CN102179918B - Device for blow molding of hollow box - Google Patents
Device for blow molding of hollow box Download PDFInfo
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- CN102179918B CN102179918B CN 201110086506 CN201110086506A CN102179918B CN 102179918 B CN102179918 B CN 102179918B CN 201110086506 CN201110086506 CN 201110086506 CN 201110086506 A CN201110086506 A CN 201110086506A CN 102179918 B CN102179918 B CN 102179918B
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Abstract
The invention discloses a device for the blow molding of a hollow box, belonging to the technical field of fuel tanks. The device for the blow molding of the hollow box comprises a left half die, a right half die and a pre-forming die plate in the middle, wherein the pre-forming die plate is formed by butting a pre-forming front die plate and a pre-forming rear die plate; vertical parison channels are arranged between the left and right end faces of the pre-forming die plate and the left and right half dies; the longitudinal sections of the joint lines of the parison channels respectively comprise a straight segment and a curved segment; the middles of the curved segments are corners; the upper and lower ends of the curved segments are respectively in smooth transition connection with corresponding straight segments; the distance between the straight segments is B; the vertical height of the curved segments is H; the length of the center lines of the curved segments is m; and the distance between the corners of the curved segments is D=B*H/m. A guide hole and a guide pillar are arranged on the end face where the pre-forming front die plate and the pre-forming rear die plate are jointed; and a position sensor is arranged at the bottom of the die hole. By using the device, no void is generated at the corners of the curved segments between the parisons and the dies, the air tightness of the whole structure is ensured and the pre-forming quality of the box is improved.
Description
Technical field
The present invention relates to a kind of device of blow molding hollow box body, belong to the fuel tank technical field.
Background technology
Publication number is the Chinese invention patent application of CN101633240, but a kind of forming method and preforming mould panel assembly of blow molding hollow box body of installed with built-in component are disclosed, relate generally to one for the needs of the low discharge vaporization fuel oil casing of two sheet parison productions, intermediate demand have one independently mechanism be that the preformed template realizes the realization of the operation of installed with built-in component is convenient in two independent moulding of parison.
The device of blow molding hollow box body comprises left half module, right half module and preformed template, left half module, right the half module periphery of die cavity separately are spue line, the preformed template is between left half module and right half module, the preformed template is formed by the docking of preformed front template and preformed rear pattern plate, and preformed front template and preformed rear pattern plate lay respectively on separately movable base.Be respectively equipped with vertical parison passage between left and right both ends of the surface after the docking of preformed template and left half module and right half module.The spue line of parison passage does not often in one plane have more turning, and namely from the spue line longitudinal section, spue line comprises straight section and tune, and the middle part of tune is the turning, and the two ends up and down of tune are connected with corresponding straight section smooth transition respectively.
Whole manufacturing process comprises following step:
1. cutting forms two independently hither plane parisons to the parison of the common die head plasticizing of extruding through the sheet body forming device;
2. two sheet parisons enter into respectively the parison passage between preformed template and left half module, right half module;
3. when parison touched the movable base of preformed template, parison was by the clamping of lamellar body expanding mechanism and short-distance movement, and parison is evened up;
4. left half module, right half module are adjacent to respectively the preformed template from the left and right sides, utilize blow needle to blow, and make two parisons be adjacent to respectively die cavity inwall at left half module, right half module, two parison preformed fully;
Left half module, right half module respectively to the left and right both sides open, preformed front template and preformed rear pattern plate also separately forwards, backwards direction remove;
6. in the middle of the built-in mechanism lowering or hoisting gear was pushed into left half module, right half module with the assembly built-in mechanism from the below, inner surface that assembly is connected with pre-shaping parison connected;
7. the built-in mechanism lowering or hoisting gear is pulled out the assembly built-in mechanism, left half module, right half module closure, and the spue line of two parisons bonds together, and the final blow molding moulding obtains the hollow box body of inner portable unit;
8. the hollow blow molding casing withdraws from mould.
Present device: the spacing of parison passage straight section is B, and the spacing of tune is identical with straight section is also B, namely the parison passage from top to bottom spacing equate.Its weak point is: the position, turning of parison passage is more violent to the draw ratio of parison, and parison has the trend of attenuation at tune.If setting the thickness of parison blanking is 10mm, and the spacing of mould and preformed template is 10mm, tune zone in these shape sudden changes, can produce certain space between parison and mold cavity wall, often can reach 3mm, namely parison can not be adjacent on the die cavity wall of mould, causes can not guaranteeing integrally-built air-tightness when pre-blowing, hot blast spills from the gap of parison and mold cavity wall, and gas leakage can affect the preformed quality of casing.In addition, during gas leakage, a large amount of heat exchanges of inside and outside existence of mould cause the temperature of parison to reduce, and may cause parison to harden, and are unfavorable for the realization that next procedure connects some installed with built-in component and parison.
Summary of the invention
The object of the invention is to, overcome problems of the prior art, a kind of device of blow molding hollow box body is provided, make parison in the preformed process, the die cavity wall the corner of spue line also can be adjacent to mould guarantees integrally-built air-tightness.
For solving above technical problem, the device of a kind of blow molding hollow box body provided by the present invention, comprise left half module, right half module and preformed template, described preformed template is between left half module and right half module, described preformed template is formed by preformed front template and the docking of preformed rear pattern plate, be respectively equipped with vertical parison passage between the left and right both ends of the surface of described preformed template and described left half module and right half module, the spue line longitudinal section of described parison passage comprises straight section and tune; The middle part of described tune is the turning, and the two ends up and down of described tune are connected with corresponding straight section smooth transition respectively; The spacing of described straight section is B, and the vertical height of described tune is H, and the center curve length of described tune is m, and the spacing of described tune corner is D, D=B * H/m.
With respect to prior art, the present invention has obtained following beneficial effect: the spacing of parison passage longitudinal section straight section is B, and in production, the thickness of parison comes blanking according to the spacing of straight section, i.e. the thickness of parison blanking is also B; The vertical height of tune is H, although parison is in the tune attenuation that is stretched, but its volume V at tune remains unchanged, the width of the vertical height H of the thickness B * tune of V=parison blanking * parison, wherein parison is not compared with straight section at the width of tune and is changed, and parison is at the vertical height H of the thickness B * tune of the area S=parison blanking of tune longitudinal section; Parison is stretched at tune, and its actual height at tune is drawn as m, so parison is at the actual (real) thickness B ' of tune=S/m=B * H/m; Device of the present invention is at the space D=B of tune corner * H/m, be the thickness B of parison ' equal the space D of tune corner, parison will fill up the tune corner of parison passage, can not produce the space between parison and mold cavity wall, integrally-built air-tightness is guaranteed, has improved the preformed quality of casing.
As improvement of the present invention, be respectively equipped with mutually adaptive guide hole and guide pillar on the end face that described preformed front template and preformed rear pattern plate fit, described guide hole bottom is provided with the position sensor of surveying described guide pillar insertion depth.When preformed front template and the docking of preformed rear pattern plate, both draw close under the driving of movable base respectively mutually, and guide pillar inserts in guide hole and gradually deeply, plays on the one hand positioning action, guarantees that the docking location of preformed front template and preformed rear pattern plate is accurate; On the other hand, whether the position sensor of guide hole bottom puts in place when detecting the each closure of two templates, and carry out quantitative monitoring with regard to the degree that puts in place, will send warning by control system in case closed situation not in place occurs, prevent from preformed front template and preformed rear pattern plate docking generation not in place gap from having influence on integrally-built air-tightness.
As another improvement of the present invention, the inner chamber of described preformed template is equipped with the air blowing means for diverging, described air blowing means for diverging comprises the air blowing spheroid and is connected on the air blowing spheroid and to the high-pressure air pipe of air blowing spheroid air feed, the surface of described air blowing spheroid is provided with a plurality of gas holes, each gas hole is radial even distribution, and the other end of described high-pressure air pipe is connected with high-pressure air source.This air blowing means for diverging is connected with the external high pressure source of the gas, provides gases at high pressure in the preformed stage, and evenly blows to all directions by the air blowing spheroid, has improved the stability of properties of product when carrying out parison preformed.
Improve as another of the present invention, be separately installed with the heat conduction bar along parison spue line zone on the left and right both ends of the surface of described preformed front template and preformed rear pattern plate, described heat conduction bar is consistent with described spue line trend and be connected with the die heater that is used for heating the parison spue line is heated.The molding time of two parison matched moulds technique needs is slightly long, easily make the temperature of spue line position parison inadequate, spue line mass formation impact on last matched moulds shaped article, after the heat conduction bar is set, can utilize die heater that the spue line zone is heated, the parison that makes the spue line position is unlikely to cooling rapidly and affects the performance of spue line, when causing last mold closing spue line because temperature is lower degradation.
As a further improvement on the present invention, described heat conduction bar is bonded on described preformed template by the poor cured epoxy resin of heat conductivility.The heat conduction bar is connected connection and is adopted the poor material of heat conductivility with the preformed template, can reduce scattering and disappearing of heat conduction bar self heat, keeps the temperature of heat conduction bar within limits.
Description of drawings
Fig. 1 is the general structure schematic diagram of the device of blow molding hollow box body of the present invention.
Fig. 2 is the Profile Correlation figure of existing parison passage and parison passage of the present invention.
Fig. 3 is the elevational view after preformed front template and the combination of preformed rear pattern plate.
Fig. 4 is the partial sectional view on preformed front template and preformed rear pattern plate top in Fig. 3.
In figure: 1 left half module; 1 ' right half module; 2 preformed front templates; The 2a guide hole; The 2b position sensor; 2 ' preformed rear pattern plate; 2a ' guide pillar; 3 front movable bases; Movable base after 3 '; 4 lowering or hoisting gears; 5 air blowing spheroids; The 5a high-pressure air pipe; 6 heat conduction bars; 7 parisons.
The specific embodiment
As shown in Figure 1, the device of blow molding hollow box body of the present invention comprises left half module 1, right half module 1 ' and preformed template, the preformed template is positioned between left half module 1 and right half module 1 ', the preformed template is formed by preformed front template 2 and the 2 ' docking of preformed rear pattern plate, preformed front template 2 is positioned on front movable base 3, and preformed rear pattern plate 2 ' is positioned on rear movable base 3 '.Lowering or hoisting gear 4 is positioned at the below of front movable base 3 and rear movable base 3 ', is respectively equipped with vertical parison passage between the left and right both ends of the surface of preformed template and left half module 1 and right half module 1 '.
Whole manufacturing process comprises following step:
1) cutting forms two independently hither plane parisons to the parison of the common die head plasticizing of extruding through the sheet body forming device;
2) two sheet parisons enter into respectively the parison passage between preformed template and left half module 1, right half module 1 ';
When 3) parison touched the movable base of preformed template, parison was by the clamping of lamellar body expanding mechanism and short-distance movement, and parison is evened up;
4) left half module 1, right half module 1 ' are adjacent to respectively the preformed template from the left and right sides, to blowing in die cavity, make two parisons be adjacent to respectively die cavity inwall at left half module 1, right half module 1 ', two parison preformed fully;
5) left half module 1, right half module 1 ' respectively to the left and right both sides open, preformed front template 2 and preformed rear pattern plate 2 ' also separately forwards, backwards direction remove;
6) the built-in mechanism lowering or hoisting gear is pushed into the assembly built-in mechanism in the middle of left half module 1, right half module 1 ' from the below, and inner surface that assembly is connected with pre-shaping parison connects;
7) the built-in mechanism lowering or hoisting gear is pulled out the assembly built-in mechanism, left half module 1, right half module 1 ' closure, and the spue line of two parisons bonds together, and the final blow molding moulding obtains the hollow box body of inner portable unit;
8) the hollow blow molding casing withdraws from mould.
In Fig. 1 for simplicity, left half module 1, side that right half module 1 ' is relative with the preformed template have been drawn as the plane, reality aborning, because the shape matching of casing is complicated, the spue line that the left and right of parison is two often is not in same plane, be rough situation to occur between the left surface of the left half module 1 of Fig. 1 and preformed template, also rough situation can occur between the right flank of preformed template and right half module 1 '.From the spue line longitudinal section of parison passage, can comprise straight section and tune from top to bottom, the middle part of tune is the turning, the two ends up and down of tune are connected with corresponding straight section smooth transition respectively.
As shown in Figure 2, take the right flank of preformed template and the parison passage between right half module 1 ' as example, the spacing of parison passage longitudinal section straight section is B, in production, the thickness of parison 7 comes blanking according to the spacing of straight section, the thickness that is parison 7 blankings also is B, the vertical height of certain tune is H, and the center curve length of tune is m.
In Fig. 2 (1) to be depicted as the parison actual volume that is filled in tune suitable with corresponding straight section, sectional area S=B * H.
In Fig. 2 (2) to be depicted as the spacing of existing tune identical with straight section be also B, namely the parison passage from top to bottom spacing equate.When parison 7 enters tune, position, tune turning is more violent to the draw ratio of parison 7, parison 7 is only B ' at the actual (real) thickness of tune corner, can produce certain space e between parison 7 and mold cavity wall, e=B-B ', namely parison 7 can not be adjacent on the die cavity wall of mould, causes can not guaranteeing integrally-built air-tightness when pre-blowing, hot blast spills from the gap of parison and mold cavity wall, and gas leakage can affect the preformed quality of casing.In addition, during gas leakage, a large amount of heat exchanges of inside and outside existence of mould cause the temperature of parison to reduce, and may cause parison to harden, and are unfavorable for the realization that next procedure connects some installed with built-in component and parison.
The vertical height of tune is H, although parison is in the tune attenuation that is stretched, but its volume V at tune remains unchanged, the width of the vertical height H of the thickness B * tune of V=parison blanking * parison, wherein parison is not compared with straight section at the width of tune and is changed, and parison is at the vertical height H of the thickness B * tune of the area S=parison blanking of tune longitudinal section; Parison is stretched at tune, and its actual height at tune is drawn as m, so parison is at the actual (real) thickness B ' of tune=S/m=B * H/m;
In Fig. 2, (3) are depicted as the present invention the spacing of parison passage have been done improvement, and the spacing of tune corner is for being reduced to D, D=B * H/m.The present invention compared with prior art is equivalent to the right flank of preformed template in the tune corner template distance of having drawn close e to the right; Device of the present invention is at the space D=B of tune corner * H/m, be the thickness B of parison ' equal the space D of tune corner, parison will fill up the tune corner of parison passage, can not produce the space between parison and mold cavity wall, integrally-built air-tightness is guaranteed, has improved the preformed quality of casing.
As shown in Figure 3, the inner chamber of preformed template is equipped with the air blowing means for diverging, the air blowing means for diverging comprises air blowing spheroid 5 and is connected on air blowing spheroid 5 and to the high-pressure air pipe 5a of air blowing spheroid 5 air feed, the surface of air blowing spheroid 5 is provided with a plurality of gas holes, each gas hole is radial even distribution, and the other end of high-pressure air pipe 5a is connected with high-pressure air source.This air blowing means for diverging is connected with the external high pressure source of the gas, provides gases at high pressure in the preformed stage, and evenly blows to all directions by air blowing spheroid 5, has improved the stability of properties of product when carrying out parison preformed.
Be separately installed with heat conduction bar 6 along parison spue line zone on the left and right both ends of the surface of preformed front template 2 and preformed rear pattern plate 2 ', heat conduction bar 6 is consistent with the spue line trend and be connected with the die heater that is used for heating the parison spue line is heated.The molding time of two parison matched moulds technique needs is slightly long, easily make the temperature of spue line position parison inadequate, spue line mass formation impact on last matched moulds shaped article, after heat conduction bar 6 is set, can utilize die heater that the spue line zone is heated, the parison that makes the spue line position is unlikely to cooling rapidly and affects the performance of spue line, when causing last mold closing spue line because temperature is lower degradation.
As shown in Figure 4, the end face of preformed front template 2 is provided with guide hole 2a, the end face of preformed rear pattern plate 2 ' is provided with guide pillar 2a ', and the shape size of guide pillar 2a ' and guide hole 2a is suitable, and guide hole 2a bottom is provided with the position sensor 2b that surveys guide pillar 2a ' insertion depth.The position of guide pillar and guide hole can exchange, and also can on the end face of preformed front template 2 and the 2 ' docking of preformed rear pattern plate, guide pillar and the guide hole that many groups are pegged graft mutually be set.When preformed front template 2 and the 2 ' docking of preformed rear pattern plate, both draw close under the driving of movable base respectively mutually, guide pillar inserts in guide hole and gradually deeply, plays on the one hand positioning action, guarantees that the docking location of preformed front template 2 and preformed rear pattern plate 2 ' is accurate; On the other hand, whether the position sensor 2b of guide hole bottom puts in place when detecting the each closure of two templates, and carry out quantitative monitoring with regard to the degree that puts in place, will send warning by control system in case closed situation not in place occurs, prevent from preformed front template 2 and preformed rear pattern plate 2 ' docking generation not in place gap from having influence on integrally-built air-tightness.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (3)
1. the device of a blow molding hollow box body, comprise left half module, right half module and preformed template, described preformed template is between left half module and right half module, described preformed template is formed by preformed front template and the docking of preformed rear pattern plate, be respectively equipped with vertical parison passage between the left and right both ends of the surface of described preformed template and described left half module and right half module, the spue line longitudinal section of described parison passage comprises straight section and tune; The middle part of described tune is the turning, and the two ends up and down of described tune are connected with corresponding straight section smooth transition respectively; The spacing of described straight section is B, and the vertical height of described tune is H, and the center curve length of described tune is m, it is characterized in that: the spacing of described tune corner is D, D=B * H/m.
2. the device of blow molding hollow box body according to claim 1, it is characterized in that: be respectively equipped with mutually adaptive guide hole and guide pillar on the end face that described preformed front template and preformed rear pattern plate fit, described guide hole bottom is provided with the position sensor of surveying described guide pillar insertion depth.
3. the device of blow molding hollow box body according to claim 1 and 2, it is characterized in that: the inner chamber of described preformed template is equipped with the air blowing means for diverging, described air blowing means for diverging comprises the air blowing spheroid and is connected on the air blowing spheroid and to the high-pressure air pipe of air blowing spheroid air feed, the surface of described air blowing spheroid is provided with a plurality of gas holes, each gas hole is radial even distribution, and the other end of described high-pressure air pipe is connected with high-pressure air source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110086506 CN102179918B (en) | 2011-04-07 | 2011-04-07 | Device for blow molding of hollow box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110086506 CN102179918B (en) | 2011-04-07 | 2011-04-07 | Device for blow molding of hollow box |
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| CN102179918A CN102179918A (en) | 2011-09-14 |
| CN102179918B true CN102179918B (en) | 2013-06-05 |
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| CN 201110086506 Active CN102179918B (en) | 2011-04-07 | 2011-04-07 | Device for blow molding of hollow box |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103507262B (en) * | 2012-06-19 | 2016-08-31 | 亚普汽车部件股份有限公司 | A kind of ducted body forming method being provided with installed with built-in component |
| CN102962981A (en) * | 2012-08-31 | 2013-03-13 | 武汉亚普汽车塑料件有限公司 | Blow molding formation method of blow molding machine and blow molding die thereof |
| CN110667017B (en) * | 2019-10-08 | 2021-10-12 | 平湖新仕鑫新材料股份有限公司 | Shaping equipment for positioning luggage accurately by utilizing air pressure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611344A (en) * | 2003-10-27 | 2005-05-04 | 蔡桂森 | Mould clamping means for flastic bottle-blowing machine |
| CN101633240A (en) * | 2009-08-19 | 2010-01-27 | 亚普汽车部件有限公司 | Forming method of blow molding hollow box body capable of internally provided with assembly and preformed molding plate device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1142699A (en) * | 1997-07-28 | 1999-02-16 | Japan Steel Works Ltd:The | Mold clamping device of blow molder |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611344A (en) * | 2003-10-27 | 2005-05-04 | 蔡桂森 | Mould clamping means for flastic bottle-blowing machine |
| CN101633240A (en) * | 2009-08-19 | 2010-01-27 | 亚普汽车部件有限公司 | Forming method of blow molding hollow box body capable of internally provided with assembly and preformed molding plate device |
Non-Patent Citations (1)
| Title |
|---|
| JP特開平11-42699A 1999.02.16 |
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