CN104353791B - A kind of oil pipe foundry sand cored structure and preparation method thereof, application - Google Patents
A kind of oil pipe foundry sand cored structure and preparation method thereof, application Download PDFInfo
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- CN104353791B CN104353791B CN201410643063.9A CN201410643063A CN104353791B CN 104353791 B CN104353791 B CN 104353791B CN 201410643063 A CN201410643063 A CN 201410643063A CN 104353791 B CN104353791 B CN 104353791B
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- core
- glass tape
- sand
- wound around
- oil pipe
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- 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
- B22C9/103—Multipart cores
Abstract
Open a kind of oil pipe foundry sand cored structure of the present invention and preparation method thereof, application, it is adaptable to there is the making of the sand cores of castings of overlength cast tube structure.This oil pipe casting sand core structure is made up of the glass tape of core and core surface；This preparation method is to be wrapped on core according to certain canoe by the glass tape of certain specification, and the sand core structure using this preparation method to prepare has certain intensity, adds refractoriness and the fineness on core surface；Use this sand core structure casting intensity, reduce the burning into sand defect of foundry goods.
Description
Technical field
The application relates to a kind of foundry sand cored structure and preparation method thereof, application, is specifically related to a kind of oil pipe casting
With sand core structure and preparation method thereof, application.
Background technology
Usually said oil pipe refers to transmit the pipe fitting of oil circuit, can be divided into rubber-like oil pipe and steel pipe；Herein described
Oil pipe then refer to high-pressure oil pipe used for diesel engine, it is a kind of seamless steel pipe manufacturing diesel fuel engine injection system high-voltage tube,
This kind of steel pipe generally uses casting of metals method to prepare.
What in diesel engine, conveying oil played a crucial role is main oil pipe, and its length is usually 3-4 rice, and this oil pipe is in technology
On be not allow for any seepage.The Foundry Production of this type of oil pipe is mostly the mode using casting of metals at present, i.e. makes
Get the mould used by casting ready, including outer stationary part i.e. sand bag and internal moulding section i.e. core.Wherein, if
The own length of foundry goods oil pipe needing casting is longer, and usual more than 2 meters persons mostly relatively are 3-4 rice, and core is typically adopted
Making by hand, but make by hand, core surface is rougher, causes casting oil pipe internal surface out-of-flatness.Meanwhile,
Owing to foundry goods oil pipe is longer, core necessarily uses the arbor being arranged at its inside as the support to core close-over, keeps away
Exempt from close-over to be destroyed in casting cycle, deform, wash away, rupture and affect casting quality.
Further, since in casting process, 1/3rd of a diameter of foundry goods tubing diameter of arbor, cause close-over
Annular radius is less, is easily caused the continuous action of high temperature liquid iron in casting cycle, and the baking time of close-over is long, sand
Tire surface is the most defeated and dispersed, causes core sand to pour in casting metals liquid, and the foundry goods that molten metal is cooled into can have more
Burning into sand defect, the especially pipe body part burning into sand defect of foundry goods oil pipe becomes apparent from.As a result, conduit portions
There is burning into sand defect in position, it is impossible to saves, serious in the case of can cause the casting leakage that produces, affect it and make
Safe operation with equipment such as diesel engine.
Summary of the invention
In view of this, the application provides a kind of oil pipe foundry sand cored structure and preparation method thereof, application, and it is permissible
It is effectively improved the intensity of core, reduces the burning into sand defect of foundry goods oil pipe, the inner surface light of gained foundry goods oil pipe simultaneously
Sliding smooth.
For solving above technical problem, first technical scheme of the application is a kind of oil pipe foundry sand cored structure of employing,
Described sand core structure is provided with core and is wrapped in the glass tape on core surface；The width of described glass tape is sand
0.4-0.6 times of core diameter, the thickness of described glass tape is 0.2-0.35mm.
Described glass tape is wrapped in core surface according to following canoe: in core length one end as initial
Point, glass tape starts the first winding along the direction that angle α diametric with core is 8-10 °, and first is wound around
The glass tape edge of medium sand wicking surface is contact overlap joint, terminates the first winding at distance starting point 20-30mm；
Then being adjusted to by glass tape along angle β diametric with core is that the direction of 25-30 ° starts the
Two are wound around, second be wound around the glass tape edge of medium sand wicking surface be spaced apart 0.5-0.8mm, distance core another
The second winding is terminated at end i.e. terminating point 20-30mm；
Finally being adjusted to by glass tape along angle γ diametric with core is that the direction of 8-10 ° starts the
Three are wound around, and the 3rd glass tape edge being wound around medium sand wicking surface is contact overlap joint, and the 3rd is wound up as being wound to terminate
Point terminates to obtain sand core structure；
Starting point and ending point all uses adhesive to be fixed on core by glass tape.
Preferably, the thickness of described glass tape is 0.2-0.35mm.
Preferably, described core is made up of arbor and the close-over being wrapped in arbor periphery.
Preferably, described arbor diameter is not more than 1/3rd of core diameter.
Preferably, described adhesive Baume degrees is 70% 80%.
Preferably, described first winding, the second winding and the 3rd are wound around to be and are wound around clockwise.
Preferably, cut in winding process owing to angle direction adjusts the folded portion of the glass tape caused.
Preferably, at surface-coated one coating of the glass tape of gained sand core structure, and be dried, polish after be coated with
Cover second layer coating, the core mold of metal oil conduit casting after drying, must be directly applied to.
The application also provides for the technical scheme of second aspect, and the most aforementioned arbitrary sand core structure is raw at casting metal oil conduit
Application in product, a length of more than 2 meters of described metal oil conduit.
The application also provides for the technical scheme of the third aspect, the preparation method of the most aforementioned arbitrary sand core structure, arranges
Having core and glass tape, the width of described glass tape is 0.4-0.6 times of core diameter, described glass tape
Thickness is 0.2-0.35mm.
Described glass tape is wrapped in core surface according to following canoe: in core length one end as starting point,
Glass tape starts the first winding along the direction that angle α diametric with core is 8-10 °, and first is wound around medium sand
The glass tape edge of wicking surface is contact overlap joint, terminates the first winding at distance starting point 20-30mm；
Then glass tape is adjusted to the direction along angle β diametric with core is 25-30 ° and starts second
Being wound around, second is wound around the 0.5-0.8mm that is spaced apart at the glass tape edge of medium sand wicking surface, the distance core other end
The second winding is terminated at i.e. terminating point 20-30mm；
Finally being adjusted to by glass tape along angle γ diametric with core is that the direction of 8-10 ° starts the 3rd and twines
Around, the 3rd glass tape edge being wound around medium sand wicking surface is contact overlap joint, and the 3rd is wound up as being wound to terminating point eventually
Stop to obtain sand core structure；
Starting point and ending point all uses adhesive to be fixed on core by glass tape.
The primary improvements of the application are winding glass tape on core surface, and this sand core structure improves core
Intensity, add the fineness on core surface.
The application provides the benefit that: the application uses above-mentioned preparation method to prepare sand core structure, strengthens core strong
Degree, improves core refractoriness, uses this sand core structure cast in oil tubes, and the interior surface of oil pipe is smooth, does not has
There is burning into sand defect, improve qualification rate.
Accompanying drawing explanation
Fig. 1 is the winding method schematic diagram of the glass tape of the application.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical scheme of the application, below in conjunction with specific embodiment party
The application is described in further detail by formula.
Oil pipe foundry sand cored structure described herein, it is provided with core 2 and is wrapped in the glass on core 2 surface
Glass silk ribbon 1；0.4-0.6 times that width is core diameter of described glass tape 1, the thickness of described glass tape 1
For 0.2-0.35mm.
Described glass tape 1 is wrapped in core 2 surface according to following canoe: in core length one end as initial
Point, glass tape 1 starts the first winding along the direction that angle α diametric with core 2 is 8-10 °, and first
In winding, glass tape 1 edge on core 2 surface is contact overlap joint, end first at distance starting point 20-30mm
It is wound around；
Then glass tape 1 is adjusted to the direction along angle β diametric with core 2 is 25-30 ° start
Second is wound around, and in the second winding, glass tape 1 edge of core 2 is spaced apart 0.5-0.8mm, distance core 2
The second winding is terminated at the other end i.e. terminating point 20-30mm；
Finally being adjusted to by glass tape 1 along angle γ diametric with core 2 is that the direction of 8-10 ° starts the
Three are wound around, and in the 3rd winding, glass tape 1 edge on core 2 surface is contact overlap joint, and the 3rd is wound up as being wound to
Terminating point terminates to obtain sand core structure；
Starting point and ending point all uses adhesive to be fixed on core 2 by glass tape.
Preparation method described herein is used to prepare described sand core structure and apply it to cast diesel-engine body oil pipe
(a diameter of 80mm, a length of 3m) detailed process is as follows:
1, blank core is prepared
First preparing arbor, described arbor uses steel pipe, and diameter of steel tube is 27mm, and steel pipe surrounding uniformly gets out φ
The circular hole of 10, as steam vent, is wound around two circle iron wires on steel pipe back and forth；
Then prepare core, arbor be placed in mould, then resin sand is all filled around steel pipe arbor with ground,
And each position consolidation is put in place, make resin sand flush with mould upper surface, resin sand parcel arbor forms core,
Finally harden the demoulding, core is removed from the molds；
Finally polishing core, overlap of polishing after taking out core makes the clean finishing in its surface, makes blank core.
2, at the core surface wrap glass tape made
First glass tape 1 is chosen: described glass tape specification (width, the thickness) parameter needing to be wound around is with oily
The size relation of pipe diameter is as shown in table 1., can obtain according to table 1, select the described glass fiber needing to be wound around
Band 1, its width is 40mm, and thickness is 0.3mm.
Table 1 glass tape specification and tubing diameter parameter form
| Tubing diameter φ (mm) | ＜ 30 | 30-50 | 50-70 | 70-90 | ＞ 90 |
| Glass tape width (mm) | 12 | 25 | 30 | 40 | 50 |
| Glass tape thickness (mm) | 0.20 | 0.25 | 0.25 | 0.30 | 0.35 |
It is then around glass tape 1: first at one layer of adhesive of core external coating, the Baume of wherein said adhesive
Degree is 70% 80%, the most again according to following canoe, described glass tape is wrapped in core surface, as
Shown in Fig. 1:
First in core 2 length one end as starting point, glass tape 1 is along angle α diametric with core 2
Start 3 first to be wound around along clockwise direction for the direction of 8-10 °, the glass tape on core 2 surface in the first winding
1 edge is contact overlap joint, terminates the first winding at distance starting point 20-30mm；
Secondly glass tape 1 is adjusted to the direction along angle β diametric with core 2 is 25-30 ° start
3 second being wound around along clockwise direction, in the second winding, glass tape 1 edge on core 2 surface is spaced apart
0.5-0.8mm, terminates the second winding at distance core 2 other end i.e. terminating point 20-30mm；
Finally glass tape 1 is adjusted to the direction along angle γ diametric with core 2 is 8-10 ° and starts edge
3 the 3rd being wound around clockwise, in the 3rd winding, glass tape 1 edge on core 2 surface is contact overlap joint, the
Three are wound up as being wound to terminating point terminates to obtain sand core structure；
Wherein, starting point and ending point all uses adhesive to be fixed on core 2 by glass tape.
3, the core of glass tape is wound described in surface drying
First on described core surface, coat a coating and be dried, wherein using natural gas surface drying so that it is aridity
Reaching 70%, then coat second layer coating being dried after polishing, wherein natural drying enters baking oven again and does after 3 hours,
So that it is standby.
4, cast in oil tubes
First casting technology and pattern assembly is ready to, by technological requirement, the described sand core structure prepared is put into mould
In and carry out pre-treatment before mould assembling；Then mould assembling cast, the last demoulding obtains institute's cast in oil tubes.
In being embodied as, the application is with the casting of diesel-engine body oil pipe (a diameter of 80mm, a length of 3m)
An application as the present invention.
The existing core of matched group 1 casts
Use existing sand core for casting, place it in mould, then mould assembling cast, the last demoulding obtains being cast
Oil pipe.
Experimental group 1 the application sand core structure casts
Using surface to have the sand core structure of glass tape, the width of wherein said glass tape is core diameter
0.4-0.6 times, the thickness of described glass tape is 0.2-0.35mm, and described glass tape is according to certain canoe
It is wrapped on core surface.Aforementioned the application mode is used to be applied in casting.
Embodiment 1: foundry goods inner surface fineness is tested
As a example by casting diesel-engine body oil pipe, test with above-mentioned matched group and experimental group respectively, cast
The diesel-engine body oil pipe prepared all uses the same mode of production to cast in casting process.
Measuring the average smooth flatness of gained diesel-engine body pipe inner surface, the data obtained list 2 is as follows:
Table 2 foundry goods inner surface fineness is tested
| Experimental subject | Matched group 1 | Experimental group 1 |
| Ra/μm | 70-100 | 40-50 |
Embodiment two: foundry goods burning into sand defect test
As a example by casting diesel-engine body oil pipe, test with above-mentioned matched group and experimental group respectively, cast
The diesel-engine body oil pipe prepared all uses the same mode of production to cast in casting process.
Gained diesel-engine body oil pipe uses detector device to detect its burning into sand defective locations quantity X/, and the data obtained arranges
Table 3 is as follows:
Table 3 foundry goods burning into sand defect test
| Experimental subject | Matched group 1 | Experimental group 1 |
| X/ | 8 | 4 |
The detailed description of the invention of the application is as follows:
Detailed description of the invention 1: the width of described glass tape is 0.4-0.6 times of core diameter, described glass tape
Thickness be 0.2-0.35mm；The canoe of described glass tape is the application canoe.
Detailed description of the invention 2: the width of described glass tape is 0.1-0.2 times of core diameter, described glass tape
Thickness be 0.4-0.7mm；The canoe of described glass tape is the application canoe.
Detailed description of the invention 3: the width of described glass tape is 0.4-0.6 times of core diameter, described glass tape
Thickness be 0.2-0.35mm；The canoe of described glass tape is as starting point, glass in core length one end
Glass silk ribbon starts to be wound around along the direction that angle α diametric with core is 8-10 ° clockwise, is wound to core long
The degree other end terminates.
Equally as a example by casting diesel-engine body oil pipe, above-mentioned detailed description of the invention 1-3 is used to cast.
Using aforementioned same mode, instrument to detect, and detect same data, the data obtained list 4 is such as
Under:
Table 4 the application detailed description of the invention
| Detailed description of the invention | 1 | 2 | 3 |
| Inner surface fineness Ra/ μm | 42 | 48 | 50 |
| Burning into sand defective locations quantity X/ | 3 | 4 | 5 |
Interpretation:
From table 2, table 3 it can be seen that matched group medium casting inner surface fineness is 70-100Ra/ μm, and test
Group medium casting inner surface fineness is 40-50Ra/ μm, improves a grade；In matched group, the number of burning into sand is bright
Aobvious more than experimental group.
As can be seen from Table 4: use detailed description of the invention 1 i.e. the application mode to be applied in cast casting, improve
Foundry goods inner surface fineness, reduces burning into sand defect, improves qualification rate.
Below it is only the preferred implementation of the application, it is noted that above-mentioned preferred implementation is not construed as
Restriction to the application, the protection domain of the application should be as the criterion with claim limited range.For this skill
For the those of ordinary skill in art field, without departing from spirit and scope, it is also possible to make some changing
Entering and retouch, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (9)
1. an oil pipe foundry sand cored structure, it is characterised in that: described sand core structure is provided with core and is wrapped in core
The glass tape on surface；The width of described glass tape is 0.4-0.6 times of core diameter, the thickness of described glass tape
Degree is 0.2-0.35mm；
Described glass tape is wrapped in core surface according to following canoe: in core length one end as starting point,
Glass tape starts the first winding along the direction that angle α diametric with core is 8-10 °, and first is wound around medium sand
The glass tape edge of wicking surface is contact overlap joint, terminates the first winding at distance starting point 20-30mm；
Then being adjusted to by glass tape along angle β diametric with core is that the direction of 25-30 ° starts the
Two are wound around, second be wound around the glass tape edge of medium sand wicking surface be spaced apart 0.5-0.8mm, distance core another
The second winding is terminated at end i.e. terminating point 20-30mm；
Finally being adjusted to by glass tape along angle γ diametric with core is that the direction of 8-10 ° starts the
Three are wound around, and the 3rd glass tape edge being wound around medium sand wicking surface is contact overlap joint, and the 3rd is wound up as being wound to terminate
Point terminates to obtain sand core structure；
Starting point and ending point all uses adhesive to be fixed on core by glass tape.
A kind of oil pipe foundry sand cored structure the most according to claim 1, it is characterised in that: described core by
Arbor and the close-over composition being wrapped in arbor periphery.
A kind of oil pipe foundry sand cored structure the most according to claim 2, it is characterised in that: described arbor is straight
Footpath is not more than 1/3rd of core diameter.
A kind of oil pipe foundry sand cored structure the most according to claim 1, it is characterised in that: described adhesive
Baume degrees is 70% 80%.
A kind of oil pipe foundry sand cored structure the most according to claim 1, it is characterised in that: described first twines
Around, second be wound around and the 3rd be wound around to be and be wound around clockwise.
A kind of oil pipe foundry sand cored structure the most according to claim 1, it is characterised in that: at winding process
In cut owing to angle direction adjusts the folded portion of glass tape caused.
A kind of oil pipe foundry sand cored structure the most according to claim 1, it is characterised in that: at gained core
Surface-coated one coating of the glass tape of structure, and be dried, polish after coat second layer coating, after drying
Directly apply to the core mold of metal oil conduit casting.
8. according to the sand core structure described in any one of claim 1-7 in the application cast during metal oil conduit produces, its
It is characterised by, a length of more than 2 meters of described metal oil conduit.
9. according to the preparation method of the sand core structure described in any one of claim 1-7, it is characterised in that: it is provided with
Core and glass tape, the width of described glass tape is 0.4-0.6 times of core diameter, the thickness of described glass tape
Degree is 0.2-0.35mm；
Described glass tape is wrapped in core surface according to following canoe: in core length one end as initial
Point, glass tape starts the first winding along the direction that angle α diametric with core is 8-10 °, and first is wound around
The glass tape edge of medium sand wicking surface is contact overlap joint, terminates the first winding at distance starting point 20-30mm；
Then being adjusted to by glass tape along angle β diametric with core is that the direction of 25-30 ° starts the
Two are wound around, second be wound around the glass tape edge of medium sand wicking surface be spaced apart 0.5-0.8mm, distance core another
The second winding is terminated at end i.e. terminating point 20-30mm；
Finally glass tape is adjusted to the direction along angle γ diametric with core is 8-10 ° and starts the 3rd
Being wound around, the 3rd glass tape edge being wound around medium sand wicking surface is contact overlap joint, and the 3rd is wound up as being wound to terminating point
Terminate to obtain sand core structure；
Starting point and ending point all uses adhesive to be fixed on core by glass tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410643063.9A CN104353791B (en) | 2014-11-13 | 2014-11-13 | A kind of oil pipe foundry sand cored structure and preparation method thereof, application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410643063.9A CN104353791B (en) | 2014-11-13 | 2014-11-13 | A kind of oil pipe foundry sand cored structure and preparation method thereof, application |
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| Publication Number | Publication Date |
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| CN104353791A CN104353791A (en) | 2015-02-18 |
| CN104353791B true CN104353791B (en) | 2016-09-21 |
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| US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
| CN103008559A (en) * | 2013-01-11 | 2013-04-03 | 沈阳铸造研究所 | Preparation method of high-heat-conductivity high-collapsibility oil tube core |
| CN104070135A (en) * | 2014-06-19 | 2014-10-01 | 宁夏共享装备有限公司 | Casting method of sand core oil tube of internal combustion engine |
| CN104117630A (en) * | 2014-06-30 | 2014-10-29 | 济柴聊城机械有限公司 | Main oil gallery sand core mold of large engine body and core manufacturing method |
| CN104117631A (en) * | 2014-06-30 | 2014-10-29 | 济柴聊城机械有限公司 | Method and device for improving quality of casting holes of main oil pipeline of machine body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000225439A (en) * | 1999-02-05 | 2000-08-15 | Toyota Motor Corp | Core for casting |
-
2014
- 2014-11-13 CN CN201410643063.9A patent/CN104353791B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854609A (en) * | 1958-02-06 | 1960-11-23 | Dow Chemical Co | A method of making contractable cores |
| US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
| CN103008559A (en) * | 2013-01-11 | 2013-04-03 | 沈阳铸造研究所 | Preparation method of high-heat-conductivity high-collapsibility oil tube core |
| CN104070135A (en) * | 2014-06-19 | 2014-10-01 | 宁夏共享装备有限公司 | Casting method of sand core oil tube of internal combustion engine |
| CN104117630A (en) * | 2014-06-30 | 2014-10-29 | 济柴聊城机械有限公司 | Main oil gallery sand core mold of large engine body and core manufacturing method |
| CN104117631A (en) * | 2014-06-30 | 2014-10-29 | 济柴聊城机械有限公司 | Method and device for improving quality of casting holes of main oil pipeline of machine body |
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| CN104353791A (en) | 2015-02-18 |
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Address after: 641301 2 building, China World Trade Center tower, 6 CHENFENG Road, Yanjiang District, Ziyang, Sichuan. Patentee after: Sichuan sharing Casting Co., Ltd. Address before: 641300 2 building, China World Trade Center tower, 6 CHENFENG Road, Yanjiang District, Ziyang, Sichuan. Patentee before: SICHUAN NANCHE GONGXIANG CASTING CO., LTD. |