CN106985367A - A kind of mould for being used to produce bottle barrel - Google Patents
A kind of mould for being used to produce bottle barrel Download PDFInfo
- Publication number
- CN106985367A CN106985367A CN201710151398.2A CN201710151398A CN106985367A CN 106985367 A CN106985367 A CN 106985367A CN 201710151398 A CN201710151398 A CN 201710151398A CN 106985367 A CN106985367 A CN 106985367A
- Authority
- CN
- China
- Prior art keywords
- mould
- submodule
- arrangement plane
- main
- main 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.)
- Pending
Links
- 239000000110 cooling liquid Substances 0.000 claims abstract description 12
- 239000002826 coolant Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000008439 repair process Effects 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
- B29C2049/4825—Moulds with incorporated heating or cooling means for cooling moulds or mould parts
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C2049/4856—Mounting, exchanging or centering moulds or parts thereof
- B29C2049/4858—Exchanging mould parts, e.g. for changing the mould size or geometry for making different products in the same mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of mould for reducing the Mold Making cost and maintenance cost of Ping Tong manufacturing enterprises.Including left mould and right mould；Left mould includes left main mould and some left submodules；Right mould includes right main mould and some right submodules；At least one left mould arrangement plane is formed with left main mould；Left submodule is provided with and left mould arrangement plane can fit matches face；Left submodule is arranged and is fixed in left mould arrangement plane, is close to mutually between left submodule；At least one right mould arrangement plane is formed with right main mould；Right submodule is provided with and right mould arrangement plane can fit matches face；Right submodule is arranged and is fixed in right mould arrangement plane, is close to mutually between right submodule；Cooling liquid flowing channel is provided with inside or outside left main mould；Cooling liquid flowing channel also is provided with inside or outside right main mould.The mould of the present invention has advantages below：The non-cutting time that the mould input cost of Ping Tong manufacturing enterprises can be greatly reduced, repairs a die and change the mold substantially shortens.
Description
Technical field
Bottle is produced with blowing process in mould the present invention relates to a kind of mould for being used to produce bottle barrel, more particularly to one kind
The mould of barrel.
Background technology
Existing bucket used for canned water, hereinafter referred to as bucket, are produced by blowing process in mould.Its production substantially
Process is as follows：The expects pipe of molten condition is extruded from discharging opening, expects pipe grows from up to down, then left mould and right mould matched moulds, left mould
With the inner chamber for after right mould matched moulds inside it being predetermined shape, expects pipe is clipped in the middle, is hereafter in discharging opening by left mould and right mould
The blow needle of centre to material treacheal gas insufflation, allow expects pipe expand and mould of finally fitting inner chamber, left mould and right mould are with liquid cold passage
Mould, will be cooled after expects pipe laminating left mould and right mould and shape.Hereafter left mould and right mould separation, can remove bucket half into
Product.
In the prior art, the bucket of a profile will need 1 left mould and 1 right mould.Profile major part identical water
Bucket, its corresponding left mould and right mould are also intended to what is made respectively.This results in cost input of the bucket manufacturing enterprise on mould
It is very big.
Therefore the structure of the mould to existing production bottle barrel is needed to improve.
The content of the invention
The present invention provides a kind of mould for being used to produce bottle barrel, it is therefore an objective to reduce the Mold Making of Ping Tong manufacturing enterprises
Cost and maintenance cost.
Using following technical scheme：
A kind of mould for being used to produce bottle barrel, including left mould and right mould；Especially, the left mould include left main mould and
Some left submodules；The right mould includes right main mould and some right submodules；At least one is formed with the left main mould to arrange for left submodule
The semi-cylindrical of row, referred to as left mould arrangement plane；Left submodule is provided with and the left mould arrangement plane can fit matches face；The left side
Submodule is arranged and is fixed in left mould arrangement plane, is close to mutually between left submodule；At least one is formed with the right main mould for right
The semi-cylindrical of submodule arrangement, referred to as right mould arrangement plane；Right submodule is provided with and the right mould arrangement plane can fit matches face；
Right submodule is arranged and is fixed in right mould arrangement plane, is close to mutually between right submodule；Set inside or outside the left main mould
There is cooling liquid flowing channel；Cooling liquid flowing channel also is provided with inside or outside the right main mould.
The present invention operation principle be：Structure that can be disconnected from each other by main mould and submodule, realizes a kind of modular mould
Tool, has many advantages, such as compared to existing monolithic mold.Now Ping Tong manufacturing enterprises only need to configure the main mould of negligible amounts, and
For the corresponding submodule of bottle bucket configuration of different profiles, because the cost of submodule is lower, this can significantly save the purchase of mould
Expense.And some can be shared the submodule under many occasions between the bottle bucket of different profiles involved by it, and this is just
Mean further save the buying expenses of mould.Furthermore, when certain submodule needs to repair a die, replaced with the standby submodule of identical
Change, and it is substantially easily quick in the work for changing existing monolithic mold to change the work of submodule, this both mitigated
The working strength of workman, reduces the time shut down and stopped production again, there is to non-cutting time very big shortening effect.
The left submodule can include：Left ring mould, left shoulder mould, left lace mould, left big template die and left bottom mould；It is described
Right submodule can include：Right ring mould, right shoulder mould, right lace mould, right big template die and right bottom mould.
The left ring mould, left shoulder mould, left bottom mould, right ring mould, right shoulder mould, right bottom mould are preferably formed with respectively
From block the edge of a knife.
The left ring mould, left bottom mould, right ring mould, some sub-materials pressure mouths are preferably also formed on right bottom mould.It is logical
Such technical scheme is crossed, the clout position that expects pipe is in mould will be divided into some fritters being connected together, so
It is easy to that subsequently these clout positions are crushed and re-used.
The left submodule is preferred to use following structure and is fixed in left mould arrangement plane：By tightening the briquetting in left main mould
Push down the two ends of left submodule；The right submodule is preferred to use following structure and is fixed in right mould arrangement plane：By tightening in right master
Briquetting on mould pushes down the two ends of right submodule.
The left submodule can also be fixed in left mould arrangement plane using following structure：Left submodule is directly tightened with screw
In left main mould；The right submodule can also be fixed in right mould arrangement plane using following structure：It is with screw that right submodule is direct
Tighten in right main mould.
In addition, being preferably also provided with making left submodule and right submodule produce micro-strain for correspondence in left main mould and right main mould
Adjustment screw, the adjustment screw aligns left submodule, the vicinity of the end of right submodule., can be with by such technical scheme
The matched moulds for solving to occur after change or repair a die certain left submodule, right submodule stitches the problem of dislocation is excessive.
In the case of being provided with cooling liquid flowing channel in the inside of left main mould, the cooling liquid flowing channel is preferred to use following structure system
Into：Dorsad the position of the left mould arrangement plane is formed with serpentine channels in left main mould, is mounted with the serpentine channels
Left cover；The bottom of the serpentine channels is constant to the distance between the left mould arrangement plane；The serpentine channels of the left main mould
One communicated with coolant input interface, other end is communicated with coolant output interface., can be with by such technical scheme
Increase the amount of liquid storage in left main mould, so that the temperature uniformity and stability of left main mould are improved, so as to improve the transparent of product
Degree.The inside of right main mould be provided with cooling liquid flowing channel in the case of, can use with left main mould identical structure, i.e.,：It is described cold
But liquid runner is made of following structure：Dorsad the position of the right mould arrangement plane is formed with serpentine channels in right main mould, in institute
State and right cover plate is mounted with serpentine channels；The bottom of the serpentine channels is to the distance between right mould arrangement plane perseverance
It is fixed；One of the serpentine channels of the right main mould is communicated with coolant input interface, and other end is communicated with coolant output interface.
A kind of mould for being used to produce bottle barrel of the present invention has advantages below：The mould input of Ping Tong manufacturing enterprises
The non-cutting time that cost can be greatly reduced, repairs a die and change the mold substantially shortens.
Brief description of the drawings：
Fig. 1 is the structural representation of embodiment；
Fig. 2 is the configuration schematic diagram of left mould in embodiment；
Fig. 3 is the structural representation one (removing left cover) of left mould in embodiment；
Fig. 4 is the structural representation two (removing left cover) of left mould in embodiment；
Fig. 5 is Fig. 4 A-A to cross section structure diagram.
Description of reference numerals：The left main moulds of 1-；The left submodules of 2-；11- the first left mould arrangement planes；12- the second left mould arrangement planes；
The left mould arrangement planes of 13- the 3rd；14- briquettings；15- adjusts screw；16- serpentine channels；17- left covers；The input of 18- coolants connects
Mouthful；19- coolant output interfaces；The left Bottle-mouth dies of 20-；The left ring moulds of 21-；The left shoulder moulds of 22-；The left lace moulds of 23- first；24-
First left big template die；The left lace moulds of 25- second；The left big template dies of 26- second；The left bottom moulds of 27-；30- blocks the edge of a knife；31- sub-materials
Press mouth.
Embodiment
Present invention is described further with reference to embodiment.
As shown in Figure 1 and Figure 2, a kind of mould for being used to produce bottle barrel of the present embodiment includes：Left mould and right mould.Its
In, left mould includes left main mould 1 and left submodule 2, and right mould includes right main mould and right submodule.The right main mould of the present embodiment and right submodule
Structure is consistent substantially with the correspondence of left main mould 1 and left submodule 2, and the structure only to left main mould 1 and left submodule 2 is illustrated below,
Structure to right main mould and right submodule is repeated no more.
As shown in Fig. 2 being formed with the semi-cylindrical of the left submodule arrangement of 3 confessions, referred to as first in the left main mould 1 of the present embodiment
Left mould arrangement plane 11, the second left mould arrangement plane 12 and the 3rd left mould arrangement plane 13.And left submodule 2 includes：Left ring mould 21, a left side
Shoulder mould 22, the first left left big template die 24 of lace mould 23, first, the second left left big template die 26 of lace mould 25, second and left bottom of bottle
Mould 27.Left Bottle-mouth die 20 is also equipped with wherein left ring mould 21.Left ring mould 21 is provided with and the first left mould arrangement plane 11 and second
The matching face that the correspondence of left mould arrangement plane 12 fits；Left shoulder mould 22, the first left left big template die 24, second of lace mould 23, first
Left lace mould 25, second left big template die 26 and left bottom mould 27 are provided with and the 3rd left mould arrangement plane 13 can fit matches face.
Left ring mould 21 is arranged in the first left mould arrangement plane 11 and the second left mould arrangement plane 12；Left shoulder mould 22, the first left lace mould
23rd, the first left big template die 24, the second left lace mould 25, second left big template die 26 and left bottom mould 27 are arranged in order in the 3rd left mould
In arrangement plane 13.Left ring mould 21, left shoulder mould 22, the first left lace mould 23, first left big template die 24, the second left lace mould
25th, the second left big template die 26 and left bottom mould 27 it is adjacent both be close to mutually.In the present embodiment, left shoulder mould 22, the first left flower
The left big template die 24 of side mould 23, first, the second left left big template die 26 of lace mould 25, second are each tightened the pressure in left main mould 1
Block 14 pushes down two ends, is fixed on this in left main mould 1.And left ring mould 21 and left bottom mould 27 are directly tightened with screw
Left main mould 1.
In the present embodiment, as shown in Fig. 2 some adjustment screws 15 are additionally provided with left main mould 1, these adjustment correspondences of screw 15
Ground aligns left shoulder mould 22, the first left left big template die 24 of lace mould 23, first, the second left left big template die 26 of lace mould 25, second
The vicinity of the end of these left submodules.By precession or screw out these adjustment screw 15, it is possible to solve left submodule and right submodule
The problem of matched moulds seam dislocation is excessive.
In the present embodiment, as shown in Fig. 2 left ring mould 21, left shoulder mould 22, left bottom mould 27 are each formed with respective section
Breaking mouthful 30.And some sub-material pressure mouths 31 are also formed with left ring mould 21 and left bottom mould 27.
In the present embodiment, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, the inside of left main mould 1 be provided with cooling liquid flowing channel, use with
Lower structure is made：Dorsad the position of the 3rd left mould arrangement plane 13 is formed with serpentine channels 16 in left main mould 1, in serpentine channels 16
It is mounted with left cover 17.The bottom of the serpentine channels 16 of the present embodiment is to the distance between the 3rd left mould arrangement plane 13 perseverance
It is fixed.One of the serpentine channels 16 of left main mould 1 communicates with coolant input interface 18, other end and the phase of coolant output interface 19
It is logical.
Using the mould of the present embodiment, the mould purchase fee that writing can be saved for Ping Tong manufacturing enterprises is used.
What this specification was enumerated is only the better embodiment of the present invention, all institutes under the operation principle and thinking of the present invention
The equivalent technologies conversion done, is accordingly to be regarded as protection scope of the present invention.
Claims (10)
1. a kind of mould for being used to produce bottle barrel, including left mould；It is characterized in that：The left mould includes left main mould and some left sides
Submodule；The semi-cylindrical that at least one supplies left submodule to arrange, referred to as left mould arrangement plane are formed with the left main mould；Left submodule is set
Have and the left mould arrangement plane can fit matches face；The left submodule is arranged and is fixed in left mould arrangement plane, left submodule
Between be close to mutually；Cooling liquid flowing channel is provided with inside or outside the left main mould.
2. a kind of mould for being used to produce bottle barrel as claimed in claim 1, it is characterized in that：The left submodule includes：It is left
Ring mould, left shoulder mould, left lace mould, left big template die and left bottom mould.
3. a kind of mould for being used to produce bottle barrel as claimed in claim 2, it is characterized in that：The left ring mould, left bottle
Shoulder mould, left bottom mould, which are formed with, respective blocks the edge of a knife.
4. a kind of mould for being used to produce bottle barrel as claimed in claim 2, it is characterized in that：The left ring mould, left bottle
Bed die is also formed with some sub-material pressure mouths.
5. a kind of mould for being used to produce bottle barrel as claimed in claim 1, it is characterized in that：The left submodule is using following
Structure is fixed in left mould arrangement plane：The two ends of left submodule are pushed down by tightening the briquetting in left main mould.
6. a kind of mould for being used to produce bottle barrel as claimed in claim 1, it is characterized in that：The left submodule is using following
Structure is fixed in left mould arrangement plane：Left submodule is directly tightened in left main mould with screw.
7. a kind of mould for being used to produce bottle barrel as claimed in claim 1, it is characterized in that：Use is additionally provided with left main mould
The adjustment screw of left submodule generation micro-strain is made in correspondence, the adjustment screw aligns the vicinity of the end of left submodule.
8. a kind of mould for being used to produce bottle barrel as claimed in claim 1, it is characterized in that：It is provided with the inside of left main mould
Cooling liquid flowing channel, the cooling liquid flowing channel is made of following structure：The dorsad position of the left mould arrangement plane in left main mould
Serpentine channels are formed with, left cover is mounted with the serpentine channels；The bottom of the serpentine channels to the left mould is arranged
The distance between row face is constant；One of the serpentine channels of the left main mould communicates with coolant input interface, other end with it is cold
But liquid output interface is communicated.
9. a kind of mould for being used to produce bottle barrel, including right mould；It is characterized in that：The right mould includes right main mould and some right sides
Submodule；The semi-cylindrical that at least one supplies right submodule to arrange, referred to as right mould arrangement plane are formed with the right main mould；Right submodule is set
Have and the right mould arrangement plane can fit matches face；The right submodule is arranged and is fixed in right mould arrangement plane, right submodule
Between be close to mutually；Cooling liquid flowing channel is provided with inside or outside the right main mould.
10. a kind of mould for being used to produce bottle barrel as claimed in claim 9, it is characterized in that：The right submodule use with
Lower structure is fixed in right mould arrangement plane：The two ends of right submodule are pushed down by tightening the briquetting in right main mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710151398.2A CN106985367A (en) | 2017-03-20 | 2017-03-20 | A kind of mould for being used to produce bottle barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710151398.2A CN106985367A (en) | 2017-03-20 | 2017-03-20 | A kind of mould for being used to produce bottle barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106985367A true CN106985367A (en) | 2017-07-28 |
Family
ID=59411669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710151398.2A Pending CN106985367A (en) | 2017-03-20 | 2017-03-20 | A kind of mould for being used to produce bottle barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106985367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509527A (en) * | 2019-09-05 | 2019-11-29 | 吴振飞 | A kind of blow molded plastic molding die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840350A (en) * | 1994-09-27 | 1998-11-24 | Brit Corporation | Modified plastic bottle injection blow-molding apparatus and method |
| CN201235603Y (en) * | 2007-08-30 | 2009-05-13 | 广东星联精密机械有限公司 | Single-mould body multi-bottle type blow molding mould easy to replace bottle shape structure |
| CN201907198U (en) * | 2010-08-25 | 2011-07-27 | 成都协展模具制造有限公司 | Novel blow molding mould |
| CN207156433U (en) * | 2017-03-20 | 2018-03-30 | 佛山市添丰模具有限公司 | A kind of mould for being used to produce bottle barrel |
-
2017
- 2017-03-20 CN CN201710151398.2A patent/CN106985367A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840350A (en) * | 1994-09-27 | 1998-11-24 | Brit Corporation | Modified plastic bottle injection blow-molding apparatus and method |
| CN201235603Y (en) * | 2007-08-30 | 2009-05-13 | 广东星联精密机械有限公司 | Single-mould body multi-bottle type blow molding mould easy to replace bottle shape structure |
| CN201907198U (en) * | 2010-08-25 | 2011-07-27 | 成都协展模具制造有限公司 | Novel blow molding mould |
| CN207156433U (en) * | 2017-03-20 | 2018-03-30 | 佛山市添丰模具有限公司 | A kind of mould for being used to produce bottle barrel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509527A (en) * | 2019-09-05 | 2019-11-29 | 吴振飞 | A kind of blow molded plastic molding die |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170728 |