Core-pulling injection mold for plastic cover

Abstract

The utility model relates to the technical field of plastic injection molding, and in particular relates to a plastic cover core-pulling injection mold which comprises a frame body, a core pulling mechanism and a core pulling mechanism, the male template is arranged on the frame body and is provided with a first model; the female mold plate is arranged on the frame body in a sliding mode, is connected with the first moving mechanism and is provided with a second mold, the first mold and the second mold are used for forming a mold core cavity when the male mold plate and the female mold plate are attached, an injection molding opening is formed in the male mold plate and / or the female mold plate, and the injection molding opening communicates with the mold core cavity; the first mold is provided with a first opening extending in the first direction, and the first core pulling mechanism is used for blocking the first opening; and the second mold is provided with a second opening extending in the second direction, the second core pulling mechanism is used for blocking the second opening, and the first direction and the second direction are arranged in an intersecting mode. The utility model discloses a core-pulling injection mold for a plastic cover, and aims to solve the problem that bubbles exist in injection molding liquid in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic injection molding, and more specifically to a core-pulling injection mold for a plastic cover. Background Art

[0002] The core pulling device of the injection mold is a type of injection mold. Because some workpieces have irregular shapes or structures and are inconvenient to eject, core pulling molds are used for processing.

[0003] Injection molds usually form core pieces of fixed shape by injecting injection liquid into the core cavity. The core pulling mechanism in the prior art is usually an ejection mechanism set on one side of the mold for ejecting the core piece, which is a mechanism for saving labor and automatically separating the core piece from the mold.

[0004] However, in actual use, the injection liquid is often unevenly distributed and bubbles exist in the injection liquid. On the one hand, it affects the structural strength of the core part, and on the other hand, it directly affects the appearance of the core part, directly reducing the quality of the core part. Utility Model Content

[0005] The main purpose of the utility model is to provide a core-pulling injection mold for a plastic cover, aiming to solve the problems of uneven step-by-step injection of liquid and the presence of bubbles in the prior art.

[0006] In order to solve the above technical problems, a core-pulling injection mold for a plastic cover is proposed, comprising: a frame body provided with a first moving mechanism;

[0007] A male mold plate, arranged on the frame, is provided with a first mold;

[0008] A female template is slidably arranged on the frame and connected to the first moving mechanism, and is provided with a second model, wherein the first model and the second model are used to form a core cavity when the male template and the female template are attached, and an injection port is provided on the male template and / or the female template, and the injection port is communicated with the core cavity;

[0009] The first core-pulling mechanism, the first model is provided with a first opening extending along a first direction,

[0010] The first core-pulling mechanism is used to block the first opening;

[0011] A second core-pulling mechanism, the second model is provided with a second opening extending along a second direction, the second core-pulling mechanism is used to block the second opening, and the first direction and the second direction are arranged to intersect.

[0012] In any of the above technical solutions, further, the length of the first opening along the first direction is greater than or equal to the length of the first model along the first direction;

[0013] The length of the second opening along the second direction is less than or equal to the length of the second pattern along the second direction;

[0014] And / or, the first direction and the second direction are arranged perpendicular to each other, and the first opening is arranged in the middle of the first model along the second direction, and the second opening is arranged in the middle of the second model along the first direction.

[0015] In any of the above technical solutions, further, the second core-pulling mechanism includes:

[0016] A first mold bar, slidably disposed in the second opening;

[0017] a second moving mechanism, disposed corresponding to the second opening, and used to provide a force for the first mold bar to move closer to the first mold;

[0018] The limiting component is arranged on the mother template and connected with the first mold strip.

[0019] In any of the above technical solutions, further, the second core-pulling mechanism also includes:

[0020] A pressure detection mechanism, disposed between the first mold bar and the second moving mechanism;

[0021] A controller is electrically connected to the pressure detection mechanism and the second moving mechanism respectively, and is used to control the magnitude of the force output by the second moving mechanism according to feedback from the pressure detection mechanism.

[0022] In any of the above technical solutions, further, the pressure detection mechanism includes:

[0023] a pressure sensor, electrically connected to the controller and arranged corresponding to the second moving mechanism;

[0024] A linear bearing, fixed to the mother template;

[0025] A connecting member is slidably disposed on the linear bearing, fixedly connected to the pressure sensor, and disposed corresponding to the first mold bar for abutting against the first mold bar.

[0026] In any of the above technical solutions, further, the second moving mechanism and the pressure detection mechanism are set to two in a one-to-one correspondence.

[0027] In any of the above technical solutions, further, the first mold bar is provided with a guide rod portion and a convex ring portion, and the convex ring portion is provided at an end of the guide rod portion away from the first mold bar body;

[0028] The limiting component comprises:

[0029] A support member, arranged on the mother template, and provided with a through hole for the guide rod to pass through;

[0030] The spring is sleeved on the guide rod portion, and two ends of the spring are respectively in contact with the support member and the convex ring portion.

[0031] In any of the above technical solutions, further, the first core pulling mechanism includes:

[0032] A second mold bar, slidably disposed in the first opening;

[0033] The third moving mechanism is arranged corresponding to the first opening, and is used to provide a force for the second mold bar to move closer to the second mold.

[0034] In any of the above technical solutions, further, the male template and / or the female template is provided with a pressure relief port, and the pressure relief port is communicated with the core cavity.

[0035] The beneficial effects are:

[0036] 1. The core-pulling injection mold for a plastic cover of the utility model supports the male mold plate and the female mold plate through a frame, and is equipped with a first moving mechanism to drive the female mold plate, so that when the male mold plate and the female mold plate are attached, a core cavity for processing a mold core piece can be formed, and the male mold plate and the female mold plate are separated so that the mold core piece in the core cavity can be taken out for mold injection;

[0037] 2. A first core pulling mechanism and a second core pulling mechanism are provided at the same time, which correspond to the first opening and the second opening on the male template and the female template respectively, so that a relatively excessive amount of injection liquid required for injection molding can be stored at the first opening and the second opening, and the injection liquid stored at the first opening and the second opening is squeezed into the core cavity by the provision of the first core pulling mechanism and the second core pulling mechanism, so as to increase the density of the injection liquid in the core cavity and make the injection liquid more evenly distributed, so as to reduce the content of bubbles in the injection liquid or remove the bubbles in the injection liquid;

[0038] 3. In addition, the core piece in the core cavity can be ejected from both sides by means of the first core pulling mechanism and / or the second core pulling mechanism, thereby enhancing the usefulness of the first core pulling mechanism and the second core pulling mechanism;

[0039] 4. The first opening and the second opening are extended in the first direction and the second direction respectively, so as to guide the injection liquid in the core cavity in the first direction and the second direction, thereby making the liquid in the core cavity more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a three-dimensional structural schematic diagram of a core-pulling injection mold for a plastic cover of the utility model;

[0042] Figure 2 It is a front cross-sectional structural schematic diagram of a core-pulling injection mold for a plastic cover of the utility model;

[0043] Figure 3 It is a top cross-sectional structural schematic diagram of a core-pulling injection mold for a plastic cover of the utility model;

[0044] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0045] The following are the descriptions of the reference numerals:

[0046] 1. frame; 101. first moving mechanism;

[0047] 2. Male mold plate; 201. First mold; 202. First opening; 203. Injection port; 204. Pressure relief port;

[0048] 3. Mother template; 301. Second model; 302. Second opening;

[0049] 4. First core pulling mechanism; 401. Second mold strip; 402. Third moving mechanism;

[0050] 5. Second core-pulling mechanism; 501. First mold strip; 502. Second moving mechanism; 503. Limiting assembly; 504. Pressure detection mechanism; 505. Pressure sensor; 506. Linear bearing; 507. Connecting piece; 508. Guide rod; 509. Convex ring; 510. Support piece; 511. Spring;

[0051] 6. Mold core parts. DETAILED DESCRIPTION

[0052] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0053] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0054] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0057] The utility model proposes a core-pulling injection mold for a plastic cover, wherein a core piece in a core cavity is ejected by a first core-pulling mechanism and a second core-pulling mechanism, and injection liquid at a first opening and a second opening are squeezed respectively by means of the first core-pulling mechanism and the second core-pulling mechanism, so as to improve the compactness of the injection liquid in the core cavity, reduce the presence of bubbles, and improve the injection quality.

[0058] A core-pulling injection mold for a plastic cover of the present application is described in detail through the following embodiments.

[0059] In this embodiment, if Figures 1 to 4 As shown, the core-pulling injection mold for the plastic cover comprises: a frame 1, provided with a first moving mechanism 101;

[0060] The male mold plate 2 is disposed on the frame 1 and is provided with a first mold 201;

[0061] The female template 3 is slidably disposed on the frame 1 and connected to the first moving mechanism 101, and is provided with a second model 301. The first model 201 and the second model 301 are used to form a core cavity when the male template 2 and the female template 3 are attached. The male template 2 and / or the female template 3 are provided with an injection port 203, and the injection port 203 is communicated with the core cavity;

[0062] A first core-pulling mechanism 4, wherein the first model 201 is provided with a first opening 202 extending along a first direction, and the first core-pulling mechanism 4 is used to block the first opening 202;

[0063] The second core-pulling mechanism 5, the second model 301 is provided with a second opening 302 extending along the second direction, the second core-pulling mechanism 5 is used to block the second opening 302, and the first direction and the second direction are arranged to intersect.

[0064] In the present technical solution, the frame 1 is horizontally arranged, the male template 2 and the female template 3 are arranged on the frame 1 along the left and right directions, the frame 1 is provided with a bottom support seat and four guide rods, and the male template 2 and the female template 3 are each provided with four guide holes corresponding to the four guide rods respectively. The male template 2 is fixed on the left side of the frame 1, and the female template 3 is slidable left and right on the right side of the frame 1.

[0065] The first model 201 on the male template 2 is a concave mold set on the right side of the male template 2, and the second model 301 of the female template 3 is a convex mold set on the left side of the female template 3. For the sake of distinction, the part on the right side of the left side of the female template 3 is called the body of the female template 3. When the male template 2 and the female template 3 are fitted, the right side of the male template 2 abuts against the left side of the body of the female template 3. At this time, the second model 301 is in the concave surface of the first model 201, and there is a certain distance between the concave surface of the first model 201 and the convex surface of the second model 301. The space between the concave surface of the first model 201 and the convex surface of the second model 301 is the core cavity. The male template 2 is provided with an injection port 203 for injection molding, which is specifically arranged on the upper side of the male template 2.

[0066] A first opening 202 is provided on the concave surface of the first model 201 and penetrates the male mold plate 2 in the left-right direction. The first opening 202 is strip-shaped and extends in the up-down direction. The first core-pulling mechanism 4 is arranged on the left side of the male mold plate 2, and the right side end of the first core-pulling mechanism 4 extends to the first opening 202.

[0067] A second opening 302 is provided on the convex surface of the second model 301 and passes through the mother template 3 in the left and right directions. The second opening 302 is strip-shaped and extends in the front-to-back direction. The second core-pulling mechanism 5 is arranged on the right side of the mother template 3, and the left side end of the second core-pulling mechanism 5 extends to the second opening 302.

[0068] The first moving mechanism 101 is a motor-driven screw slider moving mechanism, the slider is fixed on the upper side of the mother template 3, and the left and right position of the mother template 3 is controlled by controlling the forward and reverse rotation of the motor of the first moving mechanism 101.

[0069] In this embodiment, the length of the first opening 202 along the first direction is greater than or equal to the length of the first pattern 201 along the first direction;

[0070] The length of the second opening 302 along the second direction is less than or equal to the length of the second pattern 301 along the second direction;

[0071] And / or, the first direction and the second direction are arranged perpendicular to each other, and the first opening 202 is arranged in the middle of the first model 201 along the second direction, and the second opening 302 is arranged in the middle of the second model 301 along the first direction.

[0072] In the present technical solution, the length of the first opening 202 along the first direction is set to be greater than or equal to the length of the first model 201 along the first direction, so that the first core-pulling mechanism 4 can block the first model 201 with a concave structure. Specifically, when the second mold strip 401 of the first core-pulling mechanism 4 moves to the right, it will abut against the main body of the mother mold plate 2, limiting the distance the second mold strip 401 moves to the right. The length of the second opening 302 along the second direction is set to be less than or equal to the length of the second model along the second direction, so that the second core-pulling mechanism 5 can block the second model 301 with a convex structure. Specifically, when the first mold strip 501 of the second core-pulling mechanism 5 moves to the left, there is a possibility that it moves into the core cavity. Combined with the limit assembly 503 of the second core-pulling mechanism 5 and the subsequent pressure detection mechanism 504, it is convenient to accurately control the position of the first mold strip 501, and at the same time, the first mold strip 501 can be extended into the core cavity to squeeze the injection liquid to better remove bubbles.

[0073] Specifically, the maximum length of the first model 201 in the vertical direction is located in the middle of the front-to-back direction, the first opening 202 is located in the middle position, and the length of the first opening 202 in the vertical direction is greater than the maximum length of the first model 201 in the vertical direction. When the first core-pulling mechanism 4 acts to the right, it abuts against the left side of the main body of the mother template 3.

[0074] The maximum length of the second model 301 in the vertical and front-to-back directions is in the middle of the vertical direction, the second opening 302 is located in the middle position, and the length of the second opening 302 in the front-to-back direction is equal to the maximum length of the second model 301 in the front-to-back direction.

[0075] In this embodiment, the second core-pulling mechanism 5 includes:

[0076] A first molding strip 501 is slidably disposed in the second opening 302;

[0077] The second moving mechanism 502 is disposed corresponding to the second opening 302 and is used to provide a force for the first mold bar 501 to move closer to the first mold 201;

[0078] The limiting assembly 503 is disposed on the mother mold plate 3 and connected to the first mold strip 501 .

[0079] In the technical solution, when the first mold strip 501 is flush with the second opening 302, the left side of the first mold strip 501 and the second mold 301 form a smooth convex surface. At this time, moving the first mold strip 501 to the right can increase the space of the core cavity, and the spacing between the core cavity and the second opening 302 will increase. At this time, when the liquid is injected through the injection port 203, more injection liquid can be stored in the core cavity. In this position state, the first mold strip 501 is moved to the left to be flush with the second opening 302, which can squeeze the injection liquid in the core cavity, squeeze out bubbles, and increase the compactness of the injection liquid. Alternatively, the first mold strip 501 is moved to the left side of the second opening 302, so that the first mold strip 501 squeezes the injection liquid first, and then the first mold strip 501 is moved to the right to be flush with the second opening 302.

[0080] The second moving mechanism 502 is a cylinder arranged in the left and right directions, and is non-fixedly connected to the first mold bar 501, that is, the second moving mechanism 502 can provide a force for the first mold bar 501 to move leftward, but cannot drive the first mold bar 501 to move rightward when the second moving mechanism 502 contracts.

[0081] The limiting assembly 503 is disposed on the first mold strip 501 and the mother mold plate 3 , and can limit the extent to which the first mold strip 501 moves to the left.

[0082] The limiting component 503 is provided to provide limiting capability for the first mold bar 501 , and to control the extent to which the first mold bar 501 can move to the left.

[0083] In this embodiment, the second core-pulling mechanism 5 further includes:

[0084] The pressure detection mechanism 504 is disposed between the first mold bar 501 and the second moving mechanism 502;

[0085] The controller (not shown) is electrically connected to the pressure detection mechanism 504 and the second moving mechanism 502 , respectively, and is used to control the magnitude of the force output by the second moving mechanism 502 according to the feedback of the pressure detection mechanism 504 .

[0086] In the present technical solution, the pressure detection mechanism 504 is arranged between the first mold strip 501 and the second movable mechanism 502, that is, the force output to the left by the second movable mechanism 502 is indirectly transmitted to the first mold strip 501 through the pressure detection mechanism 504. In this way, combined with the controller (not shown in the figure), the pressure output to the left by the second movable mechanism 502 can be controlled.

[0087] Specifically, since the space in the core cavity is fixed when the second mold strip 401 of the first core pulling mechanism 4 is aligned with the first opening 202 and the first mold strip 501 of the second core pulling mechanism 5 is aligned with the second opening 302, the injection liquid into the core cavity through the injection port 203 is controllable, so it is possible to know the pressure of the liquid in the injection cavity on the first mold strip 501 to the right when a fixed amount of injection liquid is injected and the first mold strip 501 is kept flush with the second opening 302. The pressure detection mechanism 504, the controller and the second moving mechanism 502 provide the first mold strip 501 with a force of the same magnitude, so that the first mold strip 501 can be kept flush with the second opening 302.

[0088] The air intake valve of the second moving mechanism 502 is provided with an electrical proportional valve, which can accurately control the distance that the telescopic shaft of the second moving mechanism 502 extends to the left, and further accurately control the magnitude of the force output to the left by the second moving mechanism 502 .

[0089] It is worth noting that, in actual setting, since the conditions for achieving complete flushing are harsh, the magnitude of the force applied to the first mold strip 501 to the left by the second moving mechanism 502 can be controlled within a certain range.

[0090] In some technical solutions, injection molding is allowed when the first mold strip 501 is not flush with the second opening 302 , and / or injection molding is allowed when the second mold strip 401 is not flush with the first opening 202 .

[0091] In this embodiment, the pressure detection mechanism 504 includes:

[0092] A pressure sensor 505 is electrically connected to the controller and is disposed corresponding to the second moving mechanism 502;

[0093] Linear bearing 506, fixed to the mother template 3;

[0094] The connecting member 507 is slidably disposed on the linear bearing 506 , fixedly connected to the pressure sensor 505 , and is disposed corresponding to the first mold bar 501 for abutting against the first mold bar 501 .

[0095] In this technical solution, the linear bearing 506 is horizontally arranged in the left and right directions, the connecting member 507 is a structural member which is generally cylindrical and has a dome on the left side, the pressure sensor 505 is fixed on the right side of the connecting member 507, the left end of the connecting member 507 is used to abut against the first mold strip 501, and the second moving mechanism 502 is arranged on the right side of the pressure sensor 505.

[0096] The controller is electrically connected to the pressure sensor 505, the second moving mechanism 502, and the air intake valve of the second moving mechanism 502. When in use, the air intake valve of the second moving mechanism 502 is controlled by the controller according to the force detected by the pressure sensor 505, so that the force output to the left by the second moving mechanism 502 is within the required range.

[0097] In this embodiment, two second moving mechanisms 502 and two pressure detection mechanisms 504 are provided in a one-to-one correspondence.

[0098] In the present technical solution, two second moving mechanisms 502 and pressure detection mechanisms 504 are symmetrically arranged front and back. Specifically, such arrangement can provide a stable force on the first mold bar 501 on the one hand, and can detect the force output by the two second moving mechanisms 502 through the two pressure detection mechanisms 504 on the other hand, so that the force at two locations on the first mold bar 501 is kept within the required range, so as to ensure the alignment of the first mold bar 501 and the second opening 302, and accurately control the relative position of the first mold bar 501.

[0099] In this embodiment, the first mold bar 501 is provided with a guide rod portion 508 and a convex ring portion 509. The convex ring portion 509 is provided at one end of the guide rod portion 508 away from the main body of the first mold bar 501.

[0100] The limiting assembly 503 includes:

[0101] The support member 510 is disposed on the mother template 3 and is provided with a through hole for the guide rod 508 to pass through;

[0102] The spring 511 is sleeved on the guide rod portion 508 , and its two ends are respectively in contact with the support member 510 and the convex ring portion 509 .

[0103] In the present technical solution, the first mold bar 501 body refers to a curved piece whose left side is flush with the second opening 302. There are two guide rods 508, which are cylindrical structures respectively fixed on the right side of the front and rear ends of the first mold bar 501 and extend to the right; there are two convex rings 509, which are respectively fixed on the right ends of the two guide rods 508 at the front and rear ends.

[0104] The support member 510 is a sheet-like structure corresponding to the second opening 302 and detachably arranged on the right side of the main body of the mother template 3. The support member 510 is provided with a through hole for the guide rod 508 to pass through. Two support members 510 are symmetrically arranged front and back, and the spring 511 is sleeved on the guide rod 508.

[0105] The position of the first mold strip 501 is limited by such a soft limit assembly 503. On the one hand, it is convenient to move the first mold strip 501 to the left and pass over the left end of the second mold 301 to further squeeze the injection liquid in the core cavity; on the other hand, the first mold strip 501 can be automatically moved to the right under the action of the spring 511, so that the first mold strip 501 is flush with the second opening 302.

[0106] In this embodiment, the first core-pulling mechanism 4 includes:

[0107] The second molding strip 401 is slidably disposed in the first opening 202;

[0108] The third moving mechanism 402 is disposed corresponding to the first opening 202 and is used to provide a force for the second mold bar 401 to move closer to the second mold 301 .

[0109] In the present technical solution, the second mold strip 401 is a bent piece. When the second mold strip 401 is flush with the first opening 202 , the second mold strip 401 and the left side surface of the first mold 201 form a smooth concave surface.

[0110] The third moving mechanism 402 is a cylinder, which is fixed to the left side of the male mold plate 2 along the left-right direction and is fixedly connected to the second mold bar 401 , and can drive the second mold bar 401 to move left-right.

[0111] In this embodiment, the male mold plate 2 and / or the female mold plate 3 is provided with a pressure relief port 204, and the pressure relief port 204 is communicated with the core cavity.

[0112] In this technical solution, the pressure relief port 204 is arranged on the lower side of the main body of the mother mold plate 3, corresponding to the lower side end of the second mold strip 401, and the injection liquid in the core cavity can move to the outside of the core cavity through the pressure relief port 204.

[0113] In actual use, a pressure valve is provided at the pressure relief port 204 to ensure that the pressure in the core cavity is within a suitable range.

[0114] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A core-pulling injection mold for a plastic cover, characterized in that: include: The frame (1) is provided with a first moving mechanism (101); A male mold plate (2) is arranged on the frame (1) and is provided with a first mold (201); A female template (3) is slidably arranged on the frame (1) and connected to the first moving mechanism (101), and is provided with a second model (301), wherein the first model (201) and the second model (301) are used to form a core cavity when the male template (2) and the female template (3) are fitted together, and an injection port (203) is provided on the male template (2) and / or the female template (3), and the injection port (203) is communicated with the core cavity; A first core-pulling mechanism (4), wherein the first model (201) is provided with a first opening (202) extending along a first direction, and the first core-pulling mechanism (4) is used to block the first opening (202); A second core-pulling mechanism (5), wherein the second model (301) is provided with a second opening (302) extending along a second direction, and the second core-pulling mechanism (5) is used to block the second opening (302), and the first direction and the second direction are arranged to intersect.

2. The core-pulling injection mold for a plastic cover according to claim 1, characterized in that: The length of the first opening (202) along the first direction is greater than or equal to the length of the first pattern (201) along the first direction; The length of the second opening (302) along the second direction is less than or equal to the length of the second pattern (301) along the second direction; And / or, the first direction and the second direction are arranged perpendicular to each other, and the first opening (202) is arranged in the middle of the first model (201) along the second direction, and the second opening (302) is arranged in the middle of the second model (301) along the first direction.

3. The core-pulling injection mold for a plastic cover according to claim 1 or 2, characterized in that: The second core-pulling mechanism (5) comprises: A first mold strip (501) is slidably disposed in the second opening (302); a second moving mechanism (502), arranged corresponding to the second opening (302), and used for providing a force for the first mold strip (501) to move closer to the first mold (201); A limiting component (503) is arranged on the mother mold plate (3) and is connected to the first mold strip (501).

4. The core-pulling injection mold for a plastic cover according to claim 3, characterized in that: The second core-pulling mechanism (5) further comprises: A pressure detection mechanism (504) is arranged between the first mold bar (501) and the second moving mechanism (502); A controller is electrically connected to the pressure detection mechanism (504) and the second moving mechanism (502) respectively, and is used to control the magnitude of the force output by the second moving mechanism (502) according to feedback from the pressure detection mechanism (504).

5. The core-pulling injection mold for a plastic cover according to claim 4, characterized in that: The pressure detection mechanism (504) comprises: a pressure sensor (505), electrically connected to the controller and arranged corresponding to the second moving mechanism (502); A linear bearing (506) fixed to the mother template (3); A connecting member (507) is slidably disposed on the linear bearing (506), fixedly connected to the pressure sensor (505), and disposed corresponding to the first mold bar (501) for abutting against the first mold bar (501).

6. The core-pulling injection mold for a plastic cover according to claim 4, characterized in that: The number of the second moving mechanism (502) and the number of the pressure detecting mechanism (504) are set in a one-to-one correspondence.

7. The core-pulling injection mold for a plastic cover according to claim 3, characterized in that: The first mold bar (501) is provided with a guide rod portion (508) and a convex ring portion (509), and the convex ring portion (509) is arranged at an end of the guide rod portion (508) away from the main body of the first mold bar (501); The limiting component (503) comprises: A support member (510) is arranged on the mother template (3) and is provided with a through hole for the guide rod portion (508) to pass through; The spring (511) is sleeved on the guide rod portion (508), and two ends thereof are respectively in contact with the support member (510) and the convex ring portion (509).

8. The core-pulling injection mold for a plastic cover according to claim 3, characterized in that: The first core-pulling mechanism (4) comprises: A second mold strip (401) is slidably disposed in the first opening (202); The third moving mechanism (402) is arranged corresponding to the first opening (202) and is used to provide a force for the second mold bar (401) to move closer to the second mold (301).

9. The core-pulling injection mold for a plastic cover according to claim 3, characterized in that: The male mold plate (2) and / or the female mold plate (3) is provided with a pressure relief port (204), and the pressure relief port (204) is communicated with the core cavity.

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