CN116441340B - Hot-pressed iron block manufacturing device and manufacturing method thereof - Google Patents
Hot-pressed iron block manufacturing device and manufacturing method thereof Download PDFInfo
- Publication number
- CN116441340B CN116441340B CN202310463716.4A CN202310463716A CN116441340B CN 116441340 B CN116441340 B CN 116441340B CN 202310463716 A CN202310463716 A CN 202310463716A CN 116441340 B CN116441340 B CN 116441340B
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- hot
- box body
- cooling
- plates
- inner box
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 230000000712 assembly Effects 0.000 claims abstract description 20
- 238000000429 assembly Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 238000007731 hot pressing Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000003139 buffering effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Press Drives And Press Lines (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a hot-pressed iron block manufacturing device and a manufacturing method thereof, belonging to the technical field of hot-pressed iron block production, wherein the device comprises a rotary hearth and a cooling device connected with an outlet of the rotary hearth, the cooling device comprises an inner box body and two groups of cooling forming components arranged in the inner box body, the cooling forming components comprise hollow shafts, the hollow shafts are driven to rotate by a rotation driving device, the hollow shafts are in rotary fit with the inner box body, and the hollow shafts of the two groups of cooling forming components are arranged in the box body at intervals; the outer side of the hollow shaft is fixedly provided with a hot-press forming plate, the hot-press forming plate is spirally and fixedly sleeved on the outer side of the hollow shaft, the hot-press forming plates of the two groups of cooling forming assemblies are in cross fit, and the hot-press forming plates of the two groups of cooling forming assemblies can be matched to press and convey the hot-press iron blocks when the hollow shaft rotates. The device and the method can cool the hot-pressed iron more properly, so as to avoid the problems of cracking and the like of the hot-pressed iron during manufacturing.
Description
Technical Field
The invention belongs to the technical field of hot-pressed iron block production, and particularly relates to a hot-pressed iron block manufacturing device and a manufacturing method thereof.
Background
Hot iron briquette (HBI) is a product formed by compacting DRI to increase its density and to have a certain size and shape. Direct reduced iron and hot-briquette iron are raw materials for electric furnace steelmaking. In the conventional apparatus for manufacturing hot-pressed iron, it is necessary to cool the high-temperature reduced iron discharged from the reduction furnace to some extent and then perform hot forming. However, when the reduced iron is cooled rapidly or excessively by using a coolant, the reduced iron tends to deteriorate in hardening formability, and the later iron nuggets are difficult to mold.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an apparatus and a method for manufacturing a hot-pressed iron block, which can cool the hot-pressed iron more appropriately to avoid problems such as cracking of the hot-pressed iron during manufacturing.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The invention discloses a hot-pressed iron block manufacturing device, which comprises a rotary hearth and a cooling device connected with an outlet of the rotary hearth, wherein the cooling device comprises an inner box body and two groups of cooling forming assemblies arranged in the inner box body, the cooling forming assemblies comprise hollow shafts, the hollow shafts are driven to rotate by a rotation driving device, the hollow shafts are in rotary fit with the inner box body, and the hollow shafts of the two groups of cooling forming assemblies are arranged in the box body at intervals; one end of the hollow shaft is provided with a water inlet, the other end of the hollow shaft is provided with a water outlet, and the water inlet and the water outlet are simultaneously connected with a cooling water circulation device; the hot-press forming plate is fixed on the outer side of the hollow shaft, the hot-press forming plate is spirally and fixedly sleeved on the outer side of the hollow shaft, the hot-press forming plates of the two groups of cooling forming assemblies are in cross fit, and the hot-press forming plates of the two groups of cooling forming assemblies can be matched to press and convey the hot-press iron blocks when the hollow shaft rotates.
Further, the upper end opening of interior box, the outer edge of hot briquetting board has at least part to expose the opening, the opening part of interior box is provided with elasticity spacing subassembly, elasticity spacing subassembly is used for spacing the hot briquetting piece.
