Aluminum profile hot extrusion die with cooling function

Abstract

The utility model relates to the technical field of aluminum profile extrusion dies, in particular to an aluminum profile hot extrusion die with a cooling function, which comprises a die sleeve, a front die and a die cushion, a U-shaped clamping groove is arranged in the middle of the die sleeve, the die cushion consists of an upper die cushion and a lower die cushion, the front die, the upper die cushion and the lower die cushion are clamped in the U-shaped clamping groove, a stepped flow guide hole is arranged in the center of the front die, and the upper die cushion and the lower die cushion are clamped in the U-shaped clamping groove. The centers of the upper die cushion and the lower die cushion are correspondingly provided with an upper die hole and a lower die hole, the upper die hole is similar to the rear end face of the die core in shape, the rear end of the die core is inserted into the middle of the upper die hole in a suspended mode, a forming gap is reserved between the die core and the upper die hole, and a nitrogen channel is formed in the front end face of the lower die cushion. The front die and the die cushion of the aluminum profile hot extrusion die are mounted in a plug-pull manner, so that mounting and dismounting are more convenient, the die cushion is cooled by nitrogen instead of water, the cooling effect is better, water consumption and water pollution can be reduced, the die is convenient to dismount and mount, and the die replacement time is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum profile extrusion dies, and particularly relates to a hot extrusion die for aluminum profiles with cooling means. Background Art

[0002] Most existing aluminum profile production lines adopt a hot extrusion forming process, that is, aluminum bars are heated and then extruded from a die under pressure to form aluminum profiles with specific shapes. An aluminum profile extrusion die generally consists of a die sleeve, a die arranged inside the die sleeve, and a die cushion arranged on one side of the die. The die cushion usually includes structures such as a die core and die holes. Since the temperature of the hot-extruded aluminum profile is still very high, it needs to be cooled in time. However, it is difficult to set up cooling channels on the die, so generally cooling channels are opened on the die cushion to cool the extruded aluminum profile. Traditional extrusion die cushion cooling channels mostly use water cooling, which consumes a large amount of water resources and increases the burden of sewage treatment. At present, some aluminum profile extrusion die cushions also use nitrogen cooling, but the structural design of the die cushion cooling channels is not perfect yet. For example, there is a problem that the die cushion cooling channels are prone to blockage. In addition, the existing extrusion dies also have problems such as poor universality of the die cushion, inconvenient installation and replacement of the die, etc. Therefore, the hot extrusion die for aluminum profiles still needs to be continuously improved and perfected. Summary of the Utility Model

[0003] In view of the above situation, the utility model provides a hot extrusion die for aluminum profiles with cooling means. The positive die and the die cushion adopt a plug-and-play installation method, which is more convenient for installation and disassembly. The die cushion uses nitrogen cooling instead of water cooling, and the cooling effect is better.

[0004] In order to achieve the above purposes, the utility model adopts the following technical solutions:

[0005] A hot extrusion die for aluminum profiles with cooling means includes a die sleeve, a positive die, and a die cushion. The die sleeve is a rectangular block structure with a U-shaped card slot opened in the middle. The die cushion is composed of an upper die cushion and a lower die cushion connected coaxially. In the extrusion direction of the aluminum profile, the positive die, the upper die cushion, and the lower die cushion are sequentially clamped in the U-shaped card slot from front to back. Feeding ports and discharging ports are cooperatively opened on the front and rear end walls of the die sleeve.

[0006] The positive die, the upper die cushion, and the lower die cushion are all horizontal disc-shaped structures. A diversion hole for guiding the feeding of aluminum bars is coaxially penetrated through the center of the positive die. The diversion hole is a stepped diversion hole with a gradually decreasing diameter from front to back. A die core is hollowly arranged through four shunt bridges arranged in an X shape in the center of the diversion hole. The gap between the die core and the diversion hole is separated into four shunt holes by the four shunt bridges.

[0007] The centers of the upper die pad and the lower die pad are respectively provided with an upper die hole and a lower die hole. The upper die hole is similar in shape to the rear end face of the die core, and the rear end of the die core is inserted into the middle of the upper die hole in a suspended manner. A forming gap for aluminum profile extrusion is provided between the die core and the upper die hole.

[0008] The lower die hole is an oval through hole, and a nitrogen channel for blowing cooling nitrogen into the lower die hole is provided on the front end face of the lower die pad.

[0009] Further, the nitrogen channel includes an inner air duct and an outer air duct provided on the surface of one end of the lower die pad close to the upper die pad. Both the inner air duct and the outer air duct are oval air ducts concentric with the lower die hole. A plurality of intermediate air ducts for connecting the two air ducts are annularly arranged at equal intervals between the inner and outer air ducts. An air inlet duct communicating with the outer air duct is penetrated through the side wall of the lower die pad for externally connecting cooling nitrogen. A plurality of air outlet ducts are annularly arranged at equal intervals between the inner air duct and the lower die hole for blowing cooling nitrogen onto the surface of the aluminum profile. A plurality of regulating valve assemblies for correspondingly controlling the air output of each air outlet duct are annularly arranged around the lower die hole of the upper die pad.

[0010] Further, the regulating valve assembly includes a valve block that can telescopically block or release the air outlet duct, and a valve rod for driving the telescopic movement of the valve block. A track hole for the telescopic sliding of the valve block is correspondingly provided on the upper die pad. The valve block is slidably disposed inside one end of the track hole close to the lower die pad. The valve rod is rotatably coaxially inserted into the inside of the track hole. The valve rod is a semi-tooth long rod bolt. The threaded end of the valve rod is threadedly connected to the valve block. An internal threaded hole is cooperatively provided inside the valve block. The smooth rod end of the valve rod is rotatably clamped with the inner wall of the track hole through a circlip. A clamping ring groove is cooperatively provided on the outer side wall of the valve rod.

[0011] Further, the inner air duct, the outer air duct, the intermediate air duct, and the air outlet duct are all open groove types provided on the end face surface of the lower die pad. The upper die pad is detachably covered on the open side of each groove-type air duct of the lower die pad. An abutting groove matched with the top end of the valve block is provided on the side wall of the air outlet duct of the lower die pad.

[0012] Further, a flange-type screw connection method is adopted between the upper die pad and the lower die pad. A plurality of flange screw holes are annularly and evenly distributed on the peripheral edge of the upper die pad. Flange screw grooves corresponding to each flange screw hole are cooperatively provided on the end face edge of the lower die pad.

[0013] Further, the end faces of the side where the upper die pad and the lower die pad are connected to each other are both smooth mirror surfaces. Three positioning pins are annularly and evenly distributed on the connecting end face of the upper die pad. Positioning grooves corresponding to each positioning pin are cooperatively provided on the connecting end face of the lower die pad.

[0014] Furthermore, the radius of the arc at the bottom of the U-shaped card slot in the middle of the die sleeve is adapted to the radius of the discs of the positive die and the upper and lower die pads. The inlet and outlet ports at both ends of the die sleeve are also U-shaped ports. Moreover, the radius of the arc at the bottom of the U-shaped port of the inlet and outlet ports and the width of the upper opening are smaller than the corresponding dimensions of the U-shaped card slot. That is, there are inwardly protruding clamping step portions provided between the front and rear ends of the U-shaped card slot and the inlet and outlet ports, which are used to limit and fix the positive die and the lower die pad.

[0015] The present utility model further includes other components that enable its normal use, all of which are conventional means in the art. In addition, the devices or components not defined in the present utility model, such as: half-thread long rod bolts, circlip retainers, and positioning pins, as well as nitrogen gas source equipment and aluminum profile extrusion presses, etc., all adopt the existing technologies in the art.

[0016] The beneficial effects of the present utility model are as follows:

[0017] A hot extrusion die for aluminum profiles with cooling provided by the present utility model has a matching die pad cooled by nitrogen, with better cooling effect, and is beneficial to reducing the water resource consumption cost and the water pollution treatment cost. The air passage structure design is convenient for disassembly and cleaning to solve the problem of air passage blockage. Moreover, the die pad has strong versatility, which helps to reduce the die replacement frequency. At the same time, the die adopts a plug-in installation method, which is convenient for disassembling and installing on the die sleeve of the extrusion press, saving the die replacement time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a longitudinal section structure schematic diagram of the hot extrusion die for aluminum profiles with cooling in the embodiment.

[0019] Figure 2 For Figure 1 It is a schematic diagram of the end face structure of the lower die pad along the line A-A in

[0020] Figure 3 For Figure 1 It is a schematic diagram of the end face structure of the upper die pad along the direction B in

[0021] Figure 4 For Figure 1 It is an enlarged structure schematic diagram of the regulating valve assembly at part C in

[0022] Figure 5 For Figure 1 It is a three-dimensional structure schematic diagram of the die sleeve in

[0023] Figure 6 For Figure 1 It is a disassembled structure schematic diagram of the upper and lower die pads in

[0024] Figure 7 For Figure 1 It is a schematic diagram of the structure of the positive die and its die core and the flow dividing bridge in Detailed implementation manners

[0025] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments.

[0026] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. indicating the orientation or position relationship are all based on the figures shown, only for the convenience of description.

[0027] Embodiment

[0028] As Figure 1-7 shown, an aluminum profile hot extrusion die with cooling includes a die sleeve 1, a positive die 2, and a die pad. The die sleeve is a rectangular block structure with a U-shaped card slot 3 opened in the middle. The die pad is composed of an upper die pad 4 and a lower die pad 5 connected coaxially. According to the extrusion direction of the aluminum profile, the positive die, the upper die pad, and the lower die pad are sequentially clamped in the U-shaped card slot from front to back. Feed ports 6 and discharge ports 7 are cooperatively opened on the front and rear end walls of the die sleeve, which are respectively used for feeding aluminum bars and discharging aluminum profiles.

[0029] The positive die and the upper and lower die pads are all horizontal disc-shaped structures. A diversion hole 8 for guiding the feeding of aluminum bars is coaxially penetrated through the center of the positive die. The diversion hole is a stepped diversion hole with a gradually decreasing diameter from front to back. The center of the diversion hole is integrally hollowed and connected with a die core 10 through four shunt bridges 9 arranged in an X shape. The gap between the die core and the diversion hole is divided into four shunt holes 11 by the four shunt bridges. The incoming aluminum bars will be divided into four petals by the die core and the four shunt bridges, and respectively continue to travel along the four shunt holes.

[0030] Upper die holes 12 and lower die holes 13 are respectively opened corresponding to the centers of the upper die pad and the lower die pad. The upper die hole is similar in shape to the rear end face of the die core, and the rear end of the die core is suspended and inserted into the middle of the upper die hole. A forming gap 14 for extruding the aluminum profile is left between the die core and the upper die hole. The shape of the forming gap is the cross-sectional shape of the extruded aluminum profile.

[0031] The lower die hole is an oval through hole, and a nitrogen channel for blowing cooling nitrogen into the lower die hole is opened on the front end face of the lower die pad.

[0032] The nitrogen channel includes an inner air channel 15 and an outer air channel 16 formed on the surface of one end of the lower die pad close to the upper die pad. Both the inner air channel and the outer air channel are oval air channels concentrically arranged with the lower die hole. A plurality of intermediate air channels 17 for connecting the two air channels are annularly arranged at equal intervals between the inner and outer air channels. An air inlet channel 18 communicating with the outer air channel is penetratingly formed on the side wall of the lower die pad for externally connecting cooling nitrogen. A number of air outlet channels 19 are annularly arranged at equal intervals between the inner air channel and the lower die hole for blowing cooling nitrogen onto the surface of the aluminum profile. A number of regulating valve assemblies for correspondingly controlling the air output of each air outlet channel are annularly arranged around the lower die hole of the upper die pad.

[0033] The regulating valve assembly includes a valve block 20 that can telescopically block or release the air outlet channel, and a valve rod 21 for driving the telescopic movement of the valve block. A track hole 22 for the telescopic sliding of the valve block is correspondingly formed on the upper die pad. The valve block is slidably disposed inside one end of the track hole close to the lower die pad. The valve rod is rotatably coaxially disposed inside the track hole. The valve rod is a half-thread long rod bolt. The threaded end of the valve rod is threadedly connected to the valve block. An internal threaded hole 23 is cooperatively formed inside the valve block. The smooth rod end of the valve rod is rotatably clamped to the inner wall of the track hole through a circlip 24. A clamping ring groove 25 is cooperatively formed on the outer side wall of the valve rod.

[0034] The inner air channel, the outer air channel, the intermediate air channel, and the air outlet channel are all open groove types formed on the end face surface of the lower die pad. The upper die pad is detachably covered on the open side of each groove-shaped air channel of the lower die pad. An abutting groove 26 matching the top end of the valve block is provided on the side wall of the air outlet channel of the lower die pad.

[0035] A flange-type screw connection method is adopted between the upper die pad and the lower die pad. A plurality of flange screw holes 27 are annularly and evenly distributed on the peripheral edge of the upper die pad. Flange screw grooves 28 corresponding to the respective flange screw holes are cooperatively formed on the end face edge of the lower die pad.

[0036] The end faces of the upper die pad and the lower die pad on the side where they are connected are both smooth mirror surfaces. And three positioning pins 29 are annularly and evenly distributed on the connecting end face of the upper die pad. Positioning grooves 30 corresponding to the respective positioning pins are cooperatively formed on the connecting end face of the lower die pad.

[0037] An air joint 31 is also threadedly connected to the air inlet end of the air inlet channel for plugging in an air pipe and externally connecting it to a nitrogen gas source device. The externally connected nitrogen gas source device can be a nitrogen gas cylinder or a nitrogen gas station, etc. The externally connected nitrogen gas source device adopts the prior art and will not be elaborated here specifically.

[0038] The radius of the bottom arc of the U-shaped card slot in the middle of the die sleeve is adapted to the disc radii of the positive die and the upper and lower die pads. The inlet and outlet openings at both the front and rear ends of the die sleeve are also U-shaped openings. Moreover, the radius of the bottom arc of the U-shaped opening of the inlet and outlet openings and the width of the upper opening are both smaller than the corresponding dimensions of the U-shaped card slot. That is, there are inwardly protruding clamping step portions 32 provided between the front and rear ends of the U-shaped card slot and the inlet and outlet openings, which are used to limit and fix the positive die and the lower die pad.

[0039] On the left and right side walls of the die sleeve, there are also integrally fixed outwardly protruding mounting step portions 33, which facilitate the positioning and clamping installation of the die sleeve on the aluminum profile extruder. The aluminum profile extruder is a prior art and will not be described in detail here.

[0040] The technical solution of the present utility model is not limited to the limitations of the above specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to those of ordinary skill in the art. Any technical deformation made within the spirit and principle of the present utility model falls within the protection scope of the present utility model.

Claims

1. A hot extrusion die for aluminum profiles with cooling, comprising a die sleeve, a positive die, and a die pad, characterized in that: The die sleeve is a rectangular block structure with a U-shaped slot in the middle, and the die pad is composed of an upper die pad and a lower die pad connected coaxially. According to the extrusion direction of the aluminum profile, the positive die, the upper die pad and the lower die pad are sequentially clamped in the U-shaped slot from front to back, and the front and rear end walls of the die sleeve are matched with a feed port and a discharge port; the positive die and the upper and lower die pads are all horizontal disc-shaped structures, and a guide hole for guiding the feeding of aluminum bars is coaxially penetrated in the center of the positive die, and the guide hole is a stepped guide hole with a diameter that decreases step by step from front to back, and the center of the guide hole is A mold core is hollowed out through four diverter bridges arranged in an X shape, and the gap between the mold core and the guide hole is divided into four diverter holes by four diverter bridges; an upper mold hole and a lower mold hole are respectively opened in the centers of the upper mold pad and the lower mold pad, the upper mold hole is shaped like the rear end face of the mold core, and the rear end of the mold core is suspended and inserted into the middle of the upper mold hole, and a molding gap for extrusion of aluminum profiles is reserved between the mold core and the upper mold hole; the lower mold hole is an elliptical through hole, and a nitrogen channel for blowing cooling nitrogen into the lower mold hole is opened on the front end face of the lower mold pad.

2. The aluminum profile hot extrusion die with cooling according to claim 1, characterized in that: The nitrogen channel includes an inner air channel and an outer air channel opened on the surface of one end of the lower mold pad close to the upper mold pad. Both the inner air channel and the outer air channel are elliptical air channels arranged concentrically with the lower mold hole. A plurality of intermediate air channels for connecting the two air channels are arranged in an annular manner with equal intervals between the inner and outer air channels. An air inlet channel connected to the outer air channel is opened through the side wall of the lower mold pad for external cooling nitrogen. A plurality of air outlet channels are arranged in an annular manner with equal intervals between the inner air channel and the lower mold hole for blowing cooling nitrogen to the surface of the aluminum profile. A plurality of regulating valve assemblies for correspondingly controlling the air outlet volume of each air outlet channel are arranged around the lower mold hole of the upper mold pad.

3. The aluminum profile hot extrusion die with cooling according to claim 2, characterized in that: The regulating valve assembly includes a valve block that can telescopically block or release the air outlet, and a valve stem for driving the valve block to telescopically move; a track hole for the telescopic sliding of the valve block is correspondingly opened on the upper mold pad, the valve block is slidably placed inside the track hole at one end close to the lower mold pad, the valve stem is rotatably coaxially penetrated inside the track hole, the valve stem is a half-tooth long-stem bolt, the threaded end of the valve stem is threadedly connected to the valve block, an internal threaded hole is cooperatively opened inside the valve block, the smooth rod end of the valve stem is rotatably clamped to the inner wall of the track hole through a retaining ring, and a clamping ring groove is cooperatively opened on the outer side wall of the valve stem.

4. The aluminum profile hot extrusion die with cooling according to claim 3, characterized in that: The inner air channel, outer air channel, middle air channel and outlet channel are all open groove-type channels opened on the end surface of the lower mold pad. The removable cover of the upper mold pad is arranged on the open side of each groove-type air channel of the lower mold pad. The side wall of the outlet channel of the lower mold pad is provided with an abutment groove matching the top of the valve block.

5. The aluminum profile hot extrusion die with cooling according to claim 4, characterized in that: The upper die pad and the lower die pad are connected by a flange-type screw connection. The circumferential edge of the upper die pad is evenly distributed with multiple flange screw holes, and the end face edge of the lower die pad is matched with flange screw grooves corresponding to the flange screw holes.

6. The aluminum profile hot extrusion die with cooling according to claim 5, characterized in that: The end faces of one side where the upper mold pad and the lower mold pad are connected to each other are both smooth mirror surfaces, and three positioning pins are evenly distributed in a ring on the connecting end face of the upper mold pad, and the connecting end face of the lower mold pad is matched with positioning grooves corresponding to the positioning pins.

7. The aluminum profile hot extrusion die with cooling according to any one of claims 1 to 6, characterized in that: The bottom arc radius of the U-shaped slot in the middle of the mold sleeve is compatible with the disc radius of the positive mold and the upper and lower mold pads. The inlet and outlet ports at the front and rear ends of the mold sleeve are also U-shaped ports, and the bottom arc radius and upper opening width of the U-shaped ports are smaller than the corresponding dimensions of the U-shaped slot.

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