Feeding system of extruder

Abstract

The utility model provides a feeding system of an extruder. The feeding system of the extruder comprises the extruder, a feeding hopper, a double-screw conveying scale and a weightlessness scale, an inlet of the feeding hopper is in butt joint with an outlet of the double-screw conveying scale and an outlet of the weightlessness scale, and an outlet of the feeding hopper is communicated with an inlet of the extruder. During feeding, materials and additives are respectively fed from an inlet of the feeding hopper and directly fall into an extruder through an outlet of the feeding hopper. According to the feeding system of the extruder, a single screw conveyor in the prior art is omitted, intermittent feeding of materials is achieved, and the stability of running current of the extruder is improved. Meanwhile, a belt weigher in the prior art is changed into the double-screw conveying weigher, so that the problems of powder accumulation and belt deviation of the belt weigher are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of extruder feeding systems, in particular to an extruder feeding system. Background Art

[0002] At present, the existing process flow of the extruder feeding system is: the PC flakes in the silo are transported to the single screw conveyor through a belt scale, and enter the extruder feeding hopper by gravity. Various additives are sent to the extruder feeding hopper through a twin-screw loss-in-weight scale, and PC flakes and additives enter the extruder together.

[0003] In the actual production process, problems such as discontinuous feeding of the extruder and powder accumulation inside the belt scale are prone to occur. In addition, the feeding hopper and the discharge pipe are prone to agglomeration and wall hanging. The above problems reduce the stability of the extruder feeding system.

[0004] Therefore, how to solve the defects of discontinuous feeding of the extruder and powder accumulation inside the belt scale is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] The utility model aims to provide an extruder feeding system, which can effectively avoid discontinuous feeding of the extruder and powder accumulation inside the belt scale.

[0006] In order to solve the above technical problems, the utility model provides an extruder feeding system, comprising: an extruder, a feeding hopper, a twin-screw conveying scale and a loss-in-weight scale;

[0007] The inlet of the extruder is communicated with the outlet of the feeding hopper;

[0008] The inlet of the feeding hopper is connected to the outlet of the twin-screw conveying scale and the outlet of the loss-in-weight scale respectively;

[0009] The twin-screw conveying scale is used to convey materials;

[0010] The loss-in-weight scale is used to deliver additives.

[0011] Optionally, the extruder feeding system further includes a feed pipe, wherein both ends of the feed pipe are respectively connected to the outlet of the feeding hopper and the inlet of the extruder.

[0012] Optionally, in the above extruder feeding system, a vibrating hammer is provided on the outer wall of the feeding hopper and / or the feeding pipe.

[0013] Optionally, in the above extruder feeding system, there are multiple vibrating hammers.

[0014] Optionally, in the above extruder feeding system, a chilled water jacket is provided on the outer wall of the feeding hopper and / or the feeding pipe, and the interior of the chilled water jacket is used to pass chilled water.

[0015] Optionally, in the above extruder feeding system, the vertical height between the twin-screw conveyor scale and the inlet of the feeding hopper ranges from 1m to 1.5m.

[0016] Optionally, in the above extruder feeding system, an inclined plate is provided at the inlet of the feeding hopper so that the material is dispersed at the inlet of the feeding hopper to flush the surroundings of the feeding hopper.

[0017] Optionally, in the above extruder feeding system, the inclination angle of the inclined plate ranges from 40° to 50°.

[0018] Optionally, in the above extruder feeding system, the number of the inclined plates is multiple.

[0019] The utility model provides an extruder feeding system, which has the following beneficial effects:

[0020] The inlet of the feeding hopper is connected to the outlet of the twin-screw conveyor scale and the outlet of the loss-in-weight scale respectively, and the outlet of the feeding hopper is connected to the inlet of the extruder. When feeding, the materials and additives are fed into the inlet of the feeding hopper respectively, and fall directly into the extruder through the outlet of the feeding hopper. The extruder feeding system removes the single screw conveyor in the prior art, solves the problem of intermittent material feeding, and improves the stability of the extruder operating current. At the same time, the belt scale in the prior art is changed to a twin-screw conveyor scale, which solves the problems of powder accumulation and belt deviation in the belt scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an extruder feeding system provided in an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of a feeding hopper provided in an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure of a twin-screw conveyor scale provided in an embodiment of the utility model;

[0025] Figure 4A schematic diagram of the structure of a loss-in-weight scale provided in an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of the structure of an extruder provided in an embodiment of the utility model;

[0027] Figure 6 A schematic diagram of the structure of a feeding hopper provided in an embodiment of the utility model (with a vibrating hammer, an inclined plate and a chilled water jacket);

[0028] Figure 7 A schematic structural diagram of another extruder feeding system provided in an embodiment of the utility model.

[0029] In the above picture:

[0030] 1-feeding hopper; 101-vibrating hammer; 102-inclined plate; 103-chilled water jacket;

[0031] 2-Twin screw conveyor scale;

[0032] 3- Loss-in-weight scale;

[0033] 4- Extruder;

[0034] 5-feeding pipe;

[0035] 6- Slide pipe. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The core of the utility model is to provide an extruder feeding system, which can effectively avoid discontinuous feeding of the extruder and powder accumulation inside the belt scale.

[0038] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Specifically, please refer to Figure 1-Figure 7 The utility model provides an extruder feeding system, comprising: an extruder 4, a feeding hopper 1, a twin-screw conveying scale 2 and a loss-in-weight scale 3.

[0040] The inlet of the extruder 4 is connected to the outlet of the feeding hopper 1. The inlet of the feeding hopper 1 is connected to the outlet of the twin screw conveyor scale 2 and the outlet of the loss-in-weight scale 3 respectively. The outlet of the twin screw conveyor scale 2 and the outlet of the loss-in-weight scale 3 can also be provided with a slide pipe 6 respectively, and connected to the inlet of the feeding hopper 1 through the slide pipe 6.

[0041] The twin screw conveyor scale 2 is used to convey materials. The loss-in-weight scale 3 is used to convey additives.

[0042] It should be noted that the twin screw conveyor scale 2 (also known as the twin screw loss-in-weight scale) delivers the material through two blade screws. The twin screws are installed on the scale platform, and the screws operate stably and reliably. The material of the screw and the scale platform can be 304 stainless steel, etc., which can be changed according to the customer's material properties. The twin screw conveyor scale 2 has the advantages of no material blocking, good performance, large conveying capacity, and no pollution.

[0043] The material may be PC flakes, and the additives may be various additives for mixing with PC flakes.

[0044] The present solution provides an extruder feeding system, wherein the inlet of the feeding hopper 1 is connected to the outlet of the twin-screw conveyor scale 2 and the outlet of the weight loss scale 3, respectively, and the outlet of the feeding hopper 1 is connected to the inlet of the extruder 4. During feeding, the materials and additives are fed into the inlet of the feeding hopper 1 respectively, and directly fall into the extruder 4 through the outlet of the feeding hopper 1. The extruder feeding system removes the single screw conveyor in the prior art, solves the problem of intermittent material feeding, and improves the stability of the operating current of the extruder 4. At the same time, the belt scale in the prior art is replaced with a twin-screw conveyor scale 2, which solves the problems of powder accumulation and belt deviation of the belt scale.

[0045] This solution also includes a feed pipe 5, the two ends of which are connected to the outlet of the feeding hopper 1 and the inlet of the extruder 4 respectively.

[0046] Specifically, the feeding hopper 1 is funnel-shaped as a whole, with an inlet located at the top and opening upward, and an outlet located at the bottom. The feeding pipe 5 is a straight pipe. The feeding hopper 1 and the feeding pipe 5 can be an integrally formed structure, or a split structure.

[0047] In order to prevent the additive from agglomerating on the wall after melting, a vibrating hammer 101 is provided on the outer wall of the feeding hopper 1 and / or the feeding tube 5. Under the continuous vibration of the vibrating hammer 101, the agglomerates on the inner wall of the feeding hopper 1 and / or the feeding tube 5 can be shaken off and quickly slide to the bottom of the feeding hopper 1 and enter the extruder 4 from the outlet.

[0048] There may be multiple vibrating hammers 101 , and the multiple vibrating hammers 101 may be arranged at different positions according to actual conditions.

[0049] Similarly, in order to further prevent the additive from agglomerating on the wall after melting, a chilled water jacket 103 is provided on the outer wall of the feeding hopper 1 and / or the feeding pipe 5. The interior of the chilled water jacket 103 is used to pass chilled water, and the chilled water is added to keep the temperature cold.

[0050] In a specific embodiment, the vertical height range between the twin-screw conveyor scale 2 and the inlet of the feeding hopper 1 is 1m-1.5m, which can ensure that all materials fall into the inlet of the feeding hopper 1 and that there is sufficient installation space between the twin-screw conveyor scale 2 and the feeding hopper 1.

[0051] In addition, the inlet of the feeding hopper 1 is provided with an inclined plate 102, so that the material is dispersed at the inlet of the feeding hopper 1 to flush the surroundings of the feeding hopper 1. The inclined plate 102 can be arranged below the outlet of the twin-screw conveying scale 2 to achieve precise docking.

[0052] Furthermore, the inclination angle of the inclined plate 102 is in the range of 40°-50°. Of course, the inclination angle of the inclined plate 102 may also be in other numerical ranges.

[0053] like Figure 1 As shown, a 45° inclined plate 102 is added inside the feeding hopper 1 to disperse the PC flakes in the feeding hopper 1 and flush the surroundings of the feeding hopper 1.

[0054] In a specific embodiment, there are multiple inclined plates 102 , and the multiple inclined plates 102 are arranged in the circumferential direction of the inlet of the feeding hopper 1 .

[0055] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In the description of this application, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0057] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0058] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0059] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An extruder feeding system, characterized in that: include: Extruders, feed hoppers, twin screw conveyor scales, and loss-in-weight scales; The inlet of the extruder is communicated with the outlet of the feeding hopper; The inlet of the feeding hopper is connected to the outlet of the twin-screw conveying scale and the outlet of the loss-in-weight scale respectively; The twin-screw conveying scale is used to convey materials; The loss-in-weight scale is used to deliver additives.

2. The extruder feeding system according to claim 1, characterized in that: It also includes a feed pipe, the two ends of which are respectively connected to the outlet of the feeding hopper and the inlet of the extruder.

3. The extruder feeding system according to claim 2, characterized in that: A vibrating hammer is arranged on the outer wall of the feeding hopper and / or the feeding pipe.

4. The extruder feeding system according to claim 3, characterized in that: The number of the vibrating hammers is multiple.

5. The extruder feeding system according to claim 2, characterized in that: A chilled water jacket is provided on the outer wall of the feeding hopper and / or the feeding pipe, and the interior of the chilled water jacket is used for passing chilled water.

6. The extruder feeding system according to claim 1, characterized in that: The vertical height between the twin screw conveyor scale and the inlet of the feeding hopper ranges from 1 m to 1.5 m.

7. The extruder feeding system according to claim 1, characterized in that: The inlet of the feeding hopper is provided with an inclined plate, so that the material is dispersed at the inlet of the feeding hopper to flush the surroundings of the feeding hopper.

8. The extruder feeding system according to claim 7, characterized in that: The inclination angle of the inclined plate ranges from 40° to 50°.

9. The extruder feeding system according to claim 7, characterized in that: The number of the inclined plates is plural.

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