Air bag locking mechanism for annular refrigerator door foaming line mold frame

Abstract

The utility model relates to an air bag locking mechanism for an annular refrigerator door body foaming line mold frame, the foaming line mold frame comprises an upper mold frame and a lower mold frame, the inner side surfaces of the upper mold frame and the lower mold frame are hinged in an openable and closable manner, and a plurality of inverted U-shaped bolt buckles are longitudinally and upwards arranged on the outer side surface of the lower mold frame along the long side direction at equal intervals; clamping bolts which are of L-shaped structures and can be correspondingly connected with the bolt buckles in a buckled mode are longitudinally and downwards arranged on the outer side face of the upper die frame at equal intervals in the long edge direction of the upper die frame, and the tops of the clamping bolts are hinged to the outer side face of the upper die frame; a die lining plate matched with the lower die frame is placed on the top face of the lower die frame, and the die lining plate and the lower die frame are in elastic floating connection through four elastic pulling assemblies distributed in a rectangular shape. And an air bag is laid in a cavity formed between the mold lining plate and the lower mold frame. Through the cooperation mechanism of dynamic pressurization of the air bag and elastic pull uniform load reset, self-adaptive adjustment of the sealing pressure of the mold cavity and mold deformation compensation are achieved, the foaming quality is remarkably improved, meanwhile, the locking structure is simplified, and the production flexibility is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of foaming mold frame technology, and specifically relates to an airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door. Background Technology

[0002] Currently, refrigerator door foaming line mold frames are generally composed of upper and lower mold frames that can be opened and closed. During the production process, after the upper and lower mold frames are opened, they are respectively embedded into the door liner and door shell. Then, foaming material is injected into the door shell mold cavity through the filling gun, and then the upper and lower mold frames are closed to foam.

[0003] In the prior art, in order to ensure the sealing effect of the foaming cavity formed by the door shell and the door liner after mold closing, the upper and lower mold frames are usually rigidly snapped together; however, this rigid locking method will leave gaps, affecting the sealing effect of the foaming cavity and thus reducing the quality of the foaming layer. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing an airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door. The specific technical solution is as follows:

[0005] This utility model provides an airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door. The foaming line mold frame includes an upper mold frame and a lower mold frame, and the inner sides of the two are hinged together in an openable manner. The outer side of the lower mold frame is provided with a plurality of inverted U-shaped buckles at equal intervals along its long side. The outer side of the upper mold frame is provided with L-shaped latches at equal intervals along its long side, which can be snapped together with the buckles, and the top of the latches is hinged to the outer side of the upper mold frame.

[0006] A mold liner plate adapted to it is placed on the top surface of the lower mold frame. The mold liner plate and the lower mold frame are elastically floatingly connected by four elastic tension components distributed in a rectangle. An airbag is laid in the cavity formed between the mold liner plate and the lower mold frame.

[0007] The airbag is divided into an inflated state and a deflated state. When inflated, the airbag overcomes the tension of the elastic assembly and pushes the mold liner upward. The mold liner, through the refrigerator door mold placed on it, applies a supporting force to the upper mold frame, causing the horizontal part of the latch to be longitudinally pressed against the corresponding buckle. When deflated, the mold liner is reset by the tension of the elastic assembly, causing the horizontal part of the latch to be longitudinally released from the corresponding buckle.

[0008] As a preferred technical solution of this utility model, a linkage plate is horizontally connected between the outer surfaces of the plurality of said bolts.

[0009] As a preferred technical solution of this utility model, the elastic pull assembly includes a pull rod that passes through the lower mold frame with a vertical gap. The bottom end of the pull rod is screwed with a limit nut, and the top end of the pull rod is axially fixed with a cylindrical rubber cap. The top surface of the rubber cap is fixedly embedded with the bottom surface of the mold liner. A spring is axially sleeved on the lower part of the pull rod. The upper end of the spring is connected to the bottom surface of the lower mold frame, and the lower end is connected to the limit nut.

[0010] As a preferred technical solution of this utility model, after the upper mold frame and the lower mold frame are closed, multiple anti-collision components arranged longitudinally on the outer side of the upper mold frame are supported and abutted against the lower mold frame.

[0011] The anti-collision assembly includes an anti-collision rod that is longitudinally fixed to the outer side of the upper mold frame. An adjusting screw is axially screwed to the bottom end of the anti-collision rod. A buffer pad is axially and vertically fixed to the bottom end of the adjusting screw. After the mold is closed, the buffer pad is supported and abutted against a suspension block that is vertically connected to the top of the inner side of the corresponding buckle.

