CN109622918B - Injection molding die and molding method for zinc-based alloy pipe - Google Patents
Injection molding die and molding method for zinc-based alloy pipe Download PDFInfo
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- CN109622918B CN109622918B CN201811592026.4A CN201811592026A CN109622918B CN 109622918 B CN109622918 B CN 109622918B CN 201811592026 A CN201811592026 A CN 201811592026A CN 109622918 B CN109622918 B CN 109622918B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides an injection molding die and a molding method of a zinc-based alloy pipe, wherein the molding die comprises a pouring ladle, a fixed template, a core seat for installing the core, a crystallizer, a movable pulling plate and a syringe with a hollow structure inside, wherein one end of the syringe is provided with a nozzle communicated with the inner cavity of the syringe, the inner side of the other end of the syringe is connected with a screw rod in a threaded manner, the pouring ladle is arranged at the top of the syringe, the liquid outlet of the pouring ladle is communicated with the inner cavity of the syringe, the nozzle is columnar, the outer side of the nozzle is sequentially sleeved with the fixed template and the core along the direction far away from the syringe, and an extrusion cavity is arranged inside the core at the outlet of the nozzle and is communicated with the cavity through a plurality of die openings.
Description
Technical Field
The invention belongs to the technical field of metal forming dies, and particularly relates to an injection forming die and a forming method of a zinc-based alloy tube.
Background
The high aluminum zinc alloy has been successfully applied to the preparation of antifriction and wear-resistant products such as alloy pipes, shaft sleeves, bearing bushes and the like by virtue of excellent antifriction and wear resistance and higher mechanical properties. However, due to the inherent characteristics of the high-aluminum zinc alloy, the defects of component segregation, shrinkage cavity and the like easily occur when the high-aluminum zinc alloy pipe is produced by adopting a conventional casting method, so that the problems of stress concentration, crack and the like easily occur in the service process of the high-aluminum zinc alloy pipe, and the mechanical property and the service life of the high-aluminum zinc alloy pipe are greatly influenced.
Disclosure of Invention
The invention aims to provide an injection molding die and a molding method of a zinc-based alloy pipe, which are used for solving the problems of shrinkage cavity, shrinkage porosity, uneven components and the like in the production of the zinc-based alloy pipe by the conventional casting method commonly adopted at present, and improving the mechanical property and the service performance of the zinc-based alloy pipe.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides an injection moulding mould of zinc base alloy pipe, is including the middle water ladle that is used for accepting liquid zinc alloy, fixed bolster, core, the core seat that is used for installing the core, crystallizer, remove the pulling plate and inside be hollow structure's injection tube, the liquid outlet department of middle water ladle is provided with the sliding gate that is used for controlling liquid zinc alloy velocity of flow and flow, the injection nozzle that is linked together with the inner chamber of injection tube is installed to one of them end of injection tube, the other end inboard threaded connection of injection tube has the screw rod, the middle water ladle is installed at the top of injection tube and the liquid outlet of middle water ladle is linked together with the inner chamber of injection tube, the injection nozzle is columnar and the outside of injection nozzle is equipped with along the direction of keeping away from the injection tube in proper order the cover fixed bolster and the core, the outside of core is provided with extrusion chamber in proper order along the direction of keeping away from the fixed bolster the core seat and crystallizer, one side that the crystallizer is provided with the removal pulling plate, core, crystallizer, core seat and moving plate are linked together into the inner chamber that is used for liquid zinc alloy shaping is still offered with a plurality of extrusion die cavity and extrusion die cavity are linked together.
Further, a resistance preheater for heating the injection cylinder is arranged on the outer side of the injection cylinder.
Furthermore, a dovetail groove is formed in one end, close to the crystallizer, of the movable traction plate.
Further, the movable traction plate is further provided with a sealing groove communicated with the dovetail groove at the inner side of the dovetail groove, and one end, far away from the fixed template, of the core is matched with the sealing groove.
Further, one end of the movable traction plate, which is far away from the crystallizer, is connected with a hydraulic machine.
Further, the mounting groove is formed in one end, close to the fixed die plate, of the core seat, and the clamping seat matched with the mounting groove is integrally formed in one end, close to the fixed die plate, of the core.
Further, the core print seat is connected with the fixed template through bolts.
Further, the extrusion cavity is conical, the central axis of the extrusion cavity coincides with the central axis of the injection nozzle, and the injection nozzle penetrates into the extrusion cavity from the vertex of the conical structure.
A molding method for preparing a zinc-based alloy pipe by adopting an injection molding die of the zinc-based alloy pipe comprises the following steps:
step one: heating the injection cylinder and the screw to 200-220 ℃ through a resistance preheater arranged outside the injection cylinder, and preserving heat for 50-60 minutes at 200-220 ℃;
step two: pouring the liquid zinc alloy into a pouring ladle when the liquid zinc alloy is heated to 530-550 ℃, and opening a sliding water gap arranged below the pouring ladle when the liquid zinc alloy is heated to 510-520 ℃ to enable the liquid zinc alloy to enter the inner cavity of the injection cylinder;
step three: the screw is rotated to enable the liquid zinc alloy in the inner cavity of the injection cylinder to enter the cavity after passing through the injection nozzle and the extrusion cavity in sequence, and then the liquid zinc alloy is solidified and molded in the cavity.
In the third step, after the liquid zinc alloy enters the die cavity through the injection nozzle and the extrusion cavity in sequence, the temperature in the die cavity is kept at 180-240 ℃ through the crystallizer.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure, convenient use, easy realization of mechanical control, high technical integration level and continuous production, thereby improving the production efficiency, reducing the production cost and effectively ensuring the product quality.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
the marks in the figure: 1. the casting device comprises a pouring ladle, 2, a fixed template, 3, a core seat, 4, a core, 5, a crystallizer, 6, a movable traction plate, 7, a cavity, 8, an injection nozzle, 9, a resistance preheater, 10, an injection cylinder, 11, a screw, 12, an extrusion cavity, 13, a die orifice, 14, a dovetail groove, 15, a sealing groove, 16, a hydraulic press, 17, a mounting groove, 18 and a clamping seat.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
As shown in fig. 1 and 2, an injection molding die for zinc-based alloy pipes comprises a middle casting ladle 1 for receiving liquid zinc alloy, a fixed template 2, a core 4, a core seat 3 for installing the core 4, a crystallizer 5, a movable pulling plate 6 and an injection cylinder 10 with a hollow structure inside, wherein a liquid outlet of the middle casting ladle 1 is provided with a sliding water gap for controlling the flow rate and the flow rate of the liquid zinc alloy, one end of the injection cylinder 10 is provided with an injection nozzle 8 communicated with the inner cavity of the injection cylinder 10, the other end of the injection cylinder 10 is in threaded connection with a screw 11, the middle casting ladle 1 is installed at the top of the injection cylinder 10, the liquid outlet of the middle casting ladle 1 is communicated with the inner cavity of the injection cylinder 10, the injection nozzle 8 is columnar, the outer side of the injection nozzle 8 is sequentially sleeved with the fixed template 2 and the core 4 along the direction far away from the injection cylinder 10, the outer side of the core 4 is sequentially sleeved with an extrusion cavity 12, one side of the crystallizer 5 is provided with a plurality of the core seat 3 and the crystallizer 5, one side of the core seat 3 is far away from the die 6, the pulling plate 6 is further communicated with the zinc-based alloy 6, the extrusion cavity is further communicated with the zinc-based alloy 6, and the inner cavity is further communicated with the zinc-based alloy 6, and the cavity is further communicated with the liquid zinc-based alloy 13 is formed by the extrusion system, and the cavity 13 is communicated with the cavity 13.
According to the scheme, the resistance preheater 9 for heating the injection tube 10 is arranged on the outer side of the injection tube 10, and before the die is used, the injection tube is heated by the resistance preheater 9, so that defects of the zinc-based alloy tube due to chilling can be avoided.
Further optimizing the scheme, in order to be convenient for remove the liquid zinc alloy (i.e. zinc-based alloy pipe) level after the shaping from die cavity 7, moving traction plate 6 has seted up dovetail 14 in the one end that is close to crystallizer 5.
Further optimizing this scheme, remove the traction plate 6 still be provided with the seal groove 15 that is linked together with the dovetail 14 in the inboard of dovetail 14, the one end that the fixed bolster 2 was kept away from to the core 4 matches with seal groove 15, and the one end that the fixed bolster 2 was kept away from to the core 4 inlays and establishes in seal groove 15 to make die cavity 7 reach better leakproofness, prevent that liquid zinc alloy (i.e. zinc base alloy pipe) warp after the shaping.
Further optimizing this scheme, the one end that removes the traction plate 6 and keep away from crystallizer 5 links to each other with hydraulic press 16, and hydraulic press 16 control removes traction plate 6 and control and remove, in order to reach best result of use, the below of removing traction plate 6 is provided with fixed slide in order to guarantee the horizontal movement of removing traction plate 6 to improve zinc-based alloy pipe's shaping precision, and can reduce the mould wearing and tearing.
Further optimizing this scheme, the mounting groove 17 has been seted up to the one end that is close to fixed bolster 2 to core print 3, core 4 is provided with the cassette 18 with mounting groove 17 assorted in the one end that is close to fixed bolster 2 an organic whole.
Further optimizing this scheme, core print seat 3 passes through the bolt with fixed bolster 2 and links to each other.
Further optimizing the scheme, the extrusion chamber 12 is conical, the central axis of the extrusion chamber 12 coincides with the central axis of the injection nozzle 8, and the injection nozzle 8 penetrates into the extrusion chamber 12 from the vertex of the conical structure.
The molding method for preparing the zinc-based alloy pipe by adopting the injection molding die of the zinc-based alloy pipe comprises the following steps:
step one: heating the injection cylinder 10 and the screw 11 to 200-220 ℃ through a resistance preheater 9 arranged outside the injection cylinder 10, and preserving heat for 50-60 minutes at 200-220 ℃;
step two: pouring the liquid zinc alloy into a pouring ladle 1 when the liquid zinc alloy is heated to 530-550 ℃, and opening a sliding water gap arranged below the pouring ladle 1 at 510-520 ℃ to enable the liquid zinc alloy to enter the inner cavity of the injection cylinder 10;
step three: the screw 11 is rotated to enable the liquid zinc alloy in the inner cavity of the injection cylinder 10 to enter the cavity 7 after passing through the injection nozzle 8 and the extrusion cavity 12 in sequence and to be solidified and molded in the cavity 7.
In the third step, after the liquid zinc alloy enters the die cavity 7 through the injection nozzle 8 and the extrusion cavity 12 in sequence, the temperature in the die cavity 7 is kept at 180-240 ℃ through the crystallizer 5.
The invention is preferentially applicable to the preparation of ZA27 zinc-based alloy tubes, liquid zinc alloy can be solidified and crystallized in the inner cavity of the injection tube 10, then dendrites which are firstly separated out are crushed to form equiaxed crystals by strongly shearing and stirring by the screw 11, semi-solid zinc alloy slurry is obtained, and meanwhile, the semi-solid zinc alloy slurry enters the cavity 7 through the extrusion cavity 12 under the action of the pushing force of the screw 11, and the high-aluminum zinc alloy tube with compact structure, uniform components and excellent use performance is obtained after being cooled by the crystallizer 5.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides an injection molding mould of zinc-based alloy pipe, is including being used for accepting pouring ladle (1) in the middle of liquid zinc alloy, fixed bolster (2), core (4), be used for installing core (4) core print seat (3), crystallizer (5), remove traction plate (6) and inside syringe (10) for hollow structure, the liquid outlet department of pouring ladle (1) is provided with the sliding gate who is used for controlling liquid zinc alloy velocity of flow and flow, its characterized in that: one end of the injection cylinder (10) is provided with an injection nozzle (8) communicated with the inner cavity of the injection cylinder (10), the inner side of the other end of the injection cylinder (10) is connected with a screw (11) in a threaded manner, the middle casting ladle (1) is arranged at the top of the injection cylinder (10) and the liquid outlet of the middle casting ladle (1) is communicated with the inner cavity of the injection cylinder (10), the injection nozzle (8) is columnar, the outer side of the injection nozzle (8) is sequentially sleeved with the fixed template (2) and the core (4) along the direction away from the injection cylinder (10), the inside of the core (4) is provided with an extrusion cavity (12) at the outlet of the injection nozzle (8), the outer side of the core (4) is sequentially sleeved with the core seat (3) and the crystallizer (5), one side of the crystallizer (5) away from the core seat (3) is provided with the movable traction plate (6), the core (4), the crystallizer (5), the core seat (3) and the movable plate (6) are jointly surrounded by the movable plate (6) to form the liquid zinc alloy (7), and the inner side of the core (4) is provided with a plurality of extrusion cavities (13) which are communicated with the extrusion cavity (13);
a resistance preheater (9) for heating the injection cylinder (10) is arranged on the outer side of the injection cylinder (10);
the movable traction plate (6) is provided with a dovetail groove (14) at one end close to the crystallizer (5).
2. The injection molding die for zinc-based alloy tubes according to claim 1, wherein: the movable traction plate (6) is further provided with a sealing groove (15) communicated with the dovetail groove (14) at the inner side of the dovetail groove (14), and one end, far away from the fixed template (2), of the core (4) is matched with the sealing groove (15).
3. The injection molding die for zinc-based alloy tubes according to claim 2, wherein: one end of the movable traction plate (6) far away from the crystallizer (5) is connected with a hydraulic machine (16).
4. The injection molding die for zinc-based alloy tubes according to claim 1, wherein: the core print seat (3) is provided with a mounting groove (17) at one end close to the fixed template (2), and the core (4) is integrally provided with a clamping seat (18) matched with the mounting groove (17) at one end close to the fixed template (2).
5. The injection molding die for zinc-based alloy tubes according to claim 4, wherein: the core print seat (3) is connected with the fixed template (2) through bolts.
6. The injection molding die for zinc-based alloy tubes according to claim 1, wherein: the extrusion cavity (12) is conical, the central axis of the extrusion cavity (12) coincides with the central axis of the injection nozzle (8), and the injection nozzle (8) penetrates into the extrusion cavity (12) from the vertex of the conical structure.
7. A molding method for preparing a zinc-based alloy pipe by using the injection molding mold of the zinc-based alloy pipe according to any one of claims 1 to 6, comprising the steps of:
step one: heating the injection cylinder (10) and the screw (11) to 200-220 ℃ through a resistance preheater (9) arranged on the outer side of the injection cylinder (10), and preserving heat for 50-60 minutes at 200-220 ℃;
step two: pouring the liquid zinc alloy into a pouring ladle (1) when the liquid zinc alloy is heated to 530-550 ℃, and opening a sliding water gap arranged below the pouring ladle (1) when the liquid zinc alloy is heated to 510-520 ℃ to enable the liquid zinc alloy to enter the inner cavity of an injection cylinder (10);
step three: the screw (11) is rotated to enable the liquid zinc alloy in the inner cavity of the injection cylinder (10) to enter the cavity (7) after passing through the injection nozzle (8) and the extrusion cavity (12) in sequence and be solidified and molded in the cavity (7).
8. The molding method according to claim 7, wherein: in the third step, after the liquid zinc alloy sequentially enters the die cavity (7) through the injection nozzle (8) and the extrusion cavity (12), the temperature in the die cavity (7) is kept at 180-240 ℃ through the crystallizer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592026.4A CN109622918B (en) | 2018-12-25 | 2018-12-25 | Injection molding die and molding method for zinc-based alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592026.4A CN109622918B (en) | 2018-12-25 | 2018-12-25 | Injection molding die and molding method for zinc-based alloy pipe |
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| Publication Number | Publication Date |
|---|---|
| CN109622918A CN109622918A (en) | 2019-04-16 |
| CN109622918B true CN109622918B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811592026.4A Active CN109622918B (en) | 2018-12-25 | 2018-12-25 | Injection molding die and molding method for zinc-based alloy pipe |
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| CN112589070A (en) * | 2020-11-27 | 2021-04-02 | 诸暨市旭祥弹簧有限公司 | Die-casting die of horizontal cold chamber die-casting machine and process thereof |
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|---|---|---|---|---|
| JPH04123859A (en) * | 1990-09-14 | 1992-04-23 | Ryobi Ltd | Valve construction for degassing device of injection molding machine |
| JP2003245765A (en) * | 2002-02-20 | 2003-09-02 | Atsuta Kigyo Kk | Casting method for die casting and casting device for die casting |
| JP2005035196A (en) * | 2003-07-16 | 2005-02-10 | Toyoda Gosei Co Ltd | Method, mold and equipment for injection molding |
| WO2006134628A1 (en) * | 2005-06-13 | 2006-12-21 | Makabealumi, Inc | Molding apparatus |
| CN106584771A (en) * | 2016-10-19 | 2017-04-26 | 广州华研精密机械有限公司 | Injection molding process of syringe |
| CN209272440U (en) * | 2018-12-25 | 2019-08-20 | 许昌中发耐磨材料研究所有限公司 | A kind of injecting molding die of zinc-containing alloy pipe |
-
2018
- 2018-12-25 CN CN201811592026.4A patent/CN109622918B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123859A (en) * | 1990-09-14 | 1992-04-23 | Ryobi Ltd | Valve construction for degassing device of injection molding machine |
| JP2003245765A (en) * | 2002-02-20 | 2003-09-02 | Atsuta Kigyo Kk | Casting method for die casting and casting device for die casting |
| JP2005035196A (en) * | 2003-07-16 | 2005-02-10 | Toyoda Gosei Co Ltd | Method, mold and equipment for injection molding |
| WO2006134628A1 (en) * | 2005-06-13 | 2006-12-21 | Makabealumi, Inc | Molding apparatus |
| CN106584771A (en) * | 2016-10-19 | 2017-04-26 | 广州华研精密机械有限公司 | Injection molding process of syringe |
| CN209272440U (en) * | 2018-12-25 | 2019-08-20 | 许昌中发耐磨材料研究所有限公司 | A kind of injecting molding die of zinc-containing alloy pipe |
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| CN109622918A (en) | 2019-04-16 |
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