Secondary injection molding magnetic sheet

Abstract

The utility model relates to the field of magnetic sheets, and discloses a secondary injection molding magnetic sheet, which comprises a half magnetic sheet frame and a shell, a groove is arranged at the center of each edge of the half magnetic sheet frame, and a long groove is arranged at the front end of the half magnetic sheet frame close to the inner side of the groove of each edge. Through holes are formed in the positions, close to all corners, of the front end of the half magnetic sheet frame, an inner reinforcing layer is arranged at the position, close to the inner side, of the interior of the half magnetic sheet frame in a penetrating mode, an inner rib ring is arranged at the center of the inner reinforcing layer in a penetrating mode, and corner holes are formed in the positions, close to all corners of the inner reinforcing layer, of the interior of the half magnetic sheet frame. According to the magnetic sheet, through the design of secondary injection molding and splicing of the two half magnetic sheet frames, the production difficulty is greatly reduced, the production efficiency is improved, the weight of the whole magnetic sheet is reduced as much as possible, the strength and the stability of the whole structure are further improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of magnetic tiles, in particular to a secondary injection molded magnetic tile. Background Art

[0002] Magnetic tiles are a kind of toys made of magnetic materials, which can attract and repel each other to form various shapes and structures. Magnetic tiles are usually made of plastic with magnets embedded inside, and can be used for the development of children's creativity and imagination.

[0003] Existing magnetic tiles usually adopt the method of one-time injection molding. The difficulty and cost of one-time injection molding are relatively high, and it is more difficult to implement. At the same time, the overall production process of producing a magnetic tile frame at one time is also relatively complex. In addition, when most existing magnetic tiles are injection molded, it is difficult to reduce the influence of temperature on the magnetism of the magnets, which will affect the normal use of the magnetic tiles. Moreover, after many magnetic tiles are lightened in weight, they cannot well guarantee their overall strength, and the service life will be seriously affected when impacted during use.

[0004] Therefore, those skilled in the art provide a secondary injection molded magnetic tile to solve the problems raised in the above background art. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a secondary injection molded magnetic tile. Through the design of secondary injection molding and the combination of two half magnetic tile frames, the production difficulty is greatly reduced, the production efficiency is improved, while the overall weight of the magnetic tile is reduced as much as possible, the strength and stability of the overall structure are further improved, and the service life is increased.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A secondary injection molded magnetic tile, comprising a half magnetic tile frame and a shell. Grooves are opened at the centers of each side of the half magnetic tile frame. Long grooves are opened at the inner sides of the grooves near each side at the front end of the half magnetic tile frame. Through holes are opened at the front end of the half magnetic tile frame near each corner. An inner strengthening layer is arranged through the inner side of the half magnetic tile frame. An inner rib ring is arranged through the center of the inner strengthening layer. Corner holes are opened at the corners of the half magnetic tile frame near the inner strengthening layer. Circular rib rings are arranged in a plurality of the corner holes. M-shaped rib rings are arranged among a plurality of the circular rib rings. A plurality of spherical fillers are filled in the plurality of M-shaped rib rings and circular rib rings. A corrosion-resistant layer is arranged on the outermost layer of the inside of the half magnetic tile frame. A heat-resistant layer is arranged on the inner side of the half magnetic tile frame near the corrosion-resistant layer;

[0007] On one side of the outer shell away from the inner strengthening layer, placement grooves are provided, and sleeves are arranged in multiple placement grooves. Magnets are arranged inside multiple sleeves, and heat insulation layers are arranged on one side of multiple sleeves close to the magnets;

[0008] Through the above technical solutions, in the entire production process, only the same semi-magnetic sheet frames need to be produced. Subsequently, only assembly is required, without directly producing the whole, which simplifies the production process. When the magnets are placed into the sleeves and the sleeves are placed into the placement grooves and then the first injection molding is carried out, the heat insulation layer can protect the magnets and reduce the adverse effects of temperature on their magnetism. By setting the long grooves, through holes and corner holes, the overall weight is reduced as much as possible, and lightweight is better achieved. By setting the corrosion-resistant layer, the safety of the magnetic sheet as a whole is enhanced. By setting the heat-resistant layer, the overall high-temperature resistance performance is improved. The circular rib rings and M-shaped rib rings arranged in the internal corner holes ensure the overall structural stability while reducing the overall mass, improving the strength, and the cooperation of the inner strengthening layer and the inner rib rings improves the overall impact resistance and anti-bending performance. By arranging spherical fillers inside the circular rib rings and M-shaped rib rings, the strength of the rib rings is further improved.

