Column and drain pipe integrated profile extrusion die

Abstract

The utility model discloses an upright post and drain pipe integrated profile extrusion die, which is characterized in that a central shunting hole is separated by a shunting sinking bridge subjected to sinking treatment to obtain a first shunting branch hole for supplying materials to a separating rib runner and a second shunting branch hole for supplying materials to a supporting rib runner, so that the material supply at a thick wall and a thin wall is effectively balanced; the two positions can be fully filled; meanwhile, a blocking rib is arranged at the position, close to the feeding end of the separation rib working belt, of the supporting rib runner, the flow speed of metal in the supporting rib runner can be effectively reduced, and therefore the flow speed at the thick wall position and the thin wall position is balanced; moreover, the problem that coarse grain layers on the surface of the thick wall are increased can be avoided through the short separation rib working belts, and the fatigue resistance and the salt spray corrosion resistance of the profile are guaranteed; due to the fact that the length of the separating rib working belt and the length of the supporting rib working belt are both short, the electric spark machining period of the die is shortened, damage to the working belts in the extrusion process is smaller, the die repairing difficulty is greatly reduced, the die repairing period is greatly shortened, and the die repairing cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy extrusion die technology, specifically to an integrated profile extrusion die for a column and a drainage pipe. Background Technology

[0002] The most important aspect of aluminum alloy profile extrusion molding is ensuring that the aluminum alloy flows out evenly after filling the mold. Generally, for a flow divider, this is achieved by adjusting the size of the flow divider orifice (adjusting the metal flow ratio) and the contact area between the working belt and the aluminum alloy (working belt length, adjusting the friction while maintaining wall thickness molding).

[0003] Typically, hollow profiles are designed with a "thicker on the outside and thinner on the inside" wall thickness distribution due to considerations of forming and structural strength. To ensure the qualified forming of such aluminum profiles with significant differences in inner and outer wall thickness, the area of ​​the flow diversion holes at the thicker wall is usually increased, while maintaining a certain working zone length (usually 1.5-2 times the wall thickness). This controls the metal flow rate at this point, ensuring consistency with the flow rate of the rest of the outer wall thickness, thus achieving aluminum profile shaping.

[0004] Please see Figure 1 Existing combined column and drainage pipe profiles typically involve extruding the column and drainage pipe profiles separately and then welding them together. This process is not only lengthy and inefficient, but also lacks ideal structural strength and durability. Therefore, the applicant hopes to achieve a one-piece molding process using extrusion. Figure 2 The column and drainage pipe shown are integrated profiles.

[0005] For profiles that integrate the column and drainage pipe, the wall thickness at the merging point becomes very thick due to the superposition of layers, and this area is located within the profile's internal ribs. Furthermore, the original thin-walled internal cavity structure of the original door column is still retained at the merging point. If the conventional mold design method described above is used, the following problems will arise:

[0006] 1. Because the inner cavity contains relatively long internal ribs and has a large difference in wall thickness, a flow diversion hole needs to be opened at the corresponding position of the upper mold to guide the flow. However, because the space here is small, the flow rate of metal drawn out by directly opening the flow diversion hole is not enough to fill all the wall thicknesses of the inner cavity.

[0007] 2. Since there are both thick-walled and thin-walled internal ribs in the inner cavity, the flow direction of aluminum alloy metal is to preferentially fill the thick-walled positions (because the wall thickness is thicker, the gap between the working zones is larger, and the resistance is smaller), which makes it impossible to effectively fill the thin-walled positions.

[0008] 3. To address the issue in point 2, it's typically necessary to lengthen the working zone in the thick-walled section (increasing friction) to reduce the flow velocity in this area, thus making the flow velocities more consistent between the thick and thin walls. However, an excessively long working zone leads to significant shear stress, resulting in an increased coarse grain layer on the thicker surface, which reduces the material's resistance to fatigue and salt spray corrosion. Furthermore, during mold processing, an excessively long working zone increases the number of EDM cycles. Additionally, if the working zone is damaged during extrusion, mold repair is difficult, generally requiring return to a mold processing center, which is not only costly but also time-consuming. Utility Model Content

[0009] In view of this, the present invention provides an integrated profile extrusion mold for columns and drainage pipes.

[0010] The technical solution is as follows:

[0011] The first aspect of this application relates to an integrated profile extrusion die for a column and a drainage pipe, comprising an upper die and a lower die adapted to the upper die. The lower die has a cavity penetrating its two end faces. The upper die has a core head adapted to the cavity. After the core head extends into the cavity, the gap between the two forms a die hole. The die hole includes a profile outer wall flow channel with an annular structure. This profile outer wall flow channel is divided by partition rib flow channels to form a column inner cavity and a drainage pipe inner cavity. The column inner cavity is divided by support rib flow channels with a cross structure to form four sub-cavities. The minimum width of the partition rib flow channels is greater than the maximum width of the profile outer wall flow channels and the support rib flow channels. The cavity wall of the cavity and the circumferential outer wall of the core head form the profile outer wall flow channel. The partition rib flow channels and the support rib flow channels are both formed inside the core head. A central flow divider hole is provided at the center of the end face of the upper mold away from the lower mold. This central flow divider hole is divided into a first flow divider branch hole for feeding material to the dividing rib flow channel and a second flow divider branch hole for feeding material to the support rib flow channel by a sunken flow divider bridge. Multiple outer flow divider holes for feeding material to the outer wall flow channel of the profile are provided on the end face of the upper mold away from the lower mold. Each outer flow divider hole is distributed around the central flow divider hole. The two side walls of the dividing rib flow channel are provided with dividing rib working strips of equal length near their discharge ends. The two side walls of the support rib flow channel are provided with support rib working strips of equal length near their discharge ends. The length of the dividing rib working strip is the same as the length of the support rib working strip. Obstruction ribs protrude on the two side walls of the support rib flow channel near the feed end of the corresponding dividing rib working strip.

[0012] Using the above-mentioned integrated column and drainage pipe profile extrusion die, the central flow channel is divided by a sunken flow bridge to create a first flow branch for feeding material to the dividing rib flow channel and a second flow branch for feeding material to the support rib flow channel. This effectively balances the material supply to the thick and thin walls, ensuring that both positions are fully filled. Simultaneously, the obstruction ribs near the feed end of the dividing rib working band in the support rib flow channel effectively reduce the metal flow velocity in the support rib flow channel, thus balancing the flow velocities in the thick and thin walls and making them relatively consistent. Furthermore, the shorter dividing rib working band avoids the problem of increased coarse grain layers on the surface of thick walls, ensuring the profile's resistance to fatigue and salt spray corrosion. Since the length of the dividing rib working band is the same as that of the support rib working band, the shorter working band length not only saves on the EDM cycle of the die but also reduces damage to the working band during extrusion, significantly reducing the difficulty, cycle, and cost of die repair.

[0013] In some embodiments, the obstruction rib is an arc-shaped structure protruding from the sidewall corresponding to the support rib channel, extending along the length of the support rib channel.

[0014] In some embodiments, the projection of the center position of the dividing rib flow channel onto the end face of the upper mold away from the lower mold is located in the first branch hole, and the projection of the center position of the supporting rib flow channel onto the end face of the upper mold away from the lower mold is located in the second branch hole.

[0015] In some embodiments, the distance between the bridge deck of the diversion bridge and the end face of the upper mold away from the lower mold is 15-60mm.

[0016] In some embodiments, the depth of the first and second branch holes is 20-60 mm.

[0017] In some embodiments, the cavity wall has a lower die working strip, the outer peripheral surface of the core head has an upper die working strip corresponding to the lower die working strip, the gap between the upper die working strip and the lower die working strip constitutes the flow channel of the profile outer wall, and the width of the upper die working strip is greater than the width of the lower die working strip.

[0018] In some embodiments, the outer side of the profile outer wall flow channel is provided with a plurality of cantilever flow channels, and the projection of each plurality of cantilever flow channels on the end face of the upper mold away from the lower mold is respectively located in the corresponding outer flow distribution hole. Attached Figure Description

[0019] Figure 1 A schematic diagram showing how a combined column and drainage pipe profile is obtained by welding the column profile and drainage pipe profile together.

[0020] Figure 2 This is a schematic diagram of a profile that integrates the column and drainage pipe.

[0021] Figure 3 A schematic diagram of the structure of an extrusion die for an integrated column and drainage pipe profile;

[0022] Figure 4 A cross-sectional view of the extrusion die for the integrated column and drainage pipe profile;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0025] like Figures 3-5 As shown, an integrated profile extrusion die for a column and drainage pipe mainly includes an upper die 2 and a lower die 1 adapted to the upper die 2. The lower die 1 has a cavity 11 extending through its two end faces, and the upper die 2 has a core head 21 adapted to the cavity 11. After the core head 21 extends into the cavity 11, the gap between the two forms a die hole A. In this embodiment, both the upper die 2 and the lower die 1 are cylindrical structures, and their diameters are equal.

