An ejection mechanism

Abstract

The ejection mechanism comprises a base plate, a ejector pin plate, fixed ejector pins, movable ejector pins and a movable push rod. The base plate is arranged on the back side of a female mold. The ejector pin plate is arranged on the side of the base plate facing the female mold. The fixed ejector pins are arranged on the ejector pin plate and can penetrate the female mold and push the product. The movable ejector pins are arranged on the ejector pin plate and can penetrate the female mold and push the product. The movable ejector pins and the fixed ejector pins contact the product at different positions. The movable ejector pins can move relative to the ejector pin plate. The movable ejector pins have a first position and a second position. In the first position, the movable ejector pins are lower than the fixed ejector pins. In the second position, the movable ejector pins are higher than the fixed ejector pins. The movable push rod can abut against the female mold and drive the movable ejector pins to switch between the first position and the second position. Compared with the prior art, the ejection mechanism divides the entire demolding process into two steps to reduce the stress time of the same part of the product, effectively demolds the product and avoids damage to the product.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly to an ejection mechanism. Background Technology

[0002] A mold includes a male mold plate, a female mold plate, a male mold core, and a female mold core. The male mold core is a punch, and the female mold core is a die. Together, they form a complete molding cavity. The male mold core is fixed to the male mold plate to form the male mold, and the female mold core is fixed to the female mold plate to form the female mold. Generally, the female mold is relatively fixed, while the male mold can move relative to the female mold plate. Therefore, mold opening involves moving the male mold away from the female mold, thereby removing the product from the female mold. Similarly, mold closing involves positioning and assembling the male and female molds to form a complete molding cavity.

[0003] Early molds had relatively simple structures, often resulting in the part sticking to the female mold core. Therefore, some manufacturers incorporated an ejection mechanism on the female mold plate to eject the part from the core. This ejection mechanism typically included several compression springs and ejector pins. When the male and female molds separated, the compression springs were released and pushed against the ejector pins, thus ejecting the part from the female mold core. However, this ejection mechanism often caused localized deformation and damage to the part during ejection.

[0004] Therefore, the above problems need to be addressed. Utility Model Content

[0005] The purpose of this application is to provide an ejection mechanism that can push the product twice to avoid local deformation and damage caused by prolonged stress on the same position.

[0006] To achieve the above objectives, the ejection mechanism provided in this application includes a base plate, an ejector plate, a fixed ejector pin, a movable ejector pin, and a movable push rod. The base plate is disposed on the reverse side of the female mold. The ejector plate is disposed on the side of the base plate facing the female mold. The fixed ejector pin is disposed on the ejector plate and can penetrate the female mold and push the product. The movable ejector pin is disposed on the ejector plate and can penetrate the female mold and push the product. The movable ejector pin and the fixed ejector pin contact the product at different positions. The movable ejector pin can move relative to the ejector plate and has a first position and a second position. In the first position, the movable ejector pin is lower than the fixed ejector pin, and in the second position, the movable ejector pin is higher than the fixed ejector pin. The movable push rod can abut against the female mold and drive the movable ejector pin to switch between the first position and the second position.

[0007] Compared with the prior art, the ejection mechanism provided in this application uses an ejector plate with fixed ejector pins to push the product on the mold, initially separating the product from the mold. A movable ejector pin, switchable between a first and a second position, is also provided on the ejector plate. In the first position, the movable ejector pin is lower than the fixed ejector pin, and in the second position, it is higher than the fixed ejector pin. The fixed and movable ejector pins contact the product at different positions, allowing them to push the product from different locations. A movable push rod, which abuts against the mold, drives the movable ejector pin to switch between the first and second positions. Therefore, the ejection mechanism provided in this application uses a fixed ejector pin in one position for initial demolding of the product on the mold, and a movable ejector pin and push rod in another position for secondary demolding, separating the fixed ejector pin from the product. This breaks down the entire demolding process into two steps, and the different positions of the fixed and movable ejector pins reduce the stress time on the product at the same location, thus effectively demolding while avoiding localized deformation and damage caused by prolonged stress on the same location. In addition, the secondary ejection of the product allows it to be completely separated from the mother mold after the second ejection, achieving automatic detachment. This facilitates subsequent part removal and automates the production process, reduces unnecessary manual part removal and waiting time due to multiple ejection cycles, improves production efficiency, and reduces production costs.

[0008] Specifically, the movable push rod can swing relative to the ejector plate, and one end of the movable push rod is connected to the end of the movable ejector pin away from the female mold. The other end of the movable push rod can extend out of the ejector plate to abut against the female mold and swing relative to the ejector plate, thereby driving the movable ejector pin to switch between the first position and the second position.

[0009] Specifically, the movable push rod includes a pushing section and a connecting section. The connecting section is rotatably housed within the base plate, and its two ends are pivotally connected to the base plate. The pushing section is detachably connected to one end of the connecting section and can extend beyond the ejector plate to abut against the female mold. The end of the movable ejector pin away from the female mold is connected to the other end of the connecting section, so that the pushing section can drive the movable ejector pin to switch between the first position and the second position through the connecting section.

[0010] Specifically, the linkage section is pivotally connected to the substrate by a rotating pin, and the extension direction of the rotating pin is perpendicular to the direction in which the fixed ejector pin pushes the product.

[0011] Specifically, the ejection mechanism further includes an elastic element disposed between the ejector plate and the base plate, which is used to make the ejector plate tend to move closer to the master mold.

[0012] Specifically, the ejection mechanism further includes a return block, which is disposed on the base plate and is used to abut against the linkage section of the movable push rod to drive the movable push rod to reset.

[0013] Specifically, the ejector plate is also provided with a reset rod, which can extend into the female mold for positioning, and the reset rod is used to drive the ejector plate away from the female mold to reset.

[0014] Specifically, the ejection mechanism further includes a protective plate, which has a protective groove with one end open. The ejector plate and the base plate are housed in the protective groove, and the ejector plate can move within the protective groove.

[0015] Specifically, the circumferential wall of the ejector plate contacts the circumferential inner wall of the protective groove to allow for directional movement within the protective groove.

[0016] Specifically, the protection plate includes a main board and a cover plate detachably connected to the main board. The main board includes a through protective cavity, and the cover plate is used to cover one through opening of the protective cavity to form the protective groove. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is an assembly diagram of the ejection mechanism in the mold-closed state according to an embodiment of this application;

[0019] Figure 2 This is an exploded view of the ejection mechanism according to an embodiment of this application;

[0020] Figure 3 for Figure 1 A top-down view from one perspective;

[0021] Figure 4 for Figure 3 AA section view;

[0022] Figure 5 for Figure 3 BB cross-sectional view;

[0023] Figure 6 for Figure 1 A bottom view from the perspective of removing the master mold and protective plate;

[0024] Figure 7 for Figure 6 CC section view;

[0025] Figure 8 This is an exploded view of the return block of the ejector mechanism in an embodiment of this application when it pushes the movable push rod to reset.

[0026] The attached figures are labeled as follows:

[0027] 100-Ejection mechanism, 110-Base plate, 120-Ejector plate, 121-Fixed ejector pin, 122-Modible ejector pin, 130-Modible push rod, 131-Push section, 132-Linking section, 133-Rotating pin, 140-Elastic element, 150-Return block, 160-Positioning post, 170-Reset rod, 180-Angled ejector rod, 190-Protective plate, 191-Protective groove, 192-Main plate, 193-Cover plate, 200-Mother mold, 300-Product. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc. (if present), indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the embodiments of this application and for 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, they should not be construed as limitations on the embodiments of this application. Furthermore, the terms "first," "second," and "third" are used only for descriptive purposes such as distinguishing similar objects, and should not be construed as indicating or implying relative importance or order.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical 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 the embodiments of this application based on the specific circumstances.

[0031] Please see Figures 1-2To achieve the above objectives, the ejection mechanism 100 provided in this application includes a base plate 110, an ejector plate 120, a fixed ejector pin 121, a movable ejector pin 122, and a movable push rod 130. The base plate 110 is disposed on the reverse side of the female mold 200. The ejector plate 120 is disposed on the side of the base plate 110 facing the female mold 200. The fixed ejector pin 121 is disposed on the ejector plate 120 and can penetrate the female mold 200 to push the product 300. The movable ejector pin 122 is disposed on the ejector plate 120 and can penetrate the female mold 200. The ejector plate 120 pushes the product 300; the movable ejector pin 122 and the fixed ejector pin 121 contact the product 300 at different positions; the movable ejector pin 122 can move relative to the ejector plate 120, and the movable ejector pin 122 has a first position and a second position. In the first position, the movable ejector pin 122 is lower than the fixed ejector pin 121; in the second position, the movable ejector pin 122 is higher than the fixed ejector pin 121; the movable push rod 130 can abut against the mold 300 to drive the movable ejector pin 122 to switch between the first position and the second position. In this embodiment, in order to push the product 300 evenly, there are 5 movable ejector pins 122 and the movable ejector pins 122 are evenly distributed on the ejector plate 120. Similarly, the ejector plate 120 is provided with a plurality of fixed ejector pins 121 to push the product 300 evenly.

[0032] Furthermore, the movable push rod 130 can swing relative to the ejector plate 120, and one end of the movable push rod 130 is connected to the end of the movable ejector 122 away from the female mold 200. The other end of the movable push rod 130 can extend out of the ejector plate 120 to abut against the female mold 200 and swing relative to the ejector plate 120, thereby driving the movable ejector 122 to switch between the first position and the second position.

[0033] Further, please refer to Figures 6-8 The movable push rod 130 includes a pushing section 131 and a connecting section 132. The connecting section 132 is rotatably housed within the base plate 110, and its two ends are pivotally connected to the base plate 110. The pushing section 131 is detachably connected to one end of the connecting section 132 and can extend beyond the ejector plate 120 to abut against the female mold 200. The end of the movable ejector pin 122 away from the female mold 200 is connected to the other end of the connecting section 132, so that the pushing section 131 can drive the movable ejector pin 122 to switch between a first position and a second position through the connecting section 132. The detachable connection between the pushing section 131 and the connecting section 132 facilitates the replacement of pushing sections 131 of different sizes, thus making it suitable for products 300 of different sizes.

[0034] Furthermore, the linkage section 132 is pivotally connected to the base plate 110 by a rotating pin 133, the extension direction of which is perpendicular to the direction in which the fixed ejector pin 121 pushes the product 300.

[0035] Further, please refer to Figure 2 The ejection mechanism 100 also includes elastic elements 140, which are disposed between the ejector plate 120 and the base plate 110 to make the ejector plate 120 tend to move closer to the female mold 200. In this embodiment, the elastic elements 140 are compression springs, and there are five elastic elements 140, so as to provide elastic force to the ejector plate 120 at multiple points and improve the reliability of use.

[0036] Further, please refer to Figure 2 as well as Figures 6-8 The ejection mechanism 100 also includes a return block 150, which is disposed on the base plate 110 and abuts against the linkage section 132 of the movable push rod 130 to drive the movable push rod 130 to reset. Specifically, after the male mold (not shown in the figure) and the female mold 200 are closed, the ejector plate 120 is pressed back onto the base plate 110, and the return block 150 abuts against one end of the linkage section 132 to drive the linkage section 132 to rotate around the rotating pin 133, thereby causing the push section 131 to move closer to the female mold 200 and the movable ejector pin 122 to move away from the product 300. When the push section 131 and the movable ejector pin 122 return to their initial positions, the surface of the return block 150 facing the ejector plate 120 is also in contact with the surface of the linkage section 132 facing the base plate 110, at which point the linkage section 132 no longer rotates.

[0037] Further, please refer to Figure 5 and Figure 6 The base plate 110 is also provided with positioning posts 160, which penetrate the ejector plate 120 and are used to position the ejector plate 120 on the base plate 110. The ejector plate 120 can also move relative to the positioning posts 160. This arrangement allows the ejector plate 120 to move along the extension direction of the positioning posts 160 when it moves away from the base plate 110 and closer to the mold 200, thereby enabling the fixed ejector pins 121 and movable ejector pins 122 on the ejector plate 120 to accurately push the product 300 inside the mold core 210. In addition, the presence of the positioning posts 160 allows the ejector plate 120 to accurately reset during mold closing. In this embodiment, to improve the accuracy of positioning and guiding, the number of positioning posts 160 is 5.

[0038] Further, please refer to Figures 2-4 The ejector plate 120 is also provided with a reset rod 180 on the side facing the female mold 200. The reset rod 180 is used to drive the ejector plate 120 away from the female mold 200 to reset. Specifically, the reset rod 180 is fixed to the ejector plate 120. When the mold is closed, the male mold pushes the reset rod 180, so that the ejector plate 120 approaches the base plate 110 and is finally fitted and positioned on the base plate 110. Furthermore, the reset rod 180 can extend into the female mold 200 to position the ejector plate 120 in the female mold 200.

[0039] Further, please refer to Figure 2 and Figure 5 In order to make the product 300 with the side concave structure more easily demolded, the ejector plate 120 is also provided with an inclined ejector rod 180 on the side facing the mother mold 200. The inclined ejector rod 180 passes through the mother mold 200 at an angle and is used to eject the product 300 in the mother mold 200 at an angle.

[0040] Further, please refer to Figure 5 In order to ensure that the product 300 is subjected to uniform force, the ejector plate 120 is provided with inclined ejector rods 180 at both ends on the side facing the female mold 200.

[0041] Further, please refer to Figures 1-2 The ejection mechanism 100 also includes a protective plate 190, which has a protective groove 191 with one end open. The ejector plate 120 and the substrate 110 are housed in the protective groove 191, and the ejector plate 120 can move within the protective groove 191. This arrangement can cover the ejector plate 120 and the substrate 110, thereby preventing the entry of external foreign objects and improving the reliability of use.

[0042] Furthermore, the circumferential wall of the ejector plate 120 contacts the circumferential inner wall of the protective groove 191 to move directionally within the protective groove 191.

[0043] Furthermore, the protective plate 190 includes a main plate 192 and a cover plate 193 detachably connected to the main plate 192. The main plate 192 includes a through protective cavity, and the cover plate 193 is used to cover one through opening of the protective cavity to form a protective groove 191. This arrangement facilitates the removal of the base plate 110 and the ejector plate 120 from the protective groove 191. In addition, to make the overall mold aesthetically pleasing, the four sides of the main plate 192, the cover plate 193, and the female mold 200 are aligned, so that they can be positioned and assembled into a tightly fitting cuboid structure.

[0044] The following is a description of the working principle of the ejector mechanism 100 provided in this application.

[0045] After the product 300 cools and solidifies, the male mold separates from the female mold 200. When the male mold is completely separated from the female mold 200, the elastic element 140 drives the ejector plate 120 away from the base plate 110 and closer to the female mold 200. The fixed ejector 121 moves with the ejector plate 120. At this time, the movable ejector 122 is in the first position, so the movable ejector 122 is lower than the fixed ejector 121. At this time, only the fixed ejector 121 pushes the product 300 away from the female mold 200 for the initial demolding. As the ejector plate 121 gradually approaches the female mold... 200. The push section 131 of the movable push rod 130 gradually approaches the female mold 200. When the push section 131 abuts against the female mold 200, it retracts relative to the female mold 200, driving the connecting section 132 to rotate around the rotating pin 133. The connecting section 132 drives the movable ejector pin 122 to move forward relative to the female mold 200. The movable ejector pin 122 switches from the first position to the second position, and the movable ejector pin 122 is higher than the fixed ejector pin 121, thereby pushing the product 300 inside the female mold 200 for secondary demolding. When the product 300 completely leaves the female mold 200, the demolding of the product 300 is completed. When the mold is closed, the male mold approaches the female mold 200. When the male mold begins to contact the female mold 200, the male mold begins to push the reset rod 180, driving the ejector plate 120 to approach the base plate 110 to reset. After the male mold is fully connected and assembled with the female mold, the ejector plate 120 also returns to its initial position to be positioned and fitted with the base plate 110. The elastic element 140 is compressed again. At the same time, the linkage section 132 of the movable push rod 130 also abuts against the return block 160, so that the movable ejector 122 returns from the second position to the first position to reset.

[0046] Compared with the prior art, the ejection mechanism 100 provided in this application provides an ejector plate 120 and a fixed ejector pin 121 on the ejector plate 120 to push the product 300 on the female mold 200 to initially separate the product 300 from the female mold 200. A movable ejector pin 122 that can switch between a first position and a second position is provided on the ejector plate 120. The movable ejector pin 122 is lower than the fixed ejector pin 121 in the first position and higher than the fixed ejector pin 121 in the second position. The fixed ejector pin 121 and the movable ejector pin 122 contact the product 300 at different positions, so that the former two can push the product 300 from different positions. A movable push rod 130 that can abut against the female mold 200 is provided on the ejector plate 120 to drive the movable ejector pin 122 to switch between the first position and the second position. Therefore, the ejection mechanism 100 provided in this application performs initial demolding of the product on the female mold 200 by setting a fixed ejector pin 121 at one position, and then sets a movable ejector pin 122 and a movable push rod 130 at another position to perform secondary demolding of the product 300 on the female mold 200 and separate the fixed ejector pin 121 from the product 300. This decomposes the entire demolding process into two steps. Furthermore, the fixed ejector pin 121 and the movable ejector pin 122 push the product 300 at different positions, thereby reducing the stress time on the same position of the product 300. This effectively demolds the product 300 while preventing local deformation and damage caused by prolonged stress on the same position. In addition, the secondary ejection of the product 300 allows it to completely separate from the female mold 200 after the second ejection, achieving automatic detachment. This facilitates subsequent part removal and automates the production process, reducing unnecessary manual part removal and waiting time after multiple ejections, improving production efficiency, and reducing production costs.

[0047] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An ejection mechanism for ejecting an article from the front of a mold, characterized in that, include: A substrate for being disposed on the reverse side of the master mold; Ejector plate, used to be disposed on the side of the base plate facing the master mold; A fixed ejector pin is disposed on the ejector plate and is capable of penetrating the master mold and pushing the product. A movable ejector pin is disposed on the ejector plate and can penetrate the female mold and push the product; the movable ejector pin and the fixed ejector pin contact the product at different positions; the movable ejector pin can move relative to the ejector plate, and the movable ejector pin has a first position and a second position. In the first position, the movable ejector pin is lower than the fixed ejector pin, and in the second position, the movable ejector pin is higher than the fixed ejector pin. The movable push rod can abut against the female mold and is used to drive the movable ejector pin to switch between the first position and the second position.

2. The ejection mechanism as described in claim 1, characterized in that, The movable push rod can swing relative to the ejector plate, and one end of the movable push rod is connected to the end of the movable ejector away from the female mold. The other end of the movable push rod can extend out of the ejector plate to abut against the female mold and swing relative to the ejector plate, thereby driving the movable ejector to switch between the first position and the second position.

3. The ejection mechanism as described in claim 2, characterized in that, The movable push rod includes a pushing section and a connecting section. The connecting section is rotatably housed within the base plate, and its two ends are pivotally connected to the base plate. The pushing section is detachably connected to one end of the connecting section and can extend beyond the ejector plate to abut against the female mold. The end of the movable ejector pin away from the female mold is connected to the other end of the connecting section, so that the pushing section can drive the movable ejector pin to switch between the first position and the second position through the connecting section.

4. The ejection mechanism as described in claim 3, characterized in that, The linkage section is pivotally connected to the substrate by a rotating pin, the extension direction of which is perpendicular to the direction in which the fixed ejector pin pushes the product.

5. The ejection mechanism as described in claim 1, characterized in that, The ejection mechanism further includes an elastic element disposed between the ejector plate and the base plate, which is used to make the ejector plate tend to move closer to the master mold.

6. The ejection mechanism as described in claim 3, characterized in that, The ejection mechanism also includes a return block, which is disposed on the base plate and is used to abut against the linkage section of the movable push rod to drive the movable push rod to reset.

7. The ejection mechanism as described in claim 1, characterized in that, The ejector plate is also provided with a reset rod, which can extend into the female mold for positioning. The reset rod is used to drive the ejector plate away from the female mold to reset.

8. The ejection mechanism as described in claim 1, characterized in that, The ejection mechanism also includes a protective plate, which has a protective groove with one end open. The ejector plate and the base plate are housed in the protective groove, and the ejector plate can move within the protective groove.

9. The ejection mechanism as described in claim 8, characterized in that, The circumferential wall of the ejector plate contacts the circumferential inner wall of the protective groove to allow for directional movement within the protective groove.

10. The ejection mechanism as described in claim 8, characterized in that, The protection plate includes a main board and a cover plate detachably connected to the main board. The main board includes a through protective cavity, and the cover plate is used to cover one through opening of the protective cavity to form the protective groove.

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