阅读说明：本技术 一种高强度耐腐蚀铅坠挤压成型装置和成型工艺 (High-strength corrosion-resistant lead weight extrusion forming device and forming process ) 是由 陈伟雄 于 2021-07-06 设计创作，主要内容包括：本发明公开一种高强度耐腐蚀铅坠挤压成型装置,其特征在于：包括对铅坠进行成型的成型模具,和向成型模具内浇铸铅液的喂料机构；所述成型模具包括动模、定模和辅助件。将辅助件和成型于辅助件上的多个铅坠一次性取出,提高脱模效率,保证脱模的铅坠不会相互碰撞而产生瑕疵,同时免去敲击模具脱模的麻烦,降低工作人员劳动强度,同时使用喂料机构可以减少人工浇铸的过程,提高铅坠浇铸成型的自动化程度。本发明还提出一种高强度耐腐蚀铅坠的成型工艺。(The invention discloses a high-strength corrosion-resistant lead weight extrusion forming device, which is characterized in that: comprises a forming die for forming the lead weight and a feeding mechanism for casting lead liquid into the forming die; the forming die comprises a moving die, a fixed die and an auxiliary piece. With a plurality of plummets of auxiliary member and shaping on the auxiliary member once only take out, improve drawing of patterns efficiency, the plummets of guaranteeing the drawing of patterns can not collide each other and produce the flaw, remove the trouble of strikeing the mould drawing of patterns simultaneously from, reduce staff intensity of labour, use feed mechanism can reduce the process of artifical casting simultaneously, improve the degree of automation of plummets casting shaping. The invention also provides a forming process of the high-strength corrosion-resistant lead weight.)

1. The utility model provides a corrosion-resistant plummet extrusion device of high strength which characterized in that: comprises a forming die for forming the lead weight and a feeding mechanism for casting lead liquid into the forming die; the forming die comprises a movable die, a fixed die and an auxiliary part;

a plurality of first forming grooves arranged at intervals along the length direction of the movable mold, a plurality of first casting openings in one-to-one correspondence with the first forming grooves and a first placing groove for placing an auxiliary part in an extending mode along the length direction of the movable mold are formed in the side face of the movable mold;

a plurality of second forming grooves which are in one-to-one correspondence with the first forming grooves, a plurality of second casting openings which are in one-to-one correspondence with the first casting openings and a second placing groove for placing the auxiliary part in an extending mode along the length direction of the fixed die are formed in the side face, opposite to the movable die, of the fixed die;

each first forming groove and the corresponding second forming groove form a forming cavity for forming the lead weight, each first casting opening and the corresponding second casting opening form a liquid inlet hole for introducing lead liquid, and the first placing groove and the second placing groove form a containing groove for containing an auxiliary piece;

the auxiliary pieces are placed in the accommodating grooves and positioned in the forming cavities, and one ends of the auxiliary pieces extend to the outer sides of the movable die and the fixed die; the liquid inlet hole is communicated with the molding cavity, and the accommodating groove is communicated with the molding cavity.

2. The extrusion molding apparatus of a high strength corrosion resistant lead weight according to claim 1, wherein: the auxiliary part comprises a handheld part positioned on the outer sides of the movable die and the fixed die and a plurality of connecting parts which correspond to the forming cavities one by one; the connecting parts are sequentially connected to form a forming part, and the handheld part is connected to one end of the forming part; the connecting part comprises a hanging ring, a connecting rod and a forming rod; the adjacent connecting rods are connected with one end of the forming rod, the hanging ring is connected with the other end of the forming rod, and the forming rod is positioned in the forming cavity;

the first placing groove comprises a plurality of first annular grooves which correspond to the hanging rings one to one and are used for placing the hanging rings, the second placing groove comprises a plurality of second annular grooves which correspond to the first annular grooves one to one, and the first annular grooves and the corresponding second annular grooves form hanging ring grooves for accommodating the hanging rings;

the forming cavity forms a first projection surface on the horizontal plane, the ring hanging groove forms a second projection surface on the horizontal plane, and the second projection surface and the first projection surface have a partial overlapping area.

3. The extrusion molding apparatus of a high strength corrosion resistant lead weight according to claim 1, wherein: the upper surface of the movable die is provided with a first casting opening, and the upper surface of the fixed die is provided with a second casting opening; the first casting opening and the second casting opening form a casting groove, and the casting groove is communicated with the liquid inlet holes.

4. The extrusion molding apparatus of a high strength corrosion resistant lead weight according to claim 1, wherein: the feeding mechanism comprises a lead liquid accommodating barrel for accommodating lead liquid, the lead liquid accommodating barrel is positioned above the forming die, a liquid outlet pipeline is arranged at the lower end of the lead liquid accommodating barrel, and a plurality of liquid outlet nozzles which correspond to the liquid inlet holes one to one are arranged on the liquid outlet pipeline.

5. The extrusion molding apparatus of a high strength corrosion resistant lead weight according to claim 1, wherein: the fixed die is characterized by further comprising a fixed mounting plate for mounting the fixed die and a moving driving device for driving the movable die to move towards the fixed die for die assembly.

6. A forming process of a high-strength corrosion-resistant lead weight is characterized in that the forming die and the feeding mechanism of claim 1 are applied, and the forming process comprises the following steps:

(1) the movable die and the fixed die are matched, and the auxiliary piece is placed in the accommodating groove;

(2) smelting a lead raw material into lead liquid;

(3) pouring molten lead into the assembled forming mold to fill each forming cavity with the molten lead and coat the part of the auxiliary piece in the forming cavity;

(4) and cooling and solidifying the molten lead to form lead weights, splitting the movable die and the fixed die, and taking down the lead weights in the forming cavities through one end of the auxiliary piece, which is positioned at the outer sides of the movable die and the fixed die.

7. The forming process of the high-strength corrosion-resistant lead weight according to claim 6, wherein the forming process comprises the following steps: before the die is closed, a release agent is coated in the first forming groove of the movable die and the second forming groove of the fixed die.

8. The forming process of the high-strength corrosion-resistant lead weight according to claim 6, wherein the forming process comprises the following steps: and after the lead liquid is cooled and solidified to form a lead weight, removing redundant solid lead in the casting groove before the movable die and the fixed die are disassembled.

Technical Field

The invention relates to the field of fishing gear casting, in particular to a high-strength corrosion-resistant lead weight extrusion forming device and a forming process.

Background

The lead weight is an indispensable auxiliary fishing tool in the fishing group, and has the function of balancing the fishing group by the weight of a fisher throwing the bait into a front fishing point when throwing the fishing rod for long distance and the weight of the fishing point after throwing the bait into water; when a fish bites the hook, the fishhook can pierce the fish lip to make the fish catch the hook by the weight of the lead weight.

Along with more and more people will fish as one of amusement and leisure projects, the demand of plummet is also more and more, and the method of traditional production plummet is artifical casting, and is inefficient, and the drawing of patterns of plummet after the casting produces the vibration through the mould and makes plummet follow mould internal drop, makes the plummet that drops produce sunken and crack in striking ground or striking each other easily like this, leads to the quality of product to differ, is unfavorable for guaranteeing the quality of product.

In view of the above, the applicant has made an intensive study on the above-mentioned defects in the prior art, and has made this invention.

Disclosure of Invention

The invention aims to provide a high-strength corrosion-resistant lead weight extrusion forming device, which aims to solve the problems that the manual casting efficiency is low, and the lead weight is easy to dent and crack due to the falling of the lead weight through a vibrating die, so that the product quality is not ensured.

The invention also aims to provide a forming process of the high-strength corrosion-resistant lead weight, and the lead weight produced by the process can be taken out from a forming cavity at one time without vibrating a mould, so that the quality of the lead weight is better ensured while demoulding is quick and convenient.

In order to achieve the above purpose, the solution of the invention is:

a high-strength corrosion-resistant lead weight extrusion forming device comprises a forming die for forming a lead weight and a feeding mechanism for casting lead liquid into the forming die; the forming die comprises a movable die, a fixed die and an auxiliary part;

a plurality of first forming grooves arranged at intervals along the length direction of the movable mold, a plurality of first casting openings in one-to-one correspondence with the first forming grooves and a first placing groove for placing an auxiliary part in an extending mode along the length direction of the movable mold are formed in the side face of the movable mold;

a plurality of second forming grooves which are in one-to-one correspondence with the first forming grooves, a plurality of second casting openings which are in one-to-one correspondence with the first casting openings and a second placing groove for placing the auxiliary part in an extending mode along the length direction of the fixed die are formed in the side face, opposite to the movable die, of the fixed die;

each first forming groove and the corresponding second forming groove form a forming cavity for forming the lead weight, each first casting opening and the corresponding second casting opening form a liquid inlet hole for introducing lead liquid, and the first placing groove and the second placing groove form a containing groove for containing an auxiliary piece;

the auxiliary pieces are placed in the accommodating grooves and positioned in the forming cavities, and one ends of the auxiliary pieces extend to the outer sides of the movable die and the fixed die; the liquid inlet hole is communicated with the molding cavity, and the accommodating groove is communicated with the molding cavity.

Furthermore, the auxiliary part comprises a handheld part positioned at the outer sides of the movable die and the fixed die and a plurality of connecting parts which correspond to the forming cavities one by one; the connecting parts are sequentially connected to form a forming part, and the handheld part is connected to one end of the forming part; the connecting part comprises a hanging ring, a connecting rod and a forming rod; the adjacent connecting rods are connected with one end of the forming rod, the hanging ring is connected with the other end of the forming rod, and the forming rod is positioned in the forming cavity;

the first placing groove comprises a plurality of first annular grooves which correspond to the hanging rings one to one and are used for placing the hanging rings, the second placing groove comprises a plurality of second annular grooves which correspond to the first annular grooves one to one, and the first annular grooves and the corresponding second annular grooves form hanging ring grooves for accommodating the hanging rings;

the forming cavity forms a first projection surface on the horizontal plane, the ring hanging groove forms a second projection surface on the horizontal plane, and the second projection surface and the first projection surface have a partial overlapping area.

Further, a first casting opening is formed in the upper surface of the movable mold, and a second casting opening is formed in the upper surface of the fixed mold; the first casting opening and the second casting opening form a casting groove, and the casting groove is communicated with the liquid inlet holes.

Further, the feeding mechanism comprises a lead liquid accommodating barrel for accommodating lead liquid, the lead liquid accommodating barrel is positioned above the forming die, a liquid outlet pipeline is arranged at the lower end of the lead liquid accommodating barrel, and a plurality of liquid outlet nozzles which correspond to the liquid inlet holes one to one are arranged on the liquid outlet pipeline.

The movable die further comprises a fixed mounting plate for mounting the fixed die and a movable driving device for driving the movable die to move towards the fixed die for die assembly.

A forming process of a high-strength corrosion-resistant lead weight comprises the following steps:

(1) the movable die and the fixed die are matched, and the auxiliary piece is placed in the accommodating groove;

(2) smelting a lead raw material into lead liquid;

(3) pouring molten lead into the assembled forming mold to fill each forming cavity with the molten lead and coat the part of the auxiliary piece in the forming cavity;

(4) and cooling and solidifying the molten lead to form lead weights, splitting the movable die and the fixed die, and taking down the lead weights in the forming cavities through one end of the auxiliary piece, which is positioned at the outer sides of the movable die and the fixed die.

Further, before mold closing, a mold release agent is coated in the first molding groove of the movable mold and the second molding groove of the fixed mold.

Further, after the lead liquid is cooled and solidified to form a lead weight, before the movable die and the fixed die are disassembled, redundant solid lead in the casting groove is removed.

After adopting the structure, the high-strength corrosion-resistant lead weight extrusion forming device has at least the following beneficial effects:

1. the auxiliary part is placed in the second placing groove of the fixed die, so that after the movable die and the fixed die are assembled, the auxiliary part is located in the accommodating groove formed by the first placing groove and the second placing groove, the feeding mechanism casts lead liquid into each liquid inlet hole, and each forming cavity is filled with the lead liquid and wraps the part of the auxiliary part in the forming cavity. Make the lead liquid cooling solidify and form the plumbous back that weighs down, the independent plumbous of auxiliary member in with a plurality of shaping chambeies weighs down and connects, behind split movable mould and cover half, handheld auxiliary member is in the one end of movable mould and cover half, and move outwards, once only take out auxiliary member and a plurality of plumbous of shaping on the auxiliary member, improve drawing of patterns efficiency, the plumbous of guaranteeing the drawing of patterns weighs down can not collide each other and produce the flaw, the trouble of knocking the mould drawing of patterns is removed from simultaneously, reduce staff intensity of labour, use feed mechanism can reduce the process of manual casting simultaneously, improve the plumbous fashioned degree of automation of casting that weighs down.