[0009] Furthermore, the two semi-magnetic sheet frames can be assembled by an adhesive, and the grooves on each side of the two semi-magnetic sheet frames can also be aligned correspondingly after assembly;

[0010] Through the above technical solutions, only the same semi-magnetic sheet frames need to be produced, and a whole magnetic sheet only needs to bond and assemble two identical semi-magnetic sheet frames, reducing the production difficulty and improving the production efficiency.

[0011] Furthermore, two semi-magnetic sheet frames to be assembled into one share the same inner strengthening layer;

[0012] Through the above technical solutions, the structure after assembly is more stable, and the inner strengthening layer can also make the connection between the two easier to align and less likely to have angular deviation.

[0013] Furthermore, after the two semi-magnetic sheet frames are assembled, the two grooves are also assembled, and the internal size after assembly is the same as the overall size of the outer shell, and the overall sizes of multiple sleeves are the same as the sizes of the placement grooves;

[0014] Through the above technical solutions, the outer shell can be placed in the assembled grooves, which is convenient for subsequent second injection molding.

[0015] Furthermore, the diameters of multiple magnets are the same as the sizes of the sleeves, the heat insulation layer is in direct contact with the magnets, and the material of the heat insulation layer is aluminosilicate fiber;

[0016] Through the above technical solution, the aluminosilicate fiber has the characteristics of high temperature resistance, low thermal conductivity, light bulk density, long service life, and high tensile strength. While protecting the magnet by fitting, it reduces the influence of its magnetism by temperature.

[0017] Furthermore, the materials used for the circular rib ring and the inner rib ring are polycarbonate, and the materials used for the multiple spherical fillers are carbon fiber;

[0018] Through the above technical solution, polycarbonate is a high-strength, impact-resistant, and high-temperature-resistant engineering plastic with good processing performance and cost-effectiveness. While achieving lightweight, it strengthens the strength and stability of the internal structure, and filling carbon fiber materials inside can further enhance the strength of the rib ring to ensure that the overall magnetic sheet will not be easily damaged.

[0019] Furthermore, the material used for the inner rib ring is ultra-high molecular weight polyethylene fiber;

[0020] Through the above technical solution, ultra-high molecular weight polyethylene fiber has outstanding impact resistance and cut resistance, which can reduce the possibility of the magnetic sheet breaking during use.

[0021] Furthermore, the material used for the corrosion-resistant layer is polypropylene, and the material used for the heat-resistant layer is ABS plastic;

[0022] Through the above technical solution, using polypropylene for the corrosion-resistant layer can reduce the influence of chemical substances and improve the safety of the outer surface. Having a heat-resistant layer made of ABS plastic inside further enhances the overall heat-resistant performance.

[0023] The present utility model has the following beneficial effects:

[0024] 1. A secondary injection-molded magnetic sheet proposed by the present utility model only needs to produce the same semi-magnetic sheet frame during production. The two magnetic sheet frames can be connected and assisted in alignment through the inner strengthening layer, and then obtained the finished magnetic sheet after being joined together with an adhesive. At the same time, the magnetic sheet adopts secondary injection molding, which greatly reduces the production difficulty and improves the production efficiency.

[0025] 2. A secondary injection-molded magnetic sheet proposed by the present utility model can avoid the magnet being affected by temperature and reducing its magnetism by designing a heat-insulating layer adjacent to the magnet, providing more protection for the magnet. When the overall joined magnetic sheet is provided with multiple grooves and holes to achieve lightweight, it is designed with a circular rib ring and an M-shaped rib ring to support the inside. The bending resistance and impact resistance are improved through the inner strengthening layer and the inner rib ring. The outer surface of the magnetic sheet is provided with a corrosion-resistant layer and a heat-resistant layer, which provides a guarantee for the long-term use of the magnetic sheet. The above design greatly improves the strength of the magnetic sheet and reduces the overall weight, making it easier to use. Description of the Drawings

