CN107803468B - Screw rotor molding machine - Google Patents
Screw rotor molding machine Download PDFInfo
- Publication number
- CN107803468B CN107803468B CN201711275724.7A CN201711275724A CN107803468B CN 107803468 B CN107803468 B CN 107803468B CN 201711275724 A CN201711275724 A CN 201711275724A CN 107803468 B CN107803468 B CN 107803468B
- Authority
- CN
- China
- Prior art keywords
- rotor
- core rod
- cylinder
- rotor core
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000465 moulding Methods 0.000 title claims abstract description 12
- 239000003110 molding sand Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 244000035744 Hura crepitans Species 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
- B22C19/06—Devices for rapping or loosening the pattern
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A screw rotor molding machine comprises a workbench, an outer mold, a rotor core rod and a driving source, wherein the outer mold is arranged on the workbench and provided with a molding sand adding port; the rotor core rod is arranged on the workbench in a lifting manner from bottom to top, the upper end of the rotor core rod extends into the outer die, and a rotor cavity is formed between the outer side of the rotor core rod and the inner side of the outer die. Compared with the prior art, the invention has the advantages that: the cylinder is adopted to drive the rotor core rod to move downwards, and the rotor core rod naturally rotates along the spiral inner cavity of the sand core, so that the rotor core rod and the solidified sand core cannot be blocked, the rotating speed can be adjusted at any time, and the integrity and the quality of the sand core are ensured.
Description
Technical Field
The invention relates to a sand mould forming machine for a screw, which can be applied to the mould manufacturing of the screw.
Background
Screw compressor rotors are the core components of screw compressors and screw pumps, and the design and processing of rotor tooth profiles are related to the reliability, efficiency and noise of the machine body operation. Currently, widely used tooth form processing methods include a milling method of a disc milling cutter, a rolling pin generating method and a pin grinding forming method, and the three methods have the defects of low production efficiency, high energy consumption and non-uniform product quality organization, and in addition, large equipment is required, so that the cost is high. The relevant literature can refer to "machining of screw compressor rotors" written in tool technology, 10 month 2004, chen Liming; "screw compressor rotor grinding method", as taught by Vol28, N0,7, 2000, wu Xianjun; the patent document can refer to the Chinese patent application with the application number 201310182977.5 for disclosing a grinding method for grinding a dry screw rotor (with the application publication number CN 103264339A).
The sand box is also adopted to be matched with the resin sand core for manufacturing, the resin sand core is usually manufactured manually, the production efficiency is low, the labor intensity is high, the quality of the formed sand core is poor, and the quality of the final rotor is difficult to guarantee.
As an improvement, the prior art discloses a sand core manufacturing device and method of a screw rotor, and chinese patent application with application number 201210322175.5 discloses an automatic sand core demoulding mechanism and demoulding method of a screw compressor rotor (application publication number CN102909321 a), wherein a left die and a right die in the application are butted and then jointly enclose a sand core cavity, a screw compressor rotor core rod is arranged in the middle of the sand core cavity, the screw compressor rotor core rod is screwed on a bracket and can rotate into and out of the synthetic sand core cavity, and the lower end of the screw compressor rotor core rod is connected with a driving mechanism on the bracket. During demolding, the pneumatic motor drives the rotor core rod of the screw compressor to rotate out of the sand core cavity, the thread characteristic of the surface of the rotor is fully utilized in the demolding process, and the continuity of the thread on the surface of the rotor is guaranteed, so that the quality of the rotor is guaranteed, the rotating speed of the rotor core rod is stable and easy to control, the whole conception is ingenious, the whole process is automatically controlled, the labor intensity of workers is reduced, and the production efficiency is improved.
In the document CN102909321a, although a new idea is realized to manufacture the sand core of the screw rotor, in the demolding process of practical application, the demolding speed of the rotor core rod of the screw compressor is controlled by a motor, the rotational speed is too high, and the rotor core rod is easy to be blocked, so that the molded sand core is damaged.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a screw rotor molding machine with self-adjustable core rod demolding speed aiming at the technical state of the art.
