CN205967293U - A feeder system for metal founding - Google Patents

Abstract

The utility model discloses a feeder system for metal founding includes: the feeder sleeve, it has smooth basal portion, top and the lateral wall between top and basal portion above the basal portion, wherein the lateral wall is discontinuous for the feeder sleeve is open on one side. It is smooth breaker core basically that the feeder system still includes, the breaker core has the hole of lining up it, the breaker core is installed in the telescopic opening of feeder side and the perpendicular to basal portion, and except the hole in the breaker core, the closed cavity who is used for holding the molten metal is injectd together to feeder sleeve pipe and breaker core. The feeder system provides the replacement scheme of feeder to the side of the standard that uses coordinately of watering in with. Through directly giving casting feeding (replacing via the flow gate), the amount of metal in the system reduces to the productivity has less waste and improving to some extent.

Description

Feeder system for metal casting

Technical field

This utility model is related to be suitable to feeder system used in the metal casting operation using casting mould.

Background technology

In typical casting process, the metal of melting is poured into the preformed mould cavity limiting cast shape Interior.However, reducing when the metal solidifies, lead to shrinkage cavity, thus leading to the unacceptable defect in final casting.This be Known problem in casting industry, and be integrated in mould during mould formation by using feeder sleeve or standpipe (punching press sleeve) or insert (insertion sleeve) to solve after mould formation.Each feeder sleeve provides empty with described mould Extra (typically closing) volume of chamber connection or cavity, so that motlten metal is also in feeder sleeve.? In solidification process, the motlten metal in feeder sleeve flow back in mould cavity to compensate the contraction of foundry goods.Importantly, Metal in feeder sleeve cavity keeps the melting of longer time than the metal in mould cavity, and therefore feeder sleeve is formed For high-insulation or more typically heat release to produce extra heat with motlten metal when contacting with retardation of curing.

Feeder sleeve can be located at the top of mould cavity (commonly known as " its top feed device "), or it can be located at mould The side (being referred to as " side feeder ") of tool cavity.In the preparation process of mould, its top feed device can be placed in die drawing So that they are with mould surface directly contact on the top horizontal surface of case.Alternatively, side feeder can be positioned on and will run System is connected to above the ingate of casting mold cavity, or is positioned at the top of feeder base portion and neck area, their all levels Be connected to mould cavity.Due to their different curing characteristicss and feed needs, steel casting is generally needed compared with iron castings To result in the need for the multiple standpipes having around foundry goods distribution from the shorter metal flow path of feeder.

Unwanted kish after in foundry goods solidification and founding materialses being removed, in feeder sleeve cavity Remain attached to foundry goods and must be removed.For the ease of removing kish, feeder sleeve cavity can be towards its base portion (that is, feeder sleeve by the end near mould cavity) is tapered into the design of commonly known as neck down sleeve.When violent Strong blow when being applied on kish, (this process is referred to as " striking will be close to separate at the weakest point of mould for it Fall ").The tiny floor space of foundry goods is desirable, to allow, feeder sleeve is positioned in foundry goods can be by adjacent spy Levy in the region of restriction.

Although feeder sleeve can be applied directly on the surface of casting mould cavity, they often combine charging Device element (also referred to as breaker core) uses.Breaker core is only the fire resisting being located between mould cavity and feeder sleeve The disk of material core of the core of resin bonding or ceramic core or feeder bush material (typically), it has generally intracardiac wherein Hole.It is designed to that (it is not necessarily and is tapered into boring less than feeder barrel bore by the diameter in the hole of breaker core Shape) diameter so that near cast(ing) surface breaker core at knocking out.In order to assist further to knock out, breaker core Hole by being formed certain profile so that it forms V-arrangement recess in metal feeder cervical region.

There is size limitation so that height is insufficient to set in the shaping box that mould may be prepared in some cases wherein Top set portion feeder.Additionally, some mould patterns do not have feeder may be provided at upper planar surface thereon.Although using Ingate or side feeder avoid and need flat upper surface on mould pattern, but ingate increase mould cavity and The distance between feeder sleeve, and therefore increase required amount of metal.

This utility model considers these problems in design.

Utility model content

According to of the present utility model in a first aspect, providing a kind of feeder system for metal casting, it includes：

Feeder sleeve, it has planar base portion, the top above base portion and the side wall between top and base portion, Wherein said side wall is discontinuous so that feeder sleeve is open on side；With

Substantially flat breaker core, it has insertion hole therein, and breaker core is arranged on feeder sleeve In open side and perpendicular to base portion, in addition in the hole in breaker core, feeder sleeve pipe limits use together with breaker core In the closed cavity accommodating motlten metal.

Feeder system of the present utility model is side feeder, and planar base portion allows feeder system preparing mould Position near mould pattern during tool.The general planar structure of the breaker core that side is installed means that feeder system can It is positioned to the flat vertical side directly contact with mould pattern.When mould pattern is removed, the hole of breaker core with described Mould cavity directly contact.Feeder system of the present utility model therefore provides the standard side-fed being used together with ingate The replacement scheme of device.By directly to casting charging (replacing via ingate), amount of metal in systems reduces.Just because of such as , there is less waste in this and yield increases.

Feeder sleeve can be any suitably sized or shape.In certain embodiments, feeder sleeve is transversal Face is substantially rectangular or square.The side wall of feeder sleeve extends around the periphery of base portion.Therefore, described feeder wherein The cross section of sleeve is substantially rectangular or foursquare embodiment in it should be appreciated that feeder sleeve include substantially rectangular Or the base portion of positive aspect.Side wall can extend around three sides of square or rectangle, and Article 4 side is made up of breaker core.Cause This side wall may include two relative side sections and the rear portion section between the section of side, described rear portion section and spacer type Core is relatively.Side section and rear portion section may be integrally formed, or side wall can be by three lists combining in its edge Only section is formed.

In certain embodiments, the cross section of feeder system is generally D-shaped.In other words, feeder system has three Individual flat side (one of them is formed by breaker core) and the side of a bending.In certain embodiments, feeder set The side wall of cylinder has two relative side sections and the rear portion section between the section of side, described rear portion section and spacer type Relatively, wherein said rear portion section is bending (evagination) to core.

Advantageously, between side wall and base portion, or the bottom corners being formed between side wall, breaker core and base portion are permissible It is foursquare or slightly angled.If foursquare or angled turning is preferably as turning excessively sphering, During preparing mould, sand can not be filled effectively in the following of feeder system, thus leading to potential foundry goods to lack Fall into.

In certain embodiments, top and side wall form.Alternatively, side wall and top are separable, that is, push up Portion is a lid.Top can be flat-top, inclination, (the such as evagination) of bending, dome, part dome, put down Tip circle top, or any other suitable shape.The top of feeder system can be closing so that described cavity has been Totally enclosed, in addition to the hole in breaker core.

WILLIAMS-DARLING Ton wedge (Williams Wedge) is may include in feeder sleeve.It can be insert or preferred The unitary members being formed in the forming process of sleeve, and include the prism shape on described sleeve inner top. In casting when sleeve is filled motlten metal, the edge of WILLIAMS-DARLING Ton wedge guarantees that the air of molten metal surface penetrates And discharge the vacuum action within feeder to allow more consistent charging.

Any suitable hot-face insulation that feeder sleeve of the present utility model can be formed from it by known feeder and/ Or exothermic material or compositionss form or include above-mentioned material or compositionss.Those skilled in the art are possible to selection and are suitable to The suitable material of each particular requirement.The property of feeder bush material has no particular limits, and for example it can be exhausted Edge, heat release or a combination of both.Its manufacturing mode is not specifically limited, its for example can using vacuum forming process or Core is penetrated method to manufacture.Typically, feeder sleeve is from low and Monofrax filler (such as silica sand, olivine, aluminum-silicon Hydrochlorate tiny balloon and fiber, fire clay, aluminium oxide, Pumex, perlite, Vermiculitum) and the mixture of bonding agent make.Heat release Sleeve needs further exist for fuel (typically aluminum or aluminum alloy), oxidant (typically ferrum oxide, manganese dioxide, or potassium nitrate) and Common initiator/sensitizer (typically cryolite).

Feeder sleeve can be formed by any known method forming feeder, such as around precursor with outside mould By being vacuum formed the slurry of bush material in tool, it is subsequently heated sleeve to go eliminating water and to harden or curing materials.Alternatively, enter Glassware sleeve by punching press in core box or can blow material (method penetrated by core), and logical via being advanced by reacting gas or catalyst Cross sleeve and solidify bonding agent solidifying sleeve, or to apply heat by using heated core box, or by removing sleeve And be thermally formed in drying box.Suitable feeder compositionss are for example included by Foseco with trade name KALMIN and KALMINEX Sell be made up of slurry and the core method of penetrating those.

The density of feeder sleeve depends on composition and manufacture method.In certain embodiments, the density of feeder Less than 1.5 grams per cubic centimters, less than 1.0 grams per cubic centimters or less than 0.7 grams per cubic centimter.In certain embodiments, feeder Density be from 0.8 to 1.0 grams per cubic centimter or from 0.5 to 0.7 grams per cubic centimter.

Breaker core is designed to reduce feeder to the contact area of foundry goods, and can will be typically based on silicon dioxide or have When also have chromite sand, be blown in heated core box by the sand coating novolac resin to allow resin to melt Harmonious and happy after-hardening (Croning process) is made.Alternatively, breaker core can be by the one-tenth of extremely fireproof ceramic material or such as steel plate Shape metal is made.

The thickness of breaker core will depend partially on the size of feeder, and typical sand breaker core will have The thickness of 8 to 15 millimeter magnitudes, and firmer ceramic breaker core is generally had the thickness for 5 to 10 millimeters.Spacer type Core is arranged on feeder sleeve, and is fixed by being usually the bonding agent of PUR.

Breaker core has hole (opening boring), and it positions near the base portion of feeder system in certain embodiments.Should Hole provides passage to the motlten metal from feeder system cavity to mould cavity so that when foundry goods cooling and contraction to casting Part feeds.The positions and dimensions in hole can select according to the geometry of foundry goods and feed needs.This hole can towards or be adjacent to The base portion of feeder system positions so that motlten metal can be flowed in mould cavity under the influence of gravity.In some enforcements In example, hole is centrally positioned on the longitudinal axis of described breaker core.Alternatively, described hole can be with respect to described breaker core Longitudinal axis orthogonal skew (to the right or to the left).It should be appreciated that providing the metal maximum height for charging, because This hole by breaker core low land positioning as far as possible typically desirable.This also minimizes the disabled of the metal less than hole Reservoir.

The maximum gauge that the diameter in hole can be equivalent to cavity (is surveyed in the plane perpendicular to the longitudinal axis of feeder system ).In one embodiment, the diameter in hole is less than the 40%, 30%, 20%, 15% or 10% of cavity maximum gauge.

Breaker core may make up the whole wall of feeder system so that the maximum height of described breaker core and feeder set The maximum height of cylinder is identical.

In certain embodiments, feeder system has from the surface of breaker core to relative with breaker core and at two Length A measured by from outside of the rear portion section between the section of side, described length is measured to maximum curvature point, wherein institute State rear portion section be bending or D-shaped, and the width recording in outside between two side sections of feeder be from 0.4 × A to 2 × A.In certain embodiments, described feeder system has the maximum height from 1 × A to 3 × A, and it depends on Casting dimension and sleeve require will be generally in the range of from 8 centimetres to 25 centimetres or more.

A kind of process of the horizontally separated mould being used for metal casting for preparation, it includes：

Take the upper part (upper mould) to limit required casting cavity for the pattern plate being provided with shaping dies pattern, and have There are the flat surfaces of at least one level of the vertical surface being adjacent to mould pattern；

The feeder system of this utility model first aspect is placed in horizontal planar surface so that including the partition in hole At least a portion of core is concordant with the vertical surface of mould pattern；

With founding materialses around mould pattern and feeder system；

Compacting founding materialses；

Mould pattern and pattern plate are removed to form top half (mould) mould from compacting material；

Prepare the latter half (dragging) mould in the way of similar to upper die mold in the case of not using feeder system Tool；With

Upper mold half is placed on the top of lower mold half to cast.

Therefore it will be appreciated that mould is horizontally separated.

In use, feeder system is placed on a horizontal surface near mould pattern.The planar base portion of feeder system Meaning that it is self-supporting, so not needing extra supporting construction, and there is no founding materialses under feeder system. Pattern plate and mould pattern are removed from the founding materialses of described compacting and leaves mould cavity, it has the contrary shape of mould pattern Shape, wherein feeder system are embedded in founding materialses.Because breaker core is substantially flat, preparing the process of mould In it is shelved against mould pattern, and when removing mould pattern, the hole of breaker core and casting cavity directly contact.Pass through Reduce the distance between cavity and foundry goods of feeder system, feeder system is being reduced when finished product cast removes old metal Amount.

Founding materialses can be molding sand.As known in the art, molding sand may be logically divided into two primary categories；Chemistry (based on the organic or inorganic bonding agent) of bonding or splicing clay.The molding sand bonding agent of chemical adhesive is typically from solidity system System, wherein bonding agent and chemical hardening agent are mixed with sand, and bonding agent and sclerosing agent immediately begin to react, but sufficient slowly enough To allow sand to shape around pattern plate, then allow sufficiently to harden to remove and to cast.The formation system of splicing clay Clay and water are used as bonding agent, and can " green " or undried state use, and be commonly known as greensand.Wet Sand mixture be individually not easy under compressive force to flow or not easily moveable so that compacting around the molding sand of pattern and gives mould Enough strength characters, jolt, vibrate, extruding and punching press various combinations be applied to produce with high productivity ratio uniformly strong The mould of degree.

Formed in mould way is it is well known that and for example in Foseco Ferrous Foundryman ' s Described in Handbook (ISBN 075064284X).Be referred to as from hard or cold curing process canonical process be by sand with Liquid resin or silicate bonding agent are admixed together together with suitable catalyst, typically in continuous mixing device.After mixing Sand then pass through to be compacted the combination of vibration and punching press around pattern, then stand, during this period, catalyst start with viscous Connect the hardening that agent reaction leads to sand mixture.When mould reaches steerable intensity, it is removed from pattern, and continue Hardening completes until chemical reaction.

Founding materialses can be by the sand from hard cold curing process bonding, and it includes liquid adhesive such as acid solidification Furan or phenolic resin, ester solidification alkalescent phenol resin or sodium silicate bonding agent together with suitable catalyst.Standby Selection of land, founding materialses are the sands (greensand) of splicing clay, it include such as sodium or calcium bentonite clay, water and such as coal dust and The mixture of other additives of corn bonding agent.

Brief description

Will refer only to now accompanying drawing and describe embodiment of the present utility model by way of example, wherein：

Fig. 1 is the perspective view of the feeder system according to this utility model embodiment.

Fig. 2 is the back perspective view of the feeder system according to another embodiment of this utility model.

Fig. 3 is the schematic diagram of the feeder system according to one embodiment of this utility model.

Fig. 4 a is according to feeder system of the present utility model used in preparing casting mould process.

Fig. 4 b is to use during casting metallic article according to feeder system of the present utility model.

Specific embodiment

With reference to Fig. 1, the feeder system 100 according to this utility model first aspect is shown, it includes feeder sleeve 102 With breaker core 104.Feeder sleeve 102 includes planar base portion 106, the top 108 of base portion 106 top and at top 108 The side wall 110 extending and base portion 106 between.

The side wall 110 of feeder sleeve 102 extends around the periphery of base portion 106, and is discontinuous so that feeder Sleeve 102 is in side upper shed.Base portion 106 substantially rectangular in shape or foursquare so that feeder sleeve 102 transversal Face is substantially rectangular or foursquare.Top 108 is bent in the way of evagination.In other embodiments (not shown), top 108 Can be flat-top, tilt, dome, part dome, flat-top dome or any other suitable shape.

Side wall 110 extends around three sides of base portion 106.Side wall 110 includes two relative side sections 112 and side Rear portion section (invisible) between facial section 112, described rear portion section is relative with the open side of feeder sleeve 102.Side Section 112 and rear portion section and top form.In other embodiments, side wall 110 can be by three sides at them The single section combining at edge and/or side wall 110 is formed, and top 108 can be separable, wherein top 108 is the form of lid.

Breaker core 104 be substantially flat, and be arranged on feeder sleeve 102 by bonding agent so that every Slab core 104 constitutes the 4th side of feeder sleeve 102.Breaker core 104 is installed with respect to the rear portion section of side wall 110, And extend between the base portion 106 in feeder sleeve 102 and top 108.The maximum height of breaker core 104 and feeder set The maximum height of cylinder 102 is identical so that described breaker core 104 and feeder sleeve 102 are fully enclosed in feeder system Cavity in system 100.Between the side wall 110 and base portion 106 of feeder system 100 or in side wall 110, breaker core 104 and The base portion turning 116 being formed between base portion 106 is foursquare or slightly angled.

Breaker core 104 has the hole 118 of base portion 106 positioning of close feeder system 100.Hole 118 is with respect to partition The longitudinal axis skew of core 104.In other embodiments, hole 118 can be centrally placed on the longitudinal axis of breaker core 104.

Feeder sleeve 102 can be formed by any suitable refractory insulating material and/or exothermic material.Breaker core 104 Can be formed by the silica sand of any suitable extremely fireproof material such as bonding.

With reference to Fig. 2, another embodiment of feeder system 200 substantially identical to those shown in Fig. 1 is shown, but has D-shaped cross-section.The base portion 202 of feeder system 200 is generally D-shaped.The rear portion of the side wall 206 relative with breaker core 208 Section 204 is spirogyrate bending, and includes the groove 212 being centered about.The top 210 of feeder system 200 is partly to justify Top shape.Side wall 206 and top 210 form.

With reference to Fig. 3, the schematic diagram of the feeder system according to this utility model first aspect is shown.In some embodiments In, feeder system has from the surface of breaker core to relative with breaker core and two side sections posterior The length (L) of A measured by from outside for the section, the maximum point of linear measure longimetry to curvature, wherein rear portion section are bending or D-shaped , and the width (W) recording from outside between two side sections of feeder is from 0.4 × A to 2 × A.Real at some Apply in example, the maximum height that feeder system has is from 1 × A to 3 × A, it depends on casting dimension and sleeve requires to lead to In the range of 8 centimetres to 25 centimetres of Chang Cong or more.

Reference picture 4a, illustrates mold half molectron, and it includes two feeders according to this utility model first aspect System 100 and mould pattern 402, feeder system 100 and mould pattern 402 are positioned on level view chopping board 404.Feeder system The base portion 106 of system 100 keeps flat against the horizontal planar surface of pattern plate 404.The breaker core 104 of feeder system 100 is neighbouring Position so that at least a portion including the breaker core 104 in hole 118 is vertical against mould pattern 402 in mould pattern 402 Surface alignment and with described vertical surface directly contact.One or more its top feed device system (not shown) are alternatively positioned at mould On one or more horizontal surfaces of tool pattern 402.

During the mould being used for metal casting for preparation, mould pattern 402 and feeder system 100 are with casting Material 408 around.Founding materialses 408 are compacted and harden around mould pattern 402 and feeder system 100.Pattern plate 404 He Mould pattern 402 removes from the founding materialses 408 being compacted, and leaves mold half cavity 410a (referring to Fig. 4 b), and it is mould The negative shape of pattern 402, feeder system 100 holding simultaneously is embedded in the founding materialses 408 being compacted.

Reference picture 4b, illustrates to assemble and prepare the mould 412 for casting.Mould 412 include upper mold portion (on Mould) 414a, the mold assemblies shown in Fig. 4 a are formed, and Lower mold portion (dragging) 414b, shape in a similar manner Become, but there is no feeder system.Upper die mold 414a and lower mould mould 414b is by down gate 416, flow passage system 418 and ingate 420 formation.Mold half cavity 410a and 410b constitutes mould cavity, and wherein, line X----X represents the horizontally separated line of mould. The breaker core 104 of feeder system 100 is directly connected with described mould cavity.

During metal casting, motlten metal passes through flow passage system 418 via down gate 416 and ingate 420 inclines Pour into casting mould 412.Motlten metal is then filled with mould or casting cavity 410, and also by the hole in breaker core 104 118 entrance feeder systems 100.When the metal-cured and contraction in mould cavity 410, the melting in feeder sleeve 102 Metal is flow back in mould cavity 410 by hole 118, to compensate contraction, and guarantees foundry goods filled up completely with mould cavity during cooling 410.In breaker core 104, the positioning near the hole 118 of base portion 106 of feeder sleeve 102 can ensure that the enlarged head of metal It is stored in the feeder sleeve 102 of hole 118 top.Metal head above hole 118 produces enough metal static pressures, To enable motlten metal to flow in mould cavity 410 when foundry goods solidifies.Hole 118 near base portion 106 positioning also The unavailable reservoir of metal below hole 118 for littleization, thus reduce waste.

Claims (11)

1. a kind of feeder system for metal casting, it includes：

Feeder sleeve, it has flat base portion, the top above described base portion and in described top and described base portion Between side wall, wherein said side wall is discontinuous so that described feeder sleeve is open in an open side；With

Breaker core, described breaker core is substantially flat and has insertion hole therein, and described breaker core is arranged on In one open side of described feeder sleeve and perpendicular to described base portion, except in addition to the described hole in described breaker core, Described feeder sleeve pipe limits the closed cavity for accommodating motlten metal together with described breaker core.

2. the feeder system for metal casting according to claim 1 is it is characterised in that described feeder system Cross section is substantially rectangular.

3. the feeder system for metal casting according to claim 1 is it is characterised in that described feeder system Cross section is generally D-shaped.

4. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that pass through institute State the described hole of breaker core towards the described base portion of described feeder sleeve or the described base being adjacent to described feeder sleeve Portion positions.

5. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that described hole It is centrally positioned on the longitudinal axis of described breaker core.

6. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that described hole Longitudinal axis skew from described breaker core.

7. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that described top Portion is to tilt or bending.

8. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that be located at institute State and WILLIAMS-DARLING Ton wedge is existed on the described top of feeder sleeve inner.

9. the feeder system for metal casting according to any one of claims 1 to 3 is it is characterised in that described The bottom corners being formed between side wall and described base portion or between described side wall, described breaker core and described base portion are about Foursquare.

10. the feeder system for metal casting according to any one of claims 1 to 3 it is characterised in that described every The maximum height of slab core is identical with the maximum height of described feeder sleeve.

11. feeder systems for metal casting according to any one of claims 1 to 3 it is characterised in that have for The length of A, the width from 0.4 × A to 2 × A, and the height from 1 × A to 3 × A.