CN207310482U

CN207310482U - A kind of double-helical screw mechanism of coaxial-type extruder

Info

Publication number: CN207310482U
Application number: CN201720989204.1U
Authority: CN
Inventors: 刁智福; 刁玲博
Original assignee: QINGDAO WEIER PLASTICS MACHINE Co Ltd
Current assignee: QINGDAO WEIER PLASTICS MACHINE Co Ltd
Priority date: 2017-08-09
Filing date: 2017-08-09
Publication date: 2018-05-04
Anticipated expiration: 2027-08-09

Abstract

Plastic extruder component assembly manufacturing field is the utility model is related to, especially a kind of double-helical screw mechanism of coaxial-type extruder.It includes：Spreader, shunting disk, inner screw, the external screw rod and slope thrust set with inner cavity, spreader and shunting disk Joint, the left end Joint of spreader and inner screw, the location hole with location hole shoulder is formed in the inner cavity of external screw rod, slope thrust set is threaded onto in location hole and is set on the right end of inner screw, and external screw rod is rotatablely connected by slope thrust set with inner screw.Its inner screw is fixed and there is the design of fulcrum at both ends, under identical material and identical heat treatment condition, it is possible to increase the bending resistance of screw rod, anti-twisting property；The lifting of inner screw intensity provides condition to increase spiral groove depth, and yield can be substantially improved, and has conveying and the double effects being kneaded.

Description

A kind of double-helical screw mechanism of coaxial-type extruder

Technical field

Plastic extruder component assembly manufacturing field is the utility model is related to, especially a kind of double spiral shells of coaxial-type extruder Linkage.

Background technology

The process of plastics, is that the rotary motion for leaning on screw rod promotes plastic raw materials to be intended to forward linear motion, claims Make extrusion, plastic products of different shapes are produced by mould.In the prior art, how research is directed in exterior heat Under the cooperation in source, efficient conveying is extruded with plasticizing.

Under normal conditions, in order to improve transfer efficiency, in addition to changing screw form, most straightforward approach is to improve to turn Speed, and improve rotating speed so that shorter residence time of the plastics in screw rod barrel and influence plasticizing quality.Not influence to mould Change quality, draw ratio certainly will be increased.The draw ratio of early stage is typically 20 decades ago:1 or so, technological progress to today, Through developing into common 33:1 or so.Greatly improved although yield and quality has, but still cannot meet the needs of some products. So as to occurring when needing high yield to extrude, it has to using the situation of two or more co-extrusions, the result is that energy consumption and plus Work cost greatly improves, and has not only caused to waste but also floor space increases.

Utility model content

The utility model aims to solve the problem that the above problem, there is provided a kind of double-helical screw mechanism of coaxial-type extruder, it is used Inner screw is fixed and there is fulcrum design at both ends, under identical material and identical heat treatment condition, it is possible to increase the bending resistance of screw rod, antitorque Ability；The lifting of inner screw intensity provides condition to increase spiral groove depth, and yield can be substantially improved, and has what is conveyed and be kneaded Double effects, the technical solution that it is used are as follows：

A kind of double-helical screw mechanism of coaxial-type extruder, it is characterised in that including：Spreader, shunting disk, inner screw, tool There are the external screw rod and slope thrust set of inner cavity, the inner screw is arranged in the inner cavity of external screw rod, the spreader and shunting disk Joint, the left end Joint of the spreader and inner screw, forms in the inner cavity of the external screw rod and determines with location hole shoulder Position hole, the slope thrust set are threaded onto in location hole and are set on the right end of inner screw, and the external screw rod is pushed away by sliding Power is covered to be rotatablely connected with inner screw.

On the basis of above-mentioned technical proposal, the spreader is threadedly coupled with shunting disk, and the thread rotary orientation of spreader with The thread rotary orientation of inner screw is consistent.

On the basis of above-mentioned technical proposal, the thread rotary orientation of the spreader and the thread rotary orientation of inner screw are left-handed.

On the basis of above-mentioned technical proposal, radially stretch out to be formed and positioned at the slope thrust set left end The matched annular protrusion of hole shoulder, the annular protrusion towards the face of location hole shoulder be thrust face, the thrust face and location hole There is a default distance of expanding with heat and contract with cold between shoulder.

On the basis of above-mentioned technical proposal, the slope thrust set is made of matrix and kollag, described matrix by High-tensile strength brass is made, and the kollag is graphite, is evenly distributed with some embedding holes in described matrix, the graphite assembly in In embedding hole.

The utility model has the following advantages that：First, inner screw is fixed and there is the design of fulcrum at both ends, in identical material and Under identical heat treatment condition, it is possible to increase the bending resistance of screw rod, anti-twisting property；Second, increase spiral groove depth is given in the lifting of inner screw intensity Provide condition because the limitation of the compressed ratio of conventional screw, makes spiral groove depth to deepen again, and spiral groove depth plus It is deep, it is meant that the lifting of yield, because yield is directly proportional to ring body product；Third, the kneading section of conventional screw only focus on being kneaded it is rare defeated Send, be kneaded element and occupy draw ratio, increase the jib-length of screw rod, and the application can be longer than often because of the length of inner screw The kneading section of screw rod is advised, kneading effect can be substantially improved while conveying, therefore with conveying and the double effects being kneaded.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that drawings in the following description are only It is a kind of embodiment of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the acquisition that can also be extended according to the attached drawing of offer is other to implement attached drawing.

Fig. 1：The cross-sectional view (external screw rod only retains part) of the utility model；

Fig. 2：Enlarged structure schematic diagram (section) at the utility model slope thrust set；

Fig. 3：The structure diagram of slope thrust set described in the utility model；

Embodiment

The utility model is described in further detail with example below in conjunction with the accompanying drawings：

The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that to the utility model Limitation.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；It can be directly connected, can also be indirectly connected by intermediary.For the ordinary skill in the art, Concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.

In the description of the utility model, it is to be understood that the orientation or position relationship of the instruction such as term "left", "right" It is based on the orientation or position relationship shown in attached drawing 1, is for only for ease of description the utility model and simplifies description, rather than Indicate or imply that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot It is interpreted as the limitation to the utility model.

As shown in Figure 1 to Figure 3, a kind of double-helical screw mechanism of coaxial-type extruder of the present embodiment, it is characterised in that bag Include：Spreader 1, shunting disk 2, inner screw 3, the external screw rod 4 with inner cavity and slope thrust set 5, the inner screw 3 is arranged at outer In the inner cavity of screw rod 4, the spreader 1 and 2 Joint of shunting disk, the left end Joint of the spreader 1 and inner screw 3, institute State and the location hole 40 with location hole shoulder 41 is formed in the inner cavity of external screw rod 4, the slope thrust set 5 is threaded onto in location hole 40 And be set on the right end of inner screw 3, the external screw rod 4 is rotatablely connected by slope thrust set 5 with inner screw 3.In use, point Flow table 2 is fixedly connected with the main barrel being placed on outside external screw rod 4, and main barrel is fixed, because inner screw 3 passes through spreader 1 It is fixedly connected with shunting disk 2, therefore forms static screw rod.Because inner screw is fixed and there is the design of fulcrum at both ends, in identical material and Under identical heat treatment condition, it is possible to increase the bending resistance of screw rod, anti-twisting property；Second, increase spiral groove depth is given in the lifting of inner screw intensity Condition is provided, because the limitation of the compressed ratio of conventional screw, makes spiral groove depth to deepen again, this design is so that interior spiral shell The length of bar 3 can be more than 3 times that conventional screw is kneaded segment length, and inner screw spiral groove depth can be more than 2 times of conventional screw, And the intensification of spiral groove depth, it is meant that the lifting of yield, because yield is directly proportional to ring body product.Preferably, offered on external screw rod 4 The channel of connection external screw rod inner cavity makes winner's barrel and the melting charge in region folded by external screw rod 4 to enter by channel In external screw rod inner cavity.

Preferably, the spreader 1 is threadedly coupled with shunting disk 2, and the spiral shell of the thread rotary orientation of spreader 1 and inner screw 3 Line rotation direction is consistent.

Preferably, the thread rotary orientation of the spreader 1 and the thread rotary orientation of inner screw 3 are left-handed.

Preferably, the slope thrust is covered radially to stretch out to be formed at 5 left ends and is engaged with location hole shoulder 41 Annular protrusion, the annular protrusion towards the face of location hole shoulder 41 be thrust face 53, the thrust face 53 and location hole shoulder 41 Between there is a default distance of expanding with heat and contract with cold.Slope thrust set plays the positioning of inner screw afterbody, slides thrust function, it is in oil-free Possess high bearing capacity under self-lubricating state, play oil-free, wear-resisting, sliding bearing.First slope thrust is covered and loads inner screw Afterbody (right end), is reloaded into external screw rod location hole, and thrust face will depart from respective distance with location hole shoulder 41 at this time, this distance is Expand with heat and contract with cold gap, otherwise may damage screw rod because thermal expansion produces high pressure, or even influence normal work.

Further, the slope thrust set 5 is made of matrix 50 and kollag 51, and described matrix 50 is by high-tensile strength brass It is made, the kollag 51 is graphite, some embedding holes 52 is evenly distributed with described matrix 50, the graphite assembly is in embedding In hole 52.

The application is in structure design, and using being opposition thinking structure, its conveying mechanism is completely with routine on the contrary, being to become master Move as passive feeding form.Shunting disk 2 is fixedly connected with main barrel, because inner screw 3 is fixed by spreader 1 and shunting disk 2 Connection, therefore form static screw rod.It conveys mechanism：The plastic raw materials of melting from external screw rod 4, eye left from right end, with Counterclockwise rotate.The material occurs in the form of active force, is considered as " nut ".Because left-handed 3 screw rod of inner screw is fixation Formula, then rotating " nut " just (left direction) movement forward counterclockwise.In theory, the thrust of this forward screw thread and movement speed Degree is equal to conventional arrangement.

The utility model is illustrated by way of example above, but the utility model is not limited to above-mentioned specific implementation Example, all scopes that the requires of the utility model protection is belonged to based on any changes or modifications that the utility model is done.

Claims

A kind of 1. double-helical screw mechanism of coaxial-type extruder, it is characterised in that including：Spreader (1), shunting disk (2), inner screw (3), there is the external screw rod (4) and slope thrust set (5) of inner cavity, the inner screw (3) is arranged in the inner cavity of external screw rod (4), The spreader (1) and shunting disk (2) Joint, the spreader (1) and the left end Joint of inner screw (3), the outer spiral shell The location hole (40) with location hole shoulder (41) is formed in the inner cavity of bar (4), the slope thrust set (5) is threaded onto location hole (40) in and it is set on the right end of inner screw (3), the external screw rod (4) is rotated by slope thrust set (5) and inner screw (3) Connection.
A kind of 2. double-helical screw mechanism of coaxial-type extruder according to claim 1, it is characterised in that：The spreader (1) it is threadedly coupled with shunting disk (2), and the thread rotary orientation of spreader (1) is consistent with the thread rotary orientation of inner screw (3).
A kind of 3. double-helical screw mechanism of coaxial-type extruder according to claim 2, it is characterised in that：The spreader (1) thread rotary orientation and the thread rotary orientation of inner screw (3) is left-handed.
A kind of 4. double-helical screw mechanism of coaxial-type extruder according to claim 3, it is characterised in that：The slope thrust Radially stretch out to be formed and location hole shoulder (41) matched annular protrusion, the annular protrusion at set (5) left end It is thrust face (53) towards the face of location hole shoulder (41), there is a default heat between the thrust face (53) and location hole shoulder (41) Swollen shrinkage distance.
A kind of 5. double-helical screw mechanism of coaxial-type extruder according to claim 1 or 4, it is characterised in that：The slip Thrust sleeve (5) is made of matrix (50) and kollag (51), and described matrix (50) is made of high-tensile strength brass, the solid profit Lubrication prescription (51) is graphite, some embedding holes (52) is evenly distributed with described matrix (50), the graphite assembly is in embedding hole (52).