Yet another object of the present invention is to provide a screw rotor molding machine in which the resulting sand core can be used directly for casting, in view of the state of the art.
The technical scheme adopted for solving the technical problems is as follows: a screw rotor molding machine, comprising
A work table;
an outer mold which is arranged on the workbench and is provided with a molding sand adding port;
the rotor core rod is arranged on the workbench in a lifting manner from bottom to top, the upper end of the rotor core rod extends into the outer die, and a rotor cavity is formed between the outer side of the rotor core rod and the inner side of the outer die; and
a driving source which is in driving connection with the lower end of the rotor core rod,
the driving source is a cylinder, the cylinder is provided with a piston rod extending upwards, and the rotor core rod is rotatably connected with the piston rod and can ascend and descend along with the piston rod.
Further, a plurality of first heating rods longitudinally arranged or a plurality of heating rings transversely arranged are arranged on the periphery of the outer die.
Preferably, the outer mold comprises a first mold and a second mold which is opened and closed with the first mold, and the cross sections of the first mold and the second mold are semicircular.
Further, the cylinder comprises a first cylinder and a second cylinder which are arranged side by side, piston rods extending upwards from the first cylinder and the second cylinder are connected to two ends of the driving plate, and the rotor core rod can be rotatably connected to the middle of the driving plate. The cylinder and the rotor core rod are not arranged on the same straight line, but are arranged between the two cylinders, so that the device can be compact and does not need to be long.
Preferably, a guide cylinder extends downwards from the middle of the driving plate, a bearing is arranged in the guide cylinder, and the rotor core rod is rotatably arranged in the bearing.
Further, a second electric heating rod is arranged inside the rotor core rod along the length direction. Ensuring the curing consistency of the molding sand.
The inner side wall of the outer mold can be detachably provided with a sand cylinder, a rotor cavity is formed between the sand cylinder and the outer side of the rotor core rod, after the sand core is shaped, the sand cylinder and the sand core are connected into a whole. When the screw rotor is manufactured, the screw rotor is only required to be directly cast in the sand core, measures such as filling up by using a sand box are not needed, and the sand cylinder plays a role of the sand box.
Compared with the prior art, the invention has the advantages that: the cylinder is adopted to drive the rotor core rod to move downwards, and the rotor core rod naturally rotates along the spiral inner cavity of the sand core, so that the rotor core rod and the solidified sand core cannot be blocked, the rotating speed can be adjusted at any time, and the integrity and the quality of the sand core are ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is a schematic view of the structure of the outer mold after opening in the embodiment.
Fig. 3 is a perspective cross-sectional view of an embodiment.
Fig. 4 is a schematic view of the structure of the embodiment with the outer mold and the table removed.
Fig. 5 is an enlarged view of a sand cylinder and sand core combination.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 4, the screw rotor molding machine of the present embodiment includes a table 10, an outer mold 1, a rotor core rod 3, a sand cylinder 2, and a driving source, and the table 10 has a floor surface with a certain height.
The outer mold 1 is arranged on the workbench 10 and is provided with a molding sand adding port 13; the periphery of the outer die 1 is provided with a plurality of first heating rods 14 which are longitudinally arranged, the outer die 1 comprises a first die 11 and a second die 12 which is opened and closed with the first die 11, and the cross sections of the first die 11 and the second die 12 are semicircular. The first die 11 and the second die 12 can be driven to open and close by the armrest 15.
The rotor core rod 3 is arranged on the workbench 10 in a lifting manner from bottom to top, the upper end of the rotor core rod stretches into the outer die 1, the outer side of the rotor core rod 3 and the inner side of the outer die 1 form a rotor cavity 100; the rotor core rod 3 is internally provided with a second electric heating rod 31 along the length direction.
