CN111559062A - Production process of omega-shaped hard semicircular drain pipe - Google Patents
Production process of omega-shaped hard semicircular drain pipe Download PDFInfo
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- CN111559062A CN111559062A CN202010397650.XA CN202010397650A CN111559062A CN 111559062 A CN111559062 A CN 111559062A CN 202010397650 A CN202010397650 A CN 202010397650A CN 111559062 A CN111559062 A CN 111559062A
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
The scheme discloses a production process of an omega-shaped hard semicircular drain pipe in the technical field of tunnel drainage pipelines, which takes high-density polyethylene resin as a raw material, and the process comprises the steps of heating an extruder to 180-200 ℃ in a gradient manner, preserving heat for 1h, and setting the process temperature of each section of the extruder, wherein the temperature of a feeding section is 80-100 ℃, the temperature of a compression section is 150-170 ℃, and the temperature of a homogenization section is 220-260 ℃; after the temperature of the three sections is finished, preserving the heat for 0.5-1 h; and then melting the high-density polyethylene resin by a preheated extruder to obtain a high-density polyethylene resin melt, extruding by using a corrugation forming die to obtain a single-wall corrugated pipe, and cutting the single-wall corrugated pipe from the axial lead direction of the single-wall corrugated pipe by a cutting machine. The appearance of the pipe is of an annular corrugated structure, the compression resistance of the pipe is enhanced, the resistance of the pipe to guniting load is enhanced, and compared with the prior omega-shaped soft spring semicircular drain pipe, the pipe has the advantages of obvious compression resistance and difficult deformation.
Description
Technical Field
The invention belongs to the technical field of tunnel drainage pipelines, and particularly relates to a production process of an omega-shaped hard semicircular drainage pipe.
Background
The spring semicircular drain pipe is also called a soft semicircular pipe, a semicircular drain pipe and an omega-shaped soft spring semicircular drain pipe and is a semicircular drain pipe special for a tunnel. The spring semicircular drain pipe is suitable for non-pressure water prevention and drainage of a tunnel, ensures smooth drainage in the tunnel structure, enables the periphery of a tunnel lining structure to be in a non-water pressure environment, avoids the action of water pressure on the periphery of the tunnel, reduces the bearing capacity of a tunnel arch wall, ensures smooth drainage and ensures that the tunnel does not leak water in the service life. The material has the characteristics of acid and alkali resistance, no permeation, elasticity and softness, capability of being bent randomly, capability of adapting to gradual deformation of surrounding rock and the like; can meet the requirements of uneven surrounding rock surfaces and cracks with various shapes; the blockage caused by the direct inflow of the surrounding rock silt can be avoided; the impact force of the sprayed concrete can be borne without damage and deformation; plays a certain role in eliminating the water pressure at the periphery of the tunnel and improves the stress condition of the lining structure.
The soft formula spring semicircle drain pipe of omega type on the current market mainly used highway, railway tunnel are prevented in the engineering construction of drainage, nevertheless because its variability is stronger, and compressive resistance is not enough, warp easily when pressure is too big, leads to intensity and holding power not enough, and then makes the peripheral drainage in tunnel not smooth, and the horizontal water in tunnel is arranged in can't longitudinal pipeline, produces water pressure and leads to the tunnel top to leak, needs frequent maintenance.
Disclosure of Invention
The invention aims to provide a production process of an omega-shaped hard semicircular drain pipe, so as to produce the omega-shaped hard semicircular drain pipe and solve the problems of insufficient pressure resistance and easy deformation of the existing omega-shaped spring semicircular drain pipe.
The production process of the omega-shaped hard semicircular drain pipe comprises the following steps:
step one, preparing raw materials: preparing high-density polyethylene resin, and drying at 70-80 ℃ for 1.5-3.5 h for later use;
step two, preheating an extruder: the extruder is a single-screw extruder with inclined threads, the temperature of the head of the single-screw extruder is increased to 180-200 ℃ in a gradient manner, the temperature is kept for 1h, and then the process temperature of each section of the extruder is set, wherein the temperature of the feeding section is 80-100 ℃, the temperature of the compression section is 150-170 ℃, and the temperature of the homogenization section is 220-260 ℃; after the temperature of the three sections is finished, preserving the heat for 0.5-1 h;
step three, melting: adding the high-density polyethylene resin prepared in the step one from a preheated feeding section of an extruder, rotating a screw rod with inclined threads in the extruder in a heated charging barrel, extruding the high-density polyethylene resin forwards to gradually heat the high-density polyethylene resin, uniformly plasticizing and melting the high-density polyethylene resin, and extruding the high-density polyethylene resin to obtain a high-density polyethylene resin melt;
step four, extrusion forming: conveying the high-density polyethylene resin melt in the third step to a ripple forming die for extrusion forming, wherein the ripple forming die comprises an inner-layer flow channel, an outer-layer flow channel, a sizing sleeve and a water core pump which are coaxially arranged from outside to inside, compressed air is introduced between the inner-layer flow channel and the outer-layer flow channel, and the high-density polyethylene resin melt passes through the inner-layer flow channel and the outer-layer flow channel to obtain a single-wall corrugated pipe;
step five, segmentation: and cutting the single-wall corrugated pipe from the axial lead direction of the single-wall corrugated pipe through a cutting machine to obtain the omega-shaped hard semicircular drain pipe.
The beneficial technical effect of this scheme is: the omega-shaped hard semicircular drain pipe produced by the scheme takes high-density polyethylene resin as a main raw material, the water content of the omega-shaped hard semicircular drain pipe can reach one thousandth after the omega-shaped hard semicircular drain pipe is dried for 1.5 to 3.5 hours at the temperature of 70 to 80 ℃, and a novel plastic pipe which is flat in single wall and corrugated in omega arc (circular wave) shape is manufactured by combining the extrusion molding process of the scheme, and the omega-shaped hard semicircular drain pipe is mainly used for being buried in the field of secondary lining drainage of a tunnel. It has the following characteristics:
1. the external pressure resistance is strong: the appearance is annular ripple structure, has strengthened the resistance to compression degree of tubular product greatly to having strengthened the pipeline to the resistance of whitewashing load, in this performance aspect, omega type stereoplasm semicircle drain pipe has obvious resistance to compression advantage non-deformable with preceding omega type soft spring semicircle drain pipe.
2. The construction is convenient: the omega-shaped hard semicircular water discharge pipe is light in weight and convenient to carry and connect, so that the construction is rapid, and the maintenance work is simple. Under the condition of tight construction period and poor construction conditions, the advantages are more obvious.
3. The flow is large: the pipe adopting the omega-shaped hard semicircular drain pipe can pass larger flow than the omega-shaped soft spring semicircular drain pipe with a larger caliber.
4. Good low temperature resistance and impact resistance: the embrittlement temperature of the omega-shaped hard semicircular drain pipe is-70 ℃. In general, special protection measures are not needed in construction under low temperature conditions (above minus 30 ℃), construction is convenient in winter, and the omega-shaped hard semicircular drain pipe has good impact resistance.
6. The chemical stability is good: since the HDPE molecules are not polar, the chemical stability is excellent. Most chemical media do not destroy them except a few strong oxidizers. The pipeline cannot be damaged by soil, electric power and acid and alkali factors of a common use environment, bacteria cannot grow, scaling cannot occur, and the flow area cannot be reduced along with the increase of the operation time.
7. The service life is long: under the condition of not being subjected to sunlight and ultraviolet rays, the service life of the omega-shaped hard semicircular drain pipe can reach more than 50 years.
8. Excellent wear resistance: germany has demonstrated that HDPE has even several times higher abrasion resistance than steel pipe.
9. Degree of deflection: the omega-shaped hard semicircular drain pipe with a certain length can axially deflect by 360 degrees and is not influenced by the uneven and concave parts of the tunnel to a certain degree.
Further, the high density polyethylene resin has a model number of HD55O2 XA.
Further, the raw material also comprises calcium powder. The reinforced modified master batch can enhance the plasticity of the high-density polyethylene resin melt, improve the product appearance qualification rate and enhance the impact strength and the ring stiffness of the product. The calcium powder is used as the reinforced modified master batch used in the process, and the dispersibility, the coupling property and the modification degree of the polyethylene have better effects.
Further, the extrusion pressure of the extruder is 20-30 Mpa. If the extrusion pressure is too low, the product is not easy to be shaped. Generally, increasing the extrusion pressure, the melt volume is compressed, the molecular chains are tightly packed, the viscosity of the material increases, the fluidity decreases, the extrusion yield decreases, and the material is decomposed due to the increase of viscosity and the increase of shear heat, thereby increasing the energy consumption ratio. But from the aspect of product quality, the product is compact, which is beneficial to improving the product quality. If the extrusion pressure is too low, the melt strength is low, the tube blank is easy to blow during molding, and the mechanical property is also reduced. However, when the extrusion pressure is 20-30 MPa, the above situation can be effectively avoided.
Further, the rotating speed of the screw in the extruder is 75-85% of the maximum rotating speed. The screw rotation speed largely determines the extrusion capacity of the extruder, but too high a rotation speed causes a large amount of shearing heat energy to be generated in the barrel part, and the performance of the material is greatly damaged at the same temperature. The long-term high-speed operation also leads to the end of the screw life in advance. When the rotating speed of a screw in the extruder is 75-85% of the highest rotating speed, the rotating speed of the screw can reach the highest solid conveying capacity in the normal production process, so that on one hand, materials can be prevented from thermal degradation under the action of larger shearing force, and on the other hand, the quality of products and the extrusion efficiency can be improved; the amount of high density polyethylene resin melt that can be extruded in 4min produces single wall corrugated pipe of 6 meters.
Further, before the extrusion molding in the fourth step, the temperature of the high-density polyethylene resin melt is controlled to be 200-250 ℃. If the temperature of the high-density polyethylene resin melt is too high and exceeds the limit temperature, the thermal degradation of the material is serious, and the quality of the pipe is affected. The temperature is too low, the material plasticization is not good, and the surface of the molded product is rough.
Further, in the fourth step, before extrusion molding, the temperature of the high-density polyethylene resin melt is controlled to 230 ℃. The high-density polyethylene resin melt at the temperature has no thermal degradation condition, and the surface of the produced product is smooth.
Further, in the second step, a charging barrel of the extruder is divided into a machine head and six sections along the axial direction of the charging barrel, wherein the temperature of the first section is 80-100 ℃, and the temperature of the second section to the sixth section is 175-200 ℃; the temperature of the machine head is 190-220 ℃.
Further, the extruder in the second step is heated in a gradient manner in the following steps: the first gradient is 100-120 ℃, and the temperature is kept for 2 h; the second gradient is 150-160 ℃, and the temperature is kept for 1 h; and the third gradient is 180-200 ℃, and the temperature is kept for 1 h.
Further, the raw material in the first step also comprises a defoaming agent. The common raw materials can be directly put into use according to the moisture content, and if the moisture content is large, the defoaming agent with the moisture content within 2 percent can be added to improve the production efficiency.
Detailed Description
The following is further detailed by way of specific embodiments:
example 1: the production process of the omega-shaped hard semicircular drain pipe comprises the following steps:
step one, preparing raw materials: preparing high-density polyethylene resin and a defoaming agent, and drying the high-density polyethylene resin at the temperature of 70-80 ℃ for 2 hours for later use;
step two, preheating an extruder: the extruder is a single-screw extruder with inclined-plane threads, the machine head of the single-screw extruder is subjected to gradient temperature rise, and the gradient temperature rise mode is as follows: the first gradient is 100-120 ℃, and the temperature is kept for 2 h; the second gradient is 150-160 ℃, and the temperature is kept for 1 h; the third gradient is 180-200 ℃, the temperature is kept for 1h, and then the process temperature of each section of the extruder is set, wherein the temperature of the feeding section is 80-100 ℃, the temperature of the compression section is 150-170 ℃, and the temperature of the homogenization section is 220-260 ℃; preserving the heat for 1h after the temperature of the three sections is finished; a charging barrel of the extruder is divided into a machine head and six sections along the axial direction of the charging barrel, wherein the temperature of the first section is 80-100 ℃, and the temperature of the second section to the sixth section is 175-185 ℃; the temperature of the machine head is 210-220 ℃;
step three, melting: the extrusion pressure of the extruder is adjusted to be 25Mpa, and the rotating speed of a screw in the extruder is controlled to be 75-85% of the maximum rotating speed. Adding the high-density polyethylene resin prepared in the step one from a preheated feeding section of an extruder, rotating a screw rod with inclined threads in the extruder in a heated charging barrel, extruding the high-density polyethylene resin forwards to gradually heat the high-density polyethylene resin, uniformly plasticizing and melting the high-density polyethylene resin, and extruding the high-density polyethylene resin to obtain a high-density polyethylene resin melt;
step four, extrusion forming: controlling the temperature of the high-density polyethylene resin melt in the third step to be 230-250 ℃, and then conveying the high-density polyethylene resin melt to a ripple forming die for extrusion forming, wherein the ripple forming die comprises an inner-layer flow channel, an outer-layer flow channel, a sizing sleeve and a water core pump which are coaxially arranged from outside to inside, compressed air is introduced between the inner-layer flow channel and the outer-layer flow channel, and the high-density polyethylene resin melt passes through the inner-layer flow channel and the outer-layer flow channel to obtain a single-wall corrugated pipe;
step five, segmentation: the single-wall corrugated pipe is cut from the axial lead direction of the single-wall corrugated pipe through a cutting machine.
Example 2: the production process of the omega-shaped hard semicircular drain pipe comprises the following steps:
step one, preparing raw materials: preparing high-density polyethylene resin, a defoaming agent and calcium powder, and drying the high-density polyethylene resin at 70-80 ℃ for 3.5 hours for later use;
step two, preheating an extruder: the extruder is a single-screw extruder with inclined-plane threads, the machine head of the single-screw extruder is subjected to gradient temperature rise, and the gradient temperature rise mode is as follows: the first gradient is 100-120 ℃, and the temperature is kept for 2 h; the second gradient is 150-160 ℃, and the temperature is kept for 1 h; the third gradient is 180-200 ℃, the temperature is kept for 1h, and then the process temperature of each section of the extruder is set, wherein the temperature of the feeding section is 80-100 ℃, the temperature of the compression section is 150-170 ℃, and the temperature of the homogenization section is 220-260 ℃; preserving the heat for 1h after the temperature of the three sections is finished; a charging barrel of the extruder is divided into a machine head and six sections along the axial direction of the charging barrel, wherein the temperature of the first section is 80-100 ℃, and the temperature of the second section to the sixth section is 190-195 ℃; the temperature of the machine head is 200-210 ℃;
step three, melting: the extrusion pressure of the extruder is adjusted to be 20Mpa, and the rotating speed of a screw in the extruder is controlled to be 75-85% of the maximum rotating speed. Adding the high-density polyethylene resin prepared in the step one from a preheated feeding section of an extruder, rotating a screw rod with inclined threads in the extruder in a heated charging barrel, extruding the high-density polyethylene resin forwards to gradually heat the high-density polyethylene resin, uniformly plasticizing and melting the high-density polyethylene resin, and extruding the high-density polyethylene resin to obtain a high-density polyethylene resin melt;
step four, extrusion forming: controlling the temperature of the high-density polyethylene resin melt in the third step to be 220-230 ℃, and then conveying the high-density polyethylene resin melt to a ripple forming die for extrusion forming, wherein the ripple forming die comprises an inner-layer flow channel, an outer-layer flow channel, a sizing sleeve and a water core pump which are coaxially arranged from outside to inside, compressed air is introduced between the inner-layer flow channel and the outer-layer flow channel, and the high-density polyethylene resin melt passes through the inner-layer flow channel and the outer-layer flow channel to obtain a single-wall corrugated pipe;
step five, segmentation: the single-wall corrugated pipe is cut from the axial lead direction of the single-wall corrugated pipe through a cutting machine.
Example 3: the production process of the omega-shaped hard semicircular drain pipe comprises the following steps:
step one, preparing raw materials: preparing high-density polyethylene resin and a defoaming agent, and drying the high-density polyethylene resin at 70-80 ℃ for 1.5h for later use;
step two, preheating an extruder: the extruder is a single-screw extruder with inclined-plane threads, the machine head of the single-screw extruder is subjected to gradient temperature rise, and the gradient temperature rise mode is as follows: the first gradient is 100-120 ℃, and the temperature is kept for 2 h; the second gradient is 150-160 ℃, and the temperature is kept for 1 h; the third gradient is 180-200 ℃, the temperature is kept for 1h, and then the process temperature of each section of the extruder is set, wherein the temperature of the feeding section is 80-100 ℃, the temperature of the compression section is 150-170 ℃, and the temperature of the homogenization section is 220-260 ℃; preserving the heat for 0.5h after the temperature of the three sections is finished; a charging barrel of the extruder is divided into a machine head and six sections along the axial direction, wherein the temperature of the first section is 80-100 ℃, and the temperature of the second section to the sixth section is 195-200 ℃; the temperature of the machine head is 190-200 ℃;
step three, melting: the extrusion pressure of the extruder is adjusted to be 30Mpa, and the rotating speed of a screw in the extruder is controlled to be 75-85% of the maximum rotating speed. Adding the high-density polyethylene resin prepared in the step one from a preheated feeding section of an extruder, rotating a screw rod with inclined threads in the extruder in a heated charging barrel, extruding the high-density polyethylene resin forwards to gradually heat the high-density polyethylene resin, uniformly plasticizing and melting the high-density polyethylene resin, and extruding the high-density polyethylene resin to obtain a high-density polyethylene resin melt;
step four, extrusion forming: controlling the temperature of the high-density polyethylene resin melt in the third step to be 200-220 ℃, and then conveying the high-density polyethylene resin melt to a ripple forming die for extrusion forming, wherein the ripple forming die comprises an inner-layer flow channel, an outer-layer flow channel, a sizing sleeve and a water core pump which are coaxially arranged from outside to inside, compressed air is introduced between the inner-layer flow channel and the outer-layer flow channel, and the high-density polyethylene resin melt passes through the inner-layer flow channel and the outer-layer flow channel to obtain a single-wall corrugated pipe;
step five, segmentation: the single-wall corrugated pipe is cut from the axial lead direction of the single-wall corrugated pipe through a cutting machine.
Among the above, the high density polyethylene resin having the type HD55O2XA is preferable.
Defoaming agent: the manufacturer is Olympic New materials Co., Ltd, in the east region of Meishan.
In the above scheme, the addition amount of the calcium powder is 2-3%, preferably 2.5% of the amount of the high-density polyethylene resin.
The scheme takes high-density polyethylene resin as a main raw material, and adopts an extrusion molding process to manufacture a novel corrugated plastic pipe which is flat in single wall and has an omega-arc (circular wave) shape, and the novel corrugated plastic pipe is mainly used for secondary lining drainage embedded in a tunnel. Such shape structure, greatly increased the resistance to compression of tubular product to having strengthened the pipeline to the resistance of whitewashing load, compared in omega type soft spring semicircle drain pipe before, the omega type stereoplasm semicircle drain pipe of this scheme preparation has obvious resistance to compression advantage, non-deformable moreover.
The corrugated forming die used in the invention is a forming die consisting of dozens of pairs of half forming modules, is purchased from Changzhou wood transmission machinery Limited company and has the following types: ZLYJ 200.
Claims (10)
1. The production process of the omega-shaped hard semicircular drain pipe is characterized by comprising the following steps of:
step one, preparing raw materials: preparing high-density polyethylene resin, and drying at 70-80 ℃ for 1.5-3.5 h for later use;
step two, preheating an extruder: the extruder is a single-screw extruder with inclined threads, the temperature of the head of the single-screw extruder is increased to 180-200 ℃ in a gradient manner, the temperature is kept for 1h, and then the process temperature of each section of the extruder is set, wherein the temperature of the feeding section is 160-180 ℃, the temperature of the compression section is 150-170 ℃, and the temperature of the homogenization section is 220-260 ℃; after the temperature of the three sections is finished, preserving the heat for 0.5-1 h;
step three, melting: adding the high-density polyethylene resin prepared in the step one from a preheated feeding section of an extruder, rotating a screw rod with inclined threads in the extruder in a heated charging barrel, extruding the high-density polyethylene resin forwards to gradually heat the high-density polyethylene resin, uniformly plasticizing and melting the high-density polyethylene resin, and extruding the high-density polyethylene resin to obtain a high-density polyethylene resin melt;
step four, extrusion forming: conveying the high-density polyethylene resin melt in the third step to a ripple forming die for extrusion forming, wherein the ripple forming die comprises an inner-layer flow channel, an outer-layer flow channel, a sizing sleeve and a water core pump which are coaxially arranged from outside to inside, compressed air is introduced between the inner-layer flow channel and the outer-layer flow channel, and the high-density polyethylene resin melt passes through the inner-layer flow channel and the outer-layer flow channel to obtain a single-wall corrugated pipe;
step five, segmentation: and cutting the single-wall corrugated pipe from the axial lead direction of the single-wall corrugated pipe through a cutting machine to obtain the omega-shaped hard semicircular drain pipe.
2. The production process of the omega-shaped hard semicircular drain pipe according to claim 1, characterized in that: the high-density polyethylene resin is HD55O2 XA.
3. The production process of the omega-shaped hard semicircular drain pipe according to claim 2, characterized in that: the raw material also comprises calcium powder.
4. The production process of the omega-shaped hard semicircular drain pipe according to claim 3, characterized in that: the extrusion pressure of the extruder is 20-30 Mpa.
5. The production process of the omega-shaped hard semicircular drain pipe according to claim 4, characterized in that: the rotating speed of the screw in the extruder is 75-85% of the highest rotating speed.
6. The production process of the omega-shaped hard semicircular drain pipe according to any one of claims 1 to 5, characterized in that: and before the extrusion forming in the fourth step, controlling the temperature of the high-density polyethylene resin melt to be 200-250 ℃.
7. The production process of the omega-shaped hard semicircular drain pipe according to claim 6, characterized in that: in the fourth step, before extrusion forming, the temperature of the high-density polyethylene resin melt is controlled at 230 ℃.
8. The production process of the omega-shaped hard semicircular drain pipe according to claim 7, characterized in that: in the second step, a charging barrel of the extruder is divided into a machine head and six sections along the axial direction of the charging barrel, wherein the temperature of the first section is 80-100 ℃, and the temperature of the second section to the sixth section is 175-200 ℃; the temperature of the machine head is 190-220 ℃.
9. The production process of the omega-shaped hard semicircular drain pipe according to claim 8, characterized in that: the extruder in the second step adopts a gradient heating mode as follows: the first gradient is 100-120 ℃, and the temperature is kept for 2 h; the second gradient is 150-160 ℃, and the temperature is kept for 1 h; and the third gradient is 180-200 ℃, and the temperature is kept for 1 h.
10. The production process of the omega-shaped hard semicircular drain pipe according to claim 9, characterized in that: the raw material of the step one also comprises a defoaming agent.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937075A (en) * | 2014-05-06 | 2014-07-23 | 康泰塑胶科技集团有限公司 | Polyethylene corrugated pipe and preparation method thereof |
| CN107345016A (en) * | 2016-05-06 | 2017-11-14 | 江苏桓通环境科技有限公司 | A kind of HDPE steel band reinforced spiral ripple pipes and its production technology |
| CN107345019A (en) * | 2016-05-06 | 2017-11-14 | 江苏桓通环境科技有限公司 | A kind of refractory polyethylene helical bellows and preparation method |
-
2020
- 2020-05-12 CN CN202010397650.XA patent/CN111559062A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937075A (en) * | 2014-05-06 | 2014-07-23 | 康泰塑胶科技集团有限公司 | Polyethylene corrugated pipe and preparation method thereof |
| CN107345016A (en) * | 2016-05-06 | 2017-11-14 | 江苏桓通环境科技有限公司 | A kind of HDPE steel band reinforced spiral ripple pipes and its production technology |
| CN107345019A (en) * | 2016-05-06 | 2017-11-14 | 江苏桓通环境科技有限公司 | A kind of refractory polyethylene helical bellows and preparation method |
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Application publication date: 20200821 |
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