CN215242655U - Back-off core-pulling structure of injection mold - Google Patents
Back-off core-pulling structure of injection mold Download PDFInfo
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- CN215242655U CN215242655U CN202022713275.3U CN202022713275U CN215242655U CN 215242655 U CN215242655 U CN 215242655U CN 202022713275 U CN202022713275 U CN 202022713275U CN 215242655 U CN215242655 U CN 215242655U
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Abstract
The utility model discloses an inverted buckle core-pulling structure of an injection mold, which comprises a core-pulling seat, a core-pulling block, at least three first molding blocks and a plurality of second molding blocks, wherein the number of the second molding blocks is the same as that of the first molding blocks; the core pulling seat is provided with a core pulling channel, the core pulling block, each first forming block and each second forming block movably penetrate through the core pulling channel, and each first forming block and each second forming block are in sliding fit with the outer wall of the core pulling block. The utility model discloses the operation is very simple and convenient, can effectively improve the efficiency of loosing core of the injection moulding product who has the back-off.
Description
Technical Field
The utility model relates to a field of moulding plastics especially indicates an injection mold's back-off structure of loosing core.
Background
The inside of a plurality of present injection products can be provided with an inward convex back-off which is annular, and because the internal structures of some injection products are more complicated, such as a three-way pipe, when the injection products with complicated internal structures are injected, the back-off forming block for forming the back-off is required to be divided into a plurality of sub-blocks, the sub-blocks are spliced to form a complete back-off forming block, the back-off forming block is used for circulation and is arranged in an injection mold, after the injection products are injected and formed, the back-off forming block is taken out of the injection mold along with the injection products, and then the sub-blocks are gradually taken out by manpower with the help of tools in sequence until the whole back-off forming block is taken out of the injection products; the whole core pulling process occupies more labor, the labor cost is high, the working strength is high, and the working efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an injection mold's back-off structure of loosing core, its work efficiency that can effectively improve to loose core.
In order to achieve the above purpose, the solution of the present invention is:
the inverted buckle core-pulling structure of the injection mold comprises a core-pulling seat, a core-pulling block, at least three first molding blocks and a plurality of second molding blocks, wherein the number of the second molding blocks is the same as that of the first molding blocks; the core pulling seat is provided with a core pulling channel which penetrates through the core pulling seat front and back, and the inner wall of the core pulling channel is provided with first radial limiting grooves with the same number as the first forming blocks and second radial limiting grooves with the same number as the second forming blocks; the core pulling block can move back and forth and penetrates through the core pulling channel, and the outer wall of the core pulling block is provided with a plurality of first inclined guide surfaces and a plurality of second inclined guide surfaces; the number of the first inclined guide surfaces is the same as that of the first forming blocks, the first inclined guide surfaces are uniformly arranged on the outer wall of the core pulling block, the first inclined guide surfaces are arranged in an inclined mode from front to back, and a first sliding rail is arranged on each first inclined guide surface in a protruding mode; the number of the second inclined guide surfaces is the same as that of the second forming blocks, each second inclined guide surface is uniformly arranged on the outer wall of the core pulling block, a first inclined guide surface is arranged between every two adjacent second inclined guide surfaces, each second inclined guide surface is obliquely arranged from front to back, and a second sliding rail is convexly arranged on each second inclined guide surface; each first forming block can move back and forth and penetrates through the core-pulling channel, the inner side surface of each first forming block is in sliding contact with each first inclined guide surface, and a first sliding groove in sliding connection with a first sliding rail on each first inclined guide surface is formed in the inner side surface of each first forming block; the outer side of the front end of each first molding block is provided with a first back-off molding groove, the outer side of the rear end of each first molding block is provided with a first radial limiting block, and the first radial limiting block of each first molding block can be inserted into each first radial limiting groove along the radial direction of the core-pulling block; each second forming block can move back and forth and penetrates through the core pulling channel, the inner side surface of each second forming block is in sliding contact with each second inclined guide surface, and a second sliding groove in sliding connection with a second sliding rail on each second inclined guide surface is formed in each inner side surface of each second forming block; each second forming block is positioned between two adjacent first forming blocks, and two sides of each second forming block are in sliding contact with the inner side surfaces of the two adjacent first forming blocks of the second forming block respectively; a second back-off forming groove is formed in the outer side of the front end of each second forming block, a second radial limiting block is arranged on the outer side of the rear end of each second forming block, and the second radial limiting block of each second forming block can be inserted into each second radial limiting groove in a manner of moving along the radial direction of the core-pulling block; when the first radial limiting blocks of the first forming blocks are respectively and completely inserted into the first radial limiting grooves and the second radial limiting blocks of the second forming blocks are respectively and completely inserted into the second radial limiting grooves, the first back-off forming grooves of the first forming blocks are in butt joint with the second back-off forming grooves of the second forming blocks to form an annular groove, and the first forming blocks and the second forming blocks are in butt joint to form a cylinder in full circumferential contact with the front end opening of the core pulling channel.
The back-off core-pulling structure of the injection mold further comprises a linkage assembly; the linkage assembly comprises a linkage block, a linkage rod and a linkage seat; the linkage seat is provided with guide through holes along the front and back directions; the linkage block can move back and forth and penetrate through the guide through hole, the linkage block is provided with an inclined guide hole which is inclined backwards from top to bottom, the linkage rod movably penetrates through the inclined guide hole, and the rear end of the core-pulling block is fixedly connected with the linkage block.
The rear end of the core-pulling seat is fixedly connected with the front end of the linkage seat.
The linkage seat is provided with a yielding notch positioned above the guide through hole and a yielding inclined hole positioned below the guide through hole, the opening of the yielding notch faces backwards, and the yielding inclined hole is obliquely arranged in front of the yielding inclined hole; the linkage rod movably penetrates through the yielding notch and the yielding inclined hole, and a gap is formed between the linkage rod and the rear side of the yielding inclined hole.
The first sliding groove of the first forming block is a dovetail groove, and the first sliding rail on the first inclined guide surface is a dovetail sliding rail matched with the first sliding groove.
And the second sliding groove of the second forming block is a dovetail groove, and the second sliding rail on the second inclined guide surface is a dovetail sliding rail matched with the second sliding groove.
After the scheme is adopted, the utility model discloses when using, earlier the utility model discloses put into injection mold's inner chamber to make the first radial stopper of each first shaping piece insert respectively that the radial stopper of second of each first radial spacing groove and each second shaping piece inserts respectively that each second inserts respectively completely radial spacing groove, when injection moulding product is shaping in the injection mold inner chamber like this, the annular groove that the butt joint of the first back-off shaping groove through each first shaping piece and the second back-off shaping groove of each second shaping piece formed makes the back-off of injection moulding product inner wall annular structure. After an injection product is molded, the injection mold is opened and the core pulling block is pulled backwards, and at the moment, due to the fact that each first inclined guide surface and each second inclined guide surface of the core pulling block are arranged in an inclined mode from front to back, under the action of sliding connection matching of the first sliding groove and the first sliding rail and sliding connection matching of the second sliding groove and the second sliding rail, the core pulling block moves backwards, so that each first molding block and each second molding block are driven to move towards the central shaft of the core pulling block, and the first back-off molding groove of each first molding block and the second back-off molding groove of each second molding block are separated from molded back-off; when each second forming block moves towards the central shaft of the core pulling block to abut against each second forming block, the first radial limiting block of each first forming block can be completely separated from the first radial limiting groove, the second radial limiting block of each second forming block can be completely separated from the second radial limiting groove, and meanwhile, the first back-off forming groove of each first forming block and the second back-off forming groove of each second forming block can be completely separated from the formed back-off; after that, the core-pulling block moves backwards continuously, and then the core-pulling block drives each first molding block and each second molding block to move backwards, so that each first molding block and each second molding block can be separated from the injection molding product, and the core pulling is completed.
According to the structure, the utility model discloses only need remove when loosing core injection product to having the back-off take out the core piece can, the operation is very simple and convenient, can effectively improve the work efficiency of loosing core.
Drawings
Fig. 1 is an exploded view 1 of the present invention;
fig. 2 is an exploded view 2 of the present invention;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a sectional view of the injection molded article of the present invention in combination with FIG. 1;
FIG. 5 is a sectional view of the injection molded article of the present invention in combination with FIG. 2;
description of reference numerals:
a core pulling seat 1, a core pulling channel 11, a first radial limiting groove 111, a second radial limiting groove 112,
a core block 2, a first inclined guide surface 21, a second inclined guide surface 22, a first slide rail 23, a second slide rail 24,
a first molding block 3, a first sliding groove 31, a first back-off molding groove 32, a first radial limiting block 33,
a second molding block 4, a second sliding groove 41, a second back-off molding groove 42, a second radial limiting block 43,
the linkage assembly 5, the linkage block 51, the inclined guide hole 511, the linkage rod 52, the linkage seat 53, the guide through hole 531, the abdicating notch 532, the abdicating inclined hole 533,
injection molded product a, undercut a 1.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
As shown in fig. 1 to 5, the utility model discloses an inverted buckle core-pulling structure of an injection mold, which comprises a core-pulling seat 1, a core-pulling block 2, at least three first molding blocks 3, and a plurality of second molding blocks 4 with the same number as the first molding blocks 3; the core pulling seat 1 is provided with a core pulling channel 11 which penetrates through the core pulling seat front and back, and the inner wall of the core pulling channel 11 is provided with first radial limiting grooves 111 with the same number as the first forming blocks 3 and second radial limiting grooves 112 with the same number as the second forming blocks 4; the core pulling block 2 can move back and forth and penetrates through the core pulling channel 11, the outer wall of the core pulling block 2 is provided with a plurality of first inclined guide surfaces 21 and a plurality of second inclined guide surfaces 22, the number of the first inclined guide surfaces 21 is the same as that of the first forming blocks 3, each first inclined guide surface 21 is uniformly arranged on the outer wall of the core pulling block 3, each first inclined guide surface 21 is obliquely arranged from front to back, each first inclined guide surface 21 is convexly provided with a first slide rail 23, the number of the second inclined guide surfaces 22 is the same as that of the second forming blocks 4, each second inclined guide surface 22 is uniformly arranged on the outer wall of the core pulling block 2, a first inclined guide surface 21 is arranged between every two adjacent second inclined guide surfaces 22, each second inclined guide surface 22 is obliquely arranged from front to back, and each second inclined guide surface 22 is convexly provided with a second slide rail 24; each first molding block 3 can move back and forth and penetrate through the core-pulling channel 11, the inner side surface of each first molding block 3 is in sliding contact with each first inclined guide surface 21, the inner side surface of each first molding block 3 is provided with a first sliding chute 31 in sliding connection with a first sliding rail 23 on the first inclined guide surface 21, the outer side of the front end of each first molding block 3 is provided with a first back-off molding groove 32, the outer side of the rear end of each first molding block 3 is provided with a first radial limiting block 33, and the first radial limiting blocks 33 of each first molding block 3 can be inserted into the first radial limiting grooves 111 along the radial movement of the core-pulling block 2; each second forming block 4 can pass through the core-pulling channel 11 in a back-and-forth movement manner, the inner side surface of each second forming block 4 is in sliding contact with each second inclined guide surface 22, the inner side surface of each second forming block 4 is provided with a second sliding chute 41 in sliding connection with a second sliding rail 24 on the second inclined guide surface 22, each second forming block 4 is located between two adjacent first forming blocks 3, two sides of each second forming block 4 are in sliding contact with the inner side surfaces of two adjacent first forming blocks 3 of the second forming block 4, the outer side of the front end of each second forming block 4 is provided with a second back-off forming groove 42, the outer side of the rear end of each second forming block 4 is provided with a second radial limiting block 43, and the second radial limiting blocks 43 of each second forming block 4 can be inserted into each second radial limiting groove 112 along the core-pulling block 2 in a radial movement manner.
As shown in fig. 3 to 5, when the first radial stoppers 33 of the first molding blocks 3 are respectively and completely inserted into the first radial stopper grooves 111 and the second radial stoppers 43 of the second molding blocks 4 are respectively and completely inserted into the second radial stopper grooves 112, the first inverted molding grooves 32 of the first molding blocks 3 and the second inverted molding grooves 42 of the second molding blocks 4 are butted to form an annular groove, and meanwhile, the first molding blocks 3 and the second molding blocks 4 are butted to form a cylinder which is in full circumferential contact with the front end opening of the core pulling channel 111. The annular groove formed by butting the first inverted molding groove 32 of each first molding block 3 and the second inverted molding groove 42 of each second molding block 4 is used for molding an annular inverted buckle a1, and the cylinder formed by butting each first molding block 3 and each second molding block 4 is in full-circle contact with the front end opening of the core-pulling channel 111, that is, no gap exists between the outer wall of the cylinder formed by butting each first molding block 3 and each second molding block 4 and the inner wall of the front end opening of the core-pulling channel 11, so that molten plastic is prevented from entering the core-pulling channel 11 during injection molding.
The utility model discloses when using, earlier will the utility model discloses put into injection mold's inner chamber to make each first forming block 3's first radial stopper 33 insert respectively completely each first radial spacing groove 111 and each second forming block 4's the radial stopper 43 of second insert respectively each second radial spacing groove 112 completely, when injection moulding product is shaping in the injection mold inner chamber like this, the annular groove that the butt joint formed through each first forming block 3's first back-off profiled groove 32 and each second forming block 4's second back-off profiled groove 42 makes injection moulding product A inner wall form annular structure's back-off A1. After an injection product is molded, opening the injection mold and pulling the core pulling block 2 backwards, wherein at the moment, due to the fact that each first inclined guide surface 21 and each second inclined guide surface 22 of the core pulling block 2 are arranged in an inclined manner from front to back, under the action of the sliding connection fit of the first sliding groove 31 and the first sliding rail 23 and the sliding connection fit of the second sliding groove 41 and the second sliding rail 24, the core pulling block 2 moves backwards, and then each first molding block 3 and each second molding block 4 are driven to move towards the central shaft of the core pulling block 2, so that the first back-off molding groove 32 of each first molding block 3 and the second back-off molding groove 42 of each second molding block 4 are separated from the molded back-off A1; when the second forming blocks 4 move towards the central axis of the core pulling block 2 until the second forming blocks 4 abut against each other, at this time, the first radial limiting blocks 33 of the first forming blocks 3 completely separate from the first radial limiting grooves 111, the second radial limiting blocks 43 of the second forming blocks 4 also completely separate from the second radial limiting grooves 112, and meanwhile, the first back-off forming grooves 32 of the first forming blocks 3 and the second back-off forming grooves 42 of the second forming blocks 4 completely separate from the formed back-off A1; after that, the core-pulling block 2 is moved backwards continuously, and then the core-pulling block 2 can drive each first molding block 3 and each second molding block 4 to move backwards, so that each first molding block 3 and each second molding block 4 can be separated from the injection molding product a, and the whole core-pulling process is very simple and convenient.
As shown in fig. 1 and fig. 2, the first sliding groove 31 of the first forming block 3 is a dovetail groove, and the first sliding rail 23 on the first inclined guide surface 21 of the core block 2 is a dovetail sliding rail adapted to the first sliding groove 31, so that the core block 2 can drive each first forming block 3 to move toward the central axis of the core block 2; similarly, the second sliding groove 41 of the second forming block 4 is also a dovetail groove, and the second sliding rail 24 on the second inclined guide surface 22 of the core pulling block 2 is a dovetail sliding rail adapted to the second sliding groove 41, so that the core pulling block 2 can drive each second forming block 4 to move toward the central axis of the core pulling block 2.
With reference to fig. 1 to 5, the present invention may further comprise a linkage assembly 5; the linkage assembly 5 comprises a linkage block 51, a linkage rod 52 and a linkage seat 53; the front end of the linkage seat is fixedly connected with the rear end of the core drawing seat, and the linkage seat 53 is provided with a guide through hole 531 along the front-back direction; the linkage block 51 can be arranged in the guide through hole 531 in a penetrating way in a front-back moving way, the rear end of the core pulling block 2 is fixedly connected with the linkage block 51, the linkage block 51 is provided with an inclined guide hole 511 which is inclined backwards from top to bottom, and the linkage rod 52 can movably penetrate through the inclined guide hole 511. The upper end of the linkage rod 52 is used for connecting the upper die of the injection mold, so that when the injection mold is opened, the upper die of the injection mold drives the linkage rod 52 to move upwards, and at this time, the linkage rod 52 pushes the inclined guide hole 511 to move the linkage block 51 backwards, so as to drive the drawing block 2 to move backwards, so that each first molding block 3 and each second molding block 4 can be separated from the reverse buckle a 1. As shown in fig. 1 and 4, the linkage seat 53 is provided with an abdicating notch 532 located above the guide through hole 531 and an abdicating inclined hole 533 located below the guide through hole 531, an opening of the abdicating notch 532 faces rearward, the abdicating inclined hole 533 is arranged obliquely in front of the abdicating inclined hole, the linkage rod 52 movably passes through the abdicating notch 532 and the abdicating inclined hole 533, and a gap is provided between the linkage rod 52 and the abdicating inclined hole 532; wherein the abdicating notch 532 and abdicating inclined hole 532 do not interfere with the upward movement of the trace 52.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (6)
1. The utility model provides an injection mold's back-off structure of loosing core which characterized in that: the core pulling device comprises a core pulling seat, a core pulling block, at least three first molding blocks and a plurality of second molding blocks, wherein the number of the second molding blocks is the same as that of the first molding blocks;
the core pulling seat is provided with a core pulling channel which penetrates through the core pulling seat front and back, and the inner wall of the core pulling channel is provided with first radial limiting grooves with the same number as the first forming blocks and second radial limiting grooves with the same number as the second forming blocks;
the core pulling block can move back and forth and penetrates through the core pulling channel, and the outer wall of the core pulling block is provided with a plurality of first inclined guide surfaces and a plurality of second inclined guide surfaces; the number of the first inclined guide surfaces is the same as that of the first forming blocks, the first inclined guide surfaces are uniformly arranged on the outer wall of the core pulling block, the first inclined guide surfaces are arranged in an inclined mode from front to back, and a first sliding rail is arranged on each first inclined guide surface in a protruding mode; the number of the second inclined guide surfaces is the same as that of the second forming blocks, each second inclined guide surface is uniformly arranged on the outer wall of the core pulling block, a first inclined guide surface is arranged between every two adjacent second inclined guide surfaces, each second inclined guide surface is obliquely arranged from front to back, and a second sliding rail is convexly arranged on each second inclined guide surface;
each first forming block can move back and forth and penetrates through the core-pulling channel, the inner side surface of each first forming block is in sliding contact with each first inclined guide surface, and a first sliding groove in sliding connection with a first sliding rail on each first inclined guide surface is formed in the inner side surface of each first forming block; the outer side of the front end of each first molding block is provided with a first back-off molding groove, the outer side of the rear end of each first molding block is provided with a first radial limiting block, and the first radial limiting block of each first molding block can be inserted into each first radial limiting groove along the radial direction of the core-pulling block;
each second forming block can move back and forth and penetrates through the core pulling channel, the inner side surface of each second forming block is in sliding contact with each second inclined guide surface, and a second sliding groove in sliding connection with a second sliding rail on each second inclined guide surface is formed in each inner side surface of each second forming block; each second forming block is positioned between two adjacent first forming blocks, and two sides of each second forming block are in sliding contact with the inner side surfaces of the two adjacent first forming blocks of the second forming block respectively; a second back-off forming groove is formed in the outer side of the front end of each second forming block, a second radial limiting block is arranged on the outer side of the rear end of each second forming block, and the second radial limiting block of each second forming block can be inserted into each second radial limiting groove in a manner of moving along the radial direction of the core-pulling block;
when the first radial limiting blocks of the first forming blocks are respectively and completely inserted into the first radial limiting grooves and the second radial limiting blocks of the second forming blocks are respectively and completely inserted into the second radial limiting grooves, the first back-off forming grooves of the first forming blocks are in butt joint with the second back-off forming grooves of the second forming blocks to form an annular groove, and the first forming blocks and the second forming blocks are in butt joint to form a cylinder in full circumferential contact with the front end opening of the core pulling channel.
2. The inverted buckle core-pulling structure of an injection mold according to claim 1, characterized in that: also comprises a linkage component;
the linkage assembly comprises a linkage block, a linkage rod and a linkage seat; the linkage seat is provided with guide through holes along the front and back directions; the linkage block can move back and forth and penetrate through the guide through hole, the linkage block is provided with an inclined guide hole which is inclined backwards from top to bottom, the linkage rod movably penetrates through the inclined guide hole, and the rear end of the core-pulling block is fixedly connected with the linkage block.
3. The inverted buckle core-pulling structure of an injection mold according to claim 2, characterized in that: the rear end of the core-pulling seat is fixedly connected with the front end of the linkage seat.
4. The inverted buckle core-pulling structure of an injection mold according to claim 2 or 3, characterized in that: the linkage seat is provided with a yielding notch positioned above the guide through hole and a yielding inclined hole positioned below the guide through hole, the opening of the yielding notch faces backwards, and the yielding inclined hole is obliquely arranged in front of the yielding inclined hole; the linkage rod movably penetrates through the yielding notch and the yielding inclined hole, and a gap is formed between the linkage rod and the rear side of the yielding inclined hole.
5. The inverted buckle core-pulling structure of an injection mold according to claim 1, characterized in that: the first sliding groove of the first forming block is a dovetail groove, and the first sliding rail on the first inclined guide surface is a dovetail sliding rail matched with the first sliding groove.
6. The inverted buckle core-pulling structure of an injection mold according to claim 1 or 5, characterized in that: and the second sliding groove of the second forming block is a dovetail groove, and the second sliding rail on the second inclined guide surface is a dovetail sliding rail matched with the second sliding groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022713275.3U CN215242655U (en) | 2020-11-20 | 2020-11-20 | Back-off core-pulling structure of injection mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022713275.3U CN215242655U (en) | 2020-11-20 | 2020-11-20 | Back-off core-pulling structure of injection mold |
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| CN215242655U true CN215242655U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714582A (en) * | 2022-05-09 | 2022-07-08 | 东莞市誉鑫新能源科技有限公司 | Side hole inside buckle demoulding structure and device and side hole inside buckle demoulding method |
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2020
- 2020-11-20 CN CN202022713275.3U patent/CN215242655U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714582A (en) * | 2022-05-09 | 2022-07-08 | 东莞市誉鑫新能源科技有限公司 | Side hole inside buckle demoulding structure and device and side hole inside buckle demoulding method |
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