A hot riveting and pressing device for processing blister isolation plates

Abstract

This utility model relates to the field of thermoforming partition technology and discloses a hot riveting device for processing thermoforming partitions. It includes a processing base and a fixed template. A processing support plate is provided at the top of the processing base, and a support column is fixed to the back of the top with bolts. A support arm is rotatably fitted at the top of the support column. Fixed guide plates are provided on both sides of the bottom front of the support arm, and an electric push rod is provided at the top. The fixed template is located above the processing support plate and is connected to the fixed guide plate through a fixing component and a buffer component. Multiple heating plates and a hot riveting head are provided at its bottom. The fixing component consists of a fixing element and a fixing screw, which can stably install the fixed template. The buffer component includes a guide column and a buffer spring to ensure stable downward pressure and buffering. During operation, the thermoforming partition is placed on the processing support plate, the position of the support arm is adjusted, the template is fixed, the electric push rod is activated, the hot riveting head presses down, the heating plates heat and complete the riveting, and the process is completed after resetting. The template can be replaced to adapt to different specifications.

Description

Technical Field

[0001] This utility model relates to the field of thermoforming partition technology, specifically a hot riveting device for processing thermoforming partitions. Background Technology

[0002] Vacuum-formed partitions are plastic products made using vacuum forming technology. Due to their good toughness, insulation, and impact resistance, they are widely used in many fields such as electronics, medical, and packaging. In practical applications, vacuum-formed partitions often need to be connected and fixed by a hot riveting process to meet the structural strength and functional requirements of the product. Hot riveting can achieve a firm connection between components, ensuring the stability and reliability of the product, which is crucial for improving product quality and production efficiency. However, traditional thermoforming partition plate hot riveting devices have shortcomings. On the one hand, traditional devices mostly adopt fixed structures, making it difficult to flexibly adjust the riveting position according to the processing requirements of different workpieces. When facing multi-point riveting or workpieces of different specifications, it is often necessary to frequently change tooling or even equipment, resulting in low production efficiency and cumbersome operation. On the other hand, traditional devices lack effective buffer and guiding design, which can easily cause workpiece deformation or equipment damage due to excessive impact force during the riveting process. At the same time, it is also difficult to guarantee the accuracy and quality of the riveting points. Therefore, we propose a thermoforming partition plate processing hot riveting device. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a hot riveting device for processing thermoformed partition panels, which solves the aforementioned problems.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a hot riveting device for processing vacuum forming partition panels, comprising: The processing base and the fixed template are provided. The processing base is provided with a processing support plate at its top. A support column is fixedly installed on the back of the top of the processing base. A support arm is rotatably fitted at the top of the support column. Fixed guide plates are provided on both sides of the bottom front end of the support arm. An electric push rod is provided at the top front end of the support arm. The piston shaft of the electric push rod passes through the bottom end of the support arm. The fixed template is located at the bottom of the fixed guide plate. Multiple sets of heating plates are provided at the bottom end of the fixed template. A hot riveting head is provided at the bottom end of the heating plate. The fixed template is located above the processing support plate. A fixing assembly is provided between a fixed guide plate and a fixed template. The fixing includes fixing parts and fixing screws. The fixing parts are symmetrically distributed at the top center of the fixed template, and the fixing parts are threaded together with fixing screws. A buffer assembly is provided on the top of the fixed template. The buffer assembly includes guide posts and buffer springs. The guide posts are provided on both sides of the top of the fixed template and are symmetrically distributed. The buffer springs are sleeved on the guide posts, wherein the guide posts pass through the fixed guide plate for guidance and engagement.

[0005] Preferably, a support column is fixedly installed on the top back of the processing base by bolts, a rotating shaft is fixed at the top of the support column, and symmetrically distributed semi-circular slide rail grooves are opened on the top surface of the support column. The slide rail grooves are located on both sides of the rotating shaft, and bearings are sleeved on the rotating shaft.

[0006] Preferably, the end of the support arm is provided with a ring-shaped collar, and slide rail posts are fixed on both sides of the bottom end of the collar. The bearing is engaged inside the collar, and the slide rail posts are disposed inside the slide rail groove and slide in fit.

[0007] Preferably, rectangular guide plates are fixed on both sides of the bottom front end of the support arm, and symmetrically distributed guide holes are provided on both sides of the guide plates. A placement groove is provided on the top front end of the support arm, and an electric push rod is installed inside the placement groove. The piston shaft of the electric push rod passes through the bottom end of the placement groove.

[0008] Preferably, the fixed template has a ring-shaped positioning cylinder at the top center, auxiliary blocks are fixed on both sides of the positioning cylinder, the auxiliary blocks have T-shaped grooves inside, and symmetrical guide connecting rings are fixed on the outer side of the auxiliary blocks.

[0009] Preferably, the fixing component consists of a fixing member and a fixing screw. A semi-circular fixing end is fixed at the center of the bottom end of the fixing member, and T-shaped movable ends are fixed on both sides of the bottom end of the fixing member. The movable ends are located on both sides of the fixing end. Internal threaded holes are provided on both sides of the front end of the fixing member.

[0010] Preferably, the fixing members are set on the top of the fixing template, and the movable ends on both sides of the bottom of the two fixing members are set in the sliding groove inside the auxiliary block. The two fixing members are symmetrically distributed on the top of the fixing template. The fixing screw passes through the two fixing members and is threadedly engaged, wherein the fixing screw and the internal threads of the two fixing members are engaged in opposite directions.

[0011] Preferably, the piston shaft of the electric push rod is located inside the positioning cylinder, and the piston shaft of the electric push rod is sleeved by the bottom fixing end of the mutually symmetrical fixing parts, and the bottom end of the fixing end is in contact with the piston shaft of the electric push rod for fixation.

[0012] Preferably, the end of the guide post is located inside the guide connecting ring, the top of the guide post is fixed with a gasket, and the top of the guide post passes through the fixed guide plate and slides with a movable end. The buffer spring is sleeved on the cylindrical surface of the guide post, and the buffer spring is located at the bottom end of the gasket and the top end of the fixed guide plate.

[0013] Compared with the prior art, this utility model provides a hot riveting device for processing vacuum forming partition panels, which has the following beneficial effects: This thermoforming partition panel processing hot riveting device allows for flexible positioning adjustment. The support arm rotates with the support column via bearings, and the slide rail column slides within the slide rail groove, allowing for multi-angle adjustment of the fixed template position for precise alignment with the processing point. It adapts to different workstation requirements and provides stable installation. The fixing screw and the fixing component have a reverse thread engagement, ensuring the fixed template is quickly and securely installed on the electric push rod piston shaft, guaranteeing structural stability during processing. Precise buffering and guidance are provided by the guide column engaging with the guide hole of the fixed guide plate, and the buffer spring provides cushioning during the pressing process, avoiding excessive impact force, ensuring equipment safety while improving processing accuracy. It also allows for convenient specification switching; the fixed template can be replaced by disassembling the fixing screw, meeting the processing needs of different specifications of thermoforming partition panels, improving production flexibility and equipment versatility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the structural breakdown of this utility model; Figure 3 This is a schematic diagram of the fixing component structure of this utility model; Figure 4 This is a schematic diagram of the support arm structure of this utility model; Figure 5 This is a cross-sectional view of the fixed template structure of this utility model.

