CN207447323U - One kind covers sand cooling iron construction - Google Patents

Abstract

The utility model discloses one kind to cover sand cooling iron construction, and including chill, sand mold, casting, the chill is equipped with several conical through-holes, sand layer is equipped between the chill and the casting, the thickness of the sand layer is 3 5mm.Sand layer is high with chill body bonding strength, cover the conical through-hole that sand cooling iron working surface is cast with solid matter, when sand consolidation is put in moulding, the sand in taper hole is connected as a single entity with chill surface hanging sand layer, since furan resin-sand intensity is high, by the intensity of Castings Produce with Furan Resin itself, cold ironing surface thin sand is locked in chill surface by the back taper abrasive cone in taper hole from anchor, even if sand layer thickness accomplishes 5mm, during pouring molten iron, sand layer will not be heated shelling, lead to the problem of burning into sand class defect.

Description

One kind covers sand cooling iron construction

Technical field

The utility model is related to cover sand cooling iron construction.

Background technology

Casting is that the mankind are grasped than a kind of metal heat processing technique earlier, and casting is to be cast to liquid metals and part In the casting cavity that shape is adapted, after its cooled and solidified, to obtain the method for part or blank.Mostly it was originally by casting material matter Solid-state but the metal (example for being heated to liquid:Copper, iron, aluminium, tin, lead etc.), and the material of mold can be sand, metal even pottery Porcelain.In response to different requirements, the method used would also vary from.

In casting, due to structure and casting parameter, in die cavity during the molten steel solidification of the molten condition of each point Between be unequal, this will generate thermal stress after solidification to casting, cause casting deformation, crackle etc., simultaneously as cooling The defects of setting time etc., casting is present with loose, cold shut, stomata, to avoid generating thermal center, casting section thickness should use up in structure May uniformly the heat fatigue generated be concentrated to reduce mold amount of localized heat.The corner of casting is typically provided with appropriate casting Fillet to avoid there is wedge angle position that stress is caused to generate on mold, while sets chill, to accelerate cooling velocity, together at thermal center When, for casting is avoided the riser that defect is attached to casting top or side occur, to solve the problems, such as these.

To eliminate the Shrinkage cavity class defect of gray iron and the thick and solid position center portion of ductile cast iron casting, improve the consistency of casting It is a kind of common intervening measure using the solidification sequence of external chill technology controlling and process casting with the hardness of particular surface.External chill There are direct external chill and indirect external chill, two kinds of chills respectively have feature, there is specific use occasion.Sand cooling iron is covered (also known as to hang Sand cooling iron, every sand cooling iron) be a kind of common external chill, suitable for thick and solid medium-and-large-sized gray iron and ductile cast iron casting solidification it is suitable The control of sequence.

Cold ironing surface hanging sand layer comes off traditional Sanded chill in order to prevent, usually made on the surface of chill 2 strip or Cylindrical bump 21 enhances the combination power between 2 surface of hanging sand layer and chill, as shown in Figure 1.

The deficiency of traditional Sanded chill：

1. Quench ability is on the weak side, be spaced 10mm or so between strip or cylindrical bump top surface and casting, chill body with The height of casting spacing=10mm+ protrusions, hanging sand layer integral thickness in more than 20mm, chill body apart from cast(ing) surface farther out, The Quench ability of Sanded chill is on the weak side；

2. poor air permeability, traditional Sanded chill is solid chill, no gas permeability, after cast, on casting and chill interface Gas, it is impossible to effectively discharge, cast(ing) surface easily generates stomata or pit class defect；

3. be also easy to produce burning into sand class defect, chill hanging sand layer rely primarily on frictional force between layer of sand and chill surface bulge and The weaker adhesion strength of sand mold is fixed on chill surface, and reliability is poor, and layer of sand easy to shell during cast generates burning into sand defect.

Utility model content

To solve problem above existing in the prior art, the utility model provides one kind and covers sand cooling iron construction.

In order to solve the above-mentioned technical problem, the utility model provides following technical solution：

The utility model provides one kind and covers sand cooling iron construction, and including chill, sand mold, casting, the chill is equipped with several Conical through-hole is equipped with sand layer between the chill and the casting, the thickness of the sand layer is 3-5mm.

Further, it is equipped with abrasive cone in the conical through-hole, the abrasive cone in conical through-hole and sand layer are integrally formed knot Structure.

Further, the sand layer is made of furan resin-sand.

Further, the height of the conical through-hole is 60-70mm, and cross-sectional area maximum gauge is 40mm, minimum straight Footpath is 25mm.

Further, the chill is equipped with 6 row's conical through-holes, and often row is 6, and the spacing of conical through-hole is 50- two-by-two 55mm。

Compared with prior art, the utility model has the advantages that：

1. sand layer is high with chill body bonding strength, the conical through-hole that sand cooling iron working surface is cast with solid matter, moulding are covered When putting sand consolidation, the sand in taper hole is connected as a single entity with chill surface hanging sand layer, since furan resin-sand intensity is high, by furans tree Cold ironing surface thin sand is locked in chill surface from anchor, covers sand by the fat sand mold intensity of itself, the back taper abrasive cone in taper hole Even if layer thickness accomplishes 5mm, during pouring molten iron, sand layer will not be heated shelling, lead to the problem of burning into sand class defect；

2. the utility model covers sand cooling iron good permeability, the taper hole of solid matter can breathe freely, and advantageously reduce cast(ing) surface Stomata class defect；

3. cover sand cooling iron construction Quench ability strong, chill thickness/thermal center thickness=1/1, the chill hanging sand of the utility model Thickness is 5mm, and compared to traditional chill, the Quench ability of new-type chill improves more than 40%, and iron chill shock chilling ability is powerful, Ke Yiyou Effect improves the hardness of casting working face, thoroughly eliminates the large and medium-sized casting of gray iron and spheroidal graphite cast-iron with "T"-shaped slot or similar structures The center portion shrinkage porosite of part；

4. it is easy to operate, since the working face of the chill of the utility model is planar structure, as long as being set on chill surface The backing plate of different-thickness, you can freely control the thickness of sand layer, convenient and reliable operation.

Description of the drawings

Fig. 1 is that the prior art covers sand cooling iron construction schematic diagram.

Fig. 2 is that the utility model covers sand cooling iron construction body schematic diagram.

Fig. 3 is the top view of chill.

In figure：1- sand molds；2- chills；21- protrusions；3- casting；4- sand layers；22- conical through-holes；6- sandboxes；7- chills Backing plate；The ventilative sand cores of 8-；9- sand layer cavities.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model 1 to 3, to the technical scheme in the embodiment of the utility model It is clearly and completely described, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than complete The embodiment in portion.Based on the embodiment in the utility model, those of ordinary skill in the art are not before creative work is made All other embodiments obtained are put, shall fall within the protection scope of the present invention.

Technical means, creative features, achievable purpose and effectiveness to realize the utility model are easy to understand, below With reference to specific embodiment, the utility model is expanded on further.

The utility model provides one kind and covers sand cooling iron construction, as shown in Figure 2 to Figure 3, including chill 2, sand mold 1, casting 3, The chill 2 is equipped with several conical through-holes 22, and sand layer 4, the sand layer 4 are equipped between the chill 2 and the casting 3 Thickness be 3-5mm.

In the present embodiment, it is equipped with abrasive cone in the conical through-hole 22, the abrasive cone and sand layer 4 in conical through-hole are one Forming structure.

In the present embodiment, the sand layer 4 is made of furan resin-sand.

In the present embodiment, the height of the conical through-hole 22 is 60-70mm, and cross-sectional area maximum gauge is 40mm, Minimum diameter is 25mm.

In the present embodiment, the chill 2 is equipped with 6 row's conical through-holes, and often row is 6, two-by-two the spacing of conical through-hole For 50-55mm.

Chill in the utility model is the plane chill with solid matter conical through-hole.Using chill backing plate, accurately control is covered The thickness of layer of sand, sand layer minimum thickness can stably reach 5mm, workable, and sand layer consistency of thickness is good, casting matter Amount is stablized.

For ensure conical through-hole before sand layer is made not into sand, conical through-hole is empty, it is ensured that makes the sand mold of sand layer It is connected as a single entity with the abrasive cone in taper hole, to ensure that sand layer is locked in chill surface from anchor, has designed and produced dedicated ventilative Sand core core box, for making the ventilative sand core that Partial Blocking is carried out to taper hole, ventilative sand core is similarly furane resins from hard Sand, due to the characteristic of sand mold, mud core is ventilative.

It should be noted that the utility model covers sand cooling iron construction for one kind, sand layer is high with chill body bonding strength, The conical through-hole that sand cooling iron working surface is cast with solid matter is covered, when sand consolidation is put in moulding, sand and chill surface hanging sand layer in taper hole It is connected as a single entity, since furan resin-sand intensity is high, by the intensity of Castings Produce with Furan Resin itself, the back taper abrasive cone in taper hole will Cold ironing surface thin sand is locked in chill surface from anchor, even if sand layer thickness accomplishes 5mm, during pouring molten iron, and sand layer Shelling is notheated, leads to the problem of burning into sand class defect.So the utility model effectively overcome it is of the prior art it is a variety of lack It puts and has high industrial utilization.

The basic principle of the utility model and main feature and the advantages of the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description Simply illustrate the principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model is also Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed scope is defined by the appending claims and its equivalent thereof.

Claims (5)

1. one kind covers sand cooling iron construction, which is characterized in that including chill, sand mold, casting, the chill leads to equipped with several tapers Hole is equipped with sand layer between the chill and the casting, the thickness of the sand layer is 3-5mm.

2. one kind according to claim 1 covers sand cooling iron construction, which is characterized in that abrasive cone is equipped in the conical through-hole, Abrasive cone in conical through-hole is an integral molding structure with sand layer.

3. one kind according to claim 2 covers sand cooling iron construction, which is characterized in that the sand layer is by furan resin-sand system Into.

4. one kind according to claim 3 covers sand cooling iron construction, which is characterized in that the height of the conical through-hole is 60- 70mm, cross-sectional area maximum gauge are 40mm, minimum diameter 25mm.

5. one kind according to claim 1 covers sand cooling iron construction, which is characterized in that the chill leads to equipped with 6 row's tapers Hole, often row is 6, and the spacing of conical through-hole is 50-55mm two-by-two.