CN113665149B - Corrugated silica gel tube and production process thereof - Google Patents
Corrugated silica gel tube and production process thereof Download PDFInfo
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- CN113665149B CN113665149B CN202110935255.7A CN202110935255A CN113665149B CN 113665149 B CN113665149 B CN 113665149B CN 202110935255 A CN202110935255 A CN 202110935255A CN 113665149 B CN113665149 B CN 113665149B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
- B29C51/145—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets having at least one layer of textile or fibrous material combined with at least one plastics layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
- F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Textile Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The application relates to the field of silicone tubes, in particular to a corrugated silicone tube and a production process thereof. The production process comprises the following process steps: s1, adhesive tape preparation; s1.1, preparing an inner layer adhesive tape, and wrapping a layer of raw silica gel sheet on one side of the cooked silica gel sheet to obtain the inner layer adhesive tape; s1.2, preparing an outer-layer adhesive tape, and respectively combining a layer of cooked silica gel sheet and a layer of raw silica gel sheet on two sides of the enhancement layer to obtain the outer-layer adhesive tape; s2, preparing a rubber cylinder, namely rolling the outer-layer adhesive tape and the inner-layer adhesive tape into the rubber cylinder, and attaching a raw silica gel sheet of the inner-layer adhesive tape to a raw silica gel sheet of the outer-layer adhesive tape; s3, forming the rubber cylinder, namely sleeving the rubber cylinder on a forming core rod with corrugations, and performing vacuum forming to obtain a formed rubber cylinder; s4, vulcanization molding is carried out, the molded rubber cylinder is vulcanized, and the corrugated silicone tube is obtained after core removal. The corrugated silica gel tube comprises a tube body, wherein the tube body comprises an inner layer adhesive tape and an outer layer adhesive tape, and the outer layer adhesive tape is coated on the inner layer adhesive tape; the application has the effect of improving the adhesive force between the silica gel sheets.
Description
Technical Field
The application relates to the field of silicone tubes, in particular to a corrugated silicone tube and a production process thereof.
Background
With the increasing demands of the automobile industry for automobile comfort and light weight, the performance of the rubber hose product is gradually improved. The corrugated silicone tube adopted on the air inlet and outlet tube of the automobile turbocharger has excellent high temperature resistance and high pressure resistance, and more importantly has excellent buffer performance.
At present, a winding process is generally adopted to produce the corrugated silicone tube, a plurality of layers of silicone sheets are sequentially wound on a forming core rod, and hot air vulcanization is carried out after vacuum forming. However, the corrugated silicone tubes produced by the winding process are compounded by cross-linking after vulcanization, and the adhesive force between the silicone tubes is poor.
Disclosure of Invention
In order to improve the adhesive force between the silica gel sheets, the application provides a corrugated silica gel sheet and a production process thereof.
In a first aspect, the present application provides a corrugated silicone tube and a production process thereof, which adopts the following technical scheme: a corrugated silica gel tube and a production process thereof comprise the following process steps:
s1, adhesive tape preparation
S1.1 preparation of inner layer rubberized fabric
Pre-vulcanizing a layer of raw silica gel sheet to obtain a cooked silica gel sheet, and wrapping one side of the cooked silica gel sheet with a layer of raw silica gel sheet to obtain an inner layer adhesive tape;
s1.2 preparation of outer-layer adhesive tape
Pre-vulcanizing a layer of raw silica gel sheets to obtain cooked silica gel sheets, and respectively combining the cooked silica gel sheets and the raw silica gel sheets on two sides of the reinforcing layer to obtain an outer-layer adhesive tape;
s2, preparation of rubber cylinder
Rolling the outer-layer adhesive tape and the inner-layer adhesive tape on a winding drum machine by using a straight winding drum core mould to form a rubber drum, and attaching a raw silica gel sheet of the inner-layer adhesive tape to a raw silica gel sheet of the outer-layer adhesive tape;
s3, forming a rubber cylinder
Sleeving the rubber cylinder on a forming core rod with corrugations, and performing vacuum forming to obtain a forming rubber cylinder;
s4, vulcanization molding
And vulcanizing the formed rubber cylinder, and removing the core to obtain the corrugated silicone tube.
Through adopting above-mentioned technical scheme, inlayer adhesive tape is including two-layer film, and outer adhesive tape is including two-layer film and double-layered one deck enhancement layer, has four layers of film and one deck enhancement layer after outer adhesive tape and inlayer adhesive tape roll into the packing element. By combining the multi-layer rubber sheet and the reinforcing layer, compared with the corrugated silicone tube manufactured by the winding process, the strength of the tube is ensured, and meanwhile, the specific gravity of the corrugated silicone tube is reduced.
Before vulcanization molding, the inner adhesive tape is of a raw rubber-cooked rubber double-layer structure, and the outer adhesive tape is of a cooked rubber-reinforcing layer-raw rubber three-layer structure. The rubber is used as the innermost layer of the rubber cylinder, is sleeved on the forming core rod and is not easy to damage when contacting with the periphery of the forming core rod. The raw rubber has better viscosity, so that the raw rubber of the inner adhesive tape and the raw rubber of the outer adhesive tape can be mutually adhered, thereby being convenient for the combination of the inner adhesive tape and the outer adhesive tape.
Further, during production, the mandrel can be formed first and then, the formed mandrel can form a plurality of products at one time, and compared with the traditional winding process mode, the production efficiency is improved, the labor production cost is reduced, and the products are uniform.
Meanwhile, the vulcanization process of the roll forming product is stable, the formula is controllable, the buffer performance of the corrugated pipe can be greatly improved, the specific gravity of the product is reduced, the comfort of the whole vehicle is improved, and the light weight of the whole vehicle is realized.
Preferably, in S1.1, the raw silica gel sheet is pre-vulcanized by an oven, the vulcanization time is 10-12 minutes, and the vulcanization temperature is 170-180 ℃.
By adopting the scheme, the inner adhesive tape is directly presulfided in the oven, and can be presulfided in batch at the same time, so that the production efficiency is further improved.
Preferably, in S1.2, the raw silica gel sheet is pre-vulcanized through a drying tunnel, the vulcanization time is 5-7 minutes, and the vulcanization temperature is 140-165 ℃.
By adopting the scheme, the raw silica gel sheet is vulcanized along with the operation of the drying tunnel, so that continuous production is ensured, and the production efficiency is further improved.
Preferably, in S3, the rubber cylinder is sleeved on a forming core rod with corrugations, and after vacuum forming, the rubber belt is wound on the periphery of the rubber cylinder, so that the forming rubber cylinder is obtained.
Through adopting above-mentioned technical scheme, the sticky tape twines outside the packing element, compresses tightly the packing element on shaping plug, promotes the design effect to the packing element.
Preferably, in S4, the vulcanization condition is hot air vulcanization, the vulcanization temperature is 160-180 ℃, and the vulcanization time is 25-35min.
In a second aspect, the present application provides a corrugated silicone tube produced by using the above production process, which adopts the following technical scheme:
the corrugated silicone tube comprises a tube body, wherein the tube body comprises an inner layer adhesive tape and an outer layer adhesive tape, and the outer layer adhesive tape is coated on the inner layer adhesive tape.
Through adopting above-mentioned scheme, the setting of multilayer adhesive tape can promote the explosion-proof nature of ripple silicone tube, divides into inlayer adhesive tape and outer adhesive tape separately preparation with the body, and the homogeneity of inlayer adhesive tape and outer adhesive tape is convenient for separately control, compares in winding technology direct production multilayer adhesive tape, can promote the homogeneity of product quality greatly.
Preferably, the outer adhesive tape comprises a reinforcing layer and silica gel sheets bonded to both sides of the reinforcing layer.
By adopting the scheme, the reinforcing layer can increase the overall strength of the corrugated silicone tube.
Preferably, the reinforcing layer is an aramid cloth layer or a polyester cloth layer.
By adopting the scheme, according to the fact that the temperature of the internal medium of the air inlet pipe and the temperature of the internal medium of the air outlet pipe of the intercooler are different, the optional enhancement layers are different, and the two types of aramid cloth and polyester cloth are mainly used. The intercooler air inlet pipe is required to resist high temperature of 220 ℃ or above, and aramid cloth with excellent high temperature resistance is generally selected as the reinforcing layer. The working temperature of the air outlet pipe of the intercooler is lower, and polyester cloth (aramid cloth can be selected as well) can be used as the reinforcing layer. The strength and warp and weft density of the reinforcement layer wire can be selected according to the properties of the finished product (such as burst pressure, adhesive strength, etc.).
Preferably, the tube body is formed with a plurality of buffer protrusions at intervals along a length direction thereof.
By adopting the scheme, the buffer convex part can promote the buffer performance of the pipe body.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the combination of the multilayer film and the reinforcing layer, compared with the corrugated silicone tube manufactured by a winding process, the adhesive force between the corrugated silicone tube silicone films is improved, and meanwhile, the product quality uniformity of the corrugated silicone tube can be greatly improved.
2. The semi-formed cooked rubber can be obtained after the raw rubber is presulfided, so that the cooked rubber is taken as the innermost layer of the rubber cylinder, and the rubber sheet is not easy to damage when the cooked rubber is sleeved on the forming core rod and contacts with the periphery of the forming core rod.
3. The raw rubber has better viscosity, so that the raw rubber of the inner adhesive tape and the raw rubber of the outer adhesive tape can be mutually adhered, thereby being convenient for the combination of the inner adhesive tape and the outer adhesive tape.
4. During production, the winding drum can be firstly formed and then the forming core rod can be used for forming a plurality of products at one time, and compared with the traditional winding process mode, the production efficiency is improved, and meanwhile, the labor production cost is reduced.
5. The vulcanization process of the roll forming product is stable, the formula is controllable, the buffer performance of the corrugated pipe can be greatly improved, the specific gravity of the product is reduced, the comfort of the whole vehicle is improved, and the light weight of the whole vehicle is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of a corrugated silicone tube of the present application;
fig. 2 is a cross-sectional view of the layer structure of the corrugated silicone tube of the present application.
Reference numerals illustrate: 1. a tube body; 2. an inner layer adhesive tape; 3. an outer layer adhesive tape; 4. a silicone sheet; 5. a reinforcing layer; 6. and a buffer protrusion.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-2.
Examples
Example 1
The embodiment of the application discloses a corrugated silicone tube. Referring to fig. 1 and 2, the corrugated silicone tube comprises a tube body 1, wherein the inner diameter phi of the tube body 1 is 100mm, and the wall thickness is 4mm. The body 1 includes inlayer adhesive tape 2 and outer adhesive tape 3, and inlayer adhesive tape 2 includes two-layer silica gel piece 4, and outer adhesive tape 3 includes enhancement layer 5 and combines in the silica gel piece 4 on enhancement layer 5 both sides, and enhancement layer 5 is aramid fiber cloth layer or polyester cloth layer, in this embodiment, enhancement layer 5 is aramid fiber cloth layer. The silica gel sheet 4 is produced by Zhejiang Severe and technology Co., ltd.
In addition, the tube body 1 is formed with a plurality of buffer protrusions 6 at intervals along its length direction for improving the buffer performance of the corrugated silicone tube.
The embodiment of the application also discloses a production process of the corrugated silicone tube, which comprises the following process steps:
s1, adhesive tape preparation
S1.1 preparation of inner layer adhesive tape 2
Winding a layer of raw silica gel sheet 4 on a straight cylinder, pre-vulcanizing by an oven to obtain a cooked silica gel sheet 4, and winding and coating the raw silica gel sheet 4 on one surface of the cooked silica gel sheet 4 by rotating the straight cylinder to obtain an inner-layer adhesive tape 2, wherein the pre-vulcanizing time of the oven is 8 minutes, and the vulcanizing temperature is 160 ℃;
s1.2 preparation of outer layer adhesive tape 3
Pre-vulcanizing a layer of raw silica gel sheet 4 through a drying tunnel to obtain a cooked silica gel sheet 4, respectively combining the layer of cooked silica gel sheet 4 and the layer of raw silica gel sheet 4 on two sides of a reinforcing layer 5 through double-sided calendaring to obtain an outer layer adhesive tape 3, wherein the pre-vulcanization time of the drying tunnel is 5 minutes, and the vulcanization temperature is 140 ℃;
s2, preparation of rubber cylinder
Winding the inner layer adhesive tape 2 on a straight winding cylinder core mold, winding the outer layer adhesive tape 3 on the inner layer adhesive tape 2, winding the inner layer adhesive tape 2 into a rubber cylinder by using the straight winding cylinder core mold, and attaching a raw silica gel sheet 4 of the inner layer adhesive tape 2 to a raw silica gel sheet 4 of the outer layer adhesive tape 3;
s3, forming a rubber cylinder
Sleeving the rubber cylinder on a forming core rod with corrugations, and performing vacuum forming to obtain a forming rubber cylinder;
s4, vulcanization molding
And (3) placing the formed rubber cylinder in a drying tunnel for hot air vulcanization, and removing the core to obtain the corrugated silicone tube, wherein the vulcanization condition is that the vulcanization temperature is 160 ℃ and the vulcanization time is 23min.
Examples 2 to 16
The difference from example 1 is that the parameters of oven pre-vulcanization, oven channel pre-vulcanization, hot air vulcanization are different.
TABLE 1 vulcanization parameter table
Example 17
The difference from the embodiment 1 is that in S3, the rubber sleeve is vacuum-formed on the forming core rod with the corrugation, and then the adhesive tape is wound around the periphery of the rubber sleeve to obtain the forming rubber sleeve.
Comparative example
Comparative example 1
The preparation process of the corrugated silicone tube provided in comparative example 1 comprises the following steps:
s1, adhesive tape preparation
S1.1 preparation of inner layer adhesive tape 2
Bonding the two layers of raw silica gel sheets 4 to obtain an inner layer adhesive tape 2;
s1.2 preparation of outer layer adhesive tape 3
Combining a raw silica gel sheet 4 on two sides of the reinforcing layer 5 through double-sided calendaring to obtain an outer-layer adhesive tape 3;
s2, preparation of rubber cylinder
Winding the inner layer adhesive tape 2 on a straight winding cylinder core mold, winding the outer layer adhesive tape 3 on the inner layer adhesive tape 2, winding the inner layer adhesive tape 2 into a rubber cylinder by using the straight winding cylinder core mold, and attaching a raw silica gel sheet 4 of the inner layer adhesive tape 2 to a raw silica gel sheet 4 of the outer layer adhesive tape 3 to obtain the rubber cylinder;
s3, forming a rubber cylinder
Sleeving the rubber cylinder on a forming core rod with corrugations, and performing vacuum forming to obtain a forming rubber cylinder;
s4, vulcanization molding
And (3) placing the formed rubber cylinder in a drying tunnel for hot air vulcanization, and adopting water pressure to remove cores to obtain the corrugated silicone tube, wherein the vulcanization condition is that the vulcanization temperature is 160 ℃ and the vulcanization time is 23min.
Comparative example 2
The corrugated silicone tube disclosed in comparative example 2 was prepared by winding method, comprising the steps of:
1) Sequentially winding a silica gel sheet 4, aramid fiber cloth and three layers of silica gel sheets 4 on the forming core rod from inside to outside to obtain a rubber cylinder;
2) Vacuumizing and forming the rubber cylinder wound on the forming core rod to obtain a forming rubber cylinder;
3) And (3) placing the formed rubber cylinder in a drying tunnel for hot air vulcanization, and removing the core to obtain the corrugated silicone tube, wherein the vulcanization condition is that the vulcanization temperature is 160 ℃ and the vulcanization time is 23min.
Performance detection
1. Burst test
One end of the corrugated silica gel pipe is connected to a bursting test machine, the other end of the corrugated silica gel pipe is plugged by a plug, the bursting test machine inflates the corrugated silica gel pipe until bursting, and the maximum inflation pressure (MPa) is recorded. Model of explosion tester: GTP-100-J.
2. Adhesion test
And (3) taking a sample of 2.5cm multiplied by 10cm from the corrugated silica gel tube, manually separating one side of the inner adhesive tape from one side of the outer adhesive tape, fixing one side of the sample on a base of the tensile testing machine, connecting the other end of the sample to a clamp of the tensile testing machine, starting the tensile testing machine to pull the sample upwards until the outer adhesive tape and the inner adhesive tape of the sample are separated, and recording the average value (N/cm) of stripping tension. Tensile machine test equipment model: AI-7000-MUI.
3. Triaxial displacement fatigue resistance test
Installing the two ends of the corrugated silica gel pipe in a profiling tool of PVT test equipment, and setting PVT detection parameters: the internal temperature of the rubber tube is 190 ℃, the ambient temperature is 210 ℃, the pressure is 2.15bar, PVT test equipment is started for 246 hours, the change of the rubber tube is observed, and if no crack exists on the surface of the corrugated silica gel tube, the corrugated silica gel tube is qualified. PVT test equipment model: PTV1430W-PVT.
The detection results are shown in Table 2.
Table 2 table of performance test results
Comparative examples 1-17 and comparative examples 1-2 were available, and the corrugated silicone tubes prepared by the method of the present application all had superior explosion-proof properties and adhesion. In the explosion-proof performance, the corrugated silicone tubes prepared by the method have the inflation pressure of more than 2.6MPa, the stripping tension of more than 2.2N/cm, and the corrugated silicone tubes prepared in comparative examples 1-2 have the inflation pressure of more than 2MPa due to the same layer structure. However, the peel force was less than 2N/cm, and the adhesion between the silicone sheets was poor. In addition, as obtained in examples 1 to 17 and comparative example 1, the corrugated silicone tube was directly subjected to rolling lamination without being presulfided, and the fatigue resistance of the produced corrugated silicone tube was poor in triaxial displacement; as can be obtained from examples 1 to 17 and comparative example 2, the triaxial displacement fatigue resistance of the corrugated silicone tube manufactured by the winding process is poor.
From examples 1-3 and examples 4-17, S1.1, the green silica gel sheet was pre-vulcanized by an oven for 10-12 minutes at 170-180deg.C; in S1.2, the raw silica gel sheet is calendered and presulfided through a drying tunnel, the vulcanization time is 5-7 minutes, and the vulcanization temperature is 140-165 ℃. In the preferred vulcanization time range and vulcanization temperature range, the prepared corrugated silica gel tube has better explosion-proof performance and adhesive force.
From examples 4 to 16, S1.1, the green silica gel sheet was pre-vulcanized by an oven for 10 to 12 minutes at a vulcanization temperature of 170 to 180 ℃; in S1.2, the raw silica gel sheet is calendered and presulfided through a drying tunnel, the vulcanization time is 5-7 minutes, and the vulcanization temperature is 140-165 ℃. In the preferred vulcanization time range and the vulcanization temperature range, the explosion-proof performance and the adhesive force of the prepared corrugated silica gel pipe are relatively close, so that the vulcanization temperature and the vulcanization time have little influence on the explosion-proof performance and the adhesive force of the corrugated silica gel pipe in the preferred range.
The corrugated silica gel pipe prepared by winding the adhesive tape around the periphery of the rubber drum has greatly improved explosion-proof performance and adhesive force as obtained in examples 4-16 and 17.
The present invention is not limited to the preferred embodiments, and therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. A production process of a corrugated silicone tube is characterized in that: the method comprises the following process steps:
s1, adhesive tape preparation
S1.1, preparing an inner layer adhesive tape (2), namely pre-vulcanizing a layer of raw silica gel sheet (4) to obtain a cooked silica gel sheet (4), and wrapping the raw silica gel sheet (4) on one surface of the cooked silica gel sheet (4) to obtain the inner layer adhesive tape (2);
s1.1, pre-vulcanizing a raw silica gel sheet (4) by an oven, wherein the vulcanization time is 10-12 minutes, and the vulcanization temperature is 170-180 ℃;
s1.2, preparing an outer-layer adhesive tape (3), namely pre-vulcanizing a layer of raw silica gel sheet (4) to obtain a cooked silica gel sheet (4), and respectively combining the cooked silica gel sheet (4) and the raw silica gel sheet (4) on two sides of the reinforcing layer (5) to obtain the outer-layer adhesive tape (3);
s1.2, pre-vulcanizing a raw silica gel sheet (4) through a drying tunnel, wherein the vulcanizing time is 5-7 minutes, and the vulcanizing temperature is 140-165 ℃;
s2, preparing a rubber cylinder, namely rolling the outer-layer adhesive tape (3) and the inner-layer adhesive tape (2) into the rubber cylinder on a winding machine by utilizing a straight winding core mould, and attaching a raw silica gel sheet (4) of the inner-layer adhesive tape (2) to the raw silica gel sheet (4) of the outer-layer adhesive tape (3);
s3, forming the rubber cylinder, namely sleeving the rubber cylinder on a forming core rod with corrugations, and performing vacuum forming to obtain a formed rubber cylinder;
s4, vulcanizing the formed rubber cylinder by vulcanization molding, and removing the core to obtain the corrugated silicone pipe.
2. The process for producing a corrugated silicone tube according to claim 1, wherein: in S1.2, the cooked silica gel sheet (4) and the raw silica gel sheet (4) are respectively combined on two sides of the reinforcing layer (5) through double-sided calendaring.
3. The process for producing a corrugated silicone tube according to claim 1, wherein: and S3, sleeving the rubber cylinder on a corrugated forming core rod, vacuumizing and forming, and winding adhesive tape on the periphery of the rubber cylinder to obtain the forming rubber cylinder.
4. The process for producing a corrugated silicone tube according to claim 1, wherein: in S4, the vulcanization condition is that hot air is used for vulcanization, the vulcanization temperature is 160-180 ℃, and the vulcanization time is 25-35min.
5. A corrugated silicone tube produced by the production process of any one of claims 1-4, characterized in that: the pipe comprises a pipe body (1), wherein the pipe body (1) comprises an inner layer adhesive tape (2) and an outer layer adhesive tape (3), and the outer layer adhesive tape (3) is coated on the inner layer adhesive tape (2).
6. The corrugated silicone tube of claim 5, wherein: the outer adhesive tape (3) comprises a reinforcing layer (5) and silica gel sheets (4) combined on two sides of the reinforcing layer (5).
7. The corrugated silicone tube of claim 6, wherein: the reinforcing layer (5) is an aramid cloth layer or a polyester cloth layer.
8. The corrugated silicone tube of claim 7, wherein: the pipe body (1) is provided with a plurality of buffer convex parts (6) at intervals along the length direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110935255.7A CN113665149B (en) | 2021-08-16 | 2021-08-16 | Corrugated silica gel tube and production process thereof |
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| CN202110935255.7A CN113665149B (en) | 2021-08-16 | 2021-08-16 | Corrugated silica gel tube and production process thereof |
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| CN102285129B (en) * | 2011-07-18 | 2013-04-17 | 厦门创信元橡塑制品有限公司 | Process for producing rubber tube |
| CN102628527B (en) * | 2012-04-06 | 2014-01-01 | 浙江峻和橡胶科技有限公司 | Turbocharged corrugated pipe and production process thereof |
| CN103899856B (en) * | 2014-04-24 | 2016-03-02 | 山东美晨科技股份有限公司 | Automobile corrugated silicone tube and preparation method thereof |
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