Mold frame mold closing mechanism based on annular refrigerator door body foaming line

Abstract

The invention relates to a mold frame clamping mechanism based on an annular refrigerator door body foaming line, which comprises a mold frame on the annular refrigerator door body foaming line, a side frame of the foaming line is provided with a jacking track, a clamping mechanism and a material injection gun are supported on the jacking track, the jacking track can realize immediate clamping along with the mold frame through the jacking track, and the jacking track comprises an uphill section and a downhill section. A mold closing section is connected between the mold clamping sections; the mold frame comprises a lower mold supported by the bottom frame, an upper mold covers the mold frame oppositely, the upper mold and the lower mold can rotate to open and close along the edge opposite to the jacking track, the side parts of the upper mold and the lower mold are respectively provided with an upper roller and a lower roller in parallel, the horizontal height of the lower roller is flush with that of the jacking track, and a swing mechanism is arranged between the end part of the lower mold and the bottom frame; the mold closing mechanism comprises a bent-knife-shaped mold closing beam which is vertically arranged at the rear part of the jacking rail, a sliding clamp is arranged in the mold closing beam, and the upper mold can be pulled to turn downwards for mold closing; the mold closing action is directly completed through track physical guidance, complex coordination of a sensor and a control system is omitted, and the mold closing time is remarkably shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerator foaming lines, and in particular relates to a mold frame clamping mechanism based on an annular refrigerator door foaming line. Background Art

[0002] In the refrigerator manufacturing process, the foaming process of the refrigerator door is a key link to ensure the thermal insulation performance of the door. The traditional refrigerator door foaming process usually relies on a robot to perform mold closing operations to ensure that the foaming material is evenly filled and solidified in the closed mold cavity. However, the existing mold closing method has certain limitations in practical applications, mainly manifested in the complicated mold closing process and the high cost of automation equipment.

[0003] First, the traditional refrigerator door foaming process usually uses independent mold clamping equipment, which needs to accurately position the mold frame at the foaming station and complete the closing of the upper and lower molds through multiple manipulators. Although this method can ensure the accuracy of mold clamping, due to the complex control of the manipulator, additional sensors, drive devices and control systems are often required to coordinate the actions of each link, resulting in increased complexity of the entire process. In addition, during the production process, the manipulator needs to perform multiple start-stop, grab, position and press operations. Each step requires precise time control and position adjustment. Once a certain link deviates, it may cause the mold to be not closed tightly or the mold closing time to be delayed, thereby affecting the foaming effect and product quality. Secondly, the procurement and maintenance costs of automated mold clamping equipment are high, which brings a great economic burden to enterprises. Automation equipment such as manipulators usually require high-precision actuators such as servo motors and are equipped with corresponding control systems to ensure the stability and repeatability of the mold clamping action. The procurement cost of these equipment is high, and during long-term operation, the driving components of the manipulator are prone to wear and tear, requiring regular maintenance and replacement of parts, further increasing the operating costs of the enterprise. In addition, in order to adapt to refrigerator doors of different specifications, automated mold clamping equipment usually requires complex program settings and parameter adjustments, which increases the difficulty of operation and debugging and reduces production efficiency. Therefore, the existing refrigerator door foaming mold clamping method has brought challenges to the company's production efficiency and cost control due to its complex process, high equipment cost and limited production stability. Therefore, how to optimize the mold clamping process, simplify the mold clamping operation process, reduce equipment costs, and improve the automation level of the production line has become an urgent problem to be solved in the industry. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a mold frame clamping mechanism based on a ring-shaped refrigerator door foaming line, and the specific technical scheme is as follows:

[0005] The present invention provides a mold clamping mechanism for a mold frame based on an annular refrigerator door body foaming line, including a mold frame on the annular refrigerator door body foaming line. A jacking track is arranged on the side of the foaming line, and a mold clamping mechanism and a feeding gun are supported thereon. The mold can be instantaneously clamped through the jacking track. The jacking track includes an uphill section and a downhill section, and a mold clamping section is connected therebetween.

[0006] The mold frame includes a lower mold supported by a bottom frame, and an upper mold is oppositely covered. The upper mold and the lower mold can be opened and closed by rotating along the edge of the back jacking track. Upper rollers and lower rollers are respectively arranged in parallel on the sides thereof. The horizontal height of the lower rollers is flush with the jacking track, and the inclination of the lower mold can be instantaneously changed by sliding along the jacking track as the mold frame moves. A swinging mechanism is arranged between the end of the lower mold and the bottom frame to reduce the jitter during the flipping of the lower mold.

[0007] The mold clamping mechanism includes a scimitar-shaped mold clamping beam erected at the rear of the jacking track, and a sliding clamp is arranged therein to instantaneously pull the upper mold to flip down for mold clamping.

[0008] As a preferred technical solution of the present invention, the swinging mechanism includes a rotatable H-shaped swinging frame hinged to the edge of the lower mold. A limiting shaft is inserted at the bottom thereof, and a crab-claw-shaped limiting seat is supported at the end of the bottom frame. A slot adapted to the limiting shaft is opened thereon, and the horizontal position of the lower mold can be instantaneously locked by swinging back and forth and falling into the slot as the swinging frame slides into the uphill section along with the lower mold.

[0009] As a preferred technical solution of the present invention, a limiting mechanism is suspended at the bottom of the lower mold. It includes a suspension fixed to the bottom wall of the lower mold. The suspension longitudinally extends forward to be provided with an L-shaped seat. A limiting spring that can move up and down is vertically sleeved therein. The limiting spring extends downward through the L-shaped seat, and a through hole is left on the upper end of the lower mold. When the lower mold is lifted, the excessive swinging of the swinging frame can be restricted for the precise alignment of the swinging frame. When the door shell falls into the lower mold, the swinging frame presses against the limiting spring and moves up, and can be deformed locally along with the door shell placed therein for eliminating the anti-vibration during the mold clamping of the mold frame.

[0010] As a preferred technical solution of the present invention, bearings are embedded in the upper rollers and the lower rollers, and they can rotate and roll to reduce jitter.

[0011] As a preferred technical solution of the present invention, the mold clamping mechanism includes transmission wheels rotatably arranged at the head and tail ends of the hollow mold clamping beam. A rotary chain is sleeved along the edge of the mold clamping beam between the transmission wheels. A mold clamping motor is inserted into the axis of the head transmission wheel to drive the rotation. An inverted V-shaped sliding clamp is clamped on the rotary chain, and a pair of clamping shafts for opposite clamping are arranged at the clamp ends, and the upper rollers can be driven to move to realize the directional clamping of the upper mold as the transmission wheels rotate.

[0012] As a preferred technical solution of the present invention, a tensioning wheel is attached to the coaxial side of the clamping beam of the tail-end driving wheel. It includes a pulley connected through the beam with the axis of the driving wheel. On both sides of the pulley, L-shaped fixing frames are symmetrically fixed vertically. The outer periphery of the pulley is movably embedded with the fixing frames, and a locking anchor is fixedly arranged above the pulley. A columnar adjusting bolt extending from the top of the pulley is inserted inside it, and the center distance between the driving wheels can be slidably adjusted by the adjusting bolt to achieve instant tensioning of the rotary chain.

[0013] As a preferred technical solution of the present invention, a jump slope section is arranged between the uphill section and the clamping section of the jacking track. The lower roller is lifted horizontally by the uphill section of the track and jumps upward through the jump slope section, and can swing the swing frame to accurately fall into the limit seat to complete the horizontal position locking.

[0014] As a preferred technical solution of the present invention, the injection gun is arranged between the uphill section and the clamping mechanism, and can cooperate with the jump slope section to complete instant injection when the lower mold is horizontal.

[0015] As a preferred technical solution of the present invention, the clamping shaft is clamped and locked by bolts and can be individually replaced according to the size of the upper roller.

[0016] As a preferred technical solution of the present invention, a plurality of sequentially connected guide plates are supported on the edge of the clamping beam and can be instantaneously guided as the rotary chain rotates.

[0017] As a preferred technical solution of the present invention, the starting position of the sliding clamp can be adjusted along the track of the clamping beam to adapt to the flipping traction of the upper mold.

[0018] The beneficial effects of the present invention are:

[0019] 1. Simplify the clamping process and improve efficiency: Through the design of the uphill section, clamping section and downhill section of the jacking track, combined with the function of the lower roller of the mold frame sliding along the track, the automatic adjustment of the inclination of the lower mold during the movement of the mold frame is realized. Compared with the traditional manipulator that needs to be positioned and grabbed multiple times, this design directly completes the clamping action through the physical guidance of the track, eliminating the complex coordination link between the sensor and the control system, and significantly shortening the clamping time. For example, the sliding clamp in the scimitar-shaped clamping beam can instantaneously pull the upper mold to flip, without the need for the manipulator to repeatedly align, reducing the risk of process interruption.

[0020] 2. Reduce equipment costs and maintenance difficulties: Traditional clamping relies on high-precision servo motors or hydraulic systems, while this mechanism adopts a mechanical track and roller linkage structure, and reduces the jitter of the lower mold through the swing mechanism. This pure mechanical design avoids the procurement requirements of expensive automation equipment (such as manipulators, hydraulic cylinders), and at the same time reduces the use of vulnerable parts, reducing the long-term maintenance cost. For example, the cooperation between the lower roller and the jacking track only requires regular lubrication maintenance, without the need to frequently replace precision drive components.

[0021] 3. Enhance production stability and environmental adaptability: The rigid structure of the lifting track and the fixed clamping position in the clamping section ensure the repetitive accuracy of the clamping action, avoiding the execution deviation caused by the change of environmental temperature and humidity in traditional manipulators. The swinging mechanism further suppresses the flipping jitter, making the filling of foaming materials more uniform. In addition, the characteristic of the mold base moving continuously along the track is naturally synchronized with the production line rhythm, avoiding the production stagnation problem that may be caused by traditional independent clamping equipment.

[0022] 4. Improve process compatibility and operation convenience: By adjusting the slope of the lifting track and the length of the clamping section, the mold size of different specifications of door bodies can be adapted without complex program resetting. Operators only need to adjust the physical parameters to achieve multi-model production, significantly reducing the debugging difficulty and time cost, meeting the requirements of flexible manufacturing. Description of the Drawings

[0023] Figure 1 Shows the overall structural schematic diagram of the present invention;

[0024] Figure 2 Shows the three-dimensional structural schematic diagram of the mold base in the present invention;

[0025] Figure 3 Shows the back structural schematic diagram of the mold base in the present invention;

[0026] Figure 4 Shows the front view of the mold base in the present invention;

[0027] Figure 5 Shows the front view of the present invention;

[0028] Figure 6 Shows the three-dimensional structural schematic diagram of the clamping mechanism in the present invention;

[0029] Figure 7 Shows the structural schematic diagram of the combination of the mold base and the lifting track in the present invention;

[0030] Figure 8 Shows the structural schematic diagram of the combination of the mold base and the clamping mechanism in the present invention;

[0031] Figure 9 Shows Figure 6 the enlarged view of part A in

[0032] Figure 10 Shows the three-dimensional structural schematic diagram of the limit mechanism in the present invention;

[0033] As shown in the figure: 1. Jacking track; 11. Uphill section; 12. Downhill section; 13. Skip section; 14. Die closing section; 2. Die set; 21. Upper die; 211. Upper roller; 22. Lower die; 221. Lower roller; 23. Underframe; 24. Swing mechanism; 241. Limit seat; 242. Limit shaft; 243. Swing frame; 25. Limit mechanism; 251. Suspension; 252. L-shaped seat; 253. Limit spring; 3. Die closing mechanism; 31. Die closing beam; 311. Guide plate; 32. Die closing motor; 33. Tensioning wheel; 331. Fixed frame; 332. Pulley; 333. Locking anchor; 334. Adjusting bolt; 34. Driving wheel; 35. Rotary chain; 36. Sliding clamp; 361. Clamping shaft; 4. Injection gun. Detailed implementation mode

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further details the present invention in conjunction with 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.

[0035] Embodiment 1

[0036] To solve the technical problems in the background art, the following die set 2 and die closing mechanism 3 based on the annular refrigerator door body foaming line are provided:

[0037] Combined with Figures 1-8 As shown, the die set 2 and die closing mechanism 3 based on the annular refrigerator door body foaming line include the die set 2 on the annular refrigerator door body foaming line. A jacking track 1 is provided on the side of the foaming line, and a die closing mechanism 3 and an injection gun 4 are supported thereon. The die set 2 can be instantaneously closed with the die closing mechanism 3 through the jacking track 1. The jacking track 1 includes an uphill section 11 and a downhill section 12, and a die closing section 14 is connected therebetween;

[0038] The die set 2 includes a lower die 22 supported by an underframe 23, and an upper die 21 is oppositely covered thereon. The upper die 21 and the lower die 22 can be rotated and opened and closed along the edge of the jacking track 1 in the opposite direction. Upper rollers 211 and lower rollers 221 are respectively provided in parallel on the sides thereof. The horizontal height of the lower rollers 221 is flush with the jacking track 1, and the inclination of the lower die 22 can be instantaneously changed by sliding along the jacking track 1 as the die set 2 moves. A swing mechanism 24 is provided between the end of the lower die 22 and the underframe 23 to reduce the jitter of the lower die 22 during flipping;

[0039] The die closing mechanism 3 includes a scimitar-shaped die closing beam 31 erected at the rear of the jacking track 1, and a sliding clamp 36 is provided therein to instantaneously pull the upper die 21 to flip downward for die closing.

[0040] Please refer to the attached instructions Figures 1-8The present invention provides a first embodiment of a mold frame 2 clamping mechanism 3 based on a ring-shaped refrigerator door foaming line. In this embodiment, the mold frame 2 clamping mechanism 3 includes a mold frame 2 installed on the ring-shaped refrigerator door foaming line, and the mold frame 2 is composed of a lower mold 22 supported by a base frame 23 and an upper mold 21 oppositely covered, and the upper mold 21 and the lower mold 22 can be opened and closed by rotating along the edge of the back-facing jacking track 1. A jacking track 1 is provided on the side of the foaming line, and a clamping mechanism 3 and an injection gun 4 are supported on the jacking track 1, which can realize instant clamping with the mold frame 2 through the jacking track 1. The jacking track 1 includes an uphill section 11, a downhill section 12 and a clamping section 14 connecting the two. When the mold frame 2 moves on the jacking track 1, its inclination angle can change with the shape of the track.

[0041] The upper mold 21 and the lower mold 22 of the mold frame 2 are parallelly provided with an upper roller 211 and a lower roller 221, wherein the horizontal height of the lower roller 221 is flush with the jacking track 1, so that when the mold frame 2 moves along the jacking track 1, the lower roller 221 can slide on the track, thereby instantly adjusting the inclination of the lower mold 22. In order to reduce the shaking of the lower mold 22 when it turns over, a swing mechanism 24 is provided between the end of the lower mold 22 and the bottom frame 23, and the swing mechanism 24 can play a stabilizing role in limiting the turning of the lower mold 22, ensuring its smooth operation during the movement.

[0042] In this embodiment, the mold clamping mechanism 3 includes a scimitar-shaped mold clamping beam 31 erected at the rear of the jacking track 1, and a sliding clamp 36 is provided inside the mold clamping beam 31. The sliding clamp 36 can instantly pull the upper mold 21 to flip downward to achieve the mold clamping operation. When the mold frame 2 moves along the jacking track 1 to the mold clamping section 14, the sliding clamp 36 contacts the upper mold 21 and pushes the upper mold 21 to flip downward through the pulling action, so that the upper mold 21 and the lower mold 22 are closed to complete the mold clamping process. After the mold clamping is completed, the injection operation can be performed through the injection gun 4 to ensure the smooth progress of the foaming process.

[0043] Furthermore, in order to ensure the smooth movement of the mold frame 2 on the lifting track 1, the uphill section 11 and the downhill section 12 of the lifting track 1 are both provided with appropriate inclination angles, so that the mold frame 2 can smoothly transition to the mold closing section 14 during the movement. While the mold frame 2 stays in the mold closing section 14, the mold closing is completed by the sliding clamp 36, and after the foaming process is completed, it continues to move along the downhill section 12 to the next process link. The entire mold closing process can be automatically completed with the movement of the mold frame 2, thereby improving the degree of automation of the production line.

[0044] In addition, in order to further improve the stability of the mold clamping mechanism 3, in this embodiment, the traction structure of the sliding clamp 36 adopts a mechanical linkage method, so that it can provide uniform traction when pulling the upper mold 21 to flip, avoiding loose mold clamping or misalignment caused by uneven force. The movement trajectory of the sliding clamp 36 matches the flipping path of the upper mold 21, ensuring that no additional resistance is generated during the traction process, thereby improving the mold clamping efficiency.

[0045] In summary, this embodiment realizes instant mold closing of the mold frame 2 by setting a lifting track 1 on the foaming line and combining a scimitar-shaped mold closing beam 31 and a sliding clamp 36. At the same time, a swing mechanism 24 is used to reduce the shaking of the lower mold 22 when it is flipped, thereby ensuring the stability of the mold closing process.

[0046] Embodiment 2

[0047] like Figures 2-5 and Figure 10 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0048] In this embodiment, the swing mechanism 24 includes a rotatable H-shaped swing frame 243 hinged on the edge of the lower mold 22, a limiting shaft 242 is inserted at the bottom thereof, and a crab claw-shaped limiting seat 241 is supported at the end of the base frame 23, on which a groove adapted to the limiting shaft 242 is opened. The swing frame 243 can swing back and forth as the lower mold 22 slides into the uphill section 11 and falls into the groove to instantly lock the horizontal position of the lower mold 22.

[0049] The upper roller 211 and the lower roller 221 are embedded with bearings and can rotate and roll to reduce shaking.

[0050] A jump slope section 13 is provided between the uphill section 11 and the mold closing section 14 of the jacking track 1. The lower roller 221 lifts the lower mold 22 to a horizontal level through the uphill section 11, and jumps upward through the jump slope section 13, so that the swing frame 243 can be swung to accurately fall into the limit seat 241 to complete horizontal position locking.

[0051] A limiting mechanism 25 is suspended at the bottom of the lower mold 22, which includes a suspension 251 fixed to the bottom wall of the lower mold 22. The suspension 251 is longitudinally extended to the front end and is provided with an L-shaped seat 252, in which a limiting spring 253 that can move up and down is vertically sleeved. The limiting spring 253 extends downward through the L-shaped seat 252, and a through hole is left in the upper end of the lower mold 22. The lifting of the lower mold 22 can limit the excessive swinging of the swing frame 243, which is used for precise positioning of the swing frame 243. The door shell falls into the lower mold 22, and the swing frame 243 moves upward against the limiting spring 253, which can be partially deformed with the door shell placed therein, and is used to eliminate the back shock of the mold frame 2.

[0052] Please refer to the instruction manual Figures 2-5 and Figure 10, in this embodiment, the present invention provides a second embodiment applicable to the mold base 2 system. In this implementation manner, in order to achieve precise positioning and stable locking of the lower mold 22 during the mold closing process, a structural design in which a swinging mechanism 24 cooperates with a limiting mechanism 25 is provided. The swinging mechanism 24 includes an H-shaped rotatable swinging frame 243 hinged and installed at the edge of the lower mold 22. The swinging frame 243 is connected to the lower mold 22 through a hinge structure and can swing back and forth around the hinge point within a certain range. A limiting shaft 242 is inserted at the bottom of the swinging frame 243, and the limiting shaft 242 plays a role of guiding and positioning during the swinging process. A crab-claw-shaped limiting seat 241 is provided at the bottom of the swinging frame 243. The limiting seat 241 has a symmetrically open structure, and a slot matching the limiting shaft 242 is opened inside it. When the swinging frame 243 swings to a certain position during the lifting of the lower mold 22, the limiting shaft 242 can accurately fall into this slot, thereby realizing the instant locking of the horizontal position of the lower mold 22.

[0053] To cooperate with the action process of the swinging mechanism 24, a set of upper rollers 211 and lower rollers 221 embedded with bearings are provided. The upper and lower rollers 221 are in contact with the track respectively during the operation of the mold base 2 and can rotate and roll, thereby effectively reducing the jitter caused by rolling friction and improving the running stability of the mold base 2. During the operation of the lower mold 22, the lower roller 221 is in contact with the track and performs actions such as lifting and jumping under the height difference of the jump slope section 13. Specifically, the jacking track 1 is composed of multiple paragraphs, including an uphill section 11, a jump slope section 13, and a mold closing section 14. When the lower mold 22 runs along the track, it first gradually rises through the uphill section 11 and then realizes an instantaneous upward jump through the jump slope section 13. By using the inertia and height difference generated by the jump, the swinging frame 243 swings under the action of inertia, so that the limiting shaft 242 accurately falls into the slot of the crab-claw-shaped limiting seat 241, completing the locking of the horizontal position of the lower mold 22.

[0054] In order to prevent the swinging frame 243 from being overly swung and misaligned due to inertia during the jumping process, which affects the precise alignment of the limiting shaft 242, a limiting mechanism 25 is provided at the bottom of the lower mold 22. The limiting mechanism 25 includes a suspension 251 fixedly installed on the bottom wall of the lower mold 22. The suspension 251 longitudinally extends forward to form an L-shaped seat 252. A vertically movable limiting spring 253 is sleeved inside the L-shaped seat 252. The upper end of the limiting spring 253 passes through the L-shaped seat 252 and extends downward to form an elastically telescopic structure. A through hole corresponding to the limiting spring 253 is provided on the lower mold 22. When the lower mold 22 rises along the uphill section 11 of the track, the lower end of the limiting spring 253 contacts the swinging frame 243 that is swinging, thereby restricting the swinging amplitude of the swinging frame 243 and preventing it from exceeding the designed range, ensuring that the limiting shaft 242 can accurately fall into the slot of the limiting seat 241.

[0055] Before the mold base 2 runs to the mold closing area, the door shell is placed in the lower mold 22. Since the door shell falls into the lower mold 22, during this process, the swing frame 243 locked in place will push against the limit spring 253 and move upward, thereby forming a reverse supporting force on the limit spring 253. The limit spring 253 can generate flexible displacement as the door shell gradually falls during compression, further alleviating the anti-seismic force when the door shell is in place and enhancing the structural stability of the mold base 2. During the whole process, components such as the swing frame 243, limit shaft 242, limit seat 241, and limit spring 253 work together to ensure that the lower mold 22 can achieve fast, accurate, and stable horizontal positioning when running to the target position. In order to ensure good rotational flexibility and structural stability during the running process of the swing frame 243 in place, the hinge structure between the swing frame 243 and the lower mold 22 is connected by a high-strength rotating shaft, which can withstand the instantaneous stress generated during the track jump. The clearance between the limit shaft 242 and the limit seat 241 is precisely designed to ensure both the smoothness of insertion and the stability after locking, avoiding the situation that the lower mold 22 still shakes after locking due to excessive clearance.

[0056] Generally speaking, in this embodiment, by setting the swing frame 243, limit shaft 242, limit seat 241, limit spring 253, etc., the horizontal positioning and locking operations of the lower mold 22 during the running process of the mold base 2 are effectively realized. The design of the track structure enables the lower mold 22 to complete actions such as lifting and jumping smoothly during the running process, providing a necessary power basis for the precise swing of the swing frame 243. The addition of the limit mechanism 25 further improves the controllability and stability of the movement of the swing frame 243, avoids positioning errors caused by excessive swinging, and ensures the error tolerance rate of locking. At the same time, the setting of the elastic limit spring 253 also provides a flexible buffer for the mold base 2 during the mold closing process, helps absorb the mold closing impact force, reduces the vibration of the mold base 2 during mold closing, and improves the overall coordination and reliability of the operation of the mold base 2.

[0057] Embodiment Three

[0058] As Figures 5-8 shown, based on the above embodiment, this embodiment further gives the following content:

[0059] In this embodiment, the mold closing mechanism 3 includes transmission wheels 34 rotatably arranged at both ends of the hollow mold closing beam 31. A rotary chain 35 is sleeved along the edge of the mold closing beam 31 between the transmission wheels 34. A mold closing motor 32 is inserted into the axis of the head transmission wheel 34 to drive the rotation. An inverted V-shaped sliding clamp 36 is clamped on the rotary chain 35, and a pair of clamping shafts 361 for opposite clamping are arranged at its clamp ends, which can drive the upper roller 211 to move by rotating with the transmission wheel 34 to realize the directional clamping of the upper mold 21.

[0060] A tension pulley 33 is coaxially and laterally attached to the clamping beam 31 of the tail end drive pulley 34. It includes a pulley 332 axially penetrating the beam and connected to the drive pulley 34. On both sides of the pulley 332, L-shaped fixing brackets 331 are vertically symmetrically fixed. The outer periphery of the pulley 332 is movably fitted into the fixing brackets 331, and a locking anchor 333 is fixedly arranged above the pulley 332. A columnar adjusting bolt 334 extending from the top of the pulley 332 is inserted therein. By sliding the adjusting bolt 334, the center distance between the drive pulleys 34 can be changed to achieve instant tensioning of the rotary chain 35.

[0061] A plurality of sequentially connected guide plates 311 are supported on the edge of the clamping beam 31, which can rotate and instantaneously guide along with the rotary chain 35.

[0062] The starting position of the sliding clamp 36 can be adjusted along the trajectory of the clamping beam 31 for adapting to the flipping traction of the upper die 21.

[0063] Please refer to the attached instruction manual Figures 5-8 The present invention provides a third embodiment of the clamping mechanism 3 of the die holder 2 based on the annular refrigerator door body foaming line. In this embodiment, in order to achieve automatic traction and precise clamping of the upper die 21 during the clamping process, the clamping mechanism 3 in this embodiment is arranged at the head and tail ends of the hollow clamping beam 31, and adopts a structural form combining a drive pulley 34 and a rotary chain 35. Specifically, drive pulleys 34 are respectively rotatably installed at the head and tail ends of the clamping beam 31. The drive pulleys 34 are rotationally connected to the beam through bearing assemblies, ensuring stable operation of the chain under the driving state. Along the edge of the clamping beam 31, a rotary chain 35 is sequentially sleeved. The rotary chain 35 has a closed-loop structure and surrounds the drive pulleys 34 at the head and tail ends to form a continuous traction path. The axis of the drive pulley 34 is inserted with a clamping motor 32, and the clamping motor 32 is connected to the drive pulley 34 through an output shaft to achieve cyclic driving of the rotary chain 35.

[0064] Specifically, a plurality of inverted V-shaped sliding clamps 36 are clamped between the link structures of the rotary chain 35, and the sliding clamps 36 are arranged at equal intervals along the chain direction. Oppositely arranged clamping shafts 361 are provided at both ends of each sliding clamp 36, which can contact and clamp the roller components on the upper die 21 during the movement of the chain. After the clamping motor is started, the head end drive pulley 34 rotates to drive the rotary chain 35 to run, and the sliding clamp 36 moves with the chain and engages with the upper roller 211, thereby realizing the traction movement of the upper die 21. The upper die 21 moves along the trajectory of the clamping beam 31 driven by the sliding clamp 36 and finally completes the directional clamping.

[0065] In order to maintain the tension stability of the rotary chain 35 during operation, a tensioning wheel 33 structure is attached to the outer wall of the die clamping beam 31 on one side of the end transmission wheel 34. The tensioning wheel 33 consists of a pulley 332, a fixing bracket 331 and an adjusting mechanism. The axis of the pulley 332 passes through the die clamping beam 31 and is arranged coaxially with the end transmission wheel 34 to ensure its rotation during the movement of the chain. L-shaped fixing brackets 331 are symmetrically arranged vertically on both sides of the pulley 332. The fixing brackets 331 are fixed to the outer wall of the die clamping beam 31 by bolts. The outer peripheral surface of the pulley 332 is movably fitted and connected with the fixing brackets 331, allowing the pulley 332 to make a small amount of sliding within the fixing brackets 331. A locking anchor 333 is provided above the pulley 332. A columnar adjusting bolt 334 is inserted inside the locking anchor 333. The adjusting bolt 334 extends from the top of the pulley 332. By rotating and pushing the adjusting bolt 334, the pulley 332 can move back and forth within the fixing brackets 331, thereby changing the center distance between the transmission wheels 34, and further adjusting the tension state of the rotary chain 35. After the adjustment is completed, the adjusting bolt 334 can be fixed within the locking anchor 333 through a locking nut to ensure the stability of the tension state.

[0066] To guide the movement trajectory of the sliding clamp 36 during the operation of the chain, a plurality of guide plates 311 are provided at the edge of the die clamping beam 31. The guide plates 311 are connected in sequence along the running path of the chain and are fixed to the outside of the die clamping beam 31 by screwing. The inner contour of the guide plates 311 matches the shape of the sliding clamp 36 to ensure that the sliding clamp 36 always maintains a stable posture during operation without deviation or dislocation. The guide plates 311 cooperate synchronously with the rotary chain 35 to form a continuous guiding channel, enabling the sliding clamp 36 to run smoothly along the preset trajectory.

[0067] Furthermore, for the upper die 21 assembly of appropriate size or structure, the starting position of the sliding clamp 36 can be adjusted along the trajectory of the die clamping beam 31. During the assembly process, the operator can, according to the installation position of the rollers of the upper die 21, adjust the initial position of the sliding clamp 36 on the die clamping beam 31 so that it contacts and clamps the upper roller 211 at the initial stage of the chain operation. This adjustment method is achieved by disassembling the chain links or replacing the clamping connection points, and has good flexibility and adaptability. After the sliding clamp 36 clamps the upper roller 211, the chain belt drives the upper die 21 to complete actions such as flipping, moving and clamping.

[0068] In summary, through the coordinated cooperation of structures such as the transmission wheel 34, the rotary chain 35, the sliding clamp 36, the tensioning wheel 33 and the guide plates 311, the die clamping mechanism 3 realizes the automatic traction and directional die clamping of the upper die 21. The connection between each component is compact and the movement path is clear, which is applicable to the die clamping operation scenarios of various die structures.

[0069] Embodiment Four

[0070] As Figures 1-6As shown, based on the above embodiments, the present embodiment further provides the following content:

[0071] In the present embodiment, the injection gun 4 is arranged between the uphill section 11 and the mold clamping mechanism 3, and can cooperate with the slope skipping section 13 to complete instant injection when the lower mold 22 is horizontal.

[0072] The clamping shaft 361 is clamped and locked by bolts and can be individually replaced according to the size of the upper roller 211.

[0073] Please refer to the attached Figures 1-6 description. The present invention provides a fourth embodiment of the mold clamping mechanism 3 of the mold base 2 based on the annular refrigerator door body foaming line. In the present embodiment, the mold clamping mechanism 3 of the mold base 2 includes an injection gun 4 installed on the lifting track 1. The injection gun 4 is arranged between the uphill section 11 and the mold clamping mechanism 3 and can cooperate with the structural characteristics of the slope skipping section 13 to perform instant injection after the lower mold 22 is horizontally positioned. When the mold base 2 moves along the lifting track 1, the lower roller 221 generates an instantaneous jump when passing through the slope skipping section 13, causing the swing mechanism 24 to accurately fall into the slot of the limit seat 241, ensuring that the lower mold 22 stably maintains a horizontal state, thereby providing accurate injection conditions for the injection gun 4.

[0074] In the present embodiment, in order to ensure the stable traction of the upper mold 21 during the mold clamping process, the clamping end of the sliding clamp 36 is provided with an oppositely clamping clamping shaft 361. The clamping shaft 361 is clamped and locked by bolts and can be individually replaced according to the size of the upper roller 211. By replacing the clamping shafts 361 of different sizes, different specifications of the upper rollers 211 can be adapted, ensuring that the sliding clamp 36 can provide a uniform clamping force when pulling the upper mold 21, enabling the upper mold 21 to flip smoothly and accurately engage.

[0075] In summary, in the present embodiment, by arranging the injection gun 4 between the uphill section 11 of the lifting track 1 and the mold clamping mechanism 3, instant injection after the horizontal positioning of the mold base 2 is achieved. At the same time, through the replaceable clamping shaft 361 structure, it is ensured that the sliding clamp 36 can adapt to different sizes of the upper rollers 211, thereby improving the adaptability and stability of the mold clamping mechanism 3.

[0076] The working principle and usage process of the present invention:

[0077] First, place the door shell inside the lower mold 22 of the mold base 2, and place the door liner inside the upper mold 21. At the same time, the limit spring 253 is pressed down by the door shell and compresses and deforms downward for buffering. The mold base 2 moves along the uphill section 11 of the lifting track 1, and the lower roller 221 slides on the track, gradually adjusting the inclination of the lower mold 22. When the lower roller 221 passes through the slope jump section 13, the lower mold 22 generates an instantaneous jump, driving the H-shaped swing frame 243 of the swing mechanism 24 to swing back and forth, and being limited by the lower end of the limit spring 253. Finally, it accurately falls into the slot of the crab-claw-shaped limit seat 241 at the end of the chassis 23, realizing the horizontal position locking of the lower mold 22. At this time, the injection gun 4 is located between the uphill section 11 and the mold clamping mechanism 3, and immediately injects material after the lower mold 22 is leveled, injecting the foaming material into the cavity between the door shell and the door liner.

[0078] Subsequently, the mold base 2 continues to enter the mold clamping section 14 along the track, and the upper roller 211 of the upper mold 21 synchronously enters the sliding clamp 36, and the mold clamping mechanism 3 starts to work. The driving wheel 34 drives the rotary chain 35 to rotate and traction the upper roller 211 in the sliding clamp 36 to move, causing the upper mold 21 to flip downward and engage with the lower mold 22. At the same time, the limit spring 253 is compressed and deformed, sharing the anti-vibration of the engagement of the door shell and the door liner.

[0079] During the movement of the rotary chain 35, a tensioning wheel 33 is arranged on the coaxial side of the mold clamping beam 31 of the tail end driving wheel 34. The tensioning wheel 33 includes a pulley 332, an L-shaped fixing frame 331 and a locking anchor 333. The outer periphery of the pulley 332 is movably embedded with the fixing frame 331. A columnar adjusting bolt 334 is inserted inside the locking anchor 333, which can be slidably adjusted to change the center distance between the driving wheels 34, realizing the instant tensioning of the rotary chain 35 and ensuring the stability of the rotary chain 35 during rotation. When the mold clamping is completed, the foaming material cures inside the mold, forming a heat-insulating layer. The mold base 2 continues to run along the track and enters the downhill section 12. The lower roller 221 slides along the track and disengages from the track. The H-shaped swing frame 243 and the limit seat 241 cooperate to keep the lower mold 22 horizontally locked. At this time, the mold base 2 enters the next working station and performs subsequent processing.

[0080] During the whole using process, both the upper roller 211 and the lower roller 221 are internally embedded with bearings and can rotate and roll, reducing the jitter when the mold base 2 moves on the track. Through the above process, the mold base 2 can complete the operations of assembly, mold clamping, injection and mold opening along the track and enter the next cycle.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line, including the mold base (2) on the annular refrigerator door body foaming line, a jacking track (1) is arranged on the side of the foaming line, and a mold clamping mechanism (3) and a filling gun (4) are supported thereon, and can realize instant mold clamping along with the mold base (2) through the jacking track (1), and is characterized in that: The lifting track (1) includes an uphill section (11) and a downhill section (12), and a mold clamping section (14) is connected therebetween; The mold base (2) includes a lower mold (22) supported by a bottom frame (23), and an upper mold (21) is oppositely covered thereon. The upper mold (21) and the lower mold (22) can be rotated to open and close along the edge of the back-facing lifting track (1). Upper rollers (211) and lower rollers (221) are respectively arranged in parallel on the sides thereof. The horizontal height of the lower roller (221) is flush with the lifting track (1), and it can slide along the lifting track (1) instantaneously as the mold base (2) moves to change the inclination of the lower mold (22). A swing mechanism (24) is arranged between the end of the lower mold (22) and the bottom frame (23), which can reduce the jitter of the lower mold (22) during flipping; The mold clamping mechanism (3) includes a scimitar-shaped mold clamping beam (31) erected at the rear of the lifting track (1), and a sliding clamp (36) is arranged therein, which can instantaneously pull the upper mold (21) to flip downward for mold clamping.

2. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 1, characterized in that: The swing mechanism (24) includes a rotatable H-shaped swing frame (243) hinged to the edge of the lower mold (22). A limit shaft (242) is inserted at the bottom thereof, and a crab-claw-shaped limit seat (241) is supported at the end of the bottom frame (23). A slot adapted to the limit shaft (242) is opened thereon. As the lower mold (22) slides into the uphill section (11), the swing frame (243) swings back and forth and falls into the slot to instantaneously lock the horizontal position of the lower mold (22).

3. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 2, characterized in that: A limit mechanism (25) is suspended at the bottom of the lower mold (22). It includes a suspension (251) fixed to the bottom wall of the lower mold (22). The suspension (251) longitudinally extends forward to be provided with an L-shaped seat (252). A limit spring (253) that can move up and down is vertically sleeved therein. The limit spring (253) extends downward through the L-shaped seat (252). A through hole is left on the upper end of the lower mold (22). When the lower mold (22) is lifted, it can limit the excessive swinging of the swing frame (243) for the precise alignment of the swing frame (243). When the door shell falls into the lower mold (22), the swing frame (243) presses against the limit spring (253) and moves upward, and it can be deformed locally with the door shell placed therein, which is used to eliminate the countershock during the mold clamping of the mold base (2).

4. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 3, characterized in that: The mold clamping mechanism (3) includes transmission wheels (34) rotatably arranged at the head and tail ends of the hollow mold clamping beam (31). A rotary chain (35) is sleeved along the edge of the mold clamping beam (31) between the transmission wheels (34). A mold clamping motor (32) is inserted into the axis of the head-end transmission wheel (34) to drive the rotation. An inverted V-shaped sliding clamp (36) is clamped on the rotary chain (35). Oppositely clamping clamping shafts (361) are arranged at the clamp ends, which can drive the upper rollers (211) to move as the transmission wheels (34) rotate to realize the directional clamping of the upper mold (21).

5. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 4, characterized in that: A tension pulley (33) is coaxially attached to the side of the clamping beam (31) of the tail-end drive pulley (34). It includes a pulley (332) connected through the beam with the axis of the drive pulley (34). On both sides of the pulley (332), L-shaped fixing frames (331) are vertically symmetrically fixed. The outer periphery of the pulley (332) is movably fitted with the fixing frame (331), and a locking anchor (333) is fixedly arranged above the pulley (332). A columnar adjusting bolt (334) extending from the top of the pulley (332) is inserted inside it. By sliding the adjusting bolt (334), the center distance between the drive pulleys (34) can be changed to achieve instant tensioning of the rotary chain (35).

6. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 5, characterized in that: A skip slope section (13) is provided between the uphill section (11) and the clamping section (14) of the jacking track (1). The lower roller (221) lifts the lower die (22) horizontally through the uphill section (11) and makes an upward jump through the skip slope section (13), and can swing the swing frame (243) to accurately fall into the limit seat (241) to complete the horizontal position locking.

7. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 6, characterized in that: The injection gun (4) is arranged between the uphill section (11) and the clamping mechanism (3), and can cooperate with the skip slope section (13) to complete instant injection when the lower die (22) is horizontal.

8. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 7, characterized in that: The clamping shaft (361) is clamped and locked by bolts and can be individually replaced according to the size of the upper roller (211).

9. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 8, characterized in that: A plurality of sequentially connected guide plates (311) are supported on the edge of the clamping beam (31), which can provide instant guidance as the rotary chain (35) rotates.

10. The mold clamping mechanism (3) of the mold base (2) based on the annular refrigerator door body foaming line according to claim 9, characterized in that: The starting position of the sliding clamp (36) can be adjusted along the track of the clamping beam (31) for adapting to the flipping traction of the upper die (21).

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