CN105158145B - Resin-bonded sand cast form surface degree of packing assay method - Google Patents
Resin-bonded sand cast form surface degree of packing assay method Download PDFInfo
- Publication number
- CN105158145B CN105158145B CN201510646528.0A CN201510646528A CN105158145B CN 105158145 B CN105158145 B CN 105158145B CN 201510646528 A CN201510646528 A CN 201510646528A CN 105158145 B CN105158145 B CN 105158145B
- Authority
- CN
- China
- Prior art keywords
- resin
- packing
- form surface
- cast form
- bonded sand
- 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.)
- Active
Links
Landscapes
- Measuring Fluid Pressure (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of resin-bonded sand cast form surface degree of packing assay method, belongs to mo(U)ld face degree of packing determination techniques, and analyzer of the invention includes a container for being provided with opening, the gentle stream interface of air gauge is connected with container.The assay method of the present invention is that the opening of the container of analyzer is in close contact on measured resin-bonded sand cast form surface, and constant pressure air-flow is uninterruptedly passed through into container, observes air gauge, after air gauge stable reading, reads stable atmospheric pressure value Px；The measured resin-bonded sand cast form surface degree of packing is calculated according to (Px P0)/(P100 P0) × 100%, for wherein P0 for the resin sand of same granularity in a loose state to determine the stable atmospheric pressure value that Px method measures, P100 is standard specimen made from the resin sand paddle type mill sampling machine of same granularity to determine the stable atmospheric pressure value that Px method measures.The present invention is by determining the gas permeability of mo(U)ld face come the degree of packing of indirect assessment mo(U)ld face, the accurate performance indications for grasping resin-bonded sand cast form, ensures the quality of casting.
Description
Technical field
The invention belongs to mo(U)ld face degree of packing determination techniques, specifically a kind of resin-bonded sand cast form surface degree of packing measure side
Method.
Background technology
In modern Foundry Production, widely use organic resin and carry out sand conditioning as bonding agent instead of clay.With tree
The casting mold that fat sand makes has the characteristics that intensity height, dimensional accuracy height, surfacing, need not dried.But resin is at 500 DEG C or so
Will completely burned carbonization, lose intensity.Therefore, after casting pouring, press close to a range of molding sand of casting and just lose by force
Degree, in the presence of molten metal pressure, the type wall of casting mold migrates, so as to influence the dimensional accuracy of casting.To spheroidal graphite cast-iron
For this metal with mushy freezing feature, the migration of type wall greatly weakens spheroidal graphite cast-iron in process of setting because of stone
Ink separates out the shrinkage cavity and porosity defect from feeding capacity, easily formation casting brought.Obviously, the surface quality of casting mold is to casting
Quality have a great impact.However, the detection method to mo(U)ld face quality is usually to detect the intensity of mo(U)ld face at present,
It was found from description above, so do with significant limitation, it is impossible to which real embodiment casting mold occurs under the effect of high temperature iron liquid
Change.Although resin-bonded sand cast form has higher intensity at normal temperatures, in the presence of high temperature iron liquid, resin carbonation, lose
Go intensity, the mechanicals efforts of formation are inlayed mutually, are engaged in the maintenance of mo(U)ld face shape between relying primarily on sand grains, that is,
Say, at high temperature, the surface strength of casting mold there are much relations with molding sand consolidation, the degree of compression, the i.e. degree of packing.But at present
Also without the method and instrument of the measurement mo(U)ld face degree of packing.
The content of the invention
The technical problem to be solved in the present invention and the technical assignment proposed are to overcome prior art tight to mo(U)ld face
A kind of the defects of solidity is measured, there is provided resin-bonded sand cast form surface degree of packing assay method.
To achieve the object of the present invention, resin-bonded sand cast form surface compactness tester of the invention, it is characterized in that including one
Container provided with opening, the gentle stream interface of air gauge is connected with described container.
Optimization technique means as resin-bonded sand cast form surface of the present invention compactness tester：Connect on described air-flow interface
It is connected to constant pressure source of the gas.
Optimization technique means as resin-bonded sand cast form surface of the present invention compactness tester：Have around the opening
Ring-shaped edge.Sealing ring is configured with described ring-shaped edge.The width of the ring-shaped edge is the opening maximum caliber
0.3-0.8 times.
