Injection mold and injection method

Abstract

The application relates to an injection mold and an injection method. The injection mold comprises a first mold body, a second mold body and a plurality of sealing members; the second mold body and the first mold body are oppositely arranged in a first direction, and the second mold body and the first mold body form a cavity for edge forming of a glass assembly when being closed; the plurality of sealing members are connected with the first mold body or the second mold body; when the first mold body and the second mold body are closed, the plurality of sealing members are located on both sides of the cavity in a second direction, the sealing members are used for sealing the cavity, and the first direction intersects with the second direction. The injection mold improves the sealing performance of the cavity, so that the forming quality of the edge and the yield of the glass assembly are improved.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to an injection mold and an injection molding method. Background Technology

[0002] In the process of molding automotive glass assemblies, the glass is generally placed in a mold, and then molten plastic is injected into the mold cavity through an injection molding machine. After the injection material in the cavity cools down, the injection material connects the glass and the edging together. After the mold is opened, the glass assembly can be removed.

[0003] In related technologies, the sealing performance of the cavity is poor, and the injection material is prone to overflow from the cavity during the injection molding process, making it impossible to form a stable air pressure, which reduces the molding quality of the edge and results in a low yield rate of the glass assembly. Summary of the Invention

[0004] Therefore, it is necessary to provide an injection mold and injection method to improve the sealing performance of the cavity and form a stable air pressure in the cavity, so as to improve the molding quality of the edge banding and the yield of the glass assembly.

[0005] In a first aspect, this application provides an injection mold, comprising:

[0006] First motif;

[0007] The second mold body and the first mold body are arranged opposite to each other in a first direction. When the two mold bodies and the first mold body are closed, they form a cavity for edge forming of the glass assembly.

[0008] Multiple sealing elements are provided. When the first mold body and the second mold body are closed, the multiple sealing elements are located on both sides of the cavity in a second direction. The sealing elements are used to seal the cavity. The first direction intersects the second direction.

[0009] In one embodiment, the cavity has an annular structure, with a portion of the seal located between the glass of the glass assembly and the first mold body, and disposed around the circumferential inner side of the cavity; and / or, a portion of the seal is located between the glass and the second mold body, and disposed around the circumferential inner side of the cavity; and / or, a portion of the seal is located between the first mold body and the second mold body, and disposed around the circumferential outer side of the cavity.

[0010] In one embodiment, the first mold body and the second mold body are each provided with a sealing groove on opposite sides in the first direction, and the sealing element is installed in the sealing groove.

[0011] In one embodiment, the injection mold further includes a movable component, which is detachably connected to the first mold body or the second mold body; the sealing component includes a plurality of first sealing strips connected end to end, the sealing groove includes a first groove and a second groove that are interconnected, the first sealing strips are located in the first groove, the movable component is located in the second groove, the movable component and the first sealing strips are disposed opposite to each other in the second direction, and the movable component is used to press against the opposite ends of two adjacent first sealing strips.

[0012] In one embodiment, in the second direction, the opposite ends of two adjacent first sealing strips are at least partially stacked along the second direction and abut against the movable member.

[0013] In one embodiment, the seal further includes a second sealing strip located within the second groove, with the opposite ends of two adjacent first sealing strips abutting against each other. The second sealing strip abuts against the sidewall of two adjacent first sealing strips on one side in the second direction, and abuts against the movable member on the other side in the second direction.

[0014] In one embodiment, the width of the first sealing strip is K0, and the width of the first groove is K1, where 0.1mm ≤ K0 - K1 ≤ 0.3mm.

[0015] In one embodiment, the minimum distance between the side wall of the first groove away from the movable part and the movable part is K2, where 0.2mm≤2K0-K2≤0.5mm.

[0016] In one embodiment, the length of the overlapping portion of the opposite ends of two adjacent first sealing strips in the second groove is L1, the length of the second groove is L2, and L2-K0≥L1.

[0017] In one embodiment, the length of the second sealing strip is L3, and the lengths of the second sealing strip that overlap with the two adjacent first sealing strips in the length direction are L4 and L5, respectively, where L3≥L4+L5, L4≥3mm, and L5≥3mm.

[0018] In one embodiment, in the second direction, when the seal is located on the side of the cavity near the glass, the seal protrudes from the sealing groove in the first direction by 0.3mm-0.5mm; and / or, the distance between the seal and the cavity in the second direction is F1, 3mm≤F1≤8mm; and / or, the Shore hardness of the seal is A65-A85.

[0019] In one embodiment, the distance between the seal and the cavity in the second direction is F1, and when F1 < 3 mm, the width of the seal is 8 mm-15 mm.

[0020] In one embodiment, the seal includes a multi-layer sealing base layer stacked in the first direction.

[0021] In one embodiment, the hardness of the multilayer sealing base layer increases in the first direction along the direction away from the bottom wall of the sealing groove.

[0022] In one embodiment, one of the sealing base layers is located on one side of the sealing groove in the first direction, and the other side of the sealing base layer opposite to the sealing groove protrudes out of the sealing groove and is used to abut against the glass, the first mold or the second mold.

[0023] In one embodiment, one of the sealing base layers includes a flexible body and a plurality of reinforcing structures, the reinforcing structures being distributed at least on opposite sides of the flexible body along a second direction.

[0024] In one embodiment, in the second direction, when the seal is located on the side of the cavity away from the glass, the seal protrudes from the sealing groove in the first direction by 0.3mm-1mm; and / or, the distance between the seal and the cavity in the second direction is F2, F2≥10mm; and / or, the Shore hardness of the seal is between A60 and A100.

[0025] In one embodiment, an airbag is also included, the airbag being located within the sealing groove, one side of the airbag abutting against the seal in the first direction, the other side of the airbag abutting against the bottom wall of the sealing groove, and the airbag being connected to an external air supply system.

[0026] In one embodiment, the injection mold further includes a floating core, which is movably connected to the first mold body or the second mold body. When the first mold body and the second mold body are closed, they surround the floating core to form the cavity.

[0027] In one embodiment, the injection mold further includes a pressure relief assembly, and the second mold body is further provided with an installation cavity and an overflow groove. The installation cavity is used to install the pressure relief assembly, and the pressure relief assembly is used to control the connection and disconnection between the overflow groove and the cavity.

[0028] In one embodiment, the pressure relief assembly includes a plug and a first elastic member; at least a portion of the plug is located within the mounting cavity and is slidable relative to the second mold body along the first direction; the first elastic member is located within the mounting cavity, one end of the first elastic member abuts against the plug, and the other end of the first elastic member abuts against the inner wall of the mounting cavity, and the first elastic member has a tendency to push the plug in the first direction to disconnect the cavity from the overflow groove.

[0029] In one embodiment, the pressure relief assembly includes a pressure block, a second elastic element, and a cutter;

[0030] The pressure block and the cutter are spaced apart in the first direction. At least a portion of the pressure block is located in the mounting cavity and can slide relative to the second mold body in the first direction. An overflow channel is formed between the pressure block and the side wall of the mounting cavity. The overflow channel is used to connect the cavity and the overflow groove.

[0031] The pressure block and the cutter have a first inclined surface on the side that abuts against each other in the first direction. In the direction along the second direction from the second elastic member to the overflow channel, the first inclined surface is inclined toward the side closer to the overflow channel.

[0032] One end of the second elastic member in the second direction abuts against the side wall of the mounting cavity, and the other end of the second elastic member in the opposite direction abuts against the back of the cutter. The second elastic member in the second direction tends to push the cutter to cut off the overflow channel.

[0033] In one embodiment, the angle between the first inclined plane and the first direction is α, where α ≥ 75°.

[0034] In one embodiment, the cutting edge angle of the cutter is b, where b ≤ 30°.

[0035] In one embodiment, the overflow channel has a dimension of K3 in the second direction, where 1mm ≤ K3 ≤ 1.5mm.

[0036] In one embodiment, the first mold body and / or the second mold body are provided with an air pressure measuring hole and an air blowing hole. The air pressure measuring hole is used to measure the internal pressure of the cavity; the air blowing hole is connected to the cavity and is used to connect to an air-assisted device.

[0037] In one embodiment, the first mold body and the second mold body are provided with a communicating venting gap, venting groove and buffer groove on opposite sides in the first direction. The venting gap, the venting groove and the buffer groove are located on the circumferential outer side of the cavity and are arranged away from the cavity in sequence. The venting gap is in communication with the cavity. At least a portion of the buffer groove is arranged around the cavity. The buffer groove is in communication with the air blowing hole.

[0038] In one embodiment, in the first direction from the exhaust gap to the buffer groove, the dimensions of the exhaust gap, the exhaust groove, and the buffer groove decrease in the second direction.

[0039] In one embodiment, the first mold or the second mold is provided with a gate, and the projection of the gate on a plane perpendicular to the first direction is located within the projection range of the glass in the first direction.

[0040] In one embodiment, a capsule is further included, the capsule being located circumferentially inside the cavity. The first mold body and / or the second mold body are provided with a mounting groove, the capsule being located within the mounting groove. When the capsule is filled with a medium, at least a portion of the capsule protrudes from the mounting groove and abuts against the glass. In a second aspect, this application also provides an injection molding method applied to the injection mold described in any one of the first aspects, the injection molding method comprising the following steps:

[0041] S1. Melt the edge-sealing material in the injection molding machine;

[0042] S2. Place the glass between the first mold body and the second mold body, close the first mold body and the second mold body, and seal the cavity with a sealing member;

[0043] S3. Inflate the cavity for a preset time T1 to stabilize the pressure inside the cavity to P1, and then fill the cavity with the molten material in the injection molding machine through the flow channel;

[0044] S4. Depressurize the cavity to reduce the pressure inside the cavity from P1 to 0;

[0045] S5. After the molten material in the cavity cools and solidifies to form an edge, the first mold and the second mold are opened to remove the glass assembly.

[0046] The aforementioned injection mold is equipped with multiple sealing elements, which are connected to either the first mold body or the second mold body. When the first mold body and the second mold body are closed, the multiple sealing elements are located on both sides of the cavity in the second direction. The sealing elements are used to abut against the glass of the glass assembly or the first mold body and the second mold body to seal the cavity. That is, the multiple sealing elements are respectively arranged around the outer or inner side of the cavity, forming multiple seals for the cavity, preventing the injection material from overflowing from the cavity during the injection molding process, and forming a stable air pressure in the cavity, thereby improving the molding quality of the edge and the yield of the glass assembly. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure in which a cavity is formed when the mold is closed, according to one embodiment of this application.

[0048] Figure 2 This is a schematic diagram of the mold closing structure forming the edge in one embodiment of this application.

[0049] Figure 3 This is a schematic diagram of the sealing groove in one embodiment of this application.

[0050] Figure 4 This is a schematic diagram of the assembly of the seal in one embodiment of this application.

[0051] Figure 5 This is a schematic diagram of the assembly of the seal in another embodiment of this application.

[0052] Figure 6 This is a schematic diagram of the structure of the first sealing strip in one embodiment of this application.

[0053] Figure 7 This is a schematic diagram of the structure of the first sealing strip in another embodiment of this application.

[0054] Figure 8 This is a schematic diagram of the structure of a floating core in one embodiment of this application.

[0055] Figure 9 This is a schematic diagram of the pressure relief component in one embodiment of this application.

[0056] Figure 10 This is a schematic diagram of the structure of the pressure relief component cutting off the overflow channel in another embodiment of this application.

[0057] Figure 11 for Figure 10 A schematic diagram of the structure of the pressure relief component connecting the cavity and the overflow trough.

[0058] Figure 12 for Figure 10 A schematic diagram of the pressure relief assembly.

[0059] Figure 13 for Figure 10A schematic diagram of the stress analysis of the pressure block of the pressure relief component.

[0060] Figure 14 for Figure 10 A schematic diagram of the force analysis of the cutter in the pressure relief assembly.

[0061] Figure 15 This is a schematic diagram showing the distribution of gates when the mold is closed in one embodiment of this application.

[0062] Figure 16 This is a schematic diagram showing the positions of the gate and the edging in one embodiment of this application.

[0063] Figure 17 This is a schematic diagram of the suction cup assembly of the glass assembly in one embodiment of this application.

[0064] Figure 18 This is a schematic diagram of the air blowing hole in one embodiment of this application.

[0065] Figure 19 for Figure 18 A magnified view of a portion of point A in the middle.

[0066] Figure 20 This is a schematic diagram of the structure of the capsule in one embodiment of this application.

[0067] The attached figures are labeled as follows:

[0068] 1. First mold body; 2. Second mold body; 21. Mounting cavity; 22. Overflow groove; 23. Overflow channel; 3. Cavity; 4. Sealing element; 41. First sealing strip; 411. Sealing base layer; 4111. Flexible main body; 4112. Reinforcing structure; 42. Second sealing strip; 5. Sealing groove; 51. First groove body; 52. Second groove body; 6. Moving part; 7. Floating core; 8. Pressure relief assembly; 81. Block; 82. First elastic element; 83. Pressure block; 831. First inclined surface; 84. Second elastic element; 85. Cutter; 9. Suction cup assembly; 10. Airbag; 11. Gate; 12. Bag body; 121. Fixing part; 122. Deformation part; 13. Mounting groove; 14. Air blowing hole; 15. Exhaust gap; 16. Exhaust groove; 17. Buffer groove; 100. Glass; 200. Edge binding. Detailed Implementation

[0069] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0070] See Figure 1 and Figure 2 An embodiment of this application provides an injection mold including a first mold body 1, a second mold body 2, and a plurality of sealing elements 4. The first mold body 1 and the second mold body 2 are disposed opposite each other in a first direction, and when the first mold body 1 and the second mold body 2 are closed, they form a cavity 3 for molding the edge 200 of a glass assembly. The plurality of sealing elements 4 are used to seal the cavity 3, and the sealing elements 4 are disposed on the first mold body 1 or the second mold body 2. When the first mold body 1 and the second mold body 2 are closed, the plurality of sealing elements 4 are located on both sides of the cavity 3 in a second direction, and the sealing elements 4 are used to abut against the glass 100 of the glass assembly, the first mold body 1, or the second mold body 2 to seal the cavity 3. In this application, when the sealing element 4 is connected to the first mold body 1, the side of the sealing element 4 facing away from the first mold body 1 abuts against the second mold body 2 or against the glass 100 of the glass assembly. When the sealing element 4 is connected to the second mold body 2, the side of the sealing element 4 facing away from the second mold body 2 abuts against the first mold body 1 or against the glass 100 of the glass assembly. When the first mold body 1 and the second mold body 2 are closed, multiple sealing elements 4 are arranged on both sides of the cavity 3 in the second direction. The multiple sealing elements 4 are respectively arranged around the outer or inner side of the cavity 3 to form multiple seals for the cavity 3, preventing the injection material from overflowing from the cavity 3 during the injection molding process of the edge banding 200. Stable air pressure can be formed in the cavity 3, which improves the molding quality of the edge banding 200 and the yield of the glass assembly.

[0071] It should be noted that the first direction is the height direction of the first mold 1 (X-axis direction in the figure), and the second direction is the length or width direction of the first mold 1 (Y-axis direction in the figure). The first and second directions intersect. Figure 2 As shown, the cavity 3 has an annular structure and is arranged around the glass 100 to form an annular edging 200 at the edge of the glass 100. A partial seal 4 is located between the glass 100 and the first mold body 1, and is arranged around the circumferential inner side of the cavity 3; and / or, a partial seal 4 is located between the glass 100 and the second mold body 2, and is arranged around the circumferential inner side of the cavity 3; and / or, a partial seal 4 is located between the first mold body 1 and the second mold body 2, and is arranged around the circumferential outer side of the cavity 3. This allows at least one of the first mold body 1 or the second mold body 2 to form a seal with the glass 100 on one side in the first direction. Because the cavity 3 has an annular structure, the side of the cavity 3 radially closer to the center is the circumferential inner side of the cavity 3, and the side of the cavity 3 radially farther from the center is the circumferential outer side of the cavity 3. Figure 2 Only a partial structure of cavity 3 is shown in the image.

[0072] Furthermore, such as Figure 1 and Figure 2As shown, to facilitate rapid connection between the first mold body 1 and the second mold body 2 and the sealing element 4, in one embodiment, the first mold body 1 and the second mold body 2 each have a sealing groove 5 on opposite sides in a first direction. The sealing element 4 is installed in the sealing groove 5. The sealing element 4 is made of a flexible material such as fluororubber, silicone, TPE, or PVC, and it is interference-fitted with the sealing groove 5, allowing for rapid installation of the sealing element 4. In some other embodiments, the first mold body 1 and the second mold body 2 have a protrusion corresponding to the shape of the sealing element 4 on opposite sides. The sealing element 4 can also be quickly connected to the first mold body 1 and the second mold body 2 using a high-temperature resistant adhesive. The connection method between the sealing element 4 and the first mold body 1 and the second mold body 2 can be adaptively adjusted according to actual design requirements.

[0073] like Figure 2 and Figure 4 As shown, the edging 200 is located at the edge of the glass 100. When the overall area of ​​the glass 100 is large, the perimeter of the edging 200 is long. In this case, the seal 4 is annular and the perimeter increases synchronously, making it impossible to integrally form the seal 4. In one embodiment, the seal 4 includes multiple first sealing strips 41 connected end to end, i.e., the seal 4 is formed by splicing multiple first sealing strips 41 connected end to end. To ensure a tight splice between adjacent first sealing strips 41 and avoid gaps at the splice point of adjacent first sealing strips 41, which would prevent sealing of the cavity 3, in one embodiment, the injection mold also includes a movable part 6. The sealing groove 5 includes a first groove 51 and a second groove 52 that are interconnected, wherein the first sealing strip 41 is located within the first groove 51. The second groove 52 is mainly used to accommodate the splice point of adjacent first sealing strips 41 and cooperates with the movable part 6 to ensure seamless splicing of adjacent first seals 4 in the length direction. Figure 5 As shown, the movable part 6 is located in the second groove 52. The movable part 6 and the first sealing strip 41 are arranged opposite to each other in the second direction. The movable part 6 is used to press the opposite ends of two adjacent first sealing strips 41.

[0074] Furthermore, such as Figure 3 and Figure 4 As shown, to avoid gaps at the joint of two adjacent first sealing strips 41, which could cause the sealing element 4 to partially break and fail to seal the cavity 3, in one embodiment, the opposing ends of two adjacent first sealing strips 41 are at least partially stacked along the second direction and abut against the movable member 6. That is, the ends of two adjacent sealing elements 4 are partially stacked in the second direction, and the movable member 6 deforms the stacked portion of the ends of the two adjacent sealing elements 4 by pressing along the direction close to the first groove 51 in the second direction, so that the joint of the two adjacent first sealing strips 41 is seamlessly connected.

[0075] In the above embodiment, the end of the first sealing strip 41 near the second groove 52 undergoes multiple bending deformations. Under the extrusion force of the moving part 6, the end of the first sealing strip 41 is prone to stress concentration and fracture, reducing the overall service life of the sealing part 4. Figure 5 As shown, furthermore, to improve the service life of the seal 4, in another embodiment, the seal 4 also includes a second sealing strip 42. The second sealing strip 42 is used to cooperate with the movable member 6 to compress and fix the joint of two adjacent first sealing strips 41, avoiding gaps at the joint of two adjacent first sealing strips 41, and preventing bending of the ends of the first sealing strips 41 near the second groove 52. Specifically, as Figure 5 As shown, the second sealing strip 42 is located within the second groove 52, with the opposite ends of two adjacent first sealing strips 41 abutting against each other. The second sealing strip 42 abuts against the sidewall of the two adjacent first sealing strips 41 on one side in the second direction, and against the movable member 6 on the other side in the second direction. In the second direction, from the second groove 52 to the first groove 51, the pressure applied by the movable member 6 to the second sealing strip 42 is directly transmitted to the sidewall of the two adjacent first sealing strips 41 located within the first groove 51, preventing bending at the ends between the two adjacent first sealing strips 41 and improving the overall stability and service life of the sealing member 4.

[0076] It should be noted that in the above embodiments, the movable part 6 is located within the second groove 52 and can slide along the second direction. The movable part 6 can be located on the first mold body 1 and / or the second mold body 2, and is detachably connected to the corresponding mold via screws. A strip-shaped hole extending along the second direction can be provided on the movable part 6 to make its position adjustable in the second direction, thereby pressing the joint of two adjacent first sealing strips 41. It should also be noted that since the sealing part 4 has an overall annular structure, the number of first sealing strips 41 is N (N is an integer greater than or equal to 2), and the number of second sealing strips 42 and movable parts 6 is also N. The number of second sealing strips 42, movable parts 6, and second grooves 52 changes synchronously with the number of first sealing strips 41. For example, in one embodiment, the sealing part 4 is formed by splicing two first sealing strips 41, and the two first sealing strips 41 have two joints. In this case, the number of second grooves 52, movable parts 6, and second sealing strips 42 is also two.

[0077] Furthermore, in order to ensure that the first sealing strip 41 can be installed within the first groove 51 and to prevent it from coming out of the first groove 51, the first sealing strip 41 and the first groove 51 are connected by an interference fit. For example... Figure 3 and Figure 4As shown, in one embodiment, the width of the first sealing strip 41 is K0, and the width of the first groove 51 is K1, where 0.1mm ≤ K0 - K1 ≤ 0.3mm. When K0 - K1 is less than 0.1mm, the interference between the first sealing strip 41 and the first groove 51 is small, and the first sealing strip 41 is prone to loosening and falling off during the movement of the first mold 1 or the second mold 2. When K0 - K1 is greater than 0.3mm, the interference between the first sealing strip 41 and the first groove 51 is large, and the first sealing strip 41 is prone to jamming during installation in the first groove 51, reducing the installation efficiency of the first sealing strip 41. When 0.1mm ≤ K0 - K1 ≤ 0.3mm, the risk of the first sealing strip 41 loosening from the first groove 51 is reduced, and assembly is easier, improving assembly efficiency. K0 - K1 = 0.1mm, 0.2mm, or 0.3mm, and the value of K0 - K1 can be adaptively adjusted according to actual assembly requirements.

[0078] Furthermore, such as Figure 3 As shown, the ends of two adjacent first sealing strips 41 are located between the first groove 51 and the movable member 6. To ensure the movable member 6 can press against the ends of the adjacent first sealing strips 41, the minimum distance between the side wall of the first groove 51 away from the movable member 6 and the movable member 6 is K2, where 0.2mm ≤ 2K0 - K2 ≤ 0.5mm. That is, in the second direction, the overlapping portion of the ends of the two adjacent first sealing strips 41 is located within a restricted area formed by the side wall of the first groove 51 facing away from the second groove 52 and the side wall of the movable member 6 facing the first groove 51. The dimension of this restricted area in the second direction is K2, where 0.2mm ≤ 2K0 - K2 ≤ 0.5mm, so that the overlapping portion of the ends of the two adjacent first sealing strips 41 is interference-fitted within this restricted area. When 2K0 - K2 < 0.2mm, the ends of the two adjacent first sealing strips 41 can easily detach from the restricted area. When 2K0-K2 > 0.5mm, the compressive force exerted by the moving part 6 on the first sealing strip 41 is excessive, which can easily cause plastic deformation of the first sealing strip 41, affecting the sealing effect at the joint of two adjacent first sealing strips 41. When 0.2mm ≤ 2K0-K2 ≤ 0.5mm, it can prevent the overlapping part of two adjacent first sealing strips 41 from loosening, while maintaining a good sealing effect at the joint of two adjacent first sealing strips 41. 2K0-K2 = 0.2mm, 0.3mm, 0.4mm, or 0.5mm, and the value of 2K0-K2 can be adaptively adjusted according to actual assembly requirements.

[0079] Furthermore, to ensure sufficient overlap length between the opposing ends of two adjacent first sealing strips 41 to meet the sealing requirements after splicing the two adjacent first sealing strips 41, in one embodiment, the length of the overlap portion of the opposing ends of the two adjacent first sealing strips 41 within the second groove 52 is L1, the length of the second groove 52 is L2, and L2-K0≥L1. Figure 4 As shown, the first sealing strip 41, with its end located within the second groove 52, has an inclined deformation section. When L2-K0 is less than L1, the length of the deformation section is short, and there is a gap between the first sealing strip 41 with its end located within the first groove 51 and the deformation section, which can easily lead to uneven local stress and breakage of the deformation section. When L2-K0=L1, there is no gap between the sealing strip with its end located within the first groove 51 and the deformation section. At this time, the stress is uniform throughout the deformation section, improving the stability of the joint structure of two adjacent first sealing strips 41.

[0080] Furthermore, such as Figure 5 As shown, to ensure that the second sealing strip 42 can simultaneously press the two first sealing strips 41 within the second groove 52, in one embodiment, the length of the second sealing strip 42 is L3, and the lengths of the second sealing strip 42 that overlap with the two adjacent first sealing strips 41 in the length direction are L4 and L5, respectively, where L3 ≥ L4 + L5, L4 ≥ 3 mm, and L5 ≥ 3 mm. This allows the second sealing strip 42 to press the first sealing strip 41.

[0081] It should be noted that in some embodiments of this application, the number of sealing elements 4 is at least three. Two sealing elements 4 are spaced apart in the first direction and are connected to the first mold 1 and the second mold 2 in a one-to-one correspondence. Both sealing elements 4 are located on the side of the cavity 3 near the glass 100 in the second direction, and the two sealing elements 4 are arranged facing each other to abut against the opposite sides of the glass 100 in the first direction, so as to seal the side of the cavity 3 near the glass 100 in the second direction. Specifically, one sealing element 4 is located between the first mold 1 and the glass 100, and another sealing element 4 is located between the second mold 2 and the glass 100. The remaining sealing element 4 is located on the first mold 1 or the second mold 2, and is located on the other side of the cavity 3 away from the glass 100 in the second direction, for abutting against the opposite sidewall of the first mold 1 or the second mold 2 in the first direction. Specifically, the sealing element 4 is located between the first mold body 1 and the second mold body 2. One side of the sealing element 4 in the first direction is connected to the first mold body 1, and the other side of the sealing element 4 in the opposite direction in the first direction abuts against the second mold body 2, so as to seal the side of the sealing cavity 3 away from the glass 100 in the second direction. The sealing of the cavity 3 is completed by the three sealing elements 4.

[0082] In some other embodiments, to accommodate different sealing scenarios of the cavity 3, the sealing elements 4 located on the first mold 1 and the second mold 2 and used to abut against the glass 100 may also be staggered in the first direction. Meanwhile, the number of sealing elements 4 used to abut against the sidewalls of the first mold 1 or the second mold in the first direction may be multiple, and they may be individually provided on the first mold 1 or the second mold 2, or may coexist on both the first mold 1 and the second mold 2.

