阅读说明：本技术 一种pvc-o管材多级温控加工成型装置及加工方法 (Multistage temperature control machining forming device and machining method for PVC-O pipe ) 是由 赵正平 沈思涛 陈枫 钟明强 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种PVC-O管材多级温控加工成型装置,包括挤出机、冷却装置、牵引装置及扩展芯模,挤出机机头右侧设有第一冷却装置,第一冷却装置靠近挤出机机头的一端设有定径套,第一冷却装置另一侧设有第一牵引装置,第一牵引装置远离第一冷却装置的一端设有扩展芯模,扩展芯模位于水槽内,水槽由隔热板分隔为Ⅰ区、Ⅱ区、Ⅲ区三个区域,扩展芯模内部为空芯结构,扩展芯模通过隔热板分隔有第一圆柱体、圆锥体及第二圆柱体,扩展芯模内部设有空心连杆,扩展芯模通过空心连杆与挤出机机头连接,扩展芯模远离第一牵引装置的一端设有第二冷却装置,第二冷却装置远离扩展芯模一端设有第二牵引装置。本发明解决了管材壁厚不均匀的问题,保证了管坯质量。(The invention discloses a multistage temperature control processing and forming device for PVC-O pipes, which comprises an extruder, a cooling device, a traction device and an expansion core die, wherein the right side of the extruder head is provided with a first cooling device, one end of the first cooling device, which is close to the extruder head, is provided with a sizing sleeve, the other side of the first cooling device is provided with the first traction device, one end of the first traction device, which is far away from the first cooling device, is provided with the expansion core die, the expansion core die is positioned in a water tank, the water tank is divided into a region I by a heat insulation plate, the expansion core mold is internally provided with a hollow structure, the expansion core mold is separated into a first cylinder, a cone and a second cylinder through a thermal insulation plate, a hollow connecting rod is arranged inside the expansion core mold, the expansion core mold is connected with the extruder head through the hollow connecting rod, one end of the expansion core mold, which is far away from the first traction device, is provided with a second cooling device, and one end of the second cooling device, which is far away from the expansion core mold, is provided with a second traction device. The invention solves the problem of uneven wall thickness of the pipe and ensures the quality of the pipe blank.)

1. The utility model provides a multistage control by temperature change machine-shaping device of PVC-O tubular product, includes extruder (1), cooling device, draw gear and extension mandrel (11), its characterized in that: the cooling device comprises a first cooling device (3) and a second cooling device (8), the traction device comprises a first traction device (4) and a second traction device (9), the first cooling device (3) is arranged on the right side of the head of the extruder (1), one end, close to the head of the extruder (1), of the first cooling device (3) is provided with a sizing sleeve (16), the other side of the first cooling device (3) is provided with the first traction device (4), one end, far away from the first cooling device (3), of the first traction device (4) is provided with an expansion core mold (11), the expansion core mold (11) is located in the water tank (6), the water tank (6) is divided into three areas, namely an area I, an area II and an area III by a heat insulation plate, the temperature of water in the area I of the water tank (6) is 60-70 ℃, the temperature of water in the area II of the water tank (6) is 95-98 ℃, the temperature of water in the III area of the water tank (6) is 15-20 ℃, the interior of the expansion core mold (11) is of a hollow structure, the expansion core mold (11) comprises a first cylinder (12), a cone (7) and a second cylinder (10), the first cylinder (12), the cone (7) and the second cylinder (10) are separated through a heat insulation plate, part of the first cylinder (12) is located in the I area of the water tank (6), the cone (7) and part of the first cylinder (12) are located in the II area of the water tank (6), the second cylinder (10) is located in the III area of the water tank (6), a hollow connecting rod (15) is arranged inside the expansion core mold (11), the expansion core mold (11) is connected with the machine head of the extruder (1) through the hollow connecting rod (15), the hollow connecting rod (15) is fixed through a machine head shunting shuttle (2) and is communicated with an external hot water source at 95-98 ℃, and a second cooling device (8) is arranged at one end, far away from the first traction device (4), of the expansion core mold (11), and a second traction device (9) is arranged at one end, far away from the expansion core mold (11), of the second cooling device (8).

2. The multistage temperature control machining and forming device for the PVC-O pipes as claimed in claim 1, wherein an O-shaped sealing ring is embedded on the outer surface of the first cylinder (12) at the junction of the I area and the II area of the water tank (6), and an O-shaped sealing ring is embedded on the outer surface of the cone (7) at the junction of the II area and the III area of the water tank (6).

3. The multistage temperature control machining and forming device for the PVC-O pipe according to claim 1, wherein the outer surface of the cone (7) is provided with grooves (20) which are distributed longitudinally, and circular holes (19) which penetrate through the inner wall and the outer wall of the cone (7) are formed in the grooves (20).

4. The multistage temperature control machining and forming device for the PVC-O pipe according to claim 1, wherein a water inlet pipe (17) and a water outlet pipe (18) which are communicated with the inside of the expansion core die (11) are arranged in the hollow connecting rod (15), the opening of the water inlet pipe (17) is positioned at one end of the first cylinder (12) close to the cone (7), and the opening of the water outlet pipe (18) is positioned at one end of the cone (7) close to the second cylinder (10).

5. The multistage temperature control machining and forming device for the PVC-O pipes as claimed in claim 1, wherein the first traction device (4) comprises a rubber block (13) and a crawler (14), and the rubber block (13) is fixedly installed on the crawler (14).

6. The processing method of the multistage temperature control processing and forming device for the PVC-O pipe according to any one of claims 1 to 5, wherein a pipe blank (5) is extruded from a nose of the extruder (1), the pipe blank (5) enters the first cooling device (3) through a sizing sleeve (16) for cooling and forming, the pipe blank (5) is sent into the water tank (6) through traction of the first traction device (4), the pipe blank (5) is heated gradually through the I area, the II area and the III area of the water tank (6), the pipe blank (5) completes radial stretching through the cone (7) and axial stretching under the action of the second traction device (9), and the pipe blank (5) enters the second cooling device (8) for cooling and forming after passing through the extension core mold (11).

Technical Field

The invention relates to the field of PVC-O pipe processing equipment, in particular to a multistage temperature control processing forming device and a processing method for a PVC-O pipe.

Background

The PVC-O pipe is a latest evolution form of PVC pipes, is manufactured by a special orientation processing technology, is generally subjected to axial stretching and radial stretching by adopting a PVC-U pipe produced by an extrusion method, so that long-chain molecules in the pipe are subjected to biaxial orientation regular arrangement, and a novel PVC pipe with high strength, high toughness, high impact resistance and fatigue resistance is obtained.

The production process of the PVC-O pipe is mainly divided into a one-step method and a two-step method, the production efficiency of the PVC-O pipe produced by the two-step method is low, the heating uniformity of a pipe blank heating device and heating is difficult to control, the uniformity degree and tolerance of the wall thickness in the expansion process are also difficult to control, the rejection rate is high, and the orientation degree of the produced pipe is difficult to guarantee. The PVC-O pipe obtained by the existing one-step production process has the problem of uneven wall thickness, and the use strength of the pipe is seriously influenced.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides a multistage temperature control processing and forming device and a processing method for a PVC-O pipe.

The technical scheme adopted by the invention for solving the technical problems is as follows: a PVC-O pipe multistage temperature control processing and forming device comprises an extruder, a cooling device, a traction device and an expansion core mold, wherein the cooling device comprises a first cooling device and a second cooling device, the traction device comprises a first traction device and a second traction device, the first cooling device is arranged on the right side of an extruder head, a sizing sleeve is arranged at one end, close to the extruder head, of the first cooling device, the first traction device is arranged on the other side of the first cooling device, the expansion core mold is arranged at one end, far away from the first cooling device, of the first traction device, the expansion core mold is located in a water tank, the water tank is divided into three areas, namely an area I, an area II and an area III by a thermal insulation plate, the temperature of water in the area I of the water tank is 60-70 ℃, the temperature of water in the area II of the water tank is 95-98 ℃, the temperature of water in the area III of the water tank is 15, the extension mandrel is internally provided with a hollow structure, the extension mandrel comprises a first cylinder, a cone and a second cylinder, the first cylinder, the cone and the second cylinder are separated by a heat insulation plate, the first cylinder is positioned in the first water tank area I, the cone and part of the first cylinder are positioned in the second water tank area II, the second cylinder is positioned in the third water tank area III, a hollow connecting rod is arranged inside the extension mandrel, the extension mandrel is connected with the extruder head through the hollow connecting rod, the hollow connecting rod is fixed through the head shunting shuttle and is communicated with an external hot water source at 95-98 ℃, one end, far away from the first traction device, of the extension mandrel is provided with a second cooling device, and one end, far away from the extension mandrel, of the second cooling device is provided with a second traction device.

The multistage temperature control processing and forming device for the PVC-O pipes is characterized in that an O-shaped sealing ring is embedded in the outer surface of the first cylinder at the junction of the first area and the second area of the water tank, and an O-shaped sealing ring is embedded in the outer surface of the cone at the junction of the second area and the third area of the water tank.

According to the multistage temperature control processing and forming device for the PVC-O pipe, the outer surface of the cone is provided with the grooves which are longitudinally distributed, and the grooves are internally provided with the circular holes which penetrate through the inner wall and the outer wall of the cone.

In the multistage temperature control processing and forming device for the PVC-O pipe, the hollow connecting rod is internally provided with the water inlet pipeline and the water outlet pipeline which are communicated with the inside of the expansion core mold, the opening of the water inlet pipeline is positioned at one end of the first cylinder, which is close to the cone, and the opening of the water outlet pipeline is positioned at one end of the cone, which is close to the second cylinder.

The multistage temperature control processing and forming device for the PVC-O pipe comprises a first traction device and a second traction device, wherein the first traction device comprises a rubber block and a crawler belt, and the rubber block is fixedly arranged on the crawler belt.

According to the processing method of the multistage temperature control processing and forming device for the PVC-O pipes, the pipe blank is extruded by the extruder head, the pipe blank enters the first cooling device through the sizing sleeve to be cooled and formed, the pipe blank is sent into the water tank through the traction of the first traction device, the pipe blank is heated gradually through the I area, the II area and the III area of the water tank respectively, the pipe blank completes radial stretching through the cone and axial stretching under the action of the second traction device, and the pipe blank enters the second cooling device to be cooled and formed after passing through the extension core mold.

The pipe blank expanding core mould has the advantages that the arrangement of the rubber block on the first traction device improves the traction force and is beneficial to the pipe blank to pass through the expanding core mould more quickly; the expansion core mould is placed in a water tank provided with three temperature intervals to realize gradual heating of the pipe blank, and hot water is introduced into the expansion core mould to realize simultaneous heating inside and outside the pipe blank, so that the heating is sufficient, the expansion effect of the pipe blank is good, and the wall thickness of the pipe blank is stable and uniform; the circular holes are formed in the conical part of the expansion core die, and a layer of water film is formed on the conical part, so that the passing resistance of the tube blank is reduced, the quality of the tube blank is ensured, and the use strength of the tube is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the sink and expansion mandrel of the present invention;

figure 3 is a cross-sectional view of the extended mandrel cone of the present invention.

In the figure, 1, an extruder, 2, a shunt shuttle, 3, a first cooling device, 4, a first traction device, 5, a pipe blank, 6, a water tank, 7, a cone, 8, a second cooling device, 9, a second traction device, 10, a second cylinder, 11, an expansion core mold, 12, a first cylinder, 13, a rubber block, 14, a crawler belt, 15, a hollow connecting rod, 16, a sizing sleeve, 17, a water inlet pipeline, 18, a water outlet pipeline, 19, a round hole and 20 grooves are arranged.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

A PVC-O pipe multistage temperature control processing and forming device comprises an extruder 1, a cooling device, a traction device and an expansion core die 11, wherein the cooling device comprises a first cooling device 3 and a second cooling device 8, the traction device comprises a first traction device 4 and a second traction device 9, the first cooling device 3 is arranged on the right side of a machine head of the extruder 1, a sizing sleeve 16 is arranged at one end, close to the machine head of the extruder 1, of the first cooling device 3, the first traction device 4 is arranged on the other side of the first cooling device 3, an expansion core die 11 is arranged at one end, far away from the first cooling device 3, of the first traction device 4, the expansion core die 11 is positioned in a water tank 6, the water tank 6 is divided into three areas I, II and III by a heat insulation plate, the temperature of water in the I area of the water tank 6 is 60-70 ℃, the temperature of water in the II area of the water tank 6 is 95-98 ℃, the temperature of water in the water tank 6 III area is 15-20 ℃, the interior of the expansion core mold 11 is of a hollow structure, the expansion core mold 11 comprises a first cylinder 12, a cone 7 and a second cylinder 10, the first cylinder 12, the cone 7 and the second cylinder 10 are separated by a heat insulation board, part of the first cylinder 12 is positioned in the water tank 6I area, the cone 7 and part of the first cylinder 12 are positioned in the water tank 6 II area, the second cylinder 10 is positioned in the water tank 6 III area, a hollow connecting rod 15 is arranged in the expansion core mold 11, the expansion core mold 11 is connected with the machine head of the extruder 1 through the hollow connecting rod 15, the hollow connecting rod 15 is fixed by a machine head shunting shuttle 2 and is communicated with an external hot water source with the temperature of 95-98 ℃, a second cooling device 8 is arranged at one end, far away from the first traction device 4, of the expansion core mold 11, the end of the second cooling means 8 remote from the expansion plug 11 is provided with a second traction means 9.

Furthermore, the outer surface of the first cylinder 12 at the junction of the first area and the second area of the water tank 6 is embedded with an O-shaped sealing ring, and the outer surface of the cone 7 at the junction of the second area and the third area of the water tank 6 is embedded with an O-shaped sealing ring.

Furthermore, the outer surface of the cone 7 is provided with grooves 20 which are distributed longitudinally, and circular holes 19 which run through the inner wall and the outer wall of the cone 7 are formed in the grooves 20.

Further, a water inlet pipe 17 and a water outlet pipe 18 which are communicated with the inside of the expansion core mold 11 are arranged in the hollow connecting rod 15, an opening of the water inlet pipe 17 is positioned at one end of the first cylinder 12 close to the cone 7, and an opening of the water outlet pipe 18 is positioned at one end of the cone 7 close to the second cylinder 10.

Further, the first traction device 4 comprises a rubber block 13 and a track 14, and the rubber block 13 is fixedly installed on the track 14.

The processing method of the multistage temperature control processing and forming device for the PVC-O pipe comprises the following steps: the pipe blank 5 is extruded from the head of the extruder 1, the pipe blank 5 enters the first cooling device 3 through the sizing sleeve 16 for cooling and shaping, the pipe blank 5 is sent into the water tank 6 through the traction of the first traction device 4, the pipe blank 5 is heated gradually through the I area, the II area and the III area of the water tank 6 respectively, the pipe blank 5 completes the axial stretching under the action of the second traction device 9 while completing the radial stretching through the cone 7, and the pipe blank 5 enters the second cooling device 8 for cooling and shaping after passing through the extension core mold 11. The rubber block 13 can improve the traction force to help the tube blank 5 enter the extension core mold 11, hot water can be conveyed into the extension core mold 11 through the water inlet pipeline 17 in the hollow connecting rod 15 and flows out through the round hole 19 at the front end of the cone 7 and flows in through the round hole 19 at the rear end of the cone 7 and flows back through the water outlet pipeline 18, the O-shaped sealing rings on the surface of the extension core mold 11 ensure that the hot water can only flow out and flow back in the area between the two sealing rings, circulation is realized, a layer of water film is formed on the surface of the cone 7 of the extension core mold 11, and the resistance of the tube blank 5 passing through the extension core mold 11.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.