To achieve the object of the present invention, resin-bonded sand cast form surface degree of packing assay method of the invention, it is characterized in that：
(1) by the opening of the container of the resin-bonded sand cast form surface compactness tester any one of claim 1-6
It is in close contact on measured resin-bonded sand cast form surface, constant pressure air-flow is uninterruptedly passed through into container, observes air gauge, treat air pressure
After meter reading is stable, stable atmospheric pressure value Px is read；
(2) degree of packing of the resin sand of same granularity under the loose condition (of surface) is set as 0, will be any in claim 1-6
The opening of the container of resin-bonded sand cast form surface compactness tester described in is in close contact the same granularity in loose condition (of surface)
On resin sand, constant pressure air-flow is uninterruptedly passed through into container, air gauge is observed, after air gauge stable reading, reads the shape body
Stable atmospheric pressure value P0；
(3) degree of packing of standard specimen made from the resin sand paddle type mill sampling machine of same granularity is set as 100%,
The opening of the container of resin-bonded sand cast form surface compactness tester any one of claim 1-6 is in close contact and marked
The surface of quasi- sample, constant pressure air-flow is uninterruptedly passed through into container, observes air gauge, after air gauge stable reading, reading should
The stable atmospheric pressure value P100 of shape body；
(4) the measured resin-bonded sand cast form surface degree of packing is calculated according to the following equation：
The resin-bonded sand cast form surface degree of packing=(Px-P0)/(P100-P0) × 100%；
(1), (2), (3) require without priority but must be before (4) between each other.
The beneficial effects of the invention are as follows：By determining the gas permeability of mo(U)ld face, carry out the consolidation of indirect assessment mo(U)ld face
Degree, practical reference data is provided for the quality control of resin-bonded sand cast form, ensures that casting pouring is smoothed out and the quality of casting.
Brief description of the drawings
Fig. 1 is a kind of structure and its measure resin-bonded sand cast form surface of resin-bonded sand cast form surface of the present invention compactness tester
The schematic diagram of the degree of packing；
Label declaration in figure：01- containers, 02- openings, 03- air gauges, 04- air-flow interfaces, 05- ring-shaped edges, 06- castings
Type surface.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The resin-bonded sand cast form surface compactness tester of the present invention is as shown in figure 1, it includes a container for being provided with opening 02
01, the gentle stream interface 04 of air gauge 03 is connected with container 01.
Based on the analyzer shown in Fig. 1, resin-bonded sand cast form surface degree of packing assay method of the invention includes following operation：
(1) opening 02 of the container 01 of the resin-bonded sand cast form surface compactness tester shown in Fig. 1 is in close contact in quilt
The resin-bonded sand cast form surface 07 of measure, constant pressure air-flow is uninterruptedly passed through into container, observes air gauge, treat air gauge stable reading
Afterwards, stable atmospheric pressure value Px is read；
(2) degree of packing of the resin sand of same granularity under the loose condition (of surface) is set as 0, by the Reform of Resin Sand Casting shown in Fig. 1
The opening of the container of type surface compactness tester is in close contact on the resin sand of the same granularity of loose condition (of surface), into container
Uninterruptedly it is passed through constant pressure air-flow and ends, observes air gauge, after air gauge stable reading, read the stable atmospheric pressure value of the shape body
P0；
(3) degree of packing of standard specimen made from the resin sand paddle type mill sampling machine of same granularity is set as 100%,
The opening of the container of resin-bonded sand cast form surface compactness tester shown in Fig. 1 is in close contact on the surface of standard specimen, to
Constant pressure air-flow is uninterruptedly passed through in container, air gauge is observed, after air gauge stable reading, reads the stable atmospheric pressure value of the shape body
P100；
(4) the measured resin-bonded sand cast form surface degree of packing is calculated according to the following equation：
The resin-bonded sand cast form surface degree of packing=(Px-P0)/(P100-P0) × 100%；
(1), (2), (3) require without priority but must be before (4) between each other.
It is known that the sand grains size of roughing sand used in resin sand is than more uniform, that is to say, that the concentration degree of roughing sand granularity is very
Height, the gap between sand grains is larger, good permeability.After moulding consolidation, the interval between sand grains is substantially reduced, casting mold it is saturating
Gas can change significantly.More consolidation, the gap between sand grains is smaller, and the gas permeability of casting mold is lower.That is, casting mold is tight
A kind of inverse relation is presented in solidity and gas permeability.Accordingly, it is possible to the gas permeability by determining mould surface, carrys out indirect assessment sand
The degree of packing on type surface.Gas permeability is actually to reflect sand mold to the resistance by gas.Gap between sand grains is bigger, to logical
The resistance of gas is crossed with regard to smaller, vice versa.So the characterizing method of mould permeability is such, with constant pressure
Gas is by mo(U)ld face, and at this moment, the height of gas-static is just used for characterizing the size of gas permeability, and static pressure is higher, represents casting mold
The gas permeability on surface is lower；Static pressure is lower, represents that the gas permeability of mo(U)ld face is higher.Analyzer shown in Fig. 1 is exactly according to upper
State principle design.
For the ease of being passed through pressure air, constant pressure source of the gas is connected with air-flow interface 04, the constant pressure source of the gas be preferably not between
The pump devices such as the micro-air compressor of disconnected conveying compressed air.
