CN110303628A - A kind of EPP plate surface skinning technique - Google Patents
A kind of EPP plate surface skinning technique Download PDFInfo
- Publication number
- CN110303628A CN110303628A CN201910616986.8A CN201910616986A CN110303628A CN 110303628 A CN110303628 A CN 110303628A CN 201910616986 A CN201910616986 A CN 201910616986A CN 110303628 A CN110303628 A CN 110303628A
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- CN
- China
- Prior art keywords
- epp
- temperature
- mold
- plate surface
- precompressed
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- 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
- B29C43/52—Heating or cooling
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of EPP plate surface skinning technique, the EPP plate surface skinning technique chooses suitable EPP raw material and is put into the pre- compression swelling of precompressed tank progress the following steps are included: step 1；EPP particle after pre- compression swelling is entered in the mold cavity preheated and is molded by die feeding mouth by step 2；Step 3, pressure maintaining, while cavity plate to mold and punch-pin be rapidly heated heating then fast cooling after 15 ~ 30s of heat preservation, are repeated 2 ~ 3 times；Step 4, last time demould after mold temperature is reduced to 40 ~ 60 DEG C after heating；Preheating temperature is 80 ~ 120 DEG C in the step 2, and the temperature end point being rapidly heated in the step 3 is 250 DEG C ~ 300 DEG C, and the cooling terminal of the fast cooling is 20 ~ 60 DEG C, and the temperature raising medium is conduction oil, and the temperature-reducing medium is ice water.By the above-mentioned means, the present invention, which can obtain the regular EPP plate of smooth surface, can satisfy the requirement for needing to fit closely packaging.
Description
Technical field
The present invention relates to packaging material fields, more particularly to a kind of EPP plate surface skinning technique.
Background technique
Polypropylene plastics foamed material is a kind of highly crystalline type polymer/gas recombination material of performance brilliance, solely with it
Special and superior performance becomes fastest-rising environment-friendly novel resistance to compression at present and buffers heat-barrier material.EPP product has very excellent
Antidetonation energy absorption performance, response rate is high after deformation, good heat resistance, chemicals-resistant, oil resistivity and thermal insulation, EPP plate are made
It is used as IT product, electronics, liquid crystal display, Plasma Color TV, accurate electricity extensively for one of EPP preformed material
The packaging material of sub- component, precision instrumentation etc., but existing EPP plate surface is only regular smooth, for some
The sophisticated product for needing to be bonded packaging needs to handle by surface rubbing, or as construction material interlayer when be also required to carry out
Special smoothing processing.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of EPP plate surface skinning techniques, are able to produce out surface
Smooth EPP plate.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of EPP plate surface skinning is provided
Technique, the EPP plate surface skinning technique the following steps are included:
Step 1 chooses suitable EPP raw material and is put into the pre- compression swelling of precompressed tank progress；
Step 2 enters the EPP particle after pre- compression swelling in the mold cavity preheated simultaneously by die feeding mouth
Molding；
Step 3, pressure maintaining, while cavity plate to mold and punch-pin be rapidly heated heating then fast prompt drop after 15 ~ 30s of heat preservation
Temperature is repeated 2 ~ 3 times；
Step 4, last time demould after mold temperature is reduced to 40 ~ 60 DEG C after heating；
Preheating temperature is 80 ~ 120 DEG C in the step 2, and the temperature end point being rapidly heated in the step 3 is 250 DEG C ~ 300
DEG C, the cooling terminal of the fast cooling is 20 ~ 60 DEG C, and the temperature raising medium is conduction oil, and the temperature-reducing medium is ice water.
In a preferred embodiment of the present invention, the precompressed in the step 1 is expanded to secondary precompressed plavini, described
Secondary precompressed plavini content includes extracting particle out after heating for the first time precompressed 8 hours to cool down, and then again relays particle
Enter secondary precompressed in precompressed tank.
In a preferred embodiment of the present invention, the mold is using preceding needing the forming surface to cavity plate and punch-pin to do mirror surface
Processing.
In a preferred embodiment of the present invention, the mold cavity has 2 ~ 4 feed inlets.
In a preferred embodiment of the present invention, the feeding manner of the EPP particle is high pressure draught sprayed feed method.
In a preferred embodiment of the present invention, it is first loosened the mold with pressure-air before EPP plate demoulding.
The beneficial effects of the present invention are: the technical scheme is that producing the EPP plate of surfacing by technology controlling and process
Material is made to obtain regular EPP plate with meeting the needs of fitting closely packaging under some particular surroundings and improving EPP plate
For the property easy to use of sandwich boards for construction material.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
The embodiment of the present invention includes:
A kind of EPP plate surface skinning technique, the EPP plate surface skinning technique the following steps are included:
Step 1 chooses suitable EPP raw material and is put into the pre- compression swelling of precompressed tank progress；
Step 2 enters the EPP particle after pre- compression swelling in the mold cavity preheated simultaneously by die feeding mouth
Molding；
Step 3, pressure maintaining, while cavity plate to mold and punch-pin be rapidly heated heating then fast prompt drop after 15 ~ 30s of heat preservation
Temperature is repeated 2 ~ 3 times；
Step 4, last time demould after mold temperature is reduced to 40 ~ 60 DEG C after heating；
Preheating temperature is 80 ~ 120 DEG C in the step 2, and the temperature end point being rapidly heated in the step 3 is 250 DEG C ~ 300
DEG C, the cooling terminal of the fast cooling is 20 ~ 60 DEG C, and the temperature raising medium is conduction oil, and the temperature-reducing medium is ice water.On
Stating the purpose for heating and cooling down repeatedly in step 3 in step is to make its melting, then by quick high-temp heated material surface
Its condensation is promoted by fast cooling again, heating pressurization, condenses into EPP raw particles in the forming surface of mold repeatedly
Smooth plate face.
Precompressed in the step 1 is expanded to secondary precompressed plavini, and the secondary precompressed plavini content includes first
Particle is extracted out after secondary heating precompressed 8 hours and is cooled down, particle is then reentered into secondary precompressed in precompressed tank again.Pass through this side
The expansion rate of particle can be improved in formula, further decreases particle density, obtains the higher material of heat-proof quality
The mold is using preceding needing the forming surface to cavity plate and punch-pin to do mirror surface treatment, when on the one hand making EPP plate surface skinning
Flat and smooth, on the other hand, can prevent surface skining is adhered in forming surface, is easy to demould.
The mold cavity has 3 feed inlets, and 2 are located at the side wall of type chamber on top position into cast gate,
Symmetrical, a glue-feeder is arranged in type top of chamber, can keep balance in charging in this way, and reduction type is intracavitary out
The phenomenon of existing feed distribution unevenness.
The feeding manner of the EPP particle is high pressure draught sprayed feed method, stirs particle by high pressure draught, prevents out
Existing particle local accumulation causes particle integrally uneven.
It is first loosened the mold with pressure-air before the EPP plate demoulding, can prevent mold sticking occur when demoulding.
In another embodiment,
A kind of EPP plate surface skinning technique, the EPP plate surface skinning technique the following steps are included:
Step 1 chooses suitable EPP raw material and is put into the pre- compression swelling of precompressed tank progress；
Step 2 enters the EPP particle after pre- compression swelling in the mold cavity preheated simultaneously by die feeding mouth
Molding；
Step 3, pressure maintaining, while cavity plate to mold and punch-pin be rapidly heated heating then fast prompt drop after 15 ~ 30s of heat preservation
Temperature is repeated 2 ~ 3 times；
Step 4, last time demould after mold temperature is reduced to 40 ~ 60 DEG C after heating；
Preheating temperature is 80 ~ 120 DEG C in the step 2, and the temperature end point being rapidly heated in the step 3 is 250 DEG C ~ 300
DEG C, the cooling terminal of the fast cooling is 20 ~ 60 DEG C, and the temperature raising medium is conduction oil, and the temperature-reducing medium is ice water.On
Stating the purpose for heating and cooling down repeatedly in step 3 in step is to make its melting, then by quick high-temp heated material surface
Its condensation is promoted by fast cooling again, heating pressurization, condenses into EPP raw particles in the forming surface of mold repeatedly
Smooth plate face.
