Nitrogen cooling dummy block die cushion

Abstract

The utility model relates to a nitrogen cooling dummy block die cushion in the technical field of aluminum profile production, which comprises a disc-shaped upper die cushion and a disc-shaped lower die cushion which are detachably and coaxially attached and connected, and an elliptical upper die hole and an elliptical lower die hole are respectively and correspondingly formed in the center of the upper die cushion and the center of the lower die cushion; the surface of one end, close to the upper die cushion, of the lower die cushion is provided with an elliptical inner air passage and an elliptical outer air passage which are concentrically sleeved with the lower die hole, a plurality of middle air passages are communicated between the inner air passage and the outer air passage at equal intervals, the side wall of the lower die cushion is provided with an air inlet passage communicated with the outer air passage in a penetrating manner, and a plurality of air outlet passages are annularly arranged between the inner air passage and the lower die hole at equal intervals; a plurality of adjusting valve assemblies used for correspondingly controlling the air output of the air outlet channels are annularly arranged around the lower die hole of the upper die cushion. According to the die cushion, the upper die cushion body and the lower die cushion body which are assembled in a split mode are adopted, so that all the air channels can be detached and split to be conveniently dredged and cleaned; and the nitrogen output of each air passage can be regulated and controlled, so that each part of the aluminum profile can obtain relatively balanced cooling rate.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum profile production, and particularly relates to a nitrogen-cooled extrusion pad die cushion. Background Art

[0002] Aluminum profiles are important building materials often used in the modern building decoration construction process, and are commonly used to manufacture home decoration components such as doors, windows, and partitions. At present, the production of aluminum profiles generally adopts an extrusion molding process, that is, an aluminum rod is extruded from a mold under pressure to form an aluminum profile with a specific shape. An aluminum profile extrusion die generally consists of three major parts: 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, and cooling channels are often provided in the die cushion to cool down the extruded aluminum profile. Some die cushions use water cooling, and some die cushions use more advanced nitrogen cooling.

[0003] However, there are still some problems with the existing nitrogen-cooled die cushions. For example, a special pad for an aluminum profile extrusion die with nitrogen passing through, provided in the patent document with the publication number CN212682074U, has its secondary air channels similar in shape to the extrusion die holes of the aluminum profile, ensuring that the distances from each air outlet to the surface of the aluminum profile are basically equal, and can spray nitrogen relatively evenly onto the aluminum profile to form a nitrogen diaphragm, which can reduce the extrusion friction and improve the surface finish of the extruded aluminum profile.

[0004] However, this die cushion can only be specifically used for producing aluminum profiles of this shape. When producing aluminum profiles of other shapes, the die cushion and the die need to be replaced. The versatility of the die cushion is poor, and the required number of special die cushions is large, which will increase the input cost of the die cushion. In addition, the wall thicknesses of different parts of aluminum profiles with different shapes are also different. To obtain a relatively balanced cooling rate, it is necessary to appropriately adjust the air output of each air hole. However, the existing die cushions do not have the function of adjusting the air output, and it is inconvenient to clean once the nitrogen channel is blocked. Therefore, it is necessary to design a new type of nitrogen-cooled extrusion pad die cushion. Summary of the Utility Model

[0005] In view of the above situation, the utility model provides a nitrogen-cooled extrusion pad die cushion to solve the technical problems existing in the die cushion in the above-mentioned prior art.

[0006] To achieve the above purposes, the utility model adopts the following technical solutions:

[0007] A nitrogen-cooled extrusion pad die pad, comprising a disc-shaped upper die pad and a lower die pad that are detachably and coaxially fitted and connected. Oval upper die holes and lower die holes are respectively provided at the central parts of the upper and lower die pads for discharging extruded aluminum profiles. An oval inner air channel and an outer air channel that are concentrically sleeved with the lower die hole are provided on the surface of one end of the lower die pad close to the upper die pad. A plurality of intermediate air channels for connecting the two air channels are annularly arranged at equal intervals between the inner and outer air channels. An air inlet channel communicating with the outer air channel is penetrated through the side wall of the lower die pad for externally connecting cooling nitrogen. A plurality of air outlet channels 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 plurality 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.

[0008] Further, the regulating valve assembly includes a valve block that can telescopically block or release the air outlet channel, 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 penetrated inside the track hole. The valve rod is a half-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 to the inner wall of the track hole through a circlip retaining ring, and a clamping ring groove is cooperatively provided on the outer side wall of the valve rod. The valve rod is rotatably and positionally connected to the upper die pad. A screwing wrench part (preferably a countersunk flat screwdriver groove or an internal hexagonal wrench groove) is provided at the outer end of the valve rod. By screwing the valve rod to rotate, the valve block can be driven to telescopically move through the screw pair cooperation of the threaded end of the valve rod, and further, the on-off of the nitrogen of the corresponding air outlet channel can be realized by controlling the valve block to abut against or separate from the side wall of the air outlet channel of the lower die pad.

[0009] Further, the inner air channel, the outer air channel, the intermediate air channel, and the air outlet channel 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-shaped air channel of the lower die pad. When the upper and lower die pads are fitted and connected together, the upper die pad cooperatively covers the open side of each groove-shaped air channel to form each complete nitrogen channel.

[0010] 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 circumferential 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.

[0011] Further, the end faces of the sides where the upper die pad and the lower die pad are connected are both smooth mirror surfaces. And 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.

[0012] Further, a butting groove matching the top end of the valve block is also arranged on the side wall of the air outlet channel of the lower die cushion. When the air outlet channel is closed to cut off the nitrogen gas outlet, it is used to cooperate with the butting top end for accommodating the valve block.

[0013] Further, an air joint is also threadedly connected to the air inlet end of the air inlet channel, which is used for externally connecting a cooling nitrogen gas plugging trachea. The externally connected cooling nitrogen gas can be supplied by a nitrogen gas cylinder or an external nitrogen gas station.

[0014] Further, a lifting ring connection hole is formed on the circumferential side wall of the lower die cushion, which is used for detachably screwing a lifting ring, facilitating the disassembly, replacement, hoisting and moving of the die cushion.

[0015] The 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 utility model, such as: half-thread long rod bolts, snap rings and positioning pins, as well as externally connected nitrogen gas source devices, air joints, hoisting and lifting devices, lifting rings, etc., all adopt the existing technologies in the art.

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

[0017] For the nitrogen gas cooling extrusion die cushion, an assembly and splicing method of detachable flange connection between the upper and lower die cushions is adopted. If the nitrogen gas channels are blocked, the air channels can be conveniently and completely dissected for dredging and cleaning; and a regulating valve assembly is respectively arranged corresponding to each air outlet channel, which can regulate and control the air outlet volume of each air outlet channel, facilitating reasonable adjustment of the air outlet volume of the cooling nitrogen gas according to the wall thickness of different parts of different aluminum profiles, and even completely cutting off the air outlet of some parts, so that each part of the extruded aluminum profile can obtain a relatively balanced cooling rate, improving the versatility of a single die cushion applicable to multiple groups of profiles and ensuring the extrusion forming quality of the aluminum profile. Description of the Drawings

[0018] Figure 1 It is a longitudinal sectional view structure diagram of the nitrogen gas cooling extrusion die cushion in the embodiment.

[0019] Figure 2 For Figure 1 The end face structure diagram of the lower die cushion along the A-A direction in

[0020] Figure 3 For Figure 1 The end face structure diagram of the upper die cushion along the B-B direction in

[0021] Figure 4 For Figure 1 The enlarged structure diagram of the regulating valve assembly at the C part in Detailed Embodiment

[0022] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are only partial embodiments of the present utility model, rather than all embodiments.

[0023] Embodiment

[0024] As Figures 1-4 shown, a nitrogen-cooled extrusion pad die pad includes a disc-shaped upper die pad 1 and a lower die pad 2 that are detachably and coaxially fitted and connected. Oval upper die holes 3 and lower die holes 4 are respectively provided at the central parts of the upper and lower die pads for discharging extruded aluminum profiles. An oval inner air channel 5 and an outer air channel 6 that are concentrically sleeved with the lower die hole are provided on the surface of the end of the lower die pad close to the upper die pad. A plurality of intermediate air channels 7 for communicating the two air channels are arranged in an equidistant annular manner between the inner and outer air channels. An air inlet channel 8 communicating with the outer air channel is penetrated through the side wall of the lower die pad for externally connecting cooling nitrogen. A plurality of air outlet channels 9 are arranged in an equidistant annular manner between the inner air channel 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 channel are annularly arranged around the lower die hole of the upper die pad.

[0025] The regulating valve assembly includes a valve block 10 that can telescopically block or release the air outlet channel, and a valve rod 11 for driving the telescopic movement of the valve block. A track hole 12 for the telescopic sliding of the valve block is correspondingly provided on the upper die pad. The valve block is slidably disposed inside the 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-threaded long rod bolt. The threaded end of the valve rod is threadedly connected to the valve block. An internal threaded hole 13 is cooperatively provided 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 retainer 14. A clamping ring groove 15 is cooperatively provided on the outer side wall of the valve rod. The valve rod is rotatably and positionally connected to the upper die pad. An internal hexagonal wrenching portion is provided at the outer end of the valve rod. By rotating the valve rod, the valve block can be driven to telescopically move through the thread pair cooperation of the threaded end of the valve rod, and then the nitrogen on-off of the corresponding air outlet channel can be realized by controlling the valve block to abut against or separate from the side wall of the air outlet channel of the lower die pad.

[0026] The inner air channel, the outer air channel, the intermediate air channel, and the air outlet channel 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 grooved air channel of the lower die pad. When the upper and lower die pads are fitted and connected together, the upper die pad cooperatively covers the open side of each grooved air channel to form each relatively closed and complete nitrogen channel.

[0027] A flange - type screw connection method is adopted between the upper die cushion and the lower die cushion. A plurality of flange screw holes 16 are annularly and evenly distributed on the circumferential edge of the upper die cushion, and flange screw grooves 17 corresponding to the flange screw holes are cooperatively formed on the end - face edge of the lower die cushion. The flange screw holes and the flange screw grooves are correspondingly screwed and fixed to each other through locking screws 23.

[0028] The end - face sides of the upper die cushion and the lower die cushion that are connected to each other are both smooth mirror - like surfaces. In addition to being connected by flange screws, there is also an effect of optical adhesive bonding between the connecting end - faces of the two die cushions. And three positioning pins 18 are annularly and evenly distributed on the connecting end - face of the upper die cushion, and positioning grooves 19 corresponding to the positioning pins are cooperatively formed on the connecting end - face of the lower die cushion.

[0029] On the side wall of the air outlet passage of the lower die cushion, there is also a butting groove 20 that matches the top end of the valve block. When the air outlet passage is closed to cut off the nitrogen gas outlet, it is used to cooperatively accommodate the butting top end of the valve block. When the top end of the valve block is completely butted in the butting groove, the corresponding air outlet passage is completely blocked, and correspondingly, the nitrogen gas outlet of this air outlet passage is completely cut off.

[0030] A gas joint 21 is also thread - connected to the gas inlet end of the gas inlet passage, which is used to externally connect the cooling nitrogen gas plug - in air pipe. The external nitrogen gas source device adopts the prior art, and the specific setting is not described in detail here.

[0031] A lifting ring connection hole 22 is formed on the circumferential side wall of the lower die cushion, which is used to detachably screw and connect a lifting ring (not shown in the figure), facilitating the disassembly, replacement, hoisting, and moving of the die cushion. The lifting ring and the hoisting and lifting equipment are both common hoisting and lifting devices in the prior art, and the specific setting is not described in detail here.

[0032] The technical solution of the present utility model is not limited to the limitations of the above - mentioned specific embodiments. Without departing from the scope and spirit of the illustrated 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 nitrogen cooled extrusion pad die pad, characterized in that: It comprises a disc-shaped upper die pad and a lower die pad which are detachably and coaxially fitted together. The central parts of the upper and lower die pads are respectively provided with an elliptical upper die hole and a lower die hole for extruding aluminum profiles; an elliptical inner air channel and an outer air channel which are concentrically sleeved with the lower die hole are provided on the surface of one end of the lower die pad close to the upper die pad, and 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 provided through the side wall of the lower die 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 die 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 die hole of the upper die pad.

2. A nitrogen cooled extrusion pad die pad according to claim 1, 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.

3. A nitrogen cooling extrusion pad die pad according to claim 2, characterized in that: The side wall of the air outlet of the lower die pad is also provided with an abutment groove matching the top end of the valve block.

4. A nitrogen cooling extrusion pad die pad according to claim 1, characterized in that: The inner air channel, outer air channel, middle air channel and outlet air channel are all open grooves opened on the end surface of the lower die pad, and the upper die pad can be detachably covered on the open side of each groove air channel of the lower die pad.

5. A nitrogen cooling extrusion pad die pad according to claim 1, 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. A nitrogen cooled extrusion pad die pad according to claim 5, characterized in that: The end faces on 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 provided with positioning grooves corresponding to the positioning pins.

7. A nitrogen cooled extrusion pad die pad according to claim 1, characterized in that: The air inlet end of the air inlet passage is also threadedly connected with an air joint.

8. A nitrogen cooled extrusion pad die pad according to claim 1, characterized in that: A lifting ring connection hole is provided on the circumferential side wall of the lower die pad for detachably screwing the lifting ring.

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