阅读说明：本技术 一种五金铸件的精密无气泡铸造工艺 (Precise bubble-free casting process of hardware casting ) 是由 黄勇平 于 2020-11-03 设计创作，主要内容包括：本发明公开了一种五金铸件的精密无气泡铸造工艺,属于铸件铸造技术领域,可以实现设有特制的铸造装置,并通过铸造装置来进行五金套管的铸造,铸造装置中芯通气孔、内通芯孔的设置,可便于浇注过程中,芯头处产生的气体的流出,进而有效减少侵入性气泡的产生,铸造装置中浇液析气管的设置,可为金属液提供一个双重的加速效果,从而显著提高金属液内气体的析出,减少析出性气泡的产生,铸造装置中腔自泄气组件的设置,可便于型腔中因浇注产生的气体的流出,从而进一步的减少侵入性气泡的产生,进而从气泡产生的原因着手,可有效的防止五金套管上出现气泡,从而显著提高套管的成品率,节省了资源,提高了生产效率。(The invention discloses a precise bubble-free casting process of a hardware casting, which belongs to the technical field of casting, can realize the arrangement of a special casting device, and carries out the casting of a hardware sleeve by the casting device, the arrangement of a core vent hole and an inner core through hole in the casting device can facilitate the outflow of gas generated at a core head in the casting process, thereby effectively reducing the generation of invasive bubbles, the arrangement of a casting liquid gas-separating pipe in the casting device can provide a double accelerating effect for molten metal, thereby obviously improving the precipitation of gas in the molten metal and reducing the generation of the precipitated bubbles, the arrangement of a cavity self-gas-release component in the casting device can facilitate the outflow of gas generated by casting in a cavity, thereby further reducing the generation of the invasive bubbles, further starting from the reasons generated by the bubbles, and effectively preventing the bubbles from appearing on the hardware sleeve, thereby obviously improving the rate of finished products of the sleeve, saving resources and improving the production efficiency.)

1. The precise bubble-free casting process of the hardware casting is characterized in that: the method comprises the following steps:

s1, placing the core (105) between the upper sand mold (102) and the lower sand mold (104), aligning the core (105) through the core print (106) and the positioning groove (107), and completing the assembly of the casting device;

s2, putting the metal raw material into smelting equipment, and smelting the metal raw material to obtain molten metal, wherein the tapping temperature of the molten metal is 750-;

s3, pouring the molten metal in the S2 into the cavity (108) through a pouring liquid gas-separating pipe (002), wherein the pouring temperature is controlled between 730 ℃ and 745 ℃;

s4, solidifying the molten metal to obtain a blank casting, taking out the blank casting, cleaning the blank casting, and polishing the blank casting after cleaning;

and S5, detecting bubbles in the casting in the S4 through an X-ray detection device, and judging whether the casting has bubbles or not.

2. The precise bubble-free casting process of the hardware casting according to claim 1, characterized in that: the casting device includes assorted cope flask (101) and drag flask (103), be provided with sand mould (102) in cope flask (101), be provided with down sand mould (104) in drag flask (103), it is equipped with assorted core (105) to go up between sand mould (102) and lower sand mould (104), the equal fixedly connected with core (106) in upper and lower both ends of core (105), be formed with die cavity (108) between core (105) and last sand mould (102), lower sand mould (104), it has core air vent (109) to go up sand mould (102), cavity air vent (110) have all been seted up to the both sides of core air vent (109), cavity air vent (110) are linked together with die cavity (108), it installs liquid gas analysis pipe (002) to go up to inlay in sand mould (102), be provided with the chamber in cavity air vent (110) from the subassembly of leaking.

3. The precise bubble-free casting process of the hardware casting as claimed in claim 2, wherein: and positioning grooves (107) matched with the core heads (106) are formed in the upper sand mold (102) and the lower sand mold (104), and the two core heads (106) are respectively spliced with the two positioning grooves (107).

4. The precise bubble-free casting process of the hardware casting as claimed in claim 2, wherein: an inner through core hole (111) is formed in the core (105), and the inner through core hole (111) penetrates through the core head (106) and is communicated with the core vent hole (109).

5. The precise bubble-free casting process of the hardware casting as claimed in claim 2, wherein: the gas separating pipe (002) for the casting liquid comprises a straight pouring pipe (201) and a transverse pouring pipe (202), the straight pouring pipe (201) and the transverse pouring pipe (202) are arranged in an L shape, an outer pouring gate (203) is arranged at the top end of the straight pouring pipe (201), a transverse pouring gate (207) is arranged in the transverse pouring pipe (202), a gas separating straight pouring gate is arranged at the bottom end of the outer pouring gate (203), and the gas separating straight pouring gate comprises a thick upper section (204), a thin accelerating ring (205) and a smooth lower section (206).