Precompressed in the step 1 is expanded to secondary precompressed plavini, and the secondary precompressed plavini content includes first
Particle is extracted out after secondary heating precompressed 8 hours and is cooled down, particle is then reentered into secondary precompressed in precompressed tank again.Pass through this side
The expansion rate of particle can be improved in formula, further decreases particle density, obtains the higher material of heat-proof quality
The mold is using preceding needing the forming surface to cavity plate and punch-pin to do mirror surface treatment, when on the one hand making EPP plate surface skinning
Flat and smooth, on the other hand, can prevent surface skining is adhered in forming surface, is easy to demould.
The mold cavity has 4 feed inlets, and 2 are located at the side wall of type chamber on top position into cast gate,
Symmetrical, the setting of 2 glue-feeders is symmetrical in type top of chamber two sides, can keep balance in charging in this way,
The intracavitary phenomenon for feed distribution unevenness occur of reduction type.
The feeding manner of the EPP particle is high pressure draught sprayed feed method, stirs particle by high pressure draught, prevents out
Existing particle local accumulation causes particle integrally uneven.
It is first loosened the mold with pressure-air before the EPP plate demoulding, can prevent mold sticking occur when demoulding.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (6)
1. a kind of EPP plate surface skinning technique, which is characterized in that the EPP plate surface skinning technique the following steps are included:
Step 1 chooses suitable EPP raw material and is put into the pre- compression swelling of precompressed tank progress；
Step 2 enters the EPP particle after pre- compression swelling in the mold cavity preheated simultaneously by die feeding mouth
Molding；
Step 3, pressure maintaining, while cavity plate to mold and punch-pin be rapidly heated heating then fast prompt drop after 15 ~ 30s of heat preservation
Temperature is repeated 2 ~ 3 times；
Step 4, last time demould after mold temperature is reduced to 40 ~ 60 DEG C after heating；
Preheating temperature is 80 ~ 120 DEG C in the step 2, and the temperature end point being rapidly heated in the step 3 is 250 DEG C ~ 300
DEG C, the cooling terminal of the fast cooling is 20 ~ 60 DEG C, and the temperature raising medium is conduction oil, and the temperature-reducing medium is ice water.
2. EPP plate surface skinning technique according to claim 1, which is characterized in that the precompressed in the step 1 is swollen
Swollen is secondary precompressed plavini, and the secondary precompressed plavini content includes that heating for the first time extracts particle out after precompressed 8 hours
It is cooling, particle is then reentered into secondary precompressed in precompressed tank again.
3. EPP plate surface skinning technique according to claim 1, which is characterized in that the mold is using preceding needing pair
The forming surface of cavity plate and punch-pin does mirror surface treatment.
4. EPP plate surface skinning technique according to claim 1, which is characterized in that the mold cavity has 2 ~ 4
Feed inlet.
5. EPP plate surface skinning technique according to claim 1, which is characterized in that the feeding manner of the EPP particle
For high pressure draught sprayed feed method.
6. EPP plate surface skinning technique according to claim 1, which is characterized in that before the EPP plate demoulding first
It is loosened the mold with pressure-air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616986.8A CN110303628A (en) | 2019-07-09 | 2019-07-09 | A kind of EPP plate surface skinning technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616986.8A CN110303628A (en) | 2019-07-09 | 2019-07-09 | A kind of EPP plate surface skinning technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110303628A true CN110303628A (en) | 2019-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910616986.8A Pending CN110303628A (en) | 2019-07-09 | 2019-07-09 | A kind of EPP plate surface skinning technique |
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| Country | Link |
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| CN (1) | CN110303628A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340530A (en) * | 2017-12-29 | 2018-07-31 | 昆山巴鸣泡沫塑料制品有限公司 | A kind of incubator surface skining technique |
-
2019
- 2019-07-09 CN CN201910616986.8A patent/CN110303628A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340530A (en) * | 2017-12-29 | 2018-07-31 | 昆山巴鸣泡沫塑料制品有限公司 | A kind of incubator surface skining technique |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20191008 |