A flush door sealing system corner joint mold structure and method of use thereof

Abstract

The application discloses a flush door sealing system corner joint die structure and a using method thereof, which comprises a lower die assembly composed of a first lower die plate and a second lower die plate, and a first cavity assembly, a second cavity assembly, a plug plate assembly, a third cavity assembly and a fourth cavity assembly arranged on the second lower die plate. The first cavity block and the second cavity block are arranged on the two sides of the product corner joint and slide in opposite directions. The third cavity block and the sliding bubble tube die core can slide along the product length direction. A micro-motion bubble tube die core is arranged on the upper surface of the second lower die plate and connected with the shaft, and can be micro-motion overturned around the shaft. The plug plate assembly is driven by the push-pull rod, the linkage plate and each plug plate. Through the cooperation of the multiple cavity assemblies and the plug plate assembly, the application realizes segmented and orderly mold opening, solves the problem of difficult demolding of the hollow bubble tube corner joint product, can effectively avoid product tearing, and improves the production efficiency and the product yield.

Description

Technical Field

[0001] This invention belongs to the field of hollow bubble tube corner joints, and specifically relates to a corner joint mold structure for a flush door sealing system and its usage method. Background Technology

[0002] Traditional car door sealing strips mostly use a solid lip or hook-edge structure, relying on line contact to achieve a sealing function. These strips consist of a foamed lip and a solid portion, achieving a seal by the contact between the lip and the edge of the car body during door opening and closing. However, this structure has several inherent drawbacks: firstly, line contact sealing places extremely high demands on door manufacturing and assembly tolerances; pursuing high sealing performance necessitates increasing interference, directly resulting in heavy closing force. Secondly, the lip structure is prone to plastic deformation and wrinkling after long-term repeated compression, leading to seal failure and reduced sound insulation performance. Furthermore, friction noise can easily occur when the sealing strip lip mates with the side panel of the car body.

[0003] To overcome the aforementioned shortcomings, the industry upgraded the sealing strip structure to a hollow bubble tube structure. The bubble tube, with its hollow closed-cell structure, upgrades line contact to surface contact, significantly improving sealing and sound insulation performance while reducing compressive load and minimizing deformation after long-term use. However, the bubble tube structure also presents new challenges for the design and demolding of corner fitting molds: the hollow bubble tube lacks internal support, making it difficult to effectively extract the mold core from the sealed bubble tube area after injection molding. Furthermore, during demolding of traditional corner fitting molds, the cavity blocks often move linearly in a single direction, easily pulling on the sealing strip during molding, leading to product deformation or even breakage, resulting in a low yield.

[0004] Therefore, how to achieve efficient and non-destructive demolding of corner products while ensuring the sealing advantages of the bubble tube structure has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] Purpose of the Invention: To overcome the above shortcomings, the purpose of this invention is to provide a corner mold structure and its usage method for a flush door sealing system. Addressing the challenges of molding the corners due to the unique structure of the hollow bubble tube, this solution uses a contour-following mold core that matches the bubble tube's outline, ensuring reliable molding at the corners. Furthermore, to avoid the contour-following mold core hindering product demolding, the mold core is designed as a split structure with a step-by-step withdrawal strategy. First, a portion of the mold core is withdrawn to create demolding space, then the remaining portion is withdrawn. This ensures smooth demolding while maintaining the quality of the corner molding, balancing molding reliability and demolding convenience.

[0006] Technical Solution: To achieve the above objectives, the present invention provides a corner mold structure for a flush door sealing system, comprising: a lower mold assembly, a first cavity assembly, a second cavity assembly, an insert plate assembly, a third cavity assembly, and a fourth cavity assembly; the lower mold assembly includes a first lower template and a second lower template; the first lower template and the second lower template are stacked sequentially; the second lower template has a lower mold cavity, which is located at the corner and is L-shaped; the first cavity assembly and the second cavity assembly are both located on the second lower template; the first cavity assembly and the second cavity assembly each include a first cavity block and a second cavity block; the first cavity block and the second cavity block are both located beside the corner of the product; The insert plate assembly is disposed on the second lower template and located at the product corner; the third cavity assembly and the fourth cavity assembly are both disposed on the second lower template; the third cavity assembly and the fourth cavity assembly respectively include a third cavity block and a sliding bubble tube mold core; the first cavity block moves along the length direction of one side of the lower mold cavity, and the movement direction of the second cavity block and the sliding bubble tube mold core is opposite to that of the first cavity block; the third cavity block moves along the length direction of the other side of the lower mold cavity; the sliding bubble tube mold core is disposed at the product corner; a micro-moving bubble tube mold core is also provided on the upper surface of the second lower template at the product corner; the micro-moving bubble tube mold core is axially connected to the upper surface of the second lower template and can achieve micro-movement rotation around the axis.

[0007] Furthermore, the multi-component collaborative operation enables orderly, step-by-step mold opening. The first and second cavity blocks move in opposite directions, shifting and making way for each other in the initial demolding stage. Subsequently, the third cavity block slides further along the product direction to expand the operating area. Each component operates sequentially without interfering with the others, with ample clearance at each step. Simultaneously, the sliding bubble tube mold core and the micro-moving bubble tube mold core form a segmented demolding structure, dividing the traditional one-piece mold core into two. During demolding, the sliding bubble tube mold core actively slides out, while the micro-moving bubble tube mold core only undergoes a slight follow-up rotation, acting as a "support" at the end of demolding. This ensures smooth extraction of the mold core while preventing the product from deforming or being damaged due to loss of support at the last moment.

[0008] Furthermore, the first cavity assembly also includes a first power mechanism and a first connecting rod; the first cavity block is connected to the output end of the first power mechanism via the first connecting rod, and is driven by the first power mechanism to slide. The first cavity block is driven by the first power mechanism and the first connecting rod to achieve automated sliding. Compared with manual operation, hydraulic cylinder drive can ensure the stability and repeatability of the mold opening action, reduce the impact of human factors on product quality, and improve production efficiency.

[0009] Furthermore, the second cavity assembly also includes a second power mechanism and a second connecting rod; the second cavity block is connected to the output end of the second power mechanism via the second connecting rod, and is driven by the second power mechanism to slide. The two sets of hydraulic cylinders of the first and second power mechanisms control the two cavity blocks to move in opposite directions, which can achieve synchronous clearance on both sides and avoid deformation or tearing of the product due to uneven force during demolding.

[0010] Furthermore, the third cavity assembly also includes a rotating gripping rod and a third connecting plate; the third cavity block is connected to the rotating gripping rod via the third connecting plate and is driven by the rotating gripping rod to slide along the length of the product. The third cavity block is driven by the rotating gripping rod and the third connecting plate, and is operated manually. The addition of a manual adjustment mechanism to the hydraulic cylinder drive allows the operator to flexibly control the mold opening timing and stroke according to the actual molding situation, enhancing the mold's operational flexibility.

[0011] Furthermore, the fourth cavity assembly also includes a push-pull handle and a fourth connecting rod; the sliding bubble tube mold core is connected to the push-pull handle via the fourth connecting rod, and can be manually slid along the length of the product by the push-pull handle. The push-pull handle is intuitive to operate, allowing operators to accurately control the sliding distance of the mold core, ensuring that the force is controllable when demolding the bubble tube area, and avoiding product tearing due to the mold core being pulled out too quickly.

[0012] Furthermore, the insert assembly includes a push-pull rod, a linkage plate, a first insert plate, a second insert plate, a third insert plate, a rotating base, and a rotating wall panel; the push-pull rod is fixedly connected to the linkage plate, and the axial direction of the push-pull rod is aligned with the corner of the product; the first insert plate is located at the end of the push-pull rod away from the handle; the second and third insert plates are respectively located on both sides of the push-pull rod; the second insert plate is located on the rotating base and is assembled with the linkage plate through a guide groove, and is driven by the linkage plate to achieve translation; the third insert plate is located on the rotating base; the middle part of the third insert plate is connected to the rotating base through a rotating shaft, and one end is assembled with the linkage plate through a guide groove; the third insert plate is driven by the linkage plate to achieve a slight horizontal rotation; the rotating base is slidably connected to the push-pull rod, and the linkage plate slides within the rotating base; the rotating wall panel is located on the second lower template, and the two are fixedly connected; the rotating base and the rotating wall panel are connected through a rotating shaft, and the rotating base can rotate around the rotating shaft. The second insert plate moves horizontally along the product's length, while the third insert plate slightly rotates in the horizontal plane. These two movements are coordinated and driven by the same linkage plate. Combined with the horizontal outward movement of the first insert plate, this allows the contour mold core at the bubble tube joint to detach from the product in segments from multiple directions, preventing forced core pulling from tearing the hollow bubble tube wall. Simultaneously, after the insert plate assembly moves to make room, the rotation action further ensures that the first, second, and third insert plates are completely away from the joint product, providing ample operating space for operators to remove the product and improving the ease of retrieval.

[0013] Furthermore, the first cavity block, the second cavity block, the third cavity block, and the sliding bubble tube mold core are all connected to the second lower mold plate groove, sliding to open the lower mold. The groove guide ensures that each component slides precisely along a predetermined trajectory, ensuring the consistency of the lower mold opening position each time, which helps to improve product molding accuracy and mold life.

[0014] Furthermore, the lower mold assembly also includes a lifting cylinder; the lifting cylinder is mounted on the first lower mold plate and its output end is connected to the second lower mold plate, used to lift the second lower mold plate upwards. The lifting cylinder can lift the second lower mold plate and all its components as a whole, which facilitates the operator in removing parts and provides initial space for the sliding of each cavity block, thus serving as the starting point of the entire orderly demolding process.

[0015] This invention also provides a method for using a corner mold structure for a flush door sealing system, applicable to the aforementioned corner mold structure for a flush door sealing system, comprising the following steps: Step 1, a lifting cylinder lifts the second lower template and its components; Step 2, a first power mechanism drives a first connecting rod to slide the first cavity block on the second lower template; Step 3, a second power mechanism drives a second connecting rod to slide the second cavity block on the second lower template; Step 4, the operator pulls the push-pull rod horizontally outward, and under the action of the linkage plate, the first insert plate moves horizontally outward along the direction of the pulling force, the second insert plate moves horizontally along the product length direction, and the third insert plate slightly rotates in the horizontal plane; Step 5, the operator pushes the rotating grip downward. Step 6: The third cavity block slides on the second lower mold plate via the third connecting plate; Step 7: The operator pushes the push-pull handle inward, which drives the sliding bubble tube mold core to slide on the second lower mold plate via the fourth connecting rod. At this time, the micro-moving bubble tube mold core slightly follows the force relief; Step 8: The operator presses down the push-pull rod, which drives the push-pull rod and its components to rotate around the axis between the rotating base and the rotating wall plate, so that the first insert plate, the second insert plate, and the third insert plate are further away from the corner product, making room for operation; Step 9: The operator removes the corner product from the micro-moving bubble tube mold core, completing the demolding; Step 10: When inserting the strip, the operator first operates in the reverse order of demolding, and then inserts the semi-finished strip into the lower mold cavity 2 at the corner.

[0016] As can be seen from the above technical solution, the present invention has the following beneficial effects: This invention discloses a corner mold structure and its usage method for a flush door sealing system. Addressing the challenges of traditional corner-joining methods—such as the unique structure of hollow bubble tubes, the narrow space and complex contours at the corners, making it difficult to fully fill the adhesive and resulting in unstable molding quality—this solution uses a contour-following mold core that matches the inner contour of the bubble tube. This contour-following support ensures uniform pressure and reliable molding of the adhesive at the corner, effectively solving the technical difficulty of corner joining. Furthermore, since the contour-following mold core encloses the product after molding, it severely hinders demolding, and forced demolding can easily damage the product. Therefore, this solution designs the contour-following mold core as a split structure and adopts a step-by-step withdrawal strategy: during demolding, a portion of the mold core is withdrawn first, allowing sufficient demolding space and product movement allowance, before the remaining portion is withdrawn. This ensures smooth demolding while maintaining the molding quality of the corner.

[0017] Meanwhile, multiple sets of cavity sliders, including a first cavity block, a second cavity block, a third cavity block, and an insert plate assembly, are arranged around the corner. These sliders seal and mold the corner area from different directions, ensuring precise molding of the contours at the corner. They also exit sequentially during demolding to avoid interference between the cavities and the product. This, combined with the step-by-step exit strategy of the split contour mold core, forms a complete corner molding and demolding system. This system balances molding reliability and demolding convenience, significantly improving product yield and production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first lower template, the second lower template, and the lower mold cavity in the corner mold structure of the flush door sealing system according to the present invention; Figure 2 This is a schematic diagram showing the fully opened mold cavity in the corner mold structure of the flush door sealing system described in this invention; Figure 3 This is a schematic diagram of the first cavity component in the corner mold structure of the flush door sealing system of the present invention; Figure 4 This is a schematic diagram of the second cavity component in the corner mold structure of a flush door sealing system according to the present invention; Figure 5 This is a schematic diagram of the insert plate assembly in the corner mold structure of the flush door sealing system according to the present invention; Figure 6 This is a schematic diagram of the transmission structure of the insert plate assembly in the corner mold structure of the flush door sealing system according to the present invention; Figure 7 This is a schematic diagram of the third cavity component in the corner mold structure of the flush door sealing system of the present invention; Figure 8 This is a schematic diagram of the fourth cavity component in the corner mold structure of the flush door sealing system of the present invention; Figure 9 This is a schematic diagram of the fourth connecting rod in the corner mold structure of the flush door sealing system described in this invention; In the picture: 1-Lower mold assembly; 11-First lower mold plate; 12-Second lower mold plate; 13-Lifting cylinder; 2-Lower mold cavity; 3-First cavity assembly; 31-First cavity block; 32-First power mechanism; 33-First connecting rod; 4-Second cavity assembly; 41-Second cavity block; 42-Second power mechanism; 43-Second connecting rod; 5-Insert plate assembly; 51-Push-pull rod; 52-Linkage plate; 53-First insert plate; 54-Second insert plate; 55-Third insert plate; 56-Rotating base; 57-Rotating wall panel; 6-Third cavity assembly; 61-Third cavity block; 62-Rotating grip; 63-Third connecting plate; 7-Fourth cavity assembly; 71-Sliding bubble tube mold core; 72-Push-pull handle; 73-Fourth connecting rod; 8-Micro-movement bubble tube mold core. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Example

[0020] In this embodiment, as Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8This invention discloses a corner mold structure for a flush door sealing system, including a lower mold assembly 1, a first cavity assembly 3, a second cavity assembly 4, an insert plate assembly 5, a third cavity assembly 6, and a fourth cavity assembly 7. The lower mold assembly 1 includes a first lower template 11 and a second lower template 12; the first lower template 11 and the second lower template 12 are stacked sequentially; the second lower template 12 has a lower mold cavity 2, which is located at the corner and is L-shaped; the first cavity assembly 3 and the second cavity assembly 4 are both located on the second lower template 12; the first cavity assembly 3 and the second cavity assembly 4 each include a first cavity block 31 and a second cavity block 41; the first cavity block 31 and the second cavity block 41 are both located beside the corner of the product; the insert plate assembly 5... The first cavity 61 moves along one side of the lower mold cavity 2, and the second cavity 41 and the sliding bubble tube mold core 71 move in the opposite direction to the first cavity 31. The third cavity 61 moves along the other side of the lower mold cavity 2. The sliding bubble tube mold core 71 is located at the product corner. A micro-moving bubble tube mold core 8 is also provided on the upper surface of the second lower mold 12 at the product corner. The micro-moving bubble tube mold core 8 is axially connected to the upper surface of the second lower mold 12 and can be micro-moved around the axis.

[0021] Specifically, the number of the aforementioned cavity components can be adjusted according to the length of different products, such as 5, 6, etc.

[0022] In this embodiment, as Figure 2 and Figure 3 The first cavity assembly 3 further includes a first power mechanism 32 and a first connecting rod 33; the first cavity block 31 is connected to the output end of the first power mechanism 32 through the first connecting rod 33, and is driven by the first power mechanism 32 to slide.

[0023] Specifically, the first power mechanism 32 can be replaced by a hydraulic cylinder or a servo motor combined with a lead screw mechanism. The hydraulic cylinder is suitable for working conditions that require a large demolding force, while the servo motor can achieve more precise position control.

[0024] In this embodiment, as Figure 2 and Figure 4 The second cavity assembly 4 also includes a second power mechanism 42 and a second connecting rod 43; the second cavity block 41 is connected to the output end of the second power mechanism 42 through the second connecting rod 43 and is driven by the second power mechanism 42 to slide.

[0025] Specifically, the second power mechanism 42 can use the same control system as the first power mechanism 32 to achieve precise control of the sequence of actions. By setting delay parameters through a PLC or time relay, the sequential action of the first and second cavity blocks can be ensured to be controllable.

[0026] In this embodiment, as Figure 2 and Figure 7 The third cavity assembly 6 further includes a rotating grip 62 and a third connecting plate 63; the third cavity block 61 is connected to the rotating grip 62 through the third connecting plate 63, and is driven by the rotating grip 62 to slide along the length of the product.

[0027] Specifically, such as Figure 7 As shown in the figure, this figure shows the state of the rotating grip 62 after it has been moved into place. The rotating grip 62 has a guide groove in the middle, and the guide groove has a guide rod; the other end of the guide rod is fixedly connected to the third connecting plate 63; when the rotating grip 62 moves downward, the guide groove moves laterally, driving the third connecting plate 63 to move away from the corner, so as to realize the sliding of the third cavity block 61 along the length of the product.

[0028] In this embodiment, as Figure 2 , Figure 8 and Figure 9 The fourth cavity assembly 7 further includes a push-pull handle 72 and a fourth connecting rod 73; the sliding bubble tube mold core 71 is connected to the push-pull handle 72 through the fourth connecting rod 73, and the push-pull handle 72 slides along the length of the product.

[0029] Specifically, such as Figure 9 Therefore, this figure shows the state after the push-pull handle 72 has been moved into place. The push-pull handle 72 has a waist-shaped hole at one end near the fourth connecting rod 73, and one end of the fourth connecting rod 73 is located within this waist-shaped hole. When the push-pull handle 72 is pushed inward, the fourth connecting rod 73 is driven by this waist-shaped hole to push the sliding bubble tube mold core 71 along the product length away from the corner, thus achieving transmission.

[0030] In this embodiment, as Figure 2 , Figure 5 and Figure 6The insert assembly 5 includes a push-pull rod 51, a linkage plate 52, a first insert plate 53, a second insert plate 54, a third insert plate 55, a rotating base 56, and a rotating wall plate 57. The push-pull rod 51 is fixedly connected to the linkage plate 52, and the axial direction of the push-pull rod 51 is aligned with the corner of the product. The first insert plate 53 is located at the end of the push-pull rod 51 away from the handle. The second insert plate 54 and the third insert plate 55 are respectively located on both sides of the push-pull rod 51. The second insert plate 54 is located on the rotating base 56 and is assembled with the linkage plate 52 through a guide groove, and is driven by the linkage plate 52 to achieve translation. The third insert plate 55 is mounted on the rotating base 56; the middle part of the third insert plate 55 is connected to the rotating base 56 via a rotating shaft, and one end is assembled with the linkage plate 52 via a guide groove; the third insert plate 55 is driven by the linkage plate 52 to achieve a slight horizontal rotation; the rotating base 56 is slidably connected to the push-pull rod 51, and the linkage plate 52 slides within the rotating base 56; the rotating wall panel 57 is mounted on the second lower template 12, and the two are fixedly connected; the rotating base 56 and the rotating wall panel 57 are connected via a rotating shaft, and the rotating base 56 can rotate around the rotating shaft.

[0031] Specifically, such as Figure 5 and Figure 6 As shown in the figures, both figures represent the state when the push-pull rod 51 is pulled outward to its limit. The linkage plate 52 has guide grooves with a turning shape on both sides; the second insert plate 54 and the third insert plate 55 are each equipped with rigid guide posts; the guide posts are located within the guide grooves. When the linkage plate 52 is pulled by the push-pull rod 51, the first insert plate 53 moves away from the corner as the push-pull rod 51 pulls. The second insert plate 54 remains stationary until it reaches the turning position of its guide groove. When it reaches the turning position, it moves along the length of the product under the guidance of the guide groove. The third insert plate 55 remains stationary until it reaches the turning position of its guide groove. When it reaches the turning position, the end of the third insert plate 55 near the linkage plate 52 moves towards the push-pull rod 51 under the guidance of the guide groove. Since the middle of the third insert plate 55 is connected to the rotating base 56 via a pivot, the end of the third insert plate 55 near the corner slightly flips in the horizontal plane, achieving demolding.

[0032] In this embodiment, as Figure 1 , Figure 2 and Figure 8 The first cavity block 31, the second cavity block 41, the third cavity block 61, and the sliding bubble tube mold core 71 are all connected to the sliding groove of the second lower template 12, and slide to open the lower mold.

[0033] Specifically, a guide rail groove and a limiting block can be added to the second lower mold plate 12 to ensure that each cavity block and mold core slides along a precise trajectory, avoiding product defects caused by movement deviation. At the same time, a slider anti-backward structure can be set to lock the position of each sliding component when the lower mold closes, ensuring molding accuracy.

[0034] In this embodiment, as Figure 1 and Figure 2 The lower mold assembly 1 also includes a lifting cylinder 13; the lifting cylinder 13 is disposed on the first lower mold plate 11 and its output end is connected to the second lower mold plate 12, for realizing the upward lifting of the second lower mold plate 12.

[0035] Specifically, the lifting cylinders 13 can be set to two or more, symmetrically arranged on the first lower template 11, to ensure the stability of the second lower template 12 when it is lifted, and to avoid tilting that could cause product deformation.

[0036] In this embodiment, the present invention also discloses a method for using a corner mold structure for a flush door sealing system, applicable to the aforementioned corner mold structure for a flush door sealing system, comprising the following steps: Step 1: Lifting cylinder 13 raises the second lower template 12 and its components; Step 2: The first power mechanism 32 drives the first connecting rod 33 to move the first cavity block 31 to slide on the second lower template 12; Step 3: The second power mechanism 42 drives the second connecting rod 43 to move the second cavity block 41 to slide on the second lower template 12; Step 4: The operator pulls the push-pull rod 51 outward horizontally. Driven by the linkage plate 52, the first insert plate 53 moves outward horizontally along the direction of the pulling force, the second insert plate 54 moves horizontally along the length of the product, and the third insert plate 55 rotates slightly in the horizontal plane. Step 5: The operator pushes the rotating handle 62 downward, which drives the third cavity block 61 to slide on the second lower template 12 through the third connecting plate 63; Step 6: The operator pushes the push-pull handle 72 inward, which drives the sliding bubble tube mold core 71 to slide on the second lower template 12 through the fourth connecting rod 73. At this time, the micro-moving bubble tube mold core 8 slightly follows the force relief. Step 7: The operator presses down the push-pull rod 51. The push-pull rod 51 drives the components on it to rotate around the pivot between the rotating base 56 and the rotating wall panel 57, so that the first insert plate 53, the second insert plate 54, and the third insert plate 55 are further away from the corner product, making room for operation. Step 8: The operator removes the corner product from the micro-movement bubble tube mold core 8 to complete the demolding. Step 9: When inserting the strip, the operator should first operate in the reverse order of demolding, and then insert the semi-finished strip into the lower mold cavity 2 at the corner.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A corner mold structure for a flush door sealing system, characterized in that: include: The lower mold assembly (1) includes a first lower template (11) and a second lower template (12); the first lower template (11) and the second lower template (12) are stacked sequentially; the second lower template (12) is provided with a lower mold cavity (2), which is located at the corner and is L-shaped; The first cavity assembly (3) and the second cavity assembly (4) are both disposed on the second lower template (12); The first cavity assembly (3) and the second cavity assembly (4) respectively include a first cavity block (31) and a second cavity block (41); the first cavity block (31) and the second cavity block (41) are both located on the side of the product corner; Insert plate assembly (5), the insert plate assembly (5) is disposed on the second lower template (12) and located at the corner of the product; The third cavity assembly (6) and the fourth cavity assembly (7) are both located on the second lower template (12); the third cavity assembly (6) and the fourth cavity assembly (7) respectively include a third cavity block (61) and a sliding bubble tube mold core (71). The first cavity block (31) moves along the length direction of one side of the lower mold cavity (2), and the second cavity block (41) and the sliding bubble tube mold core (71) move in the opposite direction to the first cavity block (31); the third cavity block (61) moves along the length direction of the other side of the lower mold cavity (2); The sliding bubble tube mold core (71) is located at the corner of the product; a micro-moving bubble tube mold core (8) is also provided on the upper surface of the second lower template (12) at the corner of the product; the micro-moving bubble tube mold core (8) is axially connected to the upper surface of the second lower template (12) and can be micro-moved around the axis.

2. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The first cavity assembly (3) further includes a first power mechanism (32) and a first connecting rod (33); the first cavity block (31) is connected to the output end of the first power mechanism (32) through the first connecting rod (33) and is driven by the first power mechanism (32) to slide.

3. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The second cavity assembly (4) also includes a second power mechanism (42) and a second connecting rod (43); the second cavity block (41) is connected to the output end of the second power mechanism (42) through the second connecting rod (43) and is driven by the second power mechanism (42) to slide.

4. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The third cavity assembly (6) further includes a rotating grip (62) and a third connecting plate (63); the third cavity block (61) is connected to the rotating grip (62) through the third connecting plate (63) and is driven by the rotating grip (62) to slide.

5. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The fourth cavity assembly (7) also includes a push-pull handle (72) and a fourth link (73); the sliding bubble tube mold core (71) is connected to the push-pull handle (72) through the fourth link (73) and is driven by the push-pull handle (72) to slide.

6. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The insert assembly (5) includes a push-pull rod (51), a linkage plate (52), a first insert plate (53), a second insert plate (54), a third insert plate (55), a rotating base (56), and a rotating wall plate (57). The push-pull rod (51) is fixedly connected to the linkage plate (52), and the axial direction of the push-pull rod (51) is aligned with the corner of the product; the first insert plate (53) is located at the end of the push-pull rod (51) away from the handle; the second insert plate (54) and the third insert plate (55) are respectively located on both sides of the push-pull rod (51); the second insert plate (54) is located on the rotating base (56), and is assembled with the linkage plate (52) through the guide groove, and is driven by the linkage plate (52) to achieve translation; the third insert plate (55) is located on the rotating base (56); the middle part of the third insert plate (55) is connected to the rotating base (56) through the rotating shaft, and one end is assembled with the linkage plate (52) through the guide groove; the third insert plate (55) is driven by the linkage plate (52) to achieve micro-rotation in the horizontal direction; The rotating base (56) is slidably connected to the push-pull rod (51), and the linkage plate (52) slides inside the rotating base (56); the rotating wall plate (57) is set on the second lower template (12), and the two are fixedly connected; the rotating base (56) and the rotating wall plate (57) are connected by a rotating shaft, and the rotating base (56) can be rotated around the rotating shaft.

7. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The first cavity block (31), the second cavity block (41), the third cavity block (61), and the sliding bubble tube mold core (71) are all connected to the groove of the second lower template (12) and slide to open the lower mold.

8. The corner mold structure of the flush door sealing system according to claim 1, characterized in that: The lower mold assembly (1) also includes a lifting cylinder (13); the lifting cylinder (13) is located on the first lower mold plate (11) and its output end is connected to the second lower mold plate (12) to realize the upward lifting of the second lower mold plate (12).

9. A method of using a corner mold structure for a flush door sealing system, applicable to the corner mold structure for a flush door sealing system as described in any one of claims 1 to 8, characterized in that: include: Step 1: The lifting cylinder (13) lifts the second lower template (12) and its components; Step 2, the first power mechanism (32) drives the first connecting rod (33) to move the first cavity block (31) to slide on the second lower template (12); Step 3, the second power mechanism (42) drives the second connecting rod (43) to move the second cavity block (41) to slide on the second lower template (12); Step 4: The operator pulls the push-pull rod (51) outward horizontally. Driven by the linkage plate (52), the first insert plate (53) moves outward horizontally along the direction of the pulling force, the second insert plate (54) moves horizontally along the length of the product, and the third insert plate (55) rotates slightly in the horizontal plane. Step 5: The operator pushes the rotating handle (62) downwards, which drives the third cavity block (61) to slide on the second lower template (12) through the third connecting plate (63); Step 6: The operator pushes the push-pull handle (72) inward, and through the fourth link (73), the sliding bubble tube mold core (71) slides on the second lower template (12). At this time, the micro-movement bubble tube mold core (8) slightly follows the force relief. Step 7: The operator presses down the push-pull rod (51), which drives the components on it to rotate around the pivot between the rotating base (56) and the rotating wall panel (57), so that the first insert plate (53), the second insert plate (54), and the third insert plate (55) are further away from the corner product, making room for operation. Step 8: The operator removes the corner product from the micro-movement bubble tube mold core (8) to complete the demolding; Step 9: When inserting the strips, the operator should first follow the reverse order of demolding, and then insert the semi-finished strips into the corners.

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