CN106363858B - EPS plastic foam releasing processes - Google Patents
EPS plastic foam releasing processes Download PDFInfo
- Publication number
- CN106363858B CN106363858B CN201611014860.6A CN201611014860A CN106363858B CN 106363858 B CN106363858 B CN 106363858B CN 201611014860 A CN201611014860 A CN 201611014860A CN 106363858 B CN106363858 B CN 106363858B
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- China
- Prior art keywords
- fore
- plastic foam
- thimble
- pumping rod
- mold
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Classifications
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- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention belongs to plastic foam production fields, disclose a kind of EPS plastic foams releasing process,（1）Thimble is mounted on to the side of mold；（2）Pumping rod is pulled, until whole fore-sets are all contracted in ontology；（3）Fore-set is kept to be contracted in ontology, until plastic foam is molded；（4）After plastic foam molding, inward pressure is applied to pumping rod, until fore-set extrudes this in vitro completely；（5）After keeping fore-set to be forced out this external 3min -5min, it is repeated in step（2）（3）（4）3 times -5 times.This programme pushes plastic foam using sheet metal, actually increases the contact surface to plastic foam, makes plastic foam stress evenly, compared with single use thimble ejects plastic foam, it is easier to make plastic foam break away from moulds body.
Description
Technical field
The invention belongs to plastic foam production fields, and in particular to a kind of EPS plastic foams releasing process.
Background technology
Plastic foam is due to its light, firm, shock-absorbing, the low moisture absorption, easily molded and good water resistance, thermal insulation, price
The features such as low, is widely used in the fields such as packaging, heat preservation, waterproof, heat-insulated, damping.Eps foam plastics are processed, are by EPS
After feed particles put into membrane cavity, is inputted and foamed using steam, then water flowing cools down in a mold, makes foamed product and metal die
Separation is to detach mold with foamed product；But by the way of steam demoulding, large amount of sewage is will produce, is unfavorable for protecting
Retaining ring border；And the plastic products after demoulding need to dry, and increase manufacturing procedure, influence production efficiency.
The Chinese patent literature of Publication No. CN201415457 discloses a kind of plastic products concealed thimble demoulding knot
Structure, including dynamic model and cover half, dynamic model and cover half cooperatively form the cavity of definite shape, and thimble is set to dynamic model, is also set on dynamic model
There are sliding block, the sliding block to be located between the top end part and product of thimble.Above-mentioned apparatus is by shoe contact on molded product, and
Thimble is hidden in the lower section of sliding block, does not participate in molding directly, avoids the occurrence of thimble trace and flash, when needing demolded article,
Sliding block slides, at this point, thimble moves upwards to eject product, completes article removal action.
The thimble of above structure needs mobile sliding block, after plastic shaping, sliding block is in plastics system when ejecting plastic products
It is difficult to be moved between product and thimble, and thimble causes thimble to be difficult to eject plastic products below sliding block, plastic products
Stripping result is not obvious；And the contact surface of thimble and plastic products is limited, since thimble structure is single, needs huge push away
Power could push up thimble, and then complete stripping operation；Operation is inconvenient.
Invention content
It is inconvenient to solve existing thimble stripping operation the invention is intended to provide a kind of EPS plastic foams releasing process, and
The problem of needing huge thrust that thimble could be pushed to complete stripping operation.
EPS plastic foam releasing processes in this programme, include the following steps：
(1) thimble is mounted on to the side of mold；
Thimble includes hollow ontology, and outer body face is equipped with the sheet metal of arc；There are one opening along the inner wall of ontology
The gas pressure relief slot of annular is provided with several through-holes in gas pressure relief slot, is equipped with a fore-set in each through-hole, fore-set be located within the body one
End is equipped with limiting plate, and fore-set is located at this external one end and is connect with sheet metal；Pumping rod, pumping rod and ontology are additionally provided in ontology
Inner wall is slidably connected；It is equipped with sealing on pumping rod and the contact surface of inner body wall and on the contact surface of each through-hole and fore-set
Circle；
(2) pumping rod is pulled, until whole fore-sets are all contracted in ontology；
(3) fore-set is kept to be contracted in ontology, until plastic foam is molded；
(4) after plastic foam molding, inward pressure is applied to pumping rod, is in vitro until fore-set extrudes this completely
Only；
(5) after keeping fore-set to be forced out this external 3min -5min, it is repeated in step (2) (3) (4) 3 times -5 times；
(6) mold is stood upside down, until plastic foam is discharged from mold.
The technical principle of this programme is, after plastic foam is molded in mold, pulls pumping rod, compresses inside thimble
Cavity, cavity volume reduce, and pressure increases；Fore-set is extended outwardly by the pressure of gas, since fore-set is located at one in thimble
End is equipped with limiting plate, and for fore-set when extending outwardly, limiting plate can limit the position of fore-set, to make fore-set be unlikely to the thimble that flies out
Outside.In addition, fore-set is located at the sheet metal that one end outside thimble is equipped with arc, when plastic foam is molded, arc metal plate
Concave surface is fitted on the outer surface of thimble, to reduce the molding space that arc metal plate occupies plastic foam；Fore-set is to top
When being stretched out outside needle, sheet metal is connect with thimble, therefore sheet metal will also extend outwardly, and sheet metal is contacted with plastic foam, from
And plastic foam is pushed to move, so that plastic foam is detached from mold.Concrete operations are as follows：
A, before the injection raw material into mold, thimble is mounted on mold body side surface first；Mold top surface when demoulding
It is open state, apply active force to top surface from mold body side surface using thimble is more easy to make since mold top surface does not have resistance
Plastic foam moves, and plastic foam is made to be detached with mold.
B, it before the injection raw material into mold, pulls pumping rod that the space inside thimble is made to become larger, forms negative pressure, fore-set
It will be contracted in thimble, since sheet metal is arc-shaped, sheet metal will be fitted on the outer surface of thimble at this time, to reduce arc
Sheet metal occupies the molding space of plastic foam.
C, after plastic foam is molded, active force is applied to pumping rod, pumping rod is made inwardly to move, to compress top
The inner wall space of needle keeps fore-set protruding to push sheet metal to extend outwardly, occupies the space in mold, and to plastics
Foam generates pressure, and plastic foam is made to move up.
D, it keeps fore-set to be forced out this external 3min -5min, plastic foam is made to have time enough break away from moulds body, and
Step 3 time -5 time above-mentioned (a) (b) (c) are repeated, with the stripping result of reinforced plastics foam.
E, mold is stood upside down, plastic foam is detached with mold inner wall after (a) (b) (c) (d) step, will
Mold stands upside down, and utilizes the gravity of plastic foam itself, you can be drawn off.
Inside movement as described herein refers to moving to mold internal direction；It moves out, refers to mold
Outside direction moves.
What this programme can generate has the technical effect that：This programme changes the space in thimble using pumping rod, to change top
Then air pressure in needle controls the position of fore-set, and then controls the position of sheet metal, final to utilize pressure of the metal to plastic foam
Power makes plastic foam break away from moulds body, completes stripping operation；Compared with prior art, this programme only needs to change pumping rod
Stripping operation can be completed in position, operates very simple；In addition, this programme pushes plastic foam using sheet metal, actually
It is the increase in the contact surface to plastic foam, makes plastic foam stress evenly, plastic foam phase is ejected with single use thimble
Than, it is easier to make plastic foam break away from moulds body.
Further, it is that pumping rod is pulled using cam mechanism in the step (2).Cam mechanism driving pumping rod inwardly or
Outside cycle movement, it is more efficient and more effortless compared with manually applying active force to pumping rod.
Further, the thimble in the step (1) is to be mounted on mold body side surface by screw-thread fit.Thimble and mold
Screw-thread fit can very easily take out thimble, cleaned and replaced to thimble.
Further, in the step (1), thimble is mounted in the edge placement that mold body side surface intersects with bottom surface.Herein
Position, sheet metal can apply thrust in mold bottom to plastic foam, to make entire plastic foam all by sheet metal
It pushes, to which entire plastic foam is all by the pressure to mold top surface direction, the disengaging range of plastic foam and mold
By bigger.
Further, fore-set is kept to be forced out originally external time as 3min in the step (5).Time is longer, when unit
Interior stripping result is poorer；It is found according to practice, keeps sheet metal that plastic foam 3min is pushed to be enough to make 80% plastic blister
Foam is detached with the contact surface of mold.
Further, step (2) (3) is repeated (4) 5 times, often repeatedly step (2) (3) (4) once is required for doing one to pumping rod
The energy of secondary work(, consumption is also more, and practice is found, it can be the plastic foam for making 95% or more to repeat step (2) (3) (4) 3 times
It is detached with the contact surface of mold, it is sufficient to complete stripping operation.
Further, after completing step (5), pumping rod is pulled on, until sheet metal is bonded with body outer wall；Finally take
Go out entire thimble.After taking out thimble, plastic foam is made to have certain mobile space, it is easier to make plastic foam and mold point
From.
Description of the drawings
Fig. 1 is the structural schematic diagram of EPS plastic foam releasing processes of the embodiment of the present invention.
Fig. 2 is the enlarged diagram of A in Fig. 1.
Specific implementation mode
Below by specific implementation mode, the present invention is described in further detail：
Reference numeral in Figure of description includes：Mold 1, plastic foam 2, thimble 3, fore-set 301, limiting plate 302,
Sheet metal 303, pumping rod 304, cam mechanism 4.
As depicted in figs. 1 and 2, a kind of thimble 3, including hollow ontology, outer body face are equipped with the sheet metal of arc
303；It opens that there are one the gas pressure relief slots of annular along the inner wall of ontology, is provided with several through-holes in gas pressure relief slot, one is equipped in each through-hole
Root fore-set 301, one end that fore-set 301 is located within the body are equipped with limiting plate 302, and fore-set 301 is located at this external one end and metal
Piece 303 connects；Pumping rod 304 is additionally provided in ontology, pumping rod 304 is slidably connected with inner body wall；In pumping rod 304 and ontology
On the contact surface of wall and each through-hole is equipped with sealing ring on the contact surface of fore-set 301.
A kind of EPS plastic foams releasing process, includes the following steps：
(1) edge placement intersected with bottom surface in 1 side of mold opens a threaded hole, and thimble 3 is inserted into threaded hole.
(2) cam mechanism 4 is connect with pumping rod 304, starting cam mechanism 4 pulls out pumping rod 304, works as whole
Fore-set 301 is all contracted in ontology, closes cam mechanism 4；
(3) fore-set 301 is kept to be contracted in ontology, until plastic foam is molded；
(4) after plastic foam molding after, be again started up cam mechanism 4, when fore-set 301 extrude completely this it is external when, again
Close cam mechanism 4.
(5) after keeping fore-set 301 to be forced out this external 3min, starting cam mechanism 4, and cam mechanism 4 is made to move for 5 week
After phase, thimble 3 is taken out.
(6) mold 1 is stood upside down, until plastic foam is discharged from mold 1.
Thimble 3 is threaded on mold 1 by this programme first, is driving pumping rod 304 outside using cam mechanism 4
Movement makes 3 inside of thimble form negative pressure, and fore-set 301 will be contracted in thimble 3, and sheet metal 303 will be also fitted on thimble 3.
After plastic foam molding, restarts the space in the compression thimble 3 of cam mechanism 4, so that fore-set 301 is extended outwardly, to drive
Sheet metal 303 is moved to 1 top surface of mold, and then applies the thrust to 1 top surface of mold, plastic blister to molding plastic foam
Foam will produce relative motion with 1 inner wall of mold, therefore plastic foam will be detached with 1 inner wall of mold.Due to the period of cam
Property movement, pumping rod 304 can be driven inwardly or outwardly to move back and forth；And pumping rod 304 drives fore-set 301 to move, fore-set 301
Sheet metal 303 is driven to move, therefore sheet metal 303 repeatedly will generate thrust to plastic foam；Until plastic foam break away from moulds
Until 1 inner wall of body.Finally, when sheet metal 303 is fitted on thimble 3, cam mechanism 4 is closed, thimble 3 is taken out, by mold 1
It stands upside down, until mold 1 is discharged in plastic foam.
This programme provides power compared with prior art, using cam mechanism 4, and operation is easier；And utilize sheet metal 303
Plastic foam break away from moulds body 1 is pushed, it is more efficient.
For those skilled in the art, without departing from the structure of the invention, several changes can also be made
Shape and improvement, these should also be considered as protection scope of the present invention, these all do not interfere with the effect and patent that the present invention is implemented
Practicability.
Claims (7)
1.EPS plastic foam releasing processes, which is characterized in that include the following steps：
（1）Thimble is mounted on to the side of mold；
Thimble includes hollow ontology, and outer body face is equipped with the sheet metal of arc；Along the inner wall of ontology open there are one annular
Gas pressure relief slot, be provided with several through-holes in gas pressure relief slot, a fore-set be equipped in each through-hole, one end that fore-set is located within the body is set
There are limiting plate, fore-set to be located at this external one end and connect with sheet metal；Pumping rod, pumping rod and inner body wall are additionally provided in ontology
It is slidably connected；It is equipped with sealing ring on pumping rod and the contact surface of inner body wall and on the contact surface of each through-hole and fore-set；
（2）Pumping rod is pulled, until whole fore-sets are all contracted in ontology；
（3）Fore-set is kept to be contracted in ontology, until plastic foam is molded；
（4）After plastic foam molding, inward pressure is applied to pumping rod, until fore-set extrudes this in vitro completely；
（5）After keeping fore-set to be forced out this external 3min -5min, it is repeated in step（2）（3）（4）3 times -5 times；
（6）Mold is stood upside down, until plastic foam is discharged from mold.
2. EPS plastic foams releasing process according to claim 1, it is characterised in that：The step（2）In be using convex
It takes turns mechanism and pulls pumping rod.
3. EPS plastic foams releasing process according to claim 1, it is characterised in that：The step（1）In thimble be
It is mounted on mold body side surface by screw-thread fit.
4. EPS plastic foams releasing process according to claim 1, it is characterised in that：The step（1）In, thimble is
The edge placement intersected with bottom surface mounted on mold body side surface.
5. EPS plastic foams releasing process according to claim 1, it is characterised in that：The step（5）Middle holding fore-set
It is 3min to be forced out this external time.
6. EPS plastic foams releasing process according to claim 1 or 4, it is characterised in that：Repeat step（2）（3）（4）5
It is secondary.
7. EPS plastic foams releasing process according to claim 1, it is characterised in that：Complete step（5）Afterwards, continue
Pumping rod is pulled, until sheet metal is bonded with body outer wall；Finally take out entire thimble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014860.6A CN106363858B (en) | 2016-11-18 | 2016-11-18 | EPS plastic foam releasing processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014860.6A CN106363858B (en) | 2016-11-18 | 2016-11-18 | EPS plastic foam releasing processes |
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| Publication Number | Publication Date |
|---|---|
| CN106363858A CN106363858A (en) | 2017-02-01 |
| CN106363858B true CN106363858B (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611014860.6A Active CN106363858B (en) | 2016-11-18 | 2016-11-18 | EPS plastic foam releasing processes |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108673817B (en) * | 2018-05-18 | 2020-06-02 | 遵义市剑龙塑料泡沫制品有限公司 | EPS foam mold |
| CN110497570A (en) * | 2019-07-25 | 2019-11-26 | 桐乡市佑昌包装材料有限公司 | A kind of EPS plastic foam releasing process |
| CN111941714B (en) * | 2020-07-03 | 2022-06-28 | 东莞市天沛塑料有限公司 | EPS plastic foam demolding process |
| CN113352532B (en) * | 2021-04-28 | 2023-04-25 | 济南泉之韵家用电器有限公司 | Quick compression molding and effective demoulding device for air conditioner external unit mounting plate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4235776C2 (en) * | 1992-10-23 | 1997-01-09 | In Tec Ges Fuer Innovative Tec | Mold for producing plastic parts and method for producing such a mold |
| US5728333A (en) * | 1995-12-25 | 1998-03-17 | Bridgestone Corporation | Method for making and then removing a molded article of rigid polyurethane foam from a mold |
| CN201283629Y (en) * | 2008-11-21 | 2009-08-05 | 宁波远东制模有限公司 | Automatic shedding apparatus for deep cylinder mould ejection |
| CN203622851U (en) * | 2013-12-19 | 2014-06-04 | 宁波南方塑料模具有限公司 | Mechanical spacing and ejecting device of mold |
| CN203792582U (en) * | 2014-04-24 | 2014-08-27 | 宁波市益普乐模塑有限公司 | Straight ejection type SMC mould for forming automobile lampshades |
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| CN106363858A (en) | 2017-02-01 |
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Address after: 563319 in the 532 plant area, Fenghua Town, Suiyang County, Zunyi City, Guizhou Province Patentee after: Guizhou Jianzhan Technology Co.,Ltd. Address before: 563319 in the 532 plant area, Fenghua Town, Suiyang County, Zunyi City, Guizhou Province Patentee before: ZUNYI JIANLONG PLASTIC FOAM PRODUCTS Co.,Ltd. |