CN209566482U - Polymer kneading member with different adhesion and extruder including same - Google Patents

Abstract

The utility model provides a kind of macromolecule with different adhesion strengths and is kneaded component and including its extruder.It includes: main body that the macromolecule, which is kneaded component, inner cavity with truncated conical shape, main body are open with open first as feed inlet at the smallest first end of cross-sectional area of the rotary table of main body and have open second opening at the maximum the second end of cross-sectional area of the rotary table in main body；And baffle, it is located in inner cavity in the second opening, and with the inner surface of main body with equal spacings, using as discharge port, wherein, main body has doping region and nonpolar area on the inner surface for being alternately arranged at main body on the direction vertical with the axis direction of rotary table.The macromolecule of example embodiment according to the present utility model, which is kneaded component, to replace the screw configuration in existing extruder to reduce time cost so as to avoid the replacement and maintenance to screw rod.

Description

Polymer kneading member with different adhesion and extruder including same

technical field

The utility model relates to a mixing component for an extruder, in particular to a mixing component for a non-screw extruder.

Background technique

With the development of polymer materials, it is more and more difficult to synthesize a new polymer material. Therefore, the main research direction of polymer materials at present is to carry out various modifications on known polymer materials, and the most commonly used modification method is blending modification. Blending modification refers to mixing two or more polymer materials together, and preparing new composite polymer materials with certain specific properties by adding different modifiers and different ratios between raw materials. The most commonly used equipment used to prepare this polymer composite material is the extruder.

An extruder usually mixes two or more substances to achieve uniform or relatively uniform mixing. Commonly used extruders usually include single-screw extruders, twin-screw extruders, and multi-screw extruders. The screw of the extruder usually has the dual functions of transmission and mixing. Through the rotation of the screw, the material can be conveyed forward. Not only that, it can also form a certain shearing and stirring effect on the molten components in the extruder sleeve. To achieve the purpose of mixing evenly.

However, due to the existence of the screw, the wear between the screw and the wear between the screw and the sleeve is inevitable, so this type of extruder usually needs to carry out the maintenance process of the screw after a period of use. This process usually requires removal of the screw. The disassembly process will consume a lot of time and cost. Not only that, but the manufacturing materials and manufacturing process of the screw are quite complicated, so this will increase the manufacturing cost of the screw extruder.

Contents of the invention

In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a screwless mixing member and an extruder including the mixing member.

According to one aspect of the present utility model, a polymer kneading member with different adhesion is provided, and the polymer kneading member includes: a main body, an inner cavity having a frustum shape, and the cross-sectional area of the main body at the frustum of the main body having an open first opening as a feed inlet at the smallest first end and an open second opening at the second end with the largest cross-sectional area of the frustum of the body; and a baffle at the second opening Located in the inner cavity and spaced at equal intervals from the inner surface of the main body to serve as a discharge port, wherein the main body has polar regions and non-polar region.

According to an example embodiment of the present invention, the diameter ratio of the cross-section of the frustum of a cone at the first end to the cross-section of the frustum of a cone at the second end may be 1:2.5-1:10.

According to an example embodiment of the present invention, the ratio of the diameter of the cross-section of the frustum of a cone at the first end to the minimum distance from the first end to the second end may be 1:10-1:15.

According to an exemplary embodiment of the present invention, the polar region may include a hydroxyl group, and the nonpolar region may include a long linear alkane having not less than 10 carbons.

According to an example embodiment of the present invention, the polar region and the nonpolar region may have the same width in the axial direction of the frustum of the cone.

According to an example embodiment of the present invention, the body may include one of iron and aluminum.

According to another aspect of the present utility model, there is provided an extruder, the extruder comprising: the polymer mixing member as described above; a charging part, used for adding materials to the polymer mixing member; and The discharge part is used to shapely discharge the materials in the polymer mixing component, wherein the polymer mixing component is rotatably connected with the charging part and the discharge part.

According to an example embodiment of the present invention, the charging part may include a heating cylinder communicated with the feeding port of the kneading member, and a feeding screw located inside the heating cylinder.

According to an example embodiment of the present invention, the discharge part may communicate with the discharge port of the kneading member.

According to yet another aspect of the present invention, there is provided a method for extruding polymers, the method comprising: adding materials into a mixing member; and rotating the mixing member to mix the materials, wherein the mixing member Comprising: a main body with an inner cavity in the shape of a frustum of a cone, the main body has an open first opening as a feed inlet at the first end of the frustum of the main body with the smallest cross-sectional area and a first opening at the first end with the largest cross-sectional area of the frustum of the main body There is an open second opening at the two ends; and a baffle plate is located in the inner cavity at the second opening and is spaced at equal intervals from the inner surface of the main body to serve as a discharge port, wherein the main body has a The polar regions and the nonpolar regions are alternately arranged on the inner surface of the main body in a direction perpendicular to the axial direction of the main body.

According to an example embodiment of the present invention, the diameter ratio of the cross-section of the frustum of a cone at the first end to the cross-section of the frustum of a cone at the second end may be 1:2.5-1:10.

According to an example embodiment of the present invention, the ratio of the diameter of the cross-section of the frustum of a cone at the first end to the minimum distance from the first end to the second end may be 1:10-1:15.

According to an exemplary embodiment of the present invention, the polar region may include a hydroxyl group, and the nonpolar region may include a long linear alkane having not less than 10 carbons.

According to an example embodiment of the present invention, the polar region and the nonpolar region may have the same width in the axial direction of the frustum of the cone.

According to an exemplary embodiment of the present invention, when adding the material into the mixing member, the material may be added into the mixing member through the charging part.

According to an exemplary embodiment of the present invention, the charging part may include a heating cylinder communicated with the feeding port of the kneading member and located on the upper part of the heating cylinder, a feeding port for feeding and a conveying port located inside the heating cylinder. Feed screw.

According to an exemplary embodiment of the present invention, the kneading member can be rotated around the axis of the circular table at the angular velocity of formula 1,

Formula 1:

Here, in Equation 1, ω represents the angular velocity of the rotation of the kneading member, g represents the gravitational acceleration, and d represents the diameter of the cross-section of the truncated cone at the first end.

According to an example embodiment of the present invention, the method may further include: discharge the material in the kneading member in a shaped manner.

According to an exemplary embodiment of the present invention, the material in the kneading member can be discharged in a shaped manner through the discharge part.

According to an example embodiment of the present invention, the body may include one of iron and aluminum.

According to the utility model, the polymer mixing member with different adhesion and the extruder comprising it have at least one of the following technical effects:

1) The utility model replaces the screw structure in the existing extruder with a mixing member having a polar area and a non-polar area, thereby avoiding the replacement and maintenance of the screw, and reducing the time cost;

2) The structure of the mixing member of the utility model is simple, which reduces the manufacturing cost;

3) The new mixing member for extruder proposed by the utility model provides new ideas for this field.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

1 is a perspective view showing a polymer mixing member according to an exemplary embodiment of the present invention;

Fig. 2 is a diagram showing the development of the main body of the polymer kneading member shown in Fig. 1;

FIG. 3 is a schematic plan view showing an extruder according to an example embodiment of the present invention.

Detailed ways

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Hereinafter, a polymer kneading member according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 .

FIG. 1 is a perspective view showing a polymer kneading member according to an exemplary embodiment of the present invention. FIG. 2 is a diagram showing development of a main body of the polymer kneading member shown in FIG. 1 .

Referring to FIGS. 1 and 2 , the polymer kneading member 100 having different adhesive forces may include a body 110 and a baffle 120 .

The main body 110 may have a hollow cavity in the shape of a truncated cone, and the upper end and the lower end of the main body 110 may be open, specifically, the main body 110 has an open at the first end where the cross-sectional area of the frustum of the main body 110 is the smallest. The first opening 111 can be used as the feed port of the polymer mixing member 100; the main body 110 has an open second opening 112 at the second end with the largest cross-sectional area of the circular table of the main body 110, which can serve as a polymer The outlet of the mixing member 100. That is to say, the main body 110 may be in the form of an integral structure surrounded by boards with open upper and lower ends.

In an exemplary embodiment of the present invention, the main body 110 may be formed of iron or aluminum, and iron is preferred as the material of the main body 110 in terms of structural strength; however, the present invention is not limited thereto.

In addition, the body 110 may also have polar regions 113 and non-polar regions 114 alternately arranged on the inner surface of the body 110 in a direction perpendicular to the axial direction X of the frustum of a cone. In addition, the polar region 113 and the nonpolar region 114 may have the same width in the axis direction of the frustum of a cone. Here, the axial direction X of the truncated cone may refer to the height direction of the truncated circular cone.

On the inner surface of the main body 110, polar regions 113 and non-polar regions 114 are arranged alternately along the direction perpendicular to the axial direction X of the truncated cone. The main working principle is: when the main body 110 is rotating, when the molten When the non-polar polymer (for example, polypropylene) flows through the non-polar region 114 through the lumen of the main body 110, since the two have the same polarity, it has a higher adhesion to the non-polar polymer. The flow velocity at the interface where the non-polar polymer contacts the non-polar region 114 on the inner surface of the main body 110 is relatively low, and the internal velocity gradient distribution of the non-polar polymer is relatively large; when the non-polar polymer flows through the polar In zone 113, the adhesion force to the non-polar polymer is low, the interface flow velocity is fast, and the influence on the internal velocity gradient of the non-polar polymer is low. Therefore, when the non-polar polymer periodically flows through After the polar regions 113 and non-polar regions 114 are alternately arranged on the inner surface of the main body 110, the velocity gradient inside the main body 110 changes periodically, and this change can effectively improve the mixing efficiency. Here, since the working principle of the molten polar polymer flowing through the interior of the body 110 is basically the same as that of the molten non-polar polymer flowing through the interior of the main body 110 , it will not be described in detail.

In a traditional extruder, a screw is usually used for mixing, which will inevitably increase the maintenance and replacement process of the screw, so that the working efficiency of the existing extruder is relatively low. However, in the present invention, polar regions 113 and non-polar regions 114 are alternately arranged on the inner surface of the main body 110 along the direction perpendicular to the axial direction X of the truncated cone to replace the screw in the existing extruder. Improve work efficiency while ensuring mixing effect.

The main body 110 of the polymer kneading member 100 mainly has three influencing factors on the kneading effect of the polymer, including: the cross section of the truncated cone at the first end (that is, the first opening 111 ) and the second end. The ratio of the diameters of the cross-section of the frustum at the end (i.e., the second opening 112), the diameter of the cross-section of the frustum at the first end to the minimum distance from the first end to the second end (i.e., the frustum height) and the number of polar regions 113 and nonpolar regions 114 of the polymer kneading member 100.

It can be known through experiments that when the diameter ratio of the cross-section of the frustum at the first end to the cross-section of the frustum at the second end is too large, especially greater than 1:2.5, the frustum of the main body tends to become a cylinder, which means It will be unfavorable for the movement of the material from the first end (ie, the feed port) to the second end (ie, the discharge port) in the polymer mixing member 100; similarly, when the circular platform at the first end The diameter ratio of the cross-section of the cross-section to the cross-section of the truncated cone at the second end is reduced, especially when it is less than 1:10, the truncated cone of the main body tends to become a cone, which will cause the polymer mixing member 100 to rotate at a high speed. Transporting the internal molten material from the first end to the second end will not only increase energy consumption, but also increase the wear of the polymer mixing components. Therefore, in an exemplary embodiment of the present invention, the diameter ratio of the cross section of the frustum of a cone at the first end to the cross section of the frustum of a second end may be 1:2.5-1:10, preferably, may be 1:3.5-1:9, 1:4.5-1:8, 1:5.5-1:7, 1:4-1:7, 1:5-1:9 or 1:6-1:8.

Likewise, it can be seen through experiments that when the ratio of the diameter of the cross-section of the frustum of a cone at the first end to the minimum distance from the first end to the second end (that is, the height of the frustum of a cone) is too large, especially greater than At 1:10, the height of the circular platform of the main body 110 is too low, so that the mixing time of the material inside the main body 110 is short, and the mixing effect is not good; when the diameter of the cross-section of the circular platform at the first end is If the ratio of the minimum distance from the top to the second end is too small, especially when it is greater than 1:15, the height of the round table of the main body 110 is too large, and the mixing time of the material inside the main body 110 is longer, which is likely to cause the material to be mixed in the polymer. A large amount of accumulation in the component 100 is also unfavorable for the mixing effect. Therefore, in an exemplary embodiment of the present invention, the ratio of the diameter of the cross-section of the frustum of a cone at the first end to the minimum distance from the first end to the second end may be 1:10-1:15, Preferably, 1:9.5-1:14.5, 1:9-1:14, 1:8.5-1:13.5, 1:8-1:13, 1:7.5-1:12.5, 1:8-1:12 , 1:8.5-1:11.5, 1:9-1:11, 1:12-1:14 or 1:11-1:13.

Similarly, too many polar regions 113 and non-polar regions 114 of the polymer kneading member 100 will increase the manufacturing difficulty of the polymer kneading member, and because the polar regions 113 on the inner surface of the main body 110 The distance between the non-polar zone 114 and the non-polar zone 114 is small, which is not conducive to the transmission of the internal flow rate, making the mixing effect worse; The speed gradient change period becomes longer, which will also reduce the mixing effect. Usually the number of polar regions 113 or non-polar regions 114 is one-fifth of the minimum distance from the first end to the second end, expressed as: n=l/5, wherein n is the polar region 113 or the number of non-polar regions 114, l is the minimum distance from the first end to the second end. Furthermore, in non-limiting example embodiments of the present invention, the number of polar regions 113 and non-polar regions 114 may be substantially the same.

In an exemplary embodiment of the present invention, the polar region 113 on the inner surface of the body 110 may include a hydroxyl group, and the non-polar region 114 on the inner surface of the body 110 may include a long linear alkane of not less than 10 carbons. In the present invention, the polar region 113 and the non-polar region 114 on the inner surface of the main body 110 can be obtained by chemically modifying the inner surface of the main body 110 . The method of chemically modifying the inner surface of the body 110 to obtain the polar region 113 and the non-polar region 114 will be described in detail below.

First, a strong acid such as hydrochloric acid or sulfuric acid with a pH of 2 can be used to remove the oxide film on the inner metal surface of the main body 110, and rinse with water until the pH is neutral.

Next, wash the metal surface from which the oxide film has been removed with acetone to remove the grease that may remain on the metal surface, rinse it with clean water, and let it dry.

Then, the long straight-chain alkanes with not less than 10 carbons may be coated on a predetermined area of the inner metal surface of the main body 110 in an amount of 15g-20g per square meter of long-chain alkanes with not less than 10 carbons compound, then dried, the coated predetermined area is the non-polar area 114, and the area not coated with long straight-chain alkane compounds with not less than 10 carbons is the polar area 113, because the metal surface passes through After treatment, it can have a hydroxyl group, so the polar group in the polar region 113 is a hydroxyl group.

In an exemplary embodiment of the present invention, the long-chain alkane compound of not less than 10 carbons may be trimethylsiloxane of a long-chain alkane of not less than 10 carbons, such as n-dodecyltrimethoxy silane or n-hexadecyltrimethoxysilane, etc.; however, the present invention is not limited thereto.

The baffle 120 may be located in the inner cavity of the main body 110 at the second end of the main body 110 and spaced at equal intervals from the inner surface of the main body 110 to serve as a discharge port.

The baffle 120 may have a circular plate configuration, and when disposed at the second end of the main body 110 , the baffle 120 may be a concentric circle with a cross-section at the second end of the circular frustum.

In addition, the baffle 120 may be fixed on the inner surface at the second end of the main body 110 by a bracket via, for example, welding. However, the present invention is not limited thereto, for example, the baffle 120 may be fixed on the inner surface at the second end of the main body 110 by any suitable method.

The manufacturing method and evaluation criteria of the polymer kneading component 100 of the exemplary embodiment of the present invention will be described in detail below with examples and comparative examples.

[Manufacturing example]

Example 1

Use a strong acid of hydrochloric acid with a pH of 2 to remove the oxide film on the inner metal surface of the main body 110, and rinse it with water until the pH value is neutral; then, wash the metal surface from which the oxide film has been removed with acetone to remove possible residues on the metal surface. grease, and rinsed with clean water, and dried; then, on the predetermined area of the inner metal surface of the main body 110, n-dodecyltrimethoxysilane can be coated with n-dodecyltrimethoxysilane in an amount of 15g per square meter oxysilane, and then dried, the coated predetermined area is the non-polar area 114, and the area not coated with n-dodecyltrimethoxysilane is the polar area. Wherein, the diameter d ₁ of the cross section of the truncated cone at the first end portion=10cm, the diameter d ₂ of the cross section of the circular truncated portion at the second end portion=50cm, and the minimum distance from the first end portion to the second end portion is 1 = 100 cm.

Example 2

Except that the diameter d=80cm of the cross-section of the circular frustum at the second end, the minimum distance from the first end to the second end is l=120cm, the same method as the method of Example 1 is used to manufacture the polymer mixture. Refining components.

Example 3

Except that the diameter d=25cm of the cross-section of the circular frustum at the second end, the minimum distance from the first end to the second end is l=150cm, the same method as the method of Example 1 is used to manufacture the polymer mixture. Refining components.

Example 4

Except that the diameter d=100cm of the cross-section of the circular frustum at the second end, the minimum distance from the first end to the second end is l=130cm, the same method as that of example 1 is used to manufacture the polymer mixture. Refining components.

Comparative example 1

A polymer kneading member was manufactured in the same method as that of Example 1 except that the diameter of the cross-section of the truncated cone at the second end was d=13 cm.

Comparative example 2

A polymer kneading member was manufactured in the same method as that of Example 1 except that the diameter of the cross-section of the truncated cone at the second end was d = 140 cm.

Comparative example 3

The polymer kneading member was manufactured in the same manner as in Example 1, except that the minimum distance from the first end to the second end was l=25 cm.

Comparative example 4

The polymer kneading member was manufactured in the same manner as in Example 1 except that the minimum distance from the first end to the second end was l=190 cm.

[Evaluation example]

Usually, the blending effect of two polymer materials can be evaluated by measuring the Tg of the blend by DSC, that is, when two polymer materials are blended, if a Tg value is detected, it means that the blend The blending effect is better; on the contrary, if two Tg values are detected, it indicates that the blending effect is poor. Applying this simple criterion can evaluate the mixing effect of mixing equipment.

Evaluation of Example 1

Add molten polypropylene (PP) and low-density polyethylene (LDPE) with a mass ratio of 85:15 to the mixing member 100 of Example 1, and knead at 200°C, and then carry out DSC after kneading Determination. The measurement results are shown in Table 1 below.

Evaluation of Example 2 to Example 4 and Comparative Example 1 to Comparative Example 4

Examples 2 to 4 and Comparative Examples 1 to 4 were evaluated in the same manner as Example 1 was evaluated. The measurement results are shown in Table 1 below.

Table 1

d₁(cm) d₂(cm) l (cm) DSC measured value Example 1 10 50 100 1 Example 2 10 80 120 1 Example 3 10 25 150 1 Example 4 10 100 130 1 Comparative example 1 10 13 100 2 Comparative example 2 10 140 100 2 Comparative example 3 10 50 25 2 Comparative example 4 10 50 190 2

From Example 1 and Example 2 and Comparative Example 1 and Comparative Example 2, it can be seen that the ratio of the diameter d ₁ of the cross-section of the frustum of a cone at the first end to the diameter d ₂ of the cross-section of the cone at the second end is not In the range of 1:2.5-1:10, the blending effect is poor. From Example 3 and Example 4 and Comparative Example 3 and Comparative Example 4, it can be seen that when the diameter d ₁ of the cross-section of the frustum of a cone at the first end portion is compared to the diameter d ₂ of the cross-section of the frustum of a cone at the second end portion Or the ratio of the diameter of the cross-section of the truncated cone at the first end to the minimum distance from the first end to the second end is not within the optimum range, and the blending effect will be deteriorated.

Hereinafter, an extruder including the above-described polymer kneading member 100 according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 3 .

FIG. 3 is a schematic plan view showing an extruder according to an example embodiment of the present invention.

Referring to FIG. 3 , the extruder 10 according to an example embodiment of the present invention may include the polymer kneading member 100 , the charging part 200 and the discharging part 300 as described above.

The polymer kneading member 100 mentioned here is basically the same as the polymer kneading member described above, so it will not be described again.

The charging part 200 may be a device for adding materials to be kneaded into the polymer kneading member 100 . For example, the charging part 200 may include a heating cylinder 220 communicated with the first end of the polymer kneading member 100 (ie, the feed port) and an upper part of the heating cylinder 220, a feed port 210 for feeding and a The feed screw 230 inside the barrel 210 is heated. However, the utility model is not limited thereto, and the charging part 200 may include any suitable components, only the charging part 200 after the components are assembled can melt the material to be kneaded and transport the molten material to be kneaded to the high The inner cavity of the molecular kneading member 100 is sufficient.

The discharge unit 300 may be a device for discharging the molten material in the polymer kneading member 100 in a shaped manner. The discharge part 300 can communicate with the discharge port of the polymer mixing component 100 to receive the molten material, so as to discharge the molten material in a shaped form to complete the mixing of the material. In a non-limiting embodiment of the present invention, the discharge unit 300 may include any suitable components included in an existing extruder, such as a conveying component, a cooling component, a cutting component, and the like. It will not be described in detail here.

A method of extruding a polymer by the extruder 10 according to an exemplary embodiment of the present invention will be described in detail below.

The method for extruding a polymer according to the present invention includes adding materials into a mixing member and rotating the mixing member to mix the materials.

In the step of adding materials into the mixing member, the materials to be kneaded can be melted through the charging part 200 as described above, and then conveyed into the mixing member through the feeding screw 230 . The structure of the kneading member here is basically the same as that of the polymer kneading member 100 described above, so it will not be described again.

In the step of rotating the kneading member, the kneading member may be rotated about the axis of the circular table at a speed (for example, angular velocity) of the following formula 1.

Formula 1:

In Equation 1, ω represents the angular velocity at which the kneading member rotates, g represents the gravitational acceleration, and d represents the diameter of the cross-section of the truncated cone at the first end.

In addition, the method of extruding a polymer according to an exemplary embodiment of the present invention may further include ejecting the material in the kneading member in a shaped manner. The material in the kneading member can be discharged in a shaped manner through the discharge as described above.

To sum up, the polymer mixing member 100 according to the exemplary embodiment of the present invention can replace the screw structure in the existing extruder, thereby avoiding the replacement and maintenance of the screw, and reducing the time cost. In addition, the structure of the mixing member of the utility model is simple, which reduces the manufacturing cost. Moreover, the mixing effect of the polymer mixing member 100 of the present invention can reach the mixing effect of a screw extruder.

Claims (7)

1. A polymer kneading member with different adhesions, characterized in that, said polymer kneading member comprises: The main body has an inner cavity in the shape of a truncated cone, the main body has an open first opening as a feed inlet at the first end of the truncated circular cross-sectional area of the main body with the smallest cross-sectional area and a second end with the largest cross-sectional area of the circular truncated circular body of the main body having an open second opening at the top; and a baffle located in the cavity at the second opening and equally spaced from the inner surface of the main body to serve as a discharge port, Wherein, the body has polar regions and non-polar regions alternately arranged on the inner surface of the body in a direction perpendicular to the axial direction of the frustum of a cone. 2. Polymer mixing member as claimed in claim 1, is characterized in that, the diameter ratio of the cross-section of the truncated circle at the first end place and the cross-section of the truncated circle at the second end place is 1:2.5-1: 10. 3. The polymer mixing member according to claim 1 or 2, wherein the ratio of the diameter of the cross-section of the truncated cone at the first end to the minimum distance from the first end to the second end is 1:10-1:15. 4. The polymer kneading member according to claim 1, wherein the polar region and the nonpolar region have the same width in the axial direction of the truncated cone. 5. an extruder, is characterized in that, described extruder comprises: The polymer mixing member as claimed in any one of claims 1 to 4; a charging section for adding materials to the polymer mixing member; and The discharge part is used to discharge the materials in the polymer mixing member in a shaped manner, Wherein, the polymer mixing member is rotatably connected with the charging part and the discharging part. 6. The extruder according to claim 5, wherein the charging part comprises a heating cylinder communicated with the feed port of the polymer mixing member and a feeding screw located inside the heating cylinder. 7. The extruder according to claim 5, characterized in that, the discharge part communicates with the discharge port of the polymer mixing component.