[0026] Figure 1 Is a partially front - view axonometric schematic diagram of the unassembled present utility model;

[0027] Figure 2 Is a partially rear - view sectional axonometric schematic diagram of the assembled present utility model;

[0028] Figure 3 Is a partially rear - view sectional schematic diagram of the present utility model near the circular rib ring area;

[0029] Figure 4 Is a partially rear - view sectional schematic diagram of the present utility model near the inner rib ring area;

[0030] Figure 5 Is a partially rear - view sectional schematic diagram of the present utility model near the heat - resistant layer area;

[0031] Figure 6 Is a partially side - view sectional schematic diagram of the present utility model near the sleeve area;

[0032] Figure 7 Is a partially separated front - view axonometric schematic diagram of the present utility model near the housing area.

[0033] Legend description:

[0034] 1. Semi - magnetic sheet frame; 2. Inner strengthening layer; 3. Groove; 4. Housing; 5. Sleeve; 6. Through - hole; 7. Long slot; 8. Circular rib ring; 9. Spherical filling; 10. M - shaped rib ring; 11. Inner rib ring; 12. Corrosion - resistant layer; 13. Heat - resistant layer; 14. Corner hole; 15. Heat - insulating layer; 16. Placing groove; 17. Magnet. Specific implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] Refer to Figure 1-7 , an embodiment provided by the present utility model: A two - shot injection magnetic sheet includes a semi - magnetic sheet frame 1 and a housing 4. Grooves 3 are provided at the centers of each side of the semi - magnetic sheet frame 1. When two semi - magnetic sheet frames 1 are assembled, the grooves 3 thereon will also be correspondingly assembled. Long slots 7 are provided at the inner sides of the grooves 3 near each side at the front end of the semi - magnetic sheet frame 1, and through - holes 6 are provided near each corner at the front end of the semi - magnetic sheet frame 1. The long slots 7 and the through - holes 6 can also minimize the overall weight;

[0037] When the magnetic sheet is produced, the magnet 17 needs to be sleeved into the sleeve 5 first, and then the sleeve 5 is placed in the placement groove 16. This part is subjected to the first injection molding. After the first injection molding is completed, the whole is placed into the combined groove 3, and then the second injection molding is carried out. The second injection molding provides better protection for the magnet 17 and reduces the injection molding difficulty and cost.

[0038] An inner strengthening layer 2 is penetratedly arranged at the inner side near the inside of the semi-magnetic sheet frame 1. Each semi-magnetic sheet frame 1 does not contain the inner strengthening layer 2 inside when it is produced. The inner strengthening layer 2 is added later. When two identical semi-magnetic sheet frames 1 need to be aligned and combined, the same inner strengthening layer 2 can be set between the two semi-magnetic sheet frames 1 first, and then the connection is carried out. An inner rib ring 11 is penetratedly arranged at the center of the inner strengthening layer 2, and the inner rib ring 11 is annular.

[0039] Corner holes 14 are opened at the corners of the inner side of the semi-magnetic sheet frame 1 near the inner strengthening layer 2. Circular rib rings 8 are arranged in a plurality of corner holes 14, and M-shaped rib rings 10 are arranged among a plurality of circular rib rings 8. The circular rib rings 8 and the M-shaped rib rings 10 are cross-connected to provide support for the overall structure. A plurality of spherical fillers 9 are filled and arranged inside a plurality of M-shaped rib rings 10 and circular rib rings 8. A corrosion-resistant layer 12 is arranged on the outermost layer inside the semi-magnetic sheet frame 1. When the magnetic sheet is used as a whole, this layer can be used to avoid being affected by external chemical corrosion as much as possible. A heat-resistant layer 13 is arranged at the inner side near the corrosion-resistant layer 12 inside the semi-magnetic sheet frame 1. The arrangement of the heat-resistant layer 13 can prevent the whole magnetic sheet from degrading in a high-temperature environment.

[0040] Placement grooves 16 are opened on one side of the outer shell 4 away from the inner strengthening layer 2. Sleeves 5 are arranged in a plurality of placement grooves 16, magnets 17 are arranged inside a plurality of sleeves 5, and heat insulation layers 15 are arranged on one side of a plurality of sleeves 5 close to the magnets 17. When the magnet 17 is sleeved into the sleeve 5, the heat insulation layer 15 is in contact with the whole body of the magnet 17.

[0041] During the entire production process, only the same semi-magnetic sheet frame 1 needs to be produced. Subsequently, only assembly is required, and there is no need to directly produce the whole, which simplifies the production process. When the magnet 17 is placed into the sleeve 5 and the sleeve 5 is placed into the placement groove 16 for the first injection molding, the heat insulation layer 15 can protect the magnet 17, reducing the adverse effects of temperature on its magnetism. By setting the long groove 7, through hole 6, and corner hole 14, the overall weight is minimized as much as possible, better achieving lightweight. By setting the corrosion-resistant layer 12, the safety of the magnetic sheet as a whole is enhanced. By setting the heat-resistant layer 13, the overall high-temperature resistance performance is improved. The circular rib ring 8 and M-shaped rib ring 10 provided in the internal corner hole 14 ensure the overall structural stability while reducing the overall mass, improving the strength. The inner strengthening layer 2 and inner rib ring 11 cooperate to improve the overall impact resistance and anti-bending performance. By setting the spherical filling 9 inside the circular rib ring 8 and M-shaped rib ring 10, the strength of the rib ring is further enhanced;

[0042] The two semi-magnetic sheet frames 1 can be assembled by an adhesive. After assembly, the grooves 3 on each side of the two semi-magnetic sheet frames 1 can also be aligned correspondingly. Only the same semi-magnetic sheet frame 1 needs to be produced. A whole magnetic sheet only needs to bond and assemble two identical semi-magnetic sheet frames 1, reducing the production difficulty and improving the production efficiency. Before the two semi-magnetic sheet frames 1 are assembled and the inner strengthening layer 2 is not placed, there is a groove for placing the inner strengthening layer 2 inside them. The two semi-magnetic sheet frames 1 to be assembled share the same inner strengthening layer 2, making the assembled structure more stable. The inner strengthening layer 2 can also make their connection easier to align and less likely to have an angular deviation. After the two semi-magnetic sheet frames 1 are assembled, the two grooves 3 are also assembled. The internal dimensions after assembly are the same as the overall dimensions of the outer shell 4. The overall dimensions of multiple sleeves 5 are the same as the dimensions of the placement groove 16, enabling the outer shell 4 to be placed inside the assembled groove 3, facilitating the subsequent second injection molding;

[0043] The diameters of multiple magnets 17 are the same as the dimensions of the sleeve 5. The heat insulation layer 15 is in direct contact with the magnet 17. The heat insulation layer 15 is made of aluminosilicate fiber. Aluminosilicate fiber has the characteristics of low high-temperature thermal conductivity, light bulk density, long service life, and high tensile strength. While protecting the magnet 17 by bonding, it reduces the influence of temperature on its magnetism. The circular rib ring 8 and inner rib ring 11 are made of polycarbonate. Multiple spherical fillings 9 are made of carbon fiber. Polycarbonate is a high-strength, impact-resistant, and high-temperature-resistant engineering plastic with good processing performance and cost-effectiveness. While achieving lightweight, it enhances the strength and stability of the internal structure. Filling carbon fiber material inside can further improve the strength of the rib ring, ensuring that the overall magnetic sheet will not be easily damaged;

[0044] The material used for the inner rib ring 11 is ultra-high molecular weight polyethylene fiber, which has outstanding impact resistance and cut resistance, can reduce the possibility of the magnetic sheet breaking during use. The corrosion-resistant layer 12 is made of polypropylene, and the heat-resistant layer 13 is made of ABS plastic. Using polypropylene for the corrosion-resistant layer 12 can reduce the influence of chemical substances and improve the safety of the outer surface. The internal setting of ABS plastic further enhances the overall heat resistance performance;

[0045] Working principle: When the magnetic sheet is produced, only the semi-magnetic sheet frames 1 with the same batch can be produced, and then any two semi-magnetic sheet frames 1 are selected for splicing. Before splicing, the inner reinforcement layer 2 is inserted between the two semi-magnetic sheet frames 1. The inner reinforcement layer 2 can assist in alignment and prevent deviation. After splicing, the grooves 3 also correspond and are spliced. Due to the inner reinforcement layer 2, the internal rib ring 11 made of ultra-high molecular weight polyethylene fiber is provided in the overall magnetic sheet frame after splicing, greatly improving the bending and impact resistance performance. The provided long grooves 7, through holes 6 and corner holes 14 minimize the overall weight and better achieve lightweight. To prevent insufficient structural strength after reducing the weight, the circular rib ring 8 and M-shaped rib ring 10 provided in the corner holes 14 can play an internal support role. The material used is polycarbonate, which can strengthen the internal structural strength. The safety of the overall magnetic sheet is enhanced by setting the corrosion-resistant layer 12 made of polypropylene, and the overall high-temperature resistance performance is improved by using the heat-resistant layer 13 made of ABS plastic.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A secondary injection molded magnetic sheet, comprising a half magnetic sheet frame (1) and a housing (4), characterized in that: The semi-magnetic sheet frame (1) is provided with a groove (3) at the center of each side, the front end of the semi-magnetic sheet frame (1) is provided with a long groove (7) on the inner side of the groove (3) near each side, the front end of the semi-magnetic sheet frame (1) is provided with a through hole (6) near each corner, the semi-magnetic sheet frame (1) is provided with an inner reinforcement layer (2) penetrating the inner side, the inner reinforcement layer (2) is provided with an inner rib ring (11) penetrating the center, the semi-magnetic sheet frame (1) is provided with an inner reinforcement layer (2) near the inner reinforcement layer ( 2) are provided with corner holes (14) at each corner, a plurality of the corner holes (14) are provided with circular rib rings (8), a plurality of the circular rib rings (8) are provided with M-shaped rib rings (10) in the middle, a plurality of the M-shaped rib rings (10) and the circular rib rings (8) are filled with a plurality of spherical fillings (9), a corrosion-resistant layer (12) is provided on the outermost layer inside the semi-magnetic sheet frame (1), and a heat-resistant layer (13) is provided inside the semi-magnetic sheet frame (1) near the inner side of the corrosion-resistant layer (12); A placement groove (16) is provided on a side of the outer shell (4) away from the inner reinforcement layer (2), a plurality of the placement grooves (16) are provided with a sleeve (5), a plurality of the sleeves (5) are provided with a magnet (17) inside, and a heat insulation layer (15) is provided on a side of the plurality of sleeves (5) close to the magnet (17).

2. A secondary injection molded magnetic sheet according to claim 1, characterized in that: The two half-magnetic sheet frames (1) can be joined together by means of an adhesive, and after joining together, the grooves (3) on each side of the two half-magnetic sheet frames (1) can also be aligned accordingly.

3. A secondary injection molded magnetic sheet according to claim 1, characterized in that: Two semi-magnetic sheet frames (1) that need to be assembled into one body share the same inner reinforcement layer (2).

4. The secondary injection molded magnetic sheet according to claim 1, characterized in that: After the two semi-magnetic sheet frames (1) are assembled, the two grooves (3) are also assembled, and the internal dimensions after assembly are consistent with the circumferential dimensions of the outer shell (4), and the circumferential dimensions of the plurality of sleeves (5) are consistent with the dimensions of the placement slot (16).

5. The secondary injection molded magnetic sheet according to claim 1, characterized in that: The diameters of the plurality of magnets (17) are consistent with the size of the sleeve (5); the heat insulation layer (15) is in direct contact with the magnets (17); and the heat insulation layer (15) is made of aluminum silicate fiber.

6. The secondary injection molded magnetic sheet according to claim 1, characterized in that: The material used for the circular rib ring (8) and the inner rib ring (11) is polycarbonate, and the material used for the plurality of spherical fillers (9) is carbon fiber.

7. The secondary injection molded magnetic sheet according to claim 1, characterized in that: The material used for the inner rib ring (11) is ultra-high molecular weight polyethylene fiber.

8. The secondary injection molded magnetic sheet according to claim 1, characterized in that: The corrosion-resistant layer (12) is made of polypropylene, and the heat-resistant layer (13) is made of ABS plastic.

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