CN216300029U - Straight rod drive type sliding block mechanism and injection mold - Google Patents

Abstract

The application provides a straight-bar drive type sliding block mechanism and an injection mold, which are used for forming an injection molding workpiece with an inverted buckle structure. The injection molding device comprises a jacking unit, a guide piece and a sliding block, wherein the jacking unit comprises a needle plate group, a thimble and an ejector rod, the thimble and the ejector rod are connected with the needle plate group, and the thimble is used for jacking an injection molding workpiece; the ejector rod is provided with a first driving part; the guide member has a first guide slope; the sliding block is connected with the first guide inclined plane in a sliding mode, the sliding block is provided with a second driving part and a forming part used for forming a reverse buckling structure of an injection molding workpiece, the ejector rod is connected with the sliding block in a sliding mode, and the first driving part is used for abutting against the second driving part; the needle plate group is used for driving the ejector pins and the ejector rods to move along the die opening direction, so that the ejector pins lift the injection molding workpiece, meanwhile, the second driving portion drives the sliding blocks to slide relative to the first guide inclined planes under the driving of the first driving portion, and the forming portion is pulled away from the inverted buckle structure. Simple and reasonable structure, high injection molding efficiency and high molding quality.

Description

Straight rod drive type sliding block mechanism and injection mold

Technical Field

The utility model relates to the field of mold manufacturing, in particular to a straight rod driving type sliding block mechanism and an injection mold.

Background

When the injection-molded plastic part is provided with the inverted buckle structures such as holes, recesses or bosses on the outer side in the direction different from the mold opening and closing direction, the plastic part cannot be ejected out of the mold by an ejection mechanism such as an ejector pin directly, at the moment, a slide block on the mold for molding the part must be designed into a movable mold core capable of moving laterally, so that the laterally molded slide block is firstly pulled out before the plastic part is ejected out of the mold, then the plastic part is ejected out of the mold, otherwise, the mold cannot be ejected, the product cannot be ejected, and the whole mechanism for driving the laterally molded part to perform lateral parting core pulling is called a slide block core pulling mechanism.

The inventor researches and discovers that the existing sliding block core-pulling mechanism at least has the following defects:

the structure is complex, and the synergic movement effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a straight rod driving type sliding block mechanism and an injection mold, which can simplify the mold structure, synchronously perform mold ejection action and core pulling action and have good synergistic motion effect.

The embodiment of the utility model is realized by the following steps:

in a first aspect, the present invention provides a straight rod driven sliding block mechanism, including:

the jacking unit comprises a needle plate group, a thimble and a mandril, the thimble and the mandril are connected with the needle plate group, and the thimble is used for jacking the injection molding workpiece; the ejector rod is provided with a first driving part;

a guide having a first guide slope forming an acute angle with the mold opening and closing direction;

the sliding block is connected with the first guide inclined plane in a sliding mode, the sliding block is provided with a second driving part and a forming part used for forming the inverted buckle structure, the ejector rod is connected with the sliding block in a sliding mode, and the first driving part is used for abutting against the second driving part;

the needle plate set is used for driving the ejector pins and the ejector rods to move along the die opening direction, so that the ejector pins jack the injection molding workpiece, and the second driving portion drives the sliding blocks to slide relative to the first guide inclined planes under the driving of the first driving portion, and the forming portion is pulled away from the inverted buckle structure.

In an alternative embodiment, the first drive portion is provided as a drive recess having a slot sidewall disposed at an angle to the first guide ramp; the second driving portion is provided as a driving projection which is slidably connected with the groove side wall.

In an optional embodiment, the ejector rod is further provided with a guide groove communicated with the driving groove, and the guide groove extends along the axial extension direction of the ejector rod; the driving protrusion is provided with a first driving surface and a second driving surface which are connected and arranged at an acute angle or an obtuse angle, and the first driving surface is used for being in sliding connection with the groove side wall; the second driving surface is used for being connected with the groove wall of the guide groove in a sliding manner; when the driving protrusion slides away from the driving groove and slides in the guide groove, the slider and the first guide slope are kept static.

In an alternative embodiment, the slot side wall and the first guide ramp are perpendicular to each other.

In an optional embodiment, the slider comprises a slider body, the slider body is provided with a limiting through hole and an assembling hole communicated with the limiting through hole, and the driving protrusion penetrates through the assembling hole and extends into the limiting through hole; the ejector rod penetrates through the limiting through hole, the ejector rod and the limiting through hole are connected in a sliding mode in the axis extending direction of the limiting through hole, and a distance is formed between the ejector rod and the limiting through hole in the direction perpendicular to the axis of the limiting through hole.

