US20190111460A1 - Direct mechanically-operated extrusion press - Google Patents
Direct mechanically-operated extrusion press Download PDFInfo
- Publication number
- US20190111460A1 US20190111460A1 US16/158,364 US201816158364A US2019111460A1 US 20190111460 A1 US20190111460 A1 US 20190111460A1 US 201816158364 A US201816158364 A US 201816158364A US 2019111460 A1 US2019111460 A1 US 2019111460A1
- Authority
- US
- United States
- Prior art keywords
- screw
- extrusion press
- punch
- extrusion
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
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
- B21C23/211—Press driving devices
-
- 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
- B21C23/01—Extruding metal; Impact extrusion starting from material of particular form or shape, e.g. mechanically pre-treated
Definitions
- the present invention relates to a direct mechanically-operated extrusion press for metal materials, with a punch driven by a screw-nut screw system.
- Extrusion presses able to produce extruded metal products typically comprise a punch able to press a metal billet in a die.
- Said punch is integral with a cylinder, the translation of which occurs by pressurizing a hydraulic fluid.
- the cylinder is a single-effect cylinder and consists of a piston and a sleeve.
- the introduction of pressurized fluid into the rear part of the sleeve causes the advancement of the piston and therefore of the punch, which presses the billet into the die.
- the fluid is pressurized by hydraulic pumps and once introduced into the chamber of the sleeve, said pressure turns into force.
- a hydraulic system causes a series of problems due to the complexity of the system, including the classical problems of all hydraulic machines, such as the leakage problem affecting the hydraulic fluid, the periodic replacement thereof, the recovery and disposal thereof, as well as the increased maintenance labor required to maintain the efficiency of a complex hydraulic system in which the assembly of valves, solenoid valves, fluid filters, air filters, pipes, proportional boards, etc. requires an increased maintenance expertise.
- the maximum pressure required to generate the extrusion force normally varies from 25 to 30 MPa
- the hydraulic circuit is susceptible of stresses from continuous cycles induced by cyclical increases and decreases of the hydraulic pressure.
- the problem of flammability of the fluid also exists, because the spontaneous combustion is triggered if it comes into contact with the hot metal (which generally is at 500° C.). In such a case, certain users may use delayed flammability fluid.
- US-2015/0040635 describes a hybrid system which combines a hydraulic system like that described above, with an electric system with electric motors which operate pinions engaging racks which help the translation of the cylinder but which are not capable of generating all the force required to perform the plastic deformation of the metal, i.e. the extrusion.
- this solution consists of a dual or hybrid system, it is doubly complex and in any case the problem of the circulation of the fluid, the cooling thereof, the filtering and periodic replacement thereof due to its deterioration remains, with all the associated and costly scheduled and corrective maintenance operations.
- the main force generated for the extrusion is created by pumps which pressurize a hydraulic fluid.
- WO-2016056276 shows an extrusion press electrically driven by drums about which cables are wound.
- a transverse head integral with the extrusion punch is moved by a pulley. Electric motors cause the winding/unwinding of the cables.
- the use of cables and large drums results in a significant volume, in addition to the wear to which said components are subjected.
- the cables are susceptible of twisting and natural extension (elasticity of the metal) thereof, they do not allow a positioning accuracy under load which also may reach 50 MN of force.
- the more the punch moves towards the die the less the force resulting from this system, up to reaching zero. This is a limitation which is difficult to be overcome.
- This application is applicable only to presses having limited extrusion force due to the increased forces involved.
- JP-201604337 also includes the use of drums and cables for pushing the punch. Said cables are fixed at one end to a body with which the cylinder supporting the punch is integral. Therefore, said cables feed the punch towards the die.
- the Japanese patent also suggests the use of cables as pushing means, i.e. elements subjected to wear and which are cumbersome and with a push which is not very controllable.
- the force required for the extrusion per se (the force by which the plastic deformation of the billet occurs, namely the extrusion) is always generated, even in the hybrid systems described, by the pressurization of the fluid and never by the electric motors directly connected to the punch.
