CN109228089A - A kind of pmma material forming method - Google Patents
A kind of pmma material forming method Download PDFInfo
- Publication number
- CN109228089A CN109228089A CN201810862546.6A CN201810862546A CN109228089A CN 109228089 A CN109228089 A CN 109228089A CN 201810862546 A CN201810862546 A CN 201810862546A CN 109228089 A CN109228089 A CN 109228089A
- Authority
- CN
- China
- Prior art keywords
- material forming
- forming method
- pmma material
- pmma
- molding
- 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
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5816—Measuring, controlling or regulating temperature
Abstract
The invention discloses a kind of pmma material forming methods, its lucite powder for completing pre-polymerization and organic hyaline monomer are mixed according to the ratio between 3:7 to 7:3, it injects the mixture into mold, then unitary mould is placed in pressure vessel and is formed by temperature-pressure.Pmma material forming method of the present invention solves the problems, such as that special thickness PMMA (50mm or more) material molding time is long, high rejection rate, unstable product quality, this method is more controllable, more efficient compared to traditional molding methods are compared, and moulding is very rich, institute's converted products has higher molecular weight and higher intensity.And also has the advantages that the resistance to yellow change ﹑ intensity of high thoroughly bright ﹑ is high using the molding product of the method for the present invention, thus be with a wide range of applications.
Description
Technical field
The present invention relates to organic glass moulding process fields, and in particular to a kind of molding for special thick pmma material
Method.
Background technique
Organic glass, is called acrylic or PMMA, and chemical name is polymethyl methacrylate.It is a kind of develop earlier
Important plastic macromolecule material has the preferable transparency, chemical stability and weatherability, easy dyeing, easy processing, appearance excellent
Beauty, the extensive application in the fields such as construction industry.
The domestic acrylic PMMA of production at present dispensing modeling is squeezed out to be produced with pouring technology.Being molded extrusion molding can only comparision of production
Thin plate or smallclothes abnormity object, the special heavy plate material (50mm or more) that casting mainly produces, using pre-polymerization immersion method,
But it is long that there are molding times, and scrappage is high, and since operation is random strong, unstable product quality is molding with the method
The disadvantages of material also has molecular weight low, and intensity is not high.And market in urgent need now forms richer (almost any shape), thickness
Du Genggao, operating time be shorter, the higher acrylic forming technique of intensity.
Summary of the invention
The purpose of the invention is to provide a kind of pmma material forming method, it is intended to solve thick organic glass special at present
Molding moulding single (mainly plate and round tube, pole etc.) present in glass moulding process, the time is long, scrappage is high, product
The problem of unstable quality.
For this purpose, the technical scheme adopted by the invention is as follows:
A kind of pmma material forming method, wherein press lucite powder and organic hyaline monomer that pre-polymerization is completed
According to the ratio mixing between 3:7 to 7:3, injects the mixture into mold, then unitary mould is placed in pressure vessel and is led to
Cross temperature-pressure molding.
The pmma material forming method, wherein the mixed proportion of lucite powder and organic hyaline monomer is
Between 3:7 to 7:3.
The pmma material forming method, wherein temperature control is at 50-100 degrees Celsius in pressure vessel.
The pmma material forming method, wherein pressure control is in 0.5-1.3MP in pressure vessel.
The pmma material forming method, wherein molding time is 8-72 hours.
The pmma material forming method, wherein pressure vessel is using injection heating medium in collet come indirectly
Heating.
The pmma material forming method, wherein the mold cavity is designed based on final molding shape of product.
The pmma material forming method, wherein shaped article thickness 50mm or more.
The utility model has the advantages that the present invention provides a kind of pmma material forming method, this method solve spy thickness PMMA (50mm
More than) material molding time long, moulding Dan mono- ﹑ high rejection rate, unstable product quality the problem of, this method compared to compare pass
Forming method of uniting is more controllable, more efficient, and institute's converted products has higher molecular weight and higher intensity, and utilizes this hair
The bright molding product of method also has the advantages that the resistance to yellow ﹑ intensity that becomes of high thoroughly bright ﹑ is high, thus has extensive market application prospect.
Specific embodiment
Below by the embodiment technical solution that the present invention is further explained, but the scope of protection of present invention not office
It is limited to the range of embodiment expression.
The present invention abandons the traditional water bath method of forming of special thick acrylic, realizes the secondary of organic glass using temperature-pressure method
Polymerization, i.e., by pre-polymerization complete PMMA powder and MMA monomer according between 3:7 to 7:3 ratio mix, first time pre-polymerization be exactly
The good PMMA powder of pre-polymerization and MMA monomer are mixed directly in any one container under natural room temperature, then stirred, foundation needs to use
Workpiece size amount, can manually or blender stirring, until stirring into starchiness, inject the mixture into mold, so
Unitary mould is placed in pressure vessel afterwards, is formed using the method that accurate temperature and pressure combines, temperature is controlled in 50-
100 degrees Celsius, pressure control uses micro computer control, standardizes automatic moulding in 0.5-1.3MP, temperature control.The present invention at
Type method can be used for forming the organic glass product of any thickness, be particularly suitable for shaped article thickness 50mm or more, tradition
Spy thickness PMMA molding is to form MMA monomer using immersion method, and main difficulty is the control of temperature, the low then shaping speed of temperature
Very slow, elder is even up to some months, and temperature is slightly higher to be then very easy to implode, can cause safety problem and wave if implode
Costly resource, temperature is low, and molding time is very long or even cannot form.
And it is shortened to 8-72 hours using the method for the present invention preparation preparation special thickness PMMA product moulding time, and formed product
Reliable and stable, almost zero failure rate.Such as the PMMA plate of 800mm thickness, conventional method need 20-90 days, it is of the invention at
The type time only needs 1 day.The present invention uses after polymerization shaped article, thus to polymerize more traditional method more complete for product,
Molecular weight is higher, and intensity is higher, and intensity is improved compared with conventional method, and weatherability is also more preferable.
Pressure vessel is to heat (indirect electric-heating-wire-heating) indirectly using injection heating medium in collet, to guarantee to hold
Temperature in device is uniform, while plus-pressure.After mold is placed in pressure vessel, hatch door is shut, starts to pressurize, according to
It is pressurized to according to workpiece size until 0.5-1.3MP, stops pressurization, start to warm up, until 50-100 degrees Celsius (according to workpiece size
Determine temperature, workpiece is bigger, and temperature is lower), stop heating, keeps pressure.Mixture starts to send out under the initiation of temperature at this time
Raw to react and slowly start curing molding, according to workpiece size, the reaction time is different, by reaction in -72 hours 8 hours, mixes
Object curing molding is closed, and as clear as crystal.Start pressure release after reaction, until pressure is zero, open the cabin door, takes out mold, dismantles
Mold takes out workpiece, and finished product can be obtained by post-processing (such as the processes such as cutting, polishing, polishing).
Further, the mold cavity is designed based on final molding shape of product.Because required mold and temperature,
Pressure has direct incidence relation, so forming method of the present invention makes organic glass molding richer, conventional method is limited to
Plate or smallclothes simple geometry figure modelling can not accomplish moulding abnormity processing very rich, and forming method of the present invention can benefit
Accomplish that arbitrary shape forms with mold, to expand the application range of forming method.
The product produced using forming method of the present invention polymerize more traditional method due to belonging to after polymerization
Completely, compare that traditional molding methods are more controllable, more efficient, cost is controllable, molecular weight is higher, so intensity is higher.Due to
The product that the present invention produces has molding difficulty small, and the Gao Tou Ming ﹑ Bian of Nai Huang ﹑ intensity high (being 10 times of strength of glass) etc. is excellent
Point, is with a wide range of applications, and can be applied to the building decoration engineering instead of traditional glass, can also be applied to aircraft cockpit glass
Glass, the bulletproof glass of aircraft and automobile, optical glass, the underwater porthole of high voltage, the customization of large scale special-shaped Transparent Parts etc..
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (8)
1. a kind of pmma material forming method, which is characterized in that the lucite powder and organic glass list for completing pre-polymerization
Body is mixed according to the ratio between 3:7 to 7:3, is injected the mixture into mold, and then unitary mould is placed in pressure vessel
And it is formed by temperature-pressure.
2. pmma material forming method according to claim 1, which is characterized in that lucite powder and organic glass
The mixed proportion of monomer is between 3:7 to 7:3.
3. pmma material forming method according to claim 1, which is characterized in that temperature control exists in pressure vessel
50-100 degrees Celsius.
4. pmma material forming method according to claim 1, which is characterized in that pressure control exists in pressure vessel
0.5-1.3MP。
5. pmma material forming method according to claim 1, which is characterized in that molding time is 8-72 hours.
6. pmma material forming method according to claim 1, which is characterized in that pressure vessel uses to be infused in collet
Enter heat medium to heat indirectly.
7. pmma material forming method according to claim 1, which is characterized in that the mold cavity is based on final
The design of shaped article shape.
8. pmma material forming method according to claim 1, which is characterized in that shaped article thickness 50mm with
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862546.6A CN109228089A (en) | 2018-08-01 | 2018-08-01 | A kind of pmma material forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862546.6A CN109228089A (en) | 2018-08-01 | 2018-08-01 | A kind of pmma material forming method |
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| Publication Number | Publication Date |
|---|---|
| CN109228089A true CN109228089A (en) | 2019-01-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810862546.6A Pending CN109228089A (en) | 2018-08-01 | 2018-08-01 | A kind of pmma material forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109228089A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114851761A (en) * | 2022-06-02 | 2022-08-05 | 四川南谷文化传播有限公司 | Method for preparing crystal image by using polymethyl methacrylate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570413A (en) * | 2008-12-30 | 2009-11-04 | 上海新天和树脂有限公司 | Acrylic artificial stone and method for preparing same |
| CN107266840A (en) * | 2017-06-26 | 2017-10-20 | 雄九（杭州）资本管理有限公司 | The preparation method of antiflaming heat insulation acrylic plate |
| CN107936432A (en) * | 2017-11-02 | 2018-04-20 | 安徽金亮新型材料有限公司 | A kind of high-strength ageing acrylic material |
-
2018
- 2018-08-01 CN CN201810862546.6A patent/CN109228089A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570413A (en) * | 2008-12-30 | 2009-11-04 | 上海新天和树脂有限公司 | Acrylic artificial stone and method for preparing same |
| CN107266840A (en) * | 2017-06-26 | 2017-10-20 | 雄九（杭州）资本管理有限公司 | The preparation method of antiflaming heat insulation acrylic plate |
| CN107936432A (en) * | 2017-11-02 | 2018-04-20 | 安徽金亮新型材料有限公司 | A kind of high-strength ageing acrylic material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114851761A (en) * | 2022-06-02 | 2022-08-05 | 四川南谷文化传播有限公司 | Method for preparing crystal image by using polymethyl methacrylate |
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