A ternary boron compound alloy screw and a production process thereof

Abstract

The application relates to a ternary boron compound alloy screw rod and a production process thereof, and belongs to the technical field of alloy screw rods. The molten material block is arranged. When molten plastic flows through the molten material block, due to the structural features of the molten material block, the surface of the flowing molten plastic is turned to the bottom of the molten plastic, so that the bubbles located at the bottom of the molten plastic can be conveniently separated out, and the separation speed and efficiency of the bubbles of the molten plastic located in the deep screw groove are improved.

Description

Technical Field

[0001] This invention belongs to the field of alloy screw technology, specifically relating to a ternary boron compound alloy screw and its manufacturing process. Background Technology

[0002] Plastic or rubber products are common household items. Their raw materials are generally processed by screw extruders to form plastic or rubber products. That is, the raw materials for plastic or rubber products are added through the feed port of the screw extruder, and after being fully plasticized and uniformly mixed, they are discharged from the discharge port to form plastic products.

[0003] For example, the utility model patent with patent authorization announcement number CN219543980U discloses a high-efficiency extrusion screw for PP sheets in an extruder. By setting a second agitator, the second agitator agitates the liquid plastic, causing bubbles to precipitate. Because the pitch and screw groove of the deep section are large, more liquid plastic can be stored. Because the pitch and screw groove of the shallow section are smaller, bubbles in the liquid plastic in the shallow section precipitate. Through repeated operation, the number of bubbles in the liquid plastic is reduced, thus improving the extrusion quality.

[0004] Based on the search of patent grant announcement numbers and considering their shortcomings, the following was found:

[0005] Existing extruders typically have agitator blocks installed in the deep screw channel of the screw. When molten plastic flows through the agitator blocks, it moves relative to them, thus causing the agitator blocks to laterally agitate the molten plastic and precipitate bubbles. However, this only precipitates bubbles at the top of the molten plastic and cannot precipitate bubbles at the bottom. Therefore, the speed and efficiency of precipitating bubbles in the molten plastic within the deep screw channel using agitator blocks still need to be improved. Summary of the Invention

[0006] To address the issue that existing extruders typically have agitators installed in the deep screw channel of the screw, causing molten plastic to move relative to the agitator as it flows through, thus achieving lateral agitation and bubble precipitation, this invention provides a ternary boron compound alloy screw and its manufacturing process.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A ternary boron compound alloy screw includes a molten material section, which comprises a molten material shaft and several molten material blocks. The molten material shaft is provided with molten material threads, which are arranged around the circumferential sidewall of the molten material shaft with the same pitch along the axial direction of the molten material shaft. The maximum circumferential surface of the molten material threads is equal to the cross-section of the inner wall of the barrel. There is a molten material space between adjacent molten material threads. Several molten material blocks are arranged at equal intervals in the molten material space along the flow direction of the molten plastic. The molten material blocks are arranged on the circumferential sidewall of the molten material shaft and are used to flip the surface of the flowing molten plastic to the bottom of the molten plastic.

[0009] In a preferred embodiment of the present invention, the molten material block is inclined, the vertical height of the cross-section of the molten material block gradually increases along the flow direction of the molten plastic, and the vertical height of the cross-section of the molten material block is lower than the setting height of the molten material thread.

[0010] As a preferred embodiment of the present invention, the inclined end face of the molten material block is concave inward.

[0011] As a preferred embodiment of the present invention, it further includes a feeding section, which includes a feeding shaft with a feeding thread. The feeding thread is arranged around the circumferential sidewall of the feeding shaft with the same pitch along the axial direction of the feeding shaft. The feeding shaft is coaxially connected to the melting shaft. One end of the feeding thread and one end of the melting thread are fitted together. The maximum circumferential surface of the cross-sectional area of ​​the feeding thread is equal to the maximum circumferential surface of the cross-sectional area of ​​the melting thread.

[0012] As a preferred embodiment of the present invention, the feeding section further includes a plurality of stirring rods, the axial direction of the stirring rods being parallel to the axial direction of the feeding shaft, the plurality of stirring rods being uniformly arranged at equal angles around the central axis of the feeding shaft, and the stirring rods being interconnected with the feeding thread.

[0013] As a preferred embodiment of the present invention, it further includes an extrusion section, which includes an extrusion shaft coaxially disposed at the other end of the molten material shaft. The extrusion shaft is provided with an extrusion thread, which is arranged around the circumferential sidewall of the extrusion shaft with a gradually changing pitch along the axial direction of the extrusion shaft. The maximum circumferential surface of the cross-sectional area of ​​the extrusion thread is equal to the maximum circumferential surface of the cross-sectional area of ​​the molten material thread. One end of the extrusion thread and the other end of the molten material thread are fitted together.

[0014] As a preferred embodiment of the present invention, the pitch of the extrusion thread gradually decreases from the molten material shaft to the extrusion shaft, and the pitch of the extrusion thread closest to the molten material shaft is equal to the pitch of the molten material thread.

[0015] As a preferred embodiment of the present invention, the extrusion section further includes a plurality of extrusion blocks, the diameter of the extrusion shaft is larger than the diameter of the molten material shaft, there is an extrusion space between adjacent extrusion threads, the extrusion shaft is provided with a plurality of extrusion holes, the plurality of extrusion holes are equally spaced along the axial direction of the extrusion shaft in the extrusion space, and viewed from the central axis direction of the extrusion shaft, the plurality of extrusion holes are uniformly arranged at equal angles around the central axis of the extrusion shaft, the plurality of extrusion blocks are matched one-to-one with the plurality of extrusion holes, and any extrusion block is slidably disposed in the corresponding extrusion hole;

[0016] The extrusion section also includes a connecting plate, a cam rod, and a hydraulic rod. The extrusion shaft is hollow inside. The cam rod is non-rotatably coaxially disposed inside the extrusion shaft. The connecting plate is disposed on the inner wall of the extrusion shaft and is connected to the extrusion block. One end of the hydraulic rod is connected to the connecting plate, and the other end is rotatably connected to the circumferential surface of the cam rod.

[0017] The cam rod includes a base circle rod and a protruding rod. The central axis of the protruding rod is parallel to the central axis of the base circle rod. The protruding rod and the base circle rod are connected to each other. When the hydraulic rod slides on the circumferential surface of the protruding rod, the extrusion block extends out of the extrusion hole. When the hydraulic rod slides on the circumferential surface of the base circle rod, the extrusion block retracts into the extrusion hole.

[0018] As a preferred embodiment of the present invention, the materials of the feeding section, the melting section and the extrusion section are all made of ternary boron compounds.

[0019] A manufacturing process for a ternary boron compound alloy screw includes the following steps:

[0020] S1: Fabricate the aforementioned molten material shaft;

[0021] S2: Use a lathe to machine the molten material into threads;

[0022] S2: Produce several molten material blocks;

[0023] S3: Weld several molten material blocks to the corresponding positions of the molten material shaft.

[0024] The beneficial effects of this invention are as follows:

[0025] By incorporating a molten material block, the molten plastic flowing over it is flipped from its surface to its bottom due to the block's structural characteristics. This facilitates the release of air bubbles at the bottom of the molten plastic, improving the speed and efficiency of bubble release within the deep screw channel. This addresses the issue of existing extruders where the screw has an agitator block within the deep screw channel. While this block moves relative to the molten plastic as it flows over it, causing lateral agitation and bubble release, it only releases bubbles at the top of the molten plastic, failing to release bubbles at the bottom. Therefore, the speed and efficiency of bubble release within the deep screw channel using an agitator block still need improvement. Attached Figure Description

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is an overall schematic diagram of a ternary boron compound alloy screw according to the present invention;

[0028] Figure 2 This is a side view of a ternary boron compound alloy screw according to the present invention.

[0029] Explanation of main symbols

[0030] In the diagram: 1. Melting section; 101. Melting shaft; 102. Melting block; 103. Melting thread; 2. Feeding section; 201. Feeding shaft; 202. Feeding thread; 203. Stirring rod; 3. Extrusion section; 301. Extrusion shaft; 302. Extrusion thread; 303. Extrusion block; 304. Connecting plate; 305. Cam rod; 3051. Base circle rod; 3052. Protruding rod; 306. Hydraulic rod. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0032] Please see Figures 1-2This embodiment provides a ternary boron compound alloy screw, including a molten section 1. The molten section 1 includes a molten shaft 101 and several molten blocks 102. The molten shaft 101 is provided with molten threads 103, which are arranged around the circumferential sidewall of the molten shaft 101 with the same pitch along the axial direction of the molten shaft 101. The maximum circumferential surface of the molten thread 103 has a cross-sectional area equal to the cross-section of the inner wall of the barrel. There is a molten space between adjacent molten threads 103. Several molten blocks 102 are arranged at equal intervals in the molten space along the flow direction of the molten plastic. The molten blocks 102 are arranged on the circumferential sidewall of the molten shaft 101 and are used to flip the surface of the flowing molten plastic to the bottom of the molten plastic. By providing molten blocks 102, when the molten plastic flows through the molten blocks 102, After 02, due to the structural characteristics of the molten plastic block 102, the surface of the flowing molten plastic is flipped to the bottom of the molten plastic, which facilitates the precipitation of bubbles located at the bottom of the molten plastic. This improves the speed and efficiency of bubble precipitation in the molten plastic located in the deep screw channel. This solves the problem that existing extruders have agitator blocks installed in the deep screw channel. When the molten plastic flows past the agitator block, it moves relative to the agitator block, thus achieving lateral agitation of the agitator block in the molten plastic, thereby achieving bubble precipitation. However, this can only precipitate bubbles located at the top of the molten plastic, and cannot precipitate bubbles at the bottom of the molten plastic. Therefore, in practice, the speed and efficiency of bubble precipitation in the molten plastic located in the deep screw channel using agitator blocks still need to be improved.

[0033] Specifically, the structure of the molten material block 102 in this scheme is as follows: the molten material block 102 is inclined, and the vertical height of the cross-section of the molten material block 102 gradually increases along the flow direction of the molten plastic, and the vertical height of the cross-section of the molten material block 102 is lower than the setting height of the molten thread 103. With this arrangement, firstly, due to the size limitation of the molten thread 103, the volume of the molten plastic is equal to the space between the molten section 1 and the inner wall of the barrel. Therefore, the cross-sectional height of the molten plastic will also be higher than the cross-sectional height of the molten thread 103. When the molten plastic flows over the molten material block 102, the portion of the molten plastic above the molten material block 102 will continue to move, while the portion of the molten plastic below the molten material block 102 will slide along the inclined surface of the molten material block 102. Since the distance of sliding along the inclined surface of the molten material block 102 is greater than the distance of direct crossing... Because of the distance the molten plastic portion moves beyond the molten block 102, the portion above the molten block 102 will pass over it first, and after passing over it, the portion above the molten block 102 will move to the bottom before the next molten block 102. The portion of molten plastic that was originally below the molten block 102 will pass over it more slowly than the portion that was originally above the molten block 102. Therefore, the portion of molten plastic that was originally below the molten block 102 will stack on top of the portion that has already passed over the molten block 102 after passing over it. This achieves the effect that after passing over the molten block 102, the portion of molten plastic that was originally above the molten block 102 is now below the molten block 102, and the portion of molten plastic that was originally below the molten block 102 is now above the molten block 102.

[0034] Furthermore, it is worth noting that the inclined end face of the molten plastic block 102 in this design is concave inward. This design, on the one hand, can further increase the path for the molten plastic portion below the molten plastic block 102 to slide along the inclined end face of the molten plastic block 102; on the other hand, when the sliding of the molten plastic portion above the molten plastic block 102 conflicts with the movement of the molten plastic portion below the molten plastic block 102, due to the structural characteristics of the inclined surface of the molten plastic block 102, the molten plastic portion above the molten plastic block 102 slides past the molten plastic block 102 first.

[0035] Furthermore, this solution also includes a feeding section 2, which includes a feeding shaft 201. The feeding shaft 201 is provided with a feeding thread 202. The feeding thread 202 is arranged around the circumferential sidewall of the feeding shaft 201 with the same pitch along the axial direction of the feeding shaft 201. The feeding shaft 201 is coaxially connected to the melting shaft 101. One end of the feeding thread 202 is fitted with one end of the melting thread 103. The maximum circumferential surface area of ​​the cross-sectional area of ​​the feeding thread 202 is equal to the maximum circumferential surface area of ​​the cross-sectional area of ​​the melting thread 103. By providing the feeding section 2, the plastic is added into the feeding section 2. As the temperature inside the barrel rises, the solid plastic will transform into a molten state at high temperature, and then the molten plastic will be transported to the melting section 1 through the feeding shaft 201.

[0036] In addition, in practical applications, besides adding plastic into the barrel, other regulators are also added into the feeding section 2. In order to achieve uniform mixing of the regulator and the molten plastic, the feeding section 2 of this scheme also includes several stirring rods 203. The axial direction of the stirring rods 203 is parallel to the axial direction of the feeding shaft 201. The stirring rods 203 are evenly arranged at equal angles around the central axis of the feeding shaft 201. The stirring rods 203 are connected to the feeding thread 202. With the stirring rods 203, the stirring rods 203 will rotate with the feeding shaft 201 during the rotation of the feeding shaft 201, thereby achieving uniform mixing of the regulator and the molten plastic.

[0037] According to the above embodiments, the melting section 1 is designed not only to uniformly melt the plastic, ensuring that both the top and bottom plastics are in a molten state, but also to remove air bubbles from the top and bottom of the already molten plastic. However, due to the deep screw groove of the melting section 1, it is difficult to completely remove all air bubbles from the molten plastic within the melting section 1. Therefore, this solution also includes an extrusion section 3. The extrusion section 3 includes an extrusion shaft 301, which is coaxially disposed at the other end of the melting shaft 101. The extrusion shaft 301 is provided with an extrusion thread 302. The extrusion thread 302 is arranged around the circumferential sidewall of the extrusion shaft 301 with a gradually changing pitch along the axial direction of the extrusion shaft 301. The maximum circumferential surface of the cross-sectional area of ​​the extrusion thread 302 is equal to the maximum circumferential surface of the cross-sectional area of ​​the melting thread 103. One end of the extrusion thread 302... The other end of the extrusion thread 103 is fitted together with the extrusion section 3. Because the pitch of the extrusion thread 302 on the extrusion shaft 301 changes gradually, and the pitch of the extrusion thread 302 decreases from the molten material shaft 101 to the extrusion shaft 301, the pitch of the extrusion thread 302 closest to the molten material shaft 101 is equal to the pitch of the molten material thread 103. This setting makes the pressure increase after the molten plastic flows into the extrusion thread 302, and the air bubbles in the molten plastic on the extrusion shaft 301 are more likely to precipitate. It is also worth noting that in order to ensure that the air bubbles in the molten plastic on the extrusion shaft 301 precipitate more thoroughly, the diameter of the extrusion shaft 301 in this solution is larger than the diameter of the molten material shaft 101, which reduces the distance between the extrusion shaft 301 and the outermost ring of the extrusion thread 302, setting it as a "shallow section" commonly known in the industry.

[0038] Furthermore, to further ensure that all air bubbles in the molten plastic within the extrusion section 3 are extruded, the extrusion section 3 of this scheme also includes several extrusion blocks 303. The diameter of the extrusion shaft 301 is larger than the diameter of the molten material shaft 101. There is an extrusion space between adjacent extrusion threads 302. The extrusion shaft 301 has several extrusion holes, which are evenly spaced along the axial direction of the extrusion shaft 301 within the extrusion space. Viewed from the central axis of the extrusion shaft 301, the extrusion holes are evenly spaced around the central axis of the extrusion shaft 301 at equal angles. The extrusion blocks 303 and the extrusion holes are arranged in a certain manner. In a one-to-one matching manner, any extrusion block 303 can be slidably disposed in the corresponding extrusion hole. With the extrusion block 303 disposed, when the extrusion block 303 extends out of the extrusion hole along the axial direction of the corresponding extrusion hole, the extrusion block 303 will extrude the molten plastic located on the extrusion shaft 301. Since the extrusion section 3 is a "shallow section" at this time, the thickness of the molten plastic located there is small, and the extrusion block 303 can easily precipitate all the air bubbles in the molten plastic located at this position. Similarly, when the extrusion block 303 retracts into the corresponding extrusion hole, the molten plastic can flow normally.

[0039] Specifically, to control the sliding of the extrusion block 303, the extrusion section 3 of this solution also includes a connecting plate 304, a cam rod 305, and a hydraulic rod 306. The extrusion shaft 301 is hollow inside. The cam rod 305 is non-rotatably coaxially disposed inside the extrusion shaft 301. The connecting plate 304 is disposed on the inner wall of the extrusion shaft 301 and is connected to the extrusion block 303. One end of the hydraulic rod 306 is connected to the connecting plate 304, and the other end is rotatably connected to the circumferential surface of the cam rod 305. The cam rod 305 includes a base circle rod 305. 1. A protruding rod 3052 is provided, with its central axis parallel to the central axis of the base circle rod 3051. The protruding rod 3052 and the base circle rod 3051 are connected. A cam rod 305 is provided. When the hydraulic rod 306 slides on the circumferential surface of the protruding rod 3052, the extrusion block 303 extends out of the extrusion hole; when the hydraulic rod 306 slides on the circumferential surface of the base circle rod 3051, the extrusion block 303 retracts into the extrusion hole. It is worth mentioning that the function of the hydraulic rod 306 in this solution is to adjust its own length to adapt to extrusion shafts 301 of different sizes. In addition, since this solution is used in a high-temperature environment, in order to prevent the length of the extrusion block 303 or the cross-sectional width of the cam rod 305 from expanding due to high temperature during use, this solution adjusts the length of the hydraulic rod 306 in real time so that when the extrusion block 303 extends out of the corresponding extrusion hole, the top of the extrusion block 303 can always be in close contact with the side wall of the inner wall of the barrel.

[0040] It should also be noted that, in order to ensure the service life of the screw, the materials of the feeding section 2, the melting section 1 and the extrusion section 3 in this scheme are all made of ternary boron compounds. This setting can improve the working life of the screw.

[0041] A manufacturing process for a ternary boron compound alloy screw includes the following steps:

[0042] S1: Fabricate the melting shaft 101;

[0043] S2: Use a lathe to machine out a molten thread 103;

[0044] S3: Produce several molten material blocks 102;

[0045] S4: Weld several molten material blocks 102 to the corresponding positions on the molten material shaft 101.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A ternary boron compound alloy screw, characterized in that: The device includes a molten material section, which comprises a molten material shaft and several molten material blocks. The molten material shaft is provided with molten material threads, which are arranged around the circumferential sidewall of the molten material shaft with the same pitch along the axial direction of the molten material shaft. The maximum circumferential surface of the molten material threads is equal to the cross-sectional area of ​​the inner wall of the barrel. There is a molten material space between adjacent molten material threads. Several molten material blocks are arranged at equal intervals in the molten material space along the flow direction of the molten plastic. The molten material blocks are arranged on the circumferential sidewall of the molten material shaft and are used to flip the surface of the flowing molten plastic to the bottom of the molten plastic. It also includes a feeding section, which includes a feeding shaft with a feeding thread. The feeding thread is arranged around the circumferential sidewall of the feeding shaft with the same pitch along the axial direction of the feeding shaft. The feeding shaft is coaxially connected to the melting shaft. One end of the feeding thread and one end of the melting thread are fitted together. The maximum circumferential surface of the cross-sectional area of ​​the feeding thread is equal to the maximum circumferential surface of the cross-sectional area of ​​the melting thread. It also includes an extrusion section, which includes an extrusion shaft coaxially disposed at the other end of the molten material shaft. The extrusion shaft is provided with an extrusion thread, which is arranged around the circumferential sidewall of the extrusion shaft with a gradually changing pitch along the axial direction of the extrusion shaft. The maximum circumferential surface of the cross-sectional area of ​​the extrusion thread is equal to the maximum circumferential surface of the cross-sectional area of ​​the molten material thread. One end of the extrusion thread and the other end of the molten material thread are fitted together. The extrusion section further includes several extrusion blocks. The diameter of the extrusion shaft is larger than the diameter of the molten material shaft. There is an extrusion space between adjacent extrusion threads. The extrusion shaft has several extrusion holes. The several extrusion holes are equally spaced in the extrusion space along the axial direction of the extrusion shaft. From the central axis direction of the extrusion shaft, the several extrusion holes are evenly arranged around the central axis of the extrusion shaft at equal angles. The several extrusion blocks correspond one-to-one with the several extrusion holes. Any extrusion block can be slidably disposed in the corresponding extrusion hole. The extrusion section also includes a connecting plate, a cam rod, and a hydraulic rod. The extrusion shaft is hollow inside. The cam rod is non-rotatably coaxially disposed inside the extrusion shaft. The connecting plate is disposed on the inner wall of the extrusion shaft and is connected to the extrusion block. One end of the hydraulic rod is connected to the connecting plate, and the other end is rotatably connected to the circumferential surface of the cam rod. The cam rod includes a base circle rod and a protruding rod. The central axis of the protruding rod is parallel to the central axis of the base circle rod. The protruding rod and the base circle rod are connected to each other. When the hydraulic rod slides on the circumferential surface of the protruding rod, the extrusion block extends out of the extrusion hole. When the hydraulic rod slides on the circumferential surface of the base circle rod, the extrusion block retracts into the extrusion hole.

2. The ternary boron compound alloy screw according to claim 1, characterized in that: The molten material block is inclined, and the vertical height of the cross-section of the molten material block gradually increases along the flow direction of the molten plastic. The vertical height of the cross-section of the molten material block is lower than the setting height of the molten material thread.

3. The ternary boron compound alloy screw according to claim 1, characterized in that: The inclined end face of the molten material block is concave inward.

4. The ternary boron compound alloy screw according to claim 1, characterized in that: The feeding section also includes several stirring rods, the axial direction of which is parallel to the axial direction of the feeding shaft. The stirring rods are evenly arranged at equal angles around the central axis of the feeding shaft, and the stirring rods are connected to the feeding thread.

5. The ternary boron compound alloy screw according to claim 1, characterized in that: The pitch of the extrusion thread decreases gradually from the molten material shaft to the extrusion shaft, and the pitch of the extrusion thread closest to the molten material shaft is equal to the pitch of the molten material thread.

6. The ternary boron compound alloy screw according to claim 1, characterized in that: The materials used in the feeding section, the melting section, and the extrusion section are all made of ternary boron compounds.

7. A manufacturing process for a ternary boron compound alloy screw, applicable to the ternary boron compound alloy screw according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Fabricate the aforementioned molten material shaft; S2: Use a lathe to machine the molten material into threads; S3: Produce several molten material blocks; S4: Weld several molten material blocks to the corresponding positions of the molten material shaft.

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