[0015] In the diagram: 1. Machining base; 2. Machining bearing plate; 3. Support column; 4. Bearing; 5. Support arm; 6. Fixed guide plate; 7. Electric push rod; 8. Fixed template; 9. Fixing component; 10. Fixed lead screw; 11. Guide column; 12. Buffer spring; 13. Rotating shaft; 14. Slide rail groove; 15. Moving end; 16. Fixed end; 17. Slide rail column; 18. Guide hole; 19. Guide connecting ring; 20. Positioning cylinder; 21. Auxiliary block; 22. Heating plate; 23. Hot riveting head. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 A hot riveting device for processing thermoformed partition panels, comprising: The processing base 1 and the fixed template 8 are provided. The top of the processing base 1 is provided with a processing bearing plate 2. The top back of the processing base 1 is fixedly installed with a support column 3. The top of the support column 3 is rotatably fitted with a support arm 5. The bottom sides of the front end of the support arm 5 are provided with fixed guide plates 6. The top of the front end of the support arm 5 is provided with an electric push rod 7. The piston shaft of the electric push rod 7 passes through the bottom end of the support arm 5. The fixed template 8 is set at the bottom of the fixed guide plate 6. The bottom end of the fixed template 8 is provided with multiple sets of heating plates 22. The bottom end of the heating plate 22 is provided with a hot riveting head 23. The fixed template 8 is located above the processing bearing plate 2. The fixing assembly is set between the fixed guide plate 6 and the fixed template 8. The fixing includes a fixing member 9 and a fixing screw 10. The fixing members 9 are symmetrically distributed at the top center of the fixed template 8. The fixing screw 10 is threaded between the two fixing members 9. A buffer assembly is provided on the top of the fixed template 8. The buffer assembly includes guide posts 11 and buffer springs 12. The guide posts 11 are provided on both sides of the top of the fixed template 8 and are symmetrically distributed. The buffer springs 12 are sleeved on the guide posts 11. The guide posts 11 pass through the fixed guide plate 6 for guidance and engagement.

[0018] Furthermore, a support column 3 is fixedly installed on the top back of the processing base 1 by bolts. A rotating shaft 13 is fixed at the top of the support column 3. Symmetrically distributed and semi-circular slide rail grooves 14 are opened on the top surface of the support column 3. The slide rail grooves 14 are located on both sides of the rotating shaft 13. A bearing 4 is sleeved on the rotating shaft 13, which provides a basic structure for the rotation and sliding of the support arm 5, so that the position of the support arm 5 can be adjusted.

[0019] Furthermore, the end of the support arm 5 is provided with a ring-shaped collar, and slide rail posts 17 are fixed on both sides of the bottom end of the collar. The bearing 4 is engaged inside the collar, and the slide rail posts 17 are set inside the slide rail groove 14 and slide to achieve a 90-degree rotation of the support arm 5 and then slide to fix it, so as to adjust the fixed template 8 to the processing position.

[0020] Furthermore, rectangular guide plates 6 are fixed on both sides of the bottom front end of the support arm 5. The guide plates 6 have symmetrically distributed guide holes 18 on both sides. A placement groove is provided on the top front end of the support arm 5. An electric push rod 7 is installed inside the placement groove. The piston shaft of the electric push rod 7 passes through the bottom end of the placement groove. The guide plates 6 are used to install the fixed template 8. The guide holes 18 assist in guidance. The electric push rod 7 provides downward pressure.

[0021] Furthermore, a circular positioning cylinder 20 is provided at the top center of the fixed template 8. Auxiliary blocks 21 are fixed on both sides of the positioning cylinder 20. A T-shaped groove is opened inside the auxiliary block 21. Symmetrical guide connecting rings 19 are fixed on the outside of the auxiliary block 21 to provide positioning for the installation of the fixed component and to provide a connection structure for the guide column 11.

[0022] Furthermore, the fixing assembly consists of a fixing member 9 and a fixing screw 10. A semi-circular fixing end 16 is fixed at the center of the bottom end of the fixing member 9, and T-shaped movable ends 15 are fixed on both sides of the bottom end of the fixing member 9. The movable ends 15 are located on both sides of the fixing end 16. Internal threaded holes are provided on both sides of the front end of the fixing member 9 to realize the stable connection and quick assembly / disassembly of the fixing template 8 and the piston shaft of the electric push rod 7.

[0023] Furthermore, the fixing member 9 is set on the top of the fixing template 8, and the movable end head 15 on both sides of the bottom end of the two fixing members 9 is set in the sliding groove inside the auxiliary block 21. The two fixing members 9 are symmetrically distributed on the top of the fixing template 8. The fixing screw 10 passes through the two fixing members 9 respectively and is threaded. The fixing screw 10 is threaded in the opposite direction to the internal threads of the two fixing members 9. Through the reverse thread engagement of the fixing screw 10, the fixing template 8 is ensured to be firmly installed and adjustable.

