Mechanism for adjusting length of inclined ejector rod on injection mold

Abstract

The invention provides an injection mold upper angle ejector rod length adjusting mechanism which comprises a mold foot, a mold core plate, a mold core fixing plate, an ejector pin bottom plate and an ejector pin face plate, an angle ejector fixing base is connected to the ejector pin bottom plate through an insert, a guide sliding groove is formed in the angle ejector fixing base, an angle ejector sliding block is installed in the guide sliding groove, and the ejector pin face plate is connected to the ejector pin face plate. The upper end of the angle ejector rod penetrates through the core plate and then is connected with the angle ejector block, the bottom of the angle ejector rod is arranged in the angle ejector rod mounting hole, the threaded hole is internally in threaded connection with a threaded sleeve, the bottom face of the angle ejector rod is in contact positioning with the top face of the threaded sleeve, and the outer side face of the lower portion of the threaded sleeve is in threaded connection with a locking nut. The locking nut is located below the angle ejector sliding block, a threaded hole is formed in the bottom face of the angle ejector rod, the locking screw penetrates through the threaded sleeve and then is connected into the threaded hole in the bottom face of the angle ejector rod in a threaded mode, and the bottom of the angle ejector rod makes contact with the side face of the angle ejector rod installation hole to prevent rotation. The extending length of the angle ejector rod can be adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a mechanism for adjusting the length of an inclined ejector rod on an injection mold. Background Art

[0002] Now is the era of rapid development of automotive molds, which emphasizes the concepts of high efficiency, accuracy and cost reduction. The realization of automated production of molds is the most direct manifestation of improving the production capacity of parts; therefore, in the process of mold design and manufacturing, we must consider parts, standardization, and interchangeability; avoid the original non-standard single-piece production model.

[0003] In the injection mold of automotive parts, the inclined ejector pin is a very critical and commonly used component. When adjusting the length of the inclined ejector pin, the dimensional error caused by the template height and processing accuracy will lead to inaccurate heights between the ejector pin and the ejector block. In addition, the inclined ejector pin will become fatigued in subsequent production, and the screws will easily loosen during long-term mass production, resulting in ejector block marks. In severe cases, the ejector block cannot be reset to the lowest position and collides with the cavity, requiring regular maintenance and inspection. This is time-consuming and labor-intensive, affecting production efficiency. At the same time, when there is a processing error in the length of the ejector pin, it is usually necessary to grind it specifically, which is labor-intensive, inefficient, and requires high operating requirements from workers. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide a length adjustment mechanism for the inclined ejector rod on the injection mold, which has a novel structure and can adjust the extended length of the inclined ejector rod, allowing a certain error in the length of the inclined ejector rod during the processing process, and the self-locking structure is stable after the inclined ejector rod is adjusted, which can avoid loosening in subsequent production.

[0005] The technical scheme of the present invention is a mechanism for adjusting the length of an inclined ejector rod on an injection mold, comprising a core plate and a core fixing plate connected by a mold foot, wherein the top surface of the core fixing plate is provided with an ejector base plate and an ejector panel, and an ejector oil cylinder is provided on the ejector base plate to realize ejection relative to the core fixing plate, and the feature is that: an inclined ejector fixing seat is connected to the ejector base plate through an insert, a guide slide groove is transversely provided in the inclined ejector fixing seat, an inclined ejector slide block is installed in the guide slide groove, and a stepped hole is provided in the inclined ejector slide block that passes through from top to bottom, and the stepped hole includes an upper inclined ejector rod mounting hole and a lower inclined ejector rod mounting hole. A threaded hole, the upper end of the inclined ejector rod passes through the core plate and is connected to the inclined ejector block, the bottom of the inclined ejector rod is arranged in the inclined ejector rod mounting hole, a screw sleeve is threadedly connected in the threaded hole, the bottom surface of the inclined ejector rod contacts and is positioned with the top surface of the screw sleeve, a locking nut is threadedly connected to the outer side surface of the lower part of the screw sleeve, the locking nut is located below the inclined ejector slider, a threaded hole is arranged on the bottom surface of the inclined ejector rod, the locking screw passes through the screw sleeve and is threadedly connected to the threaded hole on the bottom surface of the inclined ejector rod, a first straight groove surface is axially arranged on the side surface of the bottom of the inclined ejector rod, and the side surface of the inclined ejector rod mounting hole of the inclined ejector slider contacts the first straight groove surface for positioning to prevent the inclined ejector rod from rotating.

[0006] Preferably, a second straight groove surface is axially arranged on the side surface of the inclined ejector rod, and an anti-rotation block is connected to the bottom surface of the core plate, and the anti-rotation block contacts the top of the second straight groove surface to prevent the inclined ejector rod from rotating.

[0007] Preferably, the diameter of the installation hole of the inclined ejector rod is larger than the diameter of the threaded hole, and the outer diameter of the inclined ejector rod is larger than the outer diameter of the threaded sleeve.

[0008] Preferably, a shock-proof gasket is provided between the locking screw and the threaded sleeve.

[0009] Preferably, the number of the shock-proof gaskets is 2, which are stacked up and down.

[0010] Preferably, the number of ejector oil cylinders on the ejector base plate is 4, which are distributed at the left and right ends of the front and rear long sides of the ejector base plate.

[0011] Preferably, the inclined top fixing seat is connected to the ejector base plate insert by screws, the guide slot is a T-slot opened at the lower part of the inclined top fixing seat, and limit plates are respectively arranged at the front and rear ends of the guide slot, and the limit plates are connected to the inclined top fixing seat by screws. The cross-sectional shape of the inclined top slider corresponds to the T-slot, and it can slide back and forth when installed in the guide slot.

[0012] The present invention can adjust the extended length of the inclined ejector rod, allowing a certain error in the length of the inclined ejector rod during the processing process, and the self-locking structure is stable after the inclined ejector rod is adjusted, which can avoid loosening in subsequent production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure between the medium-sized core plate, the ejector panel, the ejector bottom plate and the inclined ejector rod of the present invention; Figure 3 for Figure 2 The main view; Figure 4 for Figure 3 Cross-sectional view along AA direction; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the connection structure of the inclined ejector rod in the present invention; Figure 7 for Figure 6 Schematic diagram of the structure after the middle inclined top fixing seat is removed; Among them: 1—mold foot; 2—core plate; 3—core fixing plate; 4—ejector base plate; 5—ejector panel; 6—elevator fixing seat; 61—guide slide groove; 7—elevator slider; 71—stepped hole; 711—elevator rod mounting hole; 712—threaded hole; 8—elevator rod; 81—first straight groove surface; 82—second straight groove surface; 9—elevator block; 10—screw sleeve; 11—locking nut; 12—locking screw; 13—anti-rotation block; 14—anti-vibration gasket; 15—limiting plate. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] like Figures 1 to 7 As shown, the present invention provides an injection mold upper inclined ejector rod length adjustment mechanism, comprising a core plate 2 and a core fixing plate 3 connected by a mold foot 1, the top surface of the core fixing plate 3 is provided with an ejector base plate 4 and an ejector panel 5, the ejector base plate 4 is provided with an ejector oil cylinder to realize its ejection relative to the core fixing plate 3, the ejector base plate 4 is connected with an inclined ejector fixing seat 6 through an insert, the inclined ejector fixing seat 6 is transversely provided with a guide slot 61, the guide slot 61 is installed with an inclined ejector slide block 7, the inclined ejector slide block 7 is provided with a stepped hole 71 that passes through from top to bottom, the stepped hole 71 includes an upper inclined ejector rod mounting hole 711 and a lower threaded hole 712, the inclined ejector rod 8 The upper end passes through the core plate 2 and is connected to the inclined ejector block 9. The bottom of the inclined ejector rod 8 is arranged in the inclined ejector rod mounting hole 711. The threaded hole 712 is threadedly connected with a screw sleeve 10. The bottom surface of the inclined ejector rod 8 contacts and is positioned with the top surface of the screw sleeve 10. The lower outer side surface of the screw sleeve 10 is threadedly connected with a locking nut 11. The locking nut 11 is located below the inclined ejector slider 7. A threaded hole is arranged on the bottom surface of the inclined ejector rod 8. The locking screw 12 passes through the screw sleeve 10 and is threadedly connected to the threaded hole on the bottom surface of the inclined ejector rod 8. The bottom side surface of the inclined ejector rod 8 is axially provided with a first straight groove surface 81. The side surface of the inclined ejector rod mounting hole 711 of the inclined ejector slider 7 contacts the first straight groove surface 81 for positioning to prevent the inclined ejector rod 8 from rotating.

[0016] In the above scheme, the side of the inclined ejector rod 8 is axially provided with a second straight groove surface 82, and the bottom surface of the core plate 2 is connected with an anti-rotation block 13, which contacts the top of the second straight groove surface 82 to prevent the inclined ejector rod 8 from rotating.

[0017] In addition, the diameter of the inclined ejector rod installation hole 711 is larger than the diameter of the threaded hole 712 , and the outer diameter of the inclined ejector rod 8 is larger than the outer diameter of the threaded sleeve 10 .

[0018] Specifically, a shock-proof gasket 14 is provided between the locking screw 12 and the threaded sleeve 10 .

[0019] In addition, the number of the shockproof gaskets 14 is two, which are stacked up and down.

[0020] Specifically, the number of ejector oil cylinders on the ejector base plate 4 is 4, which are distributed at the left and right ends of the front and rear long sides of the ejector base plate 4.

[0021] Furthermore, the inclined top fixing seat 6 is connected to the insert of the ejector base plate 4 by screws, the guide slot 61 is a T-slot opened at the lower part of the inclined top fixing seat 6, and the front and rear ends of the guide slot 61 are respectively provided with limit plates 15, and the limit plates 15 are connected to the inclined top fixing seat 6 by screws. The cross-sectional shape of the inclined top slider 7 corresponds to the T-slot, and it is installed in the guide slot 61 and can slide back and forth.

[0022] The working principle of the present invention is as follows: When adjusting the height of the inclined ejector rod 8, insert the lower part of the inclined ejector rod 8 into the inclined ejector rod mounting hole 711, rotate the screw sleeve 10 to control the height of the top surface of the screw sleeve 10, and after the height is adjusted to the right position, tighten the locking nut 11 to lock the screw sleeve 10 to prevent slight axial movement due to thread error, and then tighten the locking screw 12 to pull the inclined ejector rod 8. The anti-vibration gasket 14 can effectively prevent the locking screw 12 from loosening and completely fix the position of the bottom surface of the inclined ejector rod 8, thus achieving accurate positioning of the inclined ejector rod 8. Due to the anti-rotation structure at the bottom of the first straight groove surface 81 and the anti-rotation structure at the top of the second straight groove surface 82, the inclined ejector rod 8 will not rotate. When the locking screw 12 is tightened, the bottom surface of the inclined ejector rod 8 and the screw sleeve 10 are fixed in one. Since the inclined ejector rod 8 cannot rotate, the screw sleeve 10 cannot rotate either. Finally, the inclined ejector rod 8 is fixed in the current position, and it is guaranteed that it will not loosen for a long time in the later production process.

[0023] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A mechanism for adjusting the length of an inclined ejector rod on an injection mold, comprising a core plate (2) and a core fixing plate (3) connected by a mold foot (1), the top surface of the core fixing plate (3) being provided with an ejector base plate (4) and an ejector face plate (5), the ejector base plate (4) being provided with an ejector oil cylinder for ejecting the ejector relative to the core fixing plate (3), characterized in that: The ejector base plate (4) is connected to an inclined ejector fixing seat (6) via an insert block, a guide slot (61) is transversely arranged in the inclined ejector fixing seat (6), an inclined ejector slider (7) is installed in the guide slot (61), a stepped hole (71) extending vertically is arranged in the inclined ejector slider (7), the stepped hole (71) includes an upper inclined ejector rod mounting hole (711) and a lower threaded hole (712), the upper end of the inclined ejector rod (8) passes through the core plate (2) and is connected to the inclined ejector block (9), the bottom of the inclined ejector rod (8) is arranged in the inclined ejector rod mounting hole (711), and the threaded hole (712) is internally threaded with a threaded hole (712). The sleeve (10) is provided with a bottom surface of the inclined ejector rod (8) in contact with the top surface of the screw sleeve (10) for positioning; the outer side surface of the lower part of the screw sleeve (10) is threadedly connected with a locking nut (11); the locking nut (11) is located below the inclined ejector slider (7); a threaded hole is provided on the bottom surface of the inclined ejector rod (8); a locking screw (12) passes through the screw sleeve (10) and is threadedly connected to the threaded hole on the bottom surface of the inclined ejector rod (8); a first straight groove surface (81) is provided on the side surface of the bottom of the inclined ejector rod (8) along the axial direction; the side surface of the inclined ejector rod mounting hole (711) of the inclined ejector slider (7) contacts the first straight groove surface (81) for positioning to prevent the inclined ejector rod (8) from rotating.

2. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 1, characterized in that: A second straight groove surface (82) is axially arranged on the side surface of the inclined ejector rod (8), and an anti-rotation block (13) is connected to the bottom surface of the core plate (2); the anti-rotation block (13) contacts the top of the second straight groove surface (82) to prevent the inclined ejector rod (8) from rotating.

3. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 1, characterized in that: The diameter of the inclined ejector rod installation hole (711) is greater than the diameter of the threaded hole (712), and the outer diameter of the inclined ejector rod (8) is greater than the outer diameter of the threaded sleeve (10).

4. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 1, characterized in that: An anti-vibration gasket (14) is provided between the locking screw (12) and the screw sleeve (10).

5. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 4, characterized in that: The number of the anti-vibration gaskets (14) is 2, which are stacked up and down.

6. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 1, characterized in that: The ejector oil cylinders on the ejector base plate (4) are four in number and are distributed at the left and right ends of the ejector base plate (4) in the front and rear long side directions.

7. The injection mold upper inclined ejector rod length adjustment mechanism according to claim 1, characterized in that: The inclined top fixing seat (6) is connected to the insert of the ejector base plate (4) by screws. The guide slide groove (61) is a T-shaped groove opened at the lower part of the inclined top fixing seat (6). The front end and the rear end of the guide slide groove (61) are respectively provided with limit plates (15). The limit plates (15) are connected to the inclined top fixing seat (6) by screws. The cross-sectional shape of the inclined top sliding block (7) corresponds to the T-shaped groove and is installed in the guide slide groove (61) so as to slide forward and backward.

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