An edge trimming injection mechanism and injection mold

Abstract

The application discloses a kind of edge covering injection mechanism and mould assembly, for connecting guide rail and edge covering, the inner cavity of the guide rail is provided with mud baffle hook, it is characterized in that, including first sliding assembly and with the first sliding assembly relatively slidable connection second sliding assembly;The injection part for supporting the guide rail is formed when the first sliding assembly with the second sliding assembly closes mould, the upper surface of the injection part has injection slot, the injection slot is provided with the clearance groove matched with the mud baffle hook, and clearance gap is formed between the clearance groove and the mud baffle hook;The contact surface of the first sliding assembly with the second sliding assembly has inclined arrangement, so that when the first sliding assembly and the second sliding assembly relatively slide and gradually separate, the clearance groove gradually sinks relative to the second sliding assembly.The application can realize the quick moulding and demoulding of guide rail, and can avoid the deformation of guide rail during injection molding.

Description

Technical Field

[0001] This invention relates to the field of edge-binding production technology, and in particular to an edge-binding injection molding mechanism and an injection mold. Background Technology

[0002] Currently, most mainstream automotive glass edge-wrapping assemblies, both domestically and internationally, are manufactured by directly wrapping the glass edge with sealing materials (commonly PVC, TPE, or PU soft rubber) through mold injection. In addition to the glass, accessories that need to be integrally injection molded with the glass include guide rails, studs, and inserts.

[0003] Because the mold for injection-molded guide rails has a mudguard groove inside, the mold slider or ejector mechanism must form a clearance area corresponding to the mudguard groove in the guide rail withdrawal direction. Otherwise, the mudguard hooks used to form the mudguard groove will prevent the guide rail from entering and exiting the mold. Under strong injection pressure, the guide rail and other accessories must have sufficient support for integral injection molding in the mold; otherwise, the accessories will deform under pressure. The formation of clearance areas inevitably means that the guide rail cannot receive sufficient support in these areas, leading to deformation of the guide rail during injection molding and a decrease in the product assembly yield. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an edge-wrapping injection molding mechanism and an injection mold, which reduces the risk of guide rail deformation under pressure while ensuring that the guide rail can enter and exit the mold.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] An edge-sealing injection molding mechanism for connecting a guide rail and an edge, wherein the inner cavity of the guide rail is provided with a mud-blocking hook, and includes a first sliding component and a second sliding component that can be slidably connected to the first sliding component;

[0007] When the first sliding component and the second sliding component are molded together, they form an injection part for supporting the guide rail. The upper surface of the injection part has an injection groove, and an anti-cavity groove matching the mudguard hook is provided in the injection groove. An anti-cavity gap is formed between the anti-cavity groove and the mudguard hook.

[0008] The first sliding component and the second sliding component have an inclined contact surface, so that when the first sliding component and the second sliding component slide relative to each other and gradually separate, the clearance groove gradually sinks relative to the second sliding component.

[0009] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0010] An injection mold includes a base, a guide assembly, and an edge-wrapping injection mechanism as described above;

[0011] Both the guide component and the edge-sealing injection molding mechanism are mounted on the base, and the guide component is located at both ends of the edge-sealing injection molding mechanism along its length and abuts against the edge-sealing injection molding mechanism, so that the second sliding component of the edge-sealing injection molding mechanism can move along the guide component.

[0012] The beneficial effects of this invention are as follows: A first sliding component and a second sliding component form an injection molding part that provides support for the guide rail and the edge banding. Since the first and second sliding components are slidably arranged relative to each other, as they slide relative to each other and gradually separate, the first sliding component gradually sinks relative to the second sliding component, and the inner cavity of the guide rail gradually separates from the second sliding component until the second sliding component is completely separated from the guide rail. At this point, the space for relative movement between the guide rail and the first sliding component increases, thereby enabling rapid demolding and mold insertion. Furthermore, a clearance groove matching the mudguard hook is provided, forming a small clearance area with the mudguard hook. This provides clearance space for the mudguard hook during injection molding and also supports the mudguard hook during the injection molding process, preventing the guide rail from deforming due to pressure in the clearance area. This invention achieves rapid mold insertion and demolding of the guide rail, while providing good support for the guide rail in the clearance area, preventing deformation under pressure, and improving the yield rate of the final product. Attached Figure Description

[0013] Figure 1 This is a partial structural cross-sectional view of a mold slider in the prior art;

[0014] Figure 2 This is a partial structural diagram of the injection mold in this invention;

[0015] Figure 3 for Figure 2 A sectional view;

[0016] Figure 4 This is a partial structural cross-sectional view of the edge-wrapping injection molding mechanism in this invention;

[0017] Label Explanation:

[0018] 1. Base;

[0019] 2. Guiding components;

[0020] 3. Guide rail; 31. Mudguard groove; 32. Mudguard hook;

[0021] 4. Edge-sealing injection molding mechanism; 40. Clearance area; 41. First sliding assembly; 411. Upper slider; 4111. Dovetail groove; 412. Linkage assembly; 4121. Reset component; 4122. Transmission limiting component; 4123. Sliding channel; 42. Second sliding assembly; 421. Lower slider; 4211. Dovetail tenon; 422. Limiting block; 423. Driving component; 43. Injection section; 431. Injection groove; 432. Clearance groove; 4321. First inclined surface; 4322. Second inclined surface; 44. Contact surface;

[0022] 5. Binding;

[0023] 6. Mold slider. Detailed Implementation

[0024] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Because the guide rail 3 has an internal mudguard groove 31, the mold slider 6 or the straight ejector mechanism must form a clearance area 40 corresponding to the mudguard groove 31 in the guide rail 3's withdrawal direction. Otherwise, the mudguard hooks 32 used to form the mudguard groove 31 will prevent the guide rail 3 from entering and exiting the mold. Figure 1 Under strong injection pressure, the guide rail 3, integrally injection molded with the glass and other accessories in the mold, must have sufficient support; otherwise, the surface of the guide rail 3 will deform under pressure. The formation of the clearance area 40 inevitably leads to insufficient support for the guide rail 3 in this area, resulting in deformation of the guide rail 3 during the injection molding process and a decrease in the overall product qualification rate.

[0026] To ensure the formation of the clearance area and rapid molding of the guide rail 3 during production, the guide rail 3 is typically 2mm thick. This results in a mold clearance span to guide rail 3 wall thickness ratio greater than 1:1. Under these conditions, after injection molding with the edge banding 5, the area on the guide rail 3 surface corresponding to the clearance area 40 is easily crushed, leading to surface defects and affecting the overall product yield. Based on repeated field tests, the optimal injection molding conditions are: to avoid deformation of the guide rail 3 under pressure, the mold clearance span to guide rail 3 wall thickness ratio should be 1:1, and the guide rail 3 wall thickness should be greater than or equal to 2.5mm. Increasing the guide rail 3 thickness to meet these optimal injection molding conditions would make it difficult to mold during production, and the excessive wall thickness would hinder surface shrinkage, ultimately causing deformation. Therefore, increasing the guide rail 3 wall thickness is not a viable solution to these problems.

[0027] Based on this, the solution is to adjust the edge-sealing injection mold to address the problem that the guide rail 3 is prone to deformation due to the setting of the avoidance area, which in turn affects the product qualification rate of the assembly.

[0028] Please refer to Figures 2-4 An injection mold includes a base 1, a guide assembly 2, and an edge-sealing injection molding mechanism 4 for connecting a guide rail 3 and an edge-sealing device. The guide rail 3 has a mudguard hook 32 in its inner cavity, forming a mudguard groove 31 with the inner wall of the guide rail 3. The edge-sealing injection molding mechanism 4 includes a first sliding assembly 41 and a second sliding assembly 42 slidably connected to the first sliding assembly 41. When the first sliding assembly 41 and the second sliding assembly 42 are closed, an injection part 43 for supporting the guide rail 3 is formed. The upper surface of the injection part 43 has an injection groove 431, and the injection groove 431 has a clearance groove 432 that matches the mudguard hook 32. A clearance gap is formed between the clearance groove 432 and the mudguard hook 32. The area corresponding to the mudguard groove 31 is embedded in the mudguard groove 31, which provides sufficient support for the guide rail 3; there is an inclined contact surface 44 between the first sliding component 41 and the second sliding component 42, so that when the first sliding component 41 and the second sliding component 42 slide relative to each other and gradually separate, the clearance groove 432 gradually sinks relative to the second sliding component 42; the guide component 2 and the edge-sealing injection molding mechanism 4 are both mounted on the base 1, and the guide component 2 is located at both ends of the edge-sealing injection molding mechanism 4 in the length direction and abuts against the edge-sealing injection molding mechanism 4, so that the second sliding component 42 of the edge-sealing injection molding mechanism 4 can move along the guide component 2, thereby allowing the guide component 2 to limit the movement of the second sliding component 42.

[0029] It is understandable that the injection molding part 43, which provides support for the guide rail 3 and the edge, is formed by the first sliding component 41 and the second sliding component 42. Since the first sliding component 41 and the second sliding component 42 can slide relative to each other, when the first sliding component 41 and the second sliding component 42 slide relative to each other and gradually separate, the first sliding component 41 will gradually sink relative to the second sliding component 42, and the inner cavity of the guide rail 3 will gradually separate from the second sliding component 42 until the second sliding component 42 is completely separated from the guide rail 3. At this time, the space for relative movement between the guide rail 3 and the first sliding component 41 increases, thereby enabling rapid demolding and mold insertion. On this basis, a clearance groove 432 matching the mudguard hook 32 is provided, and the clearance groove 432 and the mudguard hook 32 form a small clearance area. This provides clearance space for the mudguard hook 32 during injection molding and also supports the mudguard hook 32 during the injection molding process, preventing the guide rail 3 from being deformed due to pressure in the clearance area. This invention enables rapid mold entry and demolding of the guide rail 3, while providing good support for the guide rail 3 in the clearance area, preventing deformation under pressure and improving the yield rate of the assembled product. In conjunction with the guide component 2, it limits the sliding of the second sliding component 42, improving its sliding stability and ensuring that the second sliding component 42 does not exert any pulling force on the guide rail 3 during demolding.

[0030] In some embodiments, the clearance formed between the clearance groove 432 and the mudguard hook 32 is less than or equal to 0.2 mm and greater than 0 mm, which ensures that the guide rail 3 is well supported during injection molding and avoids excessive deformation of the guide rail 3 under pressure due to an excessively large clearance. Optionally, the size of the clearance is 0.05 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, or 0.19 mm.

[0031] In some embodiments, the clearance groove 432 has a first inclined surface 4321 and a second inclined surface 4322, and the first inclined surface 4321 and the second inclined surface 4322 form an angle of less than 90°. Optionally, the angle is 60° to 75°, and preferably, the angle is 74°, 73°, 72°, 71°, 70°, 69°, 68°, 67°, 66° or 65°. The first inclined surface 4321, the second inclined surface 4322 and the angle are set according to the profile of the mudguard hook 32.

[0032] In some embodiments, the first sliding component 41 includes an upper slider 411 and a linkage component 412; the clearance groove 432 and the injection groove 431 are both located on the top of the upper slider 411, the slider is slidably connected to the injection end of the second sliding component 42, the upper slider 411 is drivenly connected to the driving end of the second sliding component 42 through the linkage component 412, and the linkage component 412 can move relative to the upper slider 411 with the second sliding component 42. A linkage component 412 is respectively provided at both ends of the upper slider 411 along its length.

[0033] In some embodiments, the linkage assembly 412 includes a reset member 4121 and a transmission limiting member 4122 coaxially disposed with the reset member 4121. Both ends of the reset member 4121 are connected to the upper slider 411 and the second sliding assembly 42, respectively, and one end of the transmission limiting member 4122 passes through the reset member 4121 and is connected to the second sliding assembly 42. The upper slider 411 has a sliding channel 4123 for sliding the other end of the transmission limiting member 4122, and the other end of the transmission limiting member 4122 can abut against the end of the sliding channel 4123 near the reset member 4121 in the length direction. Preferably, the transmission limiting member 4122 is a bolt, and the transmission limiting member 4122 is inclined relative to the horizontal plane, and the inclination angle of the transmission limiting member 4122 is equal to the inclination angle between the contact surface 44 and the horizontal plane. In some embodiments, the contact surfaces 44 of the first sliding component 41 and the second sliding component 42 gradually sink in a direction away from the injection molding portion 43 and gradually closer to the injection molding portion 43, such that when the second sliding component 42 moves in a direction away from the injection molding portion 43, the first sliding component 41 can gradually sink along the contact surface 44. Further, the angle between the contact surface 44 and the horizontal plane is 2° to 8°. Preferably, the angle is 3°, 4°, 5°, 6°, or 7°.

[0034] The sliding channel 4123 guides the transmission limiting member 4122. When the second sliding assembly 42 retracts to its position, the transmission limiting member 4122 drives the upper slider 411 to move away from the guide rail 3, allowing the upper slider 411 to be completely pulled out of the guide rail 3. The reset member 4121 limits the movement of the upper slider 411 during the retraction of the second sliding assembly 42, preventing horizontal movement of the upper slider 411 and thus avoiding damage to the guide rail 3.

[0035] In some embodiments, the second sliding assembly 42 includes a lower slider 421, a limiting block 422, and a driving member 423. The lower slider 421 is slidably connected to the upper slider 411, and the lower slider 421 is driven by the limiting block 422 to the linkage assembly 412, which in turn is driven by the driving member 423. The driving member 423 is a cylinder, push rod, or other driving mechanism capable of driving the lower slider 421 to move linearly. Because the contact surface 44 between the upper slider 411 and the lower slider 421 is inclined, the driving member 423 and the limiting block 422 are used to drive the lower slider 421 to move away from the guide rail 3, while the upper slider 411 is limited in the horizontal direction, causing the upper slider 411 to gradually sink relative to the lower slider 421. This causes the clearance groove 432 to separate from the mudguard hook 32. As the lower slider 421 continues to retract, the upper slider 411 is driven by the transmission limiting member 4122 and completely extracted from the inner cavity of the guide rail 3, achieving rapid demolding. The limiting block 422 is quasi-right-angled in the projection area of ​​the lower slider 421 along its length, so as to drive the upper slider 411 and the lower slider 421 to move relative to each other in the width direction of the lower slider 421.

[0036] In some embodiments, the upper slider 411 and the lower slider 421 are slidably connected by a dovetail tenon 4211 and a dovetail groove 4111. At least two sets of dovetail grooves 4111 and dovetail tenons 4211 are provided along the length of the upper slider 411 and the lower slider 421. Specifically, the dovetail groove 4111 is located at the bottom of the upper slider 411, and the dovetail tenon 4211 is located at the top of the lower slider 421. Furthermore, the contact surface 44 between the upper slider 411 and the lower slider 421 is arc-shaped along the length of the lower slider 421 to stabilize the upper slider 411 and the lower slider 421 in that direction.

[0037] Reference Figure 2 The first embodiment of the present invention is as follows:

[0038] An injection mold includes a base 1, a guide component 2, and an edge-binding injection mechanism 4 as described in Embodiment 1. The guide component 2 and the edge-binding injection mechanism 4 are both mounted on the base 1, and the guide component 2 is located at both ends of the edge-binding injection mechanism 4 along its length and abuts against the edge-binding injection mechanism 4, so that the second sliding component 42 of the edge-binding injection mechanism 4 can move along the guide component 2.

[0039] Reference Figures 2-4 Embodiment two of the present invention is as follows:

[0040] An edge-sealing injection molding mechanism 4 is used to connect a guide rail 3 and an edge. The inner cavity of the guide rail 3 is provided with a mudguard hook 32. The mechanism includes a first sliding component 41 and a second sliding component 42 that can be slidably connected to the first sliding component 41. When the first sliding component 41 and the second sliding component 42 are molded together, they form an injection part 43 for supporting the guide rail 3. The upper surface of the injection part 43 has an injection groove 431. The injection groove 431 is provided with a clearance groove 432 that matches the mudguard hook 32, and a clearance gap is formed between the clearance groove 432 and the mudguard hook 32. The first sliding component 41 and the second sliding component 42 have an inclined contact surface 44, so that when the first sliding component 41 and the second sliding component 42 slide relative to each other and gradually separate, the clearance groove 432 gradually sinks relative to the second sliding component 42.

[0041] In this embodiment, the clearance between the clearance groove 432 and the mudguard hook 32 is less than or equal to 0.2 mm.

[0042] In this embodiment, the clearance groove 432 has a first inclined surface 4321 and a second inclined surface 4322, and the first inclined surface 4321 and the second inclined surface 4322 form an angle of less than 90°. The size of the clearance refers to the distance between the first inclined surface 4321 and / or the second inclined surface 4322 and the inner wall opposite to the clearance groove 432. In other equivalent embodiments, the distance between the first inclined surface 4321 and the inner wall of the corresponding clearance groove 432 may be equal to or unequal to the distance between the second inclined surface 4322 and the inner wall of the corresponding clearance groove 432.

[0043] In this embodiment, the first sliding component 41 includes an upper slider 411 and a linkage component 412; the upper slider 411 is slidably connected to the injection end of the second sliding component 42, the upper slider 411 is connected to the driving end of the second sliding component 42 through the linkage component 412, and the linkage component 412 can move relative to the upper slider 411 with the second sliding component 42.

[0044] In this embodiment, the second sliding component 42 includes a lower slider 421, a limiting block 422, and a driving component 423; the lower slider 421 is slidably connected to the upper slider 411, the lower slider 421 is connected to the linkage component 412 through the limiting block 422, and the linkage component 412 is connected to the driving component 423.

[0045] In this embodiment, the upper slider 411 and the lower slider 421 are slidably connected by a dovetail tenon 4211 and a dovetail groove 4111. At least two sets of dovetail grooves 4111 and dovetail tenons 4211 are provided in the length direction of the lower slider 421.

[0046] In this embodiment, the linkage component 412 includes a reset member 4121 and a transmission limiting member 4122 coaxially arranged with the reset member 4121. Both ends of the reset member 4121 are connected to the upper slider 411 and the second sliding component 42, respectively, and one end of the transmission limiting member 4122 passes through the reset member 4121 and connects to the second sliding component 42. The upper slider 411 has a sliding channel 4123 for sliding the other end of the transmission limiting member 4122, and the other end of the transmission limiting member 4122 can abut against the end of the sliding channel 4123 near the reset member 4121 in the length direction. Preferably, the transmission limiting member 4122 is a bolt, and the reset member 4121 is a compression spring.

[0047] In this embodiment, the contact surface 44 of the first sliding component 41 and the second sliding component 42 gradually sinks in a direction away from the injection molding part 43 and gradually approaches the injection molding part 43, so that when the second sliding component 42 moves in a direction away from the injection molding part 43, the first sliding component 41 can gradually sink along the contact surface 44, and the angle between the contact surface 44 and the horizontal plane is 2° to 8°. Preferably, the angle is 3°, 4°, 5°, 6° or 7°.

[0048] The working principle of this invention is as follows:

[0049] The driving component 423 drives the lower slider 421 to move away from the injection part 43, so that the injection part 43 formed by the upper slider 411 and the lower slider 421 gradually separates, and the guide rail 3 is placed on the upper surface of the injection part 43, so that the mudguard hook 32 is embedded in the clearance groove 432. The driving component 423 drives the lower slider 421 to move closer to the guide rail 3. Under the drive of the lower slider 421, the upper slider 411 and the guide rail 3 are gradually lifted along the contact surface 44 between them until the lower slider 421 is embedded in the guide rail 3 and forms a complete injection part 43 with the upper slider 411. The injection part 43 opens the guide rail 3 and performs edge molding 5.

[0050] After injection molding is completed and the mold is opened, the drive component 423 drives the lower slider 421 to move away from the guide rail 3. During this process, due to the pressure of the reset component 4121, the upper slider 411 remains stationary in the horizontal direction and gradually sinks relative to the lower slider 421 along the contact surface 44. Under the drive of the limit block 422, the transmission limit component 4122 also moves away from the guide rail 3 relative to the sliding channel 4123 until the end of the transmission limit component 4122 abuts against the end of the sliding channel 4123 away from the guide rail 3. The drive component 423 continues to drive the upper slider 411 to move through the transmission limit component 4122. At this time, the top of the upper slider 411 is lower than the lower end of the mudguard hook 32 of the guide rail 3, that is, the clearance groove 432 and the mudguard hook 32 are completely separated. At this time, the guide rail 3 and the edge assembly are connected, which can realize rapid demolding.

[0051] In summary, the edge-wrapping injection molding mechanism and mold assembly provided by the present invention adopts a relative sliding method between the upper and lower sliders to ensure rapid demolding and rapid mold entry of the guide rail. At the same time, the cooperation between the upper and lower sliders can reduce the size of the clearance area, so that the clearance groove supports the guide rail and prevents the guide rail from being crushed due to insufficient support during the edge-wrapping injection molding process, thereby improving the product qualification rate.

[0052] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A trim-in-place mechanism for connecting a rail and a trim, the inner cavity of the rail being provided with a mud defying barb, characterized in that, The first sliding assembly and the second sliding assembly are relatively slidably connected; The first sliding assembly and the second sliding assembly form an injection molding part for supporting the guide rail when they are combined, the upper surface of the injection molding part has an injection molding groove, the injection molding groove is provided with a clearance groove matched with the mud hook, and the clearance gap between the clearance groove and the mud hook is formed. The contact surface between the first sliding assembly and the second sliding assembly is obliquely arranged, so that when the first sliding assembly and the second sliding assembly are relatively slid and gradually separated, the clearance groove gradually sinks relative to the second sliding assembly; the clearance gap between the clearance groove and the mud hook is less than or equal to 0.2mm.

2. A wrap-around injection molding mechanism according to claim 1, wherein The clearance groove has a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface form an included angle less than 90°.

3. The mechanism according to claim 1, wherein The first sliding assembly includes an upper sliding block and a linkage assembly. The upper sliding block is slidably connected with the injection molding end of the second sliding assembly, the upper sliding block is drivingly connected with the driving end of the second sliding assembly through the linkage assembly, and the linkage assembly can move relative to the upper sliding block with the second sliding assembly.

4. A wrap-around injection molding mechanism according to claim 3, wherein The second sliding assembly includes a lower sliding block, a limiting block and a driving member. The lower sliding block is slidably connected with the upper sliding block, the lower sliding block is drivingly connected with the linkage assembly through the limiting block, and the linkage assembly is drivingly connected with the driving member.

5. A wrap-around injection molding mechanism according to claim 4, wherein The upper sliding block and the lower sliding block are slidably connected through a dovetail joint and a dovetail groove.

6. A wrap-around injection molding mechanism according to claim 3, wherein The linkage assembly includes a reset member and a transmission limiting member coaxially arranged with the reset member. Both ends of the reset member are connected with the upper sliding block and the second sliding assembly respectively, and one end of the transmission limiting member passes through the reset member and is connected with the second sliding assembly. The upper sliding block is provided with a sliding channel for the other end of the transmission limiting member to slide, and the other end of the transmission limiting member can abut against one end of the sliding channel close to the reset member in the length direction.

7. A wrap-around injection molding mechanism according to claim 6, wherein The transmission limiting member is a bolt.

8. The mechanism of claim 1, wherein The included angle between the contact surface and the horizontal plane is 2°-8°.

9. An injection mold characterized in that, The edge injection molding mechanism comprises a base, a guide assembly and the edge injection molding mechanism as claimed in any one of claims 1-8. The guide assembly and the edge injection molding mechanism are both arranged on the base, and the guide assembly is arranged at both ends of the edge injection molding mechanism in the length direction and abuts against the edge injection molding mechanism, so that the second sliding assembly of the edge injection molding mechanism can move along the guide assembly.

Images