Rigid PVC female thread muffler pipe
DATE：2022/9/15 9:09:13 / READ： / SOURCE：This station
Rigid PVC female thread muffler pipe
The rigid PVC inner thread muffler tube is cooled and cooled to quickly reduce or stop the foaming process of the core layer foam. The impact of the inner wall of the pipe, together with the air in the mixed fluid, can be discharged smoothly, reducing the noise generated by the drainage in the pipe. The drainage flow noise of the spiral muffler pipe can reduce the interference of daily life by 8~10dB. Compared with the ordinary rigid PVC drainage pipe, the structure of the rigid polyvinyl chloride inner spiral muffler pipe is different from that of the ordinary rigid polyvinyl chloride drainage pipe, except that the inner wall of the pipe has a spiral rib with a triangular cross-section. , shown in 5-35.
The inner spiral section of the rigid PVC inner spiral is 23mm in height and 50mm in pitch. The wall structure can be solid with equal thickness. Figure 5-35 Solid wall PVC spiral is a foam sandwich structure with a core layer. The inner wall structure of the muffler pipe The rigid PVC inner spiral muffler pipe can reduce the noise of the water flow when conveying water. The spiral protruding triangular ribs in the pipe can force the water flow to rotate and flow down along the inner wall of the pipe, which regulates the direction of the body flow, thereby The collision between the water flow and the air in the pipe is reduced, and the purpose of reducing the noise caused by the flow is achieved.
(1) The extrusion molding of the rigid PVC inner spiral muffler pipe is exactly the same as the extrusion molding material of the rigid PVC pipe, which can be produced by referring to the formula of 5.41.
(2) Equipment conditions for extrusion molding of rigid PVC inner spiral muffler pipe
The A-type production process route is the same as the PVC drainage pipe type production equipment and production process route, the difference is that the structure of the pipe forming mold is slightly different. As shown in Figure 5-36, the mold structure for pipe forming is a 90-degree straight line between the center line of the mold and the center line of the extruder for raw materials. During production, there is a mandrel in the mold body that can rotate under the drive of the transmission sprocket. On the outer surface of the mandrel that can rotate, there are six uniformly distributed, equal-guaranteed three layers. When the molten material in the mold is extruded from here to form the tube blank, the continuously rotating core boundary is formed.
1- Mould; 2- Rotating mandrel; 3- Sealing ring; 4- Moulding cover; 5- Pressing purple screw taper field 6- Drive shaft; 7- Fixed mandrel; 8- Mould body; 9- Melt inlet; 10 a sprocket;
11, 13-ball bearing; 12-adjusting screw
The sprocket on the molding die body is decelerated by the commutator motor (or DC motor) through the reduction box, and then driven by the chain.
(3) Key points of process operation
① The extrusion molding process conditions (material formula, raw material compounding method and extrusion process temperature) of the rigid PVC inner spiral muffler pipe can be completely produced according to the extrusion molding process of the rigid PVC sewage pipe.
②When designing the mold structure, pay attention that the length of the triangular groove section should be slightly longer than the length of the mold mandrel for ordinary rigid PVC pipes, but the longest should not exceed 10mm, and the depth of the triangular groove should be 2.5~3mm; The rotational speed n is calculated from the linear speed v of the extruded tube blank, the helix angle a of the spiral rib and the inner diameter d of the tube formed by the mandrel, n=vtana/πd. High temperature resistant graphite or polytetrafluoroethylene can be used for foot resistance, and attention should also be paid to these two phases.
The gap between moving parts should be able to be adjusted at any time. 5.4.10 Rigid PVC Spiral Reinforced PVC Hose
Rigid polyvinyl chloride spiral reinforced soft PVC
Type reinforced pipe, its structure is shown in Figure 5-37, because there is a rigid PVC element in the PVC hose
The strip spiral is used as the skeleton, thereby improving the rigidity and working strength of the dream PVC pipe. Soft spiral reinforced PVC
Such pressure liquid, in addition, this tube also has resistance to
Rotary reinforced PVC hose structure 1-rigid PVC spiral strip;
Corrosion, easy to bend and so on. in some areas
2 a soft PVC pipe wall
It can replace rubber pipes or steel pipes to transport liquid gases and granular solids; it can also replace metal
The hose is used as the cable sheath in the electromechanical equipment, etc.
(1) The raw material is selected from the rigid PVC spiral strip forming material formula and the soft PVC pipe forming material formula in the rigid PVC spiral reinforced soft PVC pipe. You can refer to the materials used for rigid PVC products. Formulation and formulation design of soft PVC pipe forming materials
The reference formulations for forming the two articles in the tube are as follows.
Formulation of soft PVC transparent pipe forming materials (parts by mass):
Polyvinyl chloride (PVC SG4) 100 Dibutyltin dilaurate (C102)
Dioctyl Phthalate (DOP) 60 Epoxidized Soybean Oil (ESO) 1.5
Dioctyl Adipate (DOA) 6.5 Paraffin 3.5
Barium cadmium zinc liquid stabilizer 0.8 0.25
Rigid PVC spiral strip material formula (parts by mass): polyvinyl chloride (PVC SG6)
100 barium stearate (BaSt)
Tribasic lead sulfate (3PbO)
1.5 Lead stearate (PbSt) 1.5
-330- Dibasic lead phosphite (2PbO) 1.5 Chlorinated polyethylene (CPE) 0.7 5.0
The 5th meter plastic pipe is the best
1.2 Light calcium carbonate (CaCO;)
River baked British resin CACR-401)
0.5 Titanium dioxide (TO:) 10
0.5 1.5
Household Acid(HS:)
(2) For the extrusion molding of ethylene-reinforced PVC, since the product is formed by compounding two kinds of PVC products with different properties, the different formula materials of the two products are mixed in two mixers, and then
At one time, it was plasticized and melted in two extruders respectively. The extruded molten material is respectively extruded from the two mouths of the forming die into the die for forming the rigid polyvinyl chloride spiral reinforced PVC hose to synthesize the tube blank. The specifications of the two extruders are selected, because the size of the extruder for soft PVC material is larger than that of the extruder for extruding rigid V and soft VC when forming the composite pipe. The structure of the screw is exactly the same. Rigid PVC Spiral Reinforced Knot 5
Figure 5-38 Mold structure for rigid PVC spiral reinforced PVC hose molding Rotary die; 8-die rotary positioning sleeve A-soft PVC melt inlet; B-hard PVC melt inlet
It can be seen from the structure diagram of the forming mold of the reinforced soft PVC pipe that the structure of this composite mold is basically the same as that of the ordinary rigid PVC pipe. 's mouth mold. When forming the tube blank in the extruded soft PVC pipe material tool, another extruder for forming the rigid PVC thread strip will enter the soft PVC pipe blank from the rotating mouth side in the composite PVC melt strip. Inside,
Due to the rotation, the rigid PVC strip is wound around the soft PVC tube blank, and at the same time moves with the moving tube blank. Since the soft PVC melt with a large flow is affected by the pressure in the forming mold, it moves forward. When there is no soft PVC melt in front of the exit mold, the hard
The tube blank is extruded from the die to form a spiral tube. PVC spiral strip is fully contained, forming complete rigid PVC spiral soft PVCR
(3 The mixing of raw materials for B-enhanced PV soft seed products should be carried out in two high-speed mixers respectively. The production operation method and raw material mixing process temperature should be consulted with the mixing process of ordinary hard and soft PVC materials.
The degree and operation method are exactly the same.
The plasticizing temperature of the two extruders extruding the raw materials of the two products into a molten state and the molding temperature in the mold are the same as the plastic process temperature of the extruder extruding ordinary hard and soft PVC products. Production can refer to ordinary PVC rigid, hose forming process temperature
condition to debug.
(4) Key points of process operation
①The extruded melt of the hard and soft PVC products used in the composite molding of the rigid PVC spiral reinforced PVC hose should match the amount of the molding material. The rotation speed of the extruder screw for extruding rigid PVC strips should be coordinated with the flow rate of extruding soft PVC melt forming tube blanks and the corresponding rigid V and soft VC blanks.
②The rotor is electric and electric) is driven by the chain drive after being decelerated by the reduction box, and the rotation speed of the die is adjustable. When adjusting the speed of the die, it should be adjusted according to the size of the winding pitch of the rigid PVC strip. When working, the rotation speed of the die should be stable.
③The inner surface of the rotating die is provided with a semi-circular spiral groove, which is used to form the outer spiral of the reinforcing tube. The depth of this semi-circular spiral groove should be determined by the wall thickness of the pipe and the diameter of the rigid PVC spiral. It is necessary to ensure that the soft PVC melt can fully contain the rigid PVC strip and the outer spiral material of the forming pipe.
The rigid PVC inner thread muffler tube is cooled and cooled to quickly reduce or stop the foaming process of the core layer foam. The impact of the inner wall of the pipe, together with the air in the mixed fluid, can be discharged smoothly, reducing the noise generated by the drainage in the pipe. The drainage flow noise of the spiral muffler pipe can reduce the interference of daily life by 8~10dB. Compared with the ordinary rigid PVC drainage pipe, the structure of the rigid polyvinyl chloride inner spiral muffler pipe is different from that of the ordinary rigid polyvinyl chloride drainage pipe, except that the inner wall of the pipe has a spiral rib with a triangular cross-section. , shown in 5-35.
The inner spiral section of the rigid PVC inner spiral is 23mm in height and 50mm in pitch. The wall structure can be solid with equal thickness. Figure 5-35 Solid wall PVC spiral is a foam sandwich structure with a core layer. The inner wall structure of the muffler pipe The rigid PVC inner spiral muffler pipe can reduce the noise of the water flow when conveying water. The spiral protruding triangular ribs in the pipe can force the water flow to rotate and flow down along the inner wall of the pipe, which regulates the direction of the body flow, thereby The collision between the water flow and the air in the pipe is reduced, and the purpose of reducing the noise caused by the flow is achieved.
(1) The extrusion molding of the rigid PVC inner spiral muffler pipe is exactly the same as the extrusion molding material of the rigid PVC pipe, which can be produced by referring to the formula of 5.41.
(2) Equipment conditions for extrusion molding of rigid PVC inner spiral muffler pipe
The A-type production process route is the same as the PVC drainage pipe type production equipment and production process route, the difference is that the structure of the pipe forming mold is slightly different. As shown in Figure 5-36, the mold structure for pipe forming is a 90-degree straight line between the center line of the mold and the center line of the extruder for raw materials. During production, there is a mandrel in the mold body that can rotate under the drive of the transmission sprocket. On the outer surface of the mandrel that can rotate, there are six uniformly distributed, equal-guaranteed three layers. When the molten material in the mold is extruded from here to form the tube blank, the continuously rotating core boundary is formed.
1- Mould; 2- Rotating mandrel; 3- Sealing ring; 4- Moulding cover; 5- Pressing purple screw taper field 6- Drive shaft; 7- Fixed mandrel; 8- Mould body; 9- Melt inlet; 10 a sprocket;
11, 13-ball bearing; 12-adjusting screw
The sprocket on the molding die body is decelerated by the commutator motor (or DC motor) through the reduction box, and then driven by the chain.
(3) Key points of process operation
① The extrusion molding process conditions (material formula, raw material compounding method and extrusion process temperature) of the rigid PVC inner spiral muffler pipe can be completely produced according to the extrusion molding process of the rigid PVC sewage pipe.
②When designing the mold structure, pay attention that the length of the triangular groove section should be slightly longer than the length of the mold mandrel for ordinary rigid PVC pipes, but the longest should not exceed 10mm, and the depth of the triangular groove should be 2.5~3mm; The rotational speed n is calculated from the linear speed v of the extruded tube blank, the helix angle a of the spiral rib and the inner diameter d of the tube formed by the mandrel, n=vtana/πd. High temperature resistant graphite or polytetrafluoroethylene can be used for foot resistance, and attention should also be paid to these two phases.
The gap between moving parts should be able to be adjusted at any time. 5.4.10 Rigid PVC Spiral Reinforced PVC Hose
Rigid polyvinyl chloride spiral reinforced soft PVC
Type reinforced pipe, its structure is shown in Figure 5-37, because there is a rigid PVC element in the PVC hose
The strip spiral is used as the skeleton, thereby improving the rigidity and working strength of the dream PVC pipe. Soft spiral reinforced PVC
Such pressure liquid, in addition, this tube also has resistance to
Rotary reinforced PVC hose structure 1-rigid PVC spiral strip;
Corrosion, easy to bend and so on. in some areas
2 a soft PVC pipe wall
It can replace rubber pipes or steel pipes to transport liquid gases and granular solids; it can also replace metal
The hose is used as the cable sheath in the electromechanical equipment, etc.
