CN205519490U - Magnesium iron abrasive disc sand mould casting mould - Google Patents

Abstract

The embodiment of the utility model discloses magnesium iron abrasive disc sand mould casting mould through following the mode that thin cyclic annular flow gate was placed by foundry goods center hole edge, makes molten iron from the outside all -round type that evenly fills in lining, and approaching cyclic annular exhaust overflow mouth in the design of foundry goods outer fringe, the assurance flow gate can be fulfiled ahead of schedule before the foundry goods begins to solidify in a large number with the overflow mouth that exhausts and solidify, and at the pouring in -process, adopts large -traffic water, earlier fast back slow and water expire after the technology step of teeming again. Above -mentioned technology effectively utilize graphitization expanding property that the molten iron solidifies the in -process realize the foundry goods from the feeding, the solidification shrinkage at abundant balanced each position of feeding foundry goods, reach the foundry goods inside, especially the working face region have higher density and does not have the technology requirements for quality that defect such as sediment was pressed from both sides to the shrinkage porosite, effectively improve the product rate and the qualification rate of abrasive disc, in addition, through the sand casting abrasive disc, have that technology is simple and convenient, high productivity and low characteristics of energy consumption cost, easily extensively promote.

Description

A kind of magnesium iron abrasive disk sand mold type molds

Technical field

The utility model relates to magnesium iron abrasive disk production technical field, particularly relates to a kind of magnesium iron abrasive disk sand mold type molds.

Background technology

At the production industry of high-grade crystal film sheet that is thinning and that grind the material such as synthetic sapphire and crystal, twin grinder The upper general high-end cast iron abrasive disk using Nodular cast iron material.In order to ensure thinning with process of lapping in, reduce because The problem that the uneven wear of abrasive disk working face causes the crystal film sheet being ground to occur crushing occurs, and ensures Grinding Quality, to working face difference of hardness, the consistency of abrasive disk and has the highest requirement without shrinkage porosite dreg defect etc..

Production technology is simple, casting expense reasonably tradition Sand Moulding Process produces high-end magnesium iron using casting producer at present Abrasive disk product, is typically all and uses abrasive disk foundry goods horizontal, arranges that at the edge of cylindrical pouring technology system and feeding emit The horizontal casting technique of mouth.The basic engineering size range of various model magnesium iron abrasive disks: outside diameter * thickness=(￠ 200～ 2000) * (10～60) millimeter, casts modulus≤2.5 centimetre, and process structure belongs to thin flat plate disc-like foundry goods.This kind of casting Part uses sand mold flat casting process method, and the solidification shrinkage fully being equalized each position of feeding foundry goods by edge rising head is the most tired Difficult；What the graphitization expansion phenomenon of During Solidification of S. G. Cast Iron caused first rise, and retraction coagulating property the most greatly reduces edge The ability of rising head feeding comprehensive to foundry goods.And, in above-mentioned horizontal casting technique, each spot temperature in card temperature field is not Uniformly, the temperature difference makes more greatly the difference of hardness of abrasive disk working face the biggest, it is impossible to meet working face difference of hardness≤Brinell hardness The technology requirement of HB ± 5.Therefore, cast-internal to be reached, particularly working face region have and have standard compliant hardness Difference, higher-density and the processing quality without defects such as shrinkage porosite slag inclusions require highly difficult, how to ensure the yield rate of abrasive disk It is that those skilled in the art need badly and solve the technical problem that with qualification rate.

Utility model content

The utility model embodiment provides a kind of magnesium iron abrasive disk sand mold type molds, to solve high-end ball of the prior art Iron abrasive disk yield rate and the low problem of qualification rate.

In order to solve above-mentioned technical problem, the utility model embodiment discloses following technical scheme:

The utility model embodiment discloses a kind of magnesium iron abrasive disk sand mold type molds, including upper sand mold and lower sand mold, wherein:

Described upper sand mold and described lower sand mold are mutually matched and are buckled into foundry goods die cavity；

Described upper sand mold includes sprue, cup and steam vent, wherein:

Described sprue is arranged at the center of described upper sand mold and runs through described upper sand mold；

Described cup is arranged at the top of described sprue and is connected with described sprue；

Described steam vent runs through described upper sand mold and the periphery near described upper sand mold；

Described lower sand mold includes flat ring shape ingate, unhurried current socket and overflow insulation ring, wherein:

Described unhurried current socket is arranged at the correspondence position bottom described sprue；

Described flat ring shape ingate periphery bottom described sprue is connected with described sprue, and pouring molten iron is led to Cross described flat ring shape ingate and enter described foundry goods die cavity from described sprue；

Described overflow insulation ring is arranged at the periphery of described foundry goods die cavity, and the top of described overflow insulation ring and described exhaust Hole is connected, side is connected with described foundry goods die cavity by exhaustion spill mouth, and the bottom surface of described overflow insulation ring and institute The lower inner bottom surface stating exhaustion spill mouth is concordant；

The thickness of described exhaustion spill mouth is less than the thickness of described flat ring shape ingate.

