CN211467361U - Melting screw mechanism of extruder - Google Patents

Abstract

The utility model discloses an extruder melting screw mechanism, including a base and a melting section of thick bamboo, base right side top is provided with the fixed bolster, and the fixed bolster top is provided with the motor cabin, and the motor is installed through the fixed bolster to motor cabin inside, and the coaxial fixed mounting in motor left side has the rotation axis, and rotation axis left end fixed mounting has the guide block, and guide block slidable mounting is inboard at a melting section of thick bamboo, and the rotation axis outside is provided with the propulsion screw rod. The utility model mixes the injection liquid in the propelling screw rod through the comprehensive structural design of the propelling main block, the stirring main rod and the stirring auxiliary rod, thereby improving the mixing consistency of the solution inside and outside the propelling screw rod; the inside preformed hole that is provided with of stirring auxiliary rod, the preformed hole is inside can be through the liquid of moulding plastics after the melting, richenes the effect of local stirring, further promotes the homogeneity of the liquid of moulding plastics to increase the efficiency and the quality of heating, thereby promote the quality of injection molding.

Description

Melting screw mechanism of extruder

Technical Field

The utility model relates to an injection moulding device field, in particular to extruder melting screw mechanism.

Background

The screw extruder depends on the pressure and the shearing force generated by the rotation of the screw, so that materials can be fully plasticized and uniformly mixed and are molded through a neck mold. Plastics extruders can be largely classified into twin-screw extruders, single-screw extruders and, less frequently, multi-screw extruders and also screwless extruders.

Chinese patent (publication No. CN 208290444U, bulletin date 2018.12.28) discloses an extruder melting screw mechanism, which is characterized by comprising a connecting body, wherein the right side wall of the connecting body is fixedly provided with one side of a cold-rolled tube, the other side of the cold-rolled tube is fixedly provided with one side of a heating sleeve, the left side wall of the connecting body is spliced with a split shaft, the other end of the split shaft is spliced with a screw, a motor outside the left end of the connecting body is electrified to rotate to drive a coupler to rotate and further drive a split shaft to rotate through a speed reducer, the shaft rotates to drive the screw to rotate, meanwhile, materials are fed from a feed port, the screw is sawn short from the left end, the length of a mixing section is shortened, the damping of the extruded materials is reduced, the retention time of the materials in a screw barrel is reduced, the screw thread of a left-end feeding section is converted into a first screw thread with a wider screw pitch, and the material consumption, the mixing section is shortened, the damping is reduced, the pitch of the first thread is widened, the first thread is deeper, the material consumption is large, the speed of extrusion production is greatly improved, but the screw of the device is unevenly heated, the solution on the outer side of the screw close to the heating sleeve is greatly heated, the solution close to the heating sleeve is slightly heated, the injection molding solution is easily unevenly heated, and the quality problem of injection molding parts is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an extruder melting screw mechanism can effectively solve the problem among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an extruder melt screw mechanism comprising: the base is made of cast iron materials and has good stability, the melting cylinder is arranged above the left side of the base, a fixed bracket is arranged above the right side of the base, a motor cabin is arranged above the fixed bracket, the motor is arranged in the motor cabin through a fixed bracket, a rotating shaft is coaxially and fixedly arranged on the left side of the motor, the left end of the rotating shaft is fixedly provided with a guide block which is arranged at the inner side of the melting cylinder in a sliding way, a structure for supporting the rotating shaft, a propelling screw rod is arranged outside the rotating shaft, the propelling screw rod is of an arc screw rod structure and has a multi-layer structural design, the injection molding material can be heated layer by layer in a grading way, the heating efficiency is further improved, the rotating shaft is driven to rotate by the rotation of the motor, the rotating shaft drives the propelling screw to rotate, and the molten plastic is rotationally propelled through the structure of the propelling screw.

Preferably, the melting cylinder comprises urceolus, heating coil, support frame, axle sleeve and ejection of compact mouth, the rotation axis is installed to the inboard clearance of axle sleeve, can provide the lateral support for the rotation axis through the structure of axle sleeve, avoids the cantilever beam structure to the structural damage of rotation axis, lifting means's stability.

Preferably, the motor cabin outside is provided with a plurality of sets of louvres, the louvre is the motor heat dissipation and uses, and the outside is provided with the filter screen, avoids the dust to enter into and causes the jam in the motor, influences the equipment performance.

Preferably, a preheating cabin is arranged above the melting cylinder, and the injection molding particles are subjected to preliminary heating through the preheating cabin, so that the subsequent heating efficiency is improved.

