CN208529689U - A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board - Google Patents

A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board Download PDF

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Publication number
CN208529689U
CN208529689U CN201820504238.1U CN201820504238U CN208529689U CN 208529689 U CN208529689 U CN 208529689U CN 201820504238 U CN201820504238 U CN 201820504238U CN 208529689 U CN208529689 U CN 208529689U
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section
screw
exhaust
screw rod
order
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CN201820504238.1U
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黄伟红
王志军
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Zhejiang Jinhai Plastic Machinery Co Ltd
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Zhejiang Jinhai Plastic Machinery Co Ltd
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Abstract

A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board, including screw rod and flight, flight length direction along screw rod cylindrical surface is arranged, flight and screw rod form screw channel and spiral shell rib, it is characterized by: the screw rod is divided into feed zone, single order compression section, single order metering section, barrier screen, mixing section, exhaust section, second order squeeze section and second order metering section from discharging is fed to along its length, screw rod offers an exhaust outlet in the corresponding position of exhaust section, the spiral shell rib of exhaust section is away from the spiral shell rib less than feed zone away from 34~36:1 of screw slenderness ratio.The utility model has the characteristics that reasonable in design, extrusion effect is good, and acrylic leftover pieces can be made to be added directly into extruder and squeezed out, and squeezes out product and stablizes, has saved man power and material, reduced costs.

Description

A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board
Technical field
The utility model belongs to processing of high molecular material field of mechanical technique, is related to a kind of screw-rod structure of extruder, especially It is related to a kind of dedicated exhaust screw of acrylic broken material extrusion board.
Background technique
Extruder is used to carry out a variety of particulate materials to be sufficiently mixed after extruding and export, and is used primarily in plastics or rubber system Make field.Raw material heating is allowed to be run through in the case where pressurization with certain shapes in viscosity flow shape by extruder when work Mouth mold, and become section and the similar non-individual body of Oral incision and then pass through cooling, with certain geometrical shape and ruler Very little raw material becomes elastomeric state from viscous state, and last cooling and shaping is glassy state, obtains required product.
Acryl plates extruder refers to the appearance that acrylic plastics are entered by extruder feed opening between screw rod and machine barrel Inside chamber, plastics are elapsed forward, are elapsed in face of plastics generation and the perpendicular thrust in slant edge face by the slant edge rotated by screw rod In the process, due to the friction and interparticle friction between plastics and screw rod, plastics and machine barrel, at the same outside machine barrel heating and It gradually melts, the plastics of melting are squeezed out by mold, are cut off leftover pieces after the traction of three rollers, are generated qualified product.For production A large amount of leftover pieces are generated in the process, and traditional method is to be granulated the recycling of acrylic leftover pieces again, then re-apply in sub- gram Power extrusion, but man power and material can be greatly increased in this way, improve product cost.In order to which a kind of acrylic corner need to be designed Expect the dedicated exhaust screw of extrusion board, acrylic leftover pieces can be added directly into extruder and be squeezed out, saved manpower and Material resources reduce the cost of product.
Through looking into, a kind of Chinese patent " efficient combination type screw rod " of existing Patent No. CN201310402538.0, screw rod It is followed successively by feeding section, melt zone (segregation section), mixing section, restricted section, metering section, feeding section uses double thread structure, here Melt zone is also referred to as segregation section, adds a screw thread again in screw rod melt zone, that is, melt zone is made of two screw threads, and this two An original screw thread is formed by screw channel and is divided into two screw channels by screw thread;Mixing section is one start screw structure, and restricted section is provided with Straight trough barrier, metering section use mixed milling type structure.This combined screw rod increases draw ratio, while the charging spiral shell rib ratio of screw rod It is relatively deep, material feeding ability is enhanced, to increase yield, but is plasticized also less desirable with exhaust effect, it is therefore desirable to open A kind of dedicated exhaust screw machine barrel is issued to meet the needs of acrylic broken material extrusion board.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of acrylic corner for the above-mentioned state of the art The dedicated exhaust screw for expecting extrusion board has the characteristics that reasonable in design, extrusion effect is good.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of acrylic leftover pieces extrusion board Dedicated exhaust screw, including screw rod and flight, flight length direction along screw rod cylindrical surface is arranged, flight and spiral shell Bar forms screw channel and spiral shell rib, it is characterised in that: the screw rod is divided into feed zone, single order from discharging is fed to along its length Compression section, single order metering section, barrier screen, mixing section, exhaust section, second order squeeze section and second order metering section, it is right on the machine barrel of screw rod An exhaust outlet should be offered in the corresponding position of exhaust section, the spiral shell rib of exhaust section is away from the spiral shell rib less than feed zone away from screw rod major diameter Than 34~36:1.
As an improvement, screw channel of the feed zone etc. is deep, the spiral groove depth of single order compression section gradually becomes shallower as to single order and measures Section, screw channel of single order metering section etc. are deep.
As an improvement, the spiral groove depth of the exhaust section than feed zone screw channel depth and remain unchanged to second order squeeze section.
As an improvement, the spiral groove depth of the second order squeeze section is finally connected to second order metering section, second order by deep gradually become shallower as Screw channel of metering section etc. is deep.
Improve again, equidistantly offer several longitudinal grooves on the screw rod cylindrical surface of the barrier screen, longitudinal groove be divided into Hopper and two groups of blow tank, the alternate setting of two groups of longitudinal grooves, wherein the outlet of feed well is closed, discharging in axis direction The entrance of slot is closed in axis direction.
It improves again, the major diameter of thread between the feed well and blow tank is less than screw diameter.
Further, the screw rod cylindrical surface of the mixing section is equipped with a row or several rows pin, and pin is cylindrical or rectangular Pin.
Preferably, the draw ratio 35:1 of the screw rod, screw diameter 45~φ of φ 200mm.
Further, the spiral shell rib of the feed zone, single order compression section, single order metering section, second order squeeze section and second order metering section Away from identical, the spiral shell rib of exhaust section away from the spiral shell rib for feed zone away from 1/2.
Finally, the length of the second order metering section is greater than single order metering section, the length of single order compression section is greater than second order squeeze Section, the length of exhaust section are greater than the length of single order compression section, and the length of feed zone accounts for the 20~30% of screw rod total length.
Compared with the prior art, the advantages of the utility model are: the structure to screw rod is reasonably designed, use The screw rod of 35:1 draw ratio, guarantee acrylic leftover pieces inside screw rod can abundant fusion plastification, generated gas can Effectively it is discharged by screw rod exhaust section from machine barrel exhaust outlet;Two compression sections are set, two metering sections, and to spiral groove depth into Row setting, so that plastics basically reach plasticizing after feed zone, compression section, metering section;Barrier screen is set, makes plastics in screw rod Under the molten condition of the inside, containing when not melting the molten stream of solid granule to barrier screen by shear action, thus sufficiently molten Melt, mix;Mixing section is set, keeps melting abundant;Exhaust section is set, is pumped after contained gas to exhaust outlet in fused materials. The utility model has the characteristics that reasonable in design, extrusion effect is good, and acrylic leftover pieces can be made to be added directly into extrusion It is squeezed out in machine, squeezes out product and stablize, saved man power and material, reduced costs.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As shown in Figure 1, a kind of dedicated exhaust screw of acrylic leftover pieces extrusion board, including screw rod 1 and flight 2, the length direction along 1 cylindrical surface of screw rod of flight 2 is arranged, and flight 2 and screw rod 1 form screw channel 2a and spiral shell rib 2b, screw rod 1 from Be fed to discharging be divided into along its length feed zone A, single order compression section B, single order metering section C, barrier screen D, mixing section E, Exhaust section F, second order squeeze section G and second order metering section H, wherein screw channel of feed zone A etc. is deep, the spiral groove depth of single order compression section B It gradually becomes shallower as to single order metering section C, screw channel of single order metering section C etc. is deep, screw channel of the spiral groove depth than feed zone A of exhaust section F It depth and remains unchanged to second order squeeze section G, the spiral groove depth of second order squeeze section G is gradually become shallower as by deep to second order metering section H, second order Screw channel of metering section H etc. is deep, and the corresponding position on the machine barrel of screw rod 1 corresponding to exhaust section F offers an exhaust outlet, feed zone A, Single order compression section B, single order metering section C, second order squeeze section G are identical away from L with the spiral shell rib of second order metering section H, the spiral shell rib of exhaust section F away from L1 is the spiral shell rib of feed zone A away from the 1/2 of L, and this structure can guarantee that acrylic leftover pieces can be carried out sufficient compression in screw rod 1 It is plasticized and steam is discharged;Equidistantly offer several longitudinal grooves 3 on 1 cylindrical surface of screw rod of barrier screen D, longitudinal groove 3 divide for into Hopper 3a and bis- groups of blow tank 3b, two groups of alternate settings of longitudinal groove 3, wherein the outlet of feed well 3a is envelope in axis direction Close, the entrance of blow tank 3b in axis direction be it is closed, the major diameter of thread between feed well and blow tank is than 1 diameter of screw rod Smaller, material is flowed by feed well by entering blow tank compared with minor thread outer diameter, makes acrylic plastics in 1 the inside molten of screw rod Under state, containing, by shear action, a large amount of mechanical energy becomes thermal energy when not melting the molten stream of solid granule to barrier screen, Make not melt solid granule melting, mixing;It is respectively equipped with 1 row's pin 4 on 1 cylindrical surface of screw rod of mixing section E, pin 4 can be with For cylindrical or rectangular pin, when melting material flows through mixing section E, shearing fever is generated, can also make not melt material plasticizing, fusant Gas in material is kneaded by shearing becomes tiny and uniform;Screw channel is deep at exhaust section F, and volume is bigger, due to sub- gram Power leftover pieces contain certain humidity, and material contains certain mixed gas after melting, fused materials are extruded into the exhaust of screw rod 1 When section F, fused materials pressure is poly- to drop, and is pumped after contained gas to exhaust outlet in fused materials;In addition, the present embodiment The draw ratio of screw rod 1 is set as 35:1, and the diameter for concurrently setting screw rod 1 is 45~φ of φ 200mm, guarantees that acrylic leftover pieces exist Inside screw rod can abundant fusion plastification, generated gas can be arranged effectively by screw rod exhaust section from machine barrel exhaust outlet Out, due at second order squeeze section G groove depth gradually become shallower as and be finally connected to second order metering section H, slot etc. is deep at second order metering section H, makes Fused materials are obtained further to be plasticized at second order squeeze section G and second order metering section H, it is then steady in isobaric, equivalent and comparison It is squeezed out under the conditions of fixed temperature.
Detailed process are as follows: acrylic leftover pieces enter the slant edge rotated after 1 feed zone A of screw rod by screw rod 1 in face of plastics Generation and the perpendicular thrust in slant edge face, plastics are elapsed forward, during passage, due to plastics and screw rod 1, plastics and machine barrel Between friction and interparticle friction, while machine barrel outside heating and gradually melt.
The present embodiment is actually used, and it is molten to may make that acrylic leftover pieces are able to carry out adequately shearing inside screw rod 1 Melt, acrylic leftover pieces by squeezing out in vented extruder, the gas of generation can effectively pass through 1 exhaust section F of screw rod It is discharged from machine barrel exhaust outlet.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change It also should be regarded as the protection scope of the utility model into retouching.

