CN113000818A - Vertical indirect extrusion casting device for vacuum pump rotor and preparation method thereof - Google Patents
Vertical indirect extrusion casting device for vacuum pump rotor and preparation method thereof Download PDFInfo
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- CN113000818A CN113000818A CN202110203549.0A CN202110203549A CN113000818A CN 113000818 A CN113000818 A CN 113000818A CN 202110203549 A CN202110203549 A CN 202110203549A CN 113000818 A CN113000818 A CN 113000818A
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- die
- aluminum alloy
- clamp spring
- alloy liquid
- pressure
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses an indirect extrusion casting die for a vacuum pump rotor and a preparation method thereof, wherein the die comprises a movable die, a fixed die, a sprue bush clamp spring and a die carrier, wherein the clamp spring is divided into a left clamp spring and a right clamp spring which are driven by an oil cylinder in a matched manner; after the spraying of the die is finished, the die is closed, the clamp springs are closed under the action of the oil cylinder, the feeding machine starts to act, molten qualified aluminum alloy liquid is poured into a standby charging barrel, the charging barrel is opposite to the receiving die, the aluminum alloy liquid slowly rises under the action of a punch head and enters a die cavity through the clamp springs and a runner until the die cavity is full of the aluminum alloy liquid; at this time, the apparatus converts the speed into pressure, and the ram is continuously pressurized to allow the aluminum alloy liquid to be solidified while being maintained at a high pressure. Opening the clamp spring, opening the die, taking out the product, spraying and then performing cyclic production; the invention can improve the production efficiency of parts, reduce the rejection rate, reduce the machining allowance, save the cost, reduce the generation of air hole looseness and ensure the air tightness and the thickness and hardness requirements of hard anodic oxidation.
Description
Technical Field
The invention relates to the technical field of dies, in particular to an indirect extrusion casting die for a vacuum pump rotor and a preparation method thereof.
Background
The fixed scroll plate and the movable scroll plate are mainly used for scroll vacuum pumps in the petrochemical industry, the movable scroll plate moves around the center of a scroll body of the fixed scroll plate under the driving of a crankshaft, and a contact point moves along a scroll curved surface to realize air suction, compression and exhaust. Under the drive of the motor, a group of new crescent closed cavities are formed when the crankshaft rotates for one circle, so that the circulation of air suction, compression and exhaust of the scroll vacuum pump is realized, and the air to be pumped is contained and forcibly conveyed. The working conditions of the static vortex disc and the movable vortex disc are severe, and the materials are required to have good wear resistance, strength, toughness and air tightness.
Most of the parts in the vacuum pump industry at present are produced by low-pressure casting, gravity casting and high-pressure casting. The low-pressure casting is mainly used for producing large and thick-walled parts due to the low speed during mold filling; the filling pressure is only one atmospheric pressure, so that the part structure is not compact enough, the size precision is poor, and the vacuum pump is not suitable for a vacuum pump with high use requirements.
The gravity casting is widely used at present due to simple operation and low cost; however, only gravity is used during filling, pressure transmission is avoided, solidification is slow, the internal structure of a product is not compact enough, crystal grains are coarse, the size precision is poor, and the high-altitude pump is generally used for large-scale wall thickness and requires low requirements.
The vacuum high-pressure casting has higher production cost, more complex process operation and low stability, and is generally used for vacuum pumps with thin walls, small sizes and lower leakage prevention requirements.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an indirect extrusion casting die for a vacuum pump rotor and a preparation method thereof, which can improve the production efficiency of parts, reduce the rejection rate, reduce the machining allowance, save the cost, reduce the generation of air holes and loose, and ensure the air tightness and the thickness and hardness requirements of hard anodic oxidation.
The technical problem to be solved by the invention is realized by the following technical scheme:
an indirect extrusion casting die for a vacuum pump rotor and a preparation method thereof comprise a movable die, a fixed die, a sprue bush clamp spring and a die carrier, wherein the clamp spring is divided into a left clamp spring and a right clamp spring which are driven by an oil cylinder in a matching way; after the spraying of the die is finished, the die is closed, the clamp springs are closed under the action of the oil cylinder, the feeding machine starts to act, molten qualified aluminum alloy liquid is poured into a standby charging barrel, the charging barrel is opposite to the receiving die, the aluminum alloy liquid slowly rises under the action of a punch head and enters a die cavity through the clamp springs and a runner until the die cavity is full of the aluminum alloy liquid; at this time, the apparatus converts the speed into pressure, and the ram is continuously pressurized to allow the aluminum alloy liquid to be solidified while being maintained at a high pressure. And opening the clamp spring, opening the die, taking out the product, spraying and then performing cyclic production.
Preferably, the aluminum alloy pouring temperature is 700 ℃, the mold working temperature is 250 ℃, the pressure maintaining time is 30s, the pressure maintaining pressure is 140Mpa, the opening degree of the booster valve is 80%, and the casting pressure is 80 Mpa.
Has the advantages that: after the structure is adopted, the production efficiency of parts is effectively improved, the rejection rate is reduced, the machining allowance is reduced, the cost is saved, the generation of porosity of air holes is reduced, and the requirements of air tightness and the thickness and hardness of hard anodic oxidation are met.
Drawings
FIG. 1 is a schematic structural diagram of a fixed mold of the present invention.
FIG. 2 is a schematic structural diagram of a moving mold according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, which are not intended to limit the invention in any manner.
Example 1
The indirect extrusion casting die for the vacuum pump rotor and the preparation method thereof as shown in the figure 1-2 comprise a movable die, a fixed die, a sprue bush clamp spring and a die carrier, wherein the clamp spring is divided into a left clamp spring and a right clamp spring which are driven by an oil cylinder in a matched manner; after the spraying of the die is finished, the die is closed, the clamp springs are closed under the action of the oil cylinder, the feeding machine starts to act, molten qualified aluminum alloy liquid is poured into a standby charging barrel, the charging barrel is opposite to the receiving die, the aluminum alloy liquid slowly rises under the action of a punch head and enters a die cavity through the clamp springs and a runner until the die cavity is full of the aluminum alloy liquid; at this time, the apparatus converts the speed into pressure, and the ram is continuously pressurized to allow the aluminum alloy liquid to be solidified while being maintained at a high pressure. And opening the clamp spring, opening the die, taking out the product, spraying and then performing cyclic production.
The aluminum alloy casting temperature is 700 ℃, the mold working temperature is 250 ℃, the pressure maintaining time is 30s, the pressure maintaining pressure is 140Mpa, the opening degree of the booster valve is 80%, and the casting pressure is 80 Mpa.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts of the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (2)
1. An indirect extrusion casting die for a vacuum pump rotor and a preparation method thereof are characterized by comprising a movable die, a fixed die, a sprue bush clamp spring and a die carrier, wherein the clamp spring is divided into a left clamp spring and a right clamp spring which are driven by an oil cylinder in a matched manner; after the spraying of the die is finished, the die is closed, the clamp springs are closed under the action of the oil cylinder, the feeding machine starts to act, molten qualified aluminum alloy liquid is poured into a standby charging barrel, the charging barrel is opposite to the receiving die, the aluminum alloy liquid slowly rises under the action of a punch head and enters a die cavity through the clamp springs and a runner until the die cavity is full of the aluminum alloy liquid; at this time, the apparatus converts the speed into pressure, and the ram is continuously pressurized to allow the aluminum alloy liquid to be solidified while being maintained at a high pressure. And opening the clamp spring, opening the die, taking out the product, spraying and then performing cyclic production.
2. The indirect extrusion casting mold for a vacuum pump rotor and the manufacturing method thereof as claimed in claim 1, wherein the aluminum alloy casting temperature is 700 ℃, the mold operating temperature is 250 ℃, the dwell time is 30s, the dwell pressure is 140Mpa, the booster valve opening is 80%, and the casting pressure is 80 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110203549.0A CN113000818A (en) | 2021-02-23 | 2021-02-23 | Vertical indirect extrusion casting device for vacuum pump rotor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110203549.0A CN113000818A (en) | 2021-02-23 | 2021-02-23 | Vertical indirect extrusion casting device for vacuum pump rotor and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113000818A true CN113000818A (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110203549.0A Pending CN113000818A (en) | 2021-02-23 | 2021-02-23 | Vertical indirect extrusion casting device for vacuum pump rotor and preparation method thereof |
Country Status (1)
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| CN (1) | CN113000818A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461698A (en) * | 2002-05-31 | 2003-12-17 | 许思光 | Injection mould for teeming sprae and non-channel push-plate |
| CN103753773A (en) * | 2014-01-24 | 2014-04-30 | 上海工程技术大学 | Improved structure of pouring gate sprue of injection molding mould |
| CN105397065A (en) * | 2015-11-10 | 2016-03-16 | 苏州三基铸造装备股份有限公司 | Extrusion casting production technology of car clutch shell |
| CN108127874A (en) * | 2018-01-15 | 2018-06-08 | 青岛海泰科模具有限公司 | One kind is from dynamic circuit breaker cast gate injection mold |
| CN209207946U (en) * | 2018-12-19 | 2019-08-06 | 柳道万和(苏州)热流道***有限公司 | Injection mold system |
| CN110774540A (en) * | 2019-11-28 | 2020-02-11 | 玉环汽车配件实业有限公司 | Injection mold of self-adaptation jump ring position circle |
-
2021
- 2021-02-23 CN CN202110203549.0A patent/CN113000818A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461698A (en) * | 2002-05-31 | 2003-12-17 | 许思光 | Injection mould for teeming sprae and non-channel push-plate |
| CN103753773A (en) * | 2014-01-24 | 2014-04-30 | 上海工程技术大学 | Improved structure of pouring gate sprue of injection molding mould |
| CN105397065A (en) * | 2015-11-10 | 2016-03-16 | 苏州三基铸造装备股份有限公司 | Extrusion casting production technology of car clutch shell |
| CN108127874A (en) * | 2018-01-15 | 2018-06-08 | 青岛海泰科模具有限公司 | One kind is from dynamic circuit breaker cast gate injection mold |
| CN209207946U (en) * | 2018-12-19 | 2019-08-06 | 柳道万和(苏州)热流道***有限公司 | Injection mold system |
| CN110774540A (en) * | 2019-11-28 | 2020-02-11 | 玉环汽车配件实业有限公司 | Injection mold of self-adaptation jump ring position circle |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210622 |
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| RJ01 | Rejection of invention patent application after publication |