CN115673022A - Liquid nitrogen cooling constant-temperature extrusion device for mold - Google Patents
Liquid nitrogen cooling constant-temperature extrusion device for mold Download PDFInfo
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- CN115673022A CN115673022A CN202211415116.2A CN202211415116A CN115673022A CN 115673022 A CN115673022 A CN 115673022A CN 202211415116 A CN202211415116 A CN 202211415116A CN 115673022 A CN115673022 A CN 115673022A
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Abstract
The invention discloses a liquid nitrogen cooling constant-temperature extrusion device for a die, which comprises a rack, an extrusion die mechanism, a liquid nitrogen cylinder arranged on the rack, an output hose connected to the liquid nitrogen cylinder and a spray head positioned at the free end of the output hose, wherein a through hole is formed in the axis of a die pad in a penetrating way, annular grooves distributed along the axial direction are uniformly formed in the surface of the die pad, air overflow holes penetrating through the through hole are uniformly formed in the annular grooves, and the annular grooves are communicated with the axial grooves; according to the invention, nitrogen uniformly flows into different annular grooves through the axial grooves, and then flows into the interpenetration holes through the overflow holes, so that the periphery of the extruded aluminum bar is filled with the nitrogen, the aluminum bar is prevented from directly contacting with oxygen in the air, the surface of the aluminum bar which is just extruded is prevented from generating oxidation reaction, the extruded aluminum profile is protected by the nitrogen generated after liquid nitrogen cooling treatment, and the surface of the aluminum profile is prevented from directly contacting with the air to cause oxidation discoloration.
Description
Technical Field
The invention relates to the technical field of aluminum product production equipment, in particular to a liquid nitrogen cooling constant-temperature extrusion device for a die.
Background
The extrusion forming is used as a leading technology and a core link in the production of the aluminum profile and is the key point for ensuring the product quality, shortening the production time and prolonging the service life of a die; during the extrusion process, the deformation and friction of the metal can cause the extrusion temperature of the aluminum alloy to rise, the temperature rise degree can increase along with the increase of the extrusion speed, and the rise of the extrusion temperature can bring many adverse effects to the production of the aluminum profile.
The liquid nitrogen cooling technology can effectively solve the problem of temperature rise of the die in the extrusion process, so the liquid nitrogen cooling technology is concerned by more and more aluminum profile enterprises at home and abroad, and the Chinese utility model patent with the application number of CN212093774U discloses a die liquid nitrogen cooling constant-temperature extrusion device which is characterized in that the die body and a die pad are integrally cooled by liquid nitrogen through the structure of a die sleeve, so that the die can be continuously cooled in the continuous production process, the problem that the die continuously generates heat to influence the product quality in the production process is avoided, the continuous production for a longer time can be realized, and the production efficiency is improved;
above-mentioned utility model patent can play liquid nitrogen cooling's purpose, extrude the back at the aluminium alloy shaping, the aluminium alloy is earlier cooled off through the liquid nitrogen, the temperature of aluminium alloy has been reduced, but the temperature of the aluminium alloy after extruding is still higher than the room temperature, if the aluminium alloy is direct and air contact, can accelerate the oxidation speed on aluminium alloy surface, cause aluminium alloy surface oxidation to change colour, in order to avoid aluminium alloy surface oxidation to change colour, this application adopts liquid nitrogen cooling to produce behind the processing nitrogen gas and protects the aluminium alloy of extruding, avoid aluminium alloy surface direct and air contact and oxidation to change colour.
Disclosure of Invention
The invention aims to provide a die liquid nitrogen cooling constant-temperature extrusion device, which aims to solve the problems that the temperature of an extruded aluminum profile is still higher than room temperature, and if the aluminum profile is directly contacted with air, the oxidation speed of the surface of the aluminum profile is accelerated, so that the surface of the aluminum profile is oxidized and discolored.
In order to achieve the purpose, the invention provides the following technical scheme: a die liquid nitrogen cooling constant-temperature extrusion device comprises a rack, an extrusion die mechanism, a liquid nitrogen cylinder, an output hose and a spray head, wherein the liquid nitrogen cylinder is installed on the rack, the output hose is connected to the liquid nitrogen cylinder, the spray head is located at the free end of the output hose, the extrusion die mechanism is arranged on the rack, a die body is installed at the output end of the extrusion die mechanism, a die pad is installed on one side, opposite to the extrusion die mechanism, of the die body, the die body and the die pad are fixed through a die sleeve, spiral grooves distributed along the axial direction are formed in the inner wall of the die sleeve, the spiral grooves wrap the outer portion of the die body, an axial groove is formed in one side, close to the die pad, of the inner wall of the die sleeve, one end of each spiral groove is communicated with the spray head, and the other end of each spiral groove is communicated with the axial groove;
the die pad is characterized in that a through hole is formed in the axis of the die pad in a penetrating mode, annular grooves distributed along the axial direction are evenly formed in the surface of the die pad, air overflowing holes penetrating through the through hole are evenly formed in the annular grooves, and the annular grooves are communicated with the axial grooves.
And an embedding hole for installing the spray head is formed in one side of the outer part of the die sleeve, and the embedding hole is communicated with the end part of the spiral groove.
The die sleeve is characterized in that a fixing seat is fixedly mounted outside the die sleeve around one side of the embedding hole, the spray head penetrates through the fixing seat, a clamping block is arranged on the spray head, and an expansion spring is sleeved on the spray head between the clamping block and the fixing seat.
And a sealing ring is fixed on the outer edge of the upper end of the embedding hole, and an inner hole of the sealing ring is in interference fit with the spray head.
The embedded hole is matched with the free end of the spray head in shape and is in a taper hole shape.
The spiral groove is spiral and is uniformly wound outside the die body.
The number of spiral turns of the spiral groove is 11, and the pitch of the spiral groove is 3cm.
Wherein the annular groove is disposed around a circumference of the die pad.
And the air overflow holes in each annular groove are uniformly distributed along the circumferential direction of the die cushion.
Wherein, the output hose is sequentially provided with an electromagnetic valve, a safety valve, a pressure gauge, a check valve and a pressure regulator.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the die body and the die cushion are wrapped by the die sleeve, when the aluminum bar is extruded, liquid nitrogen is conveyed to the spiral groove through the output hose, then flows forwards on the surface of the die body along the spiral groove, and is cooled and cooled by the liquid nitrogen, the liquid nitrogen is heated and then becomes nitrogen, the nitrogen flows into the axial groove, the nitrogen uniformly flows into different annular grooves through the axial groove, and then flows into the penetrating hole through the air overflow hole, so that the periphery of the extruded aluminum bar is filled with the nitrogen, the aluminum bar is prevented from directly contacting with oxygen in the air, the oxidation reaction on the surface of the aluminum bar which is just extruded is prevented, meanwhile, the vaporized nitrogen can be utilized, resources are saved, the extruded aluminum bar is protected by the nitrogen generated after the liquid nitrogen cooling treatment, and the oxidative discoloration caused by the direct contact of the surface of the aluminum bar with the air is avoided.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic perspective view of a mold sleeve according to the present invention;
FIG. 3 is a schematic sectional view of the mold sleeve according to the present invention;
FIG. 4 is a schematic perspective view of a die pad according to the present invention;
FIG. 5 is a schematic cross-sectional view of a die pad of the present invention;
fig. 6 is an enlarged schematic view of a portion a in fig. 1.
In FIGS. 1-6: 10. a frame; 20. an extrusion die mechanism; 30. a liquid nitrogen cylinder; 31. an output hose; 32. a spray head; 33. a tension spring; 40. a mold body; 50. a die pad; 51. inserting holes; 52. an annular groove; 53. an air overflow hole; 60. a mold sleeve; 61. a helical groove; 62. an insertion hole; 63. an axial slot; 64. a fixed seat; 70. an aluminum bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1 to fig. 6, the present embodiment provides a technical solution: a die liquid nitrogen cooling constant temperature extrusion device comprises a rack 10, an extrusion die mechanism 20, a liquid nitrogen cylinder 30 fixedly mounted on the rack 10, an output hose 31 connected to the liquid nitrogen cylinder 30 and a spray head 32 fixedly mounted at the free end of the output hose 31, wherein the extrusion die mechanism 20 is fixedly mounted on the rack 10, a die body 40 is mounted at the output end of the extrusion die mechanism 20, a die pad 50 is fixedly mounted at one side of the die body 40 opposite to the extrusion die mechanism 20, extrusion is carried out through the extrusion die mechanism 20, then an aluminum material is extruded into an aluminum rod 70 through the die body 40, and the extruded aluminum rod 70 is extruded through the die pad 50;
wherein, the exterior of the die body 40 and the die pad 50 is fixed by a die sleeve 60, the inner wall of the die sleeve 60 is provided with spiral grooves 61 distributed along the axial direction, the spiral grooves 61 are wrapped on the exterior of the die body 40, one side of the inner wall of the die sleeve 60 close to the die pad 50 is provided with axial grooves 63, one end of the spiral groove 61 is communicated with the spray head 32, the other end of the spiral groove 61 is communicated with the axial grooves 63, the die body 40 and the die pad 50 are wrapped by the die sleeve 60, when the aluminum bar 70 is extruded, liquid nitrogen is conveyed to the spiral groove 61 through the output hose 31, then flows forwards on the surface of the die body 40 along the spiral groove 61, and is cooled through liquid nitrogen, so that the die body 40 can be continuously cooled in the continuous production process, the problem that the product quality is influenced due to continuous heating in the production process is avoided, the continuous production for a longer time can be realized, and the production efficiency is improved; meanwhile, the liquid nitrogen is heated and changed into nitrogen, and then the nitrogen flows into the axial groove 63 to perform the next action;
wherein, the axle center of the die pad 50 has been run through and has been seted up the through hole 51, the annular groove 52 along axial distribution has evenly been seted up on the die pad 50 surface, evenly set up the spillover hole 53 that runs through the through hole 51 in the annular groove 52, annular groove 52 runs through the setting with axial groove 63, aluminium bar 70 after extrusion through mould body 40 runs through the through hole 51 and extrudes, after nitrogen gas flows into axial groove 63 in, make nitrogen gas evenly flow into different annular groove 52 through axial groove 63, then nitrogen gas flows into through spillover hole 53 in the through hole 51, make and be full of nitrogen gas around the aluminium bar 70 after extruding, avoid aluminium bar 70 direct and oxygen in the air to contact, prevent aluminium bar 70 surface that has just extruded from producing oxidation reaction, adopt liquid nitrogen gas production behind the liquid nitrogen cooling treatment to protect aluminium bar 70 who extrudes, avoid aluminium bar 70 surface direct and air contact oxidation discoloration.
Although the aluminum material is oxidized naturally and generates a layer of oxide (Al 2O 3) film on the surface of the aluminum material, which can prevent further oxidation of the aluminum material, the color of the surface of the aluminum bar 70 is changed, so that a PE protective film is coated on the surface of the aluminum bar 70 during the extrusion of the aluminum bar 70, and therefore, after the extrusion of the aluminum bar 70, the aluminum bar 70 needs to be prevented from being directly exposed to the air, and the surface of the aluminum bar 70 which is just extruded is prevented from being directly contacted with the air to be oxidized and discolored.
Wherein, the outside one side of die sleeve 60 is seted up and is used for installing the embedding hole 62 of shower nozzle 32, and the embedding hole 62 and the end through connection of helicla flute 61, when using, insert shower nozzle 32 in embedding hole 62 for shower nozzle 32 and helicla flute 61 link up, and liquid nitrogen cylinder 30 can be through output hose 31 with liquid nitrogen transport in helicla flute 61.
A fixed seat 64 is fixedly installed outside the mold sleeve 60 around one side of the insert hole 62, the spray head 32 penetrates through the fixed seat 64, a clamping block is fixedly installed on the spray head 32, and the spray head 32 between the clamping block and the fixed seat 64 is sleeved with an extension spring 33; when the liquid nitrogen cylinder 30 is started or shut down, the output hose 31 can be subjected to a reverse acting force, and the spray head 32 is easy to separate from the embedded hole 62 at the moment, so that the liquid nitrogen leaks out, therefore, the structure of the fixed seat 64, the clamping block and the telescopic spring 33 is arranged, the force can be buffered and removed depending on the elasticity of the telescopic spring 33, and the aim of preventing the spray head 32 from separating is further achieved; at the same time, the spray head 32 can be restored to the state of being jointed with the embedding hole 62 after being stressed by the function of the extension spring 33.
Wherein, the outer fringe of the upper end of embedding hole 62 is fixed with the sealing washer, and the hole and the shower nozzle 32 interference fit of sealing washer, setting up the sealing washer and can prevent externally that liquid nitrogen from leaking by the embedding hole 62 upper end, also avoid external dust to get into the embedding hole 62 simultaneously and influence production.
Wherein, the embedding hole 62 is matched with the free end of the spray head 32 in shape and is in a taper hole shape; the tapered hole shape described here includes a cylindrical shape having a predetermined size at the upper end and a frustum structure in which the diameter of the circle is gradually reduced, and the cylindrical portion of the head 32 can be engaged in the insertion hole 62.
Wherein, heliciform 61 is the heliciform, and the even winding of helicla flute 61 is outside at mould body 40, the spiral number of turns of helicla flute 61 is 11, the pitch of helicla flute 61 is 3cm, carry the inside back of helicla flute 61 with liquid nitrogen through output hose 31 at liquid nitrogen jar 30, liquid nitrogen can flow forward along helicla flute 61 on the mould body 40 surface, at the in-process that liquid nitrogen flows, cool down mould body 40, can guarantee like this that liquid nitrogen is abundant with mould body 40 surface contact, the efficiency of cooling has been improved.
Wherein, the annular groove 52 sets up around the circumference of die cushion 50, the inside gas overflow hole 53 of every annular groove 52 all follows die cushion 50 circumference evenly distributed, play the refrigerated effect back of cooling down at the liquid nitrogen, the liquid nitrogen can be transformed into nitrogen gas, then nitrogen gas flows into in the axial groove 63, then nitrogen gas passes through in axial groove 63 evenly distributed to annular groove 52, and flow into in the poling hole 51 through the gas overflow hole 53 in the annular groove 52, make and be full of nitrogen gas around the aluminium bar 70 after extruding, avoid aluminium bar 70 direct and the oxygen contact in the air, prevent that the aluminium bar 70 surface of just extruding from producing oxidation reaction, produce nitrogen gas after adopting liquid nitrogen cooling to handle and protect the aluminium bar 70 of extruding, avoid aluminium bar 70 surface direct and air contact and oxidation discoloration.
The output hose 31 is sequentially provided with an electromagnetic valve, a safety valve, a pressure gauge, a check valve and a pressure regulator, and the purpose of controlling parameters such as liquid nitrogen flow and the like is achieved through the above components.
