Die capable of automatically shearing stub bar

Abstract

The utility model relates to the technical field of injection molds, in particular to a mold capable of automatically shearing stub bars, which is used for producing injection molding parts and comprises a fixed mold, a movable mold, a mold core component and a driving component. The movable mold is provided with a first position abutting against the fixed mold and sealing the injection molding cavity and a second position separated from the fixed mold; the mold core assembly comprises a fixed mold core and a rotary mold core, the fixed mold core is fixedly arranged in the injection molding cavity, a rotary hole is formed in the fixed mold core, the rotary mold core penetrates through the rotary hole and is in running fit with the fixed mold core, the other end, located in the injection molding cavity, of the rotary mold core is used for being fixedly connected with an injection molding part in the injection molding cavity, and an injection molding channel is formed in the fixed mold core; the injection molding channel communicates with the injection molding cavity; the driving assembly can drive the rotary mold core to rotate. According to the device, the function of automatically shearing the material head is achieved, the labor intensity of workers is relieved, the labor cost is reduced, and the production efficiency of injection molding parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold for automatically shearing the sprue Background Art

[0002] At present, knob products in the market are usually made by injection molding process. After the workpiece is formed by injection molding, there will be a sprue formed during the injection molding process remaining on the workpiece. The removal of the sprue on the workpiece is generally carried out by manually holding a tool to cut it. In this way, not only does it have the disadvantages of high labor intensity of the staff and high labor cost, but also the disadvantage of low production efficiency of the workpiece. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a mold for automatically shearing the sprue, so as to solve the problems in the related technology that removing the sprue on the knob manually not only has the disadvantages of high labor intensity of the staff and high labor cost, but also has the problem of low production efficiency of the workpiece.

[0004] The utility model provides a mold for automatically shearing the sprue, which is used for producing injection molded parts. The mold for automatically shearing the sprue includes:

[0005] A stationary mold;

[0006] A moving mold, which moves relative to the stationary mold in a first direction. An injection cavity is provided on the side of the moving mold facing the stationary mold;

[0007] A core assembly, which includes a fixed core and a rotating core. The fixed core includes a fixed part fixedly provided on the stationary mold at one end and an injection part placed in the injection cavity at the other end; a rotating hole is provided on the fixed core along the first direction, the rotating core is inserted through the rotating hole and is rotationally matched with the fixed core. The rotating core includes a first rotating end, the first rotating end is placed in the injection cavity and is fixedly connected with the injection molded part in the injection cavity. An injection channel is provided in the injection part, and a sprue integrated with the injection molded part can be formed in the injection channel;

[0008] A driving assembly, the driving assembly is connected with the rotating core, and the driving assembly drives the rotating core to rotate, so that the injection molded part rotates coaxially with the rotating core and is sheared and separated from the sprue.

[0009] As a preferred technical solution of the mold for automatically shearing the stock head, the rotating core further includes a second rotating end opposite to the first rotating end. The driving assembly includes a first driver, a sliding plate, and a swing rod. One end of the swing rod is fixedly connected to the second rotating end and is perpendicular to the axis of the rotating core. The sliding plate is provided with a groove recessed along the first direction, and the groove extends along the second direction. The other end of the swing rod is located in the groove. The sliding plate is slidably arranged on the fixed mold, and the first driver drives the sliding plate to slide along the third direction;

[0010] The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0011] As a preferred technical solution of the mold for automatically shearing the stock head, the swing rod and the rotating core are integrally formed.

[0012] As a preferred technical solution of the mold for automatically shearing the stock head, the sliding plate is provided with a sliding hole along the first direction;

[0013] The first driver includes an inclined guide post. One end of the inclined guide post is fixedly connected to the moving mold, and the other end of the inclined guide post passes through the sliding hole. The other end of the inclined guide post is inclined along the third direction.

[0014] As a preferred technical solution of the mold for automatically shearing the stock head, the other end of the inclined guide post is inclined away from the core assembly.

[0015] As a preferred technical solution of the mold for automatically shearing the stock head, the fixed mold includes an outer fixing member and an inner fixed mold. The side surface of the outer fixing member opposite to the moving mold is recessed with a fixing groove, and the inner fixed mold is inserted into the fixing groove. The inner fixed mold is provided with a fixing hole for accommodating and fixing the fixed core along the first direction.

[0016] As a preferred technical solution of the mold for automatically shearing the stock head, the fixing part is inserted into the fixing hole, the injection part is located outside the fixing hole and can be placed in the injection cavity. The rotating hole sequentially passes through the fixing part and the injection part. The inner fixed mold and the bottom of the fixing groove enclose a driving cavity, the fixing hole communicates with the driving cavity, the sliding plate is slidably arranged in the driving cavity along the third direction, and the swing rod is located in the driving cavity.

[0017] As a preferred technical solution of the mold for automatically shearing the stock head, an oil storage groove is recessed along the circumferential direction on the outer side wall of the rotating core located in the rotating hole.

[0018] As a preferred technical solution of the mold for automatically shearing the stock head, a guide rod is provided on the surface of the fixed mold opposite to the moving mold, the guide rod extends along the first direction, the moving mold is provided with a guide hole along the first direction, and the guide rod is inserted into the guide hole;

[0019] It further includes a jacking assembly, the jacking assembly is connected to the moving mold, and the jacking assembly is used to drive the moving mold to move along the first direction.

[0020] As a preferred technical solution of the mold for automatically shearing the stock head, the rotating core is provided with a second ejection hole along the first direction, and the second ejection hole is collinear with the axis of the rotating core;

[0021] It further includes a second ejection rod, the second ejection rod sequentially passes through the fixed mold and the second ejection hole, the second ejection rod is slidably matched with the rotating core and the fixed mold respectively, one end of the second ejection rod is used to abut against the injection molded part, and the other end abuts against the slider.

[0022] The beneficial effects of the present utility model are as follows:

[0023] The present utility model provides a mold for automatically shearing the stock head, which is used for producing injection molded parts. The mold for automatically shearing the stock head includes a fixed mold, a moving mold, a core assembly and a driving assembly. The moving mold moves relative to the fixed mold along the first direction, and an injection cavity is provided on the side of the moving mold facing the fixed mold; the core assembly includes a fixed core and a rotating core. The fixed core includes a fixed part fixedly arranged on the fixed mold at one end and an injection part placed in the injection cavity at the other end; the fixed core is provided with a rotating hole along the first direction, the rotating core is inserted into the rotating hole and is rotationally matched with the fixed core. The rotating core includes a first rotating end, the first rotating end is placed in the injection cavity and is fixedly connected to the injection molded part in the injection cavity. The injection part is provided with an injection channel, and a stock head integrated with the injection molded part can be formed in the injection channel; the driving assembly is connected to the rotating core, and the driving assembly drives the rotating core to rotate, so that the injection molded part rotates coaxially with the rotating core and is sheared and separated from the stock head. The moving mold slides relative to the fixed mold along the first direction, and the moving mold has a first position where it abuts against the fixed mold and closes the injection cavity and a second position where it is separated from the fixed mold. When using the mold for automatically shearing the stock head to produce injection molded parts, the moving mold and the fixed mold are in the first position. At this time, injection molding is carried out into the injection cavity through the injection channel. After the injection molded part in the injection cavity solidifies, the injection molded part and the stock head in the injection channel are still connected. At this time, the moving mold and the fixed mold are switched to the second position. Since the rotating core is fixedly connected to the injection molded part, the driving assembly drives the rotating core to rotate to drive the rotation of the injection molded part. Since the stock head is located in the injection channel, the stock head will be separated from the injection molded part under the action of external force to realize the function of automatically shearing the stock head, which not only reduces the labor intensity of the staff, but also reduces the labor cost and improves the production efficiency of the injection molded parts. Description of the Drawings

[0024] Figure 1 Schematic diagram of the structure of the mold for automatically shearing the stock head in the embodiment of the present utility model (first position);

[0025] Figure 2 Schematic diagram of the structure of the mold for automatically shearing the stock head in the embodiment of the present utility model (first position);

[0026] Figure 3 Schematic diagram of the structure of the moving mold in the embodiment of the present utility model (first position);

[0027] Figure 4 Schematic diagram of the structure of the mold for automatically shearing the stock head in the embodiment of the present utility model (excluding the moving mold);

[0028] Figure 5 Explosion diagram of the mold for automatically shearing the stock head in the embodiment of the present utility model (excluding the moving mold);

[0029] Figure 6 is Figure 5 Schematic diagram of the structure at position A in;

[0030] Figure 7 Schematic diagram of the structure of the core assembly and the injection molded part in the embodiment of the present utility model;

[0031] Figure 8 is Figure 7 Cross-sectional view at A-A in;

[0032] Figure 9 Schematic diagram of the structure of the drive assembly and the core assembly in the embodiment of the present utility model;

[0033] Figure 10 Schematic diagram of the structure of the outer fixing part in the embodiment of the present utility model;

[0034] Figure 11 Schematic diagram of the structure of the lifting assembly in the embodiment of the present utility model.

[0035] In the figure:

[0036] X, the first direction; Y, the second direction; Z, the third direction;

[0037] 100, injection molded part; 101, stock head;

[0038] 1, fixed mold; 11, outer fixing part; 111, fixing groove; 1111, drive cavity; 1112, sliding groove; 1113, rotating groove; 112, through hole; 12, inner fixed mold; 121, fixing hole; 13, guide rod;

[0039] 2, moving mold; 21, injection cavity; 22, guide hole;

[0040] 3. Core component; 31. Fixed core; 311. Rotation hole; 312. Injection channel; 313. Fixed part; 314. Injection part; 315. First ejection hole; 32. Rotating core; 321. Oil storage tank; 322. Second ejection hole;

[0041] 4. Driving component; 41. Angled guide pillar; 42. Slide plate; 421. Groove; 422. Slide hole; 43. Swing rod;

[0042] 5. Lifting component; 51. Base; 52. Slide block; 53. Lifting rod; 54. Elastic member;

[0043] 61. First ejection rod; 62. Second ejection rod. Detailed implementation manner

[0044] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0046] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0047] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0048] As Figures 1 to 11 shown, this embodiment provides a mold for automatically shearing the material head, which is used to produce injection molded parts 100. The mold for automatically shearing the material head includes a fixed mold 1, a moving mold 2, a core assembly 3 and a driving assembly 4. The moving mold 2 moves relative to the fixed mold 1 in the first direction X. An injection cavity 21 is provided on the side of the moving mold 2 facing the fixed mold 1. The core assembly 3 includes a fixed core 31 and a rotating core 32. The fixed core 31 includes a fixing portion 313 fixedly provided at one end on the fixed mold 1 and an injection portion 314 placed in the injection cavity 21 at the other end. The fixed core 31 is provided with a rotating hole 311 along the first direction X. The rotating core 32 passes through the rotating hole 311 and is rotationally matched with the fixed core 31. The rotating core 32 includes a first rotating end, and the first rotating end is placed in the injection cavity 21 and fixedly connected to the injection molded part 100 in the injection cavity 21. An injection channel 312 is provided in the injection portion 314, and a material head 101 integrated with the injection molded part 100 can be formed in the injection channel 312. The driving assembly 4 is connected to the rotating core 32, and the driving assembly 4 drives the rotating core 32 to rotate, so that the injection molded part 100 rotates coaxially with the rotating core 32 and is sheared and separated from the material head 101. The moving mold 2 slides relative to the fixed mold 1 in the first direction X. The moving mold 2 has a first position in which it abuts against the fixed mold 1 and closes the injection cavity 21 and a second position in which it is separated from the fixed mold 1. When using the mold for automatically shearing the material head to produce the injection molded part 100, the moving mold 2 and the fixed mold 1 are in the first position. At this time, injection is carried out into the injection cavity 21 through the injection channel 312. After the injection molded part 100 in the injection cavity 21 solidifies, the injection molded part 100 and the remaining material head 101 in the injection channel 312 are still connected. At this time, the moving mold 2 and the fixed mold 1 are switched to the second position. Since the rotating core 32 is fixedly connected to the injection molded part 100, the driving assembly 4 drives the rotating core 32 to rotate to drive the rotation of the injection molded part 100. Since the material head 101 is located in the injection channel 312, the material head 101 will be separated from the injection molded part 100 under the action of an external force, so as to realize the function of automatically shearing the material head 101, which not only reduces the labor intensity of the staff, but also reduces the labor cost and improves the production efficiency of the injection molded part 100.

[0049] Optionally, the injection channel 312 is arranged along the first direction X. When the rotating core 32 drives the injection molded part 100 to rotate, a shear stress is generated between the injection molded part 100 and the material head 101, which is beneficial to the cutting of the material head 101.

[0050] Optionally, the fixing portion 313 and the injection portion 314 of the fixed core 31 are arranged along the first direction X.

[0051] Optionally, the axis of the injection cavity 21 is collinear with the axis of the rotating core 32. When the injection molded part 100 rotates, this setting can avoid movement interference between the injection molded part 100 and the injection cavity 21.

[0052] Optionally, the insertion portion of the injection molded part 100 after solidification is sleeved on the rotating core 32. The rotating core 32 is provided with a first clamping member, and the first clamping member is clamped with the second clamping member on the insertion portion in the direction of the rotating shaft of the rotating core 32 to realize the rotation of the rotating core 32 driving the injection molded part 100 in the direction of the rotating shaft of the rotating core 32.

[0053] As Figure 9 shown, optionally, the rotating core 32 further includes a second rotating end opposite to the first rotating end. The driving assembly 4 includes a first driver, a slide plate 42 and a swing rod 43. One end of the swing rod 43 is fixedly connected to the second rotating end of the rotating core 32 and is perpendicular to the axis of the rotating core 32. The slide plate 42 is provided with a groove 421 recessed along the first direction X, and the groove 421 extends along the second direction Y. The other end of the swing rod 43 is located in the groove 421 and is spaced from the groove wall of the groove 421 along the third direction Z. The slide plate 42 is slidably arranged on the fixed mold 1, and the first driver drives the slide plate 42 to slide along the third direction Z; the first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs. In this embodiment, the first driver drives the slide plate 42 to slide along the third direction Z. Since the swing rod 43 is located in the groove 421 of the slide plate 42, the groove 421 extends along the second direction Y, and the swing rod 43 is spaced from the groove wall of the groove 421 along the third direction Z, so that the swing rod 43 can swing around the axis of the rotating core 32 to drive the swing of the rotating core 32.

[0054] Optionally, the swing rod 43 and the rotating core 32 form an integrally molded part. Specifically, it is made by a casting process. This setting can improve the processing accuracy on the one hand and reduce the manufacturing cost on the other hand.

[0055] Optionally, when the first driver drives the slide plate 42 to slide along the third direction Z, the swing rod 43 swings in the groove 421. When the swing rod 43 abuts against the two groove walls of the groove 421 along the third direction Z at the same time, the swing rod 43 cannot continue to drive the rotation of the core 32 to swing. Therefore, the size of the groove wall spacing of the groove 421 along the third direction Z determines the size of the maximum rotation angle of the rotating core 32. Specifically, the swing angle of the rotating core 32 is proportional to the groove wall spacing of the groove 421 along the third direction Z.

[0056] Optionally, the distance between the two groove walls of the groove 421 along the third direction Z gradually increases in the direction pointing to the rotating core 32 along the second direction Y, so that the groove 421 is trapezoidal. This setting is beneficial to increasing the maximum swing angle of the swing rod 43 in the groove 421.

[0057] Optionally, the slide plate 42 is provided with a slide hole 422 along the first direction X; the first driver includes an inclined guide post 41. One end of the inclined guide post 41 is fixedly connected to the moving mold 2, and the other end of the inclined guide post 41 passes through the slide hole 422. The other end of the inclined guide post 41 is inclined along the third direction Z. In this embodiment, one end of the inclined guide post 41 is fixedly connected to the moving mold 2 by bolts; when the moving mold 2 and the fixed mold 1 are switched from the first position to the second position, the moving mold 2 drives the inclined guide post 41 to move along the first direction X. Since the other end of the inclined guide post 41 is inclined along the third direction Z, the inclined guide post 41 can drive the slide plate 42 to move along the third direction Z.

[0058] Optionally, the other end of the inclined guide post 41 is inclined along the third direction Z away from the injection cavity 21. In other embodiments, the other end of the inclined guide post 41 is inclined along the third direction Z towards the injection cavity 21. In addition, a third driver can also be provided to drive the guide post to move along the first direction X. Specifically, the third driver is one of a linear motor, a cylinder, a hydraulic cylinder, a rack and pinion structure, or a lead screw and nut structure.

[0059] Optionally, there are at least two injection cavities 21, and there are at least two core assemblies 3. The core assemblies 3 are arranged in one-to-one correspondence with the injection cavities 21; at least two injection cavities 21 are respectively located on both sides of the slide plate 42 along the second direction Y. There are at least two swing rods 43. One end of the swing rod 43 is fixedly connected to the corresponding rotating core 32. The slide plate 42 is provided with at least two grooves 421, and the other end of the swing rod 43 is arranged in the corresponding groove 421. In this embodiment, the above setting can improve the production efficiency of the injection molded part 100 and reduce the use and production costs of the device.

[0060] As Figure 5 shown, specifically, there are four injection cavities 21. Two injection cavities 21 are located on one side of the slide plate 42 along the second direction Y, and the other two injection cavities 21 are located on the other side of the slide plate 42 along the second direction Y. There are four grooves 421. Two grooves 421 are located on one side of the upper surface of the slide plate 42 along the second direction Y, and the other two grooves 421 are located on the other side of the upper surface of the slide plate 42 along the second direction Y. The four swing rods 43 are arranged in one-to-one correspondence in the four grooves 421. This setting can achieve a reasonable layout of the injection cavities 21 and save the overall occupied space of the mold for automatically shearing the sprue.

[0061] Optionally, at least two fixed core pins 31 are fixedly connected to each other in pairs. In this embodiment, in order to prevent a single fixed core pin 31 from rotating due to insufficient fixation when the injection molded part 100 cuts the sprue 101, at least two fixed core pins 31 are fixedly connected to each other in pairs. At the same time, the above arrangement can also fix the positions of at least two fixed core pins 31 relative to each other, which is conducive to the rapid and accurate installation of the core component 3.

[0062] Optionally, the stationary mold 1 includes an outer fixing member 11 and an inner stationary mold 12. A fixing groove 111 is recessed on a side surface of the outer fixing member 11 opposite to the moving mold 2. The inner stationary mold 12 is inserted into the fixing groove 111. The inner stationary mold 12 and the bottom of the fixing groove 111 enclose a driving cavity 1111. The inner stationary mold 12 is provided with a fixing hole 121 along the first direction X, and the fixing hole 121 communicates with the driving cavity 1111. The fixing portion 313 is inserted into the fixing hole 121, and the injection portion 314 is located outside the fixing hole 121 and can be placed in the injection cavity 21. The rotating hole 311 sequentially penetrates through the fixing portion 313 and the injection portion 314. The slide plate 42 is slidably arranged in the driving cavity 1111 along the third direction Z, and the swing rod 43 is located in the driving cavity 1111. In this embodiment, the fixing portion 313 is inserted into the fixing hole 121 so that the fixing portion 313 cannot rotate around the axis of the rotating hole 311. Optionally, the fixing portion 313 has a non-cylindrical structure, and the hole wall of the fixing hole 121 fits with the fixing portion 313. Specifically, the fixing portion 313 can be one of an elliptic cylinder, a triangular prism, or a quadrangular prism, or a combination of two of an elliptic cylinder, a triangular prism, or a quadrangular prism. In other embodiments, the fixing portion 313 can also be in interference fit with the hole wall of the fixing hole 121. The fixing groove 111 includes a sliding groove 1112 and a rotating groove 1113 communicating with the sliding groove 1112. The slide plate 42 is arranged in the sliding groove 1112, the second rotating end of the rotating core 32 is located in the rotating groove 1113, one end of the swing rod 43 is located in the rotating groove 1113, and the other end is located in the groove 421.

[0063] As Figure 6 shown, optionally, an oil storage groove 321 is recessed along the circumferential direction on the outer side wall of the rotating core 32 located in the rotating hole 311. In this embodiment, lubricating oil is provided in the oil storage groove 321. This arrangement can reduce the friction force of the rotating core 32 rotating in the rotating hole 311, thereby improving the service life of the fixed core pin 31 and the rotating core 32 and reducing the driving force of the first driver. Specifically, a plurality of oil storage grooves 321 are provided, and the plurality of oil storage grooves 321 are arranged along the axial direction of the rotating core 32.

[0064] Optionally, a guide rod 13 is provided on the surface of the fixed mold 1 opposite to the movable mold 2. The guide rod 13 extends along the first direction X. The movable mold 2 is provided with a guide hole 22 along the first direction X, and the guide rod 13 is inserted through the guide hole 22. The mold for automatically shearing the stock head further includes a lifting assembly 5, and the lifting assembly 5 is used to drive the movable mold 2 to switch between a first position and a second position. In this embodiment, the guide rod 13 slides in the guide hole 22 to ensure that the movable mold 2 moves relative to the fixed mold 1 along the first direction X. In other embodiments, the guide rod 13 and the guide hole 22 can also be removed, and the lifting assembly 5 directly drives the movable mold 2 to move.

[0065] As Figure 11 shown, optionally, the fixed mold 1 is provided with a through hole 112 along the first direction X; the lifting assembly 5 includes a base 51, a slider 52, a lifting rod 53 and a second driver. The base 51 is fixedly connected to the side of the fixed mold 1 away from the movable mold 2. The slider 52 is slidably arranged on the base 51 along the first direction X. One end of the lifting rod 53 is fixedly connected to the slider 52, and the other end of the lifting rod 53 passes through the through hole 112 and is fixedly connected to the movable mold 2. The second driver drives the slider 52 to slide on the base 51. In this embodiment, the second driver drives the slider 52 to move along the first direction X, so that the slider 52 drives the lifting rod 53 to move along the first direction X, and finally realizes the movement of the movable mold 2 relative to the fixed mold 1 along the first direction X. Specifically, a plurality of through holes 112 are provided, and the plurality of through holes 112 are arranged at intervals around the circumference of the fixed mold 1. A plurality of lifting rods 53 are provided, and the plurality of lifting rods 53 are inserted into the through holes 112. This setting can further improve the stability of the sliding of the movable mold 2 relative to the fixed mold 1.

[0066] Optionally, for the specific fixing method of the guide rod 13, optionally, one end of the guide rod 13 is fixed on the base 51, and the other end of the guide rod 13 extends along the first direction X and sequentially passes through the fixed mold 1 and the guide hole 22. Since the fixed mold 1 and the base 51 are relatively fixed along the first direction X, the guide rod 13 and the fixed mold 1 are relatively fixed.

[0067] Optionally, the lifting assembly 5 further includes an elastic member 54. The elastic member 54 is arranged between the slider 52 and the fixed mold 1 and abuts against the slider 52 and the fixed mold 1 respectively. In this embodiment, when the movable mold 2 and the fixed mold 1 are in the second position, the elastic member 54 is in a compressed state. When the movable mold 2 and the fixed mold 1 are switched from the second position to the first position, the elastic member 54 drives the slider 52 to move in a direction away from the fixed mold 1, so that the slider 52 can quickly return to its original position.

[0068] Specifically, the elastic member 54 is a helical spring, and the helical spring is sleeved on the lifting rod 53.

[0069] Optionally, the mold for automatically shearing the stock head further includes an ejection assembly. The ejection assembly includes an ejection rod group. The ejection rod group is used to abut against the injection molded part 100 and is used to slide along the first direction X to separate the injection molded part 100 from the stationary mold 1. In this embodiment, when the injection molded part 100 solidifies, the moving mold 2 moves in the first direction X away from the stationary mold 1. At this time, the injection molded part 100 still adheres to the stationary mold 1. Therefore, the ejection assembly can separate the injection molded part 100 from the stationary mold 1 to facilitate the taking of the injection molded part 100.

[0070] Optionally, the fixed core 31 is provided with a first ejection hole 315 along the first direction X. The ejection rod group includes a first ejection rod 61. The first ejection rod 61 sequentially passes through the stationary mold 1 and the first ejection hole 315. The first ejection rod 61 is slidably engaged with the fixed core 31 and the stationary mold 1 respectively. One end of the first ejection rod 61 is used to abut against the injection molded part 100, and the other end is in contact with the slider 52. In this embodiment, by the sliding of the slider 52 relative to the base along the first direction X, and then the first ejection rod 61 extends out of the fixed core 31, the injection molded part 100 can be separated from the fixed core 31. Specifically, a plurality of first ejection holes 315 are provided, and the plurality of first ejection holes 315 are arranged at intervals around the axis of the rotation hole 311 on the fixed core 31. This setting can improve the uniformity of the ejection force of the first ejection rod 61 acting on the injection molded part 100, preventing excessive local stress and causing deformation or damage to the injection molded part 100. In other embodiments, the other end of the first ejection rod 61 can also be connected to a driving member to enable the driving member to drive the first ejection rod 61 to slide along the first direction X.

[0071] Optionally, the rotating core 32 is provided with a second ejection hole 322 along the first direction X. The second ejection hole 322 is collinear with the rotating shaft of the rotating core 32. The ejection rod group further includes a second ejection rod 62. The second ejection rod 62 sequentially passes through the stationary mold 1 and the second ejection hole 322. The second ejection rod 62 is slidably engaged with the rotating core 32 and the stationary mold 1 respectively. One end of the second ejection rod 62 is used to abut against the injection molded part 100, and the other end is in contact with the slider 52. In this embodiment, by the sliding of the slider 52 relative to the base along the first direction X, and then the second ejection rod 62 extends out of the rotating core 32. On the one hand, the second ejection rod 62 can act on the injection molded part 100 to separate the injection molded part 100 from the rotating core 32. On the other hand, it can be used as the rotating fixed shaft of the rotating core 32 to enable the rotating core 32 to rotate around the second ejection rod 62. In other embodiments, the other end of the second ejection rod 62 can also be connected to a driving member to enable the driving member to drive the second ejection rod 62 to slide along the first direction X.

[0072] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A mold for automatically shearing a sprue, used for producing an injection molded part (100), characterized in that: include: Fixed mold (1); A movable mold (2) moves relative to the fixed mold (1) along a first direction (X), and an injection cavity (21) is provided on a side of the movable mold (2) facing the fixed mold (1); A core assembly (3) comprises a fixed core (31) and a rotating core (32), wherein the fixed core (31) comprises a fixed portion (313) fixedly mounted on the fixed mold (1) at one end and an injection portion (314) disposed in the injection cavity (21) at the other end; the fixed core (31) is provided with a rotation hole (311) along the first direction (X); the rotating core (32) is passed through the rotation hole (311) and is rotationally matched with the fixed core (31); the rotating core (32) comprises a first rotating end, which is disposed in the injection cavity (21) and is fixedly connected to the injection molded part (100) in the injection cavity (21); the injection portion (314) is provided with an injection channel (312), and a material head (101) integral with the injection molded part (100) can be formed in the injection channel (312); A driving assembly (4) is connected to the rotating core (32), and the driving assembly (4) drives the rotating core (32) to rotate, so that the injection molded part (100) rotates coaxially with the rotating core (32) and is sheared and separated from the material head (101).

2. The automatic shearing die according to claim 1, characterized in that: The rotating core (32) further comprises a second rotating end opposite to the first rotating end, the driving assembly (4) comprises a first driver, a slide plate (42) and a swing rod (43), one end of the swing rod (43) is fixedly connected to the second rotating end and is perpendicular to the axis of the rotating core (32), the slide plate (42) is provided with a groove (421) concavely arranged along the first direction (X), the groove (421) extends along the second direction (Y), the other end of the swing rod (43) is located in the groove (421), the slide plate (42) is slidably arranged on the fixed mold (1), and the first driver drives the slide plate (42) to slide along the third direction (Z); The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

3. The automatic shearing head mold according to claim 2 is characterized in that: The swing rod (43) and the rotating core (32) are integrally formed.

4. The automatic shearing die according to claim 2, characterized in that: The slide plate (42) is provided with a slide hole (422) along the first direction (X); The first driver comprises an inclined guide column (41), one end of the inclined guide column (41) is fixedly connected to the movable mold (2), the other end of the inclined guide column (41) passes through the sliding hole (422), and the other end of the inclined guide column (41) is inclined along the third direction (Z).

5. The automatic shearing die of claim 4, characterized in that: The other end of the inclined guide column (41) is inclined in a direction away from the core assembly (3).

6. The automatic shearing die of claim 2, characterized in that: The fixed mold (1) comprises an external fixing part (11) and an internal fixed mold (12); a fixing groove (111) is concavely provided on a side surface of the external fixing part (11) opposite to the movable mold (2); the internal fixed mold (12) is inserted into the fixing groove (111); and the internal fixed mold (12) is provided with a fixing hole (121) along the first direction (X) for accommodating and fixing the fixed core (31).

7. The automatic shearing die of claim 6, characterized in that: The fixing portion (313) is inserted into the fixing hole (121), the injection portion (314) is located outside the fixing hole (121) and can be placed in the injection cavity (21), the rotation hole (311) is sequentially penetrated through the fixing portion (313) and the injection portion (314), the inner fixed mold (12) and the bottom of the fixing groove (111) are arranged to form a driving cavity (1111), the fixing hole (121) is communicated with the driving cavity (1111), the slide plate (42) is slidably arranged in the driving cavity (1111) along the third direction (Z), and the swing rod (43) is located in the driving cavity (1111).

8. The automatic shearing die of claim 1, characterized in that: An outer wall of the rotating core (32) located inside the rotating hole (311) is provided with an oil storage groove (321) along the circumferential direction.

9. The automatic shearing die of claim 1, characterized in that: A guide rod (13) is provided on a surface of the fixed mold (1) opposite to the movable mold (2), the guide rod (13) extends along the first direction (X), the movable mold (2) is provided with a guide hole (22) along the first direction (X), and the guide rod (13) is inserted into the guide hole (22); It also comprises a lifting component (5), wherein the lifting component (5) is connected to the movable mold (2), and the lifting component (5) is used to drive the movable mold (2) to move along the first direction (X).

10. The automatic shearing die of claim 1, characterized in that: The rotating core (32) is provided with a second ejection hole (322) along the first direction (X), and the second ejection hole (322) is colinear with the axis of the rotating core (32); The molded part further comprises a second ejector rod (62), wherein the second ejector rod (62) passes through the fixed mold (1) and the second ejector hole (322) in sequence, and the second ejector rod (62) is slidably matched with the rotating core (32) and the fixed mold (1) respectively, and the second ejector rod (62) is used to abut against the injection molded part (100).

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