[0024] Furthermore, the piston shaft of the electric push rod 7 is located inside the positioning cylinder 20. The piston shaft of the electric push rod 7 is sleeved by the bottom fixing end 16 of the mutually symmetrical fixing parts 9, and the bottom end of the fixing end 16 is in contact with the piston shaft of the electric push rod 7 for fixation, ensuring the precise connection between the fixing template 8 and the electric push rod 7, so as to effectively transmit power.

[0025] Furthermore, the end of the guide post 11 is located inside the guide connecting ring 19, the top of the guide post 11 is fixed with a gasket, and the top of the guide post 11 passes through the fixed guide plate 6 and slides with the movable end 15. The buffer spring 12 is sleeved on the cylindrical surface of the guide post 11. The buffer spring 12 is located at the bottom end of the gasket and the top end of the fixed guide plate 6, and plays a guiding and buffering role during the hot riveting process to ensure stable operation of the equipment and processing accuracy.

[0026] Structural Description: Processing base 1: The basic support structure of the device, with a processing bearing plate 2 at the top and a fixed support column 3 on the back of the top, providing stable support for the whole; Processing support plate 2: Located at the top of processing base 1, it is used to place the vacuum-formed isolation plate to be processed and to provide a support surface for processing operations; Support column 3: Fixed on the back of the processing base 1, with a rotating shaft 13 and a slide rail groove 14 at the top, which rotates and cooperates with the support arm 5 to support and adjust the position of the support arm 5; Bearing 4: It is sleeved on the rotating shaft 13 and engaged with the end collar of the support arm 5 to reduce rotational friction and allow the support arm 5 to rotate flexibly to adjust the angle. Support arm 5: It is connected to support column 3 through bearing 4, and has a fixed guide plate 6 and electric push rod 7 at the front end, which can drive the fixed template 8 to move to a suitable processing position; Fixed guide plate 6: Fixed to the bottom of the front end of the support arm 5, with guide holes 18 on both sides for installing the fixed template 8 and assisting in guiding the fixed template 8 to move up and down; Electric push rod 7: Installed at the top front end of support arm 5, with piston shaft passing through support arm 5, providing power for the lifting and lowering of fixed template 8, and realizing downward riveting; Fixed template 8: Located above the processing support plate 2, with a heating plate 22 and a hot riveting head 23 at the bottom, and connected to the fixed guide plate 6 through a fixed assembly; Fixing component 9: symmetrically distributed on the top of the fixing template 8, with a fixed end 16 and a movable end 15 at the bottom, which cooperate with the fixing screw 10 to fix the piston shaft of the electric push rod 7; Fixed screw 10: Two fixed parts 9 are threaded together. The reverse thread design allows the two fixed parts 9 to move synchronously when rotated, so as to realize the quick installation and disassembly of the fixed template 8. Guide column 11: Symmetrically arranged on the top of the fixed template 8, penetrating through the guide hole 18 of the fixed guide plate 6, and sleeved with buffer spring 12, serving as a guide and buffer; Buffer spring 12: It is sleeved on the guide post 11 and located between the gasket and the fixed guide plate 6. It is compressed and buffered when pressed down to avoid excessive impact force. Rotating shaft 13: fixed to the top of the support column 3, sleeved with bearing 4, providing an axis for the rotation of the support arm 5, so that the support arm 5 can rotate around it; Slide rail groove 14: The semi-circular arc grooves symmetrically distributed at the top of the support column 3 slide with the slide rail column 17 at the end of the support arm 5 to assist the support arm 5 in adjusting its position; The movable end 15: The T-shaped structure on both sides of the bottom end of the fixing part 9 is embedded in the sliding groove of the auxiliary block 21, so that the fixing part 9 can be moved and adjusted in conjunction with the fixing screw 10; Fixed end 16: The semi-circular structure at the bottom center of the fixing part 9 fits and fixes the piston shaft of the electric push rod 7 to realize power transmission; Slide rail column 17: The two fixing parts 9 at the bottom of the end collar of the support arm 5 are placed in the slide rail groove 14 and slide to assist the support arm 5 in adjusting its position at multiple angles; Guide hole 18: A hole symmetrically distributed on both sides of the fixed guide plate 6, which cooperates with the guide column 11 to ensure the stability and accuracy of the fixed template 8 when it is raised and lowered; Guide connecting ring 19: Fixed on the outside of auxiliary block 21, connected to the end of guide post 11, providing installation positioning and connection structure for guide post 11; Positioning cylinder 20: A circular ring structure at the top center of the fixed template 8, which fits around the piston shaft of the electric push rod 7, and is precisely positioned and fixed by the auxiliary fixing part 9; Auxiliary block 21: Fixed on both sides of positioning cylinder 20, with a T-shaped groove inside, which cooperates with the moving end 15 of fixing part 9 to provide a sliding track; Heating plate 22: Fixed to the bottom of the fixed template 8, it heats the hot riveting head 23 during operation, so that the contact part of the vacuum forming isolation plate is softened by heat; Hot riveting head 23: Located at the bottom of heating plate 22, it is heated and then extruded to form a riveting structure, thus completing the processing.

[0027] Working principle: In the initial state, the support arm 5 is sleeved on the rotating shaft 13 at the top of the support column 3 via the bearing 4. The slide rail column 17 at its end is located in the slide rail groove 14. The support arm 5 can rotate around the rotating shaft 13 within a certain angle range to adjust its position. The fixed template 8 is connected to the fixed guide plate 6 through the fixing component and the buffer component, and is located above the processing support plate 2. When preparing for processing, the operator places the vacuum forming isolation plate on the processing support plate 2. By rotating the support arm 5, the fixed template 8 is adjusted to a suitable position by sliding the slide rail column 17 in the slide rail groove 14. Next, rotate the fixing screw 10. Since the fixing screw 10 and the two fixing parts 9 have reverse internal threads, the two fixing parts 9 will move towards the center simultaneously. When the fixing end 16 at the bottom of the fixing part 9 is fitted onto the piston shaft of the electric push rod 7 and the bottom end of the fixing end 16 is in contact with the piston shaft, the fixing template 8 is securely installed on the piston shaft of the electric push rod 7. At this time, the guide post 11 passes through the guide hole 18 on the fixing guide plate 6, the buffer spring 12 is in the normal state, and the hot riveting process begins. Start the electric push rod 7, the piston shaft extends downward, and drives... The fixed template 8, heating plate 22, and hot riveting head 23 descend together. During the descent, the guide column 11 slides within the guide hole 18 of the fixed guide plate 6, ensuring the stability and accuracy of the descent of the fixed template 8. Simultaneously, the buffer spring 12 is gradually compressed by the pressure of the fixed guide plate 6, providing a buffering effect and preventing excessive impact during descent from damaging the equipment or affecting processing accuracy. When the hot riveting head 23 contacts the thermoforming partition, the heating plate 22 begins to work, heating the hot riveting head 23 to soften the thermoforming partition at the contact point. As the electric push rod 7 piston... As the shaft continues to press down, the hot riveting head 23 squeezes and deforms the softened material to form a riveting structure. After the riveting is completed, the piston shaft of the electric push rod 7 retracts in the opposite direction, driving the fixed template 8, heating plate 22 and hot riveting head 23 to rise and reset. At this time, the buffer spring 12 gradually returns to its original state, assisting the fixed template 8 to rise smoothly. When the hot riveting head 23 leaves the blister pack, a complete hot riveting process is completed. To process blister packs of different specifications, the fixed screw 10 can be disassembled, the fixed template 8 of different specifications can be replaced, and the fixing and processing operations can be repeated.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot riveting device for processing thermoformed partition panels, characterized in that, include: The processing base (1) and the fixed template (8) are provided. The processing base (1) is provided with a processing bearing plate (2) at the top. The processing base (1) is fixedly installed with a support column (3) on the back of the top. The support column (3) is rotatably fitted with a support arm (5) at the top. The support arm (5) is provided with fixed guide plates (6) on both sides of the bottom front end. The support arm (5) is provided with an electric push rod (7) at the top front end. The piston shaft of the electric push rod (7) passes through the bottom end of the support arm (5). The fixed template (8) is provided at the bottom of the fixed guide plate (6). The bottom end of the fixed template (8) is provided with multiple sets of heating plates (22). The bottom end of the heating plate (22) is provided with a hot riveting head (23). The fixed template (8) is located above the processing bearing plate (2). A fixing assembly is provided between the fixed guide plate (6) and the fixed template (8). The fixing includes a fixing member (9) and a fixing screw (10). The fixing member (9) is symmetrically distributed at the top center of the fixed template (8). The fixing screw (10) is threaded between the two fixing members (9). A buffer assembly is provided on the top of the fixed template (8). The buffer assembly includes a guide post (11) and a buffer spring (12). The guide post (11) is provided on both sides of the top of the fixed template (8) and is symmetrically distributed. The buffer spring (12) is sleeved on the guide post (11). The guide post (11) passes through the fixed guide plate (6) for guidance and cooperation.

2. The hot riveting device for processing vacuum-formed partition panels according to claim 1, characterized in that, The top back of the processing base (1) is fixed with a support column (3) by bolts. The top of the support column (3) is fixed with a rotating shaft (13). The top surface of the support column (3) is provided with symmetrically distributed and semi-circular slide rail grooves (14). The slide rail grooves (14) are located on both sides of the rotating shaft (13). The rotating shaft (13) is fitted with a bearing (4).

3. The hot riveting device for processing vacuum-formed partition panels according to claim 2, characterized in that, The end of the support arm (5) is provided with a ring-shaped collar. The bottom end of the collar is fixed with slide rail posts (17). The bearing (4) is engaged inside the collar, and the slide rail posts (17) are set inside the slide rail groove (14) and slide in fit.

4. The hot riveting device for processing vacuum-formed partition panels according to claim 1, characterized in that, The front end of the support arm (5) is fixed with rectangular guide plates (6) on both sides. The guide plates (6) are provided with symmetrically distributed guide holes (18) on both sides. The front end of the support arm (5) is provided with a placement groove. An electric push rod (7) is installed inside the placement groove. The piston shaft of the electric push rod (7) passes through the bottom end of the placement groove.

5. The hot riveting device for processing vacuum-formed partition panels according to claim 1, characterized in that, The fixed template (8) has a ring-shaped positioning cylinder (20) at the top center. Auxiliary blocks (21) are fixed on both sides of the positioning cylinder (20). A T-shaped groove is opened inside the auxiliary block (21). Symmetrical guide connecting rings (19) are fixed on the outside of the auxiliary block (21).

6. The hot riveting device for processing vacuum-formed partition panels according to claim 1, characterized in that, The fixing component consists of a fixing part (9) and a fixing screw (10). A semi-circular fixing end (16) is fixed at the center of the bottom end of the fixing part (9). T-shaped movable ends (15) are fixed on both sides of the bottom end of the fixing part (9). The movable ends (15) are located on both sides of the fixing end (16). Internal threaded holes are provided on both sides of the front end of the fixing part (9).

7. The hot riveting device for processing vacuum-formed partition panels according to claim 6, characterized in that, The fixing member (9) is set on the top of the fixing template (8), and the movable ends (15) on both sides of the bottom of the two fixing members (9) are set in the sliding groove inside the auxiliary block (21). The two fixing members (9) are symmetrically distributed on the top of the fixing template (8). The fixing screw (10) passes through the two fixing members (9) respectively and is threaded. The fixing screw (10) is in reverse engagement with the internal threads of the two fixing members (9).

8. The hot riveting device for processing vacuum-formed partition panels according to claim 7, characterized in that, The piston shaft of the electric push rod (7) is located inside the positioning cylinder (20). The piston shaft of the electric push rod (7) is sleeved by the bottom fixing end (16) of the mutually symmetrical fixing parts (9), and the bottom end of the fixing end (16) is in contact with the piston shaft of the electric push rod (7) for fixing.

9. A hot riveting device for processing vacuum-formed partition panels according to claim 8, characterized in that, The end of the guide post (11) is located inside the guide connecting ring (19). The top of the guide post (11) is fixed with a gasket, and the top of the guide post (11) passes through the fixed guide plate (6) and slides through it using the movable end head (15). The buffer spring (12) is sleeved on the cylindrical surface of the guide post (11). The buffer spring (12) is located at the bottom of the gasket and the top of the fixed guide plate (6).

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