The sand cylinder 2 can be detachably arranged on the inner side wall of the outer die 1, a rotor cavity 100 is formed between the sand cylinder 2 and the outer side of the rotor core rod 3, and after the sand core 8 is shaped, the sand cylinder 2 and the sand core 8 are connected into a whole.
The driving source is in driving connection with the lower end of the rotor core rod 3, the driving source in this embodiment is a first cylinder 5 and a second cylinder 5a which are arranged side by side, the first cylinder 5 and the second cylinder 5a are arranged below the workbench 10, the first cylinder 5 and the second cylinder 5a are provided with a piston rod 51 which extends upwards, and the rotor core rod 3 is rotatably connected with the piston rod 51 and can ascend and descend along with the piston rod 51. The piston rods 51 are connected to both ends of the drive plate 6, and the rotor core rod 3 is rotatably connected to the middle of the drive plate 6. Further, a guide cylinder 61 is extended downward from the middle of the drive plate 6, a bearing 62 is provided in the guide cylinder 61, the rotor core rod 3 is rotatably provided in the bearing 62, the rotor core rod 3 is restrained from moving upward by a lock nut 63 at the lower end, and the rotor core rod 3 has a shoulder portion 64 for restraining the rotor core rod 3 from moving downward.
When the screw rotor is manufactured, the rotor core rod is arranged on the outer side of the rotor core rod 3, the outer die 1 is closed, meanwhile, the first heating rod 14 and the second heating rod 31 are electrified and heated, molding sand is filled into the molding sand adding port 13 of the outer die 1, the rotor cavity 100 is filled with the molding sand, then the molding sand is solidified to form the sand core 8, the first air cylinder 5 and the second air cylinder 5a work, the driving plate 6 descends, the rotor core rod 3 moves downwards and simultaneously rotates along the spiral cavity in the sand core 8 and is separated from the sand core 8, the outer die 1 is opened, the sand cylinder 2 is taken out, the sand core 8 is molded in the sand cylinder 2, and as shown in fig. 5, when the screw rotor is manufactured, the screw rotor is only required to be directly cast in the sand core 2, and measures such as filling with a sand box are not needed.
Claims (5)
1. A screw rotor molding machine, comprising
A work table (10);
an outer mold (1) provided on the table (10) and having a molding sand adding port (13);
a rotor core rod (3) which is arranged on the workbench (10) in a lifting manner from bottom to top, and the upper end of which extends into the outer die (1), wherein a rotor cavity (100) is formed between the outer side of the rotor core rod (3) and the inner side of the outer die (1); and
a driving source which is in driving connection with the lower end of the rotor core rod (3),
the driving source is a cylinder, the cylinder is provided with a piston rod (51) extending upwards, and the rotor core rod (3) is rotatably connected with the piston rod (51) and can ascend and descend along with the piston rod (51);
the periphery of the outer die (1) is provided with a plurality of first heating rods (14) longitudinally arranged or a plurality of heating rings transversely arranged;
the inner side wall of the outer mold (1) can be detachably provided with a sand cylinder (2), a rotor cavity (100) is formed between the sand cylinder (2) and the outer side of the rotor core rod (3), and after the sand core (8) is shaped, the sand cylinder (2) and the sand core (8) are connected into a whole.
2. Screw rotor moulding machine according to claim 1, characterized in that the outer mould (1) comprises a first mould (11) and a second mould (12) which is open and close to the first mould (11), the cross sections of the first mould (11) and the second mould (12) being semicircular.
3. Screw rotor moulding machine according to claim 1, characterized in that the cylinders comprise a first cylinder (5) and a second cylinder (5 a) arranged side by side, the piston rods (51) of the first cylinder (5) and the second cylinder (5 a) extending upwards are connected to the two ends of the drive plate (6), the rotor core rod (3) being rotatably connected to the middle part of the drive plate (6).