[0012] As a preferred technical solution of this utility model, a limit component is provided laterally on the rear side of the hinged end of the bolt and the outer side of the upper mold frame.

[0013] The limiting component includes a support block that is vertically fixed to the edge of the top surface of the upper mold frame. A limiting screw is vertically screwed to the middle of the support block. The front end of the limiting screw is spaced apart at the rear side of the hinge end between the corresponding bolt and the outer side of the upper mold frame.

[0014] As a preferred embodiment of this utility model, the horizontal part of the buckle is vertically screwed with a top screw, the top end of the top screw is in close contact with the inner top surface of the corresponding buckle, and the inner top surface of the buckle is set as a top inclined surface that slopes inward.

[0015] As a preferred embodiment of this utility model, circulating water pipes for temperature control are provided inside the housings of the upper mold frame and the lower mold frame.

[0016] The beneficial effects of this utility model are:

[0017] In the airbag locking mechanism of this utility model, when the upper mold frame is closed, it drives multiple L-shaped bolts to move downward. The L-shaped hook of each bolt is embedded in the buckle of the lower mold frame, forming a multi-point rigid locking. The locking force is evenly distributed, avoiding sealing failure caused by stress concentration at a single point, and improving the sealing effect of the foaming mold cavity.

[0018] During the foaming stage, the airbag inflates and expands, overcoming the tension of the elastic component and pushing the mold liner and door mold upward. This increases the pressure between the horizontal part of the latch and the longitudinal part of the buckle, eliminating the gap residue of traditional rigid locking and better ensuring the sealing of the mold cavity.

[0019] Compared to the static locking of traditional rigid buckles, the airbag pressure can dynamically adjust the locking force according to the volume expansion during foaming material injection, compensating in real time for gaps caused by mold thermal deformation or mechanical tolerances. At the same time, the four rectangularly distributed elastic components generate balanced tension during inflation, ensuring uniform force on the four corners of the mold liner and preventing warping on one side.

[0020] During the foaming process, the impact force of the foaming material injection is transmitted to the air bladder through the mold liner. The gas inside the air bladder is compressed and absorbs high-frequency vibration, which prevents the formation of air bubbles and effectively improves the uniformity of the foam layer density.

[0021] Through the synergistic mechanism of dynamic pressurization of airbags and load equalization and reset of elastic tension, the mold cavity sealing pressure is adaptively adjusted and the mold deformation is compensated, which significantly improves the foaming quality, simplifies the locking structure and enhances production flexibility. Attached Figure Description

[0022] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0023] Figure 2 A top view of the structure of this utility model is shown;

[0024] Figure 3 The main structural view of this utility model is shown;

[0025] Figure 4 A side view of the structure of this utility model is shown;

[0026] Figure 5 It shows Figure 4 A magnified view of part A in the middle;

[0027] Figure 6 It shows Figure 4 A magnified view of part B in the middle.

[0028] The following components are shown in the diagram: 1. Upper mold frame; 11. Buckle; 111. Top screw; 12. Linkage plate; 2. Lower mold frame; 21. Buckle; 211. Suspension block; 212. Top inclined surface; 3. Mold liner; 4. Anti-collision assembly; 41. Anti-collision bar; 411. Adjusting screw; 42. Buffer pad; 5. Limiting assembly; 51. Support block; 52. Limiting screw; 6. Circulating water pipe; 7. Airbag; 8. Spring-pull assembly; 81. Pull rod; 82. Spring; 83. Limiting nut; 84. Cap. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0030] Example 1

[0031] To address the technical problems in the background art, the following airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door is provided:

[0032] Combination Figures 1-6 As shown, an airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door is disclosed. The foaming line mold frame includes an upper mold frame 1 and a lower mold frame 2, and the inner sides of the two are hinged together in an openable manner. The outer side of the lower mold frame 2 is provided with a plurality of inverted U-shaped buckles 21 arranged longitudinally upward at equal intervals along its long side. The outer side of the upper mold frame 1 is provided with L-shaped latches 11 arranged longitudinally downward at equal intervals along its long side, which can be snapped together with the buckles 21, and the top of the latches 11 is hinged to the outer side of the upper mold frame 1.

[0033] The lower mold frame 2 has a mold liner 3 that is compatible with it placed on its top surface. The mold liner 3 and the lower mold frame 2 are elastically floatingly connected by four elastic tension components 8 arranged in a rectangular shape. An airbag 7 is laid in the cavity formed between the mold liner 3 and the lower mold frame 2.

[0034] The airbag 7 is in an inflated state and a deflated state. When inflated, the airbag 7 overcomes the pulling force of the elastic assembly 8 and pushes the mold liner 3 upward. The mold liner 3, through the refrigerator door mold placed on it, applies a supporting force to the upper mold frame 1, causing the horizontal part of the latch 11 to longitudinally abut against the corresponding buckle 21. When deflated, the mold liner 3 is reset by the pulling force of the elastic assembly 8, causing the horizontal part of the latch 11 to longitudinally loosen from the corresponding buckle 21.

[0035] By adopting the above technical solution, when the upper mold frame 1 of the airbag locking mechanism is closed, it drives multiple L-shaped latches 11 to move down. The L-shaped hook of each latch 11 is embedded in the buckle 21 of the lower mold frame 2 to form multi-point rigid locking. The locking force is evenly distributed, avoiding sealing failure caused by stress concentration at a single point, and improving the sealing effect of the foaming mold cavity.

[0036] During the foaming stage, the airbag 7 inflates and expands, overcoming the tension of the elastic component 8 and pushing the mold liner 3 and the door mold upward. This increases the longitudinal clamping pressure between the horizontal part of the latch 11 and the buckle 21, eliminating the gap residue of traditional rigid locking and better ensuring the sealing of the mold cavity.

[0037] Compared to the static locking of traditional rigid buckles, the pressure of the airbag 7 can dynamically adjust the locking force according to the volume expansion during foaming material injection, compensating in real time for gaps caused by mold thermal deformation or mechanical tolerances. At the same time, the four rectangularly distributed elastic components 8 generate balanced tension during inflation, ensuring that the four corners of the mold liner 3 are evenly stressed and avoiding warping on one side.

[0038] During the foaming process, the impact force of the foaming material injection is transmitted to the air bladder 7 through the mold liner 3. The gas inside the air bladder is compressed and absorbs the high-frequency vibration, thus preventing the formation of bubbles and effectively improving the uniformity of the foam layer density.

[0039] Through the synergistic mechanism of dynamic pressurization of airbags and load equalization and reset of elastic tension, the mold cavity sealing pressure is adaptively adjusted and the mold deformation is compensated, which significantly improves the foaming quality, simplifies the locking structure and enhances production flexibility.

[0040] like Figure 1 and Figure 2 As shown, a linkage plate 12 is horizontally connected between the outer surfaces of the plurality of the bolts 11.

[0041] By adopting the above technical solution, the linkage plate 12 can drive multiple latches 11 to simultaneously engage with the corresponding buckles 21, and can also drive multiple latches 11 to flip outward around their respective hinge points and disengage from the corresponding buckles 21. Through the multi-point locking of buckles 21 and latches 11 and the rigid synchronous drive of linkage plate 232, high-precision closure of upper and lower mold frames is achieved, improving the efficiency of opening and closing actions.

[0042] like Figures 1-4 As shown, circulating water pipes 6 for temperature control are provided inside the housings of the upper mold frame 1 and the lower mold frame 2.

[0043] By adopting the above technical solution, the circulating water pipes 6 installed in the upper and lower mold frames can adjust the temperature inside the foaming mold cavity in a timely manner according to the foaming requirements, ensuring the foaming quality of the foaming material. By deeply integrating the temperature control function into the mold frame structure, the stability of foaming quality is effectively improved.

[0044] Example 2

[0045] Combination Figures 4-6 As shown, based on the above embodiments, this embodiment further provides the following:

[0046] In this embodiment, as Figure 4 and Figure 5 As shown, the spring-pull assembly 8 includes a pull rod 81 that passes vertically through the lower mold frame 2. The bottom end of the pull rod 81 is screwed with a limit nut 83, and the top end of the pull rod 81 is axially fixed with a cylindrical rubber cap 84. The top surface of the rubber cap 84 is fixedly embedded with the bottom surface of the mold liner plate 3. A spring 82 is axially sleeved on the lower part of the pull rod 81. The upper end of the spring 82 is connected to the bottom surface of the lower mold frame 2, and the lower end is connected to the limit nut 83.

[0047] By adopting the above technical solution, the four elastic components 8 are arranged in a rectangular shape. The spring 82 is compressed when the air bag 7 is inflated, providing uniform elastic resistance, so that the upward floating height deviation of the mold liner 3 is small, dynamically compensating for the fluctuation of foaming pressure, and avoiding sealing failure caused by local overload.

[0048] The tie rod 81 passes vertically through the guide hole of the lower mold frame 2, constraining the mold liner 3 to float only along the axial direction, preventing lateral displacement, and ensuring the alignment accuracy of the buckle 11 and the latch 21.

[0049] The rubber cap 84 (made of silicone rubber) is embedded in the bottom surface of the mold liner 3 to absorb high-frequency vibration and avoid wear caused by hard contact, thus extending the life of the mold liner 3.

[0050] When the airbag 7 deflates, the spring 82 pulls the lever 81 downward, causing the mold liner 3 to reset, and simultaneously releasing the locking force of the latch 11 and buckle 21, without the need for external drive.

[0051] The elastic tension assembly 8 achieves elastic floating and rapid reset of the mold liner 3 through the integrated design of spring 82 for load equalization and buffering, pull rod 81 for precise guidance, and rubber cap 84 for flexible shock absorption. While ensuring the uniformity of sealing pressure, it significantly improves structural reliability and ease of maintenance.

[0052] like Figure 6 As shown, the horizontal part of the latch 11 is vertically screwed with a top screw 111. The top end of the top screw 111 is in close contact with the inner top surface of the corresponding buckle 21, and the inner top surface of the buckle 21 is set as a top inclined surface 212 that is inclined inward.

[0053] By adopting the above technical solution, when the airbag 7 inflates and pushes the mold liner 3 upward, the horizontal part of the bolt 11 drives the top screw 111 to move upward. At this time, the top tip of the top screw 111 contacts the inclined surface of the top inclined surface 212. By finely adjusting the screw pitch, the vertical lifting force of the airbag 7 can be converted into vertical contact pressure on the buckle 21. The inclination angle of the top inclined surface 212 causes the top screw 111 to generate an inward horizontal component force, forcing the bolt 11 to move slightly towards the center of the mold frame, eliminating the locking looseness caused by the hinge gap. When the bolt 11 and the buckle 21 develop a gap due to long-term wear, rotating the top screw 111 can restore the preset clamping force without replacing the main components of the mold frame.

[0054] Example 3

[0055] Combination Figures 1-4 As shown, based on the above embodiments, this embodiment further provides the following:

[0056] In this embodiment, as Figures 1-3 As shown, after the upper mold frame 1 and the lower mold frame 2 are closed, they are supported and abutted against the lower mold frame 2 by multiple anti-collision components 4 that are longitudinally spaced on the outer side of the upper mold frame 1.

[0057] The anti-collision component 4 includes an anti-collision rod 41 that is longitudinally fixed to the outer side of the upper mold frame 1. An adjusting screw 411 is axially screwed to the bottom end of the anti-collision rod 41. A buffer pad 42 is axially and vertically fixed to the bottom end of the adjusting screw 411. After the mold is closed, the buffer pad 42 is supported and abutted against the suspension block 211 that is vertically connected to the top of the inner side of the corresponding buckle 21.

[0058] By adopting the above technical solution, in the anti-collision component 4, when the upper and lower mold frames are closed, the buffer pad 42 at the end of the anti-collision rod 41 will first contact the suspension block 211 to form an effective support and buffering effect; the four anti-collision components 4 are distributed in a rectangular shape, and when the mold is closed, the anti-collision components 4 will first contact and guide the mold frame to close accurately.

[0059] like Figure 1 , Figure 2 and Figure 4 As shown, a limit assembly 5 is laterally provided on the rear side of the hinge end of the bolt 11 and the outer side of the upper mold frame 1;

[0060] The limiting component 5 includes a support block 51 that is vertically fixed to the edge of the top surface of the upper mold frame 1. A limiting screw 52 is vertically screwed into the middle of the support block 51. The front end of the limiting screw 52 is spaced apart at the rear side of the hinge end between the corresponding bolt 11 and the outer side of the upper mold frame 1.

[0061] By adopting the above technical solution, the limiting screw 52 in the limiting component 5 can adjust the angle at which the control bolt 11 flips outward around the hinge point, so that the bolt 11 can better engage or disengage from the buckle 21.

[0062] Working principle and usage process of this utility model:

[0063] In use, the operator first places the door liner and door shell into the upper mold frame 1 and lower mold frame 2 respectively in the mold-open state; then, the filling gun injects foaming material into the door shell mold cavity, and the expansion pressure causes the mold liner 3 to press down, and the spring 82 of the elastic pull assembly 8 is stretched to generate dynamic compensation force; then the upper and lower mold frames are closed, and the buffer pad 42 of the anti-collision assembly 4 first contacts the suspension block 211 to absorb the impact energy through buffering; the horizontal part of the bolt 11 is embedded in the buckle 21, and the top screw 111 is in clearance contact with the top inclined surface 212; then, the air pump is started to inflate the airbag 7, and the expansion of the airbag 7 overcomes the tension of the spring 82 of the elastic pull assembly 8, pushing the mold liner 3 to move upward; the mold liner 3 applies a pushing force to the upper mold frame 1 through the refrigerator door mold at the top, thereby converting the vertical lifting force of the airbag 7 into a lateral pre-tightening force and eliminating the fit clearance. After foaming is completed, the airbag 7 deflates and releases pressure, and the spring 82 of the elastic assembly 8 pulls down the mold liner 3 through the pull rod 81; multiple bolts 11 are synchronously rotated and released under the traction of the linkage plate 12 under the action of external force, and the limit screw 52 guides the bolts 11 to return to a set angle smoothly.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door, the foaming line mold frame comprising an upper mold frame (1) and a lower mold frame (2), wherein the inner surfaces of the two are hinged together in an openable manner, characterized in that: The lower mold frame (2) has multiple inverted U-shaped buckles (21) arranged longitudinally upward at equal intervals along its long side on its outer side; the upper mold frame (1) has L-shaped latches (11) arranged longitudinally downward at equal intervals along its long side on its outer side, which can be snapped together with the buckles (21), and the top of the latches (11) is hinged to the outer side of the upper mold frame (1); The lower mold frame (2) has a mold liner (3) that is compatible with it on its top surface. The mold liner (3) and the lower mold frame (2) are elastically floatingly connected by four elastic pull components (8) arranged in a rectangular shape. An air bag (7) is laid in the cavity formed between the mold liner (3) and the lower mold frame (2). The airbag (7) is divided into an inflated state and a deflated state. When it is inflated, the airbag (7) pushes the mold liner (3) upward against the tension of the elastic assembly (8). The mold liner (3) applies a supporting force to the upper mold frame (1) through the refrigerator door mold placed on it, causing the horizontal part of the latch (11) to be longitudinally pressed against the corresponding buckle (21). When it is deflated, the mold liner (3) is reset by the tension of the elastic assembly (8), causing the horizontal part of the latch (11) to be longitudinally released from the corresponding buckle (21).

2. The airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door as described in claim 1, characterized in that: A linkage plate (12) is horizontally connected between the outer surfaces of the multiple bolts (11).

3. The airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door as described in claim 2, characterized in that: The elastic assembly (8) includes a pull rod (81) that passes vertically through the lower mold frame (2). The bottom end of the pull rod (81) is screwed with a limit nut (83), and the top end of the pull rod (81) is axially fixed with a cylindrical rubber cap (84). The top surface of the rubber cap (84) is fixedly embedded with the bottom surface of the mold liner (3). The lower part of the pull rod (81) is axially fitted with a spring (82). The upper end of the spring (82) is connected to the bottom surface of the lower mold frame (2), and the lower end is connected to the limit nut (83).

4. The airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door as described in claim 2, characterized in that: After the upper mold frame (1) and the lower mold frame (2) are closed, they are supported and abutted against by multiple anti-collision components (4) that are longitudinally spaced on the outer side of the upper mold frame (1); The anti-collision component (4) includes an anti-collision rod (41) that is longitudinally fixed to the outer side of the upper mold frame (1). An adjusting screw (411) is axially screwed to the bottom end of the anti-collision rod (41). A buffer pad (42) is axially and vertically fixed to the bottom end of the adjusting screw (411). After the mold is closed, the buffer pad (42) is supported and abutted against the suspension block (211) that is vertically connected to the top of the inner side of the corresponding buckle (21).

5. The airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door as described in claim 2, characterized in that: A limit assembly (5) is provided laterally on the rear side of the hinge end of the bolt (11) and the outer side of the upper mold frame (1); The limiting component (5) includes a support block (51) that is vertically fixed to the edge of the top surface of the upper mold frame (1). A limiting screw (52) is vertically screwed into the middle of the support block (51). The front end of the limiting screw (52) is spaced apart at the rear side of the hinge end between the corresponding bolt (11) and the outer side of the upper mold frame (1).

6. The airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door as described in claim 3, characterized in that: The horizontal part of the latch (11) is vertically screwed with a top screw (111). The top end of the top screw (111) is in close contact with the inner top surface of the corresponding buckle (21), and the inner top surface of the buckle (21) is set as a top inclined surface (212) that is inclined inward.

7. An airbag locking mechanism for a foaming line mold frame for a ring-shaped refrigerator door according to any one of claims 1 to 6, characterized in that: The upper mold frame (1) and the lower mold frame (2) are equipped with circulating water pipes (6) for temperature control.

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