WO2022269705A1

WO2022269705A1 - Feeding device performing temperature equalization of material, screw, and external temperature adjustment part

Info

Publication number: WO2022269705A1
Application number: PCT/JP2021/023452
Authority: WO
Inventors: 健岸川; 巧桝本; 良雄齋藤
Original assignee: 株式会社山城精機製作所
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-12-29
Also published as: JPWO2022269705A1; CN116507467A; JP7353513B2

Abstract

Provided is a feeding device which performs temperature equalization of a material, the feeding device comprising: a screw 10 to which a material is supplied and which feeds a material supplied by rotating the screw 10 while agitating the material; and an internal temperature adjustment part which is provided inside the screw 10, adjusts the internal temperature of the material fed by the screw 10, and equalizes the temperature of the material. The internal temperature adjustment part has a flow passage which is formed inside the screw 10 and causes a fluid for temperature adjustment to flow therethrough. The flow passage rotates integrally with the screw 10.

Description

Feeding device, screw, and external temperature control unit for uniform heating of materials

The present invention relates to a feeding device, a screw, and an external temperature control unit that uniformize the temperature of materials.

Conventionally, there has been known a resin material feeder equipped with a screw that feeds a material while agitating the supplied material by rotating the screw (for example, Patent Document 1). A resin material is supplied from a hopper to the extrusion screw, and by rotation of the extrusion screw, is transported along the length direction of the extrusion screw and introduced into the injection zone within the barrel. The extruder screw then advances without rotation to inject the molten material into the mold.

JP 2020-044845 A

In the above-mentioned conventional feeding device, a plurality of heaters are provided so as to surround the screw, and the material in the barrel can be heated to control the temperature. A temperature difference occurs between the material located near the heater. It is preferable that the temperature of the resin material is uniform as a whole.

The present invention provides a feeding device for uniformizing the temperature of a resin material as a whole, a screw provided in the feeding device, and an external temperature control section, which can feed the resin material with uniform temperature. for the purpose.

The present invention provides a screw for feeding a material, which feeds the material while stirring it by rotating the screw, and a screw provided inside the screw and fed by the screw. The present invention relates to a feeding device that uniformizes the temperature of a material, including an internal temperature control section that adjusts the temperature inside the material to uniform the temperature of the material.

In addition, it is preferable that the internal temperature control section has a flow path that is formed inside the screw and circulates a fluid for temperature control. Moreover, it is preferable that the flow path rotate integrally with the screw. In addition, the flow path includes an inflow-side flow path formed at the axial center position of the screw, and an outflow-side flow path formed in the inflow-side flow path at a position radially outward of the screw. It is preferable to have

Further, when the screw is rotating, the fluid can always flow into the inflow-side channel, and when the screw is rotating, the fluid can always flow out of the outflow-side channel. Preferably possible. Moreover, it is preferable that the said outflow side flow path is formed in multiple numbers parallel to the axial center of the said screw.

In addition, it is preferable that the inflow-side flow path has a groove that makes a round in the circumferential direction on the peripheral surface of the screw. Moreover, it is preferable to provide an external temperature control section for controlling the temperature of the outside of the material. In addition, the present invention relates to a material weighing machine for weighing a predetermined amount of the material, including the feeding device for uniforming the temperature of the material according to any one of the above.

Further, the present invention provides a screw to which a material is supplied, and a screw that feeds the material while stirring the material supplied by rotating the screw, and a screw that is provided inside the screw and is fed by the screw. The present invention relates to a screw constituting a feeding device for uniformizing the temperature of a material, comprising an internal temperature control section for adjusting the internal temperature of the material to uniformize the temperature of the material.

Further, it is preferable that a plurality of the outflow-side flow passages are formed in parallel with the axial center of the screw. Moreover, it is preferable that the inflow-side flow path has a groove that makes a round in the circumferential direction on the circumferential surface of the screw.

Further, the present invention provides a screw to which a material is supplied, wherein the screw rotates to feed the supplied material while stirring, and a screw provided inside the screw, wherein the screw A temperature equalizer for a material, comprising: an internal temperature control unit for controlling the internal temperature of the material to be fed to equalize the temperature of the material; and an external temperature control unit for controlling the external temperature of the material. It relates to an external temperature control unit that constitutes a feeding device that performs temperature control.

In addition, the internal temperature control section has a flow path formed inside the screw for circulating a fluid for temperature control, and the external temperature control section surrounds a portion near the tip end of the screw. are preferably arranged as follows.

According to the present invention, a feeding device for uniformizing the temperature of a resin material as a whole and feeding the resin material, a screw provided in the feeding device, and an external temperature control unit are provided. can provide.

1 is a side partial cross-sectional view showing a feeding device according to an embodiment of the present invention; FIG. Fig. 2 is a side partial cross-sectional view showing the screw and barrel portion of a delivery device according to an embodiment of the present invention; Fig. 4 is an enlarged side cross-sectional view showing the distal end portion of the screw of the feeding device according to the embodiment of the present invention; 4 is a cross-sectional view taken along line IV-IV of FIG. 3; FIG. FIG. 3 is a cross-sectional view taken along line VV of FIG. 2; FIG. 3 is a cross-sectional view taken along line VI-VI of FIG. 2; FIG. 3 is a cross-sectional view taken along line VII-VII of FIG. 2;

A material weighing machine 1 having a feeding device according to this embodiment will be described below with reference to the drawings. Here, for convenience of explanation, the direction from the later-described hopper portion 50 to the cutter portion 30 (to the left in FIG. 1) is defined as the forward direction Fr, and the opposite direction is defined as the rearward direction Rr. Further, the direction from the screw 10 toward the hopper portion 50 (upward direction in FIG. 1) is defined as an upward direction Up, and the opposite direction is defined as a downward direction Dw. Arrows indicating these directions are illustrated in the main drawings.

The material weighing machine 1 is fixed and arranged on the upper surface of the mounting table B, and includes a screw 10, a barrel section 20, a cutter section 30, a drive section 40, a hopper section 50, a fluid supply section 60, have. The screw 10, the barrel section 20, the drive section 40, and the fluid supply section 60 constitute a feeding device. A front end portion of the cylindrically formed barrel portion 20 is connected to the cutter portion 30 . The cutter part 30 is fixed to the upper surface of the mounting table B. As shown in FIG. A driving portion 40 is provided behind the rear end portion of the barrel portion 20 . The drive unit 40 is fixed to the upper surface of the mounting table B. As shown in FIG.

An external temperature control section is provided on the peripheral surface of the cylindrical barrel section 20 . The external temperature control portion is composed of an external groove 201 that circles around the peripheral surface of the barrel portion 20. A plurality of external grooves 201 are formed in the axial direction of the barrel portion 20 at predetermined intervals. Therefore, the external groove 201 is arranged so as to surround the portion near the distal end of the distal end portion 110 of the screw 10, which will be described later. Each of the outer grooves 201 is provided with a circumferential lid portion 202 so as to cover the outer grooves 201 , and temperature-controlled water flows through the outer grooves 201 . An external temperature control section composed of the external groove 201 and the encircling lid section 202 regulates the external temperature of the resin material fed by the screw 10 .

Inside the cylindrical barrel portion 20, the screw 10 is arranged so as to be rotatable with respect to the barrel portion 20 and to advance and retreat in the front-rear direction. A rear end portion of the screw 10 is connected to an actuator 410 of a driving portion 40 configured by a cylinder or the like. By driving the actuator 410, the screw 10 advances and retreats in the front-rear direction. Further, a gear 151 fixed to the screw 10 in a flange shape is provided in the intermediate portion of the screw 10 . The gear 151 is meshed and connected to a pinion 421 fixed to the output shaft of the rotating portion 420 of the driving portion 40 which is composed of a motor or the like. The screw 10 is configured to rotate when the rotating portion is rotationally driven.

The hopper portion 50 is connected to a hopper portion connection portion 210 provided on the peripheral surface of the rear portion of the barrel portion 20 at the hopper portion connection portion 210, as shown in FIG. The internal space of the hopper portion 50 communicates with a material feeding space 204 (see FIG. 2 etc.) formed between the outer peripheral surface of the screw 10 and the inner peripheral surface of the barrel portion 20, and the material is supplied from the hopper portion 50. A powdered resin material is supplied to the feeding space 204 . The fluid supply part 60 is connected to the rear end of the screw 10 . The fluid supply unit 60 supplies temperature-controlled water, which is a fluid, to flow paths (inflow-

side flow paths

121 and 171, outflow-side flow paths 131 and 161) formed inside the screw 10, and circulates through the flow paths. Drain the temperature controlled water. The cutter section 30 has a shutter-type cutter 310 and cuts the resin material fed to the front end portion of the material feeding space 204 .

Next, the screw 10 will be described in more detail. The screw 10 has a tip portion 110 and a base portion 150 as shown in FIG. 2 and the like. As shown in FIG. 3, the distal end portion 110 has a helical portion 1101 and a helical distal end portion 1102 detachably fixed to the front end portion of the helical portion 1101 via a sealing member 1103 . Spiral teeth are formed on the outer peripheral surface of the spiral portion 1101 . A front end portion of the base portion 150 is connected to a rear end portion of the tip portion 110 , and the base portion 150 is configured to have a larger diameter than the tip portion 110 . At the axial position of the base portion 150, as shown in FIG. The tip portion 110 and the tube member 140 have inflow-

side flow paths

121, 171 and outflow-

side flow paths

131, 161, which will be described later. Rotate integrally with 10.

At a position near the rear of the front end portion of the base portion 150 connected to the tip portion 110, the above-described gear 151 protruding from the base portion 150 in a flange shape is provided so as to be rotatable integrally with the base portion 150. The portion behind the gear 151 of the base 150 of the screw 10 is fixed to the supply base 610 in which the supply channel 621, which is the temperature control channel, in the fluid supply unit 60 is formed. It is rotatably supported via bearings.

The screw 10 is provided with an internal temperature control section having an internal flow path formed inside the screw 10 for circulating temperature control water. As shown in FIG. 2, the internal channel is formed extending from the base 150 to the tip 110 of the screw 10, and has inlet-

side channels

121 and 171 and outlet-

side channels

131 and 161. doing. The inflow-

side passages

121 and 171 extend from the end of the base portion 150 of the screw 10 at the axial center position of the screw 10 to the vicinity of the tip tapered portion 113 having a tapered outer shape at the tip portion 110 of the screw 10. ing.

More specifically, at the distal end portion 110 of the screw 10, an inflow-side channel 121 is formed at the axial position of the distal end portion 110, and at the rear portion of the screw 10, a tube member 140 fixed to the base portion 150 is formed. An inflow channel 171 is formed at the axial position, and the rear end of the inflow channel 121 and the front end of the inflow channel 171 are connected. The rear end of the inflow channel 171 communicates with a channel 175 extending in the diametrical direction of the tube member 140, as shown in FIG.

As shown in FIG. 7, the flow path 175 is configured to face the supply flow path 621 forming the fluid supply portion 60 and formed in the supply base portion 610 by the rotation of the screw 10 . When the flow path 175 does not face the supply flow path 621, one opening and the other opening of the flow path 175 are formed so as to circumferentially circle the peripheral surface of the tube member 140 of the screw 10 and extend in the diametrical direction. The supply channel 621 and the channel 175 communicate with each other via a circumferential groove 176 that communicates with the opening. The circumferential groove 176 forms part of the inflow-side flow path 121 . Therefore, the supply flow path 621 and the inflow-side flow path 171 are always communicated with each other, and when the screw 10 is rotating, temperature-controlled water is always supplied from the supply flow path 621 to the inflow-side flow path 171. Although it is possible to flow in, by rotating the screw 10, the flow path 175 faces the supply flow path 621, so that the temperature-controlled water flows vigorously from the supply flow path 621 to the inflow side flow path 171. It is

As shown in FIGS. 2 to 7, the

outflow side passages

131 and 161 are formed in radially outward positions of the screw 10 relative to the

inflow side passages

121 and 171, and are shown in FIGS. 2, from the same position as the tip portion 110 of the inflow-side channel 121, to a position closer to the tip portion 110 of the screw 10 than the rear end portion of the tubular member 140 of the base portion 150 of the screw 10. extends all the way.

More specifically, at the tip 110 of the screw 10, as shown in FIGS. . As shown in FIG. 4, the outflow channel 131 is formed so as to circle the inflow channel 121 in a coaxial positional relationship with the inflow channel 121 as the center. The outflow channel 131 extends to the rear end of the tip 110 . At the rear part of the screw 10, as shown in FIG. Four outflow-side flow paths 161 are formed parallel to the axial center of the screw 10 so as to encircle the path 171 . The four outflow-side flow paths 161 are arranged at equal intervals in the circumferential direction of the tube member 140, and the rear ends of the outflow-side flow paths 161 are located closer to the front ends than the rear ends of the inflow-side flow paths 171. extends up to

The rear ends of the four outflow-side flow paths 161 are connected to and communicate with discharge recesses 165 recessed radially inward of the tube member 140 , respectively. As shown in FIG. 6 , the discharge recess 165 is configured to face the discharge flow path 631 that constitutes the fluid supply section 60 and is formed in the supply base 610 by the rotation of the screw 10 . When the discharge recesses 165 do not face the discharge flow paths 631, the discharge flow paths 631 and the discharge flow paths 631 are discharged via the circumferential grooves 166 that are formed so as to encircle the tubular member 140 and communicate with the openings of the four discharge recesses 165. It communicates with the recess 165 . Therefore, the discharge channel 631 and the discharge recess 165 are always in communication, and the temperature-controlled water can always flow out from the discharge recess 165 to the discharge channel 631 when the screw 10 is rotating. However, when the screw 10 rotates, the discharge recess 165 faces the discharge passage 631 , so that the temperature-controlled water flows out from the discharge recess 165 to the discharge passage 631 with force. The circumferential groove 166 forms part of the outflow-side flow path 161 .

In the material weighing machine 1 with the above configuration, the supplied resin material is agitated and heat-uniformized in the following manner, and the fed material is weighed.

First, pelletized resin material is supplied to the hopper portion 50, temperature-controlled water is supplied to the external groove 201, and temperature-controlled water is supplied from the supply channel 621 of the fluid supply portion 60 to the channel 175 and the circumferential groove 176. is supplied to the inflow side channel 171 through . The temperature-controlled water supplied to the inflow-side channel 171 flows forward through the inflow-side channel 171 and flows into the inflow-side channel 121 . The temperature-controlled water flows into the outflow channel 131 through the through hole 125 at the front end of the inflow channel 121 , flows backward, and flows into the four outflow channels 161 . Then, the temperature-controlled water flows further rearward, passes through the discharge concave portion 165 and the circumferential groove 166, flows out to the discharge channel 631 formed in the supply base portion 610, and flows out of the material weighing machine 1 from the fluid supply portion 60. and discharged.

Next, the pinion 421 of the rotating portion 420 of the driving portion 40 is rotationally driven, so that the gear 151 rotates integrally with the screw 10 . As a result, the rotation of the helical thread 111 of the tip portion 110 of the screw 10 feeds the pellet-shaped resin material supplied to the material feeding space 204 forward while shearing and agitating it.

At this time, as described above, the temperature-controlled water is supplied to the external groove 201, and the temperature-controlled water flows through the inflow-side flow path 121 and the outflow-side flow path 131. Therefore, the heat of the temperature-controlled water The resin material fed by the screw 10 in the material feeding space 204 is heated and temperature-controlled from both the barrel portion 20 side and the screw 10 side, and the internal temperature of the resin material is uniformized. . As a result, the resin material is solidified in a semi-molten state and becomes powder.

By driving the actuator 410 of the drive unit 40, the screw 10 advances forward, whereby the solidified resin material fed forward of the screw 10 is extruded forward. It is then fed to a shutter-type cutter 310 of the cutter unit 30 . The resin material is then cut by a shutter-type cutter 310 to form tablets of the solidified resin material weighed to a predetermined amount.

According to the material weighing machine 1 having the feeding device according to the present embodiment with the above configuration, the following effects can be obtained.

The material weighing machine 1 according to the present embodiment includes a screw 10 to which a material is supplied. and an internal temperature control section (inflow-side channel 121 and outflow-side channel 131) that adjusts the temperature inside the material fed by the screw 10 to equalize the temperature of the material. With this configuration, the resin material fed by the screw 10 in the material feeding space 204 is heated from the screw 10 side to be temperature-controlled, and the internal temperature of the resin material can be made uniform. That is, heat can be uniformly transferred to the pellets by the screw metering method by feeding through the screw 10 .

Also, it is not necessary to preheat the device in advance to form a tablet. Also, by directly preheating the screw 10, uniform heating can be expected. Moreover, by changing the diameter of the screw 10, it is possible to correspond to the diameters and capacities of various types of tablets. In addition, by changing the screw material, various materials can be handled.

In addition, the internal temperature control section has an inflow side flow path 121 and an outflow side flow path 131 which are formed inside the screw 10 and are flow paths for circulating temperature control water, which is a fluid for temperature control. With this configuration, the resin material on the screw 10 side can be easily temperature-controlled by the temperature-controlled water flowing through these flow paths.

Also, the inflow-side channel 121 and the outflow-side channel 131 rotate together with the screw 10 . With this configuration, when the pellet-shaped resin material is heated while being stirred, the temperature of the resin material can be controlled by reliably heating the resin material following the rotation of the resin material, and the temperature of the resin material can be uniformed. can be facilitated.

In addition, the flow paths include an inflow side flow path 121 formed at the axial center position of the screw 10, an outflow side flow path 131 formed in the inflow side flow path 121 at a position radially outward of the screw 10, have With this configuration, it is possible to continue to circulate the temperature-controlled water inside the screw 10, and to continue to stably control the temperature of the resin material.

Further, when the screw 10 is rotating, the fluid can always flow into the inflow side channel 121, and when the screw 10 is rotating, the fluid can always flow out from the outflow side channel 131. be. With this configuration, it is possible to reliably continue to circulate the temperature-controlled water inside the screw 10, and to continue to more stably control the temperature of the resin material.

In addition, a plurality of outflow-side flow paths 161 are formed in parallel with the axis of the screw 10 . With this configuration, the temperature-controlled water flowing through the annular outflow channel 131 can be divided into a plurality of outflow channels 161 and made to flow.

In addition, the inflow-side flow path 171 has a circumferential groove 176 that is a groove that circles in the circumferential direction on the circumferential surface of the screw 10 . With this configuration, it is possible to easily realize a configuration in which the temperature-controlled water can always flow into the inflow-side channel 171 while the screw 10 is rotating.

It also has an external temperature control section (external groove 201, circulation lid section 202) that regulates the temperature of the outside of the resin material. As a result, the temperature of the resin material can be controlled by heating from the external temperature control portion (external groove 201, encircling lid portion 202) in the material feeding space 204, and the temperature of the outside of the resin material is uniformized in the same manner as the temperature of the inside. become possible.

The present invention is not limited to the above-described embodiments, and can be modified within the technical scope described in the claims.

For example, in this embodiment, the fluid is temperature-controlled water, but it is not limited to this. Moreover, the configurations of the screw, the flow path, the external temperature control section, etc. are not limited to the configuration of the screw 10, the inflow side flow path 121, the outflow side flow path 131, the external groove 201, the circulation lid section 202, and the like in this embodiment.

1 material weighing machine 10 screw (feeding device)
20 barrel part (feeding device)
40 drive unit (feeding device)
60 fluid supply unit (feeding device)
121

inflow channel

131, 161 outflow channel 176 circumferential groove 201 external groove 202 circumferential lid portion

Claims

A screw to which a material is supplied, wherein the screw rotates to feed the supplied material while stirring;
an internal temperature control unit provided inside the screw for adjusting the internal temperature of the material fed by the screw to equalize the temperature of the material; feeding device.
The feeding device for uniform heating of the material according to claim 1, wherein the internal temperature control section has a flow path formed inside the screw for circulating a fluid for temperature control.
The feeding device for uniform heating of the material according to claim 2, wherein the flow path rotates integrally with the screw.
The flow path is
an inflow-side channel formed at an axial center position of the screw;
and an outflow side passage formed radially outward of the screw in the inflow side passage. feeding device.
When the screw is rotating, the fluid can always flow into the inflow-side channel,
5. The feeding device for uniform heating of the material according to claim 4, wherein the fluid can always flow out from the outflow channel when the screw is rotating.
The feeding device for uniform heating of the material according to claim 4 or claim 5, wherein a plurality of said outflow-side flow paths are formed parallel to the axial center of said screw.
The feeding device for uniform heating of the material according to any one of claims 4 to 6, wherein the inflow-side channel has a circumferential groove on the circumferential surface of the screw.
The feeding device for uniform heating of the material according to any one of claims 1 to 7, comprising an external temperature control section for adjusting the temperature of the outside of the material.
A material weighing machine for weighing a predetermined amount of the material, comprising the feeding device for uniforming the temperature of the material according to any one of claims 1 to 8.
A screw to which a material is supplied, and a screw that feeds while stirring the material supplied by rotating the screw, and a screw that is provided inside the screw and inside the material that is fed by the screw A screw constituting a feeding device for uniformizing the temperature of the material, comprising an internal temperature control section for adjusting the temperature to uniform the temperature of the material.
11. The screw according to claim 10, wherein the internal temperature control section has a flow path formed inside the screw for circulating a fluid for temperature control.
The screw according to claim 11, wherein the flow path rotates integrally with the screw.
The flow path is
an inflow-side channel formed at an axial center position of the screw;
13. The screw according to any one of claims 11 to 12, further comprising an outflow-side channel of said inflow-side channel formed at a position radially outward of said screw.
The screw according to claim 4 or claim 13, wherein a plurality of said outflow-side passages are formed parallel to the axial center of said screw.
The screw according to any one of claims 13 to 14, wherein the inflow-side channel has a groove that goes around in the circumferential direction on the peripheral surface of the screw.
A screw to which a material is supplied, wherein the screw rotates to feed the supplied material while stirring it, and the screw is provided inside the screw to feed the material fed by the screw. A feeding device for uniformizing the temperature of the material, comprising: an internal temperature control unit that adjusts the internal temperature to uniform the temperature of the material; and an external temperature control unit that adjusts the external temperature of the material. An external temperature control unit that configures the
The internal temperature control section has a flow path formed inside the screw for circulating a fluid for temperature control,
17. The external temperature control section according to claim 16, wherein the external temperature control section is arranged so as to surround a portion near the tip of the screw.