CN117325309A - Dry powder continuous extrusion pipe body forming machine and continuous extrusion method thereof - Google Patents
Dry powder continuous extrusion pipe body forming machine and continuous extrusion method thereof Download PDFInfo
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- CN117325309A CN117325309A CN202311191863.7A CN202311191863A CN117325309A CN 117325309 A CN117325309 A CN 117325309A CN 202311191863 A CN202311191863 A CN 202311191863A CN 117325309 A CN117325309 A CN 117325309A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 141
- 239000000843 powder Substances 0.000 title claims abstract description 112
- 210000001503 joint Anatomy 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 238000009704 powder extrusion Methods 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 description 11
- 238000003825 pressing Methods 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000009702 powder compression Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/52—Methods or machines specially adapted for the production of tubular articles by extruding
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a dry powder continuous extrusion tube body forming machine which comprises a frame, an extrusion cylinder body part, an extrusion piston part, a mandrel, an extrusion sleeve, a feed hopper, a feed opening and closing structure, a middle supporting seat, a forming die holder and a finished tube blank, wherein the mandrel sleeved by the extrusion piston part is positioned in an inner hole of the extrusion cylinder body part, the inner hole of the extrusion piston part is in sliding fit with the mandrel, the inner hole of the extrusion sleeve is sleeved on the mandrel, the left end of the extrusion sleeve is fixedly connected with the extrusion piston part, the outer circle of the extrusion sleeve is supported on the middle supporting seat in a sliding fit manner, the feed hopper is arranged above a forming cavity, and the feed opening and closing structure is arranged between the feed hopper and a powder outlet as well as the forming cavity. It can continuously extrude and shape the dry powder to obtain the continuously-increased high-precision powder-pressed tube blank. The most critical production equipment is provided for producing the high-precision ceramic pipe fitting in a more energy-saving and more environment-friendly way.
Description
Technical Field
The invention relates to powder forming equipment for pressing pipe fittings by using dry powder, in particular to a powder extrusion forming machine for continuously pressing pipe bodies by using dry powder raw materials.
Background
Along with the development of science and technology, the thin-wall ceramic tube has more and more application scenes, the manufacturing precision of the thin-wall ceramic tube is higher and higher, especially in the fields of electronics, aerospace, military industry, new energy, automobiles, intelligent precision equipment, electric power systems and the like, at present, the thin-wall ceramic tube has two molding schemes, firstly, the thin-wall ceramic tube with small length size is usually molded by dry powder compression and then sintered into porcelain, the ceramic tube obtained by the scheme has high precision, low energy consumption and high production efficiency, but the scheme has strict limitation on the small length size of the thin-wall ceramic tube, the precision requirement of the ceramic tube with the length-diameter ratio of more than 5 cannot be ensured, especially the pressing density of powder cannot be uniform, meanwhile, the length size of the product is single and cannot be changed, otherwise, a more corresponding pressing molding die is needed, the pressing tube blank has a plurality of dies, the technical preparation time is long, the arbitrary length of ceramic tube cannot be realized, and the arbitrary requirement of the tube length cannot be met by customers.
The second scheme is to adopt wet pipe blank making technology, and the main process of making the pipe blank is as follows:
the method comprises the steps of mixing ceramic powder with water and an adhesive to form pug, continuously extruding the pug with a plastic extruder to obtain a wet pug-shaped tube blank, outputting the pug-shaped tube blank by a guide wheel conveying line, cutting the wet pug-shaped tube blank according to the requirements of people, heating, dehydrating and hardening the wet pug-shaped tube blank, and performing surface cutting (improving the accuracy of an outer circle and the accuracy of a length, namely firing and forming the accurate ceramic pug tube).
According to the prior art, dry powder continuous precise extrusion cannot be adopted for the thin-wall porcelain tube, and the thin-wall porcelain tube is sintered into the slender tube porcelain with randomly set length with low energy consumption. Through searching, no method for continuously extruding and processing ceramic tube blank by using dry ceramic powder and corresponding processing equipment are available at home and abroad.
For the rapid increase of powder sintered material tubing such as elongated high precision ceramic tubes, there is a market for powder compression molding equipment capable of continuously compressing like plastic extruders.
The method is widely known to be long in process route, high in energy consumption and low in processing precision, and cannot be used for producing the slender pipe fitting with the ultrathin pipe wall. Along with the rapid development of industries such as electronics, aerospace, high-technology equipment, military industry and the like, the application range of the slender powder pressing parts is more and more common, and for the rapid increase of powder sintering material tube materials such as slender high-precision ceramic tubes and the like, powder pressing forming equipment capable of continuously pressing like a plastic extruder is required in the market.
Therefore, the applicant invents a dry powder continuous extrusion tube body forming machine and a continuous extrusion method thereof, which can utilize dry powder to carry out continuous growth extrusion forming processing of high-precision ceramic tube blanks so as to adapt to the production requirements of the existing ceramic tubes which are energy-saving, environment-friendly, high-precision and high-efficiency.
Disclosure of Invention
The invention provides a dry powder continuous extrusion tube body forming machine which can continuously extrude and form dry powder to obtain a continuously-increased high-precision powder extrusion tube blank. The most critical production equipment is provided for producing the high-precision ceramic pipe fitting in a more energy-saving and more environment-friendly way.
The technical scheme adopted by the invention is as follows:
the utility model provides a dry powder continuous extrusion body make-up machine, which comprises a frame, extrusion cylinder body part, extrusion piston part, the dabber, the extrusion cover, the feeder hopper, feeding opening and closing structure, the intermediate strut seat, shaping die holder and finished product tube blank, extrusion cylinder body part is fixed in the frame, the dabber level sets up, the dabber of extrusion piston part suit is epaxial and is arranged in the hole of extrusion cylinder body part, be accurate sliding fit between the hole of extrusion piston part and the dabber, the outer circle of extrusion piston part and the accurate sliding fit of hole of extrusion cylinder body part, the hole suit of extrusion cover is on the dabber, the left end and the fixed connection of extrusion piston part of extrusion cover, the outer circle of extrusion cover supports on the intermediate strut seat with sliding fit mode, the shaping die holder sets up on the right side of intermediate strut seat and fixes in the frame, the axis coincidence of shaping die cavity of shaping die holder and dabber, the feeder hopper sets up in the top of shaping die cavity, be equipped with feeding opening and closing structure between feeder hopper and meal outlet and shaping cavity.
Further, extrusion cylinder body part includes fixing base, cylinder liner, left end cover, piston chamber and left supporting hole, extrusion piston part includes piston and piston rod, and fixing base, cylinder liner and left end cover seal enclose into the piston chamber, and the piston is located the piston chamber, and piston rod and the coaxial fixed connection of piston, the hole of piston rod and the first cooperation section sliding fit of dabber, the excircle and the left supporting hole sliding fit of fixing base of piston rod.
Further, the dabber includes fixed connection section, first cooperation section and second cooperation section, and extrusion piston part suit is on the first cooperation section of dabber, and the hole suit of extrusion cover is on the second cooperation section, and extrusion cover's left end and extrusion piston part's right-hand member fixed connection.
Further, the feeding opening and closing structure comprises an inserting and moving plate and a driving part, the inserting and moving plate is arranged at the lower end of the powder outlet of the feeding hopper, and the inserting and moving plate is driven by the driving part to reciprocate along the horizontal direction, so that the powder outlet of the feeding hopper is opened and closed.
Further, the middle supporting seat comprises a seat body and a butt joint bushing, an outer circle of the extrusion sleeve sleeved on the second matching section of the mandrel is supported on the seat body through the butt joint bushing, a slot is formed in the upper side wall of an inner hole of the butt joint bushing, a plug board is arranged in the slot, a powder inlet communicated with a powder outlet of the feeding hopper is formed in the upper side wall of the butt joint bushing, the forming seat comprises a forming cavity, a fixing seat and a forming die sleeve, the forming die sleeve is arranged on the fixing seat, a space formed between a horizontal inner hole on the forming die sleeve and the second matching section of the mandrel is a forming cavity of a finished tube blank, and the right end of the butt joint bushing is coaxially butted with the forming die sleeve.
Further, a wear-resistant sleeve and an axial adjusting sleeve are arranged between a horizontal inner hole on the forming die sleeve and a second matching section of the mandrel, the outer diameter size of a finished tube blank can be changed and the service life of the forming die sleeve is prolonged by additionally arranging the wear-resistant sleeve, and the purpose of additionally arranging the axial adjusting sleeve is to adjust the axial friction force during extrusion.
Further, the base body in the intermediate support base is fixed on the frame or on the extrusion cylinder body component or on the molding die holder.
Further, the seat body in the middle supporting seat is fixed on the frame.
Further, the driving part in the feeding start-stop structure is an oil cylinder or an air cylinder.
The continuous extrusion method of the dry powder continuous extrusion tube body forming machine is characterized by comprising the following steps of: the method comprises the following steps:
step one: powder containing cavity is formed:
the extrusion piston part and the extrusion sleeve are controlled to move leftwards, so that the right end of the extrusion sleeve moves to the left side of a powder outlet of the feeding hopper, a driving part in the feeding start-stop structure is controlled, the insertion plate is inserted rightwards, the powder outlet of the feeding hopper 6 is closed, a powder containing cavity is formed between the second matching section of the mandrel and the butt joint bushing, and two ends of the powder containing cavity are respectively sealed and isolated by the right end of the extrusion sleeve and a finished tube blank;
step two, adding powder:
pouring powder to be pressed into a feed hopper, and ensuring that the powder amount in the feed hopper is larger than the powder amount for forming a stamping unit;
filling powder:
starting a driving part in the feeding opening and closing structure to enable the inserting and moving plate to be inserted and moved leftwards, opening a powder outlet of the feeding hopper to enable powder in the feeding hopper to flow into the powder containing cavity, and then controlling the driving part in the feeding opening and closing structure to enable the inserting and moving plate to be inserted and moved rightwards, closing the powder outlet of the feeding hopper, and providing sufficient powder for the next extrusion molding; step four, unit extrusion:
controlling the extrusion piston component to move rightwards, and driving the extrusion sleeve to move rightwards by the extrusion piston component, so that the right end of the extrusion sleeve axially extrudes the powder in the powder containing cavity, and a pipe body unit formed by one extrusion stroke is increased;
the four steps reciprocate circularly to form a continuously-increased powder extrusion tube blank obtained by continuously extruding the powder, and the dry powder extrusion tube blank obtained by adopting the equipment not only has the length capable of being increased randomly, but also has high precision, and the length of the tube blank can be cut randomly as required in the subsequent tube sintering process due to the extremely low water content in the finished tube blank, so that the sintering energy consumption is lower and the precision is higher.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a structure of the extrusion cylinder part of the present invention.
FIG. 3 is a schematic view of the structure of the extrusion sleeve and the mandrel in the invention.
Fig. 4 is a schematic structural view of the powder containing cavity in the powder feeding and filling state, wherein the extrusion sleeve and the inserting and moving plate are moved to the left to the limit position, the powder outlet of the feeding hopper is in an open state, and the powder containing cavity is subjected to powder feeding and filling.
FIG. 5 is an enlarged schematic cross-sectional view of the docking sleeve at position A-A in FIG. 4.
Fig. 6 is a schematic view of the structure of the insertion plate of fig. 4 when the powder outlet of the feeding hopper is in a closed state.
In the figure: 1-a frame; 2-extruding a cylinder part; 3-pressing the piston member; 4-a mandrel; 5-extruding the sleeve; 6-feeding a hopper; 7-a feeding start-stop structure; 8-an intermediate support seat; 9-forming a die holder; 10-forming a finished tube blank; 11-a wear-resistant sleeve; 12-an axial adjusting sleeve; 13-a powder containing cavity; 21-a fixed seat; 22-cylinder sleeve; 23-left end cap; 24-piston chamber; 25-left support holes; 31-a piston; 32-a piston rod; 41-a fixed connection section;
42-a first mating segment; 43-a second mating segment; 71-inserting and moving plates; 72-a drive member; 81-a base;
82-butting bushings; 83-slots; 84-a powder inlet; 91-forming a cavity; 92-fixing seat; 93-forming the die sleeve.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The utility model provides a dry powder continuous extrusion body make-up machine, as shown in fig. 1-6, including frame 1, extrusion cylinder body part 2, extrusion piston part 3, dabber 4, extrusion cover 5, feeder hopper 6, feeding opening and closing structure 7, intermediate support seat 8, shaping die holder 9 and finished product tube blank 10, extrusion cylinder body part 2 is fixed on frame 1, dabber 4 level sets up, on the dabber 4 of extrusion piston part 3 suit and be arranged in the hole of extrusion cylinder body part 2, be accurate sliding fit between the hole of extrusion piston part 3 and dabber 4, the outer circle of extrusion piston part 3 and the hole of extrusion cylinder body part 2 accurate sliding fit, the hole cover of extrusion cover 5 is adorned on dabber 4, the left end of extrusion cover 5 and the fixed connection of extrusion piston part 3, the outer circle of extrusion cover 5 supports on intermediate support seat 8 with sliding fit, shaping die holder 9 sets up on intermediate support seat 8's right side and is fixed on frame 1, the axis of the shaping chamber 91 of shaping die holder 9 and the axis coincidence of dabber 4, the feeder hopper 6 sets up in the top of shaping die cavity 91, be equipped with feeding structure 7 between feeder hopper 6 and powder outlet opening and closing chamber 91.
The extrusion cylinder body part 2 comprises a fixed seat 21, a cylinder sleeve 22, a left end cover 23, a piston cavity 24 and a left supporting hole 25, the extrusion piston part 3 comprises a piston 31 and a piston rod 32, the fixed seat 21, the cylinder sleeve 22 and the left end cover 23 are sealed to form the piston cavity 24, the piston 31 is positioned in the piston cavity 24, the piston rod 32 is fixedly connected with the piston 31 coaxially, an inner hole of the piston rod 32 is in sliding fit with a first matching section 42 of the mandrel 4, and an outer circle of the piston rod 32 is in sliding fit with the left supporting hole 25 of the fixed seat 21.
The mandrel 4 comprises a fixed connection section 41, a first matching section 42 and a second matching section 43, the extrusion piston part 3 is sleeved on the first matching section 42 of the mandrel 4, an inner hole of the extrusion sleeve 5 is sleeved on the second matching section 43, and the left end of the extrusion sleeve 5 is fixedly connected with the right end of the extrusion piston part 3.
The feeding opening and closing structure 7 comprises an inserting and moving plate 71 and a driving part 72, the inserting and moving plate 71 is arranged at the lower end of the powder outlet of the feeding hopper 6, and the inserting and moving plate 71 is driven by the driving part 72 to reciprocate along the horizontal direction, so that the powder outlet of the feeding hopper 6 is opened and closed.
The middle supporting seat 8 comprises a seat body 81 and a butt joint bushing 82, the outer circle of the extrusion sleeve 5 sleeved on the second matching section 43 of the mandrel 4 is supported on the seat body 81 through the butt joint bushing 82, a slot 83 is formed in the upper side wall of an inner hole of the butt joint bushing 82, a plug board 71 is arranged in the slot 83, a powder inlet 84 communicated with a powder outlet of the feeding hopper 6 is formed in the upper side wall of the butt joint bushing 82, the molding die holder 9 comprises a molding cavity 91, a fixing seat 92 and a molding die sleeve 93, the molding die sleeve 93 is arranged on the fixing seat 92, a space formed between a horizontal inner hole on the molding die sleeve 93 and the second matching section 43 of the mandrel 4 is a molding cavity 91 of the finished tube blank 10, and the right end of the butt joint bushing 82 is coaxially butted with the molding die sleeve 93. The wear-resistant sleeve 11 and the axial adjusting sleeve 12 are arranged between the horizontal inner hole on the forming die sleeve 93 and the second matching section 43 of the mandrel 4, the outer diameter size of the finished tube blank 10 can be changed and the service life of the forming die sleeve 93 can be prolonged by additionally arranging the wear-resistant sleeve 11, the purpose of additionally arranging the axial adjusting sleeve 12 is to adjust the axial friction force during extrusion, and the driving part 72 in the feeding opening and closing structure 7 is an oil cylinder.
In this case, the seat 81 in the intermediate support 8 can be fixed either to the frame 1 or to the extrusion cylinder part 2 or to the forming die holder 9.
In this case, the seat 81 in the intermediate support seat 8 is fixed to the extrusion cylinder part 2 by six horizontal connecting rods 14.
And all that is not described in detail in this specification is well known to those skilled in the art.
The continuous extrusion method of the dry powder continuous extrusion tube body forming machine is characterized by comprising the following steps of: the method comprises the following steps:
step one: powder containing cavity is formed:
the extrusion piston part 3 is controlled to retract leftwards together with the extrusion sleeve 5, so that the right end of the extrusion sleeve 5 moves to the left side of a powder outlet of the feed hopper 6, the driving part 72 in the feeding start-stop structure 7 is controlled, the insertion plate 71 is inserted rightwards, the powder outlet of the feed hopper 6 is closed, a powder containing cavity 13 is formed between the second matching section 43 of the mandrel 4 and the butt joint bushing 82, and two ends of the powder containing cavity 13 are respectively sealed by the right end of the extrusion sleeve 5 and the finished tube blank 10; step two, adding powder:
pouring powder to be pressed into a feed hopper 6, and ensuring that the powder amount in the feed hopper 6 is larger than the powder amount for forming a stamping unit;
filling powder:
starting a driving part 72 in the feeding opening and closing structure 7 to enable the inserting and moving plate 71 to be inserted and moved leftwards, opening a powder outlet of the feeding hopper 6 to enable powder in the feeding hopper 6 to flow into the powder containing cavity 13, and then controlling the driving part 72 in the feeding opening and closing structure 7 to enable the inserting and moving plate 71 to be inserted and moved rightwards to close the powder outlet of the feeding hopper 6 so as to provide sufficient powder for the next extrusion molding;
step four, unit extrusion:
the extrusion piston part 3 is controlled to move rightwards, the extrusion piston part 3 drives the extrusion sleeve 5 to move rightwards, and the right end of the extrusion sleeve 5 axially extrudes the powder in the powder containing cavity 13, so that a pipe body unit formed by one extrusion stroke is increased;
the four steps reciprocate circularly to form a continuously-increased powder extrusion tube blank obtained by continuously extruding powder, and the dry powder extrusion tube blank obtained by adopting the equipment not only has the length capable of being increased randomly, but also has high precision, and the length of the tube blank can be cut randomly as required in the subsequent tube-making and firing process due to the extremely low water content in the finished tube blank 10, so that the firing energy consumption is lower and the precision is higher.
The embodiment of the invention is not limited to the above example, and all schemes of adopting an axial continuous extrusion mode to extrude the dry powder body and enabling the length of the obtained powder tube blank to be continuous belong to the equivalent technical scheme of the invention and belong to the protection scope of the invention.
Claims (10)
1. A dry powder continuous extrusion tube body forming machine is characterized in that: comprises a frame (1), an extrusion cylinder body part (2), an extrusion piston part (3), a mandrel (4), an extrusion sleeve (5), a feed hopper (6), a feeding opening and closing structure (7), an intermediate supporting seat (8), a molding die holder (9) and a finished tube blank (10), wherein the extrusion cylinder body part (2) is fixed on the frame (1), the mandrel (4) is horizontally arranged, the sleeved mandrel (4) of the extrusion piston part (3) is positioned in an inner hole of the extrusion cylinder body part (2), the inner hole of the extrusion piston part (3) is in precise sliding fit with the mandrel (4), the outer circle of the extrusion piston part (3) is in precise sliding fit with the inner hole of the extrusion cylinder body part (2), the inner hole of the extrusion sleeve (5) is sleeved on the mandrel (4), the left end of the extrusion sleeve (5) is fixedly connected with the extrusion piston part (3), the outer circle of the extrusion sleeve (5) is supported on the intermediate supporting seat (8) in a sliding fit manner, the molding die holder (9) is arranged on the right side of the intermediate supporting seat (8) and is fixed on the frame (1), the axis of a molding cavity (91) of the molding die holder (9) coincides with the axis of the mandrel (6) in the direction of the axis of the mandrel (91), a feeding opening and closing structure (7) is arranged between the feeding hopper (6) and the powder outlet and the forming cavity (91).
2. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the extrusion cylinder body part (2) comprises a fixed seat (21), a cylinder sleeve (22), a left end cover (23), a piston cavity (24) and a left supporting hole (25), the extrusion piston part (3) comprises a piston (31) and a piston rod (32), the fixed seat (21), the cylinder sleeve (22) and the left end cover (23) are sealed to form the piston cavity (24), the piston (31) is located in the piston cavity (24), the piston rod (32) is fixedly connected with the piston (31) coaxially, an inner hole of the piston rod (32) is in sliding fit with a first matching section (42) of the mandrel (4), and an outer circle of the piston rod (32) is in sliding fit with the left supporting hole (25) of the fixed seat (21).
3. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the mandrel (4) comprises a fixed connection section (41), a first matching section (42) and a second matching section (43), the extrusion piston component (3) is sleeved on the first matching section (42) of the mandrel (4), an inner hole of the extrusion sleeve (5) is sleeved on the second matching section (43), and the left end of the extrusion sleeve (5) is fixedly connected with the right end of the extrusion piston component (3).
4. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the feeding start-stop structure (7) comprises an inserting and moving plate (71) and a driving part (72), wherein the inserting and moving plate (71) is arranged at the lower end of a powder outlet of the feeding hopper (6), and the inserting and moving plate (71) is driven by the driving part (72) to reciprocate along the horizontal direction so as to realize the opening and closing of the powder outlet of the feeding hopper (6).
5. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the middle supporting seat (8) comprises a seat body (81) and a butt joint lining (82), an outer circle of an extrusion sleeve (5) sleeved on a second matching section 43 of the mandrel (4) is supported on the seat body (81) through the butt joint lining (82), a slot (83) is formed in the upper side wall of an inner hole of the butt joint lining (82), an inserting and moving plate (71) is arranged in the slot (83), a powder inlet (84) communicated with a powder outlet of the feeding hopper (6) is formed in the upper side wall of the butt joint lining (82), the forming die holder (9) comprises a forming cavity (91), a fixing seat (92) and a forming die sleeve (93), the forming die sleeve (93) is arranged on the fixing seat (92), and a space formed between a horizontal inner hole on the forming die sleeve (93) and the second matching section of the mandrel (4) is a forming cavity (91) of a finished tube blank (10), and the right end of the butt joint lining (82) is coaxially abutted with the forming die sleeve (93).
6. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: a wear-resistant sleeve (11) and an axial adjusting sleeve (12) are arranged between a horizontal inner hole on the forming die sleeve (93) and a second matching section (43) of the mandrel (4), the wear-resistant sleeve (11) is additionally arranged to change the outer diameter size of a finished tube blank (10) and prolong the service life of the forming die sleeve (93), and the axial adjusting sleeve (12) is additionally arranged to adjust the axial friction force during extrusion.
7. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the base body (81) in the middle supporting base (8) is fixed on the frame (1) or the extrusion cylinder body component (2) or the forming die holder (9).
8. The dry powder continuous extrusion tube body forming machine as claimed in claim 7, wherein: the base body (81) in the middle supporting base (8) is fixed on the frame (1).
9. A dry powder continuous extrusion tube body forming machine as claimed in claim 1, wherein: the driving part (72) in the feeding start-stop structure (7) is an oil cylinder or an air cylinder.
10. A continuous extrusion method of a dry powder continuous extrusion tube body forming machine as claimed in claim 1, characterized in that: the method comprises the following steps:
step one: powder containing cavity is formed:
the extrusion piston part (3) is controlled to retract leftwards together with the extrusion sleeve (5), the right end of the extrusion sleeve (5) is moved to the left side of a powder outlet of the feed hopper (6), the driving part (72) in the feeding start-stop structure (7) is controlled, the inserting and moving plate (71) is inserted and moved rightwards, the powder outlet of the feed hopper (6) is closed, a powder containing cavity (13) is formed between the second matching section (43) of the mandrel (4) and the butt joint lining (82), and two ends of the powder containing cavity (13) are respectively sealed by the right end of the extrusion sleeve (5) and a finished tube blank (10);
step two, adding powder:
pouring powder to be pressed into a feed hopper (6), and ensuring that the powder amount in the feed hopper (6) is larger than the powder amount for forming a stamping unit;
filling powder:
starting a driving part (72) in the feeding opening and closing structure (7), enabling the inserting and moving plate (71) to be inserted and moved leftwards, opening a powder outlet of the feeding hopper (6), enabling powder in the feeding hopper (6) to flow into the powder containing cavity (13), then controlling the driving part (72) in the feeding opening and closing structure (7), enabling the inserting and moving plate (71) to be inserted and moved rightwards, closing the powder outlet of the feeding hopper (6), and providing sufficient powder for the next extrusion molding;
step four, unit extrusion:
the extrusion piston component (3) is controlled to move rightwards, the extrusion piston component (3) drives the extrusion sleeve (5) to move rightwards, and the right end of the extrusion sleeve (5) axially extrudes the powder in the powder containing cavity (13), so that a pipe body unit formed by one extrusion stroke is increased;
the four steps are circulated and reciprocated to form a continuously-increased powder extrusion tube blank obtained by continuously extruding the powder, and the length of the dry powder extrusion tube blank obtained by adopting the equipment can be increased at will, so that the geometric precision is high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311191863.7A CN117325309A (en) | 2023-09-14 | 2023-09-14 | Dry powder continuous extrusion pipe body forming machine and continuous extrusion method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311191863.7A CN117325309A (en) | 2023-09-14 | 2023-09-14 | Dry powder continuous extrusion pipe body forming machine and continuous extrusion method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117325309A true CN117325309A (en) | 2024-01-02 |
Family
ID=89294280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311191863.7A Pending CN117325309A (en) | 2023-09-14 | 2023-09-14 | Dry powder continuous extrusion pipe body forming machine and continuous extrusion method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117325309A (en) |
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2023
- 2023-09-14 CN CN202311191863.7A patent/CN117325309A/en active Pending
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