CN202224602U

CN202224602U - Coated sand core shooting machine

Info

Publication number: CN202224602U
Application number: CN2011202830333U
Authority: CN
Inventors: 侯国冰
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2012-05-23
Anticipated expiration: 2021-08-05

Abstract

The utility model relates to a coated sand core shooting machine which comprises a sand storage tank used for storing coated sand, a coated sand distributor communicated with the bottom of the sand storage tank, a sand core mould arranged on the coated sand distributor, a rotating machine body used for adjusting the sand core mould, an electrical heating tube connected with the sand core mould, and a temperature control device used for controlling the temperature of the electrical heating tube, wherein the top end of the sand core mould is covered with a press plate; and a rubber sealing gasket is connected between the press plate and the sand core mould. The coated sand core shooting machine adopts mechanical parts to manufacture a coated sand core, thus being convenient for manufacturing; a product manufactured by the coated sand core shooting machine has the advantages of being high in strength, smooth in surface, hard in water absorption and the like so as to be convenient to be stored; and compared with a clay sand shape, the coated sand core shooting machine ensures the qualification rate of castings to be improved to 99% from the original 93%, improves the modeling efficiency by 23% and lightens the labor intensity of workers.

Description

The precoated sand core shooter

Technical field

The utility model relates to the field of precoated sand, especially a kind of precoated sand core shooter.

Background technology

Precoated sand is a kind of sand grain surface promptly is covered with one deck hard resin film before moulding molding sand or a core sand; Two kinds of coating techniques of cold process and Re Fafa are arranged: cold process with resin dissolves, and adds methenamine with ethanol in the mulling process, make the two be coated on sand grain surface; The ethanol volatilization gets precoated sand; Hot method is to be preheating to uniform temperature to sand, adds resin and makes its fusion, stirs to make resin-coated at sand grain surface, adds the methenamine aqueous solution and lubricant.Cooling, broken, sieve precoated sand.Because above two kinds of preparation methods, its production technology are quite complicated, the cast(ing) surface fineness and the overall dimensional accuracy of production are also relatively poor.

The utility model content

The technical problem that the utility model will solve is: in order to overcome the problem that exists in above-mentioned, a kind of easily manufactured and precoated sand core shooter that casting accuracy is high is provided.

The utility model solves the technical scheme that its technical problem adopted: a kind of precoated sand core shooter; The precoated sand distributor that comprises the storage sand cylinder jar that is used to place precoated sand, is connected with the bottom of storage sand cylinder jar, be installed in core mold on the precoated sand distributor, rotation body that is used to regulate core mold and the electrothermal tube that is connected with core mold and the attemperating unit that is used to control the electrothermal tube temperature; Described core mold is coated with pressing plate on the top, is connected with rubber gasket between pressing plate and the core mold.

Described core mold is formed by left mould with the right mould that left mould is involutory; The inside that described left mould and right mould are combined to form has the inner canister of the pyramidal structure of open top and bottom lock; Has the cavity that can inject precoated sand between inner canister lateral wall and the left and right mould inner wall; Described cavity bottom has the L type connector that is connected with cavity, and filling precoated sand in the cavity of core mold, the furane resins on precoated sand surface are fused rapidly in 220 ℃ of mold heats; And form sand and sand facies bonding mutually, the control precoated sand polymerization through the time forms needed core.

The inner canister top diameter that described left mould and right mould are combined to form is less than bottom lock end diameter.

The beneficial effect of the precoated sand core shooter of the utility model is: adopt mechanized part to make film covered sand core; It is easily manufactured; The product of making has the intensity height, smooth surface, and advantages such as difficult absorption moisture are convenient to deposit; With use the clay-bonded sand moulding to compare casting qualified rate to be increased to 99% and improve moulding efficient 23% by original 93%, to alleviate labor strength.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of core mold among Fig. 1.

1. storage sand cylinder jars among the figure, 2. precoated sand distributor, 3. core mold, 31. left moulds, 32. right moulds, 33. inner canister, 34. cavitys, 4. rotation body, 5. electrothermal tube, 6. attemperating unit, 7. pressing plate, 8. rubber gasket.

The specific embodiment

Combine accompanying drawing that the utility model is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, the basic structure of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

Precoated sand core shooter as shown in Figure 1; The precoated sand distributor 2 that comprises the storage sand cylinder jar 1 that is used to place precoated sand, is connected with the bottom of storage sand cylinder jar 1, be installed in core mold 3 on the precoated sand distributor 2, rotation body 4 that is used to regulate core mold 3 and the electrothermal tube 5 that is connected with core mold 3 and the attemperating unit 6 that is used to control electrothermal tube 5 temperature; Core mold is coated with pressing plate 7 on 3 tops, is connected with rubber gasket 8 between pressing plate 7 and the core mold 3.

Precoated sand core shooter as shown in Figure 2; Core mold 3 is formed by left mould 31 with the right mould 32 that left mould 31 is involutory; The inside that left side mould 31 and right mould 32 are combined to form has the inner canister 33 of the pyramidal structure of open top and bottom lock; Inner canister 33 top diameters have the cavity 34 that can inject precoated sand less than bottom lock end diameter between inner canister 33 lateral walls and left and

right mould

31,32 inwalls, and cavity 34 bottoms have the L type connector 35 that is connected with cavity 34.

The core manufacturing craft flow process of the precoated sand core shooter of the utility model: the precoated sand of at first choosing through the constant weight proportioning (fineness of sand 70/140) adds in the storage sand cylinder jar 1; This moment, core mold 3 was heated to 220 ± 10 ℃; Precoated sand gets in the cavity 34 of core mold 3, and the precoated sand filling gets in the core mold 3, and the furane resins on precoated sand surface are fusion rapidly in 220 ℃ of hot core mold 3; And form sand and sand facies bonding mutually; At the same time to air inlets pressurization in the precoated sand distributor 2, air-pressure controlling is at 0.25Kpa, makes precoated sand firm time 30 seconds in core mold 3 (temperature is set 220 ± 10 ℃); Obtain the film covered sand core of pyramidal structure after left mould of core mold 3 31 and right mould opened in 32 minutes; Make it be cooled to normal temperature, after film covered sand core is cooled to certain normal temperature, carry out the film covered sand core appearance is rebuild; The inner chamber of film covered sand core carries out joining mould cast back foundry goods towards adventitia, moulding after inserting clay-bonded sand; The film covered sand core that this device fabrication is come out is mainly used in the anchor plate casting that the bridge construction prestress engineering uses, and its produced precoated sand has high strength, high temperature resistant, lowly gets angry, low bulk, good, the anti-stick grittiness of release property are good, can improve 2 grades of endoporus casting accuracy of anchor plate.

With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must confirm its technical scope according to the claim scope.

Claims

1. precoated sand core shooter; It is characterized in that: the precoated sand distributor (2) that comprises the storage sand cylinder jar (1) that is used to place precoated sand, is connected with the bottom of storage sand cylinder jar (1), be installed in core mold (3) on the precoated sand distributor (2), rotation body (4) that is used to regulate core mold (3) and the electrothermal tube (5) that is connected with core mold (3) and the attemperating unit (6) that is used to control electrothermal tube (5) temperature; Described core mold (3) is coated with pressing plate (7) on the top, is connected with rubber gasket (8) between pressing plate (7) and the core mold (3).

2. precoated sand core shooter according to claim 1; It is characterized in that: described core mold (3) is formed by left mould (31) with the right mould (32) that left mould (31) is involutory; The inside that described left mould (31) and right mould (32) are combined to form has the inner canister (33) of the pyramidal structure of open top and bottom lock; Have the cavity (34) that can inject precoated sand between inner canister (33) lateral wall and left and right mould (31, the 32) inwall, described cavity (34) bottom has the L type connector (35) that is connected with cavity (34).

3. precoated sand core shooter according to claim 2 is characterized in that: inner canister (33) top diameter that described left mould (31) and right mould (32) are combined to form is less than bottom lock end diameter.