Foamed plastic part and refrigerator having the same

Abstract

The present invention discloses a foaming plastic part and a refrigerator having the same, wherein the foaming plastic part comprises a shell, a foaming cavity for foaming a foaming material is formed inside the shell, an exhaust hole connecting the foaming cavity with the external space of the shell so as to exhaust air when the foaming material foams is formed on the shell, and the foaming plastic part also has an anti-overflow mechanism matched to the exhaust hole, and the anti-overflow mechanism has a movable baffle driven by the foaming material to rotate or translate to close the exhaust hole when the foaming material foams; based on the design structure of the foaming plastic part provided by the present invention, the movable baffle of the anti-overflow mechanism is driven by the foaming material to rotate or translate, and during the foaming process of the foaming material, the movable baffle can move smoothly to close the exhaust hole, which can effectively avoid overflow.

Description

Technical Field

[0001] The invention relates to the field of refrigerator design, and in particular to a foamed plastic part and a refrigerator having the same. Background Art

[0002] Refrigerators are increasingly used in homes, workplaces and other occasions. At present, various key technologies for refrigerator manufacturing have become relatively mature. How to further optimize the refrigerator manufacturing process based on existing technologies is also an important research direction.

[0003] In the specific refrigerator manufacturing process, the box body and door body with heat preservation function are obtained by foaming the foaming cavity of the corresponding foamed plastic parts. The foaming material involved is polyurethane, and the foaming process is divided into three stages: milky process, gelling process, and curing process. In the specific foaming process, the air in the foaming cavity needs to be discharged, so an exhaust hole connected to the foaming cavity needs to be formed on the corresponding foamed plastic part. In the prior art, during the exhaust process, the foaming material in the gelling process will overflow to the outside of the foamed plastic part through the exhaust hole, which needs to be cleaned manually. This not only wastes manpower and increases manufacturing costs, but is also difficult to clean, thereby affecting the product quality of the door body.

[0004] In order to reduce the amount of foaming material overflowing from the exhaust hole during the foaming process, the most commonly used technology is to set the aperture size of the exhaust hole to a smaller value, usually setting the aperture to no more than 1mm. However, if the aperture size of the exhaust hole is too small, it will affect the exhaust effect of the foaming material during the foaming process and reduce the uniformity of foaming. In order to solve this technical problem, in the Chinese patent application with application number 201711153477.3, a shrapnel is set at the exhaust hole position in order to block the overflow through the shrapnel. However, analysis shows that the shrapnel involved in the patent application, based on its own characteristics, also generates an increasingly large elastic force in the process of approaching the exhaust hole, and it is easy for the shrapnel to fail to completely cover the closed exhaust hole, resulting in the risk of the foaming material overflowing from the exhaust hole.

[0005] In view of this, it is necessary to provide an improved technical solution to solve the above problems. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To achieve the above-mentioned purpose of the invention, the present invention provides a foamed plastic part, and its specific design method is as follows.

[0007] A foaming plastic part includes a shell, a foaming cavity is formed inside the shell for foaming a foaming material, an exhaust hole is formed on the shell to connect the foaming cavity with the external space of the shell so that air can be discharged when the foaming material foams, and the foaming plastic part also has an anti-overflow mechanism matched to the exhaust hole, and the anti-overflow mechanism has a movable baffle that is driven by the foaming material to rotate or translate to close the exhaust hole when the foaming material foams.

[0008] Furthermore, in the foaming cavity, in the foaming direction of the foaming material, the distribution density of the exhaust holes tends to gradually increase.

[0009] Furthermore, the foaming plastic part has a ridge protruding toward the inside of the foaming cavity, the ridge has a top wall and side walls located on opposite sides of the top wall and respectively connected to the shell, the extension direction of the ridge is consistent with the foaming direction of the foaming material, and the exhaust hole is formed through the top wall.

[0010] Furthermore, the movable baffle is rotatably arranged along a rotating shaft, the extending direction of the rotating shaft is perpendicular to the extending direction of the convex ridge, and in the foaming direction of the foaming material, the rotating shaft is located at the rear side of the corresponding exhaust hole.

[0011] Furthermore, the rotating shaft is parallel to the plane where the top wall of the ridge is located or is located on the plane where the top wall is located, and the anti-overflow structure also has side plates arranged on both sides of the movable baffle to respectively cooperate with the two side walls when the movable baffle closes the exhaust hole.

[0012] Furthermore, the rotating shaft is perpendicular to the plane where the top wall of the ridge is located, and the anti-overflow structure has a force-bearing plate fixed to the movable baffle for contacting when the foaming material foams to push the movable baffle to rotate along the rotating shaft.

[0013] Furthermore, in the foaming direction of the foaming material, a baffle is provided on the rear side of the exhaust hole for blocking the foaming material from flowing into the exhaust hole before the corresponding movable baffle blocks and closes the exhaust hole.

[0014] Furthermore, the movable baffle is movable along the extension direction of the convex ridge and is engaged with the top wall. In the foaming direction of the foaming material, the anti-overflow mechanism also has a push plate connected to the rear side of the movable baffle.

[0015] Furthermore, the anti-overflow mechanism also has side panels connected to both sides of the movable baffle and respectively cooperating with the side walls, each of the side panels protrudes in a direction away from the corresponding side wall to form a flange, and a sliding groove is fixed in the foaming cavity to cooperate with the flange and allow the flange to slide along the foaming direction.

[0016] The present invention also provides a refrigerator, comprising a box body and a door body hinged to the box body, wherein at least one of the box body and the door body is obtained by foaming the foamed plastic part described above.

[0017] The beneficial effects of the present invention are as follows: based on the design structure of the foamed plastic part provided by the present invention, the movable baffle of the anti-overflow mechanism involved is driven to rotate or translate by the foaming material, and during the foaming process of the foaming material, the movable baffle can move smoothly and then close the exhaust hole, which can effectively avoid overflow; and because the anti-overflow structure is provided, the size of the exhaust hole can be designed to be larger, thereby improving the exhaust effect of the foaming cavity during the foaming process of the foaming material, and can better ensure the foaming uniformity in the foaming material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The figure shows an overall structural schematic diagram of the foamed plastic part of the present invention;

[0020] Figure 2 Shown Figure 1 The schematic diagram of the foamed plastic part after removing the cover plate portion;

[0021] Figure 3 Shown Figure 2 The structure shown is a schematic diagram after being cut along the position A-A';

[0022] Figure 4 Shown Figure 3 An enlarged schematic diagram of part a;

[0023] Figure 5 Shown Figure 4 Shown is another angle schematic diagram of the structure;

[0024] Figure 6 Shown Figure 5 An exploded schematic diagram of the structure shown;

[0025] Figure 7 Shown Figure 4 A schematic diagram of the structure shown after being cut along a plane passing through the exhaust hole;

[0026] Figure 8 Another embodiment of the anti-overflow mechanism of the present invention is shown;

[0027] Fig. 9 Shown Figure 8 A schematic diagram of the structure shown after being cut along a plane passing through the exhaust hole;

[0028] Fig.10 Shown is another embodiment of the anti-overflow mechanism of the present invention;

[0029] Fig.11 Shown Fig.10 An exploded schematic diagram of the structure shown;

[0030] Fig.12 Shown Fig.10 The structure shown is a schematic diagram after being cut along a plane passing through the exhaust hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] refer to Figure 1 As shown, it shows the overall structure of a foamed plastic part. Specifically in this embodiment, the foamed plastic part involved is a door body of a refrigerator. It can be understood that in other embodiments of the present invention, the foamed plastic part involved can also be a door body of a refrigerator or other devices that need to be foamed and filled inside. The following will be combined with the specific structure of a door body of a refrigerator to expand the content involved in the present invention in detail.

[0033] refer to Figure 1 , Figure 2 , Figure 3 As shown, the foaming plastic part involved in this embodiment includes a shell 100, and a foaming cavity 10 for foaming the foaming material is formed inside the shell 100. Specifically in this embodiment, the shell 100 includes a main body 11 and a cover plate 12 covering one side of the main body 11. The main body 11 and the cover plate 12 are jointly arranged to form the foaming cavity 10. The foaming material foams in the foaming cavity 10 to form a foaming layer (not shown in the figure) that matches the shape of the foaming cavity 10. The foaming layer enables the corresponding door body to have a better thermal insulation effect. It can be understood that during the foaming process, the shape of the foaming layer is determined by the shape of the foaming cavity 10 of the foaming plastic part, that is, the shape of the foaming cavity of the foaming plastic part can realize the shaping of the foaming layer.

[0034] Combination Figure 5 , Figure 8 , Fig.10As shown, the housing 100 involved in the present invention is formed with an exhaust hole 130 that connects the foaming cavity 10 with the external space of the housing 100 to allow the exhaust of air when the foaming material is foaming. Figure 2 , Figure 3 As shown, the foaming molded part involved in the present invention also has an anti-overflow mechanism 14 matched to the exhaust hole 130, and the anti-overflow mechanism 14 has a movable baffle 140 driven by the foaming material to rotate or translate to close the exhaust hole 130 when the foaming material foams.

[0035] Based on the design structure of the foaming plastic part provided by the present invention, the movable baffle 140 of the anti-overflow mechanism 14 is driven to rotate or translate by the foaming material. During the foaming process of the foaming material, the movable baffle 140 can move smoothly and then close the exhaust hole 130, which can effectively avoid the occurrence of overflow. In addition, due to the provision of the anti-overflow structure 14, the size of the exhaust hole 130 can be designed to be larger, thereby improving the exhaust effect of the foaming cavity 10 during the foaming process of the foaming material, and better ensuring the foaming uniformity in the foaming material.

[0036] In the specific implementation of the present invention, the aperture size of the exhaust hole 130 involved is not less than 3 mm. In some specific embodiments, the aperture size of the exhaust hole 130 is set to 8 mm, which is much larger than the size of no more than 1 mm in the prior art, and can ensure smooth exhaust.

[0037] As a preferred embodiment of the present invention, in the foaming cavity 10, the distribution density of the exhaust holes 130 increases gradually in the foaming direction of the foaming material. Figure 2 , Figure 3 As shown, in this specific embodiment, two injection holes 110 for injecting foaming material are formed at one end of the housing 100. When the foaming material is foaming, the foaming material injected into the foaming cavity 10 by the two injection holes 110 will foam in the respective corresponding areas to fill the foaming cavity 10; in the foaming cavity 10, the two injection holes 110 correspond to the first foaming direction d1 and the second foaming direction d2 respectively. In the foaming area corresponding to the first foaming direction d1, the distribution density of the exhaust holes 130 in the first foaming direction d1 shows a gradually increasing trend; correspondingly, in the foaming area corresponding to the second foaming direction d2, the distribution density of the exhaust holes 130 in the second foaming direction d2 also shows a gradually increasing trend.

[0038] Based on the above distribution of the exhaust holes 130, during the foaming process inside the foamed plastic part, when the exhaust holes 130 corresponding to the first foaming area are blocked and closed by the movable baffle 140, it will not cause too much impact on the exhaust effect in the subsequent foaming process.

[0039] Combination Figure 2 , Figure 3 , Figure 4As shown, in this specific embodiment, the foaming molded part has a ridge 13 protruding toward the inside of the foaming cavity 10, and the ridge 13 has a top wall 131 and side walls located on opposite sides of the top wall 131 and respectively connected to the housing 100. More specifically, the two sides of the top wall 131 are respectively connected to a first side wall 132 and a second side wall 133, and the first side wall 132 and the second side wall 133 are both connected to the main body 11 of the housing 100.

[0040] As further shown in the figure, the extending direction of the ridge 13 is consistent with the foaming direction of the foaming material, and the exhaust hole 130 is formed through the top wall 131. The arrangement of the ridge 13 in this embodiment can guide the foaming direction of the foaming material to a certain extent, so that the actual foaming direction of the foaming material during the foaming process can have a better coincidence with the theoretical foaming direction.

[0041] In some specific embodiments of the present invention, the movable baffle 140 is rotatably arranged along a rotation axis, the extension direction of the rotation axis is perpendicular to the extension direction of the ridge 13, and in the foaming direction of the foaming material, the rotation axis is located at the rear side of the corresponding exhaust hole 130. Based on this arrangement, the foaming material drives the movable baffle 140 to rotate before reaching the location of the exhaust hole 130, and then the movable baffle 140 smoothly blocks and closes the corresponding exhaust hole 130 during the foaming process.

[0042] Specific reference Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the rotating shaft involved in this embodiment is the first rotating shaft 141. Specifically, the first rotating shaft 141 is parallel to the plane where the top wall 131 of the ridge 13 is located or is located on the plane where the top wall 131 is located. The anti-overflow structure 14 also has side panels arranged on both sides of the movable baffle 140 to respectively cooperate with the two side walls when the movable baffle 140 closes the exhaust hole 130. Among them, the side panels include a first side panel 1421 that cooperates with the first side wall 132 and a second side panel 1422 that cooperates with the second side wall 133. The arrangement of the first side panel 1421 and the second side panel 1422 can effectively prevent the foaming material from overflowing from the side of the movable baffle 140 to the exhaust hole 130.

[0043] exist Figure 4 , Figure 5 , Figure 6 , Figure 7 In the illustrated embodiment, a first chamfer 1420 is formed on one side of the first side plate 1421 and the second side plate 1422 close to the ridge 13. During the foaming process of the foaming material, the setting of the first chamfer 1420 can effectively reduce the resistance generated between the first side plate 1421 and the second side plate 1422 and the foaming material during the rotation process.

[0044] In addition, it should be understood that when the foaming plastic part is foamed, the plane where the top wall 131 of the ridge 13 is located is usually parallel to the horizontal plane, and the initial position of the movable baffle 140 is usually roughly upright. In order to prevent the movable baffle 140 from spontaneously tilting toward the side of the corresponding exhaust hole 130, Figure 4 , Figure 5 , Figure 6 , Figure 7 In the illustrated embodiment, a gravity balancing portion 1423 is further disposed on the movable baffle 140 . The gravity balancing portion 1423 is disposed on a side of the movable baffle 140 that is away from the corresponding exhaust hole 130 .

[0045] refer to Figure 8 , Fig. 9 As shown, the rotating shaft involved in this embodiment is the second rotating shaft 143, and the second rotating shaft 143 is perpendicular to the plane where the top wall 131 of the convex ridge 13 is located. Specifically, one surface of the movable baffle 140 involved in this embodiment is in contact with the top wall 131 of the convex ridge 13, and the anti-overflow structure 14 has a force-bearing plate 144 fixed to the movable baffle 140 for contact during foaming to push the movable baffle 140 to rotate along the second rotating shaft 143. Usually, the plane where the force-bearing plate 144 is located is perpendicular to the plane where the movable baffle 140 is located.

[0046] It is relatively easy to understand that, based on the setting method of the movable baffle 140 involved in this embodiment, the plane where it is located is parallel to the foaming direction, and the force directly exerted on the movable baffle 140 by the foaming material during the foaming process is relatively small, which is not conducive to driving the movable baffle 140 to rotate; the setting of the force plate 144 in this embodiment can provide sufficient driving force for the rotation of the movable baffle 140 when the foaming material is foaming.

[0047] As a preference, Figure 8 , Fig. 9 In the embodiment shown, in the foaming direction of the foaming material, a baffle plate 145 is further provided at the rear side of the exhaust hole 130 for blocking the foaming material from flowing into the exhaust hole 130 before the corresponding movable baffle plate 140 blocks and closes the exhaust hole 130. In specific implementation, one side of the baffle plate 145 protrudes toward the direction where the exhaust hole 130 is located to form a limiting portion 1450, and the limiting portion 1450 is used to limit the movable baffle plate 140 from further rotating along the original rotation direction after the movable baffle plate 140 blocks and closes the exhaust hole 130.

[0048] In other embodiments of the present invention, the movable baffle 140 moves along the extending direction of the ridge 13 and is engaged with the top wall 131. Fig.10 , Fig.11 , Fig.12 As shown, in this specific embodiment, in the foaming direction of the foaming material, the anti-overflow mechanism 14 also has a push plate 146 connected to the rear side of the movable baffle 140.

[0049] The anti-overflow mechanism 14 also has side panels connected to both sides of the movable baffle 140 and respectively matched with the side walls. In this specific embodiment, the side panels include a third side panel 1471 matched with the first side wall 132 and a fourth side panel 1472 matched with the second side wall 133. The third side panel 1471 and the fourth side panel 1472 are arranged to effectively prevent the foaming material from overflowing from the side of the movable baffle 140 to the exhaust hole 130.

[0050] More specifically, the third side plate 1471 and the fourth side plate 1472 are respectively extended in a direction away from the corresponding side wall to form a flange 1470, and a slide groove is fixed in the foaming chamber 10 to cooperate with the flange 1470 and allow the flange 1470 to slide along the foaming direction. As shown in the figure, the slide groove is formed by bending the fixing plates 148 fixed on both sides of the convex ridge 130 in the direction of the convex ridge 13. The cooperation between the flange 1470 and the slide groove can limit the moving direction of the movable baffle 140 while preventing the movable baffle 140 from detaching from the convex ridge 13.

[0051] In some embodiments of the present invention not shown in the figure, the anti-overflow mechanism 14 may also have an initial fixing portion, which is used to limit the movable baffle 140 to a position where it does not block the closed exhaust hole 130 before the movable baffle 140 rotates. When the foaming material drives the movable baffle 140 to move, the initial fixing portion fails, and the movable baffle 140 can rotate smoothly. Based on this setting, it is possible to avoid the situation where the movable baffle 140 spontaneously blocks the closed exhaust hole 130 before the foaming material drives the movable baffle 140 to move.

[0052] The present invention also provides a refrigerator, which includes a box body and a door body hinged to the box body, wherein at least one of the box body and the door body is obtained by foaming the above foamed plastic parts.

[0053] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0054] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A foaming plastic part, comprising a shell, wherein a foaming cavity is formed inside the shell for foaming a foaming material, characterized in that: The shell is provided with an exhaust hole connecting the foaming cavity and the external space of the shell for exhausting air when the foaming material is foaming. The foaming plastic part is also provided with an anti-overflow mechanism matched with the exhaust hole. The anti-overflow mechanism is provided with a movable baffle driven by the foaming material to rotate or translate to close the exhaust hole when the foaming material is foaming. The foaming molding has a convex ridge protruding toward the inside of the foaming cavity, the extending direction of the convex ridge is consistent with the foaming direction of the foaming material, the convex ridge has a top wall, and the exhaust hole is formed through the top wall; One surface of the movable baffle is in contact with the top wall of the ridge, and the anti-overflow mechanism also has a push plate connected to the movable baffle for contacting and pushing the movable baffle to rotate or translate along the top wall when the foaming material foams.

2. The foamed plastic part according to claim 1, characterized in that: In the foaming cavity, in the foaming direction of the foaming material, the distribution density of the exhaust holes tends to gradually increase.

3. The foamed plastic part according to claim 1 or 2, characterized in that: The ridge has side walls located at opposite sides of the top wall and respectively connected to the housing.

4. The foamed plastic part according to claim 3, characterized in that: The movable baffle is rotatably arranged along a rotating shaft, the extending direction of the rotating shaft is perpendicular to the extending direction of the convex ridge, and in the foaming direction of the foaming material, the rotating shaft is located at the rear side of the corresponding exhaust hole.

5. The foamed plastic part according to claim 4, characterized in that: The rotating shaft is parallel to the plane where the top wall of the convex ridge is located or is located on the plane where the top wall is located. The anti-overflow mechanism also has side plates arranged on both sides of the movable baffle to respectively cooperate with the two side walls when the movable baffle closes the exhaust hole.

6. The foamed plastic part according to claim 4, characterized in that: The rotating shaft is perpendicular to the plane where the top wall of the ridge is located, and the anti-overflow mechanism has a force-bearing plate fixed to the movable baffle for contacting when the foaming material foams to push the movable baffle to rotate along the rotating shaft.

7. The foamed plastic part according to claim 6, characterized in that: In the foaming direction of the foaming material, a baffle is further provided on the rear side of the exhaust hole for blocking the foaming material from flowing into the exhaust hole before the corresponding movable baffle blocks and closes the exhaust hole.

8. The foamed plastic part according to claim 3, characterized in that: The movable baffle is moved along the extending direction of the convex ridge and is fitted on the top wall. In the foaming direction of the foaming material, the anti-overflow mechanism also has a push plate connected to the rear side of the movable baffle.

9. The foamed plastic part according to claim 8, characterized in that: The anti-overflow mechanism also has side plates connected to both sides of the movable baffle and respectively cooperate with the side walls. Each of the side plates protrudes in a direction away from the corresponding side wall to form a flange, and a sliding groove is fixed in the foaming cavity to cooperate with the flange and allow the flange to slide along the foaming direction.

10. A refrigerator, comprising a box body and a door body hinged to the box body, characterized in that: At least one of the box body and the door body is obtained by foaming the foamed plastic part described in any one of claims 1 to 9.

Images