(1) The raw material is selected from the rigid PVC spiral strip forming material formula and the soft PVC pipe forming material formula in the rigid PVC spiral reinforced soft PVC pipe. You can refer to the materials used for rigid PVC products. Formulation and formulation design of soft PVC pipe forming materials
The reference formulations for forming the two articles in the tube are as follows.
Formulation of soft PVC transparent pipe forming materials (parts by mass):
Polyvinyl chloride (PVC SG4) 100 Dibutyltin dilaurate (C102)
Dioctyl Phthalate (DOP) 60 Epoxidized Soybean Oil (ESO) 1.5
Dioctyl Adipate (DOA) 6.5 Paraffin 3.5
Barium cadmium zinc liquid stabilizer 0.8 0.25
Rigid PVC spiral strip material formula (parts by mass): polyvinyl chloride (PVC SG6)
100 barium stearate (BaSt)
Tribasic lead sulfate (3PbO)
1.5 Lead stearate (PbSt) 1.5
-330- Dibasic lead phosphite (2PbO) 1.5 Chlorinated polyethylene (CPE) 0.7 5.0
The 5th meter plastic pipe is the best
1.2 Light calcium carbonate (CaCO;)
River baked British resin CACR-401)
0.5 Titanium dioxide (TO:) 10
0.5 1.5
Household Acid(HS:)
(2) For the extrusion molding of ethylene-reinforced PVC, since the product is formed by compounding two kinds of PVC products with different properties, the different formula materials of the two products are mixed in two mixers, and then
At one time, it was plasticized and melted in two extruders respectively. The extruded molten material is respectively extruded from the two mouths of the forming die into the die for forming the rigid polyvinyl chloride spiral reinforced PVC hose to synthesize the tube blank. The specifications of the two extruders are selected, because the size of the extruder for soft PVC material is larger than that of the extruder for extruding rigid V and soft VC when forming the composite pipe. The structure of the screw is exactly the same. Rigid PVC Spiral Reinforced Knot 5
Figure 5-38 Mold structure for rigid PVC spiral reinforced PVC hose molding Rotary die; 8-die rotary positioning sleeve A-soft PVC melt inlet; B-hard PVC melt inlet
It can be seen from the structure diagram of the forming mold of the reinforced soft PVC pipe that the structure of this composite mold is basically the same as that of the ordinary rigid PVC pipe. 's mouth mold. When forming the tube blank in the extruded soft PVC pipe material tool, another extruder for forming the rigid PVC thread strip will enter the soft PVC pipe blank from the rotating mouth side in the composite PVC melt strip. Inside,
Due to the rotation, the rigid PVC strip is wound around the soft PVC tube blank, and at the same time moves with the moving tube blank. Since the soft PVC melt with a large flow is affected by the pressure in the forming mold, it moves forward. When there is no soft PVC melt in front of the exit mold, the hard
The tube blank is extruded from the die to form a spiral tube. PVC spiral strip is fully contained, forming complete rigid PVC spiral soft PVCR
(3 The mixing of raw materials for B-enhanced PV soft seed products should be carried out in two high-speed mixers respectively. The production operation method and raw material mixing process temperature should be consulted with the mixing process of ordinary hard and soft PVC materials.
The degree and operation method are exactly the same.
The plasticizing temperature of the two extruders extruding the raw materials of the two products into a molten state and the molding temperature in the mold are the same as the plastic process temperature of the extruder extruding ordinary hard and soft PVC products. Production can refer to ordinary PVC rigid, hose forming process temperature
condition to debug.
(4) Key points of process operation
①The extruded melt of the hard and soft PVC products used in the composite molding of the rigid PVC spiral reinforced PVC hose should match the amount of the molding material. The rotation speed of the extruder screw for extruding rigid PVC strips should be coordinated with the flow rate of extruding soft PVC melt forming tube blanks and the corresponding rigid V and soft VC blanks.
②The rotor is electric and electric) is driven by the chain drive after being decelerated by the reduction box, and the rotation speed of the die is adjustable. When adjusting the speed of the die, it should be adjusted according to the size of the winding pitch of the rigid PVC strip. When working, the rotation speed of the die should be stable.
③The inner surface of the rotating die is provided with a semi-circular spiral groove, which is used to form the outer spiral of the reinforcing tube. The depth of this semi-circular spiral groove should be determined by the wall thickness of the pipe and the diameter of the rigid PVC spiral. It is necessary to ensure that the soft PVC melt can fully contain the rigid PVC strip and the outer spiral material of the forming pipe.
Author：admin