CN102527976B - Preparation process for compound sand core for centrifugal cast pipe socket - Google Patents
Preparation process for compound sand core for centrifugal cast pipe socket Download PDFInfo
- Publication number
- CN102527976B CN102527976B CN 201210042128 CN201210042128A CN102527976B CN 102527976 B CN102527976 B CN 102527976B CN 201210042128 CN201210042128 CN 201210042128 CN 201210042128 A CN201210042128 A CN 201210042128A CN 102527976 B CN102527976 B CN 102527976B
- Authority
- CN
- China
- Prior art keywords
- metal
- cored
- molding sand
- core
- 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
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a preparation process for a compound sand core for a centrifugal cast pipe socket, which belongs to the technical field of preparation processes for metal casting sand cores. The preparation process includes the steps: firstly, manufacturing a proper metal core frame; secondly, placing the metal core frame in a core box and filling casting sand into a casting sand forming cavity formed between the core box and the metal core frame; thirdly, compacting the casting sand to firmly fix the casting sand with the metal core frame; fourthly, taking the compound sand core out of the core box; and fifthly, cleaning up the metal core frame and reusing the metal core frame by returning to the second step. The metal core frame partially replaces the casting sand, consumption of the casting sand is decreased, and environmental pollution is reduced. In addition, the strength and the stability of the compound sand core are improved by the aid of the metal core frame, consumption of curing agents in the casting sand is reduced by controlling the temperature of a metal core frame, and excessive dependence on working environments is greatly weakened.
Description
Technical field
The invention belongs to metal casting with the fabricating technology field of core, relate in particular to a kind of spun cast pipe bellmouth with the preparation technology of compound core.
Background technology
At present, centrifugal casting technique is very ripe.But be subjected to the restriction of pattern draft, moulding often adopts whole cores to make or molding sand composite portion arbor is made, in order to take into account low cost and the demand that satisfies working strength.Especially in the spun cast pipe field, the bellmouth casting all adopts molding sand to finish.A large amount of disposable cores, not only waste material causes cost rising, environmental pollution, and complex manufacturing technology, and percent defective is higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of spun cast pipe bellmouth with the preparation technology of compound core, has that the molding sand use amount is few, environmental pollution is little, yield rate is high and advantages of high strength.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of spun cast pipe bellmouth is characterized in that step is as follows with the preparation technology of compound core:
Step 1 is made metal-cored according to the external form of cast tube bellmouth, and metal-cored comprises metal-cored outer ring and metal-cored inner ring, and metal-cored outer ring is connected by disc or spoke with metal-cored inner ring;
Step 2, be placed on making cast tube bellmouth with in the core box of core with metal-cored, with the molding sand that is mixed with low amounts of resin and curing agent from metal-cored inner ring, metal-cored outer ring and disc or the formed molding sand entrance of spoke be injected into metal-cored with the formed molding sand molding cavity of core box, use metal-cored alternative part molding sand;
Step 3 adopts vibrating head to stretch in the molding sand molding cavity from the molding sand porch, with the molding sand vibration compacting; Perhaps adopt vibrating device, be placed on the bottom of core box, with core box and metal-cored common vibration, reach the purpose with molding sand jolt ramming, make molding sand and metal-cored fixation;
Step 4 is separated the left half module of core box with right half module, compound core is taken out from core box, at the outer surface brush releasing agent of compound core.
Described preparation technology also comprises step 5: the complex sand core metal core frame of finishing using keeps uniform temperature, after cleaning out, molding sand on metal-cored changes temperature bath with being attached to over to, water heat-shift in metal-cored and the temperature bath, with metal-cored temperature control be transferred to after between room temperature to the 60 ° C step 2 carry out compound core repeat make.
The beneficial effect that adopts technique scheme to produce is: by metal-cored use, part is sand substituted, has reduced the use amount of molding sand, has also reduced the use amount of resin and triethylamine simultaneously, has reduced the pollution to environment; In addition, by intensity and the stability of using metal-cored to improve compound core, yield rate height; By the control to metal-cored body temperature, reduced the use amount of curing agent in the molding sand, the depending on unduly working environment of having weakened greatly simultaneously.When making metal-cored outer ring, increase the thickness of outer ring consciously, on the thermodyn process centrifugal tube casting machine, can replace the use of pressing central layer, reduced by a procedure, improved production efficiency.Metal-cored outer ring and inner ring are taked former or spoke connected mode, have both guaranteed that the adding molding sand was more convenient, have guaranteed the bonding strength of metal-cored outer ring and inner ring again, have improved metal-cored service life.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the plan structure schematic diagram of compound core among the present invention;
Fig. 2 be among Fig. 1 A-A to the sectional structure schematic diagram;
The sectional structure schematic diagram of core box and compound core when Fig. 3 is to use core box to make compound core;
Fig. 4 is that described compound core uses state sectional structure schematic diagram;
Wherein: 1, metal-cored outer ring 2, metal-cored inner ring 3, molding sand layer 4, disc 5, molding sand entrance 6, core box 7, metal casting product 8, centrifugal tube casting machine.
The specific embodiment
Shown in Fig. 1-2, the compound core of a kind of casting cast tube bellmouth comprises metal-cored and molding sand layer 3.Described metal-cored comprises metal-cored outer ring 1 and metal-cored inner ring 2, described metal-cored outer ring 1 is fixedly connected on the upper end of described metal-cored inner ring 2 by disc 4 or spoke, and the outer wall of the inwall of described metal-cored outer ring 1 and described metal-cored inner ring 2 is provided with and fixes the sand groove.Be solidified with molding sand layer 3 on the outer wall of described metal-cored inner ring 2 and between described metal-cored outer ring 1 and metal-cored inner ring 2.
As shown in Figure 3, a kind of spun cast pipe bellmouth is characterized in that step is as follows with the preparation technology of compound core:
Step 1 is made metal-cored according to the external form of cast tube bellmouth, and metal-cored comprises metal-cored outer ring 1 and metal-cored inner ring 2, and metal-cored outer ring 1 is connected by disc 4 or spoke with metal-cored inner ring 2;
Step 2, be placed on making cast tube bellmouth with in the core box 6 of core with metal-cored, with the molding sand that is mixed with low amounts of resin and curing agent from metal-cored inner ring 2, metal-cored outer ring 1 and disc 4 or the formed molding sand entrance 5 of spoke be injected into metal-cored with core box 6 formed molding sand molding cavities, use metal-cored alternative part molding sand;
Step 3 adopts vibrating head to stretch in the molding sand molding cavity from molding sand entrance 5, with the molding sand vibration compacting; Perhaps adopt vibrating device, be placed on the bottom of core box 6, with core box 6 and metal-cored common vibration, reach the purpose with molding sand jolt ramming, make molding sand and metal-cored fixation;
Step 4 is separated the left half module of core box with right half module, compound core is taken out from core box, at the outer surface brush releasing agent of compound core;
Step 5, the compound core of finishing using, metal-cored keeps uniform temperature, after cleaning out, molding sand on metal-cored changes temperature bath with being attached to over to, water heat-shift in metal-cored and the temperature bath, with the control of metal-cored temperature between room temperature to 60 ° C, be transferred to after (take off limit summer, winter capping) step 2 carry out compound core repeat make.
As shown in Figure 4, use state sectional structure schematic diagram for compound core.By metal-cored use, part is sand substituted, has reduced the use amount of molding sand, has also reduced the use amount of resin and triethylamine simultaneously, has reduced the pollution to environment; In addition, by intensity and the stability of using metal-cored to improve compound core, yield rate height; By the control to metal-cored body temperature, reduced the use amount of curing agent in the molding sand, the depending on unduly working environment of having weakened greatly simultaneously.When making metal-cored outer ring, increase the thickness of outer ring consciously, on the thermodyn process centrifugal tube casting machine, can replace the use of pressing central layer, reduced by a procedure, improved production efficiency.Metal-cored outer ring 1 and inner ring are taked former or spoke connected mode, have both guaranteed that the adding molding sand was more convenient, have guaranteed the bonding strength of metal-cored outer ring 1 and inner ring again, have improved metal-cored service life.
