CN111822213A - Local coating process of COSMA (chip on surface) - Google Patents
Local coating process of COSMA (chip on surface) Download PDFInfo
- Publication number
- CN111822213A CN111822213A CN202010787953.2A CN202010787953A CN111822213A CN 111822213 A CN111822213 A CN 111822213A CN 202010787953 A CN202010787953 A CN 202010787953A CN 111822213 A CN111822213 A CN 111822213A
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- China
- Prior art keywords
- spraying
- workpiece
- rod
- controlled
- central rod
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/28—Masking elements, i.e. elements defining uncoated areas on an object to be coated for defining uncoated areas that are not enclosed within coated areas or vice versa, e.g. for defining U-shaped border lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0278—Arrangement or mounting of spray heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
- B05B13/041—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
Landscapes
- Spray Control Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an automatic COSMA local coating process, which comprises the following steps: the shielding is to expose the part of the workpiece needing to be coated and shield the part not needing to be coated; mounting, namely mounting the shielding tool with the workpiece on a rotatable spraying shaft of a spraying machine; preheating, namely preheating the spraying machine, wherein the preheating temperature is controlled to be 20-40 ℃, and the time is controlled to be 10-15 min; spraying, wherein the rotating speed of the rotating shaft is controlled at 3200-3800rpm, the speed of the spray gun of the spraying machine is controlled at 1200-1800rpm, and the spraying pressure of the spray gun is controlled at 1.4-1.6bar for spraying; drying, namely drying the sprayed workpiece, wherein the drying temperature is controlled to be 100-120 ℃, and the drying time is controlled to be 15-20 min; step 6: hanging down to finish spraying. The process ensures the product quality, improves the production efficiency and improves the enterprise benefit.
Description
Technical Field
The invention relates to the technical field of automobile part coating processes, in particular to a COSMA local coating process implemented for preventing galvanic corrosion caused by contact between dissimilar metals of automobile parts.
Background
In order to improve the problem, the surface of the part needs to be locally coated, and the problem can be effectively improved by selecting COSMA coating, but the COSMA coating has high viscosity and high unit price, and the traditional soaking or hand spraying mode is adopted, so that the cost is wasted and the coating quality is difficult to control.
Disclosure of Invention
In order to overcome the problems, the invention provides a COSMA local coating process, which ensures the product quality, improves the production efficiency and improves the enterprise benefit.
The technical scheme of the invention is as follows:
the automatic COSMA local coating process is based on an automatic spraying mechanism and a workpiece local shielding mechanism, the automatic spraying mechanism comprises a workpiece self-rotating rod, the workpiece self-rotating rod is driven to rotate by a workpiece self-rotating motor, the workpiece self-rotating rod is provided with the workpiece local shielding mechanism, the local shielding mechanism comprises a central rod, a locking ring, a front cover and a rear cover, one end of the central rod is provided with a blocking part, the other end of the central rod is provided with threads, internal threads are arranged in the locking ring and can be matched and locked with the threads on the central rod, a first through hole is formed in the center of the front cover, the aperture of the first through hole is not smaller than the diameter of the central rod, a second through hole is formed in the center of the rear cover, the aperture of the second through hole is not smaller than the diameter of the central rod, the front cover and the rear cover are respectively used for covering two ends of an inner cavity of a product, the inner cavity of the product and the second perforation of the rear cover or the first perforation of the front cover sequentially penetrate through the second perforation of the rear cover, the inner cavity of the product and the first perforation of the front cover from opposite directions, one product or a plurality of products arranged according to the structure are sequentially overlapped and installed on the central rod, the product at the head end or the tail end is blocked by the blocking part at one end of the central rod, one or a plurality of products overlapped on the central rod is locked on the central rod by the locking ring at the other end, the assembled central rod is installed on the workpiece self-rotating rod and is driven by the workpiece self-rotating rod to rotate along the axial direction of the workpiece self-rotating rod, the spraying gun further comprises a spraying gun, the spraying gun is connected with a driving shaft of a spraying gun moving motor through a spraying gun spraying telescopic rod, the spraying gun moving motor drives the spraying gun to move along the left and right directions of the workpiece, the rear end of the spraying gun, the number of the spraying guns is 2, the two spraying guns are arranged on one side of the workpiece in parallel, the two spraying guns are fixedly arranged with the spraying telescopic rod of the spraying gun at intervals in front and back, and the spraying telescopic rod of the spraying gun is parallel to the rotation rod of the workpiece; the method is characterized by comprising the following steps:
step 1: the shielding is to expose the part of the workpiece needing to be coated and shield the part not needing to be coated;
step 2: mounting, namely mounting the shielding tool with the workpiece on a rotatable spraying shaft of a spraying machine;
and step 3: preheating, namely preheating the spraying machine, wherein the preheating temperature is controlled to be 20-40 ℃, and the time is controlled to be 10-15 min;
and 4, step 4: spraying, wherein the rotating speed of the rotating shaft is controlled at 3200-3800rpm, the speed of the spray gun of the spraying machine is controlled at 1200-1800rpm, and the spraying pressure of the spray gun is controlled at 1.4-1.6bar for spraying;
and 5: drying, namely drying the sprayed workpiece, wherein the drying temperature is controlled to be 100-120 ℃, and the drying time is controlled to be 15-20 min;
step 6: hanging down to finish spraying.
Furthermore, a central rod is a hollow rod body, and the central rod penetrates through the workpiece self-rotating rod.
The invention has the beneficial effects that: the invention provides an efficient and automatic process for COSMA coating which is implemented by preventing galvanic corrosion caused by contact between dissimilar metals of automobile parts, ensures the product quality, improves the production efficiency and improves the enterprise benefit, and in addition, after the product is sprayed by the process, the product is dried under normal conditions, and the corrosion resistance of the product reaches 2400H without corrosion.
Drawings
FIG. 1 is an exploded view of a workpiece local shielding mechanism of the present invention;
FIG. 2 is an effect view of the workpiece of the present invention mounted to a local shielding mechanism of the workpiece;
FIG. 3 is a top view of the automatic spray mechanism of the present invention;
FIG. 4 is a front view of the automatic spray mechanism of the present invention;
FIG. 5 is a side view of the automatic spray mechanism of the present invention;
FIG. 6 is a process flow diagram of the present invention.
Detailed Description
As shown in fig. 1-5, an automatic process for local coating of COSMA is based on an automatic spraying mechanism and a workpiece local shielding mechanism, where the automatic spraying mechanism includes a workpiece rotation rod 1, the workpiece rotation rod 1 is driven by a workpiece rotation motor 2 to rotate, the workpiece rotation rod is provided with the workpiece local shielding mechanism, the local shielding mechanism includes a central rod 3, a locking ring 4, a front cover 5 and a rear cover 6, where one end of the central rod 3 is provided with a stop 31, the other end is provided with a thread 32, the locking ring 4 is provided with an internal thread capable of locking with the thread on the central rod 3, the center of the front cover 5 is provided with a first through hole 51, the aperture of the first through hole 51 is not smaller than the diameter of the central rod 3, the center of the rear cover 6 is provided with a second through hole 61, the aperture of the second through hole 61 is not smaller than the diameter of the central rod 3, the front cover 5 and the rear cover 6 are respectively used for covering two ends of an inner cavity of a product, the central rod 3 sequentially penetrates through the first perforation 51 of the front cover 5, the inner cavity of the product and the second perforation 61 of the rear cover 6 or sequentially penetrates through the second perforation 61 of the rear cover 6, the inner cavity of the product and the first perforation 51 of the front cover 5 from opposite directions, one or more products arranged according to the structure are sequentially stacked and mounted on the central rod 3, the products at the head end or the tail end are blocked by the blocking part 31 at one end of the central rod 3, and one or more products stacked on the central rod 3 are locked on the central rod 3 by the other end through the locking ring 4.
In order to achieve better sealing effect, a first groove 52 is further arranged on the circumference of the front cover 5, and the front cover 5 is wrapped and buckled on the front end face or the rear end face of the product through the first groove 52; the circumference of the rear cover 6 is also provided with a second groove 62, and the rear cover 6 is wrapped and buckled on the rear end surface or the front end surface of the product through the second groove 62. When the bag is buckled, two sides of the first groove 52 and the second groove 62 are respectively arranged inside and outside the peripheral wall of the front inner cavity 71 and the rear inner cavity 71 of the product 7, and the inner cavities are completely sealed and wrapped.
The front cover 5 and the rear cover 6 are both made of hard plastic covers, and the hard plastic covers meet the requirement of coating recycling, and are light in weight and low in cost.
The blocking part 31 is a blocking plate arranged at one end of the central rod 3, and products at the end part superposed on the central rod can be blocked by the blocking plate, so that the products are prevented from moving to the end part.
When the product application, protecgulum 5 and back lid 6 can cover the both ends of product inner chamber, then reuse one end area fender portion 31, the threaded well core rod 3 of the other end wears the cover product, lock the product on well core rod 3 through screwing up locking ring 4 at last, can guarantee like this that the product coating can not permeate or sputter the inner chamber of product when the spraying goes, and, well core rod 3's length can design as required, can stack a plurality of products that cover in proper order on well core rod 3 and cover protecgulum 5 and back lid 6, can once only spray a plurality of products, the quality of spraying has both been guaranteed, can improve spraying efficiency again.
The central rod 3 is a hollow rod body, and the central rod 3 penetrates through the workpiece self-rotating rod 1. The central rod 3 is mounted on the workpiece self-rotating rod 1 after being assembled, and is driven by the workpiece self-rotating rod 1 to rotate along the axial direction of the workpiece self-rotating rod 1, and a baffle 101 is further arranged at the end part of the workpiece self-rotating rod 1.
The automatic spraying mechanism further comprises a spraying gun 8, the spraying gun 8 is connected with a driving shaft of a spraying gun moving motor through a spraying gun spraying telescopic rod 9, the spraying gun is driven by the spraying gun moving motor to move along the left and right directions of a workpiece, the rear end of the spraying gun is connected with an air storage tank, the front end of the spraying gun is connected with a coating tank, the number of the spraying guns is 2, the two spraying guns are arranged on one side of the workpiece in parallel, the two spraying guns are fixedly arranged with the spraying telescopic rod of the spraying gun at intervals in a front-back mode, and the spraying telescopic rod of the spraying gun is parallel; the drive shaft of the spray gun moving motor 10 of the embodiment is a telescopic shaft, the spray gun spraying telescopic rod 9 can be a drive shaft, also can be a block or a rod body arranged at the end part of the drive shaft, stretching along with the stretching of the drive shaft, the stretching and the left-right moving effects are realized, the spray gun 8 can be directly arranged at the end part of the drive shaft, also can be arranged on the block or the rod body, and is driven by the drive shaft to move left and right, the rear ends of the two spray guns 8 are connected with a same gas storage tank 11 through pipelines, the front ends are connected with a coating tank 12 through the pipelines, and after the gas storage tank or the coating tank is opened, the two. When the spray gun moving motor is started, the two spray guns simultaneously move left and right.
During operation, the central rod 3 is arranged on the workpiece self-rotating rod 1 and is connected with the workpiece self-rotating motor 2. After the pressures of the gas tank 11 and the paint tank 12 are confirmed, the workpiece rotation motor is turned on, the spray gun movement motor 10 is turned on, and the spraying is started. The two spray guns uniformly spray the coating in the process of moving back and forth, and the coating can be uniformly attached to the surface of the workpiece along with the rotation of the workpiece.
As shown in fig. 6, the process includes:
step 1: the shielding is to expose the part of the workpiece needing to be coated and shield the part not needing to be coated;
step 2: mounting, namely mounting the shielding tool with the workpiece on a rotatable spraying shaft of a spraying machine;
and step 3: preheating, namely preheating the spraying machine, wherein the preheating temperature is controlled to be 20-40 ℃, and the time is controlled to be 10-15 min;
and 4, step 4: spraying, wherein the rotating speed of the rotating shaft is controlled at 3200-3800rpm, the speed of the spray gun of the spraying machine is controlled at 1200-1800rpm, and the spraying pressure of the spray gun is controlled at 1.4-1.6bar for spraying;
and 5: drying, namely drying the sprayed workpiece, wherein the drying temperature is controlled to be 100-120 ℃, and the drying time is controlled to be 15-20 min;
step 6: hanging down to finish spraying.
By the spraying process, the spraying efficiency is improved, the production benefit is improved, and after the spraying and drying are finished, the corrosion resistance of the product reaches 2400H without corrosion.
The above embodiments only show some embodiments of the present invention, which are described in detail and specific, but not to be understood as the limitation of the scope of the present invention, it should be noted that those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and these embodiments are all within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (2)
1. The automatic COSMA local coating process is based on an automatic spraying mechanism and a workpiece local shielding mechanism, the automatic spraying mechanism comprises a workpiece self-rotating rod, the workpiece self-rotating rod is driven to rotate by a workpiece self-rotating motor, the workpiece self-rotating rod is provided with the workpiece local shielding mechanism, the local shielding mechanism comprises a central rod, a locking ring, a front cover and a rear cover, one end of the central rod is provided with a blocking part, the other end of the central rod is provided with threads, internal threads are arranged in the locking ring and can be matched and locked with the threads on the central rod, a first through hole is formed in the center of the front cover, the aperture of the first through hole is not smaller than the diameter of the central rod, a second through hole is formed in the center of the rear cover, the aperture of the second through hole is not smaller than the diameter of the central rod, the front cover and the rear cover are respectively used for covering two ends of an inner cavity of a product, the inner cavity of the product and the second perforation of the rear cover or the first perforation of the front cover sequentially penetrate through the second perforation of the rear cover, the inner cavity of the product and the first perforation of the front cover from opposite directions, one product or a plurality of products arranged according to the structure are sequentially overlapped and installed on the central rod, the product at the head end or the tail end is blocked by the blocking part at one end of the central rod, one or a plurality of products overlapped on the central rod is locked on the central rod by the locking ring at the other end, the assembled central rod is installed on the workpiece self-rotating rod and is driven by the workpiece self-rotating rod to rotate along the axial direction of the workpiece self-rotating rod, the spraying gun further comprises a spraying gun, the spraying gun is connected with a driving shaft of a spraying gun moving motor through a spraying gun spraying telescopic rod, the spraying gun moving motor drives the spraying gun to move along the left and right directions of the workpiece, the rear end of the spraying gun, the number of the spraying guns is 2, the two spraying guns are arranged on one side of the workpiece in parallel, the two spraying guns are fixedly arranged with the spraying telescopic rod of the spraying gun at intervals in front and back, and the spraying telescopic rod of the spraying gun is parallel to the rotation rod of the workpiece; the method is characterized by comprising the following steps:
step 1: the shielding is to expose the part of the workpiece needing to be coated and shield the part not needing to be coated;
step 2: mounting, namely mounting the shielding tool with the workpiece on a rotatable spraying shaft of a spraying machine;
and step 3: preheating, namely preheating the spraying machine, wherein the preheating temperature is controlled to be 20-40 ℃, and the time is controlled to be 10-15 min;
and 4, step 4: spraying, wherein the rotating speed of the rotating shaft is controlled at 3200-3800rpm, the speed of the spray gun of the spraying machine is controlled at 1200-1800rpm, and the spraying pressure of the spray gun is controlled at 1.4-1.6bar for spraying;
and 5: drying, namely drying the sprayed workpiece, wherein the drying temperature is controlled to be 100-120 ℃, and the drying time is controlled to be 15-20 min;
step 6: hanging down to finish spraying.
2. The automated process for partial coating of COSMA according to claim 1, wherein: the central rod is a hollow rod body, and the central rod penetrates through the workpiece self-rotating rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010787953.2A CN111822213A (en) | 2020-08-07 | 2020-08-07 | Local coating process of COSMA (chip on surface) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010787953.2A CN111822213A (en) | 2020-08-07 | 2020-08-07 | Local coating process of COSMA (chip on surface) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111822213A true CN111822213A (en) | 2020-10-27 |
Family
ID=72920884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010787953.2A Pending CN111822213A (en) | 2020-08-07 | 2020-08-07 | Local coating process of COSMA (chip on surface) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111822213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116080095A (en) * | 2023-01-30 | 2023-05-09 | 浙江久石工研建材科技有限公司 | Manufacturing process of rammed-soil-imitating flexible patch stone |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537053A (en) * | 2015-12-15 | 2016-05-04 | 江苏金风科技有限公司 | Brushing device |
| CN106423775A (en) * | 2016-08-31 | 2017-02-22 | 河南航天精工制造有限公司 | Hollow workpiece outer surface partial coating method and tool |
| KR20180040049A (en) * | 2016-10-11 | 2018-04-19 | 박종원 | Coating Apparatus for Screw of Vacuum Pump |
| CN111097624A (en) * | 2018-10-29 | 2020-05-05 | 十堰隽业贸易有限公司 | Building steel processing equipment |
| CN111250301A (en) * | 2020-03-13 | 2020-06-09 | 浙江智菱科技有限公司 | Roller glue spraying device |
| CN111250375A (en) * | 2020-02-27 | 2020-06-09 | 中国铁建重工集团股份有限公司 | Water-based paint coating process for thick steel plate |
-
2020
- 2020-08-07 CN CN202010787953.2A patent/CN111822213A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537053A (en) * | 2015-12-15 | 2016-05-04 | 江苏金风科技有限公司 | Brushing device |
| CN106423775A (en) * | 2016-08-31 | 2017-02-22 | 河南航天精工制造有限公司 | Hollow workpiece outer surface partial coating method and tool |
| KR20180040049A (en) * | 2016-10-11 | 2018-04-19 | 박종원 | Coating Apparatus for Screw of Vacuum Pump |
| CN111097624A (en) * | 2018-10-29 | 2020-05-05 | 十堰隽业贸易有限公司 | Building steel processing equipment |
| CN111250375A (en) * | 2020-02-27 | 2020-06-09 | 中国铁建重工集团股份有限公司 | Water-based paint coating process for thick steel plate |
| CN111250301A (en) * | 2020-03-13 | 2020-06-09 | 浙江智菱科技有限公司 | Roller glue spraying device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116080095A (en) * | 2023-01-30 | 2023-05-09 | 浙江久石工研建材科技有限公司 | Manufacturing process of rammed-soil-imitating flexible patch stone |
| CN116080095B (en) * | 2023-01-30 | 2023-09-19 | 浙江久石工研建材科技有限公司 | Manufacturing process of rammed-soil-imitating flexible patch stone |
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Application publication date: 20201027 |
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| RJ01 | Rejection of invention patent application after publication |