4. A screw rotor moulding machine according to claim 3, characterized in that the middle part of the drive plate (6) extends downwards to form a guide cylinder (61), a bearing (62) being arranged in the guide cylinder (61), the rotor core rod (3) being rotatably arranged in the bearing (62).
5. Screw rotor moulding machine according to claim 1, characterized in that the rotor core rod (3) is internally provided with a second electric heating rod (31) along its length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711275724.7A CN107803468B (en) | 2017-12-06 | 2017-12-06 | Screw rotor molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711275724.7A CN107803468B (en) | 2017-12-06 | 2017-12-06 | Screw rotor molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107803468A CN107803468A (en) | 2018-03-16 |
| CN107803468B true CN107803468B (en) | 2023-10-24 |
Family
ID=61579514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711275724.7A Active CN107803468B (en) | 2017-12-06 | 2017-12-06 | Screw rotor molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107803468B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116984563A (en) * | 2023-09-27 | 2023-11-03 | 万向钱潮股份公司 | Machining device and machining method for ball screw nut |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6483336A (en) * | 1987-09-25 | 1989-03-29 | Suzuki Motor Co | Casting core and its manufacture |
| CN2506375Y (en) * | 2001-09-24 | 2002-08-21 | 段晓鸣 | Resh sand blasting core machine with constant sand blasting pressure |
| JP2008212942A (en) * | 2007-02-28 | 2008-09-18 | Toyota Motor Corp | Method for manufacturing cylinder block |
| CN102909321A (en) * | 2012-09-04 | 2013-02-06 | 桐乡合德机械有限公司 | Sand core automatic demoulding mechanism and demoulding method for screw compressor rotor |
| CN204247918U (en) * | 2014-11-17 | 2015-04-08 | 唐永广 | Core shooter |
| CN104668480A (en) * | 2013-11-28 | 2015-06-03 | 无锡市双全机械制造厂 | Sand-coated iron pattern core shooter |
| CN105170915A (en) * | 2015-10-20 | 2015-12-23 | 陆亚明 | Manufacturing method for screw rod of air compressor |
| CN205834115U (en) * | 2016-05-26 | 2016-12-28 | 刘天平 | A kind of sand mo(u)ld structure of tubular article foundry goods |
| CN207521646U (en) * | 2017-12-06 | 2018-06-22 | 陆亚明 | Screw rotors moulding machine |
-
2017
- 2017-12-06 CN CN201711275724.7A patent/CN107803468B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6483336A (en) * | 1987-09-25 | 1989-03-29 | Suzuki Motor Co | Casting core and its manufacture |
| CN2506375Y (en) * | 2001-09-24 | 2002-08-21 | 段晓鸣 | Resh sand blasting core machine with constant sand blasting pressure |
| JP2008212942A (en) * | 2007-02-28 | 2008-09-18 | Toyota Motor Corp | Method for manufacturing cylinder block |
| CN102909321A (en) * | 2012-09-04 | 2013-02-06 | 桐乡合德机械有限公司 | Sand core automatic demoulding mechanism and demoulding method for screw compressor rotor |
| CN104668480A (en) * | 2013-11-28 | 2015-06-03 | 无锡市双全机械制造厂 | Sand-coated iron pattern core shooter |
| CN204247918U (en) * | 2014-11-17 | 2015-04-08 | 唐永广 | Core shooter |
| CN105170915A (en) * | 2015-10-20 | 2015-12-23 | 陆亚明 | Manufacturing method for screw rod of air compressor |
| CN205834115U (en) * | 2016-05-26 | 2016-12-28 | 刘天平 | A kind of sand mo(u)ld structure of tubular article foundry goods |
| CN207521646U (en) * | 2017-12-06 | 2018-06-22 | 陆亚明 | Screw rotors moulding machine |
Non-Patent Citations (1)
| Title |
|---|
| 流态自硬砂总结;机械工程师(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107803468A (en) | 2018-03-16 |
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