CN107756701A - A kind of flow-compensated control device - Google Patents
A kind of flow-compensated control device Download PDFInfo
- Publication number
- CN107756701A CN107756701A CN201610684981.5A CN201610684981A CN107756701A CN 107756701 A CN107756701 A CN 107756701A CN 201610684981 A CN201610684981 A CN 201610684981A CN 107756701 A CN107756701 A CN 107756701A
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- China
- Prior art keywords
- feed
- group
- measuring pump
- feeding materials
- pipeline
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 6
- 229920002521 macromolecule Polymers 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000004814 polyurethane Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 10
- 229920002635 polyurethane Polymers 0.000 description 10
- 239000002649 leather substitute Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 239000010985 leather Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010107 reaction injection moulding Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
Abstract
The present invention relates to the flow-compensated control device that a kind of two-component or more component macromolecule chemical industry raw materials use, including N group feed liquid feed systems (1), one mixing pouring head (2), every group of feed liquid feed system is made up of feeding materials valve (3), liquor charging pipeline (5), measuring pump (6), back liquid pipeline (9), feeding materials valve (3) is installed on mixing pouring head (2), measuring pump (6) is installed on liquor charging pipeline (5), it is characterised in that：The measuring pump (6) is driven by servomotor (7), the mass flowmenter (8) of high measuring accuracy is installed on the liquor charging pipeline being exported between feeding materials valve of measuring pump, and it is furnished with a set of PLC control system (10) with comparison function, every group of feed liquid feed system (1) inputs PLC control system (10) and this group of mass flowmenter (8) the data on flows signal contrast received by its feed raw material proportioning flow, send the signal that servomotor (7) driving rotating speed improves or reduction acts, ensure that every group of feed liquid feed flow is constant, so as to ensure that N groups component formula is constant.
Description
Technical field：The present invention relates to one kind that a kind of two-component or more component macromolecule chemical industry raw material casting equipments use
Flow-compensated control device, it is particularly applied to solvent-free PU synthetic leather Special coating equipment, polyurethanes foaming machine or elasticity
A kind of flow-compensated control device of body casting machine, epoxy resin chemical production equipment.
Background technology：It is well known that the raw material in the production technology of conventional synthesis leather (being commonly called as PU leather) are to use solvent
Type resin, i.e., a large amount of solvent dilutions are added into hundreds of thousands molecular weight the macromolecule polyurethane resin of chaining tens of thousands of,
Finished product is obtained after solvent is evaporated with wet method or dry process again after being coated onto in base fabric, can be produced in process of production serious
Solvent discharge pollution, it is most common be exactly DMF waste gas and waste water on synthetic leather factory periphery environment influence；And final
Synthesis leather goods in have certain dissolvent residual and can not eradicate.With the reinforcement of environmental consciousness, each side is on the one hand to molten
The synthetic leather products of agent residual are no longer swallowed, for example, European Union the residue examination criteria for exporting synthetic leather is added year by year it is tight,
Large-scale apparel brand and motion brand explicitly indicate that and want pure environmentally friendly synthesis to remove from office.The control standard of two pairs of plant gas discharge of wastewater
The operating environment that more and more higher, country contact occupational health hazards factor to employee requires also more and more tighter.From each side
Pressure all goes to draw close in the production of invisible promotion synthetic leather and product in the direction toward environmental protection.Start within 2009 to occur without molten
Agent polyurethane products, the extensive concern in market is received, but because the special equipment of no-solvent polyurethane is slowly not kept pace with,
No-solvent polyurethane material is caused not stably produce, so that laboratory stage is rested on always.Enterprise where the author is
The specialized factory of production polyurethane production equipment is engaged in for many years, is national reaction injection molding equipment technology branch center, is undertaken nothing
The research and development task of solvent synthetic leather Special coating equipment.Uninanned platform leather is identical with current polyurethane material mechanism, is
A feed liquids are spurted into mixing arrangement by a certain percentage with B feed liquids or more component raw materials to be quickly stirred, then by pouring into a mould
Mouth outpours the feed liquid for producing chemosynthesis reaction, and polyurethanes foaming machine or elastomer casting machine are needed for injection mould is formed
Product；Uninanned platform leather equipment requirement continuous uniform is coated in synthesis base fabric, and difference is polyurethanes foaming machine or bullet
