Anti-loosening wear-resistant cable tie and integrated injection molding method thereof

Abstract

This application discloses an anti-loosening and wear-resistant cable tie, comprising a tie body and a locking end, wherein the locking end is fixedly connected to one end of the tie body; a rack is provided on the tie body along its length direction; a locking cavity is provided in the locking end, the locking cavity penetrating the locking end for the free end of the tie body to pass through and lock; the key feature is that the rack is composed of multiple double-step anti-slip teeth continuously arranged along the length direction of the tie body, each double-step anti-slip tooth having an upper tooth surface facing the free end of the tie body and a lower tooth surface facing the fixed end of the tie body. This invention uses double-step anti-slip teeth to provide macroscopic locking, and simultaneously forms a secondary microscopic locking structure by setting mutually cooperating micro-anti-slip protrusions and grooves on the upper and lower tooth surfaces; when the cable tie is locked, the protrusions are embedded in the grooves, effectively preventing microscopic displacement caused by vibration or thermal expansion and contraction, reducing the lateral anti-loosening displacement, which is an improvement over the prior art.

Description

Technical Field

[0001] This application relates to the field of cable tie technology, and in particular to anti-loosening and wear-resistant cable ties and their integrated injection molding method. Background Technology

[0002] Cable ties are widely used in cable bundling, pipe fixing, and other fields. Existing cable ties are usually made of nylon injection molding, and are locked by the engagement of the toothed strip on the strap body and the locking teeth in the locking end.

[0003] However, under complex working conditions, such as equipment vibration or thermal expansion and contraction caused by temperature changes, the single helical tooth structure of existing cable ties is prone to micro-displacement, leading to loosening of the lock. At the same time, repeated friction between the tooth surfaces will aggravate wear, further reduce the reliability of locking, and seriously affect the safety and service life of the wire harness fixation. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides anti-loosening and wear-resistant cable ties and their integrated injection molding method.

[0005] Anti-loosening and wear-resistant cable ties include a strap body and a locking end, wherein the locking end is fixedly connected to one end of the strap body; The belt body is provided with a toothed rack along its length; The locking end has a locking cavity that extends through the locking end, allowing the free end of the belt to pass through and be locked in place; characterized in that... The rack is composed of multiple double-step anti-slip teeth arranged continuously along the length of the belt body. Each double-step anti-slip tooth has an upper tooth surface facing the free end of the belt body and a lower tooth surface facing the fixed end of the belt body. Multiple micro anti-slip bumps are provided on the upper tooth surface; A micro anti-slip groove is recessed on the lower tooth surface at a position corresponding to the micro anti-slip protrusion; When the free end of the belt passes through the locking cavity and is locked, the rack engages with the locking teeth in the locking cavity, and the micro anti-slip groove on the lower tooth surface of the upper double-step anti-slip tooth of the two adjacent double-step anti-slip teeth interlocks with the micro anti-slip protrusion on the upper tooth surface of the lower double-step anti-slip tooth to form a secondary locking structure.

[0006] As a preferred embodiment of the above technical solution, each of the double-step anti-slip teeth has an arc-shaped meshing surface facing the locking direction, and the arc-shaped meshing surface is located on the side of the tooth facing the locking end.

[0007] As a preferred embodiment of the above technical solution, the tips of each of the double-step anti-slip teeth are rounded, and reinforcing ribs are provided at the root of the teeth, with the reinforcing ribs being integrally connected to the belt body.

[0008] As a preferred embodiment of the above technical solution, the locking end is further provided with a hidden elastic unlocking piece. One end of the unlocking piece is integrally connected to the inner wall of the locking end, and the other end of the unlocking piece is a free end that extends into the locking cavity. Pressing the free end of the unlocking piece can disengage the rack from the locking teeth in the locking cavity.

[0009] As a preferred embodiment of the above technical solution, a lightweight reinforcing rib is provided in the middle of the belt body along its length direction. The lightweight reinforcing rib extends along the length direction of the belt body and is integrally formed with the belt body. An integrated injection molding method for anti-loosening and abrasion-resistant cable ties includes the following steps: S1: Provide a temperature-controlled injection mold cavity, the mold cavity includes a strip forming area and a locking end forming area, the strip forming area is provided with a toothed mold cavity that matches the shape of the double-step anti-slip teeth, the toothed mold cavity area is provided with a precision temperature control module, and a flow guide buffer groove is provided at the gate. S2: During injection molding, molten composite material is injected into the mold cavity through the flow guide buffer groove, and timing control is adopted. First, molten material is injected into the strip forming area to complete the injection molding of the main body of the strip. After a delay of 0.5-1s, molten material is injected into the locking end forming area to complete the injection molding of the locking end. S3: After injection molding is completed, a delayed ejection mechanism is used for demolding. The cable tie is ejected after it has completely cooled and solidified in the mold cavity to obtain the finished product.

[0010] In summary, the present invention has at least one of the following beneficial technical effects: 1. A double-step anti-slip tooth provides macroscopic locking, while a secondary microscopic locking structure is formed by setting interlocking micro anti-slip protrusions and grooves on the upper and lower tooth surfaces; when the cable tie is locked, the protrusions are embedded in the grooves, effectively preventing microscopic displacement caused by vibration or thermal expansion and contraction, reducing the lateral anti-loosening displacement, which is an improvement over existing technologies. 2. The secondary locking structure transforms the traditional sliding friction between tooth surfaces into a static locking mechanism, reducing dynamic wear; combined with the tooth tip fillet and arc-shaped meshing surface design, it reduces stress concentration, improves tooth surface wear resistance, and extends the service life of the cable tie. 3. For complex tooth-shaped structures, a zoned temperature-controlled mold cavity and sequential injection molding process are adopted. The strip body is injected first and then the locking end is delayed to avoid damage to the micro-protrusions and grooves caused by melt impact, ensuring the complete replication of the secondary locking structure and improving the molding yield. 4. Built-in hidden elastic unlocking piece enables non-destructive disassembly and reuse. The unlocking piece and the locking end are integrally molded to prevent assembly from falling off, balancing functionality and manufacturing convenience. Attached Figure Description

[0011] Figure 1This is a schematic diagram of the overall structure of the anti-loosening and wear-resistant cable tie of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cable tie locking end of the present invention.

[0012] 1. Belt body; 11. Unlocking plate; 12. Lightweight reinforcing rib; 2. Locking end; 3. Rack; 31. Anti-slip tooth; 32. Arc-shaped meshing surface; 33. Tooth tip; 34. Tooth root; 35. Reinforcing rib; 36. Upper tooth surface; 37. Miniature anti-slip protrusions; 38. Lower tooth surface; 39. Miniature anti-slip groove; 4. Locking cavity; 41. Belt body forming area; 42. Locking end forming area; 43. Precision temperature control module; 44. Gate; 45. Flow guide buffer groove; Detailed Implementation

[0013] The present application will be further described in detail below with reference to the embodiments.

[0014] This application relates to a non-loosening and wear-resistant cable tie. The cable tie includes a strap body 1 and a locking end 2. The locking end 2 is fixedly connected to one end of the strap body 1. A toothed rack 3 is provided on the strap body 1 along its length direction. A locking cavity 4 is provided in the locking end 2. The locking cavity 4 passes through the locking end 2 and is used for the free end of the strap body 1 to pass through and lock. The rack 3 is composed of multiple double-step anti-slip teeth 31 continuously arranged along the length of the belt body; each double-step anti-slip tooth 31 has an upper tooth surface 36 facing the free end of the belt body and a lower tooth surface 38 facing the fixed end of the belt body; each double-step anti-slip tooth 31 also has an arc-shaped meshing surface 32 facing the locking direction, the arc-shaped meshing surface 32 is located on the side of the tooth facing the locking end 2; the tooth tip 33 of each double-step anti-slip tooth 31 has a rounded corner transition with a radius of R0.1mm, and a reinforcing rib 35 is provided at the tooth root 34, the reinforcing rib 35 being integrally connected to the belt body 1.

[0015] An integrated injection molding method for anti-loosening and abrasion-resistant cable ties includes the following steps: S1: Provide a temperature-controlled injection mold cavity, the mold cavity includes a strip forming area 41 and a locking end forming area 42, the strip forming area 41 is provided with a toothed mold cavity that matches the shape of the double-step anti-slip teeth 31, the toothed mold cavity area is provided with a precision temperature control module 43, and a flow guide buffer groove 45 is provided at the gate 44. S2: During injection molding, molten composite material is injected into the mold cavity through the flow guide buffer groove 45, and timing control is adopted. First, molten material is injected into the strip forming area 41 to complete the injection molding of the main body of the strip. After a delay of 0.5-1s, molten material is injected into the locking end forming area 42 to complete the injection molding of the locking end. S3: After injection molding is completed, a delayed ejection mechanism is used for demolding. The cable tie is ejected after it has completely cooled and solidified in the mold cavity to obtain the finished product. Specific Implementation The cable ties prepared in this embodiment were compared with commercially available ordinary nylon cable ties, and the results are shown in Table 1.

[0017] Example 1

[0018] In this embodiment, the cable tie is made of a composite material of nylon 66 substrate with modified nano-silica and polytetrafluoroethylene micro powder. The specific ratio is: 100 parts of nylon 66 substrate, 8 parts of nano-silica, and 5 parts of polytetrafluoroethylene micro powder; after mixing, it is injection molded.

[0019] Example 2

[0020] The results are basically the same as in Example 1, except that the micro anti-slip bumps 37 are designed as pyramids and the micro anti-slip grooves 39 are matching pyramidal grooves; the delayed injection time is 0.5s; the test results are comparable to those in Example 1, with a lateral displacement of 0.09mm and a molding yield of 99.2%.

[0021] Example 3

[0022] The results were basically the same as in Example 1, except that the composite material contained 5 parts of nano-silica and 3 parts of polytetrafluoroethylene micro powder. The test results showed that its strapping smoothness and wear resistance were slightly lower than those in Example 1, but still significantly better than ordinary cable ties. Specific data: lateral displacement 0.10 mm, bending resistance 105 times, molding yield 99.3%.

[0023] Comparative Example 1 Commercially available ordinary nylon cable ties use a conventional single-tooth design and a conventional one-time injection molding process. Test data are listed in Table 1.

[0024] Table 1 The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. Anti-loosening and abrasion-resistant cable ties, characterized in that: The belt includes a belt body (1) and a locking end (2), the locking end (2) being fixedly connected to one end of the belt body (1); a rack (3) is provided on the belt body (1) along its length direction; a locking cavity (4) is provided inside the locking end (2), the locking cavity (4) penetrating the locking end (2) for the free end of the belt body (1) to pass through; characterized in that the rack (3) is composed of a plurality of double-step anti-slip teeth (31) continuously arranged along the length direction of the belt body, each of the double-step anti-slip teeth (31) having an upper tooth surface (36) facing the free end of the belt body and a lower tooth surface (38) facing the fixed end of the belt body. The upper tooth surface (36) is provided with a plurality of micro anti-slip protrusions (37); A micro anti-slip groove (39) is recessed at the position corresponding to the micro anti-slip protrusion (37) on the lower tooth surface (38). When the free end of the belt (1) passes through the locking cavity (4) and locks, the rack (3) engages with the locking teeth in the locking cavity (4), and in the two adjacent double-step anti-slip teeth (31), the micro anti-slip groove (39) on the lower tooth surface (38) of the upper double-step anti-slip tooth (31) and the micro anti-slip protrusion (37) on the upper tooth surface (36) of the lower double-step anti-slip tooth (31) interlock with each other to form a secondary locking structure.

2. The anti-loosening and abrasion-resistant cable tie according to claim 1, characterized in that: Each of the double-step anti-slip teeth (31) has an arcuate engagement surface (32) facing the locking direction, the arcuate engagement surface (32) being located on the side of the tooth facing the locking end (2).

3. The anti-loosening and abrasion-resistant cable tie according to claim 1, characterized in that: Each of the double-step anti-slip teeth (31) has a rounded corner transition at the tip (33) and a reinforcing rib (35) at the root (34), which is integrally connected with the belt body (1).

4. The anti-loosening and abrasion-resistant cable tie according to claim 1, characterized in that, The locking end (2) is also provided with a hidden elastic unlocking piece (11). One end of the unlocking piece (11) is integrally connected to the inner wall of the locking end (2), and the other end of the unlocking piece (11) is a free end that extends into the locking cavity (4).

5. The anti-loosening and abrasion-resistant cable tie according to claim 1, characterized in that, The belt (1) is provided with a lightweight reinforcing rib (12) along its length in the middle part. The lightweight reinforcing rib (12) extends along the length of the belt and is integrally formed with the belt (1).

6. The integrated injection molding method for the anti-loosening and wear-resistant cable tie according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Provide a temperature-controlled injection mold cavity, the mold cavity includes a strip forming area (41) and a locking end forming area (42), the strip forming area (41) is provided with a toothed mold cavity that matches the shape of the double-step anti-slip teeth (31), the toothed mold cavity area is provided with a precision temperature control module (43), and a flow guide buffer groove (45) is provided at the gate (44). S2: During injection molding, molten composite material is injected into the mold cavity through the flow buffer groove (45), and timing control is adopted. First, molten material is injected into the strip forming area (41) to complete the injection molding of the main body of the strip. After a delay of 0.5-1s, molten material is injected into the locking end forming area (42) to complete the injection molding of the locking end. S3: After injection molding is completed, a delayed ejection mechanism is used for demolding. The cable tie is ejected after it has completely cooled and solidified in the mold cavity to obtain the finished product.

7. The integrated injection molding method according to claim 6, characterized in that, In S2, the delay time is 0.8s.

8. The integrated injection molding method according to claim 6, characterized in that, The temperature control accuracy of the precision temperature control module (43) is ±1℃.

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