It is accurate in order to measure, there is ring-shaped edge 05, the preferably cylindrical shape of container 01, ring-shaped edge around opening
05 should have enough width be used for ensure and casting mold there is larger contact surface, the width of ring-shaped edge is the maximum caliber of opening 02
0.3-0.8 times be advisable（Opening can with rectangle, can also be circle, its maximum caliber is the longer side of rectangle when being rectangle,
To be diameter during circle）, flow a gas through the path long enough at vessel port edge, avoid the path it is shorter cause air-flow from this
Appear rather than the wall through casting mold.In order to avoid losing heart, sealing ring is configured with ring-shaped edge, is being cast by sealing ring contact
Type surface.
Air-flow interface 04 is used to connect any type of source of the gas（Air compressor including uninterrupted conveying compressed air etc.
Gas generating unit）.
One example such as, with the resin sand of 40/70 granularity establishes model, and it is 100Pa to measure P0, P100 180Pa, and 40/
After 70 granularity phenolic sand moldings, the stable atmospheric pressure value Px for measuring mo(U)ld face is 172Pa, then the degree of packing of casting mold is：（172-
100）/（180-100）× 100%=90%.
Claims (5)
1. resin-bonded sand cast form surface degree of packing assay method, it is characterized in that：
Prepare a resin-bonded sand cast form surface compactness tester, described resin-bonded sand cast form surface compactness tester is set including one
There is opening（02）Container（01）, described container（01）On be connected with air gauge（03）Gentle stream interface（04）；According to following
Step is measured：
(1) by the container of resin-bonded sand cast form surface compactness tester（01）Opening（02）It is in close contact in measured tree
Fat sand mo(U)ld face（07）, constant pressure air-flow is uninterruptedly passed through into container, observes air gauge, after air gauge stable reading, is read
Take stable atmospheric pressure value Px；
(2) degree of packing of the resin sand of same granularity in a loose state is set as 0, described resin-bonded sand cast form surface is tight
The opening of the container of solidity analyzer is in close contact on the resin sand of the same granularity of loose condition (of surface), is uninterruptedly led into container
Enter constant pressure air-flow, observe air gauge, after air gauge stable reading, read the stable atmospheric pressure value P0 of the loose condition (of surface)；
(3) degree of packing of standard specimen made from the resin sand paddle type mill sampling machine of same granularity is set as 100%, by institute
The opening of the container for the resin-bonded sand cast form surface compactness tester stated is in close contact on the surface of standard specimen, into container not
Interruption is passed through constant pressure air-flow, observes air gauge（03）, after air gauge stable reading, read the stable atmospheric pressure value of the state
P100；
(4) the measured resin-bonded sand cast form surface degree of packing is calculated according to the following equation：
The resin-bonded sand cast form surface degree of packing=(Px-P0)/(P100-P0) × 100%；
(1), (2), (3) require without priority but must be before (4) between each other.
2. resin-bonded sand cast form surface degree of packing assay method according to claim 1, it is characterized in that：Described air-flow interface
（04）On be connected with constant pressure source of the gas.
3. resin-bonded sand cast form surface degree of packing assay method according to claim 1, it is characterized in that：Around the opening
With ring-shaped edge（05）.
4. resin-bonded sand cast form surface degree of packing assay method according to claim 3, it is characterized in that：Described ring-shaped edge
（05）On be configured with sealing ring.
5. resin-bonded sand cast form surface degree of packing assay method according to claim 3, it is characterized in that：The ring-shaped edge
（05）Width be opening 0.3-0.8 times of maximum caliber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510646528.0A CN105158145B (en) | 2015-10-09 | 2015-10-09 | Resin-bonded sand cast form surface degree of packing assay method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510646528.0A CN105158145B (en) | 2015-10-09 | 2015-10-09 | Resin-bonded sand cast form surface degree of packing assay method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105158145A CN105158145A (en) | 2015-12-16 |
| CN105158145B true CN105158145B (en) | 2018-03-23 |
Family
ID=54799080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510646528.0A Active CN105158145B (en) | 2015-10-09 | 2015-10-09 | Resin-bonded sand cast form surface degree of packing assay method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105158145B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547968B (en) * | 2016-03-11 | 2018-05-08 | 东南大学 | A kind of diffused concrete surface layer anti-permeability performance test equipment and its test method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4959994A (en) * | 1988-10-11 | 1990-10-02 | Ilmari Paakkinen | Method of and an arrangement for measuring the properties of a stiff mass to be compacted |
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| CN1049055A (en) * | 1990-07-31 | 1991-02-06 | 李大勇 | The new method of fast measuring molding sand mould permeability |
| CN2159023Y (en) * | 1993-04-16 | 1994-03-16 | 张瑞福 | Permeating-type grain size testing instrument |
| CN1147632A (en) * | 1995-04-28 | 1997-04-16 | 新东工业株式会社 | Apparatus for measuring air permeability of molding sand |
| US6161422A (en) * | 1995-11-03 | 2000-12-19 | Hartley Controls Corporation | Sand testing method and apparatus |
| CN1601278A (en) * | 2004-10-22 | 2005-03-30 | 哈尔滨理工大学 | Parameter analysis method and device for wetting clay sand quality for casting |
| CN103048255A (en) * | 2012-12-27 | 2013-04-17 | 南昌航空大学 | Device and method for testing air permeability of investment precision casting shells |
| CN204964344U (en) * | 2015-10-09 | 2016-01-13 | 浙江佳力风能技术有限公司 | Resin sand mo(U)ld face compactness tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230890A (en) * | 1998-02-10 | 1999-08-27 | Sumitomo Metal Mining Co Ltd | Method for measuring gas permeability of alc semiplastic body |
-
2015
- 2015-10-09 CN CN201510646528.0A patent/CN105158145B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4959994A (en) * | 1988-10-11 | 1990-10-02 | Ilmari Paakkinen | Method of and an arrangement for measuring the properties of a stiff mass to be compacted |
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| CN1049055A (en) * | 1990-07-31 | 1991-02-06 | 李大勇 | The new method of fast measuring molding sand mould permeability |
| CN2159023Y (en) * | 1993-04-16 | 1994-03-16 | 张瑞福 | Permeating-type grain size testing instrument |
| CN1147632A (en) * | 1995-04-28 | 1997-04-16 | 新东工业株式会社 | Apparatus for measuring air permeability of molding sand |
| US6161422A (en) * | 1995-11-03 | 2000-12-19 | Hartley Controls Corporation | Sand testing method and apparatus |
| CN1601278A (en) * | 2004-10-22 | 2005-03-30 | 哈尔滨理工大学 | Parameter analysis method and device for wetting clay sand quality for casting |
| CN103048255A (en) * | 2012-12-27 | 2013-04-17 | 南昌航空大学 | Device and method for testing air permeability of investment precision casting shells |
| CN204964344U (en) * | 2015-10-09 | 2016-01-13 | 浙江佳力风能技术有限公司 | Resin sand mo(U)ld face compactness tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105158145A (en) | 2015-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Amira et al. | Method to determine hot permeability and strength of ceramic shell moulds | |
| CN110672494B (en) | Method for rapidly measuring different porosities of porous concrete | |
| CN105158145B (en) | Resin-bonded sand cast form surface degree of packing assay method | |
| JPS59163537A (en) | Method and device for manufacturing test piece of mold material mixture used for measuring various characteristic | |
| CN201527387U (en) | On-line detecting instrument for molding sand | |
| CN103100668B (en) | Engine cylinder block casting mould | |
| CN103792120A (en) | Test mold for detecting strength of centrifugal concrete and detection method for strength of centrifugal concrete | |
| CN204964344U (en) | Resin sand mo(U)ld face compactness tester | |
| CN101598653B (en) | Method for detecting gas-permeable nozzle bricks and device thereof | |
| CN205080031U (en) | Sand permeability detection device | |
| CN104977396B (en) | Great fluidity concrete template lateral pressure simulation test method and test device | |
| Reddy et al. | A new technique for measurement of the strength of ceramic shells in the precision casting process | |
| Wan et al. | Research on testing method of resin sand high temperature compressive strength | |
| Abdullah et al. | Testing for green compression strength and permeability properties on the tailing sand samples gathered from Ex Tin Mines in Perak State, Malaysia | |
| CN204286947U (en) | Green-sand hot green tensile strength proving installation | |
| CN107870227B (en) | Method and device for detecting apparent porosity of artificial sand | |
| CN208483175U (en) | A kind of core mould structure of the subsidiary main sample cylinder of permeability test | |
| CN107843535A (en) | The measurement apparatus and method of hot-spraying coating connectivity porosity relative quantity | |
| CN208091484U (en) | A kind of molding sand Online Monitoring Control device | |
| JP2008224407A (en) | Quality evaluation method for tubular refractory material | |
| CN207223054U (en) | A kind of molding cutter | |
| US20210402462A1 (en) | Green sand mold forming sensor and green sand mold formability evaluation method | |
| US20220055098A1 (en) | Green sand mold molding sensor and green sand mold moldability evaluation method | |
| Branscomb | A New Method of Measuring Green and Fired Permeability of Investment Casting Shells | |
| CN106092873A (en) | The measurement apparatus of green-sand compact rate of molding water content cleavage strength and acquisition methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |