CN213671724U - Molding die with exhaust channel - Google Patents

Abstract

The utility model discloses a take exhaust passage's molding die relates to casting mould technical field, its characterized in that: including cope flask (1), drag flask (2) and template (6), template (6) set up in the middle of cope flask (1) and drag flask (2), cope flask (1) edge sets up first sand box core vent (3), drag flask (2) edge sets up second sand box core vent (8), set up exhaust passage (5) and template core vent (7) on template (6), template core vent (7) with exhaust passage (5) intercommunication. The utility model discloses can solve the back of the body sand face sand mould intensity inadequately, the product appears falling sand and glues the sand problem, promotes the product yield.

Description

Molding die with exhaust channel

Technical Field

The utility model relates to a casting mould technical field especially relates to a take exhaust passage's molding die.

Background

The Japanese east molding line used by the company is a horizontal parting vertical sand shooting flaskless molding line, the production line adopts the unidirectional sand shooting of the two sides of the template, when the height of a product is greater than that of a sand shooting opening or the product is smaller, the whole fall is uneven, more products are placed on the template, and a sand back surface can be formed in the opposite direction of the sand shooting opening, so that the local sand mold strength is insufficient, the problem of sand falling and sand sticking of the product occurs, and the product yield is further influenced.

The metal liquid of the mechanical sand-sticking system seeps into gaps between sand grains of the sand mould or the sand core, is sintered with the sand and is adhered to the surface of the casting. It may be a thin layer or a thick layer of several millimeters. The molten metal sometimes penetrates the entire cross-section of the core, causing the internal cavity to become blocked, which is often impossible to remove and the casting has to be scrapped.

The chemical sticky sand system metal liquid reacts to generate metal oxide which reacts with the molding material to form the ferric silicate dross with strong adhesion. It is most likely to occur at the gates or thick walls in the castings, especially when the sand molds or cores are thin and the castings are thick.

Chinese patent document CN202725949U, published in 2013, 2, and 13, discloses a molding die, which comprises a molding die body, wherein the molding die body is provided with a sand shooting nozzle molding, a sand shooting nozzle, a sand core and a riser, the sand core is connected with the sand shooting nozzle, the riser is arranged above the sand core, and a sand backing surface is also formed in the opposite direction of the sand shooting nozzle, so that the local sand mold strength is not enough, the problem of sand falling and sand sticking of a product occurs, and the product yield is further affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses can form not enough of mechanical sand sticking and chemical sand sticking to foundry goods back of body sand face, provide a can take exhaust passage's molding die.

The technical scheme adopted for realizing the purpose is as follows: a molding die with an exhaust channel comprises an upper molding box 1, a lower molding box 2 and a template 6, wherein the template 6 is arranged between the upper molding box 1 and the lower molding box 2, the upper molding box 1 is provided with a first molding box vent plug 3, the lower molding box 2 is provided with a second molding box vent plug 8, the template 6 is provided with an exhaust channel 5 and a template vent plug 7, and the exhaust channel 5 is communicated with the template vent plug 7.

Preferably, the first flask vent plug 3, the second flask vent plug 8 and the pattern plate vent plug 7 are honeycomb hole vent plugs.

Preferably, the first flask venting plug 3, the second flask venting plug 8 and the pattern plate venting plug 7 are all made of stainless steel.

Preferably, the upper mold sand box 1 and the lower mold sand box 2 are respectively provided with a sand shooting port 4 at the same side.

Preferably, the pattern plate air vent plug 7 is arranged in the opposite direction of the sand shooting port 4.

Preferably, the exhaust passage 5 is arranged in the opposite direction of the sand shooting opening 4.

The inventor of the utility model finds out through a plurality of times of tests: this design promotes mechanical and chemical sand-stick if the structure of the castings and patterns will cause the sand molds to have sharp corners, overhanging or protruding shapes, or to have flat, thin sand tables or cores. Because the casting with the structure can concentrate the local heat of the sand mould and the sand core, the normal performance of the casting is damaged, the surface of the sand mould and the sand core is broken in advance, and molten metal or metal oxide is easy to infiltrate to generate mechanical sand sticking and chemical sand sticking. For this reason, a special sand mold, such as zircon sand or olivine sand, may be used at a portion where heat is concentrated to improve its ability to be heated for a long time or irradiated at a high temperature, but the problem cannot be completely solved.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a set up first sand box core vent at the cope flask, the drag flask sets up second sand box core vent, sets up exhaust passage and template core vent in the template for the direction of penetrating the sand mouth, realizes increasing the exhaust at the sand mouth back of penetrating. And then the problems that the sand mould strength of the back sand surface is not enough, the sand falls and is stuck on the product are solved, and the yield of the product is improved.

The utility model discloses all design first sand box core vent, second sand box core vent and template core vent into honeycomb holes core vent, have following effect: 1) compacting the sand core; 2) for the cold core box, hard blowing gas is guaranteed to penetrate through the whole sand core, and no dead angle is generated.

And, the utility model discloses first sand box core vent, second sand box core vent and template core vent all adopt stainless steel, and ventilation effect is good, powerful reduction air current, consent and casting are not filled, and it is convenient to change.

Drawings

The following describes the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a sand-backed surface in an original state.

FIG. 2 is the structure schematic diagram of the sand-shooting mouth surface of the utility model

Fig. 3 is the structural schematic diagram of the back sand surface of the utility model.

Fig. 4 is a front view of the structure of the back sand surface of the present invention.

Fig. 5 is a sectional view taken along line a-a of fig. 4 according to the present invention.

The method comprises the following steps of 1-cope flask, 2-drag flask, 3-first flask vent plug, 4-sand shooting port, 5-vent channel, 6-template, 7-template vent plug and 8-second flask vent plug.

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 to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The original structure only sets up first sand box core vent 3 at last mould sand box, and the lower mould sand box sets up second core vent 8, and this production line adopts template both sides folk prescription to penetrate the sand, and it is less when penetrating the sand mouth height or product when the product height is greater than, and whole drop is uneven, and the product is placed more again on the template, and in the relative direction of penetrating the sand mouth, can form the sand backing surface, causes local sand mould intensity not enough, and the product appears falling sand and glues the sand problem, and then influences the product yield.

The utility model discloses a take exhaust passage's molding die, including cope flask 1, lower mould sand box 2 and template 6, template 6 sets up in the middle of cope flask 1 and lower mould sand box 2, respectively sets up one at cope flask 1 and lower mould sand box 2 homonymy and penetrates sand mouth 4, increases template core vent 7 and exhaust passage 5 in the direction of 6 relative core vents 4 of template, exhaust passage 5 and template core vent 7 one-to-one, exhaust passage 5 communicates with each other respectively with template core vent 7 to reinforcing back of the body sand face exhaust effect avoids the emergence of mechanical sand sticking and chemical sand sticking, is provided with first sand box core vent 3 at cope flask 1 edge, sets up second sand box core vent 8 at lower mould sand box 2 edge, thereby can solve back of the body sand face sand type intensity inadequately, the product appears falling sand and glues the sand problem, promotes the product yield.

The utility model discloses all design first sand box core vent 3, second sand box core vent 8 and template core vent 7 as honeycomb holes core vent, it enables the psammitolite and penetrates really, is the assurance to blow hard gas to pierce through whole psammitolite to the cold core box, does not produce the dead angle. And, the utility model discloses first sand box core vent 3, second sand box core vent 8 and template core vent 7 all adopt stainless steel, and ventilation effect is good, powerful reduction air current, and consent and casting are not filled, and it is convenient to change.

The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides a take exhaust passage's molding die which characterized in that: including cope flask (1), drag flask (2) and template (6), template (6) set up in the middle of cope flask (1) and drag flask (2), cope flask (1) edge sets up first sand box core vent (3), drag flask (2) edge sets up second sand box core vent (8), set up exhaust passage (5) and template core vent (7) on template (6), template core vent (7) with exhaust passage (5) intercommunication.

2. The molding die with the air discharge passage according to claim 1, wherein: the first sand box vent plug (3), the second sand box vent plug (8) and the template vent plug (7) are honeycomb hole vent plugs.

3. The molding die with the air discharge passage according to claim 2, wherein: the first sand box vent plug (3), the second sand box vent plug (8) and the template vent plug (7) are all made of stainless steel materials.

4. The molding die with the air discharge passage according to claim 1, wherein: and the sand shooting ports (4) are respectively arranged on the same sides of the cope flask (1) and the drag flask (2).

5. The molding die with the air discharge passage according to claim 4, wherein: the template air exhaust plug (7) is arranged in the direction opposite to the sand shooting port (4).

6. The molding die with the air discharge passage according to claim 4, wherein: the exhaust channel (5) is arranged in the opposite direction of the sand shooting port (4).

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