Screw structure for HDPE (high-density polyethylene) processing
By optimizing the screw structure of HDPE processing equipment, adopting double thread design and improved mixing and fusion technology, the poor plasticization problem when the proportion of recycled and filled materials is solved, and a more thorough melting and fusion effect is achieved.
Patent Information
- Application Number
- CN202422596165.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-25
AI Technical Summary
When the proportion of recycled and filled materials in existing HDPE processing equipment is high, the plasticization effect of the melting section is poor.
A screw structure for HDPE processing is designed, including feeding section, compression section, melting front section, melting rear section and mixing fusion section. The double-thread structure and hole-type fusion technology are used to reduce the thread groove spacing and improve the mixing fusion method.
It improves the plasticization effect of plastic particles, ensures that the melting process is more thorough, and solves the problem of poor plasticization.
Smart Images
Figure CN223266232U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screw structures, in particular to a screw structure used for HDPE processing. Background Art
[0002] Currently, the equipment available on the market for low-pressure product manufacturing is largely derived from the conversion of high-pressure equipment. However, the low-pressure products produced by these devices fail to meet the expected quality standards in terms of design and performance. To effectively address this issue, a long-term and continuous production improvement process is necessary. The key lies in the continuous optimization of the screw structure to ensure that the final low-pressure products meet the established quality requirements.
[0003] At present, existing technologies mainly focus on maximizing unit output, so the screw structure is relatively simple and can only meet basic production needs. However, if you want to produce high-quality low-pressure products, the plasticizing effect is undoubtedly the primary consideration. The processing temperature of low-pressure raw materials is usually around 200 degrees. After the plastic particles enter the screw, they will first pass through the compression section, be compacted to become denser, and then enter the melting section for heating and melting. In the context of pursuing production efficiency, the thread groove design of the melting section of ordinary screws often has a large spacing. However, this design may lead to poor plasticizing effect when the proportion of recycled materials and fillers in the screw is too high. Because the melting temperature and melting speed of recycled materials and fillers may be different from those of virgin materials, when they are not fully mixed and melted in the melting section, poor plasticizing problems will occur.
[0004] At present, there is no effective solution to the problem that when the proportion of recycled materials and fillers in the screw is too high, the melting section of the screw is prone to poor plasticization effect. Utility Model Content
[0005] The purpose of the utility model is to address the deficiencies in the existing technology and provide a screw structure for HDPE processing to solve the problems existing in the related technology such as the phenomenon that the melting section of the screw is prone to poor plasticization effect when the proportion of recycled material and filler in the screw is too high.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] The utility model provides a screw structure for HDPE processing, comprising:
[0008] Screw body;
[0009] a screw head section, the screw head section being formed at the end of the screw body;
[0010] A feeding section is formed in the screw body and is located downstream of the screw head section, and the feeding section is a single-thread structure;
[0011] A compression section, formed in the screw body and located downstream of the feeding section, and having a double-thread structure;
[0012] A melting front section, which is formed on the screw body and located downstream of the compression section, and has a double-thread structure;
[0013] A rear melting section, which is formed on the screw body and located downstream of the front melting section, and has a single-thread structure;
[0014] The mixing and fusing section is formed on the screw body and is located downstream of the post-melting section, and is used to completely fuse the raw materials.
[0015] In some embodiments, the single thread structure of the feeding section includes:
[0016] A plurality of first threads are arranged at intervals along the length direction of the screw body.
[0017] In some embodiments, the distance between two adjacent first threads is 60 mm to 70 mm.
[0018] In some embodiments, the width of the first thread is 4 mm to 8 mm.
[0019] In some embodiments, the double-thread structure of the compression section includes:
[0020] a plurality of second threads, the plurality of second threads being sequentially spaced apart along the length direction of the screw body;
[0021] a plurality of third threads, wherein the plurality of third threads are sequentially spaced along the length direction of the screw body;
[0022] Wherein, the distance between adjacent second threads and third threads increases from the head end of the compression section to the tail end of the compression section.
[0023] In some embodiments, the distance between two adjacent second threads is 78 mm to 84 mm.
[0024] In some embodiments, the width of the second thread is 4 mm to 8 mm.
[0025] In some embodiments, the distance between two adjacent third threads is 81 mm to 87 mm.
[0026] In some embodiments, the width of the third thread is 2 mm to 6 mm.
