CN101791856B - Production process and device of polylactic acid PLA thermoformed product - Google Patents
Production process and device of polylactic acid PLA thermoformed product Download PDFInfo
- Publication number
- CN101791856B CN101791856B CN2010101108335A CN201010110833A CN101791856B CN 101791856 B CN101791856 B CN 101791856B CN 2010101108335 A CN2010101108335 A CN 2010101108335A CN 201010110833 A CN201010110833 A CN 201010110833A CN 101791856 B CN101791856 B CN 101791856B
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- CN
- China
- Prior art keywords
- polylactic acid
- preheating block
- acid pla
- heating furnace
- sheet
- 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.)
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- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 91
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 91
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000003856 thermoforming Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 27
- 238000005516 engineering process Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000015173 baked goods and baking mixes Nutrition 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production process and a device of a polylactic acid PLA thermoformed product, the device comprises a preheating block, a heating furnace and a mold, wherein a sheet feeding chain is arranged in the heating furnace, the preheating block which is matched with the sheet feeding chain is arranged at the front end of a feed inlet of the heating furnace, and the preheating block is connected with a cylinder for moving the preheating block. The production process comprises the following steps: 1) firstly placing the preheating block on a polylactic acid PLA sheet for preheating, wherein the temperature of the preheating block is 50 DEG C-80 DEG C;2)feeding the PLA sheet after preheating to the heating furnace for heating through the sheet feeding chain, wherein the furnace temperature is 170 DEG C-270 DEG C; 3)feeding the PLA sheet after heating into the mold for thermoforming; 4)obtaining the required polylactic acid PLA thermoformed product. The production process and the device have the benefits that chain teeth of the sheet feeding chain in the heating furnace can not break when being embedded in the polylactic acid PLA sheet by increasing the preheating block, thereby realizing the smooth sheet feeding process; and the polylactic acid PLA thermoformed product can be processed according to the needs by setting the temperature of the preheating block and the temperature of the heating furnace.
Description
Technical field
The present invention relates to production technology and equipment, more specifically say, it relates to a kind of polylactic acid PLA thermoformed product production technology and equipment.
Background technology
Polylactic acid PLA is a kind of novel biodegradation material, and the starch material that uses reproducible plant resources (like corn) to be proposed is processed.Starch material is processed lactic acid via sweat, converts PLA to through chemical synthesis again.It has good biodegradability, can be degraded fully by the occurring in nature microorganism after the use, finally generates carbon dioxide and water, and is free from environmental pollution, and this is highly beneficial to the protection environment, is the environment-friendly material of generally acknowledging.The processing method of common plastics still is to burn to cremate; Cause a large amount of greenhouse gases to enter in the air, the PLA plastics then are to be buried in the soil to degrade, and the carbon dioxide of generation directly gets into the soil organism or by plant absorbing; Can not enter in the air, can not cause greenhouse effects.
Polylactic acid PLA sheet material can be made into the rigid package of primary product, fruit, egg, prepared food and baked goods through thermoforming; Disposable snack box, plate, plate, disposal plastic cup etc.But polylactic acid PLA thermoformed technology does not also have good specific aim solution at present, as uses universal thermoforming process and equipment, can cause carrying out the thermoforming of PLA sheet material.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide a kind of with strong points, yield rate is high, polylactic acid PLA thermoformed product production technology and equipment that product index is good.
The objective of the invention is to realize through following technical scheme.This polylactic acid PLA thermoformed product production equipment; Comprise workpiece preheating block, heating furnace, mould; Said inside heating furnace is provided with send the sheet chain, is provided with and the workpiece preheating block that send the sheet chain to match at the charging aperture front end of heating furnace, and workpiece preheating block is connected with the cylinder that is used for moving workpiece preheating block.
As preferably: said workpiece preheating block is positioned at the extended line top that heating furnace import department send the sheet chain.
As preferably: said workpiece preheating block is two, and is symmetrical set.
As preferably: said workpiece preheating block length is consistent with die length, and width is 3cm-5cm, and thickness is 2cm-5cm.
As preferably: said workpiece preheating block coats heat-conducting block by heating rod and forms.
As preferably: said heating furnace is provided with upper heater and following heater.
This polylactic acid PLA thermoformed product production technology, step is following:
The first step at first is placed on preheating on the polylactic acid PLA sheet material with workpiece preheating block, and the workpiece preheating block temperature is 50 ℃-80 ℃.
In second step, send into heating furnace heating, 170 ℃-270 ℃ of furnace temperature by the polylactic acid PLA sheet material after sending the sheet chain with preheating.
In the 3rd step, the polylactic acid PLA sheet material after the heating is by sending the sheet chain to send into the mold hot moulding
In the 4th step, obtain required polylactic acid PLA thermoformed product.
The invention has the beneficial effects as follows: through setting up workpiece preheating block, the sprocket that send the sheet chain in the heating furnace can not cause it cracked when embedding polylactic acid PLA sheet material, the smooth sheet process of sending.Workpiece preheating block temperature and furnace temp through setting can process polylactic acid PLA thermoformed product as required.
Description of drawings
Fig. 1 is a polylactic acid PLA thermoformed product production equipment structural representation;
Fig. 2 is a workpiece preheating block part-structure sketch map;
Fig. 3 is the workpiece preheating block structural representation.
Description of reference numerals: polylactic acid PLA sheet material 1; Workpiece preheating block 2; Heating furnace 3; Mould 4; Moulded products 5; Send sheet chain 6; Cylinder 7; Heating rod 8; Heat-conducting block 9.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done and to further describe.Though the present invention will combine preferred embodiment to describe, and should know, not represent to limit the invention among the said embodiment.On the contrary, the present invention will be contained alternative, modified and the equivalent in the scope of the present invention that can be included in attached claims qualification.
To shown in Figure 3, polylactic acid PLA thermoformed product production technology and the equipment introduced here generally are used for the polylactic acid PLA goods, yet should know that the present invention also can be used for the product producing process and the equipment of other materials referring to Fig. 1.The polylactic acid PLA thermoformed product production equipment; Comprise workpiece preheating block 2, heating furnace 3, mould 4; Said heating furnace 3 bottoms are provided with chain 6, respectively are provided with and the workpiece preheating block that send sheet chain 6 to match 2 on the charging aperture front end both sides of heating furnace 3, and workpiece preheating block is connected with the cylinder that is used for the workpiece preheating block move left and right.Said workpiece preheating block 2 is positioned at the extended line top that heating furnace 3 import departments send sheet chain 6.Said workpiece preheating block 2 length are consistent with mould 4 length, and width is 3cm-5cm, and thickness is 2cm-5cm.Said workpiece preheating block 2 coats heat-conducting block 9 by heating rod 8 and forms.Said heating furnace 3 is provided with upper heater and following heater.This polylactic acid PLA thermoformed product production technology, step is following: the first step, at first workpiece preheating block 2 is placed on preheating on polylactic acid PLA sheet material 1 both sides, workpiece preheating block 2 temperature are 50 ℃-80 ℃.Second step is by sending sheet chain 6 that the polylactic acid PLA sheet material after the preheating 1 is sent into heating furnace 3 heating, 170 ℃-270 ℃ of furnace temperature.In the 3rd step, the polylactic acid PLA sheet material after the heating is by sending sheet chain 6 to send into mould 4 thermoformings.In the 4th step, obtain required polylactic acid PLA thermoformed product 5.
Concrete principle of the present invention is following; Because material is more crisp under polylactic acid PLA sheet material 1 normal temperature; Directly when sending sheet chain 6 to transmit; Send the sprocket of sheet chain 6 to bore a hole when sending the sheet material process, cause 1 cracked causing of polylactic acid PLA sheet material can't send sheet material easily polylactic acid PLA sheet material 1 with completion.So the both sides, charging aperture the place ahead at upper and lower heating furnace 3 respectively are provided with and the workpiece preheating block that send sheet chain 6 to match 2.After a mould thermoforming was accomplished, when mould 4 upwardly opened, workpiece preheating block 2 upwardly opened through cylinder 7 synchronously, sent sheet chain 6 to start the length of polylactic acid PLA sheet material 1 being sent a mould 4 forward immediately.At this moment, polylactic acid PLA sheet material 1 carries out preheating and deliquescing through workpiece preheating block 2 being sent sheet chain 6 sprockets to send sheet when perforation, therefore not easily brokenly send the sheet material process with completion.Through 170 ℃-270 ℃ of the furnace temperature that set.Again through mould 4 thermoformings.Just can obtain required polylactic acid PLA moulded products 5.
Claims (2)
1. polylactic acid PLA thermoformed product production equipment; Comprise workpiece preheating block (2), heating furnace (3), mould (4); It is characterized in that: said heating furnace (3) inside is provided with send sheet chain (6); Be provided with and send the sheet chain workpiece preheating block that match (6) (2) at the charging aperture front end of heating furnace (3), workpiece preheating block (2) is connected with the cylinder (7) that is used for moving workpiece preheating block (2); Said workpiece preheating block (2) is positioned at the extended line top that heating furnace (3) import department send sheet chain (6); Said workpiece preheating block (2) is two, and is symmetrical set; Said workpiece preheating block (2) length is consistent with mould (4) length, and width is 3cm-5cm, thickness 2cm-5cm; Said workpiece preheating block (2) coats heat-conducting block (9) by heating rod (8) and forms; Be provided with upper heater and following heater in the said heating furnace (3).
2. polylactic acid PLA thermoformed product production technology that adopts polylactic acid PLA thermoformed product production equipment as claimed in claim 1, it is characterized in that: step is following:
The first step at first is placed on polylactic acid PLA sheet material (1) with workpiece preheating block (2) and goes up preheating, and workpiece preheating block (2) temperature is 50 ℃-80 ℃;
Second step is by sending sheet chain (6) that the polylactic acid PLA sheet material after the preheating (1) is sent into heating furnace (3) heating, 170 ℃-270 ℃ of furnace temperature;
In the 3rd step, the polylactic acid PLA sheet material after the heating (1) is by sending sheet chain (6) to send into mould (4) thermoforming;
In the 4th step, obtain required polylactic acid PLA thermoformed product (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101108335A CN101791856B (en) | 2010-02-10 | 2010-02-10 | Production process and device of polylactic acid PLA thermoformed product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101108335A CN101791856B (en) | 2010-02-10 | 2010-02-10 | Production process and device of polylactic acid PLA thermoformed product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101791856A CN101791856A (en) | 2010-08-04 |
| CN101791856B true CN101791856B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101108335A Active CN101791856B (en) | 2010-02-10 | 2010-02-10 | Production process and device of polylactic acid PLA thermoformed product |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395161A (en) * | 2013-07-19 | 2013-11-20 | 方毅 | Production technique of polylactic acid (PLA) product |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209957A (en) * | 1977-10-08 | 1980-07-01 | Ste d'Application Plastique, Mecanique et Electronique Plastique-Mecaniqu e | Arrangement and process for activating and arresting the operation of a heat-forming machine |
| CN1215018A (en) * | 1997-10-16 | 1999-04-28 | 洋亨企业有限公司 | A thermoforming device in continuous manufacturing of plastic shell equipment |
| CN2484170Y (en) * | 2001-05-31 | 2002-04-03 | 俞春明 | Gas-pressure thermal forming machine |
| CN1665670A (en) * | 2002-07-09 | 2005-09-07 | 埃卡丰信公司 | Apparatus for manufacturing articles by thermoforming blanks of thermoplastic material |
| CN101357506A (en) * | 2008-05-29 | 2009-02-04 | 郭军 | Production process and equipment of polylactic acid (PLA) sheet |
-
2010
- 2010-02-10 CN CN2010101108335A patent/CN101791856B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209957A (en) * | 1977-10-08 | 1980-07-01 | Ste d'Application Plastique, Mecanique et Electronique Plastique-Mecaniqu e | Arrangement and process for activating and arresting the operation of a heat-forming machine |
| CN1215018A (en) * | 1997-10-16 | 1999-04-28 | 洋亨企业有限公司 | A thermoforming device in continuous manufacturing of plastic shell equipment |
| CN2484170Y (en) * | 2001-05-31 | 2002-04-03 | 俞春明 | Gas-pressure thermal forming machine |
| CN1665670A (en) * | 2002-07-09 | 2005-09-07 | 埃卡丰信公司 | Apparatus for manufacturing articles by thermoforming blanks of thermoplastic material |
| CN101357506A (en) * | 2008-05-29 | 2009-02-04 | 郭军 | Production process and equipment of polylactic acid (PLA) sheet |
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| Publication number | Publication date |
|---|---|
| CN101791856A (en) | 2010-08-04 |
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