CN207643660U - Heat pipe-type temperature adjusting screw rod - Google Patents

Abstract

The utility model discloses a kind of heat pipe-type temperature adjusting screw rod, belong to plastic extrusion facility field, solve in the prior art plastics occurs in machine barrel flow back mixing cause temperature unevenness, radiate bad technical problem, the screw rod includes screw body, mixing refining head, screw rod shank, in this case, by the way that cavity is arranged jointly inside screw body and screw rod shank, and it is inserted into cooling water pipe in this cavity, heat pipe is set inside screw body, and heat conduction medium is filled in this heat pipe, so that even if the plastics that mixing occurs in machine barrel are overheated by screw rotation, these heats can pass to cooling water by heat conduction medium, and extrusion screw rod is endlessly taken out of by cooling water, therefore, compared with the prior art, the heat pipe-type temperature adjusting screw rod of this case has the advantages that cooling effect is more preferable.

Description

Heat pipe-type temperature adjusting screw rod

Technical field

The utility model is related to plastic extrusion facility field, more particularly to a kind of extrusion spiral shells for processing thermal sensitivity plastics Bar.

Background technology

In the prior art, extruder generally includes machine barrel, the extrusion screw rod that is rotatably arranged in machine barrel, passes with extrusion screw rod The driving device of dynamic connection, the structure of the extrusion screw rod of plastic extruder are generally divided into three sections, including feed zone, binder section, squeeze Go out section, extrusion screw rod during the work time paragraph by paragraph heats plastics, until by plastic extrusion, partly plastic melt due to by Pressure effect to extrusion screw rod easily flows back at the extrusion port of machine barrel, and plastic melt and part in machine barrel is caused to return Mixing occurs for the plastic melt of stream, and so as to cause the non-uniform temperature of entire plastic melt, what it is when extrusion screw rod processing is temperature-sensitive Property plastics when, " non-uniform temperature " that plastic melt after this mixing occurs is particularly evident, for example, since plastic melt is in machine Interior wall friction in cylinder with extrusion screw rod and machine barrel generates excessive heat, if these heats cannot be discharged in time, part is moulded Material will even decompose, and then influence the quality of plastic extruder fabricated product.

Utility model content

In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of better heat pipe-type temperature of cooling effect Spend adjusting screw rod.

In order to realize the purpose of above-mentioned utility model, the utility model adopts the following technical solution：

A kind of heat pipe-type temperature adjusting screw rod, including screw body, it is fixed at the screw body front end Mixing refining head, the screw rod shank for being connected to the screw body rear end, the screw body, screw rod shank are axially inside Cavity is offered jointly, and cooling water pipe, the outer wall of the cooling water pipe and the screw rod sheet are provided in the cavity Body, screw rod shank inner wall between be provided with outlet passage jointly, on the screw rod shank rotation be provided with it is described cold But the rotary joint that water pipe is fixedly connected, the rotary joint have and the water inlet that is connected inside the cooling water pipe Mouthful, the water outlet that is connected with the outlet passage, be additionally provided with multiple heat axially extended in the screw body Pipe, which is located at the outside of the cavity, and multiple heat pipes are uniformly distributed in the circumferential direction of the screw body, each It is vacuum state in the heat pipe, and is filled with heat conduction medium.

In above-mentioned technical proposal, it is preferred that the heat conduction medium in the heat pipe accounts for the 15~20% of heat pipe volume.

In above-mentioned technical proposal, it is preferred that a diameter of 5~10mm of the heat pipe, long 250~500mm.

In above-mentioned technical proposal, it is preferred that the mixing refining head is threaded in the front end of the screw body.

In above-mentioned technical proposal, it is preferred that the screw body includes feed zone, binder section, extruding zone, the pressure The outer diameter of material section becomes larger in an axial direction, and the maximum of the outer diameter of the binder section is less than the outer diameter of the extruding zone, institute It is more than the outer diameter of the feed zone at the minimum of the outer diameter for the binder section stated.

In above-mentioned technical proposal, it is preferred that multiple heat pipes are respectively positioned on the extruding zone.

In above-mentioned technical proposal, it is preferred that the heat conduction medium is water or conduction oil or alcohol.

In above-mentioned technical proposal, it is preferred that the mixing refining head has multiple protrusions circumferentially, multiple described Protrusion is uniformly distributed in an axial direction.

The utility model obtains following advantageous effect compared with prior art：In this case, by screw body and screw rod Common setting cavity inside shank, and it is inserted into cooling water pipe in this cavity, heat pipe is set inside screw body, and hot herein Heat conduction medium is filled in pipe so that even if the plastics that mixing occurs in machine barrel are overheated by screw rotation, these heat Amount can pass to cooling water by heat conduction medium, and endlessly take extrusion screw rod out of by cooling water, therefore, compared to The heat pipe-type temperature adjusting screw rod of the prior art, this case has the advantages that cooling effect is more preferable.

Description of the drawings

Attached drawing 1 is the schematic front view of the heat pipe-type temperature adjusting screw rod of the utility model；

Attached drawing 2 is the longitudinally cutting schematic diagram of attached drawing 1；

Attached drawing 3 is the close-up schematic view of attached drawing 2；

Wherein：100, heat pipe-type temperature adjusting screw rod；1, screw body；11, cavity；111, feed zone；112, binder section； 113, extruding zone；12, cooling water pipe；13, outlet passage；14, heat pipe；2, mixing refining head；21, raised；3, screw rod shank；4, it rotates Connector；41, water inlet；42, water outlet.

Specific implementation mode

For technology contents, construction feature, institute's reached purpose and effect of utility model is described in detail, below in conjunction with implementation Example simultaneously coordinates attached drawing to be described in detail.Wherein, the "front", "rear" being previously mentioned in the present embodiment is respectively shown in attached drawing 1 Left and right side direction, " axial direction " refer to shown in attached drawing 1 along the length direction of mixing refining head/screw body/screw rod shank, " longitudinal direction " refers to that vertically the direction of cutting, " circumferential direction " refer to along mixing refining head/screw body/screw rod shank shown in attached drawing 1 Circumference direction.

As shown in Fig. 1, it is shown as the schematic front view of heat pipe-type temperature adjusting screw rod, the heat pipe-type temperature adjusting screw rod 100 include screw body 1, mounted on 1 front end of screw body mixing refining head 2, be connected to the screw shank of 1 rear end of screw body Portion 3 and the rotary joint 4 being rotatably arranged on screw rod shank 3.Screw body 1 includes feed zone 111, binder section 112 and squeezes Go out section 113, the outer diameter of binder section 112 becomes larger in an axial direction, and the maximum of the outer diameter of binder section 112 is less than extruding zone 112 Outer diameter, the minimum place of the outer diameter of binder section 112 more than feed zone 111 outer diameter, this is because plastics enter the machine barrel of extruder After interior, what is contacted at first is feed zone 111, is then moved to binder section 112, and enhancing and machine barrel and spiral shell at binder section 112 The CONTACT WITH FRICTION of bar improves melting effect, is finally moved to extruding zone 113 and prepares to squeeze out.Screw rod shank 3 is used for and driving device It is mutually sequentially connected, when adjusting screw rod rotates in the machine barrel of extruder, rotary joint 4 is opposite remains stationary.

As shown in Fig. 2, it is shown as the longitudinally cutting schematic diagram of attached drawing 1, mixing refining head 2, which is threadedly coupled, to be arranged in screw body 1 front end, screw body 1, screw rod shank 3 are axially inside provided with cavity 11, cooling water are provided in cavity 11 jointly Pipe 12 is provided with outlet passage 13 jointly between the outer wall and screw body 1 of cooling water pipe 12, the inner wall of screw rod shank 3, cooling Water pipe 12 is fixedly connected with rotary joint 4, and therefore, when adjusting screw rod 100 rotates in machine barrel, cooling water pipe 12 keeps relatively quiet Only state, rotary joint 4 have and the water inlet 41 being connected inside cooling water pipe 12, the water outlet being connected with outlet passage 13 Mouth 42,1 inside of screw body, which has, to be axially extended and is in multiple heat pipes 14 in 11 outside of cavity, each heat pipe 14 Vacuum state, and it is filled with heat conduction medium.Wherein, heat conduction medium can be water, oil, alcohol, can also be that other are used to cool down Liquid, in order to enable the heat conductivility of screw body 1 is more preferable, multiple heat pipes 14 are uniformly distributed in the circumferential direction of screw body 1, And the heat conduction medium in heat pipe 14 accounts for the 15~20% of 14 volume of heat pipe, preferably 20%；The length of heat pipe 14 is 250~500mm, excellent Select 500 mm, a diameter of 5~10mm, preferably 10 mm.Therefore, after cooling water pipe 12 is passed through cooling water, due to being returned in extruder barrel With original plastic melt mixing occurs for the plastic melt of stream, and the plastic melt of mixing is adjusted in addition because uneven heating is even It saves the turning effort of screw rod and the rubbing action of machine tube inner wall and generates excessive heat, the heat conduction medium in heat pipe 14 is more by this Remaining heat absorption, then by this extra heat transfer to cooling water pipe 12, which is finally cooled in water pipe 12 Cooling water constantly absorb until taking the outside of adjusting screw rod 100 out of, this adjusting screw rod for utilizing " heat pipe principle " manufacture dissipates Thermal effect is more preferable；Therefore, when thermal sensitivity plastics are processed in the extruder equipped with such screw rod, even if the plastic melt of reflux Mixing, the temperature that can also be kept constant so that plastic raw materials go out machine barrel occurs with original plastic melt in machine barrel Be not in the larger temperature difference at mouthful, ensure that quality of the plastics when squeezing out.

It is shown as the close-up schematic view of attached drawing 2 as shown in Fig. 3, mixing refining head 2 has circumferentially multiple convex It plays 21, multiple raised 21 to be uniformly distributed in an axial direction, therefore, mixing refining head 2 can play the role of stirring material so that material is in machine What is melted in cylinder is more uniform.

Above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with technique Personage can understand the content of the utility model and implement according to this, the scope of protection of the utility model can not be limited with this. It is all according to equivalent change or modification made by the spirit of the present invention, should be covered within the scope of the utility model.

Claims (8)

1. a kind of heat pipe-type temperature adjusting screw rod, including screw body（1）, be fixed at the screw body（1）Front end The mixing refining head in portion（2）, be connected to the screw body（1）The screw rod shank of rear end（3）, it is characterised in that：The spiral shell Bar body（1）, screw rod shank（3）Cavity is axially inside offered jointly（11）, the cavity（11）Inside it is provided with cooling Water pipe（12）, the cooling water pipe（12）Outer wall and the screw body（1）, screw rod shank（3）Inner wall between altogether It is same to be provided with outlet passage（13）, the screw rod shank（3）Upper rotation is provided with and the cooling water pipe（12）It is fixed to connect The rotary joint connect（4）, the rotary joint（4）With with the cooling water pipe（12）The water inlet that inside is connected （41）And the outlet passage（13）The water outlet being connected（42）, the screw body（1）Inside it is additionally provided with multiple edges Axially extending heat pipe（14）, the heat pipe（14）Positioned at the cavity（11）Outside, and multiple heat pipes（14）Described Screw body（1）Circumferential direction on be uniformly distributed, each heat pipe（14）It is inside vacuum state, and is filled with heat conduction matchmaker It is situated between.

2. heat pipe-type temperature adjusting screw rod according to claim 1, it is characterised in that：The heat pipe（14）Interior heat conduction Medium accounts for heat pipe（14）The 15~20% of volume.

3. heat pipe-type temperature adjusting screw rod according to claim 2, it is characterised in that：A diameter of the 5 of the heat pipe~ 10mm, long 250~500mm.

4. heat pipe-type temperature adjusting screw rod according to claim 1, it is characterised in that：The mixing refining head（2）Screw thread connects It is connected on the screw body（1）Front end.

5. heat pipe-type temperature adjusting screw rod according to claim 1, it is characterised in that：The screw body（1）Including Feed zone（111）, binder section（112）, extruding zone（113）, the binder section（112）Outer diameter become larger in an axial direction, institute The binder section stated（112）Outer diameter maximum be less than the extruding zone（113）Outer diameter, the binder section（112）'s It is more than the feed zone at the minimum of outer diameter（111）Outer diameter.

6. heat pipe-type temperature adjusting screw rod according to claim 5, it is characterised in that：Multiple heat pipes（14）Equal position In the extruding zone（113）.

7. heat pipe-type temperature adjusting screw rod according to claim 1, it is characterised in that：The heat conduction medium is water or leads Deep fat or alcohol.

8. heat pipe-type temperature adjusting screw rod according to claim 1, it is characterised in that：The mixing refining head（2）With edge Multiple protrusions of circumferentially extending（21）, multiple protrusions（21）It is uniformly distributed in an axial direction.