Claims (10)

1. a kind of dedicated exhaust screw of acrylic leftover pieces extrusion board, including screw rod and flight, flight is along screw rod Length direction is arranged on cylindrical surface, and flight and screw rod form screw channel and spiral shell rib, it is characterised in that: the screw rod is from being fed to out Material is divided into feed zone, single order compression section, single order metering section, barrier screen, mixing section, exhaust section, second order pressure along its length Contracting section and second order metering section, the corresponding position that exhaust section is corresponded on the machine barrel of screw rod offer an exhaust outlet, the spiral shell of exhaust section Rib is away from the spiral shell rib less than feed zone away from 34~36:1 of screw slenderness ratio.
2. dedicated exhaust screw according to claim 1, it is characterised in that: screw channel of the feed zone etc. is deep, single order The spiral groove depth of compression section gradually becomes shallower as to single order metering section, and screw channel of single order metering section etc. is deep.
3. dedicated exhaust screw according to claim 2, it is characterised in that: the spiral groove depth of the exhaust section is than charging Section screw channel depth and remain unchanged to second order squeeze section.
4. dedicated exhaust screw according to claim 3, it is characterised in that: the spiral groove depth of the second order squeeze section by It gradually becomes shallower as deeply and is finally connected to second order metering section, screw channel of second order metering section etc. is deep.
5. dedicated exhaust screw according to claim 1, it is characterised in that: on the screw rod cylindrical surface of the barrier screen etc. Away from offering several longitudinal grooves, longitudinal groove is divided into feed well and two groups of blow tank, the alternate setting of two groups of longitudinal grooves, wherein The outlet of feed well in axis direction be it is closed, the entrance of blow tank is closed in axis direction.
6. dedicated exhaust screw according to claim 5, it is characterised in that: the spiral shell between the feed well and blow tank Line outer diameter is less than screw diameter.
7. dedicated exhaust screw according to claim 1, it is characterised in that: set on the screw rod cylindrical surface of the mixing section There is a row or several rows pin, pin is cylindrical or rectangular pin.
8. according to claim 1 to dedicated exhaust screw described in 7 any claims, it is characterised in that: the screw rod Draw ratio 35:1, screw diameter 45~φ of φ 200mm.
9. according to claim 1 to dedicated exhaust screw described in 7 any claims, it is characterised in that: the feed zone, Single order compression section, single order metering section, second order squeeze section and second order metering section spiral shell rib away from identical, the spiral shell rib of exhaust section is away from for charging Section spiral shell rib away from 1/2.
10. according to claim 1 to dedicated exhaust screw described in 7 any claims, it is characterised in that: the second order meter The length for measuring section is greater than single order metering section, and the length of single order compression section is greater than second order squeeze section, and the length of exhaust section is greater than single order The length of compression section, the length of feed zone account for the 20~30% of screw rod total length.
CN201820504238.1U 2018-04-10 2018-04-10 A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board Active CN208529689U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820504238.1U CN208529689U (en) 2018-04-10 2018-04-10 A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820504238.1U CN208529689U (en) 2018-04-10 2018-04-10 A kind of dedicated exhaust screw of acrylic leftover pieces extrusion board

Publications (1)

Publication Number Publication Date
CN208529689U true CN208529689U (en) 2019-02-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113694565A (en) * 2021-09-02 2021-11-26 上海盛普机械制造有限公司 Defoaming device with sectional type screw and ceramic bushing and defoaming method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113694565A (en) * 2021-09-02 2021-11-26 上海盛普机械制造有限公司 Defoaming device with sectional type screw and ceramic bushing and defoaming method thereof

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