A core-drawing slide mechanism for an injection mold and an injection mold

Abstract

The application belongs to the technical field of injection mold and provides a core-pulling slider mechanism for an injection mold and the injection mold. The core-pulling slider mechanism comprises: a first slider comprising a first profiling surface and a first limiting surface arranged adjacently; a second slider comprising a second profiling surface and a second limiting surface arranged adjacently, the first profiling surface and the second profiling surface being used for forming a cavity surface of a molded product, and the first limiting surface and the second limiting surface being movable against each other; and a plurality of forming blocks movably arranged in the first slider, each of the forming blocks comprising a profiling convex part, and each of the forming blocks having a forming position and an ejection position on the first slider. Compared with the prior art, the application integrates movable forming blocks in the first slider, and automatically drives and positions the forming blocks by using the relative movement of the first slider and the second slider, so that the inner core-pulling action can be completed without additional configuration of a hydraulic cylinder, an air cylinder or an independent core-pulling mechanism.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of injection mold, and particularly relates to a core-pulling slider mechanism for an injection mold and the injection mold. BACKGROUND

[0002] In the injection molding process, for plastic products with side holes, side recesses or complex internal cavity structures, a slider core-pulling mechanism is usually used to achieve smooth mold demolding. Although the traditional inclined guide pillar core-pulling mechanism is simple in structure and widely used, it often has problems such as insufficient core-pulling distance, structural interference or difficult maintenance when facing multi-directional core-pulling, deep cavity core-pulling or space-limited occasions.

[0003] In recent years, with the increasing complexity of product structures, especially the increasing demand for precision plastic parts in the fields of automobiles and electronics, various composite core-pulling mechanisms based on slider linkage have emerged. Among them, the core-pulling structure of double sliders working together has attracted attention because it can automatically lock when the mold is closed and automatically core-pull when the mold is opened. However, the double slider mechanism in the prior art is mainly used for external core-pulling and cannot meet the molding needs of complex internal structures of products.

[0004] In addition, for plastic parts with internal bosses, reverse buckles or slender rib positions, conventional integral sliders cannot achieve complete demolding and require the introduction of movable internal core-pulling elements. Such internal core-pulling elements are usually driven by springs, hydraulic cylinders or independent ejection systems, which have the disadvantages of complex structure, low reliability and large space occupation. Especially in small-sized molds, how to integrate an internal core-pulling mechanism with automatic reset, reliable positioning and sufficient strength in a limited space has become a technical problem that needs to be solved by those skilled in the art.

[0005] For example Figure 1 A workpiece 600 used in an automobile is shown in FIG. 6, which has a reverse buckle structure 610 on the inner wall. When designing the core-pulling mechanism of the reverse buckle structure 610, the traditional injection mold is often designed to be more complex, which increases the volume of the injection mold, reduces the reliability of the injection mold, and requires a larger tonnage injection molding machine. SUMMARY

[0006] The present application solves the technical problems of the prior art and provides a core-pulling slider mechanism for an injection mold and the injection mold.

[0007] The technical solution adopted by the present application to solve the above technical problems is to provide a core-pulling slider mechanism for an injection mold, wherein the injection mold comprises a cavity block, and the core-pulling slider mechanism comprises:

[0008] a first slider movably arranged on the cavity block, the first slider comprising a first profiling surface and a first limiting surface arranged adjacent to each other;

[0009] a second slider movably arranged on the cavity block, the second slider comprising a second profiling surface and a second limiting surface arranged adjacently, the first profiling surface and the second profiling surface are both used to form a cavity surface of a molded product, and the first limiting surface and the second limiting surface are movably abutted to each other to provide a limit for the movement of the first slider and the second slider;

[0010] a plurality of molding blocks movably arranged in the first slider, each of the plurality of molding blocks comprising a profiling protrusion, and each of the plurality of molding blocks having a molding position and an ejection position on the first slider; wherein,

[0011] when in the molding position, the profiling protrusions of the plurality of molding blocks and the inner wall of the first slider combine to form a molding cavity, one end of the molding cavity penetrates the first profiling surface of the first slider, and the end of the molding block provided with the profiling protrusion is in abutment with the second limiting surface of the second slider, thereby fixing the molding block in the molding position;

[0012] when switching from the molding position to the ejection position, the molding block moves along a direction perpendicular to the movement direction of the first slider to allow the profiling protrusion of the molding block to exit the first slider, thereby separating the molded workpiece from the profiling protrusion.

