Ejecting device and forming device

Abstract

An ejection device comprises a base provided with an accommodating cavity, a first vent hole communicated with the accommodating cavity and a second vent hole communicated with the accommodating cavity; the ejector pin is movably arranged in the containing cavity, the end, close to the first vent hole, of the ejector pin is in sealed connection with the cavity wall of the containing cavity, a cavity communicated with the first vent hole is formed in the end, close to the first vent hole, of the ejector pin, and the end, away from the first vent hole, of the ejector pin penetrates through the base and is used for corresponding to a forming cavity in a forming mold; the elastic piece is arranged in the containing cavity, and the two ends of the elastic piece abut against the base and the ejector pin respectively. According to the material ejecting device, circulation between gas in the material ejecting device and the outside can be achieved, heat of the ejector pin device is prevented from being generated in the circulation operation, therefore, formed products cannot be affected, and the yield of the formed products can be improved. The embodiment of the utility model further provides a forming device which comprises a forming die and the material ejecting device, and the material ejecting device is arranged in the forming die.

Description

Technical Field

[0001] The utility model relates to the technical field of forming molds, in particular to a material ejecting device and a forming device. Background Art

[0002] The ejector pin of a molding mold is a commonly used demoulding accessory of a molding mold, also known as a push rod or a center pin. It plays a very important role in the molding mold. It can stably eject the product from the cavity of the molding mold. Common types of ejectors include flat ejector pins, round ejector pins and support pins.

[0003] The current ejector device uses a thrust mechanism to push the ejector pin to eject the molded product. However, since the ejector device needs to be sealed, the gas generated in the ejector device cannot be discharged, which will continuously generate heat during the cycle operation, thus affecting the molded product. Utility Model Content

[0004] In view of the above situation, it is necessary to provide a material ejecting device and a molding device to realize the circulation of gas in the material ejecting device and the outside world.

[0005] The utility model provides an ejection device, comprising: a base, which is provided with a receiving cavity, a first vent hole connected to the receiving cavity, and a second vent hole connected to the receiving cavity; an ejector pin, which is movably arranged in the receiving cavity, wherein one end of the ejector pin close to the first vent hole is sealedly connected to the cavity wall of the receiving cavity, and one end of the ejector pin close to the first vent hole is provided with a cavity connected to the first vent hole, and one end of the ejector pin away from the first vent hole is penetrated through the base, and is used to correspond to the molding cavity in the molding mold to eject the product in the molding cavity; and an elastic member , arranged in the accommodating cavity, the two ends of the elastic member respectively abut against the base and the ejector pin; wherein, when the first vent hole is ventilated, the ejector pin can be pushed by the gas entering the cavity from the first vent hole, so that the end of the ejector pin away from the first vent hole passes through the base and the molding cavity to eject the product in the molding cavity and discharge the gas in the accommodating cavity through the second vent hole; when the first vent hole stops ventilating, the ejector pin is reset under the action of the elastic member and allows external gas to enter the accommodating cavity from the second vent hole.

[0006] In the above-mentioned ejection device, when the first vent hole is ventilated, the ejector pin can be pushed by the gas entering the cavity from the first vent hole, so that the end of the ejector pin away from the first vent hole passes through the base and the molding cavity of the molding mold to eject the product in the molding cavity and discharge the gas in the accommodating cavity to the outside through the second vent hole; when the first vent hole stops ventilating, the ejector pin can be reset under the action of the elastic member and allow the outside gas to enter the accommodating cavity from the second vent hole, so as to realize the circulation of the gas in the ejection device and the outside, prevent the ejector pin device from generating heat during the circulation operation, thereby not affecting the molded product, and is conducive to improving the yield of the molded product.

[0007] In some embodiments, the base includes a top plate, a bottom plate arranged opposite to the top plate, and a shell connected between the top plate and the bottom plate, the top plate is used to cooperate with the molding mold and the molding mold forms the molding cavity when the molding mold is closed, the ejector pin is passed through the top plate, the accommodating cavity is arranged in the shell, the second vent hole is opened on the side wall of the shell, and the first vent hole is opened on the bottom plate.

[0008] In some embodiments, a limiting hole is formed on the top plate, and one end of the ejector pin away from the first vent hole is passed through the limiting hole and is adapted to the shape of the limiting hole.

[0009] In some embodiments, an exhaust hole connected to the cavity is formed on the side wall of the end of the ejector away from the first vent hole, and the exhaust hole is sealedly connected to the hole wall of the limiting hole when the first vent hole is not ventilated. When the first vent hole is ventilated, the exhaust hole follows the end of the ejector away from the first vent hole through the base to exhaust the gas in the cavity to the outside.

[0010] In some embodiments, the ejector pin includes a sealing portion and an ejection portion, the sealing portion is sealingly connected to the cavity wall of the accommodating cavity, one end of the ejection portion is connected to the sealing portion, and one end of the ejection portion away from the sealing portion is penetrated through the limiting hole, wherein the cavity is opened in the sealing portion and the ejection portion, and the two ends of the elastic member are respectively abutted against the sealing portion and the top plate.

[0011] In some embodiments, the ejector pin further includes a flexible heat dissipation portion, and the flexible heat dissipation portion is disposed at an end of the ejection portion away from the sealing portion.

[0012] In some embodiments, the flexible heat dissipation portion includes a plurality of heat dissipation portions, and the plurality of heat dissipation portions are arranged at intervals on the ejection portion.

[0013] In some embodiments, the base further includes a guide member connected to the bottom plate and the top plate respectively, the guide member is passed through the sealing portion to guide the movement of the ejector pin, wherein the elastic member is sleeved on the guide member.

[0014] In some embodiments, the ejection device further includes a buffer component, which is disposed on the bottom plate and located on a side of the sealing portion away from the ejection portion, so as to buffer the ejector pin when the ejector pin moves toward the bottom plate.

[0015] The embodiment of the utility model further proposes a molding device, comprising a molding die and the ejecting device as described above, wherein the ejecting device is arranged in the molding die.

[0016] The above-mentioned molding device includes an ejection device. In the ejection device, when the first vent hole is ventilated, the ejector pin can be pushed by the gas entering the cavity from the first vent hole, so that the end of the ejector pin away from the first vent hole passes through the molding cavity of the base and the molding mold to eject the product in the molding cavity and discharge the gas in the accommodating cavity to the outside through the second vent hole; when the first vent hole stops ventilating, the ejector pin can be reset under the action of the elastic member and allow the outside gas to enter the accommodating cavity from the second vent hole, so as to realize the circulation of the gas in the ejection device and the outside, prevent the ejector pin device from generating heat during the circulation operation, thereby not affecting the molded product, and is conducive to improving the yield of the molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a forming device proposed in one embodiment of the utility model.

[0018] Figure 2 yes Figure 1 The cross-sectional structure diagram of the forming device along line II-II is shown in FIG.

[0019] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the molding device shown in FIG.

[0020] Figure 4 yes Figure 3 An enlarged schematic diagram of the molding device in region IV is shown in FIG.

[0021] Main component symbols

[0022] Molding device 100

[0023] Molding mold 10

[0024] Male model 101

[0025] Master mold 102

[0026] Molding cavity 11

[0027] Ejector device 20

[0028] Base 21

[0029] Accommodating chamber 211

[0030] First vent hole 212

[0031] Second vent hole 213

[0032] Top plate 214

[0033] Restriction hole 2141

[0034] Bottom plate 215

[0035] Housing 216

[0036] Guide 217

[0037] Ejector 22

[0038] Cavity 221

[0039] Exhaust hole 222

[0040] Sealing part 223

[0041] Ejector 224

[0042] Flexible heat dissipation part 225

[0043] Heat dissipation unit 2251

[0044] Elastic member 23

[0045] Buffer 24

[0046] Product 200 DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings.

[0051] Please also see Figure 1 and Figure 2 In one embodiment of the present application, a molding device 100 is provided, which is applied to the molding field of electronic products such as mobile phones, computers, watches, tablets, digital products, etc., and is used to mold products 200, such as mobile phone parts. Specifically, the molding device 100 includes a molding mold 10 and a material ejection device 20.

[0052] The molding die 10 includes a matching male mold 101 and a female mold 102 . The ejecting device 20 is disposed in the male mold 101 . When the male mold 101 and the female mold 102 are closed, the ejecting device 20 participates in and cooperates with the male mold 101 and the female mold 102 to form a molding cavity 11 .

[0053] The ejector device 20 includes a base 21, an ejector pin 22 and an elastic member 23. The base 21 is provided with a receiving cavity 211, a first vent hole 212 communicating with the receiving cavity 211 and a second vent hole 213 communicating with the receiving cavity 211. The receiving cavity 211 is a cylindrical cavity, and the first vent hole 212 and the second vent hole 213 are both cylindrical holes. The ejector pin 22 is movably arranged in the receiving cavity 211. One end of the ejector pin 22 close to the first vent hole 212 is sealedly connected to the cavity wall of the receiving cavity 211, and one end of the ejector pin 22 close to the first vent hole 212 is provided with a cavity 221 communicating with the first vent hole 212. One end of the ejector pin 22 away from the first vent hole 212 is penetrated through the base 21, and is used to correspond to the molding cavity 11 in the molding mold 10 to eject the product 200 in the molding cavity 11. The elastic member 23 is disposed in the accommodating cavity 211, and the two ends of the elastic member 23 are respectively in contact with the base 21 and the ejector pin 22. When the first vent hole 212 is ventilated, the ejector pin 22 can be pushed by the gas entering the cavity 221 from the first vent hole 212, so that the end of the ejector pin 22 away from the first vent hole 212 passes through the base 21 and the molding cavity 11, so as to eject the product 200 in the molding cavity 11, and discharge the gas in the accommodating cavity 211 to the outside through the second vent hole 213; when the first vent hole 212 stops ventilating, the ejector pin 22 is reset under the action of the elastic member 23 and the outside gas enters the accommodating cavity 211 from the second vent hole 213.

[0054] In the ejection device 20, when the first vent hole 212 is ventilated, the ejector pin 22 can be pushed by the gas entering the cavity 221 from the first vent hole 212, so that the end of the ejector pin 22 away from the first vent hole 212 passes through the base 21 and the molding cavity 11 of the molding mold 10, so as to eject the product 200 in the molding cavity 11, and discharge the gas in the accommodating cavity 211 to the outside through the second vent hole 213; when the first vent hole 212 stops ventilating, the ejector pin 22 can be reset under the action of the elastic member 23 and allow the external gas to enter the accommodating cavity 211 from the second vent hole 213, so as to realize the circulation of the gas in the ejection device 20 and the outside, and prevent the ejector pin 22 from generating heat during the circulation operation, so as not to affect the molded product 200, which is beneficial to improve the yield of the molded product 200.

[0055] Please also see Figure 3The base 21 includes a top plate 214, a bottom plate 215 arranged opposite to the top plate 214, and a shell 216 connected between the top plate 214 and the bottom plate 215. The top plate 214 is in a rectangular parallelepiped shape, and is used to cooperate with the molding mold 10 and form a molding cavity 11 when the molding mold 10 is molded, wherein one end of the ejector pin 22 is penetrated through the top plate 214; the shell 216 is in a cylindrical shape, and the accommodating cavity 211 is arranged in the shell 216, and the second vent hole 213 is multiple and circumferentially opened on the side wall of the shell 216 to reduce the pressure in the accommodating cavity 211; the bottom plate 215 is in a rectangular parallelepiped shape, and the first vent hole 212 is opened in the middle of the bottom plate 215 and is arranged corresponding to the cavity 221 of the ejector pin 22.

[0056] A limiting hole 2141 is provided on the top plate 214. The limiting hole 2141 is a cylindrical hole. One end of the ejector pin 22 away from the first vent hole 212 is passed through the limiting hole 2141 and matches the shape of the limiting hole 2141. In this way, the limiting hole 2141 can limit the ejector pin 22 to prevent the ejector pin 22 from shaking when moving.

[0057] An exhaust hole 222 communicating with the cavity 221 is provided on the side wall of the end of the ejector 22 away from the first vent hole 212. The exhaust holes 222 are multiple and are arranged in an annular shape on the ejector 22. When the first vent hole 212 is not ventilated, the exhaust hole 222 is sealed and connected to the hole wall of the limiting hole 2141. When the first vent hole 212 is ventilated, the exhaust hole 222 follows the end of the ejector 22 away from the first vent hole 212 through the base 21 to discharge the gas in the cavity 221 to the outside. In this way, when the first vent hole 212 is ventilated, the exhaust hole 222 follows the end of the ejector 22 away from the first vent hole 212 through the base 21 to discharge the gas in the cavity 221 to the outside, so that the moving speed of the ejector 22 is reduced, thereby reducing the impact of the ejector 22 on the product 200.

[0058] The ejector pin 22 includes a sealing portion 223 and an ejector portion 224. The sealing portion 223 is disc-shaped and sealedly connected to the cavity wall of the accommodating cavity 211. The ejector portion 224 is cylindrical, and the outer diameter of the ejector portion 224 is smaller than the outer diameter of the sealing portion 223. One end of the ejector portion 224 is connected to the sealing portion 223, and one end of the ejector portion 224 away from the sealing portion 223 is penetrated through the limiting hole 2141, wherein the cavity 221 is opened between the sealing portion 223 and the ejector portion 224, and the two ends of the elastic member 23 are respectively abutted against the sealing portion 223 and the top plate 214. In this embodiment, the elastic member 23 is a spring.

[0059] The base 21 further includes a guide member 217 connected to the bottom plate 215 and the top plate 214 respectively. The guide member 217 is two columnar structures. The guide member 217 is inserted into the sealing portion 223 to guide the movement of the ejector pin 22, wherein the elastic member 23 is sleeved on the guide member 217. In this way, the ejection portion 224 and the sealing portion 223 can be guided respectively by the limiting hole 2141 and the guide member 217, and the guiding effect is better.

[0060] The ejection device 20 further includes a buffer 24, which is disposed on the bottom plate 215 and located on the side of the sealing portion 223 away from the ejection portion 224, so as to buffer the ejector pin 22 when the ejector pin 22 moves toward the bottom plate 215. In this way, the ejector pin 22 can be prevented from directly contacting the bottom plate 215 and causing scratches. In this embodiment, the buffer 24 is a sealing ring.

[0061] Please also see Figure 4 The ejector pin 22 further includes a flexible heat dissipation portion 225, which is disposed at one end of the ejection portion 224 away from the sealing portion 223. In this embodiment, the flexible heat dissipation portion 225 is made of a flexible material, such as rubber. In this way, the flexible heat dissipation portion 225 can flexibly contact the product 200.

[0062] Specifically, the flexible heat dissipation portion 225 includes a plurality of heat dissipation portions 2251, which are cylindrical in this embodiment or prism-shaped, and are evenly spaced on the ejection portion 224. In this way, the provision of the plurality of heat dissipation portions 2251 can not only increase the heat dissipation area of ​​the contact surface between the ejector pin 22 and the product 200, but also reduce the risk of damage to the product 200.

[0063] The implementation process of the molding device 100 of the embodiment of the utility model is as follows:

[0064] When demolding is required, air is ventilated from the first vent hole 212, and the ejector pin 22 is pushed by the gas entering the cavity 221 from the first vent hole 212, and moves under the action of the limiting hole 2141 and the guide member 217, so that the end of the ejector pin 22 away from the first vent hole 212 passes through the base 21 and the molding cavity 11, and the product 200 in the molding cavity 11 is ejected, and the gas in the accommodating cavity 211 is discharged to the outside through the second vent hole 213, wherein the exhaust hole 222 is located in the first vent hole 213. When the air hole 212 is ventilated, the end of the ejector pin 22 that moves away from the first air hole 212 passes through the base 21 to discharge the gas in the cavity 221 to the outside, so that the moving speed of the ejector pin 22 is reduced, thereby reducing the impact of the ejector pin 22 on the product 200; after demolding, the first air hole 212 stops ventilating, and the ejector pin 22 is reset under the action of the elastic member 23 and allows the external gas to enter the accommodating cavity 211 from the second air hole 213, thereby realizing the circulation of the gas in the ejection device 20 and the outside.

[0065] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0066] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A material ejection device, characterized in that: include: The base is provided with a receiving cavity, a first vent hole communicating with the receiving cavity, and a second vent hole communicating with the receiving cavity; An ejector pin is movably disposed in the accommodating cavity, one end of the ejector pin close to the first vent hole is sealedly connected to the cavity wall of the accommodating cavity, and one end of the ejector pin close to the first vent hole is provided with a cavity connected to the first vent hole, and one end of the ejector pin away from the first vent hole is penetrated through the base, and is used to correspond to the molding cavity in the molding mold to eject the product in the molding cavity; An elastic member is disposed in the accommodating cavity, and two ends of the elastic member are respectively in contact with the base and the ejector pin; Wherein, when the first vent hole is ventilated, the ejector pin can be pushed by the gas entering the cavity from the first vent hole, so that the end of the ejector pin away from the first vent hole passes through the base and the molding cavity to eject the product in the molding cavity and discharge the gas in the accommodating cavity through the second vent hole; when the first vent hole stops ventilating, the ejector pin is reset under the action of the elastic member and allows external gas to enter the accommodating cavity from the second vent hole.

2. The ejecting device according to claim 1, characterized in that: The base includes a top plate, a bottom plate arranged opposite to the top plate, and a shell connected between the top plate and the bottom plate, the top plate is used to cooperate with the forming mold and form the forming cavity when the forming mold is closed, the ejector pin is passed through the top plate, the accommodating cavity is arranged in the shell, the second vent hole is opened on the side wall of the shell, and the first vent hole is opened on the bottom plate.

3. The ejecting device according to claim 2, characterized in that: The top plate is provided with a limiting hole, and one end of the ejector pin away from the first vent hole is passed through the limiting hole and is adapted to the shape of the limiting hole.

4. The ejecting device according to claim 3, characterized in that: An exhaust hole connected to the cavity is formed on the side wall of the end of the ejector away from the first vent hole. The exhaust hole is sealed and connected to the hole wall of the limiting hole when the first vent hole is not ventilated. When the first vent hole is ventilated, the exhaust hole follows the end of the ejector away from the first vent hole and passes through the base to exhaust the gas in the cavity to the outside.

5. The ejecting device according to claim 3, characterized in that: The ejector pin includes a sealing portion and an ejection portion, wherein the sealing portion is sealingly connected to the cavity wall of the accommodating cavity, one end of the ejection portion is connected to the sealing portion, and one end of the ejection portion away from the sealing portion is penetrated through the limiting hole, wherein the cavity is opened in the sealing portion and the ejection portion, and the two ends of the elastic member are respectively abutted against the sealing portion and the ejector plate.

6. The ejecting device according to claim 5, characterized in that: The ejector pin further comprises a flexible heat dissipation portion, and the flexible heat dissipation portion is arranged at one end of the ejection portion away from the sealing portion.

7. The ejecting device according to claim 6, characterized in that: The flexible heat dissipation portion includes a plurality of heat dissipation portions, and the plurality of heat dissipation portions are arranged at intervals on the ejection portion.

8. The ejecting device according to claim 5, characterized in that: The base further comprises a guide member connected to the bottom plate and the top plate respectively, the guide member is arranged through the sealing portion to guide the movement of the ejector pin, wherein the elastic member is sleeved on the guide member.

9. The ejecting device according to claim 5, characterized in that: The ejection device further comprises a buffer member, which is arranged on the bottom plate and located at a side of the sealing portion away from the ejection portion, so as to buffer the ejector pin when the ejector pin moves toward the bottom plate.

10. A molding device, characterized in that: It comprises a forming die and a material ejecting device as described in any one of claims 1 to 9, wherein the material ejecting device is arranged in the forming die.

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