• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Injection piston. It comprises a hollow part constitutive of the piston body (2), and an internal support part (5), which is fixed by a thread (6), of a square pitch and which internally has a central channel (50), which houses a cooling liquid injection tube, (f) terminating in an exit orifice (51) for said fluid in the center of the base (52) of the tip (53) of said support (5), which faces the bottom base (20) of the plunger body (2), where the coolant occupies the intermediate space (7) between both parts (2, 5), said base (52) of the tip (53) of the support having a configuration concave around the exit orifice (51) having the end portion (531) of said tip (53) a conicity creating the intermediate space (7) for the cooling liquid while said tip (53) of the support (5) presents means so that the refrigerant (f) can circulate from said outlet (51) through the base (52) towards the sides of the tip (53) and return to the central channel (50). The tip (53) of the support (5) is smaller than the inner space of the plunger (2) so that, at no point does it contact the inner side wall (21) or the bottom (20) of the plunger (2) . At the rear of the tip (53) there is one or more ducts (54) communicating the outside of the tip of the central channel (50). The part of the inner support of the piston (5) is made of carbon steel that can be bonded. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2710081A1
    申请号:ES201731229
    申请日:2017-10-18
    公开日:2019-04-22
    发明作者:Guasch Jordi Alguero
    申请人:ALROTEC TECNOLOGY S L U；
    IPC主号:
    专利说明:

    [0001]
    [0002] INJECTION PISTON
    [0003]
    [0004] OBJECT OF THE INVENTION
    [0005]
    [0006] The invention, as expressed in the statement of the present specification, refers to an injection piston that provides, to the function to which it is intended, advantages and novelty characteristics, which are described in detail below and which represent an improvement of the current state of the art.
    [0007]
    [0008] The object of the present invention falls, in particular, on a cooled injection piston, of the type applicable in process machines for injection of materials, in particular metals in a liquid state at elevated temperatures, for example aluminum, to obtain injected castings, which presents a series of improvements aimed at improving its function, in particular improvements related to the improvement of piston cooling, as well as the ease of assembly of the parts that compose it.
    [0009]
    [0010] FIELD OF APPLICATION OF THE INVENTION
    [0011]
    [0012] The field of application of the present invention is part of the sector of the manufacture of machinery, accessories and components for industrial processes, focusing particularly on the scope of the pistons for processes of injection of hot materials.
    [0013]
    [0014] BACKGROUND OF THE INVENTION
    [0015] As is known, many industrial applications are based on the use of injected parts, for which the material is subjected to an injection process where, converted into a fluid, it is passed through a machine that comprises, at least, one container with a piston that pushes it to enter inside the mold cavity, obtaining the piece according to the shape of the cavity.
    [0016]
    [0017] The problem is that, especially when it comes to metals, to convert the material into fluid suitable for the injection process, this is subjected to high temperatures and, consequently, the parts that make up the piston suffer from what is applied between the same a refrigerating liquid that regulates its temperature.
    [0018]
    [0019] Well, one of the essential objectives of the present invention is the development of an improved design of some of the parts that make up the injection piston to improve said cooling thereof, more specifically, to improve the circulation of said refrigeration liquid between the pieces that form it allowing, in addition to going through its interior, can rotate around the inner end of it recirculating back to its inner part, to be this area of the end of the piston which suffers most for being the one in Permanent direct contact with the metal at high temperatures.
    [0020]
    [0021] In parallel, another of the objects of the invention is to design the said parts that constitute the piston to improve assembly operations thereof, facilitating the threading between them, comprising at least one plunger body that threads on an internal support by which the refrigerant fluid is injected into the piston.
    [0022]
    [0023] On the other hand, and as a reference to the current state of the art, it is possible to It should be pointed out that, at least on the part of the applicant, the existence of any other injection piston with technical and structural characteristics equal or similar to those specifically stated here is not known.
    [0024]
    [0025] EXPLANATION OF THE INVENTION
    [0026]
    [0027] The injection piston that the invention proposes is thus configured as a novelty within its field of application, the characterizing details that distinguish it being conveniently included in the final claims accompanying the present description.
    [0028]
    [0029] What the invention proposes, as indicated above, is a cooled injection piston, applicable in machines for the process of injection of materials, in particular metals subjected to high temperatures that keeps them in a liquid state, to obtain injected parts to be pressed by said piston so that it passes through a container, which presents a series of improvements in the parts that form it that determine an improvement of the circulation of the refrigeration fluid that it has internally between said pieces, and that facilitate the assembly and disassembly of them.
    [0030]
    [0031] To this end, said parts comprising said piston comprising at least one hollow steel plunger body, located in the distal area of the piston, whereby the material to be extruded is pushed, and that it is or is not externally provided with a ring of closure and of a spring bushing of high strength copper alloy for its adjustment to the inner wall of the shirt where the piston works, and an internal support piece to said plunger, which threads inside it to be fixed to it and , to its Once, it has internally a housing and a thread for the injection tube of the cooling liquid that penetrates between both pieces, that is, between the plunger and the support, through said tube through a hole in which it opens for the purpose in the base of the tip of the inner support.
    [0032]
    [0033] Well, from this configuration already known, the piston of the invention is distinguished, essentially, by presenting, said base of the tip of said inner support part a concave configuration around the outlet of the cooling fluid which, together to a conical configuration of the end of said tip, the cooling action of the liquid on the body of the plunger considerably improves.
    [0034]
    [0035] More specifically, this concave configuration of the base of the tip of the support and cone at its end supposes an improvement for the cooling of the piston because it creates a cavity which, in addition to facilitating the exit of the refrigerant fluid, also allows the existence of a greater quantity of said refrigerant fluid at said point of the piston, between the tip of the support and the inner wall of the plunger body, which is the area that, on the outside of said plunger is in contact with the material to be extruded at high temperature.
    [0036]
    [0037] Furthermore, according to another important characteristic of the structure of the parts that form the piston, the configuration of the tip of the internal support of the piston, with the aforementioned conical shape of the end and the concave base, is designed in such a way that, being perfectly coupled between itself by threading the parts of the support and the plunger, the support is somewhat shorter and the tip of it does not remain in contact at any point with the base of the inner wall of the plunger body, unlike what usually occurs in the existing pistons so far in the market, which are generally in contact except for some slots for the cooling liquid. On the other hand, in the piston of the invention, thanks to said configuration, the refrigerant liquid, in addition to occupying a larger cavity, as indicated above, can circulate around it, whereby said liquid moves towards the penometer where there is a free space for the return and pass through the sides of the tip of the support, between this and the sides of the piston, re-entering the channel inside the support by lateral conduits provided for the purpose, so that all The area of the tip of the support is flooded with cooling liquid that recirculates around it, acting on the entire inner surface of the plunger body to provide an improved cooling effect.
    [0038]
    [0039] Thus, said configuration of the tip of the support is what allows a better cooling of the body of the plunger of the piston, avoiding the deformation of the body of the plunger, which improves the durability of the piston.
    [0040]
    [0041] Additionally, the thread that allows the connection of the inner support part with the plunger body of the piston, is advantageously of square pitch. This is advantageous because it allows a certain play of movement between both parts while they are being screwed, which facilitates the threading and unscrewing thereof and the game disappears when the end of the thread travel is reached.
    [0042]
    [0043] Generally, the thread that joins these two parts, in the known injection pistons, is triangular in pitch that does not allow any play and causes the parts to jam in the threading.
    [0044]
    [0045] Finally, it should be noted that the material in which the piece is manufactured that constitutes the internal support of the piston, although it can be hot-working steel, preferably, it is carbon steel that can be bonded, which is cheaper.
    [0046]
    [0047] Preferably, the front part of the plunger has two thicknesses. The perimeter of the front part of the plunger, which is the one closest to the internal part of the extrusion cylinder, has a greater thickness to withstand the stresses that are generated on said part. The central part of the front part of the plunger has a smaller thickness that allows a better cooling of the plunger.
    [0048]
    [0049] The described injection piston consists, therefore, in an innovative structure of characteristics unknown until now for the purpose for which it is intended, reasons which, together with its practical use, provide it with sufficient grounds to obtain the privilege of exclusivity that is requested.
    [0050]
    [0051] DESCRIPTION OF THE DRAWINGS
    [0052]
    [0053] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, the accompanying descriptive memory is included, as an integral part thereof, a set of plans in which illustrative and not limiting the following has been represented:
    [0054]
    [0055] Figure 1 shows a partially sectioned and assembled view of an embodiment of the injection piston, object of the invention, represented only with the main parts comprising those that affect the improvements it presents, that is, the body outside of the plunger and the inner support of said body without including the inner nozzle of injection of the refrigerant, being appreciated the configuration and disposition of said parts;
    [0056]
    [0057] Figure 2 shows a view of the piston of the invention, similar to that shown in Figure 1, but in this case represented with the parts that make up the body of the plunger and the support removed, appreciating the configuration of each of said pieces;
    [0058]
    [0059] Figure 3.- Represents an enlarged view of the detail A shown in Figure 1 and showing the configuration of the distal tip of the support piece and the open cavity that is created inside the body of the plunger where it is incorporated for to allow the passage of the refrigerant fluid between both parts to rotate in said tip;
    [0060]
    [0061] Figure 4 shows a view similar to that shown in Figure 3, of the enlargement of the detail A indicated in Figure 1, in this case including the cooling fluid between the tip of the support piece and the interior of the body of the plunger, whose direction of flow has been indicated by arrows;
    [0062]
    [0063] Figure 5.- Represents an enlarged view of the detail B indicated in figure 1 and which allows to better observe the configuration of square pitch of the thread that joins the support piece with the plunger body in the piston of the invention;
    [0064]
    [0065] Figure 6 shows a new view in section similar to that shown in Figures 3 and 4, in this case showing the forces generated by the closing ring surrounding the end of the plunger; Y
    [0066]
    [0067] Figure 7 shows a side view partially sectioned and assembled from another embodiment of the injection piston according to the invention, in this case an example without a ring or bushing in the plunger.
    [0068]
    [0069] PREFERRED EMBODIMENT OF THE INVENTION
    [0070]
    [0071] In view of the mentioned figures, and according to the numeration adopted therein, a non-limiting example of the injection piston of the invention can be observed, which comprises the parts and elements that are indicated and described in detail below.
    [0072]
    [0073] Thus, as seen in said figures, the piston (1) of the invention comprises, in its distal part, a hollow part of U-section constitutive of the plunger body (2), optionally with a closing ring (3). ) externally surrounding its distal blind end and with a spring bushing (4) located externally surrounding its opposite end, and, in any case, an inner support part (5), which is fixed occupying the interior of the plunger (2) by means of a thread (6), and which, in turn, internally presents a central channel (50), which passes through the longitudinal axis of said support (5), suitable for housing a cooling liquid injection tube (not shown) , ending in an exit hole (51) in the center of the base (52) of the tip (53) of said support (5), which faces the bottom base (20) of the plunger body (2) ; outlet hole (51) for the cooling fluid (f) that will occupy the intermediate space (7) between both parts (2, 5), with the particularity that said base (52) of the tip (53) of the support (5) has a concave configuration around the outlet hole (51) and the final portion (531) of said tip (53) has a conical configuration, determining a remarkable width of the intermediate space (7) more clearly visible in Figure 3 , for the refrigerant fluid (f), which is represented in figure 4.
    [0074] In addition, the entire tip (53) of the support (5) has a smaller dimension and configuration to the interior space of the plunger (2) in such a way that, at no point thereof, it makes contact with the lateral interior wall (21) or with the bottom (20) of the plunger (2), in any case, in the rear part of said tip (53) of the support (5), one or more ducts (54) communicating the outside of the tip (53) with the central channel (50), in such a way that they determine means so that the refrigerant fluid (f), as seen in figure 4, can circulate from the exit orifice (51) through the base (52) toward the sides of the tip (53) and return to the central channel (50) through said ducts (54).
    [0075]
    [0076] Additionally, the thread (6) that allows the connection and fixation between the inner support (5) with the plunger body (2) of the piston, is of square pitch, as can be seen with greater clarity in figure 5, allowing a certain play of movement between both pieces while performing the threading or unscrewing of the same, and that disappears completely when it reaches the end of the path of the thread (6).
    [0077]
    [0078] Figures 1 to 6 show an example of the plunger with the aforementioned closing ring (3) externally surrounding the distal blind end of the plunger (2) and with a spring bushing (4) located externally surrounding its opposite end, showing figure 6 , by means of arrows, the force exerted by said ring from the external radius (R) and on the internal radius (r) of the edge of said end of the plunger (2).
    [0079]
    [0080] In figure 6 it is observed that, preferably, the front part of the plunger (2) has two thicknesses. The perimeter of the front part of the plunger (2), which is the one closest to the internal part of the extrusion cylinder, has a greater thickness to withstand the stresses that are generated on that part. The central part of the front part of the plunger (2) has a smaller thickness that allows a better cooling of the plunger (2).
    [0081]
    [0082] On the other hand, figure 7 shows how the piston (1) described is also realizable in a version without closing ring or spring bushing surrounding the plunger (2)
    [0083]
    [0084] Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any expert in the field understands its scope and the advantages derived therefrom, stating that, within its essentiality, it may be carried out in other modes of realization that differ in detail from that indicated by way of example, and which will also achieve the protection that is sought as long as it is not altered, changes or modifies its fundamental principle .
    权利要求:
    Claims (6)
    [1]
    1. - Injection piston, comprising, a hollow part U-shaped constituent of the plunger body (2), and an inner support part (5), which is fixed occupying the inside of the above mentioned plunger (2) by a thread (6), and which, in turn, internally presents a central channel (50), which passes through the longitudinal axis of said support (5) and is suitable for the housing of a cooling liquid injection tube, ending in a outlet hole (51) for said cooling fluid (f) in the center of the base (52) of the tip (53) of said support (5), which faces the bottom base (20) of the body of the plunger (2), where the cooling fluid (f) occupies the intermediate space (7) between both parts (2, 5), is characterized in that said base (52) of the tip (53) of the support (5) has a configuration concave around the outlet orifice (51) and the final portion (531) of said tip (53) presents a conical configuration, determining a spacing Intermediate (7) for the refrigerant fluid (f) of remarkable amplitude; and in that said tip (53) of the support (5) has means so that the cooling fluid (f) can circulate from the outlet hole (51) through the base (52) towards the sides of the tip (53) and return to the central channel (50).
    [2]
    2. - Injection piston, according to claim 1, characterized in that the tip (53) of the support (5) has a smaller dimension and configuration to the internal space of the plunger (2) in such a way that, in no point of the same, makes contact with the inner side wall (21) or with the bottom (20) of the plunger (2).
    [3]
    3. - Injection piston, according to claim 1 or 2, characterized in that in the rear part of the tip (53) of the support (5) there are one or more ducts (54) that communicate the outside of the tip (53) with the central channel (50), constituting the means for the cooling fluid (f) to circulate from the outlet hole (51) by the base (52) towards the sides of the tip (53) and return to the central channel (50) .
    [4]
    4. Injection piston according to any of claims 1 to 3, characterized in that the thread (6) that allows the connection and fixation between the inner support (5) with the piston body (2) of the piston (1), It is a square pitch thread, which favors that it is not blocked, due to thermal expansion.
    [5]
    5. - Injection piston, according to any of the preceding claims, characterized in that the piece the inner support of the piston (5) is made of carbon steel bonificable.
    [6]
    6. - Injection piston according to any of the preceding claims, characterized in that the perimeter of the front part of the plunger (2) has a thickness greater than the thickness of the central part of the front part of the plunger (2).
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112013003256B1|2021-02-23|piston for an internal combustion engine
    JP2017224626A5|2018-06-07|
    EP2713118A2|2014-04-02|Vortex tube
    ES2563405T3|2016-03-15|Stacking plate thermal transmitter, especially intake air cooler
    ES2710081A1|2019-04-22|INJECTION PISTON |
    KR101392281B1|2014-05-12|Cold runner injection molding cooling device
    ES2872405T3|2021-11-02|Injection molding tool
    BRPI1007343B1|2018-02-14|PRESSURE COOLED PISTON AND SUPPORT
    US20160082633A1|2016-03-24|Heater and Thermocouple Assembly
    ES2264033T3|2006-12-16|RIFLE BULLET.
    JP6347670B2|2018-06-27|Overmold container manufacturing equipment
    BRPI0902448B1|2017-05-16|injection chamber for a metal injection machine
    JP3198763U|2015-07-23|sprue bush
    JP6275479B2|2018-02-07|Thermostat housing
    JP6604124B2|2019-11-13|Injection molding equipment
    KR20160084891A|2016-07-15|Ice maker
    ES2700723T3|2019-02-19|Temperature regulation sleeve, preferably for plastic injection molding tools
    CN106363137A|2017-02-01|Casting die for manufacturing shell of compressor of refrigerator
    KR20110133181A|2011-12-12|Sprue bush for injection mold
    ES2720610T3|2019-07-23|Hot channel injection molding tool with needle valve nozzle
    US20210031419A1|2021-02-04|Mold assembly for injection molding of a plastic pipe fitting and injection molded pipe fitting made of plastics
    US20220023937A1|2022-01-27|Injection chamber or container
    JP5159067B2|2013-03-06|Injection mold
    TWM464311U|2013-11-01|Cooling water channel for nozzle
    CN206890963U|2018-01-16|Cold storage plant
    同族专利:
    公开号 | 公开日
    WO2019077184A1|2019-04-25|
    ES2710081B2|2020-05-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS57142755A|1981-02-27|1982-09-03|Hanano Shoji Kk|Cooler for plunger tip for die casting|
    DE3934778A1|1988-12-28|1990-07-05|Allper Ag|Piston for casting cylinder of die casting press - has cooling channels for thin-walled cap pref. heat shrunk to threaded body|
    DE102015216946A1|2015-09-04|2017-03-09|Bayerische Motoren Werke Aktiengesellschaft|casting plunger|
    法律状态:
    2019-04-22| BA2A| Patent application published|Ref document number: 2710081 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190422 |
    2020-05-27| FG2A| Definitive protection|Ref document number: 2710081 Country of ref document: ES Kind code of ref document: B2 Effective date: 20200527 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201731229A|ES2710081B2|2017-10-18|2017-10-18|INJECTION PISTON|ES201731229A| ES2710081B2|2017-10-18|2017-10-18|INJECTION PISTON|
    PCT/ES2018/070671| WO2019077184A1|2017-10-18|2018-10-16|Injection piston|
    [返回顶部]