2. The auxiliary piece comprises a handheld part and a connecting part, and the connecting part comprises a hanging ring, a connecting rod and a forming rod; after molten lead is cast into the forming cavity, the forming rod is positioned in the forming cavity, and a part of the outer circumference of the hanging ring is also positioned in the forming cavity; lead liquid parcel shaping pole, and the partly of link, solidify the back in the lead liquid cooling, the shaping pole is in the inside that the lead weighs down, the link is direct to be fixed in one of the lead weighs down, connect through adjacent connecting rod between a plurality of lead weighs down, solidify the back in the lead liquid cooling, split movable mould and cover half, hold handheld portion, once only take out a plurality of lead weighs down, can obtain a plurality of lead weights that have the link, need not to process out the lead and weigh down the back, pass through the process that screw-thread fit connects on the lead weighs down with the link again, greatly improve the machining efficiency who takes the lead weight of link, save the equipment of unnecessary process and processing screw hole, reduce the cost of processing area link lead weight. The invention also provides a forming process of the high-strength corrosion-resistant lead weight, and the lead weight produced by the process can be taken out from the forming cavity at one time without vibrating a die, so that the quality of the lead weight is better ensured while the demoulding is quick and convenient.

Drawings

FIG. 1 is a schematic front view of an extrusion molding apparatus for a high-strength corrosion-resistant lead weight according to the present invention;

FIG. 2 is a schematic side view of a moving mold according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a moving mold and a stationary mold according to an embodiment of the present invention;

FIG. 4 is a schematic view of a lead weight formed on an auxiliary member according to an embodiment;

FIG. 5 is a schematic structural diagram of an auxiliary member according to a first embodiment;

FIG. 6 is a schematic perspective view of a molding die;

FIG. 7 is a schematic perspective view of a suspension ring and a lead weight formed according to an embodiment;

FIG. 8 is a schematic side view of a movable mold according to a second embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an auxiliary member according to a second embodiment of the present invention;

fig. 10 is a schematic structural view of a lead sinker connected to a first connecting section according to a second embodiment of the present invention;

FIG. 11 is a schematic side view of a movable mold according to a third embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an auxiliary member according to a third embodiment of the present invention;

fig. 13 is a schematic structural diagram of a lead sinker connected to the second connecting segment according to a third embodiment of the present invention.

In the figure: the lead liquid casting device comprises a forming die 1, a feeding mechanism 2, a moving die 3, a fixed die 4, an auxiliary part 5, a first forming groove 31, a first casting opening 32, a first placing groove 33, a forming cavity 61, a liquid inlet hole 62, a handheld part 51, a connecting part 52, a hanging ring 521, a connecting rod 522, a first annular groove 331, a casting groove 63, a lead liquid accommodating barrel 21, a liquid outlet nozzle 22, a fixed mounting plate 71, a movable driving device 72, a lead weight 8, a first connecting section 53, a first bending section 531, a second connecting section 54, a first rod section 541, a second rod section 542, a third rod section 543, a second bending section 544 and a third bending section 545.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The first embodiment is as follows:

as shown in fig. 1 to 7, the extrusion molding device for a high-strength corrosion-resistant lead weight 8 according to the present invention comprises a molding die 1 for molding the lead weight 8, and a feeding mechanism 2 for casting lead liquid into the molding die 1; the forming die 1 comprises a movable die 3, a fixed die 4 and an auxiliary part 5;

the side surface of the movable mold 3 is provided with a plurality of first molding grooves 31 arranged at intervals along the length direction of the movable mold 3, a plurality of first pouring gates 32 corresponding to the first molding grooves 31 one by one, and a first placing groove 33 extending along the length direction of the movable mold 3 for placing the auxiliary 5;

a plurality of second forming grooves corresponding to the first forming grooves 31 one by one, a plurality of second pouring openings corresponding to the first pouring openings 32 one by one, and a second placing groove for placing the auxiliary member 5 in an extending manner along the length direction of the fixed mold 4 are formed on the side surface of the fixed mold 4 opposite to the movable mold 3;

each first forming groove 31 and the corresponding second forming groove form a forming cavity 61 for forming the lead weight 8, each first casting opening 32 and the corresponding second casting opening form a liquid inlet hole 62 for introducing lead liquid, and the first placing groove 33 and the second placing groove form a containing groove for containing the auxiliary piece 5;

the auxiliary piece 5 is placed in the containing groove and positioned in each molding cavity 61, and one end of the auxiliary piece 5 extends to the outer sides of the movable mold 3 and the fixed mold 4; the liquid inlet hole 62 is communicated with the molding cavity 61, and the containing groove is communicated with the molding cavity 61.

In this way, the auxiliary member 5 is placed in the second placing groove of the fixed mold 4, after the movable mold 3 and the fixed mold 4 are closed, the auxiliary member 5 is placed in the containing groove formed by the first placing groove 33 and the second placing groove, the feeding mechanism 2 casts the lead liquid into each liquid inlet hole 62, and each molding cavity 61 is filled with the lead liquid and wraps the part of the auxiliary member 5 in the molding cavity 61. Make the lead liquid cooling solidify and form the plumbous 8 backs of weighing down, the independent plumbous 8 that weighs down in a plurality of shaping chambeies 61 of auxiliary member 5 is connected, behind split movable mould 3 and cover half 4, handheld auxiliary member 5 is in the one end of movable mould 3 and cover half 4, and move outwards, weigh down a plurality of plumbous 8 of weighing down 8 with auxiliary member 5 and shaping on auxiliary member 5 once only and take out, improve drawing of patterns efficiency, guarantee that the plumbous 8 of drawing of patterns can not collide with each other and produce the flaw, remove the trouble of knocking the mould drawing of patterns simultaneously from, reduce staff intensity of labour, use feed mechanism 2 can reduce the process of manual casting simultaneously, improve the plumbous 8 casting fashioned degree of automation of casting.

Preferably, the auxiliary 5 includes a hand-held portion 51 outside the movable mold 3 and the fixed mold 4, and a plurality of connecting portions 52 in one-to-one correspondence with the respective molding cavities 61; the connecting parts 52 are sequentially connected to form a molding part, and the handheld part 51 is connected to one end of the molding part; the connecting part 52 comprises a hanging ring 521, a connecting rod 522 and a forming rod; the adjacent connecting rods 522 are connected with one end of the forming rod, the hanging ring 521 is connected with the other end of the forming rod, and the forming rod is positioned in the forming cavity 61;

the first placing groove 33 comprises a plurality of first annular grooves 331 which correspond to the hanging rings 521 one by one and are used for placing the hanging rings 521, the second placing groove comprises a plurality of second annular grooves which correspond to the first annular grooves 331 one by one, and the first annular grooves 331 and the corresponding second annular grooves form hanging ring grooves for accommodating the hanging rings 521;

the forming cavity 61 forms a first projection plane on a horizontal plane, the ring hanging groove forms a second projection plane on the horizontal plane, and the second projection plane and the first projection plane have a partial overlapping area.

The auxiliary part 5 comprises a hand-held part 51 and a connecting part 52, wherein the connecting part 52 comprises a hanging ring 521, a connecting rod 522 and a forming rod; after the molten lead is cast into the molding cavity 61, the molding rod is positioned in the molding cavity 61, and a part of the outer circumference of the hanging ring is also positioned in the molding cavity 61; lead liquid parcel shaping pole, and the partly of link 521, solidify the back in the lead liquid cooling, the shaping pole is in the inside that lead weighs down 8, link 521 is direct to be fixed in one of lead weighs down 8 and serves, connect through adjacent connecting rod 522 between a plurality of lead weighs down 8, solidify the back in the lead liquid cooling, split movable mould 3 and cover half 4, hold handheld portion 51, once only take out a plurality of lead weighs down 8, can obtain a plurality of lead that have the link and weigh down 8, need not to process out lead and weigh down 8 after, pass through the process of screw-thread fit connection on lead weighs down 8 with the link again, greatly improve the machining efficiency who takes the lead of link to weigh down 8, save the equipment of unnecessary process and processing screw hole, reduce the cost that processing takes the lead of link to weigh down 8. Specifically, the hand-held portion 51 and the molding portion are integrally molded, and the suspension loop, the connecting rod 522 and the molding rod are integrally molded; the efficiency of manufacturing the auxiliary part 5 is greatly improved; after the lead weight 8 is formed, the auxiliary part 5 is taken out, and the connecting rod 522 is cut off, so that the independent lead weight 8 with the hanging ring can be obtained; the cut connecting rod 522 can be recycled, and materials are saved.

Preferably, after standing for a period of time, the lead liquid in the molding cavity 61 is replenished with the lead liquid from the casting groove 63 in the process of solidification so as to reach the saturation of the lead plummet 8 in the molding process, the upper surface of the movable mold 3 forms a first casting opening, and the upper surface of the fixed mold 4 forms a second casting opening; the first and second casting openings form a casting trough 63, and the casting trough 63 is in communication with each liquid inlet hole 62. After the molten lead is completely solidified, before the movable mold 3 and the fixed mold 4 are disassembled, redundant solid lead in the casting groove 63 is removed and recovered, so that mold separation is facilitated, and redundant lead is recycled.

Preferably, in order to improve the efficiency of inputting the lead liquid into each forming cavity 61, the feeding mechanism 2 includes a lead liquid accommodating barrel 21 for accommodating the lead liquid, the lead liquid accommodating barrel 21 is located above the forming mold 1, a liquid outlet pipe is arranged at the lower end of the lead liquid accommodating barrel 21, and a plurality of liquid outlet nozzles 22 corresponding to the liquid inlet holes 62 are arranged on the liquid outlet pipe. The liquid outlets 22 simultaneously input lead liquid into the molding cavity 61, so that the casting efficiency is improved; specifically, the liquid outlet 22 may further be provided with a flow solenoid valve for controlling the output of the lead liquid. Preferably, the fixed mold clamping device further comprises a fixed mounting plate 71 for mounting the fixed mold 4 and a moving driving device 72 for driving the movable mold 3 to move the mold clamping towards the fixed mold 4. The fixed die 4 is arranged on the fixed mounting plate 71, and the movable driving device 72 drives the movable die 3 to move towards the fixed die 4 at the same time, so that the fixed die 4 and the movable die 3 are combined, and the accuracy and the automation degree of die assembly are improved; specifically, the movement driving device 72 is a cylinder drive.

Example two:

the structure of the second embodiment is substantially the same as that of the first embodiment, and the only difference is that: referring to fig. 8 to 10, the auxiliary 5 includes a first holding section at an outer side of the movable mold 3 and the fixed mold 4, and a plurality of first connecting sections 53 in one-to-one correspondence with the respective molding cavities 61; the plurality of first connecting sections 53 are sequentially connected to form a first molding section, and the first handheld section is connected to one end of the first molding section; the first connecting section 53 comprises a forming rod and a first bending section 531, one end of the first bending section 531 is connected with one end of the forming rod, the other end of the first bending section 531 is connected with the adjacent first bending section 531, the adjacent first bending section 531 bends towards the opposite direction, and the forming rod is positioned in the forming cavity 61; after the molten lead is cast into the forming cavity 61, because the forming rod is positioned in the forming cavity 61, the molten lead is wrapped by the forming rod in the process of gradual solidification, because the adjacent first bending sections 531 are connected together, and the first bending sections 531 are connected together, the lead plummets 8 formed in the forming cavities 61 can be taken out together during demoulding, after the lead plummets are taken out, the adjacent first bending sections 531 are cut off from the connecting parts of the adjacent first bending sections 531 to separate the adjacent first bending sections 531, then the separated ends of the first bending sections 531 are bent and connected to the surfaces of the lead plummets 8, so that the first bending sections 531 form a closed-loop annular structure to form hanging rings, the efficiency of demoulding is improved, meanwhile, the efficiency of processing the hanging rings on the lead plummets 8 is improved, specifically, the first handheld sections and the first forming sections are integrally formed, a plurality of first connecting sections 53 are integrally formed, the separated ends of the first bending sections 531 are connected with the surfaces of the lead plummets 8 by welding, first bending segment 531 is the arc bending segment, in order to avoid interconnect's first bending segment to warp at the forming process or take out the in-process, leads to the arc part of buckling to straighten and be unfavorable for buckling the one end of first bending segment separation and be connected to the surface of plummet, and the auxiliary member is made for iron, improves the structural strength of auxiliary member.

Example three:

the structure of the third embodiment is substantially the same as that of the first embodiment, and the only difference is that: referring to fig. 11 to 13, the auxiliary member 5 includes a plurality of second connecting sections 54 corresponding to the forming cavities 61 one by one, and the plurality of second connecting sections 54 are connected end to end in sequence; the second connecting section 54 comprises a first pole section 541, a second pole section 542 and a third pole section 543 arranged in this order from top to bottom; a second bend segment 544 is connected to one end of the first rod segment 541 and one end of the second rod segment 542, and a third bend segment 545 is connected to the other end of the second rod segment 542 and one end of the third rod segment 543;

the forming cavity 61 forms a third plane of projection in the horizontal plane, the projections of the first, second and third rod segments 541, 542 and 543 in the horizontal plane all overlap with the third plane of projection, the second bend segment 544 is located on one side of the outer side of the forming cavity 61, and the third bend segment 545 is located on the other side of the outer side of the forming cavity 61.

After molten lead is cast into the forming cavity 61, the molten lead wraps the first rod section 541, the second rod section 542 and the third rod section 543 which are positioned in the forming cavity 61, so that after the lead weight 8 is formed, the second bending section 544 and the third bending section 545 form hanging rings 521 at two ends of the lead weight 8, the subsequent threading of the lead weight 8 is facilitated, the hanging rings 521 at one end do not need to be found, the plurality of second connecting sections 54 are sequentially connected end to end, each lead weight 8 in the plurality of forming cavities 61 can be taken out once during demolding, the demolding efficiency is improved, redundant connecting parts on the lead weight 8 are removed, the lead weight 8 with hanging rings at two ends can be obtained, the steps of installing hanging rings are reduced, the demolding efficiency is improved, the production efficiency is improved, specifically, the second bending section 544 and the third bending section 545 are both arc-shaped bending sections, the second holding section extending towards the outer sides of the movable mold 3 and the fixed mold 4 is further included, and the second holding section is held by hand during demolding to take out the plurality of lead weights 8, avoid scalding.

A forming process of a high-strength corrosion-resistant lead weight 8 comprises the following steps:

(1) the movable mold 3 and the fixed mold 4 are assembled, and the auxiliary piece 5 is placed in the accommodating groove;

(2) smelting a lead raw material into lead liquid;

(3) pouring molten lead into the assembled forming mold 1, so that the molten lead is filled in each forming cavity 61 and covers the part of the auxiliary piece 5 in the forming cavity 61;

(4) and cooling and solidifying the molten lead to form lead weights 8, splitting the movable die 3 and the fixed die 4, and taking down the lead weights 8 in the forming cavities 61 through one ends of the auxiliary pieces 5, which are positioned at the outer sides of the movable die 3 and the fixed die 4.

Like this, through this technology production plummet, can once only take out a plurality of plummet from the shaping intracavity, need not the vibration mould, the quality of plummet has been guaranteed better when the drawing of patterns is quick convenient.

Preferably, in order to further enhance the mold releasing effect, a mold releasing agent is applied in the first molding groove 31 of the movable mold 3 and the second molding groove of the fixed mold 4 before mold clamping.

Preferably, after the lead liquid is cooled and solidified to form the lead plummet 8, the excessive solid lead in the casting groove 63 is removed before the movable mold 3 and the fixed mold 4 are disassembled. The solid lead is convenient to open the die after being removed, and the redundant solid lead is recycled and reused to save materials.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.