Example 2
Referring to fig. 1-3 and fig. 6, the present embodiment provides a technical solution: a die liquid nitrogen cooling constant temperature extrusion device comprises a rack 10, an extrusion die mechanism 20, a liquid nitrogen cylinder 30 fixedly installed on the rack 10, an output hose 31 connected to the liquid nitrogen cylinder 30 and a spray head 32 fixedly installed at the free end of the output hose 31, wherein the extrusion die mechanism 20 is fixedly installed on the rack 10, a die body 40 is installed at the output end of the extrusion die mechanism 20, a die pad 50 is fixedly installed at one side of the die body 40 opposite to the extrusion die mechanism 20, extrusion is carried out through the extrusion die mechanism 20, then aluminum is extruded into an aluminum rod 70 through the die body 40, and the extruded aluminum rod 70 is extruded through the die pad 50;
wherein, the exterior of the die body 40 and the die pad 50 is fixed by the die sleeve 60, the inner wall of the die sleeve 60 is provided with a spiral groove 61 distributed along the axial direction, the spiral groove 61 is wrapped on the exterior of the die body 40, one side of the inner wall of the die sleeve 60 close to the die pad 50 is provided with an axial groove 63, one end of the spiral groove 61 is communicated with the spray head 32, the other end of the spiral groove 61 is provided with an exhaust hole, the die body 40 and the die pad 50 are wrapped by the die sleeve 60, when the aluminum bar 70 is extruded, the liquid nitrogen is conveyed to the spiral groove 61 through the output hose 31, then, liquid nitrogen flows forwards along the spiral groove 61 on the surface of the die body 40, and in the flowing process of the liquid nitrogen, the liquid nitrogen is used for cooling, so that the die body 40 can be continuously cooled in the continuous production process, the liquid nitrogen can be fully contacted with the surface of the die body 40, the cooling efficiency is improved, the problem that the product quality is influenced due to continuous heating in production is avoided, the continuous production for a longer time can be realized, and the production efficiency is improved; meanwhile, the liquid nitrogen is changed into nitrogen after being heated, and then the nitrogen is discharged through the vent hole.
Example 3
Referring to fig. 1-6, the present embodiment provides a technical solution: when the aluminum bar 70 is extruded, the liquid nitrogen is conveyed to the spiral groove 61 through the output hose 31, then flows forwards on the surface of the die body 40 along the spiral groove 61, and is cooled through the liquid nitrogen, so that the die body 40 can be continuously cooled in the continuous production process, the problem that the product quality is affected due to continuous heating in the production process is avoided, the continuous production for a longer time can be realized, and the production efficiency is improved; meanwhile, liquid nitrogen still is in a liquid nitrogen state after passing through the spiral groove 61, then the liquid nitrogen uniformly flows into different annular grooves 52 through the axial groove 63, then the liquid nitrogen flows into the through holes 51 through the air overflow holes 53, so that the extruded aluminum bar 70 is filled with the liquid nitrogen, then the liquid nitrogen is vaporized around the aluminum bar 70, a nitrogen protective layer is formed around the aluminum bar 70, the aluminum bar 70 is prevented from directly contacting with oxygen in the air, the surface of the aluminum bar 70 which is just extruded is prevented from generating oxidation reaction, the extruded aluminum bar 70 is protected by generating nitrogen through vaporization of the liquid nitrogen, and the surface of the aluminum bar 70 is prevented from directly contacting with the air and changing color through oxidation.
The working principle is as follows: when the aluminum bar extruding die is used, the aluminum bar is extruded into the aluminum bar 70 through the extruding die mechanism 20, the aluminum bar 70 is extruded through the die cushion 50, liquid nitrogen is conveyed to the spiral groove 61 through the output hose 31 in the process of extruding the aluminum bar 70, then the liquid nitrogen flows forwards along the spiral groove 61 on the surface of the die body 40, and cooling treatment is carried out through liquid nitrogen, so that the temperature of the die body 40 can be continuously reduced in the continuous production process, the problem that the product quality is influenced due to continuous heating in the production process is avoided, the continuous production for a longer time can be realized, and the production efficiency is improved; meanwhile, the liquid nitrogen is heated and changed into nitrogen, and then the nitrogen flows into the axial groove 63; make nitrogen gas evenly flow in different ring groove 52 through axial tank 63, then nitrogen gas flows in to the through hole 51 through spillover hole 53 for be full of nitrogen gas around the aluminium bar 70 after extruding, avoid aluminium bar 70 direct and the oxygen contact in the air, prevent that the aluminium bar 70 surface that has just extruded from producing oxidation reaction, adopt liquid nitrogen cooling to produce nitrogen gas after handling and protect the aluminium bar 70 of extruding, avoid aluminium bar 70 surface direct and air contact and oxidation discoloration.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a mould liquid nitrogen cooling constant temperature extrusion device, includes frame (10), extrusion die mechanism (20), installs liquid nitrogen jar (30) in frame (10), connects output hose (31) on liquid nitrogen jar (30) and is located shower nozzle (32) of output hose (31) free end, extrusion die mechanism (20) set up on frame (10), mould body (40) are installed to extrusion die mechanism (20) output, mould pad (50) are installed to mould body (40) and extrusion die mechanism (20) one side relatively, mould body (40) are fixed by mould cover (60) with the outside of mould pad (50), its characterized in that: the inner wall of the die sleeve (60) is provided with spiral grooves (61) distributed along the axial direction, the spiral grooves (61) are wrapped outside the die body (40), one side, close to the die pad (50), of the inner wall of the die sleeve (60) is provided with axial grooves (63), one end of each spiral groove (61) is communicated with the spray head (32), and the other end of each spiral groove (61) is communicated with the axial grooves (63);
the die cushion is characterized in that a through hole (51) penetrates through the axis of the die cushion (50), annular grooves (52) distributed along the axial direction are uniformly formed in the surface of the die cushion (50), air overflow holes (53) penetrating through the through hole (51) are uniformly formed in the annular grooves (52), and the annular grooves (52) are communicated with the axial grooves (63).
2. The die liquid nitrogen cooling constant temperature extrusion device according to claim 1, characterized in that: an insertion hole (62) used for installing the spray head (32) is formed in one side of the outer portion of the die sleeve (60), and the insertion hole (62) is in through connection with the end portion of the spiral groove (61).
3. The die liquid nitrogen cooling constant temperature extrusion device according to claim 2, characterized in that: a fixing seat (64) is fixedly mounted on one side, surrounding the embedding hole (62), of the outer portion of the mold sleeve (60), the spray head (32) penetrates through the fixing seat (64), a clamping block is arranged on the spray head (32), and a telescopic spring (33) is sleeved on the spray head (32) between the clamping block and the fixing seat (64).
4. The die liquid nitrogen cooling constant temperature extrusion device according to claim 2, characterized in that: and a sealing ring is fixed on the outer edge of the upper end of the embedding hole (62), and an inner hole of the sealing ring is in interference fit with the spray head (32).
5. The die liquid nitrogen cooling constant temperature extrusion device according to claim 2, characterized in that: the embedding hole (62) is matched with the free end of the spray head (32) in shape and is in a taper hole shape.
6. The die liquid nitrogen cooling constant temperature extrusion device according to claim 1, characterized in that: the spiral groove (61) is spiral, and the spiral groove (61) is uniformly wound outside the die body (40).
7. The die liquid nitrogen-cooled constant-temperature extrusion device according to claim 6, characterized in that: the number of spiral turns of the spiral groove (61) is 11, and the pitch of the spiral groove (61) is 3cm.
8. The die liquid nitrogen cooling constant temperature extrusion device according to claim 1, characterized in that: the annular groove (52) is disposed around a circumference of the die pad (50).
9. The die liquid nitrogen cooling constant temperature extrusion device according to claim 8, characterized in that: and air overflow holes (53) in each annular groove (52) are uniformly distributed along the circumferential direction of the die pad (50).
10. The die liquid nitrogen cooling constant temperature extrusion device according to claim 1, characterized in that: the output hose (31) is sequentially provided with an electromagnetic valve, a safety valve, a pressure gauge, a check valve and a pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415116.2A CN115673022A (en) | 2022-11-11 | 2022-11-11 | Liquid nitrogen cooling constant-temperature extrusion device for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415116.2A CN115673022A (en) | 2022-11-11 | 2022-11-11 | Liquid nitrogen cooling constant-temperature extrusion device for mold |
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| CN115673022A true CN115673022A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211415116.2A Pending CN115673022A (en) | 2022-11-11 | 2022-11-11 | Liquid nitrogen cooling constant-temperature extrusion device for mold |
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| CN205110409U (en) * | 2015-10-21 | 2016-03-30 | 湖南苏德材料技术有限公司 | Continuous extrusion die |
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