[0026] Please see Figure 2 and Figure 3 The die hole A includes a ring-shaped profile outer wall flow channel A1, which is used to form the circumferential outer wall of the integrated column and drainage pipe profile. The profile outer wall flow channel A1 is divided by a partition rib flow channel A2 to form the inner cavity of the column and the inner cavity of the drainage pipe. The partition rib flow channel A2 is used to form the partition rib of the integrated column and drainage pipe profile, which divides the interior of the integrated column and drainage pipe profile into two inner cavities, one for the drainage pipe and the other for the column. The inner cavity of the column is divided into four sub-cavities by a cross-shaped support rib flow channel A3. The support rib flow channel A3 is used to form the support rib of the inner cavity of the integrated column and drainage pipe profile to improve the structural strength of the column section.

[0027] In this embodiment, the minimum width of the partition rib flow channel A2 is greater than the maximum width of the profile outer wall flow channel A1 and the support rib flow channel A3. It should be noted that the minimum width of the partition rib flow channel A2 does not exceed twice the maximum width of the support rib flow channel A3, because an excessive wall thickness difference will cause the flow velocity at the thick wall to be too fast.

[0028] Therefore, please see Figures 3-5In this integrated column and drainage pipe profile extrusion mold, the cavity wall of the cavity 11 and the circumferential outer wall of the core head 21 form the profile outer wall flow channel A1. The partition rib flow channel A2 and the support rib flow channel A3 are both opened inside the core head 21. A central flow-dividing hole 22 is opened at the center of the end face of the upper mold 2 away from the lower mold 1. Multiple outer flow-dividing holes 23 are opened on the end face of the upper mold 2 away from the lower mold 1 to supply material to the profile outer wall flow channel A1. Each outer flow-dividing hole 23 is distributed around the central flow-dividing hole 22. Furthermore, there are flow-dividing bridges 24 between adjacent flow-dividing holes 22. Each flow-dividing bridge 24 is connected to the corresponding upper mold pier.

[0029] The central diversion hole 22 is divided by the sunken diversion bridge 221 into a first diversion branch hole 222 for supplying material to the dividing rib flow channel A2 and a second diversion branch hole 223 for supplying material to the supporting rib flow channel A3, thereby effectively balancing the material supply to the thick-walled area (dividing rib flow channel A2) and the thin-walled area (supporting rib flow channel A3), so that both positions can be fully filled.

[0030] In this embodiment, the distance between the bridge surface of the diversion bridge 221 and the end face of the upper mold 2 away from the lower mold 1 is 15-60mm to ensure sufficient material supply. The preferred sinking depth of the diversion bridge 221 in this embodiment is 20mm.

[0031] Furthermore, the depth of the first diversion branch hole 222 and the second diversion branch hole 223 is 20-60mm to ensure sufficient material supply to the separating rib flow channel A2 and the supporting rib flow channel A3. In this embodiment, the depth of the first diversion branch hole 222 and the second diversion branch hole 223 is preferably 40mm.

[0032] Both sides of the partition rib flow channel A2 are provided with partition rib working strips 24 of equal length near their discharge ends. Both sides of the support rib flow channel A3 are provided with support rib working strips 25 of equal length near their discharge ends. The length of the partition rib working strip 24 is the same as the length of the support rib working strip 25. The shorter partition rib working strip 24 can avoid the problem of the increase of coarse grain layer on the surface of thick wall, ensuring the fatigue resistance and salt spray corrosion resistance of the profile. Since the length of the partition rib working strip 24 is the same as the length of the support rib working strip 25, the length of the working strip is relatively short, which not only saves the EDM machining cycle of the mold, but also reduces the damage of the working strip during the extrusion process, which greatly reduces the mold repair difficulty, mold repair cycle and mold repair cost.

[0033] In this embodiment, the length of the working strip 24 of the partition ribs on both sides of the partition rib flow channel A2 is 6mm and the spacing is 7mm, and the length of the working strip 25 of the support ribs on both sides of the support rib flow channel A3 is 6mm and the spacing is 3mm.

[0034] Furthermore, both sides of the support rib flow channel A3 have protruding obstruction ribs 26 that are close to the feed end of the corresponding partition rib working zone 24. This can effectively reduce the flow rate of metal in the support rib flow channel A3, thereby balancing the flow rates of the thick-walled section (partition rib flow channel A2) and the thin-walled section (support rib flow channel A3), making the flow rates of the thick-walled section and the thin-walled section relatively consistent.

[0035] Furthermore, the obstruction rib 26 is an arc-shaped structure protruding from the side wall of the support rib flow channel A3. It extends along the length of the support rib flow channel A3, and the outer edges of the two sides of the obstruction rib 26 smoothly transition with the side wall of the support rib flow channel A3. This can effectively reduce the wear of the obstruction rib 26, extend the service life of the obstruction rib 26, and thus reduce the frequency and cost of mold repair.

[0036] Please see Figure 3 The projection of the center position of the dividing rib flow channel A2 on the end face of the upper mold 2 away from the lower mold 1 is located in the first branch hole 222, and the projection of the center position of the supporting rib flow channel A3 on the end face of the upper mold 2 away from the lower mold 1 is located in the second branch hole 223, thereby enabling the material supply of the dividing rib flow channel A2 and the supporting rib flow channel A3 to be more sufficient.

[0037] Similarly, the outer side of the profile outer wall flow channel A1 is provided with several cantilever flow channels A4. The projection of each of the several cantilever flow channels A4 on the end face of the upper mold 2 away from the lower mold 1 is respectively located in the corresponding outer flow hole 23, so that the material supply to each cantilever flow channel A4 is more sufficient.

[0038] Furthermore, the cavity wall of the cavity 11 has a lower die working strip 111, and the outer peripheral surface of the core head 21 has an upper die working strip 211 corresponding to the lower die working strip 111. The gap between the upper die working strip 211 and the lower die working strip 111 forms the profile outer wall flow channel A1. Since the force in the extrusion direction of the upper die 2 is much greater than that of the lower die 1 during the extrusion process, it may cause the upper die working strip 211 to deform. Therefore, in this embodiment, the width of the upper die working strip 211 is greater than the width of the lower die working strip 111. This design can offset the shortening of the effective working strip caused by deformation.

[0039] Furthermore, a welding chamber 12 is formed in the recessed end face of the lower mold 1 near the upper mold 2, surrounding the cavity 11. The area of ​​the welding chamber 12 is as large as possible to ensure the welding quality.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A profile extrusion die integrating a column and a drainage pipe, comprising an upper die and a lower die adapted to the upper die, the lower die having a cavity penetrating its two end faces, the upper die having a core head adapted to the cavity, the gap between the core head and the cavity forming a die hole, the die hole including a profile outer wall flow channel with an annular structure, the profile outer wall flow channel being divided by partition rib flow channels to form a column inner cavity and a drainage pipe inner cavity, the column inner cavity being divided by support rib flow channels with a cross structure to form four sub-cavities, the minimum width of the partition rib flow channels being greater than the maximum width of the profile outer wall flow channels and the support rib flow channels, the cavity wall of the cavity and the circumferential outer wall of the core head forming the profile outer wall flow channel, the partition rib flow channels and the support rib flow channels being both opened inside the core head, characterized in that: A central flow-diverting hole is provided at the center of the end face of the upper mold away from the lower mold. This central flow-diverting hole is divided into a first flow-diverting branch hole for feeding material to the dividing rib flow channel and a second flow-diverting branch hole for feeding material to the supporting rib flow channel by a sunken flow-diverting bridge. Multiple outer flow-diverting holes for feeding material to the outer wall flow channel of the profile are provided on the end face of the upper mold away from the lower mold. Each outer flow-diverting hole is distributed around the central flow-diverting hole. The two side walls of the dividing rib flow channel are provided with dividing rib working strips of equal length near their discharge ends. The two side walls of the supporting rib flow channel are provided with supporting rib working strips of equal length near their discharge ends. The length of the dividing rib working strip is the same as the length of the supporting rib working strip. Obstruction ribs protrude on the two side walls of the supporting rib flow channel near the feed end of the corresponding dividing rib working strip.

2. The integrated profile extrusion die for column and drainage pipe as described in claim 1, characterized in that: The obstruction rib is an arc-shaped structure protruding from the side wall corresponding to the support rib flow channel, and it extends along the length direction of the support rib flow channel.

3. The integrated profile extrusion die for column and drainage pipe as described in claim 1, characterized in that: The projection of the center position of the dividing rib flow channel onto the end face of the upper mold away from the lower mold is located in the first branch hole, and the projection of the center position of the supporting rib flow channel onto the end face of the upper mold away from the lower mold is located in the second branch hole.

4. The integrated profile extrusion die for column and drainage pipe according to claim 1, characterized in that: The distance between the bridge deck of the diversion caisson and the end face of the upper formwork furthest from the lower formwork is 15-60mm.

5. The integrated profile extrusion die for column and drainage pipe according to claim 4, characterized in that: The depth of the first and second branch holes is 20-60mm.

6. The integrated profile extrusion die for column and drainage pipe according to claim 1, characterized in that: The cavity wall has a lower die working strip, and the outer peripheral surface of the core head has an upper die working strip corresponding to the lower die working strip. The gap between the upper die working strip and the lower die working strip forms the flow channel of the outer wall of the profile. The width of the upper die working strip is greater than the width of the lower die working strip.

7. The integrated profile extrusion die for column and drainage pipe according to claim 1, characterized in that: The outer side of the profile outer wall flow channel is provided with several cantilever flow channels, and the projection of each of the several cantilever flow channels on the end face of the upper mold away from the lower mold is respectively located in the corresponding outer flow distribution hole.

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