- the mechanically/electrically-operated part is designed to serve auxiliary functions only, never the main one, i.e. the force of extrusion.
- said mechanical means prefferably be slightly or not subjected to wear so as to limit the unexpected production stops and the subsequent losses due to production stops.
- the push of the punch is caused by one or more electric motors directly mechanically connected to the punch by a screw-nut screw system, without the aid of cylinders and/or hydraulic pistons which generate by themselves the extrusion force required.
- the screw-nut screw extrusion system allows reduced energy costs.
- FIG. 1 shows a partially cross-sectional side view of an extrusion press according to the present invention
- FIG. 2 shows a sectional view according to line II-II in FIG. 1 ;
- FIG. 3 shows a block of the sectional view in FIG. 2 ;
- FIG. 4 shows a body of the sectional view in FIG. 2 ;
- FIG. 5 shows a cylinder of the sectional view in FIG. 2 .
- An extrusion press 1 able to transform a metal billet profile by plastic deformation (extrusion) comprises a punch 2 able to push the billet through a die 3 .
- the billet is supported and guided by a container 4 which limits the expansion thereof during the push through the die and is placed between the punch and the die and guides the billet towards the die.
- Punch 2 is integral with a screw 5 (see circle A in FIG. 1 in which the threading of screw 5 is depicted on enlarged scale).
- Screw 5 engages a nut screw 6 which substantially is an annular-shaped body with an inner threaded surface.
- FIG. 1 depicts an annular-shaped electric motor 7 alone.
- Said electric motor 7 comprises a rotor 71 integral with the nut screw 6 and a stator 72 integral with a base 8 by a block 9 .
- the nut screw 6 includes a cylindrical outer surface 64 able to slide on a cylindrical inner surface 91 of a cylindrical cavity 93 of block 9 .
- An interstice 94 is provided between said cylindrical outer surface 64 and said cylindrical inner surface 91 , which is able to accommodate lubricating fluid to facilitate the sliding of body 6 in block 9 .
- Body 6 further comprises an annular portion 65 ( FIG. 1 ) which abuts against block 9 , like a portion of rotor 71 , thus axially blocking the body 6 .
- the extrusion press 1 further comprises a shear 10 able to separate the non-extruded end portion of the billet (referred to as a discard) after the extrusion, such as described in International Patent Application WO-2017103828, for example.
- a shear 10 able to separate the non-extruded end portion of the billet (referred to as a discard) after the extrusion, such as described in International Patent Application WO-2017103828, for example.
- a cylindrical bar 11 connects the container 4 of the billet with block 9 .
- Such a connection is made by a screw and a nut screw and is electrically operated.
- the electrically driven screw-nut screw function aims at moving the billet container 4 along axis E.
- the extrusion press 1 preferably but not necessarily comprises a lubrication unit able to insert lubricating fluid between screw 5 and nut screw 6 in order to limit the friction and thus the energy expenditure of the electric motor 7 .
- motor 7 rotates the nut screw 6 , which allows the translation of screw 5 along axis E due to the engagement thereof.
- the nut screw 6 rotates so as to cause the displacement of screw 5 , and therefore of punch 2 , towards the container 4 in which the billet is accommodated (to the right, looking at FIG. 1 ).
- punch 2 pushes the billet through die 3 , thus causing the plastic extruded deformation thereof, i.e. generating a profiled element.
- motor 7 reverses the rotation of the nut screw 6 , causing screw 5 , and therefore punch 2 , to retract, thus returning to a configuration like that depicted in FIG. 1 .
- the push of punch 2 is caused by an electric motor which directly converts the driving torque thereof into axial force by screw-nut screw motion transmission means without the aid of hydraulic means, i.e. the possible pressurization of hydraulic means does not generate any force which contributes to the required extrusion force.
- the surface engaged in said engagement is between 1 m 2 and 1.5 m 2 , even more preferably about 1.38 m 2 .
- the aforesaid sizes cause a specific load ranging between 1 and 1.5 kg per square millimeter, preferably of 1.3 kg per square millimeter.
- the maximum feeding speed of cylinder 5 preferably is between 25 and 35 mm/second, preferably 30 mm/second, with a rotation speed preferably being between 25 and 35 revolutions per minute, preferably 27 revolutions per minute corresponding to 0.45 revolutions per second.
- the return speed of the cylinder obviously is greater (without a load), preferably between 550 and 650 mm/second, preferably 600 mm/second, with a rotation speed preferably between 800 and 1000 revolutions per minute, preferably 900 revolutions per minute corresponding to 15 revolutions per second.
- motor 7 there may be a toothed crown on which two or more planetary motors are engaged, the purpose of which is the rotation of the aforesaid crown directly fixed to the nut screw 6 .
- the screw-nut screw extrusion system allows a reduced volume of the press, increased cleaning, lower maintenance costs and reduced energy costs.
- the nut screw 6 translates along axis E with the punch 2 integral therewith, and the screw 5 rotates, thus feeding and pushing the punch forwards, with which it is integral.
- screw-nut screw pushing system is also applicable with horizontal screws (e.g. four in number), with which respective nut screws are engaged, which move a vertical plate with which the punch is integral, along axis E.
- horizontal screws e.g. four in number
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
- The present invention relates to a direct mechanically-operated extrusion press for metal materials, with a punch driven by a screw-nut screw system.
- Extrusion presses able to produce extruded metal products typically comprise a punch able to press a metal billet in a die.
- Said punch is integral with a cylinder, the translation of which occurs by pressurizing a hydraulic fluid.
- The cylinder is a single-effect cylinder and consists of a piston and a sleeve. The introduction of pressurized fluid into the rear part of the sleeve causes the advancement of the piston and therefore of the punch, which presses the billet into the die.
- The fluid is pressurized by hydraulic pumps and once introduced into the chamber of the sleeve, said pressure turns into force.
- Disadvantageously, a hydraulic system causes a series of problems due to the complexity of the system, including the classical problems of all hydraulic machines, such as the leakage problem affecting the hydraulic fluid, the periodic replacement thereof, the recovery and disposal thereof, as well as the increased maintenance labor required to maintain the efficiency of a complex hydraulic system in which the assembly of valves, solenoid valves, fluid filters, air filters, pipes, proportional boards, etc. requires an increased maintenance expertise. Considering that the maximum pressure required to generate the extrusion force normally varies from 25 to 30 MPa, the hydraulic circuit is susceptible of stresses from continuous cycles induced by cyclical increases and decreases of the hydraulic pressure. Additionally, the problem of flammability of the fluid also exists, because the spontaneous combustion is triggered if it comes into contact with the hot metal (which generally is at 500° C.). In such a case, certain users may use delayed flammability fluid.
- US-2015/0040635 describes a hybrid system which combines a hydraulic system like that described above, with an electric system with electric motors which operate pinions engaging racks which help the translation of the cylinder but which are not capable of generating all the force required to perform the plastic deformation of the metal, i.e. the extrusion. Given that this solution consists of a dual or hybrid system, it is doubly complex and in any case the problem of the circulation of the fluid, the cooling thereof, the filtering and periodic replacement thereof due to its deterioration remains, with all the associated and costly scheduled and corrective maintenance operations. In this solution, the main force generated for the extrusion is created by pumps which pressurize a hydraulic fluid.
- WO-2016056276 shows an extrusion press electrically driven by drums about which cables are wound. A transverse head integral with the extrusion punch is moved by a pulley. Electric motors cause the winding/unwinding of the cables. The use of cables and large drums results in a significant volume, in addition to the wear to which said components are subjected. Moreover, given that the cables are susceptible of twisting and natural extension (elasticity of the metal) thereof, they do not allow a positioning accuracy under load which also may reach 50 MN of force. Moreover, the more the punch moves towards the die, the less the force resulting from this system, up to reaching zero. This is a limitation which is difficult to be overcome. This application is applicable only to presses having limited extrusion force due to the increased forces involved.
- JP-201604337 also includes the use of drums and cables for pushing the punch. Said cables are fixed at one end to a body with which the cylinder supporting the punch is integral. Therefore, said cables feed the punch towards the die. As in the above-mentioned document, the Japanese patent also suggests the use of cables as pushing means, i.e. elements subjected to wear and which are cumbersome and with a push which is not very controllable.
- It is worth noting that the force required for the extrusion per se (the force by which the plastic deformation of the billet occurs, namely the extrusion) is always generated, even in the hybrid systems described, by the pressurization of the fluid and never by the electric motors directly connected to the punch. The mechanically/electrically-operated part is designed to serve auxiliary functions only, never the main one, i.e. the force of extrusion.
- It is the object of the present invention to provide an extrusion press in which the extrusion force is generated by mechanical means only, without the interposition of pressurized hydraulic means.
- It is a further object of the present invention to ensure, by said mechanical means, at least the same push as the known systems, with less maintenance expenses and energy consumption.
- It is a still further object for said mechanical means to be slightly or not subjected to wear so as to limit the unexpected production stops and the subsequent losses due to production stops.
- Advantageously, the push of the punch is caused by one or more electric motors directly mechanically connected to the punch by a screw-nut screw system, without the aid of cylinders and/or hydraulic pistons which generate by themselves the extrusion force required.
- The screw-nut screw extrusion system allows reduced energy costs.
- These and other features of the present invention will become more apparent from the following detailed description of an exemplary practical embodiment thereof, shown by way of non-limitative example in the accompanying drawings, in which:
-
FIG. 1 shows a partially cross-sectional side view of an extrusion press according to the present invention; -
FIG. 2 shows a sectional view according to line II-II inFIG. 1 ; -
FIG. 3 shows a block of the sectional view inFIG. 2 ; -
FIG. 4 shows a body of the sectional view inFIG. 2 ; -
FIG. 5 shows a cylinder of the sectional view inFIG. 2 . - An extrusion press 1 able to transform a metal billet profile by plastic deformation (extrusion) comprises a
punch 2 able to push the billet through adie 3. - The billet is supported and guided by a
container 4 which limits the expansion thereof during the push through the die and is placed between the punch and the die and guides the billet towards the die. -
Punch 2 is integral with a screw 5 (see circle A inFIG. 1 in which the threading ofscrew 5 is depicted on enlarged scale). - Screw 5 engages a
nut screw 6 which substantially is an annular-shaped body with an inner threaded surface. - Said
nut screw 6 is driven to rotation about an axis E ofscrew 5 by one or more electric motors mechanically connected thereto.FIG. 1 depicts an annular-shaped electric motor 7 alone. - Said electric motor 7 comprises a
rotor 71 integral with thenut screw 6 and astator 72 integral with a base 8 by a block 9. - The
nut screw 6 includes a cylindricalouter surface 64 able to slide on a cylindricalinner surface 91 of a cylindrical cavity 93 of block 9. - An
interstice 94 is provided between said cylindricalouter surface 64 and said cylindricalinner surface 91, which is able to accommodate lubricating fluid to facilitate the sliding ofbody 6 in block 9. -
Body 6 further comprises an annular portion 65 (FIG. 1 ) which abuts against block 9, like a portion ofrotor 71, thus axially blocking thebody 6. - The
extrusion press 1 further comprises ashear 10 able to separate the non-extruded end portion of the billet (referred to as a discard) after the extrusion, such as described in International Patent Application WO-2017103828, for example. - A
cylindrical bar 11 connects thecontainer 4 of the billet with block 9. Such a connection is made by a screw and a nut screw and is electrically operated. The electrically driven screw-nut screw function aims at moving thebillet container 4 along axis E. - Moreover, the extrusion press 1 preferably but not necessarily comprises a lubrication unit able to insert lubricating fluid between
screw 5 andnut screw 6 in order to limit the friction and thus the energy expenditure of the electric motor 7. - With regard to the operation, motor 7 rotates the
nut screw 6, which allows the translation ofscrew 5 along axis E due to the engagement thereof. - During the extrusion, the
nut screw 6 rotates so as to cause the displacement ofscrew 5, and therefore ofpunch 2, towards thecontainer 4 in which the billet is accommodated (to the right, looking atFIG. 1 ). - Once in contact with the billet,
punch 2 pushes the billet through die 3, thus causing the plastic extruded deformation thereof, i.e. generating a profiled element. - Once the extrusion has been complete, motor 7 reverses the rotation of the
nut screw 6, causingscrew 5, and therefore punch 2, to retract, thus returning to a configuration like that depicted inFIG. 1 . - Advantageously, the push of
punch 2 is caused by an electric motor which directly converts the driving torque thereof into axial force by screw-nut screw motion transmission means without the aid of hydraulic means, i.e. the possible pressurization of hydraulic means does not generate any force which contributes to the required extrusion force. - Preferably, there are between 40 and 60, even more preferably 50 threads engaged in the engagement of
screw 5 andnut screw 6. - Preferably, the surface engaged in said engagement is between 1 m2 and 1.5 m2, even more preferably about 1.38 m2.
- The aforesaid sizes cause a specific load ranging between 1 and 1.5 kg per square millimeter, preferably of 1.3 kg per square millimeter.
- The maximum feeding speed of
cylinder 5 preferably is between 25 and 35 mm/second, preferably 30 mm/second, with a rotation speed preferably being between 25 and 35 revolutions per minute, preferably 27 revolutions per minute corresponding to 0.45 revolutions per second. - The return speed of the cylinder obviously is greater (without a load), preferably between 550 and 650 mm/second, preferably 600 mm/second, with a rotation speed preferably between 800 and 1000 revolutions per minute, preferably 900 revolutions per minute corresponding to 15 revolutions per second.
- Alternatively, instead of motor 7, there may be a toothed crown on which two or more planetary motors are engaged, the purpose of which is the rotation of the aforesaid crown directly fixed to the
nut screw 6. - Advantageously, the screw-nut screw extrusion system allows a reduced volume of the press, increased cleaning, lower maintenance costs and reduced energy costs.
- The push generated by this mechanical system is sufficient for the extrusion of any metal material without the interposition of a compressed fluid and of the complex hydraulic circuits required therein.
- Alternatively, it may be provided that the
nut screw 6 translates along axis E with thepunch 2 integral therewith, and thescrew 5 rotates, thus feeding and pushing the punch forwards, with which it is integral. - The same above-described screw-nut screw pushing system is also applicable with horizontal screws (e.g. four in number), with which respective nut screws are engaged, which move a vertical plate with which the punch is integral, along axis E. This includes the possibility for the nut screws to rotate-translate on the screws, or alternatively for the screws to rotate in order to feed the nut screws which are integral with the vertical plate.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000115300A IT201700115300A1 (en) | 2017-10-12 | 2017-10-12 | Extrusion press with direct mechanical actuation. |
IT102017000115300 | 2017-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20190111460A1 true US20190111460A1 (en) | 2019-04-18 |
Family
ID=61224300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/158,364 Abandoned US20190111460A1 (en) | 2017-10-12 | 2018-10-12 | Direct mechanically-operated extrusion press |
Country Status (4)
Country | Link |
---|---|
US (1) | US20190111460A1 (en) |
EP (1) | EP3470146B1 (en) |
ES (1) | ES2832876T3 (en) |
IT (1) | IT201700115300A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102023100729A1 (en) | 2022-11-14 | 2024-05-16 | Sms Group Gmbh | Extrusion press |
DE102023105916A1 (en) | 2022-11-14 | 2024-05-16 | Sms Group Gmbh | Extrusion press |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5836190A (en) * | 1996-02-05 | 1998-11-17 | Alusuisse Technology & Management Ltd. | Process for extruding a section or the like from an ingot and a device that purpose |
US20060175487A1 (en) * | 2005-02-04 | 2006-08-10 | Trageser Andrew B | Extruded monolithic aluminum trailer landing gear foot and method of making same |
US20100024509A1 (en) * | 2006-10-16 | 2010-02-04 | Ube Machinery Corporation Ltd., a corporation of Japan | Stem slide device |
US20100263428A1 (en) * | 2009-04-15 | 2010-10-21 | Ube Machinery Corporation, Ltd. | Extrusion press |
US20120244239A1 (en) * | 2009-12-14 | 2012-09-27 | Ube Machinery Corporation, Ltd. | Extrusion press |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6460116B2 (en) * | 2014-10-06 | 2019-01-30 | 宇部興産機械株式会社 | Extrusion press |
JP2016163901A (en) * | 2015-03-06 | 2016-09-08 | 宇部興産機械株式会社 | Hybrid extrusion press |
US10518309B2 (en) | 2015-03-09 | 2019-12-31 | Ube Machinery Corporation, Ltd. | Die-slide device of extrusion press |
-
2017
- 2017-10-12 IT IT102017000115300A patent/IT201700115300A1/en unknown
-
2018
- 2018-10-10 EP EP18199519.2A patent/EP3470146B1/en active Active
- 2018-10-10 ES ES18199519T patent/ES2832876T3/en active Active
- 2018-10-12 US US16/158,364 patent/US20190111460A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5836190A (en) * | 1996-02-05 | 1998-11-17 | Alusuisse Technology & Management Ltd. | Process for extruding a section or the like from an ingot and a device that purpose |
US20060175487A1 (en) * | 2005-02-04 | 2006-08-10 | Trageser Andrew B | Extruded monolithic aluminum trailer landing gear foot and method of making same |
US20100024509A1 (en) * | 2006-10-16 | 2010-02-04 | Ube Machinery Corporation Ltd., a corporation of Japan | Stem slide device |
US20100263428A1 (en) * | 2009-04-15 | 2010-10-21 | Ube Machinery Corporation, Ltd. | Extrusion press |
US20120244239A1 (en) * | 2009-12-14 | 2012-09-27 | Ube Machinery Corporation, Ltd. | Extrusion press |
Also Published As
Publication number | Publication date |
---|---|
IT201700115300A1 (en) | 2019-04-12 |
EP3470146A1 (en) | 2019-04-17 |
ES2832876T3 (en) | 2021-06-11 |
EP3470146B1 (en) | 2020-08-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10518309B2 (en) | Die-slide device of extrusion press | |
EP3470146B1 (en) | Direct mechanically-operated extrusion press | |
JP6460116B2 (en) | Extrusion press | |
RU2650369C2 (en) | Forging machine | |
US20120244239A1 (en) | Extrusion press | |
CN103727094B (en) | A kind of electro-hydraulic servo numerical control push rod device | |
EP3502470B1 (en) | Electric driven gas booster | |
CN112999711A (en) | Filter press and refitting external member thereof | |
CN104810989A (en) | Stator iron core lamination tool | |
EP3750643A1 (en) | Stretching machine for extruded profiles | |
US3862560A (en) | Feed apparatus of tube cold rolling mill | |
KR20160142533A (en) | Waterjet Pump | |
CN108435814B (en) | Extruder and method for controlling extruder | |
US3611502A (en) | High pressure rapid acting closure apparatus for injection molding and the like | |
US11154920B2 (en) | Rolling mill for rolling concave, rod-shaped bodies | |
JP2017518189A (en) | Extrusion molding machine with hydraulic drive | |
US10507504B2 (en) | Hybrid extrusion press | |
CN110280615B (en) | Device and method for rapidly replacing and locking extrusion shaft | |
CN210411956U (en) | Extrusion shaft quick replacement and locking device | |
CN102172721B (en) | Riveting machine for radiator | |
CN104190125A (en) | Screw-type locking filter press for high-pressure squeezing hydraulic pressing machinery | |
GB2501813A (en) | A cartridge assembly for generating pressure with internal intensification | |
CN210003599U (en) | Rotary oil cylinder for winding drum of plunger type coiler | |
US3446053A (en) | Hydraulically operated machine and control system therefor | |
KR20170043137A (en) | Mechenical Multistep Cylinder |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TURLA, DAVIDE, ITALY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TURLA, DAVIDE;TOMELLERI, RAFFAELE;ALBERTI, ANGELO;SIGNING DATES FROM 20181106 TO 20181109;REEL/FRAME:047526/0360 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |