CN215203360U - Tail end cutting device of extruder - Google Patents

Abstract

The utility model discloses an extruder end blank device, including blank head, extruder, motor, gear and protective sheath, the blank head is annular hollow structure, be equipped with the extrusion head in the discharge tube way of extruder with one heart, the extrusion head passes the center of blank head, the extrusion head of extruder has cup jointed the protective sheath corresponding to the inside wall of blank head, the meshing has the gear on the main shaft of motor, the outer fringe of blank head has tooth, the gear with the outer fringe meshing of blank head; the utility model has the advantages that: the cutting processes of all parts of the plastic pipe are synchronous, the notch is neat, burrs cannot occur, and the protective sleeve protects the extrusion head of the extruder.

Description

Tail end cutting device of extruder

Technical Field

The utility model relates to the field of machinary, more specifically relates to an end blank device of extruder.

Background

The plastic material enters the extruder from the hopper, is conveyed forward under the drive of the rotation of the extrusion head, and is subjected to the heating of the charging barrel and the shearing and compression effects brought by the extrusion head in the forward movement process to melt the material, so that the change among three states of glass state, high elastic state and viscous state is realized.

Under the condition of pressurization, the material in a viscous state passes through a die with a certain shape and then becomes a continuous body with a cross section similar to the die shape according to the die. Then cooling and shaping to form a glass state, thereby obtaining the workpiece to be processed. Generally need cut it after the cooling design, cut into the plastic tubing that length accords with the production requirement, the cutting that adopts at present all is at the plastic tubing in-process of carrying forward, through the quick cutting of blade, but because plastics are carried forward always, the in-process from the top down of cutting cuts, the contact surface is little, extrude from top to bottom, lead to the incision burr easily, the plastic tubing quality descends, and directly cut the plastic tubing of cooling shaping in the cutting process, do not have the strong point, easily at the in-process of cutting from the top down, make the plastic tubing downward sloping under the pressure effect, thereby make the incision uneven in the cutting process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in the terminal blank device of prior art's extruder leads to incision burr, the uneven problem of incision easily.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: the utility model provides an end blank device of extruder, includes blank head, extruder, motor, gear and protective sheath, the blank head is annular hollow structure, it extrudes the head to be equipped with one heart in the ejection of compact pipeline of extruder, extrudes the head and passes the center of blank head, the extrusion head of extruder correspond to the protective sheath has been cup jointed to the inside wall of blank head, the meshing has the gear on the main shaft of motor, the outer fringe of blank head has tooth, the gear with the outer fringe meshing of blank head. The cutting head is of an annular hollow structure, the extrusion head of the extruder penetrates through the center of the cutting head, the cutting head is supported on the extrusion head in the cutting process, the annular cutting tool bit cuts the plastic pipe inwards, the contact surface is large, the cutting processes of all parts of the plastic pipe are synchronous, the cut is neat, and burrs cannot occur. In addition, when the plastic pipe formed by extruding and cooling by an extruder is adopted, the cutting head is fixed on the extrusion head for promoting the plastic to move forwards, the plastic is cut in the process that the plastic passes through the cutting head, the extrusion head is used as a supporting point, the plastic is uniformly cut in the circumferential direction of the extrusion head, so that the cut is neat, and meanwhile, the extrusion head can be protected by the protective sleeve.

The material cutting head comprises a shell and an upper cover plate, and the upper cover plate is embedded in the shell and is rotationally connected with the shell; the casing is for running through the cylinder of seting up the cavity along the central line, the annular groove has been seted up along the direction of perpendicular to central line to the inner wall of cylinder, and recess and casing center pin setting altogether, the blank head still includes a plurality of blade, the blade is crescent, the one end of blade is passed through the axis of rotation and is rotated and fix on the upper cover plate, the one end joint that the protective sheath was kept away from to the blade is in the recess, it is protruding to be equipped with the friction on the face of recess and blade contact, and the edge of blade to self crooked has the cutting edge, and all blades are with its bellied back of a knife blade towards clockwise to the annular array sets up in the recess. The blade is blocked in the groove, and the tail end of the blade is driven to move in the rotating process of the shell.

Preferably, the upper cover plate center is provided with first through-hole, extrudes the head and passes in proper order the center of casing and the first through-hole of upper cover plate rotate with the casing and be connected, the upper cover plate along the outer fringe of first through-hole sets up a plurality of second through-holes, every the blade pass through the second through-hole with the upper cover plate rotates and is connected. After the tail end of the blade moves, the blade is rotationally connected with the upper cover plate, the whole blade is driven by the tail end of the blade to rotate by taking the second through hole as the center of a circle, and in the whole moving process, all the blades form an annular cutting surface and are continuously opened and closed along with the rotating forward and reverse rotating directions.

Preferably, the diameter of the first through hole is equal to or less than the maximum diameter of a circle formed by the midpoints of the blades.

Preferably, the diameter of the groove is smaller than the minimum length of a connecting line between the vertexes of a figure enclosed by the tail ends of all the blades.

Preferably, each blade is rotatably connected with the upper cover plate through a second through hole by using a cylindrical bolt, two ends of the cylindrical bolt are provided with an expanded part, and the blade and the upper cover plate are positioned between the expanded parts at the two ends of the cylindrical bolt. The function of the swelling part is to ensure that the blade and the upper cover plate cannot be separated.

Preferably, the diameter of the upper cover plate is the same as the outer diameter of the housing.

Preferably, the protective sleeve is one of a ceramic protective sleeve, a diamond protective sleeve or a high hardness alloy steel protective sleeve.

Preferably, the upper cover plate is fixedly connected with a positioning column, and the positioning column is fixedly connected with the wall body. The positioning column is used for preventing the cutting head from deviating to cause inaccurate cutting position.

Compared with the prior art, the utility model has the following advantages:

(1) the cutting head is of an annular hollow structure, the extrusion head of the extruder penetrates through the center of the cutting head, the cutting head is supported on the extrusion head in the cutting process, the annular cutting tool bit cuts the plastic pipe inwards, the contact surface is large, the cutting processes of all parts of the plastic pipe are synchronous, the cut is neat, and burrs cannot occur.

(2) The cutting head is fixed on the extrusion head which enables the plastic to move forwards, when the cooled and formed plastic pipe is extruded by the extruder, the plastic penetrates through a gap between the cutting head and the extrusion head, the cutting head cuts the extrusion head in the radial direction, and at the moment, the extrusion head is used as a supporting point, and the extrusion head cuts uniformly in the radial direction, so that the cut is regular.

(3) The extrusion head is not seriously abraded through designing the protective sleeve, and the extrusion head is protected.

Drawings

Fig. 1 is a B-direction sectional view of a blanking head of a blanking device disclosed in an embodiment of the present invention;

fig. 2 is a schematic view illustrating the installation of a protective sheath in the blanking device according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a top cover plate of a blanking head of the blanking device according to the embodiment of the present invention being removed;

fig. 4 is a schematic structural diagram of a blanking device disclosed in an embodiment of the present invention;

fig. 5 is a sectional view of the blanking device according to the embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a state of the blanking head of the blanking device according to the embodiment of the present invention rotating clockwise;

fig. 7 is a schematic diagram of a state of the blanking head of the blanking device according to the embodiment of the present invention rotating counterclockwise.

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

As shown in fig. 1 to 7, an extruder end blanking device comprises a blanking head 1, an extruder 2, a motor 3, a gear 4 and a protective sleeve 5.

As shown in fig. 1, which is a B-direction cross-sectional view of a blanking head of a blanking device disclosed in an embodiment of the present invention, the blanking head 1 is an annular hollow structure, the blanking head 1 includes a casing 101, the casing 101 is a cylinder penetrating along a center line and provided with a cavity, an annular groove 102 is provided on an inner wall of the cylinder along a direction perpendicular to the center line, the groove 102 and the casing 101 share a center axis, and as shown in fig. 2, the installation diagram of a protective sleeve in the blanking device disclosed in an embodiment of the present invention is shown; as shown in fig. 3, for the utility model discloses a schematic diagram when the upper cover plate takes off in blank head of blank device that the embodiment discloses, blank head 1 still includes 5 blades 103, and blade 103 is crescent, the one end of blade 103 is passed through axis of rotation 105 and is rotated and fix on casing 101, and the blade 103 is kept away from in the recess 102 of the one end joint on the lateral wall of casing 101 of protective sheath 5, be equipped with friction bulge (not shown in the figure) on the face of recess 102 and the contact of blade 103, friction bulge is used for increasing frictional force for blade 103 rotates the in-process and uses axis of rotation 105 to produce relative motion with casing 101 as the axle center under the frictional force effect.

The edges of the blades 103 bent towards themselves have cutting edges, all the blades 103 with their convex backs face clockwise and are arranged in an annular array in the groove 102, the length of the blades 103 being 1.4 times the radius of the shell 101; during the rotation of the housing 101, the housing 101 rotates the blades 103 counterclockwise and moves the cutting edges toward the protective cover 5, and the cutting edges of the respective blades 103 enclose a substantially circular shape.

The blanking head 1 further comprises an upper cover plate 104, a first through hole 1041 is formed in the center of the upper cover plate 104, the diameter of the upper cover plate 104 is the same as the outer diameter of the shell 101, the upper cover plate 104 is embedded in the shell 101 and is rotatably connected with the shell 101, and an extrusion head 201 is concentrically arranged in a discharge pipeline of the extruder 2; the end of the extrusion head 201 sequentially penetrates through the center of the casing 101 and the first through hole 1041 of the upper cover plate 104 to be rotatably connected with the casing 101, the end face of the extruder 2 is far away from the blanking head 1, the end face of the upper cover plate 104 is fixed with the positioning column 6, and the positioning column 6 is fixedly connected with a wall body. The positioning column 6 is used for fixing the upper cover plate 104, so that the upper cover plate 104 and the shell 101 have relative movement, power for cutting is provided, and in addition, the cutting position inaccuracy caused by deviation of the material cutting head 1 is prevented. The upper cover plate 104 is provided with a plurality of second through holes (not shown) along the outer edge of the first through hole 1041, and each blade 103 is rotatably connected with the upper cover plate 104 through the second through hole. After the tail end of the blade 103 moves, because the blade 103 is rotationally connected with the upper cover plate 104, the whole blade 103 is driven by the tail end of the blade 103 to rotate by taking the second through hole as a circle center, and in the whole moving process, all the blades 103 form an annular cutting surface and are continuously opened and closed along with the rotating forward and reverse rotating directions. Each blade 103 is rotatably connected with the upper cover plate 104 through a second through hole by using a cylindrical bolt 105, both ends of the cylindrical bolt 105 are provided with an expanded part (not shown), and the blade 103 and the upper cover plate 104 are located between the expanded parts of both ends of the cylindrical bolt 105. The function of the enlarged portion is to ensure that the blade 103 and the upper cover plate 104 do not separate. As shown in fig. 3, which is a schematic view of the upper cover plate of the blanking head of the blanking device disclosed in the embodiment of the present invention when being removed, it can be seen from fig. 3 that when the upper cover plate 104 is removed, the blade 103 is also removed because it is rotatably connected with the blade 103 through the cylindrical bolt 105.

The diameter of the first through hole 1041 is smaller than or equal to the maximum diameter of a circle formed by the middle point of each blade 103, so that the rotating shaft is prevented from being too close to the blade 103 on one side of the groove 102, and the cutting edge can not cut the plastic pipe in the rotating process.

The diameter of the groove 102 is smaller than the minimum length of a connecting line between the vertexes of a figure enclosed by the tail ends of all the blades 103. The blade 103 is urged against the side wall of the groove 102, and when the blade 103 is driven by the housing 101 to rotate, the end of the blade 103 in contact with the groove 102 moves under the action of the pressure of the side wall, so that the blade 103 rotates around the cylindrical plug pin 105 as a rotating shaft. It will be appreciated that the diameter of the recess 102 can be designed by a person skilled in the art according to the actual requirements, thereby avoiding that the insert 103 is always idle.

As shown in fig. 4, which is a schematic structural diagram of the material cutting device disclosed in the embodiment of the present invention, an extrusion head 201 is concentrically disposed in a discharge pipe of the extruder 2; the end of extruding head 201 passes the center of blank head 1 is connected with the terminal rotation of casing 101, 2 extrude first 201 of extruder corresponding to the protective sheath 5 has been cup jointed to the inside wall of blank head 1, protective sheath 5 is one of ceramic protective sheath, diamond protective sheath or high hardness alloy steel protective sheath. A gear 4 is meshed with a main shaft of the motor 3, teeth are arranged on the outer surface of a shell 101 of the blanking head 1, and the gear 4 is meshed with the teeth on the outer surface of the shell 101 of the blanking head 1. Fig. 5 is a cross-sectional view of the blanking device in the direction a, without the plastic tube being shown, which has a larger diameter than the extrusion head 201, and at the moment shown in fig. 5 a cut has been completed, waiting for the next cut.

The utility model discloses a working process and principle do: the extruder 2 extrudes raw materials, the raw materials are molded and cooled in the discharge pipeline 20 to obtain a molded and hardened plastic pipe, the plastic pipe advances under the action of the extrusion head 201, and the plastic pipe passes through the hole surrounded by the blade 103 along with the advance of the plastic pipe and further passes through the material cutting head 1. When the length of plastic tubing reaches the set length, when needing the cutting, motor 3 rotates, and then drives gear 4 and rotate, and gear 4 drives casing 101 through the meshing process and rotates, and casing 101 and then drive blade 103 motion, and then make the cutting edge of blade 101 move towards the plastic tubing, when the diameter of the circle that the cutting edge encloses is less than the external diameter of plastic tubing, accomplishes once cutting, cuts the plastic tubing of set length down. As shown in fig. 6, for a state schematic diagram when the blanking head of the blanking device disclosed in the embodiment of the present invention rotates clockwise, as shown in fig. 6, for completing the state after one cutting, the blade 103 is away from the plastic tube, and in the state shown in fig. 6, the motor 3 rotates to drive the gear 4 to rotate, the gear 4 drives the casing 101 to rotate through the engagement process, and all the blades 103 rotate counterclockwise to wait for the next cutting. Wherein the rotation direction of the cutting head 1 is determined by the positive and negative rotation of the motor 3 engaged with the cutting head, and the rotation speed of the cutting head 1 depends on the working frequency of the motor 3.

Example 2

Example 2 differs from example 1 in that:

the side wall of the groove 102 is provided with a friction bulge, during cutting, when the blade 103 is driven by the shell 101 to rotate, the blade 103 relatively rotates along the groove 102 under the action of friction force and side wall pressure, after one-time cutting is finished, the motor 3 reversely rotates relative to the direction of the embodiment 1 to drive the gear 4 to reversely rotate, the gear 4 drives the shell 101 to reversely rotate through a meshing process, then all the blades 103 clockwise rotate, the friction bulge on the side wall applies clockwise force to one end of the blade 103, which is contacted with the rest of the groove 102, the blade edge slowly returns to the state shown in figure 6 along with the clockwise rotation of the blade 103, after returning to the state shown in figure 6, the motor 3 starts to rotate according to the rotating direction of the embodiment 1 again to realize cutting again, the steps are repeated, the cutting is carried out all the time, the cutting edge is released back to the state shown in figure 6 after one-time cutting, the plastic pipe is pushed forward all the time before the blade edge reaches the side wall of the plastic pipe, when the cutting edge reaches the state of fig. 7, ready for cutting, the cut plastic tube has a certain length, and the length is related to the rotation speed of the blade 103. As shown in fig. 7, which is a schematic view of the state of the blanking head of the blanking device according to the embodiment of the present invention rotating counterclockwise,

through the technical scheme, the utility model discloses a principle of blank head 1 is similar to the shutter shading principle of camera in the terminal blank device of extruder. The cutting head 1 is of an annular hollow structure, the extrusion head 201 of the extruder 2 penetrates through the center of the cutting head 1, the cutting head 1 is supported on the extrusion head 201 in the cutting process, the annular cutting tool bit cuts the plastic pipe inwards, the contact surface is large, the cutting processes of all parts of the plastic pipe are synchronous, the notch is neat, and burrs cannot occur. In addition, when a plastic pipe formed by extruding and cooling in the extruder 2 is adopted, the cutting head 1 is fixed on the extrusion head 201 for enabling the plastic to move forwards, the plastic is cut in the process of passing through the cutting head 1, the extrusion head 201 serves as a supporting point, the plastic is uniformly cut in the circumferential direction of the extrusion head 201, so that the cut is tidy, and meanwhile, the extrusion head 201 can be protected by the protective sleeve 5.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. The tail end cutting device of the extruder is characterized by comprising a cutting head, the extruder, a motor, a gear and a protective sleeve, wherein the cutting head is of an annular hollow structure, the extruding head is concentrically arranged in a discharge pipeline of the extruder and penetrates through the center of the cutting head, the inner side wall of the extruding head of the extruder, corresponding to the cutting head, is sleeved with the protective sleeve, the gear is meshed with a main shaft of the motor, teeth are arranged on the outer edge of the cutting head, and the gear is meshed with the outer edge of the cutting head; the material cutting head comprises a shell and an upper cover plate, and the upper cover plate is embedded in the shell and is rotationally connected with the shell;

the casing is for running through the cylinder of seting up the cavity along the central line, the annular groove has been seted up along the direction of perpendicular to central line to the inner wall of cylinder, and recess and casing center pin setting altogether, the blank head still includes a plurality of blade, the blade is crescent, the one end of blade is passed through the axis of rotation and is rotated and fix on the upper cover plate, the one end joint that the protective sheath was kept away from to the blade is in the recess, it is protruding to be equipped with the friction on the face of recess and blade contact, and the edge of blade to self crooked has the cutting edge, and all blades are with its bellied back of a knife blade towards clockwise to the annular array sets up in the recess.

2. The end blanking device of the extruder as claimed in claim 1, wherein the center of the upper cover plate is provided with a first through hole, the extrusion head sequentially passes through the center of the housing and the first through hole of the upper cover plate to be rotatably connected with the housing, the upper cover plate is provided with a plurality of second through holes along the outer edge of the first through hole, and each blade is rotatably connected with the upper cover plate through the second through hole.

3. The end cutting device of an extruder as claimed in claim 2, wherein the diameter of the first through hole is equal to or smaller than the maximum diameter of a circle surrounded by the midpoints of the blades.

4. The extruder tip blanking device of claim 2 wherein the diameter of said groove is less than the minimum length of a line connecting the vertices of a figure enclosed by the tips of all said blades.

5. The end blanking device of the extruder as claimed in claim 2, wherein each of the blades is rotatably connected to the upper cover plate through a second through hole by a cylindrical pin, each of the two ends of the cylindrical pin is provided with an enlarged portion, and the blade and the upper cover plate are located between the enlarged portions of the two ends of the cylindrical pin.

6. The extruder end blanking device of claim 2 wherein the diameter of said upper cover plate is the same as the outer diameter of said housing.

7. The extruder end blanking device of claim 1 wherein said protective sheath is one of a ceramic sheath, a diamond sheath or a high hardness alloy steel sheath.

8. The end blanking device of the extruder as claimed in claim 1, wherein the upper cover plate is fixedly connected with a positioning column, and the positioning column is fixedly connected with a wall.

Images