CN118385521A - Semisolid die-casting forming device and method for flaky aluminum alloy profile - Google Patents

Abstract

The invention discloses a semi-solid die-casting forming device and a semi-solid die-casting forming method for a flaky aluminum alloy section, wherein the forming device comprises an upper die and a lower die; a feeding channel, a runner and a cavity are formed between the upper die and the lower die; the cavity is provided with a feed inlet; two ends of the runner respectively form a second pair of interfaces and a third pair of interfaces; the outer contour of the first pair of interfaces forms a first projection on a YZ plane, the outer contour of the second pair of interfaces forms a second projection on the YZ plane, and the outer contour of the third pair of interfaces forms a third projection on the YZ plane; the first projection falls into the projection of the outer contour of the connecting port on the YZ plane, and the second projection falls into the first projection; the height of the third projection is smaller than that of the second projection, and the width of the third projection is larger than that of the second projection; the inner wall of the runner forms a curved surface which is smoothly transited from the second feed inlet to the third feed inlet. The invention ensures that the aluminum alloy slurry can be uniformly distributed in the cavity, and the formed aluminum alloy section has higher compactness and more uniform compactness.

Description

Semisolid die-casting forming device and method for flaky aluminum alloy profile

Technical Field

The invention relates to the technical field of metal processing, in particular to a semi-solid die-casting forming device and method for a sheet aluminum alloy section.

Background

In the 3C industry, in order to enhance the user experience, the screen ratio of electronic devices such as mobile phones and tablet computers is higher and higher, so that appearance parts such as a back plate of the electronic devices are required to play a role in decoration, and meanwhile, the purpose of protecting a display screen is achieved, therefore, aluminum alloy sheet profiles with better strength and light weight are gradually applied to the electronic devices, most of aluminum alloy sheet profiles applied to the electronic devices are processed into electronic device parts meeting the requirements in a machining mode, the machining efficiency is lower, and the electronic device parts are difficult to adapt to larger market demands of the electronic devices.

In order to solve the problem of low machining efficiency, some aluminum alloy sections for electronic equipment, which are formed by adopting a die casting process, appear on the market, wherein semi-solid aluminum alloy slurry is injected into a cavity of a die casting mold through an injection mechanism, so that the aluminum alloy slurry is cooled and solidified in the die casting mold to form a product, and the aluminum alloy section manufactured through the die casting mold has high precision, better compactness and fewer post-procedures; at present, the cross section of a charging barrel butted with an injection mechanism on a die casting mold is circular, the inner diameter of the charging barrel is generally in the range of 50-80 mm, when a section bar with the cross section of which the height is equal to the width of the circular, square or other cross sections is processed, the center line of a cavity is set to be coincident or approximately coincident with the center line of the charging barrel, a runner between the charging barrel and the cavity forms a cone-shaped structure, the flow of aluminum alloy slurry at the front end of the cavity is reduced, and the flow rate and the pressure of the aluminum alloy slurry when entering the cavity are increased through the runner of a necking structure, so that the aluminum alloy slurry can be uniformly filled in the cavity.

However, when processing a workpiece with smaller ratio of height to width dimension of some cross sections, for example, a sheet-shaped aluminum alloy section, the width dimension of the workpiece is relatively larger, the prior art is to divide the runner into a plurality of sub-runners, the plurality of sub-runners are distributed at intervals in the width direction of the cavity, the aluminum alloy slurry in the runner is split to different positions in the width direction of the cavity by the plurality of sub-runners, the runner is constructed into the structure, although the purpose of leading the aluminum alloy slurry into different positions in the width direction of the cavity can be achieved, the aluminum alloy slurry can be filled into the cavity rapidly, but at different positions in the width direction of the cavity, the filling speed of the aluminum alloy slurry in the area opposite to the sub-runners is relatively higher, the filling speed of the aluminum alloy slurry in the area corresponding to the two sub-runners is relatively lower (the aluminum alloy slurry is diffused to the area of the non-runners from the inside of the cavity to the two sides after entering the inside of the cavity by the sub-runners), the filling speed of the aluminum alloy slurry in the different areas is very easy to cause non-uniformity of the workpiece after forming, even the aluminum alloy slurry is diffused in the width direction, and the aluminum alloy slurry is discharged out of the air in the width direction of the cavity in time when the aluminum alloy slurry is diffused in the width direction, and the sheet-shaped aluminum alloy is discharged out of the cavity is extremely stopped.

Disclosure of Invention

The invention mainly aims to provide a semi-solid state die-casting forming device and method for a sheet aluminum alloy profile, which are used for solving the problem that semi-solid aluminum alloy slurry is difficult to uniformly distribute in a die cavity in the die-casting process of the sheet aluminum alloy profile so as to improve the compactness of the sheet aluminum alloy profile.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the semi-solid die-casting forming device of the flaky aluminum alloy section comprises an upper die and a lower die;

a feeding channel, a runner and a cavity are formed between the upper die and the lower die, which are sequentially communicated from outside to inside along the X direction, and the outer side end of the feeding channel is connected with an injection mechanism so that semi-solid aluminum alloy slurry ejected by the injection mechanism can enter the cavity through the feeding channel and the runner;

one side of the cavity facing the runner forms a feeding hole extending along the Y direction, and two sides of the feeding hole extend to two sides of the cavity respectively; the outer side end of the feeding channel forms a connecting port which is connected with the injection mechanism and has a circular section, the other end forms a first pair of interfaces, the outer side end of the flow channel forms a second pair of interfaces which are in butt joint with the first pair of interfaces, and the inner side end forms a third pair of interfaces which are communicated with the feeding port;

The outer contour of the first pair of interfaces forms a first projection on a YZ plane, the outer contour of the second pair of interfaces forms a second projection on the YZ plane, and the outer contour of the third pair of interfaces forms a third projection on the YZ plane; the first projection falls into the projection of the outer contour of the connecting port on the YZ plane, and the second projection falls into the first projection; in the Z direction, the height of the third projection is smaller than the height of the second projection, and the width of the third projection in the Y direction is larger than the width of the second projection; the area of the area surrounded by the third projection is smaller than that of the area surrounded by the second projection;

Two sides of the third pair of interfaces in the Y direction respectively protrude out of two sides of the feed inlet, and at least one part of the third pair of interfaces in the Z direction coincides with the feed inlet so that the third pair of interfaces and the feed inlet communicate the runner with the cavity; forming a curved surface smoothly transiting from the second feed port to the third feed port on the inner wall of the runner;

the X direction, the Y direction and the Z direction are respectively the length direction, the width direction and the height direction of the die-casting mould formed after the upper die and the lower die are clamped.

Preferably, the lower die comprises a lower die core, a lower die insert fixedly connected with the lower die core and a lower shell of a charging barrel fixedly connected with the lower die core, and the upper die comprises an upper die core, an upper die insert fixedly connected with the upper die core and an upper shell of the charging barrel fixedly connected with the upper die core; the cavity is positioned between the lower die core and the upper die core, the runner is positioned between the lower die insert and the upper die insert, and the feeding channel is positioned between the lower shell of the charging barrel and the upper shell of the charging barrel.

Preferably, the upper surface of the lower die insert is recessed downward to form a lower groove, the upper surface of the upper die insert is recessed upward to form an upper groove, the lower groove and the lower groove together form a runner, and the curved surface comprises a lower curved surface formed by the inner wall surface of the lower groove and an upper curved surface formed by the inner wall surface of the upper groove.

Preferably, a lower inclined plane is arranged on the inner wall surface of the lower groove, and the lower inclined plane extends upwards from the inner edge of the lower curved surface to the third pair of interfaces in an inclined manner, so that the top edge of the lower inclined plane forms the lower edge of the third pair of interfaces; an upper inclined plane is arranged on the inner wall surface of the upper groove, and the upper inclined plane extends downwards from the inner edge of the upper curved surface to the third pair of interfaces in an inclined manner, so that the bottom edge of the upper inclined plane forms the upper edge of the third pair of interfaces; the lower curved surface, the lower inclined surface, the upper curved surface and the upper inclined surface form a curved surface together.

Preferably, the distance of the lower inclined surface extending along the X direction is D1, the height of the lower inclined surface extending along the Z direction is M1, the distance of the lower curved surface extending along the X direction is D2, and the height of the lower curved surface extending along the Z direction is M2, wherein M1/D1 is larger than M2/D2; the distance that the upper inclined plane extends along X direction is D3, and the height that the upper inclined plane extends along Z direction is M3, and the distance that the upper curved surface extends along X direction is D4, and the height that the upper curved surface extends along Z direction is D4, wherein M3/D3 is greater than M4/D4.

Preferably, the widths of the projections of the upper inclined surface and the lower inclined surface on the XY plane gradually decrease from the middle to the two sides.

Preferably, the upper edge of the third pair of ports is higher than the upper edge of the feed port, and the lower edge of the third pair of ports is located between the upper edge of the feed port and the lower edge of the feed port so that at least a portion of the third pair of ports coincides with the feed port in the Z direction.

Preferably, a semicircular concave position is arranged on the lower shell of the charging barrel and the upper shell of the charging barrel, the two semicircular concave positions jointly form a charging channel and enable the charging channel to be in a cylindrical structure, and the bottom surface of the semicircular concave position of the lower shell of the charging barrel is sunken downwards to form a sinking groove for precipitating impurities in the semisolid aluminum alloy slurry.

Preferably, the inner side end of the lower shell of the charging barrel is provided with a lower retaining wall extending inwards along the radial direction of the charging channel and positioned at the inner side of the sinking groove, the inner side end of the upper shell of the charging barrel is provided with an upper retaining wall extending inwards along the radial direction of the charging channel, and the inner edge of the lower retaining wall and the inner edge of the upper retaining wall jointly enclose a first pair of interfaces.

Preferably, the upper surface of lower mould benevolence is provided with the concave position of undercut, and the lower surface of upper mould benevolence is provided with the concave position of upwards sunken, and the die cavity comprises concave position and last concave position jointly, is provided with a plurality of first exhaust grooves and a plurality of second exhaust grooves at the upper surface of lower mould benevolence, and first exhaust groove deviates from the edge that the feed inlet extended to the lower mould benevolence by concave position, and a plurality of second exhaust grooves divide into two sets of, and two sets of exhaust grooves extend to the edge of lower mould benevolence by the both sides of concave position respectively.

Preferably, the second projection is fusiform, and the maximum height of the second projection in the Z direction is smaller than the maximum width of the second projection in the Y direction.

