An extruder for plastic pigments

Abstract

An extruder for plastic pigments, comprising an extrusion cavity, a modular die, a heating mechanism, a bearing mechanism, a screw structure, a driving system, a base, a feed inlet and a discharge outlet, the extrusion cavity and the bearing mechanism being connected to the upper part of the base, the modular die being connected to the front end of the extrusion cavity through a flange, the heating mechanism and the bearing mechanism being arranged on the front side of the extrusion cavity, the heating mechanism being connected to the lower end of the bearing mechanism, the screw structure being connected to the inside of the extrusion cavity, the driving system being connected to the screw structure, the feed inlet being connected to the upper part of the extrusion cavity, and the discharge outlet being connected to the modular die. Compared with the prior art, the extruder is provided with the modular die, and cooperates with the spiral flow distributor, so that the flow uniformity of the material in the extrusion process is greatly improved, the material flow characteristics can be accurately adjusted according to different pigment formula requirements, and the consistency of the finished product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of extrusion equipment, specifically to an extruder for plastic pigments. Background Technology

[0002] In the field of plastic pigment production, extruders are key equipment for heating, melting, and extruding raw materials into shapes. Traditional extruder dies typically employ an integral structure design with fixed internal flow channels, making it difficult to adjust for the rheological characteristics of different pigment formulations. This design has significant drawbacks when handling plastic pigments with varying viscosities and dispersion requirements: First, the fixed flow channel structure leads to uneven material flow rate distribution during extrusion, resulting in insufficient pigment particle dispersion and unstable product quality; second, the limited precision of internal temperature control within the die often leads to localized overheating or underheating, causing pigment discoloration or abnormal flowability; third, when changing to different product specifications or cleaning the die, the integral structure requires complete disassembly, which is cumbersome and time-consuming, severely impacting production efficiency. Furthermore, traditional dies lack effective flow equalization mechanisms, resulting in uneven cross-sectional properties of the extruded material, especially when handling high-filler or special pigment formulations. These technical limitations not only reduce product quality and consistency but also increase production costs and material waste, necessitating a modular die design that is flexible, temperature-controlled, easy to maintain, and possesses flow equalization capabilities to address these industry pain points.

[0003] To address the aforementioned issues, we have made a series of improvements. Utility Model Content

[0004] The purpose of this invention is to provide an extruder for plastic pigments to overcome the aforementioned shortcomings and deficiencies of the prior art.

[0005] An extruder for plastic pigments includes: an extrusion cavity, a modular die, a heating mechanism, a support mechanism, a screw structure, a drive system, a base, a feed inlet, and a discharge outlet. The extrusion cavity and the support mechanism are connected to the upper part of the base. The modular die is connected to the front end of the extrusion cavity via a flange. The heating mechanism and the support mechanism are located at the front side of the extrusion cavity. The heating mechanism is connected to the lower end of the support mechanism. The screw structure is connected to the interior of the extrusion cavity. The drive system is connected to the screw structure. The feed inlet is connected to the upper part of the extrusion cavity. The discharge outlet is connected to the modular die.

[0006] The modular die head includes: an outer shell layer, an intermediate flow channel layer, an adjustment layer, a threaded structure, a bayonet connection structure, a metal sealing ring, a heating groove, and a heating element. The outer shell layer, the intermediate flow channel layer, and the adjustment layer are located inside the modular die head. The outer shell layer is connected to the intermediate flow channel layer via the threaded structure, and the intermediate flow channel layer is connected to the adjustment layer via the bayonet connection structure. The metal sealing ring is located between the outer shell layer and the intermediate flow channel layer, and between the intermediate flow channel layer and the adjustment layer. The heating groove is located on the inner wall of the modular die head, and the heating element is connected to the heating groove.

[0007] Furthermore, the screw structure includes: a feed screw, a dispersion and mixing screw, a low-shear protection screw, a locking nut, a rectangular threaded groove, a diamond-shaped dispersion element, and a trapezoidal threaded groove. One end of the feed screw is connected to one end of the dispersion and mixing screw via the locking nut, and the other end of the feed screw is connected to the drive system. The other end of the dispersion and mixing screw is connected to one end of the low-shear protection screw via the locking nut, and the other end of the low-shear protection screw is connected to the front end of the extrusion chamber. The rectangular threaded groove is provided on the surface of the feed screw, the diamond-shaped dispersion element is connected to the surface of the dispersion and mixing screw, and the trapezoidal threaded groove is provided on the surface of the low-shear protection screw.

[0008] The beneficial effects of this utility model are:

[0009] Compared with traditional technologies, this invention greatly improves the uniformity of material flow during extrusion by adding a modular die head and a spiral flow distributor. Operators can precisely adjust the material flow characteristics according to different pigment formulation requirements, thereby improving the consistency of finished product quality. Attached image description:

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the modular mold head of this utility model.

[0012] Figure label:

[0013] The extrusion cavity 100, modular die head 200, outer shell layer 210, intermediate flow channel layer 220, adjustment layer 230, threaded structure 240, bayonet connection structure 250, metal sealing ring 260, heating groove 270 and heating element 280.

[0014] Heating mechanism 300, bearing mechanism 400, screw structure 500, feeding screw 510, dispersing and mixing screw 520, low shear protection screw 530, locking nut 540, rectangular thread groove 550, diamond-shaped dispersing element 560 and trapezoidal thread groove 570.

[0015] Drive system 600, base 700, feed inlet 800 and discharge outlet 900. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0017] Example 1

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the modular mold head of this utility model.

[0019] like Figure 1-2 As shown, an extruder for plastic pigments includes: an extrusion chamber 100, a modular die head 200, a heating mechanism 300, a supporting mechanism 400, a screw structure 500, a drive system 600, a base 700, a feed port 800, and a discharge port 900. The extrusion chamber 100 and the supporting mechanism 400 are connected to the upper part of the base 700. The modular die head 200 is connected to the front end of the extrusion chamber 100 via a flange. The heating mechanism 300 and the supporting mechanism 400 are located on the front side of the extrusion chamber 100. The heating mechanism 300 is connected to the lower end of the supporting mechanism 400. The screw structure 500 is connected to the inside of the extrusion chamber 100. The drive system 600 is connected to the screw structure 500. The feed port 800 is connected to the upper part of the extrusion chamber 100, and the discharge port 900 is connected to the modular die head 200.

[0020] The modular mold head 200 includes: an outer shell layer 210, an intermediate flow channel layer 220, an adjustment layer 230, a threaded structure 240, a bayonet connection structure 250, a metal sealing ring 260, a heating groove 270, and a heating element 280. The outer shell layer 210, the intermediate flow channel layer 220, and the adjustment layer 230 are located inside the modular mold head 200. The outer shell layer 210 is connected to the intermediate flow channel layer 220 through the threaded structure 240, and the intermediate flow channel layer 220 is connected to the adjustment layer 230 through the bayonet connection structure 250. The metal sealing ring 260 is located between the outer shell layer 210 and the intermediate flow channel layer 220, and between the intermediate flow channel layer 220 and the adjustment layer 230. The heating groove 270 is located on the inner wall of the modular mold head 200, and the heating element 280 is connected to the heating groove 270.

[0021] The screw structure 500 includes: a feed screw 510, a dispersing and mixing screw 520, a low-shear protection screw 530, a locking nut 540, a rectangular threaded groove 550, a diamond-shaped dispersing element 560, and a trapezoidal threaded groove 570. One end of the feed screw 510 is connected to one end of the dispersing and mixing screw 520 through the locking nut 540, and the other end of the feed screw 510 is connected to the drive system 600. The other end of the dispersing and mixing screw 520 is connected to one end of the low-shear protection screw 530 through the locking nut 540, and the other end of the low-shear protection screw 530 is connected to the front end of the extrusion cavity 100. The rectangular threaded groove 550 is provided on the surface of the feed screw 510, the diamond-shaped dispersing element 560 is connected to the surface of the dispersing and mixing screw 520, and the trapezoidal threaded groove 570 is provided on the surface of the low-shear protection screw 530.

[0022] The principle of this invention is as follows: First, the material enters the extrusion chamber 100 through the feed inlet 800, which has a funnel-shaped design. After entering the extrusion chamber 100, the material first contacts the feed screw 510. The feed screw 510 has a gradually changing pitch design, which gradually compacts the material as it moves forward. The drive system 600 transmits torque to the screw structure 500. After entering the dispersion and mixing screw 520, the material encounters a specially designed diamond-shaped dispersing element 560, which effectively breaks up pigment agglomerates and achieves uniform dispersion at the microscale. The fully dispersed material then enters the low-shear protection screw 530, which has a wide pitch design, significantly reducing secondary shear damage to the dispersed pigment.

[0023] Subsequently, the material enters the modular die head 200 from the low-shear protection screw 530. The modular die head features a three-layer structure, consisting of an outer shell layer 210, an intermediate flow channel layer 220, and an adjustment layer 230, combined via a precision-machined threaded structure 240 and a bayonet connection structure 250. The metal sealing ring 260 is made of copper alloy, maintaining good sealing and corrosion resistance during operation. The heating tank 270 is embedded in the inner wall of the modular die head 200, forming a closed-loop temperature control system with the heating element 280 to ensure the material remains at a constant temperature within the die head. This precise temperature control is crucial to preventing thermal degradation or discoloration of the pigment before discharge.

[0024] After being processed by the die head, the material is discharged from the outlet 900. The outlet 900 features a replaceable design, allowing for the selection of round, strip, or sheet-shaped outlet dies depending on different product requirements. The temperature of the outlet is precisely controlled within the discharge temperature window by an independent heating element 280, ensuring that the material exhibits ideal rheological properties during discharge. The support mechanism 400 provides stable support for the discharged material; its upper surface is precision-ground and coated with an anti-stick coating to prevent material adhesion. The heating mechanism 300 is connected to the lower end of the support mechanism 400, maintaining the temperature of the support surface at 60-80℃ to ensure uniform cooling of the material without surface defects.

[0025] This invention, by adding a modular die head and combining it with a spiral flow distributor, greatly improves the uniformity of material flow during the extrusion process. Operators can precisely adjust the material flow characteristics according to the requirements of different pigment formulations, thereby improving the consistency of finished product quality.

[0026] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.

Claims

1. An extruder for a plastic pigment, characterized in that, include: The system comprises an extrusion cavity (100), a modular die head (200), a heating mechanism (300), a support mechanism (400), a screw structure (500), a drive system (600), a base (700), an inlet (800), and an outlet (900). The extrusion cavity (100) and the support mechanism (400) are connected to the upper part of the base (700). The modular die head (200) is connected to the front end of the extrusion cavity (100) via a flange. The heating mechanism... The mechanism (300) and the bearing mechanism (400) are located on the front side of the extrusion cavity (100). The heating mechanism (300) is connected to the lower end of the bearing mechanism (400). The screw structure (500) is connected to the inside of the extrusion cavity (100). The drive system (600) is connected to the screw structure (500). The feed port (800) is connected to the upper part of the extrusion cavity (100). The discharge port (900) is connected to the modular die head (200). The modular mold head (200) includes: an outer shell layer (210), an intermediate flow channel layer (220), an adjustment layer (230), a threaded structure (240), a bayonet connection structure (250), a metal sealing ring (260), a heating groove (270), and a heating element (280). The outer shell layer (210), the intermediate flow channel layer (220), and the adjustment layer (230) are located inside the modular mold head (200). The outer shell layer (210) is connected to the intermediate flow channel layer (220) via the threaded structure (240). The intermediate flow channel layer (220) is connected to the regulating layer (230) through a bayonet connection structure (250). The metal sealing ring (260) is located between the outer shell layer (210) and the intermediate flow channel layer (220). The metal sealing ring (260) is located between the intermediate flow channel layer (220) and the regulating layer (230). The heating groove (270) is located on the inner wall of the modular mold head (200). The heating element (280) is connected to the heating groove (270).

2. The extruder for a plastic pigment according to claim 1, characterized in that: The screw structure (500) includes: a feed screw (510), a dispersing and mixing screw (520), a low-shear protection screw (530), a lock nut (540), a rectangular threaded groove (550), a diamond-shaped dispersing element (560), and a trapezoidal threaded groove (570). One end of the feed screw (510) is connected to one end of the dispersing and mixing screw (520) via the lock nut (540), and the other end of the feed screw (510) is connected to the drive system (600). The other end of the dispersing and mixing screw (520) is connected to one end of the low shear protection screw (530) via a locking nut (540). The other end of the low shear protection screw (530) is connected to the front end of the extrusion chamber (100). The rectangular threaded groove (550) is provided on the surface of the feed screw (510). The diamond-shaped dispersing element (560) is connected to the surface of the dispersing and mixing screw (520). The trapezoidal threaded groove (570) is provided on the surface of the low shear protection screw (530).

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