CN107225737B - Ejection mechanism of injection mold - Google Patents

Ejection mechanism of injection mold Download PDF

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Publication number
CN107225737B
CN107225737B CN201610171835.2A CN201610171835A CN107225737B CN 107225737 B CN107225737 B CN 107225737B CN 201610171835 A CN201610171835 A CN 201610171835A CN 107225737 B CN107225737 B CN 107225737B
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China
Prior art keywords
plate
ejection mechanism
top plate
movable mold
primary
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CN201610171835.2A
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CN107225737A (en
Inventor
于利英
陈煦
吴朋余
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Zhejiang Chint Electrics Co Ltd
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Zhejiang Chint Electrics Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/4005Ejector constructions; Ejector operating mechanisms

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The utility model provides an ejection mechanism of injection mold, it includes the primary ejection mechanism and the secondary ejection mechanism with the ejecting injection chamber of working of plastics, the ejection injection mold is ejected with the working of plastics back secondary ejection mechanism, roof mechanism and primary ejection mechanism and secondary ejection mechanism are connected, roof mechanism includes the slide that promotes the primary ejection mechanism and rise, roof mechanism rises the in-process, the unblock piece drives the slide and slides, and dislocation with primary ejection mechanism, release ejection mechanism to primary ejection mechanism thrust, roof mechanism continues to promote secondary ejection mechanism motion, through the cooperation of slide and unblock piece of roof mechanism, after the slide rises to predetermined distance with primary ejection mechanism dislocation, and release the drive force of roof mechanism to primary ejection mechanism, then follow the drive of roof mechanism by secondary ejection mechanism and rise and with the ejecting injection mold of working of plastics, can effectually decompose the package tight force in the drawing of patterns process through ejecting the working of plastics many times, the problem of solving the product ejection difficulty.

Description

Ejection mechanism of injection mold
Technical Field
The invention relates to the field of plastic molds, in particular to an ejection mechanism of an injection mold.
Background
The injection mold is widely applied in the production of plastic parts, and has a special structure, particularly when the plastic parts are demolded after molding, a cylinder deep wall thin plastic part, a shell and a shell product with a certain shape are arranged in the cylinder deep wall thin plastic part, the thickness of the peripheral side wall is thin, and a thin rib and a deep hole are further arranged in the middle of the shell, so that the plastic parts are tightly packed on a movable mold core, the plastic parts are extremely easy to damage during ejection after molding, the packing force is large, the pressure born on the smaller wall surface is large, the demolding difficulty is inevitably caused, the product quality is seriously affected, the mold volume is increased due to plane demolding, and the parting surface of the mold is increased, so that the mold is complicated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an ejection mechanism of an injection mold with simple structure and high reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the ejector mechanism of the injection mold comprises a primary ejector mechanism 310 and a secondary ejector mechanism 320 which eject a plastic part out of an injection cavity 500, wherein the secondary ejector mechanism 320 ejects the plastic part out of the injection mold after the plastic part is ejected out of the injection cavity 500, a top plate mechanism 350 is connected with the primary ejector mechanism 310 and the secondary ejector mechanism 320, the top plate mechanism 350 comprises a sliding plate 330 which pushes the primary ejector mechanism 310 to rise, in the rising process of the top plate mechanism 350, an unlocking piece 340 drives the sliding plate 330 to slide and misplacement with the primary ejector mechanism 310, the thrust of the sliding plate 330 to the primary ejector mechanism 310 is relieved, and the top plate mechanism 350 continues to push the secondary ejector mechanism 320 to move.
Optionally, the unlocking member 340 is provided with an inclined surface for pushing the sliding plate 330 to be dislocated with the primary ejection mechanism 310.
Optionally, the unlocking member 340 includes a first guiding end 342, a second guiding end 343, and an unlocking portion 341 connected between the first guiding end 342 and the second guiding end 343, the second guiding end 343 has a diameter larger than that of the first guiding end 342, the unlocking portion 341 has a truncated cone structure with a trapezoidal section, and the side edge of the unlocking portion 341 is slidably engaged with the sliding plate 330.
Optionally, the top plate mechanism 350 further includes a top plate pad 353 slidably engaged with the sliding plate 330, and the top plate pad 353 is provided with a sliding plate groove 351 slidably engaged with the sliding plate 330.
Optionally, the top plate mechanism 350 further includes a top plate body 352 disposed on the upper side of the top plate 353, the top plate body 352 and the top plate 353 are used to mount the sliding plate 330 in the sliding plate groove 351 of the top plate 353, the sliding plate 330 is located between the top plate 353 and the top plate body 352, and the top plate mechanism 350 simultaneously guides and drives the sliding plate 330 to slide through the unlocking member 340; a jack post through hole for passing through the jack post 311 of the primary ejection mechanism 310 is arranged on the top plate body 352; the top plate body 352 and the top plate backing plate 353 are respectively provided with an unlocking through hole for the unlocking piece 340 to pass through; the sliding plate 330 is provided with an unlocking hole 331 matched with the unlocking piece 340, and the sliding plate 330 is also provided with a dislocation hole 332 matched with the ejector post 311 of the primary ejection mechanism 310; the unlocking piece 340 sequentially passes through the unlocking through hole of the top plate body 352, the unlocking hole 331 of the sliding plate 330 and the unlocking through hole of the top plate backing plate 353; in the initial state, the dislocation holes 332 of the sliding plate 330 and the jack post through holes of the top plate body 352 are arranged in a dislocation way, and the jack posts 311 of the primary ejection mechanism 310 penetrate through the jack post through holes of the top plate body 352 and are connected with the sliding plate 330; in the lifting process of the top plate mechanism 350, the unlocking piece 340 drives the sliding plate 330 to slide so that the dislocation hole 332 corresponds to the jack post through hole of the top plate body 352, and the jack post 311 of the primary ejection mechanism 310 passes through the dislocation hole 332 to be uncoupled from the top plate mechanism 350.
Optionally, the top plate pad 353 is also provided with a post through hole for passing the post 311 of the primary ejection mechanism 310; the top post through hole of the top plate body 352 and the top post through hole of the top plate backing plate 353 are provided correspondingly.
Optionally, a reset rod 104 for resetting is disposed on the primary ejection mechanism 310, where the reset rod 104 includes an insert guide rod 1041 with one end extending into the movable mold insert 101 of the movable mold plate 100 and a push plate guide rod 1042 with the other end extending into the movable mold push plate 312, a fixed ring 1043 is disposed outside the push plate guide rod 1042, and a step hole mounted in cooperation with the fixed ring 1043 and the push plate guide rod 1042 is disposed in the movable mold push plate 312.
Optionally, one side of the sled 330 is provided with a sled spring 360 that drives the sled 330 back.
Optionally, the secondary ejection mechanism 320 includes a thimble 321 passing through the movable mold core 102 of the movable mold plate 100, the thimble 321 of the secondary ejection mechanism 320 passes through the movable mold core 102 and is disposed below the movable mold core 102, the ejector post 311 of the primary ejection mechanism 310 is disposed on one side of the thimble 321 of the secondary ejection mechanism 320, and pushes the movable mold core 102 through the movable mold push plate 312, the other end of the ejector post 311 is slidably engaged with the slide plate 330, and the movable mold push plate 312 is disposed below a sinking frame for mounting the movable mold insert 101 in the movable mold plate 100.
Optionally, the ejection mechanism of the injection mold of the present invention includes a movable mold plate 100 and a static mold plate 200, wherein a movable mold insert 101 and a movable mold core 102 are disposed in the movable mold plate 100, a static mold bottom plate 201 is disposed on the upper side of the static mold plate 200, a first parting surface a is formed between the static mold bottom plate 201 and the static mold plate 200, a second parting surface B is formed between the static mold plate 200 and the movable mold plate 100, an injection cavity 500 for injecting plastic parts is formed by matching the movable mold core 102 and the movable mold insert 101, one end of the movable mold core 102 of the movable mold plate 100 extends into the side wall of the injection cavity 500, an ejection mechanism 300 is disposed in a movable mold base plate 103 under the movable mold plate 100, and a movable mold spring 106 connected between a top plate mechanism 350 of the ejection mechanism 300 and the movable mold plate 100 is disposed in the movable mold base plate 103; the device also comprises a support column 204 connected with the static die bottom plate 201, wherein the other end of the support column 204 sequentially passes through the static die plate 200 and the movable die plate 100, and the other end of the support column 204 is arranged in the movable die bottom plate 103 through a limit screw 2041 and a support column pad 2042 to form a distance pull rod; an opening spring 202 is provided between the stationary platen 200 and the stationary platen base 201.
According to the ejection mechanism of the injection mold, through the cooperation of the sliding plate of the top plate mechanism and the unlocking piece, the sliding plate is misplaced with the primary ejection mechanism after being lifted to a preset distance, the driving force of the top plate mechanism to the primary ejection mechanism is relieved, then the secondary ejection mechanism is driven by the top plate mechanism to continuously lift and eject a plastic part out of the injection mold, and the plastic part is ejected for many times, so that the packing force and the friction force in the demolding process can be effectively decomposed, and the problem of difficult ejection of a product can be solved. In addition, the unlocking piece adopts a cylindrical structure, so that the sliding plate can be pushed to slide in the ascending process of the sliding plate, the beneficial characteristics of guiding the movement direction of the ejection mechanism can be achieved, and the sliding plate spring is arranged on one side of the sliding plate, so that the sliding plate and the unlocking piece are more stably matched, and the sliding plate can be automatically reset after the secondary ejection action is finished.
Drawings
FIG. 1 is a schematic view of a plastic part of an ejection mechanism of an injection mold of the present invention;
FIG. 2 is a schematic view of the ejection mechanism of the injection mold of the present invention;
FIG. 3 is an exploded view of the ejection mechanism of the injection mold of the present invention;
FIG. 4 is a cross-sectional view of another embodiment of an ejection mechanism of an injection mold of the present invention;
FIG. 5 is a schematic view of the structure of an unlocking member of the ejection mechanism of the injection mold of the present invention;
FIG. 6 is an enlarged partial cross-sectional view of another embodiment of an ejection mechanism of an injection mold of the present invention;
FIG. 7 is a schematic view of the guide shaft of the ejection mechanism of the injection mold of the present invention;
fig. 8 is a schematic structural view of another embodiment of an ejection mechanism of an injection mold of the present invention.
Detailed Description
Specific embodiments of ejection mechanisms of injection molds of the present invention are further described below in conjunction with the examples set forth in fig. 1-8. The ejection mechanism of the injection mold of the present invention is not limited to the description of the following embodiments.
Fig. 1 shows the structure of a plastic part processed according to an embodiment of the present invention, in which the plastic part is a square cylindrical shell, the thickness of the peripheral side wall is thin, and thin ribs and deep holes are further provided in the middle of the shell, so that the plastic part is easily damaged during ejection after molding. The ejection mechanism of the injection mold can decompose the packing force and the friction force in the demolding process, can solve the problems of difficult ejection of products, easy damage of plastic parts and the like, and can further improve the production efficiency of the mold.
As shown in fig. 2 to 4, the injection molding device of the present invention comprises a movable mold plate 100 and a stationary mold plate 200, wherein a movable mold insert 101 and a movable mold core 102 are arranged in the movable mold plate 100, a stationary mold bottom plate 201 is arranged on the upper side of the stationary mold plate 200, a first parting surface a is formed between the stationary mold bottom plate 201 and the stationary mold plate 200, a second parting surface B is formed between the stationary mold plate 200 and the movable mold plate 100, an injection cavity 500 for injecting plastic parts is formed by matching the movable mold core 102 and the movable mold insert 101, and one end of the movable mold core 102 of the movable mold plate 100 extends into the injection cavity 500;
the ejector mechanism 300 is arranged in the movable mould base plate 103 below the movable mould plate 100, the ejector mechanism 300 comprises a primary ejector mechanism 310 and a secondary ejector mechanism 320 which eject a plastic part out of the injection cavity 500, the secondary ejector mechanism 320 ejects the plastic part out of the injection mould after ejecting the plastic part out of the injection cavity 500, the top plate mechanism 350 is connected with the primary ejector mechanism 310 and the secondary ejector mechanism 320, the top plate mechanism 350 comprises a sliding plate 330 which pushes the primary ejector mechanism 310 to lift, in the lifting process of the top plate mechanism 350, the unlocking piece 340 drives the sliding plate 330 to slide and misplacement with the primary ejector mechanism 310, the thrust of the sliding plate 330 to the primary ejector mechanism 310 is relieved, and the top plate mechanism 350 continues to push the secondary ejector mechanism 320 to move.
In the ejection mechanism of the injection mold, when the ejection mechanism of the injection mold is in the first ejection action, the primary ejection mechanism 310 and the secondary ejection mechanism 320 are driven to simultaneously ascend through the top plate mechanism 350, the secondary ejection mechanism 320 is contacted with a plastic part and simultaneously pushes the plastic part with the movable mold core 102 driven by the primary ejection mechanism 310, in the ascending process, the sliding plate 301 slides relatively with the primary ejection mechanism 310 under the action of the unlocking piece 340, when the sliding plate 330 ascends to a preset distance, the movable mold insert 101 forming the injection cavity 500 is ejected by the movable mold core 102 of the plastic part, the sliding plate 330 is dislocated with the primary ejection mechanism 310 and releases the thrust to the primary ejection mechanism 310, at the moment, the movable mold core 102 stops moving, and the second ejection action starts, and the secondary ejection mechanism 320 is driven to continuously ascend through the top plate mechanism 350 and ejects the plastic part out of the movable mold core 102.
The secondary ejection mechanism 320 includes a thimble 321 passing through the movable mold core 102 of the movable mold plate 100, the thimble 321 of the secondary ejection mechanism 320 passes through the movable mold core 102 and is disposed below the movable mold core 102, the ejector post 311 of the primary ejection mechanism 310 is disposed at one side of the thimble 321 of the secondary ejection mechanism 320, and pushes the movable mold core 102 through the movable mold push plate 312, the other end of the ejector post 311 is in sliding fit with the sliding plate 330, the movable mold push plate 312 is disposed below a sinking frame for installing the movable mold insert 101 in the movable mold plate 100, a space for the movable mold push plate 102 to move is disposed below the movable mold insert 101, and a certain distance is left between the movable mold push plate 102 and the movable mold insert 101 during mold closing.
Specifically, the unlocking piece 340 of the ejection mechanism is provided with an inclined surface for pushing the sliding plate 330 to be dislocated with the primary ejection mechanism 310, the sliding plate 330 contacts with the inclined surface in the lifting process, and the sliding plate 330 is pushed by the inclined surface to generate relative sliding with the primary ejection mechanism 310. Fig. 5 is a preferred embodiment of the present invention, the unlocking member 340 includes a first guiding end 342, a second guiding end 343, and an unlocking portion 341 connected between the first guiding end 342 and the second guiding end 343, the second guiding end 343 has a larger diameter than the first guiding end 342, the unlocking portion 341 has a truncated cone structure with a trapezoid cross section, the side edge of the unlocking portion 341 is slidably matched with the sliding plate 330, the second guiding end 343 is fixedly connected with the movable mold plate 100, and provides a guiding function during the second ejection, the first guiding end 342 is fixedly connected with the movable mold bottom plate 105, and provides a guiding function during the first ejection, and the unlocking member 340 simultaneously plays a guiding function of the top plate mechanism 350 and a sliding function of the driving sliding plate 330. Of course, as other embodiments of the present invention, the unlocking member 340 may be implemented by other structures, including a rod structure provided on the ascending path of the top plate mechanism 350 and inclined, or a bump structure having an inclined surface, and the inclined surface cooperates with the sliding plate 330 to automatically form a dislocation with the primary ejection mechanism 310 after the sliding plate 330 ascends to a predetermined distance, which is not particularly limited herein. In addition, as another specific embodiment of the present invention, the inclined surface may be disposed on the sliding plate 330 and cooperate with the unlocking member 340, and the unlocking member 340 may be a bump or rod-shaped structure fixed in the mold, and the sliding plate 330 and the primary ejection mechanism 310 may slide relatively by pushing the inclined surface disposed on the sliding plate 330 by the unlocking member 340. In one preferred embodiment of the present invention, the second guiding ends 343 of all the unlocking members 340 are provided with distance adjusting screws 344, and the distance adjusting screws 344 can adjust the height of the unlocking members 340 so as to adapt to the length of the top post 311, thereby facilitating processing.
Further, as shown in fig. 6 and 7, in the specific structure of the sliding plate 330, the sliding plate 330 is provided with an unlocking hole 331 that is matched with the unlocking piece 340, the sliding plate 330 is further provided with a dislocation hole 332 that is matched with the jack post 311 of the primary ejection mechanism 310, before the second ejection action starts, the bottom end of the jack post 311 is pushed against one side on the circumference of the dislocation hole 332, the dislocation hole 332 of the sliding plate 330 is arranged in dislocation with the jack post through holes 3522, 3532 of the top plate mechanism 350, when the second ejection action starts, the dislocation hole 332 slides to a position where the axis coincides with the axis of the jack post 311, so that the jack post 311 falls into the dislocation hole 332, and at this time, the pushing force of the sliding plate 330 to the jack post 311 is released.
Referring to fig. 4, the top plate mechanism 350 further includes a top plate pad 353 slidably engaged with the sliding plate 330, and the top plate pad 353 is provided with a sliding plate groove 351 slidably engaged with the sliding plate 330, so as to ensure a stable sliding engagement between the sliding plate 330 and the unlocking member 340. As a preferred implementation manner of the present embodiment, the top plate mechanism 350 further includes a top plate body 352 disposed on an upper side of the top plate pad 353, the slide plate 330 is mounted in the slide plate groove 351 of the top plate pad 353 through the top plate body 352 and the top plate pad 353, top column through holes 3522 and 3532 for passing the top column 311 of the primary ejection mechanism 310 and unlocking through holes 3521 and 3531 for passing the unlocking member 340 are respectively provided on the top plate body 352 and the top plate pad 353, the slide plate 330 is located between the top plate pad 353 and the top plate body 352, and the top plate mechanism 350 simultaneously guides and drives the slide plate 330 to slide through the unlocking member 340; the sliding plate 330 is provided with an unlocking hole 331 matched with the unlocking piece 340, and the sliding plate 330 is also provided with a dislocation hole 332 matched with the ejector post 311 of the primary ejection mechanism 310; the unlocking piece 340 sequentially passes through the unlocking through hole of the top plate body 352, the unlocking hole 331 of the sliding plate 330 and the unlocking through hole of the top plate backing plate 353; the top column through holes of the top plate body 352 and the top column through holes of the top plate backing plate 353 are correspondingly arranged, in an initial state, the dislocation holes 332 of the sliding plate 330 and the top column through holes of the top plate body 352 are arranged in a dislocation manner, and the top column 311 of the primary ejection mechanism 310 passes through the top column through holes of the top plate body 352 and is connected with the sliding plate 330; in the lifting process of the top plate mechanism 350, the unlocking piece 340 drives the sliding plate 330 to slide so that the dislocation hole 332 corresponds to the jack post through hole of the top plate body 352, and the jack post 311 of the primary ejection mechanism 310 passes through the dislocation hole 332 to be uncoupled from the top plate mechanism 350. As a preferred implementation manner of this embodiment, by reducing the thickness of the sliding plate 330 by an appropriate amount, and correspondingly arranging the post through holes 3532 on the top plate pad 353, into which the ejection mechanism 310 falls, the inclination angle of the inclined plane can be conveniently adjusted, so that the overall structure is more compact, and the lifting process of the ejection mechanism is smoother. Wherein, the thickness of the sliding plate 330 is smaller than the thickness of the top plate body 352 and the top plate pad 353. Of course, as another specific embodiment, after the sliding plate 330 is dislocated from the primary ejection mechanism 310, by increasing the thickness of the sliding plate 330, the primary ejection mechanism 310 does not fall into the top plate 353, and the top plate 353 may not be provided with the post through hole 3531, but as the thickness of the sliding plate 330 increases, the pushing force of the unlocking member 340 on the sliding plate 330 in the horizontal plane also decreases. The top plate pad 353 is connected to the ejector pin 321 of the secondary ejection mechanism 320, and the ejector pin 321 of the secondary ejection mechanism 320 may be disposed on the top plate body 352. Before the start of one ejection action, the unlocking portion 341 of the unlocking piece 340 is provided in the unlocking through hole 3521. During the first ejection, the unlocking through hole 3521 is matched with the second guiding end 343 of the unlocking piece 340 for guiding, the ejection post through hole 3522 is matched with the primary ejection mechanism 310 for guiding, and after the second ejection, the unlocking through hole 3521 is matched with the unlocking piece 340 for guiding, and the ejection post 311 of the primary ejection mechanism 310 falls into the ejection post through hole 3522 and the dislocation hole 332 of the sliding plate 330.
Further, a slide spring 360 for driving the slide 330 to reset is provided on one side of the slide 330, as a preferred embodiment of this embodiment, the slide spring 360 is a compression spring provided at one end of the slide 330 far away from the unlocking member 340, the other end is abutted against the top plate pad 353 of the top plate mechanism 350, and is fixed in the top plate pad 353 by a screw, the slide spring 360 continuously applies a pushing force for continuously pressing the unlocking member 340 on the slide 330, so that the slide 330 is stably in sliding fit with the unlocking member 340, and the movement of the slide 330 is convenient to control, and in addition, by the arrangement of the slide spring 360, the slide 330 can be automatically reset after the ejection action is completed. The slide spring 360 may be a tension spring disposed at an end of the slide 330 near the unlocking member 340.
As shown in fig. 4, a preferred embodiment of the present invention, the injection molding device of the present invention comprises a movable mold plate 100 and a stationary mold plate 200, wherein a movable mold insert 101 and a movable mold core 102 are arranged in the movable mold plate 100, a stationary mold bottom plate 201 is arranged at the upper side of the stationary mold plate 200, a first parting surface a is formed between the stationary mold bottom plate 201 and the stationary mold plate 200, a second parting surface B is formed between the stationary mold plate 200 and the movable mold plate 100, an injection cavity 500 for injecting plastic parts is formed by matching the movable mold core 102 and the movable mold insert 101, one end of the movable mold core 102 of the movable mold plate 100 extends into the side wall of the injection cavity 500, an ejection mechanism 300 is arranged in a movable mold base plate 103 below the movable mold plate 100, a primary ejection mechanism 310 of the ejection mechanism 300 is used for driving the movable mold core 102 to push the plastic parts out of the injection cavity 500, one end of the primary ejection mechanism 310 is connected with a sliding plate 330 of the ejection mechanism 300, the other end of the primary ejection mechanism 310 is connected with a movable mold push plate 312 pushing the movable mold core 102, a secondary ejection mechanism 320 is used for ejecting the plastic parts out of the movable mold core 102, one end of the secondary ejection mechanism 320 is connected with a top plate 103 of the ejection mechanism 300, and the other end of the ejection mechanism 300 is connected with the movable mold base plate 103 through a spring plate 102 and extends into the side wall of the movable mold plate 106, which is arranged between the movable mold plate 102 and the movable mold plate 106 and the ejection mechanism 106; the primary ejection mechanism 310 is provided with a reset rod 104 for reset, specifically referring to fig. 7, the reset rod 104 includes an insert guide rod 1041 with one end extending into the movable mold insert 101 of the movable mold plate 100 and a push plate guide rod 1042 with the other end extending into the movable mold push plate 312, a fixed ring 1043 is arranged outside the push plate guide rod 1042, and a step hole mounted in cooperation with the fixed ring 1043 and the push plate guide rod 1042 is arranged in the movable mold push plate 312. Of course, as other embodiments of the present invention, the primary ejection mechanism 310 and the secondary ejection mechanism 320 of the ejection mechanism 300 may be matched with other mechanisms of the injection mold to perform demolding of the product, and are not limited to the demolding sequence of the product in this embodiment.
Further, referring to fig. 4, the mold further includes a support 203 connected to the stationary mold base 201, the other end of the support 203 sequentially passes through the stationary mold plate 200 and the movable mold plate 100, and the other end is mounted in the movable mold base 103 through a limit screw 2031 and a support pad 2032 to form a distance pull rod; the injection mold is characterized in that an opening spring 202 is arranged between a static mold plate 200 and a static mold bottom plate 201, during mold opening, under the action force of the opening spring 202, the injection mold is separated from a first parting surface A, then a manipulator is used for taking out a stub bar 204 in the static mold plate 200, after the stub bar 204 is taken out, the injection mold continues to open, under the driving of a support column 203, the mold is opened at a second parting surface B between a movable mold plate 100 and the static mold plate 200, then the ejector mechanism starts to work, a primary ejector mechanism 310 and a secondary ejector mechanism 320 are driven by a top plate mechanism 350 to act, wherein a thimble 321 of the secondary ejector mechanism 320 is contacted with the inner surface of a plastic part, simultaneously, the movable mold core 102 ejects the plastic part out of a movable mold insert 101 together with the thimble 321 through the driving of the primary ejector mechanism 310 to complete primary ejection action, at this moment, due to the pushing of an upper inclined surface of an unlocking piece 340, a slide plate 330 and the primary ejector mechanism 310 are in a misplaced sliding manner, the axis of a misplacement hole 332 on the slide plate 330 is compressed by the slide plate spring 360, after the axis of the ejection hole 332 coincides with the axis of the ejection mechanism 311, the ejector plate 311 falls into the misplacement hole 332, the ejector plate 312 stops and the ejector plate 102 moves tightly, the ejector plate 102 moves up to the secondary ejector mechanism 102, and the secondary ejector mechanism continues to stop the movement of the movable mold core 102, and the secondary ejector mechanism moves up to the secondary ejector mechanism 102, thereby the production efficiency of the injection mold core 102 is reasonably completed, and the production efficiency of the injection mold core 102 is further improved.
The adjectives of upper, ascending, and the like in the present invention are merely for describing the relative positions and movement relationships between the respective mechanisms and the components, and are not intended to limit the present invention in any way.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims (10)

1. An ejection mechanism of an injection mold, which is characterized in that: the injection molding machine comprises a primary ejection mechanism (310), a secondary ejection mechanism (320) and a movable mold plate (100), wherein the top plate mechanism (350) is connected with the primary ejection mechanism (310) and the secondary ejection mechanism (320), the top plate mechanism (350) comprises a sliding plate (330) pushing the primary ejection mechanism (310) to ascend, the movable mold core (102) is arranged in the movable mold plate (100), an ejector post (311) of the primary ejection mechanism (310) pushes the movable mold core (102) through a movable mold push plate (312), the other end of the ejector post (311) is in sliding fit with the sliding plate (330), the secondary ejection mechanism (320) comprises an ejector pin (321) penetrating through the movable mold core (102) of the movable mold plate (100), the ejector pin (321) of the secondary ejection mechanism (320) penetrates through the movable mold core (102) and is arranged below the movable mold core (102), the primary ejection mechanism (310) and the secondary ejection mechanism (320) are driven to act through the top plate mechanism (350), the ejector pin (321) contacts with the inner surface of a plastic part, meanwhile, the ejector pin (321) of the movable mold core (102) is driven by the movable mold core (102) to move together with the ejector pin (500), the unlocking piece (340) drives the sliding plate (330) to slide and misplacement with the primary ejection mechanism (310), the thrust of the sliding plate (330) to the primary ejection mechanism (310) is relieved, the movable mold core (102) stops moving, the top plate mechanism (350) continues to push the secondary ejection mechanism (320) to move, the ejector pin (321) of the secondary ejection mechanism (320) continues to move upwards along with the top plate mechanism (350) and ejects the plastic piece out of the movable mold core (102) to complete the secondary ejection action.
2. The ejection mechanism of an injection mold of claim 1, wherein: the unlocking piece (340) is provided with an inclined surface for pushing the sliding plate (330) to be dislocated with the primary ejection mechanism (310).
3. The ejection mechanism of an injection mold of claim 2, wherein: the unlocking piece (340) comprises a first guiding end (342), a second guiding end (343) and an unlocking part (341) connected between the first guiding end (342) and the second guiding end (343), the diameter of the second guiding end (343) is larger than that of the first guiding end (342), the unlocking part (341) is of a round platform structure with a trapezoid cross section, and the side edge of the unlocking part (341) is in sliding fit with the sliding plate (330).
4. The ejection mechanism of an injection mold of claim 1, wherein: the top plate mechanism (350) further comprises a top plate base plate (353) which is in sliding fit with the sliding plate (330), and a sliding plate groove (351) which is in sliding fit with the sliding plate (330) is formed in the top plate base plate (353).
5. The ejection mechanism of an injection mold of claim 4, wherein: the top plate mechanism (350) further comprises a top plate body (352) arranged on the upper side of the top plate base plate (353), the sliding plate (330) is arranged in a sliding plate groove (351) of the top plate base plate (353) through the top plate body (352) and the top plate base plate (353), the sliding plate (330) is positioned between the top plate base plate (353) and the top plate body (352), and the top plate mechanism (350) simultaneously guides and drives the sliding plate (330) to slide through the unlocking piece (340); a jack post through hole for passing through a jack post (311) of the primary ejection mechanism (310) is arranged on the top plate body (352); unlocking through holes for the unlocking piece (340) to pass through are formed in the top plate body (352) and the top plate base plate (353); an unlocking hole (331) matched with the unlocking piece (340) is formed in the sliding plate (330), and a dislocation hole (332) matched with the ejector column (311) of the primary ejection mechanism (310) is formed in the sliding plate (330); the unlocking piece (340) sequentially passes through the unlocking through hole of the top plate body (352), the unlocking hole (331) of the sliding plate (330) and the unlocking through hole of the top plate backing plate (353); in an initial state, a dislocation hole (332) of the sliding plate (330) and a jack post through hole of the top plate body (352) are arranged in a dislocation way, and a jack post (311) of the primary ejection mechanism (310) penetrates through the jack post through hole of the top plate body (352) to be connected with the sliding plate (330); in the ascending process of the top plate mechanism (350), the unlocking piece (340) drives the sliding plate (330) to slide so that the dislocation hole (332) corresponds to the jack post through hole of the top plate body (352), and the jack post (311) of the primary ejection mechanism (310) passes through the dislocation hole (332) to be disconnected with the top plate mechanism (350).
6. The ejection mechanism of an injection mold of claim 5, wherein: the top plate backing plate (353) is also provided with a jacking column through hole for passing through a jacking column (311) of the primary ejection mechanism (310); the top column through hole of the top plate body (352) and the top column through hole of the top plate backing plate (353) are correspondingly arranged.
7. The ejection mechanism of an injection mold of claim 1, wherein: be equipped with on ejection mechanism (310) once and be used for reset release lever (104), release lever (104) are including insert guide bar (1041) in insert (101) of movable mould of one end stretch into movable mould board (100) and push pedal guide bar (1042) in the other end stretch into movable mould push pedal (312), are equipped with solid fixed ring (1043) in push pedal guide bar (1042) outside, are equipped with in movable mould push pedal (312) with solid fixed ring (1043) and push pedal guide bar (1042) cooperation installation's step hole.
8. The ejection mechanism of an injection mold according to any one of claims 1 to 7, wherein: one side of the sliding plate (330) is provided with a sliding plate spring (360) for driving the sliding plate (330) to reset.
9. The ejection mechanism of an injection mold according to any one of claims 1 to 7, wherein: the ejector column (311) of the primary ejection mechanism (310) is arranged on one side of the ejector pin (321) of the secondary ejection mechanism (320), and the movable die pushing plate (312) is arranged below a sinking frame for installing the movable die insert (101) in the movable die plate (100).
10. The ejection mechanism of an injection mold according to any one of claims 1 to 7, wherein: the injection molding machine comprises a movable mold plate (100), and is characterized by further comprising a fixed mold plate (200), wherein a movable mold insert (101) is further arranged in the movable mold plate (100), a fixed mold bottom plate (201) is arranged on the upper side of the fixed mold plate (200), a first parting surface A is formed between the fixed mold bottom plate (201) and the fixed mold plate (200), a second parting surface B is formed between the fixed mold plate (200) and the movable mold plate (100), an injection cavity (500) for injecting plastic parts is formed by matching a movable mold core (102) with the movable mold insert (101), one end of the movable mold core (102) of the movable mold plate (100) stretches into the side wall of the injection cavity (500), an ejection mechanism (300) comprises a primary ejection mechanism (310), a secondary ejection mechanism (320) and a top plate mechanism (350), the ejection mechanism (300) is arranged in a movable mold base plate (103) below the movable mold plate (100), and a movable mold spring (106) connected between the top plate mechanism (350) of the ejection mechanism (300) and the movable mold plate (100) is arranged in the movable mold base plate (103); the device also comprises a support column (204) connected with the static die bottom plate (201), the other end of the support column (204) sequentially passes through the static die plate (200) and the movable die plate (100), and the other end of the support column is arranged in the movable die bottom plate (103) through a limit screw (2041) and a support column pad (2042) to form a distance pull rod; a die opening spring (202) is arranged between the static die plate (200) and the static die bottom plate (201).
CN201610171835.2A 2016-03-24 2016-03-24 Ejection mechanism of injection mold Active CN107225737B (en)

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CN115871127B (en) * 2023-02-14 2023-05-05 汕头市三润机电科技有限公司 Raw material pretreatment equipment

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