CN112854901A - Mold for casting pouring door handle, door handle manufacturing process and pouring door handle - Google Patents

Abstract

The invention discloses a die for casting a poured door handle, a door handle manufacturing process and the poured door handle, which comprises a movable die, a static die and a mounting seat for mounting the static die, wherein a first forming cavity is transversely arranged on the movable die, a second forming cavity is transversely arranged on the static die, the first forming cavity and the second forming cavity mutually enclose a door handle body forming cavity, a first groove is arranged on the movable die, a second groove is arranged on the static die, a first excess material forming cavity is mutually enclosed by the first groove and the second groove, a tapered hole with gradually increased diameter is vertically arranged on the movable die, a tapered flow guiding column with gradually increased diameter from top to bottom is fixedly arranged on the static die, a tapered pouring channel is formed between the tapered hole and the flow guiding column, the tapered pouring channel comprises a feeding port and a discharging port, and the discharging port of the tapered pouring channel is communicated with the door handle body forming cavity through a pouring flow channel, compared with the prior art, the metal solution has good fluidity, is easy to fill a casting mold and has high qualification rate of finished products.

Description

Mold for casting pouring door handle, door handle manufacturing process and pouring door handle

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of moulds, in particular to a mould for casting a poured door handle, a door handle manufacturing process and a poured door handle.

[ background of the invention ]

The problems in the existing casting production process are that in the casting process, the temperature of a mould is often too low relative to the temperature of alloy liquid, so that the fluidity of the alloy liquid in a forming cavity is poor, the mould is not easy to fill, and meanwhile, the cast part is also poor in quality, does not meet the specified parameter standard of a workpiece and the like due to the uneven temperature in the mould cavity, and is scrapped; with the rapid rise of raw materials and higher cost, how to improve the product quality, avoid the defects of castings and reduce the rejection rate of the castings becomes a problem to be solved urgently.

[ summary of the invention ]

In order to solve the problems, the invention provides a mold for casting a cast door handle, a door handle manufacturing process and the cast door handle.

In order to achieve the purpose, the invention provides the following technical scheme.

A die for casting a door handle comprises a movable die, a static die and a mounting seat for mounting the static die, wherein the movable die and the static die are arranged oppositely, a first molding cavity is transversely arranged on the movable die, a second molding cavity corresponding to the first molding cavity is transversely arranged on the static die, the first molding cavity and the second molding cavity mutually enclose a door handle body molding cavity, a plurality of first grooves which are positioned at two sides of the first molding cavity and communicated with the first molding cavity are arranged on the movable die, a plurality of second grooves which are positioned at two sides of the second molding cavity and communicated with the second molding cavity are arranged on the static die, the positions of the first grooves and the second grooves are in one-to-one correspondence, the first grooves and the second grooves mutually enclose a first excess material molding cavity, and a tapered hole with the diameter gradually increased from top to bottom is arranged on the movable die, the door handle body forming die is characterized in that a tapered drainage column with the diameter gradually increasing from top to bottom is fixedly arranged on the static die, the tapered hole is sleeved on the periphery of the drainage column during die assembly to enable a tapered pouring channel to be formed between the tapered hole and the drainage column, the tapered pouring channel comprises a feeding hole and a discharging hole with the caliber larger than that of the feeding hole, the feeding hole is formed in the upper end of the movable die, the discharging hole is formed in the lower end of the movable die or in the upper end of the static die or in the position of the movable die and the static die, and the discharging hole of the tapered pouring channel is communicated with the door handle body forming cavity through a pouring runner.

Further defined as preferred: the first molding cavity comprises a first transverse handle molding cavity and a holding groove communicated with the first transverse handle molding cavity, the second forming cavity comprises a second transverse handle forming cavity, a convex core module is arranged beside the second transverse handle forming cavity, the first transverse handle forming cavity and the second transverse handle forming cavity mutually enclose a handle cavity, a module cavity is formed between the accommodating tank and the convex core module, the convex core module comprises a central column fixedly arranged on the static die and a plurality of convex blocks, the convex blocks are uniformly distributed around the central column at intervals so that a clearance groove is formed between every two adjacent convex blocks, an annular cavity communicated with the clearance groove is formed between the central column and the protruding block, and an annular groove communicated with the annular cavity is formed at the joint of the central column and the static die in a sunken mode.

Further defined as preferred: the outer peripheral surface of the central column is symmetrically provided with extending wings protruding towards two sides.

Further defined as preferred: and two side walls of the two opposite clearance grooves are inwards concave to form semicircular grooves corresponding to the positions of the two side walls.

Further defined as preferred: the pouring runner is divided into a main runner and an auxiliary runner, a first runner and a second runner are arranged on the movable die, a third runner corresponding to the first runner and a fourth runner corresponding to the second runner are arranged on the static die, the main runner is formed by mutually surrounding the first runner and the third runner, and the auxiliary runner is formed by mutually surrounding the second runner and the fourth runner.

Further defined as preferred: one port of the main runner and one port of the auxiliary runner are respectively communicated with the discharge port, and the other port of the main runner and the other port of the auxiliary runner are respectively communicated with the module cavity.

Further defined as preferred: the end opening of the main flow channel communicated with the module cavity is trumpet-shaped.

Further defined as preferred: the lower end of the movable die is provided with a boss protruding downwards, the upper end of the static die is provided with a cavity which is formed by downward concave and can be matched with the boss, the first runner, the second runner and the accommodating groove are arranged on the boss, the third runner, the fourth runner and the convex core module are arranged in the cavity, the highest points of the first runner and the second runner are higher than the first transverse handle forming cavity, the highest points of the third runner and the fourth runner are lower than the second transverse handle forming cavity, and the movable die is matched with the cavity of the static die through the boss.

Further defined as preferred: the movable die is provided with a first notch, the first grooves on the same side are communicated with each other through the first notch, the static die is provided with a second notch, the second grooves on the same side are communicated with each other through the second notch, and the first notch and the second notch enclose a connecting channel during die assembly.

Further defined as preferred: the movable mold is further provided with a third groove communicated with the first molding cavity, the stationary mold is further provided with a fourth groove communicated with the second molding cavity, the third groove corresponds to the fourth groove in position, and the third groove and the fourth groove enclose a second excess material molding cavity.

Further defined as preferred: the first excess material forming cavity and the second excess material forming cavity are distributed around the handle cavity.

The process for manufacturing the door handle by using the die for casting and pouring the door handle comprises the following steps,

step S1: manufacturing a die, wherein the die comprises the movable die and the static die;

step S2: heating a metal material to 400-450 ℃ by a smelting furnace to melt;

step S3: enabling the liquefied metal material solution to sequentially flow through a feed inlet, a conical pouring channel, a discharge outlet, a pouring runner, a door handle body forming cavity and a first excess material forming cavity of the die by injection by using a die casting machine until the feed inlet is filled; a tapered cylinder is formed through the tapered pouring channel, a first connecting piece is formed through the pouring runner, a door handle body is formed through a door handle body forming cavity, and a second connecting piece is formed through the first excess material forming cavity;

step S4: after cooling and demolding, taking out the poured door handle, wherein the poured door handle comprises the door handle body, the tapered cylinder, the first connecting piece and the second connecting piece, and the door handle body is connected with the tapered cylinder through the first connecting piece and the second connecting piece respectively; and performing excess material treatment on the poured door handle, wherein the excess material treatment comprises removing the tapered cylinder, the first connecting piece and the second connecting piece, and finally obtaining the door handle body.

Further defined as preferred: in step S2, the furnace is heated to a temperature of 440 ℃.

Further defined as preferred: the metal material is a zinc ingot, an aluminum ingot or a zinc-aluminum alloy.

Further defined as preferred: the door handle body is provided with a handle part and a driving part used for being linked with the lock body, the first connecting piece comprises a first connecting strip and a second connecting strip, the end part of the conical cylinder is connected with the side end of the driving part through the first connecting strip and the second connecting strip respectively, the second connecting piece comprises a first connecting block and a second connecting block, the first connecting block is provided with a plurality of first connecting blocks, the first connecting blocks are arranged on two sides of the handle part respectively and are located on the same side, the first connecting blocks are connected through a connecting bridge, and the end, far away from the driving part, of the handle part is further connected with the second connecting block.

The door handle body is provided with a handle part and a driving part for linkage with a lock body, a hollow conical cylinder is arranged beside the handle part, the end part of the conical cylinder is connected with the side end of the driving part through a first connecting piece, and a plurality of second connecting pieces are connected with the side end of the driving part.

Further defined as preferred: the first connecting piece comprises a first connecting strip and a second connecting strip, the end part of the conical cylinder is connected with the side end of the driving part through the first connecting strip and the second connecting strip respectively, the first connecting strip mainly comprises an arc-shaped part and a transition part, and the cross-sectional area of the transition part faces to the extension direction of the driving part and is made to be gradually increased in a small mode, so that the transition part is horn-shaped.

Further defined as preferred: the second connecting piece is including first connecting block and second connecting block, first connecting block is provided with a plurality ofly, and a plurality ofly first connecting block branch is arranged in the both sides of holding portion are located same one side connect through the connecting bridge between the first connecting block, the one end that the drive division was kept away from to the portion of holding still is connected with the second connecting block.

Further defined as preferred: the hollow-out type hollow driving device is characterized in that an open square groove is formed in the hollow-out portion of the driving portion, a hollow cylinder extending outwards to the outside of the opening of the square groove is arranged in the square groove, the hollow cylinder comprises a cylindrical body portion located in the square groove and an exposed portion exposed out of the opening of the square groove, the periphery of the cylindrical body portion is connected with the side wall of the square groove through a plurality of reinforcing ribs respectively, and a notch is formed in the exposed portion in a penetrating mode along the radial direction of the exposed portion.

Further defined as preferred: the number of the reinforcing ribs is four, and every two reinforcing ribs are oppositely arranged and distributed in a cross shape.

Compared with the prior art, the invention has the following beneficial effects:

1. the liquefied metal solution sequentially flows through the door handle body forming cavity and the first excess material forming cavity through the conical pouring channel, the metal solution which flows through the door handle body forming cavity firstly can preheat the door handle body forming cavity, the metal solution which enters the door handle body forming cavity before can be extruded into the first excess material forming cavity to be filled with the metal solution after being continuously poured into the door handle body forming cavity, and finally the door handle body forming cavity is filled with the metal solution; the door handle forming cavity has the preheating effect, so that the cavity is uniformly heated, and meanwhile, impurities in the door handle body forming cavity can be mixed with the metal solution and discharged into the first excess material forming cavity in the pouring process.

2. The pouring runner is divided into a main runner and an auxiliary runner, so that the door handle body forming cavity can be quickly filled with the metal solution, and the production efficiency is improved; wherein, the port of the main runner communicated with the module cavity is trumpet-shaped, which can play a role of slowing down the flow rate of the solution so as to fill the casting mold.

3. The invention also provides a process for manufacturing the door handle by using the die for casting and pouring the door handle, which comprises the following steps: step S1: manufacturing a die, wherein the die comprises the movable die and the static die; step S2: heating the metal material to 400-450 ℃ through a smelting furnace to melt, and performing step S3: enabling the liquefied metal material solution to sequentially flow through a feed inlet, a conical pouring channel, a discharge outlet, a pouring runner, a door handle body forming cavity and a first excess material forming cavity of the die by injection by using a die casting machine until the feed inlet is filled; step S4: and after cooling and demolding, taking out the poured door handle, and performing excess material treatment on the poured door handle to finally obtain the door handle body.

[ description of the drawings ]

Fig. 1 is a structural diagram of the inventive mold.

Fig. 2 is an exploded view of the inventive die.

Fig. 3 is one of the cross-sectional views of the inventive mold.

Fig. 4 is an enlarged view at a of fig. 3.

Fig. 5 is an enlarged view at B of fig. 3.

Fig. 6 is a second cross-sectional view of the inventive mold.

Fig. 7 is an enlarged view at C of fig. 6.

Fig. 8 is a third sectional view of the inventive mold.

Fig. 9 is an enlarged view at D of fig. 8.

FIG. 10 is a structural view of the movable mold.

Fig. 11 is a structural view of the stationary mold.

Fig. 12 is an enlarged view of fig. 11 at E.

FIG. 13 is a schematic view of the door handle cast.

Fig. 14 is a structural view of the door handle body.

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 12, a mold for casting a poured doorknob comprises a movable mold 1, a stationary mold 2 and a mounting seat 3 for mounting the stationary mold 2, wherein the movable mold 1 and the stationary mold 2 are arranged oppositely, a first molding cavity 11 is transversely arranged on the movable mold 1, a second molding cavity 21 corresponding to the first molding cavity 11 is transversely arranged on the stationary mold 2, the first molding cavity 11 and the second molding cavity 21 enclose a doorknob body molding cavity 10, a plurality of first grooves 12 positioned on two sides of the first molding cavity 11 and communicated with the first molding cavity 11 are arranged on the movable mold 1, a plurality of second grooves 22 positioned on two sides of the second molding cavity 21 and communicated with the second molding cavity 21 are arranged on the stationary mold 2, and the positions of the first grooves 12 correspond to the positions of the second grooves 22 one by one, the first groove 12 and the second groove 22 mutually enclose a first excess material forming cavity 20, a tapered hole 13 with the diameter gradually increasing from top to bottom is vertically arranged on the movable die 1, the static mould 2 is fixedly provided with a conical drainage column 23 with the diameter gradually increasing from top to bottom, the conical hole 13 is sleeved on the periphery of the drainage column 23 during mould closing so that a conical pouring channel 30 is formed between the conical hole 13 and the drainage column 23, the conical pouring channel 30 comprises a feed inlet 301 and a discharge outlet 302 with a caliber larger than that of the feed inlet 301, the feed inlet 301 is arranged at the upper end of the movable mold 1, the discharge outlet 302 is arranged at the lower end of the movable mold 1 or at the upper end of the static mold 2 or at a channel formed when the movable mold 1 and the static mold 2 are combined, the discharge hole 302 of the conical pouring channel 30 is communicated with the door handle body molding cavity 10 through a pouring runner 4; during casting, the liquefied metal solution sequentially flows through the door handle body forming cavity 10 and the first surplus material forming cavity 20 through the conical pouring channel 30, the metal solution which firstly flows through the door handle body forming cavity 10 can preheat the door handle body forming cavity 10, the metal solution which previously enters the door handle body forming cavity 10 is extruded into the first surplus material forming cavity 20 to be filled with the metal solution continuously poured into the door handle body forming cavity 10, and finally the door handle body forming cavity 10 is filled with the metal solution; the door handle forming cavity has the preheating effect, so that the cavity is heated uniformly, and meanwhile, impurities in the door handle body forming cavity 10 and metal solution can be mixed together and discharged into the first excess material forming cavity 20 in the pouring process.

Specifically, as shown in fig. 2 to 6 and fig. 10 to 12, the first molding cavity 11 includes a first transverse handle molding cavity 111 and a receiving groove 112 communicating with the first transverse handle molding cavity 111, the receiving groove 112 is filled with a metal solution to form a driving portion 602 of the door handle body 6, the second molding cavity 21 includes a second transverse handle molding cavity 211, a convex core module 5 is disposed beside the second transverse handle molding cavity 211, the first transverse handle molding cavity 111 and the second transverse handle molding cavity 211 mutually enclose a handle cavity, the handle cavity is filled with a metal solution to form a handle portion 601 of the door handle body 6, a module cavity is formed between the receiving groove 112 and the convex core module 5, the convex core module 5 includes a central column 51 and a plurality of convex blocks 52 fixedly disposed on the stationary mold 2, and the plurality of convex blocks 52 are uniformly spaced around the central column 51, so that two adjacent convex blocks are disposed at a uniform distance around the central column 51 A gap groove 53 is formed between the blocks 52, the gap groove 53 is filled with metal solution to form a reinforcing rib 6026 for pouring the door handle, thereby increasing the rigidity and strength of the door handle body 6, an annular cavity 54 communicating with the clearance groove 53 is formed between the center post 51 and the boss 52, the annular cavity 54 is filled with metal solution to form a hollow cylinder 6022, the joint of the central column 51 and the static die 2 is sunken to form an annular groove 55 communicated with the annular cavity 54, the annular groove 55 is filled with metal solution to form an exposed part 6024, the outer peripheral surface of the central column 51 is symmetrically provided with protruding wings 511 protruding towards two sides, two opposite side walls of the clearance grooves 53 are both inwards recessed to form semi-circular grooves 531 corresponding to the positions, the semi-circular grooves 531 are filled with a metal solution to form reinforcing bar columns on the reinforcing bars 6026.

Specifically, the pouring runner 4 is divided into a main runner 41 and an auxiliary runner 42, a first runner 411 and a second runner 421 are arranged on the movable mold 1, a third runner 412 corresponding to the first runner 411 and a fourth runner 422 corresponding to the second runner 421 are arranged on the stationary mold 2, the main runner 41 is defined by the first runner 411 and the third runner 412, the auxiliary runner 42 is defined by the second runner 421 and the fourth runner 422, one port of the main runner 41 and one port of the auxiliary runner 42 are respectively communicated with the discharge port 302, and the other port of the main runner 41 and the other port of the auxiliary runner 42 are respectively communicated with the mold set cavity; the pouring runner 4 is divided into a main runner 41 and an auxiliary runner 42, so that the door handle body forming cavity 10 can be quickly filled with metal solution, and the production efficiency is improved; the end of the main flow channel 41, which is communicated with the module cavity, is trumpet-shaped, and can play a role in slowing down the flow rate of the solution so as to fill the casting mold.

Specifically, as shown in fig. 10 to 12, a boss 14 formed to protrude downward is provided at the lower end of the movable mold 1, a cavity 24 formed to be recessed downward and capable of fitting with the boss 14 is provided at the upper end of the stationary mold 2, the first flow passage 411, the second flow passage 421 and the receiving groove 112 are all provided on the boss 14, the third flow passage 412, the fourth flow passage 422 and the core-protruding mold 5 are provided in the cavity 24, the highest points of the first flow passage 411 and the second flow passage 421 are higher than the first transverse handle-forming cavity 111, the highest points of the third flow passage 412 and the fourth flow passage 422 are lower than the second transverse-forming cavity 211, the movable mold 1 fits with the cavity 24 of the stationary mold 2 through the boss 14, the bottom of the cavity 24 is lower than the handle cavity so that a height difference is formed therebetween, and the flow direction of the metal solution flows from the lower position to the higher position, so that the metal solution fills the mould cavity.

Specifically, as shown in fig. 11, a first notch 15 is formed on the movable mold 1, the first grooves 12 located on the same side are communicated with each other through the first notch 15, a second notch 25 is formed on the stationary mold 2, the second grooves 22 located on the same side are communicated with each other through the second notch 25, and the first notch 15 and the second notch 25 enclose a connecting channel 100 when the molds are closed; the connecting passage 100 can increase the fluidity of the metal solution in the mold cavity, and facilitate the molding of the mold cavity.

Specifically, the movable die 1 is further provided with a third groove 16 communicated with the first molding cavity 11, the stationary die 2 is further provided with a fourth groove 26 communicated with the second molding cavity 21, the position of the third groove 16 corresponds to the position of the fourth groove 26, the third groove 16 and the fourth groove 26 define a second excess molding cavity 40, the first excess molding cavity 20 and the second excess molding cavity 40 are distributed around the handle cavity, and the flowability of the metal solution in the die cavity is further increased, so that the casting of the die cavity is facilitated.

The invention also provides a process for manufacturing the door handle by using the die for casting and pouring the door handle, which comprises the following steps,

step S1: manufacturing a die, wherein the die comprises the movable die 1 and the static die 2;

step S2: heating a metal material to 400-450 ℃ by a smelting furnace to melt, specifically heating the metal material to 440 ℃, wherein the metal material is a zinc ingot, an aluminum ingot or a zinc-aluminum alloy.

Step S3: enabling the liquefied metal material solution to sequentially flow through a feed inlet 301, a conical pouring channel 30, a discharge outlet 302, a pouring runner 4, a door handle body forming cavity 10 and a first excess material forming cavity 20 of the die by injection by using a die casting machine until the feed inlet 301 is filled; a tapered cylinder 61 is formed through the tapered pouring channel 30, a first connecting piece 62 is formed through the pouring runner 4, a door handle body 6 is formed through the door handle body molding cavity 10, and a second connecting piece 63 is formed through the first surplus molding cavity 20;

step S4: after cooling and demolding, taking out the cast door handle, wherein the cast door handle comprises the door handle body 6, the tapered cylinder 61, the first connecting piece 62 and the second connecting piece 63, and the door handle body 6 is connected with the tapered cylinder 61 through the first connecting piece 62 and the second connecting piece 63 respectively; and (3) performing excess material treatment on the poured door handle, wherein the excess material treatment comprises removing the tapered cylinder 61, the first connecting piece 62 and the second connecting piece 63, and finally obtaining the door handle body 6.

The door handle body 6 is provided with a handle part 601 and a driving part 602 for linking with a lock body, the first connecting piece 62 comprises a first connecting strip 621 and a second connecting strip 622, the end part of the conical cylinder 61 is connected with the side end of the driving part 602 through the first connecting strip 621 and the second connecting strip 622 respectively, the second connecting piece 63 comprises a first connecting block 631 and a second connecting block 632, the first connecting blocks 631 are provided with a plurality of blocks, a plurality of first connecting blocks 631 are arranged on two sides of the handle part 601, the first connecting blocks 631 located on the same side are connected through a connecting bridge 630, and the end of the handle part 601 far away from the driving part 602 is also connected with the second connecting block 632; specifically, the first connecting bar 621 is formed by filling the main flow channel 41 with the metal solution, the second connecting bar 622 is formed by filling the sub flow channel 42 with the metal solution, the first connecting block 631 is formed by filling the first surplus molding chamber 20 with the metal solution, and the second connecting block 632 is formed by filling the second surplus molding chamber 40 with the metal solution.

As shown in fig. 13 and 14, the invention further provides a cast door handle cast by the mold, which includes a door handle body 6, the door handle body 6 has a handle portion 601 and a driving portion 602 for linking with a lock body, a hollow conical cylinder 61 is disposed beside the handle portion 601, an end of the conical cylinder 61 is connected to a side end of the driving portion 602 through a first connecting member 62, a plurality of second connecting members 63 are connected to a side end of the driving portion 602, the first connecting member 62 includes a first connecting bar 621 and a second connecting bar 622, ends of the conical cylinder 61 are connected to a side end of the driving portion 602 through the first connecting bar 621 and the second connecting bar 622, respectively, the first connecting bar 621 mainly includes an arc-shaped portion 6211 and a transition portion 6212, a cross-sectional area of the transition portion 6212 gradually increases from small to small toward an extending direction of the driving portion 602 so that the transition portion 6212 is horn-shaped, the second connecting piece 63 is including first connecting block 631 and second connecting block 632, first connecting block 631 is provided with a plurality ofly, and is a plurality of first connecting block 631 is arranged in branch the both sides of handle portion 601 are located same one side connect through connecting bridge 630 between the first connecting block 631, handle portion 601 keeps away from that one end of drive portion 602 still is connected with second connecting block 632. The pouring door handle is formed by casting a plurality of cavities in a die, the formed first connecting piece 62 and the second connecting piece 63 can be removed as excess materials, and finally a door handle body 6 product can be obtained.

Specifically, the inside of the driving portion 602 is hollowed to form a square groove 6021 with an opening, a hollow cylinder 6022 extending outward to the outside of the opening is arranged in the square groove 6021, the hollow cylinder 6022 comprises a cylindrical body portion 6023 positioned in the square groove 6021 and an exposed portion 6024 exposed out of the opening of the square groove 6021, the periphery of the cylindrical body portion 6023 is connected with the side wall of the square groove 6021 through a plurality of reinforcing ribs 6026 respectively, the exposed portion 6024 is penetrated along the radial direction to form a notch 6025, the number of the reinforcing ribs 6026 is four, the two reinforcing ribs 6026 are arranged oppositely and distributed in a cross shape, and the inside of the driving portion 602 is hollowed, so that the material consumption can be saved, the cost can be reduced, and the market competitiveness can be improved; and the ribs 6026 can enhance the stability of the cylindrical body portion 6023 secured to the square groove 6021.

Claims (20)

1. The utility model provides a mould of casting pouring door handle, is including movable mould (1), quiet mould (2) and be used for installing mount pad (3) of quiet mould (2), movable mould (1) and quiet mould (2) set up relatively, its characterized in that: a first molding cavity (11) is transversely arranged on the movable die (1), a second molding cavity (21) corresponding to the first molding cavity (11) in position is transversely arranged on the static die (2), the first molding cavity (11) and the second molding cavity (21) mutually enclose a door handle body molding cavity (10), a plurality of first grooves (12) which are positioned at two sides of the first molding cavity (11) and communicated with the first molding cavity (11) are arranged on the movable die (1), a plurality of second grooves (22) which are positioned at two sides of the second molding cavity (21) and communicated with the second molding cavity (21) are arranged on the static die (2), the positions of the first grooves (12) and the positions of the second grooves (22) are in one-to-one correspondence, and the first grooves (12) and the second grooves (22) mutually enclose a first excess material molding cavity (20), the door handle is characterized in that a conical hole (13) with gradually-increased opening diameter is vertically arranged on the movable die (1), a tapered flow column (23) with gradually-increased diameter from top to bottom and in a conical shape is fixedly arranged on the static die (2), the conical hole (13) is sleeved on the periphery of the tapered flow column (23) to enable the tapered hole (13) and the tapered flow column (23) to form a tapered pouring channel (30), the tapered pouring channel (30) comprises a feeding hole (301) and a discharging hole (302) with larger caliber than the feeding hole (301), the feeding hole (301) is arranged at the upper end of the movable die (1), the discharging hole (302) is arranged at the lower end of the movable die (1) or at the upper end of the static die (2) or at the position of the movable die (1) and the passage formed during die assembly of the static die (2), and the discharging hole (302) of the tapered pouring channel (30) is communicated with the door handle body through a pouring flow passage (4) The molding cavities (10) are communicated.

2. The mold for casting a door handle according to claim 1, wherein: the first forming cavity (11) comprises a first transverse handle forming cavity (111) and a containing groove (112) communicated with the first transverse handle forming cavity (111), the second forming cavity (21) comprises a second transverse handle forming cavity (211), a convex core module (5) is arranged beside the second transverse handle forming cavity (211), the first transverse handle forming cavity (111) and the second transverse handle forming cavity (211) mutually enclose a handle cavity, a module cavity is formed between the containing groove (112) and the convex core module (5), the convex core module (5) comprises a central column (51) and a plurality of convex blocks (52) which are fixedly arranged on the static die (2), and the plurality of convex blocks (52) are uniformly distributed around the center of the central column (51) at intervals so that a clearance groove (53) is formed between two adjacent convex blocks (52), an annular cavity (54) communicated with the clearance groove (53) is formed between the central column (51) and the protruding block (52), and an annular groove (55) communicated with the annular cavity (54) is formed at the joint of the central column (51) and the static die (2) in a sunken mode.

3. The mold for casting a door handle according to claim 2, wherein: the outer peripheral surface of the central column (51) is symmetrically provided with protruding wings (511) protruding towards two sides.

4. The mold for casting a door handle according to claim 2, wherein: and semicircular grooves (531) corresponding to the positions of the two side walls of the two opposite gap grooves (53) are formed in an inward concave mode.

5. The mold for casting a door handle according to claim 2, wherein: the pouring runner (4) is divided into a main runner (41) and an auxiliary runner (42), a first runner (411) and a second runner (421) are arranged on the movable die (1), a third runner (412) corresponding to the first runner (411) and a fourth runner (422) opposite to the second runner (421) are arranged on the static die (2), the main runner (41) is formed by mutually surrounding the first runner (411) and the third runner (412), and the auxiliary runner (42) is formed by mutually surrounding the second runner (421) and the fourth runner (422).

6. The mold for casting a door handle according to claim 5, wherein: one port of the main flow passage (41) and one port of the auxiliary flow passage (42) are respectively communicated with the discharge hole (302), and the other port of the main flow passage (41) and the other port of the auxiliary flow passage (42) are respectively communicated with the module cavity.

7. The mold for casting a door handle according to claim 6, wherein: the end opening of the main flow channel (41) communicated with the module cavity is trumpet-shaped.

8. The mold for casting a door handle according to claim 5, wherein: the lower extreme of movable mould (1) is provided with boss (14) that downward protrusion formed, the upper end of quiet mould (2) is provided with cavity (24) that the undercut formed and can with boss (14) looks adaptation, first runner (411), second runner (421) and holding tank (112) all set up on boss (14), third runner (412), fourth runner (422) and protruding core module (5) set up in cavity (24), the peak of first runner (411) and second runner (421) is higher than first horizontal handle shaping chamber (111), third runner (412) peak and fourth runner (422) are lower than horizontal handle shaping chamber (211) of second, movable mould (1) pass through boss (14) with the cavity (24) looks adaptation of quiet mould (2).

9. The mold for casting a door handle according to claim 2, wherein: the movable die is characterized in that a first notch (15) is formed in the movable die (1), the first grooves (12) located on the same side are communicated through the first notch (15), a second notch (25) is formed in the fixed die (2), the second grooves (22) located on the same side are communicated through the second notch (25), and the first notch (15) and the second notch (25) enclose a connecting channel (100) during die assembly.

10. The mold for casting a door handle according to claim 9, wherein: the movable die (1) is further provided with a third groove (16) communicated with the first molding cavity (11), the stationary die (2) is further provided with a fourth groove (26) communicated with the second molding cavity (21), the position of the third groove (16) corresponds to the position of the fourth groove (26), and the third groove (16) and the fourth groove (26) form a second excess material molding cavity (40) in a surrounding mode.

11. The mold for casting a door handle according to claim 10, wherein: the first surplus material forming cavity (20) and the second surplus material forming cavity (40) are distributed around the handle cavity.

12. A process for manufacturing a door handle using the mold for casting a door handle according to any one of claims 1 to 11, wherein: comprises the following steps of (a) carrying out,

step S1: manufacturing a die, wherein the die comprises the movable die (1) and the static die (2);

step S2: heating a metal material to 400-450 ℃ by a smelting furnace to melt;

step S3: enabling the liquefied metal material solution to sequentially flow through a feed inlet (301), a conical pouring channel (30), a discharge outlet (302), a pouring runner (4), a door handle body forming cavity (10) and a first excess material forming cavity (20) of the die by injection by using a die casting machine until the feed inlet (301) is filled; a tapered cylinder (61) is formed through the tapered pouring channel (30), a first connecting piece (62) is formed through the pouring runner (4), a door handle body (6) is formed through the door handle body molding cavity (10), and a second connecting piece (63) is formed through the first excess material molding cavity (20);

step S4: after cooling and demolding, taking out the cast door handle, wherein the cast door handle comprises the door handle body (6), the tapered cylinder (61), the first connecting piece (62) and the second connecting piece (63), and the door handle body (6) is connected with the tapered cylinder (61) through the first connecting piece (62) and the second connecting piece (63) respectively; and (3) performing excess material treatment on the poured door handle, wherein the excess material treatment comprises removing the tapered cylinder (61), the first connecting piece (62) and the second connecting piece (63), and finally obtaining the door handle body (6).

13. The process for manufacturing a door handle according to claim 12, wherein: in step S2, the furnace is heated to a temperature of 440 ℃.

14. The process for manufacturing a door handle according to claim 12, wherein: the metal material is a zinc ingot, an aluminum ingot or a zinc-aluminum alloy.

15. The process of manufacturing a door handle according to claim 12, wherein: door handle body (6) have handle portion (601) and be used for with drive division (602) of lock body linkage, first connecting piece (62) are including first connecting strip (621) and second connecting strip (622), the tip of taper cylinder (61) passes through respectively first connecting strip (621), second connecting strip (622) with the side of drive division (602) is connected, second connecting piece (63) are including first connecting block (631) and second connecting block (632), first connecting block (631) are provided with a plurality ofly, and a plurality ofly first connecting block (631) are arranged in the both sides of handle portion (601), are located same side connect through connecting bridge (630) between first connecting block (631), the handle portion (601) is kept away from that one end of drive division (602) still is connected with second connecting block (632).

16. A cast door handle cast with the mold according to any one of claims 1 to 11, comprising a door handle body (6), characterized in that: the door handle body (6) is provided with a handle part (601) and a driving part (602) used for being linked with a lock body, a hollow conical cylinder (61) is arranged beside the handle part (601), the end part of the conical cylinder (61) is connected with the side end of the driving part (602) through a first connecting piece (62), and a plurality of second connecting pieces (63) are connected with the side end of the driving part (602).

17. The poured door handle according to claim 16, wherein: the first connecting piece (62) comprises a first connecting strip (621) and a second connecting strip (622), the end of the conical cylinder (61) is connected with the side end of the driving portion (602) through the first connecting strip (621) and the second connecting strip (622) respectively, the first connecting strip (621) mainly comprises an arc-shaped portion (6211) and a transition portion (6212), and the cross-sectional area of the transition portion (6212) is gradually increased towards the extending direction of the driving portion (602) to enable the transition portion (6212) to be horn-shaped.

18. The poured door handle according to claim 17, wherein: second connecting piece (63) are including first connecting block (631) and second connecting block (632), first connecting block (631) are provided with a plurality ofly, and are a plurality of first connecting block (631) branch is arranged in the both sides of handling portion (601), lie in same one side connect through connecting bridge (630) between first connecting block (631), it keeps away from to handle portion (601) that one end of drive division (602) still is connected with second connecting block (632).

19. The poured door handle according to claim 16, wherein: the driving part (602) is internally hollowed to form a square groove (6021) with an opening, a hollow cylinder (6022) extending outwards to the outside of the opening is arranged in the square groove (6021), the hollow cylinder (6022) comprises a cylindrical body part (6023) positioned in the square groove (6021) and an exposed part (6024) exposed out of the opening of the square groove (6021), the periphery of the cylindrical body part (6023) is respectively connected with the side wall of the square groove (6021) through a plurality of reinforcing ribs (6026), and a notch (6025) is formed in the exposed part (6024) in a penetrating manner along the radial direction of the cylindrical body part.

20. The poured door handle according to claim 19, wherein: the number of the reinforcing ribs (6026) is four, and every two reinforcing ribs are arranged oppositely and distributed in a cross shape.

Images