[0013] In the core-pulling slider mechanism for an injection mold described above, the first slider is provided with a movement channel corresponding to each of the molding blocks, the movement channel is arranged obliquely to the movement direction of the first slider, the molding block is movably arranged in the movement channel, and the movement channel is provided with an elastic member, one end of the elastic member is in abutment with the molding block;

[0014] when the first slider and the second slider move relatively close to each other, the second slider pushes the molding block to move towards the molding position, causing the elastic member to compress and store energy;

[0015] when the first slider and the second slider move relatively far away from each other, the elastic member releases the elastic potential energy and pushes the molding block to move towards the ejection position.

[0016] In the core-pulling slider mechanism for an injection mold described above, further comprising a slider seat, the first slider is connected to the slider seat, the movement channel penetrates one end of the first slider towards the slider seat, the slider seat is provided with a guide column, the guide column extends into the molding block, and the elastic member is sleeved outside the guide column.

[0017] In the core-pulling slider mechanism for injection mold, the first slider is provided with a guide block, the forming block is provided with a guide groove, and one end of the guide block extends into the guide groove to guide the movement of the forming block.

[0018] In the core-pulling slider mechanism for injection mold, the cavity block is provided with a pushing block on the side facing the first slider, the first slider is provided with an avoiding groove with one end penetrating the first limiting surface, and one end of the pushing block extends into the avoiding groove and movably abuts against the forming block, so that the pushing block pushes the forming block to move relative to the first slider when the first slider moves relative to the cavity block.

[0019] In the core-pulling slider mechanism for injection mold, the outer side wall of the forming block extends towards the cavity block to form an abutting portion, and the abutting portion movably abuts against the pushing block.

[0020] In the core-pulling slider mechanism for injection mold, the first slider is provided with a profiling concave portion communicating with the moving channel, the profiling convex portion is inserted into the profiling concave portion when the forming block is in the forming position, and the profiling convex portion and the profiling concave portion jointly form the forming cavity, and the first slider is detachably provided with a connecting block, at least part of the side wall of the connecting block constitutes part of the structure of the forming cavity.

[0021] In the core-pulling slider mechanism for injection mold, the first slider is provided with a mounting groove, one end of the mounting groove communicates with the forming cavity, the other end penetrates the end surface of the first slider, the connecting block is arranged in the mounting groove, and an exhaust gap is arranged between the connecting block and the mounting groove.

[0022] In the core-pulling slider mechanism for injection mold, the second slider is provided with a wear-resistant block, the end surface of the wear-resistant block is flush with the second limiting surface, and the wear-resistant block movably abuts against the forming block.

[0023] The present application solves the above technical problems and further provides an injection mold comprising the core-pulling slider mechanism for injection mold.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] (1) By integrating the movable forming block in the first slider and utilizing the relative movement of the first slider and the second slider to automatically drive and position the forming block, the internal core-pulling action can be completed without additional configuration of hydraulic cylinders, air cylinders or independent core-pulling mechanisms.

[0026] (2) By setting the inclined arrangement of the moving channel in the first slider, and cooperating with the elastic element (such as spring), the automatic reset and ejection of the forming block is realized, so that in the mold closing process, the forming block is pushed into the forming position by the second slider and the elastic element is compressed to store energy; after the mold is opened, the elastic element releases energy to automatically drive the forming block to complete the core-pulling action.

[0027] (3) By adding the slider seat and guide column structure, not only a stable installation foundation is provided for the first slider, but also the guide column extends to the inside of the forming block and cooperates with the elastic element sleeve to realize effective guidance and limiting of the elastic element, preventing it from bending, deflection or instability during compression and release. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a perspective view of the workpiece.

[0029] Figure 2 is a perspective view of a core-pulling slider mechanism for an injection mold.

[0030] Figure 3 is Figure 2 is a perspective view of the workpiece after omitting the workpiece in the core-pulling slider mechanism.

[0031] Figure 4 is Figure 3 is a plan view of the core-pulling slider mechanism.

[0032] Figure 5 is Figure 4 is a sectional view of A-A in the core-pulling slider mechanism.

[0033] Figure 6 is a perspective view of the first slider.

[0034] Figure 7 is a perspective view of the second slider.

[0035] Figure 8 is a partial sectional view when the forming block is in the forming position on the first slider.

[0036] Figure 9 is a perspective view of the forming block.

[0037] In the figure, 100 is the first slider; 110 is the first profiling surface; 120 is the first limiting surface; 130 is the moving channel; 140 is the elastic element; 150 is the guide block; 160 is the avoidance slot; 170 is the profiling recess; 180 is the connecting block; 190 is the installation slot; 200 is the second slider; 210 is the second profiling surface; 220 is the second limiting surface; 230 is the wear-resistant block; 300 is the forming block; 310 is the profiling protrusion; 320 is the guide slot; 330 is the abutting portion; 400 is the slider seat; 410 is the guide column; 500 is the cavity block; 510 is the pushing block; 600 is the workpiece; and 610 is the reverse buckle structure. DETAILED DESCRIPTION

[0038] The technical solutions of the present application are further described below in combination with the drawings, but the present application is not limited to these embodiments.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0040] As shown in Figures 1 to 9 A core-pulling slider mechanism for an injection mold, the injection mold comprising a cavity block 500, the core-pulling slider mechanism comprising: a first slider 100, a second slider 200, and a plurality of forming blocks 300.

[0041] Specifically, the cavity block 500 is a component of the injection mold, mainly used to jointly enclose with the first slider 100, the second slider 200, and the plurality of forming blocks 300 to form a complete cavity for molding a workpiece 600.

[0042] In an embodiment, the cavity block 500 is further provided with a guide structure for providing guidance to the first slider 100 and the second slider 200 when they move relative to the cavity block 500, ensuring smooth movement and accurate positioning of the sliders.

[0043] The first slider 100 and the second slider 200 are both slidably arranged on the cavity block 500, and their movement is realized by an oil cylinder or other driving components on the injection mold.

[0044] The first slider 100 comprises a first profiling surface 110 and a first limiting surface 120 arranged adjacently, and the second slider 200 comprises a second profiling surface 210 and a second limiting surface 220 arranged adjacently.

[0045] During the injection molding process, the first profiling surface 110 and the second profiling surface 210 jointly form the cavity surface of the molded product, for forming the outer shape structure of the workpiece 600; and the first limiting surface 120 and the second limiting surface 220 abut against each other when the mold is closed, serving as limiting and locking functions to prevent the sliders from deviating during high-pressure injection molding, ensuring stable mold closing.

[0046] The number of the forming blocks 300 can be one, two or more, and the specific number is determined according to the number of the undercut structures 610 on the workpiece 600. Each forming block 300 is movably arranged inside the first slider 100, and is provided with a profiling convex part 310, which can be integrally formed with the forming block 300 or separately arranged and fixed by screwing or welding after the forming block 300 and the profiling convex part 310 are respectively machined. The forming block 300 has a forming position and an ejection position on the first slider 100.

[0047] In one embodiment, two undercut structures 610 are arranged on the workpiece 600. Since the two forming blocks 300 are synchronous, i.e., they are synchronously moved to the forming position (as shown in Figure 8 , inside the first slider 100) when the mold is closed, and are synchronously moved to the ejection position (not shown in the figure) after the mold is opened. For the convenience of describing the working principle of the forming block 300 in the present scheme, the following description takes a single forming block 300 as an example.

[0048] When the first slider 100 and the second slider 200 are moved close to each other under the action of the driving device such as an oil cylinder, the mold enters the closed state, the second slider 200 pushes the forming block 300 through the second limiting surface 220, so that the forming block 300 is moved to the forming position.

[0049] At this time, the profiling convex part 310 of the forming block 300 cooperates with the profiling concave part 170 inside the first slider 100 to form a forming cavity for forming the undercut structure 610 of the workpiece 600. One end of the forming cavity is connected with the first profiling surface 110 of the first slider 100, so that the undercut structure 610 is integrated with the main body of the workpiece 600. At the same time, under the continuous pressing of the second slider 200, the forming block 300 is stably fixed at the forming position, so that displacement does not occur during injection molding.

[0050] When the injection molding is completed and the mold starts to open, the oil cylinder drives the first slider 100 and the second slider 200 to move away from each other. With the second slider 200 moving out, the constraint on the forming block 300 is released, and the forming block 300 is moved from the forming position to the ejection position in a direction perpendicular to the moving direction of the first slider 100.

[0051] For example, referring to Figure 5 , the first slider 100 is moved in the direction from right to left, and the forming block 300 is moved relative to the first slider 100 in the direction from top to bottom. In this process, the profiling convex part 310 gradually exits the forming cavity, so that the undercut structure 610 of the workpiece 600 is separated from the profiling convex part 310, and the local core-pulling action is completed.

[0052] After the undercut structure 610 is completely out, the ejection mechanism (such as ejector plate, ejector rod, etc.) of the injection mold will eject the workpiece 600 as a whole from the mold, completing the entire demolding process.

[0053] The present scheme integrates a movable forming block 300 in the first slider 100, and uses the relative movement of the first slider 100 and the second slider 200 to automatically drive and position the forming block 300, without the need for additional configuration of hydraulic cylinders, air cylinders or independent core-pulling mechanisms to complete the internal core-pulling action.

[0054] Compared with the traditional scheme relying on inclined ejection, hydraulic core-pulling or complex linkage mechanism, the present structure is more compact and reliable in action, and is particularly suitable for the molding of precision plastic parts (such as automobile kick plates) with complex structures such as internal undercut, boss or slender rib.

[0055] At the same time, through the mutual abutment of the first limiting surface 120 and the second limiting surface 220, the automatic locking of the double sliders during clamping is realized, which improves the overall rigidity and stability of the mold, and effectively avoids the defects of flash and overflow caused by insufficient locking force.

[0056] It is worth mentioning that the first slider 100 is provided with a moving channel 130 corresponding to the forming block 300, the moving channel 130 can be machined by machining, the moving direction of the moving channel 130 and the first slider 100 is inclined, the forming block 300 is movably arranged in the moving channel 130, and the moving channel 130 is provided with an elastic element 140, one end of the elastic element 140 abuts against the forming block 300, and the elastic element 140 is preferably a spring.

[0057] When the first slider 100 and the second slider 200 move relatively close (i.e. the clamping process), the second slider 200 pushes the forming block 300 to move to the molding position, so that the elastic element 140 is compressed to store elastic potential energy (refer to Figure 5 ); when the first slider 100 and the second slider 200 move relatively far away (i.e. the opening process), the elastic element 140 releases the stored elastic potential energy and pushes the forming block 300 to move to the ejection position.

[0058] Since the moving channel 130 is inclined relative to the moving direction of the first slider 100, under the driving of the elastic element 140, the forming block 300 slides along the moving channel 130, and its movement direction is decomposed into horizontal and vertical components, and finally realizes that the profiling convex part 310 on the forming block 300 is separated from the undercut structure 610 on the workpiece 600 from the top to the bottom direction, thereby completing the core-pulling demolding operation of the undercut structure 610. Figure 5

[0059] ​In the present scheme, by setting the inclined arranged moving channel 130 in the first slider 100, and cooperating with the elastic member 140 (such as spring), the automatic reset and ejection of the forming block 300 is realized, so that in the mold closing process, the forming block 300 is pushed into the forming position by the second slider 200 and the elastic member 140 is compressed to store energy; after the mold is opened, the elastic member 140 releases energy to automatically drive the forming block 300 to complete the core pulling action.

[0060] The design fully utilizes the mechanical movement of mold opening and closing as a driving source, without additional configuration of hydraulic cylinder, air cylinder or other external power system, effectively simplifies the mold structure, improves the automation degree and operation reliability, and is especially suitable for small-sized mold application with limited space.

[0061] In order to facilitate the installation and fixation of the elastic member 140, the present scheme further includes a slider seat 400, the first slider 100 is connected to the slider seat 400, the moving channel 130 penetrates the first slider 100 towards one end of the slider seat 400, the slider seat 400 is provided with a guide column 410, the guide column 410 extends into the forming block 300, and the elastic member 140 is sleeved outside the guide column 410.

[0062] The connection between the slider seat 400 and the first slider 100 can be realized by threaded connection. The end of the moving channel 130 penetrating the first slider 100 towards the slider seat 400 facilitates the preloading of the elastic member 140 and the forming block 300 in the moving channel 130 before the first slider 100 is installed to the slider seat 400.

[0063] The guide column 410 is used to provide guidance to the elastic member 140 when it is compressed and stored, ensuring that it is compressed and rebounded along the predetermined axis, preventing deflection or instability, thereby effectively ensuring the service life of the elastic member 140.

