Mixing and anti-return structure, screw structure and injection molding device

Abstract

The present application provides a mixing check structure, a screw structure and an injection molding device. The mixing check structure includes: a rod body, a flow channel is constructed on the rod body, the flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel has a first port and a second port, the first port and the second port are respectively connected to the second sub-flow channel, so that the first sub-flow channel and the second sub-flow channel are arranged in parallel; the first sub-flow channel is used to guide the fluid, so that the fluid discharged along the first port can be mixed with the fluid flowing in the second sub-flow channel, and provide resistance that can hinder the flow of the fluid in the second sub-flow channel along a preset direction. The present application achieves mixing by guiding the first sub-flow channel and the second sub-flow channel to divert and merge the fluid, and guides the fluid in the first sub-flow channel to hinder the fluid in the second sub-flow channel to achieve the purpose of check. The mixing check structure has both mixing and check functions, so that one thing can be used for multiple purposes, and the number of parts of the product is reduced, and the product structure is simpler.

Description

Technical Field

[0001] The present application relates to the field of injection molding, and in particular to a mixing and reversing prevention structure, a screw structure and an injection molding device. Background Art

[0002] The existing screw is mainly composed of a screw body, a main screw wing, and a barrier mixing section. The barrier mixing section can provide a better dispersion mixing effect.

[0003] However, such a structure has its shortcomings: during the injection molding process, the plastic at the head of the screw body will flow back from the barrier mixing section to the main screw rib under the action of pressure, resulting in poor injection precision. To address this shortcoming, the prior art usually provides components such as check rings to prevent plastic backflow, but this results in a complex product structure and difficulty in ensuring assembly precision.

[0004] Application Contents

[0005] The purpose of the present application is to provide a mixing and anti-return structure, a screw structure and an injection molding device to solve the problem that the existing screw structure is complex and the assembly accuracy is difficult to ensure.

[0006] In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

[0007] The present application provides a mixing and backflow prevention structure, comprising:

[0008] A rod body, wherein a flow channel is configured on the rod body, wherein the flow channel comprises a first sub-flow channel and a second sub-flow channel, wherein the first sub-flow channel has a first port and a second port, wherein the first port and the second port are respectively connected to the second sub-flow channel, so that the first sub-flow channel and the second sub-flow channel are arranged in parallel;

[0009] The first sub-channel is used to guide the fluid so that the fluid discharged along the first port can mix with the fluid flowing in the second sub-channel and provide resistance that can hinder the flow of the fluid in the second sub-channel along a preset direction.

[0010] According to a technical solution of the present application, the first sub-channel is configured to enable a direction vector of the fluid discharged along the first port to form an angle greater than or equal to 90° with a direction vector of the fluid along the preset direction at the first port in the second sub-channel.

[0011] According to a technical solution of the present application, the first sub-channel is constructed into a bent shape, and the first sub-channel includes a first guide segment and a second guide segment. The first guide segment is a curved shape and transitions between the first port and the second guide segment. The second guide segment forms the second port at one end away from the first guide segment.

[0012] According to a technical solution of the present application, the first guide section includes a 180° elbow;

[0013] The second flow guiding section narrows in width from the second port toward the first flow guiding section.

[0014] According to a technical solution of the present application, the flow channel includes a plurality of the first sub-flow channels, the plurality of the first sub-flow channels are respectively arranged in parallel with the second sub-flow channels, and the plurality of the first sub-flow channels are arranged in sequence along the extension direction of the second sub-flow channel.

[0015] According to a technical solution of the present application, one or more of the first sub-channels are respectively arranged on two opposite sides of the second sub-channel;

[0016] The first sub-flow channel on one side of the second sub-flow channel is disposed correspondingly to the empty position between the adjacent first sub-flow channels on the other side of the second sub-flow channel.

[0017] According to a technical solution of the present application, the flow channel includes a plurality of the second sub-flow channels, and the plurality of the first sub-flow channels correspond one to one with the plurality of the second sub-flow channels;

[0018] The second sub-flow channel includes a third flow guide segment and a fourth flow guide segment, the third flow guide segment is communicated with the first port, and the fourth flow guide segment is communicated with the second port, so that each of the first sub-flow channels is connected in parallel with the corresponding second sub-flow channel;

[0019] The width of the third guide section widens from an end connected to the fourth guide section to an end away from the fourth guide section;

[0020] The width of the fourth guide section widens from an end connected to the third guide section to an end away from the third guide section.

[0021] According to a technical solution of the present application, a plurality of the flow channels are configured on the rod body, and the plurality of the flow channels are arranged side by side and at intervals;

[0022] A concave structure is arranged on the surface of the rod body, and the concave structure defines the flow channel.

[0023] The present application also provides a screw structure, comprising: a screw; and a mixing and non-return structure as described in any one of the above items, wherein one end of the mixing and non-return structure is connected to the screw.

[0024] The present application also provides an injection molding device, comprising: a screw structure as described in any of the above items.

[0025] In the plasticizing process of the present application, the fluid flows in the flow channel along the screw toward the direction of the mixing check structure, and when it flows to the bifurcation of the first sub-flow channel and the second sub-flow channel, part of the fluid continues to flow along the second sub-flow channel, while the other part is diverted to the first sub-flow channel along the first port; at the confluence of the first sub-flow channel and the second sub-flow channel, the fluid in the first sub-flow channel flows out through the second port and merges with the fluid in the second sub-flow channel, and the two fluids collide and mix with each other at the confluence. This mixing method generates less friction shear heat, making the fluid less susceptible to thermal decomposition, and the mixing effect is better, which is conducive to ensuring the appearance and quality of the injection molded product.

[0026] During the injection process, under the action of pressure, the fluid in the flow channel has a tendency to flow along the mixing check structure toward the screw, and when it flows to the bifurcation of the first sub-flow channel and the second sub-flow channel, part of the fluid continues to flow along the second sub-flow channel, while the other part is diverted to the first sub-flow channel along the second port; at the confluence of the first sub-flow channel and the second sub-flow channel, the fluid in the first sub-flow channel flows out through the first port and merges with the fluid in the second sub-flow channel. When the two fluids merge, the first sub-flow channel provides resistance that can hinder the flow of the fluid in the second sub-flow channel along the preset direction, so that the fluid discharged along the first port hinders the continued flow of the fluid in the second sub-flow channel under the action of inertia, so that the overall flow rate of the fluid slows down until it stagnates, achieving the effect of check, ensuring the injection pressure, avoiding the situation where the material does not fill the mold cavity, cannot be molded, etc., and improving the injection precision.

[0027] In summary, the mixing and non-return structure provided by the present application has both mixing and non-return functions, achieving multiple uses of one item. Compared with the existing method of setting a non-return ring on the screw, the present application reduces the number of parts of the product and has a simpler product structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0029] Figure 1 It is a schematic structural diagram of a mixing anti-reverse structure in a plasticizing condition according to one embodiment.

[0030] Figure 2 It is a schematic structural diagram of a mixing anti-return structure in an injection condition according to one embodiment.

[0031] Figure 3 It is a schematic diagram of a three-dimensional structure of a screw structure according to one embodiment.

[0032] The following are the descriptions of the reference numerals:

[0033] 10. Mixing check structure; 100. Rod body; 110. Flow channel; 111. First sub-flow channel; 111A. First port; 111B. Second port; 1111. First flow guide section; 1112. Second flow guide section;

[0034] 112, second sub-flow channel; 1121, third flow guide section; 1122, fourth flow guide section;

[0035] 120, first mouth; 130, second mouth; 140, diverter block;

[0036] 20. Screw structure; 210. Screw 210. DETAILED DESCRIPTION

[0037] Although the present disclosure can be easily embodied in different forms of embodiments, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the present disclosure and is not intended to limit the present disclosure to that described herein.

[0038] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present disclosure, rather than implying that each embodiment of the present disclosure must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0039] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the present disclosure are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indications of these directions also change accordingly.

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0041] The embodiment disclosed in the present application provides a mixing check structure 10, which can be assembled on a screw 210 to form a screw structure 20 together with the screw 210. The mixing check structure 10 is mainly used to mix the fluid during the plasticizing process, and can prevent the fluid from flowing back to the screw 210 along the mixing check structure 10 during the injection process.

[0042] Please refer to Figure 1 and Figure 2 ,in, Figure 1 The schematic diagram of the structure of the mixing anti-return structure 10 of the present application under the injection condition is shown. Figure 2 The schematic diagram of the structure of the mixing anti-reverse structure 10 of the present application under plasticizing conditions is shown.

[0043] The mixing check structure 10 includes a rod body 100. The rod body 100 is provided with a flow channel 110, which includes a first sub-flow channel 111 and a second sub-flow channel 112. The first sub-flow channel 111 has a first port 111A and a second port 111B. The first port 111A and the second port 111B are respectively connected to the second sub-flow channel 112. In this way, when the fluid flows through the first port 111A (or the second port 111B), a part of the fluid flows along the first sub-flow channel 111 and the other part flows along the second sub-flow channel 112. When the fluid in the second sub-flow channel 112 flows through the second port 111B (or the first port 111A), the divided fluids merge together again. The first sub-flow channel 111 and the second sub-flow channel 112 are arranged in parallel.

[0044] The first sub-channel 111 is used to guide the fluid so that the fluid discharged from the first port 111A can mix with the fluid flowing in the second sub-channel 112 and provide resistance to hinder the fluid flow in the second sub-channel 112 along a preset direction.

[0045] In more detail, Figure 2 As shown, during the plasticizing process, the fluid flows in the flow channel 110 along the screw 210 toward the mixing check structure 10, and when it flows to the bifurcation of the first sub-flow channel 111 and the second sub-flow channel 112 (or the first port 111A), a part of the fluid continues to flow along the second sub-flow channel 112 (see Figure 2 The other part is diverted to the first sub-channel 111 along the first port 111A (see Figure 2The fluid in the first sub-channel 111 flows out through the second port 111B and merges with the fluid in the second sub-channel 112, and the two fluids collide and mix with each other at the confluence. This mixing method generates less friction shear heat, making the fluid less likely to be decomposed by heat, and has a better mixing effect, which is conducive to ensuring the appearance and quality of the injection molded product.

[0046] During the injection process, Figure 1 As shown, under the action of pressure, the fluid in the flow channel 110 has a tendency to flow along the mixing check structure 10 toward the screw 210, and when it flows to the bifurcation of the first sub-flow channel 111 and the second sub-flow channel 112 (or the second port 111B), a part of the fluid continues to flow along the second sub-flow channel 112 (see Figure 1 The other part is diverted to the first sub-channel 111 along the second port 111B (see FIG. Figure 1 The first sub-channel 111 is a fluid that flows out of the first sub-channel 111 through the first port 111A and merges with the fluid in the second sub-channel 112. When the two fluids merge, the first sub-channel 111 provides resistance that can hinder the flow of the fluid in the second sub-channel 112 along a preset direction, so that the fluid discharged from the first port 111A hinders the continued flow of the fluid in the second sub-channel 112 under the action of inertia, so that the overall flow rate of the fluid slows down until it stagnates, achieving a non-return effect, ensuring the injection pressure, avoiding situations such as insufficient filling of the mold cavity and failure to form, and improving the injection molding accuracy.

[0047] Regarding the preset direction, in this embodiment, the preset direction refers to the flow direction of the fluid during the injection process, that is, the direction along the mixing check structure 10 toward the screw 210 , and the specific angle of the preset direction is limited by the shape and direction of the second sub-channel 112 .

[0048] In summary, the mixing and non-return structure 10 provided in this embodiment has both mixing and non-return functions, achieving multiple uses of one object. Compared with the existing method of setting a non-return ring on the screw 210, this embodiment reduces the number of parts of the product and has a simpler product structure.

[0049] In some embodiments, the first sub-channel 111 is configured to form an angle greater than or equal to 90° between a direction vector of the fluid discharged along the first port 111A and a direction vector of the fluid along a preset direction at the first port 111A in the second sub-channel 112 .

[0050] In more detail, when the first sub-channel 111 is configured to form an angle of 90° between the direction vector of the fluid discharged along the first port 111A and the direction vector of the fluid along a preset direction at the first port 111A in the second sub-channel 112, the force of the fluid discharged along the first port 111A is perpendicular to the force of the fluid along the preset direction at the first port 111A in the second sub-channel 112, so that the first sub-channel 111 has a better barrier effect.

[0051] When the first sub-channel 111 is configured to form an angle greater than 90° between the direction vector of the fluid discharged along the first port 111A and the direction vector of the fluid along a preset direction at the first port 111A in the second sub-channel 112, the fluid discharged along the first port 111A will generate a component force opposite to the preset direction and a component force perpendicular to the preset direction. It can be understood that the larger the angle, the greater the resistance that can be provided by the fluid discharged along the first port 111A, and the better the blocking effect of the first sub-channel 111, thereby effectively ensuring that the fluid does not reverse.

[0052] For further example, the first sub-channel 111 is configured to enable a direction vector of the fluid discharged along the first port 111A and a direction vector of the fluid along a preset direction at the first port 111A in the second sub-channel 112 to form an angle greater than or equal to 120°.

[0053] For further example, the first sub-channel 111 is configured to enable a direction vector of the fluid discharged along the first port 111A and a direction vector of the fluid along a preset direction at the first port 111A in the second sub-channel 112 to form an angle greater than or equal to 150°.

[0054] In some embodiments, the first sub-channel 111 is configured in a bent shape. More specifically, the first sub-channel 111 includes a first guide section 1111 and a second guide section 1112. The first guide section 1111 is in a curved shape and transitions between the first port 111A and the second guide section 1112. The second guide section 1112 forms a second port 111B at one end away from the first guide section 1111. In this way, the first sub-channel 111 is smoother. During the injection process, the resistance of the fluid in the first sub-channel 111 is smaller and the flow rate is greater. The greater the resistance that the fluid discharged along the first port 111A can provide, the better the anti-return effect. At the same time, during the plasticization process, the fluid can be easily guided to the second guide section 1112 through the first guide section 1111, and then guided to the second port 111B through the second guide section 1112, thereby avoiding the situation where the fluid is retained in the first sub-channel 111.

[0055] Of course, in other embodiments, those skilled in the art may also design the first sub-channel 111 to be constructed in a right-angle shape. Specifically, the first guide section 1111 is straight and transitions between the first port 111A and the second guide section 1112. The second guide section 1112 forms a second port 111B at one end away from the first guide section 1111.

[0056] Furthermore, the first flow guide section 1111 includes a 180° elbow, so that the fluid discharged from the first port 111A will generate a component force opposite to the preset direction and a component force perpendicular to the preset direction, so that the first sub-channel 111 has a better blocking effect.

[0057] In some embodiments, the width of the second guide section 1112 narrows from the second port 111B to the first guide section 1111. In this way, during the injection process, the fluid flows from the second guide section 1112 to the first guide section 1111 in the first sub-channel 111. Since the width of the second guide section 1112 narrows, the flow rate of the fluid guided by the second guide section 1112 gradually increases, so that the fluid discharged along the first port 111A has a greater speed and greater inertia, and thus the fluid discharged along the first port 111A can provide greater resistance, and the anti-return effect is better.