[0083] Furthermore, in the second direction, when the seal 4 is located on the side of the cavity 3 near the glass 100, one side of the seal 4 in the first direction is connected to the first mold body 1 or the second mold body 2, and the other side is used to abut against the glass 100. To ensure that the seal 4 protrudes sufficiently from the sealing groove 5, not only is damage to the glass 100 avoided, but the material cost of the seal 4 is also reduced. In one embodiment, the dimension of the seal 4 protruding from the sealing groove 5 in the first direction is 0.3mm-0.5mm; and / or, the distance between the seal 4 and the cavity 3 in the second direction is F1, where 3mm≤F1≤8mm; and / or, the Shore hardness of the seal 4 is between A65 and A85.

[0084] It should be noted that when the dimension of the seal 4 protruding from the sealing groove 5 in the first direction is less than 0.3mm, the seal 4 cannot provide sufficient pre-compression during the mold closing stage of the first mold body 1 and the second mold body 2. This results in a slight gap between the glass 100 and the seal 4, which can easily lead to material leakage during high-pressure injection molding, reducing the reliability of the seal. When the dimension of the seal 4 protruding from the sealing groove 5 in the first direction is greater than 0.8mm, it prevents excessive initial interference between the seal 4 and the mold, which could cause excessive shearing, rolling, or uneven crushing of the seal 4, affecting the uniformity of the seal and its service life. Therefore, the dimension of the seal 4 protruding from the sealing groove 5 in the first direction can be selected as 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, and 0.8mm. The dimension of the seal 4 protruding from the sealing groove 5 in the first direction can be adaptively adjusted according to the actual application scenario.

[0085] like Figure 2As shown, the distance between the seal 4 and the cavity 3 in the second direction is F1. When F1 < 3 mm, the seal 4 is too close to the cavity 3. The high temperature and pressure during the injection molding of the edge banding 200 act on the seal 4, making it prone to deformation in the second direction. This can lead to instability of the sealing interface and even intrusion into the cavity 3, causing distortion of the edge contour and affecting the injection molding of the edge banding 200. When F1 < 3 mm, to improve the stability of the seal 4 in the second direction, the size of the seal 4 in the second direction can be increased to 8 mm-15 mm. By increasing the size of the seal 4 in the second direction, the deformation of the seal 4 in the second direction can be effectively suppressed, thus preventing its impact on the sealing effect of the cavity 3 and the injection molding of the edge banding 200. The width of the seal 4 can be selected as 8 mm, 10 mm, 12 mm, or 15 mm, and can be adjusted according to actual design requirements. When F1 > 8 mm, the distance between the seal 4 and the cavity 3 is relatively large, which increases the volume of the ineffective cavity between the glass 100 and the cavity 3. This can easily lead to uneven cooling gradient of the molten plastic in the cavity 3, causing deterioration of the stress distribution within the edge 200 and the risk of surface shrinkage marks. Therefore, the distance F1 between the seal 4 and the cavity 3 in the second direction can be selected as 3 mm, 5 mm, 6 mm, or 8 mm, and can be adaptively adjusted according to actual design requirements.

[0086] Furthermore, since the first mold body 1, the second mold body 2, and the glass 100 are sealed by a seal 4, the Shore hardness of the seal 4 is between A65 and A85. When the Shore hardness of the seal 4 is less than A65, its material stiffness is insufficient and its elastic recovery ability is weak. During assembly pre-tightening and mold closing, the seal 4 is prone to plastic deformation, resulting in excessive initial compression deformation and excessively wide sealing contact line, which in turn reduces the effective sealing pressure per unit area and decreases the airtightness. In addition, after high-temperature molding and subsequent mold opening and unloading, the seal 4 is difficult to spring back to its initial state, causing continuous deterioration of the sealing function. After multiple mold closing and opening, the accumulated plastic deformation will cause the seal 4 to fail, failing to meet the long-term use requirements of the seal 4.

[0087] like Figure 2 , Figure 6 and Figure 7As shown, when F1 < 3mm, further, in order to ensure that the seal 4 meets both elasticity requirements and high strength, in one embodiment, the seal 4 includes multiple layers of sealing base layers 411 stacked in the first direction. The materials and thicknesses of the multiple layers of sealing base layers 411 can be different to provide different compression amounts under different pressures to meet the sealing requirements of the seal 4. Furthermore, to prevent the sealing base layers 411 that abut against the glass 100, the first mold 1, or the second mold 2 from being damaged or stuck by the edge material, while also meeting the elastic deformation requirements, the hardness of the multiple layers of sealing base layers 411 increases in the first direction away from the bottom wall of the sealing groove 5. That is, the deformation of the top sealing base layer 411 is smaller than that of the other sealing base layers 411, resulting in better structural strength. This prevents damage and sticking from the edge material, improving the overall sealing stability of the seal 4.

[0088] like Figure 6 and Figure 7 As shown, to prevent the sealing base layer 411 in contact with the glass 100, the first mold 1, or the second mold 2 from separating from other sealing base layers 411, in another embodiment, one side of one of the sealing base layers 411 is located in the sealing groove 5 in the first direction, and the other side of the sealing base layer 411 protrudes out of the sealing groove 5 in the opposite direction and is used to abut against the glass 100, the first mold 1, or the second mold 2. If the sealing base layer 411 in contact with the first mold 1 or the second mold 2 of the glass 100 is entirely located outside the sealing groove 5, the sealing base layer 411 is easily affected by the impact load in the second direction and separates from other base layers, affecting the overall structural stability of the seal 4. The sealing base layer 411 is located at the top of the sealing groove 5, and compared with other sealing base layers 411, it bears the impact load in the second direction and the mold closing pressure in the first direction during the forming of the edge banding 200, and needs to have strong hardness to avoid the impact breakage of the edge banding material.

[0089] like Figure 6 and Figure 7As shown, in one embodiment, the sealing base layer 411 consists of three layers. In the first direction, one side of the topmost sealing base layer 411 is located within the sealing groove 5, and the other side protrudes outside the sealing groove 5. The topmost sealing base layer 411 has high hardness and can be made of a material with a Shore hardness greater than A90 (such as EPDM or TPU). The sealing base layer 411 located within the sealing groove 5 has lower hardness to accommodate the edge tolerance of the glass 100, mold deformation, and compression and springback requirements in the edge-wrapping 200 process, ensuring continuous adhesion and uniform pressure distribution at the sealing interface. Specifically, the thickness of the topmost sealing base layer 411 is greater than 5 mm to provide sufficient structural rigidity and buffer margin, preventing instability or penetrating deformation under dynamic loads. The thickness of the two sealing base layers 411 located within the sealing groove 5 is less than 2 mm, making it easy to fully insert into the sealing groove 5 and reducing assembly difficulty.

[0090] It should be noted that when the seal 4 is formed by stacking multiple layers of sealing base layer 411, the multiple layers of sealing base layer 411 can be formed by bonding or vulcanization process.

[0091] Furthermore, to increase the hardness of the topmost sealing base layer 411 and reduce the deformation of the sealing base layer 411 in the second direction during the forming of the edge 200, thus avoiding damage caused by local stress concentration, in one embodiment, the sealing base layer 411 includes a flexible body 4111 and a reinforcing structure 4112. The reinforcing structure 4112 is made of a rigid material (such as metal / high-strength engineering plastic or fiber-reinforced composite material). The flexible body 4111 is used to fit and seal with the glass 100, the first mold 1, or the second mold 2. The reinforcing structure 4112 is distributed at least on both sides of the flexible body 4111 opposite to each other in the second direction to bear the lateral constraint force and bending load during the forming of the edge 200, thereby improving the bending stiffness and dimensional stability of the sealing base layer 411 in the second direction.

[0092] like Figure 2 As shown, in the second direction, when the seal 4 is located on the side of the cavity 3 away from the glass 100, during mold closing, the seal 4 contacts the side wall of the first mold body 1 or the second mold body 2. This is to ensure that the seal 4 has sufficient deformation to form a seal between the side wall of the first mold body 1 and the second mold body 2 and the edge of the cavity 3. The seal 4 protrudes from the sealing groove 5 by 0.3mm-1mm in the first direction; and / or, the distance between the seal 4 and the cavity 3 in the second direction is F2, where F2 ≥ 10mm; and / or, the Shore hardness of the seal 4 is between A60 and A100.

[0093] It should be noted that when the dimension of the seal 4 protruding from the sealing groove 5 in the first direction is less than 0.3mm, the seal 4 cannot provide sufficient pre-compression during the mold closing stage of the first mold body 1 and the second mold body 2. This results in a small gap between the seal 4 and the first mold body 1 and the second mold body 2, which can easily lead to material leakage during high-pressure injection molding, reducing the reliability of the seal. When the dimension of the seal 4 protruding from the sealing groove 5 in the first direction is greater than 1mm, it prevents excessive initial interference between the seal 4 and the mold, which could cause excessive shearing, rolling, or uneven crushing of the seal 4, affecting the uniformity of the seal and its repeated service life. Specifically, the dimension of the seal 4 protruding from the sealing groove 5 in the first direction can be selected as 0.3mm, 0.5mm, 0.6mm, or 0.8mm.

[0094] The distance between the seal 4 and the cavity 3 in the second direction is F2, where F2 ≥ 10mm. A certain distance must be maintained between the seal 4 and the edge of the cavity 3. The main purpose of this distance is to provide ample space for the radial deformation of the seal 4 under pressure, avoiding excessive squeezing into the cavity 3 area and affecting the product contour or causing unintended contact. It also provides a buffer margin for mold processing, assembly errors, and thermal expansion. Furthermore, the Shore hardness of the seal 4 is controlled between A60 and A100. This hardness range balances the elasticity and pressure resistance of the seal 4: too low a hardness (e.g., below A60) may cause excessive deformation, insufficient rebound, or easy extrusion of the seal 4 under mold closing pressure; too high a hardness (e.g., above A100) may reduce conformability, affect sealing uniformity, and even damage the mold surface. A hardness of A60-A100 allows the seal 4 to maintain good rebound while possessing sufficient resistance to permanent deformation and wear resistance, adapting to repeated mold closing conditions. The Shore hardness of seal 4 can be selected from A60, A80, A90 or A100, etc., and can be adjusted according to actual needs.

[0095] like Figure 8As shown, after the edge banding 200 is formed in the cavity 3, in order to improve the demolding efficiency of the edge banding 200, in one embodiment, the injection mold further includes a floating core 7. The floating core 7 is movably connected to the first mold body 1 or the second mold body 2. When the first mold body 1 and the second mold body 2 are closed, they surround the floating core 7 to form the cavity 3. After the edge banding 200 is injected, filled and held under pressure, before the first mold body 1 and the second mold body 2 are opened, the floating core 7 moves in a predetermined direction (i.e., towards the direction away from the center of the cavity 3) under the drive of the power source; this creates a small gap between the floating core 7 and the edge banding 200, realizing active pressure relief in a local area of ​​the edge banding 200, significantly reducing the interface adhesion and frictional resistance between the edge banding 200 and the core; after the pressure relief is completed, the ejection system is activated to eject the edge banding 200 as a whole, thereby effectively avoiding demolding defects such as deformation and tearing of the edge banding 200, and improving the demolding stability and cycle efficiency of the edge banding 200. The floating core 7 moves away from the cavity 3 to relieve pressure in the cavity 3, facilitating subsequent demolding and ejection of the edge banding 200. The floating core 7 can be driven by an electric, hydraulic, or pneumatic power source. Furthermore, to limit the movement of the floating core 7, the injection mold also includes a limiting structure, in which the power output end of the power source (such as a lead screw or push rod) passes through a limiting hole in the limiting structure and connects to the floating core 7. The external dimensions of the floating core 7 are larger than the opening size of the limiting hole, thereby limiting the movement of the floating core 7.

[0096] Furthermore, in order to depressurize the cavity 3 after the edge banding 200 is injection molded, in some embodiments, such as... Figures 9 to 13 As shown, the injection mold also includes a pressure relief assembly 8. The second mold body 2 is further provided with a mounting cavity 21 and an overflow groove 22. The mounting cavity 21 is used to install the pressure relief assembly 8, and the pressure relief assembly 8 is used to control the connection and disconnection between the overflow groove 22 and the cavity 3.

[0097] like Figure 9 As shown, to simplify the structure of the pressure relief assembly 8, in one embodiment, the pressure relief assembly 8 includes a plug 81 and a first elastic member 82. At least a portion of the plug 81 is located within the mounting cavity 21 and can slide relative to the second mold body 2 along a first direction; the first elastic member 82 is located within the mounting cavity 21, one end of the first elastic member 82 abuts against the plug 81, and the other end of the first elastic member 82 abuts against the inner wall of the mounting cavity 21. The first elastic member 82 has a tendency to push the plug 81 in the first direction to disconnect the cavity 3 from the overflow groove 22. Figure 9As shown, in the early stage of injection molding at the edge 200, the pressure exerted by the cavity 3 on the plug 81 is less than the elastic force of the first elastic element 82. At this time, the cavity 3 and the overflow groove 22 are disconnected. As the amount of molten material in the cavity 3 increases, the pressure in the cavity 3 continuously increases. When the pressure exerted by the cavity 3 on the plug 81 is equal to the elastic force of the first elastic element 82, the plug 81 tends to move away from the cavity 3. When the pressure in the cavity 3 further increases, the pressure exerted by the cavity 3 on the plug 81 pushes the first elastic element 82 to compress, pushing the plug 81 to connect the cavity 3 with the overflow groove 22. The molten material is discharged through the overflow groove 22, realizing automatic pressure relief.

[0098] like Figure 10 As shown, since the overflow groove 22 is connected to the cavity 3 for pressure relief, after the molten material cools, the edge banding 200 in the cavity 3 solidifies and is integrally connected with the solidified waste in the overflow groove 22. Therefore, after mold opening, the edge banding 200 and the solidified waste in the cavity 3 need to be removed simultaneously, reducing the removal efficiency of the edge banding 200. In addition, after the edge banding 200 is removed, it also needs to be separated from the solidified waste, increasing the process difficulty. Further, in one embodiment, the pressure relief component 8 includes a pressure block 83, a second elastic element 84, and a cutter 85. An overflow channel 23 is formed between the pressure block 83 and the side wall of the mounting cavity 21. The overflow channel 23 is used to connect the cavity 3 and the overflow groove 22. The cutter 85 is set on the flow path of the overflow channel 23. The cutter 85 controls the opening and closing of the overflow channel 23, thereby controlling the opening and closing of the cavity 3 and the overflow groove 22. The cutter 85 is also used to separate the edge banding 200 from the solidified waste before mold opening.

[0099] Specifically, such as Figure 10 and Figure 12 As shown, the pressure block 83 and the cutter 85 are spaced apart in the first direction. At least a portion of the pressure block 83 is located in the mounting cavity 21 and can slide relative to the second mold body 2 in the first direction. A first inclined surface 831 is provided on the side of the pressure block 83 that abuts against the cutter 85 in the first direction. In the second direction, from the second elastic member 84 towards the overflow channel 23, the first inclined surface 831 is inclined towards the side closer to the overflow channel 23. One end of the second elastic member 84 abuts against the side wall of the mounting cavity 21 in the second direction, and the other end of the second elastic member 84 abuts against the back of the cutter 85 in the second direction. The second elastic member 84 has a tendency to push the cutter 85 to cut off the overflow channel 23 in the second direction. Figure 12As shown, to limit the movement of the cutter 85 in the first direction, a second inclined surface 211 is provided on the side of the mounting cavity 21 opposite to the cutter 85 in the first direction. In the direction along the second direction from the second elastic member 24 to the overflow channel 23, the second inclined surface 211 is inclined towards the side closer to the overflow channel 23. Furthermore, to prevent the second elastic member 84 from being over-compressed, causing the overflow channel 23 to open too wide, it is necessary to limit the extreme positions of the pressure block 83 and the cutter 85. In one embodiment, such as... Figure 12 As shown, the bottom of the mounting cavity 21 is provided with a limiting groove 222, which is used to limit the leftward and downward movement of the cutter 85.

[0100] like Figure 13 and Figure 14 As shown, after the first mold body 1 and the second mold body 2 are closed, injection molding begins in the cavity 3, applying pressure f to the pressure block 83. The second elastic element 84 provides elastic force to cause the cutter 85 to cut off the overflow channel 23, since the cutter 85 is in contact with the first inclined surface 831 of the pressure block 83. The resultant force on the cutter 85 in the second direction is f1.

[0101] Specifically, ignoring the effects of gravity and friction, the force analysis of the pressure block 83 is as follows: Figure 13 As shown, the pressure block 83 is subjected to pressure f from the cavity 3, and is supported by the cutting blade 85 on the first inclined surface 831. The direction of the force N is perpendicular to the first inclined surface 831 and toward the pressure block 83. The force decomposition of the pressure block 83 yields: sina = N2 / N, N2 = f, f = N*sina, N = f / sina.

[0102] Ignoring the effects of gravity and friction, the force analysis of the cutter 85 is as follows: Figure 14As shown, the reaction force N' of the cutter 85 is perpendicular to the first inclined plane 831 and directed towards the cutter 85. Simultaneously, the cutter 85 also receives a support force M from the mounting cavity 21, perpendicular to the second inclined plane 211 and directed towards the cutter 85. Force analysis of the cutter 85 yields: cosa = N3 / N', sina = N4 / N'; M1 / M = cos(180°-ab), M2 / M = sina(180°-ab). In the first direction, M2 = N4 = M * sin(180°-ab) = N'sina, therefore M = N'sina / sin(180°-ab). In the second direction, the resultant force f1 = M1 + N3 = M * cos(180°-ab) + N' * cosa = N' * sina * cos(180°-ab) / sin(180°-ab) + N' * cosa = N'*cosa-N'*sina*cos(a+b) / sin(a+b)= N'* cosa - N'sina*cot(a+b)=f*cosa / sina-f*sina*cot(a+b) / sina=f*cosa / sina-f*cot(a+b)=f*cota-f*cot(a+b)=f*sinb / [sina*sin(a+b)].

[0103] It should be noted that before the cavity 3 is fully filled, f1 is always less than the elastic force applied to the pressure block 83 by the second elastic element 84. At this time, there is no need to depressurize the cavity 3. The second elastic element 84 provides elastic force to cause the cutter 85 to cut off the overflow channel 23, and the cavity 3 is disconnected from the overflow trough 22. When f1 is greater than the elastic force applied to the pressure block 83 by the second elastic element 84, in the second direction, the cutter 85 moves away from the overflow trough 22 and compresses the second elastic element 84. At this time, the overflow channel 23 connects the cavity 3 and the overflow trough 22, and the molten material in the cavity 3 can flow into the overflow trough 22 through the overflow channel 23 to depressurize the cavity 3. After the edge banding 200 in the cavity 3 has solidified, the waste material in the overflow groove 22 and the overflow channel 23 has solidified simultaneously. The first mold body 1 and the second mold body 2 are opened. At this time, the pressure applied to the pressure block 83 by the cavity 3 approaches 0. The second elastic element 84 pushes the cutter 85 to cut off the material neck connecting the overflow channel 23 and the edge banding 200, so that the edge banding 200 is separated from the solidified waste material in the overflow groove 22. Then the edge banding 200 is ejected and demolded, and the waste material in the overflow groove 22 is cleaned, which improves the demolding efficiency of the edge banding 200.

[0104] Furthermore, to accommodate different pressure relief pressures in cavity 3, in some embodiments, springs with different elastic forces can be used for adaptation. In some other embodiments, ignoring the influence of the weight of the pressure block 83, the magnitude of f can be adjusted by the force-bearing area S of cavity 3 acting on pressure block 83. The angle between the first inclined plane 831 and the first direction is α, f = PS, P < 40 bar, f1 = f*sinb / [sina*sin(a+b)] = PS f*sinb / [sina*sin(a+b)], where α ≥ 75°. In this case, when the pressure in cavity 3 is relatively low, the second elastic element 84 can be compressed to release pressure and relieve pressure, thus improving the sensitivity of the pressure relief process in cavity 3. If α is less than 75°, it can be seen from the force components that cavity 3 needs to reach a higher pressure to complete the pressure relief, thus prolonging the pressure relief response time.

[0105] Furthermore, to improve the cutting efficiency of the cutter 85 in cutting the solidified waste in the overflow channel 23, the cutting angle of the cutter 85 is b, where b ≤ 30°. By reducing the cutting angle b of the cutter 85, the frictional force of the pressure block 83 on the cutter 85 during cutting and the resistance in the first direction are reduced, making it easier for the cutter 85 to penetrate into the waste and achieve efficient shearing. At the same time, the smaller cutting angle can guide the cutting force to be more concentrated in the narrow area of ​​the cutting edge, reducing the overall compression of the solidified waste, thereby effectively suppressing the plastic deformation and fibrous "stringing" phenomenon of the waste during the cutting process and improving the flatness of the cut surface.

[0106] Furthermore, such as Figure 11 As shown, to facilitate rapid pressure relief when the overflow channel 23 connects the cavity 3 and the overflow tank 22, and to reduce the difficulty of cutting the solidified waste material in the overflow channel 23 with the cutter 85, in one embodiment, the dimension of the overflow channel 23 in the second direction is K3, where 1mm ≤ K3 ≤ 1.5mm. If K3 < 1mm, the inner diameter of the overflow channel 23 is small, and when pressure relief is needed in the cavity 3, the amount of molten material entering the overflow tank 22 through the overflow channel 23 per unit time is small, resulting in a slow pressure relief speed and affecting the injection molding quality of the edge banding 200. If K3 > 1.5mm, the size that needs to be cut after the molten material in the overflow channel 23 solidifies is large, affecting the cutting efficiency of the edge banding 200 and the solidified waste material. In addition, the cutter 85 is prone to wear, reducing its service life. The overflow channel 23 can be sized in the second direction as 1.1mm, 1.15mm, 1.2mm or 1.25mm, etc. While ensuring that the overflow channel 23 can quickly release pressure when connecting the cavity 3 and the overflow groove 22, it also improves the cutting efficiency of the cutter 85 on the solidified waste in the overflow channel 23.

[0107] Furthermore, to facilitate monitoring of the air pressure within the cavity 3, in one embodiment, the first mold body 1 and / or the second mold body 2 are provided with air pressure measuring holes for measuring the internal pressure of the cavity 3, allowing an external pressure gauge to be connected to measure the air pressure within the cavity 3. Further, to ensure pressure stability within the cavity 3, in one embodiment, the first mold body 1 and / or the second mold body 2 are provided with air blowing holes 14, which communicate with the cavity 3 and are used for connection to air-assisted equipment. Figure 18 As shown, both the air blowing hole 14 and the air pressure measuring hole are located on the circumferential outer side of the cavity 3. Specifically, an air auxiliary device is connected to the injection molding machine. The air auxiliary device is connected to the air pipe channel on the mold. Air can be blown or released into the cavity 3 through the air blowing hole 14 to maintain the air pressure in the cavity 3. The air pressure in the cavity 3 is measured by the air pressure gauge connected to the air pressure measuring hole.

[0108] Furthermore, in order to keep the air pressure of the cavity 3 stable during the blowing or deflation process, in one embodiment, the first mold body 1 and the second mold body 2 are provided with a communicating exhaust gap 15, exhaust groove 16 and buffer groove 17 on opposite sides in the first direction. The exhaust gap 15, exhaust groove 16 and buffer groove 17 are located on the circumferential outer side of the cavity 3 and are arranged away from the cavity 3 in sequence. At least a portion of the buffer groove 17 is arranged around the cavity 3 and the buffer groove 17 is in communication with the blowing hole 14.

[0109] Specifically, such as Figure 18 and Figure 19 As shown, in the first direction from the exhaust gap 15 to the buffer groove 17, the dimensions of the exhaust gap 15, the exhaust groove 16, and the buffer groove 17 decrease in the second direction. Thus, during the exhaust process in the cavity 3, the gas in the cavity 3 first overflows through the exhaust gap 15, then converges through the exhaust groove 16, and finally is buffered in the buffer groove 17 before being discharged through the air blowing hole 14. This improves the stability of the cavity 3 during the exhaust process and avoids sudden pressure changes. Similarly, during the inflation process in the cavity 3, the gas-assisted equipment introduces gas into the buffer groove 17 through the air blowing hole 14, and then sequentially enters the cavity 3 through the buffer groove 17 and the exhaust gap 15, preventing sudden pressure changes within the cavity 3 and improving the stability of pressure changes within the cavity 3. Specifically, as... Figure 19 As shown, in the second direction from the exhaust gap 15 to the buffer groove 17, the dimensions of the exhaust gap 15, the exhaust groove 16, and the buffer groove 17 decrease in the first direction. This ensures that the pressure change within the cavity 3 is more gradual during the inflation and deflation processes, thereby improving the stability of the air pressure within the cavity 3.

[0110] In some embodiments, the dimension of the venting gap 15 in the first direction is less than or equal to 0.05 mm, so that gas can enter and exit the cavity 3 through the venting gap 15, while molten material cannot pass through the venting gap 15. When the dimension of the venting gap 15 in the first direction is greater than 0.05 mm, firstly, the pressure change in the cavity 3 is too rapid, which can easily lead to pressure instability in the cavity 3. At the same time, because the venting gap 15 is too large, the molten material in the cavity 3 can easily overflow from the venting gap 15, blocking the filling / venting path formed by the venting gap 15, the venting groove 16, the buffer groove 17, and the blowing hole 14, making it impossible to regulate the pressure in the cavity 3 and reducing the quality of the finished product in the cavity 3. The dimension of the venting gap 15 in the first direction can be 0.1 mm, 0.3 mm, or 0.5 mm, which can be adaptively adjusted according to actual needs. Furthermore, in one embodiment, the dimension of the venting groove 16 in the first direction is 0.5 mm, and the dimension on the plane perpendicular to the first direction is 4 mm, such as Figure 19 As shown, the exhaust groove 16 is elongated, with a depth of 0.5 mm and a width of 4 mm, and communicates with the exhaust gap 15, facilitating the collection of gas within the exhaust gap 15 within the exhaust groove 16. The buffer groove 17 has a dimension of 4 mm in both the first direction and the plane perpendicular to the first direction. The buffer groove 17 is also elongated, with a depth and width of 4 mm. Increasing the volume of the buffer groove 17 helps improve the stability of the gas pressure in the cavity 3 during the filling and venting processes. It should be noted that the dimensions of the exhaust groove 16 and the buffer groove 17 can be adaptively adjusted according to the actual working conditions of the cavity 3.

[0111] Furthermore, such as Figure 17 As shown, to facilitate the placement and positioning of the glass 100 in the mold, in some embodiments, the injection mold further includes a suction cup assembly 9, which is used to position the glass 100 of the glass assembly between the first mold body 1 and the second mold body 2. Specifically, when the glass 100 enters between the first mold body 1 and the second mold body 2, the suction cup assembly 9 holds the glass 100 to complete the placement and positioning.

[0112] Furthermore, such as Figure 17As shown, after the first mold body 1 and the second mold body 2 are closed, in order to monitor the pressure applied to the glass 100, in one embodiment, the injection mold further includes an airbag 10. The airbag 10 is located in the sealing groove 5. One side of the airbag 10 abuts against the sealing member 4 in the first direction, and the other side of the airbag 10 abuts against the bottom wall of the sealing groove 5 in the first direction. The airbag 10 is connected to an external air supply system through a pipe. At this time, the pressure of the glass 100 acting on the sealing member 4 directly acts on the airbag 10. By monitoring the pressure of the airbag 10, the pressure change on both sides of the glass 100 during the injection molding of the edge banding 200 can be monitored. Further, in order to facilitate the sealing of the sealing member 4 with the glass 100 and the first mold body 1 and the second mold body 2, after the first mold body 1 and the second mold body 2 are closed, at this time, the sealing member 4 is not in contact with the glass 100. Subsequently, the airbag 10 is inflated and controlled at a preset pressure, and the sealing member 4 is lifted up to contact the glass 100 to form a seal. After the edge banding 200 is injection molded, the airbag 10 is depressurized, which will depressurize the cavity 3 and eject the edge banding 200 to remove the part from the mold.

[0113] Furthermore, such as Figure 20 As shown, in some other embodiments, in order to monitor the pressure applied to the glass 100 and facilitate the demolding of the glass assembly, the injection mold also includes a capsule 12. A mounting groove 13 is provided on the first mold body 1 and / or the second mold body 2. The capsule 12 is located within the mounting groove 13. After the first mold body 1 and the second mold body 2 are closed, a medium is filled into the capsule 12. At least a portion of the capsule 12 protrudes from the mounting groove 13 and abuts against the glass 100. The capsule 12 is connected to an external medium source (the medium can be gas or liquid) via a pipe. At this time, the glass 100 is in direct contact with the capsule 12. By monitoring the pressure of the capsule 12, the pressure changes on both sides of the glass 100 during the injection molding process of the edge banding 200 can be monitored. After injection molding is completed, the medium in the capsule 12 is discharged, thereby depressurizing the cavity 3, and subsequently, the glass assembly can be demolded and removed.

[0114] like Figure 20As shown, to facilitate fixing the capsule 12 within the mounting groove 13, in one embodiment, the capsule 12 includes a fixing part 121 and a deformable part 122. When the capsule 12 is not filled with a medium, both the fixing part 121 and the deformable part 122 are located within the mounting groove 13. After the first mold 1 and the second mold 2 are molded together, the capsule 12 is filled with a medium, and at least a portion of the deformable part 122 protrudes from the mounting groove 13 and abuts against the glass 100. The fixing part 121 has protruding structures on its opposite sides, and the mounting groove 13 has recessed structures that correspond to and interlock with the protruding structures. Thus, after the fixing part 121 and the mounting groove 13 are assembled, an inverted structure is formed, which can prevent the capsule 12 from coming out of the mounting groove 13. The fixing part 121 can be further strengthened with the mounting groove 13 by using glue. Furthermore, in some embodiments, the protruding structure and the recessed structure, after being fitted together, also have a deformation gap, which can be used to fill the gap when the capsule 12 deforms and overflows, thereby improving the stability of the capsule 12 during the deformation process. In some embodiments, the protruding structure and the recessed structure are fitted together without gap, which can reduce the irregular deformation of the capsule 12 and improve the stability of the capsule 12. The fit between the protruding structure and the recessed structure can be adaptively adjusted according to actual needs.

[0115] Furthermore, such as Figure 15 and Figure 16 As shown, the mold is provided with a gate 11, that is, the first mold body 1 or the second mold body 2 is provided with a gate 11 for filling the cavity 3 with molten material, in order to reduce surface air marks after the edge banding 200 is formed. In one embodiment, as Figure 16 As shown, the projection of the gate 11 onto a plane perpendicular to the first direction is located within the projection range of the glass 100 in the first direction. That is, during the process of filling the cavity 3 with material through the gate 11, since the material at the gate 11 can be blocked by the glass 100, it can avoid direct impact on the edge 200 area located outside the glass 100, thus preventing air marks and improving the yield of the edge 200.

[0116] It should be noted that the gate 11 is generally located on the non-visual surface of the edging 200, such as... Figure 16As shown, the gate 11 is located in the lower region of the glass 100, the bottom surface of the edging 200 is a non-exterior surface, and the top surface of the edging 200 is an exterior surface. If the gate 11 is located in the outer region of the glass 100, the projection of the gate 11 on the plane perpendicular to the first direction is outside the projection range of the glass 100 in the first direction. During the molding process, the area corresponding to the exterior surface of the edging 200 will be continuously fed by the gate 11, which could easily directly impact the exterior surface and cause air marks. However, if the projection of the gate 11 on the plane perpendicular to the first direction is within the projection range of the glass 100 in the first direction, the area corresponding to the exterior surface of the edging 200 will still be continuously fed by the gate 11 during the molding process, but due to the obstruction of the glass 100, it will not directly impact the exterior surface, thereby improving the molding quality of the exterior surface.

[0117] Based on the same concept, the present invention also provides an injection molding method for a glass assembly, applied to the injection mold of any of the above claims, the injection molding method comprising the following steps:

[0118] S1. The edge-sealing material is melted inside the injection molding machine;

[0119] S2. Place the glass 100 between the first mold 1 and the second mold 2, close the first mold 1 and the second mold 2, and seal the cavity 3 with the sealing member 4.

[0120] S3. Inflate cavity 3 for a preset time T1 to stabilize the pressure inside the cavity to P1, and then fill the cavity 3 with the molten material in the injection molding machine through the runner.

[0121] S4. Depressurize cavity 3 to reduce the pressure inside cavity 3 from P1 to 0;

[0122] S5. After the molten material in the cavity 3 cools and solidifies to form the edge 200, the first mold body 1 and the second mold body 2 are opened and the glass assembly is removed.

[0123] It should be noted that in step S1, the edge-sealing material specifically refers to a mixture of edge-sealing material (elastomers such as TPE / PVC) and foaming agent (foaming agent ratio 4%-10%). The edge-sealing material and foaming agent are uniformly mixed and then melted in the barrel of the injection molding machine. In step S2, the glass 100 is placed between the first mold body 1 and the second mold body 2. The first mold body 1 and the second mold body 2 are closed, and the cavity 3 is sealed by the sealing element 4 to keep the pressure inside the cavity 3 stable.

[0124] In step S3, a delayed injection molding process is adopted. The injection mold includes an air-assisted device. After the first mold body 1 and the second mold body 2 are closed, the pressure inside the cavity 3 needs to be measured and monitored. Specifically, after the first mold body 1 and the second mold body 2 are closed, the air-assisted device inflates the cavity 3 for a preset time T1, so that the pressure inside the cavity 3 reaches a stable value P1 (100Psi-500Psi). The pressure inside the cavity 3 is monitored through the air pressure measuring hole. Subsequently, the molten material in the injection molding machine is filled into the cavity 3 through the runner. When the molten material enters the cavity, the front end of the material flow is squeezed by the gas inside the cavity, preventing the gas inside the molten material from entering the cavity and accumulating on the surface to form nuclei, which would affect the appearance quality of the edge banding 200 after molding. In step S3, the injection delay time is the same as T1, that is, the inflation process of the cavity 3 is carried out simultaneously during the injection delay process. It should be noted that the gas-assisted equipment is a standard piece of equipment used in injection molds, which can be used to inflate or deflate cavity 3. Its specific structure will not be described in detail.

[0125] In step S3, as the molten material enters cavity 3, the gas inside cavity 3 gradually decreases, and the pressure inside cavity 3 rises rapidly. The maximum pressure that cavity 3 can reach is Pmax. Therefore, in step S4, cavity 3 needs to be depressurized. Specifically, in step S4, cavity 3 is depressurized by connecting a gas-assisted device to cavity 3. The gas-assisted device has multiple depressurization values ​​P2, P3, P4...Pn, arranged from high to low, such as P2 = P1 - P0 (10 bar < P0 < P1). P1 is less than Pmax. When the gas-assisted device starts depressurizing cavity 3, within the pressure gradient of P0, the time required for the gas pressure to drop from P1 to P2 is T2. The depressurization rate can be controlled by adjusting the values ​​of P0 and T2. Similarly, the time required for the air pressure to drop from P2 to P3 is T3, and so on. When the air pressure drops from Pn-1 to Pn, the time required is Tn. The injection time T = T2 + T3... + Tn. It should be noted that after the product is injected, the air pressure in cavity 3 becomes 0, completing the pressure relief. During the pressure relief process, the gas-assisted equipment can set multiple pressure relief gradients and control the time of different pressure relief gradients to achieve staged pressure relief, improve pressure relief accuracy, and enable rapid pressure relief in cavity 3.

[0126] It should be noted that in this application, the edge banding 200 uses foam injection molding. If the cavity 3 is continuously under high pressure, it will inhibit the nucleation and expansion of the foaming agent, resulting in small cells, high density, low foaming rate, or even completely inhibiting foaming. Therefore, in order to ensure that the foaming agent has a good foaming effect, there is a pressure holding process between step S5 and step S4. Specifically, after the injection molding in the cavity 3 is completed, the pressure relief component 8, the floating core 7, or the overflow groove 22 is used to relieve pressure and achieve controllable pressure reduction. After the cavity 3 is filled and before the molten material has solidified, the pressure in the cavity 3 is rapidly reduced to cause the foaming agent dissolved in the molten material to nucleate and expand instantly, thereby increasing the foaming rate.

[0127] In step S5, after the molten material in the cavity 3 cools and solidifies to form the edging 200, the first mold body 1 and the second mold body 2 are opened, and the glass assembly formed by the glass 100 and the edging 200 is taken out, thus completing the injection molding process of the glass assembly.

[0128] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An injection mold, characterized in that, include: First motif; The second mold body and the first mold body are arranged opposite to each other in a first direction. When the two mold bodies and the first mold body are closed, they form a cavity for edge forming of the glass assembly. Multiple sealing elements are provided. When the first mold body and the second mold body are closed, the multiple sealing elements are located on both sides of the cavity in a second direction. The sealing elements are used to seal the cavity. The first direction intersects the second direction.

2. The injection mold according to claim 1, characterized in that, The cavity has an annular structure, with a portion of the seal located between the glass of the glass assembly and the first mold body, and disposed around the inner circumferential side of the cavity; and / or, a portion of the seal located between the glass and the second mold body, and disposed around the inner circumferential side of the cavity; and / or, a portion of the seal located between the first mold body and the second mold body, and disposed around the outer circumferential side of the cavity.

3. The injection mold according to claim 1, characterized in that, Both the first mold body and the second mold body have sealing grooves on opposite sides in the first direction, and the sealing element is installed in the sealing groove.

4. The injection mold according to claim 3, characterized in that, The injection mold further includes a movable part, which is detachably connected to the first mold body or the second mold body; the sealing element includes a plurality of first sealing strips connected end to end, the sealing groove includes a first groove and a second groove that are interconnected, the first sealing strip is located in the first groove, the movable part is located in the second groove, the movable part and the first sealing strip are arranged opposite to each other in the second direction, and the movable part is used to press the opposite ends of two adjacent first sealing strips.

5. The injection mold according to claim 4, characterized in that, In the second direction, the opposite ends of two adjacent first sealing strips are at least partially stacked along the second direction and abut against the movable part.

6. The injection mold according to claim 4, characterized in that, The sealing element further includes a second sealing strip located in the second groove, with the opposite ends of two adjacent first sealing strips abutting against each other. The second sealing strip abuts against the sidewall of two adjacent first sealing strips on one side in the second direction, and abuts against the movable element on the other side in the second direction.

7. The injection mold according to claim 5, characterized in that, The width of the first sealing strip is K0, and the width of the first groove is K1, where 0.1mm ≤ K0 - K1 ≤ 0.3mm.

8. The injection mold according to claim 7, characterized in that, The minimum distance between the side wall of the first groove away from the movable part and the movable part is K2, where 0.2mm≤2K0-K2≤0.5mm.

9. The injection mold according to claim 7, characterized in that, The length of the overlapping portion of the opposite ends of the two adjacent first sealing strips in the second groove is L1, the length of the second groove is L2, and L2-K0≥L1.

10. The injection mold according to claim 6, characterized in that, The length of the second sealing strip is L3. The lengths of the second sealing strip that overlap with the two adjacent first sealing strips in the length direction are L4 and L5, respectively, where L3≥L4+L5, L4≥3mm, and L5≥3mm.

11. The injection mold according to claim 3, characterized in that, In the second direction, when the seal is located on the side of the cavity near the glass, the seal protrudes from the sealing groove in the first direction by 0.3mm-0.5mm; and / or, the distance between the seal and the cavity in the second direction is F1, 3mm≤F1≤8mm; and / or, the Shore hardness of the seal is A65-A85.

12. The injection mold according to claim 3, characterized in that, The distance between the seal and the cavity in the second direction is F1. When F1 < 3mm, the width of the seal is 8mm-15mm.

13. The injection mold according to claim 3, characterized in that, The sealing element comprises a multi-layer sealing base layer stacked in the first direction.

14. The injection mold according to claim 13, characterized in that, The hardness of the multilayer sealing base layer increases in the first direction along the direction away from the bottom wall of the sealing groove.

15. The injection mold according to claim 14, characterized in that, One of the sealing base layers is located on one side of the sealing groove in the first direction, and the other side of the sealing base layer protrudes out of the sealing groove in the opposite direction and is used to abut against the glass, the first mold or the second mold.

16. The injection mold according to claim 15, characterized in that, One of the sealing base layers includes a flexible body and a plurality of reinforcing structures, the reinforcing structures being distributed at least on two opposite sides of the flexible body along a second direction.

17. The injection mold according to claim 3, characterized in that, In the second direction, when the seal is located on the side of the cavity away from the glass, the seal protrudes from the sealing groove in the first direction by 0.3mm-1mm; and / or, the distance between the seal and the cavity in the second direction is F2, F2≥10mm; and / or, the Shore hardness of the seal is between A60 and A100.

18. The injection mold according to claim 3, characterized in that, It also includes an airbag located within the sealing groove. The airbag abuts against the seal on one side in the first direction and against the bottom wall of the sealing groove on the other side in the first direction. The airbag is connected to an external air supply system.

19. The injection mold according to claim 1, characterized in that, The injection mold also includes a floating core, which is movably connected to the first mold body or the second mold body. When the first mold body and the second mold body are closed, they surround the floating core to form the cavity.

20. The injection mold according to claim 1, characterized in that, The injection mold also includes a pressure relief component, and the second mold body is further provided with an installation cavity and an overflow groove. The installation cavity is used to install the pressure relief component, and the pressure relief component is used to control the connection and disconnection between the overflow groove and the cavity.

21. The injection mold according to claim 20, characterized in that, The pressure relief assembly includes a plug and a first elastic member; at least a portion of the plug is located within the mounting cavity and can slide relative to the second mold body along the first direction; the first elastic member is located within the mounting cavity, one end of the first elastic member abuts against the plug, and the other end of the first elastic member abuts against the inner wall of the mounting cavity, and the first elastic member has a tendency to push the plug in the first direction to disconnect the cavity from the overflow groove.

22. The injection mold according to claim 20, characterized in that, The pressure relief assembly includes a pressure block, a second elastic element, and a cutter. The pressure block and the cutter are spaced apart in the first direction. At least a portion of the pressure block is located in the mounting cavity and can slide relative to the second mold body in the first direction. An overflow channel is formed between the pressure block and the side wall of the mounting cavity. The overflow channel is used to connect the cavity and the overflow groove. The pressure block and the cutter have a first inclined surface on the side that abuts against each other in the first direction. In the direction along the second direction from the second elastic member to the overflow channel, the first inclined surface is inclined toward the side closer to the overflow channel. One end of the second elastic member in the second direction abuts against the side wall of the mounting cavity, and the other end of the second elastic member in the opposite direction abuts against the back of the cutter. The second elastic member in the second direction tends to push the cutter to cut off the overflow channel.

23. The injection mold according to claim 22, characterized in that, The angle between the first inclined plane and the first direction is α, where α ≥ 75°.

24. The injection mold according to claim 22, characterized in that, The cutting edge angle of the cutter is b, where b ≤ 30°.

25. The injection mold according to claim 22, characterized in that, The overflow channel has a dimension of K3 in the second direction, where 1mm ≤ K3 ≤ 1.5mm.

26. The injection mold according to claim 1, characterized in that, The first mold body and / or the second mold body are provided with an air pressure measuring hole and an air blowing hole. The air pressure measuring hole is used to measure the internal pressure of the cavity; the air blowing hole is connected to the cavity and is used to connect to the air-assisted equipment.

27. The injection mold according to claim 26, characterized in that, The first mold body and the second mold body are provided with a communicating venting gap, venting groove and buffer groove on opposite sides in the first direction. The venting gap, the venting groove and the buffer groove are located on the circumferential outer side of the cavity and are arranged away from the cavity in sequence. The venting gap is in communication with the cavity. At least a portion of the buffer groove is arranged around the cavity. The buffer groove is in communication with the air blowing hole.

28. The injection mold according to claim 27, characterized in that, In the first direction, from the exhaust gap to the buffer groove, the dimensions of the exhaust gap, the exhaust groove, and the buffer groove decrease in the second direction.

29. The injection mold according to claim 1, characterized in that, The first mold or the second mold is provided with a gate, and the projection of the gate on a plane perpendicular to the first direction is located within the projection range of the glass in the first direction.

30. The injection mold according to claim 1, characterized in that, It also includes a capsule located circumferentially inside the cavity. The first mold and / or the second mold are provided with a mounting groove. The capsule is located in the mounting groove. When the capsule is filled with a medium, at least a portion of the capsule protrudes from the mounting groove and abuts against the glass.

31. An injection molding method, applied to the injection mold according to any one of claims 1-30, characterized in that, The injection molding method includes the following steps: S1. Melt the edge-sealing material in the injection molding machine; S2. Place the glass between the first mold body and the second mold body, close the first mold body and the second mold body, and seal the cavity with a sealing member; S3. Inflate the cavity for a preset time T1 to stabilize the pressure inside the cavity to P1, and then fill the cavity with the molten material in the injection molding machine through the flow channel; S4. Depressurize the cavity to reduce the pressure inside the cavity from P1 to 0; S5. After the molten material in the cavity cools and solidifies to form an edge, the first mold and the second mold are opened to remove the glass assembly.

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