Sealing strip corner connecting die with punching function

Abstract

The utility model provides a sealing strip corner connecting die with a punching function, which belongs to the technical field of corner connecting dies and comprises an upper die component, a lower die component and a corner connecting pattern die, the upper die component, the lower die component and the corner connecting pattern die are matched to define a corner connecting forming cavity, and a corner connecting die core is arranged in the corner connecting forming cavity. The lower die assembly comprises a bottom plate, a fixed lower die plate and a movable lower die plate. A cutter assembly is arranged on the movable lower mold plate, and when the upper mold assembly is downwards assembled on the movable lower mold plate, a demolding opening is formed in the joint end of the sealing strip through a cutter in a cutting mode and is inserted into a cutter groove of the corner joint mold core; an elastic limiting assembly is arranged between the movable lower die plate and the fixed lower die plate, and when the upper die assembly opens the die, the movable lower die plate resets and bounces through the elastic limiting assembly. According to the utility model, the cutter assembly for punching the demolding opening is integrated on the corner connecting mold, and one set of corner connecting mold can simultaneously realize punching and jointing, so that the production takt is improved, the production cycle is shortened, and meanwhile, the bad problems of product appearance offset, glue overflow and the like can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of corner joint molds, and particularly relates to a sealing strip corner joint mold with a punching function. Background Art

[0002] Automobile sealing strips can be divided into static sealing strips and dynamic sealing strips according to the assembly environment. Among them, the dynamic sealing strips include a bubble tube structure, which is used to eliminate and buffer the impact force when doors, engine hoods, skylights, etc. are closed, and at the same time play a sealing role.

[0003] The corner joint mold is used to join two dynamic sealing strips together. Since the corner joint position of the two sealing strips is small in volume and it is not easy to demold after being joined and formed, therefore, it is necessary to cut an opening of 20 - 30 mm at the bubble tube base position in the fine blanking process as a demolding port to ensure that the product can be demolded normally after being joined. However, this demolding structure also sacrifices the appearance quality of the product, and problems such as corner joint step difference and glue overflow are likely to occur. At the same time, the production beat of fine blanking is increased. Summary of the Utility Model

[0004] An embodiment of the utility model provides a sealing strip corner joint mold with a punching function, which can automatically cut a demolding port on the sealing strip while joining the corners, and solves the problems of multiple production beats, poor appearance quality and glue overflow during the corner joint process.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a sealing strip corner joint mold with a punching function, which includes an upper mold assembly, a lower mold assembly, and a corner joint mold disposed between the upper mold assembly and the lower mold assembly. The upper mold assembly, the lower mold assembly and the corner joint mold cooperate to enclose a corner joint forming cavity. A corner joint mold core is disposed in the corner joint forming cavity. The lower mold assembly includes: a bottom plate, a fixed lower template disposed on the bottom plate, and a movable lower template located above the fixed lower template; a cutting tool assembly is disposed on the movable lower template, and the cutting tool assembly is located below the corner joint mold core; the cutting tool assembly includes a cutting tool extending upward. When the upper mold assembly closes downward on the movable lower template, the cutting tool cuts a demolding port at the joint end of the sealing strip and inserts into a tool slot on the lower surface of the corner joint mold core; an elastic limiting component is disposed between the movable lower template and the fixed lower template. When the upper mold assembly opens, the movable lower template is reset and bounced up through the elastic limiting component.

[0006] In a realizable manner, the elastic limiting component includes a return spring disposed between the fixed lower template and the movable lower template.

[0007] In a realizable manner, a lower limiting groove for limiting the lower end of the return spring is disposed on the fixed lower template, and an upper limiting groove for limiting the upper end of the return spring is disposed on the movable lower template.

[0008] In one feasible manner, the elastic limit assembly also includes a limit bolt arranged between the fixed lower template and the movable lower template, the lower end of the limit bolt is screwed to the fixed lower template, and the movable lower template is provided with a light hole that slides with the limit bolt; the nut at the upper end of the limit bolt constitutes the extreme limit of the movable lower template to pop up upward.

[0009] In one feasible manner, the cutter assembly also includes a shell arranged on the movable lower template and a telescopic spring arranged in the shell; the lower end of the cutter extends into the shell and is connected to the shell by a pin; the telescopic spring drives the cutter to elastically reset by pushing the shell.