[0058] During the plasticizing process, the fluid flows from the first guide section 1111 to the second guide section 1112 in the first sub-channel 111. Since the width of the second guide section 1112 widens from the first guide section 1111 to the second port 111B, the flow rate of the fluid guided by the second guide section 1112 gradually decreases, so that the fluid discharged along the second port 111B is slower, thereby making the two fluids more fully mixed when they converge, and the mixing effect is better.

[0059] In some embodiments, the first flow guide section 1111 has a uniform width from the first port 111A to the second flow guide section 1112. In this way, the first flow guide section 1111 will not be too wide or too narrow, and while ensuring the flow rate of the fluid discharged from the first port 111A during the injection process, the fluid can more easily flow into the first sub-flow channel 111 along the first port 111A during the plasticization process, thereby ensuring the mixing effect.

[0060] In some embodiments, the flow channel 110 includes a plurality of first sub-flow channels 111 , the plurality of first sub-flow channels 111 are respectively arranged in parallel with the second sub-flow channels 112 , and the plurality of first sub-flow channels 111 are sequentially arranged along the extension direction of the second sub-flow channels 112 .

[0061] During the plasticization process, the multiple first sub-flow channels 111 realize multiple flow divisions and confluences of the fluid, so that the fluid is more fully mixed and the mixing effect is better. During the injection process, the multiple first sub-flow channels 111 realize multiple obstructions to the second sub-flow channel 112, so that the overall flow rate of the fluid is slowed down until it stagnates, thereby achieving non-return.

[0062] Furthermore, if Figure 1 and Figure 2 As shown, one or more first sub-channels 111 are respectively arranged on opposite sides of the second sub-channel 112. The first sub-channels 111 on one side of the second sub-channel 112 are arranged correspondingly to the empty positions between the adjacent first sub-channels 111 on the other side of the second sub-channel 112.

[0063] In this way, the first sub-flow channels 111 are staggeredly distributed on the opposite sides of the second sub-flow channel 112, so that during the plasticization process, the fluid is successively divided and merged along the two sides of the second sub-flow channel 112, and the mixing is more complete. During the injection process, the first sub-flow channels 111 on both sides block the fluid in the second sub-flow channel 112 from both sides of the second sub-flow channel 112, and the deceleration effect is better.

[0064] Furthermore, the flow channel 110 includes a plurality of second sub-flow channels 112, and the plurality of first sub-flow channels 111 correspond one to one with the plurality of second sub-flow channels 112. The second sub-flow channel 112 includes a third flow guide section 1121 and a fourth flow guide section 1122, the third flow guide section 1121 is connected to the first port 111A, and the fourth flow guide section 1122 is connected to the second port 111B, so that each first sub-flow channel 111 is connected in parallel with the corresponding second sub-flow channel 112.

[0065] The third guide section 1121 widens from one end connected with the fourth guide section 1122 to one end away from the fourth guide section 1122. In this way, during the plasticization process, the fluid in the second sub-channel 112 flows from the third guide section 1121 to the fourth guide section 1122, and the flow rate of the fluid in the third guide section 1121 gradually increases, so that the fluid has a greater impact force, so that the two fluids can collide and mix better at the confluence, and the mixing effect is better.

[0066] On the contrary, during the injection process, the fluid in the second sub-channel 112 flows along the fourth guide section 1122 toward the third guide section 1121 , and the flow velocity of the fluid in the third guide section 1121 gradually decreases, further improving the anti-return effect.

[0067] The fourth guide section 1122 is set to be wider from one end connected to the third guide section 1121 to one end away from the third guide section 1121. In this way, during the plasticization process, the fluid in the second sub-flow channel 112 flows along the third guide section 1121 to the fourth guide section 1122, and the fluid has a larger flow space in the fourth guide section 1122, thereby avoiding the situation where the fluid is retained due to the narrow width, and increasing the discharge flow of the fourth guide section 1122, so that the two fluids can be mixed more fully.

[0068] On the contrary, during the injection process, the fluid in the second sub-channel 112 flows along the fourth guide segment 1122 toward the third guide segment 1121 . The fourth guide segment 1122 has a larger inlet, which increases the amount of fluid flowing into the second sub-channel 112 .

[0069] Generally speaking, the second sub-channel 112 is narrowed and then widened from one third guide section 1121 along the fourth guide section 1122 to the third guide section 1121 of another second sub-channel 112. The flow rate and flow rate of the fluid are adjusted by multiple diameter changes in the second sub-channel 112.

[0070] In some embodiments, the rod body 100 is configured with a plurality of flow channels 110, which are arranged side by side and at intervals. The arrangement of the plurality of flow channels 110 increases the flow efficiency of the fluid and improves the effects of plasticization and backflow prevention.

[0071] In some embodiments, a concave structure is disposed on the surface of the rod body 100, and the concave structure defines the flow channel 110. This has a simple structure and is easy to process.

[0072] A specific embodiment

[0073] The present application provides a mixing check structure 10, which can effectively reduce mixing shear heat and improve injection accuracy. Furthermore, the mixing check structure 10 of the present application is used for U-PVC material. U-PVC is a heat-sensitive plastic with poor fluidity and is the main material for pipes and home decoration. Due to production needs, a certain proportion of fillers is often added to U-PVC. The larger the filling ratio, the higher the mixing effect required. The mixing check structure 10 provided in the present application can be well applied to U-PVC.

[0074] In more detail, the mixing and non-return structure 10 includes a rod body 100 , and the rod body 100 has a plurality of flow channels 110 evenly distributed along its radial direction. For example, the rod body 100 is provided with 6 to 10 flow channels 110 .

[0075] A plurality of diverter blocks 140 are provided in each flow channel 110, and the plurality of diverter blocks 140 divide the flow channel 110 into two parts, so that each flow channel 110 includes a first sub-channel 111 and a second sub-channel 112, and the first sub-channel 111 has a first port 111A and a second port 111B, and the first port 111A and the second port 111B are respectively connected to the second sub-channel 112, so that the first sub-channel 111 and the second sub-channel 112 are arranged in parallel.

[0076] The first sub-channel 111 is used to guide the fluid so that the fluid discharged from the first port 111A can mix with the fluid flowing in the second sub-channel 112 and provide resistance to hinder the fluid flow in the second sub-channel 112 along a preset direction.

[0077] The angle between the first port 111A of the first sub-channel 111 and the flow direction of the fluid in the second sub-channel 112 is less than 30°.

[0078] Furthermore, the flow channel has a first mouth 120 and a second mouth 130, and the first mouth 120 and the second mouth 130 are distributed along the axial direction of the rod body. The second sub-flow channel 112 is connected to the first mouth 120 and the second mouth 130. In this way, the fluid enters the flow channel 110 through the first mouth 120 (or the second mouth 130) and is diverted under the action of the diverter 140.

[0079] Compared with the existing structure, the advantages of the present application are: during the replasticization process, when the U-PVC flows through the mixing check structure 10, it is diverted by the first diverter block 140 to the first sub-channel 111 and the second sub-channel 112, and merges at the end of this diverter block 140, and then repeats the above process with the subsequent diverter block 140 until it flows out. Such a diversion process generates less shear heat and has a better mixing effect; during the injection molding process, due to the blocking effect of the plastic in the first sub-channel 111, the overall flow rate of the plastic continues to decrease until it stagnates, achieving a check effect and improving the injection molding accuracy.

[0080] like Figure 3 As shown, the present application further provides a screw structure 20 , including: a screw 210 ; a mixing check structure 10 as in any of the aforementioned embodiments, one end of the mixing check structure 10 is connected to the screw 210 .

[0081] The mixing and reversing check structure 10 can be assembled on the screw 210 and can rotate along with the rotation of the screw 210 . The fluid can flow along the mixing and reversing check structure 10 and be fully mixed under the action of the mixing and reversing check structure 10 .

[0082] In more detail, the screw 210 and the kneading check structure 10 are an integrated structure, or the screw 210 and the kneading check structure 10 are detachably connected.

[0083] A main screw ridge is formed on the peripheral wall of the screw 210 , and the peripheral wall of the screw 210 and the main screw ridge together constitute the main flow channel 110 of the plastic.

[0084] The cross-sectional dimensions of the main screw fins may be rectangular, sawtooth or trapezoidal.

[0085] Furthermore, the outer surfaces of the screw 210, the main screw fins and the mixing check section are all provided with a chrome-plated layer.

[0086] The present application also provides an injection molding device, comprising: a screw structure 20 as in any one of the aforementioned embodiments.

[0087] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the application, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A mixing and reversing prevention structure, characterized in that: include: A rod body, wherein a flow channel is configured on the rod body, wherein the flow channel comprises a first sub-flow channel and a second sub-flow channel, wherein the first sub-flow channel has a first port and a second port, wherein the first port and the second port are respectively connected to the second sub-flow channel, so that the first sub-flow channel and the second sub-flow channel are arranged in parallel; The first sub-channel is used to guide the fluid so that the fluid discharged along the first port can mix with the fluid flowing in the second sub-channel and provide resistance that can hinder the flow of the fluid in the second sub-channel along a preset direction.

2. The mixing and reversing prevention structure according to claim 1, characterized in that: The first sub-channel is configured to enable a direction vector of the fluid discharged along the first port and a direction vector of the fluid along the preset direction at the first port in the second sub-channel to form an angle greater than or equal to 90°.

3. The mixing and reversing prevention structure according to claim 1 or 2, characterized in that: The first sub-channel is configured in a bent shape, and includes a first guide segment and a second guide segment. The first guide segment is in a curved shape and transitions between the first port and the second guide segment. The second guide segment forms the second port at one end away from the first guide segment.

4. The mixing and reversing prevention structure according to claim 3, characterized in that: The first flow guide section includes a 180° elbow; The second flow guiding section narrows in width from the second port toward the first flow guiding section.

5. The mixing and reversing prevention structure according to claim 1 or 2, characterized in that: The flow channel includes a plurality of the first sub-flow channels, the plurality of the first sub-flow channels are respectively arranged in parallel with the second sub-flow channels, and the plurality of the first sub-flow channels are sequentially arranged along an extension direction of the second sub-flow channel.

6. The mixing and reversing prevention structure according to claim 5, characterized in that: One or more first sub-flow channels are respectively arranged on two opposite sides of the second sub-flow channel; The first sub-flow channel on one side of the second sub-flow channel is disposed correspondingly to the empty position between the adjacent first sub-flow channels on the other side of the second sub-flow channel.

7. The mixing and reversing prevention structure according to claim 5, characterized in that: The flow channel includes a plurality of the second sub-flow channels, and the plurality of the first sub-flow channels correspond to the plurality of the second sub-flow channels one by one; The second sub-flow channel includes a third flow guide segment and a fourth flow guide segment, the third flow guide segment is communicated with the first port, and the fourth flow guide segment is communicated with the second port, so that each of the first sub-flow channels is connected in parallel with the corresponding second sub-flow channel; The width of the third guide section widens from an end connected to the fourth guide section to an end away from the fourth guide section; The width of the fourth guide section widens from an end connected to the third guide section to an end away from the third guide section.

8. The mixing and reversing prevention structure according to claim 1 or 2, characterized in that: A plurality of the flow channels are configured on the rod body, and the plurality of the flow channels are arranged side by side and at intervals; A concave structure is arranged on the surface of the rod body, and the concave structure defines the flow channel.

9. A screw structure, characterized in that: include: Screw; The kneading non-return structure according to any one of claims 1 to 8, wherein one end of the kneading non-return structure is connected to the screw.

10. An injection molding device, characterized in that: include: The screw structure as claimed in claim 9.

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