Dispensing fixing tool for vehicle-mounted heater cover plate of automobile

By designing a dispensing fixture with adjustable splints and movable baffles, the problem that existing fixtures cannot adapt to covers of different sizes is solved, and stable fixation and efficient dispensing operations are achieved.

CN223393747UActive Publication Date: 2025-09-30XIAOGAN HUAGONG GAOLI ELECTRONICS CO LTD
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Patent Information

Application Number
CN202422325247.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-24
Publication Date
2025-09-30
Estimated Expiration
2034-09-24

AI Technical Summary

Technical Problem

The existing automobile heater cover jig cannot adapt to the fixation of different sizes, and the operation of the baffles in multiple fixing positions is not uniform, which affects the working efficiency of the dispensing machine.

Method used

A dispensing and fixing tooling was designed, which included an adjustable clamping plate and a movable baffle. The width of the clamping groove could be adjusted and multiple fixing positions could be moved synchronously through a driving mechanism. The tooling was suitable for fixing car heater covers of different sizes.

Benefits of technology

It achieves stable fixation of vehicle heater covers of different sizes, improving the working efficiency and operation uniformity of the dispensing machine.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of automobile part machining equipment, in particular to a dispensing fixing tool for an automobile vehicle-mounted heater cover plate. According to the adhesive dispensing fixing tool for the vehicle-mounted heater cover plate, the adhesive dispensing fixing device can be suitable for fixing the vehicle-mounted heater cover plates of different sizes, and the adhesive dispensing fixing tool can also achieve synchronous movement of baffles of a plurality of adhesive dispensing fixing devices.
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Description

Technical Field

[0001] The utility model relates to the field of automobile parts processing equipment, and more specifically, to a glue dispensing and fixing tool for an automobile heater cover. Background Art

[0002] Automotive connector dispensing is common in the manufacturing of automotive electronics, primarily performed on the circuit boards of automotive connectors to ensure consistent glue deposit quality and ensure safe and stable circuit operation. Dispensing glue on automotive heater covers requires a specialized jig to secure them. Currently, this process involves two opposing clamping plates forming a clamping groove to hold the heater cover in place. A movable baffle acts as a positioning plate to adjust the heater cover's position within the clamping groove, securing it to the fixture. However, existing jigs lack the ability to adjust the width of the clamping groove and cannot accommodate various sizes of heater covers. Furthermore, during field operations, the dispenser dispenses glue on multiple heater covers simultaneously. This creates multiple clamping grooves, creating multiple fixed positions for the heater covers. This prevents the baffles from maintaining uniform operation, impacting the dispenser's efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a dispensing and fixing tool for automobile heater covers. The dispensing and fixing device can be suitable for fixing automobile heater covers of different sizes. The dispensing and fixing tool can also realize the synchronous movement of baffles of multiple dispensing and fixing devices.

[0004] In order to achieve these purposes and other advantages according to the present invention, a dispensing and fixing tool for a vehicle heater cover is provided, comprising:

[0005] a tooling plate having a positioning groove thereon;

[0006] A clamping plate comprising two clamping plates arranged opposite to each other on one side of the positioning groove along a first direction, wherein the clamping plates are both slidably arranged on the tooling plate along the first direction;

[0007] A first driving mechanism, which is connected to the two clamping plates respectively to drive the two clamping plates to move closer to or away from each other;

[0008] a movable baffle, which is slidably disposed on the tooling plate along a second direction perpendicular to the first direction;

[0009] The second driving mechanism is connected to the movable baffle to drive the two clamping plates to move closer to or away from each other.

[0010] The beneficial effects of the utility model are as follows: the two clamping plates are driven by the first driving mechanism so as to move closer to or farther away from each other, and the distance between the clamping grooves formed by the two is adjustable. At the same time, the first driving mechanism drives the movable baffle to move closer to or away from the clamping groove, so that the dispensing fixing device can be suitable for fixing vehicle heater covers of different sizes.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows:

[0012] Furthermore, it also includes a placement slot frame installed on the tooling plate, a notch is provided on the tooling plate, the two clamps are slidably provided on the placement slot frame and both pass through the notch, and the first driving mechanism is provided on the placement slot frame.

[0013] The beneficial effect of adopting the above further solution is: in this further solution, by providing a mounting slot frame, the depth of the automobile heater cover extending into the clamping slot is increased, which facilitates the fixation of large-sized automobile heater covers.

[0014] Furthermore, both ends of the placement slot frame are connected to the tooling plate through support frames.

[0015] The beneficial effect of adopting the above further solution is: in this further solution, both ends of the placement slot frame are connected to the tooling plate through support frames respectively, which can increase the distance between the placement slot frame and the tooling plate.

[0016] Furthermore, the first driving mechanism includes two electric telescopic rods, which are telescopic along the first direction, and one end of each electric telescopic rod is connected to the two clamping plates respectively, and the other end of each electric telescopic rod is connected to the two support frames respectively through a connecting frame.

[0017] The beneficial effect of adopting the above further scheme is: in this further scheme, the electric telescopic rod passes through the support frame and is connected to the two support frames through the connecting frame. The two splints are driven to move along the first direction by the extension and contraction of the electric telescopic rod, thereby adjusting the distance between the two splints.

[0018] Furthermore, an extension baffle parallel to the movable baffle is detachably provided at one end of the movable baffle away from the tooling plate.

[0019] The beneficial effect of adopting the above-mentioned further scheme is: in this further scheme, the height of the movable baffle is generally fixed, but the position where it contacts the vehicle heater body of different sizes is different. By connecting an extension baffle to the movable baffle, the height of the movable baffle can be increased, and different height positions of the vehicle heater body can be blocked, thereby being suitable for vehicle heaters of more sizes.

[0020] Furthermore, it also includes:

[0021] A card frame, with card connectors at both ends;

[0022] The movable baffle is provided with a mounting groove at one end away from the tooling plate, and the extended baffle extends into the mounting groove. Two groups of first card slot groups are spaced apart on the groove wall of the mounting groove, and the first card slot group includes at least two first card slots. The extended baffle is provided with second card slots corresponding to the two groups of the first card slot groups respectively, and the second card slot can be connected with any corresponding first card slot to form a card connection channel corresponding to the card connector.

[0023] The beneficial effect of adopting the above-mentioned further scheme is: in this further scheme, when the length of the part of the extended baffle extending into the installation groove is different, the second card slot on the extended baffle can be moved to connect with the first card slot at different positions. At this time, the card connector is inserted into the connected first card slot and second card slot to fix the extended baffle and the movable baffle, and the position of the extended baffle can be adjusted according to actual needs.

[0024] Furthermore, the movable baffle is connected to a fixing frame, the fixing frame is provided with at least one through hole, the tooling plate is provided with a card hole group equal in number to and corresponding to the through holes, the card hole group includes a plurality of card holes arranged at intervals along the second direction, and during the sliding process of the movable baffle, the through hole can slide to be connected with any of the card holes, and the movable baffle and the tooling plate are connected and fixed by a card rod provided in the through hole and the card hole.

[0025] The beneficial effect of adopting the above-mentioned further scheme is: in this further scheme, in order to ensure the stability of the dispensing fixing device when fixing the automobile heater cover, a fixing bracket is set on the movable baffle. During the sliding process of the movable baffle driven by the second driving mechanism, the through holes on the fixing bracket are connected with the card holes at different positions, and the card rod is inserted to connect and fix the movable baffle and the tooling plate.

[0026] Furthermore, a slide groove extending along the second direction is provided on the tooling plate, the movable baffle is slidably arranged in the slide groove through a slider, and the slider passes through the slide groove and is transmission-connected to the second driving mechanism.

[0027] The beneficial effect of adopting the above further solution is that in this further solution, the sliding block is restricted from sliding along the second direction by the sliding groove, thereby allowing the movable baffle to slide on the tooling plate along the second direction. Multiple sliding blocks can be provided to improve the stability of the sliding connection between the movable baffle and the tooling plate.

[0028] Furthermore, the second driving mechanism includes:

[0029] a movable bottom support plate, to which the sliders are connected, and provided with a rack extending along the second direction;

[0030] a motor, which is arranged on the tooling plate;

[0031] A gear is mounted on the output shaft of the motor and meshes with the rack.

[0032] The beneficial effect of adopting the above-mentioned further scheme is: in this further scheme, the gear is driven to rotate by the motor. Since the movable baffle can only slide along the second direction, the gear will drive the rack to move along the second direction during rotation, thereby driving the movable bottom support plate to move along the second direction, thereby realizing that the second driving mechanism drives the movable baffle to slide along the second direction.

[0033] Furthermore, the clamping plate, the first driving mechanism and the movable baffle constitute a placement unit, at least two groups of the placement units are distributed on the tooling plate along the first direction, the movable bottom support plates of the two adjacent groups of the placement units are connected by a connecting plate frame, and the second driving mechanism is connected to the movable baffle of one group of the placement units.

[0034] The beneficial effect of adopting the above-mentioned further scheme is: in this further scheme, at least two groups of placement units are set on the glue placement tooling, and the placement units are distributed along the first direction. At this time, only the movable baffle of one group of placement units is connected to the second driving mechanism, and the two adjacent movable bottom support plates are connected through the connecting plate frame, so that the movable bottom support plates of all placement units are connected together, and the corresponding movable bottom support plates are driven to move by the only group of second driving mechanisms, and the movable bottom support plates then drive all other movable bottom support plates to move synchronously, so that the synchronous movement of all movable baffles can be realized, thereby ensuring the unified adjustment and sliding of multiple movable baffles.

[0035] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of the dispensing and fixing tooling described in the present utility model;

[0037] Figure 2 This is a structural diagram of the dispensing and fixing tooling described in the present utility model;

[0038] Figure 3 This is a cross-sectional view of the dispensing and fixing tooling described in the present utility model;

[0039] Figure 4 This is a bottom view of the dispensing and fixing tooling of the present invention;

[0040] Figure 5 This is a top view of the glue dispensing and fixing tooling described in the present invention.

[0041] Among them, the figure marks are represented as: 1. tooling plate; 2. notch; 3. slide groove; 4. slider; 5. movable baffle; 6. first movable bottom support plate; 7. support plate bolt; 8. second movable bottom support plate; 9. third movable bottom support plate; 10. connecting plate frame; 11. plate frame bolt; 12. rack; 13. gear; 14. DC motor; 15. extension baffle; 16. baffle slot; 17. extension baffle slot; 18. bracket; 19. fixing frame; 20. clamping rod; 21. clamping hole; 22. placement slot frame; 23. support frame; 24. support frame bolt; 25. electric telescopic rod; 26. splint; 27. vehicle heater body; 28. connecting frame. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the embodiments so that those skilled in the art can implement the invention with reference to the description.

[0043] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] like Figure 1-Figure 5 As shown, the embodiment of the present invention provides a dispensing and placing tool for a vehicle heater cover, comprising three groups of dispensing and fixing devices, at least two groups of which are distributed along the first direction and share a group of the second driving mechanism, and two adjacent movable bottom support plates are connected by a connecting plate frame. Figure 1-5The first direction is the left and right direction, and the second direction is the front and back direction. Specifically, it includes a tooling plate 1, and three movable baffles 5 are slidably connected to the upper surface of the tooling plate 1. Three sliders 4 are installed at the bottom of the three movable baffles 5. Multiple sliders 4 are respectively slidably connected to slide grooves 3. Multiple slide grooves 3 are equidistantly arranged on the tooling plate 1, and a first movable bottom support plate 6, a second movable bottom support plate 8 and a third movable bottom support plate 9 are respectively provided on the lower surface of the tooling plate 1. A connecting plate frame 10 is connected between the first movable bottom support plate 6 and the second movable bottom support plate 8, and between the second movable bottom support plate 8 and the third movable bottom support plate 9. The two connecting plate frames 10 are equidistantly and detachably connected with plate frame bolts 11. Threaded holes are set on the movable bottom support plate. The plate frame bolts 11 are threadedly connected to the threaded holes on the movable bottom support plate to fix the connecting plate frame 10 on the movable bottom support plate.The lower surfaces of the first movable bottom support plate 6, the second movable bottom support plate 8 and the third movable bottom support plate 9 are all removable with three support plate bolts 7, the lower end of the slider 4 is provided with threaded holes corresponding to the support plate bolts 7, and is threadedly connected to the slider 4 through the support plate bolts 7. A rack 12 is installed on the side of the first movable bottom support plate 6 close to the second movable bottom support plate 8, the rack 12 is meshed with the gear 13, and the bottom of the gear 13 is fixedly connected to the output end of the DC motor 14. Three notches 2 are provided on the front side of the upper surface of the tooling plate 1, and a placement slot rack 22 is provided in the three notches 2. Brackets 23 are provided on the left and right sides of the lower surface of the three placement slot racks 22, and multiple brackets 23 are provided on There are multiple support bolts 24 equidistantly and detachably connected, and multiple support bolts 24 are equidistantly and detachably connected to the lower surface of the tooling plate 1. The upper surfaces of the three placement slot frames 22 are slidably connected with clamping plates 26 on both sides. The bottoms of the multiple clamping plates 26 on the left and right sides are respectively engaged with electric telescopic rods 25. The cylinders of the multiple electric telescopic rods 25 pass through the corresponding right support frames 23. Three sliders 4 are designed at the bottom of the three movable baffles 5. Each of the three sliders 4 is installed together with the corresponding first movable bottom support plate 6, second movable bottom support plate 8 and third movable bottom support plate 9 through support plate bolts 7. Each of the three sliders 4 has a sliding position slot 3. The first movable bottom support plate 6, the second movable bottom support plate 8 and the third movable bottom support plate 9 are installed together through the connecting plate frame 10 and are easy to disassemble. The first movable bottom support plate 6 is installed near the second movable bottom support plate 8. The gear 13 engaged with the rack 12 is driven to rotate by the DC motor 14. The positive and negative rotation of the gear 13 driven by the DC motor 14 will drive the rack 12 to move back and forth. The forward and backward movement of the rack 12 will drive the first movable bottom support plate 6 to move, and the second movable bottom support plate 8 and the third movable bottom support plate 9 connected to the first movable bottom support plate 6 will also move. The first movable bottom support plate 6, the second movable bottom support plate 8 and the third movable bottom support plate 9 will also move. The movement of the movable bottom support plate 8 and the third movable bottom support plate 9 causes the connected movable baffle 5 to slide. The original area of ​​the three notches 2 is fixed. Each notch 2 is designed with a placement slot 22. The tooling plate 1 is provided with threaded holes corresponding to the bracket bolts 24. Each placement slot 22 is installed via the bracket bolts 24. Each placement slot 22 has two sliding clamps 26 at the top. The clamps 26 are driven by an electric telescopic rod 25 to slide. The two clamps 26 move closer or farther, expanding or reducing the area within the notch 2 and the placement slot 22 to accommodate the placement of different heater sizes. The first movable bottom support plate 6, the second movable bottom support plate 8, and the third movable bottom support plate 9 are all slidably connected to the bottom surface of the tooling plate 1. The bottoms of the two connecting plate frames 10 are lower than the bottom of the DC motor 14. The connecting plate frames 10 are used to connect the first movable bottom support plate 6, the second movable bottom support plate 8, and the third movable bottom support plate 9 and are driven by the DC motor 14 to move.

[0045] Multiple clamps 26 are close to or away from the vehicle heater body 27, and the vehicle heater body 27 is placed in the corresponding notch 2. A placement slot frame 22 is set in the notch 2. Each placement slot frame 22 has two movable clamps 26 to adjust the distance, and the area on the placement slot frame 22 and the notch 2 is expanded or reduced to accommodate the placement of the vehicle heater body 27.

[0046] A connecting frame 28 is installed on the cylinder body of the multiple electric telescopic rods 25. The multiple connecting frames 28 are respectively installed on the corresponding placement slot frames 22. The connecting frames 28 play a supporting and fixing role for the electric telescopic rods 25.

[0047] In the above embodiment, three sliders 4 are designed at the bottom of the three movable baffles 5, and each of the three sliders 4 is installed together with the corresponding first movable bottom support plate 6, second movable bottom support plate 8 and third movable bottom support plate 9 through support plate bolts 7. Each of the three sliders 4 has a sliding position slot 3, and the first movable bottom support plate 6, the second movable bottom support plate 8 and the third movable bottom support plate 9 are installed together through the connecting plate frame 10 and are easy to disassemble. A rack 12 is installed at the position of the first movable bottom support plate 6 near the second movable bottom support plate 8, and a gear 13 meshing with the rack 12 is driven by a DC current. The machine 14 drives to rotate, and the forward and reverse rotation of the gear 13 driven by the DC motor 14 will drive the rack 12 to move forward and backward, and the forward and backward movement of the rack 12 will drive the first movable bottom support plate 6 to move, and the second movable bottom support plate 8 and the third movable bottom support plate 9 connected to the first movable bottom support plate 6 also move, and the movement of the first movable bottom support plate 6, the second movable bottom support plate 8 and the third movable bottom support plate 9 will drive the connected movable baffle 5 to slide into position, and the glue placement tooling of the automobile heater cover has the function of uniformly adjusting the sliding of multiple movable baffles.

[0048] Preferably, as another embodiment of the present invention, Figure 1On the basis of the embodiment shown, the three movable baffles 5 are all slidably connected with an extension baffle 15, and the bottoms of the multiple extension baffles 15 are provided with an extension baffle slot 17. The three movable baffles 5 are equidistantly provided with a plurality of movable baffle slots 16, and the multiple extension baffle slots 17 are respectively adapted to the multiple movable baffle slots 16. The multiple movable baffle slots 16 and the multiple extension baffle slots 17 are respectively engaged with a card frame 18, and the two ends of the card frame 18 are respectively provided with a card connector. The height of the movable baffle 5 is generally fixed, blocking the vehicle-mounted loading The position of the heater body 27 is the same. By designing an extended baffle 15 inside the movable baffle 5, the height of the movable baffle 5 can be increased, and the different height positions of the vehicle heater body 27 can be blocked. The specific extension height is that an extended baffle slot 17 is designed at the bottom of the extended baffle 15, and a movable baffle slot 16 is designed at different positions of the movable baffle 5. The extended baffle slot 17 on the extended baffle 15 can be aligned with the movable baffle slots 16 of different heights and then fixed by the bracket 18.

[0049] In the above embodiment, the height of the movable baffle 5 is generally fixed, and the position of blocking the vehicle heater body 27 is the same. By designing an extension baffle 15 inside the movable baffle 5, the height of the movable baffle 5 can be increased, and the vehicle heater body 27 can be blocked at different height positions. The specific extension height is that an extension baffle slot 17 is designed at the bottom of the extension baffle 15, and a mobile baffle slot 16 is designed at different positions of the mobile baffle 5. The extension baffle slot 17 on the extension baffle 15 can be aligned with the mobile baffle slots 16 of different heights and then fixed by the bracket 18. The dispensing and placement tooling of the automobile heater cover has the function of adjusting the height of the heater baffle.

[0050] Preferably, as another embodiment of the present invention, Figure 1 On the basis of the embodiment shown, a fixing frame 19 is installed at the bottom of the rear side of the three movable baffles 5, and a plurality of card holes 21 are equidistantly provided between the plurality of slide grooves 3. A card rod 20 is passed through the left and right sides of the plurality of fixing frames 19, and the plurality of card rods 20 are respectively engaged with the corresponding card holes 21. The movable baffle 5 can be moved manually. Figure 3 As shown, a fixing frame 19 is installed on the movable baffle 5, and a clamping rod 20 is inserted through the fixing frame 19. A plurality of clamping holes 21 are set at the bottom position of each movable baffle 5 on the tooling plate 1. The positions of the clamping holes 21 are different. The movable baffle 5 and the fixing frame 19 can be aligned with the clamping holes 21 at different positions and fixed by the clamping rod 20 to move the movable baffle 5 to different positions.

[0051] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A dispensing and fixing tool for a car heater cover, characterized in that: include: a tooling plate having a positioning groove thereon; A clamping plate comprising two clamping plates arranged opposite to each other on one side of the positioning groove along a first direction, wherein the clamping plates are both slidably arranged on the tooling plate along the first direction; A first driving mechanism, which is connected to the two clamping plates respectively to drive the two clamping plates to move closer to or away from each other; a movable baffle, which is slidably disposed on the tooling plate along a second direction perpendicular to the first direction; The second driving mechanism is connected to the movable baffle to drive the two clamping plates to move closer to or away from each other.

2. The glue dispensing and fixing tool for a vehicle heater cover as claimed in claim 1, characterized in that: It also includes a placement slot frame installed on the tooling plate, the tooling plate is provided with a notch, the two clamping plates are slidably arranged on the placement slot frame and both pass through the notch, and the first driving mechanism is arranged on the placement slot frame.

3. The glue dispensing and fixing tool for the cover of a vehicle heater as claimed in claim 2, characterized in that: Both ends of the placement slot frame are connected to the tooling plate through supporting frames respectively.

4. The glue dispensing and fixing tool for the cover of the vehicle heater as claimed in claim 3, characterized in that: The first driving mechanism includes two electric telescopic rods, which are telescopically extended along the first direction. One end of the two electric telescopic rods is respectively connected to the two clamping plates, and the other end of the two electric telescopic rods is respectively connected to the two support frames through a connecting frame.

5. The glue dispensing and fixing tool for a vehicle heater cover as claimed in claim 1, characterized in that: An extension baffle parallel to the movable baffle is detachably provided on one end of the movable baffle away from the tooling plate.

6. The glue dispensing and fixing tool for the cover of a vehicle heater as claimed in claim 5, characterized in that: Also includes: A card frame, with card connectors at both ends; The movable baffle is provided with a mounting groove at one end away from the tooling plate, and the extended baffle extends into the mounting groove. Two groups of first card slot groups are spaced apart on the groove wall of the mounting groove, and the first card slot group includes at least two first card slots. The extended baffle is provided with second card slots corresponding to the two groups of the first card slot groups respectively, and the second card slot can be connected with any corresponding first card slot to form a card connection channel corresponding to the card connector.

7. The glue dispensing and fixing tool for the cover of a vehicle heater as claimed in claim 6, characterized in that: The movable baffle is connected to a fixing frame, and the fixing frame is provided with at least one through hole. The tooling plate is provided with a card hole group equal in number to and corresponding to the through holes. The card hole group includes a plurality of card holes spaced apart along the second direction. During the sliding process of the movable baffle, the through hole can slide to be connected with any of the card holes, and the movable baffle and the tooling plate are connected and fixed by a card rod provided in the through hole and the card hole.

8. A dispensing and fixing tool for a vehicle heater cover according to any one of claims 1 to 7, characterized in that: The tooling plate is provided with a slide groove extending along the second direction, the movable baffle is slidably arranged in the slide groove through a slider, and the slider passes through the slide groove and is transmission-connected to the second driving mechanism.

9. The glue dispensing and fixing tool for a vehicle heater cover as claimed in claim 8, characterized in that: The second driving mechanism comprises: a movable bottom support plate, to which the sliders are connected, and provided with a rack extending along the second direction; a motor, which is arranged on the tooling plate; A gear is mounted on the output shaft of the motor and meshes with the rack.

10. The glue dispensing and fixing tool for a vehicle heater cover as claimed in claim 9, characterized in that: The clamping plate, the first driving mechanism and the movable baffle constitute a placement unit. At least two groups of the placement units are distributed along the first direction on the tooling plate. The movable bottom support plates of two adjacent groups of the placement units are connected by a connecting plate frame. The second driving mechanism is connected to the movable baffle of one group of the placement units.