Method for feeding molten material into injection molding device and assembly of injection molding device

Abstract

The invention provides a method for feeding a molten material into injection molding equipment and an assembly of the injection molding equipment, and belongs to the technical field of hot runner injection molding. The device comprises a body, the body is provided with a feeding port and a discharging port, the feeding port and the discharging port are communicated through an elbow-shaped channel, the elbow-shaped channel comprises a feeding channel, a connecting channel and a discharging channel, and the body is provided with a valve needle mounting hole which is connected with the connecting channel and used for mounting a valve needle capable of being arranged in the discharging channel. And a fluid reversing mechanism capable of enabling at least one part of fluid material to flow to one end opposite to the discharging end of the discharging channel in the connecting channel before the fluid material entering from the feeding hole reaches the connecting channel is arranged in the feeding channel, so that one part of the fluid material can continuously flow to the back surface of the valve needle and then enters the discharging channel. When the fluid material flows through the connecting channel, residues are not prone to being generated to block the connecting channel, the flow speed of the fluid material is high, and the residence time of the fluid material in the connecting channel is short.

Description

Technical Field

[0001] The invention belongs to the technical field of hot runner injection molding, and relates to a method for feeding molten material into injection molding equipment and components of the injection molding equipment. Background Art

[0002] In hot runner injection molding technology, the molten fluid material is input from the feed port of the injection molding equipment and output from the discharge port of the injection molding equipment along the feed channel and the discharge channel. The connecting channels connecting the feed channel and the discharge channel inside the injection molding equipment are mostly curved. Therefore, when the molten fluid material flows through the curved connecting channel, the flow rate slows down and it is easy to cause residue accumulation at the bend of the curved pipe, which will cause the connection pipeline to be blocked over time. After the connection pipeline is blocked, the residence time of the molten fluid material in the connection channel increases, the flow rate slows down, and the injection molding efficiency is greatly slowed down. In addition, the valve needle in the connecting pipeline used to adjust the flow rate of the injection nozzle will also be difficult to move and jammed due to the blockage of the connecting pipeline, which will also cause uneven discharge of the injection nozzle, affecting the effect of injection molding. Summary of the invention

[0003] The object of the present invention is to provide a method for feeding molten material into an injection molding device in view of the above problems.

[0004] Another object of the present invention is to provide a component of a molten material injection molding device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A component of a molten material injection molding device comprises a main body, on which is provided a feed port and a discharge port, the feed port and the discharge port being connected via an elbow channel, the elbow channel comprising a feed channel, a connecting channel and a discharge channel, the main body being provided with a valve needle mounting hole connected to the connecting channel for mounting a valve needle which can be arranged in the discharge channel, the feed channel being provided with a fluid reversing mechanism which can enable at least a portion of the fluid material entering the feed port to flow in the connecting channel to the end opposite to the discharge end of the discharge channel before reaching the connecting channel, thereby facilitating a portion of the fluid material to continuously flow to the back of the valve needle before entering the discharge channel.

[0007] The fluid reversing mechanism in the main body feed channel can enable at least a portion of the fluid material entering from the feed port to flow to the opposite end of the discharge channel in the connecting channel before reaching the connecting channel, so that a portion of the fluid material can continuously flow to the back of the valve needle and then enter the knife discharge channel. It can apply pressure to the residues accumulated in the connecting channel to reduce the residues remaining in the connecting channel, and can reduce the residence time of the fluid material in the connecting channel, can increase the flow rate of the fluid material and prevent blockage, can ensure that the fluid material flowing out of the discharge port is uniform and stable, greatly improves the injection molding efficiency, and can also enhance the fluid flow around the valve needle to prevent the valve needle from moving slowly due to fluid blockage.

[0008] In the components of the above-mentioned molten material injection molding equipment, the fluid reversing mechanism includes a slope arranged on the feed channel so that the cross-sectional area of ​​the feed channel can gradually decrease from the outer end to the inner end, and the extension line of the slope intersects with the central axis of the feed channel and is located on the curved portion of the connecting channel.

[0009] After the fluid material enters the feed channel, the cross-sectional area of ​​the feed channel gradually decreases from the outer end to the inner end due to the setting of the slope, causing the fluid material to turn and allowing at least a portion of the fluid material to flow to the opposite end of the discharge channel, thereby reducing the residue in the connecting channel, reducing the residence time of the fluid material in the connecting channel and enhancing the fluid flow around the valve needle.

[0010] In the above-mentioned assembly of the molten material injection molding equipment, the slope is also provided with a diversion structure capable of quickly diverting part of the fluid material to the two sides of the valve needle relative to the feed channel.

[0011] The diversion structure on the slope can quickly divert part of the fluid to the two sides of the valve needle relative to the feed channel. This part of the fluid enters the feed channel directly without passing through the large bend inner wall of the connecting channel, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle but bypasses the valve needle, reducing the impact force on the valve needle, which can enhance the fluid flow around the valve needle and make the fluid material flow faster.

[0012] In the above-mentioned components of the molten material injection molding equipment, the diversion structure includes guide grooves or channels arranged on both sides of the slope and gradually inclined upward from the outer end to the inner end, and the inclination direction is consistent with the slope.

[0013] The guide grooves or channels on both sides of the slope can quickly divert part of the fluid to the two sides of the valve needle relative to the feed channel. This part of the fluid enters the feed channel directly without passing through the large bend inner wall of the connecting channel, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle but bypasses the valve needle, reducing the impact force on the valve needle, which can enhance the fluid flow around the valve needle and make the fluid material flow faster.

[0014] In the above-mentioned assembly of the molten material injection molding equipment, the inner end of the guide groove is provided with an arc-shaped reversing segment, and the extension line of the inner end of the arc-shaped reversing segment intersects with the central axis of the discharge channel in the discharge direction of the discharge channel.

[0015] The arc-shaped reversing section arranged at the inner end of the guide groove plays a guiding role, and is used to quickly and directly guide part of the fluid material to the discharge channel, thereby reducing the risk of generating residues.

[0016] In the above-mentioned component of the molten material injection molding equipment, the inner end of the slope is located at the inner end of the feed channel or close to the inner end of the feed channel; the outer end of the slope is close to the inner wall of the feed channel.

[0017] The inner end of the slope is located at or close to the inner end of the feed channel, and the fluid material can flow quickly along the slope. The outer end of the slope is close to the inner wall of the feed channel so that part of the fluid material can quickly transition from the slope to the feed channel during the flow process, thereby ensuring the flow speed of the fluid material.

[0018] In the components of the above-mentioned molten material injection molding equipment, an arc-shaped outer chamfer is provided between the inner end of the slope and the discharge channel, and a flat section parallel to the central axis of the feed channel is provided between the arc-shaped outer chamfer and the slope; an inclined portion is provided between the slope and the guide groove.

[0019] The arc-shaped outer chamfer between the inner end of the slope and the discharge channel plays a guiding role, and the flat section between the arc-shaped outer chamfer and the slope plays a diversion role and slows down the flow speed of the fluid material flowing toward the arc-shaped outer chamfer, so that it flows into the feed channel along the guide of the arc-shaped outer chamfer, and the inclined portion plays a guiding role.

[0020] A method for feeding molten material into an injection molding device, including components of the molten material injection molding device, wherein a valve needle is inserted into a valve needle mounting hole, a connecting channel and a discharge channel, and after the fluid material enters the feed channel through a feed port, at least a portion of the fluid material is reversed by a fluid reversing mechanism before reaching the connecting channel, so that the fluid material flows in the connecting channel to the end opposite to the discharge end of the discharge channel, so that a portion of the fluid material continuously flows to the back of the valve needle and then enters the discharge channel.

[0021] Before the fluid material reaches the connecting channel, at least a portion of the fluid material is reversed through the fluid reversing mechanism and flows to the opposite end of the discharge channel, so that a portion of the fluid material can continuously flow to the back of the valve needle and then enter the discharge channel, which can apply pressure to the residues accumulated in the connecting channel to reduce the residues remaining in the connecting channel, and reduce the residence time of the fluid material in the connecting channel, thereby increasing the flow rate of the fluid material to prevent blockage, ensuring that the fluid material flowing out of the discharge port is uniform and stable, greatly improving the injection molding efficiency, and can also enhance the fluid flow around the valve needle to prevent the valve needle from moving slowly due to fluid blockage.

[0022] In the above-mentioned method of feeding molten material into injection molding equipment, the fluid reversing mechanism realizes the flow reversal of the fluid material by changing the axial inclination of a part of the inner wall of the feed channel.

[0023] After the fluid material enters the feed channel, the fluid reversing mechanism changes a portion of the axial inclination of the inner wall of the feed channel, causing the fluid material to turn and allowing at least a portion of the fluid material to flow to the opposite end of the discharge channel, thereby reducing residues in the connecting channel, reducing the residence time of the fluid material in the connecting channel, and enhancing the fluid flow around the valve needle.

[0024] In the above method of feeding molten material into injection molding equipment, diversion channels are respectively generated on both sides of the changed slope, so that the fluid material is diverted to both sides of the valve needle relative to the feed channel.

[0025] The diversion channels on both sides of the slope can quickly divert part of the fluid to the two sides of the valve needle relative to the feed channel. This part of the fluid enters the feed channel directly without passing through the large bend inner wall of the connecting channel, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle but bypasses the valve needle, reducing the impact force on the valve needle, which can enhance the fluid flow around the valve needle and make the fluid material flow faster.

[0026] Compared with the existing technology, the advantages of the present invention are: 1. When the fluid material flows through the connecting channel, it is not easy to generate residues to cause blockage of the connecting channel, and the fluid material has a fast flow rate and a short retention time in the connecting channel. 2. When the fluid material flows, the impact on the valve needle is small and the fluid flow around the valve needle can be enhanced to avoid fluid blockage. 3. The fluid material flowing out of the discharge port is uniform and stable, ensuring the quality of injection molding and improving the efficiency of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the manifold;

[0028] Figure 2 It is a schematic diagram of the structure of the entity;

[0029] Figure 3 It is a cross-sectional view of the body;

[0030] Figure 4 It is a schematic diagram of the slice structure of the entity in the three-dimensional view;

[0031] Figure 5 is a side view of the body;

[0032] Figure 6 yes Figure 5 Sectional view of midplane VI;

[0033] Figure 7 yes Figure 5 a cross-sectional view of midplane VII;

[0034] Figure 8 yes Figure 5 Sectional view of midplane VIII;

[0035] Fig. 9 yes Figure 5 Sectional view of midplane IX.

[0036] In the figure, the main body 1, the feed port 2, the discharge port 3, the elbow channel 4, the feed channel 5, the connecting channel 6, the discharge channel 7, the valve needle 8, the valve needle mounting hole 9, the fluid reversing mechanism 10, the diverter plate 11, the supply channel 12, the injection channel 13, the connecting pipe 14, the injection nozzle 15, the slope 16, the curved portion 17, the inner wall of the large bend 18, the diversion structure 19, the guide groove 20, the arc-shaped reversing section 21, the arc-shaped outer chamfer 22, the flat section 23, the inclined portion 24, and the valve needle sleeve mounting hole 25. DETAILED DESCRIPTION

[0037] like Figure 1-Figure 9 As shown, a component of a molten material injection molding device includes a main body 1, on which a feed port 2 and a discharge port 3 are provided, the feed port 2 and the discharge port 3 are connected through an elbow channel 4, the elbow channel 4 includes a feed channel 5, a connecting channel 6 and a discharge channel 7, the main body 1 is provided with a valve needle mounting hole 9 connected to the connecting channel 6 for mounting a valve needle 8 that can be set in the discharge channel 7, the feed channel 5 is provided with a fluid reversing mechanism 10 that can enable at least a portion of the fluid material entering from the feed port 2 to flow to the end opposite to the discharge end of the discharge channel 7 in the connecting channel 6 before reaching the connecting channel 6, so that a portion of the fluid material can continuously flow to the back of the valve needle 8 and then enter the discharge channel 7.

[0038] In the present invention, the valve needle mounting hole 9 and the discharge channel 7 are coaxially arranged, and the molten material injection molding device includes a manifold 11, and the manifold 11 is internally provided with a plurality of supply channels 12 distributed along the X axis and an injection channel 13 distributed along the Y axis, and the injection channel 13 and the supply channel 12 are connected by a connecting pipe 14, and the bottom end of the injection channel 13 is connected to an injection nozzle 15, and the body 1 is installed in the connecting pipe 14 to occupy the connecting pipe 14, and the feed channel 5 and the discharge channel 7 of the body 1 are respectively connected to the supply channel 12 and the discharge channel 7 of the body 1. The supply channel 12 and the injection channel 13 are arranged correspondingly and coaxially. Therefore, when the molten material from the supply channel 12 enters the feed port 2 of the main body 1, it passes through the feed channel 5, the connecting channel 6 and the discharge channel 7 and flows out from the discharge port 3 of the main body 1 to the injection channel 13. The valve needle 8 is installed in the valve needle mounting hole 9. A valve needle sleeve is provided on the top of the valve needle 8. A valve needle sleeve mounting hole 25 for mounting the valve needle sleeve is provided on the top of the main body 1. The valve needle 8 can control the closing of the injection nozzle 15 to adjust the injection flow rate of the molten material.

[0039] The fluid reversing mechanism 10 in the feed channel 5 of the main body 1 can enable at least a portion of the fluid material entering from the feed port 2 to flow to the opposite end of the discharge channel 7 in the connecting channel 6 before reaching the connecting channel 6, so that a portion of the fluid material can continuously flow to the back of the valve needle 8 and then enter the knife discharge channel 7. It can apply pressure to the residues accumulated in the connecting channel 6 to reduce the residues remaining in the connecting channel 6, and can reduce the residence time of the fluid material in the connecting channel 6, can increase the flow rate of the fluid material and prevent blockage, can ensure that the fluid material flowing out of the discharge port 3 is uniform and stable, greatly improves the injection molding efficiency, and can also enhance the fluid flow around the valve needle 8 to prevent the valve needle 8 from moving slowly due to fluid blockage.

[0040] Specifically, combined with Figure 3-Figure 9 As shown, the fluid reversing mechanism 10 includes a slope 16 arranged on the feed channel 5 so that the cross-sectional area of ​​the feed channel 5 can gradually decrease from the outer end to the inner end, and the extension line of the slope 16 intersects with the central axis of the feed channel 5 and is located on the curved portion 17 of the connecting channel 6.

[0041] The valve needle mounting hole 9 is provided above the curved portion 17 of the connecting passage 6. More specifically, in this embodiment, the extended line of the slope 16 is located on the inner wall 18 of the large curve of the curved portion 17.

[0042] After the fluid material enters the feed channel 5, the cross-sectional area of ​​the feed channel 5 gradually decreases from the outer end to the inner end due to the setting of the slope 16, so that the fluid material is turned and at least a part of the fluid material can flow to the opposite end of the discharge channel 7, so as to reduce the residue in the connecting channel 6, reduce the residence time of the fluid material in the connecting channel 6 and enhance the fluid flow around the valve needle 8.

[0043] Preferably, combined Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the slope 16 is also provided with a diversion structure 19 which can quickly divert part of the fluid material to the two sides of the valve needle 8 relative to the feed channel 5 .

[0044] The diversion structure 19 on the slope 16 can quickly divert part of the fluid to the two sides of the valve needle 8 relative to the feed channel 5. This part of the fluid directly enters the feed channel 5 without passing through the large curved inner wall 18 of the connecting channel 6, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle 8 but bypasses the valve needle 8, reducing the impact force on the valve needle 8, which can enhance the fluid flow around the valve needle 8 and make the fluid material flow faster.

[0045] Specifically, combined with Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the diversion structure 19 includes guide grooves 20 or channels arranged on both sides of the slope 16 and gradually inclined upward from the outer end to the inner end, and the inclination direction is consistent with the slope 16.

[0046] The guide grooves 20 or channels on both sides of the slope 16 can quickly divert part of the fluid to the two sides of the valve needle 8 relative to the feed channel 5. This part of the fluid directly enters the feed channel 5 without passing through the large curved inner wall 18 of the connecting channel 6, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle 8 but bypasses the valve needle 8, reducing the impact force on the valve needle 8, which can enhance the fluid flow around the valve needle 8 and make the fluid material flow faster.

[0047] Specifically, combined with Figure 3 As shown, an arc-shaped reversing section 21 is provided at the inner end of the guide groove 20 , and an extension line of the inner end of the arc-shaped reversing section 21 intersects with the central axis of the discharge channel 7 in the discharge direction of the discharge channel 7 .

[0048] The arc-shaped reversing section 21 disposed at the inner end of the guide groove 20 plays a guiding role, and is used to quickly and directly guide part of the fluid material to the discharge channel 7, thereby reducing the risk of generating residues.

[0049] Specifically, combined with Figure 3 and Figure 5 As shown, the inner end of the slope 16 is located at the inner end of the feed channel 5 or close to the inner end of the feed channel 5 ; the outer end of the slope 16 is close to the inner wall of the feed channel 5 .

[0050] The inner end of the slope 16 is located at or close to the inner end of the feed channel 5, and the fluid material can flow quickly along the slope 16. The outer end of the slope 16 is close to the inner wall of the feed channel 5, so that part of the fluid material can quickly transition from the slope 16 to the feed channel 5 during the flow process, thereby ensuring the flow speed of the fluid material.

[0051] Specifically, combined with Figure 3-Figure 5 As shown, an arc-shaped outer chamfer 22 is provided between the inner end of the slope 16 and the discharge channel 7 , and a flat section 23 parallel to the central axis of the feed channel 5 is provided between the arc-shaped outer chamfer 22 and the slope 16 ; an inclined portion 24 is provided between the slope 16 and the guide groove 20 .

[0052] The arc-shaped outer chamfer 22 between the inner end of the slope 16 and the discharge channel 7 plays a guiding role, and the flat section 23 between the arc-shaped outer chamfer 22 and the slope 16 plays a diversion role and slows down the flow speed of the fluid material flowing toward the arc-shaped outer chamfer 22, so that it flows along the guide of the arc-shaped outer chamfer 22 to the feed channel 5, and the inclined portion 24 plays a guiding role.

[0053] like Figure 1-Figure 4 As shown, a method for feeding molten material into an injection molding device includes components of the molten material injection molding device, wherein valve needles are inserted into the valve needle mounting hole 9, the connecting channel 6 and the discharge channel 7. After the fluid material enters the feed channel 5 through the feed port 2, at least a portion of the fluid material is reversed by a fluid reversing mechanism 10 before reaching the connecting channel 6, so that the fluid material flows in the connecting channel 6 to the end opposite to the discharge end of the discharge channel 7, so that a portion of the fluid material continuously flows to the back of the valve needle 8 and then enters the discharge channel 7.

[0054] Before the fluid material reaches the connecting channel 6, at least a part of the fluid material is reversed through the fluid reversing mechanism 10 and flows to the opposite end of the discharge channel 7, so that a part of the fluid material continuously flows to the back of the valve needle 8 and then enters the discharge channel 7, which can apply pressure to the residues accumulated in the connecting channel 6 to reduce the residues remaining in the connecting channel 6, and reduce the residence time of the fluid material in the connecting channel 6, thereby increasing the flow rate of the fluid material to prevent blockage, and ensuring that the fluid material flowing out of the discharge port 3 is uniform and stable, greatly improving the injection molding efficiency, and can also enhance the fluid flow around the valve needle 8 to prevent the valve needle 8 from moving slowly due to fluid blockage.

[0055] Specifically, combined with Figure 3-Figure 5 As shown, the fluid reversing mechanism 10 realizes the flow reversal of the fluid material by changing the axial slope of a portion of the inner wall of the feed channel 5 .

[0056] After the fluid material enters the feed channel 5, the fluid reversing mechanism 10 changes a portion of the axial inclination of the inner wall of the feed channel 5, causing the fluid material to turn and allowing at least a portion of the fluid material to flow to the opposite end of the discharge channel 7, thereby reducing the residue in the connecting channel 6, reducing the residence time of the fluid material in the connecting channel 6 and enhancing the fluid flow around the valve needle 8.

[0057] Specifically, combined with Figure 3 As shown, flow diversion channels are respectively generated on both sides of the changed inclination, so that the fluid material is diverted to both sides of the valve needle 8 relative to the feed channel 5.

[0058] The diversion channels on both sides of the slope 16 can quickly divert part of the fluid to the two sides of the valve needle 8 relative to the feed channel 5. This part of the fluid directly enters the feed channel 5 without passing through the large curved inner wall 18 of the connecting channel 6, ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle 8 but bypasses the valve needle 8, reducing the impact force on the valve needle 8, which can enhance the fluid flow around the valve needle 8 and make the fluid material flow faster.

[0059] The working principle of the present invention is as follows: the valve needle mounting hole 9 and the discharge channel 7 are coaxially arranged, the molten material injection molding device includes a manifold 11, and the manifold 11 is internally provided with a plurality of supply channels 12 distributed along the X axis and an injection channel 13 distributed along the Y axis, the injection channel 13 and the supply channel 12 are connected by a connecting pipe 14, the bottom end of the injection channel 13 is connected to an injection nozzle 15, the body 1 is installed in the connecting pipe 14 to occupy the connecting pipe 14, and the feed channel 5 and the discharge channel 7 of the body 1 are respectively connected to the connecting pipe 14. The supply channel 12 and the injection channel 13 are arranged to coincide with each other in a corresponding coaxial manner. Therefore, after the molten material from the supply channel 12 enters the feed port 2 of the body 1, it passes through the feed channel 5, the connecting channel 6 and the discharge channel 7 and flows out from the discharge port 3 of the body 1 to the injection channel 13. The valve needle 8 is installed in the valve needle installation hole 9. A valve needle sleeve is provided on the top of the valve needle 8. A valve needle sleeve installation hole 25 for installing the valve needle sleeve is provided on the top of the body 1. The valve needle 8 can control the closing of the injection nozzle 15 to adjust the injection flow rate of the molten material.

[0060] The fluid reversing mechanism 10 in the feed channel 5 of the body 1 can make at least a part of the fluid material entering from the feed port 2 flow to the end opposite to the discharge end of the discharge channel 7 in the connecting channel 6 before reaching the connecting channel 6, so that a part of the fluid material can continuously flow to the back of the valve needle 8 and then enter the knife discharge channel 7, and can apply pressure to the residue accumulated in the connecting channel 6 to reduce the residue remaining in the connecting channel 6, and can reduce the retention time of the fluid material in the connecting channel 6, can increase the flow speed of the fluid material and prevent blockage, can ensure that the fluid material flowing out of the discharge port 3 is uniform and stable, greatly improves the injection molding efficiency, and can also enhance the fluid flow around the valve needle 8 to prevent the valve needle 8 from moving slowly due to fluid blockage;

[0061] The valve needle mounting hole 9 is provided above the curved portion 17 of the connecting passage 6; more specifically, in this embodiment, the extension line of the slope 16 is located on the inner wall 18 of the large curve of the curved portion 17;

[0062] After the fluid material enters the feed channel 5, the cross-sectional area of ​​the feed channel 5 gradually decreases from the outer end to the inner end due to the setting of the slope 16, so that the fluid material is turned and at least a part of the fluid material can flow to the opposite end of the discharge channel 7, so as to reduce the residue in the connecting channel 6, reduce the retention time of the fluid material in the connecting channel 6 and enhance the fluid flow around the valve needle 8;

[0063] The guide grooves 20 or channels on both sides of the slope 16 can quickly divert part of the fluid to the two sides of the valve needle 8 relative to the feed channel 5. The part of the fluid directly enters the feed channel 5 without passing through the large curved inner wall 18 of the connecting channel 6, thereby ensuring the flow speed of part of the fluid material and reducing the risk of generating residues. In addition, the fluid material avoids direct collision with the valve needle 8 but bypasses the valve needle 8, reducing the impact force on the valve needle 8, which can enhance the fluid flow around the valve needle 8 and make the fluid material flow faster.

[0064] The arc-shaped reversing section 21 provided at the inner end of the guide groove 20 plays a guiding role, and is used to quickly and directly guide part of the fluid material to the discharge channel 7, thereby reducing the risk of generating residues;

[0065] The inner end of the slope 16 is located at or close to the inner end of the feed channel 5, and the fluid material can flow quickly along the slope 16. The outer end of the slope 16 is close to the inner wall of the feed channel 5, so that part of the fluid material can quickly transition from the slope 16 to the feed channel 5 during the flow process, thereby ensuring the flow speed of the fluid material.

[0066] The arc-shaped outer chamfer 22 between the inner end of the slope 16 and the discharge channel 7 plays a guiding role, and the flat section 23 between the arc-shaped outer chamfer 22 and the slope 16 plays a diversion role and slows down the flow speed of the fluid material flowing to the arc-shaped outer chamfer 22, so that it flows into the feed channel 5 along the guide of the arc-shaped outer chamfer 22, and the inclined portion 24 plays a guiding role;

[0067] The method of feeding molten material into the injection molding equipment is that a valve needle is inserted into the valve needle mounting hole 9, the connecting channel 6 and the discharge channel 7. After the fluid material enters the feed channel 5 through the feed port 2, at least a part of the fluid material is reversed by the fluid reversing mechanism 10 before reaching the connecting channel 6, so that the fluid material flows in the connecting channel 6 to the end opposite to the discharge end of the discharge channel 7, so that a part of the fluid material continuously flows to the back of the valve needle 8 and then enters the discharge channel 7;

[0068] The fluid reversing mechanism 10 realizes the flow reversal of the fluid material by changing the axial inclination of a part of the inner wall of the feed channel 5 ; and generates diversion channels on both sides of the changed inclination, so that the fluid material is diverted to the two sides of the valve needle 8 relative to the feed channel 5 .

[0069] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0070] Although this article uses the main body 1, feed port 2, discharge port 3, elbow channel 4, feed channel 5, connecting channel 6, discharge channel 7, valve needle 8, valve needle mounting hole 9, fluid reversing mechanism 10, diverter plate 11, supply channel 12, injection channel 13, connecting pipe 14, injection nozzle 15, slope 16, bend 17, large bend inner wall 18, diversion structure 19, guide groove 20, arc-shaped reversing section 21, arc-shaped outer chamfer 22, flat section 23, inclined portion 24, valve needle sleeve mounting hole 25, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A component of a molten material injection molding device, comprising a body (1), a feed port (2) and a discharge port (3) being provided on the body (1), the feed port (2) and the discharge port (3) being connected via an elbow channel (4), the elbow channel (4) comprising a feed channel (5), a connecting channel (6) and a discharge channel (7), the body (1) being provided with a valve needle mounting hole (9) connected to the connecting channel (6) for mounting a valve needle (8) that can be arranged in the discharge channel (7), characterized in that: The feed channel (5) is provided with a fluid reversing mechanism (10) which enables at least a portion of the fluid material entering from the feed port (2) to flow in the connecting channel (6) to the end of the discharge channel (7) opposite to the discharge end before reaching the connecting channel (6), thereby facilitating a portion of the fluid material to continuously flow to the back of the valve needle (8) and then enter the discharge channel (7).

2. The component of the molten material injection molding device according to claim 1, characterized in that The fluid reversing mechanism (10) comprises a slope (16) arranged on the feed channel (5) and capable of gradually reducing the cross-sectional area of ​​the feed channel (5) from the outer end to the inner end, and the extension line of the slope (16) intersects with the central axis of the feed channel (5) and is located on the curved portion (17) of the connecting channel (6).

3. The component of the molten material injection molding equipment according to claim 2, characterized in that The slope (16) is also provided with a diversion structure (19) capable of quickly diverting part of the fluid material to the two sides of the valve needle (8) relative to the feed channel (5).

4. The component of the molten material injection molding device according to claim 3, characterized in that The diversion structure (19) comprises guide grooves (20) or channels arranged on both sides of the slope (16) and gradually inclined upward from the outer end to the inner end, and the inclination direction is consistent with the slope (16).

5. The component of the molten material injection molding device according to claim 4, characterized in that The inner end of the guide groove (20) is provided with an arc-shaped reversing section (21), and the extension line of the inner end of the arc-shaped reversing section (21) intersects with the central axis of the discharge channel (7) in the discharge direction of the discharge channel (7).

6. The component of the molten material injection molding equipment according to claim 2, characterized in that The inner end of the slope (16) is located at the inner end of the feed channel (5) or close to the inner end of the feed channel (5); the outer end of the slope (16) is in close contact with the inner wall of the feed channel (5).

7. The component of the molten material injection molding device according to claim 6, characterized in that An arc-shaped outer chamfer (22) is provided between the inner end of the slope (16) and the discharge channel (7), and a flat section (23) parallel to the central axis of the feed channel (5) is provided between the arc-shaped outer chamfer (22) and the slope (16); an inclined portion (24) is provided between the slope (16) and the guide groove (20).

8. A method for feeding molten material into an injection molding device, characterized in that: A component comprising a molten material injection molding device as described in any one of claims 1 to 7, wherein valve needles are inserted into the valve needle mounting hole (9), the connecting channel (6) and the discharge channel (7), and after the fluid material enters the feed channel (5) through the feed port (2), at least a portion of the fluid material is reversed through a fluid reversing mechanism (10) before reaching the connecting channel (6), so that the fluid material flows in the connecting channel (6) to the end opposite to the discharge end of the discharge channel (7), so that a portion of the fluid material continuously flows to the back of the valve needle (8) and then enters the discharge channel (7).

9. The method of feeding molten material into injection molding equipment according to claim 8, characterized in that: The fluid reversing mechanism (10) realizes the flow reversal of the fluid material by changing the axial inclination of a portion of the inner wall of the feed channel (5).

10. The method of feeding molten material into injection molding equipment according to claim 8, characterized in that: Diversion channels are respectively generated on both sides of the changed inclination, so that the fluid material is diverted to the two sides of the valve needle (8) relative to the feed channel (5).

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