阅读说明：本技术 一种真空排气式螺杆料筒 (Vacuum exhaust type screw charging barrel ) 是由 黄文明 于 2020-04-08 设计创作，主要内容包括：本发明公开了一种真空排气式螺杆料筒,包括设于料筒内的螺杆通道以及设于螺杆通道内且具有计量送料塑化段、强压塑化段、送料减压塑化段和强送塑化段的送料螺杆,料筒具有进料口以及与螺杆通道相通且位于送料减压塑化段处的排气口,还包括：隔板,其设于所述排气口内并可将所述排气口完全分隔为隔板以上区域和隔板以下区域；排气孔,其贯穿地设于所述隔板内；安装座,其设于所述隔板上并具有与所述排气孔连通的安装孔；容纳空间,其位于所述隔板下方并可用于暂存经送料螺杆输送的塑料。本发明通过设置有隔板和容纳空间,可对塑料进行阻挡和暂存,能够有效地防止塑料对排气口排出,亦具有很好的排气作用。(The invention discloses a vacuum exhaust type screw charging barrel, which comprises a screw channel arranged in the charging barrel, and a feeding screw which is arranged in the screw channel and is provided with a metering feeding plasticizing section, a forced plasticizing section, a feeding decompression plasticizing section and a forced feeding plasticizing section, wherein the charging barrel is provided with a feeding hole and an exhaust port which is communicated with the screw channel and is positioned at the feeding decompression plasticizing section, and the vacuum exhaust type screw charging barrel also comprises: a partition plate provided in the exhaust port and capable of completely dividing the exhaust port into an area above the partition plate and an area below the partition plate; the exhaust hole is penetratingly arranged in the clapboard; the mounting seat is arranged on the partition plate and is provided with a mounting hole communicated with the exhaust hole; and the accommodating space is positioned below the partition plate and can be used for temporarily storing the plastics conveyed by the feeding screw. The plastic exhaust device is provided with the partition board and the accommodating space, so that plastic can be blocked and temporarily stored, the plastic can be effectively prevented from being exhausted from the exhaust port, and the plastic exhaust device also has a good exhaust effect.)

1. The utility model provides a vacuum exhaust formula screw rod feed cylinder, is including locating the screw rod passageway in the feed cylinder and locating in the screw rod passageway and have measurement pay-off plastify section, strong pressure plastify section, pay-off decompression plastify section and send the pay-off screw rod of plastify section by force, and the feed cylinder has the feed inlet and communicates with each other and is located the gas vent of pay-off decompression plastify section department with the screw rod passageway, and its characterized in that still includes:

a partition plate provided in the exhaust port and capable of completely dividing the exhaust port into an area above the partition plate and an area below the partition plate;

the exhaust hole is penetratingly arranged in the clapboard;

the mounting seat is arranged on the partition plate and is provided with a mounting hole communicated with the exhaust hole;

and the accommodating space is positioned below the partition plate and can be used for temporarily storing the plastics conveyed by the feeding screw.

2. A vacuum vented screw cartridge as in claim 1, wherein the partition completely divides the vent into an area above the partition and an area below the partition, the receiving space comprising an area below the partition.

3. The vacuum vented screw cartridge of claim 1, further comprising a receiving groove opening in an inner wall of the cartridge at a location where the vent communicates with the screw passageway.

4. The vacuum vented screw cartridge of claim 3, wherein the partition is provided at a bottom end of the vent and divides the vent into a region above the partition completely, and the receiving space comprises a receiving groove.

5. A vacuum vented screw cartridge as in claim 3, wherein the partition completely divides the vent into an area above the partition and an area below the partition, and the receiving space comprises an area below the partition and a receiving slot.

6. The vacuum exhaust type screw charging barrel according to claim 2, 4 or 5, wherein the high pressure plasticizing section is provided with a high pressure plasticizing section, the high pressure plasticizing section is arranged in parallel with the inner wall of the charging barrel, and the gap between the high pressure plasticizing section and the high pressure plasticizing section is 0.5mm-2 mm.

7. The vacuum vented screw cartridge of claim 6, wherein the top end of the feed screw is provided with a forced feed section.

8. The vacuum vented screw cartridge of claim 7, wherein the discharge end of the cartridge is provided with a screen.

9. The vacuum vented screw cartridge of claim 1, wherein the partition and the mount are integrally formed.

Technical Field

The invention relates to the technical field of plastic particle pushing devices, in particular to a vacuum exhaust type screw charging barrel.

Background

Plastics by the extrusion molding in-process, have volatile gas and vapor to produce, need discharge before the injection, and current vacuum exhaust formula screw rod feed cylinder can set up a gas vent mostly, establishes an exhaust duct on it, and the rethread vacuum pump is with gaseous exhaust.

According to the Chinese patent with the application number of 201410252302.8, three grooves are formed in the inner wall of the charging barrel, and an electric heating ring is arranged above the exhaust port and at the lower end of the vacuum pump, so that when the injection molding machine stops working, molten plastic at the exhaust port cannot be solidified to block the exhaust port, and the next working of the injection molding machine cannot be influenced.

In the actual production process, although the top end of the screw is mostly provided with the check valve, when the screw pushes or conveys the plastic, if the amount of the plastic in the barrel is larger or the pushing speed is higher, the possibility that the molten plastic flows out from the exhaust port still exists, so that the prior art needs to be further improved to ensure the exhaust effect and further prevent the plastic from flowing out from the exhaust port.

Disclosure of Invention

The invention aims to solve the problems in the background art and provides a vacuum exhaust type screw barrel which can effectively prevent plastic from flowing out of an exhaust port and has good exhaust effect.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a vacuum exhaust formula screw rod feed cylinder, is including locating the screw rod passageway in the feed cylinder and locating in the screw rod passageway and have measurement pay-off plastify section, strong pressure plastify section, pay-off decompression plastify section and send the pay-off screw rod of plastify section by force, and the feed cylinder has the feed inlet and communicates with each other and is located the gas vent of pay-off decompression plastify section department with the screw rod passageway, still includes: a partition plate provided in the exhaust port and capable of completely dividing the exhaust port into an area above the partition plate and an area below the partition plate; the exhaust hole is penetratingly arranged in the clapboard; the mounting seat is arranged on the partition plate and is provided with a mounting hole communicated with the exhaust hole; and the accommodating space is positioned below the partition plate and can be used for temporarily storing the plastics conveyed by the feeding screw.

Preferably, the partition plate completely divides the exhaust port into an area above the partition plate and an area below the partition plate, and the accommodating space includes the area below the partition plate.

Preferably, the screw feeder further comprises a holding groove which is opened on the inner wall of the feed cylinder at the communication part of the air outlet and the screw channel.

Preferably, the baffle is located the bottom of gas vent and will the gas vent separates for the region more than the baffle completely, accommodation space includes the holding tank.

Preferably, the partition plate completely divides the exhaust port into an area above the partition plate and an area below the partition plate, and the accommodating space includes an area below the partition plate and an accommodating groove.

Preferably, the high-pressure plasticizing section is provided with a high-pressure plasticizing section, the high-pressure plasticizing section is arranged in parallel with the inner wall of the charging barrel, and the gap between the high-pressure plasticizing section and the inner wall of the charging barrel is 0.5mm-2 mm.

Preferably, the top end of the feeding screw is provided with a forced feeding section.

Preferably, the discharge end of the charging barrel is provided with a filter screen.

Preferably, the partition plate and the mounting seat are integrally formed.

The invention has the beneficial effects that:

the plastic exhaust device is provided with the partition board and the accommodating space, so that plastic can be blocked and temporarily stored, the plastic can be effectively prevented from being exhausted from the exhaust port, and the plastic exhaust device also has a good exhaust effect.

Drawings

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

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a partial perspective view of the present invention with the vent in communication with the screw passageway.

In the figure: 1. a charging barrel; 2. a feed inlet; 3. an exhaust port; 4. a screw channel; 5. a feed screw; 51. a metering feeding plasticizing section; 52. a forced compression plasticizing section; 521. a super-pressure plasticizing section; 53. a feeding decompression plasticizing section; 54. forcibly conveying the plastic to a plasticizing section; 55. a forced delivery section; 6. a partition plate; 61. an exhaust hole; 62. the area above the partition plate; 63. the area under the partition; 7. a mounting seat; 71. mounting holes; 8. accommodating grooves; 9. an exhaust duct; 10. and (4) a filter screen.

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.

As shown in fig. 1-4, a vacuum exhaust type screw barrel includes a screw channel 4 disposed in a barrel 1, and a feeding screw 5 disposed in the screw channel 4 and having a metering feeding plasticizing section 51, a forced plasticizing section 52, a feeding decompression plasticizing section 53 and a forced feeding plasticizing section 54, the barrel 1 having a feeding port 2 and an exhaust port 3 communicating with the screw channel 4 and located at the feeding decompression plasticizing section 53, and further includes: a partition plate 6 provided in the exhaust port 3 and capable of completely dividing the exhaust port 3 into an above-partition-plate region 62 and an below-partition-plate region 63; an exhaust hole 61 provided through the separator 6; a mounting seat 7 provided on the partition plate 6 and having a mounting hole 71 communicating with the exhaust hole 61; a receiving space which is located below the partition 6 and can be used for temporarily storing the plastic conveyed by the feed screw 5.

By adopting the technical scheme, due to the arrangement of the partition plate 6 and the accommodating space, when plastics are about to overflow from the exhaust port 3, the extra space provided by the accommodating space can temporarily store the plastics, although the exhaust hole 61 is arranged on the partition plate 6, most of the plastics overflowing from the accommodating space or the screw channel 4 can be blocked and returned to the material screw 5 so as to further prevent the plastics from flowing out of the exhaust port 3, and through the arrangement of the mounting seat 7 positioned above the partition plate 6, even if a small part of the plastics overflow through the exhaust hole 61 and the mounting hole 71, the plastics can be retained in the area 62 above the partition plate, so that the plastics can be effectively prevented from flowing back into the charging barrel 1, and due to the arrangement of the exhaust hole 61 and the mounting hole 71, the gas can be exhausted through the exhaust hole 61, the mounting hole 71 and the exhaust pipeline 9 arranged above the exhaust port 3, and the mounting hole 71 can be arranged, in which an insert post (e.g., a screw) is detachably installed, the mounting hole 71 may be used for exhausting air when the insert post is not installed in the mounting hole 71, and when the material cylinder 1 is to be used for transferring other kinds of plastics, the insert post is installed in the mounting hole 71 to block the mounting hole 71, and then the feeding screw 5 is detached from the material cylinder 1, so that the inside of the material cylinder 1 can be cleaned.

Preferably, the partition 6 completely divides the exhaust port 3 into an above-partition area 62 and an below-partition area 63, and the accommodating space includes the below-partition area 63.

By adopting the above technical scheme, the partition plate 6 can be arranged in the exhaust port 3 in a straight or inclined manner, so that the partition plate 6 can completely separate the exhaust port 3 and form the area 62 above the partition plate and the area 63 below the partition plate, and the area 63 below the partition plate can be used as an accommodating space, so that the area 63 below the partition plate can be used for temporarily storing plastics.

Preferably, the screw extruder further comprises a holding groove 8 which is opened on the inner wall of the barrel 1 at the communication part of the exhaust port 3 and the screw passage 4.

By adopting the above technical scheme, the holding groove 8 can be opened on both axial sides of the feeding screw 5 (as shown in fig. 3 and 4) and also can be opened on both radial sides of the feeding screw 5, so that the holding groove 8 can be used as a holding space or a part of the holding space.

Preferably, the partition plate 6 is disposed at the bottom end of the exhaust port 3 and completely divides the exhaust port 3 into an above-partition-plate area 62, and the accommodating space includes an accommodating groove 8.

Through adopting above-mentioned technical scheme, gas vent 3 bottom is located to baffle 6, and baffle 6 only divides into the above region 62 of baffle with gas vent 3 promptly, and holding tank 8 is used as accommodation space this moment.

Preferably, the partition 6 completely divides the exhaust port 3 into an above-partition area 62 and an below-partition area 63, and the accommodating space includes the below-partition area 63 and the accommodating groove 8.

Through adopting above-mentioned technical scheme, this moment below the baffle regional 63 and holding tank 8 all can be used as accommodation space for accommodation space can more plastics of keeping in.

Preferably, the high pressure plasticizing section 52 is provided with a high pressure plasticizing section 521, the high pressure plasticizing section 521 is parallel to the inner wall of the charging barrel 1, and the gap between the two sections is 0.5mm-2 mm.

By adopting the technical scheme, the gap between the super-strong compression molding section 521 and the inner wall of the charging barrel 1 is smaller than the gap between the super-strong compression molding section 52 and the inner wall of the charging barrel 1, so that the molten plastic can be separated from water when being transmitted through the super-strong compression molding section 521, and the aim of exhausting is better fulfilled.

Preferably, the top end of the feeding screw 5 is provided with a forced feeding section 55.

Through adopting above-mentioned technical scheme, send section 55's setting by force, compare in the screw rod top of prior art and adopt the setting of tip structure, it can more do benefit to the release to plastics.

Preferably, the discharge end of the charging barrel 1 is provided with a filter screen 10.

Through adopting above-mentioned technical scheme, filter screen 10's setting, when plastics were injected out feed cylinder 1, it can carry out effectual filtration to the impurity in the plastics.

Preferably, the partition 6 and the mounting seat 7 are integrally formed.

Through adopting above-mentioned technical scheme, so set up, be convenient for the fixed of mount pad 7 position on baffle 6, also be convenient for to mounting hole 71 and exhaust hole 61's processing.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.