CN115091789A - External fixed hollow cotton die and forming method - Google Patents
External fixed hollow cotton die and forming method Download PDFInfo
- Publication number
- CN115091789A CN115091789A CN202210866349.8A CN202210866349A CN115091789A CN 115091789 A CN115091789 A CN 115091789A CN 202210866349 A CN202210866349 A CN 202210866349A CN 115091789 A CN115091789 A CN 115091789A
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- die
- sleeve
- axis
- sleeve body
- fixed hollow
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000000903 blocking effect Effects 0.000 claims description 20
- 238000007493 shaping process Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000012943 hotmelt Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 19
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002304 perfume Substances 0.000 description 2
- 241001417527 Pempheridae Species 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003571 electronic cigarette Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
- B29C33/304—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting centering cores
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3828—Moulds made of at least two different materials having different thermal conductivities
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Moulding By Coating Moulds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an external fixed hollow cotton die and a forming method, wherein the die comprises a die body and a sleeve assembly, the sleeve assembly comprises a sleeve body and a central rod, the axis of the sleeve body is coincided with the axis of the die body, a fixed flange is arranged on the sleeve body, the central rod comprises a forming rod and a connecting flange connected to the side surface of the forming rod, the connecting flange is detachably connected with the fixed flange, and the axis of the central rod is coincided with the axis of a forming channel of the die body; according to the invention, the sleeve body with the fixed flange is arranged on the die body, and the connecting flange is arranged on the side surface of the forming rod, so that the forming rod can be directly fixed on the die body under the connecting action of the fixed flange and the connecting flange, the axis of the forming rod is kept to be coincided with the axis of the die body, and the problem that the coincidence degree of the axis of the forming rod and the axis of the die body is low when the forming rod is fixed on other process parts outside the die body is avoided.
Description
Technical Field
The invention belongs to the technical field of fiber forming equipment, and particularly relates to an external fixed type hollow cotton mold and a forming method.
Background
The fiber rod is commonly called as perfume core and oil storage integrated cotton, and the filtering cotton core is a fiber bundle formed by combining a plurality of fine porous fiber silk threads. The fiber rod is mainly used for naturally and slowly releasing air purification and products needing water diversion and filtering functions, and is suitable for industries such as daily use (products such as an air freshening fragrance device and an automobile perfume seat), electronics (products such as a USB micro humidifier, an electronic cigarette atomizer and a microcomputer sweeper), medical use (products such as a laboratory pipette, an oxygen generator and a humidification bottle), and the like;
currently, the forming process of fibre tows, the way in which the central axis passes outside the forming tunnel, results in a reduced accuracy of the registration of the mandrel with the axis of the forming tunnel, such as in the die, die assembly, apparatus and method for forming a rod of fibre material of application number 201880034151.5, the die or die assembly comprising a mandrel positioned in the path of the fibre to form a fibre in a tubular configuration around the mandrel as the fibre tow advances over the mandrel, the mandrel being positionable in a tunnel in the die such that as the tow advances over the mandrel it forms a tubular configuration, the mandrel being mounted in a mandrel assembly adjacent the die and projecting therefrom into a tunnel in the die, and the mandrel assembly being configured to guide the fibre tow onto the mandrel and into a tunnel in the die assembly which, when incorporated in the manufacturing apparatus for forming the rod, the mandrel assembly may be positioned in the path of the fiber bundle upstream of the die assembly, and the mandrel may protrude through the die assembly into the passage from downstream;
based on the above prior art, applicants have found that it is desirable to provide a collodion die in which the mandrel is secured directly to the forming tunnel.
Disclosure of Invention
The invention aims to provide an external fixed hollow cotton mold with high axial overlap ratio and stable structure and a molding method aiming at the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an external fixed type hollow core cotton die which comprises a die body and a sleeve assembly arranged on the die body, wherein the sleeve assembly comprises a sleeve body and a central rod fixed on the sleeve body, the sleeve body is detachably connected with the die body, the axis of the sleeve body is coincided with the axis of the die body, a fixed flange is arranged on the sleeve body, the central rod comprises a forming rod and a connecting flange connected to the side surface of the forming rod, the connecting flange is detachably connected with the fixed flange, and the axis of the central rod is coincided with the axis of a forming channel of the die body.
Preferably, the die body is a hot melt tow pipeline, and the die body is made of iron, stainless steel or copper.
Preferably, the inner wall of the sleeve body is tightly attached and connected with the outer wall of the die body.
Preferably, a plurality of connecting flanges are connected to the forming rod around the axial direction of the forming rod.
Preferably, a plurality of the connection flange all is connected with connecting portion, connecting portion with the shaping stick can be dismantled and be connected.
Preferably, the sleeve body comprises an outer layer body and an inner layer body, a plurality of fixing columns arranged along the circumferential direction are arranged on the inner wall of the outer layer body, the inner layer body is connected between every two adjacent fixing columns, the outermost side of the inner layer body protrudes out of the non-connecting end of each fixing column, a closed cavity is formed between the inner layer body and the outer layer body, negative thermal expansion materials are filled in the closed cavity, and the inner layer body is made of elastic materials.
Preferably, a pressure sensor is arranged on the inner wall of the outer layer body, and when a detected pressure value detected by the pressure sensor is smaller than a pressure threshold value, an alarm sends out a rotation risk alarm of the sleeve body.
Preferably, the die body is provided with blocking rings, and the blocking rings are positioned on two sides of the sleeve body; fastening screws are uniformly distributed on the circumferential direction of the blocking ring, and the blocking ring is tightly attached to the outer wall of the die body through the fastening screws.
Preferably, circumferentially adjacent said fastening screws are spaced 90 °, 120 ° or 180 °.
The forming method of the external fixed hollow cotton mold comprises the following steps:
fixing one of the blocking rings on the die body through a fastening screw, sleeving the sleeve body on the die body, and fixing the other blocking ring on the die body through the fastening screw;
a negative thermal expansion material is filled in the closed cavity of the sleeve body, and the non-connecting end of the fixing column protrudes out of the outermost side of the inner layer body; the fixed flange of the sleeve body is connected with the connecting flange of the central rod, and the axis of the central rod is ensured to be coincident with the axis of the forming channel of the die body;
the silk bundle passes through mould body shaping passageway to accomplish silk bundle hot melt shaping work, when the detection pressure value that is located pressure sensor on the outer body inner wall and detects was less than the pressure threshold value, the siren sent the sleeve body has rotatory risk alarm, stop work, overhauls.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the sleeve body with the fixed flange is arranged on the die body, and the connecting flange is arranged on the side surface of the forming rod, so that the forming rod can be directly fixed on the die body under the connecting action of the fixed flange and the connecting flange, the axis of the forming rod is kept to be coincided with the axis of the die body, the problem that the coincidence degree of the axis of the forming rod and the axis of the die body is low when the forming rod is fixed on other process parts outside the die body is avoided, and the problem that the forming rod shakes when the other process parts are vibrated by external force is also avoided;
secondly, the sleeve body is composed of an outer layer body and an inner layer body, and a closed cavity filled with a negative thermal expansion material is formed between the inner layer body and the outer layer body, so that when the mold body is heated to generate a thermal expansion phenomenon, the outer layer body keeps the position and the negative thermal expansion material shrinks under heating, the inner layer body shrinks, and the problem that the coaxiality is reduced due to the damage of the mold body to the sleeve body is solved; the inner pressure of the closed cavity is increased, when the pressure is overlarge, the inner layer body is in a critical state to be compressed into the closed cavity, at the moment, the friction force between the sleeve body and the die body is reduced, when fiber tows slide in the forming channel, lateral extrusion force borne by the forming rod can generate a phenomenon that the forming rod drives the sleeve body to rotate on the die body, the rotatable forming rod can generate disturbance to the fiber tows in the forming process, and the fiber tows are not beneficial to forming of the fiber tows.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of an external fixed hollow cotton mold of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of the mold body of FIG. 1 removed;
FIG. 4 is a schematic structural view of the sleeve body;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a schematic view of the inner layer body of FIG. 4 with the inner layer removed;
FIG. 7 is a cross-sectional view of FIG. 6;
the die comprises a die body 1, a sleeve component 2, a sleeve body 3, a fixed flange 4, a forming rod 5, a connecting flange 6, a connecting part 7, an outer layer body 8, an inner layer body 9, a fixed column 10, a closed cavity 11, a pressure sensor 12 and a blocking ring 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The present invention will be described in more detail with reference to the accompanying drawings and detailed description thereof, so that the objects, features and advantages thereof will be more clearly understood.
