CN111702937A - Precast concrete member forming process and forming device thereof - Google Patents
Precast concrete member forming process and forming device thereof Download PDFInfo
- Publication number
- CN111702937A CN111702937A CN202010538517.1A CN202010538517A CN111702937A CN 111702937 A CN111702937 A CN 111702937A CN 202010538517 A CN202010538517 A CN 202010538517A CN 111702937 A CN111702937 A CN 111702937A
- Authority
- CN
- China
- Prior art keywords
- die
- cavity
- closing
- closing cavity
- precast concrete
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/006—Pressing by atmospheric pressure, as a result of vacuum generation or by gas or liquid pressure acting directly upon the material, e.g. jets of compressed air
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
The invention discloses a precast concrete member molding process, which comprises the following steps: the method comprises the following steps: preparing concrete; step two: respectively installing an upper die and a lower die in an upper closing cavity and a lower closing cavity; step three: cleaning the die, cleaning the molding surfaces of the die cavity of the upper die and the die cavity of the lower die, cleaning the contact position of the upper die and the lower die, and coating a layer of release agent on the molding surfaces of the die cavity of the upper die and the die cavity of the lower die; step four: placing the fixed profile steel in a die cavity of the lower die; step five: pre-closing the upper closing cavity and the lower closing cavity, and vacuumizing the interiors of the closed upper closing cavity and the closed lower closing cavity; step six: closing the upper die and the lower die, then injecting the pre-stirred concrete into a die cavity of the die, and continuously folding the upper die and the lower die towards the middle part to realize pressure maintaining and shaping; step six: and demolding and taking out the concrete member after pressure maintaining and shaping.
Description
Technical Field
The invention relates to the field of concrete members, in particular to a precast concrete member forming process and a precast concrete member forming device.
Background
At present, concrete prefabricated parts are widely applied and relate to overhead bridges, subway shield segments, PC prefabricated parts and the like. The concrete prefabricated part forming process comprises the modes of mechanical vibration, attached pneumatic vibration, electromagnetic vibration, platform vibration and the like.
However, the compactness of the small concrete prefabricated part produced on the market at present is poor, the production cost is high, and the small concrete prefabricated part is easy to contact with air in the forming process of the concrete prefabricated part, so that bubbles are formed inside and on the surface of the produced concrete prefabricated part, and after the concrete is hardened, the undamaged bubbles form pores, and the compression strength and the appearance quality of the prefabricated part are adversely affected.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
The precast concrete member molding process comprises the following steps:
the method comprises the following steps: preparing concrete;
step two: respectively installing an upper die and a lower die in an upper closing cavity and a lower closing cavity;
step three: cleaning the die, cleaning the molding surfaces of the die cavity of the upper die and the die cavity of the lower die, cleaning the contact position of the upper die and the lower die, and coating a layer of release agent on the molding surfaces of the die cavity of the upper die and the die cavity of the lower die;
step four: placing the fixed profile steel in a die cavity of the lower die;
step five: pre-closing the upper closing cavity and the lower closing cavity, and vacuumizing the interiors of the closed upper closing cavity and the closed lower closing cavity;
step six: closing the upper die and the lower die, then injecting the pre-stirred concrete into a die cavity of the die, and continuously folding the upper die and the lower die towards the middle part to realize pressure maintaining and shaping;
step six: and demolding and taking out the concrete member after pressure maintaining and shaping.
Precast concrete member forming device includes: the device comprises a workbench, wherein a bracket of a portal frame structure is arranged on the workbench, a pre-mold closing hydraulic cylinder is arranged at the upper end of a beam of the bracket, and a hydraulic rod of the hydraulic cylinder moves downwards in a telescopic manner;
an upper closing cavity is mounted on a hydraulic rod of the hydraulic cylinder, the upper closing cavity is hollow, and the lower end face of the upper closing cavity is communicated;
an upper die is arranged in the upper closing cavity, a feeding port is formed in the upper die, a material pipe is arranged on the feeding port, one section of the material pipe is communicated with the die cavity of the upper die, and the other end of the material pipe penetrates through the upper closing cavity to be communicated with feeding equipment;
a material pipe opening through which the material feeding pipe penetrates is formed in the upper closing cavity;
a lower closing cavity matched with the upper closing cavity for working is arranged on the workbench, the lower closing cavity is hollow, the upper end surface of the lower closing cavity is communicated, and a lower die matched with the upper die for working is arranged in the lower closing cavity;
the lower end of the lower die is provided with a die assembly hydraulic cylinder with a hydraulic rod capable of stretching upwards, and the hydraulic rod of the die assembly hydraulic cylinder is connected with the lower end face of the lower die;
further comprising: and the vacuum pump is communicated with the inner part of the lower cavity through an air pipe.
Compared with the prior art, the invention has the beneficial effects that: the method for vacuumizing and pressure-maintaining molding can effectively and rapidly discharge air bubbles in the concrete and reduce the contact of the concrete with air as much as possible during molding, thereby effectively reducing the air bubbles in and on the surface of the precast concrete member and improving the compressive strength and the appearance surface quality; especially for the concrete prefabricated part with a complex structure, the internal air bubbles are difficult to remove by the traditional vibration method, and the air bubbles can be quickly removed by combining the vacuum and pressure maintaining processes.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a precast concrete unit forming apparatus includes: the device comprises a workbench 1, wherein a support 2 of a portal frame structure is arranged on the workbench 1, a pre-mold-closing hydraulic cylinder 3 is arranged at the upper end of a cross beam of the support 2, and a hydraulic rod of the pre-mold-closing hydraulic cylinder 3 extends and retracts downwards;
an upper closing cavity 4 is mounted on a hydraulic rod of the pre-closing hydraulic cylinder 3, the upper closing cavity 4 is hollow, and the lower end face of the upper closing cavity 4 is communicated;
an upper die 5 is arranged in the upper closing cavity 4, a feeding port (not shown) is formed in the upper die 5, a material pipe 6 is arranged on the feeding port, one section of the material pipe 6 is communicated with a die cavity of the upper die 5, and the other end of the material pipe 6 penetrates through the upper closing cavity 4 to be communicated with a feeding device 7, wherein the feeding device 7 needs to have a stirring effect, and when concrete is stored, continuous stirring treatment needs to be carried out to avoid solidification of the internal concrete;
a material pipe opening (not shown) through which the material supply pipe 6 penetrates is arranged on the upper closing cavity 4;
a lower closing cavity 8 matched with the upper closing cavity 4 for working is arranged on the workbench 1, the lower closing cavity 8 is hollow, the upper end surface of the lower closing cavity 8 is communicated, and a lower die 9 matched with the upper die 5 for working is arranged in the lower closing cavity 8;
the lower end of the lower die 9 is provided with a die closing hydraulic cylinder 10 with a hydraulic rod capable of stretching upwards, and the hydraulic rod of the die closing hydraulic cylinder 10 is connected with the lower end face of the lower die 9;
the pre-closing hydraulic cylinder 3 drives the upper closing cavity 4 to descend and closes the die with the lower closing cavity 8 to complete the pre-closing work;
the die-closing hydraulic cylinder 10 drives the lower die 9 to ascend and the upper die 5 to realize die-closing work;
the die closing hydraulic cylinder 10 and the pre-die closing hydraulic cylinder 3 work simultaneously to realize pressure maintaining work.
Further comprising: vacuum pump 11, vacuum pump 11 pass through the tuber pipe and close 8 inside intercommunications down, close the evacuation processing in the inside in chamber 4 and the lower chamber 8 of closing through vacuum pump 11 realization.
And a vacuum valve 12 for vacuum air leakage is arranged on the upper closing cavity 4, and the vacuum breaking operation is realized by opening the vacuum valve 12 after the work is finished.
The sealing ring is arranged at the position where the material pipe 6 is contacted with the material pipe opening, and the sealing ring can ensure that the material pipe opening cannot damage the vacuum environment when the vacuum environment is formed inside the upper closed cavity 4 and the lower closed cavity 8.
According to the device, the invention also provides a precast concrete member forming process, which comprises the following steps:
the method comprises the following steps: preparing concrete, and injecting the prepared concrete into a feeding device 7;
step two: respectively installing an upper die 5 and a lower die 9 into an upper closing cavity 4 and a lower closing cavity 8, and selecting different dies for the upper die 5 and the lower die 9 according to different products;
step three: cleaning the die, cleaning the die cavity of the upper die 5 and the molding surface of the die cavity of the lower die 9, and cleaning the contact position of the upper die 5 and the lower die 9, mainly cleaning possible impurities, and avoiding the influence on the compact die of the die assembly due to the existence of the impurities; then coating a layer of release agent on the molding surfaces of the mold cavity of the upper mold 5 and the mold cavity of the lower mold 9, wherein the uniform coating of the release agent is required to be ensured during coating;
step four: placing shaped steel in a die cavity of the lower die 9, wherein the shaped steel is selected according to different structures of products;
step five: pre-closing the upper closing cavity 4 and the lower closing cavity 8, vacuumizing the interiors of the closed upper closing cavity 4 and the closed lower closing cavity 8, and forming a vacuum environment in the interiors of the closed upper closing cavity 4 and the closed lower closing cavity 8 through vacuumizing;
step six: the upper die 5 and the lower die 9 are closed, then the concrete which is stirred in advance is injected into a die cavity of the die, and meanwhile, the upper die 5 and the lower die 9 are continuously closed towards the middle part to realize pressure maintaining and shaping;
step six: and demolding and taking out the concrete member after pressure maintaining and shaping.
In the first step, slump of the concrete needs to be detected when the concrete is prepared.
In the fifth step, the internal vacuum degrees of the upper chamber combination 4 and the lower chamber combination 8 are-0.03 MPa to-0.05 MPa.
And the pressure maintaining and shaping time in the sixth step is 30-50 min.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. The precast concrete member molding process is characterized by comprising the following steps of:
the method comprises the following steps: preparing concrete;
step two: respectively installing an upper die and a lower die in an upper closing cavity and a lower closing cavity;
step three: cleaning the die, cleaning the molding surfaces of the die cavity of the upper die and the die cavity of the lower die, cleaning the contact position of the upper die and the lower die, and coating a layer of release agent on the molding surfaces of the die cavity of the upper die and the die cavity of the lower die;
step four: placing the fixed profile steel in a die cavity of the lower die;
step five: pre-closing the upper closing cavity and the lower closing cavity, and vacuumizing the interiors of the closed upper closing cavity and the closed lower closing cavity;
step six: closing the upper die and the lower die, then injecting the pre-stirred concrete into a die cavity of the die, and continuously folding the upper die and the lower die towards the middle part to realize pressure maintaining and shaping;
step six: and demolding and taking out the concrete member after pressure maintaining and shaping.
2. The precast concrete unit molding process according to claim 1, wherein in the first step, slump detection of concrete is performed when the concrete is prepared.
3. The precast concrete unit forming process according to claim 1, wherein in the fifth step, the vacuum degree in the upper closed cavity and the lower closed cavity is-0.03 MPa to-0.05 MPa.
4. The precast concrete member molding process according to claim 1, wherein the pressure maintaining and setting time in the sixth step is 30-50 min.
5. Precast concrete unit molding apparatus, the precast concrete unit molding process according to any one of claims 1 to 4, characterized by comprising: the device comprises a workbench, wherein a bracket of a portal frame structure is arranged on the workbench, a pre-mold closing hydraulic cylinder is arranged at the upper end of a beam of the bracket, and a hydraulic rod of the hydraulic cylinder moves downwards in a telescopic manner;
an upper closing cavity is mounted on a hydraulic rod of the hydraulic cylinder, the upper closing cavity is hollow, and the lower end face of the upper closing cavity is communicated;
an upper die is arranged in the upper closing cavity, a feeding port is formed in the upper die, a material pipe is arranged on the feeding port, one section of the material pipe is communicated with the die cavity of the upper die, and the other end of the material pipe penetrates through the upper closing cavity to be communicated with feeding equipment;
a material pipe opening through which the material feeding pipe penetrates is formed in the upper closing cavity;
a lower closing cavity matched with the upper closing cavity for working is arranged on the workbench, the lower closing cavity is hollow, the upper end surface of the lower closing cavity is communicated, and a lower die matched with the upper die for working is arranged in the lower closing cavity;
the lower end of the lower die is provided with a die assembly hydraulic cylinder with a hydraulic rod capable of stretching upwards, and the hydraulic rod of the die assembly hydraulic cylinder is connected with the lower end face of the lower die;
further comprising: and the vacuum pump is communicated with the inner part of the lower cavity through an air pipe.
6. The precast concrete member forming apparatus of claim 1, wherein a vacuum valve for vacuum release is provided on the upper engaging cavity.
7. The precast concrete member forming device according to claim 1, wherein a sealing ring is provided at a position where the feeding pipe contacts with the feeding pipe opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538517.1A CN111702937A (en) | 2020-06-13 | 2020-06-13 | Precast concrete member forming process and forming device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538517.1A CN111702937A (en) | 2020-06-13 | 2020-06-13 | Precast concrete member forming process and forming device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111702937A true CN111702937A (en) | 2020-09-25 |
Family
ID=72539938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010538517.1A Pending CN111702937A (en) | 2020-06-13 | 2020-06-13 | Precast concrete member forming process and forming device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111702937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910423A (en) * | 2021-07-26 | 2022-01-11 | 江苏凯晋锋装备科技有限公司 | Vacuumizing concrete elongated member mould with inner mould and outer mould and working method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201140495Y (en) * | 2007-12-19 | 2008-10-29 | 北京玻钢院复合材料有限公司 | Vacuum auxiliary molding mold for compression molding |
| JP2010012478A (en) * | 2008-07-01 | 2010-01-21 | Kobe Steel Ltd | Boosting method upon repressurization |
| CN204123502U (en) * | 2014-09-22 | 2015-01-28 | 东莞信柏结构陶瓷有限公司 | A kind of ceramic device for automatically molding |
| CN204844409U (en) * | 2015-08-24 | 2015-12-09 | 重庆环州新型建材有限公司 | Superstructure suppression takes shape quick -wittedly and forming die thereof |
| CN106514830A (en) * | 2016-11-09 | 2017-03-22 | 中建科技湖南有限公司 | Forming process and device of precast concrete member |
| CN207172380U (en) * | 2017-08-28 | 2018-04-03 | 成都太微电子科技有限公司 | Press-down type sheet material grouting equipment is inhaled in one kind |
| CN110893641A (en) * | 2019-12-12 | 2020-03-20 | 中科德冠(福建)科技有限公司 | Bidirectional static pressure block forming machine |
| CN111002439A (en) * | 2019-12-11 | 2020-04-14 | 叶文彬 | Stone-like brick forming machine |
-
2020
- 2020-06-13 CN CN202010538517.1A patent/CN111702937A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201140495Y (en) * | 2007-12-19 | 2008-10-29 | 北京玻钢院复合材料有限公司 | Vacuum auxiliary molding mold for compression molding |
| JP2010012478A (en) * | 2008-07-01 | 2010-01-21 | Kobe Steel Ltd | Boosting method upon repressurization |
| CN204123502U (en) * | 2014-09-22 | 2015-01-28 | 东莞信柏结构陶瓷有限公司 | A kind of ceramic device for automatically molding |
| CN204844409U (en) * | 2015-08-24 | 2015-12-09 | 重庆环州新型建材有限公司 | Superstructure suppression takes shape quick -wittedly and forming die thereof |
| CN106514830A (en) * | 2016-11-09 | 2017-03-22 | 中建科技湖南有限公司 | Forming process and device of precast concrete member |
| CN207172380U (en) * | 2017-08-28 | 2018-04-03 | 成都太微电子科技有限公司 | Press-down type sheet material grouting equipment is inhaled in one kind |
| CN111002439A (en) * | 2019-12-11 | 2020-04-14 | 叶文彬 | Stone-like brick forming machine |
| CN110893641A (en) * | 2019-12-12 | 2020-03-20 | 中科德冠(福建)科技有限公司 | Bidirectional static pressure block forming machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910423A (en) * | 2021-07-26 | 2022-01-11 | 江苏凯晋锋装备科技有限公司 | Vacuumizing concrete elongated member mould with inner mould and outer mould and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101987335B (en) | Wingtip cover mirror face part drawing processing method | |
| CN106825191A (en) | A kind of pipe fitting sealing moulding device and method based on internal high pressure forming die | |
| CN102794403B (en) | Lost foam mold for motor casing | |
| CN214773598U (en) | Composite hose injection molding die | |
| CN101995317A (en) | Reduction box body pressure test device and method thereof | |
| CN204101252U (en) | Valve body moulding blank pressure testing annex | |
| CN111702937A (en) | Precast concrete member forming process and forming device thereof | |
| US20070090554A1 (en) | Panel molding method and apparatus | |
| CN106270093A (en) | A kind of hollow blade intrinsic pressure manufacturing process of viscoelastroplasticity soft mode and forming device | |
| CN208854920U (en) | It suppresses in advance and introduces connector injecting molding die | |
| CN215467885U (en) | Wax pressing device for precision casting | |
| CN101823332B (en) | Method and device for regulating thickness of extrusion-blown moulding hollow work piece by utilizing local vacuum-pumping | |
| CN209755826U (en) | Exhaust device of mould | |
| TWM480464U (en) | Hot press molding machine with vacuum shield apparatus | |
| CN208759941U (en) | A kind of outer core pulling reverse stripping mechanism of mould of car lamp | |
| CN207271890U (en) | A kind of automotive suspension arm building mortion based on internal high pressure forming | |
| JP3931209B2 (en) | Press molding equipment | |
| CN206884150U (en) | A kind of mold closing mechanism of offshore platform oil production equipment | |
| CN210701945U (en) | Pneumatic forming die for thermal-state metal pipe parts | |
| JPS6453555A (en) | Resin molding apparatus for semiconductor device | |
| CN218111544U (en) | Medical equipment shell injection mold with controllable material flow velocity | |
| CN215150996U (en) | Novel plastic product mold convenient for stripping | |
| CN201735761U (en) | Vacuum die casting equipment for producing ring connecting piece of air-conditioner compressor | |
| CN212498719U (en) | Die set | |
| CN209191234U (en) | A kind of mold with sloping slide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 516000 Huangsha section, Yangna village, Danshui street, Huiyang District, Huizhou City, Guangdong Province Applicant after: Huizhou zhuyou Zhizao Technology Co.,Ltd. Address before: 516000 Huangsha section, Yangna village, Danshui street, Huiyang District, Huizhou City, Guangdong Province Applicant before: Huizhou Zhongmin Sumitomo Technology Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |
|
| RJ01 | Rejection of invention patent application after publication |