Core pulling components and molds

Abstract

The present invention discloses a core pulling assembly and a mold with the core pulling assembly, wherein the core pulling assembly includes a first slider, a second slider, a guide structure, a connecting piece, a power piece, a stopper and an elastic element, wherein the second slider is provided with a connecting through hole, and the guide structure is respectively connected to the first slider and the second slider; the connecting piece is passed through the connecting through hole, one end is connected to the first slider, and the other end is provided with a limiter; the power piece is connected to the first slider, and drives the first slider and the second slider to move along the guide structure; the stopper is provided on one side of the first slider, and the connecting line between the stopper and the first slider is perpendicular to the moving direction of the first slider; the elastic element abuts against the stopper; wherein the first slider is provided with a recess for accommodating part of the stopper and a guide surface for guiding the stopper to enter the recess. By providing the stopper, during injection molding, the abutment between the stopper and the second slider provides a supporting force for the second slider, thereby preventing the second slider from retreating.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a core pulling component and a mold. Background Art

[0002] When the side wall of a plastic product has a through hole, groove or boss, the plastic product cannot be directly removed from the mold. The molded parts of the through hole, groove and boss must be made movable. The movable molded parts are called movable cores. The mechanism that completes the extraction and reset of the movable core is called a core pulling mechanism. In the related art, the core pulling mechanism is driven by a hydraulic cylinder, and the hydraulic cylinder is connected to the movable core for core pulling through a slider. During mold injection, the slider has the phenomenon of retreat. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a core pulling assembly that can prevent a slider from retreating.

[0004] The present invention also provides a mold having the core pulling assembly.

[0005] According to the first aspect of the present invention, the core pulling assembly comprises a first slider, a second slider, a guide structure, a connecting piece, a power piece, a stopper and an elastic element, wherein the second slider is provided with a connecting through hole, and the guiding structure is connected to the first slider and the second slider respectively; the connecting piece is passed through the connecting through hole, one end of which is connected to the first slider, and the other end of which is provided with a limiting portion, the diameter of the limiting portion is greater than the diameter of the connecting through hole, and the distance between the limiting portion and the first slider is greater than the length of the connecting through hole; the power piece is connected to the first slider, and drives the first slider and the second slider to move along the guiding structure; The stopper is arranged on one side of the first slider, and the line connecting the stopper and the first slider is perpendicular to the moving direction of the first slider; the elastic element is arranged on the side of the stopper away from the first slider and abuts against the stopper; wherein the first slider is provided with a recess for accommodating part of the stopper and a guide surface for guiding the stopper into the recess, and the stopper has a first state and a second state, in the first state, the stopper is located in the recess and abuts against the end face of the second slider close to the first slider; in the second state, the stopper is disengaged from the recess and abuts against the side face of the second slider.

[0006] The core pulling assembly according to the embodiment of the present invention has at least the following beneficial effects: by providing a stopper, during injection molding, the stopper abuts against the second slider to provide a supporting force for the second slider, thereby preventing the second slider from retreating.

[0007] According to some embodiments of the present invention, a boss is provided on the side of the second sliding block, and the stopper is correspondingly provided with a groove, and the boss can abut against the bottom surface of the groove so that the stopper presses the elastic element.

[0008] According to some embodiments of the present invention, the second slider includes a sliding member and an insert, the sliding member is connected to the guide structure and is provided with a mounting groove, the insert is installed in the mounting groove, in the first state, the stop block abuts against the end face of the insert; in the second state, the stop block abuts against the side face of the insert.

[0009] According to some embodiments of the present invention, one end of the sliding member facing the first sliding block protrudes from the insert, and the first sliding block pushes the second sliding block by abutting against the sliding member.

[0010] According to some embodiments of the present invention, the connecting member includes a travel screw, a threaded portion of the travel screw is connected to the first sliding block, and a head portion of the travel screw is the limiting portion.

[0011] According to some embodiments of the present invention, the guide structure includes a slide groove, and the stopper is located at an opening side of the slide groove.

[0012] According to some embodiments of the present invention, the elastic element includes a spring, and the stopper is provided with a mounting hole for accommodating the spring.

