Production equipment capable of reducing production odor of thermoplastic elastomer
Through the combined design of the twin screw mechanism and vacuum exhaust port, the problem of heavy odor in the production process of thermoplastic elastomers is solved, and the full plasticization and odor removal of materials at low temperatures is achieved, and the product quality is improved.
Patent Information
- Application Number
- CN202421962958.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In the production process of thermoplastic elastomers, existing processes lead to heavy odor, especially when materials with high SEBS molecular content are difficult to plasticize and insufficient vacuum exhaust, resulting in heavy odor in the final product and affecting the consumer experience.
The twin screw mechanism is used to combine the vacuum exhaust port design, and the odor generation is reduced through the dual effects of low-temperature processing and the vacuum exhaust port. The twin screw mechanism includes pairs of screws, provided with shear sections and homogenization sections, and vacuum exhaust ports are provided in each section, and the material is transported at low temperatures and odor is discharged from the vacuum exhaust ports.
It effectively reduces the odor of thermoplastic elastomers, improves product quality, and improves consumer experience.
Smart Images
Figure CN223290096U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic production equipment, and more specifically relates to production equipment capable of reducing odor during the production of thermoplastic elastomers. Background Art
[0002] Thermoplastic elastomers are environmentally friendly, plasticizer-free polymers with excellent elasticity and flexibility. Existing processes for manufacturing thermoplastic elastomers have the following drawbacks: During extrusion, high processing temperatures can easily volatilize low-molecular substances and produce odors. When producing materials with a high SEBS molecular content (SEBS is a linear triblock copolymer with polystyrene as the terminal segment and an ethylene-butylene copolymer obtained by hydrogenating polybutadiene as the middle elastic block, exhibiting excellent stability and aging resistance), plasticization can be difficult, resulting in decreased material performance. Increasing the plasticization temperature can also result in a strong odor. Furthermore, insufficient vacuum exhaust can lead to poor odor removal. These issues can result in a strong odor in the final product, leading to a negative user experience for consumers. Utility Model Content
[0003] The main purpose of the utility model is to provide a production device that can reduce the odor of thermoplastic elastomer production, which can effectively reduce the generation of odor.
[0004] According to the first aspect of the present utility model, a production device that can reduce the odor of thermoplastic elastomer production is provided, including a machine base connected to a main cabinet, the machine base is provided with a feeding port, a twin-screw mechanism and a feeding port, one end of the twin-screw mechanism is connected to the feeding port, the middle part of the twin-screw mechanism is connected to the feeding port, the other end of the twin-screw mechanism is connected to the discharge port, the middle part of the twin-screw mechanism is also connected to a first vacuum exhaust port and a second vacuum exhaust port, the first vacuum exhaust port is arranged between the feeding port and the second vacuum exhaust port.
[0005] In a specific embodiment of the present invention, the twin-screw mechanism includes screws arranged in pairs and meshing with each other, the screws including a spline shaft, a plurality of threaded elements arranged on the spline shaft, and a plurality of shearing elements arranged on the spline shaft. According to the specifications and arrangement relationship of the threaded elements and the shearing elements, a first conveying section, a shearing section, a homogenizing section, and a second conveying section are formed in sequence from one end to the other end of the screw.
[0006] In a specific embodiment of the present invention, the first vacuum exhaust port is arranged between the shearing section and the homogenizing section, and the shearing section is connected to the first vacuum exhaust port through a first reverse threaded element; the second vacuum exhaust port is arranged between the homogenizing section and the second conveying section, and the homogenizing section is connected to the second vacuum exhaust port through a first reverse threaded element.
[0007] In a specific embodiment of the present invention, the shearing section is sequentially formed with a first shearing section, a second shearing section, a third shearing section and a fourth shearing section from one end close to the first conveying section to the other end, and anti-shear elements are provided in the second shearing section and the third shearing section.
[0008] In a specific embodiment of the present invention, the threaded element includes a third positive threaded element and a fourth positive threaded element, the first shearing segment is connected to the second shearing segment through the third positive threaded element, the second shearing segment is connected to the third shearing segment through the third positive threaded element, and the third shearing segment is connected to the fourth shearing segment through the fourth positive threaded element.
