Ejection structure of a vehicle guide rail

Abstract

The utility model provides an ejection structure of a vehicle guide rail for assisting the vehicle guide rail to separate from an injection mold, which comprises a first ejector, an ejection panel assembly and a driving member, wherein the first ejector comprises an inclined knife edge arranged below a gate of the injection mold; at least one end surface of the ejection panel assembly is connected with the first ejector; the driving member is in driving connection with the ejection panel assembly and can control the ejection panel assembly to displace along the length direction of the first ejector to cut off the excess material at the gate.

Description

Technical Field

[0001] This utility model relates to the field of tooling, and in particular to an ejection structure for a vehicle guide rail. Background Technology

[0002] Currently, vehicle guide rails are typically manufactured using injection molding. Since most surfaces of vehicle guide rails serve both aesthetic and functional purposes, their surface flatness and smoothness directly affect the sliding performance and assembly accuracy of the guide rails.

[0003] In the injection molding process, guide rail products are typically fed through a gate, leaving excess injection material at the gate after molding. In existing technologies, this excess material is mostly removed manually or mechanically after demolding. This not only increases subsequent processing steps, but manual cutting can also easily lead to uneven cuts and, if not handled properly, damage to the functional surfaces of the guide rail, thus affecting product consistency and performance. Especially for high-precision guide rail products, the instability of the gate cutting process becomes one of the main factors affecting product yield. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an ejection structure for vehicle guide rails to achieve smooth cutting at the injection gate.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An ejection structure for a vehicle guide rail, used to assist the vehicle guide rail in detaching from an injection mold, includes: The first ejector includes an inclined cutting edge positioned below the gate of the injection mold; The ejector panel assembly is connected to the first ejector component; The driving component is connected to the ejector panel assembly and is capable of driving the ejector panel assembly to move along the length direction of the first ejector to remove excess material at the gate.

[0006] In some embodiments, the ejector panel assembly includes a first panel and a second panel; the upper end face of the first panel is elastically connected to the lower end face of the second panel, the first ejector penetrates the second panel and is fixedly connected to the first panel; the driving member is drively connected to the first panel.

[0007] In some embodiments, a base plate is also included, which is disposed below the first panel, and the driving member is fixedly connected to the base plate; a support column is provided on the upper end surface of the base plate, which penetrates the first panel and abuts against the lower end surface of the second panel.

[0008] In some embodiments, a spring is provided between the first panel and the second panel, the natural length of the spring being greater than the height of the support column.

[0009] In some embodiments, a second ejector is also included, the second ejector including at least one flat ejector surface that abuts against the side edge of the sliding surface of the vehicle guide rail. The second ejector abuts against the upper surface of the second panel.

[0010] In some embodiments, the ejector panel assembly further includes a third panel, the lower end face of which abuts against the upper end face of the second panel; the second ejector is fixedly connected to the third panel.

[0011] In some embodiments, a mold core assembly for forming the vehicle guide rail is also included, the mold core assembly including an ejector groove, the second ejector passing through the ejector groove and engaging with the ejector groove.

[0012] In some embodiments, the ejector groove includes a variable diameter section, and the shape of the second ejector matches the variable diameter section and engages with the variable diameter section.

[0013] In some embodiments, the second ejector includes an abutment and a push rod, the ejector surface of the abutment abuts against the vehicle guide rail, the end face of the abutment away from the vehicle guide rail is connected to the push rod, and the push rod is connected to the third panel; the abutment engages with the variable diameter section.

[0014] In some implementations, the number of the first ejector pins matches the number of gates in the injection mold.

[0015] The beneficial effects of this utility model include at least the following: providing an ejection structure for a vehicle guide rail, by setting a first ejector with an inclined cutting edge below the gate of the injection mold, which can directly cut off the excess injection material at the gate during the ejection process, avoiding subsequent manual cutting and ensuring the flatness and consistency of the gate cut; at the same time, the first ejector, the ejection panel assembly, and the drive component form a linkage structure, which can achieve stable ejection movement along the length direction under the action of the drive component, thereby achieving smooth demolding of the vehicle guide rail and avoiding the impact of excess injection material at the gate on the smoothness of the guide rail's functional surface. Attached Figure Description

[0016] Figure 1 A schematic diagram of the mold closing mechanism for injection molds used in the production of vehicle guide rails; Figure 2 This is a top view of the injection mold; Figure 3 for Figure 2 Sectional view AA in the middle; Figure 4 for Figure 3 Enlarged view of part B in the image; Figure 5 This is a schematic diagram of the lower mold of an injection mold; Figure 6 for Figure 5 A magnified view of part C in the image; Figure 7 This is an assembly diagram of the ejector panel assembly and the base plate; Figure 8 This is a sectional view of the top panel assembly and the base plate; Figure 9 This is a schematic diagram of the assembly of the first panel and the base plate; Figure 10 This is the front view of the vehicle guide rail; Figure 11 This is a schematic diagram illustrating the working principle of the second ejector component; Figure 12 This is a schematic diagram of the assembly structure of the second ejector component; Figure 13 This is a schematic diagram of the driving component; Label Explanation: 1. First ejector; 11. Inclined cutting edge; 2. Ejector panel assembly; 21. First panel; 22. Second panel; 23. Third panel; 3. Drive component; 4. Base plate; 41. Support column; 5. Spring; 6. Second ejector; 61. Ejector surface; 62. Abutment joint; 63. Ejector pin; 7. Mold core assembly; 71. Ejector groove; 72. Variable diameter section; 73. First position; 8. Gate; 9. Vehicle guide rail; 10. Injection molding machine; 11. Mold. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figures 1 to 4 An ejection structure for a vehicle guide rail, the ejection structure being disposed within an injection mold 11, for assisting the vehicle guide rail 9 in disengaging from the mold 11, comprising: The first ejector 1 includes an inclined cutting edge 11, which is positioned below the gate 8 of the injection mold 11. The ejector panel assembly 2 is connected to the first ejector component 1; The driving component 3 is connected to the ejector panel assembly 2 and can control the ejector panel assembly 2 to move along the length direction of the first ejector 1 to remove excess material at the gate 8.

[0019] As can be seen from the above description, the beneficial effects of this utility model are as follows: by setting a first ejector 1 with an inclined cutting edge 11 below the gate 8 of the injection mold 11, the excess injection material at the gate 8 can be directly cut off during the ejection process, avoiding subsequent manual cutting and ensuring the flatness and consistency of the cut at the gate 8; at the same time, the first ejector 1 forms a linkage structure with the ejector panel assembly 2 and the drive component 3, and can achieve stable ejection movement along the length direction under the action of the drive component 3, thereby achieving smooth demolding of the vehicle guide rail 9 and avoiding the influence of excess injection material at the gate 8 on the smoothness of the guide rail functional surface.

[0020] Please refer to Figure 5 and Figure 6 In one embodiment, the first ejector 1 has an inclined cutting edge 11, which is located below the gate 8 of the injection mold 11. During the mold opening stage, the drive unit 3 drives the ejector panel assembly 2 to move upward along the length direction of the first ejector 1, thereby causing the first ejector 1 to be ejected upward synchronously. When the first ejector 1 moves to a preset position, its inclined cutting edge 11 abuts against the first position 73 of the upper mold core. Due to the relative shearing force formed between the two, the excess injection molding material at the gate 8 is cut off.

[0021] Please refer to Figure 3 and Figure 7 In some embodiments, the ejector panel assembly 2 includes a first panel 21 and a second panel 22; the upper end face of the first panel 21 is elastically connected to the lower end face of the second panel 22, the first ejector 1 passes through the second panel 22 and is fixedly connected to the first panel 21; the driving member 3 is drively connected to the first panel 21.

[0022] As described above, by designing the ejector panel assembly 2 as two layers (first panel 21 and second panel 22) and using an elastic connection, the first ejector 1 can both penetrate the second panel 22 and be fixed to the first panel 21, forming a flexible buffer. This allows the impact force caused by the movement of the mold 11 or uneven force during ejection to be absorbed and dispersed through the elastic connection, preventing damage to the guide rail and improving the stability of the ejection action. The drive component 3 is directly connected to the first panel 21 for reliable power transmission, resulting in a smooth and efficient ejection process.

[0023] In some embodiments, the number of the first ejector 1 matches the number of gates 8 of the injection mold 11.

[0024] As described above, by matching the number of first ejector parts 1 with the number of gates 8 in the injection mold 11, the effect of simultaneously cutting off the gates 8 at multiple points can be achieved, ensuring that the material at each gate 8 location is automatically removed during the ejection process, avoiding residue. This design improves production efficiency, reduces manual operation steps, and ensures the consistency of product quality across multiple gate 8 locations.

[0025] Please refer to Figure 7 and Figure 8 In some embodiments, a base plate 4 is also included, which is disposed below the first panel 21, and the driving member 3 is connected to the base plate 4; a support column 41 is provided on the upper end surface of the base plate 4, which penetrates the first panel 21 and abuts against the lower end surface of the second panel 22.

[0026] As described above, by setting a base plate 4 below the first panel 21 and arranging support columns 41 between the base plate 4 and the second panel 22, a stable load-bearing structure can be formed. The design of the support columns 41 prevents the panel from bending or deforming when subjected to ejection force, thereby improving the overall rigidity and ejection accuracy of the mold 11. At the same time, due to the presence of the support columns 41, there is a fixed space between the base plate 4 and the second panel 22 to accommodate the first panel 21. There is also a reserved gap between the first panel 21 and the second panel 22. When the driving component 3 drives the first panel 21 to rise, the first panel 21 and the second panel 22 first come into contact, and then the first ejector 1 on the second panel 22 is pushed to cut off the excess material at the gate 8, ensuring more stable transmission of driving force, effectively extending the service life of the mold 11 and improving the consistency of the guide rail products.

[0027] Please refer to Figure 9 and Figure 13 The driving component 3 is a mechanically driven ejector roller; the mold 11 is installed on the injection molding machine 10 to realize the injection molding of the product. The ejector roller is set inside the injection molding machine 10 and is driven by the hydraulic cylinder of the injection molding machine 10. The top of the ejector roller passes through the bottom plate 4 and pushes the first panel 21 to abut against the second panel 22.

[0028] Please refer to Figure 8 and Figure 9 In some embodiments, a spring 5 is provided between the first panel 21 and the second panel 22, and the natural length of the spring 5 is greater than the height of the support column 41.

[0029] As described above, a spring 5 is added between the first panel 21 and the second panel 22, and the natural length of the spring 5 is greater than the height of the support column 41, so that the panels maintain a certain preload in the initial state. During the ejection process, the spring 5 can provide flexible buffering, which can both assist in cutting off the material of the gate 8 and reduce the impact of hard metal-to-hard contact. This design improves the smoothness and controllability of the ejection process, while reducing the wear of parts.

[0030] Please refer to Figures 10 to 12 In some embodiments, a second ejector 6 is also included, the second ejector 6 including at least one flat ejector surface 61, the ejector surface 61 abutting against the side edge of the sliding surface of the vehicle guide rail 9. The second ejector 6 abuts against the upper surface of the second panel 22.

[0031] As described above, by setting a second ejector 6 and designing it with a flat ejector surface 61, it can contact the side edge of the guide rail sliding surface when ejecting the vehicle guide rail 9, avoiding direct action on the functional surface, thus ensuring that the guide rail surface is smooth and flat, leaving no ejection marks. Compared with the traditional ejector pin ejection method, this structure significantly improves the appearance quality and performance of the product, and is especially suitable for the mold production of high-precision guide rails.

[0032] Please refer to Figure 12 In some embodiments, the ejector panel assembly 2 further includes a third panel 23, the lower end face of the third panel 23 abutting against the upper end face of the second panel 22; the second ejector 6 is fixedly connected to the third panel 23.

[0033] As described above, by adding a third panel 23 to the ejector panel assembly 2, the second ejector 6 can be fixed to the third panel 23, forming a layered ejection structure. This structure allows the ejection force to be transmitted and dispersed step by step, avoiding concentrated action on a single component, thereby further improving the stability and reliability of ejection. At the same time, the layered structure also facilitates assembly and maintenance, enhancing the modular design of the mold.

[0034] In some embodiments, a mold core assembly 7 for forming the vehicle guide rail 9 is also included, the mold core assembly 7 including an ejector groove 71, the second ejector 6 passing through the ejector groove 71 and engaging with the ejector groove 71.

[0035] As described above, the design of the ejector groove 71 in the mold core assembly 7, with the second ejector 6 passing through and engaging with it, ensures that the second ejector 6 is effectively guided during movement, preventing offset or skew. This precise guidance not only improves the accuracy of the ejection action but also prevents scratches on the surface of the vehicle guide rail 9 due to unstable ejector movement, effectively ensuring the safety and yield of the demolding process.

[0036] Please refer to Figure 12 In some embodiments, the ejector groove 71 includes a variable diameter section 72, and the shape of the second ejector 6 matches the variable diameter section 72 and engages with the variable diameter section 72.

[0037] As described above, by setting a variable diameter section 72 in the ejector groove 71 and matching and engaging the shape of the second ejector 6 with that of the variable diameter section 72, reliable positioning and limiting of the ejector can be achieved. The variable diameter section 72 provides additional engagement stability, ensuring that the ejector will not slide or misalign under force, thereby improving the accuracy and consistency of gate 8 removal and guide rail ejection.

[0038] Please refer to Figure 12 In some embodiments, the second ejector 6 includes an abutment 62 and a push rod 63. The ejector surface 61 of the abutment 62 abuts against the vehicle guide rail 9. The end face of the abutment 62 away from the vehicle guide rail 9 is connected to the push rod 63. The push rod 63 is connected to the third panel 23. The abutment 62 is engaged with the variable diameter section 72.

[0039] As described above, the second ejector 6 is further refined into a combination structure of an abutment 62 and an ejector pin 63. The abutment 62 directly contacts the vehicle guide rail 9, providing a flat ejection surface 61, thus ensuring seamless demolding. The ejector pin 63 connects to the third panel 23, ensuring reliable power transmission. The engagement between the abutment 62 and the variable diameter section 72 further enhances guiding stability and anti-deviation capability, making the ejection process both smooth and efficient, and avoiding guide rail damage caused by deviation.

[0040] Embodiment 1 of this utility model is as follows: Please refer to Figures 1 to 4 An ejection structure for a vehicle guide rail 9, used to assist the vehicle guide rail 9 in detaching from the injection mold, includes: a first ejector 1, an ejector panel assembly 2, a drive 3, a second ejector 6, and a mold core assembly 7, etc.

[0041] Please refer to Figure 4 The first ejector 1 includes an inclined cutting edge 11, which is positioned below the gate 8 of the injection mold. During the mold opening stage, the drive unit 3 drives the ejector panel assembly 2 to move upward along the length of the first ejector 1, thereby causing the first ejector 1 to rise synchronously. When the first ejector 1 moves to a preset position, its inclined cutting edge 11 abuts against the corresponding position of the upper mold core, forming a relative shearing force, thereby cutting off the excess injection material at the gate 8, realizing automatic removal of material from the gate 8, and avoiding manual secondary cutting.

[0042] Please refer to Figure 3 , Figure 7 and Figure 8 The ejector panel assembly 2 includes a first panel 21, a second panel 22, and a third panel 23. The upper end face of the first panel 21 and the lower end face of the second panel 22 are connected by a spring 5. The first ejector 1 passes through the second panel 22 and is fixedly connected to the first panel 21. The driving component 3 is drively connected to the first panel 21. Under the action of the driving component 3, this structure ensures that the first ejector 1 rises synchronously with the first panel 21. The elastic connection also acts as a buffer, absorbing the impact force generated by uneven force during the ejection process, thereby preventing damage to the guide rail and improving the smoothness of the ejection action.

[0043] Please refer to Figure 8 and Figure 9 A base plate 4 is provided below the first panel 21, and the driving component 3 is connected to the base plate 4. A support column 41 is provided on the upper end surface of the base plate 4. The support column 41 passes through the first panel 21 and abuts against the lower end surface of the second panel 22, thereby forming a stable load-bearing structure. This structure improves the overall rigidity of the mold and prevents the panel from bending and deforming when it is ejected. On the other hand, through the synergistic effect of the support column 41 and the elastic connection, when the first panel 21 rises, it can first push the first panel 21 to abut against the second panel 22, and then drive the first ejector 1 to complete the gate 8 removal action, so that the driving force transmission is stable and reliable.

[0044] Please refer to Figures 10 to 12 A second ejector 6 abuts against the upper surface of the second panel 22. The second ejector 6 includes at least one flat ejector surface 61, which abuts against the side edge of the sliding surface of the vehicle guide rail 9. This structure avoids direct force on the functional surface of the guide rail, ensuring a smooth and mark-free surface. To further enhance stability, the second ejector 6 is fixed to the third panel 23, with the lower surface of the third panel 23 abutting against the upper surface of the second panel 22, forming a layered ejection structure. This layered structure can gradually disperse the ejection force, avoiding damage caused by concentrated force and improving the convenience of assembly and maintenance.

[0045] The mold core assembly 7 includes an ejector groove 71, through which a second ejector 6 passes and engages with the ejector groove 71. During this process, the ejector groove 71 acts as a guide, ensuring that the second ejector 6 does not shift or tilt during ejection, thus preventing scratches on the guide rail surface. Furthermore, the ejector groove 71 includes a variable diameter section 72, the shape of which matches and engages with the variable diameter section 72, thereby achieving reliable positioning and limiting of the first ejector 1, ensuring stable cut position, and improving the accuracy of guide rail ejection and gate 8 removal.

[0046] In a further embodiment, the second ejector 6 specifically includes an abutment 62 and an ejector rod 63. The ejection surface 61 of the abutment 62 abuts against the vehicle guide rail 9, ensuring that the guide rail surface is free of marks during ejection; the end of the abutment 62 away from the vehicle guide rail 9 is connected to the ejector rod 63, which in turn is connected to the third panel 23, forming a complete power transmission path. The snap-fit ​​design between the abutment 62 and the variable diameter section 72 provides additional guidance and limitation during ejection, improving anti-displacement capability and making the demolding process smooth and reliable.

[0047] Furthermore, the number of the first ejector parts matches the number of gates in the injection mold, thereby achieving the effect of simultaneously cutting off the gates at multiple points. Through this design, excess material at all gates can be automatically removed in a single ejection action, avoiding residue, ensuring consistent product quality, improving production efficiency, and reducing manual intervention.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An ejection structure for a vehicle guide rail, used to assist the vehicle guide rail in detaching from an injection mold, characterized in that: include: The first ejector includes an inclined cutting edge positioned below the gate of the injection mold; The ejector panel assembly is connected to the first ejector component; The driving component is connected to the ejector panel assembly and is capable of driving the ejector panel assembly to move along the length direction of the first ejector to remove excess material at the gate.

2. The ejection structure of a vehicle guide rail according to claim 1, characterized in that: The ejector panel assembly includes a first panel and a second panel; the upper end face of the first panel is elastically connected to the lower end face of the second panel, the first ejector penetrates the second panel and is fixedly connected to the first panel; the driving member is drively connected to the first panel.

3. The ejection structure of a vehicle guide rail according to claim 2, characterized in that: It also includes a base plate, which is located below the first panel, and the driving component is connected to the base plate; the upper end surface of the base plate is provided with a support column, which passes through the first panel and abuts against the lower end surface of the second panel.

4. The ejection structure of a vehicle guide rail according to claim 3, characterized in that: A spring is provided between the first panel and the second panel, and the natural length of the spring is greater than the height of the support column.

5. The ejection structure of a vehicle guide rail according to claim 2, characterized in that: It also includes a second ejector, which includes at least one flat ejector surface that abuts against the side edge of the sliding surface of the vehicle guide rail. The second ejector abuts against the upper surface of the second panel.

6. The ejection structure of a vehicle guide rail according to claim 5, characterized in that: The ejector panel assembly further includes a third panel, the lower end face of which abuts against the upper end face of the second panel; the second ejector is fixedly connected to the third panel.

7. The ejection structure of a vehicle guide rail according to claim 6, characterized in that: It also includes a mold core assembly for forming the vehicle guide rail, the mold core assembly including an ejector groove, the second ejector passing through the ejector groove and engaging with the ejector groove.

8. The ejection structure of a vehicle guide rail according to claim 7, characterized in that: The ejector groove includes a variable diameter section, and the shape of the second ejector is matched with the variable diameter section and engages with the variable diameter section.

9. The ejection structure of a vehicle guide rail according to claim 8, characterized in that: The second ejector includes an abutment and a push rod. The ejector surface of the abutment abuts against the vehicle guide rail, and the end face of the abutment away from the vehicle guide rail is connected to the push rod. The push rod is connected to the third panel. The abutment engages with the variable diameter section.

10. The ejection structure of a vehicle guide rail according to claim 1, characterized in that: The number of the first ejector pins matches the number of gates in the injection mold.

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