CN116727608B - Mould core-pulling structure - Google Patents
Mould core-pulling structure Download PDFInfo
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- CN116727608B CN116727608B CN202310708472.1A CN202310708472A CN116727608B CN 116727608 B CN116727608 B CN 116727608B CN 202310708472 A CN202310708472 A CN 202310708472A CN 116727608 B CN116727608 B CN 116727608B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000036961 partial effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 23
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- 238000005266 casting Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a die core-pulling structure, which comprises at least two first inserts, wherein the first inserts are arranged on the die core-pulling structure; at least two second inserts, the second inserts and the first inserts have at least two combination states: first combination mode: the first insert and the second insert are spliced into a mold core with a cylindrical surface on the periphery, and a drawing hole is formed in the mold core; the second combination mode is as follows: the first insert and the second insert shrink inwards, and the outer contours of the first insert and the second insert are contained in the cylindrical surfaces corresponding to the mold cores in a first combination mode; the driving block is in sliding connection with the first insert and the second insert, is arranged in a sliding manner, and one end of the driving block is positioned in the drawing hole; to switch between the first and second combination modes by axial movement of the drive block. The invention can reduce the machining allowance of the inner hole of the motor shell product.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a core-pulling structure of a mold.
Background
With the continuous growth and development of electric automobiles, the demand of aluminum alloy motor housing products continuously rises, how to reduce the manufacturing cost of the aluminum alloy motor housing products is high, the competitive advantage of the products is improved, and the problem to be solved in manufacturing enterprises is very much. The casting and forming of the motor shell product with the inner hole shape characteristic is generally realized by forming an inner hole with machining allowance through the core pulling geometric shape of a mold, and the conventional core pulling demoulding technology is realized by adopting a core pulling structure with a pattern drawing gradient.
The conventional core-pulling and demolding technology for forming the inner hole geometric shape of the motor shell product is realized by adopting a core-pulling structure with a draft angle, and the structure is composed of an upper die 1 'and a core-pulling die 2' with the draft angle as shown in figure 1, and is simple in structure. However, the machining allowance of the inner hole of the motor shell product is greatly increased due to the existence of the draft angle, as shown in fig. 2, the average thickness of the machining allowance 4 'of the product 3' is more than 5mm, so that the waste of aluminum alloy materials and the increase of the machining CT period are caused, and the manufacturing cost of the product is high.
How to reduce the machining allowance of the inner hole of the motor shell product is one of the important problems to be solved in the field.
Disclosure of Invention
The invention aims to provide a core pulling structure of a mold, which solves the defects in the prior art and can reduce the machining allowance of an inner hole of a motor shell product.
The invention provides a core-pulling structure of a mold, which comprises,
at least two first inserts;
at least two second inserts, the second inserts and the first inserts have at least two combination states:
first combination mode: the first insert and the second insert are spliced into a mold core with a cylindrical surface on the periphery, and a drawing hole is formed in the mold core;
the second combination mode is as follows: the first insert and the second insert shrink inwards, and the outer contours of the first insert and the second insert are contained in the cylindrical surfaces corresponding to the mold cores in a first combination mode;
the driving block is in sliding connection with the first insert and the second insert, is arranged in a sliding manner, and one end of the driving block is positioned in the drawing hole; to switch between the first and second combination modes by axial movement of the drive block.
The mold core-pulling structure comprises the lower mold, wherein the lower mold is used for pulling the lower mold;
the lower die is provided with a first positioning block and a second positioning block;
one end of the first insert is provided with a first positioning groove, and one end of the second insert is provided with a second positioning groove; the first positioning groove is used for being matched with the first positioning block, and the second positioning groove is used for being matched with the second positioning block so as to be matched with the driving block to match the first insert with the second insert in a first combination mode.
The mould core-pulling structure comprises the upper mould and the cover plate, wherein the upper mould is provided with the through holes;
the cover plate is annular and is arranged at the top of the upper die; the inner hole of the cover plate coincides with the center line of the through hole;
the driving block penetrates through the through hole and is connected with the first insert and the second insert in a sliding fit mode.
The mould core-pulling structure comprises a support and a telescopic piece, wherein the support is arranged on the support;
the support is fixedly arranged on the cover plate, one end of the telescopic piece is fixedly connected with the support, and the other end of the telescopic piece is fixedly connected with the driving block;
the telescopic piece is used for driving the driving block to move along the axial direction of the through hole, and enabling the first insert and the second insert to be switched between a first combination mode and a second combination mode.
The die core-pulling structure comprises a first insert and a second insert, wherein the first insert is provided with a first cavity and a second cavity, and the second cavity is provided with a second cavity;
a first inclined plane is arranged on the inner side of the first insert, and a first sliding block is fixedly arranged on the first inclined plane;
a second inclined plane is arranged on the inner side of the second insert, and a second sliding block is fixedly arranged on the second inclined plane;
in a first combination mode, the first inclined plane and the second inclined plane are matched to form the drawing hole;
the driving block is provided with a third inclined plane matched with the first inclined plane and a fourth inclined plane matched with the second inclined plane; the third inclined plane is provided with a first chute matched with the first sliding block, and the fourth inclined plane is provided with a second chute matched with the second sliding block; the first sliding block and the second sliding block are both T-shaped sliding blocks.
The mold core-pulling structure as described above, wherein, optionally, the first insert gradually becomes smaller in size in the circumferential direction of the core in the inside-out direction;
the second insert becomes larger in size in the circumferential direction of the core in the inside-out direction.
The mold core-pulling structure as described above, wherein, optionally, in a direction away from the upper mold, the first insert becomes smaller in size in the circumferential direction of the mold core, and the second insert becomes larger in size in the circumferential direction of the mold core.
The mould core-pulling structure comprises a limiting ring, wherein the limiting ring is fixedly arranged on the upper mould, the center line of the inner hole of the limiting ring coincides with the center line of the through hole;
the limiting ring is provided with a plurality of third sliding grooves along the radial direction; one side of the limiting ring is abutted against the cover plate, and a sliding hole is formed by the third sliding groove;
the outer side of one end, close to the upper die, of the first insert and the outer side of one end, close to the upper die, of the second insert are provided with guide sliding blocks;
the guide sliding block is connected with the corresponding sliding hole in a sliding fit manner.
The mould core pulling structure comprises the driving block, wherein the driving block is provided with a driving block, and the driving block is provided with a driving block.
The mold core pulling structure is characterized in that the cover plate is provided with a cold water pipeline, and the cold water pipeline is communicated with the drawing hole.
Compared with the prior art, the invention can control the machining allowance of the inner hole of the product during casting, and reduce the material consumption and the machining CT period. When the aluminum alloy motor shell product is applied to the aluminum alloy motor shell product, the material loss of the aluminum alloy motor shell product in casting production can be reduced, the machining allowance of an inner hole is reduced by about 70%, the material consumption cost is saved, the CT period for machining the inner hole of the motor shell is reduced by about 40%, and the labor cost is saved.
Drawings
FIG. 1 is a schematic view of a prior art disclosed mold with draft angle;
FIG. 2 is a schematic illustration of product tooling margins as disclosed in the prior art;
FIG. 3 is a perspective view of a core-pulling structure of a mold disclosed in example 1 of the present invention;
FIG. 4 is a perspective view of a mold core-pulling structure according to embodiment 1 of the present invention mated with a lower mold;
FIG. 5 is a schematic illustration of a first insert disclosed in example 1 of the present invention;
FIG. 6 is a schematic illustration of a second insert disclosed in example 1 of the present invention;
FIG. 7 is a perspective view of a loose core disclosed in example 1 of the present invention;
FIG. 8 is a perspective view of a stop collar disclosed in example 1 of the present invention;
FIG. 9 is a schematic view showing a part of a core-pulling structure of a mold according to embodiment 2 of the present invention;
fig. 10 is a schematic diagram of the working principle of the present invention.
Reference numerals illustrate:
1 '-upper type, 2' -core pulling, 3 '-product and 4' -machining allowance;
the mold comprises a 1-mold core, a 2-driving block, a 3-lower mold, a 4-upper mold, a 5-cover plate, a 6-bracket, a 7-expansion piece, an 8-limiting ring, a 9-guide sliding block and a 10-limiting block;
11-a first insert, 12-a second insert and 13-a hole;
111-a first positioning groove, 112-a first inclined plane, 113-a first sliding block;
121-a second positioning groove, 122-a second inclined plane, 123-a second sliding block;
21-third inclined plane, 22-fourth inclined plane, 23-first chute and 24-second chute;
31-a first positioning block, 32-a second positioning block;
51-cold water holes;
81-third chute.
Detailed Description
The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In order to solve the problems set forth in the background art, the present invention discloses the following embodiments:
in the case of example 1,
referring to fig. 3 to 8, the present embodiment provides a core-pulling structure of a mold, which includes a first insert 11, a second insert 12, and a driving block 2. The first insert 11 and the second insert 12 are used for forming the mold core 1, and the driving block 2 is used for enabling the first insert 11 and the second insert 12 to shrink inwards when the mold core 1 is pulled out, so that a workpiece can be conveniently and smoothly demolded.
Specifically, the number of first inserts 11 is at least two; the number of second inserts 12 is at least two. In the specific implementation, too many first inserts 11 and second inserts 12 are inconvenient to splice into the mold core 1 with the outer circumferential side being a cylindrical surface, and too few first inserts 11 and second inserts 12 are inconvenient to realize inward shrinkage in demolding. In a preferred manner, the number of the first inserts 11 and the second inserts 12 is two, and the two first inserts 11 and the two second inserts 12 are arranged at intervals along the circumferential direction.
In particular, in order to facilitate the formation of the internal hole in the product and the smooth demolding, the second insert 12 and the first insert 11 have at least two combinations:
first combination mode: the first insert 11 and the second insert 12 are spliced into a mold core 1 with a cylindrical circumference, and a drawing hole 13 is formed in the mold core 1. Through the first combination mode, the mold core 1 capable of feeling the cylindrical surface is convenient for forming a cylindrical inner hole on a workpiece, compared with the mold core 1 with the conical surface in the prior art, the machining allowance of the invention is greatly reduced, the material loss of aluminum alloy motor shell products in casting production is reduced, the inner hole machining allowance is reduced by about 70%, the material consumption cost is saved, the machining CT period of the inner hole of the motor shell is reduced by about 40%, and the labor cost is saved.
The second combination mode is as follows: the first insert 11 and the second insert 12 shrink inwards, and the outer contour of the first insert is contained in the corresponding cylindrical surface of the mold core 1 in the first combination mode. The difficulty of casting production with a cylindrical mould core 1 is that the mould core 1 is not easy to demould. By the second combination, after casting, all the first inserts 11 and all the second inserts 12 can be released from the bore.
The driving block 2 is in sliding connection with the first insert 11 and the second insert 12, the driving block 2 is arranged in a sliding manner, and one end of the driving block is positioned in the drawing hole 13; to switch between the first and second combination modes by axial movement of the drive block 2. In the concrete implementation, by the two combination modes of the first insert 11 and the second insert 12, a mold core 1 with a cylindrical appearance can be formed in the casting process, compared with a conical mold core, the formed machining allowance is smaller, the material loss of an aluminum alloy motor shell product in casting production can be reduced, the inner hole machining allowance is reduced by about 70%, the material consumption cost is saved, the inner hole machining CT period of the motor shell is reduced by about 40%, and the labor cost is saved.
In specific implementation, referring to fig. 4, the lower die 3 is further included; the lower die 3 has the function of providing a bottom support for casting on the one hand, and on the other hand, in the solution provided by the invention, is also used for limiting the first insert 11 and the second insert 12 so as to form a structure with cylindrical surfaces on the outer periphery side in a first combination manner.
Specifically, the lower die 3 is provided with a first positioning block 31 and a second positioning block 32; a first positioning groove 111 is formed in one end of the first insert 11, and a second positioning groove 121 is formed in one end of the second insert 12; the first positioning groove 111 is configured to mate with the first positioning block 31, and the second positioning groove 121 is configured to mate with the second positioning block 32, so as to mate with the driving block 2 to match the first insert 11 and the second insert 12 in a first combination manner.
In a specific implementation, as a preferred implementation manner, a circular groove may be provided on the lower die 3, and the first positioning block 31 and the second positioning block 32 are disposed at a side wall of the circular groove, so that when the first positioning groove 111 is matched with the first positioning block 31 and the second positioning groove 121 is matched with the second positioning block 32, a cylindrical surface formed by the first insert 11 and the second insert 12 abuts against a side surface of the circular groove.
When in specific implementation, the device further comprises an upper die 4 and a cover plate 5, wherein a through hole is formed in the upper die 4; the through hole is used for the driving block 2 to pass through. The cover plate 5 is annular and is arranged at the top of the upper die 4; the inner hole of the cover plate 5 coincides with the center line of the through hole; the driving block 2 passes through the through hole and is connected with the first insert 11 and the second insert 12 in a sliding fit manner.
The main function of the driving block 2 is to convert the axial movement of the driving block 2 into the radial movement of the first insert 11 and the second insert 12 by the cooperation with the first insert 11 and the second insert 12. Thereby enabling a switch between the first combination and the second combination.
In particular, the movement of the driving block 2 is controlled by a telescopic member 7. Specifically, the device also comprises a bracket 6 and a telescopic piece 7; the support 6 is fixedly arranged on the cover plate 5, one end of the telescopic piece 7 is fixedly connected with the support 6, and the other end of the telescopic piece 7 is fixedly connected with the driving block 2; the telescopic piece 7 is used for driving the driving block 2 to move along the axial direction of the through hole, and switching the first insert 11 and the second insert 12 between a first combination mode and a second combination mode. In particular, the telescopic member 7 may be a hydraulic cylinder or an air cylinder, or other structure capable of achieving a reciprocating movement. With the above arrangement, the driving block 2 can be moved up and down with respect to the bracket 6.
In the embodiment, in order to drive the first insert 11 and the second insert 12 to move radially by the up-and-down movement of the driving block 2, the present embodiment is further configured such that, specifically, the outer side of the first insert 11 and the outer side of the second insert 12 are both partial circumferential surfaces; in application, the first insert 11 and the second insert 12 can be spliced into a structure with a cylindrical surface on the outer peripheral side.
Referring to fig. 5 and 6, a first inclined surface 112 is disposed on the inner side of the first insert 11, and a first slider 113 is fixedly disposed on the first inclined surface 112. The inner side of the second insert 12 is provided with a second inclined plane 122, and a second slider 123 is fixedly arranged on the second inclined plane 122. In the first combination mode, the first inclined surface 112 and the second inclined surface 122 are matched to form the drawing hole 13;
the driving block 2 is provided with a third inclined plane 21 matched with the first inclined plane 112 and a fourth inclined plane 22 matched with the second inclined plane 122; the third inclined plane 21 is provided with a first chute 23 matched with the first sliding block 113, and the fourth inclined plane 22 is provided with a second chute 24 matched with the second sliding block 123; the first slider 113 and the second slider 123 are both T-shaped sliders. That is, the movement of the driving block 2 in the axial direction can be converted into the movement of the first insert 11 and the second insert 12 in the radial direction by the sliding engagement of the driving block 2 with the first insert 11 and the second insert 12, and the first inclined surface 112, the second inclined surface 122, the third inclined surface 21, and the fourth inclined surface 22.
In practice, further designs of the first insert 11 and the second insert 12 are still required in order to achieve the shrinkage between the first insert 11 and the second insert 12.
The first insert 11 becomes smaller in size in the circumferential direction of the core 1 in the inside-out direction; the second insert 12 becomes larger in size in the circumferential direction of the core 1 in the inside-out direction. With this design, in use, the second insert 12 is also able to retract inwardly as the first insert 11 is retracted inwardly. To accommodate this configuration, the first inclined surface 112 of the first insert 11 is slightly inclined to be greater than the second inclined surface 122 of the second insert 12. When the driving block 2 is pulled upwards, the first insert 11 moves radially at a slightly greater speed than the second insert 12. Thereby effecting shrinkage of the first insert 11 and the second insert 12.
In particular embodiments, the sides of the first and second inclined surfaces 112, 122 may be provided with chamfers or unfilled corner structures to avoid interference during shrinkage due to interference with the first and second inserts 11, 12.
In a specific implementation, the size of the first insert 11 in the circumferential direction of the core 1 becomes gradually smaller, and the size of the second insert 12 in the circumferential direction of the core 1 becomes gradually larger, in a direction away from the upper die 4. So set up, be convenient for when the installation, in order to install second insert 12 in place earlier, install first insert 11 in place again, compare in setting up first insert 11 and second insert 12 into the structure of upper and lower equidimension, the installation of more easily.
In the concrete implementation, the die further comprises a limiting ring 8, wherein the limiting ring 8 is fixedly arranged on the upper die 4, and the center line of an inner hole of the limiting ring 8 coincides with the center line of the through hole. The function of the stop collar 8 is mainly to limit the axial movement of the first insert 11 and the second insert 12. So that the first insert 11 and the second insert 12 remain axially positioned, either in the first combination or in the second combination.
Specifically, the limiting ring 8 is provided with a plurality of third sliding grooves 81 along the radial direction; one side of the limiting ring 8 is propped against the cover plate 5, and a sliding hole is formed by the third sliding groove 81; the axial direction of the sliding hole is perpendicular to the central line direction of the limiting ring 8.
The outer side of one end of the first insert 11 close to the upper die 4 and the outer side of one end of the second insert 12 close to the upper die 4 are respectively provided with a guide slide block 9; the guide slide block 9 is connected with the corresponding slide hole in a sliding fit manner. By the above arrangement, the retainer ring 8 can restrict the axial movement of the first insert 11 and the second insert 12 without restricting the radial movement of the first insert 11 and the second insert 12.
In a specific implementation, a limiting block 10 is arranged on one side surface of the driving block 2. The limiting block 10 is used for limiting the limiting position of the axial downward movement of the driving block 2, so as to avoid the problem that the axial downward movement of the driving block 2 is excessively large, and a gap is generated between the first insert 11 and the second insert 12 or a cylindrical surface cannot be formed due to excessive outward movement of the first insert 11 and the second insert 12.
In practice, more convenient demolding is considered. The cover plate 5 is provided with a cold water pipeline 51, and the cold water pipeline 51 is communicated with the drawing hole 13. In a specific implementation, cold water is added into the cold water pipeline 51 to cool, so that the driving block 2, the first insert 11 and the second insert 12 can be cooled earlier than a product, the volumes of the first insert 11 and the second insert 12 are reduced and separated from the product, the driving block can be pumped upwards more easily, and the first insert 11 and the second insert 12 can be retracted and separated conveniently.
In specific implementation, the present embodiment is realized by the following procedure.
When in assembly, the cover plate 5 is sleeved on the driving block 2, then the second insert 12, the driving block 2 and the sliding mode are assembled together, and then the needle head one insert 11 is slidably arranged on the corresponding side surface of the driving block 2; the first insert 11, the second insert 12 and the driving block 2 penetrate through the inner hole of the limiting ring 8 and the through hole on the upper die 4, the guide sliding block 9 is positioned in the corresponding third sliding groove 81, the limiting ring 8 is fixedly connected with the upper die 4, the cover plate 5 is fixedly connected with the limiting ring 8, the support 6 is fixedly installed on the cover plate 5 or the upper die 4, two ends of the telescopic piece 7 are fixedly connected with the upper ends of the support 6 and the driving block 2 respectively, and the telescopic direction of the telescopic piece 7 is kept consistent with the axial direction of the driving block 2.
When in use, the driving block 2 is pulled upwards, so that the combination mode of the first insert 11 and the second insert 12 is a second combination mode. The upper die 4 and the lower die 3 are clamped, and the lower end of the die core 1 formed by combining the first insert 11 and the second insert 12 is positioned in a circular groove on the lower die 3. Then the driving block 2 is pushed downwards to enable the first insert 11 and the second insert 12 to move outwards until the first insert 11 and the second insert 12 are limited by the corresponding first positioning block 31 and the second positioning block 32.
Through the above process, the upper die 4 can be mated with the lower die 3, and then casting can be performed. After the product is molded, cold water is injected into the cold water hole 51 so that the first insert 11 and the second insert 12 are cooled earlier than the product, and a minute gap is generated due to shrinkage of the first insert 11 and the second insert 12 after cooling. At this time, the driving block 2 is pulled upwards to enable the first insert 11 and the second insert 12 to shrink inwards, so that the first insert 11 and the second insert 12 are separated from the inner hole wall of the product, and the first insert 11 and the second insert 12 can be taken out after the upper die 4 is lifted.
In the case of example 2,
this embodiment is a further improvement on the basis of embodiment 1, and the same points are not described in detail, and only the differences are improved below. That is, this embodiment proposes a technical solution different from embodiment 1 on the basis of embodiment 1.
Specifically, referring to fig. 9 and 10, the dashed line in fig. 10 is a cylindrical surface formed in the first combination manner.
The difference between this embodiment and embodiment 1 is mainly that: in this embodiment, the first insert 11 may be made smaller in size in the circumferential direction than the second insert 12, and the first positioning groove 111 on the first insert 11 may be eliminated.
Since the first insert 11 becomes larger in size in the circumferential direction in the radially inward direction, positioning can be performed by the second inserts 12 on both sides during the opening.
According to the embodiment of the invention, the thickness of the machining allowance at the inner hole of the product can be controlled below 1.5mm, and the material consumption and the machining CT period are reduced. When the aluminum alloy motor shell product is applied to the aluminum alloy motor shell product, the material loss of the aluminum alloy motor shell product in casting production can be reduced, the machining allowance of an inner hole is reduced by about 70%, the material consumption cost is saved, the CT period for machining the inner hole of the motor shell is reduced by about 40%, and the labor cost is saved.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (8)
1. A die core-pulling structure is characterized by comprising,
at least two first inserts (11);
-at least two second inserts (12), said second inserts (12) having with said first inserts (11) at least two combined conditions:
first combination mode: the first insert (11) and the second insert (12) are spliced into a mold core (1) with a cylindrical surface on the periphery, and a drawing hole (13) is formed in the mold core (1);
the second combination mode is as follows: the first insert (11) and the second insert (12) shrink inwards, and the outer contours of the first insert and the second insert are contained in the corresponding cylindrical surfaces of the mold cores (1) in a first combination mode;
the driving block (2), the driving block (2) is in sliding connection with the first insert (11) and the second insert (12), the driving block (2) is arranged in a sliding manner, and one end of the driving block is positioned in the drawing hole (13); to effect switching between the first and second combination modes by axial movement of the drive block (2); the outer side of the first insert (11) and the outer side of the second insert (12) are both partial cylindrical surfaces;
a first inclined plane (112) is arranged on the inner side of the first insert (11), and a first sliding block (113) is fixedly arranged on the first inclined plane (112);
a second inclined plane (122) is arranged on the inner side of the second insert (12), and a second sliding block (123) is fixedly arranged on the second inclined plane (122);
in a first combination mode, the first inclined surface (112) and the second inclined surface (122) are matched to form the drawing hole (13);
a third inclined plane (21) matched with the first inclined plane (112) and a fourth inclined plane (22) matched with the second inclined plane (122) are arranged on the driving block (2); the third inclined surface (21) is provided with a first chute (23) matched with the first sliding block (113), and the fourth inclined surface (22) is provided with a second chute (24) matched with the second sliding block (123); the first sliding block (113) and the second sliding block (123) are both T-shaped sliding blocks; the first insert (11) tapers in size in the circumferential direction of the core (1) in an inside-out direction;
the second insert (12) becomes progressively larger in size in the circumferential direction of the core (1) in the inside-out direction.
2. The mold core-pulling structure according to claim 1, further comprising a lower mold (3);
a first positioning block (31) and a second positioning block (32) are arranged on the lower die (3);
one end of the first insert (11) is provided with a first positioning groove (111), and one end of the second insert (12) is provided with a second positioning groove (121); the first positioning groove (111) is used for being matched with the first positioning block (31), the second positioning groove (121) is used for being matched with the second positioning block (32) so as to be matched with the driving block (2) to match the first insert (11) with the second insert (12) in a first combination mode.
3. The mold core pulling structure according to claim 2, further comprising an upper mold (4) and a cover plate (5), wherein a through hole is provided on the upper mold (4);
the cover plate (5) is annular and is arranged at the top of the upper die (4); the inner hole of the cover plate (5) coincides with the center line of the through hole;
the driving block (2) passes through the through hole and is connected with the first insert (11) and the second insert (12) in a sliding fit manner.
4. A mould core-pulling structure according to claim 3, further comprising a bracket (6) and a telescopic member (7);
the support (6) is fixedly arranged on the cover plate (5), one end of the telescopic piece (7) is fixedly connected with the support (6), and the other end of the telescopic piece (7) is fixedly connected with the driving block (2);
the telescopic piece (7) is used for driving the driving block (2) to move along the axial direction of the through hole, and the first insert (11) and the second insert (12) are switched between a first combination mode and a second combination mode.
5. A mold core pulling structure according to claim 3, wherein the first insert (11) becomes smaller in size in the circumferential direction of the core (1) and the second insert (12) becomes larger in size in the circumferential direction of the core (1) in a direction away from the upper die (4).
6. The core-pulling structure of a mold according to any one of claims 3 to 5, further comprising a retainer ring (8), wherein the retainer ring (8) is fixedly mounted on the upper mold (4), and a center line of an inner hole of the retainer ring (8) coincides with a center line of the through hole;
the limiting ring (8) is provided with a plurality of third sliding grooves (81) along the radial direction; one side of the limiting ring (8) is propped against the cover plate (5), and a sliding hole is formed by the third sliding groove (81);
the outer side of one end of the first insert (11) close to the upper die (4) and the outer side of one end of the second insert (12) close to the upper die (4) are both provided with guide sliding blocks (9);
the guide sliding block (9) is connected with the corresponding sliding hole in a sliding fit manner.
7. A mould core-pulling structure according to any one of claims 3 to 5, wherein a limiting block (10) is provided on one side of the driving block (2).
8. The core pulling structure of a mold according to claim 6, wherein a cold water pipe (51) is provided on the cover plate (5), and the cold water pipe (51) is communicated with the drawing hole (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310708472.1A CN116727608B (en) | 2023-06-15 | 2023-06-15 | Mould core-pulling structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310708472.1A CN116727608B (en) | 2023-06-15 | 2023-06-15 | Mould core-pulling structure |
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| CN116727608A CN116727608A (en) | 2023-09-12 |
| CN116727608B true CN116727608B (en) | 2024-02-13 |
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| CN216708225U (en) * | 2022-01-29 | 2022-06-10 | 宁波乔士模具科技有限公司 | Demoulding structure of automobile oil can cover mould |
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| CN204487986U (en) * | 2015-03-14 | 2015-07-22 | 台州市黄岩技佳模具有限公司 | Flared pipe fitting core-pulling mechanism for injection mold |
| CN104985725A (en) * | 2015-08-13 | 2015-10-21 | 陈小初 | Lead type inwards-contracting core pulling core structure |
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| CN212666596U (en) * | 2020-05-09 | 2021-03-09 | 博格菲尔机电科技(昆山)有限公司 | Internal shrinking mechanism for plastic forming die |
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| CN116727608A (en) | 2023-09-12 |
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