CN101850402A

CN101850402A - Lost foam casting method for statues and artworks

Info

Publication number: CN101850402A
Application number: CN200910011007A
Authority: CN
Inventors: 石宏
Original assignee: SHENYANG LITAI AUTOCONTROL TECHNOLOGY Co Ltd
Current assignee: SHENYANG LITAI AUTOCONTROL TECHNOLOGY Co Ltd
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2010-10-06

Abstract

The invention relates to a lost foam casting method for statues and artworks. A master mould is divided into a plurality of sand moulds, the sand moulds are then bonded together by bonder to form a whole sand mould, fireproof coating is brushed on the inner wall of the sand mould, and plastic foam boards are laid in the whole sand mould, and are stuck on the sand mould by non-setting adhesive tapes. A casting head is arranged, sand is filled around for fixation, a casting mould is placed in a pit or a flask, resin sand is filled inside and outside, the periphery of the mould is fixed by the sand, a sand core is in the mould, a side gate and an in-gate in the casting head, which are made of plastic foam, are buried in the filling sand and communicated with a direct gate, molten metal is injected into the direct gate, the plastic foam is burnt and gasified to disappear, the molten metal is filled in the mould cavity, and after solidification, a cast artwork like the master mould is produced. Statures and artworks cast by the method are lifelike, various artworks in existence can be imitated, damaged complex mechanical parts or complex mechanical parts to be replaced can be quickly imitated, the surfaces of castings and artworks are smooth, metal can be saved, and the cost can be reduced.

Description

Lost foam casting statue and handicraft method

Technical field

The present invention relates to lost-foam casting method, particularly relate to lost foam casting statue and handicraft method.

Background technology

Lost foam casting is the bonding model that is combined into of the identical foamed plastics of casting dimension geometry, be embedded in the moulding sand, make bubble mould combustion gasification with the high-temperature liquid metal cast, molten metal occupies bubble moulding model position, solidify and form foundry goods, with its dimensional accuracy height, any surface finish, profile is true to nature, characteristics clearly in the line, more traditional casting method is made, and has powerful superiority, and adopting lost foam casting statue and handicraft is the another innovation of casting method.

Summary of the invention

The technical problem to be solved in the present invention, it is true to nature to provide a kind of profiling, any surface finish, wall thickness and even cavity structure are saved metal, the lost foam casting statue that reduces cost and the method for handicraft.

The technical scheme that adopts is:

Lost foam casting statue and handicraft method, its step is as follows:

Step 1: make parent form

With clay sculpture be engraved as figure statue or handicraft as parent form, also can use existing statue and handicraft as parent form.

Step 2: make sand mold

1. make sand mold according to the appearance profile piecemeal of parent form, at first the talc slurry of the demoulding is convenient in brushing on parent form, to be dried after, adopt modern resin sand technology to divide polylith molding resins sand self-curing mo(u)ld on parent form.

2. with the polylith resin bonded sand mould from the parent form type, adopt binding agent with whole sand mold of the bonding one-tenth of polylith resin bonded sand mould again, sand mold inwall brushing fireproof coating and the oven dry.

Step 3: paving plastic foamboard in whole sand mold

According to statue and the handicraft wall thickness set, adopt the plastic foamboard of same thickness to stick on the sand mold internal chamber wall, cement on the sand mold with cloth drygum paper band, equally the mutual joint of plastic foamboard is cemented with cloth drygum paper band.

Step 4: enclose sand and dead head is set

1. the whole sand mold that stickup is finished is put into sandbox or melt pit, casting resin sand and tamping in whole sand mold outside and inner chamber, and type is fixed for enclosing sand outward, is core in the type.

2. be provided with and water prosperous mouthful, ingate and runner gate adopt foam molding, direct current mouth and rising head adopt and water prosperous mouthful of excellent moulding, ingate made from foamed plastics and runner gate are when casting resin sand, put on the plastic foamboard that is attempted by the sand mold inner chamber by the position of setting, gate stick places desired location and gate stick to be connected with runner gate with the rising head rod, and rising head rod lower end connects the plastic foamboard upper end, is embedded in the sand with potting resin sand.

3. after treating the resin sand sclerosis, extract gate stick and form down gate, extract prosperous mouthful of clavate and become prosperous mouthful.

Step 5: cast

Molten metal liquid is poured into from down gate, plastic foamboard combustion gasification and disappearing, the molten metal filling copies the casting technique product the same with parent form after solidifying in die cavity.

Statue that the present invention casts out and handicraft profiling are true to nature, can copy existing various handicraft, and can make damage fast maybe needs the complex machines part that changes, and its foundry goods, handicraft surface are bright and clean, and the wall thin and thick is even, saves metal, reduces cost.

Description of drawings

Fig. 1 is a casting technique schematic diagram of the present invention.

The specific embodiment

Embodiment

This example disappearance die casting copper lion handicraft, its weight reaches three tons, adopts the tin bronze casting.

1, make master mold, select for use clay sculpture to become lion shape, making formpiston with resin again is described master mold.

2, make sand mold

1. make sand mold according to the appearance profile piecemeal of parent form, the talc slurry of the demoulding is convenient in brushing on parent form, to be dried after, adopt modern resin sand technology to divide polylith molding resins sand self-curing mo(u)ld on parent form.

3, paving plastic foamboard in whole sand mold

According to the lion 8mm wall thickness of being cast, adopt the foam pigment plate 7 of same 8mm thickness to stick on the sand mold internal chamber wall, equally plastic foamboard 7 mutual joints are cemented with cloth drygum paper band.

4, enclose sand and dead head is set

The lion sand mold head that 1. will paste plastic foamboard places in the melt pit 1, and sandbox 2 is set on the melt pit, and potting resin sand (floor sand) tamping of sand mold outside is enclosed sand and fixed.

2. dead head is set, ingate 6 and runner gate 5 adopt foamed plastics to make by the design section size, down gate 4 and rising head 3 adopt the moulding of dead head rod, in type, place gate stick in the potting resin sand, divide three layers and put foamed plastics runner gate 5 and ingate 6, runner gate 5 is connected with gate stick, and ingate 6 two ends connect runner gate 5 and plastic foamboard 7 respectively, the rising head rod is located at its lower end, sand mold upper end and connects plastic foamboard 7, is embedded in the sand with potting resin sand.

3. after treating the resin sand sclerosis, extract gate stick and form down gate 4, extract the rising head clavate and become rising head 3, return running gate system at the bottom of the formation staged.

5, cast

The copper molten metal of fusing is poured into from down gate 4, plastic foamboard 7 combustion gasifications and disappearing, the molten metal filling copies the casting copper lion the same with parent form after solidifying in die cavity.

Claims

1. lost foam casting statue and handicraft method is characterized in that comprising the following steps:

Step 1: make parent form

With clay sculpture be engraved as figure statue or handicraft as parent form, also can use existing statue and handicraft as parent form;

Step 2: make sand mold

1. make sand mold according to the appearance profile piecemeal of parent form, at first the talc slurry of the demoulding is convenient in brushing on parent form, to be dried after, adopt modern resin sand technology to divide polylith molding resins sand self-curing mo(u)ld on parent form;

2. with the polylith resin bonded sand mould from the parent form type, adopt binding agent with whole sand mold of the bonding one-tenth of polylith resin bonded sand mould again, sand mold inwall brushing fireproof coating and the oven dry;

Step 3: paving plastic foamboard in whole sand mold

According to statue and the handicraft wall thickness set, adopt sticking the applying on the sand mold internal chamber wall of plastic foamboard (7) of same thickness, cement on the sand mold with cloth drygum paper band, equally the mutual joint of plastic foamboard (7) is cemented with cloth drygum paper band;

Step 4: enclose sand and dead head is set

1. the whole sand mold that stickup is finished is put into sandbox (2) or melt pit (1), casting resin sand and tamping in whole sand mold outside and inner chamber, and type is fixed for enclosing sand outward, is core in the type;

2. be provided with and water prosperous mouthful, ingate (6) and runner gate (5) adopt foam molding, down gate (4) and rising head (3) adopt the moulding of dead head rod, ingate made from foamed plastics (6) and runner gate (5) are when casting resin sand, put on the plastic foamboard (7) that is attempted by the sand mold inner chamber by the position of setting, gate stick and rising head rod place desired location, and gate stick is connected with runner gate (5), and rising head rod lower end connects plastic foamboard (7) upper end;

3. after treating the resin sand sclerosis, extract gate stick and form down gate (4), extract the rising head clavate and become rising head (3);

Step 5: cast

Molten metal liquid is poured into from down gate (4), plastic foamboard (7) combustion gasification and disappearing, the molten metal filling copies the casting technique product the same with parent form after solidifying in die cavity.