[0010] In one feasible manner, it also includes a mold lifting component, which includes a linear drive, a slide rail connected to the linear drive, and a lifting slider slidably matched with the slide rail; inclined slides are symmetrically arranged on the left and right sides of the slide rail, the lifting slider has rollers matched with the inclined slide rail, the lower mold of the corner mold is arranged on the lifting slider, the linear drive drives the slide rail to move back and forth, so as to drive the lifting slider to move forward and backward while rising and falling along the inclined slide rail; the fixed lower template is symmetrically arranged on the left and right sides of the slide rail; and the movable lower template is provided with an avoidance space for avoiding the forward and backward movement of the lifting slider.

[0011] In one achievable manner, the bottom plate is provided with limiting guide blocks, and the slide rail is limited between the limiting guide blocks.

[0012] In one achievable manner, it further comprises a sealing strip bracket, one end of which is fixed to the movable lower template; and a conformal block for supporting the sealing strip is arranged on the sealing strip bracket.

[0013] In one feasible manner, the lower mold of the corner mold has two lower corner forming grooves, so that the corner mold and the corner mold core cooperate to form two corner forming cavities; wherein, two sealing strip support blocks are arranged on the movable lower mold plate, and the sealing strip support blocks are provided with a conformal groove for limiting the sealing strip, and the conformal groove is connected with the lower corner forming groove to form a part of the corner forming cavity.

[0014] In one achievable manner, the movable lower mold plate is provided with a guide column for guiding the upper mold assembly; and the upper mold assembly is provided with a guide hole for slidingly fitting with the guide column.

[0015] The sealing strip corner joint mold with a punching function provided by the present utility model has the following beneficial effects compared with the prior art: the cutter assembly for punching and demolding openings is integrated on the corner joint mold, and a set of corner joint molds can simultaneously achieve punching and jointing, which can improve the production rhythm, shorten the production cycle, and at the same time can solve the problems of poor appearance such as product appearance step difference and glue overflow. Description of the Drawings

[0016] Figure 1 Schematic perspective structure of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model Figure 1 ;

[0017] Figure 2 Schematic perspective structure of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model Figure 2 ;

[0018] Figure 3 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing part of the upper die assembly);

[0019] Figure 4 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing the upper die assembly to show the top view state of the upper die assembly);

[0020] Figure 5 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing the upper die assembly to show the lower part of the corner joint forming cavity);

[0021] Figure 6 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing the upper die assembly to show a set of cutter assemblies);

[0022] Figure 7 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing the upper die assembly to show two sets of cutter assemblies);

[0023] Figure 8 Schematic perspective structure diagram of the sealing strip corner joint mold with a punching function provided by an embodiment of the present utility model (removing the upper die assembly to show the telescopic spring in the cutter assembly);

[0024] Figure 9 Schematic perspective structure diagram of the mold lifting assembly provided by an embodiment of the present utility model;

[0025] Description of the Reference Numerals

[0026] 1. Upper die assembly; 2. Movable lower template; 3. Fixed lower template; 4. Bottom plate; 5. Slide rail; 51. Oblique slideway; 6. Linear drive; 7. Support column; 8. Sealing strip bracket; 9. Sealing strip; 10. Guide post; 11. Sealing strip support block; 12. Lower die; 13. Cutting knife; 14. Housing; 15. Corner joint die core; 16. Return spring; 17. Limit bolt; 18. Telescopic spring; 19. Lifting slider; 20. Limit guide block. Detailed implementation

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] Please refer to Figures 1 to 9 For the seal corner joint die with punching function provided by the present utility model. The seal corner joint die with punching function includes an upper die assembly 1, a lower die assembly and a corner joint die disposed between the upper die assembly 1 and the lower die assembly. The upper die assembly 1, the lower die assembly and the corner joint die cooperate to enclose a corner joint forming cavity. A corner joint die core 15 is disposed in the corner joint forming cavity. The lower die assembly includes: a bottom plate 4, a fixed lower template 3 disposed on the bottom plate 4 and a movable lower template 2 located above the fixed lower template 3; a cutting knife assembly is disposed on the movable lower template 2, and the cutting knife assembly is located below the corner joint die core 15; the cutting knife assembly includes a cutting knife 13 extending upward. When the upper die assembly 1 closes downward on the movable lower template 2, the cutting knife 13 cuts out a demolding port at the joint end of the sealing strip 9 and inserts it into the knife groove on the lower surface of the corner joint die core 15; an elastic limit assembly is disposed between the movable lower template 2 and the fixed lower template 3. When the upper die assembly 1 opens the mold, the movable lower template 2 is reset and bounced up by the elastic limit assembly.

[0029] For the seal corner joint die with punching function provided by the present utility model, a cutting knife 13 is disposed below the die core, and the cutting knife assembly for punching the demolding port is integrated on the corner joint die. One set of corner joint die can simultaneously achieve punching and jointing, improve the production rhythm, and at the same time can solve the problems of poor appearance such as product appearance step difference and glue overflow.

[0030] The corner cutting operation process of the sealing strip corner joint mold with punching function provided by the present utility model is as follows: Before joining, the movable lower template 2 bounces up under the elastic reset of the reset spring 16, so as to also maintain a certain gap between the cutting knife 13 and the upper die core; Place the corner joint die core 15 on the lower die 12, place the sealing strip 9 on the sealing strip bracket 8, and insert one end of it into the connecting end of the corner joint die core 15; Close the mold, the upper die assembly 1 moves downward and gradually presses on the movable lower template 2, compressing the reset spring 16 until the movable lower template 2 moves downward and fits with the fixed lower template 3. At this time, the cutting knife 13 also penetrates the sealing strip 9 and inserts into the knife groove of the upper corner joint die core 15, and the upper die of the upper die assembly 1 is combined with the lower die 12.

[0031] In some embodiments, referring to Figure 7 and Figure 8 the elastic limit assembly includes a reset spring 16 arranged between the fixed lower template 3 and the movable lower template 2. Among them, there are four reset springs 16, which are respectively arranged at the four corners of the fixed lower template 3. When the movable lower template 2 is not subjected to the mold closing pressure of the upper die assembly 1, the reset spring 16 bounces freely, raising the movable lower template 2, so that the movable lower template 2 and the sealing strip support block 11 thereon bounce upward, so that the upper edge part of the cutting knife 13 is immersed in the sealing strip support block 11 and does not expose on the profile groove surface of the sealing strip support block 11, thus facilitating the insertion of the sealing strip 9 onto the corner joint die core 15. Among them, a narrow slit through which the cutting knife 13 extends is provided on the sealing strip support block 11. When the upper die assembly 1 closes the mold, it presses down the movable lower template 2 and the sealing strip support block 11, so that the cutting knife 13 exposes outside the sealing strip support block 11, penetrates the sealing strip 9 to punch out a demolding port and inserts into the knife groove of the corner joint die core 15.

[0032] In some embodiments, a lower limit groove for limiting the lower end of the reset spring 16 is provided on the fixed lower template 3, and an upper limit groove for limiting the upper end of the reset spring 16 is provided on the movable lower template 2, which has a limiting effect on the reset spring 16, can prevent the reset spring 16 from tilting when being compressed and bouncing, ensure the displacement of the reset spring 16 along the vertical direction, and thus ensure the overall balanced up and down movement of the movable lower template 2 and the corner joint die, without the problem of uneven forming surfaces.

[0033] In some embodiments, referring to Figure 7 and Figure 8, the elastic limit component further includes a limit bolt 17 disposed between the fixed lower template 3 and the movable lower template 2. The lower end of the limit bolt 17 is screwed onto the fixed lower template 3, and a smooth hole that slidably cooperates with the limit bolt 17 is provided on the movable lower template 2; the nut at the upper end of the limit bolt 17 constitutes the ultimate limit for the upward springing of the movable lower template 2. The limit bolts 17 are respectively arranged at the four corners of the fixed lower template 3, which can limit the maximum displacement of the upward springing of the movable lower template 2, and through the connection of the limit bolts 17, the return spring 16 has a certain amount of compression, ensuring the effectiveness of the return spring 16.

[0034] In some embodiments, referring to Figure 7 and Figure 8 , the cutter assembly further includes a housing 14 disposed on the movable lower template 2 and a telescopic spring 18 disposed inside the housing 14; the lower end of the cutter 13 extends into the housing 14 and is connected to the housing 14 through a pin. The telescopic spring 18 drives the cutter 13 to elastically reset by pushing the housing 14. Among them, a guiding cavity that slidably cooperates with the housing 14 is provided in the sealing strip support block 11 and the movable lower template 2. A narrow slit through which the cutter 13 passes is provided on the sealing strip support block 11. The housing 14 and the telescopic spring 18 are limited between the fixed lower template 3 and the sealing strip support block 11. Before mold closing, the movable lower template 2 springs upward under the elastic force of the return spring 16, and the telescopic spring 18 is also in an extended state. However, there is still a compression distance between the housing 14 supported by the telescopic spring 18 and the top surface of the guiding cavity in the sealing strip support block 11, so that when mold closing, the movable lower template 2 and the sealing strip support block 11 move downward, so that the upper end of the cutter 13 is exposed on the sealing strip support block 11, punching out a demolding port on the sealing strip 9. As the upper mold assembly 1 presses down, until the top of the guiding cavity of the sealing strip support block 11 abuts against the top of the housing 14, at this time, a compression trend will be formed on the telescopic spring 18, thereby buffering the punching force of the cutter 13, and at the same time, the elastic force stored in the telescopic spring 18 still has a tendency to spring the cutter 13 upward. Therefore, through the setting of the telescopic spring 18, both the cutter 13 is protected and assistance is provided for the punching of the cutter 13.

[0035] Optionally, the cutter assembly may also only include the housing 14 that fixes the cutter 13 and the cutter 13. The cutter 13 and the housing 14 are limited in the movable lower template 2 and the sealing strip support block 11 by the return spring 16.

[0036] In some embodiments, referring to Figures 7 to 9The corner mold also includes a mold lifting assembly, which includes a linear driver 6, a slide rail 5 connected to the linear driver 6, and a lifting slider 19 that slides with the slide rail 5; the left and right sides of the slide rail 5 are symmetrically provided with oblique slideways 51, and the lifting slider 19 has rollers that match the oblique slideway 51. The lower mold 12 of the corner mold is arranged on the lifting slider 19. The linear driver 6 drives the slide rail 5 to move forward and backward, so that the lifting slider 19 has a displacement of moving forward and backward while moving up and down along the oblique slideway 51; the fixed lower mold plate 3 is symmetrically arranged on the left and right sides of the slide rail 5; and the movable lower mold plate 2 is provided with an avoidance space for avoiding the lifting slider 19 to move forward and backward. The linear driver 6 can drive the lower mold 12 to move up and down along the oblique slideway 51 through the slide rail 5 and the lifting slider 19, and can also move along the front and back direction of the bottom plate 4, so as to adjust the position of the lower mold 12, realize the docking with the sealing strip support block 11 on the movable lower mold plate 2, and demold the product after mold opening.

[0037] The linear drive 6 in the present application can be a cylinder, an electric push rod, a hydraulic cylinder, a screw lift, etc., to provide linear motion power.

[0038] In the present application, the front-to-back direction is perpendicular to the left-to-right direction and constitutes a horizontal plane, and the up-down direction is perpendicular to the horizontal plane. The definition of the orientation is only for the convenience of description and understanding, and is not a limitation of the structure.

[0039] In some embodiments, see Figure 9 , the bottom plate 4 is provided with a limiting guide block 20, and the slide rail 5 is limited between the limiting guide blocks 20. The limiting guide blocks 20 arranged on the left and right form a channel for the slide rail 5 to move, ensuring the linear displacement of the slide rail 5.

[0040] The corner joint mold of the present application also includes a sealing strip bracket 8, one end of which is fixed on the movable lower mold plate 2; a follower block for supporting the sealing strip 9 is arranged on the sealing strip bracket 8. The present application is provided with four sealing strip brackets 8, and two sealing strip brackets 8 are joined together at the corner joint mold core 15 by injection molding.

[0041] In some embodiments, see Figure 6 As shown, the lower mold 12 of the corner mold has two lower corner forming grooves, so that the upper mold assembly 1, the lower mold assembly and the corner mold cooperate to form two corner forming cavities; wherein, two sealing strip support blocks 11 are provided on the movable lower mold plate 2, and the sealing strip support blocks 11 are provided with a conformal groove of the limited sealing strip 9, and the conformal groove and the lower corner forming groove are connected to form a part of the corner forming cavity. The sealing strip support block 11 can also be an integral structure with the movable lower mold plate 2, that is, the sealing strip support block 11 integrally formed on the movable lower mold plate 2 and protruding upward, and the sealing strip support block 11 and the lower mold 12 together form the lower half of the corner forming cavity.

[0042] Among them, the corner-joining mold further includes an upper mold fixed to the upper template of the upper mold assembly 1. After the upper mold and the lower mold 12 are closed, a corner-joining forming cavity is formed.

[0043] In some embodiments, referring to Figure 3 and Figure 4 , guide posts 10 for guiding the upper mold assembly 1 are provided on the movable lower template 2; guide holes that are slidably fitted with the guide posts 10 are provided on the upper mold assembly 1. Among them, support columns 7 are further provided at the four corners of the upper template of the upper mold assembly 1 (refer to Figure 1 and Figure 2 ). After the upper mold assembly 1 is closed in place, the support columns 7 can support on the bottom plate 4 of the lower mold assembly.

[0044] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sealing strip corner joint mold with a punching function, comprising an upper die assembly (1), a lower die assembly, and a corner joint mold disposed between the upper die assembly (1) and the lower die assembly. The upper die assembly (1), the lower die assembly, and the corner joint mold cooperate to enclose a corner joint forming cavity. A corner joint mold core (15) is disposed in the corner joint forming cavity, characterized in that, The lower die assembly includes: a bottom plate (4), a fixed lower die plate (3) disposed on the bottom plate (4), and a movable lower die plate (2) located above the fixed lower die plate (3); a cutting tool assembly is disposed on the movable lower die plate (2), and the cutting tool assembly is located below the corner joint die core (15); the cutting tool assembly includes a cutting tool (13) extending upward, and when the upper die assembly (1) closes downward on the movable lower die plate (2), the cutting tool (13) cuts out a demolding opening at the joint end of the sealing strip (9) and inserts into a tool groove on the lower surface of the corner joint die core (15); an elastic limiting assembly is disposed between the movable lower die plate (2) and the fixed lower die plate (3), and when the upper die assembly (1) opens the mold, the movable lower die plate (2) rebounds and resets through the elastic limiting assembly.

2. The sealing strip corner joint die with a punching function as described in claim 1, wherein The elastic limiting assembly includes a return spring (16) disposed between the fixed lower die plate (3) and the movable lower die plate (2).

3. The sealing strip corner joint die with a punching function as described in claim 2, characterized in that, A lower limiting groove for limiting the lower end of the return spring (16) is disposed on the fixed lower die plate (3), and an upper limiting groove for limiting the upper end of the return spring (16) is disposed on the movable lower die plate (2).

4. The sealing strip corner joint mold with a punching function according to claim 2, characterized in that, The elastic limiting assembly further includes a limiting bolt (17) disposed between the fixed lower die plate (3) and the movable lower die plate (2), the lower end of the limiting bolt (17) is screwed on the fixed lower die plate (3), and a light hole slidably matched with the limiting bolt (17) is disposed on the movable lower die plate (2); the nut at the upper end of the limiting bolt (17) constitutes the ultimate limit for the upward rebound of the movable lower die plate (2).

5. The sealing strip corner joint die with a punching function according to claim 1, characterized in that, The cutting tool assembly further includes a housing (14) disposed on the movable lower die plate (2) and a telescopic spring (18) disposed in the housing (14); the lower end of the cutting tool (13) extends into the housing (14) and is connected to the housing (14) through a pin; the telescopic spring (18) drives the cutting tool (13) to elastically reset by pushing the housing (14).

6. The sealing strip corner joint die with a punching function according to claim 1, wherein It further includes a die mold lifting assembly, the die mold lifting assembly includes a linear actuator (6), a slide rail (5) connected to the linear actuator (6), and a lifting slider (19) slidably matched with the slide rail (5); inclined slideways (51) are symmetrically disposed on the left and right sides of the slide rail (5), the lifting slider (19) has rollers fitted to the inclined slideways (51), the lower die mold (12) in the corner joint die mold is disposed on the lifting slider (19), the linear actuator (6) drives the slide rail (5) to move back and forth, so as to drive the lifting slider (19) to lift along the inclined slideways (51) while having a displacement of moving back and forth; the fixed lower die plate (3) is symmetrically disposed on the left and right sides of the slide rail (5); a relief space for avoiding the back-and-forth movement of the lifting slider (19) is disposed on the movable lower die plate (2).

7. The sealing strip corner joint die with a punching function according to claim 6, characterized in that, A limiting guide block (20) is disposed on the bottom plate (4), and the slide rail (5) is limited between the limiting guide blocks (20).

8. The corner joint die for sealing strips with a punching function according to claim 1, characterized in that, It further includes a sealing strip bracket (8), one end of the sealing strip bracket (8) is fixed on the movable lower template (2); a conforming block for supporting the sealing strip (9) is arranged on the sealing strip bracket (8).

9. The sealing strip corner joint die with a punching function according to claim 1, characterized in that, The lower die (12) of the corner joint die has two lower corner joint forming grooves, so that the corner joint die and the corner joint die core (15) cooperate to enclose the two corner joint forming cavities; wherein, two sealing strip support blocks (11) are arranged on the movable lower template (2), and a conforming groove for limiting the sealing strip (9) is arranged on the sealing strip support block (11), and the conforming groove is butted with the lower corner joint forming groove to form a part of the corner joint forming cavity.

10. The sealing strip corner joint mold with a punching function according to claim 1, characterized in that, Guide posts (10) for guiding the upper die assembly (1) are arranged on the movable lower template (2); guide holes slidably matched with the guide posts (10) are arranged on the upper die assembly (1).

Images