CN111204016A - Automobile instrument panel glue feeding structure - Google Patents
Automobile instrument panel glue feeding structure Download PDFInfo
- Publication number
- CN111204016A CN111204016A CN202010110629.7A CN202010110629A CN111204016A CN 111204016 A CN111204016 A CN 111204016A CN 202010110629 A CN202010110629 A CN 202010110629A CN 111204016 A CN111204016 A CN 111204016A
- Authority
- CN
- China
- Prior art keywords
- sliding block
- slider
- instrument panel
- automobile instrument
- die
- 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
- 239000003292 glue Substances 0.000 title claims abstract description 21
- 238000007493 shaping process Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
Images
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C45/2711—Gate inserts
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a glue inlet structure of an automobile instrument panel, which comprises an upper die and a lower die, wherein the lower surface of the upper die is provided with an upper die core for forming the outer side surface of a product, the upper surface of the lower die is provided with a lower die core for molding the inner side surface of a product, the upper die core and the lower die core form a cavity for molding the product when the upper die and the lower die are closed, the side surface of the lower end of the product is provided with an air outlet, the upper surface of the upper die is provided with a pouring nozzle, the pouring nozzle also comprises a first slide block used for forming the outer side surface of the air outlet and a second slide block used for forming the inner side surface of the air outlet, the first slide block is arranged in the lower die, the second slide block is positioned in the lower die core and is in sliding fit with the lower die core, the invention provides a low-cost automobile instrument panel glue inlet structure.
Description
Technical Field
The invention relates to the field of injection molds, in particular to a glue inlet structure of an automobile instrument panel.
Background
The automobile instrument panel is one of important parts of an automobile, the automobile instrument panel is formed by injection molding through an injection mold, an air outlet of an air conditioner is arranged on the instrument panel, a sliding block or a spring block mechanism is generally needed, according to the prior art, in the common design, a main nozzle is placed on the outer side of the mechanism, a long flow channel is needed to be 150-250 mm, the injection molding period of a product is long, pressure maintaining difficulty is easily caused, the appearance weld line of the product is difficult to control, a larger mold shape is needed, and the cost is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the automobile instrument panel glue inlet structure is low in cost.
The technical scheme adopted by the invention is as follows: a glue inlet structure of an automobile instrument panel comprises an upper die and a lower die, wherein an upper die core used for forming the outer side surface of a product is arranged on the lower surface of the upper die, a lower die core used for forming the inner side surface of the product is arranged on the upper surface of the lower die, a cavity used for forming the product is formed by the upper die core and the lower die core when the upper die and the lower die are assembled, an air outlet is formed in the side surface of the lower end of the product, a pouring nozzle is arranged on the upper surface of the upper die, the glue inlet structure further comprises a first sliding block used for forming the outer side surface of the air outlet and a second sliding block used for forming the inner side surface of the air outlet, the first sliding block is arranged in the lower die, the second sliding block is positioned in the lower die core and is in sliding fit with the second sliding block in the lower die core, a through hole groove is formed in the upper surface of the, the hot runner pipe is internally provided with a hot runner, the upper end of the hot runner is communicated with the sprue gate, and the lower end of the hot runner penetrates through the first sliding block and is communicated with the cavity.
After adopting the structure, compared with the prior art, the invention has the following advantages: the first sliding block is provided with a through hole groove, a sprue insert is arranged in the through hole groove, then a hot runner pipe with a hot runner is arranged in the sprue insert, the hot runner pipe is communicated with a sprue nozzle, the hot runner is designed in the middle of the first sliding block, the length of the runner is controlled within 100mm, the problems of products and molds are reduced, and the sprue insert penetrates through the sliding block, so that the strength of the first sliding block is guaranteed, and the cost is low.
Preferably, the upper surface of the lower die is provided with a groove, the first sliding block is positioned in the groove, the side surface, away from the product, of the groove is an inclined surface, and the first sliding block is matched with the inclined surface of the groove, so that the first sliding block can be separated from the air outlet to realize core pulling.
The lower surface of the lower die is provided with an oil cylinder, and a piston rod of the oil cylinder is connected to the bottom surface of the first sliding block, so that the structure is simple.
The lower mould in be equipped with the guide bar, the guide bar lower extreme stretch in the lower mould and the guide bar lower extreme be the free end, the guide bar upper end fix in first slider bottom, lead to first slider, the reliability is high.
The diameter of the lower end of the sprue insert is smaller than that of the upper end of the sprue insert, the lower end of the sprue insert is located in the first sliding block, an open slot is formed in the lower surface of the upper die, the upper end of the sprue insert is located on the upper surface of the first sliding block, the upper end of the sprue insert is clamped in the open slot, the strength of the first sliding block can be enhanced, and the reliability is high.
The minimum thickness of the gate insert is 10 mm-14 mm, so that the strength of the gate insert and the strength of the first slide block can be guaranteed, the minimum thickness is preferably 10, 12 and 14mm, and the minimum thickness is kept 10mm to guarantee the strength of the insert.
The front side and the rear side of the sprue insert are respectively provided with a convex block, and the convex blocks extrude the through hole grooves, so that the sprue insert and the through hole grooves are connected more firmly.
The side of the nearly first slider of lower mould core be equipped with the side groove, the second slider establish at the side inslot, the side of the nearly product of first slider be equipped with the arch, protruding side and second slider side joint and protruding and lower mould core between gapped, first slider lower surface and recess between also gapped, the clearance all is the die cavity that is used for the shaping product, the shaping air outlet of being convenient for.
The second slider side be equipped with "7" style of calligraphy protruding, the arch be equipped with "7" style of calligraphy groove of the protruding joint of "7", be convenient for first slider and second slider joint also be convenient for first slider and second slider separation together.
Drawings
FIG. 1 is a front cross-sectional view of a glue inlet structure of an automobile instrument panel according to the present invention;
FIG. 2 is an enlarged schematic view of A of FIG. 1;
FIG. 3 is a perspective view of a first slider core pulling mechanism of the glue feeding structure of the automobile instrument panel;
FIG. 4 is a perspective view of a second sliding block core pulling mechanism of the glue feeding structure of the automobile instrument panel.
The mold comprises an upper mold 1, an upper mold 2, a lower mold 3, an upper mold core 4, a lower mold core 5, an air outlet 6, a product 7, a first sliding block 8, a second sliding block 9, a through hole groove 10, a sprue insert 11, a heat flow pipeline 12, a heat flow passage 13, a groove 14, an oil cylinder 15, a guide rod 16, an open groove 17, a convex block 18, a side groove 19, a bulge 20, a 7-shaped bulge 21, a 7-shaped groove 22 and a sprue nozzle.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in the figure, the invention provides a glue inlet structure of an automobile instrument panel, which comprises an upper die 1 and a lower die 2, wherein an upper die core 3 for molding the outer side surface of a product 6 is arranged on the lower surface of the upper die 1, a lower die core 4 for molding the inner side surface of the product 6 is arranged on the upper surface of the lower die 2, a cavity for molding the product 6 is formed by the upper die core 3 and the lower die core 4 when the upper die 1 and the lower die 2 are combined, an air outlet 5 is arranged on the side surface of the lower end of the product 6, a pouring nozzle 22 is arranged on the upper surface of the upper die 1, the glue inlet structure further comprises a first sliding block 7 for molding the outer side surface of the air outlet 5 and a second sliding block 8 for molding the inner side surface of the air outlet 5, the first sliding block 7 is arranged in the lower die 2, the second sliding block 8 is positioned in the lower die core 4, the second sliding, the hot runner mold has the advantages that the through hole groove 9 is formed in the first sliding block 7, the sprue insert 10 is arranged in the through hole groove 9, the hot runner pipe 11 is arranged in the sprue insert 10, the upper end of the hot runner pipe 11 extends into the upper mold 1, the hot runner pipe 12 is arranged in the hot runner pipe 11, the upper end of the hot runner pipe 12 is communicated with the sprue nozzle 22, and the lower end of the hot runner pipe 12 penetrates through the first sliding block 7 to be communicated with the mold cavity.
The lower surface of the lower die 2 is provided with an oil cylinder 14, and a piston rod of the oil cylinder 14 is connected to the bottom surface of the first sliding block 7, so that the structure is simple.
The diameter of the lower end of the sprue insert 10 is smaller than that of the upper end of the sprue insert 10, the lower end of the sprue insert 10 is located in the first slide block 7, an open groove 16 is formed in the lower surface of the upper die 1, the upper end of the sprue insert 10 is located on the upper surface of the first slide block 7, the upper end of the sprue insert 10 is clamped in the open groove 16, the strength of the first slide block 7 can be enhanced, and the reliability is high.
The minimum thickness of the gate insert 10 is 10 mm-14 mm, which can ensure the strength of the gate insert and the strength of the first slide block, the minimum thickness is preferably 10, 12 and 14mm, and the minimum thickness is kept 10mm to ensure the strength of the insert.
The front side and the rear side of the gate insert 10 are respectively provided with a lug 17, and the lugs 17 extrude the through hole groove 9, so that the connection between the gate insert 10 and the through hole groove 9 is firmer.
Lower die core 4 side of nearly first slider 7 be equipped with side groove 18, second slider 8 establish in side groove 18, the side of the nearly product 6 of first slider 7 be equipped with protruding 19, protruding 19 side and the joint of second slider 8 side and protruding 19 and lower die core 4 between gapped, first slider 7 lower surface and recess 13 between also gapped, the clearance all is the die cavity that is used for shaping product 6, the shaping air outlet 5 of being convenient for.
8 sides of second slider be equipped with "7" style of calligraphy arch 20, arch 19 be equipped with "7" style of calligraphy groove 21 of the protruding 20 joint of "7" style of calligraphy, be convenient for first slider 7 and 8 joints of second slider also be convenient for first slider 7 and 8 separation of second slider together, the position of first slider 7 and 8 joints of second slider is used for shaping air outlet 5.
Specifically, the principle of the invention is that a through hole groove 9 is arranged on a first slide block 7, a gate insert 10 is arranged in the through hole groove 9, then a hot runner pipe 11 with a hot runner 12 is arranged in the gate insert 10, the hot runner pipe 11 is communicated with a gate nozzle 22, the hot runner 12 is designed in the middle of the first slide block 7, the length of the runner is controlled within 100mm, and the problems of a product 6 and a mold are reduced.
The method is characterized in that: the pouring nozzle 22 is designed in the middle of the first sliding block 7, an insert, namely a pouring gate insert 10, needs to be added, and the minimum thickness is kept at 10mm to ensure the strength of the insert; the length of the runner is controlled within 100mm, so that the problems of a product 6 and a die are reduced; a cooling channel is arranged in the first slide block 7, and the cooling of the sprue insert 10 is ensured; the gate insert 10 penetrates the first slide block 7, and the strength of the first slide block 7 is ensured.
The action process is as follows: when the mold is opened, the oil cylinder 14 is driven, a piston rod of the oil cylinder 14 drives the first sliding block 7 to be in sliding fit in the groove 13, the first sliding block 7 is in inclined plane fit with the groove 13, the first sliding block 7 is separated from the lower mold core 4, meanwhile, a 7-shaped groove 21 of the first sliding block 7 is separated from a 7-shaped bulge of the second sliding block 8, and core pulling of the outer side face of the air outlet 5 is achieved; the second sliding block 8 realizes ejection of the product 6 and core pulling of the inner side surface of the air outlet 5 through an inclined guide rod (the movement of the inclined guide rod is realized by driving an ejector plate to move by a driving cylinder, and the lower end of the inclined guide rod is fixed on the ejector plate), and the second sliding block 8 ejects a side groove 18; thirdly, the second slide block 8 is driven to reset by utilizing the inclined guide rod during die assembly, and the second slide block 8 is positioned in the side groove 18; thirdly, the oil cylinder 14 is driven, a piston rod of the oil cylinder 14 drives the first sliding block 7 to reset, the bulge 19 of the first sliding block 7 abuts against the lower mold core 4, the 7-shaped groove 21 of the first sliding block 7 is clamped with the 7-shaped bulge of the second sliding block 8, the side surface of the bulge 19 is clamped with the side surface of the second sliding block 8, a gap is reserved between the bulge 19 and the lower mold core 4, and a gap is reserved between the lower surface of the first sliding block 7 and the groove 13.
The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a motormeter dish advances glued structure, includes mould (1) and lower mould (2), last mould (1) lower surface be equipped with last mold core (3) that are used for shaping product (6) lateral surface, lower mould (2) upper surface be equipped with lower mold core (4) that are used for shaping product (6) medial surface, last mold core (3) and lower mold core (4) form the die cavity that is used for shaping product (6) when last mould (1) and lower mould (2) compound die, the side of product (6) lower extreme be equipped with air outlet (5), last mould (1) upper surface be equipped with water mouth (22), its characterized in that: it also comprises a first slide block (7) used for forming the outer side surface of the air outlet (5) and a second slide block (8) used for forming the inner side surface of the air outlet (5), the first sliding block (7) is arranged in the lower die (2), the second sliding block (8) is positioned in the lower die core (4) and the second sliding block (8) is in sliding fit in the lower die core (4), the upper surface of the first sliding block (7) is provided with a through hole groove (9), a sprue insert (10) is arranged in the through hole groove (9), a hot runner pipe (11) is arranged in the sprue insert (10), the upper end of the hot runner pipe (11) extends into the upper die (1), a hot runner (12) is arranged in the hot runner pipe (11), the upper end of the hot runner (12) is communicated with the pouring nozzle (22), the lower end of the hot runner (12) penetrates through the first sliding block (7) to be communicated with the cavity.
2. The automobile instrument panel glue inlet structure according to claim 1, characterized in that: lower mould (2) upper surface be equipped with recess (13), first slider (7) be located recess (13), recess (13) keep away from the side of product (6) for the inclined plane, first slider (7) and recess (13) inclined plane cooperation.
3. The automobile instrument panel glue inlet structure according to claim 2, characterized in that: an oil cylinder (14) is arranged on the lower surface of the lower die (2), and a piston rod of the oil cylinder (14) is connected to the bottom surface of the first sliding block (7).
4. The automobile instrument panel glue inlet structure according to claim 3, characterized in that: lower mould (2) in be equipped with guide bar (15), guide bar (15) lower extreme stretch in lower mould (2) and guide bar (15) lower extreme be the free end, guide bar (15) upper end fix in first slider (7) bottom.
5. The automobile instrument panel glue inlet structure according to claim 1, characterized in that: the diameter of the lower end of the sprue insert (10) is smaller than that of the upper end of the sprue insert (10), the lower end of the sprue insert (10) is located in the first sliding block (7), an open groove (16) is formed in the lower surface of the upper die (1), the upper end of the sprue insert (10) is located on the upper surface of the first sliding block (7), and the upper end of the sprue insert (10) is clamped in the open groove (16).
6. The automobile instrument panel glue inlet structure according to claim 1, characterized in that: the minimum thickness of the gate insert (10) is 10 mm-14 mm.
7. The automobile instrument panel glue inlet structure according to claim 1, characterized in that: the front side and the rear side of the gate insert (10) are provided with convex blocks (17).
8. The automobile instrument panel glue inlet structure according to claim 1, characterized in that: the side of the nearly first slider (7) of lower mold core (4) be equipped with side groove (18), second slider (8) establish in side groove (18), the side of the nearly product (6) of first slider (7) be equipped with arch (19), arch (19) side and second slider (8) side joint and arch (19) and lower mold core (4) between gapped, first slider (7) lower surface and recess (13) between also gapped.
9. The automobile instrument panel glue inlet structure according to claim 8, characterized in that: the side of the second sliding block (8) is provided with a 7-shaped bulge (20), and the bulge (19) is provided with a 7-shaped groove (21) which is connected with the 7-shaped bulge (20) in a clamping manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110629.7A CN111204016A (en) | 2020-02-24 | 2020-02-24 | Automobile instrument panel glue feeding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110629.7A CN111204016A (en) | 2020-02-24 | 2020-02-24 | Automobile instrument panel glue feeding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111204016A true CN111204016A (en) | 2020-05-29 |
Family
ID=70781175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010110629.7A Pending CN111204016A (en) | 2020-02-24 | 2020-02-24 | Automobile instrument panel glue feeding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111204016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114030142A (en) * | 2021-11-12 | 2022-02-11 | 和平县华毅塑胶制品有限公司 | Secondary demoulding mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202180576U (en) * | 2011-07-21 | 2012-04-04 | 延锋伟世通汽车模具有限公司 | A drawing of patterns mould for instrument board air outlet mechanism |
| CN104227977A (en) * | 2014-08-29 | 2014-12-24 | 宁波南方塑料模具有限公司 | Injection mold for feeding glue from bottom of sliding block |
| CN204183830U (en) * | 2014-10-23 | 2015-03-04 | 浙江亨达塑料模具有限公司 | The spliced combination mould emptier of Auto front grille mould |
| CN106239842A (en) * | 2016-08-19 | 2016-12-21 | 重庆长安汽车股份有限公司 | A kind of fascia injection mold |
| CN107053613A (en) * | 2017-05-15 | 2017-08-18 | 宁波神通模塑有限公司 | A kind of sliding block for secondary core pulling takes off by force holes mechanism |
| CN206796432U (en) * | 2017-03-21 | 2017-12-26 | 广东联塑科技实业有限公司 | A kind of mould structure of the product grid demoulding |
| CN208543758U (en) * | 2018-05-02 | 2019-02-26 | 台州市黄岩亿德塑模有限公司 | Car steering tube column upper shield directly pushes up embedded ejection device mechanism |
-
2020
- 2020-02-24 CN CN202010110629.7A patent/CN111204016A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202180576U (en) * | 2011-07-21 | 2012-04-04 | 延锋伟世通汽车模具有限公司 | A drawing of patterns mould for instrument board air outlet mechanism |
| CN104227977A (en) * | 2014-08-29 | 2014-12-24 | 宁波南方塑料模具有限公司 | Injection mold for feeding glue from bottom of sliding block |
| CN204183830U (en) * | 2014-10-23 | 2015-03-04 | 浙江亨达塑料模具有限公司 | The spliced combination mould emptier of Auto front grille mould |
| CN106239842A (en) * | 2016-08-19 | 2016-12-21 | 重庆长安汽车股份有限公司 | A kind of fascia injection mold |
| CN206796432U (en) * | 2017-03-21 | 2017-12-26 | 广东联塑科技实业有限公司 | A kind of mould structure of the product grid demoulding |
| CN107053613A (en) * | 2017-05-15 | 2017-08-18 | 宁波神通模塑有限公司 | A kind of sliding block for secondary core pulling takes off by force holes mechanism |
| CN208543758U (en) * | 2018-05-02 | 2019-02-26 | 台州市黄岩亿德塑模有限公司 | Car steering tube column upper shield directly pushes up embedded ejection device mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114030142A (en) * | 2021-11-12 | 2022-02-11 | 和平县华毅塑胶制品有限公司 | Secondary demoulding mechanism |
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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: 20200529 |
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| RJ01 | Rejection of invention patent application after publication |