CN104668469A - Sand core - Google Patents
Sand core Download PDFInfo
- Publication number
- CN104668469A CN104668469A CN201310609808.5A CN201310609808A CN104668469A CN 104668469 A CN104668469 A CN 104668469A CN 201310609808 A CN201310609808 A CN 201310609808A CN 104668469 A CN104668469 A CN 104668469A
- Authority
- CN
- China
- Prior art keywords
- core
- sand core
- sand
- vertical component
- water jacket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Abstract
The invention discloses a sand core. The sand core is positioned at a water jacket part between a cylinder liner and a shell of a dry cylinder liner machine body; positioning parts are arranged at the two ends of the sand core; a support clamp is arranged on the sand core; and the two ends of the support clamp are embedded in the sand core. The support clamp with an effect of positioning convenience is arranged in the center position of the sand core; and because of the existence of the support clamp, the sand core is not liable to generate the broken and deformed phenomenon in casting and core production, so that an internal structure between a cylinder body and the cylinder liner is more precise, the geometric size is guaranteed, and the pass percent of products is largely improved.
Description
Technical field
The present invention relates to a kind of lost-foam casting method, be specifically related to a kind of core.
Background technology
Lost foam casting is also called dry sand vacuum full mould casting, is referred to as EPC abroad, is current one of state-of-the-art casting technique in the world, is described as once " revolution " in casting history, is referred to as 21 century Green foundry both at home and abroad.This method first makes bubble moulding model by technological requirement, be coated with special high-temperature resistant coating, after drying, be placed in special sandbox, dry sand is inserted again by technological requirement, utilize three-dimensional vibrating consolidation, vacuumize casting metals liquid under state, now model gasification disappears, molten metal replacement model, copying the foundry goods the same with steeping moulding model. its technological process comprises: make and steep moulding model-composite pouring system-special fireproof coating of model surface spary and to dry-be placed in by special interlayer sandbox on three-dimensional vibrating workbench-insert bed load (drystone sand) jolt ramming, strike off-model of oven dry is put on bed load, dry sand is filled up by technological requirement, numerical control vibration appropriate time, then case mouth-use covered rearing with plastic film case mouth is struck off, put cup, start vacuum system, dry sand fastening shaping after, pour into a mould, model disappears, molten metal replaces its position-release vacuum, by technique mould turnover after foundry goods condensation, foundry goods is taken out from loose quartz sand.
When lost foam casting process produces dry cylinder body, adopt prefabricated core to carry out filling water jacket part, because water jacket is middle without any connection, when making and pour into a mould, easily occur that core is out of shape.The distortion of core causes the filling of water jacket part unreal, thus causes molten metal to reveal, and affects the quality of product.
Summary of the invention
In order to solve this pitch problems in the middle of water jacket, the present invention adopts propclip to do one to stablize, provide a kind of core that core can be prevented to be out of shape.
To achieve these goals, the technical solution of employing is in the present invention:
A kind of core, the water jacket part of described core between the cylinder sleeve and shell of cylinder sleeve body, it is characterized in that, the two ends of described core are provided with location division, described in be provided with location division core be made up of coated sand core shooting machine; Described core is provided with propclip, and described propclip is metallic support card, and comprise a vertical component effect, two parallel portion, two parallel portion are separately fixed at the two ends of vertical component effect; Parallel portion is embedded in core; The two ends of vertical component effect are embedded in core, are exposed in air in the middle of it.
Further, the cross section of described parallel portion is circular or triangle or rectangle, and described vertical component effect is parallel to the radial direction of cylinder barrel.
Further, described metallic support card is irony.
The beneficial effect that the present invention can produce:
(1) propclip of location, convenience effect is set in the center of core, due to the existence of propclip when casting and coremaking, core not easily produces fragmentation and metaboly, make the internal structure between cylinder body and cylinder sleeve very accurate, ensure physical dimension, substantially increase the qualification rate of product;
(2) location core print is set at the two ends of film covered sand core, to its positioning action of core, prevents it to be subjected to displacement;
(3) propclip is arranged on the part without any connection in the middle of core, and will be positioned at the connection gap place of the adjacent cylinder of Bai Mo after filling with white module, can not cause crimp to the shape of cylinder sleeve.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of core of the present invention.
Accompanying drawing 2 is the structural representation of support card of the present invention.
Wherein: 1. core; 21. parallel portion; 22. vertical component effects; 3. location division.
Detailed description of the invention
Composition graphs 1,2 illustrates present embodiment, and a kind of core 1, the water jacket part of this core 1 between the cylinder sleeve and shell of dry cylinder body, Figure 1 shows that the core 1 of four cylinder engine dry cylinder body, and the shape of core 1 and the matching form of body close.During owing to manufacturing dry cylinder body in Technology of EPC, because the water jacket partial gap between cylinder sleeve and shell is limited, usually cause back-up sand unreal, and cause the molten metal between body and cylinder sleeve to be revealed, cause waste product, and core 1 of the present invention is arranged on this water jacket part between cylinder sleeve and shell, solve because dry sand fills the unreal problem causing waste product.The shape of core 1 matches with the shape of water jacket part herein.The two ends of described core 1 are provided with location division 3; Be provided with propclip in described core 1, the two ends of described propclip are embedded in core 1, and intermediate portion is positioned at the position without any connection in the middle of water jacket.
Described support card is metallic support card.
The described core 1 being provided with location division 3 is made up of coated sand core shooting machine.Location division 3 is also made up of precoated sand, and with core 1 one, film covered sand core 1 is not only positioned at water jacket part by location division 3, and when in film covered sand core 1 adhesive gasify after, location division 3 also becomes sand and flows out from fabrication hole, need not clear up.
Described propclip comprises the two ends that a vertical component effect 21, two parallel portion 22, two parallel portion 22 are separately fixed at vertical component effect 21; Parallel portion 22 is embedded in core 1; The two ends of vertical component effect 21 are embedded in core 1, are exposed in air in the middle of it.Vertical component effect 21 is positioned at the connection gap place of white mould adjacent cylinder.
The cross section of described parallel portion 22 is circular or triangle or rectangle.
Described vertical component effect 21 is parallel to the radial direction of cylinder barrel.
Described metallic support card is irony.In casting process, metallic support card impregnates and combines together with molten metal in the molten metal of high temperature.
Manufacture the method for the lost foam casting dry cylinder body core 1 described in above-mentioned arbitrary technical scheme, support card is placed in core 1 mould of coated sand core shooting machine, in core 1 mould, injects precoated sand.
Described precoated sand is sand in coating phenolic resin.
Body due to dry cylinder body has the built-in hollow water jacket of a watering cycle, for giving engine cooling, therefore this hollow water jacket dry sand when common law back-up sand may fill hardly, namely hollow water jacket cannot be formed according to both shaped of evaporative pattern cast model, causes waste product.In order to solve the unreal waste product caused of back-up sand, the hollow water jacket part of the present invention between the shell and cylinder sleeve of the white mould of dry cylinder body arranges core 1, the white mould of cylinder sleeve can insert the inner space 4 of film covered sand core 1, be close together closely with the inwall of core 1, the shell Bai Moyanbaimo medium line of dry cylinder body is divided into outer white mould I, outer white mould II two parts, be close together closely with the outer wall of core 1, each several part adopts conventional adhesive form by words spoken by an actor from offstage mould, outer white mould I, outer white mould II 3 part sticks together, the core 1 that precoated sand is made after pouring molten iron becomes the dry sand be scattered, can enter from reserved, delivery port and reserved fabrication hole are poured out, define the hollow jacket space of core 1 shape, as long as make the shape of core 1 according to the shape of hollow water jacket, just can solve that back-up sand is unreal causes the problem of waste product.Fabrication hole can spread plug with water blocking when product turnout.
When making and pour into a mould, due to the existence of propclip, by cylinder holes place, the inner side supporting & stablizing of core.When making core 1, support card be placed on the mould of making core, after injecting precoated sand, support card is bumped in core and plays fixation, prevents from being extruded distortion without any coupling part in the middle of core; And when pouring metal melt, the both sides that support card supports without any coupling part in the middle of core are fixed, due to molten metal pour into Bai Mo gasification time, core does not also become dry sand for some time, support card supports water jacket part when molten metal is liquid, the now existence of support card can help to bear the impulse force that casting of molten metal causes, and prevents core crimp.Adopt the present invention to cast dry cylinder body, product qualified rate can improve 120%.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned citing, and the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.
Claims (3)
1. a core, the water jacket part of described core between the cylinder sleeve and shell of cylinder sleeve body, it is characterized in that, the two ends of described core are provided with location division, described in be provided with location division core be made up of coated sand core shooting machine; Described core is provided with propclip, and described propclip is metallic support card, and comprise a vertical component effect, two parallel portion, two parallel portion are separately fixed at the two ends of vertical component effect; Parallel portion is embedded in core; The two ends of vertical component effect are embedded in core, are exposed in air in the middle of it.
2. a kind of core according to claim 1, is characterized in that, the cross section of described parallel portion is circular or triangle or rectangle, and described vertical component effect is parallel to the radial direction of cylinder barrel.
3. a kind of core according to claim 1, it is characterized in that, described metallic support card is irony.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310609808.5A CN104668469A (en) | 2013-11-27 | 2013-11-27 | Sand core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310609808.5A CN104668469A (en) | 2013-11-27 | 2013-11-27 | Sand core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104668469A true CN104668469A (en) | 2015-06-03 |
Family
ID=53304346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310609808.5A Pending CN104668469A (en) | 2013-11-27 | 2013-11-27 | Sand core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104668469A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862531A (en) * | 2015-12-11 | 2017-06-20 | 通用汽车环球科技运作有限责任公司 | Aluminium rotor housing and its manufacture method |
| CN112719215A (en) * | 2020-12-22 | 2021-04-30 | 诸暨市海川机械铸造有限公司 | Pump body casting equipment and casting process |
-
2013
- 2013-11-27 CN CN201310609808.5A patent/CN104668469A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862531A (en) * | 2015-12-11 | 2017-06-20 | 通用汽车环球科技运作有限责任公司 | Aluminium rotor housing and its manufacture method |
| CN106862531B (en) * | 2015-12-11 | 2019-06-07 | 通用汽车环球科技运作有限责任公司 | Aluminium rotor housing and its manufacturing method |
| CN112719215A (en) * | 2020-12-22 | 2021-04-30 | 诸暨市海川机械铸造有限公司 | Pump body casting equipment and casting process |
| CN112719215B (en) * | 2020-12-22 | 2022-06-24 | 诸暨市海川机械铸造有限公司 | Pump body casting equipment and casting process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |