Shell spraying jig

Abstract

The utility model discloses a shell spraying jig which comprises a base, a plurality of tandem connection blocks, an upper cover plate and a self-locking screw rod. The bottom of the base is provided with a line body connector, the top face of the base is provided with a plurality of spraying material assembling and positioning columns, and a plurality of self-locking threaded holes are evenly distributed in the circumferential direction. A plurality of tandem blocks are sequentially arranged on the base in a stacked mode in the vertical direction, the upper cover plate covers the tandem block on the uppermost layer, and a partition wall perpendicular to the horizontal plane is arranged on the back face of each tandem block and used for separating spraying materials on the adjacent layers. And the self-locking screw rod is arranged on the upper cover plate, the plurality of serial connection blocks and the base in a penetrating manner, and is in threaded fit with the self-locking thread hole to form a self-locking structure. The spraying jig effectively solves the problems that a spraying jig is prone to deformation and large in paint overflowing area, the number of times of repeated use of the spraying jig is obviously increased, and the product yield is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to intelligent equipment manufacturing technical field especially is related to a casing spraying jig. BACKGROUND

[0002] Most of the mobile phone middle frame products on the market choose appearance spraying process for surface treatment, and the substrate needs to be clamped by a spraying jig and placed in a spraying line before being put on line. In order to improve the paint utilization rate of the spraying line, the mobile phone middle frame spraying jig adopts flat spraying design, and a stack of loading mode is used for each hanging jig.

[0003] Since the spraying jig needs to rotate in the spraying line to ensure the flow leveling effect of the sprayed paint, most of the spraying jigs are made of light plastic materials. However, the plastic spraying jig has poor strength and is prone to deformation during repeated use, which increases the overflow paint area of the product or thickens the paint on the overflow paint surface, thereby increasing the cost of laser engraving and removing the overflow paint surface and reducing the number of repeated use of the jig. SUMMARY

[0004] The utility model aims at providing a casing spraying jig to solve the technical problems of easy deformation, large overflow paint area and low repeated utilization rate of the spraying jig in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a casing spraying jig, comprising: a base, a plurality of stringing blocks, an upper cover plate and a self-locking screw;

[0006] The base is provided with a line body interface at the bottom and a plurality of spraying substrate assembly positioning columns on the top surface, and a plurality of self-locking screw thread holes are uniformly distributed in the circumferential direction;

[0007] A plurality of stringing blocks are sequentially stacked on the base in the vertical direction, and the upper cover plate is provided on the uppermost stringing block, the back surface of each stringing block is provided with a partition wall perpendicular to the horizontal plane for separating the adjacent layers of spraying substrates;

[0008] The self-locking screw is arranged in the upper cover plate, a plurality of stringing blocks and the base, and is threadedly connected with the self-locking screw thread hole to form a self-locking structure.

[0009] Optionally, the line body interface is provided with a plurality of positioning ribs uniformly distributed in the circumferential direction for assembly with the line body bolt.

[0010] Optionally, the base is provided with longitudinal and transverse intersecting support ribs between the spraying substrate assembly positioning columns, and the support ribs divide the surface of the base into a plurality of support areas.

[0011] Optionally, the back surface of each stringing block is provided with a through hole corresponding to the position of the self-locking screw thread hole of the base.

[0012] Optionally, a support structure is arranged between the material assembly positioning column on the back of the series connection block and the through hole, the height of the support structure is consistent with the height of the partition wall, and the support structure is used for preventing the series connection block from being deformed in the locked state.

[0013] Optionally, the self-locking screw rod comprises:

[0014] a screw rod body, wherein a threaded segment is arranged on the screw rod body, the thread pitch of the threaded segment is 3-5 mm, and the thread depth is 0.5-0.8 mm;

[0015] a handle arranged at the top end of the screw rod body.

[0016] Optionally, a locking through hole corresponding to the position of the self-locking thread hole of the base is arranged on the upper cover plate, a plurality of stop grooves are arranged on the inner wall of the locking through hole in the circumferential direction, and a stop strip matched with the stop grooves is arranged below the handle of the self-locking screw rod.

[0017] Optionally, the plurality of stop grooves are uniformly arranged along the inner wall of the locking through hole in the circumferential direction; and after the self-locking screw rod is rotated and locked, the stop strip and the stop grooves form at least two clamping matches.

[0018] Optionally, an inner thread matched with the threaded segment is arranged on the inner wall of the self-locking thread hole of the base, and the edge of the aperture of the self-locking thread hole is outwardly inclined to form a slope facilitating demolding.

[0019] Optionally, the base, the series connection block and the upper cover plate are integrally injection molded by a plastic material.

[0020] The scheme provided by the utility model solves the problems of easy deformation and uneven spraying of the existing spraying jig, and significantly improves the structural stability of the jig and the reliability of the spraying process.

[0021] Further, by arranging the positioning rib on the online body interface, increasing the support rib structure on the base, arranging the support structure at the through hole of the series connection block, and arranging the stop groove on the upper cover plate matched with the stop strip of the self-locking screw rod, the overall structural strength is improved, the reliable anti-loosening function is realized, the service life of the spraying jig is significantly prolonged, and the product yield is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a base structure schematic view in the embodiment of the utility model;

[0023] Figure 2 is a base cross section schematic view in the embodiment of the utility modelFigure One ;

[0024] Figure 3 is the base profile diagram of the embodiment of the utility model Figure Two ;

[0025] Figure 4 is the series connection block structure diagram of the embodiment of the utility model

[0026] Figure 5 is the upper cover plate local structure diagram of the embodiment of the utility model

[0027] Figure 6 is the self-locking screw structure diagram of the embodiment of the utility model

[0028] Figure 7 is the self-locking screw structure locking state diagram of the embodiment of the utility model

[0029] Figure 8 is the stop bar structure diagram of the embodiment of the utility model.

[0030] In the drawing, 1, line body interface;11, positioning rib;2, spraying material assembly positioning column;3, self-locking screw hole;4, support rib;51, partition wall;52, support structure;53, through hole;6, stop groove;71, screw body;72, handle;721, stop bar. DETAILED DESCRIPTION

[0031] The utility model scheme will be described below in conjunction with the schematic diagram, wherein the preferred embodiment of the utility model is shown, it should be understood that the person skilled in the art can modify the utility model described herein, and still realize the advantageous effect of the utility model. Therefore, the following description should be understood as the extensive knowledge of the person skilled in the art, and not as the limitation of the utility model.

[0032] The serial number of the component in this paper, for example, "first", "second" and the like, is only used to distinguish the described object, and has no any order or technical meaning. And the "connection", "coupling" of the present application includes direct and indirect connection (coupling) if not specially stated. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as the limitation of the utility model.

[0033] In the present utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0034] The utility model is described in more detail in the following paragraphs with reference to the drawings. The advantages and features of the utility model will be more apparent according to the following description. It should be noted that the drawings are all very simplified and all use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the utility model embodiments.

[0035] An embodiment of the utility model provides a shell spraying jig, please refer to Figures 1-4 , including base, a plurality of stringing blocks, upper cover plate and self-locking screw rod. The base bottom is equipped with line body interface 1, and the line body interface 1 is used to be inserted on line body rotating column. The top surface of the base is equipped with a plurality of spraying material assembly positioning columns 2, for positioning the placement of spraying material. The base is evenly distributed with a plurality of self-locking screw thread holes 3, and the overall locking can be realized by the cooperation of the self-locking screw rod and the screw thread holes.

[0036] In one specific example, an embodiment of the utility model provides a shell spraying jig for mobile phone middle frame surface spraying.

[0037] Specifically, the line body interface 1 is equipped with a plurality of circumferentially distributed positioning ribs 11 and line body bolt assemblies. The arrangement of the positioning rib 11 ensures that the base can be stably installed on the line body rotating column, realizing reliable rotating positioning.

[0038] It should be noted that in the present embodiment, the line body interface 1 refers to the structure at the bottom of the base for connecting with the spraying line body, which can be inserted into the rotating column of the spraying line body.

[0039] In one specific example, the line body interface 1 is equipped with four circumferentially distributed positioning ribs 11, and the positioning rib 11 cooperates with the line body bolt to form a stable rotating connection, ensuring that the spraying jig can rotate stably during the spraying process and guaranteeing the flow leveling effect of the sprayed paint.

[0040] The number of positioning ribs 11 can be selected within the range of 4-6 according to actual needs, and the preferred scheme in the present embodiment is to use four positioning ribs 11.

[0041] Further, the base is designed with full support ribs 4 on the spray material assembly surface, which are arranged in a crisscross manner to divide the surface of the base into multiple equidistant support areas. The overall strength of the base is significantly improved to prevent deformation during use.

[0042] Specifically, the height of the support ribs 4 is 2-3 mm, which can ensure sufficient strength without affecting the assembly of the material.

[0043] Further, multiple serial blocks are sequentially stacked on the base in the vertical direction. The back of each serial block is provided with a partition wall 51 perpendicular to the horizontal plane. The partition wall 51 is used for material partitioning of the serial block to ensure that the sprayed and oiled surface is fully exposed and to ensure stable oil flying amount on the non-oiled surface.

[0044] The height is controlled within the range of 3-5 mm, which can effectively prevent the overflow problem during spraying.

[0045] Further, the back of each serial block is provided with a through hole 53 corresponding to the position of the self-locking screw hole 3 of the base.

[0046] The support structure 52 is provided between the spray material assembly positioning column 2 on the back of the serial block and the through hole 53 of the self-locking screw rod, and the height of the support structure 52 is consistent with the height of the partition wall 51, which is used to avoid deformation of the serial block after locking, affecting the spraying quality.

[0047] Further, the self-locking screw rod includes a screw rod body 71 and a handle 72, and the handle 72 is arranged at the top end of the screw rod body 71. The thread pitch of the threaded section is 3-5 mm, and the thread depth is 0.5-0.8 mm.

[0048] The screw rod body 71 is provided with a threaded section, preferably, the thread pitch is 4 mm, the thread depth is 0.6 mm, and the thread length is not less than 15 turns, which ensures sufficient locking force.

[0049] In a specific example, the specific shape of the thread can be selected as a triangle, a trapezoid, etc. according to actual needs, which belongs to the usual means of those skilled in the art, and will not be described here.

[0050] Further, please refer to Figures 5-8 , the upper cover plate is arranged on the uppermost serial block, the upper cover plate is provided with a locking through hole corresponding to the position of the self-locking screw hole of the base, and a plurality of stop grooves 6 are arranged on the inner wall of the locking through hole in the circumferential direction. The handle 72 of the self-locking screw rod is provided below the stop groove 6. The cooperation of the stop groove 6 and the stop groove 721 forms an effective anti-loosening mechanism to ensure stable locking during spraying.

[0051] In one specific example, a plurality of said stop grooves 6 are evenly arranged along the inner wall of said locking through hole; after the rotation locking of said self-locking screw, said stop bar 721 and said stop groove 6 form at least two clamping fittings.

[0052] Further, the inner wall of the self-locking thread hole 3 of the base is provided with an inner thread matched with the threaded section, and the edge of the aperture of the self-locking thread hole 3 is outwardly inclined to form a slope facilitating demolding.

[0053] Further, the base, the stringing block and the upper cover plate are integrally injection molded by using plastic material.

[0054] Preferably, the enhanced PC / ABS material is used, and the heat distortion temperature of the material is not less than 120 DEG C, so as to meet the temperature requirement of the spraying process.

[0055] In the embodiment of the utility model, the reuse frequency of the spraying jig can be increased from the conventional 2-3 times to 4-5 times; the stacking quantity of the spraying jig is increased from 6PCS / hang to 20PCS / hang, the paint utilization rate is increased by 230% on the basis of the original, the spraying process capacity is increased by 230%, the production efficiency is significantly improved, the product overflow paint defect rate is reduced to less than 0.5%, and the laser carving cost is reduced.

[0056] Further, the specific use method of the shell spraying jig provided by the embodiment comprises the following steps:

[0057] S1: the spraying material is loaded into the base, and the material is accurately positioned with the spraying material assembly positioning column 2;

[0058] S2: the stringing block and the spraying material are stacked in sequence, and the partition wall 51 of each layer of the stringing block is accurately positioned with the material, until the predetermined number is filled.

[0059] Among them, the adjacent spraying materials are kept apart by 3-5mm through the partition wall 51 of the stringing block;

[0060] S3: the upper cover plate is arranged on the uppermost layer of the stringing block, and the position of the stop groove 6 is accurately ensured;

[0061] S4: the self-locking screw is sequentially inserted from top to bottom, the handle 72 is used to tighten the screw, and the stop bar 721 is completely engaged with the stop groove 6.

[0062] In conclusion, the utility model discloses embodiment through the design of screw thread locking and anti -loose double -protection mechanism, effectively solved the problem that traditional spraying jig is easy to loosen, specifically adopt the precision cooperation of screw thread and base screw hole and adopt the interlocking design of lock post anti -loose stop bar and upper cover stop groove, further, the production efficiency and quality are improved significantly, and the cost is reduced. In addition, the optimized structure ensures the product stability, and the base full -face support rib design enhances the overall strength, and the series connection block increases the partition wall and ensures the uniform spraying, and the precise thread cooperation guarantees the locking reliable, and the optimization selection of material and technology prolongs the service life.

[0063] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the utility model claims and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A shell spraying fixture, characterized in that, include: Base, multiple connecting blocks, top cover plate and self-locking screw; The base has a wire interface at the bottom and several spray material assembly positioning posts on the top surface, and multiple self-locking screw holes are evenly distributed around the perimeter. Multiple connecting blocks are stacked vertically on the base, and the upper cover plate is placed on the topmost connecting block. Each connecting block has a partition wall perpendicular to the horizontal plane on its back side to separate the spraying material of adjacent layers. The self-locking screw passes through the upper cover plate, multiple connecting blocks and the base, and engages with the self-locking screw thread hole to form a self-locking structure.

2. The shell spraying fixture according to claim 1, characterized in that, The line interface is provided with multiple circumferentially distributed positioning ribs for assembly with the line pin.

3. The shell spraying fixture according to claim 1, characterized in that, The base is provided with crisscrossing support ribs between the positioning columns of the sprayed material assembly, and the support ribs divide the surface of the base into multiple support areas.

4. The shell spraying fixture according to claim 1, characterized in that, Each of the serial blocks has a through hole on its back side that corresponds to the position of the self-locking screw hole of the base.

5. The housing spraying fixture according to claim 4, characterized in that, A support structure is provided between the spray material assembly positioning post on the back of the connecting block and the through hole. The height of the support structure is the same as the height of the partition wall, which is used to prevent the connecting block from deforming in the locked state.

6. The housing spraying fixture according to claim 1, characterized in that, The self-locking screw includes: The screw body has a threaded section with a thread pitch of 3-5 mm and a thread depth of 0.5-0.8 mm. A handle is located at the top of the screw body.

7. The housing spraying fixture according to claim 6, characterized in that, The upper cover plate is provided with a locking through hole corresponding to the position of the self-locking screw hole of the base. The inner wall of the locking through hole is provided with a plurality of stop grooves along the circumferential direction. A stop strip that cooperates with the stop groove is provided below the handle of the self-locking screw.

8. The housing spraying fixture according to claim 7, characterized in that, The plurality of stop grooves are evenly arranged circumferentially along the inner wall of the locking through hole; after the self-locking screw is rotated and locked, the stop strip and the stop groove form at least two locking engagements.

9. The housing spraying fixture according to claim 6, characterized in that, The inner wall of the self-locking threaded hole of the base is provided with an internal thread that mates with the threaded section, and the edge of the opening of the self-locking threaded hole is inclined outward to form a slope that facilitates demolding.

10. The housing spraying fixture according to claim 1, characterized in that, The base, connecting block, and top cover are all integrally injection molded from plastic.

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