Preferably, the urceolus is the cask structure of middle part cavity design, the urceolus is made for expanded material, has good heat preservation ability, the urceolus left end is provided with ejection of compact mouth, the inside toper arc angle structure that is provided with in ejection of compact mouth left side increases ejection of compact pressure, promotes the pressure when injecting to promote the pressure of moulding plastics or cast iron, the inside heating coil that is provided with of urceolus, the inside ceramic heating coil that is of heating coil has good heat resistance, heats the inside of urceolus through heating coil, the urceolus right side is provided with the support frame, the support frame middle part is provided with the axle sleeve.

Preferably, impel the screw rod including impel owner piece, stirring mobile jib, stirring auxiliary rod and preformed hole, impel the owner piece to be alloy slope arc helicitic texture, impel owner piece bilateral symmetry and be provided with the stirring mobile jib, the stirring mobile jib is the alloy rod, stirring mobile jib outside interval is provided with a plurality of group's distribution stirring auxiliary rod uniformly, the chamfer setting is done in the stirring auxiliary rod outside, reduces the resistance that rotates the in-process and produce, reduces the energy consumption, the inside preformed hole that is provided with of stirring auxiliary rod, the inside liquid of moulding plastics after can passing through the melting of preformed hole enriches the effect of local stirring.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. through the comprehensive structural design who impels major possession, stirring mobile jib and stirring auxiliary rod, will impel the liquid of moulding plastics in the screw rod to stir to can promote the inside uniformity that mixes with outside solution of impelling the screw rod, the inside preformed hole that is provided with of stirring auxiliary rod, the inside liquid of moulding plastics that can pass through after the melting of preformed hole enriches the effect of local stirring, further promotes the homogeneity of the liquid of moulding plastics, thereby increases the efficiency and the quality of heating, thereby promotes the quality of injection molding.

2. The rotary shaft drives the propelling screw to rotate, the molten plastic is rotationally propelled through the structure of the propelling screw, and the injection molding material is discharged through the left end of the melting cylinder, so that the structure is simple and reliable, and the practicability is good.

Drawings

FIG. 1 is an overall structure diagram of a melting screw mechanism of an extruder according to the present invention;

FIG. 2 is a structural diagram of a melting cylinder in a melting screw mechanism of an extruder according to the present invention;

fig. 3 is a structural diagram of a propulsion screw in the melting screw mechanism of the extruder of the present invention.

In the figure: 1. a base; 2. a melting cylinder; 21. an outer cylinder; 22. a heating coil; 23. a support frame; 24. A shaft sleeve; 25. a discharging nozzle; 3. fixing a bracket; 4. a motor; 5. a rotating shaft; 6. a screw is advanced; 61. A propulsion main block; 62. a stirring main rod; 63. a stirring auxiliary rod; 64. reserving a hole; 7. a preheating chamber; 8. a guide block; 9. heat dissipation holes; 10. a motor compartment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1, an extruder melt screw mechanism includes: the device comprises a base 1 and a melting cylinder 2, wherein the base 1 is a cast iron base and has good stability, the melting cylinder 2 is arranged above the left side of the base 1, a fixed support 3 is arranged above the right side of the base 1, a motor cabin 10 is arranged above the fixed support 3, a plurality of groups of heat dissipation holes 9 are arranged outside the motor cabin 10, the heat dissipation holes 9 are used for dissipating heat of a motor 4, a filter screen is arranged outside the heat dissipation holes to prevent dust from entering the motor 4 to cause blockage and influence on the performance of the device, the motor 4 is arranged in the motor cabin 10 through the fixed support, a rotating shaft 5 is coaxially and fixedly arranged on the left side of the motor 4, a preheating cabin 7 is arranged above the melting cylinder 2, injection molding particles are preliminarily heated through the preheating cabin 7, the subsequent heating efficiency is improved, a guide block 8 is fixedly arranged at the left end of the rotating shaft 5, and, the structure is used for supporting the rotating shaft 5, the pushing screw 6 is arranged on the outer side of the rotating shaft 5, the pushing screw 6 is of an arc screw structure and has a multi-layer structural design, injection molding materials can be heated in a grading mode layer by layer, the heating efficiency is further improved, the rotating shaft 5 is driven to rotate through the rotation of the motor 4, the pushing screw 6 is driven to rotate through the rotating shaft 5, the molten plastic is rotationally pushed through the structure of the pushing screw 6, the injection molding materials are discharged through the left end of the melting cylinder 2, the structure is simple and reliable, and the practicability is good;

as shown in fig. 2, the outer cylinder 21, the heating coil 22, the support frame 23, the shaft sleeve 24 and the discharging nozzle 25, the outer cylinder 21 is a hollow cylinder structure with a hollow middle part, the outer cylinder 21 is made of a foaming material and has good heat preservation capability, the discharging nozzle 25 is arranged at the left end of the outer cylinder 21, a tapered arc angle structure is arranged inside the left side of the discharging nozzle 25 to increase discharging pressure and improve pressure during injection molding or cast iron pressure, the heating coil 22 is arranged inside the outer cylinder 21, the heating coil 22 is internally provided with a ceramic heating coil and has good heat resistance, the heating coil 22 heats the inside of the outer cylinder 21, the support frame 23 is arranged on the right side of the outer cylinder 21, the shaft sleeve 24 is arranged in the middle part of the support frame 23, the rotating shaft 5 is installed in a gap inside the shaft sleeve 24, and lateral support can be provided for the rotating, the structural damage of the cantilever beam structure to the rotating shaft 5 is avoided, and the stability of the equipment is improved;

because the heated melting cylinder 2 is heated at the inner side, the solution at the outer side of the propelling screw 6 is heated greatly, while the solution at the inner side of the propelling screw 6 is heated slightly, which easily causes uneven heating of the injection molding solution, thereby causing the quality problem of injection molding parts, as shown in fig. 3, the propelling screw 6 comprises a propelling main block 61, a stirring main rod 62, stirring auxiliary rods 63 and a reserved hole 64, the propelling main block 61 is an alloy inclined arc-shaped thread structure, the stirring main rods 62 are symmetrically arranged at two sides of the propelling main block 61, the stirring main rod 62 is an alloy rod material, a plurality of uniformly distributed stirring auxiliary rods 63 are arranged at intervals at the outer side of the stirring main rod 62, the chamfer angle is arranged at the outer side of the stirring auxiliary rods 63, the resistance generated in the rotating process is reduced, the energy consumption is reduced, and the injection molding liquid in the propelling screw 6 is stirred through the comprehensive structural design of the propelling main block 61, the stirring main rod 62 and, the inside solution of solution that will mould plastics stirs to can promote the uniformity that advances the inside and outside solution of screw 6 and mix, stirring auxiliary 63 is inside to be provided with preformed hole 64, the inside liquid of moulding plastics that can pass through after the melting of preformed hole 64 enriches the effect of local stirring, further promotes the homogeneity of the liquid of moulding plastics, thereby increases the efficiency and the quality of heating, thereby promotes the quality of injection molding.

The utility model discloses a during the theory of operation: at first, put into preheating the cabin 7 with plastic granules and preheat, enter into a melting section of thick bamboo 2 inside through 7 lower extremes in preheating the cabin, open motor 4, the rotation through motor 4 drives rotation axis 5 and rotates, drives through rotation axis 5 and impels screw rod 6 and rotate, and the structure through impelling screw rod 6 impels the rotation of fused plastics, will mould plastics the material through 2 left ends in a melting section of thick bamboo and discharge, and simple structure is reliable, has good practicality.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides an extruder melting screw mechanism, includes base (1) and a melting section of thick bamboo (2), base (1) left side top is provided with a melting section of thick bamboo (2), its characterized in that: base (1) right side top is provided with fixed bolster (3), fixed bolster (3) top is provided with motor cabin (10), motor (4) are installed through the fixed bolster to motor cabin (10) inside, the coaxial fixed mounting in motor (4) left side has rotation axis (5), rotation axis (5) left end fixed mounting has guide block (8), guide block (8) slidable mounting is inboard at a melting section of thick bamboo (2), rotation axis (5) outside is provided with propulsion screw (6).

2. An extruder melt screw mechanism according to claim 1, wherein: the outer side of the motor cabin (10) is provided with a plurality of groups of heat dissipation holes (9).

3. An extruder melt screw mechanism according to claim 1, wherein: a preheating cabin (7) is arranged above the melting cylinder (2).

4. An extruder melt screw mechanism according to claim 1, wherein: melting section of thick bamboo (2) comprises urceolus (21), heating coil (22), support frame (23), axle sleeve (24) and ejection of compact mouth (25), and urceolus (21) are the cask structure of middle part cavity design, urceolus (21) left end is provided with ejection of compact mouth (25), ejection of compact mouth (25) left side inside is provided with toper arc angle structure, urceolus (21) inside is provided with heating coil (22), heating coil (22) inside is ceramic heating coil, urceolus (21) right side is provided with support frame (23), support frame (23) middle part is provided with axle sleeve (24), rotation axis (5) are installed to axle sleeve (24) inboard clearance.

5. An extruder melt screw mechanism according to claim 1, wherein: impel screw rod (6) including impel main part (61), stirring mobile jib (62), stirring auxiliary rod (63) and preformed hole (64), impel main part (61) to be alloy slope arc helicitic texture, impel main part (61) bilateral symmetry to be provided with stirring mobile jib (62), stirring mobile jib (62) are the alloy rod, stirring mobile jib (62) outside interval is provided with even stirring auxiliary rod (63) of a plurality of component distributions, the chamfer setting is done in stirring auxiliary rod (63) outside, stirring auxiliary rod (63) inside is provided with preformed hole (64).

6. An extruder melt screw mechanism according to claim 1, wherein: the propelling screw (6) is of an arc-shaped screw structure and has a multi-layer structural design.

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