CN117227109A - Injection mold demoulding mechanism and injection mold - Google Patents

Abstract

The application provides an injection mold demoulding mechanism and an injection mold, and relates to the field of mold design, wherein the injection mold demoulding mechanism comprises a shovel base, a yielding slide block, an inclined ejector block and an ejector pin assembly, and the yielding slide block is slidably connected with the shovel base in a first direction; the abdication sliding block is slidably connected with the inclined top block in the second direction; the inclined ejector block is connected with the ejector pin assembly; the yielding slide block is provided with a first position and a second position which are mutually switched, and when the yielding slide block is positioned at the first position, the yielding slide block and the surface of the inclined ejection block, which are used for forming the forming cavity of the forming concave part, have a distance so that the yielding slide block and the inclined ejection block can move together towards the demoulding direction under the action of the thimble assembly; when the movable block is in the second position, the abdication sliding block and the inclined top block are matched together to participate in forming the forming cavity of the forming concave part. The demolding is convenient, and the plastic part is not easy to damage.

Description

Injection mold demoulding mechanism and injection mold

Technical Field

The application relates to the field of mold design, in particular to an injection mold demolding mechanism and an injection mold.

Background

In the field of mold design, when a hole, a concave cavity or a boss is formed on the outer side of a molded part which is formed by injection and is different from the mold opening and closing direction, the molded part cannot be ejected and demolded directly by an ejection mechanism such as a thimble, at the moment, a slide block which is formed on the mold must be a movable core which can move laterally, so that before the molded part is demolded and ejected, the laterally formed slide block is pulled out, and then the molded part is ejected from the mold, otherwise, the molded part cannot be demolded, and a product is damaged. The whole mechanism for driving the lateral forming part to perform lateral parting core pulling is called a sliding block core pulling mechanism. The pitched roof is a mechanism used for forming barbs of a product in a mold design, and when the inner side or the outer side of the wall surface of the product is inverted, the pitched roof is often a very effective method. During ejection, the oblique ejection is opposite to the product and simultaneously moves transversely, so that the product is separated. General oblique top theory of operation: in the past, the oblique top is pushed forward obliquely along a certain angle, and after a previous stroke, the oblique top transversely moves relative to the product, so that the product is separated, the position of the product buckle is separated from the contact of the inner side of the plastic, and the product can be taken out smoothly.

The inventor researches show that the existing injection mold demoulding mechanism has the following defects:

the action is single, only can carry out the drawing of patterns to regular back-off structure, and accommodation is little.

Disclosure of Invention

The application aims to provide an injection mold demoulding mechanism and an injection mold, which can adapt to demoulding of a complex back-off structure, have wide application range, are convenient and reliable to demould and are not easy to damage plastic parts.

Embodiments of the present application are implemented as follows:

in a first aspect, the application provides an injection mold demolding mechanism, which is used for demolding an injection molding piece and provided with an inner concave part with an opening, wherein the inner concave part is provided with a first wall surface and a second wall surface which are opposite, the first wall surface and the second wall surface are obliquely arranged, and the distance between one side of the first wall surface and one side of the second wall surface, which are close to the opening, is smaller than the distance between one side of the first wall surface and one side of the second wall surface, which are far away from the opening; comprising the following steps:

the shovel base, the abdication sliding block, the inclined ejector block and the ejector pin assembly are used for being connected with the movable mold core, the abdication sliding block is slidably connected with the shovel base in a first direction with an included angle with the mold opening and closing direction, and the shovel base and the inclined ejector block are relatively fixed in the mold opening and closing direction; the yielding slide block is slidably connected with the inclined top block in a second direction with an included angle with the first direction; the inclined ejector block is connected with the ejector pin assembly;

the yielding slide block is provided with a first position and a second position which are mutually switched, and when the yielding slide block is positioned at the first position, the yielding slide block and the inclined top block are used for forming the surface of the forming cavity for forming the concave part, and have a distance, so that the yielding slide block and the inclined top block can move together towards the demoulding direction under the action of the thimble assembly; when the concave-shaped groove is positioned at the second position, the yielding slide block and the inclined top block are matched together to participate in forming a forming cavity for forming the concave part.

