the annular groove 931. The bottom ends of the plurality of springs 932 are horizontally and vertically connected with a mounting plate 934, and the bottom surface of the mounting plate 934 is in contact with the top surface of the second pad 92; the bottom surface of the floating platform 93 is vertically fixed with a square ring-shaped skirt plate 933 along the outer edge of the annular groove 931, and the inner bottom edge of the skirt plate 933 is sleeved with a gap with the top edge of the mounting plate 934;

[0076] A cross protrusion 935 is vertically fixed to the middle of the bottom surface of the mounting plate 934, and a cross groove 921 is provided inwardly on the top surface of the pad 92 for concentrically placing the cross protrusion 935. Square grooves 922 are symmetrically provided on both sides of the end of the cross groove 921, and an elastic component 923 is provided in each of the square grooves 922. The elastic components 923 opposite to each other are used to clamp the ends of the corresponding cross protrusions 935.

[0077] By adopting the above technical solution, the specific floating structure set on the floating platform 93 can enable it to be fine-tuned in the up and down, front and back, left and right directions, so that the lower cutting mold 9 can adaptively adjust the shearing position according to the slight deviation of the actual shape of the door liner after foaming, so that the omega grooves of the double or multi-packed door liner can be smoothly inserted between the cutter 94 and the positioning plate 95 in the corresponding floating platform 93, thereby ensuring the accuracy of edge cutting.

[0078] The floating platform 93 is connected to the mounting plate 934 through a plurality of springs 932 in an annular groove 931 circumferentially arranged along the edge of its bottom surface. This structural design enables the floating platform 93 to produce a certain degree of floating or elastic displacement when pressed down by the upper cutting die 8, so as to ensure that the cutting edge of the cutting knife 94 is always in close fit with the four sides of the door liner, thereby achieving precise and uniform shearing effect.

[0079] By setting a cross groove 921 on the top surface of the pad 92 to cooperate with the cross protrusion 935 at the bottom of the floating platform 93, and assisted by the elastic component 923 in the square groove 922 for clamping, this structure can not only maintain the positioning and clamping of the floating platform 93, but also enable the floating platform 93 to move forward and backward, left and right under manual push, and can quickly reset after the manual thrust is cancelled.

[0080] The design of the skirt plate 933 of the floating platform 93 can not only play a guiding role, but also prevent the spring 932 from bending and causing the floating platform 93 to tilt when the floating platform 93 moves forward, backward, left, and right.

[0081] like Fig.14 and Fig.15As shown, the elastic component 923 includes at least two guide rods 9231 that pass through the inner wall of the corresponding square groove 922 with vertical relative gaps, and a rectangular baffle 9232 is vertically connected between the inner end faces of the two guide rods 9231; the outer end face of the guide rod 9231 is axially connected to a top spring 9233 that is vertically fixed on the outer wall of the corresponding square groove 922; the baffle 9232 is kept in close contact with the end side of the corresponding cross protrusion 935 under the elastic force of the top spring 9233.

[0082] By adopting the above technical solution, the elastic component 923, through the combination of the guide rod 9231 and the top spring 9233, can achieve accurate positioning and stable clamping of the end of the cross protrusion 935, while not hindering the cross protrusion 935 from being able to move forward and backward or left and right to a certain extent under the action of external force, and quickly reset after the external force disappears; during this period, the top spring 9233 is always in a contracted state.

[0083] Embodiment 4

[0084] Combination Figure 1 , Figure 3 to Figure 5 as well as Fig. 9 and Fig.10 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0085] In this embodiment, if Figure 1 , Fig. 9 and Fig.10 As shown, a U-shaped positioning groove 911 is symmetrically provided along the midline of the inner edge of the bottom plate 91 of the lower cutting die 9, and a positioning hole 912 is symmetrically provided along the midline of the outer edge; the positioning groove 911 is snap-fitted with a positioning pin 61 correspondingly connected vertically to the top surface of the advance and retreat workbench 6, and the positioning hole 912 is snap-fitted with a positioning pin 62 correspondingly connected vertically to the top surface of the advance and retreat workbench 6; wedge blocks 63 are vertically symmetrically provided at both ends of the top surface of the advance and retreat workbench 6 along its long axis.

[0086] By adopting the above technical solution, after the lower cutting die 9 is hoisted from top to bottom to the top of the advance and retreat workbench 6, it is guided by the wedge blocks 63 on both sides, and firstly manually assisted adjustment is used to make the positioning groove 911 on one side of the bottom plate 91 laterally engage with the corresponding positioning pin 1 61, and then the positioning hole 2 912 on the other side is axially engaged with the corresponding positioning pin 2 62, so as to complete the positioning of the entire lower cutting die 9.

[0087] The positioning groove 911 is snap-fitted with the positioning pin 1 61, and the positioning hole 2 912 is snap-fitted with the positioning pin 2 62, thereby ensuring the precise positioning of the lower cutting die 9 on the advance and retreat workbench 6, preventing inaccurate cutting or mold damage due to position offset during the cutting process, further enhancing the stability of the lower cutting die 9 in the horizontal direction, and ensuring the accuracy of the cutting operation.

[0088] Preferably, positioning holes 811 are symmetrically provided at both ends of the bottom plate 81 of the upper cutting die 8 along its axis, and the positioning holes 811 are snap-fitted with corresponding positioning pins 3 (not shown in the figure) vertically connected to the bottom surface of the upper mold frame 3; this can prevent the upper cutting die 8 and the lower cutting die 9 from deviating when the mold is closed.

[0089] like Figure 3 and Figure 5 As shown, a plurality of lifting cylinders 7 arranged in a matrix are provided in the middle of the frame 2 5, and the top end of the piston rod of each of the lifting cylinders 7 is axially and vertically connected to a round support platform 71, and three ball seats 72 arranged in a triangle are fixedly connected to the top surface of the round support platform 71, and a universal ball 73 is embedded in the middle of the top surface of each ball seat 72; when the advance and retreat workbench 6 is stationary on the top surface of the frame 2 5, the lifting cylinder 7 pushes the round support platform 71 through the gap corresponding to the circular hole 64 opened on the advance and retreat workbench 6.

[0090] By adopting the above technical scheme, the lifting cylinder 7 cooperates with the structure of the universal ball 73, so that the lower cutting die 9 can be pushed out of the positioning pin 1 61 and the positioning pin 2 62 when replacing the old die, so as to facilitate the rapid lifting and replacement of the old die, and when replacing the new die, the lower cutting die 9 can be first lifted onto the universal ball 73 that has extended out of the round hole 64, and then the position of the lower cutting die 9 can be manually adjusted by rolling the universal ball 73, so as to better complete the clamping of the positioning groove 911 on the lower cutting die 9 and the positioning pin 1 61, and the positioning hole 2 912 and the positioning pin 2 62, so that the lower cutting die 9 can be quickly positioned on the advance and retreat workbench 6.

[0091] When it is necessary to slide the advance and retreat workbench 6 from the top surface of the frame 2 5 to the top surface of the fixed platform 11 for trimming operation, the piston rod of the jacking cylinder 7 can be retracted in time, so that the universal ball 73 falls below the circular hole 64 of the advance and retreat workbench 6, so that the advance and retreat workbench 6 can successfully complete the advance and retreat work.

[0092] Since three ball seats 72 arranged in a triangle are fixedly connected to the top surface of the circular support platform 71, and a universal ball 73 is embedded in each ball seat 72, this layout ensures uniform distribution of supporting force and avoids damage or deformation of the bottom plate 91 in the lower cutting mold 9 due to excessive force at a single point.

[0093] The working principle and use process of the present invention:

[0094] When the present invention is in use, first, the lower cutting die 9 is clamped on the advance and retreat workbench 6, and the door liner is placed in the lower cutting die 9. At this time, the advance and retreat workbench 6 is in the first working state and is stationary on the top surface of the frame 2 5; then, the sprocket chain 52 is driven by the servo motor 54 to drive the advance and retreat workbench 6 to slide along the linear guide pair 51 to the top surface of the fixed platform 11 and enter the second working state; after the advance and retreat workbench 6 is in place, the hydraulic cylinder 2 is started to drive the upper mold frame 3 and the upper cutting die 8 fixed thereon to descend.

[0095] The upper die 8 is firmly clamped by the end locking die set 41 and the side locking die set 42 in the clamping mechanism 4 to ensure stability during the shearing process. When the upper die 8 is closed with the lower die 9, the floating platform 93 is finely adjusted under the action of the spring 932 to ensure that the cutter 94 is closely fitted with the edge of the door liner during shearing.

[0096] At this time, the upper cutting die 8 and the lower cutting die 9 synchronously cut the four sides of the door liner to complete the trimming operation. After the trimming is completed, the hydraulic cylinder 2 drives the upper die frame 3 and the upper cutting die 8 to rise and reset; then, the servo motor 54 drives the sprocket chain 52 in the reverse direction, driving the advance and retreat workbench 6 to return to the top surface of the frame 2 5 along the linear guide pair 51 to prepare for the next trimming operation. During the whole process, the limit mechanism 22 ensures the stability and safety of the upper die frame 3 during the lifting process through the sliding cooperation of the lifting column 223 and the guide block 226.

[0097] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of trimming mechanism for a door liner forming machine, characterized in that: The invention comprises a frame (1), wherein a fixed platform (11) is horizontally arranged on the top surface of the frame (1), hydraulic cylinders (2) are vertically and symmetrically arranged at both ends of the top surface of the fixed platform (11), an upper mold frame (3) is horizontally and vertically arranged between the piston rods of the two hydraulic cylinders (2), an upper cutting mold (8) is attached to the middle part of the bottom surface of the upper mold frame (3), and the upper cutting mold (8) is clamped and fixed by a locking mechanism (4) arranged around its outer periphery; a frame (5) is arranged opposite to the frame (1), and an advance and retreat workbench (6) is horizontally slidably arranged on the top surface of the frame (5) along its short side, and the bottom surface of the advance and retreat workbench (6) is flush with the top surface of the fixed platform (11), and a lower cutting mold (9) is placed at a fixed position in the middle part of its top surface; The advance-retract workbench (6) is divided into a first working state and a second working state. When in the first working state, the advance-retract workbench (6) is stationary on the top surface of the frame 2 (5), and a door liner that matches it is clamped in the lower cutting die (9); when in the second working state, the advance-retract workbench (6) is slid onto the top surface of the fixed platform (11), and the upper cutting die (8) is driven downward by the hydraulic cylinder (2) to close the mold with the lower cutting die (9) to complete the synchronous shearing of the four sides of the door liner.

2. According to claim 1, a new type of trimming mechanism for a door liner forming machine is characterized in that: The mold locking mechanism (4) comprises four end locking mold groups (41) symmetrically distributed in pairs along the short side direction of the bottom surface of the upper mold frame (3), and two side locking mold groups (42) symmetrically distributed along the long side direction of the bottom surface of the upper mold frame (3); The end locking die set (41) comprises a guide support groove (411) with an open end, the top surface of the guide support groove (411) is fixedly connected to the bottom surface of the upper die frame (3), a locking tongue (413) with a step-shaped structure is arranged in the guide support groove (411) for transverse sliding cooperation, and the inner end of the locking tongue (413) is drivingly connected to the piston rod of a cylinder (412) vertically fixed to the closed end of the guide support groove (411); The side locking mold assembly (42) comprises a long strip plate (421), and a plurality of inverted U-shaped support frames (422) are vertically arranged at equal intervals on the top surface of the long strip plate (421), and the top surface of the support frame (422) is fixedly connected to the bottom surface of the upper mold frame (3); a second locking tongue (423) is rotatably connected inside the support frame (422), and the inner and outer ends of the second locking tongue (423) are respectively and integrally connected to an arc-shaped pressure strip (4232) and an arc-shaped rack (4231); a plurality of L-shaped guide support rails (424) are vertically suspended at equal intervals on the outer side surface of the long strip plate (421), and each guide support rail ( 424) are arranged opposite to the corresponding locking tongue 2 (423), and a linkage rod (425) is arranged between the vertical parts of the multiple guide rails (424) for horizontal sliding and clamping cooperation, and a plurality of spur racks (4251) are fixedly connected horizontally and vertically at equal intervals on the inner facade of the linkage rod (425), and each spur rack (4251) is meshedly connected with the arc-shaped rack (4231) corresponding to the locking tongue 2 (423); a cylinder 2 (426) is suspended horizontally on the outer side of the long strip (421), and the piston rod of the cylinder 2 (426) is linked to the outer facade of the linkage rod (425).

3. According to the novel trimming mechanism of the door liner forming machine as claimed in claim 1, it is characterized by: The upper cutting die (8) comprises a bottom plate (81), and the bottom plate (81) is fixed to the bottom surface of the upper die frame (3) through the clamping mechanism (4); at least one square ring-shaped pad (82) is integrally fixedly connected to the middle of the bottom surface of the bottom plate (81), and a stainless steel thin plate (83) matching with the pad (82) is fixedly attached to the top surface of the pad (82); The lower cutting die (9) comprises a bottom plate 2 (91) fixedly placed on the top surface of the advance and retreat workbench (6); a backing plate 2 (92) vertically opposite to the backing plate 1 (82) is integrally fixedly connected to the middle of the top surface of the bottom plate 2 (91); a floating platform (93) matched therewith is arranged on the top surface of the backing plate 2 (92); a square groove is opened inwardly in the middle of the top surface of the floating platform (93); a square ring-shaped cutting knife (94) is fixedly attached to the inner side wall of the square groove in a circumferential direction, and the top cutting edge of the cutting knife (94) extends to the outside of the floating platform (93); a square ring-shaped positioning plate (95) is sleeved in the middle of the inner part of the cutting knife (94).

4. A novel trimming mechanism for a door liner forming machine according to claim 3, characterized in that: The bottom edge of the floating platform (93) is provided with an annular groove (931) in the circumferential direction, and a plurality of springs (932) are evenly distributed vertically in the annular groove (931). The bottom ends of the plurality of springs (932) are horizontally and vertically connected with a mounting plate (934), and the bottom surface of the mounting plate (934) is in contact with the top surface of the second pad (92); the bottom surface of the floating platform (93) is vertically fixed with a square ring-shaped skirt plate (933) along the outer edge of the annular groove (931), and the inner bottom edge of the skirt plate (933) is sleeved with a gap with the top edge of the mounting plate (934); A cross protrusion (935) is vertically fixed to the middle of the bottom surface of the mounting plate (934), and a cross groove (921) for concentrically placing the cross protrusion (935) is provided inwardly on the top surface of the second pad (92), and square grooves (922) are symmetrically provided on both sides of the end of the cross groove (921), and an elastic component (923) is provided in each of the square grooves (922), and the elastic components (923) facing each other are used to clamp the ends of the corresponding cross protrusions (935).

5. A novel trimming mechanism for a door liner forming machine according to claim 4, characterized in that: The elastic component (923) comprises at least two guide rods (9231) which pass through the inner side wall of the corresponding square groove (922) with vertical relative gaps, and a rectangular baffle (9232) is vertically connected between the inner end surfaces of the two guide rods (9231); the outer end surface of the guide rod (9231) is axially connected to a top spring (9233) vertically fixed on the outer side wall of the corresponding square groove (922); the baffle (9232) is kept in close contact with the end side surface of the corresponding cross protrusion (935) under the elastic force of the top spring (9233).

6. According to claim 3, a new type of trimming mechanism for a door liner forming machine is characterized in that: A U-shaped positioning groove (911) is symmetrically provided along the inner edge of the bottom plate (91) of the lower cutting die (9), and a positioning hole (912) is symmetrically provided along the outer edge of the bottom plate (91); the positioning groove (911) is snap-fitted with a corresponding positioning pin (61) vertically connected to the top surface of the advance and retreat workbench (6), and the positioning hole (912) is snap-fitted with a corresponding positioning pin (62) vertically connected to the top surface of the advance and retreat workbench (6); wedge blocks (63) are vertically symmetrically provided at both ends of the top surface of the advance and retreat workbench (6) along its long axis.

7. A novel trimming mechanism for a door liner forming machine according to claim 6, characterized in that: A plurality of lifting cylinders (7) arranged in a matrix are provided in the middle of the frame two (5); the top end of the piston rod of each lifting cylinder (7) is axially and vertically connected to a round support platform (71); the top surface of the round support platform (71) is fixedly connected to three ball seats (72) arranged in a triangle; a universal ball (73) is embedded in the middle of the top surface of each ball seat (72); when the advance and retreat workbench (6) is stationary on the top surface of the frame two (5), the lifting cylinder (7) pushes the round support platform (71) through the gap through the corresponding circular hole (64) opened on the advance and retreat workbench (6).

8. The novel trimming mechanism of the door liner forming machine according to claim 1 is characterized by: The outer side ends of the advance and retreat workbench (6) are respectively connected to the linear guide rail pairs (51) symmetrically arranged on the short edges of the top surface of the frame two (5); the short sides of the top of the frame two (5) are respectively symmetrically arranged with sprocket chains (52), and the sprocket chains (52) are driven by a servo motor (54) arranged on the frame two (5); the outer side ends of the advance and retreat workbench (6) and the corresponding sprocket chains (52) are bridged and linked through a connecting block (53) adapted thereto.

9. The novel trimming mechanism of the door liner forming machine according to claim 1 is characterized by: Four-link guide columns (21) which can be raised and lowered synchronously with the upper mold frame (3) are vertically symmetrically provided at the ends of the fixed platform (11) along the corresponding hydraulic cylinders (2).

10. A novel trimming mechanism for a door liner forming machine according to claim 9, characterized in that: The top surface of the end of the fixed platform (11) is symmetrically provided with a limit mechanism (22) along the longitudinal direction of the corresponding hydraulic cylinder (2), and the limit mechanism (22) is located on the outside of the corresponding four-link guide column (21); The limiting mechanism (22) comprises a rotating drum (221) rotatably connected to the fixed platform (11); the rotating drum (221) is driven by a worm gear (222) sleeved therewith to realize positioning rotation; a lifting column (223) is screwed in the rotating drum (221); a guide block (226) is horizontally and vertically connected to the bottom end of the lifting column (223); one end of the guide block (226) is longitudinally slidably engaged with a slide rail (225) vertically connected to the bottom surface of the fixed platform (11); and a limiting sleeve (224) is axially sleeved on the top of the lifting column (223).

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