CN112122548A

CN112122548A - Precoated sand mold

Info

Publication number: CN112122548A
Application number: CN201910547141.8A
Authority: CN
Inventors: 胡三六; 方继东
Original assignee: Yuexi County Shunda Machinery Co ltd
Current assignee: Yuexi County Shunda Machinery Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-12-25

Abstract

The invention discloses a precoated sand mold, which comprises a base, a lower mold and an upper mold, wherein a pressing plate is fixedly arranged at the upper end of a supporting rod through a bolt, the pressing plate is positioned at the edge of the upper mold, heat dissipation plates are fixedly arranged at the upper end of the pressing plate and the lower end of the base, heat dissipation pipes are respectively arranged inside the side walls of the upper mold and the lower mold, and air holes are formed in the side walls of the heat dissipation pipes. The quality of the casting is improved.

Description

Precoated sand mold

Technical Field

The invention relates to the technical field of precoated sand molds, in particular to a precoated sand mold.

Background

The molding sand with a layer of solid resin film coated on the surface of sand grains before molding and core making is called precoated sand or shell (core) sand, air outlets are difficult to process in a precoated sand mold, when the precoated sand mold is produced and poured on a workpiece, the precoated sand mold needs to be heated to melt the resin inside, and the precoated sand mold needs to be cooled after heating is completed for use, but in the prior art, the precoated sand mold is generally kept still to be naturally cooled, so that the cooling time is long, and the precoated sand mold after pouring is kept still and cooled, so that the cooling time of a casting is long, the production efficiency is influenced, some gas can be generated in the melting process of the resin, some filled resin can generate gas when being heated, and the gas can enter an injection molding piece, the quality of the casting is affected.

Disclosure of Invention

The invention aims to provide a precoated sand mold, which aims to solve the problems that the casting is cooled for a long time by the precoated sand mold in the background technology, so that the production efficiency is influenced, some gas can be generated in the resin melting process, and some filling resin can generate gas when being heated in the pouring process, and the gas can enter an injection molding to influence the quality of the casting.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a tectorial membrane sand mould, includes base, bed die and goes up the mould, the bed die is located the upper end of base, the lower extreme four corners fixed mounting of base has the supporting seat, the bracing piece is installed through the bolt to the up end of base, there is the clamp plate upper end of bracing piece through bolt fixed mounting, and the clamp plate is located the edge of going up the mould, the upper end and the base lower extreme fixed mounting of clamp plate have the heating panel, the inside cooling tube that all is provided with of lateral wall of going up mould and bed die, the gas pocket has been seted up to the lateral wall of cooling tube.

Preferably, the inside cooling tube of the lateral wall of last mould and bed die is located same vertical plane, the contact surface of going up mould and bed die is provided with the locating piece, just the lower extreme and the bed die fixed connection of locating piece, the locating piece be located between the cooling tube of mould and bed die, the lower extreme of going up the mould seted up with locating piece assorted locating hole.

Preferably, the up end of locating piece is provided with the installation axle that is used for installing the cooling tube with the body, just the air vent that runs through the locating piece is seted up to the axle center of installation axle, just the upper and lower both ends of locating piece set up to the round platform type.

Preferably, the upper end of the radiating pipe inside the upper die is fixedly connected with a heat conducting sheet, and the heat conducting sheet is provided with a mounting hole matched with the radiating pipe.

Preferably, the bottom of the heat dissipation pipe located inside the lower mold penetrates through the base, and the bottom of the heat dissipation pipe is fixedly connected with the heat dissipation plate located at the lower end of the base.

Preferably, the outer side of the air hole is fixedly provided with a separation net.

Preferably, the pressing plate is provided with an air guide hole matched with the mounting hole, and the pressing plate is always attached to the heat conducting sheet when being mounted.

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

1. according to the invention, the heat dissipation capacity of the precoated sand mold can be increased by arranging the heat dissipation pipe and the heat dissipation plate, so that the precoated sand mold has a better heat dissipation effect, the cooling time of the mold is shortened, and the production efficiency is improved.

2. The gas pocket of seting up on the cooling tube can make the inside gas that produces of tectorial membrane sand mould enter into the cooling tube from the gas pocket inside to outside the mould is discharged through the cooling tube, make the mould exhaust more convenient, can avoid gas to get into the foundry goods, improve the quality of foundry goods.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the heat pipe of the present invention;

FIG. 4 is a schematic view of the vent of the present invention;

FIG. 5 is a schematic view of a positioning block according to the following embodiment 1 of the present invention;

FIG. 6 is a cross-sectional view of the heat pipe of the present invention;

fig. 7 is a schematic structural view of a mounting shaft according to embodiment 2 of the present invention.

In the figure: 1. a base; 2. a lower die; 3. an upper die; 31. positioning holes; 4. a support bar; 5. pressing a plate; 6. a heat dissipation plate; 7. installing a shaft; 8. a radiating pipe; 81. air holes; 82. separating the net; 9. positioning blocks; 91. installing a shaft; 92. a vent hole; 10. a heat conductive sheet; 101. and (7) installing holes.

Detailed Description

The invention provides a precoated sand mold, aiming at solving the problems that the casting is cooled for a long time to influence the production efficiency, some gas can be generated in the resin melting process, and some filling resin can generate gas when being heated in the pouring process, and the gas can enter an injection molding part to influence the quality of the casting. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-6, the present embodiment provides a precoated sand mold, which includes a base 1, a lower mold 2 and an upper mold 3, the lower die is positioned at the upper end of the base 1, four corners of the lower end of the base 1 are fixedly provided with supporting seats 7, the supporting seats 7 enable the base 1 to have a distance from the ground, air circulation at the bottom of the base 1 is facilitated, the upper end surface of the base 1 is provided with a support rod 4 through a bolt, the upper end of the support rod 4 is fixedly provided with a pressing plate 5 through a bolt, and the pressing plate 5 is positioned at the edge of the upper die 3, the upper end of the pressing plate 5 and the lower end of the base 1 are fixedly provided with heat dissipation plates 6, the inner parts of the side walls of the upper die 3 and the lower die 2 are respectively provided with a radiating pipe 8, the radiating pipes 8 are vertically arranged relative to the upper die 3 and the lower die 2, the side wall of the radiating pipe 8 is provided with an air hole 81, so that the radiating pipe 8 can more conveniently radiate heat.

The both ends of cooling tube 8 are the opening form, can make things convenient for the gas in cooling tube 8 to spill over, go up the upper end and the clamp plate 5 contact of cooling tube in the mould 3, heating panel 8 and the contact of base 1 in the

bed die

2, and 1 lower extreme fixed mounting of upper end and base of clamp plate 5 has heating panel 6, heating panel 6 can accelerate the heat dissipation to the mould, make the radiating effect of mould better, heating panel 6 is provided with a plurality of, and vertical the placing, all leave certain clearance between every heating panel 6, the distance in clearance can be confirmed according to the production demand of reality, the preferred is 2-5 mm.

And the inside cooling tube 8 of the lateral wall of last mould 3 and bed die 2 is located same vertical plane, the contact surface of going up mould 3 and bed die 2 is provided with locating piece 9, just the lower extreme and the 2 fixed connection of bed die of locating piece 9, the locating piece 9 be located between the cooling tube 8 of mould 3 and bed die 2, the lower extreme of going up mould 3 seted up with locating piece 9 assorted locating hole 31, and the axle center of locating piece 9 has seted up the air vent 92 that runs through locating piece 9 for the inside cooling tube 8 of the lateral wall of last mould 3 and bed die 2 communicates, makes things convenient for the inside gas of bed die 2 to spill, and two cooling tubes 8 that make simultaneously connect into a whole, make the heat conduction more even, thereby guarantee the quality of foundry goods.

In addition, in order to ensure that the air holes 81 are not blocked in the process of melting the precoated sand, the outer sides of the air holes 81 are fixedly provided with the separation nets 82, so that the air holes 81 are not blocked in the process of melting the precoated sand, and the influence on the air outlet of the mold is avoided.

Example 2

Referring to fig. 1, fig. 2, fig. 3 and fig. 7, a further improvement is made on the basis of embodiment 1: the up end of locating piece 9 is provided with the installation axle 91 that is used for installing cooling tube 8 with the body, and installation axle 91 is convenient for to the installation of cooling tube 8, just installation axle 91's axle center sets up the air vent 92 that runs through locating piece 9, just the upper and lower both ends of locating piece 9 set up to the round platform type, and the round platform type structure can be more convenient to the location between last mould 3 and the bed die 2, and the locating hole of round platform type structure can more conveniently aim at the more thin part in round platform structure upper end, utilizes the inclined plane of round platform to more conveniently fix a position.

Moreover, the upper end of the radiating pipe 8 inside the upper die 3 is fixedly connected with a heat conducting sheet 10, the heat conducting sheet 10 is provided with a mounting hole 101 matched with the radiating pipe 8, and the heat conducting sheet 10 can increase the contact surface between the radiating pipe 8 and the pressure plate 5, so that the heat conduction area can be increased, and the cooling time is shortened; the pressure plate 5 is provided with an air guide hole 51 matched with the mounting hole 101, the air guide hole 51 can enable air in the radiating pipe 8 to overflow, and the pressure plate 5 is always attached to the heat conducting fin 10 when being mounted; can guarantee the contact of heat-conducting surface to guarantee the normal heat dissipation of mould, the bottom that is located the inside cooling tube 8 of bed die runs through base 1, and the bottom of cooling tube 8 and the 6 fixed connection of heating panel that are located base 1 lower extreme can accelerate the heat dissipation of cooling tube 8.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "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 further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a tectorial membrane sand mould, includes base (1), bed die (2) and goes up mould (3), the bed die is located the upper end of base (1), the lower extreme four corners fixed mounting of base (1) has supporting seat (7), its characterized in that: bracing piece (4) are installed through the bolt to the up end of base (1), there is clamp plate (5) upper end of bracing piece (4) through bolt fixed mounting, and clamp plate (5) are located go up the edge of mould (3), the upper end and the base (1) lower extreme fixed mounting of clamp plate (5) have heating panel (6), the inside cooling tube (8) that all is provided with of lateral wall of going up mould (3) and bed die (2), gas pocket (81) have been seted up to the lateral wall of cooling tube (8).

2. The precoated sand mold according to claim 1, wherein: go up inside cooling tube (8) of lateral wall of mould (3) and bed die (2) and be located same vertical plane, the contact surface of going up mould (3) and bed die (2) is provided with locating piece (9), just the lower extreme and bed die (2) fixed connection of locating piece (9), locating piece (9) lie in between cooling tube (8) of mould (3) and bed die (2), go up the lower extreme of mould (3) and offer with locating piece (9) assorted locating hole (31).

3. The precoated sand mold according to claim 2, wherein: the up end of locating piece (9) is provided with the installation axle (91) that is used for installing cooling tube (8) with the body, just air vent (92) that run through locating piece (9) are seted up in the axle center of installation axle (91), just the upper and lower both ends of locating piece (9) set up to the round platform type.

4. A coated sand mold as defined in claim 1, 2 or 3, wherein: go up inside mould (3) the upper end fixedly connected with conducting strip (10) of cooling tube (8), and seted up on conducting strip (10) with cooling tube (8) assorted mounting hole (101).

5. A coated sand mold as defined in claim 1, 2 or 3, wherein: the bottom of the radiating pipe (8) positioned in the lower die penetrates through the base (1), and the bottom of the radiating pipe (8) is fixedly connected with the radiating plate (6) positioned at the lower end of the base (1).

6. The precoated sand mold according to claim 1, wherein: and a separation net (82) is fixedly arranged on the outer side of the air hole (81).

7. The precoated sand mold according to claim 4, wherein: the pressing plate (5) is provided with an air guide hole (51) matched with the mounting hole (101), and the pressing plate (5) is always attached to the heat conducting sheet (10) during mounting.