[0027] In some embodiments, the double-thread structure of the front melting section includes:
[0028] a plurality of fourth threads, wherein the plurality of fourth threads are sequentially spaced along the length direction of the screw body;
[0029] a plurality of fifth threads, wherein the plurality of fifth threads are sequentially spaced apart in the length direction of the screw body;
[0030] The spacing between the adjacent fourth threads and the adjacent fifth threads increases from the head end of the front melting section to the tail end of the front melting section.
[0031] In some embodiments, the distance between two adjacent fourth threads is 78 mm to 84 mm, and the distance between two adjacent fourth threads at the end of the front melting section is 82 mm to 88 mm.
[0032] In some embodiments, the width of the fourth thread is 4 mm to 8 mm.
[0033] In some embodiments, the distance between two adjacent fifth threads is 81 mm to 87 mm.
[0034] In some embodiments, the width of the fifth thread is 2 mm to 6 mm.
[0035] In some embodiments, the single thread structure of the post-melting section includes:
[0036] A plurality of sixth threads are arranged at intervals along the length direction of the screw body.
[0037] In some embodiments, the distance between two adjacent sixth threads is 60 mm to 70 mm.
[0038] In some embodiments, the width of the sixth thread is 4 mm to 8 mm.
[0039] In some embodiments, the mixing and fusion section includes:
[0040] A mixing head area, the mixing head area is arranged downstream of the melting rear section;
[0041] a mixing screw region, the mixing screw region being disposed downstream of the mixing head region;
[0042] Wherein, the mixing screw area includes:
[0043] A plurality of fusion plates are provided, and the fusion plates are spaced apart along the length direction of the mixing screw region.
[0044] In some embodiments, the distance between two adjacent fusion plates is 25 mm to 35 mm.
[0045] In some embodiments, the mixing screw zone further comprises:
[0046] A plurality of fusion holes are arranged at intervals along the circumference of the corresponding fusion plate.
[0047] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:
[0048] The utility model discloses a screw structure for HDPE processing. By setting the thread structures on the compression section and the front melting section to double thread structures, the pitch of the thread grooves is reduced, the residence time of the plastic particles when passing through the melting section is prolonged, and the plasticization is more thorough, thereby solving the problem of poor plasticization. Furthermore, by changing the mixing and fusion section from the existing gear-type fusion to the hole-type fusion, the melted raw materials are forcibly decomposed into strips and then fused and decomposed again, resulting in a more thorough fusion effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0049] Figure 1 is a schematic diagram of a screw structure according to an embodiment of the present invention (1);
[0050] Figure 2 is a schematic diagram of the screw structure according to an embodiment of the present utility model (II);
[0051] Figure 3 Schematic diagram of a screw head section according to an embodiment of the present invention;
[0052] Figure 4 It is a schematic diagram of a mixing and fusion section according to an embodiment of the present utility model.
[0053] The figures are marked as follows: 100, screw body; 110, screw head section; 111, first screw head; 112, second screw head; 120, feeding section; 121, first thread; 130, compression section; 131, second thread; 132, third thread; 140, front melting section; 141, fourth thread; 142, fifth thread; 150, rear melting section; 151, sixth thread; 160, mixing and fusion section; 161, fusion plate; 162, fusion hole. DETAILED DESCRIPTION
[0054] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.
[0055] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.
[0056] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.
[0057] An illustrative embodiment of the present invention is as follows: Figure 1 As shown, a screw structure for HDPE processing includes a screw body 100, and the screw body 100 includes a screw head section 110, a feeding section 120, a compression section 130, a melting front section 140, a melting rear section 150 and a mixing and fusion section 160. Among them, the screw head section 110 is formed at the end of the screw body 100; the feeding section 120 is formed in the screw body 100 and is located downstream of the screw head section 110, and the feeding section 120 is a single-thread structure; the compression section 130 is formed in the screw body 100 and is located downstream of the feeding section 120, and the compression section 130 is a double-thread structure; the melting front section 140 is formed in the screw body 100 and is located downstream of the compression section 130, and the melting front section 140 is a double-thread structure; the melting rear section 150 is formed in the screw body 100 and is located downstream of the melting front section 140, and the melting rear section 150 is a single-thread structure; the mixing and fusion section 160 is formed in the screw body 100 and is located downstream of the melting rear section 150, for completely fusing the raw materials.
[0058] like Figure 2 and Figure 3 As shown, the screw head section 110 includes a first screw head 111 and a second screw head 112. The first screw head 111 and the second screw head 112 are arranged in a cylindrical structure, and the first screw head 111 and the second screw head 112 are integrally formed.
[0059] It should be noted that the circumferential side wall of the first screw head 111 has a plurality of teeth, and the plurality of teeth are formed around the circumferential side wall of the first screw head 111 .
[0060] In addition, a through hole is defined at the center of the first screw head 111 , and the axial direction of the through hole is the same as that of the first screw head 111 .
[0061] It should be noted that the diameter of the first screw head 111 is between 56 mm and 60 mm.
[0062] Preferably, the diameter of the first screw head 111 is 58 mm.
[0063] It should be noted that the length of the first screw head 111 is between 85 mm and 95 mm.
[0064] Preferably, the length of the first screw head 111 is 90 mm.
[0065] It should be noted that the second screw head 112 is coaxially connected to the first screw head 111 , and the second screw head 112 is located downstream of the first screw head 111 .
[0066] It should be noted that the diameter of the second screw head 112 is slightly larger than the diameter of the first screw head 111 .
[0067] It should be noted that the diameter of the second screw head 112 is between 62 mm and 66 mm.
[0068] Preferably, the diameter of the second screw head 112 is 64 mm.
[0069] It should be noted that the length of the second screw head 112 is the same as that of the first screw head 111 .
[0070] It should be noted that the length of the second screw head 112 is between 85 mm and 95 mm.
[0071] Preferably, the length of the second screw head 112 is 90 mm.
[0072] like Figure 2 As shown, the single thread structure of the feeding section 120 includes a plurality of first threads 121. The plurality of first threads 121 are spaced apart along the length direction of the screw body 100.
[0073] It should be noted that the first thread 121 is integrally formed on the screw body 100 .
[0074] It should be noted that the number of the first threads 121 on the screw body 100 is 6 to 10.
[0075] Preferably, the number of the first threads 121 on the screw body 100 is 7.
[0076] It should be noted that the length of the feeding section 120 is 440 mm to 460 mm.
[0077] Preferably, the length of the feeding section 120 is 450 mm.
[0078] It should be noted that the distance between two adjacent first threads 121 is 60 mm to 70 mm.
[0079] Preferably, the distance between two adjacent first threads 121 is 66 mm.
[0080] It should be noted that the width of the first thread 121 is 4 mm to 8 mm.
[0081] Preferably, the width of the first thread 121 is 6 mm.
[0082] It should be noted that the diameter of the screw structure of the feeding section 120 is 40 mm to 50 mm.
[0083] Preferably, the diameter of the screw structure of the feeding section 120 is 44 mm.
[0084] like Figure 2 As shown, the double-thread structure of the compression section 130 includes a plurality of second threads 131 and a plurality of third threads 132. The plurality of second threads 131 are sequentially spaced along the length of the screw body 100; the plurality of third threads 132 are sequentially spaced along the length of the screw body 100; and the spacing between adjacent second threads 131 and third threads 132 increases from the leading end of the compression section 130 to the trailing end of the compression section 130.
[0085] It should be noted that the second thread 131 is integrally formed on the screw body 100 .
[0086] It should be noted that the number of the second threads 131 on the screw body 100 is 4 to 8.
[0087] Preferably, the number of the second threads 131 on the screw body 100 is 6.
[0088] It should be noted that the third thread 132 is integrally formed on the screw body 100 .
[0089] It should be noted that the number of the third threads 132 on the screw body 100 is 4 to 8.
[0090] Preferably, the number of the third threads 132 on the screw body 100 is 6.
[0091] It should be noted that the second thread 131 and the third thread 132 are arranged in pairs on the screw body 100 , and the second thread 131 corresponds to the third thread 132 one by one.
[0092] Furthermore, the spacing between two adjacent fourth threads 141 is 78mm~84mm, and the spacing between two adjacent fourth threads 141 located at the end of the melting front section 140 is 82mm~88mm; preferably, the spacing between two adjacent second threads 131 is 81mm; preferably, the spacing between two adjacent fourth threads 141 located at the end of the melting front section 140 is 85mm.
[0093] It should be noted that the width of the second thread 131 is 4 mm to 8 mm.
[0094] Preferably, the width of the second thread 131 is 6 mm.
[0095] It should be noted that the distance between two adjacent third threads 132 is 81 mm to 87 mm.
[0096] Preferably, the distance between two adjacent third threads 132 is 84 mm.
[0097] It should be noted that the width of the third thread 132 is 2 mm to 6 mm.
[0098] Preferably, the width of the third thread 132 is 4 mm.
[0099] It should be noted that the length of the compression section 130 is 1000 mm to 1200 mm.
[0100] Preferably, the length of the compression section 130 is 1110 mm.
[0101] like Figure 2 As shown, the double-thread structure of the front melting section 140 includes a plurality of fourth threads 141 and a plurality of fifth threads 142. The fourth threads 141 are sequentially spaced along the length of the screw body 100; the fifth threads 142 are sequentially spaced along the length of the screw body 100; and the spacing between adjacent fourth threads 141 and fifth threads 142 increases from the leading end of the front melting section 140 to the trailing end of the front melting section 140.
[0102] It should be noted that the fourth thread 141 is integrally formed on the screw body 100 .
[0103] It should be noted that the number of the fourth threads 141 on the screw body 100 is 4 to 8.
[0104] Preferably, the number of the fourth threads 141 on the screw body 100 is 6.
[0105] It should be noted that the distance between two adjacent fourth threads 141 is 78 mm to 84 mm.
[0106] Preferably, the distance between two adjacent fourth threads 141 is 81 mm.
[0107] It should be noted that the distance between two adjacent fourth threads 141 at the end of the melting front section 140 is 82 mm to 88 mm.
[0108] Preferably, the distance between two adjacent fourth threads 141 at the end of the melting front section 140 is 85 mm.
[0109] It should be noted that the width of the fourth thread 141 is 4 mm to 8 mm.
[0110] Preferably, the width of the fourth thread 141 is 6 mm.
[0111] It should be noted that the fifth thread 142 is integrally formed on the screw body 100 .
[0112] It should be noted that the number of the fifth threads 142 on the screw body 100 is 4 to 8.
[0113] Preferably, the number of the fifth threads 142 on the screw body 100 is six.
[0114] It should be noted that the fourth thread 141 and the fifth thread 142 are arranged in pairs on the screw body 100 , and the fourth thread 141 corresponds to the fifth thread 142 one by one.
[0115] It should be noted that the distance between two adjacent fifth threads 142 is 81 mm to 87 mm.
[0116] Preferably, the distance between two adjacent fifth threads 142 is 84 mm.
[0117] It should be noted that the width of the fifth thread 142 is 2 mm to 6 mm.
[0118] Preferably, the width of the fifth thread 142 is 4 mm.
[0119] It should be noted that the length of the melting front section 140 is 1000 mm to 1200 mm.
[0120] Preferably, the length of the melting front section 140 is 1110 mm.
[0121] like Figure 2As shown, the single thread structure of the melting rear section 150 includes a plurality of sixth threads 151. The plurality of sixth threads 151 are spaced apart along the length direction of the screw body 100.
[0122] It should be noted that the sixth thread 151 is integrally formed on the screw body 100 .
[0123] It should be noted that the number of the sixth threads 151 on the screw body 100 is 1 to 5.
[0124] Preferably, the number of the sixth threads 151 on the screw body 100 is three.
[0125] It should be noted that the distance between two adjacent sixth threads 151 is 60 mm to 70 mm.
[0126] Preferably, the distance between two adjacent sixth threads 151 is 66 mm.
[0127] It should be noted that the width of the sixth thread 151 is 4 mm to 8 mm.
[0128] Preferably, the width of the sixth thread 151 is 6 mm.
[0129] It should be noted that the length of the post-melting section 150 is 150 mm to 170 mm.
[0130] Preferably, the length of the post-melting section 150 is 160 mm.
[0131] It should be noted that the diameter of the screw structure of the post-melting section 150 is 45 mm to 55 mm.
[0132] Preferably, the diameter of the screw structure of the post-melting section 150 is 52 mm.
[0133] like Figure 2 and Figure 4 As shown, the mixing and fusing section 160 includes a mixing head region and a mixing screw region. The mixing head region is located downstream of the post-melting section 150; the mixing screw region is located downstream of the mixing head region. The mixing screw region includes a plurality of fusing plates 161, which are spaced apart along the length of the mixing screw region.
[0134] It should be noted that a plurality of grooves are formed on the outer wall of the mixing head area, and the grooves are spaced apart along the circumference of the mixing head area, and the angle between the grooves and the axis of the mixing head area is 35 to 45 degrees.
[0135] Preferably, the angle between the groove and the axis of the mixing head area is 40 degrees.
[0136] It should be noted that the length of the mixing head area is 120 mm to 140 mm.
[0137] Preferably, the length of the mixing head zone is 130 mm.
[0138] It should be noted that the length of the mixing screw area is 300 mm to 340 mm.
[0139] Preferably, the length of the mixing screw zone is 320 mm.
[0140] It should be noted that the fusion plate 161 is provided in a circular ring structure, and the fusion plate 161 is integrally formed in the mixing screw area.
[0141] It should be noted that the number of fusion plates 161 is 3 to 7.
[0142] Preferably, the number of fusion plates 161 is five.
[0143] It should be noted that the distance between two adjacent fusion plates 161 is 25 mm to 35 mm.
[0144] Preferably, the distance between two adjacent fusion plates 161 is 30 mm.
[0145] It should be noted that the mixing screw region further includes a plurality of fusion holes 162 , wherein the plurality of fusion holes 162 are arranged at intervals along the circumference of the corresponding fusion plate 161 .
[0146] It should be noted that each fusion plate 161 has a plurality of fusion holes 162 , and the plurality of fusion holes 162 on each fusion plate 161 are spaced apart along the circumference thereof.
[0147] The advantage of this embodiment is that by setting the thread structure on the compression section and the front melting section to a double thread structure, the spacing of the thread grooves is reduced, the residence time of the plastic particles when passing through the melting section is prolonged and the plasticization is more thorough, thereby solving the problem of poor plasticization; furthermore, by changing the mixing and fusion section from the existing gear-type fusion to the hole-type fusion, the melted raw materials are forcibly decomposed into strips and then fused and decomposed again, and the fusion effect is more thorough.
[0148] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0149] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.
Claims
1. A screw structure for HDPE processing, characterized in that: include: Screw body; a screw head section, the screw head section being formed at the end of the screw body; A feeding section is formed in the screw body and is located downstream of the screw head section, and the feeding section is a single-thread structure; A compression section, formed in the screw body and located downstream of the feeding section, and having a double-thread structure; A melting front section, which is formed on the screw body and located downstream of the compression section, and has a double-thread structure; A rear melting section, which is formed on the screw body and located downstream of the front melting section, and has a single-thread structure; The mixing and fusing section is formed on the screw body and is located downstream of the post-melting section, and is used to completely fuse the raw materials.
2. The screw structure according to claim 1, characterized in that The single thread structure of the feeding section includes: A plurality of first threads are arranged at intervals along the length direction of the screw body.
3. The screw structure according to claim 2, characterized in that The distance between two adjacent first threads is 60 mm to 70 mm; and / or The width of the first thread is 4 mm to 8 mm.
4. The screw structure according to claim 1, characterized in that The double-thread structure of the compression section includes: a plurality of second threads, the plurality of second threads being sequentially spaced apart along the length direction of the screw body; a plurality of third threads, wherein the plurality of third threads are sequentially spaced apart along the length direction of the screw body; Wherein, the distance between adjacent second threads and third threads increases from the head end of the compression section to the tail end of the compression section.
5. The screw structure according to claim 4, characterized in that The distance between two adjacent second threads is 78 mm to 84 mm; and / or The width of the second thread is 4 mm to 8 mm; and / or The distance between two adjacent third threads is 81 mm to 87 mm; and / or The width of the third thread is 2 mm to 6 mm.
6. The screw structure according to claim 1, characterized in that The double-thread structure of the melting front section includes: a plurality of fourth threads, wherein the plurality of fourth threads are sequentially spaced along the length direction of the screw body; a plurality of fifth threads, wherein the plurality of fifth threads are sequentially spaced apart in the length direction of the screw body; Wherein, the spacing between adjacent fourth threads and fifth threads increases from the head end of the front melting section to the tail end of the front melting section; and / or The single thread structure of the melting rear section includes: A plurality of sixth threads are arranged at intervals along the length direction of the screw body.
7. The screw structure according to claim 6, characterized in that The distance between two adjacent fourth threads is 78 mm to 84 mm, and the distance between two adjacent fourth threads at the end of the front melting section is 82 mm to 88 mm; and / or The width of the fourth thread is 4 mm to 8 mm; and / or The distance between two adjacent fifth threads is 81 mm to 87 mm; and / or The width of the fifth thread is 2 mm to 6 mm; and / or The distance between two adjacent sixth threads is 60 mm to 70 mm.
8. The screw structure according to claim 1, characterized in that The mixing and fusion section comprises: a mixing head region, the mixing head region being arranged downstream of the post-melting section; a mixing screw region, the mixing screw region being disposed downstream of the mixing head region; Wherein, the mixing screw area includes: A plurality of fusion plates are provided, and the fusion plates are spaced apart along the length direction of the mixing screw region.
9. The screw structure according to claim 8, characterized in that The distance between two adjacent fusion plates is 25 mm to 35 mm.
10. The screw structure according to claim 8 or 9, characterized in that: The mixing screw area also includes: A plurality of fusion holes are arranged at intervals along the circumference of the corresponding fusion plate.