Ejection mechanism for press molding

Abstract

This utility model discloses an ejector mechanism for stamping, comprising a forming groove on the top of a lower stamping die, a working cavity on the bottom of the lower stamping die, a wheel rotatably connected to the lower stamping die within the working cavity, a wheel arm on the side of the wheel, a hydraulic push rod within the working cavity, a composite hole between the forming groove and the working cavity, the composite hole including an upper hole and a lower hole, the diameter of the lower hole being larger than the diameter of the upper hole, forming a step between the lower hole and the upper hole, an ejector pin slidably connected within the composite hole, a fixing retaining ring on the side of the ejector pin located within the lower hole, an elastic element fitted onto the ejector pin, a guide groove matching the composite hole on the upper end of the wheel, and the lower end of each ejector pin located within a guide groove, the guide grooves extending circumferentially around the axis of the wheel and decreasing in depth along the same extension direction. This ejector mechanism features a compact structure, small footprint, easy assembly and disassembly, complete overall function, and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and more specifically, it relates to an ejection mechanism for stamping. Background Technology

[0002] By setting an ejection mechanism at the bottom of the stamping die, the formed product can be easily ejected, facilitating unloading. Traditional ejection mechanisms on the stamping die typically extend along the opening and closing direction of the die, resulting in a large height of the vertically opening die, occupying a large space, making disassembly and assembly inconvenient, and leading to poor overall performance. Therefore, this invention proposes an ejection mechanism for stamping. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an ejection mechanism for stamping, which has the characteristics of compact structure, small space occupation, and convenient assembly and disassembly.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: This utility model relates to an ejection mechanism for stamping, comprising an upper stamping die and a lower stamping die. The top of the lower stamping die is provided with a forming groove, and the bottom of the lower stamping die is provided with a working cavity. A wheel rotatably connected to the lower stamping die is provided within the working cavity. At least one wheel arm extending radially is provided on the side of the wheel. A hydraulic push rod, with one end hinged to the lower stamping die and the other end hinged to the wheel arm, is also provided within the working cavity. Several rods are arranged in a circular array around the axis of the wheel between the forming groove and the working cavity. The composite hole connects the forming groove and the working cavity. The composite hole includes an upper hole and a lower hole, the diameter of which is larger than that of the upper hole. A stepped portion is formed between the lower hole and the upper hole, which is integrated with the stamping die. An ejector post is slidably connected inside the composite hole. A fixing retaining ring is provided on the side of the ejector post and located in the lower hole. An elastic element is fitted on the ejector post. The upper end of the wheel is provided with guide grooves that match the composite holes one by one. The lower end of each ejector post is located in a guide groove. The guide groove extends circumferentially around the axis of the wheel and decreases in depth along the same extension direction.

[0005] The present invention is further configured such that: a retaining spring groove is provided on the wall of the lower hole, an inner retaining spring is embedded in the retaining spring groove, and the fixing retaining ring is disposed between the elastic element and the inner retaining spring.

[0006] The present invention is further configured such that the elastic element is a compression spring with one end abutting against the step portion and the other end abutting against the fixed retaining ring.

[0007] The present invention is further configured such that: the lower end of the ejector column has a ball head that extends into the guide groove.

[0008] The present invention is further configured such that: the side of the wheel is provided with two wheel arms extending radially.

[0009] The present invention is further configured such that the included angle between the two wheel arms is 180°.

[0010] In summary, the present invention has the following beneficial effects: The ejection mechanism for stamping involved in the present invention has a vertical force transmission mechanism between the hydraulic push rod applying force and the ejection column receiving force, so that the extension direction of the hydraulic push rod is perpendicular to the opening and closing direction of the stamping die, thereby reducing the vertical height, thereby reducing the volume of the die, reducing the space occupied, making disassembly and assembly more convenient, and having complete overall functions and strong practicality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0013] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0014] Example 1 See Figure 1 and Figure 2As shown, the ejection mechanism for stamping in this embodiment includes an upper stamping die (not shown) and a lower stamping die 100. The lower stamping die 100 has a forming groove 1 on its top and a working cavity 2 at its bottom. A wheel 3 rotatably connected to the lower stamping die is located within the working cavity 2. Two radially extending wheel arms 4 are located on the side of the wheel 3, with an included angle of 180° between the two wheel arms 4. A hydraulic push rod 5, with one end hinged to the lower stamping die and the other end hinged to the wheel arm, is also located within the working cavity 2. A plurality of composite holes arranged in a circular array around the axis of the wheel are provided between the forming groove 1 and the working cavity 2. These composite holes connect the forming groove 1 and the wheel arm. The working cavity 2 includes an upper hole 6 and a lower hole 7. The diameter of the lower hole 7 is larger than that of the upper hole 6. A stepped portion 8, which is integrated with the stamping die, is formed between the lower hole 7 and the upper hole 6. An ejector pin 9 is slidably connected inside the composite hole. A fixing retaining ring 10 is provided on the side of the ejector pin 9 and located inside the lower hole. An elastic element 11 is fitted on the ejector pin 9. The elastic element 11 is a compression spring with one end abutting against the stepped portion and the other end abutting against the fixing retaining ring. The upper end of the wheel 3 is provided with guide grooves 12 that match the composite holes one by one. The lower end of each ejector pin 9 is located in a guide groove 12. The guide groove 12 extends circumferentially around the axis of the wheel 3 and decreases in depth along the same extension direction.

[0015] In this embodiment, the extended hydraulic push rod 5, driven by the wheel arm 4, rotates the wheel 3 relative to the lower stamping die 100. Simultaneously, the guide groove 12 moves until its depth decreases, thereby pushing the ejector pin 9, located at its lower end within the groove, upwards. The elastic element 11 is compressed, and the upper end of the ejector pin 9 extends out of the upper hole 6 and into the forming groove 1, achieving the demolding function of the formed workpiece from the forming groove 1. Afterwards, the hydraulic push rod 5 and the ejector pin 9 reset.

[0016] The elastic element 11 is used to automatically reset the ejector post 9.

[0017] Example 2 See Figure 1 and Figure 2 As shown, the ejection mechanism for stamping in this embodiment is further configured based on embodiment 1, wherein the lower hole 7 has a retaining spring groove 13 on the hole wall, an inner retaining spring 14 is embedded in the retaining spring groove 13, and the fixing retaining ring 10 is disposed between the elastic member 11 and the inner retaining spring 14.

[0018] In this embodiment, the snap ring groove 13, in conjunction with the inner snap ring 14, serves to restrict the axial downward movement of the ejector pin 9. When the wheel 3 is not installed, it prevents the ejector pin 9 from dislodging from the composite hole, thus providing positioning for the ejector pin 9 and facilitating the installation of subsequent components.

[0019] Example 3 See Figure 1 and Figure 2 As shown, the ejector mechanism for stamping involved in this embodiment is further configured, based on embodiment 1, that the lower end of the ejector post 9 has a ball head 15 extending into the guide groove.

[0020] The ejection mechanism for stamping involved in this utility model has a vertical force transmission mechanism between the hydraulic push rod that applies force and the ejection column that receives force, so that the extension direction of the hydraulic push rod is perpendicular to the opening and closing direction of the stamping die, thereby reducing the vertical height and thus reducing the volume of the die, reducing the space occupied, making disassembly and assembly more convenient, and having complete overall functions and strong practicality.

[0021] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0022] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An ejection mechanism for stamping, comprising an upper stamping die and a lower stamping die, wherein the top of the lower stamping die is provided with a forming groove, characterized in that: The bottom of the stamping die has a working cavity, and a wheel disk rotatably connected to the stamping die is provided in the working cavity. At least one wheel disk arm extending radially is provided on the side of the wheel disk. A hydraulic push rod is also provided in the working cavity, with one end hinged to the stamping die and the other end hinged to the wheel disk arm. A plurality of composite holes arranged in a ring array around the axis of the wheel disk are provided between the forming groove and the working cavity. The composite holes connect the forming groove and the working cavity. The composite holes include an upper hole and a lower hole. The diameter of the lower hole is larger than the diameter of the upper hole. A step portion is formed between the lower hole and the upper hole, which is integral with the stamping die. An ejector post is slidably connected in the composite hole. A fixing retaining ring is provided on the side of the ejector post in the lower hole. An elastic element is sleeved on the ejector post. The upper end of the wheel disk has a guide groove that matches the composite holes one by one. The lower end of each ejector post is provided in a guide groove. The guide groove extends circumferentially around the axis of the wheel disk and decreases in depth along the same extension direction.

2. The ejection mechanism for stamping according to claim 1, characterized in that: The lower hole has a retaining spring groove on its wall, and an inner retaining spring is embedded in the retaining spring groove. The fixing retaining ring is located between the elastic element and the inner retaining spring.

3. The ejection mechanism for stamping according to claim 2, characterized in that: The elastic element is a compression spring with one end abutting against the stepped portion and the other end abutting against the fixed retaining ring.

4. The ejection mechanism for stamping according to any one of claims 1-3, characterized in that: The lower end of the ejector column has a ball head that extends into the guide groove.

5. The ejection mechanism for stamping according to claim 1, characterized in that: The side of the wheel is provided with two wheel arms that extend radially.

6. The ejection mechanism for stamping according to claim 5, characterized in that: The included angle between the two wheel arms is 180°.

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