[0009] In a specific embodiment of the present invention, the shearing element includes a first shearing element, a second shearing element, a third shearing element, a fourth shearing element and a fifth shearing element, and the screw is sequentially provided with a first shearing element, a second shearing element, a third shearing element and a fourth shearing element in the first shearing section; the screw is sequentially provided with a third forward thread element, a second shearing element, a third shearing element, a fourth shearing element and a reverse shearing element in the second shearing section; the screw is sequentially provided with a second shearing element, a fifth shearing element and a reverse shearing element in the third shearing section; the screw is sequentially provided with a third forward thread element, a second shearing element and two fourth shearing elements in the fourth shearing section.
[0010] In a specific embodiment of the present invention, the threaded elements include a first threaded element, a right-angle threaded element, a transition threaded element, a first positive threaded element, a second positive threaded element and a third positive threaded element; the screw is sequentially provided with one first threaded element, three right-angle threaded elements, one transition threaded element, one first positive threaded element, one second positive threaded element and one third positive threaded element in the first conveying section; the screw is sequentially provided with two first positive threaded elements, two second positive threaded elements and two third positive threaded elements in the second conveying section.
[0011] In a specific embodiment of the present invention, the threaded elements include a first forward threaded element, a second forward threaded element and a third forward threaded element; the shearing elements include a second shearing element, a third shearing element, a fourth shearing element and a sixth shearing element; the screw is sequentially provided with one first forward threaded element, two third shearing elements, one sixth shearing element, one fourth shearing element, one second forward threaded element, one third forward threaded element, two second shearing elements, one third shearing element, one second shearing element, one second forward threaded element, one third forward threaded element and two second shearing elements in the homogenizing section.
[0012] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:
[0013] This production equipment, which can reduce the odor of thermoplastic elastomer production, puts the material in from the feeding port and adjusts the temperature and other parameters on the main cabinet. The material can be conveyed and plasticized at low processing temperature without affecting its performance. Then the equipment is started, and the material is plasticized by the twin-screw mechanism. While the material is plasticized, the odor is discharged from the two vacuum exhaust ports and mixed with another material in the feeding port. Finally, a low-odor, well-plasticized material is produced from the discharge port. This production equipment can effectively reduce the generation of material odor and improve the consumer experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0015] Figure 1 This is a schematic structural diagram of a production device capable of reducing odor during production of thermoplastic elastomers in one embodiment of the present invention;
[0016] Figure 2 It is a cross-sectional view of a screw in one embodiment of the present invention. DETAILED DESCRIPTION
[0017] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals 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 should not be understood as limiting the present invention.
[0018] In the description of the present invention, it should be understood that descriptions involving orientations, 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. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.
[0019] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.
[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.
[0022] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.
[0023] Reference Figures 1 to 2 As shown, a production device for reducing the odor of thermoplastic elastomer production is provided, including a base 2 connected to a main cabinet 1, and a feeding port 5, a twin-screw mechanism and a feeding port 7 are provided on the base 2. One end of the twin-screw mechanism is connected to the feeding port 5, the middle of the twin-screw mechanism is connected to the feeding port 7, and the other end of the twin-screw mechanism is connected to the discharge port 10. The middle of the twin-screw mechanism is also connected to a first vacuum exhaust port 8 and a second vacuum exhaust port 9, and the first vacuum exhaust port 8 is arranged between the feeding port 7 and the second vacuum exhaust port 9.
[0024] In this embodiment, the processing temperature is lowered on the main cabinet 1, and the material can be conveyed and plasticized at a low processing temperature without affecting its performance. The thermoplastic elastomer material is placed in the feeding port 5, and the first motor 3 and the second motor 4 are started to vibrate and convey the material from the feeding port 5 to the twin-screw mechanism for shearing. Then, another material is added to the feeding port 7 and conveyed to the twin-screw mechanism, and mixed and sheared together with the material entering the feeding port 5. Before reaching the discharge port 10, it passes through the first vacuum exhaust port 8 and the second vacuum exhaust port 9, which can effectively reduce the generation of odor, and finally a low-odor product is produced from the discharge port 10; the first motor 3 is used to drive the twin-screw mechanism, and the second motor 4 is used to vibrate and convey the material to the twin-screw mechanism through the feeding port 5 and the feeding port 7.
[0025] In one embodiment of the present invention, the twin-screw mechanism includes screws 6 arranged in pairs and meshing with each other, the screw 6 including a spline shaft, a plurality of threaded elements arranged on the spline shaft, and a plurality of shearing elements arranged on the spline shaft. According to the specifications and arrangement relationship of the threaded elements and the shearing elements, a first conveying section 61, a shearing section 62, a homogenizing section 63 and a second conveying section 64 are formed in sequence from one end to the other end of the screw 6.
[0026] Furthermore, the first vacuum exhaust port 8 is arranged between the shearing section 62 and the homogenizing section 63, and the shearing section 62 is connected to the first vacuum exhaust port 8 through a first reverse threaded element; the second vacuum exhaust port 9 is arranged between the homogenizing section 63 and the second conveying section 64, and the homogenizing section 63 is connected to the second vacuum exhaust port 9 through a first reverse threaded element. The area reserved for setting the first vacuum exhaust port 8 between the shearing section 62 and the homogenizing section 63 is the first section 80, and the area reserved for setting the second vacuum exhaust port 9 between the homogenizing section 63 and the second conveying section 64 is the second section 90. A first reverse threaded element is installed in front of the first vacuum exhaust port 8 and the second vacuum exhaust port 9. In order to prevent the material from overflowing from the vacuum exhaust port due to excessive shearing, preferably, the lead of the first reverse threaded element is 56 mm and the length is 28 mm, which can better prevent material overflow.
[0027] In one embodiment of the present invention, the shearing section 62 is formed with a first shearing section 621, a second shearing section 622, a third shearing section 623 and a fourth shearing section 624 in sequence from one end close to the first conveying section 61 to the other end. The second shearing section 622 and the third shearing section 623 are both provided with anti-shear elements. The two anti-shear elements increase the shearing of the material, improve the plasticizing effect, and push the difficult-to-plasticize material back for further plasticization; preferably, the staggered angle of the anti-shear element is 45 degrees, the number of shear discs of the anti-shear element is five, and the length of the anti-shear element is 44 mm, which effectively improves the plasticizing effect.
[0028] In one embodiment of the present invention, the threaded element includes a third positive threaded element and a fourth positive threaded element. The first shear segment 621 is connected to the second shear segment 622 through the third positive threaded element, the second shear segment 622 is connected to the third shear segment 623 through the third positive threaded element, and the third shear segment 623 is connected to the fourth shear segment 624 through the fourth positive threaded element. Preferably, the lead of the third positive threaded element is 44 mm and the length is 44 mm; the lead of the fourth positive threaded element is 56 mm and the length is 28 mm, which can effectively improve the plasticization of the material.
[0029] The shearing elements include a first shearing element, a second shearing element, a third shearing element, a fourth shearing element and a fifth shearing element. The screw 6 is sequentially provided with a first shearing element, a second shearing element, a third shearing element and a fourth shearing element in the first shearing section 621; the screw 6 is sequentially provided with a third forward thread element, a second shearing element, a third shearing element, a fourth shearing element and a reverse shearing element in the second shearing section 622; the screw 6 is sequentially provided with a second shearing element, a fifth shearing element and a reverse shearing element in the third shearing section 623; the screw 6 is sequentially provided with a third forward thread element, a second shearing element and two fourth shearing elements in the fourth shearing section 624. The material is sheared by multiple different types of shearing elements, so that the material can be fully plasticized and the mixing between various materials is enhanced.
[0030] Preferably, the staggered angle of the first shearing element is 30 degrees; the number of shear discs of the first shearing element is seven; the length of the first shearing element is 72 mm; the staggered angle of the second shearing element is 45 degrees; the number of shear discs of the second shearing element is five; the length of the second shearing element is 56 mm; the staggered angle of the third shearing element is 45 degrees; the number of shear discs of the third shearing element is five; the length of the third shearing element is 44 mm; the staggered angle of the fourth shearing element is 90 degrees; the number of shear discs of the fourth shearing element is five; the length of the fourth shearing element is 56 mm; the staggered angle of the fifth shearing element is 60 degrees; the number of shear discs of the fifth shearing element is four; the length of the fifth shearing element is 44 mm.
[0031] In one embodiment of the present invention, the threaded elements include a first threaded element, a right-angled threaded element, a transition threaded element, a first positive threaded element, a second positive threaded element and a third positive threaded element; the screw 6 is sequentially provided with a first threaded element, three right-angled threaded elements, a transition threaded element, a first positive threaded element, a second positive threaded element and a third positive threaded element in the first conveying section 61; the screw 6 is sequentially provided with two first positive threaded elements, two second positive threaded elements and two third positive threaded elements in the second conveying section 64, the first threaded element is the starting thread, which can prevent material from flowing back; due to the right-angled thread One side of the thread element is at a right angle, which improves the feeding of powdery fluffy materials. Since the lengths of the first positive thread element, the second positive thread element and the third positive thread element are successively reduced, the material is pressurized in the first conveying section 61, and the residence time of the mixed material before entering the twin-screw structure is gradually increased, thereby achieving the effect of pre-mixing of various materials. By continuously reducing the pitch of the thread elements on the second conveying section 64 and reducing the space of the material in the screw 6, the fully plasticized and degassed material is compressed, and a constant pressure is formed with the die head of the extruder, ensuring that the material is evenly extruded into a low-odor, well-plasticized product.
[0032] Preferably, the lead of the first thread element is 56 mm and the length is 56 mm; the lead of the right-angle thread element is 72 mm and the length is 72 mm, one side of the groove of the right-angle thread element is a right angle, and the right-angle thread element is a deep-groove threaded conveying element; the lead of the transition thread element is 72 mm and the length is 36 mm, and the transition thread element is a threaded dispersion and mixing element; the lead of the first forward thread element is 64 mm and the length is 64 mm; the lead of the second forward thread element is 56 mm and the length is 56 mm; the lead of the third forward thread element is 44 mm and the length is 44 mm.
[0033] In one embodiment of the present invention, the threaded element includes a first forward threaded element, a second forward threaded element and a third forward threaded element; the shearing element includes a second shearing element, a third shearing element, a fourth shearing element and a sixth shearing element; the screw 6 is sequentially provided with a first forward threaded element, two third shearing elements, a sixth shearing element, a fourth shearing element, a second forward threaded element, a third forward threaded element, two second shearing elements, a third shearing element, a second shearing element, a second forward threaded element, a third forward threaded element and two second shearing elements in the homogenizing section 63. The shearing elements and the threaded elements are staggered in the homogenizing section 63. The combination of shearing elements with increasing staggering angles provides sufficient shear heat for fully plasticizing the thermoplastic elastomer and the flame retardant, and continuously utilizes the strong shear force generated by the shearing elements to enhance the complete mixing of the melt and the flame retardant; the threaded elements are then staggered to release the heat generated when the melt passes through the shearing elements, prevent the flame retardant from decomposing under strong shear, achieve long-term and long-distance plasticization, and avoid the phenomenon of shear overheating, thereby obtaining a better product.
[0034] Preferably, the lead of the first forward thread element is 64 mm and the length is 64 mm; the lead of the second forward thread element is 56 mm and the length is 56 mm; the lead of the third forward thread element is 44 mm and the length is 44 mm; the staggered angle of the second shearing element is 45 degrees; the number of shear discs of the second shearing element is five; the length of the second shearing element is 56 mm; the staggered angle of the third shearing element is 45 degrees; the number of shear discs of the third shearing element is five; the length of the third shearing element is 44 mm; the staggered angle of the fourth shearing element is 90 degrees; the number of shear discs of the fourth shearing element is five; the length of the fourth shearing element is 56 mm; the staggered angle of the sixth shearing element is 90 degrees; the number of shear discs of the sixth shearing element is five; and the length of the fourth shearing element is 44 mm.
[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A production device capable of reducing the odor of thermoplastic elastomer production, comprising a base (2) connected to a main cabinet (1), characterized in that: The machine base (2) is provided with a feeding port (5), a twin-screw mechanism and a feeding port (7), one end of the twin-screw mechanism is connected to the feeding port (5), the middle of the twin-screw mechanism is connected to the feeding port (7), the other end of the twin-screw mechanism is connected to the discharge port (10), the middle of the twin-screw mechanism is also connected to a first vacuum exhaust port (8) and a second vacuum exhaust port (9), the first vacuum exhaust port (8) is arranged between the feeding port (7) and the second vacuum exhaust port (9), the twin-screw mechanism includes screws (6) arranged in pairs and meshing with each other, the screws (6) include a spline shaft, a plurality of threaded elements arranged on the spline shaft and a plurality of shearing elements arranged on the spline shaft. The screw rod (6) is a screw rod having a first conveying section (61), a shearing section (62), a homogenizing section (63) and a second conveying section (64) formed in sequence from one end to the other end according to the specifications and arrangement relationship of the screw rod (6). The first vacuum exhaust port (8) is arranged between the shearing section (62) and the homogenizing section (63). The shearing section (62) is connected to the first vacuum exhaust port (8) through a first reverse screw rod; the second vacuum exhaust port (9) is arranged between the homogenizing section (63) and the second conveying section (64). The homogenizing section (63) is connected to the second vacuum exhaust port (9) through a first reverse screw rod. The shearing section (62) is close to the first vacuum exhaust port (8). A first shearing section (621), a second shearing section (622), a third shearing section (623) and a fourth shearing section (624) are sequentially formed from one end to the other end of the first conveying section (61). The second shearing section (622) and the third shearing section (623) are both provided with anti-shearing elements. The threaded elements include a third positive threaded element and a fourth positive threaded element. The first shearing section (621) is connected to the second shearing section (622) through the third positive threaded element. The second shearing section (622) is connected to the third shearing section (623) through the third positive threaded element. The third shearing section (623) is connected to the fourth shearing section (624) through the fourth positive threaded element. The component comprises a first shearing element, a second shearing element, a third shearing element, a fourth shearing element and a fifth shearing element, wherein the screw rod (6) is provided with a first shearing element, a second shearing element, a third shearing element and a fourth shearing element in sequence in the first shearing section (621); the screw rod (6) is provided with a third forward thread element, a second shearing element, a third shearing element, a fourth shearing element and a reverse shearing element in sequence in the second shearing section (622); the screw rod (6) is provided with a second shearing element, a fifth shearing element and a reverse shearing element in sequence in the third shearing section (623);The screw rod (6) is provided with one third positive thread element, one second shear element and two fourth shear elements in sequence in the fourth shear section (624).
2. The production equipment capable of reducing the odor of thermoplastic elastomer production according to claim 1, characterized in that: The threaded elements include a first threaded element, a right-angle threaded element, a transition threaded element, a first positive threaded element, a second positive threaded element, and a third positive threaded element; the screw rod (6) is sequentially provided with one first threaded element, three right-angle threaded elements, one transition threaded element, one first positive threaded element, one second positive threaded element, and one third positive threaded element in the first conveying section (61); the screw rod (6) is sequentially provided with two first positive threaded elements, two second positive threaded elements, and two third positive threaded elements in the second conveying section (64).
3. The production equipment capable of reducing the odor of thermoplastic elastomer production according to claim 1, characterized in that: The threaded elements include a first forward threaded element, a second forward threaded element and a third forward threaded element; the shearing elements include a second shearing element, a third shearing element, a fourth shearing element and a sixth shearing element; the screw (6) is provided with one first forward threaded element, two third shearing elements, one sixth shearing element, one fourth shearing element, one second forward threaded element, one third forward threaded element, two second shearing elements, one third shearing element, one second shearing element, one second forward threaded element, one third forward threaded element and two second shearing elements in sequence in the homogenizing section (63).