Preferably, described flat ring shape ingate be arranged at inward flange correspondence position under described foundry goods die cavity, described exhaust overflow Head piece is arranged at described foundry goods die cavity upper outside edge correspondence position.

Preferably, described magnesium iron abrasive disk sand mold type molds includes multiple steam vent, and described steam vent is incubated along described overflow Circle top is uniformly distributed.

Preferably, the end face of described overflow insulation ring is higher than the end face of described foundry goods die cavity.

Preferably, the thickness of described flat ring shape ingate is 8-12mm.

Preferably, the thickness of described exhaustion spill mouth is 6-10mm.

Preferably, described cup includes that refractory nozzle cup, described sprue include earthen-ware pipe sprue.

From above technical scheme, the magnesium iron abrasive disk sand mold type molds that the utility model embodiment provides, including upper sand mold It is mutually matched is buckled into foundry goods die cavity with lower sand mold, described upper sand mold and described lower sand mold；Described upper sand mold include sprue, Cup and steam vent, wherein said sprue is arranged at the center of sand mold and runs through described upper sand mold；Described water Cup is arranged at the top of described sprue and is connected with described sprue；Described steam vent run through described upper sand mold and Periphery near described upper sand mold；Described lower sand mold includes flow slowly socket, flat ring shape ingate and overflow insulation ring, institute State unhurried current socket and be arranged at the correspondence position bottom described sprue；Described flat ring shape ingate is bottom described sprue Periphery be connected with described sprue；Described overflow insulation ring is arranged at the periphery of described foundry goods die cavity, and described overflow The top of insulation ring is connected with described steam vent, side is connected with described foundry goods die cavity by exhaustion spill mouth, and institute The bottom surface stating overflow insulation ring is concordant with the lower inner bottom surface of described exhaustion spill mouth.The thickness of described exhaustion spill mouth is less than institute State the thickness of flat ring shape ingate.Described foundry goods casting mold is by using described flat ring shape ingate, and pouring molten iron is from sprue Shape is filled, it is ensured that foundry goods all directions uniform distribution of temperature field along described flat ring shape ingate Omnibearing even inside-out；And, Described foundry goods die cavity periphery also can be designed with that downwardly extend, that separate, independent ring-type overflow insulation ring with sand mold, profit It is incubated with the high temperature liquid iron of overflow, reduces foundry goods inner edge and the temperature contrast of outer rim further, meet high-quality abrasive disk Requirement to difference of hardness；It addition, by ensureing that exhaustion spill mouth and described flat ring shape ingate around setting can shift to an earlier date Solidification, utilizes the graphitization expansion feature of During Solidification of S. G. Cast Iron to do from feeding, fully equalizes each position of feeding foundry goods Solidification shrinkage, reaching cast-internal, particularly working face region has higher-density and the work without defects such as shrinkage porosite slag inclusions Skill quality requirement, is effectively improved castability and the yield rate of abrasive disk.It addition, by sand casting abrasive disk, have The feature that simple process, productivity ratio are high and energy consumption cost expense is low, it is easy to be widely popularized.

Accompanying drawing explanation

In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will to embodiment or In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, for ordinary skill people For Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The structural representation of a kind of magnesium iron abrasive disk sand mold type molds that Fig. 1 provides for the utility model embodiment；

The plan structure schematic diagram of a kind of magnesium iron abrasive disk sand mold type molds that Fig. 2 provides for the utility model embodiment；

The flow process signal of a kind of magnesium iron abrasive disk sand mold non-feedhead casting process that Fig. 3 provides for the utility model embodiment Figure；

The flow process signal of the another kind of magnesium iron abrasive disk sand mold non-feedhead casting process that Fig. 4 provides for the utility model embodiment Figure；

A kind of schematic flow sheet pouring into a mould flow speed method of adjustment that Fig. 5 provides for the utility model embodiment；

The flow process signal of another magnesium iron abrasive disk sand mold non-feedhead casting process that Fig. 6 provides for the utility model embodiment Figure；

The symbol table of Fig. 1-2 is shown as:

The upper sand mold of 1-, 11-sprue, 12-cup, 13-steam vent, sand mold under 2-, 21-flows slowly socket, and 22-puts down Ring-type ingate, 23-overflow insulation ring, 24-exhaustion spill mouth, 3-foundry goods die cavity.

Detailed description of the invention

For the technical scheme making those skilled in the art be more fully understood that in the utility model, below in conjunction with this practicality Accompanying drawing in new embodiment, is clearly and completely described the technical scheme in the utility model embodiment, it is clear that Described embodiment is only a part of embodiment of the utility model rather than whole embodiments.New based on this practicality Embodiment in type, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise Execute example, all should belong to the scope of the utility model protection.

See Fig. 1, for the structural representation of a kind of magnesium iron abrasive disk sand mold type molds that the utility model embodiment provides, institute State abrasive disk casting pattern and include sand mold 1 and lower sand mold 2；Described upper sand mold 1 and described lower sand mold 2 are mutually matched and buckle Synthesis foundry goods die cavity 3；Described foundry goods die cavity 3 matches with the shape and size of described abrasive disk.In the specific implementation, The waterglass sand mold that rigidity is higher all selected by described upper sand mold 1 and described lower sand mold 2.

Wherein, described upper sand mold 1 includes sprue 11, cup 12 and steam vent 13；Described sprue 11 is arranged In the center of described upper sand mold 1 and run through described upper sand mold 1；Described cup 12 is arranged at described sprue 11 Top is connected with described sprue 11, and pouring molten iron enters described by described cup 12 and described sprue 11 Inside casting pattern；Described steam vent 13 runs through described upper sand mold 1 and the periphery near described upper sand mold 1, described row Pore 13 is used for being vented.

Described lower sand mold 2 includes flat ring shape ingate 22, unhurried current socket 21 and overflow insulation ring 23；Described unhurried current nest Seat 21 is arranged at correspondence position bottom described sprue 11 and is connected with described sprue 11, for accepting by sprue 11 molten iron fallen at first, prevent or reduce molten iron splashing and the impact to sand mold；Described flat ring shape ingate 22 cincture Periphery bottom described sprue 11 is connected with described sprue 11, and pouring molten iron is by described flat ring shape ingate 22 enter described foundry goods die cavity 3 from described sprue 11, by arranging described flat ring shape ingate 22, pouring molten iron energy Enough Omnibearing evens inside-out fill type, it is ensured that the temperature field uniformity of temperature profile of plate-like foundry goods all directions；Described overflow is protected Temperature circle 23 is arranged at the periphery of described foundry goods die cavity 3, it is ensured that described overflow insulation ring 23 and described foundry goods die cavity 3 are same Heart circumference；And the top of described overflow insulation ring 23 is connected with described steam vent 13, described overflow insulation ring 23 Side be connected with described foundry goods die cavity 3 by exhaustion spill mouth 24.In the utility model embodiment, described flat ring Shape ingate 22 is arranged at 3 times inward flange correspondence positions of described foundry goods die cavity, the bottom surface of the most described flat ring shape ingate 22 Bottom surface flush with described foundry goods die cavity 3；Described exhaustion spill mouth 24 is arranged at described foundry goods die cavity 3 upper outside edge pair Answering position, in the specific implementation, the section shape of described exhaustion spill mouth 24 is rectangle, described exhaustion spill mouth 24 End face and the end face flush of described foundry goods die cavity 3；Described flat ring shape ingate 22 and described exhaust are set overflow by ring-type Head piece 24, generally corresponds to working face, top is non-working surface, the scum silica frost in the molten iron of working face position and impurity bottom foundry goods Thing can fully float to non-working surface position, and the inherent quality requirement of high-end magnesium iron abrasive disk product has been effectively ensured.When So, when being embodied as, according to actual casting needs, described flat ring shape ingate 22 can be arranged by those skilled in the art Inward flange correspondence position on described foundry goods die cavity 3.It addition, described cup 12 uses refractory material to be prepared from, institute State sprue 11 and include the earthen-ware pipe of fireproof high-temperature resistant.

See Fig. 2, the plan structure schematic diagram of a kind of magnesium iron abrasive disk sand mold type molds provided for the utility model embodiment, In the utility model embodiment, including 8 steam vents 13, and described steam vent 13 is arranged at described overflow insulation ring 23 correspondence positions are also uniformly distributed along described overflow insulation ring 23.Certainly, in the specific implementation, described magnesium iron grinds Dish sand mold type molds can include any number of described steam vent 13, such as 10 etc., and multiple described steam vent 13 also may be used Think non-uniform Distribution.

The castability of described abrasive disk is closely related with temperature, solidifies principle, metal freezing acquisition group according to metal casting Knitting kind and grain size to be determined by intensity of cooling and speed, the metal hardness of different tissues and CRYSTALLITE SIZES collective is all Differ, so the abrasive disk working face difference of hardness size obtained is to be controlled by the temperature difference in its casting solidification temperature field 's.In order to ensure that described abrasive disk has standard compliant difference of hardness, it is ensured that uniform distribution of temperature field is consistent, described overflow The end face of insulation ring 23 overflows with described exhaust higher than the end face of described foundry goods die cavity 3, the bottom surface of described overflow insulation ring 23 The lower inner bottom surface of head piece 24 is concordant, thus ensures molten iron overflow capacity, and the hot-metal insulating utilizing overflow to go out reaches to control temperature The purpose of equilibrium.And, in order to ensure that ingate and exhaustion spill mouth can be fulfiled ahead of schedule solidifying before foundry goods starts to solidify in a large number Gu, the thickness of described exhaustion spill mouth 24 is less than the thickness of described flat ring shape ingate 22；Specifically, described flat ring shape The thickness of ingate 22 is 8-12mm, and the thickness of described exhaustion spill mouth 24 is 6-10mm.Certainly, according to actual production Demand, the thickness of described flat ring shape ingate 22 and described exhaustion spill mouth 24 can be set to appoint by those skilled in the art Anticipate other numerical value.

In the specific implementation, described magnesium iron abrasive disk sand mold type molds, when sand mold moulding, needs to carry out strict consolidation operation and carries The high degree of packing, thus graphitization expansion pressure when can bear magnesium iron solidification when abrasive disk casting solidification, and then ensure The castability of abrasive disk.

As seen from the above-described embodiment, the magnesium iron abrasive disk sand mold type molds that the utility model embodiment provides, including upper sand mold 1 With lower sand mold 2, described upper sand mold 1 and described lower sand mold 2 are mutually matched and are buckled into foundry goods die cavity 3；Described upper sand mold 1 Including sprue 11, cup 12 and steam vent 13, wherein said sprue 11 be arranged at sand mold 1 center, And run through described upper sand mold 1；Described cup 12 is arranged at the top of described sprue 11 and described sprue 11 phase Connection；Described steam vent 13 runs through described upper sand mold 1 and the periphery near described upper sand mold 1；Described lower sand mold 2 wraps Including unhurried current socket 21, flat ring shape ingate 22 and overflow insulation ring 23, described unhurried current socket 21 is arranged at described directly waters Correspondence position bottom road 11；The described flat ring shape ingate 22 periphery bottom described sprue 11 and described directly Running channel 11 is connected；Described overflow insulation ring 23 is arranged at the periphery of described foundry goods die cavity 3, and described overflow insulation ring The top of 23 is connected with described steam vent 13, side is connected with described foundry goods die cavity 3 by exhaustion spill mouth 24, And the bottom surface of described overflow insulation ring 23 is concordant with the lower inner bottom surface of described exhaustion spill mouth 24.Described exhaustion spill mouth 24 Thickness less than the thickness of described flat ring shape ingate 22.Described foundry goods die cavity 3 is by using described flat ring shape ingate 22, pouring molten iron fills shape from sprue 11 along described flat ring shape ingate 22 Omnibearing even inside-out, it is ensured that foundry goods All directions uniform distribution of temperature field；And, that described foundry goods die cavity 3 periphery is also devised with downwardly extending, separate with sand mold , independent ring-type overflow insulation ring 23, utilize the high temperature liquid iron of overflow to be incubated, reduce foundry goods inner edge and outer further The temperature contrast of edge, meets the requirement to difference of hardness of the high-quality abrasive disk；It addition, by around the exhaustion spill mouth arranged 24 and described flat ring shape ingate 22, utilize the graphitization expansion feature of During Solidification of S. G. Cast Iron to do from feeding, come fully The solidification shrinkage at the equilibrium each position of feeding foundry goods, reaching cast-internal, particularly working face region has higher-density and nothing The processing quality requirement of the defects such as shrinkage porosite slag inclusion, is effectively improved castability and the yield rate of abrasive disk.

Corresponding with the embodiment of a kind of magnesium iron abrasive disk sand mold type molds that the utility model provides, the utility model also includes Provide a kind of magnesium iron abrasive disk sand mold non-feedhead casting process, concrete casting process is selected above-mentioned magnesium iron abrasive disk sand Type casting mold.

See Fig. 3, for the flow process of a kind of magnesium iron abrasive disk sand mold non-feedhead casting process that the utility model embodiment provides Schematic diagram, described casting technique comprises the following steps:

Step S101: pouring molten iron stands a quiescent time preset, and removes the scum silica frost in described pouring molten iron.

Pouring molten iron is difficult to avoid that and there is scum silica frost the probability of dreg defect occur in order to reduce pouring cast part, needs to water Scum silica frost in note molten iron is removed.When reality is implemented, by the way of by pouring molten iron standing, it is ensured that scum silica frost floats as far as possible； Specifically, described pouring molten iron standing a time of repose preset, it is 5 that technical staff can arrange described time of repose Minute, certainly according to actual casting needs, described time of repose could be arranged to other any number.

In order to improve abrasive disk castability further, on the basis of the casting method shown in Fig. 3, by described cast Before molten iron stands, also include the step shown in Fig. 4, see Fig. 4, the another kind of ball provided for the utility model embodiment The schematic flow sheet of iron abrasive disk sand mold non-feedhead casting process, this technique includes:

Step S201: pouring molten iron is carried out nodularization and inoculation.

In order to improve mechanics and the mechanical performance of magnesium iron, in pouring molten iron, typically add magnesium, rare earth magnesium or rare earth silicon and magnesium close The kind nodulizers such as gold, carry out spheroidising to pouring molten iron；It is for stone that pouring molten iron carries out inoculation Main Function Ink separates out the nucleus providing enough, affects Solidification of Cast Iron, suppression spoken parts in traditional operas the size of graphite that controls, form and divides Cloth situation, reduces foundry goods end face sensitiveness, increases Eutectic Cell Number, the super cooling tendency of reduction molten iron, to reach to increase elasticity Modulus, improves the hardness distribution of thickness end face, improves and improve the mechanical performance of foundry goods, during concrete inoculation, Also it is to carry out by the way of adding inovulant.The nodularization of pouring molten iron and inoculation process are those skilled in the art Conventional method, detailed process does not repeats them here.

Step S202: remove the scum silica frost in described pouring molten iron.

By standing the scum silica frost in the pouring molten iron after removing nodularization and inoculation, the slag inclusion reducing foundry goods further lacks Fall into, improve the castability of described abrasive disk.

Step S102: described pouring molten iron is poured into foundry goods die cavity with first flow speed.

Select 40/100 mesh quartz sand or high rigidity waterglass sand mold make described foundry goods casting mold, in the specific implementation, General employing has the sand mould casting method of case, it is ensured that foundry goods lies in a horizontal plane in nowel central authorities, and mold thickness uniformity around； And when manufacturing described foundry goods casting mold, need to carry out consolidation operation and ensure the degree of packing of described casting sand type, and then improve The castability of abrasive disk.

After having made described foundry goods casting mold, the pouring molten iron after step S101 being processed pours into foundry goods with first flow speed Die cavity 3.In the specific implementation, the pouring molten iron after descum is injected sprue by the cup 12 of foundry goods casting mold In 11, and then it is internal to enter described foundry goods die cavity 3, in the incipient stage of cast, generally uses higher first flow speed Degree, to ensure that pouring molten iron quickly enters described foundry goods die cavity 3 inside and is filled with.In the utility model embodiment, The concrete numerical value of described first flow speed does not limits, and those skilled in the art can arrange institute according to actual casting demand State first flow speed.

Step S103: the flow speed adjusting described pouring molten iron gradually reduces to second flow speed.

In casting process, adjust described pouring molten iron at any time according to pouring molten iron filling extent in described foundry goods die cavity 3 Flow speed.In the utility model embodiment, it is preferable that according to the molten iron height in the cup 12 of foundry goods casting mold Judge whether to need to adjust to described second flow speed the flow speed of described pouring molten iron, and at casting process In the general cast strategy used first quick and back slow, the most described second flow speed is less than described first flow speed.Specifically, Presetting the first height threshold, the particular location of described first height threshold can be set according to actual casting demand, example The centre etc. of cup 12 as described in may be located at；Judge whether the molten iron height in the cup 12 of foundry goods casting mold is more than Described first height threshold, if the height of pouring molten iron is more than described first height threshold, adjusts described flow speed extremely Second flow speed.The most in the specific implementation, technical staff can carry out determining when described in adjustment according to other modes The flow speed of pouring molten iron, such as, can pour into a mould one section of timing with described first flow speed in the way of using timing After time, described flow speed is adjusted to described second flow speed；Described timing can be according to technical staff's The COMPREHENSIVE CALCULATING such as the volume of practical production experience, flow speed and foundry goods obtain.

See Fig. 5, a kind of schematic flow sheet pouring into a mould flow speed method of adjustment provided for the utility model embodiment, This cast flow speed method of adjustment comprises the following steps:

Step S1031: with preset flow percentage speed variation, adjusts the flow speed of described pouring molten iron to second flow speed Degree.

By the judgement of above-mentioned steps, when needing to carry out flow speed adjustment, can be with a flow speed rate of change preset Being adjusted, if the most described first flow speed is 100kg/min, described second flow speed is 50kg/min, Then can arrange described flow speed rate of change is 20kg/min², thus incrementally described first flow speed is adjusted to Described second flow speed.

Step S1032: according to the molten iron high variable quantity in the cup of foundry goods casting mold, adjust described percentage speed variation.

The speed of foundry goods die cavity is entered, according to the molten iron in the cup 12 of foundry goods casting mold in order to control pouring molten iron flexibly High variable quantity, adjusts described percentage speed variation；In the specific implementation, if the molten iron height of the most described cup 12 Decline rapidly, and slippage is very big, then can reduce described percentage speed variation even adjusting described percentage speed variation is 0, Ensure to pour into a mould with higher cast flow speed；If the molten iron high variable quantity in described cup 12 is little, then May represent that the filling speed of poring rate and foundry goods die cavity 3 reaches balance, can increase described percentage speed variation；If The molten iron height of described cup 12 has the trend of rising, then may represent that poring rate is too fast, needs to adjust as early as possible flow Speed, thus increase described percentage speed variation.

Certainly, the method for adjustment of above-mentioned flow speed is only exemplary description, and those skilled in the art can also be according to reality Knowhow carries out the dynamic adjustment of other modes, such as, can adjust described flow speed in stepwise mode, specifically Ground, adjusts described first flow speed to a middle flow speed, and keeps pouring into a mould with described middle flow speed After a period of time, described middle flow speed is being adjusted to described second flow speed etc.；And, specifically adjusting Cheng Zhong, can arrange any number of described middle flow speed, thus form staged and adjust.

In order to prevent the overflow in molten steel pouring course from wasting, see Fig. 6, the magnesium iron provided for the utility model embodiment The schematic flow sheet of abrasive disk sand mold non-feedhead casting process, on the basis of step shown in Fig. 3, the method also includes:

Step S301: judge that whether the molten iron height in the cup of foundry goods casting mold is more than the second height threshold.

Presetting the second height threshold, described second height threshold is near the rim of a cup of described cup 12；If cup 12 Interior molten iron height is more than described second height threshold, then pouring molten iron is likely to occur the risk of spilling.

Step S302: if the molten iron height in cup is more than described second height threshold, reduce pouring molten iron amount.

When the molten iron height of described cup 12 is more than described second height threshold, then reduce pouring molten iron amount, can be by Iron water amount is reduced to arbitrary value even 0；Then, whether changed by the molten iron height in described cup 12, it is judged that Whether described foundry goods die cavity 3 fills, thus carries out continuing cast, stopping cast or subsequent step.

Step S104: after foundry goods die cavity waters completely, with pouring molten iron described in the 3rd flow speed teeming with the default teeming time.

In order to prevent shrinkage cavity from producing, after described foundry goods die cavity 3 waters completely, carry out teeming with the 3rd flow speed；According to institute The duration stating teeming sets the described teeming time, and in the specific implementation, the described teeming time can be set as 1 minute； In the utility model embodiment, described 3rd flow speed and the concrete numerical value of described teeming time do not limit, ability Field technique personnel can be any number according to the 3rd flow speed described in actual casting requirements set and described teeming time.

As seen from the above-described embodiment, a kind of magnesium iron abrasive disk sand mold head-free casting work that the utility model embodiment provides Skill, by pouring molten iron is stood, and descum；Then, described pouring molten iron is poured into casting with first flow speed Part die cavity 3, the flow speed simultaneously adjusting described pouring molten iron is less than to second flow speed, described second flow speed Described first flow speed；After last foundry goods die cavity 3 waters completely, preset with pouring molten iron described in the 3rd flow speed teeming one The teeming time.By above-mentioned processing step, it is possible to effectively remove the scum silica frost of pouring molten iron, meet abrasive disk working face district Territory higher-density and nothing tighten the quality requirement of dreg defect；And risen by the big flow of employing in casting process and water, First quick and back slow, the mode of last teeming, it is possible to the Equilibrium Solidification of pouring molten iron is effectively ensured, effectively reduces casting solidification and receives The casting stress that contracting produces, improves quality and the yield rate of abrasive disk；It addition, by using sand mold type molds to cast, Production operation simple process, it is possible to be effectively improved the production efficiency of high-end magnesium iron abrasive disk product, reduces the energy of Foundry Production Consumption and expense.

It should be noted that in this article, such as the relational terms of " first " and " second " or the like be used merely to by One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or behaviour Relation or the order of any this reality is there is between work.And, term " includes ", " comprising " or it is any Other variants are intended to comprising of nonexcludability so that include the process of a series of key element, method, article or Equipment not only includes those key elements, but also includes other key elements being not expressly set out, or also includes for this mistake The key element that journey, method, article or equipment are intrinsic.In the case of there is no more restriction, statement " include one It is individual ... " key element that limits, it is not excluded that there is also in including the process of described key element, method, article or equipment Other identical element.

The above is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this reality With novel.Multiple amendment to these embodiments will be apparent to one skilled in the art, herein institute The General Principle of definition can realize in the case of without departing from spirit or scope of the present utility model in other embodiments. Therefore, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to disclosed herein Principle and the consistent the widest scope of features of novelty.

Claims (7)

1. a magnesium iron abrasive disk sand mold type molds, it is characterised in that include sand mold (1) and lower sand mold (2), wherein:

Described upper sand mold (1) and described lower sand mold (2) are mutually matched and are buckled into foundry goods die cavity (3)；

Described upper sand mold (1) includes sprue (11), cup (12) and steam vent (13), wherein:

Described sprue (11) is arranged at the center of described upper sand mold (1) and runs through described upper sand mold (1)；

Described cup (12) is arranged at the top of described sprue (11) and is connected with described sprue (11)；

Described steam vent (13) runs through described upper sand mold (1) and the periphery near described upper sand mold (1)；

Described lower sand mold (2) includes flat ring shape ingate (22), unhurried current socket (21) and overflow insulation ring (23), Wherein:

Described unhurried current socket (21) is arranged at the correspondence position of described sprue (11) bottom；

Described flat ring shape ingate (22) around described sprue (11) bottom periphery and described sprue (11) Being connected, pouring molten iron enters described foundry goods die cavity by described flat ring shape ingate (22) from described sprue (11) (3)；

Described overflow insulation ring (23) is arranged at the periphery of described foundry goods die cavity (3), and described overflow insulation ring (23) Top be connected with described steam vent (13), side is by exhaustion spill mouth (24) and described foundry goods die cavity (3) phase Connection, and the bottom surface of described overflow insulation ring (23) is concordant with the lower inner bottom surface of described exhaustion spill mouth (24)；

The thickness of described exhaustion spill mouth (24) is less than the thickness of described flat ring shape ingate (22).

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that described flat ring shape ingate (22) Be arranged at inward flange correspondence position under described foundry goods die cavity (3), described exhaustion spill mouth (24) is arranged at described foundry goods Die cavity (3) upper outside edge correspondence position.

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that include multiple steam vent (13), And described steam vent (13) is uniformly distributed along described overflow insulation ring (23) top.

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that described overflow insulation ring (23) End face higher than the end face of described foundry goods die cavity (3).

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that described flat ring shape ingate (22) Thickness be 8-12mm.

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that described exhaustion spill mouth (24) Thickness be 6-10mm.

Magnesium iron abrasive disk sand mold type molds the most according to claim 1, it is characterised in that described cup (12) wraps Including refractory nozzle cup, described sprue (11) includes earthen-ware pipe sprue.