CN217018484U - Resin psammitolite exhaust apparatus - Google Patents

Abstract

The utility model discloses a resin sand core exhaust device which comprises a resin sand core, wherein the resin sand core comprises a main body, an inner hole is formed in the main body, and the inner hole is vertically straight. The utility model has reasonable design, solves the defects of castings caused by unsmooth exhaust due to downward exhaust of the exhaust port in the prior art, and also solves the defects of molten iron loss and temperature and time reduction due to upward exhaust of the exhaust port in the prior art, and the up-and-down direct exhaust mode is smoother, thereby reducing the rejection rate of the castings.

Description

Resin psammitolite exhaust apparatus

Technical Field

The utility model relates to the technical field of resin sand core equipment for casting, in particular to an exhaust device for a resin sand core.

Background

The known resin sand core needs to be ignited and dried when being shaped, and the sand core is surrounded by high-temperature molten iron to generate a large amount of gas in the casting process, so an exhaust device needs to be arranged; at present, a commonly used resin sand core exhaust device comprises a core box provided with a sand inlet hole, a sand core arranged in the core box, and a ventilation rope with one end arranged in the sand core, wherein the other end of the ventilation rope is exposed out of the end surface of the sand core; when the air is ignited and dried, the exposed part of the air rope can be burnt to block the air channel, thus the air outlet of the sand core is influenced, the box is choked, and the quality of the casting is influenced. There are two ways in which the technology is currently used:

firstly, the exhaust port faces downwards, the exhaust mode is not ideal, and the exhaust is not smooth, so that the waste products of the castings are increased;

the second kind, the gas vent up, but need climb over the resin psammitolite and pour, extravagant molten iron promptly like this, reduce molten iron temperature and pouring time again, consequently can't satisfy the user demand. If the utility model discloses a chinese utility model patent of granted bulletin number CN204486723U, disclosed a kind of resin psammitolite exhaust apparatus, including the core box that is equipped with into sand hole, arrange the psammitolite in the core box in, be equipped with the rope of ventilating in the psammitolite, one side that one of a gas outlet needle passed the core box contacts with the rope of ventilating in the sand core.

The existing resin sand core exhaust device technology needs the ventilation rope to be completely positioned in the sand core, the air outlet needle is pulled out when the sand core is taken out, the ventilation rope cannot be burnt, the exhaust channel is prevented from being blocked and the choking box is caused, the casting quality is ensured, but the other end of the ventilation rope is exposed on the end face of the sand core, the exposed part of the ventilation rope can be burnt when the sand core is ignited and dried, the ventilation channel is blocked, the air outlet of the sand core is influenced, the choking box is caused, the casting quality is influenced, the casting rejection rate is easy to generate, and therefore the improvement is needed.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to overcome the defects in the prior art, the utility model provides the resin sand core exhaust device which is reasonable in design, overcomes the defects of castings caused by unsmooth exhaust due to downward exhaust of an exhaust port in the prior art, overcomes the defects of molten iron loss due to upward exhaust of the exhaust port and temperature and time reduction in the prior art, is more smooth in exhaust in an up-and-down direct connection mode, and reduces the rejection rate of the castings.

(II) technical scheme to be adopted

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the resin sand core exhaust device comprises a resin sand core, wherein the resin sand core comprises a main body, an inner hole is formed in the main body, and the inner hole is straight up and down.

Preferably, a plurality of protrusions are arranged on one side of the main body, and the wall thickness of each protrusion is consistent with that of the main body.

Preferably, the cross section of the protrusion is circular arc-shaped.

Preferably, a groove is arranged on the body corresponding to the protrusion.

Preferably, the groove is circular arc-shaped.

Preferably, the radius of the groove is smaller than the radius of the protrusion.

Preferably, the main body is provided with at least one upper vent hole and at least one lower vent hole.

Preferably, there is one upper vent hole and one lower vent hole.

Preferably, the number of the upper vent holes is two, and the number of the lower vent holes is two

Preferably, the resin sand core box further comprises a core box for installing the resin sand core, a sand mold matched with the resin sand core and an exhaust channel are arranged in the core box, and the exhaust channel is communicated with the sand mold.

(III) technical effects to be achieved

Compared with the prior art, the utility model has the following beneficial effects:

the main body of the utility model is provided with the inner hole which is straight-through from top to bottom, the arrangement solves the defects of castings caused by unsmooth exhaust due to downward exhaust port, can also solve the defects caused by molten iron lost due to upward exhaust port and temperature and time reduction, and realizes straight-through exhaust from top to bottom, so that the exhaust is smoother, and the use requirements can be met.

Secondly, the resin sand core comprises a main body, wherein the interior of the main body is of a hollow structure, a plurality of bulges are arranged on one side edge of the main body, the wall thickness of each bulge is consistent with the wall thickness of the main body, the design is reasonable, the structure is simple, the production and the manufacture are convenient, meanwhile, the interior of the main body is of a hollow structure, a plurality of bulges are arranged on one side edge of the main body, and the wall thickness of each bulge is consistent with the wall thickness of the main body, so that the smooth circulation of gas is facilitated, and the gas can be discharged better.

Thirdly, a plurality of bulges are arranged on one side edge of the main body, the wall thickness of each bulge is consistent with that of the main body, and the smooth circulation of gas is facilitated, so that the gas can be discharged better.

Fourthly, the casting sand core box comprises a core box used for installing the resin sand core, a molding sand model matched with the resin sand core and an exhaust passage are arranged in the core box, and the exhaust passage is communicated with the molding sand model, so that the rejection rate of castings is greatly reduced, the condition that the casting sand core is climbed for casting is avoided, the waste of molten iron is reduced, the temperature and the casting time of the molten iron are reduced, and the using requirements can be met.

Drawings

FIG. 1 is a schematic front view of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

FIG. 3 is a schematic view of a resin sand core according to an embodiment of the present invention.

Fig. 4 is a schematic side view in the direction of a resin sand core embodiment of the present invention.

Fig. 5 is a schematic view of a second embodiment of the resin sand core of the present invention.

Fig. 6 is a schematic side view in the direction of a resin sand core of an embodiment of the present invention.

FIG. 7 is a schematic view of the resin sand core of the present invention positioned in a core box

FIG. 8 is a schematic view of the installation of the resin sand core of the present invention into a core box

In the figure: 1, resin sand core; 2, a core box; 11, a main body; 12, an inner hole; 13, raising; 14, a groove; 15, upper vent holes; 16, hanging a table; 17, a lower vent hole; 21, molding sand model; 22, an exhaust passage.

Detailed Description

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present invention are conventionally placed when used, and are merely used for convenience of describing and simplifying the description, but do not indicate or imply that the device or element to which the reference is made 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, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, 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 a specific case to those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the utility model and not to limit the scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The first embodiment is as follows: the utility model relates to an exhaust device for a resin sand core, which comprises a resin sand core 1, wherein the resin sand core 1 comprises a main body 11, an inner hole 12 is formed in the main body 11, and the inner hole 12 is vertically through, the resin sand core 1 exhausts through the vertically through way, compared with the traditional exhaust mode, the exhaust device is more direct, is beneficial to casting and has more obvious advantages.

The second embodiment: on the basis of the first embodiment, as further shown in fig. 1 and 2, a plurality of protrusions 13 are disposed on one side of the main body 11, and the wall thickness of the protrusions 13 is consistent with that of the main body 11. It is supposed that the cross section of the bulge 13 is arc-shaped, the arrangement is more favorable for smooth internal gas circulation, the situation that the gas cannot be discharged due to accumulation at right angles is avoided, the arc shape is smoother, and the production and the manufacture of the resin sand core 1 are facilitated. The main body 11 corresponding to the protrusion 13 is provided with a groove 14, and the groove 14 is also arc-shaped, which is more beneficial to smooth gas circulation. Furthermore, the radius of the groove 14 is smaller than that of the protrusion 13, and the arrangement is more reasonable and more beneficial to practical use. It is further noted that, in the present embodiment, the number of the protrusions 13 is two, and correspondingly, the number of the grooves 14 is also two, and the shape of the resin sand core 1 is similar to a butterfly with spread wings, so that not only the strength of the inward bending is increased, but also the overall novelty can better meet the use requirement. In order to solve the problem that the groove 14 (inner bend) is a weak link and can be broken in the installation and use process, the casting process follows the principle of uniform wall thickness, and the inner bend becomes a casting hot node and forms shrinkage porosity and hot cracking due to the reasons of design, use scenes and the like of the casting body, wherein the thickness is not uniform and the distance is short, so that the wall thickness is increased at the groove 14 (inner bend), the strength is improved, the breakage during fastening is prevented, and the shrinkage porosity and hot cracking during casting is also solved.

Example three: on the basis of the first embodiment, as shown in fig. 3 and 4, the main body 11 is provided with at least one upper vent hole 15, a hanging table 16 (for facilitating the manufacture of the main body 11 in the production process), and a lower vent hole 17. In this embodiment, there is one upper vent 15, two hanging bases 16, and one lower vent 17, which is similar to a three-way type.

Example four: on the basis of the first embodiment, as shown in fig. 5 and 6, at least one upper vent hole 15, a hanging platform 16 (for facilitating the manufacturing of the main body 11 in the production process) and a lower vent hole 17 are provided on the main body 11. In this embodiment, there are two upper vent holes 15, two hanging bases 16, and two lower vent holes 17, which are similar to a four-way type.

Example five: in addition to the first embodiment, the second embodiment, the third embodiment or the fourth embodiment, as shown in fig. 7 and 8, the present invention further includes a core box 2 for installing the resinated sand core 1, a pattern 21 and an exhaust passage 22 are provided inside the core box 2 to match the resinated sand core 1, and the exhaust passage 22 communicates with the pattern 21 to exhaust air. During the use, the resin sand core 1 is installed in the sand mould 21 of core box 2, then carries out the molten iron and pours, pours the in-process and produces gas, and gas is provided with hole 12 in the main part 11 of resin sand core 1 from the main part 11 inside, hole 12 is straight-through from top to bottom, and main part 11 rises to the top and then discharges through exhaust passage 22 from main part 11, realizes the exhaust effect, and this kind has avoided blockking up its exhaust passage 22, and then has avoided influencing the sand core and give vent to anger, also avoids causing and chocks the case to avoid influencing the foundry goods quality, improved foundry goods yield.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.

Claims (3)

1. The utility model provides a resin psammitolite exhaust apparatus, includes resin psammitolite (1), its characterized in that: resin psammitolite (1) includes main part (11), be provided with hole (12) on main part (11), hole (12) are straight-through from top to bottom, be provided with arch (13) of a plurality of on one side of main part (11), the wall thickness of arch (13) with main part (11) wall thickness is unanimous, be provided with upper portion air vent (15) and lower part air vent (17) of at least one on main part (11), still including being used for the installation core box (2) of resin psammitolite (1), core box (2) inside be provided with resin psammitolite (1) matched with sand model (21) and exhaust passage (22), exhaust passage (22) with sand model (21) are linked together.

2. The resin sand core exhaust apparatus as set forth in claim 1, wherein: the number of the upper vent holes (15) is one, and the number of the lower vent holes (17) is one.

3. The resin sand core exhaust apparatus as set forth in claim 1, wherein: the number of the upper vent holes (15) is two, and the number of the lower vent holes (17) is two.

Images