Claims (1)
1. a spun cast pipe bellmouth is characterized in that step is as follows with the preparation technology of compound core:
Step 1 is made metal-cored according to the external form of cast tube bellmouth, and metal-cored comprises metal-cored outer ring (1) and metal-cored inner ring (2), and metal-cored outer ring (1) is connected by disc (4) or spoke with metal-cored inner ring (2);
Step 2, be placed on making cast tube bellmouth with in the core box (6) of core with metal-cored, with the molding sand that is mixed with low amounts of resin and curing agent from metal-cored inner ring (2), metal-cored outer ring (1) and disc (4) or the formed molding sand entrance of spoke (5) be injected into metal-cored with the formed molding sand molding cavity of core box (6), use metal-cored alternative part molding sand;
Step 3 adopts vibrating head to stretch in the molding sand molding cavity from molding sand entrance (5), with the molding sand vibration compacting; Perhaps adopt vibrating device, be placed on the bottom of core box (6), with core box (6) and metal-cored common vibration, reach the purpose with molding sand jolt ramming, make molding sand and metal-cored fixation;
Step 4 is separated the left half module of core box with right half module, compound core is taken out from core box (6), at the outer surface brush releasing agent of compound core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210042128 CN102527976B (en) | 2012-02-23 | 2012-02-23 | Preparation process for compound sand core for centrifugal cast pipe socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210042128 CN102527976B (en) | 2012-02-23 | 2012-02-23 | Preparation process for compound sand core for centrifugal cast pipe socket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102527976A CN102527976A (en) | 2012-07-04 |
| CN102527976B true CN102527976B (en) | 2013-09-11 |
Family
ID=46336694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210042128 Active CN102527976B (en) | 2012-02-23 | 2012-02-23 | Preparation process for compound sand core for centrifugal cast pipe socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527976B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195704B (en) * | 2015-02-04 | 2017-05-17 | 镇江市丹徒区环宇轧辊厂 | Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same |
| CN105537501A (en) * | 2015-11-27 | 2016-05-04 | 沪东重机有限公司 | Application method of modeling sand substituting blocks in casting of large cast steel |
| CN108723322B (en) * | 2018-05-24 | 2020-02-21 | 武汉雄驰机电设备有限公司 | Centrifugal casting method for large-size double-flange copper alloy shaft sleeve or copper alloy bearing bush |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516792A (en) * | 1978-07-25 | 1980-02-05 | Kubota Ltd | Core for molding faucet of centrifugal cast-iron pipe |
| JPS5659573A (en) * | 1979-10-22 | 1981-05-23 | Kubota Ltd | Centrifugal casting apparatus |
| CN101786148B (en) * | 2009-08-24 | 2012-02-01 | 张振军 | Centrifugal pipe casting machine varied diameter metal bellmouthed core |
| CN101716666B (en) * | 2009-12-30 | 2011-09-28 | 安阳钢铁股份有限公司 | Drawing process of conical ductile cast-iron pipe |
-
2012
- 2012-02-23 CN CN 201210042128 patent/CN102527976B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102527976A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527976B (en) | Preparation process for compound sand core for centrifugal cast pipe socket | |
| CN101992265B (en) | Method for manufacturing resin casting die used for modeling sodium silicate self-hardening sand | |
| CN202895457U (en) | Centrifugal shaping mold of high-strength cone-shaped concrete pole | |
| CN103447463A (en) | Method for improving finished product rate of evaporated pattern casting of holes and inner cavities | |
| CN201558902U (en) | Wheel spinning mold | |
| CN202447625U (en) | Composite sand core for centrifugal cast tube bellmouth | |
| CN201132201Y (en) | Combined casting die with metal inner core | |
| CN102430700A (en) | Method for single box casting of glass mold copper alloy bottom mold by rein sand | |
| CN105215287A (en) | A kind of valve body evaporative pattern and using method thereof | |
| CN203235907U (en) | Connecting piece casting sand mould | |
| CN102699273A (en) | Precision casting method for large-scale aluminium alloy impeller | |
| CN102756095A (en) | Casting process of diesel engine | |
| CN102825214B (en) | Method for manufacturing mold casing of flanging pouring cup in investment casting process | |
| CN205270747U (en) | A pouring mechanism for wheel hub lost -foaming casting process | |
| CN202029228U (en) | Pouring and suction filtering forming die | |
| CN104084538A (en) | Metal part casting method | |
| CN101628320A (en) | Lost foam casting method of automobile medium bridge composite shell casting | |
| CN201848505U (en) | Wheel mould capable of reducing loosening of riser | |
| CN203265545U (en) | Die used on continuous casting production line | |
| CN202683968U (en) | Large-size slag pot one-step molding die | |
| CN214517412U (en) | Lost foam mold with connecting piece | |
| CN106825442A (en) | Sandbox vibrating device | |
| CN102434622B (en) | Manufacture method for rubber mount structure | |
| CN101543876B (en) | Method for molding green sand core of T-shaped junction box | |
| CN202283762U (en) | Rubber-mounting manufacturing mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |