Split valve needle sleeve hot runner injection mold

Abstract

The utility model discloses a kind of split valve needle sleeve hot runner injection mould, it is related to injection mould technical field, including top plate, hot runner plate, needle sleeve main body, butt joint ring, material conveying barrel, valve needle main body, adjusting mechanism for preventing misplacement adjustment of needle sleeve main body, valve needle main body is set on butt joint ring, the limit pressure ring is located in the inside of hot runner plate, the limit pressure ring is slidably connected with hot runner plate.The utility model can realize the quick butt joint and locking of needle sleeve main body and butt joint ring by adjusting mechanism, effectively improve assembly efficiency, can automatically adjust the position of needle sleeve main body during the process of valve needle main body insertion, then through extrusion locking, the synchronous locking of multiple needle sleeve main bodies can be realized, effectively prevent the wear or poor sealing problem caused by misplacement between valve needle main body and needle sleeve main body, so as to effectively ensure the precision of injection molding and the stability of mould use.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically a split-type valve needle sleeve hot runner injection mold. Background Technology

[0002] The split-type valve needle sleeve hot runner injection mold is a precision injection mold based on needle valve hot runner technology. It is designed as an independent, detachable, modular component that is separate from the hot runner body (such as a manifold). The valve needle sleeve can be machined separately (usually using wear-resistant materials or special coatings), and achieves valve needle guidance and leak-proof sealing through precise fit. Some also have built-in cooling channels for precise temperature control, and integrate an independent valve needle drive system. Compared with the traditional one-piece structure, it can significantly reduce maintenance costs and improve processing efficiency and accuracy.

[0003] Existing hot runner injection molds control the flow of melt by reciprocating the valve pins on a split valve pin sleeve, thus ensuring melt sealing and preventing overflow. However, due to machining accuracy and accumulated errors during assembly, radial or axial misalignment can easily occur between the valve pin sleeve and the valve pin. Furthermore, after assembly, it is difficult to easily adjust the position of the valve pin sleeve, leading to sealing failure and overflow caused by misalignment. This not only affects the molding quality at the gate of the plastic part (e.g., flash, missing material), but also causes blockage of the mold runner, increasing the frequency of mold downtime for maintenance and resulting in poor production efficiency. Therefore, a split valve pin sleeve hot runner injection mold is now provided, which can eliminate the drawbacks of the existing device. Utility Model Content

[0004] The purpose of this invention is to provide a split-type valve needle sleeve hot runner injection mold to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A split-type valve needle sleeve hot runner injection mold includes a top plate, a hot runner plate installed at the bottom end of the top plate, and multiple sets of needle sleeve bodies arranged horizontally at equal intervals below the hot runner plate. Each set of needle sleeve bodies consists of two needle sleeve bodies symmetrically arranged below the hot runner plate. A docking ring is rotatably connected to the top end of each needle sleeve body, and the docking ring contacts the lower surface of the hot runner plate. A feed cylinder is provided at the top end of the docking ring, and the feed cylinder is located inside the hot runner plate and extends through the interior of the docking ring. A valve needle body is slidably connected inside the needle sleeve body, and the valve needle body extends through the needle sleeve body, the docking ring, and the feed cylinder to the outside of the top end of the hot runner plate. An adjustment mechanism is provided on the docking ring for adjusting the needle sleeve body and the valve needle body to prevent misalignment. The adjustment mechanism includes: A limiting pressure ring is fixedly connected to the top of the docking ring. The vertical cross-section of the limiting pressure ring is L-shaped. The limiting pressure ring is located inside the hot runner plate and is slidably connected to the hot runner plate.

[0006] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative embodiment, the adjustment mechanism further includes: A docking assembly is installed on the main body of the needle sheath; The docking components include: A docking sleeve is fixedly connected to the outer wall of the needle sheath body. The docking sleeve is slidably sleeved on the outer wall of the docking ring. Multiple fixing blocks are fixedly connected circumferentially at equal intervals on the outer wall of the docking ring. A guide groove is provided at the position where the docking sleeve contacts the fixing blocks to allow the fixing blocks to slide. The inner wall of the guide groove is L-shaped. The limiting ring is provided with a limiting component for elastically limiting the limiting ring; The docking sleeve is provided with a first locking component for limiting and locking the docking sleeve. The hot runner plate is provided with an extrusion assembly for extruding and fixing the limiting pressure ring.

[0007] In one alternative embodiment, the limiting component includes: Multiple fixed guide rods are circumferentially and equidistantly arranged on the outside of the limiting pressure ring. All of the fixed guide rods are fixedly connected to the hot runner plate. An elastic rubber ring is sleeved on the outer wall of the limiting pressure ring. The elastic rubber ring is in contact with the inner wall of the hot runner plate and is sleeved on the outer wall of the multiple fixed guide rods.

[0008] In one alternative: the first locking component is a second knurled bolt disposed at the bottom end of the mating sleeve, the second knurled bolt passing through the mating sleeve to the interior of the mating ring, and the second knurled bolt being threadedly connected to the mating sleeve.

[0009] In one alternative embodiment, the extrusion assembly includes: Multiple connecting pressure plates are horizontally and equidistantly arranged inside the hot runner plate. Each of the multiple connecting pressure plates corresponds to a multiple set of needle sleeve bodies. The multiple connecting pressure plates are slidably connected to the hot runner plate. The connecting pressure plates are located between two needle sleeve bodies. The connecting pressure plates are slidably sleeved on the outer wall of multiple fixed guide rods. Two friction pressure rings are symmetrically fixedly connected to the bottom end of the connecting pressure plates. The friction pressure rings are slidably sleeved on the outer wall of the multiple fixed guide rods. The friction pressure rings are in contact with the upper surface of the limiting pressure ring. The hot runner plate is equipped with a lifting assembly.

[0010] In one alternative embodiment, the lifting assembly includes: A turntable is located on one side of a hot runner plate. A handle is installed on the side of the turntable away from the hot runner plate. A lead screw is fixedly connected to one side of the turntable. The lead screw is located inside the hot runner plate. A synchronous push plate is sleeved on the outer wall of the lead screw. The synchronous push plate is slidably connected to the hot runner plate and threadedly connected to the lead screw. The synchronous push plate is located below multiple connecting pressure plates. Two movable push plates are symmetrically fixedly connected to the bottom end of the connecting pressure plates. Multiple guide sliders are arranged laterally at equal intervals on the end of the movable push plate away from the synchronous push plate. The multiple guide sliders all pass through the movable push plate and are fixedly connected to the synchronous push plate. A guide groove is opened at the contact position between the movable push plate and the guide slider for the guide slider to slide. The turntable is equipped with a second locking component.

[0011] In one alternative: the second locking component is a first knurled bolt disposed on the side of the turntable away from the hot runner plate, the first knurled bolt being located above the handle, the first knurled bolt penetrating the turntable into the interior of the hot runner plate, and the first knurled bolt being threadedly connected to the turntable.

[0012] In one alternative: a mounting base is installed at the bottom of the top plate, the hot runner plate is located inside the mounting base, an air pump is provided above the valve needle body, the output end of the air pump is fixedly connected to the valve needle body, and the air pump is mounted on the top plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through an adjustment mechanism, enables rapid docking and locking of the needle sleeve body and the docking ring, effectively improving assembly efficiency. During the insertion of the valve needle body, the position of the needle sleeve body is automatically adjusted, and then locked by compression, which can simultaneously lock and fix multiple sets of needle sleeve bodies. This effectively prevents wear or poor sealing caused by misalignment between the valve needle body and the needle sleeve body, thereby effectively ensuring the precision of injection molding and the stability of mold use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the hot runner plate of this utility model.

[0016] Figure 3 This is a schematic diagram of the internal structure of the needle sleeve body of this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of the synchronous pusher plate of this utility model.

[0018] Figure 5 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A in the diagram.

[0019] Figure 6 For the present utility model Figure 4 A magnified schematic diagram of the structure at point B in the diagram.

[0020] Figure reference numerals: 1. Top plate; 201. Friction pressure ring; 202. Connecting pressure plate; 203. Guide slider; 204. Moving push plate; 205. Synchronous push plate; 206. Lead screw; 207. Turntable; 208. First knurled bolt; 209. Fixed guide rod; 2010. Elastic rubber ring; 2011. Butt sleeve; 2012. Fixed block; 2013. Second knurled bolt; 2014. Limiting pressure ring; 3. Fixed seat; 4. Butt ring; 5. Hot runner plate; 6. Air pump; 7. Valve needle body; 8. Needle sleeve body; 9. Feed cylinder. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figures 1-6 As shown, a split-type valve needle sleeve hot runner injection mold includes a top plate 1. A hot runner plate 5 is installed at the bottom end of the top plate 1. Multiple sets of needle sleeve bodies 8 are arranged horizontally and equidistantly below the hot runner plate 5. Each set of needle sleeve bodies 8 has two needle sleeve bodies 8, which are symmetrically arranged below the hot runner plate 5. A docking ring 4 is rotatably connected to the top end of the needle sleeve body 8. The docking ring 4 is in contact with the lower surface of the hot runner plate 5. A feed cylinder 9 is provided at the top end of the docking ring 4. The feed cylinder 9 is located inside the hot runner plate 5 and extends through the interior of the docking ring 4. A support ring is integrally formed on the outer wall of the feed cylinder 9 and is located inside the docking ring 4. The support ring and the docking ring 4 are slidably connected. The valve needle body 7 is slidably connected inside the needle sleeve body 8. The valve needle body 7 passes through the needle sleeve body 8, the docking ring 4, the feed cylinder 9 to the outside of the top of the hot runner plate 5. A sealing ring is fixedly connected to the inner wall of the feed cylinder 9. The sealing ring is sleeved on the outer wall of the valve needle body 7. A fixing seat 3 is installed at the bottom of the top plate 1. The hot runner plate 5 is located inside the fixing seat 3. An air pump 6 is set above the valve needle body 7. The output end of the air pump 6 is fixedly connected to the valve needle body 7. The air pump 6 is installed on the top plate 1. An adjustment mechanism for adjusting the needle sleeve body 8 and the valve needle body 7 to prevent misalignment is set on the docking ring 4. The adjustment mechanism includes: a limiting pressure ring 2014 fixedly connected to the top of the docking ring 4. The vertical cross section of the limiting pressure ring 2014 is L-shaped. The limiting pressure ring 2014 is located inside the hot runner plate 5 and is slidably connected to the hot runner plate 5. In this embodiment, during use, the needle sleeve body 8 and the docking ring 4 can be conveniently docked and locked by adjusting the mechanism. Then, the above operation is repeated to install multiple needle sleeve bodies 8 one by one. Then, the hot runner plate 5 is installed inside the fixed base 3, and then the top plate 1 is installed on the top of the hot runner plate 5. At this time, the valve needle body 7 is driven by the air pump 6 and the top plate 1, and is inserted into the inner cavity of the needle sleeve body 8 along the inner wall of the hot runner plate 5, the feed cylinder 9, and the docking ring 4. When the valve needle body 7 contacts the bottom of the inner wall of the needle sleeve body 8, the needle sleeve body 8 is displaced under the pressure of the outer wall of the valve needle body 7. When the position of the needle sleeve body 8 is adjusted, the needle sleeve body 8 can be limited and locked by the adjustment mechanism, thereby effectively preventing the valve needle body 7 and the needle sleeve body 8 from being misaligned during use. In one embodiment, such as Figures 2-5 As shown, the adjustment mechanism also includes a docking assembly disposed on the needle sleeve body 8; The docking assembly includes: a docking sleeve 2011 fixedly connected to the outer wall of the needle sleeve body 8, the docking sleeve 2011 slidably sleeved on the outer wall of the docking ring 4, a plurality of fixing blocks 2012 are fixedly connected circumferentially at equal intervals on the outer wall of the docking ring 4, and a guide groove is provided at the docking position of the docking sleeve 2011 and the fixing block 2012 for the fixing block 2012 to slide, and the inner wall of the guide groove is L-shaped; The limiting ring 2014 is provided with a limiting component for elastically limiting the limiting ring 2014; The docking sleeve 2011 is provided with a first locking component for limiting and locking the docking sleeve 2011; The hot runner plate 5 is provided with an extrusion assembly for extruding and fixing the limiting pressure ring 2014; The first locking component is a second knurled bolt 2013 located at the bottom of the docking sleeve 2011. The second knurled bolt 2013 passes through the docking sleeve 2011 to the inside of the docking ring 4. The second knurled bolt 2013 is threadedly connected to the docking sleeve 2011. Through the cooperation of the docking component and the first locking component, the needle sleeve body 8 and the docking ring 4 can be conveniently docked and locked. In one embodiment, such as Figures 2-6 As shown, the limiting assembly includes: multiple fixed guide rods 209 circumferentially and equidistantly arranged on the outside of the limiting pressure ring 2014, all of which are fixedly connected to the hot runner plate 5; an elastic rubber ring 2010 is sleeved on the outer wall of the limiting pressure ring 2014, the elastic rubber ring 2010 is in contact with the inner wall of the hot runner plate 5, and the elastic rubber ring 2010 is sleeved on the outer wall of the multiple fixed guide rods 209, through the multiple fixed guide rods 209; The extrusion assembly includes: multiple connecting pressure plates 202 arranged laterally and equidistantly inside the hot runner plate 5, the multiple connecting pressure plates 202 corresponding to multiple sets of needle sleeve bodies 8 respectively, the multiple connecting pressure plates 202 being slidably connected to the hot runner plate 5, the connecting pressure plates 202 being located between two needle sleeve bodies 8, the connecting pressure plates 202 being slidably sleeved on the outer wall of multiple fixed guide rods 209, the bottom end of the connecting pressure plates 202 being symmetrically fixedly connected to two friction pressure rings 201, the friction pressure rings 201 being slidably sleeved on the outer wall of multiple fixed guide rods 209, the friction pressure rings 201 being in contact with the upper surface of the limiting pressure ring 2014, the bottom end of the friction pressure rings 201 and the top end of the limiting pressure ring 2014 being formed with anti-slip texture; A lifting assembly is provided on the hot runner plate 5; The lifting assembly includes: a turntable 207 disposed on one side of the hot runner plate 5; a fixed base 3 having an opening on the side of the turntable 207 away from the hot runner plate 5; a handle installed on the side of the turntable 207 away from the hot runner plate 5; a lead screw 206 fixedly connected to one side of the turntable 207; the lead screw 206 being located inside the hot runner plate 5; a synchronous push plate 205 sleeved on the outer wall of the lead screw 206; the synchronous push plate 205 being slidably connected to the hot runner plate 5; and the synchronous push plate 205 being screwed to the lead screw 206. The synchronous push plate 205 is located below multiple connecting pressure plates 202. Two movable push plates 204 are symmetrically fixedly connected to the bottom end of the connecting pressure plates 202. Multiple guide sliders 203 are arranged horizontally and equidistantly at the end of the movable push plate 204 away from the synchronous push plate 205. The multiple guide sliders 203 all pass through the movable push plate 204 and are fixedly connected to the synchronous push plate 205. A guide groove is opened at the contact position between the movable push plate 204 and the guide slider 203 for the guide slider 203 to slide. A second locking component is provided on turntable 207; The second locking component is a first knurled bolt 208 located on the side of the turntable 207 away from the hot runner plate 5. The first knurled bolt 208 is located above the handle and passes through the turntable 207 to the interior of the hot runner plate 5. The first knurled bolt 208 is threadedly connected to the turntable 207. Through the cooperation of the limiting component, the squeezing component, the lifting component and the second locking component, the adjusted limiting pressure ring 2014 can be squeezed and locked, effectively preventing the valve needle body 7 and the needle sleeve body 8 from being misaligned during use.

[0023] The above embodiment discloses a split-type valve needle sleeve hot runner injection mold. In use, the needle sleeve body 8 is pushed to make the docking sleeve 2011 slide onto the outer wall of the docking ring 4. At this time, the docking sleeve 2011 is sleeved onto the outer wall of the fixing block 2012 through the guide groove. When the docking sleeve 2011 contacts the lower surface of the docking ring 4, the needle sleeve body 8 is rotated to make the docking sleeve 2011 rotate along the outer wall of the docking ring 4. At the same time, the docking sleeve 2011 slides along the outer wall of the fixing block 2012 through the guide groove until the fixing block 2012 contacts the inner wall of one end of the guide groove. Then, the second knurled bolt 2013 is rotated and inserted into the interior of the docking ring 4. This enables convenient docking between the needle sleeve body 8 and the docking ring 4 and limits and locks the docking sleeve 2011. Then, the above operation is repeated to install multiple needle sleeve bodies 8 one by one. Then, the hot runner plate 5 is installed inside the fixed base 3, and then the top plate 1 is installed on the top of the hot runner plate 5. At this time, the valve needle body 7 is inserted into the inner cavity of the needle sleeve body 8 by the air pump 6 driven by the top plate 1, along the inner wall of the hot runner plate 5, the feed cylinder 9, and the docking ring 4. When the valve needle body 7 contacts the bottom of the inner wall of the needle sleeve body 8, the needle sleeve body 8 is squeezed by the outer wall of the valve needle body 7, and the docking sleeve 2011 drives the docking ring 4 to slide along the outer wall of the support ring. At this time, the limiting pressure ring 2014 is driven by the docking ring 4, and the elastic rubber ring 2010 is deformed by moving and squeezing. When the position of the needle sleeve body 8 is adjusted, the handle drives the turntable 207 to rotate, and the screw 206 is driven by the turntable 207. The synchronous push plate 205 is pushed along the inner wall of the hot runner plate 5 and moved towards the turntable 207 by the thread. At this time, the guide slider 203 is squeezed against the inner wall of the guide groove by the synchronous push plate 205. At the same time, the moving push plate 204 is squeezed against the outer wall of the guide slider 203 by the guide groove and the connecting pressure plate 202 drives the friction pressure ring 201 along the outer wall of the fixed guide rod 209 to squeeze the upper surface of the limiting pressure ring 2014. At this time, the anti-slip texture can effectively increase the friction between the friction pressure ring 201 and the limiting pressure ring 2014, so as to squeeze and lock the limiting pressure ring 2014. Then, the first knurled bolt 208 is rotated and inserted into the interior of the hot runner plate 5, so as to limit and lock the turntable 207, thereby effectively preventing the valve needle body 7 and the needle sleeve body 8 from being misaligned during use.

[0024] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A split-type valve needle sleeve hot runner injection mold, comprising a top plate (1), wherein a hot runner plate (5) is installed at the bottom end of the top plate (1), and multiple sets of needle sleeve bodies (8) are arranged horizontally and equidistantly below the hot runner plate (5), wherein each set of needle sleeve bodies (8) consists of two needle sleeve bodies (8), and the two needle sleeve bodies (8) are symmetrically arranged below the hot runner plate (5), wherein a docking ring (4) is rotatably connected to the top end of each needle sleeve body (8), the docking ring (4) is in contact with the lower surface of the hot runner plate (5), a feed cylinder (9) is provided at the top end of the docking ring (4), the feed cylinder (9) is located inside the hot runner plate (5), the feed cylinder (9) extends through the interior of the docking ring (4), and a valve needle body (7) is slidably connected inside the needle sleeve body (8), the valve needle body (7) extends through the needle sleeve body (8), the docking ring (4), and the feed cylinder (9) to the outside of the top end of the hot runner plate (5), characterized in that, The docking ring (4) is provided with an adjustment mechanism for adjusting the needle sleeve body (8) and valve needle body (7) to prevent misalignment; The adjustment mechanism includes a limiting pressure ring (2014) fixedly connected to the top of the docking ring (4). The vertical cross section of the limiting pressure ring (2014) is L-shaped. The limiting pressure ring (2014) is located inside the hot runner plate (5). The limiting pressure ring (2014) is slidably connected to the hot runner plate (5).

2. The split-type valve needle sleeve hot runner injection mold according to claim 1, characterized in that, The adjustment mechanism also includes a docking assembly disposed on the needle sleeve body (8); The docking assembly includes: a docking sleeve (2011) fixedly connected to the outer wall of the needle sleeve body (8), the docking sleeve (2011) being slidably sleeved on the outer wall of the docking ring (4), the outer wall of the docking ring (4) being circumferentially fixedly connected with a plurality of fixing blocks (2012), and a guide groove for the fixing blocks (2012) to slide at the docking position of the docking sleeve (2011) and the fixing blocks (2012), the inner wall of the guide groove being L-shaped; The limiting ring (2014) is provided with a limiting component for elastically limiting the limiting ring (2014); The docking sleeve (2011) is provided with a first locking component for limiting and locking the docking sleeve (2011); The hot runner plate (5) is provided with an extrusion assembly for extruding and fixing the limiting pressure ring (2014).

3. A split-type valve needle sleeve hot runner injection mold according to claim 2, characterized in that, The limiting component includes: a plurality of fixed guide rods (209) circumferentially and equidistantly arranged on the outside of the limiting pressure ring (2014), the plurality of fixed guide rods (209) being fixedly connected to the hot runner plate (5), the outer wall of the limiting pressure ring (2014) being fitted with an elastic rubber ring (2010), the elastic rubber ring (2010) being in contact with the inner wall of the hot runner plate (5), and the elastic rubber ring (2010) being fitted on the outer wall of the plurality of fixed guide rods (209).

4. A split-type valve needle sleeve hot runner injection mold according to claim 2, characterized in that, The first locking component is a second knurled bolt (2013) located at the bottom of the docking sleeve (2011). The second knurled bolt (2013) passes through the docking sleeve (2011) to the interior of the docking ring (4). The second knurled bolt (2013) is threadedly connected to the docking sleeve (2011).

5. A split-type valve needle sleeve hot runner injection mold according to claim 2, characterized in that, The extrusion assembly includes: multiple connecting pressure plates (202) arranged laterally and equidistantly inside the hot runner plate (5), the multiple connecting pressure plates (202) respectively corresponding to multiple sets of needle sleeve bodies (8), the multiple connecting pressure plates (202) are slidably connected to the hot runner plate (5), the connecting pressure plates (202) are located between two needle sleeve bodies (8), the connecting pressure plates (202) are slidably sleeved on the outer wall of multiple fixed guide rods (209), the bottom end of the connecting pressure plates (202) is symmetrically fixedly connected to two friction pressure rings (201), the friction pressure rings (201) are slidably sleeved on the outer wall of multiple fixed guide rods (209), and the friction pressure rings (201) are in contact with the upper surface of the limiting pressure ring (2014); The hot runner plate (5) is equipped with a lifting assembly.

6. A split-type valve needle sleeve hot runner injection mold according to claim 5, characterized in that, The lifting assembly includes: a turntable (207) disposed on one side of the hot runner plate (5), a handle installed on the side of the turntable (207) away from the hot runner plate (5), a lead screw (206) fixedly connected to one side of the turntable (207), the lead screw (206) being located inside the hot runner plate (5), a synchronous push plate (205) sleeved on the outer wall of the lead screw (206), the synchronous push plate (205) being slidably connected to the hot runner plate (5), the synchronous push plate (205) being threadedly connected to the lead screw (206), the synchronous push plate (205) being threadedly connected to the lead screw (206), the synchronous push plate (205) being threadedly connected to the lead screw (206), the synchronous push plate (205) being threadedly connected to the hot runner plate (5 ... 205) Located below multiple connecting pressure plates (202), the bottom end of the connecting pressure plate (202) is symmetrically fixedly connected to two movable push plates (204). Multiple guide sliders (203) are arranged horizontally at equal intervals on the end of the movable push plate (204) away from the synchronous push plate (205). The multiple guide sliders (203) all pass through the movable push plate (204) and are fixedly connected to the synchronous push plate (205). A guide groove is opened at the contact position between the movable push plate (204) and the guide slider (203) for the guide slider (203) to slide. The turntable (207) is provided with a second locking component.

7. A split-type valve needle sleeve hot runner injection mold according to claim 6, characterized in that, The second locking component is a first knurled bolt (208) disposed on the side of the turntable (207) away from the hot runner plate (5). The first knurled bolt (208) is located above the handle and passes through the turntable (207) to the interior of the hot runner plate (5). The first knurled bolt (208) is threadedly connected to the turntable (207).

8. A split-type valve needle sleeve hot runner injection mold according to claim 1, characterized in that, A fixed seat (3) is installed at the bottom of the top plate (1), the hot runner plate (5) is located inside the fixed seat (3), and an air pump (6) is provided above the valve needle body (7). The output end of the air pump (6) is fixedly connected to the valve needle body (7), and the air pump (6) is installed on the top plate (1).

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