6. The precise bubble-free casting process of the hardware casting, according to claim 5, is characterized in that: the top end of the thick upper section (204) is communicated with the outer sprue (203), the bottom end of the smooth lower section (206) is communicated with the cross runner (207), two ends of the thin accelerating ring (205) are respectively communicated with the thick upper section (204) and the smooth lower section (206), and one end, far away from the smooth lower section (206), of the cross runner (207) is communicated with the cavity (108).

7. The precise bubble-free casting process of the hardware casting, according to claim 5, is characterized in that: the inner diameter of the small-opening accelerating ring (205) is smaller than that of the large-opening upper section (204), and the inner wall of the smooth lower section (206) is coated with a high-temperature-resistant smooth coating.

8. The precise bubble-free casting process of the hardware casting, according to claim 5, is characterized in that: two symmetrically-arranged pouring exhaust holes (208) are formed in the straight pouring pipe (201), the pouring exhaust holes (208) are arranged in an L shape, one end of each pouring exhaust hole (208) is communicated with the corresponding smooth lower section (206), and the other end of each pouring exhaust hole penetrates through the straight pouring pipe (201) and is communicated with the outside.

9. The precise bubble-free casting process of the hardware casting according to claim 1, characterized in that: the chamber is from disappointing subassembly and includes self-modulation seal ring (301) on fixed connection and chamber air vent (110) inner wall, the middle part activity of self-modulation seal ring (301) is run through and is linked montant (302), fixed cover is equipped with and is filled up (303) from self-modulation seal ring (301) assorted ring on the outer wall of linkage montant (302), self-modulation seal ring (301) are run through in ring stopper (303), the bottom fixedly connected with of linkage montant (302) and chamber air vent (110) assorted are from the top hole stopper (304) that falls, annular wide logical groove (112) have been seted up in the outside of chamber air vent (110), wide logical groove (112) are located the top and the size that fall hole stopper (304) from the top and are greater than from hole stopper (304).

10. The precise bubble-free casting process of the hardware casting according to claim 9, characterized in that: equal fixedly connected with activity stopper (305) on the outer wall of activity stopper (305) both sides, equal fixedly connected with fixed stopper (306) on the inner wall of chamber air vent (110) both sides, two the bottom of activity stopper (305) offsets with the top of two fixed stoppers (306) respectively, the bottom of the hole stopper that falls from the top (304) flushes mutually with the top of die cavity (108).

Technical Field

The invention relates to the technical field of casting, in particular to a precise bubble-free casting process of a hardware casting.

Background

The casting is a metal molding object obtained by various casting methods, namely, the smelted liquid metal is poured into a casting mold prepared in advance by pouring, injecting, sucking or other casting methods, and after cooling, the casting is subjected to subsequent processing means such as grinding and the like, so that the object with certain shape, size and performance is obtained. The casting has a wide range of applications, and the applications of the casting are on a trend of continuous expansion, and the casting is specifically applied to industries such as buildings, hardware, equipment, machine tools, ships, aerospace, automobiles, locomotives, electronics, computers, electric appliances, lamps and the like, wherein the castings used in the hardware industry are collectively called hardware castings.

The hardware casing pipe is one of common hardware castings, is mainly used as a connecting piece of two fittings, can play splicing and fixing roles, and is generally in a circular pipe shape.

In the prior art, when the hardware sleeve is cast, bubbles (air holes) are easy to appear on the sleeve, the bubbles can reduce the strength of the sleeve, and the sleeve is scrapped, so that the yield is greatly reduced, the resource waste can be caused, and the production efficiency of the sleeve can be influenced.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a precise bubble-free casting process for a hardware casting, which can realize the purpose-made casting device and carry out the casting of a hardware sleeve by the casting device, wherein the arrangement of a core vent hole and an inner through core hole in the casting device can facilitate the outflow of gas generated at a core head in the casting process so as to effectively reduce the generation of invasive bubbles, the arrangement of a pouring liquid gas-separating pipe in the casting device can provide a double acceleration effect for molten metal so as to obviously improve the precipitation of gas in the molten metal and reduce the generation of the precipitated bubbles, the arrangement of a cavity self-gas-leakage component in the casting device can facilitate the outflow of gas generated by the pouring in a cavity so as to further reduce the generation of the invasive bubbles, and further starts from the reasons of the bubbles so as to effectively prevent the bubbles from appearing on the hardware sleeve, thereby obviously improving the rate of finished products of the sleeve, saving resources and improving the production efficiency.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A precise bubble-free casting process of a hardware casting comprises the following steps:

s1, placing the core between the upper sand mold and the lower sand mold, aligning the core through the core print and the positioning groove, and completing the assembly of the casting device;

s2, putting the metal raw material into smelting equipment, and smelting the metal raw material to obtain molten metal, wherein the tapping temperature of the molten metal is 750-;

s3, pouring the molten metal in the step S2 into the cavity through a pouring liquid gas-separating pipe, wherein the pouring temperature is controlled to be 730 ℃ and 745 ℃;

s4, solidifying the molten metal to obtain a blank casting, taking out the blank casting, cleaning the blank casting, and polishing the blank casting after cleaning;

and S5, detecting bubbles in the casting in the S4 through an X-ray detection device, and judging whether the casting has bubbles or not.

Further, the casting device includes assorted cope flask and drag flask, be provided with the sand mould in the cope flask, be provided with sand mould down in the drag flask, go up the sand mould and be equipped with the assorted core down between the sand mould, the equal fixedly connected with core head in upper and lower both ends of core, the core is formed with the die cavity with last sand mould, down between the sand mould, it has the core air vent to go up the sand mould to set up, the chamber air vent has all been seted up to the both sides of core air vent, the chamber air vent is linked together with the die cavity, it installs the liquid of watering and educates the trachea to go up to inlay in the sand mould, be provided with the chamber in the chamber air.

Furthermore, go up in sand mould, the lower sand mould all seted up with core print assorted constant head tank, two the core print pegs graft with two constant head tanks respectively, the setting of core print, constant head tank can be convenient for the core and go up sand mould, lower sand mould and aim at, and then prevent that the core from taking place the incline, improves the casting precision.

Furthermore, an inner through core hole is formed in the mold core, penetrates through the core head and is communicated with the core vent hole, so that the outflow of gas generated at the core head in the pouring process can be facilitated, and the generation of invasive bubbles can be effectively reduced.

Furthermore, the pouring liquid gas separating pipe comprises a straight pouring pipe and a horizontal pouring pipe, the straight pouring pipe and the horizontal pouring pipe are arranged in an L shape, an outer pouring gate is arranged at the top end of the straight pouring pipe, a horizontal pouring gate is arranged in the horizontal pouring pipe, a gas separating straight pouring gate is arranged at the bottom end of the outer pouring gate, and the gas separating straight pouring gate comprises a wide upper section, a narrow accelerating ring and a smooth lower section.

Furthermore, the top end of the wide mouth upper section is communicated with the outer gate, the bottom end of the smooth lower section is communicated with the cross runner, two ends of the narrow mouth accelerating ring are respectively communicated with the wide mouth upper section and the smooth lower section, and one end, far away from the smooth lower section, of the cross runner is communicated with the cavity, so that molten metal can flow into the cavity through the outer gate, the wide mouth upper section, the narrow mouth accelerating ring, the smooth lower section and the cross runner in sequence, and then the molten metal can be poured conveniently.

Furthermore, the internal diameter of the thin opening accelerating ring is smaller than that of the thick opening upper section, after the molten metal flows to the thin opening accelerating ring through the outer pouring gate and the thick opening upper section, the molten metal pressure is increased due to the fact that the thin opening accelerating ring is thinner than the thick opening upper section, and then the flowing of the molten metal is accelerated.

Furthermore, two symmetrically-arranged pouring exhaust holes are formed in the straight pouring pipe, the pouring exhaust holes are L-shaped, one end of each pouring exhaust hole is communicated with the corresponding smooth lower section, the other end of each pouring exhaust hole penetrates through the straight pouring pipe and is communicated with the outside, and therefore outflow of precipitated gas in molten metal can be facilitated.

Further, the chamber is from disappointing subassembly and is included the self-regulating seal ring on fixed connection and the chamber air vent inner wall, the middle part activity of self-regulating seal ring runs through there is the linkage montant, fixed cover on the outer wall of linkage montant be equipped with self-regulating seal ring assorted ring stopper, the ring stopper runs through self-regulating seal ring, the bottom fixedly connected with of linkage montant and chamber air vent assorted from the top hole stopper that falls, annular broad through groove has been seted up in the outside of chamber air vent, broad through the groove and be located the top of the hole stopper that falls from the top and the size is greater than the hole stopper that falls from the top, through the setting of chamber from disappointing subassembly, under normal condition, the ring stopper is inserted in the self-regulating seal ring under the effect of gravity, but when having gas in the die cavity, under the effect of gas pressure, the top moves from the hole stopper rebound from the top, and then drives the ring stopper rebound, causes the hole stopper, The ring plug is separated from the self-adjusting sealing ring, so that the cavity vent hole is communicated, further, the invasive gas generated by pouring in the cavity flows out conveniently, and the generation of invasive bubbles is further reduced.

Further, equal fixedly connected with activity stopper on the outer wall of activity stopper both sides, the fixed stopper of equal fixedly connected with on the inner wall of chamber air vent both sides, two the bottom of activity stopper offsets with the top of two fixed stoppers respectively, the bottom of the hole stopper that falls from the top flushes with the top of die cavity mutually for after the gas outflow in the die cavity, the bottom of the hole stopper that falls from the top can keep flushing with the top of die cavity, and then prevents that the top of foundry goods from producing sunken or protruding, thereby guarantees casting quality.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is equipped with purpose-made casting device, and carry out the casting of five metals sheathed tube through the casting device, the core air vent in the casting device, the setting of interior logical core hole, can be convenient for pour the in-process, the gaseous outflow of core head department production, and then effectively reduce the production of invasive bubble, the setting of pouring liquid gassing pipe in the casting device, can provide a dual effect of accelerating for the molten metal, thereby showing the gaseous separation in the improvement molten metal, reduce the production of precipitated bubble, the setting of casting device middle chamber is from the subassembly that loses heart, can be convenient for because of the gaseous outflow of pouring production in the die cavity, thereby further reduce the production of invasive bubble, and then from the reason that the bubble produced, can effectually prevent the bubble from appearing on the five metals sheathed tube, thereby show improvement sheathed tube yield, resources are saved, and the production efficiency is improved.

(2) Go up all seted up in sand mould, the lower sand mould with core print assorted constant head tank, two core prints peg graft with two constant head tanks respectively, the setting of core print, constant head tank can be convenient for the core and last sand mould, lower sand mould aim at, and then prevent that the core from taking place the incline, improve the casting precision.

(3) Interior logical core hole has been seted up in the core, and interior logical core hole runs through the core head and is linked together with the core air vent, can be convenient for pour the in-process, the outflow of the gas that core head department produced, and then effectively reduce the production of invasive bubble.

(4) The top end of the wide mouth upper section is communicated with the outer pouring gate, the bottom end of the smooth lower section is communicated with the cross gate, two ends of the narrow mouth accelerating ring are respectively communicated with the wide mouth upper section and the smooth lower section, and one end, far away from the smooth lower section, of the cross gate is communicated with the cavity, so that molten metal can flow into the cavity through the outer pouring gate, the wide mouth upper section, the narrow mouth accelerating ring, the smooth lower section and the cross gate in sequence, and then the molten metal can be poured conveniently.

(5) The internal diameter of the thin opening accelerating ring is smaller than the thick opening upper section, the molten metal flows to the back of the thin opening accelerating ring through the outer pouring gate and the thick opening upper section, the molten metal is thinner than the thick opening upper section due to the thin opening accelerating ring, the molten metal pressure is increased, the flowing of the molten metal is accelerated, the inner wall of the smooth lower section is coated with a high-temperature-resistant smooth coating, the inner wall of the smooth lower section is smooth, the friction force between the molten metal and a straight pouring pipe is reduced, the flowing speed of the molten metal is further improved, the precipitation of gas in the molten metal is obviously improved under the effect of a dual accelerating effect, and the generation of precipitable bubbles is reduced.

(6) Two symmetrically-arranged pouring exhaust holes are formed in the straight pouring pipe and are L-shaped, one end of each pouring exhaust hole is communicated with the smooth lower section, and the other end of each pouring exhaust hole penetrates through the straight pouring pipe and is communicated with the outside, so that the outflow of the precipitated gas in the molten metal can be facilitated.

(7) Through the setting of chamber self-bleeding subassembly, under the normal condition, the ring stopper is inserted in self-modulation seal ring under the effect of gravity, nevertheless when having gas in the die cavity, under the effect of gas pressure, the top is moved from top hole stopper rebound, and then drives ring stopper rebound, cause from top hole stopper removal to broad logical groove in, the ring stopper breaks away from with self-modulation seal ring to make the chamber air vent switch on, and then be convenient for because of the gaseous outflow of the invasion that the pouring produced in the die cavity, further reduction invasion bubble's production.

(8) Equal fixedly connected with activity stopper on the outer wall of activity stopper both sides, the fixed stopper of equal fixedly connected with on the inner wall of chamber air vent both sides, the bottom of two activity stoppers offsets with the top of two fixed stoppers respectively, and the bottom of the hole stopper that falls from the top flushes with the top of die cavity mutually for after the gas outflow in the die cavity, the bottom of the hole stopper that falls from the top can keep flushing with the top of die cavity, and then prevents that the top of foundry goods from producing sunken or protruding, thereby guarantees casting quality.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic sectional front view of the casting apparatus of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is an enlarged view taken at B of FIG. 2 in accordance with the present invention;

FIG. 5 is a cross-sectional view within a core of the present invention;

FIG. 6 is a schematic cross-sectional view of the irrigation liquid gas-separating tube of the present invention.

The reference numbers in the figures illustrate:

101. a cope flask; 102. putting a sand mold; 103. a drag flask; 104. a sand mold is put; 105. a core; 106. a core print; 107. positioning a groove; 108. a cavity; 109. a core vent; 110. a cavity vent; 111. an inner core hole; 112. a wide through groove; 002. pouring a liquid gas separating pipe; 201. directly pouring a pipe; 202. transversely casting a pipe; 203. an outer gate; 204. a wide-mouth upper section; 205. a narrow opening accelerating ring; 206. a smooth lower section; 207. a cross gate; 208. pouring an exhaust hole; 301. self-adjusting seal ring; 302. linking the vertical rods; 303. a ring plug; 304. dropping the hole plug from the top; 305. a movable limiting block; 306. and a limiting block is fixed.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-6, a precise bubble-free casting process for hardware castings comprises the following steps:

s1, placing the core 105 between the upper sand mold 102 and the lower sand mold 104, aligning the core 105 through the core print 106 and the positioning groove 107, and completing the assembly of the casting device;

s2, putting the metal raw material into smelting equipment, and smelting the metal raw material to obtain molten metal, wherein the tapping temperature of the molten metal is 750-;

s3, pouring the molten metal in the S2 into the cavity 108 through a pouring liquid gas-separating pipe 002, wherein the pouring temperature is controlled between 730 ℃ and 745 ℃;

s4, solidifying the molten metal to obtain a blank casting, taking out the blank casting, cleaning the blank casting, and polishing the blank casting after cleaning;

and S5, detecting bubbles in the casting in the S4 through an X-ray detection device, and judging whether the casting has bubbles or not.

Referring to fig. 2-6, the casting apparatus includes a cope flask 101 and a drag flask 103 which are matched, an upper sand mold 102 is disposed in the cope flask 101, a lower sand mold 104 is disposed in the drag flask 103, a matched core 105 is disposed between the upper sand mold 102 and the lower sand mold 104, core heads 106 are fixedly connected to upper and lower ends of the core 105, a cavity 108 is formed between the core 105 and the upper sand mold 102 and the lower sand mold 104, the upper sand mold 102 is provided with a core vent 109, cavity vent 110 is disposed on both sides of the core vent 109, the cavity vent 110 is communicated with the cavity 108, positioning slots 107 matched with the core heads 106 are disposed in the upper sand mold 102 and the lower sand mold 104, the two core heads 106 are respectively inserted into the two positioning slots 107, and the core heads 106 and the positioning slots 107 are disposed to facilitate alignment between the core 105 and the upper sand mold 102 and the lower sand mold 104, thereby preventing the core 105 from deviating and, an inner through core hole 111 is formed in the mold core 105, the inner through core hole 111 penetrates through the core head 106 and is communicated with the core vent hole 109, so that gas generated at the core head 106 can flow out conveniently in the pouring process, and further, the generation of invasive bubbles is effectively reduced.

