Spraying shielding jig and spraying shielding tool

Abstract

The utility model discloses a shielding and spraying jig and a shielding and spraying tool, the shielding and spraying jig comprises an end cover, a bracket and back glue, and the bracket is used for supporting and fixing a piece to be sprayed; one end of the gum is fixed to the end cover, the other end of the gum is used for being bonded to a boss on the outer wall of a to-be-sprayed piece, the area of the boss is larger than that of the gum, and the gum and the boss are covered with the end cover so as to carry out spraying shielding treatment on the boss. The end cover is adhered to the boss on the outer wall of the to-be-sprayed piece through the back glue, so that the boss is subjected to shielding spraying treatment in the spraying process, traditional magnetic attraction butt joint shielding spraying, cantilever gland shielding spraying and sticker shielding spraying schemes are replaced, local shielding spraying of the to-be-sprayed piece is achieved, operation is simple and convenient, the area of the boss is larger than that of the back glue, and the spraying effect is good. The end cover fixed with the gum can be well detached from a sprayed product, the gum can be repeatedly used, the local spraying shielding effect of the appearances of different pieces to be sprayed can be more accurately and conveniently met, the manufacturing cost of the spraying shielding jig is reduced, and the spraying efficiency and the productivity are improved.

Description

Technical Field

[0001] This utility model relates to the field of fixture structure technology, and in particular to a spray masking fixture and spray masking tooling. Background Technology

[0002] Currently, most smart wearable products on the market, such as smart bracelets and smartwatches, use a spray painting process to paint their outer surfaces. Some outer surfaces require partial masking. If the masking area has holes, the top and bottom covers can be fastened together to achieve masking. If the masking area does not have holes or a direct positioning structure, such as only masking the protrusions on the outer wall of the shell, a magnetically attached top and bottom cover can be used to clamp the protrusions, or a cantilever cover can be placed on the protrusions, or adhesive tape can be applied to the entire protrusion area of ​​the shell to achieve the masking effect.

[0003] However, the magnetic coupling solution using a top and bottom cover with magnetic attraction is not accurate in positioning and is prone to misalignment; while the cantilever cap solution is accurate, it cannot avoid the appearance of uneven surfaces near the cantilever; and while the full sticker solution is accurate, it is too inefficient. Utility Model Content

[0004] This utility model provides a masking fixture and masking tooling, aiming to solve the technical problems of existing masking treatment for protrusions on the outer wall of the shell. The existing masking solution using a magnetically attached upper and lower cover is not accurate in positioning and is prone to misalignment; the cantilever cover solution is accurate, but it cannot avoid the appearance of uneven surfaces near the cantilever; and the full sticker solution is accurate, but it is too inefficient.

[0005] This utility model provides a spray masking fixture, comprising:

[0006] End cap;

[0007] The bracket is used to support and fix the part to be sprayed;

[0008] The adhesive backing has one end fixed to the end cap and the other end used to adhere to the protrusion on the outer wall of the part to be sprayed. The area of ​​the protrusion is larger than the area of ​​the adhesive backing. The end cap covers the adhesive backing and the protrusion to mask the protrusion during spraying.

[0009] Furthermore, the bracket includes a support plate and a support column protruding from the bottom of the support plate, and the support plate is provided with a receiving groove for fixing the part to be sprayed.

[0010] Furthermore, the bracket is also provided with a storage cavity and a perforation. The storage cavity is recessed in the bottom wall of the receiving groove, and the perforation extends from the bottom wall of the storage cavity through the tray and the support column in sequence.

[0011] Furthermore, the bracket also includes an annular support plate for abutting against the inner wall of the part to be sprayed. The annular support plate protrudes from the bottom wall of the receiving cavity and is correspondingly arranged with the end cap.

[0012] Furthermore, the bracket also includes at least one support portion for abutting against the inner wall of the part to be sprayed, the support portion protruding from the inner wall of the receiving cavity and located beside the annular support plate.

[0013] Furthermore, the bracket also includes two hooks for engaging with two blocks on the inner wall of the part to be sprayed, and both hooks protrude from the bottom wall of the receiving cavity.

[0014] Furthermore, the end cap includes a cap body and a handle protruding from the cap body, the adhesive backing is fixed to the cap body, and the cap body can cover the adhesive backing and the protrusion.

[0015] Furthermore, the cover is provided with a limiting groove and a recessed platform. The recessed platform is recessed on the inner wall of the limiting groove, the adhesive backing is bonded to the recessed platform, and the protrusion can be accommodated in the limiting groove.

[0016] Furthermore, the spray masking fixture also includes at least one spray masking rod, and the bracket is also provided with at least one positioning hole. One end of the spray masking rod is used to be installed in the clip hole of the part to be sprayed, and the other end is inserted into the positioning hole.

[0017] This utility model also provides a masking fixture, including a positioning seat and at least one masking jig as described above. The positioning seat is provided with at least one receiving groove, at least one positioning groove, at least one positioning cavity, and at least one clearance hole. The positioning groove is located on the bottom wall of the receiving groove, the positioning cavity is located on the bottom wall of the positioning groove, and the clearance hole is located on the bottom wall of the positioning cavity. The part to be sprayed includes a base shell and a boss protruding from the outer wall of the base shell. When the part to be sprayed is pressed against the positioning seat by the adhesive and the end cap, the bracket is inserted into the receiving groove, the base shell is fixed on the bracket and located in the positioning groove, the boss, the adhesive and part of the end cap are located in the positioning cavity, and the other part of the end cap is located in the clearance hole.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0019] This invention relates to an end cap that is adhesively attached to a protrusion on the outer wall of the part to be sprayed, allowing for masking of the protrusion during the spraying process. This replaces traditional methods such as magnetic dowel masking, cantilever cap masking, and sticker masking, achieving partial masking of the part. The operation is simple and convenient, and the area of ​​the protrusion is larger than that of the adhesive, making it easy to remove the adhesive-attached end cap from the sprayed product. Compared to sticker masking, since the adhesive only serves an adhesive function, it can be reused multiple times, providing more precise and convenient partial masking for different parts. This reduces the manufacturing cost of masking fixtures, improves spraying efficiency and production capacity, and is suitable for widespread application. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the part to be sprayed being installed on the spray masking fixture according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 A schematic diagram of the structure of the bracket provided in an embodiment of this utility model;

[0023] Figure 4 A schematic diagram of the structure of the component to be sprayed provided in this embodiment of the utility model. Figure 1 ;

[0024] Figure 5 A schematic diagram of the structure of the component to be sprayed provided in this embodiment of the utility model. Figure 2 ;

[0025] Figure 6 A schematic diagram of the end cap structure provided in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the part to be sprayed being mounted on the masking fixture according to an embodiment of the present invention. Figure 1 ;

[0027] Figure 8 for Figure 7 A sectional view;

[0028] Figure 9 for Figure 7 Exploded view;

[0029] Figure 10 This is a schematic diagram of the structure of the part to be sprayed being mounted on the masking fixture according to an embodiment of the present invention. Figure 2 ;

[0030] Figure 11 A schematic diagram of the positioning seat provided in an embodiment of this utility model;

[0031] Figure 12 for Figure 11 A sectional view.

[0032] In the picture:

[0033] 10. End cap; 11. Cap body; 111. Limiting groove; 112. Sunken platform; 12. Handle; 20. Bracket; 21. Support plate; 211. Receiving groove; 22. Support column; 23. Storage cavity; 24. Perforation; 25. Annular support plate; 26. Support part; 27. Hook; 28. Positioning hole; 30. Adhesive backing; 40. Part to be sprayed; 41. Boss; 42. Locking block; 43. Locking hole; 44. Base shell; 50. Spray masking rod; 51. First rod body; 52. Second rod body; 53. Annular protrusion plate; 60. Positioning seat; 61. Storage groove; 62. Positioning groove; 63. Positioning cavity; 64. Clearance hole; 65. Clearance space. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] Please see Figures 1 to 6 As shown in the figure, this utility model embodiment discloses a masking fixture, including an end cap 10, a bracket 20, and adhesive 30. The bracket 20 is used to support and fix the part to be sprayed 40. The bracket 20 can be connected to the inner wall and edge of the part to be sprayed 40, and the outer wall of the part to be sprayed 40 is exposed. One end of the adhesive 30 is fixed to the end cap 10, and the other end is used to adhere to the boss 41 on the outer wall of the part to be sprayed 40. The adhesive 30 plays an adhesive role, and the area of ​​the boss 41 is larger than the area of ​​the adhesive 30. The end cap 10 covers the adhesive 30 and the boss 41 to perform masking treatment on the boss 41. The adhesive 30 can be reused multiple times. This masking fixture has low manufacturing cost, improves spraying efficiency, realizes partial masking of the part to be sprayed 40, and is suitable for large-scale promotion. The part to be sprayed 40 is an outer shell.

[0036] In this embodiment, the bracket 20 includes a support plate 21 and a support column 22 protruding from the bottom of the support plate 21. The support column 22 has a square structure. The bracket 20 can be placed on the table through the support column 22. The support plate 21 is provided with a receiving groove 211 for fixing the part to be sprayed 40. When the part to be sprayed 40 is placed in the receiving groove 211, it can effectively prevent the part to be sprayed 40 from moving in the lateral and longitudinal directions relative to the bracket 20.

[0037] The bracket 20 is also provided with a storage cavity 23 and a through hole 24. The storage cavity 23 is recessed in the bottom wall of the receiving groove 211. The through hole 24 passes through the bottom wall of the storage cavity 23 in sequence through the tray 21 and the support column 22, so that the part to be sprayed 40 is spaced apart from the bottom wall of the storage cavity 23, which makes it easy to quickly remove the part to be sprayed 40 from the bracket 20. The structure of the bracket 20 can be designed according to the specific internal structure of the part to be sprayed 40.

[0038] The bracket 20 also includes an annular support plate 25 for abutting against the inner wall of the receiving spray piece 40. The annular support plate 25 protrudes from the bottom wall of the receiving cavity 23. The annular support plate 25 is correspondingly arranged with the end cap 10. The annular support plate 25 can abut against the middle position of the receiving spray piece 40 to support the middle of the receiving spray piece 40. The perforation 24 is located inside the annular support plate 25.

[0039] The bracket 20 also includes at least one support portion 26 for abutting against the inner wall of the receiving sprayer 40. The support portion 26 protrudes from the inner wall of the receiving cavity 23 and is located beside the annular support plate 25. The number and shape of the support portion 26 can be set according to the needs of the sprayer 40. The support portion 26 can support the sprayer 40.

[0040] The bracket 20 also includes two hooks 27 for engaging with two locking blocks 42 on the inner wall of the part to be sprayed 40. Both hooks 27 protrude from the bottom wall of the receiving cavity 23 to prevent the part to be sprayed 40 from detaching from the bracket 20 during the spraying process.

[0041] In this embodiment, the end cap 10 includes a cover body 11 and a handle 12 protruding from the cover body 11. Adhesive 30 is fixed to the cover body 11. The cover body 11 can cover the adhesive 30 and the boss 41 to mask the boss 41. If the end cap 10, adhesive 30 and bracket 20 are accidentally sprayed, it will not have much impact on the part to be sprayed 40. The adhesive 30 can be reused until the adhesive force on the adhesive 30 is less than the centrifugal force of automatic spraying. Then, the adhesive 30 can be replaced according to the specific situation of the production line. The handle 12 is generally conical. The height and angle of the handle 12 need to be designed according to the spraying angle and the size of the cover body 11 to avoid affecting the spraying. At the same time, attention should be paid to the structural strength to avoid easy breakage, and it should also be easy to disassemble and assemble.

[0042] The cover 11 is provided with a limiting groove 111 and a recessed platform 112. The recessed platform 112 is recessed on the inner wall of the middle part of the limiting groove 111. The adhesive 30 is bonded to the recessed platform 112. The middle adhesive 30 should be far away from the edge of the boss 41 and meet the bonding area. The boss 41 can be accommodated in the limiting groove 111 so that the cover 11 can completely cover the boss 41 of the part to be sprayed 40. The edge of the cover 11 should be as thin as possible and close to the spray masking surface of the part to be sprayed 40 to prevent obvious oil splatter, avoid poor appearance of the product after spraying, and ensure that its structural strength can meet the requirements of multiple sprayings.

[0043] In this embodiment, the masking fixture also includes at least one masking rod 50, the bracket 20 is also provided with at least one positioning hole 28, and the workpiece to be sprayed 40 is provided with at least one locking hole 43. The locking hole 43 is used to install the charging pin and needs to avoid spraying. There are two masking rods 50, two positioning holes 28 and two locking holes 43. One end of the masking rod 50 is used to be installed in the locking hole 43 of the workpiece to be sprayed, and the other end is inserted into the positioning hole 28 to prevent the masking rod 50 from shaking in the locking hole 43 during the painting process.

[0044] Please refer to further information. Figures 2 to 4 ,as well as Figures 7 to 12 This utility model also discloses a masking fixture, including a positioning seat 60 and at least one masking jig as described above. The positioning seat 60 is provided with at least one receiving groove 61, at least one positioning groove 62, at least one positioning cavity 63, and at least one clearance hole 64. The positioning groove 62 is provided on the bottom wall of the receiving groove 61, the positioning cavity 63 is provided on the bottom wall of the positioning groove 62, and the clearance hole 64 is provided on the bottom wall of the positioning cavity 63 and penetrates through the positioning seat 60. The part to be sprayed 40 includes a base shell 44 and the boss 41 protruding from the outer wall of the base shell 44. The locking hole 43 and the locking block 42 are both provided on the base shell 44. When the part to be sprayed 40 is fixed to the bracket 20 When the part to be sprayed 40 is pressed against the positioning seat 60 by the corresponding adhesive 30 and end cap 10, the bracket 20 is inserted into the storage groove 61, the base shell 44 is fixed on the bracket 20 and located in the positioning groove 62, the boss 41, the adhesive 30 and part of the end cap 10, i.e. the cover body 11, are all located in the positioning cavity 63, and the other part of the end cap 10, i.e. the handle 12, is located in the clearance hole 64. The handle 12 needs to be more open in the clearance hole 64. The clearance hole 64 can be set as a stepped hole to avoid the handle 12 being easily bumped when it is taken out, which would affect the bonding effect. The positioning seat 60 can accurately position the end cap 10 onto the boss 41 on the surface of the part to be sprayed 40 by the adhesive 30.

[0045] It should be noted that the positioning seat 60 can position the part to be sprayed 40 in both the horizontal and vertical directions, while the adhesive 30 can position the part to be sprayed 40 in the vertical direction. The adhesive 30 and the end cap 10 are held together with a pressure of 20-30 Newtons for 10 seconds to ensure full adhesion. After the adhesive 30 is bonded to the boss 41, the pressure is mainly maintained for 10 seconds using the weight of the bracket 20 and the part to be sprayed 40 itself. This pressure is much less than the 20-30 Newtons pressure maintained for 10 seconds, thus the local adhesive force on the part to be sprayed 40 will be less than the adhesive force of the adhesive 30 on the end cap 10. To facilitate easy disassembly after spraying and allow for repeated reuse, thereby saving costs and increasing production capacity, the positioning seat 60 needs to be removed before spraying. The masking fixture will be installed on the automated production line, where the spraying speed is typically 300–800 rpm. The adhesive force between the end cap 10 and the part to be sprayed 40 can resist the centrifugal force during the automated spraying process. This masking fixture can improve the yield of partial masking of the Huawei 6th generation smart band (FD188-B69) shell from 30% with the magnetic solution to over 95% after adopting this solution. Moreover, this solution is simple to operate, has high yield and efficiency, and is easy to mass produce.

[0046] In some embodiments, there are multiple masking fixtures, receiving slots 61, positioning slots 62, positioning cavities 63, and clearance holes 64. Each masking fixture is correspondingly set with a receiving slot 61, positioning slot 62, positioning cavity 63, and clearance hole 64, which can perform masking treatment on multiple parts 40 to be sprayed at one time on the positioning seat 60, thereby increasing production capacity.

[0047] The spray shielding rod 50 includes a first rod 51, a second rod 52, and an annular protrusion 53. The first rod 51 and the second rod 52 are coaxially arranged and connected. The outer diameter of the first rod 51 is smaller than the outer diameter of the second rod 52. The annular protrusion 53 protrudes from the outer wall of the second rod 52 and is located close to the first rod 51. The locking hole 43 is a countersunk hole. The positioning seat 60 is also provided with at least one clearance position 65, which is connected to the positioning groove 62. One end of the second rod 52 with the annular protrusion 53 is located in the locking hole 43, and the first rod 51 is located in the positioning hole 28. If the length of the second rod 52 is sufficient, it can be located in the clearance position 65 to ultimately achieve spray shielding treatment of the locking hole 43. There are four clearance positions 65. Two clearance positions 65 are opened on each side of the positioning seat 60 to facilitate assembly regardless of left or right direction and improve work efficiency.

[0048] The usage method of the spray masking tool is as follows:

[0049] Step S101: Fix the part to be sprayed 40 on the bracket 20. First, fix the part to be sprayed 40 in the receiving groove 211 of the bracket 20, wherein the outer surface of the part to be sprayed 40 is exposed. The annular support plate 25 and each support part 26 on the bracket 20 abut against the inner wall of the part to be sprayed 40. The hook 27 on the bracket 20 is engaged with the locking block 42 of the part to be sprayed 40.

[0050] Step S102: Fix the adhesive 30 and end cap 10. Stick the adhesive 30 to the end cap 10 and apply a certain pressure to it. Then place the cover 11 of the end cap 10 into the corresponding positioning cavity 63 of the positioning seat 60, and the handle 12 is located in the clearance hole 64.

[0051] Step S103: Fix the spray shielding rod 50, install the middle part of the spray shielding rod 50 into the snap hole 43 of the outer shell in step S101, and insert the bottom end of the spray shielding rod 50 into the positioning hole 28.

[0052] Step S104: Fix the adhesive 30 onto the part to be sprayed 40. Rotate the spray masking fixture with the part to be sprayed 40 installed in step S103 by 180 degrees and install it on the positioning seat 60 in step S102. The adhesive 30 is bonded to the boss 41 of the part to be sprayed 40. At this time, the bracket 20 is inserted into the receiving groove 61 of the positioning seat 60. The base shell 44 of the part to be sprayed 40 is fixed in the receiving groove 211 of the bracket 20 and is located in the positioning groove 62 of the positioning seat 60. The boss 41, the adhesive 30 and the cover 11 of the end cap 10 are all located in the positioning cavity 63. The weight of the bracket 20 and the part to be sprayed 40 itself provides force for the adhesive 30 to be bonded to the boss 41 and holds pressure for more than 10 seconds. The top of the spray masking rod 50 is inserted into the clearance position 65.

[0053] Step S104, Spraying: First, remove the positioning seat 60 from step S104. Then, fix the masking fixture containing the part to be sprayed 40 from step S104 onto the production line for spraying. Next, remove the spraying fixture containing the final product after spraying, remove the end cap 10 and the adhesive backing 30, and finally remove the sprayed product. After confirming that the spraying effect is OK, use CNC equipment or injection molding machine to process multiple fixing holes on a positioning seat 60 according to the order quantity and production capacity requirements. These fixing holes are the storage groove 61, positioning groove 62, positioning cavity 63, clearance hole 64, and clearance position 65. Multiple parts to be sprayed 40 can be masked on a single positioning seat 60 at one time, increasing production capacity for mass production.

[0054] In summary, the end cap 10 of this utility model is bonded to the protrusion 41 on the outer wall of the part to be sprayed 40 by adhesive 30, so as to perform masking treatment on the protrusion 41 during the spraying process. This replaces the traditional magnetic docking masking, cantilever cap masking, and sticker masking solutions, realizing partial masking of the part to be sprayed 40. The operation is simple and convenient. Moreover, the area of ​​the protrusion 41 is larger than the area of ​​the adhesive 30, so the end cap 10 with the adhesive 30 can be easily removed from the sprayed product. Compared with the sticker masking solution, since the adhesive 30 only plays an adhesive role, the adhesive 30 can be reused multiple times, more accurately and conveniently meeting the partial masking effect of different parts to be sprayed 40, thereby reducing the manufacturing cost of masking fixtures, improving spraying efficiency and production capacity, and is suitable for widespread promotion.

[0055] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A spray masking fixture, characterized in that, include: End cap; The bracket is used to support and fix the part to be sprayed; The adhesive backing has one end fixed to the end cap and the other end used to adhere to the protrusion on the outer wall of the part to be sprayed. The area of ​​the protrusion is larger than the area of ​​the adhesive backing. The end cap covers the adhesive backing and the protrusion to mask the protrusion during spraying.

2. The spray masking fixture according to claim 1, characterized in that, The bracket includes a support plate and a support column protruding from the bottom of the support plate. The support plate is provided with a receiving groove for fixing the part to be sprayed.

3. The spray masking fixture according to claim 2, characterized in that, The bracket is also provided with a storage cavity and a perforation. The storage cavity is recessed in the bottom wall of the receiving groove, and the perforation extends from the bottom wall of the storage cavity through the tray and the support column in sequence.

4. The spray masking fixture according to claim 3, characterized in that, The bracket also includes an annular support plate for abutting against the inner wall of the part to be sprayed. The annular support plate protrudes from the bottom wall of the receiving cavity and is correspondingly arranged with the end cap.

5. The spray masking fixture according to claim 4, characterized in that, The bracket also includes at least one support portion for abutting against the inner wall of the part to be sprayed, the support portion protruding from the inner wall of the receiving cavity and located beside the annular support plate.

6. The spray masking fixture according to claim 3, characterized in that, The bracket also includes two hooks for engaging with two blocks on the inner wall of the part to be sprayed, and both hooks protrude from the bottom wall of the receiving cavity.

7. The spray masking fixture according to claim 1, characterized in that, The end cap includes a cap body and a handle protruding from the cap body. The adhesive backing is fixed to the cap body, and the cap body can cover the adhesive backing and the protrusion.

8. The spray masking fixture according to claim 7, characterized in that, The cover is provided with a limiting groove and a recessed platform. The recessed platform is recessed on the inner wall of the limiting groove. The adhesive backing is bonded to the recessed platform. The protrusion can be accommodated in the limiting groove.

9. The spray masking fixture according to claim 1, characterized in that, The spray masking fixture also includes at least one spray masking rod, and the bracket is provided with at least one positioning hole. One end of the spray masking rod is used to be installed in the clip hole of the part to be sprayed, and the other end is inserted into the positioning hole.

10. A masking fixture, characterized in that, The device includes a positioning base and at least one masking fixture as described in any one of claims 1-9. The positioning base is provided with at least one receiving groove, at least one positioning groove, at least one positioning cavity, and at least one clearance hole. The positioning groove is located on the bottom wall of the receiving groove, the positioning cavity is located on the bottom wall of the positioning groove, and the clearance hole is located on the bottom wall of the positioning cavity. The part to be sprayed includes a base shell and a boss protruding from the outer wall of the base shell. When the part to be sprayed is pressed against the positioning base by the adhesive and the end cap, the bracket is inserted into the receiving groove, the base shell is fixed on the bracket and located in the positioning groove, the boss, the adhesive and a portion of the end cap are located in the positioning cavity, and the other portion of the end cap is located in the clearance hole.

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