[0064] The connection between the guide column 410 and the slider seat 400 can be threaded connection, specifically, a threaded hole can be provided on the slider seat 400, an external thread matched with the threaded hole is provided on one end of the guide column 410, and the guide column 410 is screwed in for fixation; of course, a bolt through hole can also be provided on the slider seat 400, an internal thread hole is provided on the guide column 410, and the guide column 410 is fixedly connected by screwing the bolt through the bolt through hole and into the threaded hole of the guide column 410.

[0065] The present scheme adds the slider seat 400 and the guide column 410 structure, not only provides a stable installation basis for the first slider 100, but also extends the guide column 410 into the forming block 300 and cooperates with the elastic member 140 to realize effective guidance and limiting of the elastic member 140, preventing bending, deflection or instability during compression and release.

[0066] The structure significantly improves the stability and positioning accuracy of the forming block 300, prolongs the service life of the elastic member 140, and enhances the durability and reliability of the entire core pulling mechanism.

[0067] In order to enable the forming block 300 to move along a predetermined path in the first slider 100, the first slider 100 is provided with a guide block 150, and the forming block 300 is provided with a guide groove 320. One end of the guide block 150 extends into the guide groove 320 to provide guidance for the movement of the forming block 300.

[0068] The elastic member 140 made of a spring may deform or fatigue after long-term work, causing the pushing force of the elastic member 140 to deviate from the predetermined direction when releasing the elastic potential energy, which may cause the forming block 300 to be stuck in the movement channel 130 in extreme cases.

[0069] The present scheme forms an accurate guide structure by providing a guide block 150 on the first slider 100 and a guide groove 320 cooperating therewith on the forming block 300, effectively limiting the movement trajectory of the forming block 300 during movement, preventing deviation or jamming.

[0070] The guide structure not only ensures smooth movement of the forming block 300 in the predetermined direction, avoiding lateral stress and movement interference, but also significantly improves the reliability of the synchronous action of multiple forming blocks 300. Especially in the case of multiple core pulling in parallel, it ensures consistent action of each core pulling unit, improves the stability of product forming and consistency of quality.

[0071] In order to further ensure that the forming block 300 will not be stuck in the movement channel 130, in the present scheme, the cavity block 500 is provided with a pushing block 510 on the side facing the first slider 100, and the first slider 100 is provided with an avoidance groove 160 penetrating through the first limiting surface 120, one end of the pushing block 510 extending into the avoidance groove 160 and being in movable abutment with the forming block 300, for pushing the forming block 300 to move relative to the first slider 100 when the first slider 100 moves relative to the cavity block 500.

[0072] During the opening of the injection mold, the first slider 100 moves relative to the cavity block 500, driving the avoidance groove 160 on it to slide along the pushing block 510 fixed on the cavity block 500. With the relative movement of the two, the distance between the pushing block 510 and the forming block 300 in the first slider 100 gradually decreases; when the pushing block 510 contacts the forming block 300, the first slider 100 continues to move, pushing the forming block 300 to move relative to the first slider 100 from the forming position to the ejection position.

[0073] The structure can ensure that the forming block 300 reliably completes the core-pulling action and smoothly demolds from the workpiece 600 in the case of failure of the elastic member 140 or insufficient pre-tightening force.

[0074] The scheme drives and controls the position of the forming block 300 by using the relative movement during mold opening, through setting the pushing block 510 on the cavity block 500 and setting the position-avoiding groove 160 matched with the pushing block 510 in the first sliding block 100. The design improves the controllability of the action of the forming block 300 and ensures that the forming block 300 can be separated from the first sliding block 100 during mold opening.

[0075] Further, the outer side wall of the forming block 300 extends to the cavity block 500 to form an abutting portion 330, and the abutting portion 330 movably abuts against the pushing block 510.

[0076] The abutting portion 330 can be integrally formed with the forming block 300 or fixed by welding or threaded connection.

[0077] In the scheme, the abutting portion 330 extending to the cavity block 500 is arranged on the outer side wall of the forming block 300, which increases the contact area of the forming block 300 and the pushing block 510, and makes the transmission of the pushing force more uniform and reliable. The structure effectively reduces the risk of local stress concentration and prevents the forming block 300 from deforming or breaking during frequent reciprocating motion, thereby improving the structural strength and long-term reliability of the mechanism.

[0078] It is worth mentioning that the first sliding block 100 is provided with a profiling concave portion 170 communicating with the moving channel 130, the profiling convex portion 310 is inserted into the profiling concave portion 170 when the forming block 300 is in a forming position, and the first sliding block 100 is detachably provided with a connecting block 180, at least part of the side wall of the connecting block 180 constitutes part of the structure of the forming cavity.

[0079] When the inverted buckle structure 610 on the workpiece 600 contains small or complex features, directly processing corresponding structures on the inner wall of the forming cavity will significantly increase the processing difficulty and manufacturing cost of the injection mold.

[0080] To solve this problem, the connecting block 180 is detachably arranged on the first sliding block 100, and part of the profile of the inverted buckle structure 610 is processed on the connecting block 180, thereby reducing the overall processing complexity of the forming cavity.

[0081] The detachable connection between the connecting block 180 and the first sliding block 100 can be achieved by inlaying or threaded connection.

[0082] The profiling concave portion 170 is arranged in the first sliding block 100, and the profiling convex portion 310 of the forming block 300 cooperates to form a complete forming cavity, which helps to improve the forming precision and surface quality of the inner cavity.

[0083] The detachable design of the connecting block 180 not only facilitates local repair or replacement of vulnerable parts, but also supports rapid mold changing to adapt to different product models, significantly improving the flexibility, maintenance convenience and economy of the mold.

[0084] Further, the first slider 100 is provided with a mounting groove 190, one end of which is communicated with the forming cavity, and the other end penetrates the end face of the first slider 100, and the connecting block 180 is arranged in the mounting groove 190, and an exhaust gap is arranged between the connecting block 180 and the mounting groove 190.

[0085] The forming cavity is used for forming the undercut structure 610 on the workpiece 600. Since the workpiece 600 has a relatively thin wall thickness, when the forming block 300 is in the clamped position, the effective width of the forming cavity is small. If the forming cavity is designed as a closed structure, it is difficult to exhaust the gas in the cavity during injection molding, and trapped gas is easily formed, which leads to defects such as material shortage and burning.

[0086] To solve this problem, the mounting groove 190 is arranged on the first slider 100, one end of which is communicated with the forming cavity, and the other end penetrates the end face of the first slider 100, and the connecting block 180 is detachably arranged in the mounting groove 190. An exhaust gap is arranged between the connecting block 180 and the mounting groove 190, which can effectively exhaust the air and volatile gas in the forming cavity during injection molding, avoid air resistance defects, and thus ensure the filling integrity and the quality of the workpiece 600.

[0087] Preferably, the second slider 200 is provided with a wear-resistant block 230, the end face of which is flush with the second limiting surface 220 and movably abuts against the forming block 300.

[0088] The wear-resistant block 230 is arranged on the second slider 200, and the end face thereof is flush with the second limiting surface 220 and movably abuts against the forming block 300, which can significantly reduce the wear caused by high-frequency relative motion and prolong the service life of the key contact surface. The wear-resistant block 230 is made of high-hardness material (such as alloy steel or surface-treated part), and can be replaced separately, which reduces the overall maintenance cost and improves the economy and sustainable use ability of the mold.

[0089] In this scheme, an injection mold is also provided, which comprises the core-pulling slider mechanism described above.

[0090] In summary, the core-pulling slider mechanism for injection mold provided by the scheme has the advantages of compact structure, reliable action, and convenient maintenance.

[0091] The mechanism realizes automatic core pulling and resetting of the complex inner reverse buckle structure 610 by integrating the movable forming block 300 in the first slider 100, combining double slider linkage, inclined movement channel 130, elastic resetting element and guide structure. Through the design of the pushing block 510, the abutting portion 330, the connecting block 180 and the exhaust gap, the movement reliability, processing economy and forming quality are further improved.

[0092] In addition, the whole mechanism does not need additional hydraulic or pneumatic drive, fully utilizes the mechanical movement of mold opening and closing to realize automatic control, effectively solves the problems of complex structure, large space occupation, easy jamming and difficult maintenance of traditional core pulling mechanism, and is especially suitable for efficient and stable production of plastic parts (such as automobile kick plate) with thin wall, complex structure and high precision, and has good practical value and wide application prospect.

