CN109049599A - A kind of extrusion method of the overall plastic lampshade of LED - Google Patents
A kind of extrusion method of the overall plastic lampshade of LED Download PDFInfo
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- CN109049599A CN109049599A CN201811042947.3A CN201811042947A CN109049599A CN 109049599 A CN109049599 A CN 109049599A CN 201811042947 A CN201811042947 A CN 201811042947A CN 109049599 A CN109049599 A CN 109049599A
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- 239000004033 plastic Substances 0.000 title claims abstract description 37
- 229920003023 plastic Polymers 0.000 title claims abstract description 37
- 238000001125 extrusion Methods 0.000 title claims abstract description 31
- 238000009826 distribution Methods 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000008676 import Effects 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 5
- 238000005192 partition Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000206 moulding compound Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- -1 wall unevenness Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/747—Lightning equipment
- B29L2031/7472—Lampshades
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of extrusion methods of the overall plastic lampshade of LED, including mold, the mold includes connector, flow distribution plate and die head, the connector is connect with the flow distribution plate, to form an import, two with the flow path of upper outlet, the die head is installed in the exit of the flow path respectively, and plastic melt is extruded machine and squeezes into through the import of the flow path, and it is evenly directed to respectively by the flow path to the die head, then squeezed out from the outlet of the die head.Extrusion method of the invention is simple and easy to do, mould structure is more flexible, the selection to flow distribution plate can be passed through, realize that one goes out more particular demands, when producing different types of product, only need to change die head or mold core, significant increase production efficiency, production cost is reduced, while there is the stable molding effect of high quality.
Description
Technical field
The present invention relates to LED lamp cover fields, and in particular to a kind of extrusion method of the overall plastic lampshade of LED.
Background technique
With the drive to the basket of LED the relevant technologies, with the LED lamp cover of plastic material production due to insulation, lightweight, shine it is equal
The speciality such as even, excellent heat radiation performance, safety are largely popularized, and overall plastic lampshade becomes the main force of LED lamp tube.The overall plastic lampshade of LED is logical
It is often all by extruder using PC material through mold extrusion molding, wherein matter of the mold for processing efficiency and shaped article
Amount plays a crucial role.
Extrusion molding is carried out on extruder, and extruder is one of the main equipment of plastics processing machinery, greatly
Partial thermoplastic can be transferred through dedicated extrusion molding apparatus and be made, and the product produced by extrusion molding is wide
General is applied to people's lives and agricultural, construction industry, petrochemical industry, the industrial departments such as machine-building, national defence.Produce LED
The equipment of lampshade includes that the extruder set gradually, shaping equipment, cooling device and traction cutter device, mold are mounted on extrusion
The extruding end of machine.
It is current on the market, the overall plastic lampshade of general LED, all be using 1 go out 1 integral type stent squeeze out molding side
Plastics under molten condition are passed under pressure through 1 by extruder and go out 1 Integral die (single tube extruded type, primary by method
One can be squeezed out) it squeezes out, to obtain section and die orifice hole shape approximately overall plastic lampshade product.When needing short time high-volume raw
When production, it is necessary to while a plurality of production line ability meet demand is opened, correspondingly, the costs such as water power, personnel significantly increase.
The mouth mold and mold core of traditional mold are mostly complete circle, when producing special-shaped lampshade, such as the lamp of D character form structure
Pipe (refers to Figure 11), and the parison for being originally used for arc-shaped is finalized linear structure, void in Figure 11 by force at the bottom of traditional moulds
Often more glue, wall unevenness, product local location stress are concentrated for corner shown in line, ageing-resistant performance decline, and product
Easily there is situations such as ripple glaze in surface.
For tradition when carrying out a more samples out to mold, melt is inconsistent in the plastic emitting speed and gel quantity of each runner, leads
The structural instability of extruded product is caused, surface is also easy to produce ripple glaze, correspondingly, increases tune machine number, and loss increases.
Summary of the invention
Inventor makes discovery from observation, and existing mold is due to being integrated structure, and shape is fixed, not only the development cycle
It is long, at high cost, and the shape on the one hand squeezed out through it is non-adjustable, and poor universality, another aspect production efficiency is low, prior
It is using existing mold, it is difficult to which high quality meets the need of short time, the overall plastic lampshade of LED for producing same type specification in enormous quantities
It asks, therefore proposes a kind of extrusion method of overall plastic lampshade of LED, can or meet short time, big at least to a certain extent
The demand of batch high quality of production same type specification product.The invention is realized by the following technical scheme: a kind of overall plastic lamp of LED
The extrusion method of cover, including mold, the mold include connector, flow distribution plate and die head, the connector and the flow distribution plate
Connection, to form an import, two with the flow path of upper outlet, the die head, plastic melt are installed in the exit of the flow path respectively
It is extruded machine to squeeze into through the import of the flow path, and is evenly directed to respectively by the flow path to the die head, then from the mould
The outlet of head squeezes out.
Preferably, the plastic melt is divided into two equal portions or quarter by the flow path.
Preferably, the flow path includes trunk flow path and branch flow passage, and the trunk flow path is equipped with homogenizing plate, the branch
In horn-like at the outlet end of flow path.
Preferably, the die head includes machine neck, mouth mold, adjusts bolt, spreader and mold core, the machine neck and the mouth mold
Connection is to form die cavity, and the spreader is connect with the mold core, and is fixedly arranged in the die cavity, adjusting bolt drawing-in institute
It states machine neck and is abutted with the side wall of the mouth mold, for adjusting the spacing between the mouth mold and the mold core.
Preferably, the connection between the mold core and the spreader is to be detachably connected.
Preferably, the die head further includes bracket, and one end of the mouth mold has flange arrangement, and one end of the machine neck has
There is hierarchic structure, the spreader has flanged structure, and the bracket is connect with the machine neck, so that the mouth mold and described point
Flow cone is secured in a press along its axis direction, has gap between the hierarchic structure and the flange arrangement.
Preferably, multiple adjusting bolts are abutted with the periphery of the flange arrangement.
Preferably, the die head is for producing special-shaped lampshade, the outside table of the inner surface of the mouth mold and the mold core
Face has the structure to match with the surfaces externally and internally of the lampshade of production.
Extrusion method of the invention is simple and easy to do, and mould structure is more flexible, can realize one by the selection to flow distribution plate
More particular demands out when producing different types of product, only need to change die head or mold core, significant increase production effect
Rate reduces production cost, while having the stable molding effect of high quality；Mold can timing, can reduce and repair a die, shorten exploitation
Period, reduce molding cost, improve the versatility of mold, suitability is more preferable, can application range it is bigger.
Detailed description of the invention
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is the schematic perspective view of mold of the embodiment of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the perspective structure schematic diagram of flow distribution plate in Fig. 1；
Fig. 4 is the sectional view of Fig. 1；
Fig. 5 is the enlarged drawing of die head in Fig. 4；
Fig. 6 is the explosive view of die head in Fig. 1；
Fig. 7 is the front view of another embodiment of the present invention mold；
Fig. 8 is the side view of Fig. 7；
Fig. 9 is B-B direction cross-sectional view in Fig. 8；
Figure 10 is the explosive state perspective structure schematic diagram of mouth mold and mold core in Fig. 9；
Figure 11 is the sectional view of the lampshade squeezed out in Fig. 7.
Corresponding as follows, the connector 1 of each label in figure, flow distribution plate 2, first partition 20, second partition 21, fixation hole 22, point
Outflux 23, the first die head 3, machine neck 31, spreader 32 flow chamber 321, and fixation hole 322 adjusts bolt 33, bracket 34, bolt
35, mouth mold 36, mold core 37, bolt 38, lampshade 39, level-one flow distribution plate 201, second level flow distribution plate 202, second flow path 2010, the 4th
Flow path 2020, the second die head 4.
Specific embodiment
The present invention is further described With reference to embodiment:
As an example, the mold of the present embodiment production overall plastic lampshade of LED, as shown in figures 1 to 6, including connector 1,
Flow distribution plate 2 and die head, die head include the first die head 3 and the second die head 4.
Specifically, connector 1 has external screw thread, connect for the extruding end with extruder, connector 1 has provided first-class
The middle part on road, first flow path is equipped with first partition；As shown in figure 3, the top of flow distribution plate 2 is equipped with feed inlet, it is equipped at feed inlet
Second partition 21, bottom are equipped with two symmetrically arranged shunting outlets 23, and feed inlet and first, second shunts between outlet 23 respectively
Connection forms second flow path and third flow path, is additionally provided on flow distribution plate 2 multiple for fixing the fixation hole 22 of die head.Connector 1
It is connect by bolt with flow distribution plate 2, so that first flow path and second, third fluid communication form the flow path of one-to-two, the flow path
It symmetrically and is in Y-shaped, trunk flow path is symmetrically divided by first partition, second partition 21, first partition and second
Homogenizing plate is played the role of in the linking of partition 21, in use, the plastics of molten state can be evenly directed to two affluent-dividings by homogenizing plate
Road is preferably in horn-like at the outlet end of branch flow passage.The stability of above structure significant increase melt flowing, makes moulding compound
Plastifying state is more preferable, shortens the melt residence time, reduces melt residual stress, makes melt that can uniformly be flowed into the first die head
3 and second in die head 4, and the pressure drop of die head is made to be lower, and can realize that one goes out two stable molding effect.
It continuing to refer to figure 1, shown in Fig. 2 and Fig. 4, the first die head 3 is bolted on the bottom of flow distribution plate 2, so that the
The die cavity of one die head 3 and the shunting outlet of a branch flow passage；Second die head 4 is bolted on the bottom of flow distribution plate 2,
So that the shunting outlet of the die cavity of the second die head 4 and another branch flow passage, wherein the first die head 3 and the second die head 4 have
Identical structure and symmetrical setting.Extrusion efficiency is effectively promoted in one mold for going out two structures, and extrusion efficiency can
Reach 1.8 times that original one goes out an extrusion process method, reduces product processing cost, more preferably improve the competitiveness of product.
Die head as seen in figs. 5-6, including machine neck 31, mouth mold 36, adjusts bolt 33, spreader 32 and mold core 37, machine neck 31
Up and down with mouth mold 36, machine neck 31 and mouth mold 36 are assembled together to form die cavity by bracket 34, spreader 32 and mold core
37 are fixedly arranged in die cavity, and specifically, the inner surface of 31 lower part of machine neck has hierarchic structure, and the outer surface on 36 top of mouth mold has method
Blue structure, the middle part of spreader 32 have a flanged structure, and mold core 37 is removably installed in point by bolt 38 and fixation hole 322
It at the bottom of flow cone 32, adjusts 33 drawing-in machine neck 31 of bolt and is abutted with the flange arrangement of mouth mold 36, bracket 34 and machine neck 31 are logical
Cross the connection of bolt 35, and mouth mold 36 and spreader 32 be secured in a press along its axis direction, the flanged structure of spreader 32 with
It fits closely and is positioned between the hierarchic structure of machine neck 31, and then be kept fixed the position of mold core 37, the ladder of machine neck 31
There are gap, multiple peripheries for adjusting bolt 33 and being evenly arranged on the flange arrangement of mouth mold 36 between structure and the flange arrangement of mold core 37
And abutted with it, by adjusting the precession of bolt 33, screw out, can position to mouth mold 36 carried out along its vertical axis direction
Adjustment, can be adjusted the spacing between mouth mold 36 and mold core 37, is adjusted so as to the structure to product.The structure mentions significantly
The adjustability of product processing is risen, structure is more flexible reliable, the number that repairs a die can be reduced, so as to shorten development cycle, drop
Low molding cost when producing different types of product, only needs to change mold core 37, and other components can share, and suitability is more
It is good, can application range it is bigger.For example, only needing replacing mold core, the present embodiment when the tubing LED lamp tube of production different structure
Mold especially suitable for producing all kinds of circular LED lamp tubes.
It should be understood that uniformly distributed at the flange mechanism of spreader 32 have stream chamber 321, for by the modeling of molten state
Material is evenly directed to mold core 37.
It should be noted that in order to keep moulding compound performance stabilization, the stabilization of extrusion die temperature, every part of die head is excellent
Choosing is equipped with controllable heater and carries out heated for controlling temperature, and correspondingly, each major part is preferably provided with temp probe, temp probe with
Master control set connection, master control set is based on the temperature signal control heater heating received, and preferably machine neck 31, mouth mold 36 are equipped with
Temp probe.
Using the method for the mold production overall plastic lampshade of LED of the present embodiment, connector 1 and flow distribution plate 2 are connected, to form one
The flow path of import, two outlets, the first die head 3 and the second die head 4 are respectively installed in the exit of flow path, and melt is extruded machine and squeezes into
Flow path, and be evenly directed to respectively by flow path to the first die head 3 and the second die head 4, after flowing into die head, by the steady of machine neck 31
Stream, the shunting of spreader 32, mouth mold 36 and mold core 37 molding three phases after, from die head extrusion plastic parison, using gas
After gap, the stock mould being formed on sink is entered by traction and carries out shaping and cools down, eventually becomes plastic product.
As another example, the present embodiment produces the mold of the overall plastic lampshade of LED, as Figure 7-9, including connector
1, flow distribution plate and die head, wherein the structure of connector 1 and die head is identical as the structure of above-mentioned example.
Specifically, connector 1 has provided first flow path, and the middle part of first flow path is equipped with first partition 20.
Flow distribution plate includes level-one flow distribution plate 201 and second level flow distribution plate 202, and 201 bilateral symmetry of level-one flow distribution plate, top is set
There is a feed inlet, be equipped with second partition 21 at the feed inlet, the bottom of level-one flow distribution plate 201 is equipped with two and symmetrically arranged distributes
Mouthful, it is respectively communicated with to form second flow path 2010 and third flow path between feed inlet and two shunting outlets.
202 bilateral symmetry of second level flow distribution plate, top are symmetrically arranged with two feed inlets, and bottom is set there are four shunting outlet,
And it is respectively communicated between the feed inlet of 202 side of second level flow distribution plate and two shunting outlets and to form the 4th flow path 2020 and the 5th stream
Road is respectively communicated with to form the 6th flow path and the 7th stream between the feed inlet of 202 other side of second level flow distribution plate and another two shunting outlet
Road.
Connector 1, level-one flow distribution plate 201 and second level flow distribution plate 202 are fixedly connected sequentially and fit together, so that first-class
Road and second flow path 2010, third fluid communication form the flow path of one-to-two, and the flow path is symmetrically and in Y-shaped, trunk
Flow path is symmetrically divided by first partition 20, second partition 21, and homogenizing plate is played in first partition 20 and the linking of second partition 21
Effect；Second flow path 2010 and the 4th flow path 2020, the 5th fluid communication form the flow path of one-to-two, correspondingly, third stream
Six flow path of Lu Yu, the 7th fluid communication also form the flow path of one-to-two.Four die heads are separately mounted to second level flow distribution plate 202
Four shunting exits.The mold of the structure further increases extrusion efficiency, yield can in addition to an effect for four may be implemented
Go out 3.8 times of a mold up to tradition one, it is often more important that, can also make one go out four flow path walk glue more evenly, heating it is more convenient
Controllably, connector 1, level-one flow distribution plate 201 and second level flow distribution plate 202 be assembled together installation after do not need again to dismantle it
Or adjustment, and can be public, keep the product homogeneity squeezed out by the mold more preferable.Correspondingly, which can be greatly lowered and set
It is standby purchase, the costs such as water power and manpower.
When it is implemented, in addition to the oral area at both ends, middle part is preferably in straight flow path shape for second flow path 2010 and third flow path,
And direction bore gradual change is fed out along it and is reduced；Correspondingly, the 4th flow path 2020 and the 5th flow path are when it is implemented, except both ends
Outside oral area, middle part is it is also preferred that be in straight flow path shape, and feed out direction bore gradual change along it and reduce.The structure can avoid melt and exist
Flow-disturbing is generated when flowing in flow path, is detained, so that melt is pressurized more balanced, and overall flow is more smooth reliable, and melt temperature changes one
It causes.
When installation, first connector 1 is connect with extruder, then level-one flow distribution plate 201 is installed using bolt with connector 1
It is fixed, second level flow distribution plate 202 is fixed using the same installation of fraction flowing plate 201 of bolt then, finally adopts four die heads respectively
It is fixedly installed on second level flow distribution plate 202 with bolt, it is a set of to be completed once the mold for going out four.
During formed product, firstly, the plastics of the molten state to be come by extruder push enter connector 1 and carried out
Drainage is crossed, level-one flow distribution plate 201 is then flowed into, second level flow distribution plate 202 is diverted to using level-one flow distribution plate 201, by second level
The transition drainage again of flow distribution plate 202, the plastics of molten state are divided into uniform quarter, respectively enter four moulds
Head, to realize that one goes out four extrusions.When it is implemented, it is preferred that at the shunting connector of two pieces of flow distribution plates all design have it is horn-like
Runner, the structure have reduce die head pressure, reinforced plastics plasticizing, avoid sizing material delay cause to burn, reduce melt remnants answer
The advantages that power, can greatly promote the stability of melt flows, guarantee that melt can smoothly, be smoothly flowed into die head, to realize
One goes out four stable extrusion effect.
The present embodiment also improves the structure of mouth mold 36 and mold core 37, to be preferably suitable for producing special-shaped lamp
Cover.
Specifically, together with reference to shown in Figure 10 and Figure 11, by taking the lampshade 39 of D character form structure as an example, 36 inner surface of mouth mold
It is consistent with the structure matching of the inner and outer surfaces of lampshade 39 respectively with the structure of 37 outer surface of mold core, allow plastics still in molten state
When just form corresponding D word shape, which has cut down undesirable stress, can make 39 wall thickness of lampshade more evenly, and then avoid wave
The appearance of Slippage and more glue phenomenons, the structure by its lampshade 39 squeezed out is more stable and reliable, and dependent loss index is greatly reduced, and squeezes
The stability of special-shaped round tube product structure greatly improves out.
Using the method for the mold production overall plastic lampshade of LED of the present embodiment, connector 1 and level-one flow distribution plate 201, two fractions
Flowing plate 202 connects, and to form the flow path of an import, four outlets, die head is respectively installed in four exits of flow path, and melt is extruded
Machine squeezes into flow path, and be evenly directed to respectively by flow path to die head, after flowing into die head, by the current stabilization of machine neck 31, spreader
After the molding three phases of shunting, mouth mold 36 and mold core 37, from die head extrusion plastic parison, after air gap, drawn
Enter the stock mould being formed on sink to carry out shaping and cool down, eventually becomes plastic product.
Due to molten state plastics from extruder extrusion after need by runner it is longer, for make plastics keep molten state,
It is preferred that tunable heaters are installed in each part of level-one, second level flow distribution plate and die head, while installing temperature-sensing probe pair additional
The real time temperature of mold is monitored, and stablizes flow distribution plate and die head temperature, and then guarantees that plastic emitting is stablized, to can avoid temperature
Excessively high occur burning or temperature is too low the phenomenon that plastic emitting is difficult, die pressure increases occurs.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Illustrative description is carried out to the invention patent above, it is clear that the realization of the invention patent is not by aforesaid way
Limitation, as long as use the invention patent method concept and technical solution carry out various improvement, or it is not improved will this
The conception and technical scheme of patent of invention directly apply to other occasions, are within the scope of the invention.
Claims (8)
1. a kind of extrusion method of the overall plastic lampshade of LED, which is characterized in that including mold, the mold includes connector, flow distribution plate
And die head, the connector are connect with the flow distribution plate, to form an import, two with the flow path of upper outlet, the flow path goes out
The die head is installed respectively at mouthful, and plastic melt is extruded machine and squeezes into through the import of the flow path, and equal by flow path difference
It is directed to the die head evenly, then is squeezed out from the outlet of the die head.
2. extrusion method according to claim 1, which is characterized in that the plastic melt is divided into second-class by the flow path
Part or quarter.
3. extrusion method according to claim 1, which is characterized in that the flow path includes trunk flow path and branch flow passage,
The trunk flow path is equipped with homogenizing plate, is in horn-like at the outlet end of the branch flow passage.
4. extrusion method according to claim 1, which is characterized in that the die head include machine neck, mouth mold, adjust bolt,
Spreader and mold core, the machine neck are connect to form die cavity with the mouth mold, and the spreader is connect with the mold core, and fixed
In in the die cavity, machine neck described in the adjusting bolt drawing-in is simultaneously abutted with the side wall of the mouth mold, for adjusting the mouth
Spacing between mould and the mold core.
5. extrusion method according to claim 4, which is characterized in that the connection between the mold core and the spreader is
It is detachably connected.
6. extrusion method according to claim 4, which is characterized in that the die head further includes bracket, and the one of the mouth mold
End has flange arrangement, and one end of the machine neck has hierarchic structure, and the spreader has flanged structure, the bracket and institute
State the connection of machine neck so that the mouth mold and the spreader are secured in a press along its axis direction, the hierarchic structure with it is described
There is gap between flange arrangement.
7. extrusion method according to claim 6, which is characterized in that multiple adjusting bolts and the flange arrangement
Periphery abuts.
8. extrusion method according to claim 4, which is characterized in that the die head is for producing special-shaped lampshade, the mouth
The outer surface of the inner surface of mould and the mold core has the structure to match with the surfaces externally and internally of the lampshade of production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811042947.3A CN109049599A (en) | 2018-09-04 | 2018-09-04 | A kind of extrusion method of the overall plastic lampshade of LED |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811042947.3A CN109049599A (en) | 2018-09-04 | 2018-09-04 | A kind of extrusion method of the overall plastic lampshade of LED |
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| CN109049599A true CN109049599A (en) | 2018-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116714215A (en) * | 2023-06-20 | 2023-09-08 | 山东华纳塑胶集团有限公司 | Plastic pipe extruder die head |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116714215A (en) * | 2023-06-20 | 2023-09-08 | 山东华纳塑胶集团有限公司 | Plastic pipe extruder die head |
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Application publication date: 20181221 |
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