CN218429730U - Inclined top internal time-delay side core-pulling die - Google Patents
Inclined top internal time-delay side core-pulling die Download PDFInfo
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- CN218429730U CN218429730U CN202222732556.2U CN202222732556U CN218429730U CN 218429730 U CN218429730 U CN 218429730U CN 202222732556 U CN202222732556 U CN 202222732556U CN 218429730 U CN218429730 U CN 218429730U
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Abstract
The utility model discloses an inclined top internal time-delay side core-pulling die, which comprises a front die, a front die core, a rear die core, a top plate, an inclined ejector rod, a delay core-pulling piece and an elastic piece; a first vertical surface and a first inclined surface are arranged on one side surface of the inclined top hole, which is far away from the cavity, the first inclined surface is connected with one end of the first vertical surface, which is far away from the top plate, and one end of the first inclined surface, which is far away from the first vertical surface, is inclined towards the direction far away from the inclined top rod; the delay core-pulling piece is arranged on the inclined mandril in a sliding way, and one end of the delay core-pulling piece extends into the cavity; two ends of the elastic piece respectively abut against the delay core pulling piece and the inclined mandril; when the mold is opened, one end of the delayed core pulling piece, which is far away from the cavity, is abutted against the first vertical surface and the first inclined surface successively. The core pulling die with the delay side in the pitched roof utilizes the first vertical surface and the first inclined surface which are connected in the pitched roof hole to enable the delay core pulling element to have certain lag time when the die is opened, so that core pulling is performed on the concave part on the injection molding product step by step, and the phenomenon that the convex part of the injection molding product is bent or even broken due to the fact that the convex part bears large pulling force can be prevented.
Description
Technical Field
The utility model relates to the technical field of mold, especially, relate to oblique top inside time delay side loose core mould.
Background
The existing plastic injection products generally need to be injection molded through an injection mold, and the injection molding refers to a method of heating resin to a molten state, injecting the resin into a mold with a required shape at a high speed and a high pressure, cooling, and opening the mold to obtain a molded product. Some lid-shaped injection molding products (as shown in fig. 1) have a plurality of protrusions 91 arranged at intervals, in order to enable smooth demolding of the protrusions 91, ejector rods are often arranged at the positions, if a concave structure is arranged on the opposite surface between the protrusions 91, an oblique ejector rod is used for assisting demolding, and the oblique ejector rod can be separated from the protrusions 91 in the ejection process, so that demolding of the concave structure on the protrusions 91 is realized. However, the contact area between the protrusion and the lifter bar is increased due to the recessed structure, so that the entire protrusion 91 has a large tightening force on the lifter bar, and if the lifter bar is separated from the protrusion 91 at one time, the protrusion 91 is easily subjected to an excessive force and is bent and deformed, or even broken.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: and providing an inclined top internal delay side core-pulling mould.
In order to solve the technical problem, the utility model discloses a technical scheme be: the inclined top internal time-delay side core-pulling die comprises a front die, a front die core, a rear die core, a top plate, an inclined ejector rod, a delay core-pulling piece and an elastic piece, wherein one end of the inclined ejector rod is connected with the top plate in a sliding manner, an inclined ejector hole for the inclined ejector rod to penetrate through is formed in the rear die core, and the other ends of the front die core, the rear die core and the inclined ejector rod jointly form a die cavity; a first vertical surface and a first inclined surface are arranged on one side surface of the inclined top hole, which is far away from the cavity, the first inclined surface is connected with one end of the first vertical surface, which is far away from the top plate, and one end of the first inclined surface, which is far away from the first vertical surface, is inclined towards the direction far away from the inclined top rod; the delayed core-pulling piece is arranged on the inclined ejector rod in a sliding manner, and one end of the delayed core-pulling piece extends into the cavity; two ends of the elastic piece respectively abut against the delay core pulling piece and the inclined mandril so as to enable the delay core pulling piece to move towards the direction far away from the cavity; when the mold is opened, one end of the delayed core pulling piece, which is far away from the mold cavity, is successively abutted against the first vertical surface and the first inclined surface.
Furthermore, the number of the delay core-pulling pieces is a plurality, and the delay core-pulling pieces are arranged on the inclined ejector rod in a sliding manner at intervals.
Furthermore, a second inclined plane and a second vertical plane are arranged at one end, far away from the cavity, of the delay core-pulling piece, the second vertical plane is connected with one end, far away from the top plate, of the second inclined plane, and the second inclined plane is parallel to the first inclined plane.
Further, still include the shutoff piece, be equipped with the mounting hole on the ejector pin to one side, postpone to take out the core piece and run through the mounting hole, the shutoff piece can be dismantled with the ejector pin to one side and be connected and seal the mounting hole, be equipped with on the shutoff piece and supply the through-hole that the part of loosing core of postponing passed.
Further, still include the retaining member, be equipped with the connecting hole on the shutoff piece, the retaining member passes the connecting hole with the connection can be dismantled to the oblique ejector pin.
Furthermore, be equipped with external screw thread portion on the retaining member, be equipped with on the oblique ejector pin with external screw thread portion complex screw hole.
Furthermore, the oblique ejector rod is provided with a mounting groove for accommodating the plugging piece, and the bottom surface of the mounting groove is provided with the threaded hole and the mounting hole.
Furthermore, the connecting hole is a counter bore.
Furthermore, a convex limiting boss is arranged on the delay core-pulling piece.
Furthermore, the elastic piece is a spring, a spring sheet or an elastic cushion.
The beneficial effects of the utility model reside in that: the core-pulling die with the time-delay side in the pitched roof utilizes the first vertical surface and the first inclined surface which are connected in the pitched roof hole to be respectively in sliding contact with the delay core-pulling element, so that the delay core-pulling element can firstly pass through a certain lag time when the die is opened and then slides relative to an injection product in a cavity, and the core-pulling die is matched with the pitched roof rod to perform core-pulling on a concave part on the injection product step by step, and can effectively prevent a convex part of the injection product from bearing large pulling force and being bent or even broken.
Drawings
Fig. 1 is a schematic structural view of an injection molding product of an inclined top internal delay side core-pulling mold according to a first embodiment of the present invention;
fig. 2 is a cross-sectional view of the lifter internal delay side core-pulling mold according to the first embodiment of the present invention;
FIG. 3 is an enlarged detail view of portion A of FIG. 2;
fig. 4 is an exploded view of a part of the structure of the mold for pulling core on the inner delay side of the lifter according to the first embodiment of the present invention.
Description of reference numerals:
1. a front mold core;
2. a rear mold core; 21. a first vertical surface; 22. a first inclined plane;
3. a top plate;
4. an oblique ejector rod; 41. mounting grooves; 411. mounting holes; 412. a threaded hole;
5. delaying core piece drawing; 51. a second inclined plane; 52. a second vertical surface; 53. a limiting boss;
6. an elastic member;
7. a blocking member;
8. a locking member;
9. injection molding a product; 91. a projection.
Detailed Description
In order to explain the technical contents, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 2 to 4, the oblique-ejection internal delay side core-pulling mold comprises a front mold, a front mold core 1, a rear mold core 2, a top plate 3, an oblique ejector rod 4, a delay core-pulling piece 5 and an elastic piece 6, wherein one end of the oblique ejector rod 4 is slidably connected with the top plate 3, an oblique ejection hole for the oblique ejector rod 4 to penetrate through is formed in the rear mold core 2, and the other ends of the front mold core 1, the rear mold core 2 and the oblique ejector rod 4 jointly enclose a cavity; a first vertical surface 21 and a first inclined surface 22 are arranged on one side surface of the inclined top hole, which is far away from the cavity, the first inclined surface 22 is connected with one end, which is far away from the top plate 3, of the first vertical surface 21, and one end, which is far away from the first vertical surface 21, of the first inclined surface 22 inclines towards the direction far away from the inclined top rod 4; the delay core-pulling piece 5 is arranged on the inclined mandril 4 in a sliding way, and one end of the delay core-pulling piece extends into the cavity; two ends of the elastic piece 6 respectively abut against the delayed core pulling piece 5 and the inclined mandril 4 so as to enable the delayed core pulling piece 5 to move towards the direction away from the cavity; when the mold is opened, one end of the delayed core-pulling piece 5 far away from the cavity successively butts against the first vertical surface 21 and the first inclined surface 22.
The utility model discloses a structural principle brief follows as follows: when the die is closed, a partial region of the inclined ejector rod 4 and one end of the delay core-pulling piece 5 extend into the die cavity so as to form a concave structure on the convex part 91, and the other end of the delay core-pulling piece 5 is abutted against the first vertical surface 21; in the early stage of the mold opening process, the inclined ejector rod 4 slides relative to the injection product 9 to complete the first core pulling action, and in the process, one end, far away from the cavity, of the delayed core pulling piece 5 is always in relative sliding contact with the first vertical surface 21, so that the delayed core pulling piece 5 does not move relative to the cavity, and the protruding part 91 of the injection product 9 is supported by the supporting force from the delayed core pulling piece 5 to resist the pulling force applied by the inclined ejector rod 4; at the later stage of the mold opening process, one end, far away from the cavity, of the delayed core pulling piece 5 is in relative sliding collision with the first inclined surface 22, the delayed core pulling assembly moves towards the direction far away from the injection product 9 under the pushing of the elastic piece 6 until the delayed core pulling assembly is completely separated from the injection product 9, the secondary core pulling structure is completed, and then the injection product 9 can fall off from the mold.
From the above description, the beneficial effects of the present invention are: according to the core-pulling die for the delay side in the pitched roof, the first vertical surface 21 and the first inclined surface 22 which are connected in the pitched roof hole are respectively in slidable contact with the delay core-pulling element 5, so that the delay core-pulling element 5 can firstly pass through a certain lag time during die opening and then slide relative to the injection product 9 in a cavity, and the core-pulling die is matched with the pitched roof rod 4 to perform core-pulling on the concave part of the injection product 9 step by step, and the convex part 91 of the injection product 9 can be effectively prevented from being bent or even broken due to the fact that the convex part bears large pulling force.
Furthermore, the number of the delayed core-pulling pieces 5 is several, and several of the delayed core-pulling pieces 5 are slidably arranged on the oblique mandril 4 at intervals.
Further, one end of the delay core member 5 away from the cavity is provided with a second inclined surface 51 and a second vertical surface 52, the second vertical surface 52 connects one end of the second inclined surface 51 away from the top plate 3, and the second inclined surface 51 is parallel to the first inclined surface 22.
As can be seen from the above description, in the mold opening process, the delayed core pulling assembly sequentially utilizes the second vertical surface 52 and the second inclined surface 51 to make slidable surface contact with the first vertical surface 21 and the first inclined surface 22 of the slanted ejecting hole, which is beneficial to reducing the wear on the first inclined surface 22, the first vertical surface 21 and the delayed core pulling element 5, improving the service life of the mold, and reducing the maintenance frequency.
Further, the device also comprises a plugging piece 7, wherein a mounting hole 411 is formed in the oblique ejector rod 4, the delayed core piece 5 penetrates through the mounting hole 411, the plugging piece 7 is detachably connected with the oblique ejector rod 4 and seals the mounting hole 411, and a through hole for the delayed core piece 5 to penetrate through is formed in the plugging piece 7.
As can be seen from the above description, the delay core member 5 can be disposed inside the lifter bar 4, which is beneficial to reduce the occupied space, thereby reducing the overall size of the mold.
Furthermore, still include retaining member 8, be equipped with the connecting hole on the shutoff piece 7, retaining member 8 passes the connecting hole with the connection can be dismantled to oblique ejector pin 4.
Furthermore, the locking member 8 is provided with an external thread portion, and the oblique mandril 4 is provided with a threaded hole 412 matched with the external thread portion.
As can be seen from the above description, the manner of assembling the closing member 7 is simple and convenient.
Further, the inclined ejector rod 4 is provided with a mounting groove 41 for accommodating the blocking piece 7, and the bottom surface of the mounting groove 41 is provided with the threaded hole 412 and the mounting hole 411.
Furthermore, the connecting hole is a counter bore.
From the above description, it can be known that, the installation groove 41 is formed on the oblique ejector rod 4, so that the occupied space of the plugging piece 7 can be reduced, the connection hole is formed as a counter-sunk hole, so that the occupied space of the locking piece 8 can be reduced, the internal structure of the die is more compact, and the whole size is smaller.
Further, a protruding limit boss 53 is arranged on the delay core-pulling piece 5.
As can be seen from the above description, the limit boss 53 can limit the sliding stroke of the delayed core-pulling piece 5, and prevent the delayed core-pulling piece 5 from accidentally disengaging from the lifter bar 4.
Furthermore, the elastic member 6 is a spring, a spring plate or a spring pad.
As can be seen from the above description, the designer can select different kinds of elastic members 6 according to the actual use situation.
Example one
Referring to fig. 2 to 4, a first embodiment of the present invention is: the core-pulling die comprises a front die, a front die core 1, a rear die core 2, a top plate 3, an inclined ejector rod 4, a delay core-pulling piece 5 and an elastic piece 6, wherein the front die core 1 is fixedly arranged on one surface of the front die, which is close to the rear die, the rear die core 2 is fixedly arranged on one surface of the rear die, which is close to the front die, and the top plate 3 can slide relative to the rear die; a slidable connecting block is arranged on the top plate 3, a rotating groove is arranged on the connecting block, the cross section of the rotating groove is arc-shaped, and one end of the oblique ejector rod 4 is provided with a cylindrical fixture block matched with the rotating groove so that the oblique ejector rod 4 is in sliding connection with the top plate 3; the rear mold core 2 is provided with an inclined top hole for the inclined top rod 4 to penetrate through, and the other ends of the front mold core 1, the rear mold core 2 and the inclined top rod 4 jointly enclose a cavity; a first vertical surface 21 and a first inclined surface 22 are arranged on one side surface of the inclined top hole, which is far away from the cavity, the first inclined surface 22 is connected with one end of the first vertical surface 21, which is far away from the top plate 3, and one end of the first inclined surface 22, which is far away from the first vertical surface 21, is inclined towards the direction far away from the inclined top rod 4; the delay core-pulling piece 5 is arranged on the inclined mandril 4 in a sliding way, and one end of the delay core-pulling piece extends into the cavity; two ends of the elastic piece 6 respectively abut against the delayed core pulling piece 5 and the inclined mandril 4 so as to enable the delayed core pulling piece 5 to move towards the direction away from the cavity; when the mold is opened, one end of the delayed core-pulling piece 5 far away from the cavity successively butts against the first vertical surface 21 and the first inclined surface 22. Specifically, the injection molding product 9 of the present embodiment has two protrusions 91, the opposite surfaces of the two protrusions 91 are respectively provided with a recessed structure, each protrusion 91 is correspondingly provided with an oblique top rod 4, and one end of the oblique top rod 4 away from the top plate 3 inclines towards the inside. The mold described in this embodiment is a one-mold one-cavity layout, and the casting mode is a cold runner submarine type. Two sides of the rear mould are respectively provided with a pressure lever, and one end of the pressure lever is rotatably connected with the rear mould; two sides of the front die are respectively provided with a straight rod corresponding to the pressure rod, and the length direction of the straight rod is parallel to the die opening and closing direction; two sides of the top plate 3 are correspondingly provided with a pressing block corresponding to the pressing rod respectively, and the pressing block is arranged on one side of the pressing rod far away from the front die. During die assembly, one end of the straight rod, far away from the front die, abuts against the pressure rod, the pressure rod is driven to rotate and abuts against the pressing block, and therefore the top plate 3 is driven to slide and reset relative to the rear die.
Preferably, as shown in fig. 4, the number of the delayed core pieces 5 is several, and several of the delayed core pieces 5 are slidably provided on the lifter 4 at intervals. In the embodiment, each inclined ejector rod 4 is respectively provided with two delay core pulling pieces 5; the number of the delay core pieces 5 is provided in one-to-one correspondence with the number of the elastic pieces 6.
Preferably, as shown in fig. 2 and 4, the end of the delayed core member 5 away from the cavity is provided with a second inclined surface 51 and a second vertical surface 52, the second vertical surface 52 connects the end of the second inclined surface 51 away from the top plate 3, and the second inclined surface 51 is parallel to the first inclined surface 22. It is easy to understand that in the early stage of the mold opening process, the injection product 9 and the delayed core-pulling piece 5 move towards the inclined ejector rod 4, at this time, the second vertical surface 52 of the delayed core-pulling piece 5 is in sliding interference with the first vertical surface 21 in the inclined ejector hole, and the delayed core-pulling piece 5 does not move relative to the injection product 9; at the later stage of the mold opening process, the second vertical surface 52 of the delayed core-pulling piece 5 is in sliding contact with the first vertical surface 21 in the slanted top hole, instead of the second inclined surface 51 of the delayed core-pulling piece 5 is in sliding contact with the first inclined surface 22 in the slanted top hole, and the delayed core-pulling piece 5 is slidable relative to the injection product 9 in the direction perpendicular to the mold opening and closing direction, and is thus separated from the injection product 9 under the driving of the elastic force of the elastic piece 6.
Preferably, as shown in fig. 2 and 4, the mold for pulling core on the inner delayed side of the slanted ejecting further includes a blocking piece 7, a mounting hole 411 is formed in the slanted ejecting rod 4, the delayed core pulling piece 5 penetrates through the mounting hole 411, the blocking piece 7 is detachably connected with the slanted ejecting rod 4 and seals the mounting hole 411, and a through hole for the delayed core pulling piece 5 to pass through is formed in the blocking piece 7. Specifically, one end of the delayed core pulling piece 5, which is far away from the cavity, penetrates through the through hole, the cross section of the end is rectangular, and the end is matched with the through hole to prevent the delayed core pulling piece 5 from rotating, so that the size precision of the injection molding product 9 is improved.
Preferably, as shown in fig. 4, the core-pulling mold for the inner delayed side of the inclined top further comprises a locking member 8, a connecting hole is formed in the blocking member 7, and the locking member 8 penetrates through the connecting hole and is detachably connected with the inclined top rod 4. The locking member 8 is provided with an external thread portion, and the oblique mandril 4 is provided with a threaded hole 412 matched with the external thread portion. In this embodiment, the retaining member 8 is preferably a bolt; the connecting hole is a counter bore. The number of the locking pieces 8 is two, and two locking pieces 8 are provided between the two delayed core pieces 5.
Preferably, as shown in fig. 4, in order to reduce the occupied space of the blocking piece 7, a mounting groove 41 for accommodating the blocking piece 7 is formed on the inclined push rod 4, and the bottom surface of the mounting groove 41 is provided with the threaded hole 412 and the mounting hole 411.
Preferably, as shown in fig. 2 and 4, the delayed core piece 5 is provided with a protruding limit boss 53. Specifically, the limiting boss 53 is annular, and the outer diameter of the limiting boss 53 is larger than the maximum width of the through hole.
Optionally, the elastic element 6 is a spring, a spring plate or an elastic pad. As shown in fig. 4, in the present embodiment, the elastic member 6 is provided as a spring; the elastic piece 6 is sleeved on the delay core-pulling piece 5.
To sum up, the utility model provides an inside time delay side loose core mould in oblique top utilizes in the oblique top hole continuous first perpendicular and first inclined plane respectively with postpone take out the slidable conflict of chipware for postpone take out the chipware and can pass through certain lag time earlier when the die sinking, just slide for the injection moulding product in the die cavity afterwards, thereby cooperation lifter carries out the substep to the depressed part on the injection moulding product and looses core, can effectively prevent that injection moulding product's bulge from bearing great pulling force and crooked even by the rupture. The second vertical surface and the second inclined surface are arranged at one end, far away from the cavity, of the delay core pulling element, so that abrasion of the first inclined surface, the first vertical surface and the delay core pulling element can be reduced, the service life of the die is prolonged, and the maintenance frequency is reduced.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. Push up inside time delay side loose core mould to one side, including front mould, preceding mold core, back mould, back mold core and roof, its characterized in that: the mold comprises a front mold core, a rear mold core and an inclined ejector rod, and is characterized by further comprising an inclined ejector rod, a delayed core pulling piece and an elastic piece, wherein one end of the inclined ejector rod is connected with the top plate in a sliding mode, an inclined ejector hole for the inclined ejector rod to penetrate through is formed in the rear mold core, and a cavity is formed by the other ends of the front mold core, the rear mold core and the inclined ejector rod; a first vertical surface and a first inclined surface are arranged on one side surface of the inclined top hole, which is far away from the cavity, the first inclined surface is connected with one end of the first vertical surface, which is far away from the top plate, and one end of the first inclined surface, which is far away from the first vertical surface, is inclined towards the direction far away from the inclined top rod; the delayed core-pulling piece is arranged on the inclined ejector rod in a sliding manner, and one end of the delayed core-pulling piece extends into the cavity; two ends of the elastic piece respectively abut against the delay core pulling piece and the inclined ejector rod so that the delay core pulling piece moves towards the direction away from the cavity; when the mold is opened, one end of the delayed core pulling piece, which is far away from the cavity, is abutted against the first vertical surface and the first inclined surface successively.
2. The angle ejector internal delay side core pulling mold according to claim 1, characterized in that: the number of the delayed core-pulling pieces is a plurality, and the delayed core-pulling pieces are arranged on the inclined ejector rod in a sliding manner at intervals.
3. The angle ejector internal delay side core pulling mold according to claim 1, characterized in that: and one end of the delay core-pulling piece, which is far away from the cavity, is provided with a second inclined plane and a second vertical plane, the second vertical plane is connected with one end of the second inclined plane, which is far away from the top plate, and the second inclined plane is parallel to the first inclined plane.
4. The angle ejector internal delay side core pulling mold according to claim 1, characterized in that: the device is characterized by further comprising a plugging piece, wherein a mounting hole is formed in the oblique ejector rod, the delayed core pulling piece penetrates through the mounting hole, the plugging piece is detachably connected with the oblique ejector rod and seals the mounting hole, and a through hole for the delayed core pulling piece to penetrate through is formed in the plugging piece.
5. The inside time delay side loose core mould of pitched roof of claim 4, characterized in that: still include the retaining member, be equipped with the connecting hole on the shutoff piece, the retaining member passes the connecting hole with the connection can be dismantled to the oblique ejector pin.
6. The inside time delay side loose core mould of oblique top of claim 5, characterized in that: the locking piece is provided with an external thread part, and the oblique ejector rod is provided with a threaded hole matched with the external thread part.
7. The angle ejector internal delay side core pulling mold according to claim 6, wherein: the oblique ejector rod is provided with a mounting groove for accommodating the plugging piece, and the bottom surface of the mounting groove is provided with the threaded hole and the mounting hole.
8. The inside time delay side loose core mould of pitched roof of claim 5, characterized in that: the connecting hole is a counter bore.
9. The inside time delay side loose core mould of pitched roof of claim 4, characterized in that: and the delay core-pulling piece is provided with a convex limiting boss.
10. The inside time delay side loose core mould of oblique top of claim 1, characterized in that: the elastic piece is a spring, a spring sheet or an elastic cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222732556.2U CN218429730U (en) | 2022-10-17 | 2022-10-17 | Inclined top internal time-delay side core-pulling die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222732556.2U CN218429730U (en) | 2022-10-17 | 2022-10-17 | Inclined top internal time-delay side core-pulling die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218429730U true CN218429730U (en) | 2023-02-03 |
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ID=85068066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222732556.2U Active CN218429730U (en) | 2022-10-17 | 2022-10-17 | Inclined top internal time-delay side core-pulling die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218429730U (en) |
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2022
- 2022-10-17 CN CN202222732556.2U patent/CN218429730U/en active Active
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