A two-stage inclined top and injection mold thereof

Abstract

The application relates to the field of mold opening technology, in particular to a two-section inclined ejector and an injection mold, wherein the inclined ejector comprises an inclined ejector rod, a demolding ejector rod and a driving ejector rod; one end of the inclined ejector rod is provided with a forming block, and the other end of the inclined ejector rod is provided with a backing plate; the demolding ejector rod is used for abutting against a movable mold core, the demolding ejector rod is located on the side of the backing plate facing the inclined ejector rod, the demolding ejector rod is arranged in abutment and relative sliding with the backing plate, the demolding ejector rod is parallel to the driving ejector rod, and the demolding ejector rod is arranged at an angle with the inclined ejector rod; the driving ejector rod is used for connecting a ejector pin plate, and the driving ejector rod is arranged in abutment and sliding on the outer wall of the side of the backing plate away from the demolding ejector rod. The injection mold applies the above inclined ejector. The application effectively optimizes the stability of ejection during mold opening and reduces the possibility of bending of the inclined ejector.

Description

Technical Field

[0001] This application relates to the field of mold making technology, and in particular to an injection mold with a two-stage inclined ejector. Background Technology

[0002] Injection molds are tools used in the injection molding process to manufacture products. Therefore, the structure of injection molds and their cavities are often adjusted to suit the plastic products being produced. In plastic products, depending on the product's needs, some openings such as holes and grooves may be perpendicular to or at an angle to the mold opening direction of the injection mold, preventing the mold from opening completely after injection molding.

[0003] To enable product molding via injection molding, injection molds often employ a slanted ejector structure. The opening direction of the ejector is perpendicular to or at an angle to the mold opening direction, allowing for lateral core pulling during mold opening and facilitating the process. In existing technology, to ensure smooth ejection and separation of the slanted ejector from the product during mold opening, one end of the ejector is typically connected to the ejector plate, with its length angled to the guide plate, allowing it to slide. The other end of the ejector inserts into the cavity within the fixed mold core, sliding relative to it. Guide blocks are typically placed within or on the fixed mold core itself to guide the ejector's movement and limit its bending.

[0004] However, in actual use, due to the need to provide space for the sliding of the angled ejector, cavities are often created in the fixed mold core and mold plate to accommodate the sliding of the angled ejector. When molding a product, the injection mold needs to inject molten plastic, which then solidifies within the cavity. Therefore, the temperature around the angled ejector is relatively high during use, which reduces its rigidity and elastic modulus. Simultaneously, the angled ejector and ejector plate are set at an angle, causing the angled ejector to bear a certain torque. This makes it prone to bending during mold opening, leading to jamming between the angled ejector and the molded product. Therefore, how to ensure stable ejection of the angled ejector and reduce jamming is a pressing problem that needs to be solved. Summary of the Invention

[0005] To optimize the stability of the angled ejector during mold opening, this application provides an angled ejector with two sections and its injection mold.

[0006] This application provides a two-stage inclined ejector and its injection mold, employing the following technical solution:

[0007] Firstly, this application provides a two-section sloping top, employing the following technical solution:

[0008] A two-section inclined ejector includes an inclined ejector rod, a demolding ejector rod, and a driving ejector rod. One end of the inclined ejector rod is provided with a forming block, and the other end of the inclined ejector rod is provided with a backing plate. The demolding ejector rod is used to abut against the moving mold core. The demolding ejector rod is located on the side of the backing plate facing the inclined ejector rod. The demolding ejector rod abuts against and slides relative to the backing plate. The demolding ejector rod is parallel to the driving ejector rod and is set at an angle to the inclined ejector rod. The driving ejector rod is used to connect to the ejector plate, and the driving ejector rod abuts against and slides on the outer wall of the backing plate on the side away from the demolding ejector rod.

[0009] By adopting the above technical solution, the inclined ejector, demolding ejector, and driving ejector are each slidably mounted on the fixed mold core along their own axial direction. The undercut or hole structure of the product is formed by the molding block on the inclined ejector. When the mold is opened after injection molding, the ejector plate will demold through the ejector pins. During this process, the driving ejector will be pushed to slide simultaneously. In this process, the driving ejector will push the inclined ejector to slide along the axial direction of the inclined ejector, and simultaneously drive the pad to slide away from the through-film ejector. The pad will push the demolding ejector to slide along the axial direction. Thus, the inclined ejector and the demolding ejector slide synchronously along the axial direction of the driving ejector. Since the inclined ejector and the demolding ejector are set at an angle, the inclined ejector will also move away from the demolding ejector. This completes the demolding of the undercut or side opening structure of the product. At the same time, the length of the inclined ejector and the demolding ejector is effectively reduced compared to the length of the inclined ejector in the prior art. This effectively reduces the possibility of the inclined ejector and the demolding ejector bending and getting stuck, thereby optimizing the stability during mold opening and ejection.

[0010] Meanwhile, during use, since the ejector pins and the angled ejector pins slide simultaneously by pushing them with the pad, the lengths of the angled ejector pins and the ejector pins are relatively close. This ensures that the angled ejector pins and the ejector pins are relatively uniformly affected by high temperatures. Furthermore, the simultaneous sliding by the pad ensures that the bending degree of the angled ejector pins and the ejector pins is relatively uniform, which can further reduce the impact of bending on mold opening and further reduce the possibility of jamming.

[0011] Optionally, the demolding direction of the molded block is parallel to the pad.

[0012] By adopting the above technical solution, the sliding direction of the inclined push rod is parallel to the pad plate. This will make the sliding direction of the molding block relative to the product parallel to the pad plate, thereby further reducing the possibility of jamming when the molding block slides relative to the product.

[0013] Optionally, a demolding ejector pin abuts against one end of the pad plate and a demolding pad block is formed thereon, the demolding pad block abutting against and slidingly disposed on the pad plate.

[0014] By adopting the above technical solution, the demolding pad can further increase the contact area with the pad plate to balance the torque applied to the demolding ejector pin due to resistance during the sliding process, and further optimize the stability during use.

[0015] Optionally, a clearance groove is provided on the inner side of the connection between the pad and the inclined ejector rod, and the clearance groove is used to avoid the ejector rod.

[0016] By adopting the above technical solution, when the ejector pin slides along the pad, it can slide into the relief groove and abut against the inner wall of the relief groove to restrict the sliding of the ejector pin. This reduces the possibility of wear caused by interference between the transition surface of the inclined ejector pin and the pad plate during the sliding process of the ejector pin, thereby further optimizing the stability during use and reducing the possibility of jamming.

[0017] Optionally, the inclined top rod is connected to the pad plate via an inclined top connector. The inclined top connector includes an inclined top connecting column and an inclined top connecting rod. The inclined top connecting column has a frustum-shaped structure, and its large end is fixedly connected to the inclined top rod. The pad plate has a connecting conical hole with a depth greater than the length of the inclined top connecting column. The inclined top connecting column is inserted into the connecting conical hole. The inclined top connecting rod passes through the connecting conical hole and the inclined top connecting column, and is inserted and threadedly connected to the pad plate. The inclined top connecting rod is parallel to the pad plate.

[0018] By adopting the above technical solution, when in use, since the inclined ejector rod needs to pass through the fixed mold core, the inclined ejector connecting column is inserted into the connecting cone hole and fixed by the inclined ejector connecting rod, the inclined ejector rod and the pad plate can be detachably connected for easy disassembly and assembly. At the same time, since the inclined ejector connecting rod is parallel to the pad plate, the influence on the sliding of the pad plate relative to the demolding ejector rod and the driving ejector rod can be effectively reduced.

[0019] Optionally, the end of the inclined top connecting rod connected to the inclined top connecting column has a frustum-shaped structure, and the frustum-shaped end of the inclined top connecting rod is threaded, and the frustum-shaped end of the inclined top connecting rod is threaded to the inclined top connecting column.

[0020] By adopting the above technical solution, the inclined top connecting rod can be relatively tightly connected to the inclined top connecting column, so as to reduce the impact on stability caused by the detachable connection between the inclined top rod and the pad. At the same time, the axial and radial displacement of the inclined top connecting column can be simultaneously restricted by the tapered end of the inclined top connecting rod, so as to achieve a stable connection.

[0021] Optionally, a padding layer is provided in the gap between the inner wall of the connecting conical hole and the inclined top connecting column, as well as in the gap between the periphery of the inclined top connecting rod and the pad plate. The padding layer is formed by filling the connecting conical hole with solder and melting it after being squeezed by the inclined top connecting rod.

[0022] By adopting the above technical solution, since the end of the inclined top connecting rod and the rod part need to be threaded to the inclined top connecting column and the pad respectively, it is necessary to ensure that the inclined top connecting rod, the pad, and the inclined top connecting column have a clearance fit when not tightly pressed. By filling the gap with the pad, the inclined top connecting rod, the inclined top connecting column, and the pad can be more tightly connected, reducing the possibility of wear or shaking caused by force during use.

[0023] Optionally, the demolding ejector and the driving ejector are provided with a lubrication assembly at one end of the pad. The lubrication assembly includes a lubrication tube, an extruder disposed inside the lubrication tube, and a filling tube. One end of the lubrication tube is fixedly connected to the demolding ejector or the driving ejector, and the other end of the lubrication tube is provided with an abutment seat that abuts against the pad. The abutment seat has a lubrication hole for lubricant to pass through. The filling tube is filled with lubricant and is disposed inside the lubrication tube. The extruder is used to squeeze the lubricant from the filling tube to the space between the abutment seat and the pad when the temperature rises.

[0024] By adopting the above technical solution, during use, the internal temperature of the fixed mold core rises during injection molding. At this time, the filling tube is squeezed by the extruder, causing the lubricant inside the filling tube to be squeezed out between the abutment seat and the pad. This allows for timely lubrication when the drive ejector pushes the inclined ejector and the demolding ejector to slide through the pad after injection molding. Compared with directly applying lubricant, this effectively reduces the amount of debris caused by lubricant solidification due to high temperature. Furthermore, compared with directly applying lubricant, where the lubrication effect decreases over time, extruding lubricant before each injection molding cycle effectively optimizes lubrication efficiency.

[0025] Optionally, the extrusion element is a spring made of shape memory metal, and the extrusion element is located at the end of the filling tube away from the abutment seat, and the shape memory temperature of the extrusion element is lower than the injection molding temperature.

[0026] By adopting the above technical solution, the temperature inside the fixed mold core will rise during injection molding, causing the extruded part to return to its original shape and squeeze the filling tube, thus extruding the lubricant. At the same time, after injection molding is completed, the extruded part will return to its compressed state to achieve reciprocating squeezing of the filling tube to achieve lubrication after injection molding. This can effectively improve the utilization efficiency of the lubricant and reduce the possibility of the lubricant still being squeezed out when not in use.

[0027] Secondly, this application provides an injection mold with a two-stage inclined ejector, employing the following technical solution:

[0028] An injection mold that uses the aforementioned two-stage inclined ejector.

[0029] By adopting the above technical solutions, the stability during mold opening can be effectively optimized, and the possibility of jamming due to bending of the inclined ejector caused by high temperature can be reduced.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. During injection molding, the inclined ejector pin, the demolding ejector pin, and the driving ejector pin are each slidably mounted on the fixed mold core along their own axes. The undercut or hole structure of the product is formed by the molding block on the inclined ejector pin. When the mold is opened after injection molding, the ejector plate will demold through the ejector pin. During this process, the driving ejector pin will be pushed to slide simultaneously. In this process, the driving ejector pin will push the inclined ejector pin to slide along the axial direction of the inclined ejector pin, and simultaneously drive the pad plate to slide away from the through ejector pin. The pad plate will push the demolding ejector pin to slide along the axial direction. Thus, the inclined ejector pin and the demolding ejector pin slide synchronously along the axial direction of the driving ejector pin. Since the inclined ejector pin and the demolding ejector pin are set at an angle, the inclined ejector pin will also move away from the demolding ejector pin. This completes the demolding of the undercut or side opening structure of the product. At the same time, the length of the inclined ejector pin and the demolding ejector pin is effectively reduced compared to the length of the inclined ejector pin in the prior art. This effectively reduces the possibility of the inclined ejector pin and the demolding ejector pin bending and getting stuck, thereby optimizing the stability during mold opening and ejection.

[0032] 2. During injection molding, the molten injection material raises the internal temperature of the mold core. This causes the extruder to expand and squeeze the filler tube, forcing the lubricant out between the abutment and the backing plate. This ensures timely lubrication as the drive ejector pushes the angled ejector and demolding ejector through the backing plate after injection molding. Compared to directly applying lubricant, this effectively reduces the amount of solidified debris caused by high temperatures. Furthermore, unlike directly applying lubricant, which reduces lubrication effectiveness over time, extruding lubricant before each injection effectively optimizes lubrication efficiency. This reduces the increased resistance to the angled ejector sliding relative to the drive and demolding ejector due to the backing plate being abutted by the drive and demolding ejector, preventing bending of the ejector and further optimizing mold opening stability. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0034] Figure 2 This is a schematic diagram of the demolding ejector pin in Embodiment 1 of this application.

[0035] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0036] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA in the middle.

[0037] Figure 5 yes Figure 4 A magnified structural diagram of part B.

[0038] Figure 6 This is a structural schematic diagram of Embodiment 3 of this application.

[0039] Figure 7 This is a partial cross-sectional structural diagram of Embodiment 3 of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Angled ejector pin; 10. Clearance groove; 11. Molding block; 12. Pad plate; 121. Connecting cone hole; 13. Angled ejector connector; 131. Angled ejector connecting column; 132. Angled ejector connecting rod; 133. Fixed cone hole; 14. Pad layer; 2. Demolding ejector pin; 21. Pad block; 3. Drive ejector pin; 41. Moving mold core; 42. Ejector plate; 43. Fixed mold core; 431. Mounting groove; 432. Ejector pin hole; 433. Demolding hole; 44. Fixed mounting plate; 45. Pad; 451. Guide pillar; 46. Fixed template; 47. Moving template; 48. Moving mounting plate; 5. Lubrication assembly; 51. Lubrication pipe; 52. Extrusion part; 53. Filling pipe; 54. Abutment seat; 541. Lubrication hole; 542. Restriction bolt. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a sloping roof with two sections.

[0043] Example 1

[0044] Reference Figure 1 A two-stage inclined ejector includes an inclined ejector rod 1, a demolding ejector rod 2, and a driving ejector rod 3. The inclined ejector rod 1 is used to form the undercut or hole structure of the product. The demolding ejector rod 2 is used to push the moving mold core 41 (not shown in the figure) when the mold is opened. The driving ejector rod 3 is used to connect the ejector plate 42 (not shown in the figure), and the driving ejector rod 3 is used to simultaneously push the inclined ejector rod 1 and the demolding ejector rod 2 to slide when the mold is opened.

[0045] Reference Figure 1 and Figure 2Specifically, one end of the inclined ejector rod 1 is fixedly connected to a forming block 11. One or more forming blocks 11 can be provided, depending on the desired structure. In this embodiment, only one forming block 11 is provided, and the forming block 11 is integrally formed with the inclined ejector rod 1. The other end of the inclined ejector rod 1 is fixedly connected to a pad 12, the surface of which forms an obtuse angle with the inclined ejector rod 1. The demolding direction of the forming block 11 is parallel to the pad 12, and the forming block 11 is parallel to the sliding direction of the inclined ejector rod 1 relative to the demolding ejector rod 2. This allows the forming block 11 to gradually detach from the already formed product as the inclined ejector rod 1 slides relative to the demolding ejector rod 2, thus completing the mold opening.

[0046] The ejector pin 2 is parallel to the drive ejector pin 3, and is located on the side of the pad 12 facing the inclined ejector pin 1. The ejector pin 2 is perpendicular to the pad 12, so that the ejector pin 2 and the inclined ejector pin 1 are set at an angle. At the same time, the ejector pin 2 abuts against and slides on the pad 12, so that the inclined ejector pin 1 and the ejector pin 2 can slide towards each other or away from each other.

[0047] Reference Figure 1 and Figure 2 Furthermore, a demolding ejector pin 2 has a demolding pad 21 formed at one end abutting against the pad 12, and the area of ​​the demolding pad 21 projected along the axial direction of the demolding ejector pin 2 is larger than the cross-sectional area of ​​the demolding ejector pin 2. The demolding ejector pin 2 is slidably disposed on the pad 12 via the demolding pad 21 to optimize the stability of the pad 12 when sliding relative to the demolding ejector pin 2, and to balance the torque generated by the friction between the pad 12 and the demolding pad 21 by the demolding pad 21 abutting against the pad 12.

[0048] Reference Figure 1 and Figure 2 An allowance groove 10 is provided on the inner side of the connection between the inclined ejector rod 1 and the pad 12. The allowance groove 10 is adapted to the demolding pad 21 so that when the demolding ejector rod 2 slides toward the inclined ejector rod 1, it can slide into the allowance groove 10. This reduces the possibility that the demolding ejector rod 2 may get stuck due to wear between the connection part and the demolding pad 21 caused by the obtuse angle between the inclined ejector rod 1 and the pad 12. It can also be used to limit the sliding stroke of the demolding ejector rod 2 relative to the inclined ejector rod 1.

[0049] The drive ejector 3 is located on the side of the pad 12 away from the demolding ejector 2, and the drive ejector 3 abuts against and slides on the pad 12. The drive ejector 3 is located between the demolding ejector 2 and the inclined ejector 1, so that when the drive ejector 3 pushes the pad 12, causing the inclined ejector 1 and the demolding ejector 2 to slide, the contact point between the drive ejector 3 and the pad 12 is located between the inclined ejector 1 and the demolding ejector 2. This allows the pad 12 to simultaneously push the inclined ejector 1 and the demolding ejector 2 to slide, while also balancing the force on the pad 12 through the demolding ejector 2 abutting against the pad 12, thereby reducing the torque generated by the pad 12. This further reduces the possibility of the inclined ejector 1 bending during the mold opening process. At the same time, since the inclined ejector 1 does not need to be connected to the ejector plate 42, the length of the inclined ejector 1 can be effectively reduced, thereby reducing the possibility of bending due to high temperature.

[0050] Furthermore, even if bending occurs, the inclined ejector pin 1 and the demolding ejector pin 2 are pushed synchronously by the pad plate 12, making their lengths relatively close. At this time, the bending of the inclined ejector pin 1 and the demolding ejector pin 2 will be relatively synchronous, so that the solidified product will detach from the fixed mold core 43 and the moving mold core 41 will detach from the fixed mold core 43 at the time of mold opening, which can effectively reduce the possibility of jamming.

[0051] Example 2

[0052] Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that the inclined top rod 1 is connected to the pad plate 12 through the inclined top connector 13.

[0053] Reference Figure 4 and Figure 5 The inclined top connector 13 includes an inclined top connecting post 131 and an inclined top connecting rod 132. The inclined top connecting post 131 has a frustum-shaped structure, and its large end is fixedly connected to the end face of the inclined top rod 1 facing the pad 12. The cross-section of the inclined top connecting post 131 is polygonal. The pad 12 is bent towards the inclined top rod 1 at the end connected to it.

[0054] The pad 12 has a connecting cone hole 121 with a depth greater than the length of the inclined top connecting post 131, and the connecting cone hole 121 is set with the larger end facing the opening of the inclined top rod 1. The inclined top connecting post 131 is inserted into the connecting cone hole 121 on the pad 12, and the inclined top connecting post 131 abuts against the inner wall of the connecting cone hole 121.

[0055] Reference Figure 4 and Figure 5The inclined ejector connecting rod 132 is a screw and parallel to the pad 12 to reduce the possibility of the inclined ejector connecting rod 132 interfering with the sliding of the demolding ejector 2 and the driving ejector 3 relative to the pad 12. At the same time, the inclined ejector connecting rod 132 is inserted and threaded to the pad 12, and the inclined ejector connecting rod 132 passes through the connecting tapered hole 121 and the inclined ejector connecting post 131, so as to fix the inclined ejector connecting post 131 to the pad 12 while reducing the possibility of interfering with the sliding of the demolding ejector 2 and the driving ejector 3.

[0056] Reference Figure 4 and Figure 5 Specifically, the inclined connecting rod 132, which passes through the end of the inclined connecting post 131, has a frustum-shaped structure with a smaller end. The outer wall of the frustum-shaped structure of the inclined connecting rod 132 is also threaded, and the inclined connecting post 131 has a fixing conical hole 133 corresponding to the frustum-shaped end of the inclined connecting rod 132. The inclined connecting rod 132 passes through the fixing conical hole 133 and is threaded to the inner wall of the fixing conical hole 133, so that the connection between the inclined connecting rod 132 and the inclined connecting post 131 is relatively tighter. The inclined connecting rod 132 is threaded to the pad 12, so that the connection between the inclined connecting post 131, the inclined connecting rod 132 and the pad 12 is relatively tighter, thereby optimizing the stability during use. The inclined top connecting rod 132 is threaded to the pad 12 with a clearance fit, so that when the inclined top connecting rod 132 is threaded to the fixed tapered hole 133, the inclined top connecting rod 132 can make certain adaptive adjustments.

[0057] In addition, since the inclined top connecting rod 132 and the pad 12 are clearance fit, in order to further optimize the stability during use, the gap between the inner wall of the connecting cone hole 121 and the inclined top connecting rod 131, the inner wall between the inclined top connecting rod 132 and the fixed cone hole 133, and the space between the periphery of the inclined top connecting rod 132 and the pad 12 are all filled with pads 14.

[0058] Reference Figure 4 and Figure 5The pad 14 is formed by filling the interior of the connecting tapered hole 121, the fixed tapered hole 133, and the pad 12 with solder. Then, the inclined top connecting post 131 is inserted into the connecting tapered hole 121. Subsequently, the inclined top connecting rod 132 is inserted and threadedly connected to the pad 12 and the inclined top connecting post 131. The solder fills the gap between the inclined top connecting post 131 and the inner wall of the connecting tapered hole 121, the gap between the inclined top connecting rod 132 and the inner wall of the fixed tapered hole 133, and the gap between the inclined top connecting rod 132 and the pad 12. Finally, the pad 14 is formed by high-temperature melting. This further makes the inclined top connecting post 131, the inclined top connecting rod 132 and the pad 12 more tightly connected, while also allowing the straight thread and tapered thread on the inclined top connecting rod 132 to be threadedly connected to the pad 12 and the inclined top connecting post 131, respectively. The melting point of the solder is higher than the injection molding temperature, and lower than the melting points of the inclined top connecting column 131, the inclined top connecting rod 132 and the pad 12. This reduces the impact of injection molding on the pad 14, and the solder welding can be completed without melting the inclined top connecting column 131, the inclined top connecting rod 132 and the pad 12.

[0059] Reference Figure 4 and Figure 5 Furthermore, since the pad 12 slides relative to both the ejector pin 2 and the drive pin 3 during use, causing the pad 12 to be clamped by the ejector pin 2 and the drive pin 3, in order to reduce the wear on the pad 12 and the resistance encountered by the ejector pin 2 and the drive pin 3 during sliding, lubrication components 5 are provided at the opposing ends of the ejector pin 2 and the drive pin 3 to lubricate the sliding of the ejector pin 2 relative to the pad 12 and the drive pin 3 relative to the pad 12, respectively. Both the ejector pin 2 and the drive pin 3 abut against the pad 12 through the connected lubrication components 5.

[0060] Specifically, the lubrication assembly 5 includes a lubrication pipe 51, an extrusion member 52, and a filling pipe 53. The lubrication pipes 51 of the two lubrication assemblies 5 are coaxially fixedly connected to the demolding pads 21 on the drive ejector rod 3 and the demolding ejector rod 2, respectively, so that one of the lubrication pipes 51 is connected to the demolding ejector rod 2 through the demolding pad 21. Furthermore, the end of the lubrication pipe 51 away from the demolding ejector rod 2 or the drive ejector rod 3 is detachably connected to an abutment seat 54, which abuts against and slides on the pad plate 12.

[0061] Reference Figure 4 and Figure 5 The filling tube 53 is filled with lubricant, and both the filling tube 53 and the extruder 52 are located inside the lubricating tube 51. The tube wall of the filling tube 53 facing the abutment seat 54 is made of a pressure-permeable membrane that allows lubricant to pass through, and the extruder 52 is located on the side of the filling tube 53 facing away from it. The extruder 52 is used to squeeze the lubricant in the filling tube 53 to the pad 12 when the temperature rises, that is, to squeeze the filling tube 53 during injection molding.

[0062] The extrusion part 52 is a spring made of shape memory metal, and the shape memory temperature of the extrusion part 52 is lower than the injection molding temperature, so that during injection molding, the extrusion part 52 will return to its original shape and squeeze the filling tube 53, so that the lubricant in the filling tube 53 will be squeezed out.

[0063] Of course, in other embodiments, the end of the filling tube 53 facing the abutment seat 54 is not closed and has several overflow ports, and the filling tube 53 is made of an elastic material, such as a rubber tube, to seal the overflow ports when not compressed. The extrusion member 52 is a spring or tab made of an expansion alloy to compress the filling tube 53 when heated and expanded.

[0064] Reference Figure 4 and Figure 5 The abutment seat 54 has a stepped shaft structure, and its small end has a tubular structure. The small end of the abutment seat 54 is inserted into and threadedly connected to the inner wall of the lubrication tube 51. The large end of the abutment seat 54 has a plate-like structure and has several lubrication holes 541 for allowing the extruded lubricant to contact and lubricate the pad 12. The large end of the abutment seat 54 abuts against and slides on the surface of the pad 12. To limit the rotation of the abutment seat 54 relative to the lubrication tube 51 during sliding, the lubrication tube 51 is provided with several limiting bolts 542 threadedly connected to the abutment seat 54 to limit the rotation of the abutment seat 54 relative to the lubrication tube 51 during use.

[0065] The implementation principle of Example 2 is as follows: During use, the injection mold is cooled by the cooling system when the product is injection molded. During injection, the temperature of the moving mold core 41 and the fixed mold core 43 will rise. During this process, the extruder 52 will expand and squeeze the filling tube 53, so that the lubricant in the filling tube 53 will be squeezed out and contact the pad 12 after passing through the abutment seat 54. This is used to lubricate the sliding between the abutment seat 54 and the pad 12, thereby reducing the wear of the pad 12 and reducing the resistance when the inclined ejector 1 slides relative to the demolding ejector 2 and the driving ejector 3.

[0066] Meanwhile, compared to directly applying lubricant or applying dry lubricant, the real-time extrusion method allows for sufficient lubrication as the contact seat 54 slides relative to the pad 12, achieving real-time lubrication before sliding. Furthermore, the temperature changes during the injection molding process allow for multiple extrusions of the lubricant, effectively improving lubrication efficiency and reducing the possibility of some lubricant failing to lubricate and instead drying out at high temperatures, forming impurities.

[0067] Finally, after the lubricant in the filling tube 53 is used up, simply remove the abutment 54 from the lubrication tube 51 and replace the filling tube 53. This can also effectively reduce the possibility of the lubricant coming into contact with other structures of the injection mold during the use and replacement of the lubricant, thereby reducing the impact on the injection molded product.

[0068] Example 3

[0069] This application also discloses an injection mold with a two-stage inclined top. (Refer to...) Figure 6 and Figure 7 The injection mold utilizes the angled ejector as described in Embodiment 1 or Embodiment 2, specifically as follows: The injection mold includes a fixed mounting plate 44, an ejector plate 42, a pad 45, a fixed template 46, a fixed mold core 43, a movable template 47, a movable mold core 41, a movable mounting plate 48, and the aforementioned angled ejector. The fixed mounting plate 44, ejector plate 42, pad 45, fixed template 46, fixed mold core 43, movable template 47, movable mold core 41, and movable mounting plate 48 are arranged sequentially.

[0070] There are two pads 45, and the ejector plate 42 is located between the two pads 45. The fixed mounting plate 44 and the moving template 47 are slidably connected to the pads 45 through multiple guide posts 451 passing through the fixed template 46. The guide posts 451 are fixedly connected to the pads 45 by bolts.

[0071] Reference Figure 6 and Figure 7 The end of the drive rod 3 away from the pad plate 12 passes through the fixed mold core 43 and the fixed mold plate 46 and is fixedly connected to the ejector plate 42. The ejector plate 42 is slidably connected to the fixed mounting plate 44 through a hydraulic cylinder (not shown in the figure) to drive the ejector plate 42 to slide, and the ejector pins on the ejector plate 42 complete the demolding.

[0072] The fixed mold core 43 is embedded in the fixed template 46 and fixed with bolts, and the movable mold core 41 is embedded in the movable template 47 and fixed with bolts. The movable template 47 is fixedly connected to the movable mounting plate 48 with bolts, and the fixed mounting plate 44, ejector plate 42, pad 45, fixed template 46, fixed mold core 43, movable template 47, movable mold core 41, and movable mounting plate 48 are parallel to each other.

[0073] Reference Figure 6 and Figure 7 Specifically, the fixed mold core 43 has an installation groove 431, which is set to face the fixed template 46. The drive ejector rod 3 passes through the fixed template 46 and extends into the installation groove 431, and the drive ejector rod 3 is perpendicular to the fixed template 46.

[0074] The fixed mold core 43 is also provided with an ejector pin hole 432 and a demolding hole 433, both of which are connected to the mounting groove 431. The demolding ejector pin 2 passes through the demolding hole 433, and the length direction of the demolding hole 433 is parallel to the drive ejector pin 3, so as to guide the axial sliding of the demolding ejector pin 2 while restricting the radial sliding of the demolding ejector pin 2. The demolding pad 21 is provided in the mounting groove 431 to restrict the demolding ejector pin 2 from disengaging from the fixed mold core 43.

[0075] Meanwhile, the inclined push rod 1 passes through the push rod hole 432, and the central axis of the push rod hole 432 is parallel to the inclined push rod 1. The inclined push rod 1 is slidably disposed in the push rod hole 432 to guide the sliding of the inclined push rod 1.

[0076] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sloping roof with two sections, characterized in that: It includes an inclined ejector pin (1), a demolding ejector pin (2), and a drive ejector pin (3); One end of the inclined push rod (1) is provided with a forming block (11), and the other end of the inclined push rod (1) is provided with a pad (12). The ejector pin (2) is used to abut against the moving mold core (41). The ejector pin (2) is located on the side of the pad (12) facing the inclined ejector pin (1). The ejector pin (2) abuts against and slides relative to the pad (12). The ejector pin (2) is parallel to the drive ejector pin (3). The ejector pin (2) and the inclined ejector pin (1) are set at an angle. The drive rod (3) is used to connect the ejector plate (42), and the drive rod (3) abuts against and slides on the outer wall of the pad (12) on the side away from the demolding ejector rod (2); The demolding ejector (2) and the driving ejector (3) are provided with a lubrication assembly (5) at one end of the pad (12). The lubrication assembly (5) includes a lubrication tube (51), an extruder (52) disposed in the lubrication tube (51), and a filling tube (53). One end of the lubrication tube (51) is fixedly connected to the demolding ejector (2) or the driving ejector (3). The other end of the lubrication tube (51) is provided with an abutment seat (54) abutting against the pad (12). The abutment seat (54) has a lubrication hole for the lubricant to pass through. The filling tube (53) is filled with lubricant and is disposed in the lubrication tube (51). The extruder (52) is used to squeeze the lubricant from the filling tube (53) to the space between the abutment seat (54) and the pad (12) when the temperature rises. The extrusion member (52) is a spring made of shape memory metal, and the extrusion member (52) is located at the end of the filling tube (53) away from the abutment seat (54). The shape memory temperature of the extrusion member (52) is lower than the injection molding temperature.

2. The inclined roof with two sections according to claim 1, characterized in that: The demolding direction of the molding block (11) is parallel to that of the pad (12).

3. A two-section sloping roof according to claim 1, characterized in that: The demolding ejector (2) has a demolding pad (21) formed at one end of the pad (12), and the demolding pad (21) abuts against and slides on the pad (12).

4. A two-section sloping roof according to claim 1, characterized in that: An avoidance groove (10) is provided on the inner side of the connection between the pad (12) and the inclined ejector (1), and the avoidance groove (10) is used to avoid the demolding ejector (2).

5. A two-section sloping roof according to claim 1, characterized in that: The inclined top rod (1) is connected to the pad plate (12) through the inclined top connector (13). The inclined top connector (13) includes an inclined top connecting column (131) and an inclined top connecting rod (132). The inclined top connecting column (131) has a frustum-shaped structure and the large end of the inclined top connecting column (131) is fixedly connected to the inclined top rod (1). The pad plate (12) has a connecting cone hole (121) with a depth greater than the length of the inclined top connecting column (131). The inclined top connecting column (131) is inserted into the connecting cone hole (121). The inclined top connecting rod (132) passes through the connecting cone hole (121) and the inclined top connecting column (131). The inclined top connecting rod (132) is inserted and threadedly connected to the pad plate (12). The inclined top connecting rod (132) is parallel to the pad plate (12).

6. A two-section sloping roof according to claim 5, characterized in that: The inclined top connecting rod (132) is connected to the end of the inclined top connecting column (131) in a frustum-shaped structure, and the frustum-shaped end of the inclined top connecting rod (132) is threaded, and the frustum-shaped end of the inclined top connecting rod (132) is threaded to the inclined top connecting column (131).

7. A two-section sloping roof according to claim 6, characterized in that: The gap between the inner wall of the connecting cone hole (121) and the inclined top connecting column (131) and the gap between the periphery of the inclined top connecting rod (132) and the pad plate (12) are provided with pads (14). The pads (14) are formed by filling the connecting cone hole (121) with solder and melting it after being squeezed by the inclined top connecting rod (132).

8. An injection mold, characterized in that: The application has a two-section sloping top as described in any one of claims 1-7.

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