A multi-linkage foaming system for the upper shell of a refrigerator

Abstract

The present invention discloses a foaming system for the upper housing of a multi-linkage refrigerator, which includes a base. A first side housing, a second side housing, a third side housing, and a fourth side housing distributed on four sides are hinged to the base. The system further includes: a first core mold fixedly arranged on the base; a second core mold movably arranged on the base, with a filling gap provided between the second core mold and the first core mold; a first linkage assembly for linking the first side housing and the second core mold. When the first side housing is opened, the second core mold moves away from the first core mold to expand the filling gap. By providing the first linkage assembly, when the side housings are closed to form a closed mold cavity, the relative positions of the first core mold and the second core mold are fixed, maintaining the size of the filling gap therebetween to match the production target. After the housing is foamed and formed, when the first side housing is opened, the second core mold is linked to move away from the first core mold to expand the filling gap between the two core molds.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator housing foaming, and particularly relates to a multi-linkage refrigerator upper housing foaming system. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, and is also a civilian product that keeps food or other items in a constant low temperature state. Inside the box, there are a compressor and an ice maker for freezing cabinets or boxes, and a storage box with a refrigeration device. The housing of the refrigerator is an important part of the heat preservation function. It is usually a sandwich structure, and the inside is filled with foaming material. This kind of foaming material is usually polyurethane foam plastic, which is a recyclable material and can promote the realization of resource conservation and recycling.

[0003] Patent document CN108357050A was published on August 3, 2018, and discloses a refrigerator box body foaming mold. The technical solution includes: a box body composed of a bottom plate, side clamping plates and a top cover plate. A mold core is provided inside the box body. The mold core includes a left convex mold and a right convex mold. The pre-assembled box body is sleeved into the mold core. Universal wheels are provided at the lower end of the bottom plate. A first ejecting oil cylinder and a second ejecting oil cylinder are welded on the upper surface of the bottom plate. Through holes are provided on the upper surfaces of the left convex mold and the right convex mold, and a top plate is provided inside the through holes. The front end of a hydraulic oil cylinder is welded on the upper surface of the top cover plate. A magnetic lock is provided on the side of the lower surface of the top cover plate. Grooves are provided on the upper surfaces of the side clamping plates, and iron plates are provided inside the grooves. The beneficial effects are as follows: It overcomes the deficiencies of the prior art, is reasonably designed, has a compact structure, and the electromagnetic locking device between the top cover plate and the side clamping plates can directly lock the cover plate and the side clamping plates, eliminating the need for manual operation, which is time-consuming and laborious, and reducing the production cost.

[0004] In the prior art such as the above patent, when the refrigerator housing is produced, usually more than one refrigerating space is arranged inside it, so that multiple core bodies in the mold are arranged at intervals. During the foaming molding process, the part in the interval of the core bodies is often molded more tightly, resulting in increased demolding difficulty. Therefore, a multi-linkage refrigerator upper housing foaming system is urgently needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-linkage refrigerator upper housing foaming system to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A multi-linkage refrigerator upper shell foaming system includes a base. Hinged on the base are a first side shell, a second side shell, a third side shell, and a fourth side shell distributed on four sides. The first side shell and the second side shell are arranged opposite to each other, and the third side shell and the fourth side shell are arranged opposite to each other. It further includes: a first core mold fixedly arranged on the base; a second core mold movably arranged on the base, with a filling gap provided between it and the first core mold; a first linkage assembly used to link the first side shell and the second core mold. When the first side shell is opened, the second core mold moves away from the first core mold to expand the filling gap.

[0008] Preferably, a guide rail is fixedly arranged on the base, and a guide groove matching the guide rail is arranged on the bottom surface of the second core mold.

[0009] Preferably, the first linkage assembly includes a linkage groove arranged on the bottom surface of the second core mold. A linkage block is movably arranged in the linkage groove. A linkage rod is movably arranged in the base. One end of the linkage rod is connected to the linkage block, and the other end is connected to the first side shell through a connecting rod assembly.

[0010] Preferably, a buffer section is arranged on the linkage rod. A linkage seat fixedly connected to the linkage block is movably sleeved on the buffer section. A first elastic member is arranged on one side of the linkage seat.

[0011] Preferably, a shielding portion for limiting the third side shell is arranged on the side of the first side shell. The shielding portion cancels the limit on the third side shell when the first side shell is fully opened.

[0012] Preferably, the rotation of the second side shell and the third side shell are linked through a second linkage assembly.

[0013] Preferably, the second linkage assembly includes a linkage shaft rotatably arranged in the base. One end of the linkage shaft is coaxially connected with a first gear. The first gear is meshed and connected with a first rack. The first rack is connected to the second side shell through a connecting rod assembly. The other end of the linkage shaft is coaxially connected with a second gear. The second gear is meshed and connected with a lifting frame through a second rack. A pushing and pulling member is connected to the lower end of the third side shell. The lower end of the pushing and pulling member is movably connected to the lifting frame.

[0014] Preferably, a slider is fixedly arranged at the upper end of the pushing and pulling member. A sliding groove matching the slider is arranged in the third side shell. A second elastic member is arranged between the side of the slider away from the second core mold and the inner wall of the sliding groove. A sliding pin is arranged at the lower end of the pushing and pulling member. A linkage plate is arranged on the lifting frame. A double-section sliding groove matching the sliding pin is arranged on the linkage plate.

[0015] Preferably, the rotation of the second side shell and the fourth side shell are linked, and the linkage relationship is the same as that between the second side shell and the third side shell.

[0016] Preferably, a receiving groove is provided at the bottom of the third side housing, and a shovel plate is slidably arranged in the receiving groove. The shovel plate is fixedly connected with a pushing and pulling member.

[0017] In the above technical solution, the beneficial effect of the present invention is:

[0018] Through the setting of the first linkage component in the multi-linkage refrigerator upper housing foaming system, when the side housings are close to each other to form a closed mold cavity, the relative positions of the first core mold and the second core mold are fixed, maintaining the size of the filling gap therebetween to match the production target. When the housing is foam-molded, the first side housing is opened, and then the second core mold is linked to move away from the first core mold to expand the filling gap between the two core molds, thus facilitating the demolding of the subsequently foam-molded housing and improving the practicability of the device.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0020] This application document provides an overview of various implementations or examples of the technologies described in the present disclosure, and is not a complete disclosure of the entire scope or all features of the disclosed technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the front sectional structure provided by an embodiment of the present invention;

[0024] Figure 3 It is provided by an embodiment of the present invention Figure 2 The enlarged schematic diagram of the structure at A;

[0025] Figure 4 It is a schematic diagram of the structure of the second linkage component provided by an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the side sectional structure at the chute provided by an embodiment of the present invention;

[0027] Figure 6 It is provided by an embodiment of the present invention Figure 5 The enlarged schematic diagram of the structure at B;

[0028] Figure 7 Schematic side-sectional structure view at the linkage shaft provided by an embodiment of the present invention;

[0029] Figure 8 Schematic top-sectional structure view provided by an embodiment of the present invention.

[0030] Explanation of reference numerals:

[0031] 1. Base; 2. First side shell; 3. Second side shell; 4. Third side shell; 5. Fourth side shell; 6. First core mold; 7. Second core mold; 8. Guide rail; 9. Guide groove; 10. Linkage groove; 11. Linkage block; 12. Linkage rod; 13. Linkage seat; 14. First elastic member; 15. Shielding portion; 16. Linkage shaft; 17. First gear; 18. First rack; 19. Second gear; 20. Second rack; 21. Lifting frame; 22. Pushing and pulling member; 23. Slide block; 24. Slide groove; 25. Second elastic member; 26. Sliding pin; 27. Linkage plate; 28. Double-section sliding groove; 29. Storage groove; 30. Shoveling plate. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0033] Please refer to Figure 1-8 , a multi-linkage refrigerator upper shell foaming system provided by an embodiment of the present invention, including a base 1, on which a first side shell 2, a second side shell 3, a third side shell 4, and a fourth side shell 5 distributed on four sides are hinged. The first side shell 2 and the second side shell 3 are oppositely arranged, and the third side shell 4 and the fourth side shell 5 are oppositely arranged. The system further includes: a first core mold 6, which is fixedly arranged on the base 1; a second core mold 7, which is movably arranged on the base 1, and a filling gap is arranged between it and the first core mold 6; a first linkage assembly, which is used to link the first side shell 2 and the second core mold 7, and when the first side shell 2 is opened, the second core mold 7 moves away from the first core mold 6 to expand the filling gap.

[0034] Specifically, the top of the base 1 is horizontal and is set as a seamless plane; the outer side walls of the base 1 in all directions are provided with support members, and the support members are used to support the side shells after opening; preferably, universal wheels can be installed at the bottom of the base 1 to facilitate the movement of the entire mold. The first side shell 2, the second side shell 3, the third side shell 4 and the fourth side shell 5 are preferably hingedly connected to the base 1; the first side shell 2 and the second side shell 3 correspond to the long sides of the base 1, and a covering part is arranged on the top of the first side shell 2 and the second side shell 3; a tensioning locking mechanism is arranged on the covering part, which can be locked when the first side shell 2 and the second side shell 3 are closed and brought together; each side shell has a vertically erected closed state and an open state tilted outward; when each side shell is in a closed state, its four closed sides are surrounded by the base 1, and the covering parts on the top of the first side shell 2 and the second side shell 3 can form a complete covering structure to cover the top of the base 1, thereby jointly forming a closed mold cavity; when each side shell is in a closed state, the third side shell 4 and the fourth side shell 5 are just clamped between the first side shell 2 and the second side shell 3; when each side shell is in an open state, the foaming shell can easily enter and exit the mold cavity. The side shell may be provided with an injection tube or an injection port for injecting polyurethane foam material into the mold cavity and foaming and molding under certain reaction conditions; polyurethane foam material is a recyclable material, and waste polyurethane foam material can be recycled by a variety of methods, such as bonding to make recycled foam plastics, crushing and hot pressing into products, as fillers for producing foam plastics, or decomposing into polyurethane raw materials by chemical methods for reuse, etc. These recycling and reuse methods not only help reduce environmental pollution, but also achieve resource conservation and recycling. The first core mold 6 is fixed in the mold cavity, and the second core mold 7 is movably arranged in the mold cavity, and the movable direction moves away from or close to the first core mold 6 along the length direction of the base 1; one side of the first core mold 6 is in contact with the fourth side shell 5, and the other opposite side is spaced apart with the second core mold 7, and the second core mold 7 is arranged close to the third side shell 4; the tops of the first core mold 6 and the second core mold 7 are spaced apart from the top surface in the mold cavity, and the other sides of the core molds are also spaced apart from the inner wall of the mold cavity. The first linkage component links the rotation of the first side shell 2 and the movement of the second core mold 7, specifically: when the first side shell 2 is closed, the second core mold 7 remains close to the first core mold 6, and the size of the filling gap therebetween matches the production target, and when the first side shell 2 is opened, the second core mold 7 moves away from the first core mold 6 to expand the filling gap therebetween. In actual use of this technical solution, when the side shells are brought together to form a closed mold cavity, the relative positions of the first core mold 6 and the second core mold 7 are fixed, maintaining the size of the filling gap therebetween to match the production target, and when the shell is foamed and formed, the first side shell 2 is opened, and the second core mold 7 is linked by the first linkage component to move away from the first core mold 6 to expand the filling gap between the two core molds, thereby facilitating the demolding of the subsequent foamed shell.

[0035] Compared with the prior art, a foaming system for the upper housing of a multi-linkage refrigerator proposed in the embodiment of the present invention, by setting a first linkage component, when the side housings are closed to form a closed mold cavity, the relative positions of the first core mold 6 and the second core mold 7 are fixed, maintaining the size of the filling gap therebetween to match the production target. When the housing is foamed and formed, the first side housing 2 is opened, and the second core mold 7 is driven to move away from the first core mold 6 to expand the filling gap between the two core molds, thus facilitating the demolding of the subsequently foamed and formed housing and improving the practicability of the device.

[0036] As a preferred technical solution of this embodiment, a guide rail 8 is fixedly arranged on the base 1, and a guide groove 9 matching the guide rail 8 is arranged on the bottom surface of the second core mold 7. Specifically, the arrangement of the guide rail 8 and the guide groove 9 guides the moving direction of the second core mold 7 to move away from or close to the first core mold 6 along the length direction of the base 1; and the guide rail 8 and the guide groove 9 limit the second core mold 7 to closely adhere to the base 1.

[0037] As a preferred technical solution of this embodiment, the first linkage component includes a linkage groove 10 arranged on the bottom surface of the second core mold 7, a linkage block 11 is movably arranged in the linkage groove 10, a linkage rod 12 is movably arranged in the base 1, one end of the linkage rod 12 is connected to the linkage block 11, and the other end is connected to the first side housing 2 through a connecting rod assembly. Specifically, the linkage groove 10 and the linkage block 11 are preferably in the shape of a parallelogram, and the moving direction of the linkage block 11 in the linkage groove 10 is set at an acute angle with the moving direction of the second core mold 7; the moving direction of the linkage rod 12 is horizontally perpendicular to the rotating shaft of the first side housing 2; the connecting rod assembly includes three rods hinged end to end, the free end of one end rod can be fixedly connected to the outer wall of the first side housing 2, and the free end of the other end rod is fixedly connected to the linkage rod 12, so that the rotation of the first side housing 2 can drive the axial movement of the linkage rod 12. Specifically, when the first side housing 2 rotates and closes, the connecting rod assembly drives the linkage rod 12 to move outward from the base 1, and the linkage rod 12 drives the linkage block 11 to slide in the linkage groove 10, so that the second core mold 7 approaches the first core mold 6; when the first side housing 2 rotates and opens, the connecting rod assembly drives the linkage rod 12 to move inward into the base 1, and the linkage rod 12 drives the linkage block 11 to slide in the linkage groove 10, so that the second core mold 7 moves away from the first core mold 6.

[0038] As a further preferred technical solution of this embodiment, a buffer section is provided on the linkage rod 12. A linkage seat 13 fixedly connected to the linkage block 11 is movably sleeved on the buffer section. A first elastic member 14 is provided on one side of the linkage seat 13. Specifically, the buffer section is provided at one end of the linkage rod 12 extending towards the inside of the base 1. Two spaced rings are provided on the buffer section. The linkage seat 13 is movably sleeved between the two rings. The first elastic member 14 is preferably a spring and can be sleeved on the buffer section. The first elastic member 14 is located on the side of the linkage seat 13 close to the first side housing 2; the setting of the first elastic member 14 keeps the linkage seat 13 pushed towards the end of the linkage rod 12 extending towards the inside of the base 1. In actual use of this technical solution, after the housing in the mold cavity is foam-molded, when the first side housing 2 is opened, the first side housing 2 rotates to drive the linkage rod 12 to move towards the inside of the base 1 through the linkage component. Since the foam housing formed on the second core mold 7 is blocked by the third side housing 4 that has not been opened yet, the second core mold 7 does not move immediately, so the movement of the linkage block 11 is restricted. Then, the linkage rod 12 axially moves relative to the linkage seat 13, compressing the first elastic member 14 and storing elastic potential energy. Subsequently, when the first side housing 2 has been opened and then the third side housing 4 is opened, the elastic potential energy of the first elastic member 14 is released, pushing the linkage seat 13 to move. The linkage seat 13 drives the linkage block 11 to move in the linkage groove 10, thereby driving the second core mold 7 to move a distance away from the first core mold 6 to expand the filling gap between the two core molds.

[0039] In another embodiment proposed by the present invention, a shielding portion 15 for limiting the third side housing 4 is provided on the side of the first side housing 2. The shielding portion 15 cancels the limitation of the third side housing 4 when the first side housing 2 is fully opened. Specifically, the shielding portion 15 is provided on the side of the first side housing 2. When each side housing is closed, the shielding portion 15 can shield in the opening direction of the third side housing 4. The shielding portion 15 is arranged close to the lower side, so as to satisfy that when the first side housing 2 is fully opened, it disengages from the opening direction of the third side housing 4, that is, cancels the limitation of the third side housing 4 to rotate and open. In the actual use of this technical solution, after the housing in the mold cavity is foam-molded, the first side housing 2 is opened. The first side housing 2 rotates to drive the linkage rod 12 to move inward toward the base 1 through the linkage assembly. During the process when the first side housing 2 is not fully opened, the shielding portion 15 keeps limiting the third side housing 4. Therefore, the foam housing formed on the second core mold 7 is blocked by the third side housing 4 that has not been opened yet, and the second core mold 7 does not move immediately. Then, the movement of the linkage block 11 is restricted, so the linkage rod 12 axially moves relative to the linkage seat 13, compressing the first elastic member 14 and storing elastic potential energy. Subsequently, when the first side housing 2 is fully opened, the shielding portion 15 cancels the limitation of the third side housing 4. Then, the elastic potential energy of the first elastic member 14 is released, pushing the linkage seat 13 to move. The linkage seat 13 drives the linkage block 11 to move in the linkage groove 10, thereby driving the second core mold 7 to move a distance away from the first core mold 6 to expand the filling gap between the two core molds. At the same time, the second core mold 7 pushes the third side housing 4 to be opened passively through the foam housing thereon. In addition, after the foam housing is demolded, the closing of the third side housing 4 is not affected by the position of the second core mold 7.

[0040] In yet another embodiment proposed by the present invention, the rotation of the second side housing 3 and the third side housing 4 are linked through a second linkage assembly. Specifically, through the setting of the second linkage assembly, the opening and closing of the third side housing 4 are linked with the opening and closing of the second side housing 3 to occur synchronously.

[0041] As a preferred technical solution of this embodiment, the second linkage assembly includes a linkage shaft 16 rotatably disposed in the base 1. One end of the linkage shaft 16 is coaxially connected to a first gear 17. The first gear 17 is meshed with a first rack 18. The first rack 18 is connected to the second side housing 3 through a link assembly. The other end of the linkage shaft 16 is coaxially connected to a second gear 19. The second gear 19 is meshed with a lifting frame 21 through a second rack 20. A push-pull member 22 is connected to the lower end of the third side housing 4. The lower end of the push-pull member 22 is movably connected to the lifting frame 21. Specifically, the axial direction of the linkage shaft 16 is parallel to the moving direction of the second core mold 7; the moving direction of the first rack 18 is horizontally perpendicular to the axial direction of the linkage shaft 16; the link assembly includes three rods hinged end to end. The free end of one end rod can be fixedly connected to the outer wall of the second side housing 3, and the free end of the other end rod is fixedly connected to the second rack 20; the lifting frame 21 is disposed corresponding to the lower side of the third side housing 4, and the lifting frame 21 is vertically lifted and lowered in the base 1; the push-pull member 22 rotates with the third side housing 4, and the lifting frame 21 is lifted and lowered. The movable connection between the lifting frame 21 and the push-pull member 22 enables the lifting generated by the rotation of the push-pull member 22 to be synchronized with the lifting of the lifting frame 21, and the movement of other directions of the push-pull member 22 is prevented from interfering through the movable connection with the lifting frame 21. The specific linkage relationship between the second side housing 3 and the third side housing 4 is as follows: when the third side housing 4 is opened, it drives the push-pull member 22 to rotate and move upward. The lower end of the push-pull member 22 has a relative movement with the lifting frame 21, and drives the lifting frame 21 to rise. The lifting frame 21 is driven by the second rack 20 and the second gear 19 to drive the linkage shaft 16 to rotate. The linkage shaft 16 drives the first rack 18 to move towards the inner side of the base 1 through the first gear 17. Then, the second side housing 3 is driven by the first rack 18 through the link assembly and rotates in the opening direction synchronously; when the third side housing 4 is closed, it is consistent with the above transmission process, but the transmission direction is opposite, so that the second side housing 3 rotates in the closing direction synchronously. Further, after the third side housing 4 is impacted by the movement of the second core mold 7 away from the first core mold 6, it has a tendency to rotate in the opening direction, and at the same time leaves the vertical position, so that the tendency to rotate in the opening direction can be increased under the action of gravity. Therefore, both the second side housing 3 and the third side housing 4 are driven to open passively under the action of gravity, rather than a transmission relationship where one drives the other.

[0042] As a further preferred technical solution of this embodiment, a slider 23 is fixedly provided on the upper end of the push-pull member 22, a slide groove 24 matching the slider 23 is provided in the third side shell 4, a second elastic member 25 is provided between the side of the slider 23 away from the second core mold 7 and the inner wall of the slide groove 24, a sliding pin 26 is provided at the lower end of the push-pull member 22, a linkage plate 27 is provided on the lifting frame 21, and a double-section sliding groove 28 matching the sliding pin 26 is provided on the linkage plate 27. Specifically, the second elastic member 25 may preferably be a spring, and the second elastic member 25 keeps pushing the slider 23 towards the second core mold 7; the sliding pin 26 is axially parallel to the axial direction of the rotating shaft of the third side shell 4; the surface of the linkage plate 27 is perpendicular to the axial direction of the sliding pin 26; the double-section sliding groove 28 includes an inclined sliding groove and a smooth groove, and the inclined sliding groove is arranged on the side away from the second core mold 7 compared with the smooth groove, and the inclined sliding groove is arranged at an end away from the second core mold 7 and tilted upward. In actual use of this technical solution, when the second side shell 3 is closed, the first rack 18 is driven to move toward the outside of the base 1 through the connecting rod assembly, and the first rack 18 drives the lifting frame 21 to descend through the first gear 17, the linkage shaft 16, the second gear 19, and the second rack 20 in turn. The lifting frame 21 drives the sliding pin 26 through the linkage plate 27 and the double-stage sliding groove 28 to drive the push-pull member 22 downward. At this time, the slider 23 is pushed by the second elastic member 25 and remains against the side of the slide groove 24 close to the second core mold 7. Then, after the push-pull member 22 is driven by the above, it drives the third side shell 4 to rotate and close. In this process, the sliding pin 26 at the lower end of the push-pull member 22 moves in the smooth groove part of the double-stage sliding groove 28 in the direction of the inclined slide groove part close to the second core mold 7. To eliminate movement interference; when the third side shell 4 is in the vertically closed state, the third side shell 4 cannot continue to rotate, and the push-pull member 22 cannot rotate therewith, while the second side shell 3 has not been completely closed and continues to rotate in the closing direction, so the lifting frame 21 continues to drive the linkage plate 27 to descend, and the linkage plate 27 slides relative to the sliding pin 26 through the inclined sliding groove part of the double-section sliding groove 28, thereby eliminating the interference with the push-pull member 22 caused by the continued descent of the lifting frame 21, and the push-pull member 22 drives the slider 23 to move in the sliding groove 24 away from the second core mold 7 and squeeze the second elastic member 25; in addition, the third side shell 4 is closed first, and then the second side shell 3 is closed, which can ensure that the third side shell 4 can smoothly enter the inner side of the second side shell 3 to avoid interference.When the second side housing 3 is opened, through the above transmission process, the lifting frame 21 rises. At this time, the sliding pin 26 is located in the inclined chute portion of the double-section sliding groove 28, and the elastic potential energy of the second elastic member 25 is released, pushing the slider 23 to move closer to the side of the chute 24 near the second core mold 7. The push-pull member 22 then moves closer to the second core mold 7. The sliding pin 26 slides in the inclined chute portion of the double-section sliding groove 28 and approaches the flat chute portion. At this time, the third side housing 4 remains in the closed state, and the second side housing 3 is first opened by a certain angle; subsequently, the release of the elastic potential energy of the second elastic member 25 ends, the second side housing 3 continues to open, and the lifting frame 21 continues to rise, and then the third side housing 4 is linked to open accordingly.

[0043] As a preferred technical solution of this embodiment, the second side housing 3 is rotationally linked with the fourth side housing 5, and the linkage relationship is the same as that between the second side housing 3 and the third side housing 4. Specifically, both the third side housing 4 and the fourth side housing 5 are linked with the second side housing 3 to achieve synchronous opening and closing.

[0044] As a preferred technical solution of the above embodiment, a receiving groove 29 is provided at the bottom of the third side housing 4. A shovel plate 30 is slidably arranged in the receiving groove 29, and the shovel plate 30 is fixedly connected to the push-pull member 22. Specifically, during the foam molding in the mold cavity, it may adhere to the upper surface of the base 1, causing the subsequent inability of the second core mold 7 to move; the provision of the shovel plate 30 can release the elastic potential energy of the second elastic member 25 when the locking between the first side housing 2 and the second side housing 3 is released and the first side housing 2 is opened, so that the second side housing 3 is opened by a certain angle. Moreover, the push-pull member 22 drives the shovel plate 30 to extend out of the receiving groove 29 and enter the mold cavity to insert under the foam shell close to the third side housing 4, so as to pry open one side of the foam shell on the base 1, thereby relaxing the foam shell between the foam shell and the base 1. Subsequently, the second core mold 7 can generate an impact activity in the direction of pushing the third side housing 4, that is, there is a tendency for the second side housing 3 and the third side housing 4 to open. Therefore, the shovel plate 30 further relaxes the foam shell between the foam shell and the base 1 as the third side housing 4 rotates, ensuring the smooth movement of the second core mold 7 and promoting the opening of the side housing; further, the extended length of the shovel plate 30 does not interfere with the foam shell after the third side housing 4 rotates by a certain angle and can be within the expansion and contraction range of the foam shell to avoid deforming the foam shell.

[0045] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A multi-link refrigerator upper shell foaming system, comprising a base (1), a first side shell (2), a second side shell (3), a third side shell (4) and a fourth side shell (5) are hingedly connected to the base (1) and are distributed on four sides, the first side shell (2) and the second side shell (3) are arranged opposite to each other, and the third side shell (4) and the fourth side shell (5) are arranged opposite to each other, characterized in that: Also includes: A first core mold (6) is fixedly arranged on the base (1); A second core mold (7) is movably arranged on the base (1), and a filling gap is arranged between the second core mold (7) and the first core mold (6); The first linkage assembly is used to link the first side shell (2) and the second core mold (7). When the first side shell (2) is opened, the second core mold (7) moves away from the first core mold (6) to expand the filling gap. The first linkage assembly comprises a linkage groove (10) arranged on the bottom surface of the second core mold (7), a linkage block (11) is movably arranged in the linkage groove (10), and a linkage rod (12) is movably arranged in the base (1). One end of the linkage rod (12) is connected to the linkage block (11), and the other end is connected to the first side shell (2) through the connecting rod assembly. A buffer section is arranged on the linkage rod (12). The movable sleeve on the buffer section is provided with a linkage seat (13) fixedly connected to the linkage block (11), and a first elastic member (14) is provided on one side of the linkage seat (13); the rotation of the second side shell (3) is linked with the third side shell (4) through a second linkage assembly; the second linkage assembly comprises a linkage shaft (16) rotatably arranged in the base (1), one end of the linkage shaft (16) is coaxially connected with a first gear (17), the first gear (17) is meshingly connected with a first rack (18), the first rack (18) is connected to the second side shell (3) through a connecting rod assembly, and the other end of the linkage shaft (16) is coaxially connected with a first gear (17). The shaft is connected to a second gear (19), the second gear (19) is meshedly connected to a lifting frame (21) through a second rack (20), the lower end of the third side shell (4) is connected to a push-pull member (22), the lower end of the push-pull member (22) is movably connected to the lifting frame (21); a slider (23) is fixedly arranged at the upper end of the push-pull member (22), a slide groove (24) matching the slider (23) is arranged in the third side shell (4), a second elastic member (25) is arranged between the side of the slider (23) away from the second core mold (7) and the inner wall of the slide groove (24), and a slide is arranged at the lower end of the push-pull member (22). A sliding pin (26) is provided on the lifting frame (21), and a linkage plate (27) is provided on the linkage plate (27), and a double-section sliding groove (28) matching the sliding pin (26) is provided; a receiving groove (29) is provided at the bottom of the third side shell (4), and a shovel plate (30) is slidably provided in the receiving groove (29), and the shovel plate (30) is fixedly connected to the push-pull member (22); when the first side shell (2) is opened, the elastic potential energy of the second elastic member (25) can be released, so that the second side shell (3) is opened to a certain angle, and the push-pull member (22) drives the shovel plate (30) to extend out of the receiving groove (29).

2. The multi-link refrigerator upper shell foaming system according to claim 1, characterized in that: A guide rail (8) is fixedly arranged on the base (1), and a guide groove (9) matching the guide rail (8) is arranged on the bottom surface of the second core mold (7).

3. The multi-link refrigerator upper shell foaming system according to claim 1, characterized in that: A shielding portion (15) for limiting the third side shell (4) is provided on the side of the first side shell (2), and the shielding portion (15) cancels the limiting of the third side shell (4) when the first side shell (2) is fully opened.

4. The multi-link refrigerator upper shell foaming system according to claim 1, characterized in that: The second side shell (3) and the fourth side shell (5) rotate in linkage, and the linkage relationship is consistent with the linkage relationship between the second side shell (3) and the third side shell (4).

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