[0093] It should be noted that the description such as "first", "second", "one" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. The terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0094] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0095] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A core-drawing slide mechanism for an injection mold, the injection mold comprising a cavity block, characterized in that, The core-pulling slide mechanism comprises: a first slide movably arranged on the cavity block, the first slide comprising a first profiling surface and a first limiting surface arranged adjacently; a second slide movably arranged on the cavity block, the second slide comprising a second profiling surface and a second limiting surface arranged adjacently, the first profiling surface and the second profiling surface both being used to form a cavity surface of a molded product, the first limiting surface and the second limiting surface being movable against each other to provide a limit for the movement of the first slide and the second slide; a plurality of molding blocks movably arranged in the first slide, each of the plurality of molding blocks comprising a profiling protrusion, each of the plurality of molding blocks having a molding position and an ejection position on the first slide; wherein, when in the molding position, the profiling protrusions of the plurality of molding blocks and the inner wall of the first slide combine to form a molding cavity, one end of the molding cavity penetrating through the first profiling surface of the first slide, one end of the profiling protrusion of the molding block being in abutment with the second limiting surface of the second slide, thereby fixing the molding block in the molding position; when switching from the molding position to the ejection position, the molding block moves in a direction perpendicular to the movement direction of the first slide to allow the profiling protrusion of the molding block to exit the first slide, thereby separating the molded workpiece from the profiling protrusion; when the mold starts to open after the injection is completed, the oil cylinder drives the first slide and the second slide to move away from each other; as the second slide exits, the constraint on the molding block is released, and the molding block moves from the molding position to the ejection position in a direction perpendicular to the movement direction of the first slide; the first slide is provided with a movement channel corresponding to each of the molding blocks, the movement channel being arranged obliquely relative to the movement direction of the first slide, the molding block being movably arranged in the movement channel, and the movement channel being provided with an elastic member, one end of the elastic member being in abutment with the molding block; when the first slide and the second slide move relatively close to each other, the second slide pushes the molding block to move towards the molding position, causing the elastic member to compress and store energy; when the first slide and the second slide move relatively away from each other, the elastic member releases the elastic potential energy and pushes the molding block to move towards the ejection position.

2. A core-drawing slide mechanism for an injection mold as defined in claim 1, wherein, a slide seat is further included, the first slide being connected to the slide seat, the movement channel penetrating through one end of the first slide towards the slide seat, the slide seat being provided with a guide column, the guide column extending into the molding block, and the elastic member being sleeved outside the guide column.

3. A core-drawing slide mechanism for an injection mold as defined in claim 2, wherein, the first slide is provided with a guide block, the molding block being provided with a guide groove, one end of the guide block extending into the guide groove to provide a guide for the movement of the molding block.

4. A core-drawing slide mechanism for an injection mold as defined in claim 1, wherein, The side of the cavity block facing the first slider is provided with a push block, and the first slider is provided with an avoidance slot penetrating through the first limiting surface at one end. One end of the push block extends into the avoidance slot and movably abuts against the forming block, so as to push the forming block to move relative to the first slider when the first slider moves relative to the cavity block.

5. A core-drawing slide mechanism for an injection mold as defined in claim 4, wherein, The outer side wall of the forming block extends to the cavity block to form an abutting part, and the abutting part movably abuts against the push block.

6. A core-drawing slide mechanism for an injection mold as defined in claim 1, wherein, The first slider is provided with a profiling concave part in communication with the moving channel. When the forming block is in the forming position, the profiling convex part is inserted into the profiling concave part to jointly form the forming cavity. The first slider is detachably provided with a connecting block, and at least a part of the side wall of the connecting block constitutes part of the structure of the forming cavity.

7. A core-drawing slide mechanism for an injection mold as defined in claim 6, wherein, The first slider is provided with a mounting slot, one end of the mounting slot is in communication with the forming cavity, and the other end penetrates through the end surface of the first slider. The connecting block is arranged in the mounting slot, and an exhaust gap is arranged between the connecting block and the mounting slot.

8. A core-drawing slide mechanism for an injection mold as defined in claim 1, wherein, The second slider is provided with a wear-resistant block, and the end surface of the wear-resistant block is flush with the second limiting surface and movably abuts against the forming block.

9. An injection mold characterized in that, The core-pulling slider mechanism for the injection mold comprises any one of the injection molds according to claims 1 to 8.

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