CN204869607U - Plastics storage tank by parison blow molding - Google Patents
Plastics storage tank by parison blow molding Download PDFInfo
- Publication number
- CN204869607U CN204869607U CN201520051735.7U CN201520051735U CN204869607U CN 204869607 U CN204869607 U CN 204869607U CN 201520051735 U CN201520051735 U CN 201520051735U CN 204869607 U CN204869607 U CN 204869607U
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- China
- Prior art keywords
- storage tank
- parison
- impeller
- welding groove
- mould
- 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.)
- Expired - Fee Related
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- 238000003860 storage Methods 0.000 title claims abstract description 64
- 229920003023 plastic Polymers 0.000 title claims abstract description 13
- 239000004033 plastic Substances 0.000 title claims abstract description 13
- 238000000071 blow moulding Methods 0.000 title claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 41
- 238000007373 indentation Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 55
- 238000007664 blowing Methods 0.000 description 12
- 238000007493 shaping process Methods 0.000 description 9
- 230000004888 barrier function Effects 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000001174 ascending effect Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002650 laminated plastic Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001470 polyketone Polymers 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a plastics storage tank by parison blow molding, this storage tank surface (7) bellied shape is followed including welding slot (5) promptly to the storage tank, the shape has to be welded attaches the last edge of corresponding side reason that connects part (3), welding slot (5) is in the inboard of storage tank (1) terminates in the axial in passing through contact between parison (18) and the first molding component (21) and the fashioned structure of molding.
Description
Technical field
The utility model relates to the manufacture of storage tank, the especially fuel tank that plastic material is made.
Background technology
In order to manufacture the storage tank that plastic material is made, multilayer parison (" paraisons ") can be used, comprise the multilayer parison of the barrier layer be such as made up of EVOH especially therein.So-called parison is the extruded profile being introduced into sheet in mould or tubulose, and produces superpressure in this extruded profile, makes it be covered on mould, forms desired storage tank shape to make it.
In order to attachment component being welded on plastics storage tank, known setting welds groove (" goulottesdesoudure "), namely have the shape of the projection at the edge being generally plane, this edge can be heated, to be welded on the corresponding edge of attachment component.Attachment component can be ascending pipe, pipe union, ventilation duct, and this exemplifies list is nonrestrictive.
Welding the shaping of groove realizes at the insufflation stage of parison, and the material of pattern of wants parison flows significantly, fills the special die cavity of the outer shape limiting welding groove to make described material.
In some cases, due to this flowing, the barrier layer being arranged in parison inside is quite dark at this die cavity relocation site, and can quite near the region for welding of welding groove.This region is generally limited on the thickness of distance welding number of planes millimeter.
Utility model content
Theme of the present utility model is the storage tank be made up of the plastic material of parison blow molding, this storage tank comprises welding groove, namely from the shape of storage tank convex outer surfaces, this shape has the edge that can be soldered on the corresponding edge of attachment component, and described welding groove ends at the molded and shaped structure by the contact between parison and the first molded element in the axial direction in the inner side of storage tank.
According to some can use singly or in combination favourable of the present utility model but optional feature:
-welding groove ends at ringwise inner raised edge in the axial direction in the inner side of storage tank;
-welding groove ends at the molded and shaped structure by the contact between parison and the second molded element in the axial direction in the outside of storage tank;
-welding groove ends at ringwise radial plane surface in the axial direction in the outside of storage tank;
-welding groove comprises the ringwise inner raised edge relative to radial plane surface indentation;
-welding groove has non-rotating shape, to have better mechanical strength.
The utility model is also intended to the new method proposing a kind of shaping welding groove in the air blowing process of parison.
According to the method, in the blowing mould comprising two mould parts and a core rod, implement following steps, one in the described mould part cavity being defined for shaping welding groove, described cavity has the opening in the face of core rod opens wide:
-on core rod, impeller is arranged to the opening of the cavity of described mould part, this impeller can be in relative to cavity indentation primary importance and occupy the second place of a cavities open part;
-impeller is placed in its primary importance;
-blowing moulding is carried out to parison, with the shape making it form mould part;
-at parison between cavity inside flow periods, impeller is advanced in its second place.
By means of the utility model, the existence of impeller in cavities open limits the welding region migration of barrier layer to welding groove of parison.
In a preferred embodiment, also movable block part is set on mould part, cavity is limited with the side on impeller opposite, this movable block part can be in primary importance and the second place, the volume of cavity is little in the second place than in primary importance, further, at parison between cavity inside flow periods, movable block part is in its second place.
Practically, more simply, by maximum for the volume that the motion of movable block part is set to the cavity when movable block part is in its primary importance, and the volume of cavity is minimum when movable block part is in its second place.
Barrier layer maintains away from welding region part further enhancing in the promotion flowing into the material in cavity by movable block part.
In a specific embodiment of the present utility model, the motion of movable block part and the motion of impeller are carried out simultaneously.
Alternately, the motion of movable block part starts after the motion of impeller.
In a specific embodiment of the present utility model, impeller comprises head and shoulder.
Preferably, the size of impeller to be provided so that in the second place and between the head of impeller and parison, to reserve gap on the direction of the motion transverse to impeller.Such gap is by such as following following formula to obtain, in this formula, A is the distance between impeller head and mould part measured in the impeller direction of motion, B is the distance between the head of the impeller measured on the direction of the motion transverse to impeller and mould part, C is the distance between the shoulder of the impeller measured in the direction of motion of impeller and mould part: A=4/B, and C >=6mm.
According to structure, distance C corresponds to the thickness of parison at impeller shoulder place.
According to the utility model, " plastic material " refers to the material comprising the polymer that at least one is made up of synthetic resin.
All types of plastic material can be suitable.Most suitable plastic material belongs to thermoplastic class.
" thermoplastic " refers to any thermoplastic polymer, comprising thermoplastic elastomer (TPE) and composition thereof." polymer " refers to homopolymers and copolymer (especially bipolymer or terpolymer).Without limitation, the example of this copolymer is: random copolymer, sequential copolymer, block copolymer and graft copolymer.
The fusion temperature of any type is less than the thermoplastic polymer of decomposition temperature or copolymer is all suitable.The synthetic thermoplastic material with the thawing scope containing at least 10 degrees Celsius is specially suitable.The example of this material is the synthetic thermoplastic material that its molecular mass has polydispersity.
Especially, polyolefin, thermoplastic polyester, polyketone, polyamide can be used, and the copolymer of these materials.Also the mixture of polymer or copolymer can be used, even can use the polymeric material mixture with inorganic, organic and/or natural fillers, wherein said filler is such as but is not restricted to: carbon, salt and other inorganic derivatives, natural fiber or polymer fiber.Can also use by comprise at least one in above-mentioned polymer or copolymer, the sandwich construction that is made up of the binder course stacked.
A kind of conventional polymer is polyethylene.High density polyethylene (HDPE) (PEHD) is used to obtain good effect.Preferably, storage tank also comprises the layer of the impermeable resin of fuel, and wherein said resin is such as EVOH (ethylene-vinyl acetate copolymer of partial hydrolysis).Alternately or stackablely, in order to make storage tank be impermeable for fuel, storage tank can stand surface treatment (fluoridizing or sulfonation).
Accompanying drawing explanation
The accompanying drawing provided by reading exemplarily, can understand the utility model not in any limiting sensely better.In the drawings:
Fig. 1 is the front view of the fuel tank being provided with fuel filler tube;
Fig. 2 is the sectional view of the part II of the storage tank of Fig. 1, it illustrates the welding groove meeting the first embodiment;
Fig. 3 is the birds-eye perspective with a part of II;
Fig. 4 is the sectional perspective view of the planar I II-III along Fig. 3;
Fig. 5 be similar with Fig. 4, along the view of the planar I V-IV vertical with planar I II-III;
Fig. 6 is view that is similar with Fig. 2, another embodiment of the present utility model;
Fig. 7 be similar with Fig. 6, along the view of vertical cross-sectional plane.
Detailed description of the invention
Referring now to Fig. 1, there is the storage tank 1 of general shape in the figure as seen.In fact, the shape of storage tank depends on vehicle, but in scope of the present utility model, the shape of storage tank is unessential, and the utility model is suitable for the storage tank of any shape.This storage tank is by manufacturing parison in blowing mould (not shown) inside as is known.In EP1110697A2, such as describe the example of a this manufacture, the content of this example is in this manual involved by reference.
Described storage tank is the storage tank of the multilayer be made up of the high density polyethylene (HDPE) (PEHD) with at least one deck EVOH (ethylene-vinyl acetate copolymer of partial hydrolysis), this evoh layer ensure that the sealing for hydrocarbon, and is called as " barrier layer ".
Storage tank 1 comprises fuel filler tube 3, and it is used to the oil filler point (not shown) and the storage tank 1 that connect vehicle.Ascending pipe 3 is connected with storage tank 1 by welding.For this reason, ascending pipe at least in the contact area of these two soldered elements to be formed with the material of the material compatibility being formed storage tank.
In order to weld with ascending pipe 3, storage tank is included in visible welding groove 5 in Fig. 3 to Fig. 5.
Welding groove 5 protrudes from the outer surface 7 of storage tank, and here, the shape of welding groove is the revolution projection of amplifying shape on the whole in opening, and ends at ringwise radial plane surface 9 in the axial direction.
Plane surface 9 is face of weld, and after making parison formation by air blowing, the end of fuel filler tube 3 is soldered on this plane surface, to seal and firmly described fuel filler tube 3 is attached on storage tank 1 by mode.
Visible in the diagram, except plane surface 9, welding groove 5 in the outside of storage tank, there is inner raised edge 11, this inner raised edge as plane surface 9 towards the outside of storage tank 1.Inner raised edge 11 forms the annular less relative to the diameter of plane surface 9 indentation.This ring is flat, and is parallel to described surperficial 9.Due to the existence of inner raised edge 11, the inner surface 13 of groove 5 ends at the shape of amplifying in opening on the whole, and the cross section of this shape is stepped.The shape of plane surface 9 and inner raised edge 11 can be arbitrary, as long as these shapes allow to use welding groove to be connected to by storage tank on the external accessory of such as ascending pipe 3, but according to the utility model, as visible hereinafter, it is molded that these shapes come from through the contact between sheet material 18 (or more generally, parison) and molded element and obtain.
In the inner side of storage tank, welding groove ends at the second inner raised edge 14 of similar first inner raised edge 11 in the axial direction, and namely it forms the annular little relative to the diameter of inner surface 8 indentation of storage tank.The shape of inner raised edge 14 can be arbitrary, but according to the utility model, this shape comes from through the molded of contact moudling between sheet material 18 (or more generally, parison) and molded element.
As seen in fig. 5, except two except the relative depression in diameter two ends 17 (at Fig. 3 and 4 visible), the exterior side surfaces 15 of welding groove 5 is columniform.
These depressions 17 for fastening reprocessing instrument, to implement the perforation of last processing and groove 5 as mentioned below especially after being molded at storage tank on storage tank.
In addition, these depressions 17 prevent welding groove to have revolution shape (being namely all indeclinable in the whole rotation of its axis), and according to the test that inventor carries out, this makes welding groove have better mechanical strength.
Be described in now and meet method of the present utility model in a concrete non-limiting example.
As described in EP1110697A2, the parison be made up of two laminated plastics material sheets 18 is extruded from extrusion die, and drops in mould (not shown).
This mould comprises complementary two half-unit and divides (being called as shell or die or mould part) and a central core rod that can be inserted between two shells.
According to this known method, once two of parison sheet materials drop between mould part from the both sides of core rod, each of two mould parts closes on core rod, with first time close die.Then between core rod and each sheet material of parison, produce the superpressure of gas (being generally air), to make sheet material be covered on the inwall of mould part, and give sheet form.This step is called as air blowing.While air blowing, to make to be pre-installed on core rod and the annex carried by suitable bascule advances towards the direction of one or the other sheet material, be covered on this sheet material, and be welded on this sheet material.This operation allows in storage tank, insert various annex (such as: Ventilating valve and pipeline), and does not need to be introduced in mould by these annexes after storage tank is molded.After this shaping, two mould parts of a sheet material of each carrying parison separate with core rod, and core rod is then removed between two mould parts.Finally, two mould parts are close to each other with second time close die, and make two sheet materials be contacted by its periphery specifically, these peripheries are welded to one another to make storage tank shaping.
During this known method of enforcement, implement the utility model theme of the application when blow step.
Function desired by storage tank, shaping welding groove on one or two sheet materials 18 single that may be required in parison.Here only the utility model is described for the single welding groove on single sheet material 18, but this is not in any limiting sense.
Figure 2 illustrates two movable plug-in units 19 and 21 of sheet material 18 both sides of the parison laying respectively at extruding, hereinafter referred to as movable block part 19 and impeller 21.Impeller 21 is (not shown by core rod; Relative to Fig. 2, this core rod is positioned at the below of sheet material 18) carrying, movable block part 19 is then (not shown by two mould parts; Relative to Fig. 2, the mould part of carrying movable block part 19 is positioned at the top of sheet material 18) carry.Around movable block part 19, shell also comprises the ditch channel mould 23 being divided into two part 23A and 23B, wherein said two parts can move in the plane of this diagram between open position and closing position as shown in Figure 2, on described open position, these two part 23A and 23B each with another be apart enough to make groove shaping in its ditch channel mould 23 after the distance of the demoulding.
Ditch channel mould 23 is defined for the cavity 31 of shaping welding groove together with movable block part 19.This cavity 31 has the opening 25 in the face of core rod opens wide.
Impeller 21 comprises head 21A and shoulder 21B.Impeller is positioned at the opposite of the opening 25 of cavity 31.This impeller can be in relative in the primary importance (visible in fig. 2) of cavity 31 indentation and the second place shown in broken lines in fig. 2, and in this second place, impeller occupies a part for the opening 25 of cavity 31.The motion of impeller 21 from primary importance to the second place is illustrated by arrow 27.
Movable block part 19 itself also can as shown in arrow 29ly move between retracted position as shown in Figure 2 and extrusion position shown by dashed lines.
Thus, movable block part 19 can be in primary importance and the second place, and in primary importance, the volume of cavity 31 is maximum, and in the second place, the volume of cavity 31 is minimum.
In the second place being called extrusion position, movable block part 19 is pressed on the plastic material of parison, and gives its net shape by dotted line limit in the mould part side of mould by molded.
In the primary importance being called retracted position, under the effect of the superpressure of material when mould core side is subject to thrust, blow step especially at parison of parison, movable block part 19 just allows the material of parison advance in cavity 31.
In order to implement the utility model, implement following steps when the blow step of storage tank forming method.
In this stage, the parison be made up of two sheet materials 18 is extruded, and each sheet material 18 is between to be inserted in two mould parts of core rod and mould each.Mould closes on core rod.
Impeller 21 and movable block part 19 are placed in their primary importance.Ditch channel mould 23 is closed on the position of Fig. 2.
Then, between each sheet material 18 and core rod, inject pressurized air, with the shape making each sheet material form mould part, this sheet material is also covered on this mould part thus.This air blowing causes the plastic material of sheet material 18 towards cavity 31 and the flowing at this cavity inside.Therefore, in core side, sheet material 18 forms spill 18A.
When the material of sheet material 18 is towards cavity 31 internal flow, impeller 21 is made to be advanced to its second place shown by dashed lines.The head 21A of impeller enters into cavity 31, and shoulder 21B then leans on sheet material 18.Therefore, as shown by dashed lines, sheet material 18 forms the shape corresponding to core side.Especially, impeller 21 plays the effect of the molded element for sheet material, and forms the plane 30 corresponding to following inner raised edge 14.
In the second time, be arranged in by movable block part 19 in its second place shown by dashed lines, wherein said second time determines according to the operating condition (these operating conditions are especially by the limit temperature of the element of the thickness of parison, the time span of air blowing and pressure, existence) of blowing.
Thus, sheet material 18 forms corresponding shape, namely has above with reference to the ringwise radial plane surface 9 described in Fig. 4 and the inner plane 12 corresponding to following inner raised edge 11.In other words, movable block part 19 plays the effect of the molded element for sheet material 18.
Once impeller 21 and movable block part 19 both arrive their second place, impeller and movable block part all keep motionless, until blow step terminates.According to the molded parameters of storage tank, the utility model can carry out (in this case in whole blow step, the utility model starts with injection pressurized air simultaneously, and terminate when stopping air blowing pressure), or can only carry out during a part of blow step (such as, the utility model can start and/or terminated before stopping air blowing pressure after injection air).
After sheet material 18 is cooled to be enough to allow the storage tank demoulding, two mould parts of mould are separated, and ditch channel mould 23 is opened, and storage tank is by the demoulding.
Then, operated by reprocessing, to the wall of storage tank at its enterprising eleven punch 11 of whole thickness between plane 12 and plane 30, to cut the inner surface 13 of groove and to limit inner raised edge 11 and 14.For this reason, use perforating tool, this instrument is fastened in the depression 17 of groove 5.
In the embodiment of Fig. 6 and Fig. 7, use impeller 21 ', the head 21 ' A of this impeller is less than the head 21A of above-mentioned impeller 21.Therefore, impeller 21 ' reserves sideshake between sheet material 18 and head 21 ' A, and this sideshake can control the flowing of material better when welding ditch Slot shaping.
Consider the distance A between impeller head 21 ' A and mould part measured in the direction of motion of impeller, distance B between the impeller head 21 ' A that the direction of moving transverse to impeller is measured and mould part, and the distance C between the impeller shoulder 21 ' B measured in the impeller direction of motion and mould part, observe ratio A/B and be less than 4, and the numerical value of C is less than 6mm.
Inventor is demonstrating according to the measurement that the storage tank of the utility model manufacture is implemented, and the barrier layer distance surface 9 of multilayer parison is sufficiently far away, can not damage this barrier layer after making this surface 9 with welding of attachment component (such as: ascending pipe).The suitable position of this barrier layer in tank wall comes from when blow step, the effect of impeller 21, and is strengthened by the effect of movable block part 19.
In addition, for the multilayer parison comprising pure material and salvage material (such as coming from the recovery of dead meal), the distribution of the layer of multilayer parison keeps considerably even, if and there is no the effect of impeller 21, just can observe, can be tending towards lacking pure material in welding groove, and occur too much salvage material.
The utility model is not restricted to shown embodiment, and other embodiments are apparent for a person skilled in the art.
Claims (6)
1. by the plastics storage tank (1) of parison (18) blow molding, described storage tank comprises welding groove (5), namely from the shape that this storage tank outer surface (7) is protruding, it is characterized in that, described shape has the edge on the corresponding edge that can be soldered to attachment component (3), and described welding groove (5) ends at the molded and shaped structure by the contact between described parison (18) and the first molded element (21) in the axial direction in the inner side of described storage tank (1).
2. storage tank as claimed in claim 1, it is characterized in that, described in the inner side of storage tank (1), by the contact between parison (18) and the first molded element (21), molded and shaped structure is ringwise inner raised edge (14).
3. the storage tank according to any one of claim 1 and 2, it is characterized in that, described welding groove (5) ends at the molded and shaped structure by the contact between described parison (18) and the second molded element (19) in the axial direction in the outside of described storage tank.
4. storage tank as claimed in claim 3, is characterized in that, described in the outside of storage tank, by the contact between parison (18) and the second molded element (19), molded and shaped structure is ringwise radial plane surface (9).
5. storage tank as claimed in claim 4, it is characterized in that, described welding groove (5) comprises the ringwise inner raised edge (11) relative to the indentation of described radial plane surface (9).
6. storage tank as claimed in claim 1, it is characterized in that, described welding groove (5) has non-rotating shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520051735.7U CN204869607U (en) | 2015-01-23 | 2015-01-23 | Plastics storage tank by parison blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520051735.7U CN204869607U (en) | 2015-01-23 | 2015-01-23 | Plastics storage tank by parison blow molding |
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| Publication Number | Publication Date |
|---|---|
| CN204869607U true CN204869607U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520051735.7U Expired - Fee Related CN204869607U (en) | 2015-01-23 | 2015-01-23 | Plastics storage tank by parison blow molding |
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| Country | Link |
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| CN (1) | CN204869607U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220059A (en) * | 2019-06-24 | 2019-09-10 | 亚普汽车部件股份有限公司 | A kind of fuel oil box ventilation system |
-
2015
- 2015-01-23 CN CN201520051735.7U patent/CN204869607U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220059A (en) * | 2019-06-24 | 2019-09-10 | 亚普汽车部件股份有限公司 | A kind of fuel oil box ventilation system |
| CN110220059B (en) * | 2019-06-24 | 2024-03-08 | 亚普汽车部件股份有限公司 | Fuel tank ventilation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20220123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |