An inclined ejection structure of a mold

Abstract

This invention provides a slanted ejection structure for a mold, belonging to the field of mold technology. It solves the technical problem that slanted ejection structures in molds struggle to balance operational accuracy and ease of maintenance. The mold includes a moving mold core, an ejector plate, and a moving mold base plate. The slanted ejection structure includes a slanted ejector rod, a slanted guide post, and a guide seat. The upper end of the slanted ejector rod is inserted into the moving mold core, and the lower end is fixed to the guide seat. The ejector plate has a vertically connected receiving groove. The lower end of the slanted guide post is fixed to the moving mold base plate below the receiving groove. The slanted ejection structure also includes an inclined, strip-shaped guide rail. The inner side of the guide rail has a longitudinally penetrating groove, making its cross-section U-shaped. The guide rail is fixed within the receiving groove, with its upper end extending out of the groove. The slanted ejector rod and slanted guide post are arranged sequentially along the lower end of the guide rail. The guide seat is slidably connected to the groove along the longitudinal direction of the guide rail. This invention improves maintenance convenience while ensuring ejection operational accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an inclined ejection structure for a mold. Background Technology

[0002] When a plastic part has a large undercut that cannot be forcibly demolded, a slanted ejector core-pulling mechanism is typically used to eject and demold the part. Common slanted ejector core-pulling mechanisms are generally used for horizontal core pulling or small-angle downhill core pulling, with the angle generally not exceeding 10°. If the angle between the core-pulling direction of the plastic part's undercut and the horizontal direction is ≥25°, using a common slanted ejector core-pulling mechanism can easily lead to unreliable moving parts during the core-pulling process, and even defects such as biting or jamming, affecting the normal use and maintenance costs of the mold.

[0003] To address this, patent application CN113211736A discloses a slanted ejection and demolding structure for a molding die. An upper ejector is slidably mounted on a supporting guide block, and an active slider is slidably mounted on the upper ejector. The active slider has a first and a second inclined guide portion, and the supporting guide block has a third inclined guide portion with the same inclination angle as the first inclined guide portion. A driven slide is located beside the active slider, and a fourth inclined guide portion with the same inclination angle as the second inclined guide portion is located on the driven slide. The slanted ejector is mounted on the driven slide. When the upper ejector pushes upward, the first and third inclined guide portions cooperate to make the active slider slide upward at an inclined angle. During the sliding of the active slider, the second and fourth inclined guide portions cooperate to make the driven slide slide downward at an inclined angle, and the slanted ejector pushes upward to demold.

[0004] The aforementioned inclined top structure can keep the angle of the ejector rod stable during the lifting of the ejector plate, avoiding jamming when the core pulling angle is too large. However, there are still some shortcomings: its driven slide and other components are wrapped inside the ejector plate. When disassembly and maintenance are required after long-term use, the ejector base plate and ejector face plate need to be separated. The ejector plate connection structure is complex, and disassembly is very troublesome, resulting in inconvenient maintenance. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in existing technologies by providing a slanted ejection structure for molds. The technical problem this utility model aims to solve is that existing slanted ejection structures for molds struggle to balance operational precision and ease of maintenance.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] An inclined ejection structure for a mold, the mold including a moving mold core, an ejector plate, and a moving mold base plate, the inclined ejection structure including an inclined ejector rod, an inclined guide post, and a guide seat, wherein the upper end of the inclined ejector rod is inserted into the moving mold core, the lower end of the inclined ejector rod is fixed to the guide seat, the inclined guide post is parallel to and spaced apart from the inclined ejector rod, and the middle section of the inclined guide post passes through the guide seat, characterized in that the ejector plate has a vertically connected receiving groove, the lower end of the inclined guide post is fixed to the moving mold base plate below the receiving groove, the inclined ejection structure further includes an inclined strip-shaped guide rail, the inner side of the guide rail having a longitudinally penetrating groove making the cross-section of the guide rail U-shaped, the guide rail being fixed in the receiving groove, the upper end of the guide rail extending out of the receiving groove, the inclined ejector rod and the inclined guide post being arranged sequentially along the direction of the lower end of the guide rail, and the guide seat being slidably connected to the groove along the longitudinal direction of the guide rail.

[0008] By creating a receiving groove on the ejector plate, the lower end of the inclined guide post is fixed to the moving mold base plate below the receiving groove, and an inclined guide rail is fixed inside the receiving groove, with the upper end of the guide rail extending out of the receiving groove. The guide seat is slidably connected to the longitudinally penetrating groove of the guide rail. Simultaneously, the inclined ejector rod and the inclined guide post are arranged sequentially along the downward-sloping direction of the guide rail. In the initial state before the ejector plate is lifted, the guide seat located in the receiving groove can be closer to the moving mold base plate, making the contact position between the guide seat and the inclined guide post closer to the fixed position of the inclined guide post and the moving mold base plate. The closer the area is to the fixed position of the inclined guide post, the smaller the deflection of the inclined guide post under force, and the higher the movement accuracy, thus maintaining the stability of the guide seat during its movement along the inclined guide post. Since the upper end of the guide rail extends out of the receiving groove, maintenance personnel can easily remove the inclined ejector rod and the inclined guide post without disassembling the entire ejector plate when maintenance is required. The guide seat can be removed from the upper end of the groove from the outside, thus improving maintenance convenience while ensuring ejection accuracy.

[0009] In the inclined ejection structure of the above mold, there are two guide rails arranged parallel to each other on both sides of the guide seat. This helps to ensure the stable and reliable sliding action of the guide seat.

[0010] In the inclined ejection structure of the above-mentioned mold, each of the grooves is embedded with a sliding plate that can slide back and forth along the groove. The sliding plate is strip-shaped, and the two sides of the guide seat are coaxially rotatably connected to the two sliding plates. In this way, the sliding plate and the guide seat can rotate relative to each other to compensate for the angular deviation caused by the machining error of the inclined ejector rod. This effectively improves the wear and jamming problems that occur between the guide seat and the guide rail due to the angle machining accuracy problem during the movement. The through groove facilitates the removal of the fixing block from the upper end of the guide rail during disassembly, making maintenance convenient.

[0011] In the inclined ejection structure of the above-mentioned mold, a cylindrical wear-resistant bushing is embedded and fixed inside the guide seat, and the wear-resistant bushing is sleeved on the outer circumferential surface of the inclined guide post. In this way, the wear-resistant bushing is used for contact between the guide seat and the inclined guide post. The wear-resistant bushing can be an existing product, which helps to reduce the frictional resistance and frictional loss of relative sliding, and extend the service life.

[0012] In the inclined ejection structure of the above-mentioned mold, the axial cross-section of the inclined guide post is an inverted T-shape with the larger end facing downwards. The smaller end of the inclined guide post penetrates the moving mold base plate from bottom to top, and the larger end of the inclined guide post rests against the moving mold base plate and is fixed to it. In this way, the inclined guide post can be easily disassembled and pulled out from outside the mold base plate during disassembly and maintenance, without having to operate inside the mold, making maintenance convenient.

[0013] In the aforementioned inclined ejection structure of the mold, the lower end of the inclined ejector rod is fixed to the guide seat by a screw that passes through the guide seat from bottom to top. The moving mold base plate below the receiving groove has a clearance through hole arranged coaxially with the screw. This facilitates the removal of the inclined guide post from the outside during maintenance, and also allows the use of tools to remove the screws fixing the inclined ejector rod and the guide seat together through the clearance through hole, saving operation steps and making maintenance convenient.

[0014] In the inclined ejection structure of the above mold, the guide seat is rectangular, and the inclined guide post vertically penetrates the upper and lower sides of the ejector guide seat. Installing and positioning the inclined ejector rod and inclined guide post both require drilling. Compared to drilling inclined holes, drilling straight holes perpendicular to the surface is less costly and more precise. This allows for more accurate machining of the mounting holes on the guide seat, ensuring precise operation.

[0015] In the inclined ejection structure of the above-mentioned mold, the outer periphery of the inclined ejector rod is connected to an inlet pipe and an outlet pipe, which are located above the guide seat. The inlet and outlet pipes are used to connect to the existing cooling channel inside the inclined ejector rod, so that the inclined ejector rod will not be affected by the interference of the inlet and outlet pipes when it is removed from the guide seat, which helps to reduce the difficulty of maintenance and make maintenance more convenient.

[0016] Compared with the prior art, the advantages of this utility model are as follows:

[0017] The inclined ejection structure of this mold has the guide seat arranged close to the moving mold base plate, which ensures the stable sliding of the guide seat along the inclined guide post. In addition, when maintenance personnel need to disassemble and maintain the guide seat, they can remove the inclined ejector rod and the inclined guide post without having to disassemble the entire ejector plate to remove the fixing block, thus balancing the accuracy of the ejection action and the convenience of maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0019] Figure 2yes Figure 1 Enlarged view of part A in the image.

[0020] Figure 3 This is a side view structural diagram of this embodiment.

[0021] Figure 4 yes Figure 3 A schematic diagram of the BB cross-sectional structure.

[0022] Figure 5 yes Figure 4 Enlarged view of section C in the image.

[0023] Figure 6 This is a schematic diagram of the state in which the ejector plate drives the inclined ejector rod to be raised in this embodiment.

[0024] Figure 7 This is a partial three-dimensional exploded view of the structure in this embodiment.

[0025] In the diagram, 1. Moving mold core;

[0026] 2. Ejector plate; 21. Receiving groove;

[0027] 3. Moving mold base plate; 31. Clearance through hole;

[0028] 4. Angled push rod; 5. Angled guide post; 6. Guide seat;

[0029] 7. Guide rail; 71. Slide groove;

[0030] 8. Slide plate; 9. Wear-resistant bushing; 101. Screw; 102. Inlet pipe; 103. Outlet pipe. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figure 1 , Figure 2As shown, this mold includes a moving mold core 1, an ejector plate 2, and a moving mold base plate 3. The inclined ejection structure includes an inclined ejector rod 4, an inclined guide post 5, and a guide seat 6. The lower end of the inclined ejector rod 4 is fixed to the guide seat 6. The inclined guide post 5 is parallel to the inclined ejector rod 4 and arranged at intervals. The middle section of the inclined guide post 5 passes through the guide seat 6. The ejector plate 2 has a receiving groove 21 that is connected vertically. The inclined ejection structure also includes an inclined strip-shaped guide rail 7. There are two guide rails 7 arranged parallel to each other on both sides of the guide seat 6. The direction in which the inclined ejector rod 4 and the inclined guide post 5 are arranged is approximately the same as the direction in which the guide rail 7 extends downward. The guide rail 7 is fixed in the receiving groove 21. The upper end of the guide rail 7 extends out of the receiving groove 21. The guide seat 6 is slidably connected to the guide rail 7 and can be disengaged from the upper end of the guide rail 7. The outer periphery of the inclined push rod 4 is connected to an inlet pipe 102 and an outlet pipe 103. The inlet pipe 102 and the outlet pipe 103 are connected to the existing water passage inside the inclined push rod 4. The inlet pipe 102 and the outlet pipe 103 are located above the guide seat 6.

[0033] like Figure 3 , Figure 4 As shown, the upper end of the inclined ejector rod 4 is inserted into the moving mold core 1, and the lower end of the inclined guide post 5 is fixed on the moving mold base plate 3 below the receiving groove 21.

[0034] like Figure 5 As shown, a cylindrical wear-resistant bushing 9 is embedded and fixed inside the guide seat 6. The wear-resistant bushing 9 is an existing component and is fitted onto the outer circumferential surface of the inclined guide post 5. The radial dimension of the lower end of the inclined guide post 5 is larger than that of the upper end. The small end of the inclined guide post 5 penetrates the moving mold base plate 3 from bottom to top, and the large end of the inclined guide post 5 rests against the moving mold base plate 3 with its large end facing downward. The edge of the large end of the inclined guide post 5 is pressed to the bottom surface of the moving mold base plate 3 by existing screws to achieve fixation. The lower end of the inclined ejector rod 4 is fixed to the guide seat 6 by a screw 101 that penetrates the guide seat 6 from bottom to top. The moving mold base plate 3 below the receiving groove 21 has a clearance through hole 31 arranged coaxially with the screw 101.

[0035] like Figure 6 As shown, after the ejector plate 2 is lifted, it drives the guide rail 7 to move upward synchronously, while the guide seat 6 slides to the right of the guide rail 7, i.e., the lower end of the guide rail 7, so that the inclined ejector rod 4 remains parallel to the inclined guide post 5, thereby avoiding interference between the inclined ejector rod 4 and the moving mold core 1 when it extends upward.

[0036] like Figure 7 As shown, the guide seat 6 is rectangular, and the inclined guide post 5 vertically penetrates the upper and lower sides of the top rod guide seat 6. The inner side of the guide rail 7 has a longitudinally penetrating groove 71, and a sliding plate 8 that can slide back and forth along the groove 71 is embedded in the groove 71. The sliding plate 8 is strip-shaped, and the two sides of the guide seat 6 are coaxially rotatably connected to the two sliding plates 8 through a protruding rotating shaft.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A slanted ejection structure for a mold, the mold comprising a moving mold core (1), an ejector plate (2), and a moving mold base plate (3), the slanted ejection structure comprising a slanted ejector rod (4), a slanted guide post (5), and a guide seat (6), wherein the upper end of the slanted ejector rod (4) is inserted into the moving mold core (1), the lower end of the slanted ejector rod (4) is fixed to the guide seat (6), the slanted guide post (5) is parallel to and spaced apart from the slanted ejector rod (4), and the middle section of the slanted guide post (5) passes through the guide seat (6), characterized in that, The ejector plate (2) has a vertically connected receiving groove (21). The lower end of the inclined guide post (5) is fixed to the moving mold base plate (3) below the receiving groove (21). The inclined ejection structure also includes an inclined strip-shaped guide rail (7). The inner side of the guide rail (7) has a longitudinally penetrating groove (71) so that the cross-section of the guide rail (7) is U-shaped. The guide rail (7) is fixed in the receiving groove (21). The upper end of the guide rail (7) extends out of the receiving groove (21). The inclined ejector rod (4) and the inclined guide post (5) are arranged in sequence along the direction of the lower end of the guide rail (7). The guide seat (6) is slidably connected to the groove (71) along the longitudinal direction of the guide rail (7).

2. The inclined ejection structure of the mold according to claim 1, characterized in that, There are two guide rails (7) arranged in parallel on both sides of the guide seat (6).

3. The inclined ejection structure of the mold according to claim 2, characterized in that, Each of the slide grooves (71) is fitted with a slide plate (8) that can slide back and forth along the slide groove (71). The slide plate (8) is strip-shaped, and the two sides of the guide seat (6) are coaxially rotatably connected to the two slide plates (8).

4. The inclined ejection structure of the mold according to claim 1, 2, or 3, characterized in that, The guide seat (6) is fitted with a cylindrical wear-resistant bushing (9), which is sleeved on the outer circumferential surface of the inclined guide post (5).

5. The inclined ejection structure of the mold according to claim 1, 2, or 3, characterized in that, The axial cross section of the inclined guide post (5) is an inverted T-shape with the large end facing down. The small end of the inclined guide post (5) passes through the moving mold base plate (3) from bottom to top, and the large end of the inclined guide post (5) abuts against the moving mold base plate (3) and is fixed to the moving mold base plate (3).

6. The inclined ejection structure of the mold according to claim 5, characterized in that, The lower end of the inclined push rod (4) is fixed to the guide seat (6) by a screw (101) that passes through the guide seat (6) from bottom to top. The moving mold base plate (3) below the receiving groove (21) has a clearance through hole (31) arranged coaxially with the screw (101).

7. The inclined ejection structure of the mold according to claim 1, 2, or 3, characterized in that, The guide seat (6) is rectangular, and the inclined guide post (5) penetrates vertically through the upper and lower sides of the top rod guide seat (6).

8. The inclined ejection structure of the mold according to claim 1, 2, or 3, characterized in that, The outer periphery of the inclined push rod (4) is connected to an inlet pipe (102) and an outlet pipe (103), which are located above the guide seat (6).

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