CN106881848A - PVC electrician's pipe processing mold with visual window - Google Patents
PVC electrician's pipe processing mold with visual window Download PDFInfo
- Publication number
- CN106881848A CN106881848A CN201710114429.7A CN201710114429A CN106881848A CN 106881848 A CN106881848 A CN 106881848A CN 201710114429 A CN201710114429 A CN 201710114429A CN 106881848 A CN106881848 A CN 106881848A
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- China
- Prior art keywords
- flow
- flow channel
- runner
- mold
- visual window
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000000007 visual effect Effects 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
- B29C48/705—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a kind of PVC electrician's pipe processing mold with visual window；Including external mold, external mold offers two flow channel entry points；The inner chamber of external mold is provided with flow passage distributor and the flow passage distributor core for connecting and the mouth mold being sheathed on the outside of core；Co-extruding flow channel is formed between core and mouth mold；Flow passage distributor is provided with two runners, and two one end of runner connect from different flow channel entry points respectively, the other end with co-extrusion flow passage；Two flow channel entry points can be connected from the different extruders for extruding transparent and nontransparent material；The different material that two flow channel entry points enter can in the circumferential be realized a certain proportion of distribution by flow passage distributor by structure design, the steady flow of the material in two runners is ensure that simultaneously, and material ultimately forms the PVC electrician with visual window and manages through co-extruding flow channel；The reasonable in design of processing mold described in the invention, can produce meet performance requirement with visual window PVC electrician pipe.
Description
Technical field
The invention belongs to technical field of mold, more particularly, to a kind of PVC electrician's pipe processing mold with visual window.
Background technology
PVC electrician's pipe has lightweight, low cost, inner wall smooth, threading resistance small and the anti-corruption of flame-resistant insulation chemically-resistant
The good advantage of corrosion energy, as electric conduit (hidden pipe), also can be used as general duct (bright pipe) and post and telecommunications, network cloth
Line pipe etc. is widely used between the concrete of architectural engineering, floor or within the walls.
At present, mostly injected material using extruder in the production of PVC electrician's pipe is carried out in PVC electrician's pipe processing mold
Extrusion molding, PVC electrician's pipe of common mould extrusion is opaque pipe, and opaque electrician's pipe is carrying out threading construction
When, it has not been convenient to the particular location of electric wire is grasped, wiring is both not easy to due to opaque when being used for post and telecommunications network as bright pipe,
Also maintenance is not easy to, comfort level is not as good as wire casing.
The content of the invention
In view of this, the invention be directed to a kind of reasonable in design, for processing the PVC with visual window
The processing mold of electrician's pipe, to solve the above problems.
To reach above-mentioned purpose, what the technical scheme of the invention was realized in：
A kind of PVC electrician's pipe processing mold with visual window, including first flow is offered on the left of external mold described in external mold
Entrance, upper end offers second flow channel entrance；The inner chamber of the external mold is provided with flow passage distributor and flow passage distributor connection
Core and the mouth mold that is sheathed on the outside of the core；Co-extruding flow channel is formed between the core and the mouth mold；The runner
Distributor includes spreader and the dividing bushing that is sheathed on the outside of the spreader, and the cone angle of the spreader is towards first flow
Entrance；The flow cavity that circumferential cross-section is annular is formed between the spreader and the dividing bushing, has edge in the flow cavity
The flow cavity is divided into axially arranged flow distribution plate, the flow distribution plate first flow of lower section and the second flow channel of top,
The material inlet end of first and second runner connects with the first flow entrance and second flow channel entrance respectively, material outlet
End with co-extrusion flow passage；
Further, one section of the left side of co-extruding flow channel runner is the gradual change runner that external diameter is tapered into from left to right, right
One section of runner of side then matches with electrician's tubular construction.
Further, there are two axially disposed deflectors in the first flow, two deflectors exist
Radially symmetrical, the first flow is divided into three runners by two deflectors, respectively positioned at described in two
Lower runner between deflector and the left shunt road above two deflectors, right runner；The spreader
Cone angle upper side wall circumferentially offers guiding gutter, and the two ends of the guiding gutter connect with the left shunt road and right runner respectively
It is logical.
Further, the external mold includes flow passage distributor matching board, is fixed on the left of the flow passage distributor matching board
Offer the first merging core of first flow entrance, the flow passage distributor matching board upper end is fixed on by merging core converter
The second merging core for offering second flow channel entrance and the mouth mold regulating sleeve for being fixed on the flow passage distributor matching board right-hand member.
Further, the dividing bushing is the cylindrical ring structure being arranged concentrically with the spreader；The diversion sleeve
The outer surface of cylinder is fitted with the inner surface of the flow passage distributor matching board, and left end is fitted with the right-hand member of first merging core；Institute
The left end of second flow channel is stated for enclosed construction, the dividing bushing offers runner on the side wall in the second flow channel and leads to
Hole, the second flow channel is connected by the runner through hole with the second flow channel entrance.
Further, the circumferential cross-section of the first flow and the second flow channel accounts for flow cavity circumferential cross-section respectively
2/3rds and 1/3rd.
Further, the mouth mold left end is arranged with the mouth mold being secured by bolts on the flow passage distributor matching board
Regulation matching board.
Further, first merging core, the merging core converter and the mouth mold regulating sleeve pass through spiral shell
Bolt is fixed on the flow passage distributor matching board；Second merging core and the merging core change and turn to consolidate also by bolt between device
It is fixed.
Relative to prior art, the PVC electrician's pipe processing mold with visual window described in the invention has following excellent
Gesture：
(1) the invention is provided with first and second flow channel entry point, is respectively used to inject non-transparent part material and transparent part
Material, two kinds of materials again by flow passage distributor when, due to the special structure design of flow passage distributor, first flow and second
Road is separated, and two kinds of materials realize a certain proportion of distribution in the circumferential, and two kinds of materials can be real in first and second runner
Now stable flowing, two kinds of materials continue to flow into the gradual change runner that sectional area is tapered into, now two kinds of material phase mutual connections
Touch, due to diminishing for runner global sections product, material is squeezed, so as to ensure that two kinds of materials have good welding strong
Degree, finally by the co-extruding flow channel extrusion matched with PVC electrician's tubular construction, forms the PVC electrician with visual window and manages, this mould
Reasonable in design, can produce meet performance requirement with visual window PVC electrician pipe.
(2) first flow in the invention is divided into three runners by deflector, and guiding gutter is offered on spreader,
The material parts water conservancy diversion that guiding gutter will can be entered by first flow entrance to left and right two runners in, it is to avoid in lower runner
Material it is excessive, material is few in the runner of left and right, it is ensured that the Uniform Flow of material, it is ensured that the material energy that first flow entrance enters
Enough formation accounts for circumferential cross-section is accumulated score of three two steady flow.
Brief description of the drawings
The accompanying drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The schematic description and description made does not constitute the improper restriction to the invention for explaining the invention.
In accompanying drawing：
Fig. 1 is the structural representation of processing mold described in the invention；
Fig. 2 is the structural representation of flow passage distributor described in the invention；
Fig. 3 is the structural representation in section at the flow passage distributor A-A.
Description of reference numerals：
1- first flow entrances；2- second flow channel entrances；3- flow passage distributors；4- cores；5- mouth molds；6- co-extruding flow channels；
7- first flows；8- second flow channels；9- flow passage distributor matching boards；The merging cores of 10- first；11- merging core converters；12- second
Merging core；13- mouth mold regulating sleeves；14- mouth molds adjust matching board；31- spreaders；32- dividing bushings；33- flow distribution plates；34- leads
Stream plate；35- guiding gutters；Runner under 71-；72- left shunts road；The right runners of 73-；81- runner through holes.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the invention can
To be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score,
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction
Or imply that the device or element of meaning with specific orientation, with specific azimuth configuration and operation, therefore must not be understood that
It is the limitation to the invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately
It is described, " multiple " is meant that two or more.
, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in the description of the invention
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be two connections of element internal.For the ordinary skill in the art, can be by concrete condition understanding
State concrete meaning of the term in the invention.
Describe the invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
PVC electrician's pipe processing mold with visual window, as shown in figure 1, offering the first merging core of first flow entrance 1
10 left sides for being fixed on flow passage distributor matching board 9, the second merging core 12 for offering second flow channel entrance 2 is changed by merging core
Device 11 is fixed on the upper end of flow passage distributor matching board 9, and the right side of flow passage distributor matching board 9 is fixed with mouth mold regulating sleeve 13, four
Form the chamber of connection between person, be provided with flow passage distributor 3 and the connection of the right-hand member of flow passage distributor 3 in chamber in left-right direction
Core 4, the mouth mold 5 for being sheathed on the outside of core 4 and the mouth for being sheathed on the left end of mouth mold 5 and being fixed on flow passage distributor matching board 9
Mould adjusts matching board 14；
As shown in Figure 2,3, the dividing bushing 32 that flow passage distributor 3 includes spreader 31 and is sheathed on the outside of spreader 31,
Dividing bushing 32 is the cylindrical ring structure being arranged concentrically with spreader 31, and circumferential cutting is formed between dividing bushing 32 and spreader 31
Face is the flow cavity of annular, there is axially disposed flow distribution plate 33 in flow cavity, and flow cavity is divided into first flow 7 by flow distribution plate 33
With second flow channel 8, the circumferential cross-section of first flow 7 and second flow channel 8 accounts for 2/3rds and three of flow cavity circumferential cross-section respectively
/ mono-；Flow passage distributor 3 is horizontally disposed with, and first flow 7 is located at lower section, and outer surface and the flow passage distributor of dividing bushing 32 are matched somebody with somebody
The inner surface laminating of plate 9, left end fits with the right-hand member of the first merging core 10, the cone angle of spreader 31 towards first flow entrance 1,
First flow entrance 1 is connected with the left end of first flow 7；The left end of second flow channel 8 is enclosed construction, and dividing bushing 32 is located at the
Runner through hole 81 is offered on side wall in two runners 8, second flow channel 8 is connected by runner through hole 81 with second flow channel entrance 2；
As shown in figure 1, forming co-extruding flow channel 6 between core 4 and mouth mold 5, one section of runner in the left side of co-extruding flow channel 6 is by a left side
To the gradual change runner that right external diameter is tapered into, one section of runner on right side then matches with electrician's tubular construction；First flow 7, second
Left end of the right-hand member of runner 8 with co-extruding flow channel 6 is connected；
Preferably, as shown in Figure 2,3, two axially disposed deflectors 34, two water conservancy diversion are additionally provided with first flow 7
Plate 34 is diametrically symmetrical, and first flow 7 is divided into three runners by two deflectors 34, respectively positioned at two water conservancy diversion
Lower runner 71 between plate 34 and two the left shunt roads 72 and right runner 72 of the top of deflectors 34 are located at respectively；Spreader
31 cone angle upper side wall circumferentially offers guiding gutter 35, the two ends of guiding gutter 35 respectively with left shunt road 72 and right runner 73
Connection.
The operation principle of the invention is as follows:
This mould is provided with two flow channel entry points altogether, and first flow entrance 1 is connected with an extruder, extrudes non-transparent part
Material, second flow channel entrance 2 is connected with another extruder, extrudes transparent partial material；Enter through first flow entrance 1
The material of non-transparent part flows into first flow 7, and the material of the transparent part entered through second flow channel entrance 2 is through runner through hole 81
Second flow channel 8 is flowed into, due to the presence of flow distribution plate 33, the material in first and second runner 7,8 is not contacted, and is respectively formed at circle
2/3rds of sectional area and 1/3rd steady flow are accounted in circumferential direction, two kinds of materials pass through first and second runner 7,8 ends
Place continues to flow into the gradual change flow channel section of the co-extruding flow channel 6 that external diameter is tapered into, and now two kinds of materials contact with each other, due to stream
What road global sections were accumulated diminishes, and material is squeezed, it is ensured that two kinds of materials have good heat seal strength, by gradual change flow channel section
One section of runner on the right side of co-extruding flow channel that two kinds of materials of extrusion are matched by the structure with electrician's pipe, ultimately forms visual window
Mouth accounts for electrician's pipe that circumferential cross-section one of is accumulated score of three.
The preferred embodiment of the invention is the foregoing is only, creation is not intended to limit the invention, it is all at this
Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc. should be included in the invention
Protection domain within.
Claims (8)
1. the PVC electrician's pipe processing mold with visual window, including external mold, it is characterised in that：Is offered on the left of the external mold
One flow channel entry point (1), upper end offers second flow channel entrance (2)；The inner chamber of the external mold is provided with flow passage distributor (3) and institute
State flow passage distributor (3) and connect core (4) and the mouth mold (5) being sheathed on the outside of the core (4)；The core (4) with it is described
Co-extruding flow channel (6) is formed between mouth mold (5)；
The flow passage distributor (3) includes spreader (31) and the dividing bushing (32) being sheathed on the outside of the spreader (31),
The cone angle of the spreader (31) is towards first flow entrance (1)；Between the spreader (31) and the dividing bushing (32)
The flow cavity that circumferential cross-section is annular is formed, there is axially disposed flow distribution plate (33), the flow distribution plate in the flow cavity
(33) flow cavity is divided into the first flow (7) of lower section and the second flow channel (8) of top, first and second runner (7,
8) material inlet end connects with the first flow entrance (1) and second flow channel entrance (2) respectively, and material outlet end is together
Squeeze flow passage (6)；
2. the PVC electrician's pipe processing mold with visual window according to claim 1, it is characterised in that：The co-extruding flow channel
(6) the one section of runner in left side is the gradual change runner that external diameter is tapered into from left to right, one section of runner on right side then with electrician's tubular construction
Match.
3. the PVC electrician's pipe processing mold with visual window according to claim 2, it is characterised in that：The first flow
(7) there are two axially disposed deflectors (34) in, two deflectors (34) are diametrically symmetrical, two institutes
State deflector (34) and the first flow (7) is divided into three runners, respectively between two deflectors (34)
Lower runner (71) and left shunt road (72), right runner (73) above two deflectors (34)；Described point
The cone angle upper side wall of flow cone (31) circumferentially offers guiding gutter (35), and the two ends of the guiding gutter (35) are divided with the left side respectively
Runner (72) is connected with right runner (73).
4. the PVC electrician's pipe processing mold with visual window according to claim 1,2 or 3, it is characterised in that：The external mold
Including flow passage distributor matching board (9), it is fixed on the left of the flow passage distributor matching board (9) and offers first flow entrance (1)
The first merging core (10), offering for flow passage distributor matching board (9) upper end is fixed on by merging core converter (11)
Second merging core (12) of second flow channel entrance (2) and be fixed on flow passage distributor matching board (9) right-hand member mouth mold regulation
Sleeve (13).
5. the PVC electrician's pipe processing mold with visual window according to claim 4, it is characterised in that：The dividing bushing
(32) it is the cylindrical ring structure that is arranged concentrically with the spreader (31)；The outer surface of the dividing bushing (32) and the runner
The inner surface laminating of distributor matching board (9), left end is fitted with the right-hand member of first merging core (10)；The second flow channel (8)
Left end be enclosed construction, the dividing bushing (32) offers runner through hole on the side wall in the second flow channel (8)
(81), the second flow channel (8) is connected by the runner through hole (81) with the second flow channel entrance (2).
6. the PVC electrician's pipe processing mold with visual window according to claim 4, it is characterised in that：The first flow
And the circumferential cross-section of the second flow channel (8) accounts for 2/3rds and 1/3rd of flow cavity circumferential cross-section respectively (7).
7. the PVC electrician's pipe processing mold with visual window according to claim 4, it is characterised in that：The mouth mold (5) is left
End is arranged with the mouth mold being secured by bolts on the flow passage distributor matching board (9) and adjusts matching board (14).
8. the PVC electrician's pipe processing mold with visual window according to claim 4, it is characterised in that：First interflow
Core (10), the merging core converter (11) and the mouth mold regulating sleeve (13) are secured by bolts in the runner distribution
On device matching board (9)；Second merging core (12) is changed with the merging core and turns to be fixed also by bolt between device (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114429.7A CN106881848A (en) | 2017-02-28 | 2017-02-28 | PVC electrician's pipe processing mold with visual window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114429.7A CN106881848A (en) | 2017-02-28 | 2017-02-28 | PVC electrician's pipe processing mold with visual window |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106881848A true CN106881848A (en) | 2017-06-23 |
Family
ID=59179480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710114429.7A Pending CN106881848A (en) | 2017-02-28 | 2017-02-28 | PVC electrician's pipe processing mold with visual window |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106881848A (en) |
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Application publication date: 20170623 |