A cabinet door with double-layer adhesive

Abstract

This utility model discloses a cabinet door with double-layer adhesive, belonging to the technical field of insulated cabinet doors, aiming to overcome the shortcomings of low production efficiency in existing cabinet doors. The cabinet door includes a frame and a double-glazed unit. The double-glazed unit includes a first glass and a second glass. A first adhesive is applied between the first glass and the frame, and a second adhesive, different from the first adhesive, is applied between the second glass and the frame. The initial curing time of the first adhesive is longer than that of the second adhesive. Utilizing the rapid curing characteristic of the second adhesive, a preliminary and stable bond between the double-glazed unit and the frame is achieved in a shorter time, allowing the cabinet door to quickly reach a state suitable for packaging and transportation. Simultaneously, the first adhesive can be a sealant with better sealing performance, ensuring the overall sealing effect of the cabinet door.

Description

Technical Field

[0001] This utility model belongs to the technical field of insulated cabinet doors, and relates to a cabinet door with double-layer adhesive. Background Technology

[0002] Existing freezer doors mainly consist of a frame and a double-glazed glass assembly, which is bonded to the frame with silicone sealant. However, the initial curing time of silicone sealant is 4-8 hours. Before the silicone sealant has initially cured, packaging and transportation cannot be carried out. The frame and double-glazed glass assembly need to be clamped together to wait for initial curing, which requires a large amount of storage space and significantly reduces the production efficiency of the freezer doors.

[0003] To address the above issues, Chinese patent literature discloses a glass cabinet door (authorization announcement number CN215108454U), which uses PUR adhesive instead of silicone adhesive to achieve rapid bonding between the insulating glass assembly and the frame. However, the sealing effect of PUR adhesive is not as good as that of silicone adhesive, resulting in poor sealing of the cabinet door. Under refrigeration conditions, condensation is prone to occur on the surface of the frame or insulating glass. Summary of the Invention

[0004] This utility model addresses the problems existing in the prior art by proposing a cabinet door with double-layer adhesive, aiming to overcome the shortcomings of low production efficiency in existing cabinet doors.

[0005] This utility model is implemented as follows: A cabinet door with double-layer adhesive includes a frame and a hollow glass assembly, the hollow glass assembly including a first glass and a second glass, characterized in that a first adhesive is provided between the first glass and the frame, and a second adhesive different from the first adhesive is provided between the second glass and the frame, wherein the initial curing time of the first adhesive is longer than that of the second adhesive.

[0006] The first adhesive is silicone adhesive, and the second adhesive is hot melt adhesive.

[0007] The first glass is the rear glass, and the second glass is the front glass.

[0008] The outer contour of the second glass is larger than that of the rear glass. The rear end of the frame has a rear support platform. The first glass is bonded to the rear support platform by a first adhesive, and the second glass is bonded to the front end face of the frame by a second adhesive.

[0009] The edge of the front glass is flush with the side of the frame.

[0010] The outer contour of the first glass is equal to the outer contour of the second glass. The front end of the frame has a front support platform. The second glass is bonded to the front support platform by a second adhesive, and the first glass is bonded to the frame by a first adhesive.

[0011] The frame includes a main frame and a rear cover plate. The rear cover plate includes a snap-fit ​​part and a blocking part. The snap-fit ​​part is snapped onto the rear end of the main frame, and the blocking part blocks the insulated glass assembly.

[0012] The inner edge of the rear cover plate has a chamfer.

[0013] The main frame has a mounting groove, the height of the outer side wall of the mounting groove is greater than the height of the inner side wall of the mounting groove, the outer side wall covers the outer side of the rear cover plate, the outer snap-fit ​​position of the rear cover plate and the outer side wall of the mounting groove is offset towards the rear of the frame relative to the inner snap-fit ​​position of the rear cover plate and the inner side wall of the mounting groove, the snap-fit ​​part is hollow, the rear end wall of the snap-fit ​​part has a deformation opening, and the end of the blocking part has a baffle rib protruding towards the hollow glass assembly.

[0014] The first adhesive fills the gap between the first glass and the main frame, and simultaneously bonds the first glass, the main frame and the back cover.

[0015] The present invention has the following advantages: a first adhesive with a long initial curing time is provided between the first glass and the frame, and a second adhesive with a short initial curing time is provided between the second glass and the frame. Utilizing the rapid curing characteristic of the second adhesive, a preliminary and stable bond between the insulating glass assembly and the frame is achieved in a shorter time, allowing the cabinet door to quickly reach a state suitable for packaging, transportation, and other operations. Simultaneously, the first adhesive can be a better sealing adhesive, ensuring the overall sealing effect of the cabinet door. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cabinet door structure in Example 1; Figure 2 This is an exploded structural diagram of the cabinet door in Example 1; Figure 3 This is a cross-sectional structural diagram of the cabinet door in Example 1; Figure 4 for Figure 3 A magnified view of part A in the middle; Figure 5 This is a structural schematic diagram of the frame in Embodiment 1; Figure 6 This is a schematic diagram of the cabinet door structure in Example 2; Figure 7 This is a schematic diagram of the exploded structure of the cabinet door in Example 2; Figure 8This is a cross-sectional structural diagram of the cabinet door in Example 2; Figure 9 for Figure 8 A magnified view of part B in the middle; Figure 10 This is a partial structural diagram of the cabinet door in Example 2; Figure 11 for Figure 10 A magnified view of part C in the middle; Figure 12 This is a schematic diagram of the main frame structure in Example 2.

[0017] Figure labeling: 100, frame; 110, rear support platform; 120, rear cover plate; 121, snap-fit ​​part; 122, blocking part; 123, deformation opening; 124, chamfer; 125, outer snap-fit ​​position; 126, inner snap-fit ​​position; 127, baffle; 130, main frame; 131, front support platform; 132, mounting groove; 200, insulated glass assembly; 210, first glass; 211, first adhesive; 220, second glass; 221, second adhesive. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Example

[0019] This embodiment provides a cabinet door with double-layer adhesive, such as... Figure 1-5 As shown, the device includes a frame 100 and an insulated glass assembly 200. The insulated glass assembly 200 includes a first glass 210 and a second glass 220. A sealing spacer layer is provided between the first glass 210 and the second glass 220. A first adhesive 211 is provided between the first glass 210 and the frame 100. A second adhesive 221, which is different from the first adhesive 211, is provided between the second glass 220 and the frame 100. The initial curing time of the first adhesive 211 is longer than that of the second adhesive 221.

[0020] A first adhesive 211 with a long initial curing time is applied between the first glass 210 and the frame 100, while a second adhesive 221 with a short initial curing time is applied between the second glass 220 and the frame 100. Utilizing the rapid curing characteristic of the second adhesive 221, a preliminary and stable bond is achieved between the insulating glass assembly 200 and the frame 100 in a short time, allowing the cabinet door to quickly reach a state suitable for packaging and transportation. Simultaneously, the first adhesive 211 can be a sealant with better sealing performance, ensuring the overall sealing effect of the cabinet door. Under refrigeration conditions, cold air is less likely to leak from the back of the cabinet door, and condensation is less likely to occur on the outside of the frame or insulating glass assembly. The combined use of the first adhesive 211 and the second adhesive 221 achieves both rapid bonding and fixation of the cabinet door, ensuring good sealing performance and improving the overall quality of the cabinet door, meeting market requirements for refrigerator doors in terms of production efficiency and product quality. Touching the adhesive with a finger; if the finger does not stick to the adhesive, the adhesive is considered to have initially cured. The cabinet door has double-layer adhesive. It can have only two layers of adhesive, or it can have an adhesive in addition to the first and second adhesives.

[0021] The first adhesive 211 is silicone sealant, and the second adhesive 221 is hot melt adhesive. Silicone sealant has excellent sealing properties; its molecular structure allows it to effectively fill the gap between the frame 100 and the first glass 210, forming a dense sealing layer that effectively prevents the penetration of gases and liquids. However, its curing process is relatively slow, gradually curing through a chemical reaction with moisture in the air, requiring a relatively long initial curing time. Hot melt adhesive, on the other hand, is a plastic adhesive whose physical state changes with temperature within a certain range. In its molten state, it has good fluidity, quickly wetting the contact surface between the frame 100 and the second glass 220, and rapidly curing upon cooling, achieving rapid bonding with a short initial curing time. Using silicone sealant as the first adhesive 211 between the first glass 210 and the frame 100, and hot melt adhesive as the second adhesive 221 between the second glass 220 and the frame 100, fully utilizes the different properties of the two adhesives, achieving a complementary effect. Hot melt adhesives can be polyurethane hot melt adhesives, EVA hot melt adhesives (ethylene-vinyl acetate), PA hot melt adhesives (polyamides), etc., among which polyurethane hot melt adhesives can be further refined into PUR adhesives (moisture-curing reactive polyurethane hot melt adhesives).

