A nylon-reinforced cement nail mold and cement nail

Abstract

This utility model discloses a nylon-reinforced cement nail mold and cement nail, relating to the field of injection molding technology. The mold includes a lower mold and an upper mold: the lower mold has nail tip positioning holes to fix the nail tip, and the upper mold has a nail head positioning groove on the top. After the mold is closed, an annular cavity and a recessed cavity are formed. Nylon material is synchronously filled through an integrated flow channel, forming a mechanical interlocking structure. The four corner guide pillars and guide sleeves of the mold adopt a conical fit for self-alignment. The ejection mechanism of the lower mold pushes the nail tip through a conical ejector pin. The bottom of the annular cavity and the side wall of the recessed cavity are provided with multi-stage injection channels, with micropores distributed radially and spirally to uniformly fill the material. The pressure plate of the upper mold presses the nail head through hinges and elastic fasteners. The product produced using this utility model has both high strength and impact toughness, effectively improving fastening and seismic performance, solving the problems of easy falling off and insufficient strength of traditional cement nails. It is suitable for the field of building decoration and has the advantages of compact structure and stable performance.

Description

Technical Field

[0001] This utility model relates to the field of building fastener manufacturing technology, and more specifically to a nylon-reinforced cement nail mold and cement nails made therefrom. Background Technology

[0002] In construction and decoration, cement nails are commonly used fasteners. While traditional steel cement nails possess a certain strength, they suffer from issues such as insufficient bonding to the fixed object and poor vibration resistance, especially in applications requiring high fastening strength. To address these problems, designs incorporating nylon reinforcement structures into steel cement nails have emerged. This integration of nylon material with the steel nail body enhances the overall performance of the cement nail. However, existing molds for molding these nylon-reinforced cement nails have structural design shortcomings. For example, they struggle to precisely mold the nylon material to specific areas of the steel nail body, resulting in insufficient bonding strength between the molded nylon structure and the steel nail body. Furthermore, the mold's closing accuracy and production efficiency need improvement. Therefore, an improved mold is needed to solve these problems and produce nylon-reinforced cement nails with superior performance. Summary of the Invention

[0003] The purpose of this utility model is to solve the technical problem of insufficient bonding strength caused by the separation of the nylon ring and the groove filling part during molding. This utility model provides a nylon-reinforced cement nail mold.

[0004] The technical solution adopted in this utility model is as follows: A nylon-reinforced cement nail mold is used for injection molding steel cement nails with nylon reinforcement structures. The cement nail includes a nail head, a nail tip, and a circumferential annular groove. The mold includes: a lower mold with a nail tip positioning hole for axially fixing the nail tip; and an upper mold that forms an annular cavity and a groove cavity after being closed with the lower mold. The upper mold has a nail head positioning groove at its top for radially limiting the nail head.

[0005] In the mold-closed state: the annular cavity surrounds the steel nail body and is located below the nail head, and is used to form a nylon ring; the grooved cavity matches the shape of the annular groove and is connected to the annular cavity, and is used to form the groove filling part; the annular cavity and the grooved cavity form an integrated flow channel structure, so that the nylon material is filled synchronously and forms a mechanical interlocking structure.

[0006] Preferably, the lower mold is provided with guide pillars at the four corners, and the upper mold is provided with matching guide sleeves. The mating surfaces of the guide pillars and guide sleeves are tapered to achieve self-alignment during mold closing.

[0007] Preferably, the lower mold is provided with an ejection mechanism, including a hydraulic rod and a tapered ejector pin at the top of its telescopic rod. The taper of the tapered ejector pin matches the chamfer of the nail tip positioning hole, and the nail tip is pushed by the tapered surface during ejection.

[0008] Preferably, the bottom of the annular cavity and the sidewall of the grooved cavity are provided with multi-level injection molding channels, including a main channel and an annular array of micropore channels connected thereto.

[0009] Preferably, the microporous channels are radially distributed at the bottom of the annular cavity and spirally distributed around the sidewall of the grooved cavity.

[0010] Preferably, the top of the upper mold is provided with a pressure plate, one end of which is connected to the edge of the nail head positioning groove by a hinge, and the other end is locked by an elastic buckle, so that a clamping force is applied to the nail head when the mold is closed.

[0011] Preferably, the mold is a multi-cavity matrix structure containing at least 4×4 modular units, and the injection parameters of each unit flow channel are independently controlled by a flow divider valve.

[0012] Preferably, a nylon-reinforced cement nail, made using any of the molds described above, comprises: a steel nail body with an annular groove on its surface; an integrally molded nylon composite material structure, comprising: a groove filling portion covering the annular groove; and a nylon ring continuously connected to the groove filling portion, wherein the inner diameter of the nylon ring is tightly fitted with the steel nail body, and the outer diameter is smaller than the diameter of the nail head.

[0013] Preferably, the nylon composite material is glass fiber reinforced nylon.

[0014] Preferably, the connection between the groove filling portion and the nylon ring forms a shock-absorbing and reinforcing rib structure.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. The integrated flow channel structure of this utility model: The design of the annular cavity and the groove cavity is connected to realize the synchronous filling and molding of nylon material, forming a mechanically interlocked and reinforced structure. The integrated nylon structure significantly improves the pull-out force.

[0017] 2. Dynamic clamping and positioning: The pressure plate and elastic buckle work together to ensure the steel nails are absolutely fixed during the injection molding process;

[0018] 3. Multi-stage injection control: Radial and spiral distributed microporous channels enable uniform material filling and improve injection efficiency. Attached Figure Description

[0019] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the mold structure of this utility model;

[0021] Figure 2 This is a top view of the lower mold structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model;

[0023] Figure 4 This is a top view of the upper mold structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the upper mold of this utility model;

[0025] Figure 6 This is a schematic diagram of the steel nail body structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the nylon-reinforced cement nail structure of this utility model;

[0027] The markings in the diagram are as follows: 1-lower mold, 2-upper mold, 3-steel nail body, 11-nail tip positioning hole, 12-ejection mechanism, 13-guide post, 21-guide sleeve, 22-pressure plate, 23-nail head positioning groove, 24-annular cavity, 25-grooved cavity, 26-injection guide channel, 27-fastener, 31-annular groove, 32-nail head, 33-nylon ring, 34-nail tip. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] In one embodiment of this utility model, such as Figure 1-5As shown, this embodiment provides a nylon-reinforced cement nail mold for injection molding steel cement nails with nylon reinforcement structures. The cement nail includes a nail head 32, a nail tip 34, and a circumferential annular groove 31. The mold mainly consists of a lower mold 1 and an upper mold 2. The lower mold 1 is provided with a nail tip positioning hole 11, which is used to axially fix the nail tip 34, ensuring the accurate position of the nail tip 34 in the mold and providing a stable foundation for the subsequent molding process. After the upper mold 2 and the lower mold 1 are closed, an annular cavity 24 and a groove cavity 25 are formed. The nail head positioning groove 23 at the bottom of the upper mold 2 is used to radially limit the nail head 32, ensuring the stability of the nail head 32 when the mold is closed and avoiding displacement during the injection molding process.

[0031] In the mold-closed state, the annular cavity 24 surrounds the steel nail body 3 and is located below the nail head 32, used to form the nylon ring 33. The grooved cavity 25 matches the shape of the annular groove 31 and communicates with the annular cavity 24, used to form the groove filling part. The annular cavity 24 and the grooved cavity 25 form an integrated flow channel structure. This structure allows the nylon material to be filled synchronously and forms a mechanical interlocking structure, thereby improving the bonding strength between the nylon reinforcement structure and the steel nail body 3.

[0032] In another embodiment of this utility model, the lower mold 1 is provided with guide posts 13 at its four corners, and the upper mold 2 is provided with matching guide sleeves 21. The mating surfaces of the guide posts 13 and the guide sleeves 21 are tapered structures. By utilizing the characteristics of the tapered structure, self-alignment is achieved during mold closing, thereby improving the accuracy and efficiency of mold closing.

[0033] In another embodiment of this utility model, the lower mold 1 is provided with an ejection mechanism 12, including a hydraulic rod and a conical ejector pin at the top of its telescopic rod. The taper of the conical ejector pin matches the chamfer of the nail tip positioning hole 11. When ejecting, the nail tip 34 is pushed by the conical surface, which can smoothly and accurately eject the molded cement nail from the mold.

[0034] In another embodiment of this utility model, the bottom of the annular cavity 24 and the sidewall of the grooved cavity 25 are provided with multi-stage injection molding inlet channels 26, including a main channel and an annular array of microporous channels communicating with it. The microporous channels are radially distributed at the bottom of the annular cavity 24 and spirally distributed around the sidewall of the grooved cavity 25. This distribution pattern facilitates the uniform flow and filling of the nylon material, improving the quality of injection molding.

[0035] In another embodiment of this utility model, a pressure plate 22 is provided on the top of the upper mold 2. One end of the pressure plate 22 is connected to the edge of the nail head positioning groove 23 by a hinge, and the other end is locked by an elastic buckle 27. When the mold is closed, a clamping force is applied to the nail head 32 to further ensure the stability of the nail head 32.

[0036] In another embodiment of this utility model, the mold is a multi-cavity matrix structure, containing at least 4×4 molding units. The flow channels of each unit are independently controlled by a flow divider valve to control the injection parameters, which can realize the simultaneous molding of multiple cement nails, improve production efficiency, and enable precise control of the injection parameters of each molding unit according to different production needs.

[0037] like Figure 6-7 As shown, the nylon-reinforced cement nail manufactured using the aforementioned mold includes a steel nail body 3 with an annular groove 31 on its surface. The integrally molded nylon composite structure includes a groove-filling portion covering the annular groove 31, and a nylon ring 33 continuously connected to the groove-filling portion. The inner diameter of the nylon ring 33 fits tightly with the steel nail body 3, and its outer diameter is smaller than the diameter of the nail head 32. This structural design allows the nylon reinforcement structure to be tightly integrated with the steel nail body 3, effectively improving the performance of the cement nail.

[0038] Furthermore, the nylon composite material is glass fiber reinforced nylon. The addition of glass fiber can enhance the strength and stiffness of the nylon material, further improving the overall performance of the cement nail.

[0039] Furthermore, the connection between the groove filling part and the nylon ring 33 forms a shock-absorbing and reinforcing rib structure, which can improve the vibration resistance of the cement nail during use and enhance its stability.

[0040] The working principle of this utility model is as follows:

[0041] The mold usage process is as follows: First, the upper mold 2 is moved downwards, and the tapered mating surfaces of the guide post 13 and the guide sleeve 21 achieve self-alignment during mold closing, ensuring accurate mold closing between the upper mold 2 and the lower mold 1. After mold closing, the steel nail body 3 is placed on the mold, with the nail head 32 located in the nail head positioning groove 23, allowing the nail tip 34 to be inserted into the nail tip positioning hole 11, thus achieving axial fixation of the nail tip 34. Then, the pressure plate 22 is locked by the elastic buckle 27, applying a clamping force to the nail head 32 to ensure its stability. Next, injection molding is performed, with nylon material entering the annular cavity 24 and the recessed cavity 25 through the multi-stage injection molding guide channel 26. At the bottom of the annular cavity 24, nylon material flows evenly into the annular cavity 24 through radially distributed microporous channels. On the sidewall of the recessed cavity 25, it flows into the recessed cavity 25 through spirally distributed microporous channels. Since the annular cavity 24 and the recessed cavity 25 form an integrated flow channel structure, the nylon material fills synchronously, forming a nylon ring 33 and a recessed filling part, and a mechanical interlocking structure is formed between them. After molding, the pressure plate 22 is released, and the ejection mechanism 12 is activated. The hydraulic rod drives the conical ejector pin to move upwards. The conical surface of the conical ejector pin contacts the chamfer of the nail tip positioning hole 11, pushing the nail tip 34 and ejecting the molded cement nail from the mold.

[0042] Structure and Performance of Cement Nails: The manufactured nylon-reinforced cement nails have an annular groove 31 on the surface of the steel nail body 3, which is filled by a groove filling portion. A nylon ring 33 surrounds the steel nail body 3 and is located below the nail head 32. The nylon ring 33 fits tightly with the steel nail body 3, ensuring a certain degree of connection flexibility while also achieving a tight bond between the nylon reinforcement structure and the steel nail body 3 through a mechanical interlocking structure with the groove filling portion. When the cement nail is subjected to external forces, especially dynamic loads such as vibration, the shock-absorbing and reinforcing rib structure at the connection between the groove filling portion and the nylon ring 33 can effectively absorb and disperse energy, improving the cement nail's vibration resistance and stability.

[0043] Because glass fiber reinforced nylon is used as the composite material, the nylon-reinforced structure has high strength and stiffness, which can significantly improve the overall performance of cement nails and meet the needs of different scenarios.

[0044] In summary, the nylon-reinforced cement nail mold of this utility model has a reasonable structural design, which can realize the efficient and precise molding of cement nails with nylon reinforcement. The cement nails produced have excellent performance and good application prospects.

[0045] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A nylon reinforced cement nail mold for injection molding a steel cement nail with a nylon reinforced structure, the cement nail comprising a nail cap (32), a nail tip (34) and a circumferential annular groove (31); characterized in that, The mold includes: Lower mold (1): It is provided with nail tip positioning hole (11) for axially fixing nail tip (34); Upper mold (2): After being closed with the lower mold (1), it forms an annular cavity (24) and a groove cavity (25); The upper mold (2) is provided with a nail head positioning groove (23) at the top, which is used to radially limit the nail head (32). In the mold-closed state: The annular cavity (24) surrounds the steel nail body (3) and is located below the nail head (32) for forming a nylon ring (33). The groove cavity (25) is shaped to match the annular groove (31) and is connected to the annular cavity (24) for forming the groove filling part; The annular cavity (24) and the grooved cavity (25) form an integrated flow channel structure, which allows the nylon material to be filled synchronously and form a mechanical interlocking structure.

2. The mold of claim 1, wherein The lower mold (1) is provided with guide pillars (13) at the four corners, and the upper mold (2) is provided with matching guide sleeves (21). The mating surfaces of the guide pillars (13) and the guide sleeves (21) are tapered, which realizes self-alignment when the mold is closed.

3. The mold according to claim 1, characterized in that, The lower mold (1) is provided with an ejection mechanism (12), including a hydraulic rod and a conical ejector pin at the top of its telescopic rod. The taper of the conical ejector pin matches the chamfer of the nail tip positioning hole (11). When ejecting, the nail tip (34) is pushed by the conical surface contact.

4. The mold according to claim 1, characterized in that, The bottom of the annular cavity (24) and the side wall of the groove cavity (25) are provided with multi-level injection molding inlet channels (26), including a main channel and an annular array of micropore channels connected thereto.

5. The mold according to claim 4, characterized in that, The microporous channels are radially distributed at the bottom of the annular cavity (24) and spirally distributed around the sidewall of the grooved cavity (25).

6. The mold according to claim 1, characterized in that, The upper mold (2) is provided with a pressure plate (22) at the top. One end of the pressure plate (22) is connected to the edge of the nail head positioning groove (23) by a hinge, and the other end is locked by an elastic buckle (27). When the mold is closed, a clamping force is applied to the nail head (32).

7. The mold according to claim 1, characterized in that, The mold is a multi-cavity matrix structure containing at least 4×4 molding units, and the injection parameters of each unit flow channel are independently controlled by a flow divider valve.

8. A nylon-reinforced cement nail, manufactured using the nylon-reinforced cement nail mold described in any one of claims 1-7, characterized in that, include: The steel nail body (3) has an annular groove (31) on its surface; One-piece molded structure of nylon composite material, including: The groove filling portion covering the annular groove (31); A nylon ring (33) is continuously connected to the groove filling part. The inner diameter of the nylon ring (33) is tightly fitted with the steel nail body (3), and the outer diameter is smaller than the diameter of the nail head (32).

9. The cement nail according to claim 8, characterized in that, The nylon composite material is glass fiber reinforced nylon.

10. The cement nail according to claim 8, characterized in that, The connection between the groove filling part and the nylon ring (33) forms a shock-absorbing and reinforcing rib structure.

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