Referring to fig. 2 and 6, a casting liquid gas separating pipe 002 is embedded in the upper sand mold 102, the casting liquid gas separating pipe 002 includes a straight casting pipe 201 and a horizontal casting pipe 202, the straight casting pipe 201 and the horizontal casting pipe 202 are arranged in an L shape, an outer gate 203 is arranged at the top end of the straight casting pipe 201, a horizontal runner 207 is arranged in the horizontal casting pipe 202, a gas separating straight runner is arranged at the bottom end of the outer gate 203, the gas separating straight runner includes a wide opening upper section 204, a narrow opening accelerating ring 205 and a smooth lower section 206, the top end of the wide opening upper section 204 is communicated with the outer gate 203, the bottom end of the smooth lower section 206 is communicated with the horizontal runner 207, two ends of the narrow opening accelerating ring 205 are respectively communicated with the wide opening upper section 204 and the smooth lower section 206, and one end of the horizontal runner 207 far away from the smooth lower section 206 is communicated with the mold cavity 108, so that the molten metal can flow to the mold cavity 108 through the outer gate 203, the wide opening upper section 204, the narrow opening accelerating ring 205, the smooth lower, the inner diameter of the fine opening accelerating ring 205 is smaller than that of the thick opening upper section 204, after the molten metal flows to the fine opening accelerating ring 205 through the outer sprue 203 and the thick opening upper section 204, because the thin opening accelerating ring 205 is thinner than the thick opening upper section 204, the metal liquid pressure is increased, and further the flowing of the metal liquid is accelerated, the inner wall of the smooth lower section 206 is coated with a high temperature resistant smooth coating, so that the inner wall of the smooth lower section 206 is smooth, the friction force between the molten metal and the straight pouring pipe 201 is reduced, the flowing speed of the molten metal is further improved, under the effect of dual acceleration effect, showing and improving the gaseous separation in the molten metal, reducing the production of precipitation nature bubble, having seted up two symmetrical pouring exhaust hole 208 of setting in the straight pouring pipe 201, pouring exhaust hole 208 sets up to the L font, and pouring exhaust hole 208's one end is linked together with smooth hypomere 206, and the other end runs through straight pouring pipe 201 and external intercommunication, can be convenient for the outflow of gaseous separation in the molten metal.

Referring to fig. 2-3, a cavity self-venting assembly is disposed in the cavity vent hole 110, the cavity self-venting assembly includes a self-adjusting sealing ring 301 fixedly connected to an inner wall of the cavity vent hole 110, a linking vertical rod 302 movably penetrates through a middle portion of the self-adjusting sealing ring 301, a ring plug 303 matched with the self-adjusting sealing ring 301 is fixedly sleeved on an outer wall of the linking vertical rod 302, the ring plug 303 penetrates through the self-adjusting sealing ring 301, a top-down hole plug 304 matched with the cavity vent hole 110 is fixedly connected to a bottom end of the linking vertical rod 302, an annular wide through groove 112 is disposed on an outer side of the cavity vent hole 110, the wide through groove 112 is located above the top-down hole plug 304 and has a size larger than that of the top-down hole plug 304, the ring plug 303 is inserted into the self-adjusting sealing ring 301 under the action of gravity through the arrangement of the cavity self-venting assembly under normal conditions, but when gas exists in the cavity 108, the top-down hole, and then drive ring stopper 303 rebound, cause and remove to broad logical groove 112 from top hole stopper 304, ring stopper 303 breaks away from with self-modulation seal ring 301, thereby make chamber air vent 110 switch on, and then be convenient for the gaseous outflow of the invasive that produces because of the pouring in the die cavity 108, further production of reduction invasive bubble, equal fixedly connected with activity stopper 305 on the outer wall of activity stopper 305 both sides, equal fixedly connected with fixes stopper 306 on the inner wall of chamber air vent 110 both sides, the bottom of two activity stoppers 305 offsets with the top of two fixed stoppers 306 respectively, the bottom of top hole stopper 304 flushes with the top of die cavity 108 mutually, make behind the gaseous outflow in the die cavity 108, the bottom of top hole stopper 304 can keep flushing with the top of die cavity 108, and then prevent that the top of foundry goods from producing sunken or protruding, thereby guarantee casting quality.

The invention is provided with a specially-made casting device, and the casting of the hardware sleeve is carried out by the casting device, the arrangement of the core vent hole 109 and the inner core through hole 111 in the casting device can facilitate the outflow of gas generated at the core head 106 in the casting process, thereby effectively reducing the generation of invasive bubbles, the arrangement of the casting liquid gas-separating pipe 002 in the casting device can provide a double acceleration effect for the molten metal, thereby obviously improving the gas separation in the molten metal and reducing the generation of the precipitated bubbles, the arrangement of the cavity self-gas-release component in the casting device can facilitate the outflow of gas generated by the casting in the cavity 108, thereby further reducing the generation of the invasive bubbles, starting from the reasons of the bubbles, effectively preventing the bubbles from appearing on the hardware sleeve, thereby obviously improving the yield of the sleeve, saving resources and improving the production efficiency.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.