Tool jig for silk-screen printing

Abstract

The utility model discloses a tool jig for silk-screen printing, which comprises a supporting seat, two adjacent sides of the upper surface of the supporting seat are provided with two positioning strips connected with each other, and the bottom of the supporting seat is hollow; the bearing jig abuts against the supporting base through the positioning strip, and a limiting assembly is arranged on the upper surface of the bearing jig. The suction force providing part is detachably embedded in the hollow part of the supporting seat, and the distance between the upper surface of the suction force providing part and the upper surface of the hollow part of the supporting seat is adjustable; the attraction providing part comprises a magnet array, an iron plate and a gasket; according to the utility model, a product on the bearing jig is magnetically attracted through the detachable attraction force providing part, so that the product is ensured not to be adhered by a screen printing plate in the printing process; the requirements of different products can be met by adjusting the distance between the magnet array and the product through the gasket, meanwhile, the magnet array, the iron plate and the gasket are detachable, and the universality for the products of different specifications is high.

Description

Technical Field

[0001] The utility model relates to a jig, in particular to a tooling jig for grain boundary diffusion typesetting. Background Art

[0002] The research and application of grain boundary diffusion technology to improve magnet performance is becoming increasingly mature. Using various technologies to form a core-shell microstructure and enrich the composition of the grain boundary phase to improve the magnet performance of the matrix layer, thereby improving the performance of sintered NdFeB magnets, has become an important way and mainstream method for rare earth permanent magnet companies to improve quality and reduce costs in producing high-performance rare earth NdFeB permanent magnets. Currently, the mainstream process for grain boundary diffusion technology in the industry is screen printing.

[0003] The screen printing process features high production efficiency, high utilization of heavy rare earth elements, and good weight gain consistency, making it ideal for grain boundary diffusion of square and round magnets. Currently, the commonly used support fixture for grain boundary diffusion via screen printing is an air suction method, requiring appropriate air suction holes to be opened at the bottom of the fixture based on product specifications. Products of different sizes and weight gain ratios typically require corresponding screen printing plates and fixtures, resulting in poor versatility. Furthermore, different fixtures must be produced for products of different specifications, and frequent replacement of screens and fixtures reduces efficiency, increases costs, and reduces flexibility.

[0004] Patent CN220031440U provides a magnetic fixture for fixing products. This solves the fixture universality problem to a certain extent, but this solution has several product defects:

[0005] 1. Since the product is in contact with the flexible NdFeB magnet, the printed result is difficult to separate from the flexible NdFeB magnet, which has a great impact on the subsequent flipping operation;

[0006] 2. Due to the weak suction force of flexible NdFeB, it cannot effectively adsorb small products;

[0007] 3. After screen printing, the product needs to be dried at high temperature (120-150°C). During the drying process, the product and the flexible NdFeB magnet cannot be separated. Due to the limited heat resistance of the flexible NdFeB magnet, the suction fixture will fail after a certain period of use, resulting in significant waste. Utility Model Content

[0008] The utility model aims to overcome the deficiencies of the prior art and provide a tooling fixture for screen printing, which has good versatility, low cost and flexible use.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a tooling fixture for screen printing, comprising:

[0010] A support base, wherein two adjacent sides of the upper surface of the support base are provided with two connected positioning strips, and the bottom of the support base is hollow;

[0011] A carrying jig is mounted on the support seat via the two positioning bars, and a limiting component for limiting the product is provided on the upper surface of the carrying jig;

[0012] A suction providing portion is detachably embedded in the hollow of the support base, for adsorbing the product on the supporting fixture, and the distance between the upper surface of the suction providing portion and the upper surface of the hollow of the support base is adjustable;

[0013] Wherein, the suction force providing part includes a magnet array, an iron plate and a gasket; the magnet array is adsorbed on the iron plate, the iron plate is arranged on the gasket, and the gasket is arranged at the bottom of the hollow.

[0014] Furthermore, the limiting assembly includes limiting strips arranged along three adjacent sides of the supporting fixture, and a side of the supporting fixture without the limiting strip is arranged corresponding to any one of the positioning strips.

[0015] Furthermore, the hollow area of the bottom of the support base is smaller than the area of the upper surface of the support base.

[0016] Furthermore, the support seat, the bearing fixture and the gasket are all made of bakelite or aluminum plate.

[0017] Furthermore, the thickness of the iron sheet is 1-2 mm.

[0018] Furthermore, the thickness of the magnet array is 2-6 mm.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] The tooling jig for screen printing of the present invention magnetically attracts the product on the supporting jig through a detachable suction providing part embedded in the hollow area of the support seat, ensuring that the product will not be adhered to the screen plate during the printing process. At the same time, the product on the supporting jig can be conveniently separated from the support seat, and the suction size of products of different specifications can be adjusted by adjusting the distance between the upper surface of the suction providing part and the hollow upper surface of the support seat, ensuring that the force state of the products is consistent, with good versatility and low cost.

[0021] Secondly, the magnet array, iron plate and gasket in the suction providing part are detachable and can be freely combined. They are highly versatile and applicable to products of different specifications. In particular, due to the flexibility of the fixture, they have higher production efficiency for the production mode of small batch and multi-specification products.

[0022] In addition, the suction providing part is fixed on the support base. After the screen printing is completed, it is more convenient to separate the supporting jig from the support base, which is convenient for subsequent drying and turning operations. At the same time, since the suction providing part does not need to be dried together with the supporting jig, the failure of the suction jig is avoided, and it can be used for a long time, avoiding the waste of the suction jig and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model;

[0025] Figure 2 This is a structural diagram of a carrying fixture in one embodiment of the present utility model;

[0026] Figure 3 This is a structural diagram of a suction force providing portion in one embodiment of the present invention;

[0027] Among them: 1. Support seat; 2. Load-bearing fixture; 3. Limiting component; 4. Suction providing part; 11. Positioning bar; 30. Limiting bar; 40. Magnet array; 41. Iron plate; 42. Gasket. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] The utility model provides a tooling jig for screen printing, which solves the problems in the prior art that the jig adopts air suction to adsorb products, has poor versatility, low production efficiency and high cost.

[0030] For ease of understanding, the specific process in the embodiment of this application is described below. Figures 1 to 3In an embodiment of the present application, a tooling jig for screen printing includes a support base 1, a carrying jig 2, a limiting assembly 3, and a suction providing portion 4. Two adjacent positioning bars 11 are provided on the upper surface of the support base 1, and the two positioning bars 11 are arranged in an L shape. The bottom of the support base 1 is hollowed out. The carrying jig 2 is supported on the upper surface of the support base 1 via the two positioning bars 11. The upper surface of the carrying jig 2 is provided with a limiting assembly 3 for limiting the position of the product. The suction providing portion 4 is detachably embedded in the hollow area of the support base 1 to absorb the product located on the carrying jig 2, and the distance between the upper surface of the suction providing portion 4 and the hollow upper surface of the support base 1 is adjustable.

[0031] The tooling jig for screen printing of the present invention adsorbs the product located on the supporting jig 2 by means of the suction providing part 4 embedded in the hollow area of the support seat 1, and adjusts the suction size of products of different specifications by adjusting the distance between the upper surface of the suction providing part 4 and the hollow upper surface of the support seat 1, thereby ensuring that the force state of the products is consistent, with good versatility and low cost.

[0032] based on Figure 3 The suction force providing part 4 includes a magnet array 40, an iron plate 41, and a gasket 42; the magnet array 40 is adsorbed on the iron plate 41, the iron plate 41 is arranged on the gasket 42, and the gasket 42 is arranged on the hollow lower surface of the bottom of the support seat 1. In this way, the suction force providing part 4 composed of the magnet array 40, the iron plate 41 and the gasket 42 is embedded in the hollow area of the support seat 1, with the gasket 42 located at the bottom and the magnet array 40 located at the top. When working, the magnet array 40 provides stable suction for the adsorption and fixation of the product, and the iron plate 41 provides a stable attachment position for the magnet array 40, while also playing the role of magnetic force enhancement. In this way, the magnet array 40 can adsorb the product located on the supporting fixture 2 across the support seat 1.

[0033] At the same time, the suction providing part 4 is detachably arranged in the hollow area of the support base 1, and the suction providing part 4 composed of the magnet array 40, the iron plate 41 and the gasket 42 is also easy to separate, so it is easy to disassemble, so that it can be applied to different products and has a wide audience.

[0034] Among them, the upper surface of the magnet array 40 and the hollow upper surface of the support base 1 can be tightly connected or there can be a distance between them, and this distance is determined by adjusting the thickness of the gasket 41. The closer the magnet array 40 is to the hollow upper surface, the closer it is to the product, thereby enhancing the magnetic force that adsorbs the product. In this way, the suction force of the magnet array 40 on the product can be adjusted by adjusting the thickness of the gasket 41 to meet the needs of products of different specifications.

[0035] Specifically, by calculating the suction force of different magnet arrays 40 on products at different distances through finite element analysis, a targeted fixed combination of products can be designed to ensure that the force states of different products are consistent.

[0036] Finite element calculations are used to calculate the thickness of each mechanism corresponding to products of different thicknesses, as shown in the following table:

[0037]

[0038] Furthermore, the limiting component 3 includes limiting bars 30 arranged along three adjacent sides of the supporting fixture 2, and the side of the supporting fixture 2 without the limiting bar 30 is arranged corresponding to any one of the positioning bars 11, so that the product can be limited between the limiting bar 30 and the positioning bar 11, and the position of the product can be preliminarily positioned.

[0039] Furthermore, the hollow area at the bottom of the support base 1 is smaller than the area of the upper surface of the support base 1 , so that the upper surface of the support base 1 can have a greater bearing capacity.

[0040] Furthermore, the support seat 1, the bearing fixture 2 and the gasket 42 are all made of bakelite or aluminum plate. Bakelite is a thermosetting phenolic plastic product obtained by heating and pressing bakelite powder in a mold, and the aluminum plate is formed by sheet metal processing and surface spraying.

[0041] Furthermore, in this embodiment, the thickness of the iron sheet 42 is 1-2 mm, and the thickness of the magnet array 40 is 2-6 mm. The above thicknesses can be adjusted according to actual needs to ensure that the stress states of various parts of the product are consistent.

[0042] When in use: first place the support base 1 on the machine, then place the corresponding suction providing part 4 into the hollow area at the bottom of the support base 1 according to the product requirements, and then position the supporting fixture 2 with the product on the upper surface of the support base 1 through two positioning bars, and the suction providing part 4 provides adsorption force for the product, so that the product can be fixed, and the force state of the product is consistent, and then printing and other operations can be carried out.

[0043] An example is given below to illustrate the entire process.

[0044] Example 1

[0045] 1. First confirm the magnet size is 20*10*0.8mm;

[0046] 2. Select a magnet array 40 with a thickness of 5 mm, an iron plate 41 with a thickness of 2 mm, a gasket 42 with a thickness of 4 mm, and a support fixture 2 with a thickness of 4 mm. Assemble the magnet array 40, iron plate 41, and gasket 42 to form the suction force providing portion 2.

[0047] 3. After the blank is cut and ground into 20*10*0.8 magnets, it is loaded on the vibration plate and neatly arranged on the corresponding supporting fixture 2 by the automatic material sorting machine;

[0048] 4. Place the support base 1 on the machine table first;

[0049] 5. Then, according to the needs of the 20*10*0.8 product, the corresponding suction providing part 2 is placed into the hollow part of the support base 1, where the 5mm magnet array 40 is arranged in advance on the iron plate 41.

[0050] 6. Then place the supporting fixture 2 with the product on the upper surface of the support base 1, and position the two sides through the positioning strips 30 to complete the fixation of the product, and then carry out printing and other operations.

[0051] 7. After completing the printing and other operation steps, the supporting jig 2 with the product can be separated from the support base 1, so that the supporting jig 2 with the product can be conveniently dried and other operations can be performed. Moreover, since the suction providing part does not need to be dried together with the supporting jig 2, the failure and waste of the suction jig is avoided, the production cost is reduced, and it can be used for a long time.

[0052] The utility model provides a tooling jig for screen printing, and the printing process is not restricted by the tooling, the tooling has strong versatility, can greatly improve the processing efficiency, and meets actual use requirements.

[0053] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tooling fixture for screen printing, characterized in that: include: A support base, wherein two adjacent sides of the upper surface of the support base are provided with two connected positioning strips, and the bottom of the support base is hollow; A carrying jig is mounted on the support seat via the two positioning bars, and a limiting component for limiting the product is provided on the upper surface of the carrying jig; A suction providing portion is detachably embedded in the hollow of the support base, for adsorbing the product on the supporting fixture, and the distance between the upper surface of the suction providing portion and the upper surface of the hollow of the support base is adjustable; Wherein, the suction force providing part includes a magnet array, an iron plate and a gasket; the magnet array is adsorbed on the iron plate, the iron plate is arranged on the gasket, and the gasket is arranged at the bottom of the hollow.

2. The tooling fixture for screen printing according to claim 1, characterized in that: The limiting assembly includes limiting strips arranged along three adjacent sides of the carrying jig, and a side of the carrying jig without the limiting strips is arranged corresponding to any one of the positioning strips.

3. The tooling fixture for screen printing according to claim 1, characterized in that: The hollow area of the bottom of the support base is smaller than the area of the upper surface of the support base.

4. The tooling fixture for screen printing according to claim 1, characterized in that: The support seat, the bearing fixture and the gasket are all made of bakelite or aluminum plate.

5. The tooling fixture for screen printing according to claim 1, characterized in that: The thickness of the iron sheet is 1-2 mm.

6. The tooling fixture for screen printing according to claim 1, characterized in that: The thickness of the magnet array is 2-6 mm.

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