The semi-solid die-casting molding method of the flaky aluminum alloy section adopts the semi-solid die-casting molding device of the flaky aluminum alloy section, and comprises the following steps:

S1, injecting semi-solid aluminum alloy slurry into a connecting port of a feeding channel through an injection mechanism;

S2, aluminum alloy slurry sequentially flows through a feed channel and a runner, the aluminum alloy slurry is guided through a curve in the runner, the height dimension of the aluminum alloy slurry in the Z direction is reduced, and the extension dimension of the aluminum alloy slurry in the Y direction is increased;

S3, injecting the aluminum alloy slurry guided by the runner into the cavity from a feed port continuously extending from one side of the cavity to the other side of the cavity, so that the aluminum alloy slurry is uniformly distributed in the cavity along the Y direction and fills the cavity;

S4, cooling and molding the aluminum alloy slurry in a cavity to obtain the sheet aluminum alloy section.

The invention forms a third pair of connectors with strip-shaped structures at the feeding hole of the die cavity, so that the aluminum alloy slurry can uniformly flow into the die cavity from the third pair of connectors, and the aluminum alloy slurry is uniformly distributed in the die cavity along the width direction (namely Y direction in the drawing) of the die cavity. In addition, because the two-stage necking structure is formed in the feeding channel and at the joint position of the feeding channel and the flow channel, the aluminum alloy slurry entering the flow channel is accelerated and pressurized, and the flow velocity and the pressure of the aluminum alloy slurry at the tail end of the flow channel after being diffused and drained through the curved surface in the flow channel are prevented from being smaller. The structure that the curved surface inside the runner gradually changes in the Z direction makes the area of the third projection that the third pair of interfaces formed be less than the area of the second projection that the second pair of interfaces formed, and the runner forms the structure that outside is big inside is little, on utilizing the runner to drain aluminum alloy thick liquids to each position of die cavity along Y direction, prevent the velocity of flow, the pressure of aluminum alloy thick liquids that flow into the die cavity inside from the runner are too little, then ensure that the aluminum alloy thick liquids that evenly distributes along Y direction has sufficient potential energy in the X direction in order to finally fill whole die cavity, ensure that the inside aluminum alloy thick liquids evenly distributed of die cavity, especially aluminum alloy thick liquids can evenly distribute along Y direction, make the aluminum alloy section that finally forms have higher compactness, and the compactness is comparatively even.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is a schematic view of the lower die of the present invention;

FIG. 5 is a schematic view of the upper die of the present invention;

FIG. 6 is a schematic view of the lower mold insert of the present invention;

FIG. 7 is a schematic view of the upper mold insert of the present invention;

FIG. 8 is a view in the direction C of FIG. 3;

FIG. 9 is a cross-sectional view of a lower die insert of the present invention;

FIG. 10 is a cross-sectional view of an upper die insert of the present invention;

Fig. 11 is an enlarged view at E in fig. 3.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

As shown in fig. 1,2,3, 4, 5, 6, 7, 8, 9, 10 and 11, the semi-solid die casting forming device for sheet aluminum alloy section bar according to the present invention, especially a die casting forming device for injecting semi-solid aluminum alloy slurry into a cavity by an injection mechanism to form sheet aluminum alloy section bar in the cavity, the forming device comprises an upper die 20 and a lower die 10, the upper die 20 and the lower die 10 are clamped to form a die casting mold, the X direction in the drawing is the length direction of the die casting mold, the Y direction is the width direction of the die casting mold, and the Z direction is the height direction of the die casting mold, and a feeding channel 50 is formed between the upper die 20 and the lower die 10 after the upper die 20 and the lower die 10 are clamped to be sequentially arranged from outside to inside along the X direction, The runner 40 and the cavity 30 are communicated with the feeding channel 50 by the injection mechanism, semi-solid aluminum alloy slurry is injected into the feeding channel 50, then the aluminum alloy slurry enters the cavity 30 through the runner 40, and the aluminum alloy slurry fills the cavity 30 and is solidified in the cavity 30 and then processed into sheet-shaped aluminum alloy sections. The side of the cavity 30 facing the runner 40 forms a feed port 31 extending along the Y direction, and two sides of the feed port 31 extend to two sides of the cavity 30 respectively, so that the feed port 31 forms a structure with a larger size along the Y direction and a smaller size along the Z direction, wherein the Y direction and the Z direction of the feed port 31 are matched with the shape of the cavity 30 facing one side of the runner 40, specifically, the extending size of the feed port 31 in the Y direction is equivalent to the size of the inner wall of the cavity 30 near one side of the runner 40, that is, in the Y direction, the inner wall of the cavity 30 near one side of the runner 40 of the feed port 31 is completely overlapped, and the size of the feed port 31 in the Z direction is smaller than or equal to the thickness of the cavity 30. The outer end of the feed channel 50 forms a connection port 51, the cross section of the connection port 51 is arranged in a round shape to adapt to an output joint of an injection mechanism, the inner end of the feed channel 50 forms a first pair of ports 52, the outer end of the flow channel 40 forms a second pair of ports 41 which are in butt joint with the first pair of ports 52, the inner end forms a third pair of ports 42 which are communicated with the feed port 31, wherein the outer contour of the first pair of ports 52 forms a first projection on a YZ plane, the outer contour of the second pair of ports 41 forms a second projection on the YZ plane, and the outer contour of the third pair of ports 42 forms a third projection on the YZ plane; the first projection falls inside the projection formed by the connection port 51 in the YZ plane, that is, inside the feed channel 50, a primary necking structure is formed, and the flow rate and pressure of the aluminum alloy slurry in the semi-solid state are increased through the primary necking structure inside the feed channel 50 in the process of flowing from the connection port 51 to the first pair of connection ports 52; The second projection is located within the first projection, i.e., the second pair of ports 41 of the flow channel 40 is smaller in area than the first pair of ports 52 and is covered by the first pair of ports 52, thereby forming a necked-down step configuration, i.e., a secondary necked-down configuration, at the point where the flow channel 40 engages the feed channel 50. Referring to the structure shown in fig. 8, in the Z-direction, the height of the third projection is smaller than the height of the second projection, and in the Y-direction, the width of the third projection is larger than the width of the second projection, that is, the height H2 of the third pair of interfaces 42 is smaller than the height H1 of the second pair of interfaces 41, and the width W2 of the third pair of interfaces 42 is larger than the width W1 of the second pair of interfaces 41; In the Y direction, two sides of the third pair of ports 42 protrude outside two sides of the feed port 31, that is, in the Y direction, the feed port 31 is covered by the third pair of ports 42, and in the Z direction, at least a part of the third pair of ports 42 is overlapped with the feed port 31, so that the runner 40 and the cavity 30 can be communicated together through the third pair of ports 42 and the feed port 31, a curved surface smoothly transiting from the second feed port 41 to the third feed port 42 is formed on the inner wall of the runner 40, and since the height of the third pair of ports 42 is smaller than the height of the second pair of ports 41 and the width of the third pair of ports 42 is larger than the width of the second pair of ports 41, So that the size of the flow channel 40 in the Z direction gradually decreases from outside to inside and the size of the flow channel 40 in the Y direction gradually increases from outside to inside, and when the semi-solid metal slurry flows from the second pair of connectors 41 to the third pair of connectors 42, the metal slurry is respectively diffused from the center of the flow channel 40 to two sides along the Y direction and is simultaneously influenced by the curved surface shape, and the metal slurry is extruded in the Z direction. The area of the area surrounded by the third projection is smaller than the area surrounded by the second projection, that is, the cross-sectional area of the aluminum alloy slurry flowing through the second butt joint 41 is larger than the cross-sectional area of the aluminum alloy slurry flowing through the third butt joint 42, and even if the curved surface inside the flow channel 40 gradually diffuses to two sides along the Y direction, the structure of gradually changing the curved surface inside the flow channel in the Z direction can enable the flow channel 40 to form a structure with large outside and small inside.

When the forming device of the invention works, the upper die 20 and the lower die 10 are clamped according to the preset position, the injection mechanism is connected to the connecting port 51, the injection mechanism is used for injecting the semisolid aluminum alloy slurry with preset temperature into the feeding channel 50, the aluminum alloy slurry enters the runner 40 through the feeding channel 50, and in the process of flowing the aluminum alloy slurry into the runner 40 from the feeding channel 50, the flow speed and the pressure of the aluminum alloy slurry are increased through a primary necking structure in the feeding channel 50 and a secondary necking structure at the joint of the primary feeding channel 50 and the runner 40, the aluminum alloy slurry is guided by the inner curved surface of the runner 40, the aluminum alloy slurry entering the runner 40 is gradually diffused to two sides along the Y direction in the process of flowing along the X direction, so that the aluminum alloy slurry can be uniformly distributed at the third pair of interfaces 42, and simultaneously, the aluminum alloy slurry is enabled to be in a converging trend in the Z direction, the aluminum alloy slurry is ensured to have enough flow speed and pressure when the aluminum alloy slurry is dispersed and drained at the third pair of interfaces 42, the aluminum alloy slurry can enter the third pair of interfaces 31 and fully flow into the cavity 30 from the Y pair of interfaces to the other sides of the cavity 30 through the Y pair of interfaces, and the cavity 30 can be completely distributed along the Y pair of interfaces and extend to the inner sides of the cavity 30, and the cavity can be completely extended to the cavity 30 is enabled to flow along the Y side of the inner side of the cavity 30.

Compared with the structure in the prior art that the runner is divided into a plurality of flow dividing channels which are distributed at intervals to guide the aluminum alloy slurry into the cavity, the invention forms the third pair of connectors 42 with a strip-shaped structure at the feed port 31 of the cavity 30, so that the aluminum alloy slurry can uniformly flow into the cavity from the third pair of connectors 42, and the aluminum alloy slurry is uniformly distributed in the cavity 30 along the width direction (namely Y direction in the drawing) of the cavity 30. In addition, since the two-stage necking structure is formed inside the feed channel 50 and at the position where the feed channel 50 is connected with the flow channel 40, the aluminum alloy slurry entering the inside of the flow channel 40 is accelerated and pressurized, and the flow velocity and the pressure of the aluminum alloy slurry at the tail end of the flow channel 40 are prevented from being smaller after the aluminum alloy slurry is diffused and drained through the curved surface inside the flow channel 40. The structure that the curved surface inside the runner gradually changes in the Z direction makes the area of the third projection formed by the third pair of interfaces 42 smaller than the area of the second projection formed by the second pair of interfaces 41, and the structure that the outside is large and the inside is small is formed by the runner, so that on the basis that the aluminum alloy slurry is drained to each position of the cavity along the Y direction by utilizing the runner 40, the flow rate and the pressure of the aluminum alloy slurry flowing into the cavity 40 from the runner 40 are prevented from being too small, the aluminum alloy slurry uniformly distributed along the Y direction is ensured to have enough potential energy along the X direction to finally fill the whole cavity 30, the aluminum alloy slurry uniformly distributed in the cavity 30 is ensured, and particularly the aluminum alloy slurry can be uniformly distributed along the Y direction, so that the finally formed aluminum alloy section has higher compactness and more uniform compactness.

As shown in fig. 8, on the basis of the above-mentioned scheme, the second projection has a fusiform shape, the maximum height H1 of the second projection in the Z direction is smaller than the maximum width W1 of the second projection in the Y direction, the second pair of ports 42 are configured in the fusiform structure, and compared with the circular cross section of the connection port 51 of the feed channel 50, the dimensional change rate of the second pair of ports 42 in the Z direction is made larger than the dimensional change rate in the Y direction, so that the extrusion trend of the aluminum alloy slurry in the Z direction is larger than the extrusion trend of the aluminum alloy in the Y direction between the connection port 51 and the second pair of ports 42, thereby facilitating the diffusion of the aluminum alloy slurry in the flow channel 40 along the Y direction to both sides.

In the preferred embodiment, referring to fig. 2, 4 and 5, the lower die 10 comprises a lower die core 11, a lower die insert 12 fixedly connected with the lower die core 11, and a lower barrel shell 13 fixedly connected with the lower die core, wherein the main body of the lower die core 11 is in a square plate-shaped structure, the lower die core 11 is embedded in a notch on the outer side edge of the lower die core 11 and is fixedly connected with the lower die core 11 through a bolt, and the lower barrel shell 13 is arranged on the outer side of the lower die insert 12 and is fixedly connected with the lower die core 11 through a bolt. The upper die 20 comprises an upper die core 21, an upper die insert 22 fixedly connected with the upper die core 21, and a charging barrel upper shell 23 fixedly connected with the upper die core 21, wherein the upper die insert 22 is embedded in a notch on the outer side edge of the upper die core and is fixedly connected with the upper die core 21 through a bolt, and the charging barrel upper shell 23 is arranged on the outer side of the upper die insert 22 and is fixedly connected with the upper die core 21 through a bolt; the cavity 30 is located between the lower die core 11 and the upper die core 21, the runner 40 is located between the lower die insert 12 and the upper die insert 22, the feed channel 50 is located between the lower shell 13 of the feed cylinder and the upper shell 23 of the feed cylinder, the lower die 10 is formed by combining the lower die core 11, the lower die insert 12 and the lower shell 13 of the feed cylinder, so that the lower die core 11, the lower die insert 12 and the lower shell 13 of the feed cylinder are independently processed, the shapes corresponding to the cavity 30, the runner 40 and the feed channel 50 are respectively formed on the lower die core 11, the lower die insert 12 and the lower shell 13 of the feed cylinder, and then the lower die 10 can be conveniently processed after being assembled together, in particular CNC (computerized numerical control) and the like are conveniently utilized for processing; the lower die 20 having an assembled structure can be easily manufactured in the same manner as the upper die 10. Of course, in other embodiments, in order to facilitate assembly and avoid the influence of large tolerance stack-up on the precision of the molding device, the lower mold core 11, the lower mold insert 12 and the lower shell 13 of the cartridge may be integrally configured, and the upper mold core 21, the upper mold insert 22 and the upper shell 23 of the cartridge may be integrally configured.

In the lower die insert 12 and the upper die insert 22 shown in fig. 6 and 7, the upper surface of the lower die insert 12 is recessed downward to form a lower groove 120, the upper surface of the upper die insert 22 is recessed upward to form an upper groove 220, the lower groove 120 and the upper groove 220 together form a runner 40, and the curved surface formed on the inner wall surface of the runner 40 for draining the aluminum alloy paste includes a lower curved surface 121 formed on the inner wall surface of the lower groove 120 and an upper curved surface 221 formed on the inner wall surface of the upper groove 220. Referring to the cross-sectional structure shown in fig. 3, the inner wall surface of the lower groove 120 is further provided with a lower inclined surface 122, that is, the inner wall surface of the lower groove 120 is formed by a lower curved surface 121 and the lower inclined surface 122, the lower inclined surface 122 extends obliquely upward from the inner edge of the lower curved surface 121 to the third pair of interfaces 42, so that the top edge of the lower inclined surface 122 forms the lower edge of the third pair of interfaces 42; The inner wall surface of the upper groove 220 is further provided with an upper inclined surface 222, that is, the inner wall surface of the upper groove 220 is formed by an upper curved surface 221 and an upper inclined surface 222, the upper inclined surface 222 is obliquely extended downwards from the inner edge of the upper curved surface 221 to the third pair of interfaces 42, the bottom edge of the upper inclined surface 222 forms the upper edge of the third pair of interfaces 42, the curved surface on the inner wall surface of the runner 40 is formed by a lower curved surface 121, a lower inclined surface 122, an upper curved surface 221 and an upper inclined surface 222, the part of the runner 40 between the lower curved surface 121 and the upper curved surface 221 is used for compressing the aluminum alloy slurry in the runner 40 in the Z direction, The aluminum alloy paste is spread from the central axis O of the feed passage to both sides in the Y direction, and when passing between the lower inclined surface 122 and the upper inclined surface 222, the extruded and spread aluminum alloy paste is extruded through the necking formation formed by the lower inclined surface 122 and the upper inclined surface 222 after being spread in the Y direction by the lower curved surface 121 and the upper curved surface 221, thereby increasing the flow rate of the aluminum alloy paste flowing from the third pair of interfaces 42 toward the inside of the cavity 30 because the lower inclined surface 122 and the upper inclined surface 222 gradually approach each other in the outside-in direction and form the third pair of interfaces 42 between both ends thereof, For this purpose, referring to the cross-sectional views of the lower die insert 12 and the upper die insert 22 shown in fig. 9 and 10, the lower inclined surface 122 extends in the X-direction by a distance D1, the lower inclined surface 122 extends in the Z-direction by a height M1, the lower curved surface 121 extends in the X-direction by a distance D2, and the lower curved surface 121 extends in the Z-direction by a height M2, wherein M1/D1 is greater than M2/D2; The inclination rate of the lower inclined surface 122 gradually upwards from outside to inside along the X direction is larger than the inclination rate of the lower curved surface 121 gradually upwards from outside to inside along the X direction; The distance of the upper inclined surface 222 extending along the X direction is D3, the height of the upper inclined surface 222 extending along the Z direction is M3, the distance of the upper curved surface 221 extending along the X direction is D4, the height of the upper curved surface 221 extending along the Z direction is D4, M3/D3 is larger than M4/D4, the gradually downward inclination rate of the upper inclined surface 222 along the X direction is larger than the gradually downward inclination rate of the upper curved surface 221 along the X direction from outside to inside, and therefore, in the direction of the runner 40 along the X direction from outside to inside, the aluminum alloy slurry can have larger potential energy after passing between the lower inclined surface 122 and the upper inclined surface 222 so as to fill the cavity 30. In order to further enhance the guiding and extruding effects of the lower inclined surface 122 and the upper inclined surface 222 on the aluminum alloy slurry, the projection widths of the lower inclined surface 122 and the upper inclined surface 222 on the XY plane are gradually reduced from the middle to the two sides, namely, the widths of the lower inclined surface 122 and the upper inclined surface 222 at the parts close to the central axis O of the feeding channel 50 are larger, the widths of the lower inclined surface 122 and the upper inclined surface 222 at the two sides in the Y direction are smaller, and the distance of the aluminum alloy slurry at the center of the runner flowing through the lower inclined surface 122 and the upper inclined surface 222 is prolonged, so that the aluminum alloy slurry at different positions distributed along the Y direction on the third pair of interfaces 42 can enter the cavity 30 more uniformly.

Referring to fig. 11, in the preferred embodiment, the thickness of the aluminum alloy section processed by the forming device of the present invention is within 0.8mm, so that the height of the cavity 30 in the Z direction is smaller, the third pair of interfaces 42 and the feeding port of the cavity 30 are offset a certain distance in the Z direction, specifically, the upper edge 422 of the third pair of interfaces 42 is higher than the upper edge 312 of the feeding port 31, the lower edge 421 of the third pair of interfaces 42 is located between the upper edge 312 and the lower edge 311 of the feeding port 31, so that the third pair of interfaces 42 and the feeding port 31 are offset in the Z direction, and a part of the aluminum alloy slurry can enter the cavity through the lower edge 421 of the third pair of interfaces 42 and the upper edge 312 of the feeding port 31 in the Z direction, and because the third pair of interfaces 42 are offset a certain distance in the Z direction relative to the feeding port 31, the aluminum alloy slurry can enter the cavity from top to bottom in a trend, so that the aluminum alloy slurry can be easily guided into the cavity 30, and in addition, the thickness of the third pair of interfaces 42 and the feeding port 31 can be processed only by the upper edge 312 and the bottom edge 31 in the Z direction relative to the thickness of the feeding port 31 is smaller than the upper edge 312 of the top edge 31, and the thickness of the third pair of interfaces can be processed by the die, and the thickness of the third pair of interfaces can be reduced by the thickness and the thickness of the upper edge 31 and the top edge of the interface can be only and the thickness of the top edge 31 and the top edge of the top edge 31 of the interface can be reduced by a certain thickness and the thickness of the interface and the top surface of the interface is only and the thickness of the thickness can be only and the thickness can be smaller. Of course, it should be noted that when the thickness of the sheet-shaped aluminum alloy section is greater than 2mm, the third pair of ports 42 may be aligned with the feed port 31, i.e., the upper edges of the third pair of ports 42 are flush with the upper edges of the feed port 31, and the lower edges of the third pair of ports 42 are flush with the lower edges of the feed port 31; alternatively, the upper edge and the lower edge of the third pair of ports 42 may be disposed between the upper edge and the lower edge of the feed port 31, so that the first-stage necking structure is formed at the position where the third pair of ports 42 is engaged with the feed port 31, so that the aluminum alloy paste is injected into the cavity 30 at a higher pressure.

Referring to fig. 1, 4 and 5, a semicircular concave position 131 is disposed on the lower shell 13 of the feed cylinder, a semicircular concave position 231 is disposed on the upper shell 23 of the feed cylinder, the semicircular concave position 131 and the semicircular concave position 231 together form a feed channel 50, so that a main body of the feed channel 50 is in a cylindrical structure, a part of the bottom surface of the semicircular concave position 131 is recessed downwards to form a sink 133, and impurities on the surface of the aluminum alloy slurry can sink into the sink 133 during the process of flowing the aluminum alloy slurry through the feed channel 50, so as to prevent the impurities from entering into the cavity 30 along with the aluminum alloy slurry, and then the quality of the aluminum alloy profile is improved. The inner end of the lower shell 13 of the feed cylinder is provided with the lower baffle wall 132 extending inward along the radial direction of the feed channel 50, the lower baffle wall 132 is positioned at the inner side of the sink 133, the inner end of the upper shell 23 of the feed cylinder is provided with the upper baffle wall 232 extending inward along the radial direction of the feed channel 50, the inner edge of the lower baffle wall 132 and the inner edge of the upper baffle wall 232 jointly enclose the first pair of interfaces 52, the first-stage necking structure is formed inside the feed channel 50 through the lower baffle wall 132 and the upper baffle wall 232, the flow rate and the pressure of the aluminum alloy slurry are increased, the upper baffle wall 232 and the lower baffle wall 132 can also be beneficial to removing surface impurities of the aluminum alloy slurry, in particular, the impurities of the semi-solid aluminum alloy slurry are generally positioned on the surface of the aluminum alloy slurry, when the aluminum alloy slurry flows through the upper baffle wall 232 and the lower baffle wall 132, the impurities on the surface are blocked by the upper baffle wall 232 and the lower baffle wall 132, and the impurities sink into the sink 133 under the action of the baffle wall 232 and the lower baffle wall 132.

Referring to fig. 2, 4 and 5, the upper surface 110 of the lower mold core 11 is provided with a concave position 111 which is concave downwards, the lower surface of the upper mold core 21 is provided with a concave position 211 which is concave upwards, after the upper mold 10 and the lower mold 20 are assembled, the concave position 111 and the concave position 211 form a cavity 30 together, the upper surface 110 of the lower mold core 11 is provided with a plurality of first air discharge grooves 112 and a plurality of second air discharge grooves 113, the first air discharge grooves 112 extend from one side of the concave position 111 away from the feed inlet 31 to the edge of the lower mold core 11, and the plurality of first air discharge grooves 112 are arranged along the Y direction; the plurality of second air discharge grooves 113 are divided into two groups, the two groups of second air discharge grooves 113 are respectively located at two sides of the lower die core 11, the second air discharge grooves 113 extend to the edge of the lower die core 11 from the corresponding side edge of the concave position 111, after the upper die 20 and the lower die 10 are assembled, the plurality of first air discharge grooves 112 and the plurality of second air discharge grooves 113 form a plurality of air discharge channels which are arranged along the edge (except one side of the feeding hole 31) of the die cavity 30, the plurality of air discharge channels discharge air in the die cavity 30 outwards into the external environment while the aluminum alloy slurry enters the die cavity 30, and the plurality of air discharge channels can enable the edge (except one side of the feeding hole 31) of the die cavity 30 to uniformly discharge air to the external environment, so that the aluminum alloy slurry can be uniformly distributed in the die cavity 30 is further ensured.

The semi-solid die-casting forming method of the flaky aluminum alloy section adopts the die-casting forming device, and comprises the following steps:

s1, injecting semi-solid aluminum alloy slurry into a connecting port of a feed channel 50 through an injection mechanism;

s2, aluminum alloy slurry sequentially flows through the feeding channel 50 and the flow channel 40, the aluminum alloy slurry is guided through the curved surface in the flow channel 40, the height dimension of the aluminum alloy slurry in the Z direction is reduced, and the extension dimension of the aluminum alloy slurry in the Y direction is increased;

S3, injecting the aluminum alloy slurry guided by the runner 40 into the cavity 30 from a feed port 31 continuously extending from one side of the cavity 30 to the other side of the cavity 30, so that the aluminum alloy slurry is uniformly distributed in the cavity 30 along the Y direction and fills the cavity 30;

S4, cooling and molding the aluminum alloy slurry in the cavity 30 to obtain the sheet aluminum alloy section.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (12)

1. The semi-solid die-casting forming device of the flaky aluminum alloy section is characterized by comprising an upper die and a lower die;

a feeding channel, a runner and a cavity are formed between the upper die and the lower die, which are sequentially communicated from outside to inside along the X direction, and the outer side end of the feeding channel is connected with an injection mechanism so that semi-solid aluminum alloy slurry ejected by the injection mechanism can enter the cavity through the feeding channel and the runner;

one side of the cavity facing the runner forms a feeding hole extending along the Y direction, and two sides of the feeding hole extend to two sides of the cavity respectively; the outer side end of the feeding channel forms a connecting port which is connected with the injection mechanism and has a circular section, the other end forms a first pair of interfaces, the outer side end of the flow channel forms a second pair of interfaces which are in butt joint with the first pair of interfaces, and the inner side end forms a third pair of interfaces which are communicated with the feeding port;

The outer contour of the first pair of interfaces forms a first projection on a YZ plane, the outer contour of the second pair of interfaces forms a second projection on the YZ plane, and the outer contour of the third pair of interfaces forms a third projection on the YZ plane; the first projection falls into the projection of the outer contour of the connecting port on the YZ plane, and the second projection falls into the first projection; in the Z direction, the height of the third projection is smaller than the height of the second projection, and the width of the third projection in the Y direction is larger than the width of the second projection; the area of the area surrounded by the third projection is smaller than that of the area surrounded by the second projection;

Two sides of the third pair of interfaces in the Y direction respectively protrude out of two sides of the feed inlet, and at least one part of the third pair of interfaces in the Z direction coincides with the feed inlet so that the third pair of interfaces and the feed inlet communicate the runner with the cavity; forming a curved surface smoothly transiting from the second feed port to the third feed port on the inner wall of the runner;

the X direction, the Y direction and the Z direction are respectively the length direction, the width direction and the height direction of the die-casting mould formed after the upper die and the lower die are clamped.

2. The semi-solid state die casting forming device of sheet aluminum alloy section bar as defined in claim 1, wherein the lower die comprises a lower die core, a lower die insert fixedly connected with the lower die core, and a lower shell of a charging barrel fixedly connected with the lower die core, and the upper die comprises an upper die core, an upper die insert fixedly connected with the upper die core, and an upper shell of the charging barrel fixedly connected with the upper die core; the cavity is positioned between the lower die core and the upper die core, the runner is positioned between the lower die insert and the upper die insert, and the feeding channel is positioned between the lower shell of the charging barrel and the upper shell of the charging barrel.

3. The semi-solid state die casting molding apparatus of sheet aluminum alloy section as claimed in claim 2, wherein the upper surface of the lower die insert is downwardly recessed to form a lower recess, the upper surface of the upper die insert is upwardly recessed to form an upper recess, the lower recess and the lower recess together form the runner, and the curved surface comprises a lower curved surface formed by an inner wall surface of the lower recess and an upper curved surface formed by an inner wall surface of the upper recess.

4. A semisolid die-casting forming device for the sheet aluminum alloy profile according to claim 3, wherein a lower inclined surface is arranged on the inner wall surface of the lower groove, and the lower inclined surface extends upwards from the inner edge of the lower curved surface to the third pair of interfaces in an inclined manner, so that the top edge of the lower inclined surface forms the lower edge of the third pair of interfaces; an upper inclined plane is arranged on the inner wall surface of the upper groove, and the upper inclined plane extends downwards from the inner edge of the upper curved surface to the third pair of interfaces in an inclined manner, so that the bottom edge of the upper inclined plane forms the upper edge of the third pair of interfaces; the lower curved surface, the lower inclined surface, the upper curved surface and the upper inclined surface form a curved surface together.

5. The semi-solid state die casting molding apparatus of sheet aluminum alloy section bar according to claim 4,

The distance of the lower inclined surface extending along the X direction is D1, the height of the lower inclined surface extending along the Z direction is M1, the distance of the lower curved surface extending along the X direction is D2, and the height of the lower curved surface extending along the Z direction is M2, wherein M1/D1 is larger than M2/D2;

the distance that the upper inclined plane extends along X direction is D3, and the height that the upper inclined plane extends along Z direction is M3, and the distance that the upper curved surface extends along X direction is D4, and the height that the upper curved surface extends along Z direction is D4, wherein M3/D3 is greater than M4/D4.

6. The semi-solid die casting apparatus of sheet aluminum alloy section as defined in claim 4, wherein the widths of the projections of the upper and lower slopes on the XY plane gradually decrease from the middle toward both sides.

7. The apparatus for semi-solid die casting of sheet aluminum alloy sections as defined in claim 4, wherein the upper edge of the third pair of ports is higher than the upper edge of the feed port, and the lower edge of the third pair of ports is located between the upper edge of the feed port and the lower edge of the feed port so that at least a portion of the third pair of ports coincides with the feed port in the Z direction.

8. The semi-solid state die casting forming device of sheet aluminum alloy section bar as defined in claim 2, wherein a semi-circular concave position is arranged on the lower shell and the upper shell of the charging barrel, the two semi-circular concave positions form a charging channel together and make the charging channel in a cylindrical structure, and the bottom surface of the semi-circular concave position of the lower shell of the charging barrel is concave downwards to form a sinking groove for precipitating impurities in semi-solid state aluminum alloy slurry.

9. The semi-solid die casting device of sheet aluminum alloy section bar according to claim 8, wherein the inner side end of the lower shell of the charging barrel is provided with a lower baffle wall extending inwards along the radial direction of the charging channel and positioned at the inner side of the sink, the inner side end of the upper shell of the charging barrel is provided with an upper baffle wall extending inwards along the radial direction of the charging channel, and the inner edge of the lower baffle wall and the inner edge of the upper baffle wall jointly enclose a first pair of interfaces.

10. The semi-solid state die casting forming device of sheet aluminum alloy section bar as claimed in claim 2, wherein the upper surface of the lower die core is provided with a downward concave position, the lower surface of the upper die core is provided with an upward concave position, the cavity is composed of the downward concave position and the upward concave position, the upper surface of the lower die core is provided with a plurality of first exhaust grooves and a plurality of second exhaust grooves, the first exhaust grooves extend from one side of the downward concave position away from the feed inlet to the edge of the lower die core, the plurality of second exhaust grooves are divided into two groups, and the two groups of exhaust grooves extend from two sides of the downward concave position to the edge of the lower die core respectively.

11. The semi-solid die casting device of sheet aluminum alloy sections as defined in claim 1, wherein the second projection is a shuttle, and the maximum height of the second projection in the Z direction is smaller than the maximum width of the second projection in the Y direction.

12. Semi-solid die casting method of sheet aluminum alloy profile, characterized in that the semi-solid die casting device of sheet aluminum alloy profile according to any one of claims 1-11 is adopted, comprising the following steps:

S1, injecting semi-solid aluminum alloy slurry into a connecting port of a feeding channel through an injection mechanism;

S2, aluminum alloy slurry sequentially flows through a feed channel and a runner, the aluminum alloy slurry is guided through a curve in the runner, the height dimension of the aluminum alloy slurry in the Z direction is reduced, and the extension dimension of the aluminum alloy slurry in the Y direction is increased;

S3, injecting the aluminum alloy slurry guided by the runner into the cavity from a feed port continuously extending from one side of the cavity to the other side of the cavity, so that the aluminum alloy slurry is uniformly distributed in the cavity along the Y direction and fills the cavity;

S4, cooling and molding the aluminum alloy slurry in a cavity to obtain the sheet aluminum alloy section.