A mold ejection device

Abstract

The application relates to the field of injection molds, in particular to a mold ejection device, wherein the mold ejection device comprises a bottom plate, a first matching plate, a second matching plate and a plurality of slider assemblies, the plurality of slider assemblies are evenly arranged on the first matching plate, a static mold head is provided with a dynamic mold head at one end away from the bottom wall, the plurality of slider assemblies can move to a direction close to the static mold head by a predetermined distance to form a columnar structure, the columnar structure has a cavity with an opening, one end of the static mold head and the dynamic mold head close to each other is arranged in the cavity, thereby jointly forming an injection cavity, and the side plate forming the injection cavity is further provided with a plurality of evenly arranged blade grooves. The mold ejection device can effectively utilize the structural configuration to realize the advantages of simple structure, mold cavity formed by the front-back movement of the plurality of sliders and convenient demolding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection mold, more particularly to a mold ejection device. BACKGROUND

[0002] Injection molding is a process in which plastic is first added to the heated cylinder of the injection machine, the plastic is heated and melted, and under the push of the screw or plunger of the injection machine, it enters the mold cavity through the nozzle and mold pouring system, and is hardened and shaped into an injection molded product due to physical and chemical effects. Injection molding consists of a cycle period with injection, pressure maintaining and plastic part demolding processes, so injection molding has the characteristics of periodicity. The existing technology for injection molding of fan products is usually complex in structure, such as the patent application number CN201621051625.1, the patent name is "a fan injection molding mold", which includes device body, glue injection port, front mold, rear mold, rear mold cooling water port, cavity inductor, front mold cooling water port, glue injection runner, cooling water pipe and cavity, the outer surface of the front mold is provided with front mold cooling water port; the front mold cooling water port is fixedly connected with the cooling water pipe; the front mold is electrically connected with the cavity inductor; the lower end of the glue injection runner is connected with the cavity gap; the front mold is hinged with the rear mold through guide column; the upper end of the rear mold is provided with guide sleeve; the rear mold is provided with rear mold cooling water port; the controller is electrically connected with the cavity inductor; the upper end of the push plate is hinged with the spring; the upper end of the spring is fixedly connected with the ejector pin fixed plate; the upper end of the ejector pin fixed plate is connected with the ejector pin, but the above scheme is very complex in structure, which will directly lead to a large increase in mold opening cost, and the problem of how to effectively demold the fan product due to the complexity of the mold cavity will also lead to a large increase in the cost of mold opening, and it is also a problem to ensure effective opening and closing after a long time operation, therefore, there is a need to provide a mold ejection device which is simple in structure, composed of a mold cavity by moving the front and rear of multiple sliders and convenient to demold. SUMMARY

[0003] The main purpose of the present application is to provide a mold ejection device, which can effectively utilize its own structure configuration to realize the advantages of composing a mold cavity by moving the front and rear of multiple sliders and convenient demolding.

[0004] Another object of the present application is to provide a mold ejection device, wherein the mold ejection device comprises a base plate, one side of the base plate has a first mounting hole and a plurality of evenly distributed positioning holes, the first mounting hole is located at the center of the base plate, and a plurality of positioning holes are located at the periphery of the mounting hole; a first matching plate is fixed on one side of the base plate provided with the first mounting hole, and the first matching plate also has a second mounting hole opposite the first mounting hole; a second matching plate is fixed on one side of the base plate provided with the mounting hole, and the first matching plate also has a third mounting hole, and the first matching plate is arranged in the second mounting hole; a plurality of slider assemblies are evenly arranged on the first matching plate, and the plurality of slider assemblies are matched with the second matching plate, wherein a static mold head is also arranged in the mounting hole, one end of the static mold head is fixed in the first mounting hole, the other end passes through the second mounting hole and is arranged outside, and the end of the static mold head away from the base wall is provided with a dynamic mold head, in addition, the plurality of slider assemblies can move a predetermined distance towards the static mold head to form a columnar structure, and the columnar structure has a cavity with an opening, and the ends of the static mold head and the dynamic mold head away from each other are arranged in the cavity, thereby forming a glue injection cavity together. The side plate forming the glue injection cavity also has a plurality of evenly distributed blade grooves, wherein the slider assembly comprises a plurality of modules that can move forward and backward, that is, when the plurality of modules are arranged together, the glue injection cavity can be formed, so that after the glue injection is completed, the fan blade structure can be formed, and when the plurality of sliders move away from each other, the product can be directly separated from the glue injection cavity.

[0005] Another object of the present application is to provide a mold ejection device, wherein the mold ejection device has simple structure and convenient operation, does not involve complex manufacturing process and expensive materials, has high economic efficiency, and is easy to popularize and use.

[0006] In order to achieve the above at least one object of the present application, the present application provides a mold ejection device, wherein the mold ejection device comprises:

[0007] A base plate, one side of the base plate has a first mounting hole and a plurality of evenly distributed positioning holes, the first mounting hole is located at the center of the base plate, and a plurality of positioning holes are located at the periphery of the mounting hole;

[0008] A first matching plate is fixed on one side of the base plate provided with the first mounting hole, and the first matching plate also has a second mounting hole opposite the first mounting hole;

[0009] A second matching plate is fixed on the side of the bottom plate with the mounting hole, and the second matching plate also has a third mounting hole, and the first matching plate is arranged in the third mounting hole;

[0010] A plurality of slider assemblies are arranged on the first matching plate in a uniform manner, and the plurality of slider assemblies are matched with the second matching plate, wherein a static mold head is arranged in the mounting hole, one end of the static mold head is fixed in the first mounting hole, the other end of the static mold head passes through the second mounting hole and is arranged outside, and the end of the static mold head away from the bottom wall is provided with a dynamic mold head, and the plurality of slider assemblies can move in the direction close to the static mold head by a predetermined distance to form a columnar structure, and the columnar structure has a cavity with an opening, and the end of the static mold head and the dynamic mold head close to each other are arranged in the cavity, thereby forming a glue injection cavity together, and the side plate forming the glue injection cavity is also provided with a plurality of blade grooves arranged in a uniform manner.

[0011] In one or more embodiments of the present application, each of the slider assemblies comprises a slider and a module arranged on the slider, and the slider is movably arranged on the first matching plate.

[0012] In one or more embodiments of the present application, the bottom of the first matching plate has a plurality of first sliding grooves arranged in a uniform manner, and the plurality of first sliding grooves are located on the circumferential side of the second mounting hole, and the bottom wall forming the first sliding groove also has a second sliding groove, the size of the second sliding groove is smaller than the size of the first sliding groove, and the slider is slidably arranged in the first sliding groove, the module is arranged on the upper side of the first matching plate, and the bottom of the module has a protruding part, the protruding part is slidably arranged in the second sliding groove, and the bottom of the protruding part is fixedly connected with the top of the slider.

[0013] In one or more embodiments of the present application, each of the slider assemblies comprises a connecting rod, one end of the connecting rod is matched with the slider, the end of the slider also has a clamping groove, the end of the connecting rod has a connecting part matched with the clamping groove, and the connecting part is arranged to be matched with the clamping groove.

[0014] In one or more embodiments of the present application, the first sliding slot and the wall surface away from the static mold head further have a first insertion hole, and the wall surface forming the third mounting hole further has a plurality of uniformly distributed stepped holes, the first insertion hole and the stepped hole corresponding to each other, the first insertion hole being in communication with the first sliding slot and the corresponding stepped hole, the outer wall of the second matching plate further having a plurality of uniformly distributed mounting grooves, the mounting groove and the stepped hole corresponding to each other, and the bottom wall forming the mounting groove further having a first oil hole in communication with the stepped hole, wherein the end of the connecting rod away from the sliding block sequentially passes through the first insertion hole and the stepped hole and is placed in the first oil hole.

[0015] In one or more embodiments of the present application, the end of the connecting rod placed in the first oil hole has a plug, and the plug has two oppositely arranged annular protrusions, and a first rubber sleeve is sleeved between the two annular protrusions.

[0016] In one or more embodiments of the present application, a second rubber sleeve is further arranged in the stepped hole, the connecting rod passes through the first rubber sleeve, a cover plate is further fixed in the mounting groove, the cover plate further has an insertion part on the side facing the first oil hole, the insertion part is inserted into the first oil hole, and a second rubber sleeve is further sleeved on the insertion part.

[0017] In one or more embodiments of the present application, the wall surface forming the first oil hole further has a second oil hole between the plug and the first rubber sleeve, and the wall surface forming the first oil hole further has a third oil hole, the third oil hole being close to the mounting groove and between the cover plate and the plug.

[0018] In one or more embodiments of the present application, the side facing the first matching plate further has a first annular groove and a second annular groove, the first annular groove being located in the second annular groove and being spaced apart from the second annular groove by a predetermined distance, the second oil hole being in communication with the first annular groove, and the third oil hole being in communication with the second annular groove, the bottom wall forming the first annular groove further having a fourth oil hole, and the bottom wall forming the second annular groove further having a fifth oil hole, and the other end of the fifth oil hole and the fourth oil hole being located on the side wall of the bottom wall. BRIEF DESCRIPTION OF DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 FIG. 1 shows a structural schematic diagram of a mold ejection device.

[0021] Figure 2 The figure shows a schematic structural diagram of the base plate.

[0022] Figure 3 The figure shows an enlarged view of a portion of the base plate.

[0023] Figure 4 The diagram shows a partial structural diagram of a mold ejection device Figure 1 .

[0024] Figure 5 The figure shows a schematic structural diagram of the second matching plate.

[0025] Figure 6 The figure shows a schematic structural diagram of the third matching plate.

[0026] Figure 7 The figure shows a partial cross-sectional structural schematic diagram of the third matching plate.

[0027] Figure 8 The figure shows a schematic diagram of the bottom structure of the third matching plate.

[0028] Figure 9 The figure shows a schematic structural diagram of the slider assembly.

[0029] Figure 10 The diagram shows a partial structural diagram of a mold ejection device Figure 2 .

[0030] Figure 11 The diagram shows a partial structural diagram of a mold ejection device Figure 3 .

[0031] Figure 12 The diagram shows an enlarged view of a portion of the structure of a mold ejection device. Figure 1 .

[0032] Figure 13 The figure shows a partial structural cross-sectional view of a mold ejection device.

[0033] Figure 14 The figure shows a schematic structural diagram of the static die head.

[0034] Figure 15 The figure shows a schematic structural diagram of the cover.

[0035] Figure 16 The diagram shows an enlarged view of a portion of the structure of a mold ejection device. Figure 2 . DETAILED DESCRIPTION

[0036] The terms and words used in the following description and claims are not limited to the literal meanings and are only used to enable a clear and consistent understanding of the application by the present inventors. Accordingly, it is apparent that the following description of various embodiments of the present application is provided only for the purpose of illustration and understanding of the present application, and without intent to limit the application as defined by the appended claims and their equivalents.

[0037] It is understood that the term "one" is understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, while in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0038] Although ordinal numbers such as "first", "second", etc. will be used to describe various components, they are not limited to those components. The terms are only used to distinguish one component from another component. For example, a first component can be called a second component, and likewise, a second component can also be called a first component without departing from the teachings of the inventive concept. The term "and / or" used herein includes any and all combinations of one or more associated listed items.

[0039] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly dictates otherwise. In addition, it will be understood that the terms "comprise" and / or "have" when used in this specification specify the presence of stated features, numbers, steps, operations, components, elements or a combination thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0040] Reference Figures 1 to 16 , according to a preferred embodiment of the present application, the mold ejection device has a structure as shown in Figure 1 , which includes a bottom plate 10, one side of the bottom plate 10 has a first mounting hole 101 and a plurality of evenly distributed positioning holes 102, the first mounting hole 101 is located at the center of the bottom plate 10, and a plurality of positioning holes 102 are located on the side of the mounting hole.

[0041] It is worth mentioning that the mold ejection device further includes a first matching plate 20, the first matching plate 20 is fixed on the side of the bottom plate 10 provided with the first mounting hole 101, and the first matching plate 20 also has a second mounting hole 201, the second mounting hole 201 is opposite to the first mounting hole 101, and the size of the second mounting hole 201 is smaller than the size of the first mounting hole 101. In addition, the above-mentioned first matching plate 20 is matched with a plurality of positioning holes 102 through a plurality of external bolts to fix the position of the first matching plate 20.

[0042] It is worth mentioning that the mold ejection device further comprises a second matching plate 30, the second matching plate 30 is fixed on the side of the bottom plate 10 provided with the mounting hole, and the second matching plate 30 is further provided with a third mounting hole 301, and the first matching plate 20 is arranged in the third mounting hole 301. It should be noted that the third mounting hole 301 is implemented as a polygon in order to limit the position of the first matching plate 20.

[0043] It is worth mentioning that the mold ejection device further comprises a plurality of slider assemblies 40, and the plurality of slider assemblies 40 are evenly arranged on the first matching plate 20 and matched with the second matching plate 30. Specifically, the first mounting hole 101 is further provided with a static mold head 100, one end of the static mold head 100 is fixed in the first mounting hole 101, and the other end penetrates through the second mounting hole 201 and is arranged outside. It should be noted that the bottom wall forming the first mounting hole 101 is provided with two opposite fixing holes, and the static mold head 100 can be matched with the two fixing holes through external fixing members, so as to limit the position of the static mold head 100. It should be understood by those skilled in the art that the end of the static mold head 100 away from the bottom wall is provided with a dynamic mold head 200, that is, the dynamic mold head 200 can move a predetermined distance towards the static mold head 100 until the static mold head 100 is spaced a predetermined distance, and the plurality of slider assemblies 40 can move a predetermined distance towards the static mold head 100 to form a columnar structure 300, and the columnar structure 300 has a cavity with an opening, and the ends of the static mold head 100 and the dynamic mold head 200 close to each other are arranged in the cavity, thereby forming a glue injection cavity 3001. It should be understood by those skilled in the art that the external glue injection head directly abuts against the end of the dynamic mold head 200 away from the static mold head 100 and enters the injection cavity through the dynamic mold head 200 to form a fan structure as shown in Figure 11 It is worth mentioning that the side plate forming the glue injection cavity 3001 is further provided with a plurality of evenly arranged blade grooves 3002.

[0044] Specifically, each of the slider assemblies 40 comprises a slider 41 and a module 42 arranged on the slider 41, and the slider 41 is movably arranged at the first matching plate 20. The bottom of the first matching plate 20 is provided with a plurality of first sliding grooves 202 arranged uniformly, and the plurality of first sliding grooves 202 are located at the periphery of the second mounting hole 201, and the bottom wall of the first sliding groove 202 is further provided with a second sliding groove 203, and the size of the second sliding groove 203 is smaller than that of the first sliding groove 202. That is, the slider 41 is slidably arranged in the first sliding groove 202. It is worth mentioning that the module 42 is arranged on the upper side of the first matching plate 20, and the bottom of the module 42 is provided with a protruding portion 421, the protruding portion 421 is slidably arranged in the second sliding groove 203, and the bottom of the protruding portion 421 is fixedly connected with the top of the slider 41, and the connection mode is as shown in Figure 12 , at least two external bolts pass through the slider 41 and cooperate with the protruding portion 421 to fix the protruding portion 421 and the slider 41 together, that is, when the slider 41 moves, the module 42 arranged on the slider 41 moves synchronously, and it is worth noting that the first sliding groove 202 is arranged in a ring array.

[0045] The structure of the module 42 is as shown in Figure 9 , and when the plurality of modules 42 move towards the direction of the static mold head 100, the plurality of modules 42 are arranged and combined with the columnar structure 300, and when the fan blades in the glue injection cavity 3001 are formed, the plurality of modules 42 can move a predetermined distance away from the static mold head 100 through the corresponding slider 41, so that the module 42 does not block the formed fan blades, so as to facilitate the external mechanical hand to take out the fan blades.

[0046] It is worth mentioning that each of the slider assemblies 40 comprises a connecting rod 43, one end of the connecting rod 43 cooperates with the slider 41, and the connection mode is as shown in Figure 9 , specifically, the end of the slider 41 is further provided with a clamping groove 4101, and the structure of the clamping groove 4101 is as shown in Figure 9As shown, the end of the connecting rod 43 has a connecting part 431 matched with the clamping groove 4101, which is arranged to be matched with the clamping groove 4101 so that the connecting rod 43 can drive the slider 41 to move. Specifically, the wall surface forming the first sliding groove 202 and away from the static mold head 100 also has a first insertion hole 204, and the wall surface forming the third mounting hole 301 has a plurality of uniformly distributed stepped holes 302. The first insertion hole 204 and the stepped hole 302 correspond to each other, that is, the first insertion hole 204 is in communication with the first sliding groove 202 and the corresponding stepped hole 302. Among them, the outer wall of the second matching plate 30 also has a plurality of uniformly distributed mounting grooves 303, and the mounting groove 303 and the stepped hole 302 correspond to each other, and the bottom wall forming the mounting groove 303 has a first oil hole 304, and the first oil hole 304 is also in communication with the stepped hole 302, that is, the end of the connecting rod 43 away from the slider 41 passes through the first insertion hole 204 and the stepped hole 302 in turn, and is placed in the first oil hole 304.

[0047] It should be noted that, as shown in the drawings, Figure 9 The end of the connecting rod 43 placed in the first oil hole 304 has a plug 432, which is arranged to be extruded by the oil in the first oil hole 304 to move a predetermined distance towards or away from the stepped hole 302, and the structure of the plug 432 is two oppositely arranged annular protrusions, and a first rubber sleeve is sleeved between the two annular protrusions. Specifically, the stepped hole 302 also has a second rubber sleeve, and the connecting rod 43 also passes through the first rubber sleeve, and the mounting groove 303 also has a cover plate 44 fixed therein, and one side of the cover plate 44 towards the first oil hole 304 also has an insertion part 441 which can be inserted into the first oil hole 304, and a second rubber sleeve is also sleeved on the insertion part 441, that is, the first oil hole 304 is closed at both ends by the cover plate 44 and the first rubber sleeve, and the plug 432 and the first rubber sleeve are also spaced apart by a predetermined distance.

[0048] It is worth mentioning that the wall surface forming the first oil hole 304 also has a second oil hole 305, which is located between the plug 432 and the first rubber sleeve, that is, the external oil is arranged to enter the first oil hole 304 through the second oil hole 305, and extrude the end of the plug 432 towards the first rubber sleeve, so that the plug 432 moves a predetermined distance towards the cover plate 44.

[0049] In addition, it is necessary to point out that the wall surface forming the first oil hole 304 also has a third oil hole 306, the structure of which is as shown in Figure 7 , that is, the external oil can enter the first oil hole 304 through the third oil hole 306, and the third oil hole 306 is also close to the mounting groove 303, that is, between the cover plate 44 and the plug 432.

[0050] As shown in the bottom plate 10 structure shown in Figure 3 , the side facing the first matching plate 20 also has a first annular groove 103 and a second annular groove 104, the first annular groove 103 is located in the second annular groove 104 and is spaced apart from the second annular groove 104 by a predetermined distance, that is, the size of the first annular groove 103 is smaller than the size of the second annular groove 104, and the plurality of second oil holes 305 are all connected with the first annular groove 103, and the plurality of third oil holes 306 are also all connected with the second annular groove 104. In addition, the bottom wall forming the first annular groove 103 has a fourth oil hole 105, and the bottom wall forming the second annular groove 104 has a fifth oil hole 106, that is, the external oil can enter the first annular groove 103 or the second annular groove 104 through the fourth oil hole 105 or the fifth oil hole 106, and vice versa. Specifically, the other end of the fifth oil hole 106 and the fourth oil hole 105 is located in the side wall of the bottom wall, and the external oil pipe is directly connected to the corresponding hole position. It is worth mentioning that the above-mentioned second oil hole and third oil hole can be formed in the form of a rod structure 500 as shown in Figure 16 .

[0051] It is necessary to point out that the above-mentioned static die head 100 placed at the end of the glue injection cavity 3001 also has a spiral cavity 3003, and the bottom wall forming the spiral cavity 3003 also has a first through hole 3004, and a top rod 400 is placed in the through hole 3004, and the bottom wall forming the first mounting hole also has a second through hole, the first through hole communicates with the second through hole, that is, the above-mentioned fixed rod can move in the first through hole and the second through hole. Wherein those skilled in the art should understand that the above-mentioned top rod 400 is arranged to move forward and backward by a predetermined distance to eject the fan blade placed at the glue injection cavity 3001, and it is necessary to point out that the above-mentioned second through hole should have another ejecting rod, and cooperate with the above-mentioned top rod to drive the forward and backward movement of the top rod.

[0052] In summary, the mold ejection device based on the embodiments of the present application is illustrated, which provides the mold ejection device with the advantages of simple structure, forming a mold cavity by moving a plurality of sliders forward and backward, and convenient demolding.

[0053] It is worth mentioning that the mold ejection device in the embodiment of the present application has simple structure, does not involve complex manufacturing process and expensive materials, and has higher economy. Meanwhile, the mold ejection device provided by the present application is easy to produce and has low cost for the manufacturer, which is more conducive to controlling the production cost, and is further conducive to product promotion and use.

[0054] It should be understood by those skilled in the art that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application have been shown and described in the embodiments, and the embodiments of the present application can be any modification or modification without departing from the principle.

Claims

1. A mold ejection device, characterized in that: The mold ejection device comprises: A bottom plate, having a first mounting hole and a plurality of evenly distributed positioning holes on one side of the bottom plate, wherein the first mounting hole is located at the center of the bottom plate, and the plurality of positioning holes are located around the mounting hole; a first mating plate, the first mating plate being fixed to a side of the bottom plate where the first mounting hole is provided, and the first mating plate further having a second mounting hole, the second mounting hole being opposite to the first mounting hole; a second mating plate, the second mating plate being fixed to a side of the bottom plate where the mounting hole is provided, and the second mating plate further having a third mounting hole, the first mating plate being provided in the third mounting hole; A plurality of slider assemblies, wherein the plurality of slider assemblies are evenly arranged on the first matching plate, and the plurality of slider assemblies are also matched with the second matching plate, wherein a static die head is also installed in the one mounting hole, one end of the static die head is fixed in the first mounting hole, and the other end passes through the second mounting hole and is placed outside, and a movable die head is provided at the end of the static die head away from the bottom wall, and the plurality of slider assemblies can move a predetermined distance in the direction close to the static die head to form a columnar structure, and the columnar structure has a cavity with an opening, and the ends of the static die head and the movable die head close to each other are both provided in the cavity, thereby jointly forming a glue injection cavity, and the side plate forming the glue injection cavity also has a plurality of evenly arranged 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

2. The mold ejection device according to claim 1, wherein each of the slider assemblies includes a connecting rod, one end of the connecting rod cooperates with the slider, the end of the slider also has a slot, the end of the connecting rod has a connecting portion that cooperates with the slot, and the connecting portion is configured to cooperate with the slot.

3. The mold ejection device according to claim 2, wherein the wall forming the first slide groove and away from the static die head also has a first insertion hole, and the wall forming the third mounting hole has a plurality of evenly distributed step holes, and the plurality of first insertion holes correspond one-to-one to the plurality of step holes, and the first insertion holes are respectively connected to the first slide groove and the corresponding step holes, and the outer wall of the second matching plate also has a plurality of evenly distributed mounting grooves, and the plurality of mounting grooves correspond one-to-one to the plurality of step holes, and the bottom wall forming the mounting groove has a first oil hole, and the first oil hole is also connected to the step hole, wherein the end of the connecting rod away from the slider passes through the first insertion hole and the step hole in sequence and is placed in the first oil hole.

4. The mold ejection device according to claim 3, wherein the end of the connecting rod placed in the first oil hole has a plug, and the plug has two oppositely arranged annular protrusions, and a first rubber sleeve is sleeved between the two annular protrusions.

5. The mold ejection device according to claim 4, wherein a second rubber sleeve is further provided in the step hole, and the connecting rod passes through the first rubber sleeve, a cover plate is further fixed in the mounting groove, and the cover plate further has an insertion portion on the side facing the first oil hole, the insertion portion is inserted into the first oil hole, and a second rubber sleeve is further sleeved on the insertion portion.

6. The mold ejection device according to claim 5, wherein the wall forming the first oil hole further has a second oil hole, the second oil hole is located between the plug and the first rubber sleeve, and the wall forming the first oil hole further has a third oil hole, the third oil hole is close to the mounting groove and is located between the cover plate and the plug.

7. The mold ejection device according to claim 6, wherein a first annular groove and a second annular groove are further provided on a side facing the first mating plate, the first annular groove being located within the second annular groove and spaced a predetermined distance from the second annular groove, the plurality of second oil holes being connected to the first annular groove, and the plurality of third oil holes being connected to the second annular groove, and the bottom wall forming the first annular groove being provided with a fourth oil hole, and the bottom wall forming the second annular groove being provided with a fifth oil hole, and the other ends of the fifth oil hole and the fourth oil hole being located on the side wall of the bottom wall.

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