[0013] According to some embodiments of the present invention, the core pulling assembly includes a fixed seat, the power component includes a hydraulic cylinder, the piston rod of the hydraulic cylinder is connected to the first slider, the hydraulic cylinder is fixed to the fixed seat, and an adjustment gasket is provided between the fixed seat and the first slider.

[0014] According to some embodiments of the present invention, the core pulling assembly further includes a lever mechanism, wherein the lever mechanism includes a lever, one end of the lever is rotatably connected to the second slider, and the other end of the lever is used to press the movable core.

[0015] The mold according to the second embodiment of the present invention includes the core pulling assembly according to the first embodiment of the present invention.

[0016] The mold according to the embodiment of the present invention has at least the following beneficial effects: since the core pulling assembly of the first aspect of the present invention is adopted, by setting a stop block, during injection molding, the stop block abuts against the second slider to provide support force for the second slider, thereby preventing the second slider from retreating.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 is a schematic diagram of a mold according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of a core pulling assembly is shown;

[0021] Figure 3 for Figure 2 A schematic diagram of a first slider shown in FIG.

[0022] Figure 4 for Figure 2 A schematic diagram of the stopper shown in FIG.

[0023] Figure 5 for Figure 2 An exploded view of the second slider shown in FIG.

[0024] Figure 6 and Figure 7 for Figure 2 Schematic diagram of two different states of the core pulling assembly during the mold closing process;

[0025] Figure 8 and Fig. 9 for Figure 2 Schematic diagram of two different states of the core pulling assembly during the core pulling process.

[0026] Reference numerals:

[0027] 101, forming assembly; 102, power member; 103, first slider; 104, second slider; 105, connecting member; 106, stopper; 107, elastic element; 108, limiting part; 109, lever; 110, support; 111, pin;

[0028] 201, guide plate; 202, fixed seat; 203, connecting sleeve; 204, opening; 205, adjusting gasket; 206, movable core;

[0029] 301, recess; 302, guide surface; 303, T-slot; 304, abutment surface;

[0030] 401, sliding portion; 402, plane portion; 403, supporting portion; 404, groove;

[0031] 501, U-shaped portion; 502, sliding member; 503, insert; 504, mounting groove; 505, boss. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which 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.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Refer to the following Figures 1 to 9 , describing a core pulling assembly according to an embodiment of the present invention and a mold having the core pulling assembly.

[0037] Reference Figure 1 As shown, it can be understood that the mold of the embodiment of the present invention includes a molding component 101 and a core pulling component, wherein the molding component 101 includes an upper mold and a lower mold, and the core pulling component is arranged on the molding component 101.

[0038] Reference Figure 2As shown, it can be understood that the core pulling assembly of the embodiment of the present invention includes a power piece 102, a first slider 103, a second slider 104, a guide structure, a connector 105, a stopper 106 and an elastic element 107. Among them, the power piece 102 is connected to the first slider 103, the first slider 103 is connected to the guide structure, the power piece 102 drives the first slider 103 to move along the guide structure, and the guide structure provides guidance for the first slider 103, so that the first slider 103 moves more smoothly and is not prone to deviation. The second slider 104 is used to drive the movable core 206 (not shown in the figure) to move, so as to realize the extraction and reset of the movable core 206, and the second slider 104 is connected to the guide structure. In the process of the power piece 102 driving the first slider 103 to move toward the second slider 104, the first slider 103 abuts against the second slider 104, so that the power piece 102 pushes the second slider 104 to move along the guide structure through the first slider 103.

[0039] It is understandable that the power member 102 can be a hydraulic cylinder, the hydraulic transmission is stable, and a larger pulling force and a longer core pulling distance can be obtained, and the core pulling action is not affected by the mold opening time and the ejection time. It is understandable that the power member 102 can also be a cylinder, a motor, etc.

[0040] During the injection molding process, the injection material will generate a large expansion force. At this time, the second slider 104 needs to resist the expansion force so that the injection material can form a specified shape under the limitation of the mold. In the existing mold, the slider is directly connected to the hydraulic cylinder, and the expansion force generated by injection molding is resisted by the liquid pressure in the hydraulic cylinder. However, the compressibility of the liquid is strong. During the resistance process, the piston rod will inevitably retreat due to the compression of the liquid inside the hydraulic cylinder, which will cause flash and step difference on the edge of the molded product, seriously affecting the quality of the product.

[0041] In order to solve the above problems, the core pulling assembly provided by the present invention divides the original slider into two parts, namely, the first slider 103 and the second slider 104, and adds a stopper 106 and an elastic element 107. The stopper 106 is located on one side of the first slider 103 and the second slider 104, and the elastic element 107 is located on the side of the stopper 106 away from the first slider 103 and the second slider 104. The two ends of the elastic element 107 abut the stopper 106 and the molding assembly 101 respectively. The molding assembly 101 is provided with an active cavity (not shown in the figure) for accommodating the sliding of the stopper 106, and the elastic element 107 is located in the active cavity, and at least part of the stopper 106 is also located in the active cavity. The stopper 106 is perpendicular to the two side surfaces of the moving direction of the first slider 103, and abuts against the inner wall of the active cavity, so that the molding assembly 101 can provide support for the stopper 106.

[0042] Reference Figure 3As shown, it can be understood that the first slider 103 is provided with a recess 301 for accommodating part of the stopper 106, and the first slider 103 is also provided with a guide surface 302 for guiding the stopper 106 to enter the recess 301, and the guide surface 302 is provided at one end of the first slider 103 close to the second slider 104. After the stopper 106 enters the recess 301, it can abut against the end surface of the second slider 104 close to the first slider 103, that is, it blocks the second slider 104 from moving toward the first slider 103, and provides a supporting force for the second slider 104 to prevent the second slider 104 from retreating due to the injection pressure. It can be understood that the guide surface 302 can be an inclined surface or a curved surface.

[0043] Reference Figure 4 As shown, it can be understood that, in order to cooperate with the guide surface 302 of the first slider 103, the stopper 106 is provided with a wedge-shaped sliding portion 401. By cooperating with the sliding portion 401 of the stopper 106 and the guide surface 302 of the first slider 103, the relative movement of the stopper 106 and the first slider 103 can be smoother, and it is more convenient for the stopper 106 to enter or escape from the recess 301 of the first slider 103.

[0044] Specifically, when the mold is closed, the power member 102 drives the first slider 103 to move toward the second slider 104, the first slider 103 reaches the second slider 104, and abuts against the second slider 104, and the power member 102 continues to push the first slider 103 and the second slider 104 to move along the guide structure. In the process of the first slider 103 and the second slider 104 moving together, the side of the second slider 104 contacts the stopper 106, that is, the second slider 104 presses the stopper 106 toward the active cavity of the molding assembly 101, so that the stopper 106 does not block the movement of the second slider 104, and at this time, the elastic element 107 is in a tight compression state. When the second slider 104 reaches the mold closing position, the side of the second slider 104 is separated from the stopper 106. The stopper 106 begins to slide out of the active cavity of the molding component 101 under the action of the elastic element 107, and gradually enters the recess 301 along the guide surface 302 of the first slider 103. After the stopper 106 enters the recess 301, the stopper 106 abuts against the end surface of the second slider 104 close to the first slider 103, blocking the second slider 104 from moving toward the first slider 103. The expansion force generated by injection molding acts on the second slider 104, so that the second slider 104 has a tendency to retreat, that is, when the second slider 104 has a tendency to move toward the first slider 103, in addition to the first slider 103 providing support for the second slider 104, the stopper 106 also provides support for the second slider 104, thereby increasing the support of the second slider 104, effectively preventing the second slider 104 from retreating, reducing defects such as flash and step difference caused by the retreat of the slider, and improving the quality of the product.

[0045] Reference Figure 1and Figure 2 As shown, it can be understood that the connecting member 105 is arranged between the first slider 103 and the second slider 104, and the first slider 103 drives the second slider 104 to move through the connecting member 105 to realize the extraction of the movable core 206. Specifically, the second slider 104 is provided with a connecting through hole (not shown in the figure), the connecting member 105 is penetrated through the connecting through hole, one end of the connecting member 105 is connected to the first slider 103, and the other end of the connecting member 105 is provided with a limiting portion 108, the diameter of the limiting portion 108 is greater than the diameter of the connecting through hole, and the distance between the limiting portion 108 and the first slider 103 is greater than the length of the connecting through hole.

[0046] When the mold is closed, the power member 102 drives the first slider 103 to move toward the second slider 104, the first slider 103 abuts against the second slider 104, and there is a certain gap between the limiting portion 108 of the connecting member 105 and the second slider 104. When the mold is cored out, the power member 102 drives the first slider 103 to move in a direction away from the second slider 104. At the beginning, the second slider 104 is subjected to the force of the stopper 106 and remains stationary, while the connecting member 105 follows the first slider 103 to move in a direction away from the second slider 104, and the gap between the limiting portion 108 of the connecting member 105 and the second slider 104 is also continuously reduced. In addition, due to the force of the guide surface 302 of the first slider 103, the stopper 106 gradually separates from the concave portion 301 of the first slider 103 and slides into the active cavity of the molding component 101. When the stopper 106 is disengaged from the end surface of the second slider 104 close to the first slider 103, that is, the stopper 106 no longer blocks the second slider 104 from moving toward the first slider 103, and the limiting portion 108 of the connecting member 105 abuts against the second slider 104, the first slider 103 can drag the second slider 104 toward the power member 102 through the connecting member 105, thereby realizing core pulling.

[0047] It is understandable that the connecting member 105 includes a travel screw, the teeth of the travel screw are connected to the first slider 103, and the head of the travel screw is the limiter 108. By adjusting the travel screw, the distance between the first slider 103 and the second slider 104 can be adjusted, and then the movement stroke of the second slider 104 can be adjusted to adapt to different products and improve adaptability.

[0048] It is understandable that the elastic element 107 includes a spring. A spring is a mechanical part that uses elasticity to work. A part made of elastic material deforms under the action of an external force and returns to its original shape after the external force is removed. The spring can provide the block 106 with power to reset, thereby achieving automatic reset. There is no need to set up other hydraulic cylinders for driving, which saves energy and cost and helps to reduce the occupied space. The elastic element 107 can also include other elements made of elastic materials and having reset capabilities.

[0049] Reference Figure 2 As shown, it can be understood that the guide structure includes a slide groove, and the slide groove includes two guide plates 201, and the guide plates 201 are provided with guide steps, and the two guide plates 201 are arranged opposite to each other to form a groove structure. The first slider 103 and the second slider 104 are also provided with step structures correspondingly, and the step structures cooperate with the guide steps to ensure that the first slider 103 and the second slider 104 slide along a predetermined direction. It should be noted that the guide structure can also be a guide column, and the first slider 103 and the second slider 104 are provided with guide holes correspondingly, and the guide holes cooperate with the guide columns to ensure that the first slider 103 and the second slider 104 slide along a predetermined direction.

[0050] Reference Figure 2 As shown, it can be understood that the stopper 106 is located at the opening 204 side of the slide slot, and the stopper 106 moves along a direction perpendicular to the opening 204 of the slide slot to lock the second slider 104 or release the second slider 104 .

[0051] Reference Figure 2 As shown, it can be understood that the core pulling assembly includes a fixed seat 202, the power member 102 includes a hydraulic cylinder and a connecting sleeve 203, the hydraulic cylinder is fixed to the fixed seat 202, and the fixed seat 202 is fixed to the forming assembly 101. The hydraulic cylinder is located at one end of the fixed seat 202, and the first slider 103 is located at the other end of the fixed seat 202. The fixed seat 202 has an opening 204, and the opening 204 is for the piston rod of the hydraulic cylinder to pass through. The piston rod of the hydraulic cylinder is connected to the first slider 103 through the connecting sleeve 203, and an adjustment gasket 205 is provided between the fixed seat 202 and the first slider 103. By setting an adjustment gasket 205 between the fixed seat 202 and the first slider 103, the distance between the fixed seat 202 and the first slider 103 can be adjusted. The hydraulic cylinder is fixed on the fixed seat 202, and the length of the piston rod of the hydraulic cylinder is also certain. That is, by setting the adjustment gasket 205, the moving distance of the first slider 103 on the guide mechanism is adjusted, and then the moving distance of the second slider 104 on the guide mechanism is adjusted, thereby realizing the adjustment of the core pulling distance.

[0052] In addition, it can be understood that the adjustment gasket 205 is configured as a wear-resistant part. Since the adjustment gasket 205 is in contact with the fixed seat 202 and the first slider 103, during the process of the core pulling assembly pulling out and resetting the movable core 206, the adjustment gasket 205 is repeatedly in contact with the fixed seat 202 and the first slider 103 and wears out. The adjustment gasket 205 is configured as a wear-resistant part, which can increase the service life of the adjustment gasket 205. In addition, since the adjustment gasket 205 is independently provided from the fixed seat 202 and the first slider 103, it is easy to replace without replacing the entire fixed seat 202 or the first slider 103, saving costs.

[0053] Reference Figure 1 and Figure 2 As shown, it can be understood that the core pulling assembly also includes a lever mechanism, which includes a lever 109, one end of which is rotatably connected to the second slider 104, and the other end is used to press the movable core 206. By setting the lever mechanism, the force direction can be converted, the length of the mechanism in one direction can be reduced, the space occupied by the core pulling assembly can be reduced, and the space of the mold can be effectively utilized. At the same time, the length of the lever arm at both ends of the lever 109 can also be adjusted according to actual needs to adjust the torque and stroke to meet the needs of different products.

[0054] Reference Figure 2 As shown, it can be understood that the lever mechanism also includes a support 110, the support 110 is fixedly mounted on the molding assembly 101, and the middle part of the lever 109 is rotatably connected to the support 110. Specifically, one end of the lever 109 is connected to the second slider 104 through a pin 111, and the middle part of the lever 109 is connected to the support 110 through the pin 111. The lever 109 is provided with a connection hole for the pin 111 to pass through. Figure 5 As shown, the second slider 104 and the support 110 are provided with a U-shaped portion 501 for accommodating the lever 109 , and the pin 111 is passed through two free ends of the U-shaped portion 501 .

[0055] Reference Figure 3 As shown, it can be understood that a T-slot 303 is provided at one end of the first slider 103 facing the hydraulic cylinder, and the connecting sleeve 203 is engaged with the T-slot 303 of the first slider 103, thereby realizing the connection between the hydraulic cylinder and the first slider 103. This makes it more convenient to install and disassemble the hydraulic cylinder and the first slider 103, thereby reducing the processing difficulty of the core pulling assembly and the mold, and making the core pulling assembly and the mold easy to maintain.

[0056] Reference Figure 4 As shown, it can be understood that the stopper 106 is provided with a wedge-shaped sliding portion 401, and a plane portion 402 is connected next to the sliding portion 401. The end of the stopper 106 close to the second slider 104 is provided with a support portion 403 protruding from the plane portion 402, and the support portion 403 and the sliding portion 401 are respectively provided at both ends of the plane portion 402. Figure 3 As shown, it can be understood that the first slider 103 is provided with a guide surface 302 for sliding with the sliding portion 401, and the first slider 103 is also provided with an abutment surface 304 located beside the guide surface 302. Figure 7 As shown, it can be understood that the abutting surface 304 is used to abut against the plane portion 402 of the stopper 106 to increase the contact area between the first slider 103 and the stopper 106, and the force can be more stable through the plane abutment. Figure 7As shown, it can be understood that the support portion 403 enters the gap between the first slider 103 and the second slider 104 , and the support portion 403 abuts against the end surface of the second slider 104 close to the first slider 103 .

[0057] Reference Figure 5 As shown, it can be understood that the second slider 104 includes a sliding member 502 and an insert 503 , the sliding member 502 is connected to the guide structure, and the sliding member 502 is provided with a mounting groove 504 , the insert 503 is installed in the mounting groove 504 , and the insert 503 is used to abut against the second slider 104 .

[0058] When the mold is closed, the power member 102 pushes the first slider 103 and the second slider 104 to move along the guide structure. During the movement of the first slider 103 and the second slider 104, the side of the insert 503 contacts the stopper 106, that is, the side of the insert 503 facing away from the sliding member 502 contacts the stopper 106, and the insert 503 presses the stopper 106 toward the active cavity of the molding assembly 101, so that the stopper 106 does not block the movement of the second slider 104. When the second slider 104 reaches the mold closing position, the side of the insert 503 disengages from the stopper 106. Under the action of the elastic element 107, the stopper 106 begins to slide out of the active cavity of the molding component 101 and gradually enters the recess 301 along the guide surface 302 of the first slider 103. After the stopper 106 enters the recess 301, the stopper 106 abuts against the end surface of the insert 503 close to the first slider 103, thereby preventing the second slider 104 from moving toward the first slider 103.

[0059] When the mold core is pulled, the power member 102 drives the first slider 103 to move away from the second slider 104. Due to the force of the guide surface 302 of the first slider 103, the stopper 106 gradually separates from the concave portion 301 of the first slider 103 and slides into the active cavity of the molding component 101. When the stopper 106 separates from the end surface of the insert 503 close to the first slider 103, the second slider 104 starts to move toward the first slider 103. At this time, the side of the insert 503 away from the sliding member 502 contacts the stopper 106, so that the stopper 106 remains in the active cavity of the molding component 101.

[0060] Reference Figure 5 As shown, it can be understood that a boss 505 is provided on the side of the insert 503 away from the sliding member 502, referring to Figure 4As shown, the stopper 106 is correspondingly provided with a groove 404, the groove 404 penetrates the support portion 403 and the sliding portion 401, and the boss 505 can abut against the bottom surface of the groove 404, so that the stopper 106 presses the elastic element 107. That is, the insert 503 abuts against the stopper 106 through the boss 505 located on the side, so that the first slider 103 and the second slider 104 can be kept on the same axis, and the first slider 103 does not need to eccentrically avoid, thereby reducing the occupied space and ensuring high force transmission efficiency.

[0061] It can be understood that by providing the insert 503, the insert 503 can be quenched, making the insert 503 more wear-resistant and also easier to replace and adjust.

[0062] Reference Figures 6 to 9 As shown, it can be understood that the end of the sliding member 502 facing the first slider 103 protrudes from the insert 503, and the first slider 103 pushes the second slider 104 by abutting against the sliding member 502. The sliding member 502 and the end of the insert 503 facing the first slider 103 form a step-like structure, which can effectively avoid the stopper 106, so that the movement between the stopper 106 and the second slider 104 is smoother.

[0063] When connecting the core pulling assembly, the piston rod of the hydraulic cylinder is passed through the opening 204 of the fixed seat 202, and the connecting sleeve 203 is installed on the piston rod. After the installation is completed, the connecting sleeve 203 is engaged with the T-slot 303 of the first slider 103. After the engagement is completed, the first slider 103 and the second slider 104 are connected with the travel screw, and then the first slider 103 and the second slider 104 are placed in the slide groove. The stopper 106 and the spring are placed in the active cavity of the molding assembly 101. After the stopper 106 compresses the spring, the first slider 103 and the second slider 104 cooperate with the stopper 106, and then the fixed seat 202 and the slide groove are fixed on the molding assembly 101, and the lever mechanism is connected to the second slider 104 to complete the connection of the core pulling assembly.

[0064] Refer to the following Figures 6 to 9 , describing the working process of the core pulling assembly of an embodiment of the present invention.

[0065] Reference Figure 6 As shown, it can be understood that the core pulling assembly is in the initial stage of the mold closing process, the first slider 103 is abutted against the second slider 104, the limiting portion 108 of the connecting member 105 is higher than the connecting through hole of the second slider 104, the side of the second slider 104 is abutted against the stopper 106, and the elastic element 107 is in a compressed state, and the lever 109 is pulled by the second slider 104, and there is a space between the other end of the lever 109 and the movable core 206, and the space is used for the movable core 206 to be pulled out (the movable core 206 is driven to rotate by gears and detached from the cavity).

[0066] Reference Figure 7 As shown, it can be understood that the core pulling assembly is in the final stage of the mold closing process, the first slider 103 is abutted against the second slider 104, the limiting portion 108 of the connecting member 105 is higher than the connecting through hole of the second slider 104, the stopper 106 enters the recess 301 of the first slider 103, and the stopper 106 is abutted against the end surface of the second slider 104 close to the first slider 103, the elastic element 107 is in an extended state, and the lever 109 is pushed by the second slider 104, and the other end of the lever 109 is crimped on the movable core 206 to prevent the movable core 206 from escaping from the cavity.

