CN201271663Y

CN201271663Y - Hot extrusion mould

Info

Publication number: CN201271663Y
Application number: CNU2008200395805U
Authority: CN
Inventors: 徐建军; 漆兵恒
Original assignee: JIANGSHUN MOULDS CO Ltd JIANGYIN
Current assignee: JIANGSHUN MOULDS CO Ltd JIANGYIN
Priority date: 2008-09-01
Filing date: 2008-09-01
Publication date: 2009-07-15
Anticipated expiration: 2018-09-01

Abstract

The utility model relates to a hot extrusion die mainly used for the hot extrusion of large triangular tubes, which is formed by an upper die (1) and a lower die (2), wherein, six relief-holes (1.7) are uniformly distributed on the feed surface of the upper die (1), and the angle of the outer expanding hole (1.2) of the relief-hole (1.7) is not less than the angle of the inner expanding hole (1.2) thereof; the middle of the discharge surface of the upper die (1) adopts a large square head die core (1.1), and the periphery adopts a sunk bridge (1.5); and a welding chamber(2.1) and a triangular die cavity (2.2) are arranged in the middle of the lower die (2); the three angular positions of the triangular die cavity (2.2) are positioned in the corresponding positions of the upper die (1) right under the relief-holes (1.7); and corresponding to the three angular positions of the low die cavity (2.2), bridge positions (1.4) at the corresponding position right over the three angular positions of the low die cavity (2.2 ) adopt an inverted narrow-top and wide-bottom bridge. The die can effectively produce large triangular tube products on a relatively smaller extrusion machine, can prevent bridge crack and welding seam, and has long service life.

Description

Hot-extrusion mold

(1) technical field

The utility model relates to a kind of hot-extrusion mold.Be mainly used in the hot extrusion of large triangle tube.Belong to the mold machining technology field.

(2) background technology

Large triangle tube (Fig. 7) is mainly used in fields such as billboard, road sign.Its purposes is more and more wider, and market demand is also increasing.Along with the continuous development of society, the continuous variation of the market demand, market competition is more and more fiery, and at this moment a kind of high-quality, high-level large triangle tube are particularly in short supply on market, the phenomenon that supply falls short of demand occurred.Thereby brought huge commercial opportunities to die casting producer, a lot of producers all in action, but the product of working it out but is difficult to reach requirement of client, and self cost is high, mould and easily scrapping.

As everyone knows, big triangle tube hot-extrusion die belongs to generous head mould core mold, and the pressure of core rod is very big when extruding, especially is easy to split bridge at place, position, three angles, and this is to cause one of key reason that mould scraps.Secondly aspect section bar, do not allow to exist blemish such as weld seam (seam line), aberration.And the sectional area of this type of mould own is just bigger, and comparatively speaking, seam pressure just reduces relatively, and this is avoided weld seam to bring very big difficulty to mould.Be mould strength and life problems once more, all the time, generous head mould core mold is exactly the higher kind of subscription rate rate in the industry, and its reason is exactly problems such as the bridge location area is big, the bridge location span is long, the seam space is little.Solves this type of problem and preferably go up large-size extruder, but at present large-size extruder is not very universal that many section bars factory does not have the large-size extruder working condition.So largely still will try every possible means to solve above problem from Mould design.

(3) summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, a kind of in case crack arrest bridge is provided, avoids weld seam and the long hot-extrusion mold that can effectively produce the large triangle tubing on less relatively extruder of life-span.

The purpose of this utility model is achieved in that a kind of hot-extrusion mold, is formed by the upper die and lower die assembly, it is characterized in that:

Be evenly equipped with six tap holes on the charging face of described patrix, described tap hole adopt extend out orifice angle be not less than in the form of reaming angle, described patrix go out charge level in the middle of adopt generous head mould core, the peripheral mode that adopts heavy bridge,

Be provided with seam chamber and triangle die cavity in the middle of the described counterdie, the position, three angles of described triangle die cavity be placed on described patrix the corresponding position tap hole under,

Corresponding to the position, three angles of described counterdie die cavity, bridge location of corresponding position adopts the up-narrow and down-wide form of falling the bridge directly over it.

Compare with existing similar mould, the utlity model has following advantage:

1, the position, three angles of the triangle die cavity of counterdie be placed on patrix the corresponding position tap hole under, position, three angles be placed on fling below the tap hole, the length of six of patrix bridge locations can be reached an agreement like this, stressedly reaches even thereby make.

2, the bridge location on the patrix directly over three of the counterdie die cavity positions, angle adopts the up-narrow and down-wide form of falling the bridge, and being used for increasing patrix, to go out the bridge of charge level wide.Solved the problem that patrix splits bridge easily to a great extent by this two kinds of methods.

3, the charge level that goes out of patrix adopts heavy bridge form to strengthen the seam space, can increase seam pressure like this.

4, the patrix reaming is adopted the identical even interior reaming angle of inside and outside angle than the direct pressure that extends out the littler form of orifice angle and alleviate aluminium and flow patrix, relative, the pressure of aluminium stream has been transferred to the seam chamber of counterdie, so just in time increased the seam power of counterdie, alleviated last molding pressure again, thereby solved the difficult problem that heavy section is produced on little extruder.

5, take 10～15 degree (general 30～35 degree) for a short time falling in the bridge angle put, by heavy bridge with fall these two kinds of methods of bridge to alleviating the surface quality that the seam line has played effect clearly and improved section bar greatly.

(4) description of drawings

Fig. 1 is the Facad structure schematic diagram of the utility model mould.

Fig. 2 is the A-A cut-away view of Fig. 1.

Fig. 3 is patrix figure of the present utility model.

Fig. 4 is the B-B cut-away view of Fig. 3.

Fig. 5 is counterdie figure of the present utility model.

Fig. 6 is the C-C cut-away view of Fig. 5.

The large triangle tube sectional view that Fig. 7 relates to for the utility model.

Among the figure: patrix 1, counterdie 2; Generous head mould core 1.1, outer reaming 1.2, interior reaming 1.3, bridge location 1.4, heavy bridge 1.5, Technology for Heating Processing hole 1.6, tap hole 1.7, seam chamber 2.1, die cavity 2.2.

(5) specific embodiment

Referring to Fig. 1～2, the hot-extrusion mold that the utility model relates to is formed by patrix 1 and counterdie 2 usefulness pins and screw assembly.

Referring to Fig. 3～4, be evenly equipped with six tap holes 1.7 on the charging face of described patrix 1, described tap hole 1.7 adopt outer reaming 1.2 angles be not less than in the form of reaming 1.3 angles, described patrix 1 go out charge level in the middle of adopt generous head mould core 1.1, the peripheral mode of bridge 1.5 of sinking that adopts.

Referring to Fig. 5～6, be provided with seam chamber 2.1 and triangle die cavities 2.2 in the middle of the described counterdie 2, the position, three angles of described triangle die cavity 2.2 be placed on described patrix 1 corresponding position tap hole 1.7 under.

Corresponding to the position, three angles of described counterdie die cavity 2.2, bridge location 1.4 of corresponding position adopts the up-narrow and down-wide form of falling the bridge directly over it, as Fig. 3.

Claims

1, a kind of hot-extrusion mold is formed by patrix (1) and counterdie (2) assembly, it is characterized in that:

Be evenly equipped with six tap holes (1.7) on the charging face of described patrix (1), described tap hole (1.7) adopts outer reaming (1.2) angle to be not less than the form of interior reaming (1.3) angle, generous head mould core (1.1) is adopted in the charge level centre that goes out of described patrix (1), the peripheral mode that adopts heavy bridge (1.5)

Be provided with seam chamber (2.1) and triangle die cavity (2.2) in the middle of the described counterdie (2), the position, three angles of described triangle die cavity (2.2) be placed on described patrix (1) corresponding position tap hole (1.7) under,

Corresponding to the position, three angles of described counterdie die cavity (2.2), bridge location of corresponding position (1.4) adopts the up-narrow and down-wide form of falling the bridge directly over it.