CN211763196U - Small-space split type reverse buckling shrinkage mechanism of precise plastic mold - Google Patents
Small-space split type reverse buckling shrinkage mechanism of precise plastic mold Download PDFInfo
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- CN211763196U CN211763196U CN201922394398.2U CN201922394398U CN211763196U CN 211763196 U CN211763196 U CN 211763196U CN 201922394398 U CN201922394398 U CN 201922394398U CN 211763196 U CN211763196 U CN 211763196U
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- shovel base
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Abstract
The utility model discloses a split type back-off of accurate plastic mould contracts with honour mechanism in little space, it includes a central shovel base, three peripheral shovel bases, three first tapered wedge type sliders and three second tapered wedge type sliders. The first wedge-type sliding blocks and the second wedge-type sliding blocks are alternately wound around the periphery of the central shovel base at intervals. The inner side surfaces of the first wedge type sliding blocks and the outer side surface of the central shovel base are provided with sliding clamping structures, and the central shovel base moves to synchronously drive the three first wedge type sliding blocks to contract or expand. The peripheral shovel base is in sliding transmission fit with the second wedge type sliding block, and the peripheral shovel base moves to synchronously drive the second wedge type sliding block to contract or expand. Therefore, through carrying out split type design to the mechanism of reducing the kou, the central shovel base can be made littleer for the back-off embedded core that wedge type slider encloses to close accomplishes littleer, thereby satisfies the drawing of patterns demand of small-size annular back-off in the little space.
Description
Technical Field
The utility model relates to an injection mold's technical field, in particular to accurate plastic mould's split type back-off in little space contracts with a common denominator mechanism.
Background
In the injection mold industry, products with special structural features are often encountered. An annular plastic product as shown in fig. 1, which has an annular undercut at one end and an internal thread of M14X1.25 at the other end, has an internal hole diameter of 14.1mm, which is larger than the internal thread, and thus cannot be demolded together with the internally threaded core. Therefore, for the plastic product, it is common to remove the mold from one end of the ring-shaped undercut. For the annular reverse buckle, a petal type inward-shrinkage core-pulling structure, also called a reverse buckle mechanism, is generally used at present, the existing standard reverse buckle mechanism mainly comprises a central shovel base and a plurality of wedge type sliding blocks connected with the central shovel base, and when the mold is released, the central shovel base is pulled out from the centers of the wedge type sliding blocks and simultaneously drives the wedge type sliding blocks to approach to the centers, so that the sliding blocks are separated from the reverse buckle, and then the product is ejected. However, the above plastic products need to be inverted and have a small diameter, and the existing standard cork shrinking mechanism cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims at providing a split type back-off of little space of accurate plastic mould contracts with a coxi mechanism to satisfy the drawing of patterns requirement of this kind of small-size annular back-off.
In order to achieve the above object, the small-space split type reverse buckling compaction mechanism for the precise plastic mold comprises a central shovel base, three peripheral shovel bases, three first wedge type sliding blocks and three second wedge type sliding blocks, wherein the first wedge type sliding blocks and the second wedge type sliding blocks are alternately wound around the peripheral side of the central shovel base at intervals;
the inner side surface of the first wedge-type sliding block and the outer side surface of the central shovel base are provided with sliding clamping structures, and when the central shovel base moves along the axial direction of the central shovel base, the first wedge-type sliding block can be synchronously driven to contract towards the center of the central shovel base or expand outwards from the center of the central shovel base;
the second wedge type slide block is provided with a transverse sliding part, and the transverse sliding part is provided with a guide hole which forms a certain angle with the axial direction of the central shovel base; the peripheral shovel base is inserted into the guide hole of the second wedge type sliding block and provided with an inner guide surface and an outer guide surface which form a certain angle with the axial direction of the central shovel base, and when the peripheral shovel base moves along the axial direction of the central shovel base, the second wedge type sliding block is synchronously driven to contract towards the center of the central shovel base or expand outwards from the center of the central shovel base.
In the above embodiment, the lower end portion of the first cam slider has an extension portion, and the extension portion of the first cam slider surrounds a core conforming to the shape of the inner hole of the product when the mold is closed.
Optionally, the sliding engagement structure is: the device comprises a dovetail groove arranged on the outer periphery of a central shovel base and a slide rail arranged on the inner side surface of a first wedge type slide block and slidably clamped with the dovetail groove.
Optionally, the peripheral shovel base is parallel to the central shovel base in the axial direction, the outer guide surface of the peripheral shovel base is arranged on the outer side surface of the peripheral shovel base, and the inner guide surface of the peripheral shovel base is arranged on the inner side surface of the peripheral shovel base and located below the outer guide surface.
Optionally, the device further comprises an upper sliding seat, and the upper end of the first wedge type sliding block is arranged on the upper sliding seat in a sliding manner; the upper end of the peripheral shovel base is fixed on the upper sliding seat, and the lower end of the peripheral shovel base penetrates through the upper sliding seat and is inserted into the corresponding guide hole.
Optionally, a cover plate is arranged on the upper sliding seat, and the cover plate covers the upper end surfaces of the first wedge-type sliding block and the peripheral shovel base.
Optionally, the device further comprises a lower sliding seat, the lower sliding seat is located below the upper sliding seat, the transverse sliding portion of the second cam slider is slidably disposed on the lower sliding seat, and the lower end of the second cam slider penetrates through the lower sliding seat.
Optionally, a sliding groove corresponding to the second wedge type sliding block one to one is arranged in the lower sliding seat, and the transverse sliding portion of the second wedge type sliding block is slidably arranged in the corresponding sliding groove.
Optionally, the two sides of the transverse sliding portion are provided with side bars, the sliding groove is internally provided with two pressing blocks, and the pressing blocks are respectively arranged on the two sides of the transverse sliding portion and are pressed on the upper side faces of the side bars.
The technical scheme of the utility model through adopting a central shovel base and three peripheral shovel base to drive the drawing of patterns of slide wedge slider, during the die sinking, central shovel base is loosed core earlier and is driven three first slide wedge slider and break away from the goods back-off, then has peripheral shovel base and central shovel base to move together again, drives three second slide wedge slider and breaks away from the goods back-off for whole slide wedge slider breaks away from the goods back-off, thereby realizes the drawing of patterns of annular back-off.
The utility model discloses a carry out split type design to contracting with the mechanism, central shovel base only need with the cooperation of first tapered wedge slider, and second tapered wedge slider through peripheral shovel base drive can, from this, central shovel base can be done littleer for tapered wedge slider encloses the back-off that closes and inlays the core and accomplish littleer, thereby satisfies the drawing of patterns demand of small-size annular back-off in the little space.
Drawings
FIG. 1 is a cross-sectional view of a prior art annular plastic part with an annular inverted buckle;
fig. 2 is an exploded view of an embodiment of the present invention;
FIG. 3 is a schematic structural view of a center blade base;
FIG. 4 is a schematic structural diagram of a first cam slider;
FIG. 5 is a schematic structural diagram of a second cam slider;
fig. 6 is a cross-sectional view of an embodiment of the present invention in a clamped state;
fig. 7 is a cross-sectional view of an embodiment of the present invention in a one-step demolding state;
fig. 8 is a sectional view of an embodiment of the present invention in a secondary demolding state;
FIG. 9 is an enlarged view of a portion of FIG. 7 at A;
fig. 10 is a partially enlarged schematic view of a portion B in fig. 8.
In the reference numerals: 100-center shovel base, 101-dovetail groove; 200-peripheral shovel base, 200 a-outer guide surface, 200 b-inner vertical surface, 200 c-inner guide surface; 300-a first wedge-type slide block, 301-a slide rail, 302-an inverted embedded core, 303-an extension part; 400-a second wedge slide block, 401-a transverse sliding part, 402-a guide hole, 402 a-an outer side surface, 402 b-an inner side surface, 403-an inverted embedding core and 404-a side edge strip; 500-upper slide, 510-cover plate; 600-a lower sliding seat, 601-a sliding groove and 610-a pressing block; 700-product, 701-annular reverse buckle, 702-internal thread, 703-internal hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2-10 of the specification, an embodiment of the present invention provides a small-space split-type reverse-buckling compaction mechanism for a precision plastic mold, which includes a central shovel base 100, three peripheral shovel bases 200, three first tapered wedge sliders 300, and three second tapered wedge sliders 400, wherein the first tapered wedge sliders 300 and the second tapered wedge sliders 400 are alternately spaced around the central shovel base 100.
The inner side surface of the first wedge-shaped slider 300 and the outer side surface of the central shovel base 100 are provided with a sliding clamping structure, and when the central shovel base 100 moves along the axial direction of the central shovel base, the first wedge-shaped slider 300 can be synchronously driven to contract towards the center along the central shovel base 100 or expand outwards from the center of the central shovel base 100. The second cam slider 400 has a lateral sliding portion 401, and the lateral sliding portion 401 has a guide hole 402 that is angled with respect to the axial direction of the center blade base 100. The peripheral shovel base 200 is inserted into the guide hole 402 of the second wedge slider 400, and has an inner guide surface 200c and an outer guide surface 200a forming a certain angle with the axial direction of the central shovel base 100, and when the peripheral shovel base 200 moves along the axial direction of the central shovel base 100, the second wedge slider 400 is synchronously driven to contract towards the center of the central shovel base 100 or expand outwards from the center of the central shovel base 100.
The outer side surfaces of the lower end parts of the first wedge type slide block 300 and the second wedge type slide block 400 are respectively provided with an inverted buckle embedded core 302 and an inverted buckle embedded core 403 which are matched with an annular inverted buckle 701 of the product 700 in a protruding mode, under the matched die state, the first wedge type slide block 300 and the second wedge type slide block 400 are alternately attached to the outer peripheral side of the central shovel base 100 at intervals, and the inverted buckle embedded core 302 of the first wedge type slide block 300 and the inverted buckle embedded core 403 of the second wedge type slide block 400 enclose and form the annular inverted buckle embedded core which is matched with the annular inverted buckle 701 of the product 700.
The utility model provides a split type back-off contracts drawing of patterns work of sticking with a mechanism and divide into:
primary demolding: the central shovel base 100 is firstly drawn for a certain distance, and at the same time, the first wedge-type slider 300 is driven to move along the moving direction of the central shovel base 100 and to contract towards the axial lead of the central shovel base 100, so that the inverted embedding core 302 of the first wedge-type slider 300 is separated from the annular inverted buckle 701 of the product 700.
Secondary demoulding; the peripheral shovel base 200 and the central shovel base 100 move together, and in the process that the peripheral shovel base 200 moves along the axial direction of the central shovel base 100, the inner guide surface 200c of the peripheral shovel base 200 contacts with the inner side surface 402b of the guide hole 402, so that the second wedge type slide block 400 is driven to move along the movement direction of the central shovel base 100 and shrinks towards the axial lead of the central shovel base 100, the inverted embedded core 403 of the second wedge type slide block 400 is separated from the annular inverted buckle 701 of the product 700, and the demolding of the annular inverted buckle 701 of the product 700 is realized.
The mold closing process is opposite to the mold releasing process, the peripheral shovel base 200 is reset firstly, and in the resetting process, the outer guide surface 200a of the peripheral shovel base 200 is in contact with the outer side surface 402a of the guide hole 402 to drive the second wedge type slide block 400 to reset; then, the center blade 100 is reset and drives the first cam slider 300 to reset.
The utility model discloses a carry out split type design to contracting with the mechanism, central shovel base 100 only need with the cooperation of first tapered wedge slider 300, and second tapered wedge slider 400 through peripheral shovel base 200 drive can, from this, central shovel base 100 can be done littleer for the tapered wedge slider encloses the annular back-off that closes and inlays the core and accomplish littleer, thereby satisfies the drawing of patterns demand of small-size annular back-off 701 in the little space.
In this embodiment, the lower end of the first cam slider 300 has an extension 303, and in the clamped state, the extension 303 of the first cam slider 300 encloses a core that conforms to the shape of the inner hole of the product 700. Since the plastic product 700 shown in fig. 1 further has an inner hole 703 in the annular undercut 701, and the diameter of the inner hole 703 is larger than the size of the inner thread 702, an extension 700 is provided at the lower end of the first wedge shoe 300, and the first wedge shoe 300 encloses a core of the inner hole 703, so that the inner hole 700 is formed while the product 700 is forming the annular undercut 701, and the core can be moved away from the inner hole 703 of the product 700 with the first wedge shoe 300 during demolding.
Alternatively, in the above embodiment, the sliding engagement structure between the first cam slider 300 and the center blade base 100 is: a dovetail groove 101 provided on the outer peripheral side of the center blade base 100, and a slide rail 301 provided on the inner surface of the first cam slider 300 and slidably engaged in the dovetail groove 101. The central shovel base 100 is conical, and when the central shovel base 100 is pulled out from the centers of the three first tapered wedge type sliding blocks 300, the sliding rail 301 pulls the first tapered wedge type sliding blocks 300 to move upward relatively and to be folded toward the center of the central shovel base 100, so that the inverted embedded cores 302 of the first tapered wedge type sliding blocks 300 are separated from the annular inverted buckles 701 of the product 700. By using the dovetail groove 101 and the corresponding slide rail 301 as the slide engagement structure, the fitting accuracy is high and stable.
Alternatively, in the above embodiment, the main body of the peripheral blade base 200 is parallel to the axial direction of the central blade base 100, the outer guide surface 200a thereof is provided on the outer side surface of the peripheral blade base 200, and the inner guide surface 200c thereof is provided on the inner side surface of the peripheral blade base 200 and is located below the outer guide surface 200 a. As shown in fig. 6, in the mold clamped state, the outer guide surface 200a of the peripheral blade base 200 is in contact with the outer side surface 402a of the guide hole 402, so that the second cam slider 400 is held in the expanded state. When the peripheral shovel base 200 moves upward, the upper edge of the inner side surface 402a of the guide hole 402 contacts with the inner vertical surface 200b of the peripheral shovel base 200, and until the inner guide surface 200c of the peripheral shovel base 200 is attached to the inner side surface 402b of the guide hole 402, the movement of the peripheral shovel base 200 can drive the second cam slider 400 to move and contract toward the axis of the central shovel base 100. Thus, the time for demolding the second tapered wedge slider 400 can be delayed, so that the first tapered wedge slider 300 is demolded for a certain distance to form an enough virtual position for demolding the second tapered wedge slider 400.
Optionally, in the above embodiment, the split-type reverse-buckling telescoping mechanism further comprises an upper slide 500. The upper end of the first cam slider 300 is slidably disposed on the upper slider 500. The peripheral shovel base 200 is fixed at its upper end to the upper slide 500, and at its lower end, passes through the upper slide 500 and is inserted into its corresponding guide hole 402. By arranging the upper sliding seat 500, the first wedge-type sliding block 300 and the peripheral shovel base 200 can be driven to move simultaneously through the upper sliding seat 500, the structure of the telescoping mechanism is simplified, and the demolding efficiency is improved.
Optionally, in the above embodiment, a cover plate 510 is disposed on the upper slide 500, the cover plate 510 covers the upper side surface of the upper slide 500, and the first cam slider 300 and the peripheral shovel base 200 are pressed on the upper slide 500, so that the first cam slider 300 and the peripheral shovel base 200 can be relatively fixed on the upper slide 500 through the cover plate 510, which facilitates the assembly of the retractable mechanism.
Optionally, in the above embodiment, the split-type reverse buckling telescoping mechanism further comprises a lower slide 600, and the lower slide 600 is located below the upper slide 500. The lateral sliding portion 401 of the second cam slider 400 is slidably disposed on the lower slider 600, and the lower end thereof passes through the lower slider 600. Meanwhile, the lower slider 600 is provided with a avoiding hole for avoiding the peripheral shovel base 200, and the peripheral shovel base 200 sequentially passes through the corresponding guide hole 402 and the avoiding hole in the matched die state. By providing the lower slider 600, it is easy to mount the second wedge slider 400.
Alternatively, in the above embodiment, the lower slider 600 is provided with the sliding grooves 601 corresponding to the second cam sliders 400 one by one, and the lateral sliding portions 401 of the second cam sliders 400 are slidably disposed in the corresponding sliding grooves 601. In this way, the second tapered wedge slider 400 can slide along the inner wall of the sliding slot 601 to maintain the stability of the second tapered wedge slider 400 during the sliding process.
Further, in the above embodiment, the side bars 404 are provided on both sides of the lateral sliding portion 401, two pressing pieces 610 are provided in the slide groove 601, and the pressing pieces 610 are provided on both sides of the lateral sliding portion 401 and press-contact the upper side surfaces of the side bars 404. The side bars 404 are arranged on two sides of the transverse sliding part 401, and the pressing blocks 610 are arranged to limit the second wedge type sliding block 400 to slide between the two pressing blocks 610, so that the stability of the second wedge type sliding block 400 is further improved, and the second wedge type sliding block 400 is convenient to mount and dismount.
The above is only the preferred embodiment of the present invention, not used in the present invention, and any slight modifications, equivalent replacements and improvements made by the technical entity of the present invention to the above embodiments should be included in the protection scope of the technical solution of the present invention.
Claims (9)
1. A small-space split type reverse buckling and necking mechanism of a precise plastic mold is characterized by comprising a central shovel base, three peripheral shovel bases, three first wedge type sliding blocks and three second wedge type sliding blocks, wherein the first wedge type sliding blocks and the second wedge type sliding blocks are alternately wound around the peripheral side of the central shovel base at intervals;
the inner side surface of the first wedge-type sliding block and the outer side surface of the central shovel base are provided with sliding clamping structures, and when the central shovel base moves along the axial direction of the central shovel base, the first wedge-type sliding block can be synchronously driven to contract towards the center of the central shovel base or expand outwards from the center of the central shovel base;
the second wedge type slide block is provided with a transverse sliding part, and the transverse sliding part is provided with a guide hole which forms a certain angle with the axial direction of the central shovel base; the peripheral shovel base is inserted into the guide hole of the second wedge type sliding block and provided with an inner guide surface and an outer guide surface which form a certain angle with the axial direction of the central shovel base, and when the peripheral shovel base moves along the axial direction of the central shovel base, the second wedge type sliding block is synchronously driven to contract towards the center of the central shovel base or expand outwards from the center of the central shovel base.
2. The small-space split-type reverse-buckling compaction mechanism of the precise plastic mold as claimed in claim 1, wherein the sliding-clamping structure is: the device comprises a dovetail groove arranged on the outer periphery of a central shovel base and a slide rail arranged on the inner side surface of a first wedge type slide block and slidably clamped with the dovetail groove.
3. The small-space split-type reverse buckling compaction mechanism for the precision plastic mold as claimed in claim 1, wherein the peripheral shovel base is parallel to the central shovel base in the axial direction, the outer guide surface of the peripheral shovel base is disposed on the outer side surface of the peripheral shovel base, and the inner guide surface of the peripheral shovel base is disposed on the inner side surface of the peripheral shovel base and below the outer guide surface.
4. The small-space split-type reverse-buckling Koch mechanism of the precise plastic mold in claim 3, further comprising an upper slide seat, wherein the upper end of the first wedge-type slide block is slidably arranged on the upper slide seat; the upper end of the peripheral shovel base is fixed on the upper sliding seat, and the lower end of the peripheral shovel base penetrates through the upper sliding seat and is inserted into the corresponding guide hole.
5. The small-space split-type reverse-buckling compaction mechanism for the precision plastic mold of claim 4, wherein a cover plate is arranged on the upper sliding seat, and the cover plate is pressed on the upper end surfaces of the first wedge-type sliding block and the peripheral shovel base.
6. The small space split-type reverse-buckling cocal mechanism for precision plastic molds of claim 4, further comprising a lower slide seat, said lower slide seat being located below said upper slide seat, said lateral sliding portion of said second cam slider being slidably disposed on said lower slide seat, and a lower end thereof passing through said lower slide seat.
7. The small-space split-type reverse-buckling compression mechanism for the precision plastic mold of claim 6, wherein the lower slide seat is provided with slide grooves corresponding to the second tapered wedge type slide blocks one to one, and the transverse sliding portions of the second tapered wedge type slide blocks are slidably disposed in the corresponding slide grooves.
8. The mechanism of claim 7, wherein the lateral sliding part has side bars at both sides thereof, and the sliding groove has two pressing blocks at both sides thereof, and the pressing blocks are pressed against the side bars.
9. The mechanism of any one of claims 1-8, wherein the lower end of the first cam slider has an extension portion, and when the mold is closed, the extension portion of the first cam slider encloses a core that matches the shape of the inner hole of the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922394398.2U CN211763196U (en) | 2019-12-26 | 2019-12-26 | Small-space split type reverse buckling shrinkage mechanism of precise plastic mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922394398.2U CN211763196U (en) | 2019-12-26 | 2019-12-26 | Small-space split type reverse buckling shrinkage mechanism of precise plastic mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211763196U true CN211763196U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922394398.2U Active CN211763196U (en) | 2019-12-26 | 2019-12-26 | Small-space split type reverse buckling shrinkage mechanism of precise plastic mold |
Country Status (1)
| Country | Link |
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| CN (1) | CN211763196U (en) |
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- 2019-12-26 CN CN201922394398.2U patent/CN211763196U/en active Active
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