[0067] Reference Figure 8 As shown, it can be understood that the core pulling assembly is in the initial stage of the core pulling process, there is a movable space between the first slider 103 and the second slider 104, the limiting portion 108 of the connecting piece 105 is crimped on the end face of the connecting through hole of the second slider 104, the stopper 106 begins to push out of the recess 301 of the first slider 103, and the stopper 106 also begins to separate from the end face of the second slider 104 close to the first slider 103, the elastic element 107 is in a compressed state, and the lever 109 is still crimped on the movable core 206.

[0068] Reference Fig. 9 As shown, it can be understood that the core pulling assembly is in the final stage of the core pulling process, there is a movable space between the first slider 103 and the second slider 104, the limiting portion 108 of the connecting piece 105 is crimped on the end face of the connecting through hole of the second slider 104, the first slider 103 is disengaged from the stopper 106 and there is no contact, the side of the second slider 104 abuts against the stopper 106, the elastic element 107 is in a compressed state, and the lever 109 is pulled by the second slider 104, and there is a space between the other end of the lever 109 and the movable core 206, and the space is used for the movable core 206 to be pulled out.

[0069] The mold of the embodiment of the present invention includes the core pulling assembly of the embodiment of the present invention. Since the mold of the embodiment of the present invention adopts the core pulling assembly of the present invention, by setting the stopper 106, during injection molding, the stopper 106 abuts against the second slider 104 to provide support force for the second slider 104, thereby preventing the second slider 104 from retreating.

[0070] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The core pulling assembly is characterized in that: include: First slider; The second slider is provided with a connecting through hole; A guide structure, connected to the first slider and the second slider respectively; A connecting member is inserted into the connecting through hole, one end of which is connected to the first slider, and the other end of which is provided with a limiting portion, wherein the diameter of the limiting portion is greater than the diameter of the connecting through hole, and the distance between the limiting portion and the first slider is greater than the length of the connecting through hole; A power member connected to the first slider and driving the first slider and the second slider to move along the guide structure; A stopper, disposed on one side of the first slider, wherein a line connecting the stopper and the first slider is perpendicular to a moving direction of the first slider; an elastic element, arranged on a side of the stopper away from the first sliding block and abutting against the stopper; Wherein, the first slider is provided with a recess for accommodating part of the stopper and a guide surface for guiding the stopper into the recess, the stopper has a first state and a second state, in the first state, the stopper is located in the recess and abuts against the end surface of the second slider close to the first slider; in the second state, the stopper is disengaged from the recess and abuts against the side surface of the second slider; the core pulling assembly also includes a lever mechanism, the lever mechanism includes a lever and a support, one end of the lever is rotatably connected to the second slider, and the other end is used to press the movable core, the middle part of the lever is rotatably connected to the support, and the distance from one end of the lever connected to the second slider to the middle part is greater than the distance from the other end to the middle part.

2. The core pulling assembly according to claim 1, characterized in that: A boss is provided on the side of the second sliding block, and a groove is correspondingly provided on the stopper. The boss can abut against the bottom surface of the groove so that the stopper presses the elastic element.

3. The core pulling assembly according to claim 1, characterized in that: The second slider includes a sliding member and an insert. The sliding member is connected to the guide structure and is provided with a mounting groove. The insert is installed in the mounting groove. In the first state, the stopper abuts against the end face of the insert; in the second state, the stopper abuts against the side face of the insert.

4. The core pulling assembly according to claim 3, characterized in that: One end of the sliding member facing the first sliding block protrudes from the insert, and the first sliding block pushes the second sliding block by abutting against the sliding member.

5. The core pulling assembly according to claim 1, characterized in that: The connecting member includes a travel screw, a thread portion of the travel screw is connected to the first sliding block, and a head portion of the travel screw is the limiting portion.

6. The core pulling assembly according to claim 1, characterized in that: The guide structure comprises a slide groove, and the stopper is located at an opening side of the slide groove.

7. The core pulling assembly according to claim 1, characterized in that: The elastic element comprises a spring, and the stopper is provided with a mounting hole for accommodating the spring.

8. The core pulling assembly according to claim 1, characterized in that: The core pulling assembly includes a fixed seat, the power component includes a hydraulic cylinder, the piston rod of the hydraulic cylinder is connected to the first slider, the hydraulic cylinder is fixed to the fixed seat, and an adjustment gasket is provided between the fixed seat and the first slider.

9. A mold, characterized in that A core pulling assembly comprising any one of claims 1 to 8.

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