CN114347424A

CN114347424A - PVC pipe forming and cutting system and forming and cutting method thereof

Info

Publication number: CN114347424A
Application number: CN202210009105.8A
Authority: CN
Inventors: 徐爱芳; 姜渭龙; 吴新华
Original assignee: Zhejiang Longcai Plastic Industry Co ltd
Current assignee: Jiangxi Lihe Pipe Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-04-15
Anticipated expiration: 2042-01-06
Also published as: CN114347424B

Abstract

The invention relates to a forming and cutting system and a forming and cutting method of a PVC pipe, which are characterized in that: the method comprises the following steps: a forming assembly having at least a forming cavity for receiving raw material extruded by the extruder; the cutting device is arranged at the output end of the forming assembly and is used for cutting the pipe discharged from the forming cavity; the forming assembly at least comprises an outer sleeve and an inner core, the forming cavity is formed between the outer sleeve and the inner core, the inner core is formed by sleeving a plurality of sub inner cores, and the cavity diameter of the forming cavity can be enlarged by taking out the corresponding sub inner cores, so that the forming assembly has the advantages that: the effective cavity diameter of the forming cavity can be changed by changing the section diameter of the inner core, so that pipes of different specifications can be produced.

Description

PVC pipe forming and cutting system and forming and cutting method thereof

Technical Field

The invention relates to the field of pipe production, in particular to a forming and cutting system and a forming and cutting method for a PVC pipe.

Background

The drain pipe is a pipe (or pipeline) which is named as a drain pipe because the pipe is used for draining water, and the production efficiency is influenced because the pipe is cooled slowly and the cutting cannot be automated in the forming process at present;

secondly, the existing production regulation of the pipe has certain defects, and because the pipe needs to be discharged from the output end of the existing pipe forming cavity, most of the pipe is arranged in an open mode, so that impurities enter the forming cavity during forming to influence the production quality of the pipe;

moreover, at present, the forming device of the pipe can only produce the pipe with one specification, so the diversity is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a forming and cutting system and a forming and cutting method for a pvc pipe, and aims to solve the problems in the background art.

The technical scheme of the invention is realized as follows: the utility model provides a shaping cutting system of pvc tubular product which characterized in that: the method comprises the following steps:

a forming assembly having at least a forming cavity for receiving raw material extruded by the extruder;

the cutting device is arranged at the output end of the forming assembly and is used for cutting the pipe discharged from the forming cavity;

the forming assembly at least comprises an outer sleeve and an inner core, the forming cavity is formed between the outer sleeve and the inner core, the inner core is formed by sleeving a plurality of sub inner cores, and the cavity diameter of the forming cavity can be enlarged by taking out the corresponding sub inner cores.

Preferably: the inner core includes:

the main inner core and a plurality of the sub inner cores;

the fixing component can be detached from the main inner core and used for fixing different sub inner cores;

wherein the fixing member includes:

the main bolt consists of a bolt part and a bolt head, an inner threaded cavity matched with the main bolt is arranged on the main inner core, and threads are arranged on the outer wall of the bolt head;

the diameter of the plurality of fixing rings gradually becomes larger, the inner wall and the outer wall of each fixing ring are respectively provided with threads matched with each other, the fixing rings can be in threaded connection with each other, and the fixing ring with the smallest diameter can be in threaded connection with the bolt head.

By adopting the technical scheme:

the invention realizes the production of pipes with different thick walls by arranging the special inner core (the diameter of the inner core can be changed by detaching the sub inner core) to change the cavity diameter (effective cavity diameter, namely the distance between the inner side wall of the outer sleeve and the outer side wall of the inner core) of the cavity.

Preferably: further comprising:

the cooling cavity is arranged in the jacket, extends in the production direction and has one end penetrating through one end of the jacket;

a cooling source for supplying a cooling liquid to the cooling chamber;

the cutting device is arranged at the free end of the outer sleeve and at least provided with more than three blades, and the blades can be controlled by the driving component to drive the output end for closing or opening the forming cavity, the output end for closing or opening the cooling cavity and the pipe discharged from the forming cavity to be cut;

the cooling liquid discharged from the cooling cavity can clean the pipe discharged from the forming cavity.

By adopting the technical scheme:

in order to improve the production efficiency of the pipe, the outer sleeve is provided with the cooling cavity, and the cooling effect of the pipe in the forming cavity can be accelerated through cooling liquid in the cooling cavity, so that the production efficiency is improved, and moreover, the cutting device can be used for cutting the pipe after the pipe is discharged out of the pipe head, so that the production automation is improved, and the blade of the cutting device can also be used as a sealing structure, namely: when the pipe is not discharged from the pipe head before forming, the output end of the forming cavity is sealed by the blade, so that impurities are prevented from entering, and the quality of the pipe is improved.

Preferably: the cutting device includes:

the blades are rotatably connected with the free end part of the outer sleeve through a rotating shaft, the hinged points of the blades are distributed at equal intervals along the circumferential direction of the inner core, the blades can be mutually spliced to seal the forming cavity, and the pipe discharged from the forming cavity is cut off in the closing process;

the annular driving piece is coaxially arranged with the inner core and can be controlled by the driver to rotate in the positive direction or in the reverse direction;

the support shafts are circumferentially distributed at equal intervals by taking the inner core as a standard, the annular driving piece is provided with a plurality of arc-shaped movable areas, each support shaft moves in each arc-shaped movable area, and the length of each arc-shaped movable area determines the range of forward rotation or reverse rotation of the annular driving piece;

the linkage shafts of each pair of linkage shafts are respectively arranged on the circumferential angles of the annular driving piece and the blade, and a linkage piece is arranged between the linkage shafts;

when the driver drives the annular driving piece to rotate in the positive direction, the blades are spliced with each other;

when the driver drives the annular driving piece to reversely rotate, the blades are far away from each other.

Preferably: the blade includes:

the sheet body at least comprises a circumferential angle for mounting the universal driving shaft, a central angle spliced with other sheet bodies and a fixed angle rotationally connected with the outer sleeve;

a first blade formed between the central angle and the circumferential angle;

a second blade formed between the central angle and a fixed angle;

wherein, first cutting edge and second cutting edge can splice each other to when the output that the second cutting edge part sheltered from or sheltered from the cooling chamber entirely, the coolant liquid of following the cooling chamber exhaust can be reflected by the second cutting edge and spout to the tubular product that discharges into the die cavity on, partial coolant liquid can be sprayed and can give the rotatory power of tubular product with the direction tangent with the tubular product outer wall.

By adopting the technical scheme:

the cutting device provided by the invention can be used as a closed structure and a cutting structure at the same time, namely: the cutting device has at least two states, wherein the first state is that the driver controls the annular driving piece to rotate in the positive direction and drives the blades to be spliced with each other, the blades are provided with a first cutting edge and a second cutting edge, the two cutting edges can be spliced with each other to form a closed structure for closing a forming cavity (a material discharging cavity in other embodiments, the following states are the same), the second state is that the driver controls the annular driving piece to rotate in the reverse direction and drives the blades to be separated from each other to open the forming cavity, when a pipe is exposed, the annular driving piece is controlled to rotate in the positive direction, and when the blades are spliced with each other, the pipe is cut; and when the blade separates, can control the second cutting edge just to shelter from the output of cooling chamber (under this state, the coolant liquid can normally discharge, but the coolant liquid of discharging can strike the second cutting edge and be reflected by the second cutting edge), the power that the tubular product was rotatory can be given to the coolant liquid of reflection (this effect can cooperate other embodiments, is convenient for discharge tubular product).

Preferably: the jacket includes:

the sleeve body is provided with an inner cavity, the inner cavity is used for accommodating the inner core, the length of the inner cavity is greater than that of the inner core, the forming cavity is formed between the inner cavity and the inner core, a discharge cavity is formed in the part of the inner cavity without the inner core, and the cooling cavity is formed inside the sleeve body;

the cutting cavity is concavely arranged on the inner wall of the sleeve body, is communicated with the cooling cavity and is positioned at the intersection of the discharging cavity and the forming cavity;

the cut-off valve plate is connected with a piston shaft, and one end of the piston shaft penetrates out of the sleeve body;

the first electromagnetic assembly at least comprises a shell for the piston shaft to move, a first electromagnet is arranged at the bottom of the shell, and a return spring is connected between the inner cavity of the shell and the piston shaft;

when the first electromagnet is electrified and the current is a, the first electromagnet generates magnetism and attracts the piston to move in the direction of axially approaching the shell, and each cut-off valve plate is controlled to be completely positioned in the cut-off cavity;

when the first electromagnet is electrified and the current is b, b is less than a, the first electromagnet generates magnetism and attracts the piston to move a part of distance in the direction of axially approaching the shell, and each cut valve plate is controlled to be positioned outside the cut cavity and generates a cutting mark on the surface of the pipe;

when the first electromagnet is powered off, the first electromagnet loses magnetism, the reset spring pushes the piston to move towards the direction far away from the shell, and the cutoff valve plate cuts off the inside of the forming cavity and opens the communication part of the cooling cavity and the cutoff cavity.

Preferably: the cover body comprises:

the first shaft body is used for accommodating the inner core, forming a forming cavity together with the inner core and forming the cooling cavity on the first shaft body;

the opening area is arranged on the first body and communicated with the head end of the discharging cavity to form the intercepting cavity;

the second shaft body is positioned in the discharge cavity and can be controlled by the driver to move relative to the first shaft body, one end, far away from the inner core, of the second shaft body is fixedly connected with a substrate, the substrate is used for mounting the cutting device, jet ports corresponding to the cavity openings of the cooling cavities are arranged on the substrate, the jet ports are communicated with the cooling cavities through jet pipes, the jet pipes can be arranged in a sliding mode with the cooling cavities, and when the second shaft body moves, the second shaft body can be used for closing or opening the opening area.

By adopting the technical scheme:

the length of the outer sleeve is set to be larger than that of the inner core, so that a forming cavity (the forming cavity is between the outer sleeve and the inner core) and a discharging cavity (the inner core is not contained in the discharging cavity, and the formed pipe in the forming cavity is discharged);

in the invention, in order to ensure the forming effect in the forming cavity, the forming time is prolonged in the invention, when the extruder extrudes the material into the forming cavity, the first electromagnet is powered off, the forming cavity and the discharge cavity are sealed by using the cut-off valve plate, at the moment, the pipe can be fully formed in the forming cavity, after the forming, the first electromagnet is powered on (the current is a), the cut-off valve plate is completely opened, the extruder extrudes the material again, after the pipe groove in the forming cavity is pushed into the discharge cavity, the first electromagnet is powered off, the cut-off valve plate seals the forming cavity again, at the moment, the pipe in the forming cavity is not completely cooled, therefore, when the cut-off valve plate is cut off, the pipe in the discharge cavity cannot be damaged, the forming of the pipe in the forming cavity cannot be influenced, the pipe can only form 'residue' at one end of the pipe (after the pipe is discharged, the pipe can be sent into the extruder again for recycling, the residue section is formed in the forming cavity, and because one end of the pipe is sealed, impurities can be prevented from entering before cutting, and after cutting, the cooling cavity drains water, and a cutting area can be dusted, so that the impurities are prevented from entering the pipe and being adsorbed in the pipe in a large amount, a large amount of impurities can cause cleaning burden to follow-up and influence the packaging and weighing precision);

therefore, the invention can realize independent separation of material discharge and forming without conflict between the material discharge and the forming, thereby improving the production efficiency on the premise of ensuring the production quality.

Preferably: the cutoff valve sheet includes:

the cutting body is used for cutting off the pipe and can be used for sealing the output end of the forming cavity;

a boost cavity formed in the truncated body;

the cleaning cavity is formed in the cut-off body and communicated with the boosting cavity through a transition port;

the liquid inlet pipeline is formed in the cut-off body, the input end of the liquid inlet pipeline penetrates through one end, close to the cut-off cavity, of the cut-off body and is used for cooling liquid to enter, at least two output ends are arranged on the liquid inlet pipeline, and each output end of the liquid inlet pipeline is communicated with the cleaning cavity;

the liquid outlet pipeline is formed in the cut-off body, at least two input ends of the liquid outlet pipeline are respectively communicated with the boosting cavity and the cleaning cavity, at least two groups of output ends of the liquid outlet pipeline exist, one group of output ends uses the inner core as a center, is circumferentially distributed on one side, close to the cutting device, of the cut-off body at equal intervals, and the other group of output ends is coaxial with the inner core and is arranged on one side, close to the cutting device, of the cut-off body;

the first control body and the second control body can be respectively connected into the boosting cavity and the cleaning cavity through springs, the first control body can be used for sealing one input end of the liquid outlet pipeline of the transition port through the springs, and the second control body can be used for sealing the other input end of the liquid outlet pipeline through the springs;

and the second electromagnetic assembly can attract the first control body to open the transition port when the second electromagnetic assembly is electrified.

Preferably: the output that goes out the liquid pipeline and be located the truncation body center includes:

the dispersed recessed area is recessed on one side of the cut-off body and is coaxial with the inner core;

the liquid inlets are connected with the output end of the liquid outlet pipeline, and the liquid outlet pipeline can spray cooling liquid into the dispersing recessed area to be vertical to any radius of the dispersing recessed area;

when the cooling liquid in the liquid outlet pipeline is sent into the dispersion depressed areas, the cooling liquid forms vortex in the dispersion depressed areas and is sprayed out from the output ends of the dispersion depressed areas.

In addition, the invention also provides a forming and cutting method of the pvc pipe, and the forming and cutting system is characterized by comprising the following steps:

a1: fixing the plurality of sub inner cores on the main inner core by using a fixing part, and determining the cavity diameter of the forming cavity;

a2: extruding the material of the pipe by an extruder, and feeding the part of the material into a forming cavity;

a3: the material moves in the molding cavity and is cooled in the molding cavity to form a pipe;

a4: discharging the formed pipe from the output end of the forming cavity, and controlling a cutting device to cut the pipe into pipes with the length meeting the production standard;

when a pipe with a thicker pipe wall is needed, the fixing part can be detached, the corresponding sub inner core is taken out, and the steps A2-A4 are continuously completed after the remaining main inner core and/or sub inner core are fixed.

