WO2007034001A1 - Máquina de inyección, aparato adaptador y procedimiento de inyección en máquina de inyección en molde - Google Patents
Máquina de inyección, aparato adaptador y procedimiento de inyección en máquina de inyección en molde Download PDFInfo
- Publication number
- WO2007034001A1 WO2007034001A1 PCT/ES2005/000503 ES2005000503W WO2007034001A1 WO 2007034001 A1 WO2007034001 A1 WO 2007034001A1 ES 2005000503 W ES2005000503 W ES 2005000503W WO 2007034001 A1 WO2007034001 A1 WO 2007034001A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection
- piston
- mold
- certain
- machine
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/203—Injection pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
- B22D17/04—Plunger machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
Definitions
- the invention relates to a method and a series of apparatus related to the manufacturing by injection of metal parts.
- Metal injection machines are based on an injection mechanism that injects molten metal material into a mold. Some of the most important components of a metal injection machine are the closing group, responsible for opening and closing the mold with due pressure and in due time, the injection mechanism, responsible for introducing molten metal into the mold in due time, and the extraction group, responsible for extracting the parts inside the mold after injection and once the metal has solidified.
- the metal injection machine usually also includes a control unit, which controls the operation of each part of the machine so that all parts act correctly and in a coordinated manner.
- the injection mechanism of a metal injection machine usually comprises a furnace, in which the metal melts at a suitable temperature to be injected, a conduit that communicates the furnace with the mold, and a piston or piston that advances the metal melted from the oven and into the mold, along the duct.
- a furnace in which the metal melts at a suitable temperature to be injected
- a conduit that communicates the furnace with the mold
- a piston or piston that advances the metal melted from the oven and into the mold, along the duct.
- Another type of injection machine is also known in which the oven is not directly communicated with the mold, but the machine comprises a dipper that carries the molten material from the oven to a container, subsequently commissioning a piston to carry the material from the container to the mold through the corresponding duct.
- the operation of the injection mechanism, closure group, and extraction mechanism for the manufacture of parts in an injection machine is usually based on the successive repetition of an injection cycle, where said injection cycle usually comprises a series of fundamental steps:
- the closing group carries out the die closing of the mold
- the injection mechanism begins a first phase of injection in which the piston advances at a relatively slow speed Vl (it can be constant or variable Vl) to deliver the metallic material to a specific point in the user-defined injection stroke, which generally coincides with the entry of the mold feed channels (small channels located in the mold that communicate the mold cavities in which the pieces are formed with the outside of the mold); during this first injection phase, the air inside the duct is displaced by the metallic material until the mold cavities are reached;
- Vl relatively slow speed
- Vl small channels located in the mold that communicate the mold cavities in which the pieces are formed with the outside of the mold
- the injection mechanism sharply increases the piston speed and enters a second injection phase in which the piston advances at a high speed V2 (being able to be V2 constant or variable) to make the filling of the cavities of the piece in a required time and the compaction of the piece to compress the material and make the air bubbles trapped in the piece as small as possible, presenting this second injection phase a duration that depends mainly on the type of mold used;
- the closing group opens the mold
- the extraction mechanism causes the parts inside the cavities to exit;
- a spraying mechanism performs the spraying of the cavities with mold release liquid in order to reduce the temperature of the mold and lubricate the cavities to facilitate the extraction of the parts in the following cycle.
- the present invention aims to provide a series of improvements in the previous injection cycle, in order to reduce the total cycle time and therefore increase the amount of cycles per unit of time that the machine can perform. injection, thus increasing the productivity of the machine.
- the process and the injection machine according to the invention comprise a preliminary injection phase that takes place at a safety rate, generally lower than the speed (Vl) of the first injection phase (although it could also be the same or greater than Vl), and with the mold open. Since the mold is open, for safety reasons and to prevent a certain amount of molten metal material from spilling outwards through the nozzle, the injection process and injection machine according to the invention complement said injection at safety speed with a check of the piston position. Thus, if the piston leaves the displacement range associated with the displacement of material until approximately the entrance of the mold, it is immediately stopped to prevent it from advancing in excess and the aforementioned spill of material occurs.
- the method and the machine according to the invention further comprise a constant check of the injection conditions (closure of the mold, etc.) so that as soon as said conditions are met the procedure and the machine leave the preliminary injection phase and automatically switch to the first injection phase (speed Vl) followed by the second injection phase (speed V2).
- the process and injection machine according to the invention achieve, by performing a preliminary injection phase with the mold still open and not having to wait for the mold to be closed to start the injection, reduce the duration of the injection cycle and therefore increase the number of workable cycles per unit of time.
- the reduction in the cycle time is estimated to be between 1 and 3 seconds depending on the construction concept of the machine (diameter of the duct and piston) and the piston travel during the preliminary injection phase.
- the process and the injection machine have the additional advantage of facilitating the evacuation of air from inside the duct during the injection and reducing the amount of air that appears inside the manufactured parts, thereby decreasing the appearance of pores in the pieces and increasing the resistance of the pieces.
- the piston moves with the mold open, and therefore the air displaced by the moving material can freely flow from the nozzle to the outside of the mold and the machine.
- the safety speed is preferably not accessible by the user.
- Another aspect of the invention is an adapter apparatus that allows adapt a traditional injection machine, of the type known in the state of the art, so that it can have the execution of the injection procedure according to the invention, with the preliminary injection phase at a safe speed and with open mold, complemented with a piston position control.
- the adapter apparatus is especially suitable for injection machines with hydraulic drive injection mechanisms, which are widely used in the state of the art, although its use with electric drive injection machines is also feasible.
- Said adapter apparatus comprises the input means for knowing the affirmative or negative existence of the injection conditions or conditions that determine if the piston has to travel at the speed Vl corresponding to the first injection phase.
- Said apparatus further comprises input means for knowing if the piston is in the safety zone (among which it can include at least one sensor connectable to the injection machine to detect if the piston is in the safety zone), and input means to know the affirmative or negative existence of a certain condition prior to the closure of the mold, which, if affirmative, starts the process according to the invention.
- the apparatus comprises output means for communicating to the injection machine the information necessary to influence the piston speed of the injection mechanism of the injection machine.
- the adapter apparatus can be activated or deactivated (even by an external order from the injection machine), so that if it is deactivated, the output means do not influence the piston speed of the injection mechanism of the injection machine. injection.
- FIG. 1 shows the injection mechanism at different times of the injection procedure according to the invention.
- FIG. 4 shows a state diagram of a procedure of Injection known in the state of the art.
- FIG. 5 shows a generic embodiment of the injection method according to the invention.
- FIG. 7 shows several injection cycles of a particular case of the injection procedure of Figure 5.
- FIGs 1, 2 and 3 show the parts of an injection machine (8) most relevant to the present invention, such as the injection mechanism (11) and the closure group (9).
- the closing group (9) comprises two plates (9a, 9b) or relatively flat pieces to which two parts (10a, 10b) of a mold (10) provided with sub-cavities (23a, 23b) are connected.
- the closing group (9) is closed, that is, when the mobile plate (9a) is closed on the fixed plate (9b), the parts (10a, 10b) of the mold (10) are closed and causes the formation of the cavities (23) proper, for the conformation of pieces, when the sub-cavities (23a, 23b) are joined.
- the injection mechanism (11) comprises a piston (12) that moves vertically to push the molten material (13) into an oven (22) through a conduit (14) comprising an outlet nozzle (15) towards the mold (10).
- the drawing also shows the safety zone (16) of the piston (12), which is defined as the range of positions delimited between a minimum position (18) corresponding to the position of least advance of the piston (12) and a maximum position (17) corresponding to the forward position of the piston (12) that places the material (13) approximately at the inlet of the mold (10).
- FIG 1 An initial situation in which the mold (10) is open, the piston (12) is in its minimum position (18) or higher, is shown in Figure 1, the material (13) is inside the conduit ( 14) and flush with the oven (22), and most of the duct (14) is It is full of air.
- the preliminary injection phase begins, in which the piston (12) moves at a safety speed (Vs) while the mold (10) is still open.
- Figure 2 shows the injection mechanism (11) during the preliminary injection phase, which takes place while the closing group (9) and the mold (10) are closed.
- the injection machine (8) detects that certain injection conditions occur, which can preferably be summarized in that the mold (10) is closed under pressure, the injection machine (8) passes to the first injection phase to speed (Vl), in which material (13) is carried substantially to the inlet (5) of the mold (10), and to the second high-speed injection phase (V2), in which they are filled with material (13) the cavities (23) of the mold (10).
- Vl first injection phase to speed
- V2 second high-speed injection phase
- Figure 4 shows a state diagram of an injection procedure known in the state of the art.
- the procedure starts when certain injection conditions (4) are detected, generally indicating that the closure of the pressure mold has been carried out and that the necessary conditions for the injection can begin of material.
- a first injection phase (19) begins in which the piston travels at a relatively slow speed (Vl) to inject material substantially into the mold (usually to the inlet of the feeding channels of the mold).
- Vl relatively slow speed
- V2 high speed
- the injection mechanism returns to the initial state (26), other mechanisms acting as the closing group to open the mold, and the extraction group to extract the pieces.
- the procedure is cyclic.
- Figure 5 shows a state diagram of a generic embodiment of the injection method according to the invention.
- the invention proposes a series of actions between the initial state (26) of the process and the first injection phase (19) at relatively slow speed (Vl).
- the piston (12) moves to the speed (Vl) corresponding to the first injection phase (19).
- the certain injection conditions (4) are indicative that the closure of the pressure mold has been carried out and that the conditions are met necessary for the injection of material to begin, and preferably they will be defined as the simultaneous fulfillment of at least two of the following conditions: that the closing group (9) is closed under pressure, that is, that the mobile plate (9a ) is in its most advanced position and that is exerting pressure towards the fixed plate (9b), that the mold (10) is positioned against the nozzle (15) or end of the duct, and that some cylinders or other elements in charge of Pushing the nozzle (15) or end of the conduit against the mold (10) are effectively pressing to push the nozzle (15) against the mold (10).
- the certain condition (3) that starts the procedure (1) is in any case prior to the closure of the mold (10).
- the invention contemplates two preferred embodiments: a first mode in which the certain condition (3) is that the closure group (9) and the mold (10) begin to close; a second way in which the certain condition (3) is that the closure group (9) and, consequently, the mold (10) have been opened (whether or not the extraction of parts or other action parallel to the injection).
- Figures 6, 7 and 8 show three sets of speed-time graphs of the closing (6), injection (1) and extraction (7) procedures based on the repetition of cycles, Figure 6 corresponding to the conventional procedure, the Figure 7 with said first embodiment of the method according to the invention, and Figure 8 with said second embodiment of the method according to the invention.
- a preliminary injection phase (21) is added at safety speed (Vs).
- Said preliminary injection phase (21) is carried out before the mold is closed, that is, during the closing phase (27), specifically a time (2) after starting said closing phase (27). Since in this preliminary injection phase (21) the material advances partially (case of the present figure) or totally along the duct, the duration of the first injection phase (19) to bring the material to the entrance of the Feeding channels are reduced (case of the present figure) with respect to the previous figure or even canceled. Thus, it is visible in the present figure how a greater number of injection cycles per unit of time can be performed, increasing the productivity of the machine.
- the second embodiment of the invention is shown in Figure 8, in which the preliminary injection phase (21) at safety speed (Vs) begins before the closing phase (27), that is, shortly after open the mold (10).
- the certain condition (3) that starts the timer (2) after which the preliminary injection phase (21) begins is that the mold is open, that is, that there is The opening phase is finished (29).
- the duration of the first injection phase (19) is reduced to a greater extent, obtaining a shorter cycle time and a higher injection machine performance.
- the invention contemplates the realization of the injection procedure with all kinds of safety speed (Vs), speed (Vl) of the first injection phase (19), speed (V2) of the second injection phase (20).
- the safety speed (Vs) may be less, equal or greater than Vl.
- the velocity Vl is less than V2
- alternatives are contemplated in which the first injection phase (19) and the second injection phase (20) are performed at the same speed , etc., the configuration of speeds and times of the injection phases other than the preliminary phase not being relevant for the present invention injection (21).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2005800515666A CN101277774A (zh) | 2005-09-16 | 2005-09-16 | 注射机、适配器装置以及用于模具注射机的注射工艺 |
EP05793307A EP1946867A1 (en) | 2005-09-16 | 2005-09-16 | Injection machine, adapter and injection method for an injection mould machine |
PCT/ES2005/000503 WO2007034001A1 (es) | 2005-09-16 | 2005-09-16 | Máquina de inyección, aparato adaptador y procedimiento de inyección en máquina de inyección en molde |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ES2005/000503 WO2007034001A1 (es) | 2005-09-16 | 2005-09-16 | Máquina de inyección, aparato adaptador y procedimiento de inyección en máquina de inyección en molde |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007034001A1 true WO2007034001A1 (es) | 2007-03-29 |
Family
ID=36498722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2005/000503 WO2007034001A1 (es) | 2005-09-16 | 2005-09-16 | Máquina de inyección, aparato adaptador y procedimiento de inyección en máquina de inyección en molde |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1946867A1 (es) |
CN (1) | CN101277774A (es) |
WO (1) | WO2007034001A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2631502A1 (es) * | 2016-09-06 | 2017-08-31 | Comercial Nicem-Exinte, S.A - Coniex | Equipo de inyección de metal en molde polimérico, molde polimérico utilizado y procedimiento de funcionamiento del conjunto |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103386474B (zh) * | 2013-07-16 | 2015-07-29 | 上海大学 | 压铸过程中的持压跟进工艺及其应用 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030029596A1 (en) * | 2001-08-09 | 2003-02-13 | Oskar Frech Gmbh & Co. | Method of operating a hot-chamber pressure diecasting machine and a pressure diecasting machine |
-
2005
- 2005-09-16 CN CNA2005800515666A patent/CN101277774A/zh active Pending
- 2005-09-16 EP EP05793307A patent/EP1946867A1/en not_active Withdrawn
- 2005-09-16 WO PCT/ES2005/000503 patent/WO2007034001A1/es active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030029596A1 (en) * | 2001-08-09 | 2003-02-13 | Oskar Frech Gmbh & Co. | Method of operating a hot-chamber pressure diecasting machine and a pressure diecasting machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2631502A1 (es) * | 2016-09-06 | 2017-08-31 | Comercial Nicem-Exinte, S.A - Coniex | Equipo de inyección de metal en molde polimérico, molde polimérico utilizado y procedimiento de funcionamiento del conjunto |
WO2018046787A1 (es) * | 2016-09-06 | 2018-03-15 | Comercial Nicem-Exinte, S.A. - Coniex | Equipo de inyección de metales o aleaciones de bajo punto de fusión en molde polimérico de tipo elastómero, molde polimérico de tipo elastómero utilizado y procedimiento de funcionamiento del conjunto |
CN110049853A (zh) * | 2016-09-06 | 2019-07-23 | 尼瑟姆-埃辛特商业股份有限公司 | 用于将低熔点合金或金属注入到弹性体聚合物模具中的设备、所使用的弹性体聚合物模具、以及用于操作组件的方法 |
EP3511145A4 (en) * | 2016-09-06 | 2020-04-08 | Comercial Nicem-Exinte, S.A. - Coniex | DEVICE FOR INJECTING METALS OR ALLOYS WITH LOW MELTING POINT INTO AN ELASTOMERIC POLYMER MOLD, ELASTOMERIC POLYMERIC MOLD USED AND METHOD FOR OPERATING THE ASSEMBLY |
CN110049853B (zh) * | 2016-09-06 | 2022-04-22 | 尼瑟姆-埃辛特商业股份有限公司 | 注入方法、注入设备和弹性体类型的聚合物模具 |
Also Published As
Publication number | Publication date |
---|---|
EP1946867A1 (en) | 2008-07-23 |
CN101277774A (zh) | 2008-10-01 |
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