As shown in fig. 1 to 7, the invention provides an external fixed hollow cotton die, which comprises a die body 1, wherein the die body 1 is a hot melt tow pipeline, the die body 1 is made of iron, stainless steel or copper, preferably copper, a sleeve assembly 2 for fixing a center rod is arranged on the die body 1, the sleeve assembly 2 comprises a sleeve body 3, the sleeve body 3 and the die body 1 are coaxially arranged, preferably, the inner wall of the sleeve body 3 is tightly attached and connected with the outer wall of the die body 1, so as to ensure that the axes of the sleeve body 3 and the die body 1 are coincident; the sleeve body 3 is detachably connected with the die body 1 in various detachable connection modes, for example, the sleeve body is directly and fixedly connected with the die body 1 through a fastening screw, or the sleeve body can be connected in other fixed modes, for example, a blocking ring 13 is arranged on the die body 1, and the blocking ring 13 is positioned on two sides of the sleeve body 3; fastening screws are uniformly distributed on the circumferential direction of the blocking ring 13, the blocking ring 13 is tightly attached to the outer wall of the die body 1 through the fastening screws, and the blocking ring 13 is used for clamping two axial sides of the sleeve body 3;
be fixed with a centre rod on sleeve body 3, the centre rod includes shaping stick 5 and connects the connection edge of a wing 6 in shaping stick 5 side, shaping stick 5 stretches into in the shaping passageway of mould body 1, both axis coincidence, the quantity of connecting edge of a wing 6 can be one, can be a plurality of, when being a plurality of, a plurality of connection edges of a wing 6 are arranged into the axial of shaping stick 5, connect edge of a wing 6 and fixed edge of a wing 4 can dismantle the connection, the releasable connection mode is manifold, this connected mode is prior art, do not do this and describe here repeatedly, for example bolted connection.
In a specific embodiment, the connecting flanges 6 are connected to the connecting portion 7, preferably in a fixed connection, the connecting flanges 6 and the connecting portion 7 are in an L-shaped connection structure, and the connecting portion 7 is detachably connected to the forming rod 5, for example, by screwing.
As a specific implementation mode, the sleeve body 3 comprises an outer layer body 8 and an inner layer body 9, wherein a plurality of fixing columns 10 arranged along the circumferential direction are arranged on the inner wall of the outer layer body 8, the inner layer body 9 is connected between adjacent fixing columns 10, the outermost side of the inner layer body 9 protrudes out of the non-connecting end of each fixing column 10, a closed cavity 11 is formed between the inner layer body 9 and the outer layer body 8, negative thermal expansion materials are filled in the closed cavity 11, and the inner layer body 9 is made of elastic materials; namely, the sleeve body 3 is composed of an outer layer body 8 and an inner layer body 9, and a closed cavity 11 filled with a negative thermal expansion material is formed between the inner layer body 9 and the outer layer body 8, so that when the mold body 1 is heated and generates a thermal expansion phenomenon, the outer layer body 8 keeps the position still, the negative thermal expansion material is heated and contracted, and the inner layer body 9 is contracted, so that the problem of reduced coaxiality caused by damage of the mold body 1 to the sleeve body 3 is solved; pressure in the closed cavity 11 is increased, when the pressure is too high, the inner layer body 9 is in a critical state to be compressed into the closed cavity 11, friction between the sleeve body 3 and the die body 1 is reduced, when fiber tows slide in a forming channel, lateral extrusion force applied to the forming rod 5 can generate a phenomenon that the forming rod 5 drives the sleeve body 3 to rotate on the die body 1, the rotatable forming rod 5 can generate disturbance to the fiber tows in the forming process, and the forming of the fiber tows is not facilitated.
In a specific embodiment, the circumferentially adjacent fastening screws of the invention are spaced apart by 90 °, 120 ° or 180 °, preferably 180 °.
The forming method of the external fixed hollow cotton mold comprises the following steps:
fixing one of the blocking rings 13 on the die body 1 through a fastening screw, sleeving the sleeve body 3 on the die body 1, and fixing the other blocking ring 13 on the die body 1 through the fastening screw;
a closed cavity 11 of the sleeve body 3 is filled with negative thermal expansion material, and the non-connection end of the outermost side of the inner layer body 9 protrudes out of the fixing column 10; the fixed flange 4 of the sleeve body 3 is connected with the connecting flange 6 of the central rod, and the axis of the central rod is ensured to coincide with the axis of the sleeve body 3;
the silk bundle passes through 1 shaping passageway of mould body to accomplish silk bundle hot melt shaping work, when the detection pressure value that pressure sensor 12 that is located on outer body 8 inner wall detected was less than pressure threshold value, the siren sent sleeve body 3 and had rotatory risk alarm, stop work, overhauld.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides an outer fixed hollow core cotton mould, its characterized in that is in including mould body and setting sleeve subassembly on the mould body, sleeve subassembly includes the sleeve body and fixes central rod on the sleeve body, the sleeve body with the connection can be dismantled to the mould body, just the axis of sleeve body with the axis of mould body coincides mutually, be provided with fixed edge of a wing on the sleeve body, the central rod includes the shaping stick and connects the connection edge of a wing of shaping stick side, the connection edge of a wing with the connection can be dismantled on the fixed edge of a wing, the axis of central rod with the axis of the shaping passageway of mould body coincides mutually.
2. The external fixed hollow-core cotton mold according to claim 1, wherein the mold body is a hot melt tow pipe, and the mold body is made of iron, stainless steel or copper.
3. The external fixed hollow-core cotton mold according to claim 2, wherein the inner wall of the sleeve body is closely attached to the outer wall of the mold body.
4. An external fixed hollow-core cotton die as claimed in claim 1, wherein a plurality of connecting flanges are connected to the forming rod around the axial direction thereof.
5. An external fixed hollow-core cotton mold according to claim 4, wherein a plurality of connecting flanges are connected with connecting parts, and the connecting parts are detachably connected with the forming rods.
6. The external fixed hollow-core cotton mold according to claim 5, wherein the sleeve body comprises an outer layer body and an inner layer body, a plurality of circumferentially arranged fixing columns are arranged on the inner wall of the outer layer body, the inner layer body is connected between adjacent fixing columns, the outermost side of the inner layer body protrudes out of the non-connecting end of each fixing column, a closed cavity is formed between the inner layer body and the outer layer body, negative thermal expansion materials are filled in the closed cavity, and the inner layer body is made of elastic materials.
7. The external fixed hollow-core cotton mold according to claim 6, wherein a pressure sensor is arranged on the inner wall of the outer layer body, and when the pressure value detected by the pressure sensor is smaller than a pressure threshold value, an alarm gives an alarm that the sleeve body has a rotation risk.
8. The external fixed hollow cotton mold according to claim 7, wherein the mold body is provided with blocking rings, and the blocking rings are positioned at two sides of the sleeve body; fastening screws are uniformly distributed on the circumferential direction of the blocking ring, and the blocking ring is tightly attached to the outer wall of the die body through the fastening screws.
9. An external fixed hollow-core cotton die as claimed in claim 8, wherein the fastening screws adjacent in the circumferential direction are spaced apart by 90 °, 120 ° or 180 °.
10. The forming method of the external fixed hollow cotton mold according to claim 8 is characterized by comprising the following steps:
fixing one of the blocking rings on the die body through a fastening screw, sleeving the sleeve body on the die body, and fixing the other blocking ring on the die body through the fastening screw;
a negative thermal expansion material is filled in the closed cavity of the sleeve body, and the non-connecting end of the fixing column protrudes out of the outermost side of the inner layer body; the fixed flange of the sleeve body is connected with the connecting flange of the central rod, and the axis of the central rod is ensured to be coincident with the axis of the forming channel of the die body;
the silk bundle passes through mould body shaping passageway to accomplish silk bundle hot melt shaping work, when the detection pressure value that is located pressure sensor on the outer body inner wall and detects was less than the pressure threshold value, the siren sent the sleeve body has rotatory risk alarm, stop work, overhauls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866349.8A CN115091789B (en) | 2022-07-22 | 2022-07-22 | Outer fixed hollow cotton mold and molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866349.8A CN115091789B (en) | 2022-07-22 | 2022-07-22 | Outer fixed hollow cotton mold and molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115091789A true CN115091789A (en) | 2022-09-23 |
| CN115091789B CN115091789B (en) | 2024-05-17 |
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| CN202210866349.8A Active CN115091789B (en) | 2022-07-22 | 2022-07-22 | Outer fixed hollow cotton mold and molding method |
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