Ejector plate ejection structure for injection mold

Abstract

The utility model provides a kind of ejector plate ejection structure of injection mold, belong to mould technical field.It solves how to improve the service life of ejector plate problem.The ejector plate ejection structure of this injection mold, injection mold includes bottom plate and and the template of bottom plate panel surface opposite arrangement, bottom plate and the template between being equipped with ejector plate, and the ejector plate can be towards bottom plate or towards the template sliding, the top rod of outer end for connecting injection molding machine is arranged in the bottom plate, ejector plate ejection structure includes the adjusting plate of strip shape, the adjusting plate is located on the bottom plate and one end and the bottom plate are hinged, the adjusting plate other end is claw shape and and the plate surface center of the ejector plate is in abutment, the inner end of the top rod and the adjusting plate are in abutment.The ejector plate ejection structure of this injection mold can improve the service life of ejector plate.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an ejector plate ejection structure for injection molds. Background Technology

[0002] Currently, demolding of injection molded products is often achieved using the injection molding machine as the power source. Specifically, an ejector pin is specially installed on the injection molding machine. When the mold is in the open state, the injection molding machine drives the ejector pin, which pushes the ejector plate in the mold. Then, the ejector plate drives the ejector pins fixed on its surface to extend into the cavity through specially opened channels in the mold plate. Under the continuous action of the ejector pin's pushing force, the ejector pins can be used to eject the molded product and demold it.

[0003] However, in reality, injection molding machines are generally not designed for a single mold. When used in conjunction with different mold models, various uncontrollable factors can lead to deviations in the mating positions of the ejector pin and the ejector plate. Simply put, under normal conditions, the ejector pin should be against the center of the ejector plate. However, in reality, the ejector pin is relatively offset from the center of the plate. Therefore, during operation, the ejector plate may become skewed when it is pushed. Although the ejector plate is limited and guided by the guide pillars in the mold, the ejector plate and the guide pillars are gradually in a state of excessive interference over a long period of time. Over time, this will cause irreparable damage to the ejector plate. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an ejector plate structure for injection molds. The technical problem this invention aims to solve is: how to improve the service life of the ejector plate.

[0005] The objective of this utility model can be achieved through the following technical solution: an ejector plate ejection structure for an injection mold, the injection mold including a base plate and a template disposed opposite to the base plate surface, an ejector plate being provided between the base plate and the template, and the ejector plate being slidable toward the base plate or toward the template, an ejector rod with its outer end for connecting to an injection molding machine being provided through the base plate, characterized in that the ejector plate ejection structure includes an elongated adjusting plate, the adjusting plate being located on the base plate and one end being hinged to the base plate, the other end of the adjusting plate being claw-shaped and abutting against the center of the ejector plate surface, and the inner end of the ejector rod abutting against the adjusting plate.

[0006] Compared to existing technologies, this application, based on the original mold structure, installs a long, strip-shaped adjusting plate on the mold's base plate. One end of the adjusting plate is hinged to the base plate. During ejection, the injection molding machine is still used as the power source, driving the ejector pin to move. This allows the ejector pin to push the adjusting plate during movement. In this process, the adjusting plate actually rotates around the hinge point with the base plate and pushes the ejector plate through its other end. Thanks to the adjusting plate, the ejector pin can be effectively controlled. The force application position on the ejector plate is appropriately adjusted to ensure that the force application position of the ejector plate can be more centered. Based on this structure, the force application end of the adjustment plate is further set into a claw shape, so that the adjustment plate has multiple force application points that apply force simultaneously on the surface of the ejector plate. This achieves balanced lifting of the ejector plate by the adjustment plate, and allows the ejector plate to slide between the template and the base plate while maintaining this posture. This prevents the ejector plate from tilting and avoids excessive interference between the ejector plate and the guide pillars of the mold for a long time. This ensures the service life of the ejector plate while realizing the ejection of the product.

[0007] In the ejector plate structure of the injection mold described above, one end of the adjusting plate is a hinged end, and the other end is abutting end. The adjusting plate is hinged to the base plate through the hinged end, and the abutting end is U-shaped. Specifically, the adjusting plate has two force-applying parts to push the ejector plate by setting the abutting end to a U-shaped claw shape. This makes the force-bearing area of ​​the ejector plate more dispersed while maintaining the central force. As an alternative, the abutting end can also be set in various styles such as three-claw or four-claw, as long as all the claws are on the same horizontal plane.

[0008] In the ejector plate ejection structure of the injection mold described above, the two claws of the abutment end are symmetrically arranged with respect to the axis of the adjusting plate. Furthermore, the symmetrical abutment end ensures that the reaction force generated when the two force-applying parts push the ejector plate can be evenly borne by the two force-applying parts of the abutment end, avoiding uneven force distribution that could cause the abutment end of the adjusting plate to break.

[0009] In the ejector plate ejection structure of the above-described injection mold, a hinge seat is fixed on the base plate, the hinge end is hinged to the hinge seat, and the ejector rod abuts against the outer wall of the adjusting plate near the center. This arrangement allows the adjusting plate to use its own outer wall as a force-bearing point, and in conjunction with the ejector rod, to apply force to the central area of ​​the ejector plate surface.

[0010] In the ejector plate structure of the injection mold described above, the base plate has an elongated receiving groove, the adjusting plate is embedded in the receiving groove, and the hinge seat is fixed to the bottom wall of the receiving groove. The receiving groove accommodates the adjusting plate and the hinge seat, thereby ensuring that the ejector plate can be supported by the base plate during its retraction state.

[0011] Compared with existing technologies, the ejector plate ejection structure of this injection mold has the following advantages: by hinged to a long strip-shaped adjustment plate on the base plate and pushing the adjustment plate with an ejector rod, the adjustment plate rotates around the hinge and applies force to the center area of ​​the ejector plate from the claw-shaped end, thus avoiding the ejector plate from tilting and ensuring the service life of the ejector plate while realizing the ejection of the product. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the ejector plate ejection structure of this injection mold.

[0013] Figure 2 This is a cross-sectional view of the ejector plate structure of this injection mold.

[0014] Figure 3 This is a structural diagram of the base plate and adjustment plate.

[0015] Figure 4 This is a schematic diagram of the adjustment plate.

[0016] In the diagram, 1 is the base plate; 11 is the top rod; 12 is the hinge seat; 13 is the receiving groove; 2 is the template; 3 is the ejector plate; 4 is the adjusting plate; 41 is the hinge end; and 42 is the abutment end. Detailed Implementation

[0017] 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.

[0018] like Figure 1 and Figure 2 As shown, in the ejector plate ejection structure of this injection mold, the injection mold includes a template 2, an ejector plate 3 and a base plate 1. The surfaces of the template 2 and the base plate 1 are arranged opposite to each other. The ejector plate 3 is located between the template 2 and the base plate 1 and can slide and abut against the surface of the template 2 or against the surface of the base plate 1.

[0019] Combination Figure 3 and Figure 4The ejection structure of the ejector plate includes an adjusting plate 4 and a hinge seat 12. The adjusting plate 4 is elongated, with one end being a hinge end 41 and the other end being an abutment end 42. The abutment end 42 is specifically U-shaped, and the two claws of the abutment end 42 are symmetrically arranged with respect to the axis of the adjusting plate 4. A receiving groove 13 with the same shape and contour as the adjusting plate 4 is provided on the side of the base plate 1 and the template 2. The adjusting plate 4 is embedded in the receiving groove 13. The hinge seat 12 is fixed to the bottom wall of the receiving groove 13 by screws. A through-shaft channel is provided on the base plate 1, which runs through both sides of the plate. It should be noted that the inner end of the through-shaft channel runs through the bottom wall of the middle part of the receiving groove 13.

[0020] In actual operation, the ejector rod 11 connected to the injection molding machine passes through the through-shaft channel and abuts against the outer wall of the adjusting plate 4 near the middle. Driven by the injection molding machine, the adjusting plate 4 rotates around the hinge towards the ejector plate 3. The abutment plate of the adjusting plate 4 abuts against the center of the ejector plate 3, and under the continuous action of the pushing force, the ejector plate 3 is gradually pushed towards the template 2. In this way, the ejector pins installed on the ejector plate 3 eject the molded product. Throughout the entire working process, it can be ensured that the ejector plate 3 remains parallel to the base plate 1 and the template 2, and that there is no interference between the ejector plate 3 and the guide pillars in the mold used to guide the ejector plate 3, effectively ensuring the service life of the ejector plate 3.

[0021] 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 substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document frequently uses terms such as base plate 1, top rod 11, hinge seat 12, receiving groove 13, template 2, ejector plate 3, adjusting plate 4, hinge end 41, and abutment end 42, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An ejector plate ejection structure for an injection mold, the injection mold comprising a base plate (1) and a template (2) disposed opposite to the surface of the base plate (1), an ejector plate (3) being provided between the base plate (1) and the template (2), and the ejector plate (3) being slidable toward the base plate (1) or toward the template (2), wherein an ejector rod (11) with its outer end for connecting to an injection molding machine is provided through the base plate (1), characterized in that, The ejector plate ejection structure includes an elongated adjustment plate (4), which is located on the base plate (1) and is hinged to the base plate (1) at one end. The other end of the adjustment plate (4) is claw-shaped and abuts against the center of the ejector plate (3). The inner end of the ejector rod (11) abuts against the adjustment plate (4).

2. The ejector plate ejection structure of the injection mold according to claim 1, characterized in that, One end of the adjustment plate (4) is a hinge end (41), and the other end is an abutment end (42). The adjustment plate (4) is hinged to the base plate (1) through the hinge end (41), and the abutment end (42) is U-shaped.

3. The ejector plate ejection structure of the injection mold according to claim 2, characterized in that, The two claws of the abutment end (42) are arranged symmetrically with respect to the axis of the adjusting plate (4).

4. The ejector plate ejection structure of the injection mold according to claim 2 or 3, characterized in that, A hinge seat (12) is fixed on the base plate (1), the hinge end (41) is hinged to the hinge seat (12), and the top rod (11) abuts against the outer side wall of the adjusting plate (4) near the middle.

5. The ejector structure of the pin plate of an injection mold according to claim 4, characterized in that, The base plate (1) has a long strip-shaped receiving groove (13), the adjusting plate (4) is embedded in the receiving groove (13), and the hinge seat (12) is fixed to the bottom wall of the receiving groove (13).

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