In an alternative embodiment, a first sliding part is arranged on the shovel base, a second sliding part is arranged on the yielding slide block, one of the first sliding part and the second sliding part is a sliding chute, and the other is a bulge; the first sliding portion and the second sliding portion are slidably connected in the first direction.

In an alternative embodiment, the cross-sectional profile of the first and second sliding portions is dovetail or "T" shaped.

In an optional embodiment, the yielding slide block is provided with a first limiting part, the inclined top block is provided with a second limiting part, and the first limiting part and the second limiting part are used for being abutted when the yielding slide block is in the first position, so that the inclined top block can drive the yielding slide block to synchronously move towards the demolding direction.

In an alternative embodiment, the first limiting part is set as a chute, the second limiting part is set as a limiting rod, a part of the limiting rod is inserted into the chute, and when the yielding slide block is in the first position, the limiting rod can be abutted with the wall of the chute.

In an alternative embodiment, the chute is provided with a first chute wall and a second chute wall which are arranged at intervals in the second direction, and the second chute wall is positioned at one side of the first chute wall close to the shovel base; when the limiting rod is positioned at the first position, the limiting rod is in butt joint with the first groove wall, and when the limiting rod is positioned at the second position, the limiting rod is in butt joint with the second groove wall.

In an alternative embodiment, the injection mold stripping mechanism further includes an elastic member connected to both the inclined top block and the yielding slide block, such that the yielding slide block has a tendency to move from the second position to the first position.

In an alternative embodiment, the elastic element is provided as a spring, a leaf spring or a rubber element; the anti-tilting device is characterized in that the yielding slide block is provided with a containing hole, the elastic piece is inserted into the containing hole, one end of the elastic piece is connected with the bottom wall of the containing hole, and the other end of the elastic piece is abutted to the inclined top block.

In an alternative embodiment, the thimble assembly comprises a thimble bottom plate, a thimble panel, an inclined thimble seat, an inclined guide rod and an inclined thimble rod, wherein the thimble bottom plate is connected with the thimble panel, and the inclined thimble seat is slidably connected with the thimble panel in the demolding direction; the inclined guide rod is arranged in the inclined top seat in a penetrating way and is connected with the inclined top seat in a sliding way, and the inclined guide rod is used for being fixed on a fixed die bottom plate of the die; one end of the inclined ejector rod is fixedly connected with the inclined ejector seat, and the other end of the inclined ejector rod is connected with the inclined ejector block.

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

the injection mold release mechanism according to any one of the preceding embodiments.

The embodiment of the application has the beneficial effects that:

in summary, the demolding mechanism for the injection mold provided by the embodiment can demold the concave portions with inconsistent inner cavity sizes on the plastic part. Specifically, after the die is assembled, the abdication sliding block is matched with the inclined top block, and meanwhile, the injection cavity is defined by combining the fixed die core and the movable die core. The partial surface of the abdication sliding block and the partial surface of the inclined top block are used for forming the inner wall surface of the concave part. After injection molding is completed, the mold opening action is carried out, the movable mold core is driven by the movable mold plate to be far away from the fixed mold core along the mold opening direction, in the process, the shovel base moves along with the movable mold core, and under the driving of the shovel base, the abdicating slide block moves along the first direction along with the shovel base and simultaneously moves along the second direction relative to the inclined jacking block. It can be understood that the second direction is the closing and moving direction of the opening and closing die direction and the first direction, namely, the yielding slide block can slide relative to the shovel base and the inclined top block at the same time, the yielding slide block is firstly demoulded from the plastic part, the distance between the yielding slide block and the structure formed by the inclined top block in the opening and closing die direction is not greater than the distance between the first wall surface of the concave part and one side of the second wall surface, close to the opening, of the inner concave part, then, under the action of the thimble assembly, the inclined top block and the yielding slide block are driven to move together in the demoulding direction, and the inclined top block and the yielding slide block can also be separated from the inner concave part in the process of propping the plastic part from the fixed die core, so that the demoulding of the plastic part is finally realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a plastic part according to an embodiment of the present application;

FIG. 2 is a schematic view (mold-closing state) of the injection mold release mechanism and the mold according to the embodiment of the present application;

FIG. 3 is a schematic view of a demolding mechanism of an injection mold according to an embodiment of the present application;

fig. 4 is a schematic diagram of a structure for demolding a yielding slide block of an injection mold demolding mechanism according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a demolding mechanism for an injection mold according to an embodiment of the present application;

FIG. 6 is a schematic view of a shovel base according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a structure of the cooperation of the inclined ejector block and the yielding slider according to an embodiment of the present application;

FIG. 8 is a schematic view of a yielding slider according to an embodiment of the present application;

FIG. 9 is a schematic view of another view of a yielding slider according to an embodiment of the present application;

FIG. 10 is a schematic view of a part of an injection mold according to an embodiment of the present application;

FIG. 11 is a schematic view of a portion of a mating molding of an injection mold according to an embodiment of the present application;

fig. 12 is a schematic view of a part of a hidden plastic part of an injection mold according to an embodiment of the application.

Icon:

001-plastic part; 011-an inner recess; 012-opening; 013-a first wall; 014—a second wall surface; 100-shovel base; 110-a guide ramp; 120-a first slide; 200-yielding a slider; 201-a first side; 202-a second side; 210-a second slide; 220-a first limit part; 221-a first groove wall; 222-second groove wall; 230-accommodating holes; 300-inclined top block; 301-a third side; 302-fourth side; 303-fifth side; 310-a second limit part; 320-limit grooves; 400-thimble assembly; 410-thimble bottom plate; 420-thimble panel; 421-bar-shaped holes; 430-inclined footstock; 440-inclined guide rod; 450-inclined ejector rod; 500-auxiliary demolding top block; 600-fixed template; 700-fixing the mold core; 800-elastic member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application 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 application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its 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 application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

At present, the side core pulling slide block mechanism can only carry out demolding to the position of the regular groove or hole on the plastic part 001, and when the notch width of the groove is smaller than the width of the groove depth or the aperture opening of the hole is smaller than the opening of Kong Shen, the slide block cannot smoothly enter and exit the opening 012, so that demolding fails or the plastic part 001 is damaged.

In view of this, a designer has devised an injection mold stripping mechanism capable of stripping a portion of a groove of a molding 001 having a groove width smaller than a groove depth, and also capable of stripping a portion of a hole of the molding 001 having an aperture opening smaller than an opening of Kong Shen.

Referring to fig. 1, 2 in conjunction with fig. 9, the grooves or holes may also be referred to as dimples 011. The mouth of the groove and the mouth of the hole may be referred to as the opening 012 of the recess 011. For example, in this embodiment, a molded article 001 having a substantially square cross-sectional profile of the concave portion 011 will be described as an example. The concave portion 011 has a first wall 013 and a second wall 014 which are disposed opposite and inclined, the distance between the sides of the first wall 013 and the second wall 014 close to the opening 012 is D1, the distance between the sides of the first wall 013 and the second wall 014 remote from the opening 012 is D2, D1 is smaller than D2, and the distance between the first wall 013 and the second wall 014 gradually decreases from D2 to D1, that is, the distance between the first wall 013 and the second wall 014 is gradually changed, it is understood that the first wall 013 of the molding 001 is located above the second wall 014 and is disposed substantially horizontally after the molding 001 is completed.

Referring to fig. 2 and 3, in the present embodiment, the demolding mechanism of the injection mold includes a shovel base 100, a yielding slider 200, an inclined ejector 300 and an ejector pin assembly 400. The shovel base 100 is used for being fixedly connected with the movable mold core through fasteners such as bolts. The abdication slide block 200 is slidably connected with the shovel base 100 in a first direction with an included angle with the mold opening and closing direction, and the abdication slide block 200 and the shovel base are relatively fixed in the mold opening and closing direction; the abdication slider 200 is slidably connected with the inclined top block 300 in a second direction having an included angle with the first direction; the inclined ejector 300 is connected to the ejector pin assembly 400.

Wherein, the yielding slider 200 has a first position and a second position that are switched with each other, when in the first position, the yielding slider 200 and the surface of the inclined top block 300 used for forming the forming cavity of the forming concave portion 011 have a distance, so that the yielding slider 200 and the inclined top block 300 can move together towards the demolding direction under the action of the ejector pin assembly 400; in the second position, the yielding slide 200 cooperates with the angled jack 300 to participate in the molding cavity forming the molding recess 011.

The working principle of the injection mold demolding mechanism provided by the embodiment is as follows:

referring to fig. 2-5, in fig. 3, a indicates a mold opening and closing direction, B indicates a first direction, C indicates a second direction, and when the mold is opened, the shovel base 100 moves upward. After the die is assembled, the abdication sliding block 200 is in the second position under the guidance of the shovel base 100, the abdication sliding block 200 is matched with the inclined top block 300, and meanwhile, the injection cavity is defined by combining the fixed die core 700 and the movable die core. A part of the surface of the relief slider 200 and a part of the surface of the sloped roof block 300 are used to mold the inner wall surface of the concave portion 011. After the injection molding of the plastic part 001 is completed, the movable mold plate is driven by a press machine or the like to move so as to perform mold opening, the movable mold core is driven by the movable mold plate to move away from the fixed mold core 700 along the mold opening direction, in this process, the shovel base 100 moves along with the movable mold core, and the abdication slide block 200 moves along the first direction along with the shovel base 100 and also moves along the second direction relative to the inclined ejector block 300 under the driving of the shovel base 100. It can be understood that the second direction is a mold opening and closing direction and a first direction is a mold closing direction, that is, the abdication slider 200 can slide relative to the shovel base 100 and the pitched roof block 300 at the same time under the driving of the shovel base 100, the abdication slider 200 is firstly demoulded from the plastic part 001, and the maximum distance D3 of the part, in the mold opening and closing direction, of the structure formed by the abdication slider 200 and the pitched roof block 300, inserted into the concave portion 011 is not greater than the distance D1 between the first wall 013 and one side, close to the opening 012, of the second wall 014. In this way, the yielding slider 200 and the inclined ejector 300 can be smoothly demolded through the opening 012, that is, under the action of the ejector pin assembly 400, the inclined ejector 300 and the yielding slider 200 are driven to move together in the demolding direction, and the inclined ejector 300 and the yielding slider 200 can also penetrate through the opening 012 to release the concave portion 011 in the process of ejecting the plastic part 001 from the fixed mold core 700, so that the inclined ejector 300 is separated from the plastic part 001, and finally the demolding of the plastic part 001 is realized.

Referring to fig. 6, in the embodiment, optionally, the shovel base 100 has a guiding inclined plane 110, the guiding inclined plane 110 is provided with a first sliding portion 120, the first sliding portion 120 is a bar-shaped protrusion, and a cross-street profile of the first sliding portion 120 is a dovetail shape or a "T" shape, wherein the cross-street surface is a plane perpendicular to the length direction of the first sliding portion 120.

When the shovel base 100 is assembled to the movable mold core by a fastener such as a bolt, the guide inclined surface 110 forms an angle with the mold opening and closing direction, and the inclination direction of the guide inclined surface 110 is consistent with the first direction.

Referring to fig. 7 to 9, in this embodiment, optionally, the yielding slider 200 is provided with a second sliding portion 210 and a first limiting portion 220. The second sliding portion 210 may make the slider 200 a split structure, so that the two may be made of different materials, thereby reducing the cost. The second slider 210 may be fixed to the relief slider 200 by a fastener such as a screw. Meanwhile, the second sliding portion 210 is provided with a groove having a dovetail-shaped or T-shaped cross-sectional profile, and the first sliding portion 120 and the second sliding portion 210 are slidably coupled, so that the cross-sectional shapes of the first sliding portion 120 and the second sliding portion 210 are substantially the same. It should be noted that the second sliding portion 210 may also be a groove directly provided on the yielding slider 200. Furthermore, in other embodiments, the first sliding portion 120 may be a groove, and the second sliding portion 210 may be a protrusion.

The first limiting portion 220 is configured as a chute, the first limiting portion 220 is a bar-shaped slot, the first limiting portion 220 extends along the second direction, the first limiting portion 220 has a first slot wall 221 and a second slot wall 222 in the second direction, and the second slot wall 222 is located at a side of the first slot wall 221 close to the shovel base 100.

Further, the accommodating hole 230 is further provided on the yielding slider 200, the accommodating hole 230 is a blind hole, the accommodating hole 230 is internally provided with the elastic member 800, one end of the elastic member 800 is abutted on the bottom wall of the accommodating hole 230, and when the elastic member 800 is in a natural state, the end of the elastic member 800 far away from the bottom wall of the accommodating hole 230 can extend out of the orifice of the accommodating hole 230.

Further, the surface of the abdication block 200 has a first side 201 for forming a molding cavity and a second side 202 capable of being attached to the pitched roof block 300, the first side 201 and the second side 202 are parallel, and when the abdication block 200 is assembled with the shovel base 100, the first side 201 and the second side 202 on the abdication block 200 are disposed obliquely to the horizontal plane, and the oblique direction is consistent with the second direction.

Referring to fig. 3, an auxiliary demolding top block 500 is disposed on the second side 202, and a portion of the auxiliary demolding top block 500 is embedded in the second side 202, and a portion of the auxiliary demolding top block is protruding from the second side 202, and a portion of the auxiliary demolding top block protruding from the second side 202 is in a triangular prism structure that is horizontally arranged.

In this embodiment, optionally, the pitched roof block 300 has a third side 301, a fourth side 302, and a fifth side 303 connected in sequence, where the third side 301 and the fourth side 302 are used to form a molding cavity for molding the plastic part 001. The fifth side 303 is adapted to slidably contact the second side 202. The inclined top block 300 is further provided with a second limiting part 310, the second limiting part 310 is a limiting rod, the limiting rod can be connected to the inclined top block 300 in a threaded mode, part of the limiting rod can be inserted into the sliding groove, and the limiting rod can slide back and forth in the sliding groove along the second direction. The stop lever abuts against the first groove wall 221 when the yielding slider 200 is in the first position, and abuts against the second groove wall 222 when the yielding slider 200 is in the second position. In this way, the yielding slider 200 can be stabilized at the first position or the second position by the cooperation of the limit lever and the chute.

Further, two limiting grooves 320 are provided on the fifth side 303 of the inclined top block 300, and when the yielding slider 200 is at the first position, the auxiliary demolding top block 500 is clamped with one of the limiting grooves 320; when the yielding slide block 200 is in the second position, the auxiliary demolding top block 500 is clamped with the other limiting groove 320 of the two limiting grooves 320. Further promote the stability of slider 200 of stepping down in first position and second position department, the relative position of slider 200 is stepped down to the top to one side 300 and is difficult for changing when drawing of patterns, and when slider 200 is in first position to stepping down, the top to one side 300 can drive slider 200 of stepping down through supplementary drawing of patterns ejector block 500 when the slant motion under the drive of thimble mechanism to the messenger drawing of patterns is more smooth.

When the yielding slide block 200 is in the second position, the yielding slide block 200 and the inclined top block 300 are engaged to form the molding cavity in the mold closing state. The end of the elastic piece 800 on the yielding slide block 200 extending out of the accommodating hole 230 is abutted against the inclined top block 300, and the elastic piece 800 enables the yielding slide block 200 to have a trend of moving from the second position to the first position, so that the yielding slide block 200 is assisted to be demolded. That is, in the process of opening the mold, under the driving of the shovel base 100, the yielding slider 200 moves along the first direction and the second direction at the same time and needs to be separated from the plastic part 001, and the elastic force of the elastic member 800 exactly corresponds to the demolding direction of the yielding slider 200, so that the yielding slider 200 is convenient to slide relative to the inclined top block 300.

It should be appreciated that in other embodiments, guide holes may be provided on the pitched roof block 300, and the yielding slider 200 may be slidably disposed in the guide holes, so that the yielding slider 200 may be more compactly engaged with the pitched roof block 300.

In this embodiment, it should be noted that, when the yielding slider 200 is in the second position, the distance between the side of the second side 202 away from the shovel base 100 and the side of the third side 301 away from the shovel base 100 is substantially equal to D2 and greater than D1, and the yielding slider 200 and the pitched roof block 300 are blocked by the opening 012 and cannot be separated from the plastic part 001, even if the plastic part 001 is broken, resulting in product rejection. Therefore, before the inclined top block 300 and the yielding slide block 200 are demolded, the shovel base 100 is utilized to drive the yielding slide block 200 to demold along the second direction, in this process, the ejector pin assembly 400 is not started, the inclined top block 300 does not act, and only the yielding slide block 200 moves along the second direction for a set distance, which is determined by the first limiting portion 220 and the second limiting portion 310, that is, when the yielding slide block 200 moves from the second position to the first position, the first limiting portion 220 just abuts against the second limiting portion 310. At this time, the mold opening is completed, the movement of the shovel base 100 is stopped, and the maximum distance D3 of the portion of the structure formed by the yielding slider 200 and the pitched roof block 300 located in the concave portion 011 is less than or equal to D1, where the maximum distance is the vertical distance between the side of the second side 202 of the yielding slider 200 away from the shovel base 100 and the third side 301, and the yielding slider 200 and the pitched roof block 300 can be smoothly demolded through the opening 012. Specifically, the ejector pin assembly 400 is started to drive the inclined ejector block 300 to move obliquely, the inclined ejector block 300 drives the abdication slide block 200 to move obliquely synchronously through the auxiliary demolding ejector block 500, and the abdication slide block 200 and the inclined ejector block 300 move along the horizontal direction to be separated from the inner concave portion 011 in the process of jacking the plastic part 001 until demolding is completed.

Referring to fig. 9-12, in this embodiment, optionally, a thimble assembly 400 includes a thimble bottom plate 410, a thimble panel 420, an inclined thimble seat 430, an inclined guide rod 440, and an inclined thimble 450. The ejector pin bottom plate 410 is connected with the fixed die plate 600 through a guide sleeve. The thimble panel 420 is disposed on the thimble bottom plate 410, and the thimble panel 420 can be driven by the thimble panel 420 to rise or fall. The ejector plate 420 is provided with a bar hole 421 extending in the demolding direction, the inclined ejector 430 is embedded in the bar hole 421 and slidably connected with the ejector plate 420 in the demolding direction, and meanwhile, the inclined ejector 430 and the ejector plate 420 are relatively fixed in the mold opening and closing direction. For example, the angled jack 430 and the bar aperture 421 may mate by a dovetail or T-shaped configuration. The inclined guide rod 440 is inserted into the inclined top seat 430 and slidably connected with the inclined top seat, and the inclined guide rod 440 is fixed on the bottom plate of the fixed mold. One end of the inclined ejector rod 450 is fixedly connected with the inclined ejector seat 430, and the other end of the inclined ejector rod 450 is connected with the inclined ejector block 300. After the die is opened, the shovel base 100 drives the yielding slide block 200 to move to a first position, then, the thimble bottom plate 410 is jacked by the telescopic cylinder, so that the thimble bottom plate 410 is far away from the fixed die plate 600, the thimble bottom plate 410 drives the thimble panel 420, the inclined jacking seat 430 and the inclined jacking rod 450 to ascend, the inclined jacking seat 430 drives the inclined jacking rod 450 to move along the demoulding direction under the guidance of the inclined guide rod 440, and the inclined jacking rod 450 drives the inclined jacking block 300 and the yielding slide block 200 to separate from the plastic part 001 in the process of jacking the plastic part 001, so that the demoulding is realized.

According to the injection mold demolding mechanism, demolding operation of the concave portion 011 of the plastic part 001 can be achieved through demolding in steps, plastic is not easy to damage after demolding, the yield of products is improved, and cost is reduced.

The embodiment also provides an injection mold, which comprises the injection mold demolding mechanism mentioned in the embodiment, and further comprises a fixed mold plate 600, a fixed mold core 700, a movable mold plate, a movable mold core and other parts, wherein the fixed mold core 700 is fixed on the fixed mold plate 600, the movable mold core is fixed on the movable mold plate, and the fixed mold plate 600 and the movable mold plate are slidably connected through a guide post and a guide sleeve. The movable mold plate can move relative to the fixed mold core 700 under the drive of a power mechanism such as a press machine and the like so as to realize the mold opening and closing action.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An injection mold demolding mechanism for demolding an injection molding (001) having an inner concave portion (011) of an opening (012), the inner concave portion (011) having a first wall surface (013) and a second wall surface (014) opposite to each other, the first wall surface (013) and the second wall surface (014) being disposed obliquely, a distance between one side of the two adjacent to the opening (012) being smaller than a distance between one side of the two remote from the opening (012); characterized by comprising the following steps:

the automatic die comprises a shovel base (100), a yielding slide block (200), an inclined ejection block (300) and a thimble assembly (400) which are connected with a movable die core, wherein the yielding slide block (200) is slidably connected with the shovel base (100) in a first direction with an included angle with a die opening and closing direction, and the shovel base and the yielding slide block are relatively fixed in the die opening and closing direction; the yielding slider (200) is slidably connected with the pitched roof block (300) in a second direction with an included angle with the first direction; the inclined ejector block (300) is connected with the ejector pin assembly (400);

the yielding slider (200) is provided with a first position and a second position which are mutually switched, when the yielding slider is positioned at the first position, the yielding slider (200) and the inclined top block (300) are used for forming a forming cavity for forming the concave part (011) with a space, so that the yielding slider (200) and the inclined top block (300) can move together towards the demoulding direction under the action of the thimble assembly (400); when in the second position, the yielding slider (200) and the inclined top block (300) are matched together to participate in forming a forming cavity for forming the concave part (011).

2. The injection mold release mechanism of claim 1, wherein:

the shovel base (100) is provided with a first sliding part (120), the abdication sliding block (200) is provided with a second sliding part (210), one of the first sliding part (120) and the second sliding part (210) is a sliding chute, and the other is a bulge; the first sliding portion (120) and the second sliding portion (210) are slidably connected in the first direction.

3. The injection mold release mechanism according to claim 2, wherein:

the first sliding portion (120) and the second sliding portion (210) have a dovetail or "T" shaped cross-sectional profile.

4. The injection mold release mechanism of claim 1, wherein:

be provided with first spacing portion (220) on slider (200) of stepping down, be provided with second spacing portion (310) on oblique top piece (300), first spacing portion (220) with second spacing portion (310) are used for when slider (200) of stepping down is in the first position butt, so that oblique top piece (300) can drive slider (200) of stepping down is synchronous towards the drawing of patterns direction motion.

5. The injection mold release mechanism of claim 4, wherein:

the first limiting part (220) is arranged as a chute, the second limiting part (310) is arranged as a limiting rod, a part of the limiting rod is inserted into the chute, and when the yielding slide block (200) is positioned at the first position, the limiting rod can be abutted with the wall of the chute.

6. The injection mold release mechanism of claim 5, wherein:

the sliding chute is provided with a first groove wall (221) and a second groove wall (222) which are arranged at intervals in the second direction, and the second groove wall (222) is positioned at one side of the first groove wall (221) close to the shovel base (100); when in the first position, the limit rod is abutted with the first groove wall (221), and when in the second position, the limit rod is abutted with the second groove wall (222).

7. The injection mold release mechanism of claim 5, wherein:

the injection mold demolding mechanism further comprises an elastic piece (800), wherein the elastic piece (800) is simultaneously connected to the inclined top block (300) and the yielding slide block (200), so that the yielding slide block (200) has a tendency to move from the second position to the first position.

8. The injection mold release mechanism of claim 7, wherein:

the elastic piece (800) is a spring, a shrapnel or a rubber piece; the yielding slider (200) is provided with a containing hole (230), the elastic piece (800) is inserted into the containing hole (230), one end of the elastic piece (800) is connected with the bottom wall of the containing hole (230), and the other end of the elastic piece is abutted to the inclined top block (300).

9. The injection mold release mechanism of claim 1, wherein:

the thimble assembly (400) comprises a thimble bottom plate (410), a thimble panel (420), an inclined ejection seat (430), an inclined guide rod (440) and an inclined ejection rod (450), wherein the thimble bottom plate (410) is connected with the thimble panel (420), and the inclined ejection seat (430) is slidably connected with the thimble panel (420) in the demolding direction; the inclined guide rod (440) is arranged in the inclined top seat (430) in a penetrating way and is connected with the inclined top seat in a sliding way, and the inclined guide rod (440) is used for being fixed on a fixed die bottom plate of the die; one end of the inclined jacking rod (450) is fixedly connected with the inclined jacking seat (430), and the other end of the inclined jacking rod (450) is connected with the inclined jacking block (300).

10. An injection mold, comprising:

the injection mold release mechanism of any one of claims 1-9.