Further, the elastic limiting assembly comprises a pressing plate, the pressing plate is connected with the box body through a plurality of groups of elastic buffering assemblies, the elastic buffering assemblies comprise end plates, guide rods, limiting plates and first springs, through holes are formed in the pressing plate, the upper ends of the guide rods are fixedly connected with the end plates, the lower ends of the guide rods penetrate through the through holes and then are fixedly connected with the box body, the limiting plates are located on the lower sides of the pressing plate and are fixedly connected with the guide rods, the first springs are sleeved on the outer sides of the guide rods, and the two ends of the first springs are respectively abutted to the end plates and the pressing plates.
Further, the pressing plate comprises an inclined pressing plate and a straight pressing plate fixed at one end of the inclined pressing plate, and the upper end of the inclined pressing plate faces to the feeding side of the hot pressing iron block.
Further, the inner box body is formed by sequentially splicing a plurality of box sections along the length direction of the inner box body, an outer box body is arranged on the lower side of the inner box body, and a second spring is arranged between the box sections and the outer box body.
Further, the trompil has been seted up to the bottom of case section, the trompil is fixed to be provided with the frame, be provided with a plurality of first grid steel sheets along linear array on the frame, correspond the bottom of outer box is provided with a plurality of second grid steel sheets along linear array, staggered arrangement between first grid steel sheet and the second grid steel sheet, close contact between first grid steel sheet and the adjacent second grid steel sheet.
Further, a cooling liquid is arranged in the outer box body, and the second grid steel plate is simultaneously contacted with the cooling liquid.
The manufacturing method of the hot-pressed iron block comprises the steps of continuously conveying reduced iron raw materials in a rotary hearth, manufacturing high-temperature reduced iron through the rotary hearth, and finally carrying out hot pressing while cooling the high-temperature reduced iron through a cooling device, so that the manufacturing of the hot-pressed iron block is realized.
The invention has the beneficial effects that:
According to the hot-pressed iron block manufacturing device, the rotary hearth is used for manufacturing the high-temperature reduced iron, and then the cooling device is used for cooling the high-temperature reduced iron and simultaneously carrying out hot pressing, so that the direct cooling by using a coolant is avoided, the high-temperature reduced iron is guaranteed to have certain plasticity in hot pressing, hot pressing can be facilitated, and the problems of cracks and the like in manufacturing of the hot-pressed iron are avoided.
In the device, the hot press forming plates of the two groups of cooling forming assemblies are in cross fit, the hot press iron blocks can be axially conveyed through spiral rotation in a spiral fit mode, and the hot press iron blocks can be cooled through a hollow pipe through which cooling liquid can be introduced. The device adopts the two shafts to match with the two hot pressing plates, and the hot pressing iron block can be formed by hot pressing between the two hot pressing plates, so that the effects of conveying, cooling and forming are realized, the hot pressing quality is ensured, and meanwhile, the production efficiency is greatly improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a schematic structural view of a cooling device;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view of an arrangement of cooling forming assemblies;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a schematic view of a structure of a hot press forming plate;
fig. 7 is a schematic structural view of the tank section.
The figures are marked as follows: the rotary hearth 1, the cooling device 2, the inner box body 3, the cooling forming assembly 4, the hollow shaft 5, the rotary driving device 6, the water inlet 7, the water outlet 8, the hot press forming plate 9, the elastic limiting assembly 10, the elastic buffer assembly 11, the end plate 12, the guide rod 13, the limiting plate 14, the first spring 15, the through hole 16, the inclined pressing plate 17, the straight pressing plate 18, the box section 19, the outer box body 20, the second spring 21, the opening 22, the outer frame 23, the first grid steel plate 24 and the second grid steel plate 25.
Detailed Description
As shown in fig. 1 to 7, the hot-pressed iron block manufacturing device of the invention comprises a rotary hearth 1 and a cooling device 2 connected with an outlet of the rotary hearth 1, wherein the rotary hearth 1 adopts the existing structure and is used for heating and reducing a reduced iron raw material to manufacture high-temperature reduced iron, a discharge hole of the rotary hearth 1 is directly connected with the cooling device 2, and after the reduced iron is finished, the reduced iron enters the cooling device 2 to be directly cooled and hot-pressed to keep the time of hot-pressed molding.
Specifically, cooling device 2 includes interior box 3, sets up two sets of cooling shaping subassemblies 4 at interior box 3, and interior box 3 is rectangular structure, and cooling shaping subassembly 4 includes hollow shaft 5, and hollow shaft 5 is the circular shaft structure, and hollow shaft 5 sets up along the length direction of interior box 3, and hollow shaft 5 drives through rotation drive arrangement 6 and rotates, and hollow shaft 5 and interior box 3 normal running fit, the hollow shaft 5 of two sets of cooling shaping subassemblies 4 separate and set up in the box, and both are at coplanar height. The rotation driving device 6 comprises a sun gear and a motor for driving the sun gear to rotate, the motor is fixed on the outer side face of the inner box body 3, the sun gear is meshed with an outer gear, the outer gear is coaxially connected with the hollow shafts 5, of course, two hollow shafts 5 are respectively connected with the outer gears, and one sun gear is meshed with the two outer gears at the same time.
Wherein, one end of the hollow shaft 5 forms a water inlet 7, the other end forms a water outlet 8, and both ends of the water inlet 7 and the water outlet 8 extend out of the inner box body 3 and are simultaneously connected with a cooling water circulation device, and the cooling water is continuously introduced into the hollow shaft 5 to realize the function of cooling the hollow shaft 5 and the inner part of the inner box body 3; the outside of the hollow shaft 5 is fixed with a hot-press forming plate 9, the hot-press forming plate 9 is spiral, the center of the hot-press forming plate 9 is fixedly sleeved on the outside of the hollow shaft 5, and the hot-press forming plate 9 has a certain thickness so as to avoid deformation of the hot-press forming plate 9 during hot pressing. The hot press forming plates 9 of the two groups of cooling forming assemblies 4 are in cross fit, the rotation speed and the frequency are completely consistent, mutual interference is avoided, and the hot press forming plates 9 of the two groups of cooling forming assemblies 4 can be matched to press and convey hot press iron blocks when the hollow shaft 5 rotates. The hot-pressing iron block can be subjected to hot-pressing forming between two hot-pressing plates, so that the effects of conveying, cooling and forming are achieved, the hot-pressing quality is ensured, and meanwhile, the production efficiency is greatly improved.
In this embodiment, the upper end opening of interior box 3, the outer edge of hot briquetting board 9 has the partial opening of exposing at least, and the opening part of interior box 3 is provided with elasticity spacing subassembly 10, and elasticity spacing subassembly 10 is used for spacing the hot pressing iron plate, and the hot pressing iron plate is carrying the initial stage, and the position can not obtain fine location, also can carry out spacingly to the hot pressing iron plate through elasticity spacing subassembly 10, can guarantee its and hollow tube and the fine contact of hot briquetting board, makes it carry out subsequent process better.
In this embodiment, the elastic limiting component 10 includes a pressing plate, the pressing plate includes an inclined pressing plate 17, a straight pressing plate 18 fixed at one end of the inclined pressing plate 17, and an opening is formed between the inclined pressing plate 17 and the straight pressing plate 18, so as to facilitate the entry of materials, and meanwhile, a certain buffer space is formed for the hot pressing iron block, so that an inclined inlet is formed, the hot pressing iron block can be better input, and the possibility of blocking a shell is prevented.
Simultaneously, the upper end of inclined pressing plate 17 is towards the feed side of hot pressing iron block, connects through a plurality of elastic buffer assembly 11 of group between clamp plate and the box, realizes elastic buffering through elastic buffer assembly 11, avoids hard contact between hot pressing iron block and the clamp plate to lead to its destruction. Wherein, elastic buffer assembly 11 includes end plate 12, guide arm 13, limiting plate 14 and first spring 15, end plate 12 is located the upper end of guide arm 13, through-hole 16 has been seted up on the clamp plate, the lower extreme of guide arm 13 passes through-hole 16 back fixed connection to the box, limiting plate 14 is located the downside of clamp plate and with guide arm 13 fixed connection, first spring 15 cover is established in the outside of guide arm 13, the both ends of first spring 15 respectively with end plate 12 and clamp plate butt, when the hot pressing iron plate disturbance clamp plate, the clamp plate can upwards move in order to compress first spring 15, realize flexible buffering. The diameter of the through hole 16 is larger than that of the guide rod 13 so that the pressing plate has a certain deflection space.
In this embodiment, the inner box 3 is formed by sequentially splicing a plurality of box sections 19 along the length direction of the inner box 3, an outer box 20 is arranged at the lower side of the inner box 3, and a second spring 21 is arranged between the box sections 19 and the outer box 20. When the clamp plate receives the disturbance of hot pressing iron plate, the clamp plate can drive the case section 19 action simultaneously, and case section 19 can be for outer box 20 individual movement, and the air in the interior box 3 can be disturbed in case section 19 removal, makes it can better circulation in order to guarantee better refrigeration function. By providing the multi-section box section 19, the inner box body 3 can be conveniently installed.
In this embodiment, the bottom of the box section 19 is provided with the opening 22, the opening 22 is fixedly provided with the outer frame 23, a plurality of first grid steel plates 24 are arranged on the outer frame 23 along the linear array, a plurality of second grid steel plates 25 are arranged on the bottom of the outer box body 20 along the linear array correspondingly, heat of air in the inner box body 3 can be transferred to the middle of the second grid steel plates 25 through the first grid steel plates 24, then the air is cooled through the second grid steel plates 25, the first grid steel plates 24 and the second grid steel plates 25 are arranged in a staggered manner, and the first grid steel plates 24 are in close contact with the adjacent second grid steel plates 25. The first grille steel plate 24 and the second grille steel plate 25 can simultaneously transfer impurities in the inner box body 3 into the outer box body 20 while moving in a cross manner, so that the inner box body 3 is convenient to keep clean, and the hot-pressing environment of hot-pressing iron blocks is ensured.
In this embodiment, the cooling liquid is disposed in the outer case 20, and the second grid steel plate 25 is in contact with the cooling liquid at the same time, so that the second grid steel plate 25 can be cooled well, and preferably, the cooling liquid can be set to be replaceable at any time.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (2)
1. The hot-pressed iron block manufacturing device is characterized by comprising a rotary hearth and a cooling device connected with an outlet of the rotary hearth, wherein the cooling device comprises an inner box body and two groups of cooling forming assemblies arranged in the inner box body, the cooling forming assemblies comprise hollow shafts, the hollow shafts are driven to rotate by a rotation driving device, the hollow shafts are in rotary fit with the inner box body, and the hollow shafts of the two groups of cooling forming assemblies are arranged in the inner box body at intervals; one end of the hollow shaft is provided with a water inlet, the other end of the hollow shaft is provided with a water outlet, and the water inlet and the water outlet are simultaneously connected with a cooling water circulation device; the hot-press forming plates are fixed on the outer side of the hollow shaft, the hot-press forming plates are spiral, the centers of the hot-press forming plates are fixedly sleeved on the outer side of the hollow shaft, the hot-press forming plates of the two groups of cooling forming assemblies are matched in a crossing manner, and the hot-press forming plates of the two groups of cooling forming assemblies can be matched to press and convey hot-press iron blocks when the hollow shaft rotates;
The upper end of the inner box body is provided with an opening, at least part of the outer edge of the hot press forming plate is exposed out of the opening, an elastic limiting assembly is arranged at the opening of the inner box body and used for limiting the hot press iron block;
The elastic limiting assembly comprises a pressing plate, the pressing plate is connected with the inner box body through a plurality of groups of elastic buffer assemblies, the elastic buffer assemblies comprise end plates, guide rods, limiting plates and first springs, through holes are formed in the pressing plate, the upper ends of the guide rods are fixedly connected with the end plates, the lower ends of the guide rods penetrate through the through holes and are fixedly connected to the inner box body, the limiting plates are located on the lower sides of the pressing plate and are fixedly connected with the guide rods, the first springs are sleeved on the outer sides of the guide rods, and two ends of the first springs are respectively abutted against the end plates and the pressing plate;
the pressing plate comprises an inclined pressing plate and a straight pressing plate fixed at one end of the inclined pressing plate, and the upper end of the inclined pressing plate faces the feeding side of the hot pressing iron block;
the diameter of the through hole is larger than that of the guide rod so as to provide a certain deflection space for the pressing plate;
The inner box body is formed by sequentially splicing a plurality of box sections along the length direction of the inner box body, an outer box body is arranged on the lower side of the inner box body, and a second spring is arranged between the box sections and the outer box body;
The bottom of the box section is provided with an opening, the opening is fixedly provided with an outer frame, a plurality of first grid steel plates are arranged on the outer frame along a linear array, a plurality of second grid steel plates are arranged at the bottom of the outer box body along the linear array correspondingly, the first grid steel plates and the second grid steel plates are arranged in a staggered mode, and the first grid steel plates are in close contact with the adjacent second grid steel plates;
and a cooling liquid is arranged in the outer box body, and the second grid steel plate is simultaneously contacted with the cooling liquid.
2. A method for manufacturing a hot-pressed iron block, characterized in that the manufacturing apparatus according to claim 1 is used, in which a reduced iron raw material is continuously fed into a rotary hearth, high-temperature reduced iron is manufactured by the rotary hearth, and finally the high-temperature reduced iron is cooled by a cooling apparatus and hot-pressed at the same time, whereby the hot-pressed iron block is manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310463716.4A CN116441340B (en) | 2023-04-26 | 2023-04-26 | Hot-pressed iron block manufacturing device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310463716.4A CN116441340B (en) | 2023-04-26 | 2023-04-26 | Hot-pressed iron block manufacturing device and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116441340A CN116441340A (en) | 2023-07-18 |
| CN116441340B true CN116441340B (en) | 2024-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310463716.4A Active CN116441340B (en) | 2023-04-26 | 2023-04-26 | Hot-pressed iron block manufacturing device and manufacturing method thereof |
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| KR101545983B1 (en) * | 2014-02-26 | 2015-08-20 | 현대제철 주식회사 | Apparatus for manufacturing a briquette |
| CN205272554U (en) * | 2016-01-20 | 2016-06-01 | 舟山市定海力劲塑料机械有限公司 | Screw rod of material piece is pressed to area dysmorphism |
| CN210282932U (en) * | 2019-07-18 | 2020-04-10 | 重庆德桥橡胶有限公司 | Cooling device for rubber vulcanization |
| CN113774202A (en) * | 2020-06-09 | 2021-12-10 | 第一产机株式会社 | Cooling device for hot-pressed iron block |
| CN212949099U (en) * | 2020-08-17 | 2021-04-13 | 李华森 | Screw structure of double-screw extruder |
| CN112477037A (en) * | 2020-11-24 | 2021-03-12 | 南京楚卿电子科技有限公司 | Cooling device and method for injection molding machine product |
| CN214349610U (en) * | 2021-01-08 | 2021-10-08 | 青岛邦格尔新材料有限公司 | High-yield double-screw extruder for producing alloy materials |
| CN216325089U (en) * | 2021-12-02 | 2022-04-19 | 唐山市丰润区宏亦再生资源有限公司 | Iron block hot press forming equipment with circulating cooling structure |
| CN217070739U (en) * | 2022-04-07 | 2022-07-29 | 山东金珠材料科技有限公司 | Metal powder material serialization twin-screw extrusion device |
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