Screw through hole pressure limiting sleeve structure of injection molding part

Abstract

The utility model relates to the technical field of screw through hole pressure limiting sleeve structures, in particular to a screw through hole pressure limiting sleeve structure of an injection molding part. According to the technical scheme, the pressure limiting device is installed in a screw through hole in an injection molding plate and comprises a pressure limiting sleeve part, the pressure limiting sleeve part comprises a pressure limiting sleeve, and a plurality of fiber needles are embedded in the pressure limiting sleeve and used for enhancing the elastic modulus of the pressure limiting sleeve; and the pressure limiting sleeve is embedded in the screw through hole. The pressure limiting sleeve piece is arranged in the screw through hole, and compared with traditional aluminum alloy or steel, the weight of the whole pressure limiting sleeve piece is reduced due to the arrangement of the pressure limiting sleeve and the fiber needle, and energy consumption is reduced; the arrangement of the pressure limiting sleeve is beneficial to recovery of the injection molding part, the pressure limiting sleeve and the injection molding plate can adopt consistent resin, direct crushing and recovery can be realized, the injection molding part adopting the metal pressure limiting sleeve cannot be directly crushed and recovered, and the design of the application is environment-friendly and practical.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of screw via pressure limiting sleeve structures, and particularly relates to a screw via pressure limiting sleeve structure of an injection molded part. BACKGROUND

[0002] Engineering plastics are continuously improved in mechanical properties, heat resistance, durability, corrosion resistance and the like, and are used to replace some application scenarios with high performance requirements, such as automobiles, aerospace, industrial automation and the like, and are used as main stress structures of products. However, compared with metal materials, the plastic anti-creep performance is poor, especially at the screw fastening position. In order to prevent loosening after screw fastening, engineers usually embed a metal ring at the screw via. When the screw is fastened, the main pre-tightening force is borne by the metal ring to prevent stress relaxation of the plastic and screw loosening. The pressure limiting sleeves currently used on the market are all metal materials (aluminum alloy, steel, copper alloy, etc.).

[0003] The metal material pressure limiting sleeve is heavy and has high cost, and is not conducive to direct crushing and recycling of the subsequent injection molded part, and long-term consideration still has certain disadvantages. Therefore, the application provides a screw via pressure limiting sleeve structure of an injection molded part. CONTENT OF THE UTILITY MODEL

[0004] The application aims at the technical problems in the background art, and provides a screw via pressure limiting sleeve structure of an injection molded part.

[0005] The technical scheme of the application is a screw via pressure limiting sleeve structure of an injection molded part, which is installed in a screw via on an injection molded plate and comprises a pressure limiting sleeve part. The pressure limiting sleeve part comprises a pressure limiting sleeve, and a plurality of fiber needles are embedded in the pressure limiting sleeve to enhance the elastic modulus of the pressure limiting sleeve.

[0006] The pressure limiting sleeve is embedded in the screw via.

[0007] Preferably, the pressure limiting sleeve is axially provided with a plurality of needle holes penetrating the two end faces thereof, and the plurality of fiber needles are respectively fixedly embedded in the plurality of needle holes.

[0008] Preferably, the two ends of the fiber needle respectively extend to the two end portions of the needle hole.

[0009] Preferably, the outer end of the pressure limiting sleeve is recessed in the interior of the screw via, and the outer end of the pressure limiting sleeve and the outer end portion of the screw via form a screw cap accommodating cavity.

[0010] Preferably, the fiber needle is a glass fiber, a carbon fiber or a basalt fiber.

[0011] Compared with the prior art, the application has the following beneficial technical effects:

[0012] The application sets a pressure limiting sleeve in the screw via hole, wherein the setting of the pressure limiting sleeve and the fiber needle reduces the weight of the whole pressure limiting sleeve, reduces energy consumption, and also reduces cost compared with traditional aluminum alloy or steel;

[0013] The setting of the pressure limiting sleeve in the application is beneficial to recycling of the injection molding part, since the pressure limiting sleeve and the injection molding plate can adopt consistent resin, direct crushing recycling can be realized, while the injection molding part adopting a metal pressure limiting sleeve cannot be directly crushed and recycled, the design of the application is environmentally friendly and practical;

[0014] The setting of the fiber needle in the application has higher anti-creep performance, adopts glass fiber, carbon fiber and the like with low cost, and has excellent physical properties of high strength and high modulus, thereby ensuring the stability of the screw via hole. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of a structure of a pressure limiting sleeve of a screw via hole of an injection molding part;

[0016] Figure 2 is Figure 1 a distribution structure diagram of the fiber needle in the application;

[0017] Figure 3 is a schematic diagram of the installation structure of the pressure limiting sleeve structure of the injection molding part screw via hole in the application;

[0018] Figure 4 is Figure 3 a bottom structure schematic diagram of

[0019] Reference signs: 1, injection molding plate; 2, screw via hole; 3, pressure limiting sleeve; 31, pressure limiting sleeve; 32, needle hole; 33, fiber needle. DETAILED DESCRIPTION

[0020] The technical solutions of the application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] The components of the embodiments of the application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application.

[0022] Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the application.

[0023] In the description of the present application, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment

[0026] As Figures 1-4 shown, the injection molding part screw via pressure limiting sleeve structure proposed by the present application is installed in the screw via 2 on the injection molding plate 1, which includes a pressure limiting sleeve 3, and the pressure limiting sleeve 3 includes a pressure limiting sleeve 31. It should be noted that the shape of the pressure limiting sleeve 31 is preferably circular or elliptical, and the specific shape is not limited here. A plurality of fiber needles 33 are embedded in the pressure limiting sleeve 31 for enhancing the elastic modulus of the pressure limiting sleeve 31; the fiber needle 33 is glass fiber or carbon fiber or basalt fiber.

[0027] Specifically, the pressure limiting sleeve 31 is embedded in the screw via 2. The pressure limiting sleeve 31 is an annular high polymer composite pressure limiting sleeve made of resin, and its main components include but are not limited to polyurethane, epoxy resin, aliphatic nylon, semi-aromatic nylon, polyethylene terephthalate PET, polybutylene terephthalate, polyketone imine, polypropylene, polystyrene.

[0028] The pressure limiting sleeve 31 is axially provided with a plurality of through holes 32 at both ends of the pressure limiting sleeve 31, and a plurality of fiber needles 33 are respectively fixedly arranged in the plurality of through holes 32. Both ends of the fiber needle 33 extend to both ends of the through hole 32. The axial length of the fiber needle 33 is controlled in the range of 90-101% of the pressure limiting sleeve 31, and the optimal axial length is equal to the length of the pressure limiting sleeve 31. When the angle of the fiber needle 33 is 0-10° with respect to the axial direction of the screw installation direction of the pressure limiting sleeve 31, the pressure limiting sleeve 31 has high pressure limiting strength; when the angle of the fiber needle 33 is 10-90° with respect to the axial direction of the screw installation direction of the pressure limiting sleeve 31, the pressure limiting strength of the pressure limiting sleeve 31 is general. The volume proportion of the continuous fiber needle 33 in the pressure limiting sleeve 31 is 30-90%, and the diameter of the fiber needle 33 is 3.0-100 μm.

[0029] The angle of the fiber needle 33 can be mixed or single, for example, high pre-tightening force is actually needed and there is a ring-shaped pressure / tension, 45° angle distribution is adopted for 10% fiber needle 33 proportion arrangement, and 0° angle distribution is combined with 90% fiber proportion for joint design and use.

[0030] The following table is the relationship between the physical performance elastic modulus of the fiber needle 33 (glass fiber is adopted) with different angles and 5 μm diameter and the pressure limiting sleeve 31. Low glass fiber content can achieve high performance elastic modulus, and high proportion of glass fiber elastic modulus can approach the performance of aluminum alloy material.

[0031] Glass fiber proportion volume percentage, unit: % Fiber to axial angle unit: degree Elastic modulus unit: MPa 50 0 37325 50 10 16485 80 0 49602 80 10 20163 85 0 47738 85 10 16384

[0032] The outer end of the pressure limiting sleeve 31 is recessed in the inside of the screw through hole 2, and the outer end of the pressure limiting sleeve 31 and the outer end of the screw through hole 2 form a screw cap accommodating cavity.

[0033] In summary, the pressure limiting sleeve 3 is arranged in the screw through hole 2, wherein the arrangement of the pressure limiting sleeve 31 and the fiber needle 33 reduces the weight of the whole pressure limiting sleeve 3 compared with the traditional aluminum alloy or steel material, and reduces the energy consumption. The arrangement of the pressure limiting sleeve 3 is beneficial to the recycling of the injection molding part. Since the pressure limiting sleeve 31 and the injection molding plate 1 can adopt the same resin, direct crushing recycling can be achieved. The injection molding part using a metal pressure limiting sleeve cannot be directly crushed and recycled. The design of the present application is environmentally friendly and practical. The arrangement of the fiber needle 33 has higher anti-creeper performance. The cost of glass fiber and carbon fiber is low, and the excellent physical properties of high strength and high modulus are guaranteed, thereby ensuring the stability of the screw through hole installation connection.

[0034] The above specific embodiments are only preferred embodiments of the present application. Based on the technical solutions of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments; the above specific embodiments are only an explanation of the present application, and are not a limitation of the present application.

Claims

1. A screw through-hole pressure limiting sleeve structure for injection molded parts, installed in the screw through-hole (2) on the injection molding plate (1), characterized in that, include: Pressure limiting kit (3), the pressure limiting kit (3) includes a pressure limiting sleeve (31), the pressure limiting sleeve (31) is embedded with a plurality of fiber needles (33) for enhancing the elastic modulus of the pressure limiting sleeve (31); The pressure limiting sleeve (31) is embedded in the screw through hole (2).

2. The pressure-limiting sleeve structure for screw holes in injection molded parts according to claim 1, characterized in that, The pressure limiting sleeve (31) has a number of through-holes (32) on both ends of its axial direction, and a number of fiber needles (33) are fixedly embedded in the number of through-holes (32).

3. The pressure-limiting sleeve structure for screw holes in injection molded parts according to claim 2, characterized in that, The two ends of the fiber needle (33) extend to the two ends of the needle hole (32).

4. The pressure-limiting sleeve structure for screw holes in injection molded parts according to claim 1, characterized in that, The outer end of the pressure limiting sleeve (31) is recessed inside the screw through hole (2), and the outer end of the pressure limiting sleeve (31) and the outer end of the screw through hole (2) form a screw cap receiving cavity.

5. The pressure-limiting sleeve structure for screw holes in injection molded parts according to claim 4, characterized in that, The fiber needle (33) is glass fiber, carbon fiber, or basalt fiber; The pressure limiting sleeve (31) is a resin pressure limiting sleeve.

Images