Property the work of body casting machine be all intermittent operation mode, i.e., based on injection molding processing, and solvent-free PU synthetic leather Special coating equipment
It is continuity mode of operation, mixed proportion is different, and density, the performance of manufactured goods are then different.Injection molding processing focus is once
Pour into a mould each component constant rate, metering precisely (see Fig. 1), when system is in casting condition, material is from measuring pump through flow regulator pieces
11 produce pressure P (pump discharge pressure table 12 is shown), when system is in reflux state, thing to mixing pouring head (2) hybrid chamber
Material, by the generation system return pressure P1 of pressure regulation bar 14, when P1 is more than P, is adjusted pressure regulation bar 14, put backward by refluxing opening 15
Big backflow latus rectum, control running gate system feed back state pressure and casting condition pressure and discontinuous operation self-consistentency, balance, so as to
Ensure the measuring pump unit interval load of constant speed drive precisely, stably.But synthesized for the solvent-free PU of a quantity-produced
To remove from office for Special coating equipment, it is ensured that the ratio that product quality must run whole guarantee each component in equipment is precisely constant,
Additionally, due to the demand for having test manufacture, examining product etc., it will never be one within the specific limits that the equipment speed of service, which must be,
Individual constant speed, if this to ensure product quality must ensure under the different speeds of service each component ratio precisely it is constant,
Still by the way of pressure in control running gate system, it can be realized under constant speed, require that flow shows variable condition in the case of speed change,
Now pressure can not follow change to adjust, and also can not just ensure that each component flow proportional is constant.
The content of the invention：The purpose of the present invention is to overcome the insurmountable technological difficulties of prior art, there is provided a kind of flow is mended
Repay control device.The author enterprise is groped by practice, according to solvent-free PU synthetic leather Special coating equipment operation characteristic, the company of catching
Reforwarding row production equipment needs the principal element controlled i.e.：From control system pressure steering control system flow.As long as ensure each
Component feed liquid feed system feed flow in proportion all the time, just can the up-to-standard product of continuous production, solve solvent-free life
The problem of production of PU synthetic leather is without special equipment is produced, is laid a solid foundation for popularization and application are solvent-free.
This practicality invention is this flow-compensated control dress by being improved design on the basis of existing polyurethane plant
Put, including N group feed liquid feeds system 1, a mixing pouring head 2 for carrying hybrid chamber 2-1, every group of feed liquid feed system is by batch can
4th, feeding materials valve 3, liquor charging pipeline 5, measuring pump 6, back liquid pipeline 9 form, between batch can 4 and feeding materials valve 3 by liquor charging pipeline 5 and return
Liquid pipe road 9 is connected, and feeding materials valve 3 is installed on mixing pouring head 2, the hybrid chamber of the sprue 3-1 of feeding materials valve with mixing pouring head
2-1 is communicated, and liquid return hole 3-2 connects back liquid pipeline 9 and leads to feed back tank 4, and measuring pump 6 is installed on liquor charging pipeline 5, it is characterised in that：Institute
State measuring pump 6 to be driven by servomotor 7, high metering essence is installed on the liquor charging pipeline 5 being exported between feeding materials valve of measuring pump
The mass flowmenter 8 of degree, and it is furnished with a set of PLC control system 10 with comparison function, PLC control system quality of reception flow
8 signals are counted, send the drive actions signal of servomotor 7.
A kind of flow-compensated control device of the present invention, using the PLC control system 10 with comparison, computing function
It is controlled, each group feed liquid feed system is connected into quality stream in each group feed liquid feed system with liquid proportional input PLC first
The signal receiving circuit of gauge 8 and corresponding servomotor driving instruction circuit, and require the memory of PLC control system 10 by actual measurement and
It is calculated each group servomotor driving measuring pump rotating speed and PU leather production line speed corresponding relation, in actual production process, by
In group feed liquid feed system immanent cause or external factor influence that pressure change occurs, produce metering and forbidden, PLC control system connects
The fluctuation of mass flowmenter measured discharge is received, contrast conting, which is sent, adjusts servomotor tach signal, the fluctuating error of compensating flowrate,
Monitoring each component flow proportional compares with given ratio value in real time simultaneously, servomotor rotating speed is finely tuned, so as to ensure each component thing
The delivery precision of material, produces qualified products.
Brief description of the drawings：
Accompanying drawing 1 is existing polyurethane plant feed liquid feed system structure diagram；
Accompanying drawing 2 is structural representation of the embodiment of the present invention；
Below in conjunction with accompanying drawing, the invention will be further described, and provides embodiment.
A kind of flow-compensated control device embodiment of the present invention as shown in Fig. 2 device includes N group feed liquid feeds system 1,
One mixing pouring head 2 for carrying hybrid chamber 2-1, every group of feed liquid feed system is by batch can 4, feeding materials valve 3, liquor charging pipeline 5, metering
Pump 6, back liquid pipeline 9 are formed, and are connected between batch can 4 and feeding materials valve 3 by liquor charging pipeline 5 and back liquid pipeline 9, and feeding materials valve 3 is installed
In on mixing pouring head 2, the sprue 3-1 of feeding materials valve communicates with mixing the hybrid chamber 2-1 of pouring head, and liquid return hole 3-2 takes back liquid
Pipeline 9 leads to feed back tank 4, and measuring pump 6 is installed on liquor charging pipeline 5, it is characterised in that：The measuring pump 6 is driven by servomotor 7
It is dynamic, the mass flowmenter 8 of high measuring accuracy is installed on the liquor charging pipeline 5 being exported between feeding materials valve of measuring pump, and be furnished with
A set of PLC control system 10 with comparison function, every group of feed liquid feed system 1 is by its feed raw material proportioning flow input PLC
Control system 10 and the data on flows signal contrast of this group of mass flowmenter 8 received, send servomotor 7 and drive rotating speed to improve
Or the signal of reduction action, it is ensured that every group of feed liquid feed flow is constant, so as to ensure that N groups component formula is constant.
Claims (1)
1. a kind of flow-compensated control device, including N group feed liquid feed systems (1), a mixing with hybrid chamber (2-1) is poured
Head (2), every group of feed liquid feed system is by batch can (4), feeding materials valve (3), liquor charging pipeline (5), measuring pump (6), back liquid pipeline (9)
Composition, is connected, feeding materials valve (3) is installed on mixed between batch can (4) and feeding materials valve (3) by liquor charging pipeline (5) and back liquid pipeline (9)
Close on pouring head (2), the sprue (3-1) of feeding materials valve communicates with mixing the hybrid chamber (2-1) of pouring head, and liquid return hole (3-2) connects
Back liquid pipeline (9) leads to feed back tank (4), and measuring pump (6) is installed on liquor charging pipeline (5), it is characterised in that：The measuring pump (6)
Driven by servomotor (7), the matter of high measuring accuracy is installed on the liquor charging pipeline (5) being exported between feeding materials valve of measuring pump
Flowmeter (8) is measured, and is furnished with a set of PLC control system (10) with comparison function, PLC control system quality of reception flowmeter
(8) signal, servomotor (7) drive actions signal is sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684981.5A CN107756701A (en) | 2016-08-17 | 2016-08-17 | A kind of flow-compensated control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684981.5A CN107756701A (en) | 2016-08-17 | 2016-08-17 | A kind of flow-compensated control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107756701A true CN107756701A (en) | 2018-03-06 |
Family
ID=61262774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610684981.5A Pending CN107756701A (en) | 2016-08-17 | 2016-08-17 | A kind of flow-compensated control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107756701A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844237A (en) * | 2020-12-28 | 2021-05-28 | 山东滨农科技有限公司 | Feeding control method for dehydration reaction in preparation of agricultural herbicide technical |
| CN113733443A (en) * | 2021-08-10 | 2021-12-03 | 浙江大学舟山海洋研究中心 | Desktop type foaming machine |
| CN114272796A (en) * | 2021-11-24 | 2022-04-05 | 太仓北新建材有限公司 | Foaming system of multi-type foaming agent and compounding control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202716391U (en) * | 2012-08-20 | 2013-02-06 | 湘潭方棱聚氨酯机器有限公司 | Bi-component continuous automatic glue mixing machine |
-
2016
- 2016-08-17 CN CN201610684981.5A patent/CN107756701A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202716391U (en) * | 2012-08-20 | 2013-02-06 | 湘潭方棱聚氨酯机器有限公司 | Bi-component continuous automatic glue mixing machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844237A (en) * | 2020-12-28 | 2021-05-28 | 山东滨农科技有限公司 | Feeding control method for dehydration reaction in preparation of agricultural herbicide technical |
| CN113733443A (en) * | 2021-08-10 | 2021-12-03 | 浙江大学舟山海洋研究中心 | Desktop type foaming machine |
| CN114272796A (en) * | 2021-11-24 | 2022-04-05 | 太仓北新建材有限公司 | Foaming system of multi-type foaming agent and compounding control method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180306 |