In an alternative embodiment, the ejector rod and the needle plate set are connected in a sliding mode along the axial extension direction of the ejector rod, so that the ejector rod has a first position in a mold closing state and a second position in an mold opening state, and the first driving part and the second driving part have a distance when the ejector rod is located at the first position; when the first driving part is located at the second position, the first driving part is abutted against the second driving part; the needle plate group is provided with an elastic reset piece, and the elastic reset piece is abutted to the ejector rod and used for enabling the ejector rod to have the trend of moving from the first position to the second position.

In an optional embodiment, the needle plate group comprises a panel and a bottom plate which are connected, the panel is provided with a first through hole and a second through hole which are communicated, and the aperture of the first through hole is smaller than that of the second through hole, so that a limiting surface is formed at the communication position of the first through hole and the second through hole; the ejector rod comprises a rod body and a limiting bulge which are connected, the rod body penetrates through the first through hole and the second through hole at the same time, and when the ejector rod is located at the second position, the limiting bulge is abutted against the limiting surface; the elastic reset piece is arranged between the bottom plate and the ejector rod.

In an optional embodiment, the straight rod-driven sliding block mechanism further comprises a cushion block, and a second guide inclined surface parallel to the first guide inclined surface is arranged on the cushion block.

In an alternative embodiment, an oil groove is provided on the second guide slope.

In a second aspect, the present invention provides an injection mold comprising:

the straight rod driven slider mechanism of any of the preceding embodiments.

The embodiment of the utility model has the beneficial effects that:

in summary, in the straight rod-driven slider mechanism provided by this embodiment, the ejector rod is installed on the needle plate group, the ejector rod is directly matched with the slider through the first driving portion and the second driving portion, after the mold is opened, the needle plate group drives the ejector pin to eject a product, the ejector rod moves relative to the slider, the first driving portion is matched with the second driving portion, the slider can move relative to the guide, in the process that the slider is ejected together with the product, the slider moves away from the product at the same time, the forming portion on the slider is separated from the inverted buckle structure on the injection molding workpiece, that is, the ejection action and the core pulling action of the product are performed synchronously, and the product demolding efficiency is high. The slide block is directly matched with the needle plate group through the ejector rod, so that the structure is simplified, the size of the die is reduced, and the cost of the die is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of an injection molded workpiece according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an injection mold according to an embodiment of the present invention (front mold not shown);

FIG. 3 is a schematic cross-sectional view of an injection mold according to an embodiment of the present invention (front mold not shown);

FIG. 4 is a schematic structural diagram of a straight rod driven type sliding block mechanism according to an embodiment of the present invention;

FIG. 5 is an exploded schematic view of a straight rod driven slider mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional structural view of a straight rod driven slider mechanism according to an embodiment of the present invention;

FIG. 7 is a partially enlarged view of FIG. 6;

FIG. 8 is a schematic structural diagram of a carrier rod according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second driving portion according to an embodiment of the utility model.

Icon:

001-injection molding a workpiece; 010-inverted structure; 100-a substrate; 200-square iron; 300-back mold; 400-straight rod driving type sliding block mechanism; 410-a jacking unit; 411-a driver; 412-a needle board group; 4121-a base plate; 41211-mounting holes; 4122-a panel; 41221-a first via; 41222-a second via; 41223-limiting surface; 4123-locking cap; 413-thimble; 414-a mandril; 4141-rod body; 4142-stop protrusion; 4143 — first driving part; 41431-first trench sidewall; 41432-second trench sidewalls; 4144-guide grooves; 420-a guide; 421-a first guiding ramp; 430-a slider; 431-a slider body; 4311-limit through holes; 4312-assembly hole; 4313-forming section; 432-a second drive section; 4321-mounting plate; 4322-shifting block; 43221-a first mating face; 43222-first guide surface; 43223-second mating face; 43224-second guide surface; 440-an elastic restoring member; 500-cushion block; 510-a second guiding ramp; 520-oil groove; 600-wear resistant block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 3, the present embodiment provides an injection mold for injection molding an injection workpiece 001 having an undercut structure 010, it should be understood that the number of the undercut structures 010 of the injection workpiece 001 is determined according to the structure of the product itself, and the present embodiment is not particularly limited, and the present embodiment is described by taking the example of molding the injection workpiece 001 having two axisymmetric undercut structures 010. The injection mold comprises a base plate 100, two square irons 200, a front mold (not shown), a rear mold 300 and a straight rod drive type sliding block mechanism 400, wherein the two square irons 200 are fixed on the same plate surface of the base plate 100, the rear mold 300 is fixedly connected with the two square irons 200, a space is reserved between the rear mold 300 and the base plate 100, and a space for the needle plate set 412 to run is defined. The front mold and the rear mold 300 are slidably matched through guide pillars and guide sleeves, and the front mold and the rear mold 300 can be switched between a mold opening state and a mold closing state. When the dies are closed, the straight bar-driven slider mechanism 400, the front die, and the rear die 300 together define a molding chamber for molding the injection-molded workpiece 001.

Referring to fig. 4-6, in the present embodiment, optionally, the straight-rod-driven sliding block mechanism 400 includes a jacking unit 410, two guiding members 420 and two sliding blocks 430 (only one sliding block 430 is shown in the figures), the two guiding members 420 and the two sliding blocks 430 are in one-to-one sliding fit, the jacking unit 410 can simultaneously drive the two sliding blocks 430 to slide relative to the guiding members 420, and the two sliding blocks 430 are respectively used for forming two inverted structures 010. In this embodiment, each guide 420 is matched with a corresponding one of the sliders 430, matching structures of the two guides 420 and the two sliders 430 are set to be the same, structures of the two guides 420 are the same, and structures of the two sliders 430 are the same.

Optionally, the jacking unit 410 includes a driver 411, a needle plate group 412, a thimble 413 and a push rod 414, the thimble 413 and the push rod 414 are both connected to the needle plate group 412, one end of the driver 411 is connected to the rear mold 300, the other end of the driver is connected to the needle plate group 412, the needle plate group 412 is located between the substrate 100 and the rear mold 300, and the driver 411 can drive the needle plate group 412 to move along the mold opening direction or the mold closing direction, so that the thimble 413 and the push rod 414 are driven to move together by the needle plate group 412. After the injection mold is opened, the needle plate group 412 can drive the ejector pins 413 to lift the injection molding workpiece 001, and can drive the slide block 430 to move through the ejector pins 414, so that the slide block 430 is pulled away from the reversing structure 010.

The driver 411 may be configured as an air cylinder or a hydraulic cylinder.

Referring to fig. 5-7, optionally, the needle plate group 412 includes a bottom plate 4121, a face plate 4122 and a lock cap 4123, the face plate 4122 and the bottom plate 4121 are stacked, the bottom plate 4121 is located between the face plate 4122 and the substrate 100, the driver 411 is connected to the rear mold 300 and the bottom plate 4121, and the bottom plate 4121 is attached to the surface of the substrate 100 in the mold clamping state. The bottom plate 4121 is provided with a mounting hole 41211 extending therethrough in the thickness direction of the bottom plate 4121, and the locking cap 4123 is fitted into the mounting hole 41211 and detachably connected to the bottom plate 4121. For example, the lock cap 4123 is fitted into the mounting hole 41211, and the lock cap 4123 can be fixed to the panel 4122 by a screw, thereby achieving detachable connection. The panel 4122 is provided with a first through hole 41221 and a second through hole 41222 which are communicated with each other, the first through hole 41221 and the second through hole 41222 are both cylindrical holes, the first through hole 41221 and the second through hole 41222 are coaxially arranged, the aperture of the first through hole 41221 is smaller than that of the second through hole 41222, an annular limiting surface 41223 perpendicular to the axis of the first through hole 41221 or the second through hole 41222 is formed at the communication position of the first through hole 41221 and the second through hole 41222, the second through hole 41222 is communicated with the mounting hole 41211, and the aperture of the second through hole 41222 is smaller than that of the mounting hole 41211.

Further, an elastic resetting member 440 is disposed in the second through hole 41222, the elastic resetting member 440 may be a spring or an elastic sheet, and one end of the elastic resetting member 440 abuts against the lock cap 4123, and the other end of the elastic resetting member 440 abuts against the top rod 414.

It should be noted that the number of the ejector pins 413 is set as required, the ejector pins 413 are all fixedly connected with the panel 4122, each ejector pin 413 is arranged perpendicular to the panel 4122, and each ejector pin 413 is slidably connected with the rear mold 300.

Referring to fig. 8, optionally, the top rod 414 includes a rod body 4141 and a limiting protrusion 4142 of an integrated structure, the limiting protrusion 4142 is annular, and the limiting protrusion 4142 is sleeved outside the rod body 4141 and is coaxially disposed with the rod body 4141. Further, the limiting protrusion 4142 is located at one end of the lever body 4141, and an end surface of the limiting protrusion 4142 and a corresponding end surface of the lever body 4141 are located in the same plane. One end of the lever body 4141, which is far away from the limiting protrusion 4142, passes through the first through hole 41221 from the mounting hole 41211 and after passing through the second through hole 41222, and the lever body 4141 is perpendicular to the bottom plate 4121 and the panel 4122. The elastic restoring member 440 is clamped between the locking cap 4123 and the restricting protrusion 4142. The limiting protrusion 4142 is slidably connected with the second through hole 41222, and the limiting protrusion 4142 has a first position and a second position switched with each other, when the injection mold is closed, the front mold presses the ejector rod 414, and the limiting protrusion 4142 is in the first position, at this time, the elastic reset piece 440 is compressed, and a distance D1 is provided between the limiting protrusion 4142 and the limiting surface 41223. When the injection mold is opened, the front mold cancels the pressing force on the top rod 414, the top rod 414 moves towards the front mold under the action of the elastic resetting piece 440, and the limit protrusion 4142 is switched to the second position, the limit protrusion 4142 is close to the front mold movement distance D1, and in this state, the limit protrusion 4142 is abutted against the limit surface 41223. That is, the limit protrusion 4142 and the limit surface 41223 are provided to ensure that the second position of the lift rod 414 is always kept unchanged after each mold opening.

Further, the rod body 4141 includes a first rod segment configured as a cylindrical rod and a second rod segment configured as a non-cylindrical rod, i.e., the first rod segment has a circular cross-sectional profile and the second rod segment has a non-circular cross-sectional profile, e.g., the second rod segment has a kidney-shaped cross-sectional profile in this embodiment. Wherein the cross section is a plane perpendicular to the axis of the lever body 4141. Specifically, the second rod section has first arc surface, first rectangle surface, second arc surface and the second rectangle surface of end to end connection in proper order, and first arc surface and second arc surface set up relatively, and first rectangle surface and second rectangle surface set up relatively. The first rectangular surface and the second rectangular surface are both provided with a first driving part 4143 and a guide groove 4144, the first driving part 4143 is arranged to be a driving groove, and the driving groove is communicated with the guide groove 4144. The first driving portion 4143 has a first groove side wall 41431 and a second groove side wall 41432 opposite to each other, the first groove side wall 41431 and the second groove side wall 41432 are parallel to each other and have an acute angle or an obtuse angle with the axis of the rod 4141, and one ends of the first groove side wall 41431 and the second groove side wall 41432 located on the same side extend onto the first arc surface, that is, one end of the driving groove is located on the first arc surface. The first groove side wall 41431 is closer to the restricting projection 4142 than the second groove side wall 41432. Two groove side walls of the guide groove 4144 are smoothly connected with the first groove side wall 41431 and the second groove side wall 41432, respectively, and a length direction of the guide groove 4144 extends in an axial direction of the lever body 4141.

It should be noted that, in other embodiments, the first driving portion 4143 may be provided only on the first groove side wall 41431 or the second groove side wall 41432, and the first driving portion 4143 may also be a protruding structure.

In this embodiment, optionally, two guide members 420 are provided, both of the guide members 420 are connected to the rear mold 300, and the slider 430 is clamped between the two guide members 420. Each guide member 420 is provided with a first guiding inclined surface 421, and both the first guiding inclined surfaces 421 are adapted to be attached to the sliding block 430 and slidably connected to the sliding block 430. Further, the guide member 420 is set as a bending plate, the guide member 420 includes a first plate body and a second plate body which are vertically disposed, the second plate body is connected with the rear mold 300, the first guiding inclined plane 421 is located on the second plate body, the first guiding inclined plane 421 is perpendicular to the surface of the first plate body, and the first guiding inclined plane 421 faces one side of the rear mold 300.

Optionally, the rear mold 300 is further provided with a spacer 500, the spacer 500 is provided with a second guiding inclined surface 510, the second guiding inclined surface 510 is opposite to the two first guiding inclined surfaces 421, a clamping space is formed between the second guiding inclined surface 510 and the two first guiding inclined surfaces 421, the slider 430 is arranged in the clamping space and clamped by the first guiding inclined surfaces 421 and the second guiding inclined surfaces 510, and the slider 430 is slidably connected with the second guiding inclined surface 510 and the two first guiding inclined surfaces 421.

Further, the second guiding inclined surface 510 is provided with a plurality of oil grooves 520, and the oil grooves 520 can store lubricating oil to reduce the friction between the slider 430 and the second guiding inclined surface 510.

Referring to fig. 5 and 9, in the present embodiment, optionally, the slider 430 includes a slider body 431 and two second driving portions 432 connected to each other. The slider body 431 is provided with a guide inclined surface and a forming part 4313 for forming the inverted buckle structure 010, the slider body 431 is provided with a limiting through hole 4311 and two assembling holes 4312 communicated with the limiting through hole 4311, the cross section profile of the limiting through hole 4311 is basically the same as that of the second rod section, the assembling holes 4312 are arranged to be stepped holes, and the two assembling holes 4312 are arranged on two opposite sides of the slider body 431 and are coaxially arranged. The second driving portion 432 is configured as a driving protrusion, and the second driving portion 432 is inserted into the corresponding fitting hole 4312 and is fixedly connected with the slider body 431 through a screw. Part of the second driving portion 432 extends into the limiting through hole 4311, and part of the second driving portion 432 extending into the limiting through hole 4311 can be slidably matched with the corresponding first driving portion 4143. Specifically, the second driving portion 432 includes an integrated mounting plate 4321 and a shifting block 4322, the shifting block 4322 is located on one plate surface of the mounting plate 4321, the shifting block 4322 extends into the limiting hole, and the mounting plate 4321 is fixedly connected with the slider body 431 through a screw. The shifting block 4322 has a first mating face 43221, a second guiding face 43224, a second mating face 43223 and a second guiding face 43224 which are sequentially connected end to end, the first mating face 43221 is parallel to the second mating face 43223, the first mating face 43221 is used for abutting against the first groove side wall 41431, and the second mating face 43223 is used for abutting against the second groove side wall 41432; the first guide face 43222 and the second guide face 43224 are parallel and contact with both groove side walls of the guide groove 4144, respectively.

It should be understood that when the first driving portion 4143 is provided as one, one second driving portion 432 may be provided on the slider body 431; and when the first driving part 4143 is provided as a protrusion structure, the second driving part 432 is provided as a groove fitting with the protrusion structure.

In this embodiment, the second rod segment of the top rod 414 is inserted into the limiting through hole 4311, the axis of the top rod 414 is consistent with the extending direction of the limiting through hole 4311, the first groove side wall 41431 and the second groove side wall 41432 on the second rod segment are both perpendicular to the first guiding inclined surface 421, and the guiding groove 4144 extends along the extending direction of the limiting through hole 4311. The first rectangular surface and the second rectangular surface of the second rod section are respectively contacted with two opposite plane hole walls of the limiting through hole 4311, the second rod section can slide in the limiting through hole 4311 along the extending direction of the limiting through hole 4311, when the first arc surface of the second rod section is contacted with one arc hole wall of the limiting through hole 4311, the second arc surface of the second rod section has a distance with the other arc hole wall of the limiting through hole 4311, and the distance is between the second arc surface of the second rod section and the other arc hole wall of the limiting through hole 4311When the sliding block 430 slides relative to the top rod 414, the second arc surface can contact with the arc hole wall of the limiting through hole 4311. That is, the second rod segment can slide along the extending direction of the limiting through hole 4311 relative to the limiting through hole 4311, and can also slide along the direction perpendicular to the extending direction of the limiting through hole 4311 relative to the limiting through hole 4311, and the second rod segment and the limiting through hole 4311 perform a compound motion. In a mold closing state, the shifting block 4322 is inserted into the driving groove, and the first mating surface 43221 and the second mating surface 43223 of the shifting block 4322 respectively have a distance from the first groove side wall 41431 to the second groove side wall 41432, and the distance D2 between the first mating surface 43221 and the first groove side wall 41431 is adapted to the distance D1, so that in a mold opening state, the top rod 414 can move upward by the elastic restoring member 440 to the second position, so as to compensate the distance D2 between the first groove side wall 41431 and the first mating surface 43221, and thus when the needle plate set 412 drives the top rod 414 and the top needle 413 to move, the product jacking and the demolding synchronization of the reversed structure 010 are realized. By setting the distance D2, the influence of manufacturing and assembling errors on the structural precision of the die can be effectively improved. First groove side wall 41431 is at an angle of, for example, 45 deg. to the horizontal, and correspondingly,

obviously, depending on the angle of the first groove side wall 41431 with respect to the horizontal plane, the relationship between D2 and D1 can be obtained according to the pythagorean theorem.

Optionally, the injection mold further includes a wear-resistant block 600, the wear-resistant block 600 is connected to the slider body 431, and in a mold closing state, the shovel base on the front mold abuts against the wear-resistant block 600 and tightly shovels the slider body 431 through the wear-resistant block 600.

The operation modes of the injection mold provided by the embodiment include, for example:

referring to fig. 6 and 7, in the mold clamping state, the base plate 4121 is attached to the substrate 100, and the actuator 411 is in an extended state. At this time, the front mold is pressed against the rear mold 300, the front mold simultaneously presses the ejector pin 414 and the slider 430, the front mold, and the rear mold 300 together define an injection molding chamber. Also, the dial 4322 is in the drive groove, and the dial 4322 has a spacing from the first and second groove sidewalls 41431 and 41432 of the drive groove. After the injection molding is completed, the mold is opened, in the state of opening the mold, the front mold cancels the pressing of the top rod 414 and the slide block 430, the top rod 414 is close to the front mold for a movement distance D2 under the action of the elastic resetting piece 440, the limiting protrusion 4142 on the top rod 414 is abutted against the limiting surface 41223 on the panel 4122, and meanwhile, the first matching surface 43221 and the first groove side wall 41431 are abutted against each other. Then, the driver 411 is shortened to drive the bottom plate 4121 and the panel 4122 to move close to the rear mold 300, the ejector rod 414 and the ejector pin 413 are driven by the bottom plate 4121 to move together, when the ejector rod 414 moves, the first groove side wall 41431 applies force F to the shifting block 4322, so that the shifting block 4322 has a tendency of moving along the force application direction of the external force F, the force application direction of the external force F is perpendicular to the first groove side wall 41431, because the first groove side wall 41431 is parallel to the first guiding inclined surface 421, the direction of the obtained external force F is parallel to the first guiding inclined surface 421, so that the slider 430 can be driven to slide along the first guiding inclined surface 421, and simultaneously, the product is jacked up by matching with the ejector pin 413, and finally the forming part 4313 on the slider 430 moves along the S direction relative to the product, so that the forming part 4313 is separated from the back-off structure 010 of the product; when the forming portion 4313 is separated from the reversing structure 010, the shifting block 4322 leaves the driving groove and enters the guiding groove 4144, and at this time, the top rod 414 and the top pin 413 are driven by the bottom plate 4121 to continue to move close to the front mold, so that the product is lifted up, and in this process, the top rod 414 does not drive the sliding block 430 to continue to slide relative to the first guiding inclined surface 421. After the product is demolded, the front mold is reset under the action of the press, the front mold is close to the rear mold 300 and can drive the bottom plate 4121 and the panel 4122 to reset through the ejector rod 414, in the process, the sliding block 430 slides relative to the first guide inclined plane 421 along the direction opposite to the moving direction during demolding, finally, the shifting block 4322 returns to the driving groove, and the mold closing is completed. And the shovel base on the front mould presses the wear-resisting block 600 on the sliding block 430, so that the sliding block 430 and the first guide inclined plane 421 keep a static state, the defects of burrs and the like are not easy to occur during injection molding, and the injection molding quality is high.

The injection mold provided by the embodiment has the advantages of simple and reasonable structure and low manufacturing cost; the product ejection and the back-off demoulding are carried out synchronously, so that the demoulding time is shortened, the efficiency is improved, and the cost is reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a straight rod drive formula slider mechanism for the shaping has injection moulding work piece (001) of back-off structure (010), its characterized in that includes:

the injection molding machine comprises a jacking unit (410), wherein the jacking unit (410) comprises a needle plate group (412), a thimble (413) and a mandril (414), the thimble (413) and the mandril (414) are both connected with the needle plate group (412), and the thimble (413) is used for jacking an injection molding workpiece (001); the ejector rod (414) is provided with a first driving part (4143);

a guide member (420), wherein the guide member (420) is provided with a first guide inclined surface (421) which forms an acute angle or an obtuse angle with the mold opening and closing direction;

the sliding block (430) is connected with the first guide inclined surface (421) in a sliding mode, the sliding block (430) is provided with a second driving portion (432) and a forming portion (4313) used for forming an inverted buckle structure (010) of the injection molding workpiece (001), the ejector rod (414) is connected with the sliding block (430) in a sliding mode, and the first driving portion (4143) is used for being abutted against the second driving portion (432);

the needle plate group (412) is used for driving the ejector pin (413) and the ejector rod (414) to move along a mold opening direction, so that the ejector pin (413) can lift the injection molding workpiece (001) and the second driving portion (432) can drive the sliding block (430) to slide relative to the first guide inclined surface (421) under the driving of the first driving portion (4143), and the forming portion (4313) is pulled away from the reversing structure (010).

2. The straight rod driven slider mechanism of claim 1, wherein:

the first driving portion (4143) is configured as a driving groove having a groove sidewall disposed at an angle to the first guiding ramp (421); the second drive portion (432) is provided as a drive projection which is slidably connected with the groove side wall.

3. The straight rod driven slider mechanism of claim 2, wherein:

the ejector rod (414) is also provided with a guide groove (4144) communicated with the driving groove, and the guide groove (4144) extends along the axial extension direction of the ejector rod (414); the driving protrusion is provided with a first driving surface and a second driving surface which are connected and arranged at an acute angle or an obtuse angle, and the first driving surface is used for being in sliding connection with the groove side wall; the second driving surface is used for being connected with the groove wall of the guide groove (4144) in a sliding mode; the slider (430) remains stationary with the first guiding ramp (421) as the driving protrusion slides off the driving groove and slides within the guiding groove (4144).

4. The straight rod driven slider mechanism of claim 3, wherein:

the groove side wall and the first guide slope (421) are perpendicular to each other.

5. The straight rod driven slider mechanism of claim 2, wherein:

the sliding block (430) comprises a sliding block body (431), a limiting through hole (4311) and an assembling hole (4312) communicated with the limiting through hole (4311) are arranged on the sliding block body (431), and the driving protrusion penetrates through the assembling hole (4312) and extends into the limiting through hole (4311); the ejector rod (414) penetrates through the limiting through hole (4311), the ejector rod (414) and the limiting through hole (4311) are connected in a sliding mode in the axial line extending direction of the limiting through hole (4311), and the ejector rod (414) and the limiting through hole (4311) have a distance in the direction perpendicular to the axial line of the limiting through hole (4311).

6. The straight rod driven slider mechanism of claim 1, wherein:

the ejector rod (414) is connected with the needle plate group (412) in a sliding mode along the axial extension direction of the ejector rod (414) so that the ejector rod (414) has a first position in a mold closing state and a second position in a mold opening state, and the first driving part (4143) and the second driving part (432) have a distance in the first position; when the first driving part (4143) is at the second position, the first driving part (432) is abutted against the second driving part; an elastic resetting piece (440) is arranged on the needle plate group (412), and the elastic resetting piece (440) is abutted against the ejector rod (414) and used for enabling the ejector rod (414) to have a trend of moving from the first position to the second position.

7. The straight rod driven slider mechanism of claim 6, wherein:

the needle plate group (412) comprises a panel (4122) and a bottom plate (4121) which are connected, the panel (4122) is provided with a first through hole (41221) and a second through hole (41222) which are communicated, the aperture of the first through hole (41221) is smaller than that of the second through hole (41222), and a limiting surface (41223) is formed at the communication position of the first through hole (41221) and the second through hole (41222); the ejector rod (414) comprises a rod body (4141) and a limiting protrusion (4142) which are connected, the rod body (4141) penetrates through the first through hole (41221) and the second through hole (41222) at the same time, and when the ejector rod (414) is located at the second position, the limiting protrusion (4142) is abutted against the limiting surface (41223); the elastic resetting piece (440) is arranged between the bottom plate (4121) and the ejector rod (414).

8. The straight rod driven slider mechanism of claim 1, wherein:

the straight rod driving type sliding block mechanism (400) further comprises a cushion block (500), and a second guide inclined surface (510) parallel to the first guide inclined surface (421) is arranged on the cushion block (500).

9. The straight rod driven slider mechanism of claim 8, wherein:

an oil groove (520) is arranged on the second guide inclined surface (510).

10. An injection mold, comprising:

the straight rod driven slider mechanism (400) of any of claims 1-9.

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