[0022] like Figure 2 , 4As shown, the first glass 210 is the rear glass pane, and the second glass 220 is the front glass pane. During installation, the first adhesive 211 is applied first, followed by the second adhesive 221, and then the insulating glass assembly 200 is placed. If the second adhesive 221 is applied first, the time required to apply the first adhesive 211 may cause the second adhesive 221 to partially cure. Silicone sealant has excellent sealing performance, but its curing speed is slow. The rear glass pane is relatively closer to the internal environment of the freezer and has extremely high requirements for sealing. Using silicone sealant can ensure long-term and effective prevention of cold air leakage from the freezer and the entry of outside air and moisture, maintaining the low temperature environment and insulation performance inside the freezer. Hot melt adhesive cures quickly. Since the front glass pane is on the exterior surface of the freezer, using hot melt adhesive for rapid bonding first allows the door to quickly achieve initial structural stability, meeting the needs of rapid production processes. In other optional embodiments, the first glass 210 can also be the front glass pane, and the second glass 220 can be the rear glass pane.

[0023] Furthermore, such as Figure 4 , 5 As shown, the outer contour dimensions of the second glass 220 are larger than those of the first glass 210, meaning the length and width of the second glass 220 are greater than those of the first glass 210. The rear end of the frame 100 has a rear support platform 110. The first glass 210 is bonded to the rear support platform 110 using a first adhesive 211, and the second glass 220 is bonded to the front end face of the frame 100 using a second adhesive 221. The large second glass 220, as an outer layer, can cover part of the front end face of the frame 100, providing both decoration and protection. After the rear support platform 110 is coated with the first adhesive 211, the adhesive 211 forms a closed ring, ensuring a sealing effect.

[0024] like Figure 1 As shown, the edge of the front glass panel is flush with the side of the frame 100. This flush design eliminates the seam on the front surface of the cabinet door, preventing dirt and grime from accumulating and improving the cabinet door's clean and aesthetically pleasing appearance. Example

[0025] The main difference between this embodiment and Embodiment 1 is based on the size of the first glass 210 and the second glass 220. In Embodiment 1, the first glass 210 and the second glass 220 are of different sizes, while in this embodiment, the first glass 210 and the second glass 220 are of equal size.

[0026] Specifically, such as Figure 6-12As shown, the outer contour dimension of the first glass 210 is equal to the outer contour dimension of the second glass 220. The front end of the frame 100 has a front support platform 131. The second glass 220 is bonded to the front support platform 131 by a second adhesive 221, and the first glass 210 is bonded to the frame 100 by a first adhesive 211. During installation, the second adhesive 221 is first applied to the front support platform 131, then the insulated glass assembly 200 is placed on it, and then the first adhesive 211 is applied. Applying the second adhesive 221 to the front support platform 131 and placing the insulated glass assembly 200 allows the second adhesive 221 to begin to cure initially, providing temporary fixation for the second glass 220.

[0027] like Figure 7-11 As shown, the frame 100 includes a main frame 130 and a rear cover plate 120. The rear cover plate 120 includes a snap-fit ​​part 121 and a blocking part 122. The snap-fit ​​part 121 is snapped onto the rear end of the main frame 130, and the blocking part 122 blocks the insulating glass assembly 200. The rear cover plate 120 is snapped onto the rear end of the main frame 130 through the snap-fit ​​part 121. Utilizing the characteristics of the snap-fit ​​structure, a quick and secure connection is achieved without the need for additional complex tools and a large number of fasteners. At the same time, the design of the blocking part 122 is based on the need to fix the insulating glass assembly 200. By blocking the insulating glass assembly 200, the blocking part 122 prevents it from moving within the frame 100, ensuring the stability of the entire cabinet door structure.

[0028] like Figure 9 , 11 As shown in Figure 12, the main frame 130 has a mounting groove 132. The height of the outer wall of the mounting groove 132 is greater than the height of the inner wall of the mounting groove 132. The outer wall covers the outer side of the rear cover plate 120, thus reducing the gaps in the side frame. The outer snap-fit ​​position 125 between the rear cover plate 120 and the outer wall of the mounting groove 132 is offset towards the rear of the frame 100 relative to the inner snap-fit ​​position 126 between the rear cover plate 120 and the inner wall of the mounting groove 132. The snap-fit ​​part 121 is hollow, and the rear end wall of the snap-fit ​​part 121 has a deformation opening 123. The inner edge of the rear cover plate 120 has a chamfer 124, which facilitates the installation of the rear cover plate 120. The end of the blocking part 122 has a baffle 127 protruding towards the hollow glass assembly 200, which can prevent the first adhesive 211 from overflowing.

[0029] like Figure 9As shown, the first adhesive 211 fills the gap between the first glass 210 and the main frame 130, simultaneously bonding the first glass 210, the main frame 130, and the rear cover 120. The primary purpose of filling the gap between the first glass 210 and the main frame 130 with the first adhesive 211 is to achieve a seal. The freezer door needs to have good sealing properties to prevent internal cold air leakage and the entry of outside air and moisture. Gaps are one of the main channels for cold air leakage and the intrusion of external factors. Filling these gaps with the first adhesive 211 can block them, forming an effective sealing barrier, meeting the basic requirements of freezer insulation and moisture prevention. The adhesive properties of the first adhesive 211 bond the first glass 210, the main frame 130, and the rear cover 120, tightly connecting these three components together to form a unified structure, enhancing the door's resistance to external forces. In other optional embodiments, the first adhesive 211 may only bond the first glass 210 and the main frame 130 or the first glass 210 and the rear cover 120.

Claims

1. A cabinet door having a double-layer bonding adhesive, comprising a frame (100) and a hollow glass assembly (200), the hollow glass assembly (200) comprising a first glass (210) and a second glass (220), characterized in that, A first adhesive (211) is provided between the first glass (210) and the frame (100), and a second adhesive (221) different from the first adhesive (211) is provided between the second glass (220) and the frame (100). The initial curing time of the first adhesive (211) is longer than that of the second adhesive (221).

2. The cabinet door having a double-stick adhesive according to claim 1, wherein, The first adhesive (211) is a silicone adhesive, and the second adhesive (221) is a hot melt adhesive.

3. The cabinet door having a double-stick adhesive according to claim 1, wherein, The first glass (210) is the rear glass, and the second glass (220) is the front glass.

4. The cabinet door having a double-stick adhesive according to claim 1, wherein, The outer contour of the second glass (220) is larger than that of the first glass. The rear end of the frame (100) has a rear support platform (110). The first glass (210) is bonded to the rear support platform (110) by a first adhesive (211), and the second glass (220) is bonded to the front end of the frame (100) by a second adhesive (221).

5. The cabinet door having a double-stick adhesive according to claim 4, wherein, The edge of the second glass is flush with the side of the frame (100).

6. The cabinet door having a double-stick adhesive according to claim 1, wherein, The outer contour of the first glass (210) is equal to the outer contour of the second glass (220). The front end of the frame (100) has a front support platform (131). The second glass (220) is bonded to the front support platform (131) by a second adhesive (221), and the first glass (210) is bonded to the frame (100) by a first adhesive (211).

7. The cabinet door having a double-stick adhesive according to claim 6, wherein, The frame (100) includes a main frame (130) and a rear cover plate (120). The rear cover plate (120) includes a snap-fit ​​part (121) and a blocking part (122). The snap-fit ​​part (121) is snapped onto the rear end of the main frame (130), and the blocking part (122) blocks the insulating glass assembly (200).

8. The cabinet door having a double-stick adhesive according to claim 7, wherein, The inner edge of the rear cover (120) has a chamfer (124).

9. The cabinet door having a double-stick adhesive according to claim 7, wherein, The main frame (130) has a mounting groove (132). The height of the outer wall of the mounting groove (132) is greater than the height of the inner wall of the mounting groove (132). The outer wall covers the outer side of the rear cover plate (120). The outer snap-fit ​​position (125) between the rear cover plate (120) and the outer wall of the mounting groove (132) is biased towards the rear of the frame (100) relative to the inner snap-fit ​​position (126) between the rear cover plate (120) and the inner wall of the mounting groove (132). The snap-fit ​​part (121) is hollow. The rear end wall of the snap-fit ​​part (121) has a deformation opening (123). The end of the blocking part (122) has a baffle (127) protruding towards the hollow glass assembly (200).

10. The cabinet door having a double-stick adhesive according to claim 7, wherein, The first adhesive (211) fills the gap between the first glass (210) and the main frame (130), and simultaneously bonds the first glass (210), the main frame (130) and the back cover plate (120).

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