Preferably: also comprises the following steps:

in the step A2, the cooling source sends the cooling liquid into the cooling cavity, the cooling liquid moves in the jacket and assists in forming and radiating, so that the pipe forming is facilitated, meanwhile, the cooling liquid absorbing heat forms normal-temperature cleaning liquid, the normal-temperature cleaning liquid is discharged from the output end of the cooling cavity, and the pipe and/or the cutting device exposed out of the forming cavity are cleaned.

The processing method also comprises a middle section processing method of the pipe, and comprises a mark cutting step and a cutting step, wherein the mark cutting step comprises the following steps:

s4: when the pipe is normally produced, the first electromagnet is electrified, the current of the first electromagnet is a, so that the first electromagnet generates magnetism, the cut-off valve plate is controlled to completely enter the cut-off cavity, the second shaft is controlled by the driver to close the opening area, and the pipe can be smoothly formed in the forming cavity;

s5: when the cut marks are cut, after the pipe moves from the forming cavity to the discharging cavity, the second shaft body is controlled by the driver to open the opening area, the first electromagnet is powered on, the current is adjusted to be b, the magnetism of the first electromagnet is reduced, the cut valve plate can be partially moved out of the opening area, the cut marks are cut on the surface of the pipe, after the cut marks are cut, the current is adjusted to be a, the magnetism of the first electromagnet is enhanced, and the cut valve plate is controlled to be completely positioned in the opening area, so that the cut marks are cut;

the cutting method comprises the following steps:

s6: after the step S4, the second shaft body is controlled by the driver to open the opening area, the first electromagnet is powered off, so that magnetism is lost, the cut-off valve plate is influenced by the reset spring and completely enters the communication position of the material discharging cavity and the molding cavity, so that the material discharging cavity and the molding cavity are cut off, and at the moment, the pipe in the molding cavity can be fully molded in the molding cavity;

s7: after the cutoff valve plate completely separates the forming cavity and the discharging cavity, the communication part of the cooling cavity and the cutoff cavity is opened, the second electromagnetic assembly is electrified, part of the cooling liquid enters the cutoff cavity and enters the cleaning cavity through the liquid inlet pipeline, part of the cooling liquid in the cleaning cavity enters the boosting cavity through the transition port and is further discharged through the liquid outlet pipeline, the cooling liquid in the boosting cavity is guided to each position on one side of the cutoff body through the liquid outlet pipeline and can be sprayed from different positions, so that one end of the pipe can be subjected to relatively balanced force to ensure that the pipe moves for a certain distance, then, the other part of the cooling liquid in the cleaning cavity jacks up the second control body in the cleaning cavity and opens the other group of input ends of the liquid outlet pipeline, so that the cooling liquid can be guided to the central position of the cutoff body through the liquid outlet pipeline and is sprayed out after generating eddy currents in the dispersion depressed area, the vortex can give the pipe rotatory power, washs the discharge chamber when supplementary pipe removes.

Also included are methods of using the cutting devices, comprising:

s8: in the step A2-step A3, the driver controls the blades to be spliced with each other by using the annular driving piece, and the output end of the forming cavity is sealed, so that impurities are prevented from entering from the output end of the forming cavity;

s9: in step S7, the driver controls the blades to separate from each other by the annular driving member, and opens the output end of the forming cavity, so that the formed pipe can move out, and after the pipe moves out by a distance corresponding to the length, the driver controls the annular driving member again to drive the blades to splice with each other, and cuts the pipe;

when the blades are completely opened and the output end of the cooling cavity is shielded in step S9, the liquid discharged from the cooling cavity can be reflected by the second cutting edges of the blades and sprayed to the pipe to complete the cleaning of the pipe, and the reflected liquid part is tangent to the outer wall of the pipe, so that the pipe can be conveniently moved out.

By adopting the technical scheme:

in the invention, after the cutoff valve plate seals the forming cavity and the discharge cavity, cooling liquid in the cooling cavity can enter the liquid inlet pipeline and be utilized by the boosting cavity and the cleaning cavity, the boosting cavity can push the pipe in the discharge cavity to move, and the cleaning cavity can clean the discharge cavity (mainly waste materials of the cleaning pipe are not adsorbed on the pipe and can be washed away), and the advantages of the part can be detailed in the embodiment part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

FIG. 2 is a schematic view taken along line A in FIG. 1;

FIG. 3 is a schematic structural view of an inner core according to embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 5 is another state diagram of FIG. 4;

FIG. 6 is a schematic view of a blade according to embodiment 3 of the present invention;

FIG. 7 is a schematic diagram of the principle of the second blade for reflecting or guiding the cooling liquid according to embodiment 3 of the present invention;

FIG. 8 is a schematic structural diagram of embodiment 3 of the present invention;

FIG. 9 is a schematic view of another state of FIG. 8;

FIG. 10 is a sectional view A-A of FIG. 8;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 9;

FIG. 12 is a schematic structural view of a check valve plate according to embodiment 3 of the present invention;

FIG. 13 is a schematic illustration of the vortex generation in the discrete recessed areas of the present invention in accordance with exemplary embodiment 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, this embodiment provides a forming and cutting system for pvc pipe, in the embodiment of the present invention: the method comprises the following steps:

a forming assembly having at least a forming cavity 12, the forming cavity 12 being adapted to receive the raw material extruded by the extruder 2;

the cutting device 3 is arranged at the output end of the forming assembly and is used for cutting the pipe discharged from the forming cavity 12;

the forming assembly at least comprises an outer sleeve 10 and an inner core 11, the forming cavity 12 is formed between the outer sleeve 10 and the inner core 11, the inner core 11 is formed by sleeving a plurality of sub inner cores, and the cavity diameter of the forming cavity 12 can be enlarged by taking out the corresponding sub inner cores.

In a specific embodiment of the invention: the inner core 11 includes:

a main core 110 and a plurality of said sub-cores 111;

a fixing member detachably attached to the main core 110 and fixing different sub cores 111;

wherein the fixing member includes:

the main bolt 112 consists of a bolt part and a bolt head, an inner threaded cavity matched with the main bolt is arranged on the main inner core 110, and threads are arranged on the outer wall of the bolt head;

the diameter of the fixing rings 113 is gradually increased, the inner wall and the outer wall of each fixing ring 113 are respectively provided with mutually matched threads, the fixing rings 113 can be mutually in threaded connection, and the fixing ring 113 with the minimum diameter can be in threaded connection with a bolt head.

In this embodiment, the dismantlement of inner core can be realized through taking off corresponding solid fixed ring, for example, there are 2 sub inner cores in this embodiment, main inner core is located inside (the other end of general main inner core is fixed with the extruder), when producing the thin tubular product of tubular product wall, two sub inner cores are corresponding all to assemble, and through fixing one of them solid fixed ring at the bolt head, another solid fixed ring is fixed on preceding solid fixed ring can, when producing the tubular product that the pipe wall is thicker, pull down solid fixed ring, and take out sub inner core, thereby the chamber footpath of shaping chamber has been enlarged to the intention, and then reach the tubular product of producing different specifications.

In a specific embodiment of the invention: tube head 1 (i.e. the forming assembly), can be connected with 2 output of extruder, just tube head 1 comprises overcoat 10 and inner core 11 that extend along the direction of production, form the shaping chamber 12 with 2 intercommunications of extruder between overcoat 10 and the inner core 11, still include:

at least one cooling chamber 20, which is arranged in the jacket 10, extends in the production direction and has one end penetrating through one end of the jacket 10;

a cooling source 21 (which may be a water pump and the cooling fluid may be water) for supplying the cooling fluid to the cooling chamber 20;

the cutting device 3 is arranged at the free end of the outer sleeve 10 and at least comprises more than three blades 30, and the blades 30 can be controlled by a driving component to drive the output end for closing or opening the forming cavity 12, the output end for closing or opening the cooling cavity 20 and the pipe material discharged from the forming cavity 12 to be cut;

the coolant discharged from the cooling cavity 20 is capable of cleaning the tubing discharged from the forming cavity 12.

In a particular embodiment of the invention, the blades 30 of the cutting device 3 may be in the shape of a quarter circle, see fig. 2, and the blades can be controlled to approach or separate from each other by a drive assembly (for example: a pneumatic cylinder).

Referring to fig. 1-3, in this embodiment, the cooling liquid flowing in the cooling cavity can accelerate the cooling efficiency of the pipe in the forming cavity, so as to improve the forming efficiency, and the driving assembly is utilized to control the blades to approach and separate from each other, so as to selectively close or open the forming cavity, close or open the cooling cavity and be used for cutting the pipe, thereby realizing the cutting automation, and simultaneously avoiding impurities from entering the forming cavity during forming.

Example 2, the difference from example 1 is that:

as shown in fig. 4-7, in a specific embodiment of the present invention, the cutting device 3 comprises:

the blades 30 are rotatably connected with the free end part of the outer sleeve 10 through a rotating shaft 31, the hinged points of the blades 30 are distributed at equal intervals along the circumferential direction of the inner core 11, the blades 30 can be mutually spliced to seal the forming cavity 12, and a pipe discharged from the forming cavity 12 is cut off in the closing process;

an annular driving member 32 which is coaxial with the inner core 11 and can be controlled by a driver to rotate in a forward direction or a reverse direction, wherein the annular driving member 32 can be a belt pulley and can be driven by a driving mechanism consisting of a motor (driver) and a transmission belt to rotate clockwise or anticlockwise;

the support shafts 33 are circumferentially distributed at equal intervals by taking the inner core 11 as a reference, the annular driving piece 32 is provided with a plurality of arc-shaped movable areas 34, each support shaft 33 moves in each arc-shaped movable area 34, and the length of each arc-shaped movable area 34 (the length of each arc-shaped movable area 34 refers to the length of each arc-shaped movable area in the circumferential direction) determines the range of forward rotation or reverse rotation of the annular driving piece 32;

a plurality of pairs of linkage shafts 35, wherein each linkage shaft 35 of each pair of linkage shafts 35 is respectively arranged on the circumferential angle a of the annular driving piece 32 and the blade 30, and a linkage piece 36 is arranged between the linkage shafts 35;

when the driver drives the annular driving piece 32 to rotate in the positive direction (which can be clockwise rotation), the blades 30 are mutually spliced;

when the drive drives the annular drive member 32 to rotate in a reverse direction (counterclockwise, relative to forward rotation), the blades 30 move away from each other.

In a specific embodiment of the present invention, the blade 30 includes:

the sheet body 300 at least comprises a circumferential angle a for installing the universal driving shaft, a central angle b spliced with other sheet bodies and a fixed angle c rotatably connected with the outer sleeve 10;

a first blade 301 formed between the central angle b and the circumferential angle a;

a second blade 302 formed between the central angle and a fixed angle;

wherein, the first cutting edge 301 and the second cutting edge 302 can be mutually spliced, and when the second cutting edge 302 partially or totally blocks the output end of the cooling cavity 20, the cooling liquid discharged from the cooling cavity 20 can be reflected (or guided) by the second cutting edge 302 and sprayed onto the pipe material discharged from the forming cavity 12, and part of the cooling liquid can be sprayed in a direction tangential to the outer wall of the pipe material and can give a rotating force to the pipe material.

Referring to fig. 4-7, in this embodiment, schematic diagrams of the cutting device of this embodiment are provided, the cutting device of this embodiment compares the cutting manner of embodiment 1 in which linear motion is driven by a cylinder, the slicing of this embodiment is that an annular driving member is driven by a motor (or a belt assembly) to rotate, so that a blade can rotate with a hinge point of the blade and an outer shaft as a base point, and when the blade rotates, a pipe is cut, and this embodiment is provided with two cutting edges, when cutting, a circle center of the blade and a second cutting edge will contact the pipe first and cut, and when a first cutting edge also contacts the pipe, the pipe can also be cut, so as to improve the cutting efficiency;

furthermore, in this embodiment, the second blade can also guide the cooling liquid, and referring to fig. 5 and 7, in the guiding process, the blade is driven to the position where the second blade shields the cooling cavity, at this time, the cooling liquid will collide with the second blade when being discharged and will be guided by the second blade to flow towards the pipe, and more cooling liquid will flow in a manner of being tangent to the pipe, and the pipe can be driven to rotate while being cleaned (this action can be matched with the vortex in embodiment 3), so as to facilitate the discharge of the pipe;

in the normal forming process, the blades are driven to be mutually spliced, so that the forming cavity is closed, and impurities are prevented from entering the forming cavity to influence the forming quality;

the driving mode of this embodiment is, the driver control annular driving piece is rotatory to make the universal driving shaft position on the annular driving piece change, and through the circumferential angle activity of gangbar pulling blade, thereby drive the activity of blade, and the driver control annular driving piece just can control the blade and be close to each other or keep away from with the rotation of different directions, this embodiment adopts a driver just can drive a plurality of blades simultaneously, and it can ensure the synchronism of each blade cutting, can also reduce the energy consumption.

Example 3 differs from example 2 in that:

in a particular embodiment of the invention, as shown in fig. 8-13, the outer sleeve 10 comprises:

the sheath body 100 is provided with an inner cavity, the inner cavity is used for accommodating the inner core 11, the length of the inner cavity is greater than that of the inner core 11, the forming cavity 12 is formed between the inner cavity and the inner core 11, a discharge cavity 13 is formed in the inner cavity without the inner core 11, and the cooling cavity 20 is formed inside the sheath body 10;

the intercepting cavity 101 is concavely arranged on the inner wall of the sleeve body 100, is communicated with the cooling cavity 20 and is positioned at the intersection of the discharging cavity 13 and the forming cavity 12;

the check valve plate 102 is connected with a piston shaft 103, and one end of the piston shaft 103 penetrates through the sleeve body 100;

the first electromagnetic assembly 104 at least comprises a shell 1040 for the piston shaft to move, the bottom of the shell 1040 is provided with a first electromagnet (composed of a first electromagnetic coil 1041 and a metal core 1042, the first electromagnetic coil 1041 is energized, the metal core 1042 generates magnetism, the first electromagnet can be any one of the existing electromagnets as long as the first electromagnet can be energized to generate magnetism, the magnetism is in direct proportion to the intensity of current, and the magnetism loses magnetism when the power is off, the same applies hereinafter), and a return spring 1043 is connected between the inner cavity of the shell 1040 and the piston shaft 103 (one end of the piston shaft 103 close to the metal core 1042 can be made of metal material);

when the first electromagnet is electrified and the current is a, the first electromagnet generates magnetism and attracts the piston shaft 103 to move towards the direction close to the shell 1040, and the shutoff valve plates 102 are controlled to be completely positioned in the shutoff cavity 101;

when the first electromagnet is electrified and the current is b, b is less than a, the first electromagnet generates magnetism and attracts the piston shaft 103 to move a part of distance towards the direction close to the shell 1040, and each of the chopping valve plates 102 is controlled to be positioned outside the chopping cavity 101 and generates a cutting mark on the surface of the pipe;

when the first electromagnet is powered off, the first electromagnet loses magnetism, the return spring 1043 pushes the piston shaft 103 to move towards the direction away from the shell 1040, and the cutoff valve plate 102 cuts off the inside of the forming cavity 12 and opens the communication part of the cooling cavity 20 and the cutoff cavity 101.

In an embodiment of the present invention, the sheath body 100 includes:

a first shaft body 1000 for accommodating the core 11 and forming a molding cavity 12 with the core 11, and forming the cooling cavity 20 on the first shaft body 100;

an opening area, which is arranged on the first shaft body 1000 and is communicated with the head end of the discharging cavity 13 (the head end is the side close to the forming cavity 12) to form the intercepting cavity 101;

the second shaft body 1001 is located in the discharging cavity 13 and can be controlled by a driver to move relative to the first shaft body 1000, one end of the second shaft body 1001, which is far away from the inner core 11, is fixedly connected with a base plate 1002, the base plate 1002 is used for installing the cutting device 3 (the specific structure is not shown in detail in the drawings of the embodiment, and fig. 3-4 can be referred to), and the base plate 1002 is provided with an injection port corresponding to a cavity opening of each cooling cavity 20, the injection port is communicated with the cooling cavity 20 through an injection pipe 1003, the injection pipe 1003 can be arranged in a sliding mode with the cooling cavity 20, and when the second shaft body 1001 moves, the second shaft body 1001 can be used for closing or opening an opening area.

In an embodiment of the present invention, the cutoff valve plate 102 includes:

a cut-off body 40 for cutting off the tube and able to close the output end of the forming cavity 12;

a booster chamber 41 formed in the cutoff body 40;

a cleaning cavity 42 formed in the cut-off body 40 and communicated with the boosting cavity 41 through a transition port 43;

the liquid inlet pipeline 44 is formed in the cut-off body 40, an input end of the liquid inlet pipeline 44 penetrates through one end, close to the cut-off cavity 101, of the cut-off body 40, cooling liquid enters the liquid inlet pipeline, at least two output ends (z, x) are arranged on the liquid inlet pipeline 44, and the output ends (z, x) of the liquid inlet pipeline 44 are communicated with the cleaning cavity 42;

the liquid outlet pipeline 45 is formed in the cut-off body 40, at least two input ends (v, n) of the liquid outlet pipeline 45 are respectively communicated with the boosting cavity 41 and the cleaning cavity 42, at least two groups of output ends of the liquid outlet pipeline 45 are arranged, one group (q) of the liquid outlet pipelines takes the inner core 11 as a center and is circumferentially distributed on one side, close to the cutting device 3, of the cut-off body 40 at equal intervals, and the other group (p) of the liquid outlet pipeline is coaxial with the inner core 11 and is arranged on one side, close to the cutting device 3, of the cut-off body 40;

a first control body 46 and a second control body 47 which can be respectively connected in the boosting cavity 41 and the cleaning cavity 42 through springs 48, wherein the first control body 46 can be used for closing one input end of the liquid outlet pipeline 45 of the transition port 43 through the springs 48, and the second control body 47 can be used for closing the other input end of the liquid outlet pipeline 45 through the springs 48;

the second solenoid assembly 49, when energized, attracts the first control body 46 to open the transition port 43.

In the embodiment of the present invention, the output end of the liquid outlet pipe 45 located at the center of the cut-off body 40 includes:

a dispersing recessed area 50 recessed on one side of the cut-off body 40 and coaxially arranged with the inner core 11;

the liquid inlets are connected with the output end of the liquid outlet pipeline 45, and the cooling liquid sprayed into the dispersion recessed area 50 by the liquid outlet pipeline 45 can be perpendicular to any radius of the dispersion recessed area 50;

when the cooling liquid in the liquid outlet pipeline 45 is sent into the dispersion depressed area 50, the cooling liquid forms a vortex in the dispersion depressed area 50 and is sprayed out from the output end of the dispersion depressed area 50.

Preferably: also comprises the following steps:

the cutting method comprises the following steps:

Also included are methods of using the cutting devices, comprising:

Referring to fig. 8-13, in this embodiment, the inner cavity of the jacket is divided into a forming cavity and a discharging cavity, and the material extruded by the extruder can be fed into the forming cavity for forming (in this state, the cut valve sheet seals the openings of the discharging cavity and the forming cavity), and when the cut valve sheet of this embodiment is located in the discharging cavity, the cut valve sheet and the inner core are stored at a certain interval, so that when the pipe is formed, one end of the pipe close to the cutting device is closed, which can ensure that the pipe moves in the discharging cavity (before cutting, and the cut valve sheet is not in the discharging cavity), and external impurities cannot enter the forming cavity through the pipe, after the pipe is formed in the forming cavity, the extruder continues to extrude the material into the forming cavity, and push and move the formed pipe into the discharging cavity, and after the formed pipe is easily accommodated in the discharging cavity, the cut valve sheet moves out of the cutting cavity again and is used for sealing the discharging cavity and the forming cavity, the tubular product of arranging the intracavity can discharge alone, and the material in the shaping intracavity can continue the shaping, and both are independent, and the tubular product of arranging the intracavity can promote tubular product through cut-off valve piece blowout coolant liquid and remove, promptly:

referring to fig. 10-12, in this embodiment, after the cutoff valve plate is completely moved out of the cutoff cavity, the cooling liquid in the cooling cavity can enter the cutoff cavity and be respectively fed into the boosting cavity and the cleaning cavity through the liquid inlet pipeline, and the second electromagnetic assembly is energized to attract the first control body to open the transition port, the cooling liquid entering the cleaning cavity enters the boosting cavity through the transition port, and enters the liquid outlet pipeline from the input end v of the liquid outlet pipeline, and simultaneously sprays the cooling liquid from the q outlet of the liquid outlet pipeline, and pushes the pipe in the material discharge cavity to move, after the pipe moves a distance, the vortex formed at the p outlet of the liquid outlet pipeline is sprayed (because the sprayed water is directly sprayed on the inner wall of the dispersion depressed area, therefore, a vortex can be generated or the dispersion depressed area can be in a truncated cone shape by being guided by the inner wall of the dispersion depressed area), and the vortex can assist the rotation of the pipe (the rotation amplitude depends on the strength of the vortex, the strength of the vortex can be determined by the power of the water pump) and move, in embodiment 2, the cooling liquid sprayed from the cold area cavity can be guided by the second cutting edge and can be used based on the rotation of the pipe, when the pipe rotates, the pipe can be conveniently moved out, meanwhile, the pipe can be quickly attached to the cutting edge, the cutting efficiency is improved, and moreover, the vortex can also clean the discharging cavity, mainly discharges waste materials in the discharging cavity, so that the smooth movement of the pipe is ensured, and when the sprayed cooling liquid cannot enable the rest of the pipe to be discharged out of the discharging cavity, the rest of the pipe can be pushed by the next formed pipe to be discharged;

it is worth mentioning that:

this embodiment can also form the cut mark on tubular product when producing specific tubular product, and the cut mark can be convenient for staff's manual cutting and tip polish, also with the staff of being convenient for calculate tubular product length, promptly: in the embodiment, the current of the first electromagnet can be controlled to alternate back and forth between the current a and the current b, so that the cutoff valve plates can be controlled to enter the discharge cavity at intervals, and a cutting mark is generated before the surface of the pipe is not cooled;

this embodiment second axle can be controlled by the cylinder, and it can be cut the valve block again and when being located and cut the intracavity, ensures the integrality in row material chamber, also can seal or open and cut the chamber, avoids impurity entering to cut the chamber and further get into the cooling intracavity.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a shaping cutting system of pvc tubular product which characterized in that: the method comprises the following steps:

2. The forming and cutting system for pvc tubing according to claim 1, wherein: the inner core includes:

the main inner core and a plurality of the sub inner cores;

wherein the fixing member includes:

3. The forming and cutting system for pvc tubing according to claim 1 or 2, wherein: further comprising:

a cooling source for supplying a cooling liquid to the cooling chamber;

4. The forming and cutting system for pvc tubing according to claim 3, wherein: the cutting device includes:

5. The forming and cutting system for pvc tubing according to claim 4, wherein: the blade includes:

a first blade formed between the central angle and the circumferential angle;

a second blade formed between the central angle and a fixed angle;

6. The forming and cutting system for pvc tubing according to claim 5, wherein: the jacket includes:

7. The forming and cutting system for pvc tubing according to claim 6, wherein: the cover body comprises:

8. The forming and cutting system for pvc tubing according to claim 7, wherein: the cutoff valve sheet includes:

a boost cavity formed in the truncated body;

9. The forming and cutting system for pvc tubing according to claim 8, wherein: the output that goes out the liquid pipeline and be located the truncation body center includes:

10. A method for forming and cutting a pvc pipe using the system for producing a drainage pipe according to claim 2, comprising the steps of: