A two-channel hot runner molding die

Abstract

The present application relates to injection mold technical field, specifically to a kind of double-channel hot runner forming mold, including the mold assembly of being able to mutually clamping, mold assembly and being located between mold assembly and demolding mechanism to product is demolded, mold assembly and mold assembly are slidingly fitted, mold plate assembly includes hot runner plate and the upper fixed plate of abutment in hot runner plate upper side and the upper forming mold plate of abututment in hot runner plate lower side, hot runner plate is equipped with valve needle hot runner, valve needle hot runner is equipped with hot runner shunt bifurcated pipe, mold assembly includes mold plate and the push plate of being equipped with in mold plate upper and the support block of being equipped with in mold plate below, the bottom surface of support block is equipped with bottom plate.The mold of the present application has no ejection, no runner, no gate material, occupies small space, can use smaller machine platform to make the cavity number of mold double, and realize hot runner valve needle and runner separation, facilitate to realize fast heat exchange, and pouring is more uniform.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and specifically to a dual-channel hot runner molding mold. Background Technology

[0002] The injection mold commonly used in the injection molding industry is the hot runner injection mold. Compared with ordinary molds, plastic products molded by the hot runner system are of higher quality, and the hot runner system has advantages such as saving raw materials, improving production efficiency, and high degree of automation.

[0003] In current needle valve hot runner molds, the valve needle is directly inside the hot runner during injection molding. When the molten material is poured, it flows in a ring. During the process, the molten material wraps around the valve needle, resulting in uneven material flow inside the runner. In some areas, the hot material remains in the hot nozzle for a longer time. This is especially true for heat-sensitive plastics like PVC, where prolonged residence in the hot nozzle can lead to carbonization and ultimately product defects. In addition, the molten material wrapping around the valve needle makes it difficult to change colors during production.

[0004] Furthermore, after injection molding, the sprue material needs to be cut by a cutting mechanism, which is cumbersome and wastes raw materials. In addition, the demolding structure is complex and cumbersome to operate, making it difficult to demold the mold cavity and affecting the overall processing efficiency. Summary of the Invention

[0005] This invention provides a dual-channel hot runner molding die to solve the technical problems of uneven and slow glue flow in traditional valve needle runners, which leads to product defects and cumbersome demolding of cast products, thus affecting processing efficiency.

[0006] To solve the above problems, the present invention provides a dual-channel hot runner molding die, which adopts the following technical solution:

[0007] It includes a fixed mold assembly and a moving mold assembly that can be closed together, and a demolding mechanism disposed between the fixed mold assembly and the moving mold assembly for demolding the finished product, wherein the fixed mold assembly and the moving mold assembly are in sliding fit.

[0008] The fixed mold assembly includes a hot runner plate, an upper fixed plate abutting against the upper side of the hot runner plate, and an upper forming template abutting against the lower side of the hot runner plate. The upper surface of the upper fixed plate is provided with a heat insulation plate.

[0009] The hot runner plate contains a first manifold, and the first manifold contains a second manifold. A hot runner body is located at the bottom of the second manifold. A heating coil is fitted over the top of the hot runner body, and a copper-sleeved heating coil is also fitted over the hot runner body. A valve needle is located within the hot runner body, and a valve sleeve allowing the valve needle to pass through is also located within the hot runner body. A heat insulation pad is located on the first manifold, and the tip of the valve needle passes through the heat insulation pad and connects to a cylinder. The cylinder is fixed to an upper fixed plate. An integrated hot runner manifold is located within the second manifold. It includes a main hot runner connected to the dispensing tube and a branch hot runner connected to the main hot runner. The branch hot runner extends into the hot runner body and there are two branch hot runners spaced apart on both sides of the valve needle. The bottom end of the hot runner body is provided with a dispensing nozzle core. The dispensing nozzle core is covered with a nozzle head. A nozzle core heating ring is provided between the dispensing nozzle core and the nozzle head. A heat insulation cap is provided on the dispensing nozzle core. The bottom end of the branch hot runner is provided with a diagonal flow tube. The two diagonal flow tubes are symmetrically arranged and are both connected to the dispensing nozzle core. The valve needle is driven by a cylinder to open and close the bottom port of the dispensing nozzle core.

[0010] By adopting the above technical solution, the valve needle inside the hot runner body is separated from the hot runner, which enables rapid color change. For heat-sensitive plastics such as rigid PVC, it avoids the uneven material flow in the runner caused by the runner and valve needle being together. This prevents some material from remaining in the hot nozzle for too long, which can lead to PVC decomposition and carbonization, ultimately resulting in product defects.

[0011] The moving mold assembly includes a moving mold plate, a push plate disposed above the moving mold plate, and a support block disposed below the moving mold plate. The bottom surface of the support block is provided with a base plate.

[0012] The lower surface of the upper molding template forms an upper mold cavity. The moving template is provided with a molding module that slides through the push plate. The upper surface of the molding module forms a lower mold cavity. An injection cavity is formed between the upper mold cavity and the lower mold cavity. The dispensing nozzle core is connected to the injection cavity. The injection cavity is provided with a fixed core and a sliding core that corresponds to and cooperates with the fixed core. The demolding mechanism is fixed on the push plate and is located at the end of the sliding core away from the fixed core and is used for demolding the finished product.

[0013] Using the above technical solution, there is no sprue after the finished product is cast and demolded, resulting in good processing effect, high degree of integration, small space occupation, and the number of cavities of the mold can be doubled with a relatively small machine, resulting in high processing efficiency.

[0014] Furthermore, the inner wall of the hot runner manifold is smooth, the top end of the hot runner is an arc-shaped bend, and the bottom end of the hot runner is connected to the diagonal flow tube by an arc-shaped connector.

[0015] Furthermore, the glue injection port extends vertically through the upper fixed plate and its bottom end connects to the first diversion plate. The first diversion plate is provided with a branch pipe connecting the hot runner diversion manifold and the glue injection port.

[0016] Using the above technical solution, the hot runner manifold is formed by metal 3D printing, with a smooth inner wall and an arc transition at the connection, which improves the uniformity of plastic flow and increases the flow speed, while reducing the pressure loss and stagnation of plastic fluid.

[0017] Furthermore, a support block for fixing and supporting the fixed core is vertically slidably passed through the molding module. The fixed core is fixed to the side of the fixed core. The sliding core is coaxially arranged with the fixed core and is driven to move along its axial direction by the demolding mechanism. The free end of the fixed core is provided with a limiting groove. The end of the sliding core opposite to the fixed core is provided with a positioning protrusion that cooperates with the limiting groove. The outer wall of the free end of the sliding core is provided with a limiting slot in the circumferential direction.

[0018] Furthermore, the demolding mechanism includes a U-shaped frame fixed to the push plate, a movable slider is provided between the two symmetrical side plates of the U-shaped frame, a hydraulic cylinder for driving the movable slider is fixed on the bottom plate between the two side plates of the U-shaped frame, the end of the sliding core away from the fixed core is fixed to the movable slider, a guide rod is provided on the side of the movable slider away from the sliding core, and a through hole corresponding to the guide rod is provided on the bottom plate of the U-shaped frame;

[0019] The push plate is provided with a demolding groove that allows the sliding core to pass through but does not allow the finished product to pass through.

[0020] By adopting the above technical solution, rapid demolding is achieved through the movement of a single-sided core. The entire demolding process is simple and quick, which can effectively improve production efficiency and product yield.

[0021] Furthermore, the support blocks are two spaced apart, and a jacking assembly is provided between the two support blocks between the moving template and the base plate. The jacking assembly drives the support block and the push plate to move up and down.

[0022] Furthermore, the push assembly includes a push pin base plate and a push pin panel fixedly disposed on the upper surface of the push pin base plate. A guide post is provided between the moving template and the base plate, penetrating the push pin base plate and the push pin panel. A push pin is provided on the upper surface of the push pin base plate. The push pin penetrates the push pin panel and the moving template in one pass and its top end is fixedly connected to the push plate. The bottom end of the support block is fixed on the push pin panel.

[0023] Furthermore, a spring is fitted onto the ejector pin between the moving template and the push plate. The upper surface of the moving template is provided with a limiting hole for the limiting spring. An elastic rubber column protruding from the upper surface of the moving template is fixed on the moving template. The lower surface of the push plate is provided with a positioning hole corresponding to the elastic rubber column.

[0024] Using the above technical solution, the finished product is stably pushed out by the pusher component and demolded in conjunction with the demolding mechanism.

[0025] Furthermore, the moving template is provided with guide posts that penetrate the push plate, and the bottom surface of the upper forming template is formed with guide sleeves corresponding to the guide posts.

[0026] Furthermore, both the upper and lower mold cavities are equipped with cooling structures.

[0027] The cooling structure is a liquid cooling pipe, with both the inlet and outlet ends of the liquid cooling pipe extending outwards.

[0028] By adopting the above technical solution, liquid cooling can be used to achieve rapid shaping of finished products, thereby improving product yield and production efficiency.

[0029] The advantages of the dual-channel hot runner molding die provided by the present invention are: the die of the present invention has no ejector, no runner, no sprue, occupies little space, and can double the number of cavities of the die with a relatively small machine.

[0030] In particular, the valve needle is separated from the hot runner body, which enables rapid color change. For heat-sensitive plastics such as rigid PVC, this design avoids uneven material flow in the runner due to the runner and valve needle being together. This prevents some material from remaining in the hot nozzle for too long, which can lead to PVC decomposition and carbonization, ultimately resulting in product defects.

[0031] The demolding mechanism achieves rapid demolding through the movement of a single-sided core. The entire demolding process is simple and quick, which can effectively improve production efficiency and product yield. Attached Figure Description

[0032] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0033] Figure 1 This is a schematic diagram of the dual-channel hot runner forming mold of the present invention in the mold-closed state;

[0034] Figure 2 This is a schematic diagram of the dual-channel hot runner forming mold of the present invention in the mold opening state;

[0035] Figure 3 This is one of the structural schematic diagrams of the moving mold assembly in this invention;

[0036] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0037] Figure 5 This is the second schematic diagram of the structure of the moving mold assembly in this invention;

[0038] Figure 6 This is one of the cross-sectional views of the dual-channel hot runner forming mold of the present invention in the mold-closed state;

[0039] Figure 7 This is a partial structural cross-sectional view of the mold assembly in this invention;

[0040] Figure 8 for Figure 7 A magnified view of a portion of region B in the middle;

[0041] Figure 9 for Figure 6 A magnified view of a portion of region C in the middle;

[0042] Figure 10 This is a bottom view of the portion of the hot runner manifold located inside the second manifold plate in this invention;

[0043] Figure 11 This is a side view of the portion of the hot runner manifold located inside the second manifold plate in this invention;

[0044] Figure 12 This is a front view of the portion of the hot runner manifold located inside the second manifold plate in this invention;

[0045] Figure 13 This is a perspective view of the portion of the hot runner manifold located inside the second manifold plate in this invention;

[0046] Figure 14 This is a schematic diagram of the structure in this invention where the support block is fixed to the ejector plate;

[0047] Figure 15 This is the second cross-sectional view of the dual-channel hot runner forming mold of the present invention in the mold-closed state.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Fixed mold assembly; 11. Upper fixed plate; 111. Injection nozzle; 112. Heat insulation plate; 12. Hot runner plate; 121. First manifold; 1211. Branch pipe; 122. Second manifold; 123. Hot runner body; 1230. Heating coil; 1231. Valve needle; 1232. Nozzle core; 1233. Heat insulation cap; 1234. Copper sleeve heating coil; 1235. Valve sleeve; 1236. Nozzle core heating coil; 1237. Nozzle; 124. Heat insulation pad; 125. Cylinder; 126. Hot runner manifold; 1261. Main hot runner; 1262. Branch hot runner; 1263. Inclined flow pipe; 1264. Arc-shaped connector; 13. Upper molding plate; 131. Upper mold cavity; 132. Guide sleeve;

[0050] 2. Moving mold assembly; 21. Moving mold plate; 211. Molding module; 2110. Lower mold cavity; 212. Support block; 213. Limiting hole; 214. Elastic rubber pillar; 215. Guide pillar; 22. Push plate; 221. Demolding groove; 222. Positioning hole; 23. Support block; 24. Base plate;

[0051] 3. Demolding mechanism; 31. U-shaped frame; 32. Moving slider; 33. Hydraulic cylinder; 34. Guide rod;

[0052] 4. Injection cavity; 41. Fixed core; 410. Guide copper sleeve; 411. Limiting groove; 42. Sliding core; 421. Positioning protrusion; 422. Limiting slot;

[0053] 5. Pushing assembly; 51. Ejector base plate; 511. Ejector pin; 512. Limiting spring; 52. Ejector pin panel; 53. Guide post;

[0054] 6. Liquid cooling pipes. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0056] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0057] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0058] Example 1 of the dual-channel hot runner forming mold provided by the present invention:

[0059] like Figures 1 to 15 As shown,

[0060] It includes a fixed mold assembly 1 and a moving mold assembly 2 that can be molded together, and a demolding mechanism 3 located between the fixed mold assembly 1 and the moving mold assembly 2 for demolding the finished product. The fixed mold assembly 1 and the moving mold assembly 2 are in sliding fit.

[0061] The fixed mold assembly 1 includes a hot runner plate 12, an upper fixing plate 11 abutting against the upper side of the hot runner plate 12, and an upper forming template 13 abutting against the lower side of the hot runner plate 12. The upper surface of the upper fixing plate 11 is provided with a heat insulation plate 112.

[0062] The hot runner plate 12 is provided with a first diversion plate 121, and a second diversion plate 122 is provided within the first diversion plate 121. A hot runner body 123 is provided at the bottom end of the second diversion plate 122. A heating coil 1230 is fitted over the top of the hot runner body 123, and a copper-sleeved heating coil 1234 is fitted over the hot runner body 123. A valve needle 1231 is provided inside the hot runner body 123. A heat insulation pad 124 is provided on the first diversion plate 121. The top end of the valve needle 1231 passes through the heat insulation pad 124 and is connected to a cylinder 125. The cylinder 125 is fixed to an upper fixing plate 11. An integrated hot runner manifold 126 is provided within the second diversion plate 122. 126 includes a main hot runner 1261 connected to the glue injection port 111 and a branch hot runner 1262 connected to the main hot runner 1261. The branch hot runner 1262 extends into the hot runner body 123, and there are two branch hot runners 1262 in the hot runner body 123, which are spaced apart on both sides of the valve needle 1231. The bottom end of the hot runner body 123 is provided with a glue dispensing nozzle core 1232. The glue dispensing nozzle core 1232 is covered with a heat insulation cap 1233. The bottom end of the branch hot runner 1262 is provided with a diagonal flow tube 1263. The two diagonal flow tubes 1263 are symmetrically arranged and are both connected to the glue dispensing nozzle core 1232. The valve needle 1231 is driven by the cylinder 125 to realize the opening and closing of the bottom port of the glue dispensing nozzle core 1232.

[0063] The inner wall of the hot runner manifold 126 is smooth, the top end of the hot runner 1262 is an arc-shaped bend, and the bottom end of the hot runner 1262 is connected to the diagonal flow tube 1263 by an arc-shaped connector 1264.

[0064] It should be noted that the hot runner manifold 126 is made of metal 3D printing, with a smooth inner wall and an arc transition at the connection, which improves the uniformity of plastic flow and increases the flow speed, while reducing the pressure loss and stagnation of plastic fluid.

[0065] In this embodiment, the hot runner manifold 126 is located within the second manifold 122, as shown in the following diagram. Figures 10-13 As shown, the main hot runner 1261 is connected to four branch hot runners 1262, and satisfies the branch casting within the bodies 123 of two hot runners.

[0066] The glue injection port 111 is vertically inserted through the upper fixed plate 11 and its bottom end is connected to the first diversion plate 121. The first diversion plate 121 is provided with a branch pipe 1211 that connects the hot runner diversion manifold 126 and the glue injection port 111.

[0067] In actual use, the valve needle 1231 is driven by the cylinder 125 to open the dispensing nozzle core 1232. The casting material enters through the injection port 111 and enters the hot runner manifold 126 through the branch pipe 1211. The casting material flows down uniformly and quickly through the hot runner manifold 126 and flows out through the dispensing nozzle core 1232 into the injection cavity 4 for finished product casting.

[0068] By adopting the above technical solution, the hot runner formed by the valve needle 1231 inside the hot runner body 123 and the hot runner diversion manifold 126 is separated, which facilitates rapid color change and avoids uneven material flow in the flow channel caused by the flow channel and valve needle 1231 being together. This prevents local material from remaining in the hot nozzle for too long, which would lead to PVC decomposition and carbonization and ultimately product defects.

[0069] The moving mold assembly 2 includes a moving mold plate 21, a push plate 22 disposed above the moving mold plate 21, and a support block 23 disposed below the moving mold plate 21. The bottom surface of the support block 23 is provided with a bottom plate 24.

[0070] The lower surface of the upper molding template 13 forms an upper mold cavity 131. The moving template 21 is provided with a molding module 211 that slides through the push plate 22. The upper surface of the molding module 211 forms a lower mold cavity 2110. An injection cavity 4 is formed between the upper mold cavity 131 and the lower mold cavity 2110. The dispensing nozzle core 1232 is connected to the injection cavity 4. The injection cavity 4 is provided with a fixed core 41 and a sliding core 42 that corresponds to and cooperates with the fixed core 41. The demolding mechanism 3 is fixed on the push plate 22 and is located at the end of the sliding core 42 away from the fixed core 41 and is used for demolding the finished product.

[0071] The molding module 211 has a vertically sliding support block 212 for fixing and supporting the fixed core 41. The fixed core 41 is fixed to the side of the fixed core 41. The sliding core 42 is coaxially arranged with the fixed core 41 and is driven to move along its axial direction by the demolding mechanism 3. The free end of the fixed core 41 is provided with a limiting groove 411. The end of the sliding core 42 opposite to the fixed core 41 is provided with a positioning protrusion 421 that cooperates with the limiting groove 411. The outer wall of the free end of the sliding core 42 is provided with a limiting slot 422 in the circumferential direction.

[0072] The bottom surface of the forming module 211 is embedded with a guide copper sleeve 410 that allows the support block 212 to pass through.

[0073] In this embodiment, the PVC pipe is cast by the injection cavity 4, the fixed core 41, and the sliding core 42.

[0074] Both the fixed core 41 and the sliding core 42 include molding sections smaller than the diameter of the core body. Specifically, during casting, the ends of the fixed core 41 and the sliding core 42 are joined together, and the glue dispensing nozzle core 1232 starts casting at the end of the finished product at the upper end of the sliding core 42.

[0075] During demolding, after the fixed mold assembly 1 and the moving mold assembly 2 separate, the support block 212 and the push plate 22 move upward simultaneously, driving the fixed core 41, the sliding core 42 and the finished product to move upward, so that the finished product is separated from the lower mold cavity 2110, which facilitates demolding through the demolding mechanism 3.

[0076] It should be noted that the limiting groove 411 between the sliding core 42 and the fixed core 41, in conjunction with the positioning protrusion 421, facilitates positioning and docking during casting.

[0077] In addition, the end of the sliding core 42 is provided with a limiting groove 422, which ensures that when the demolding mechanism 3 drives the sliding core 42 to slide outward, the finished product is separated from the fixed core 41 and stays on the sliding core 42, so as to facilitate further demolding through the demolding mechanism 3, and also ensures that the finished product is removed from the sliding core 42 through the action of the demolding groove 221.

[0078] The demolding mechanism 3 includes a U-shaped frame 31 fixed on the push plate 22. A movable slider 32 is provided between the two symmetrical side plates of the U-shaped frame 31. A hydraulic cylinder 33 for driving the movable slider 32 is fixed on the bottom plate between the two side plates of the U-shaped frame 31. The end of the sliding core 42 away from the fixed core 41 is fixed to the movable slider 32. A guide rod 34 is provided on the side of the movable slider 32 away from the sliding core 42. A through hole corresponding to the guide rod 34 is provided on the bottom plate of the U-shaped frame 31.

[0079] The bottom end of the movable slider 32 is provided with a protrusion, and the inner sides of the two side plates of the U-shaped frame 31 are provided with bosses. The protrusion is placed on the bosses so that the movable slider 32 can slide stably between the two side plates.

[0080] The push plate 22 is provided with a demolding groove 221 that allows the sliding core 42 to pass through but does not allow the finished product to pass through.

[0081] During the demolding process, the hydraulic cylinder 33 in the demolding mechanism 3 drives the movable slider 32 to move, which in turn drives the sliding core 42 to move away from the fixed core 41. In the process of moving, the finished product is first separated from the fixed core 41, and then the sliding core 42 moves further. Through the action of the demolding groove 221, the finished product is removed from the sliding core 42, thus completing the demolding process.

[0082] The demolding mechanism 3 achieves rapid demolding through the movement of the core on one side. The entire demolding process is simple and quick, which can effectively improve production efficiency and product yield.

[0083] Among them, there are two support blocks 23 spaced apart, and a push assembly 5 is provided between the moving template 21 and the base plate 24, which is located between the two support blocks 23. The push assembly 5 drives the support block 212 and the push plate 22 to move up and down.

[0084] The push assembly 5 includes a push pin base plate 51 and a push pin panel 52 fixed on the upper surface of the push pin base plate 51. A guide post 53 is provided between the moving template 21 and the base plate 24, penetrating the push pin base plate 51 and the push pin panel 52.

[0085] The upper surface of the ejector base plate 51 is provided with ejector pins 511. The ejector pins 511 pass through the ejector panel 52 and the moving template 21 in sequence, and the top end is fixedly connected to the push plate 22. The support block 212 movably passes through the moving template 21 and the bottom end is fixed on the ejector panel 52.

[0086] Among them, a spring 512 is placed on the ejector pin 511 between the moving template 21 and the push plate 22, and the upper surface of the moving template 21 is provided with a limiting hole 213 for the limiting spring 512.

[0087] The movable template 21 is fixed with an elastic rubber column 214 protruding from the upper surface of the movable template 21, and the lower surface of the push plate 22 is provided with a positioning hole 222 corresponding to the elastic rubber column 214.

[0088] The moving template 21 is provided with a guide post 215 that penetrates the push plate 22, and the bottom surface of the upper forming template 13 is formed with a guide sleeve 132 corresponding to the guide post 215.

[0089] During the demolding process, the pusher assembly 5 stably pushes out the support block 212 and the push plate 22 simultaneously, which drives the fixed core 41, the sliding core 42 and the finished product to move upward, so that the finished product is separated from the lower mold cavity 2110, making it easier to achieve demolding through the demolding mechanism 3.

[0090] It should be noted that the pushing operation of the pushing assembly 5 can be achieved by the hydraulic cylinder located below the base plate 24 passing through the base plate 24 to push the ejector base plate 51, thereby enabling the ejector pin 511 to drive the push plate 22 to move, and simultaneously drive the support block 212 to move.

[0091] The support block 212 is equipped with a liquid cooling pipe 6, and the inlet and outlet ends of the liquid cooling pipe 6 extend out from the side of the ejector plate 52.

[0092] Among them, the elastic rubber pillar 214 and the limiting spring 512 can play a buffering role in the mold closing process, improve the stability of the mold closing process, and further improve the service life of the mold.

[0093] Cooling structures are provided in both the upper mold cavity 131 and the lower mold cavity 2110.

[0094] The cooling structure is a liquid cooling pipe 6, with both its inlet and outlet ends extending outwards. In practical use, coolant is circulated externally through the inlet and outlet ends, enabling rapid shaping of the finished product through liquid cooling, thereby improving product yield and production efficiency. Cooling water can be selected as the coolant in practical use.

[0095] The working principle of this invention is as follows: First, mold closing and injection molding are performed. The initial state of the mold is the closed state. The valve needle 1231 is driven by the cylinder 125 to open the dispensing nozzle core 1232. The casting material enters through the injection port 111 and enters the hot runner diversion manifold 126 through the branch pipe 1211. The casting material flows down uniformly and quickly through the hot runner diversion manifold 126 and flows out through the dispensing nozzle core 1232 into the injection cavity 4 for finished product casting.

[0096] After casting, the finished product is cooled and shaped by the liquid cooling pipe 6. Then, the fixed mold assembly 1 and the moving mold assembly 2 are separated by the injection molding machine. Then, the demolding operation begins. Specifically, during demolding, the pusher assembly 5 stably pushes out the support block 212 and the push plate 22 simultaneously, which drives the fixed core 41, the sliding core 42 and the finished product to move upward, so that the finished product is separated from the lower mold cavity 2110. Then, the demolding mechanism 3 is used to demold the finished product. The hydraulic cylinder 33 in the demolding mechanism 3 drives the moving slider 32 to move, which further drives the sliding core 42 to move away from the fixed core 41. In the process of moving, the finished product is first separated from the fixed core 41. Then, the sliding core 42 moves further and the demolding groove 221 makes the finished product detach from the sliding core 42, thus completing the demolding process.

[0097] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0098] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A two-channel hot runner molding die characterized by, The mold assembly (1) and the movable mold assembly (2) are in sliding fit; The fixed mold assembly (1) comprises a hot runner plate (12), an upper fixed plate (11) abutting to the upper side of the hot runner plate (12), and an upper forming mold plate (13) abutting to the lower side of the hot runner plate (12), the hot runner plate (12) is provided with a first shunt plate (121), the first shunt plate (121) is provided with a second shunt plate (122), the bottom end of the second shunt plate (122) is provided with a hot runner body (123), the top of the hot runner body (123) is provided with a heating ring (1230), the hot runner body (123) is provided with a copper sleeve heating ring (1234), the hot runner body (123) is provided with a valve needle (1231), the hot runner body (123) is provided with a valve sleeve (1235) allowing the valve needle (1231) to pass through, the first shunt plate (121) is provided with a heat insulation pad (124), the top end of the valve needle (1231) penetrates through the heat insulation pad (124) and is connected in communication with a gas cylinder (125), the gas cylinder (125) is fixed on the upper fixed plate (11), the second shunt plate (122) is provided with a hot runner shunt double-bifurcated pipe (126) of an integrated structure, the hot runner shunt double-bifurcated pipe (126) comprises a total hot flow port (1261) in communication with a glue injection pipe port (111) and a shunt hot runner (1262) in communication with the total hot flow port (1261), the shunt hot runner (1262) extends into the hot runner body (123), and the shunt hot runner (1262) in the hot runner body (123) is two shunt hot runners (1262) which are spaced apart and located on both sides of the valve needle (1231), the bottom end of the hot runner body (123) is provided with a glue outlet core (1232), the glue outlet core (1232) is provided with a nozzle head (1237), a nozzle core heating ring (1236) is arranged between the glue outlet core (1232) and the nozzle head (1237), the glue outlet core (1232) is provided with a heat insulation cap (1233), the bottom end of the shunt hot runner (1262) is provided with an inclined flow pipe (1263), two inclined flow pipes (1263) are symmetrically arranged and in communication with the glue outlet core (1232), and the valve needle (1231) is driven by the gas cylinder (125) to realize the opening and sealing of the bottom end port of the glue outlet core (1232); The movable mold assembly (2) comprises a movable mold plate (21), a push plate (22) arranged above the movable mold plate (21), and a support block (23) arranged below the movable mold plate (21), and the bottom surface of the support block (23) is provided with a bottom plate (24). The lower surface of the upper forming die plate (13) is formed with an upper die cavity (131), the movable die plate (21) is provided with a forming module (211) slidingly penetrating the push plate (22), the upper surface of the forming module (211) is formed with a lower die cavity (2110), the upper die cavity (131) and the lower die cavity (2110) form an injection cavity (4) therebetween, the glue outlet core (1232) communicates into the injection cavity (4), the injection cavity (4) is provided with a fixed core (41) and a sliding core (42) corresponding to the fixed core (41), and the demolding mechanism (3) is fixed to the push plate (22) and is arranged at one end of the sliding core (42) away from the fixed core (41) and is used for demolding the finished product.

2. The dual channel hot runner forming mold of claim 1 wherein, The inner wall of the hot runner shunt double-bifurcated pipe (126) is smooth, the top end of the shunt hot runner (1262) is an arc-shaped elbow structure, and the bottom end of the shunt hot runner (1262) is transitionally connected with the inclined flow pipe (1263) through an arc-shaped connecting piece (1264).

3. The dual channel hot runner forming mold of claim 2, wherein, The glue injection pipe (111) vertically penetrates the upper fixed plate (11) and the bottom end communicates into the first shunt plate (121), the first shunt plate (121) is provided with a branch pipe (1211) communicating the hot runner shunt double-bifurcated pipe (126) and the glue injection pipe (111).

4. The dual channel hot runner forming mold of claim 1 wherein, The forming module (211) vertically and slidingly penetrates the supporting block (212) for fixing and supporting the fixed core (41), the fixed core (41) is fixed to the side surface of the fixed core (41), the sliding core (42) is coaxially arranged with the fixed core (41) and is driven to move along the axial direction by the demolding mechanism (3), the free end of the fixed core (41) is provided with a limiting recess (411), the end of the sliding core (42) opposite to the fixed core (41) is provided with a positioning protrusion (421) matched with the limiting recess (411), and the outer wall of the free end of the sliding core (42) is circumferentially provided with a limiting clamping groove (422).

5. The dual channel hot runner forming mold of claim 4, wherein, The demolding mechanism (3) comprises a U-shaped frame (31) fixed to the push plate (22), the two side plates of the U-shaped frame (31) are provided with a moving sliding block (32) therebetween, the bottom plate between the two side plates of the U-shaped frame (31) is fixedly provided with a hydraulic oil cylinder (33) for driving the moving sliding block (32) to move, the end of the sliding core (42) away from the fixed core (41) is fixed to the moving sliding block (32), the side of the moving sliding block (32) away from the sliding core (42) is provided with a guide rod (34), and the bottom plate of the U-shaped frame (31) is provided with a through hole corresponding to the guide rod (34). The push plate (22) is provided with a demolding groove (221) allowing the sliding core (42) to pass through and not allowing the finished product to pass through.

6. The dual channel hot runner forming mold of claim 4, wherein, The supporting blocks (23) are two and are spaced apart, the movable die plate (21) and the bottom plate (24) are provided with a pushing assembly (5) between the two supporting blocks (23), and the pushing assembly (5) drives the supporting block (212) and the push plate (22) to move up and down.

7. The dual channel hot runner forming mold of claim 6 wherein, The pushing assembly (5) comprises a ejector bottom plate (51) and an ejector panel (52) fixed on the upper surface of the ejector bottom plate (51), and a guide column (53) penetrating through the ejector bottom plate (51) and the ejector panel (52) is arranged between the movable die plate (21) and the bottom plate (24). An ejector (511) is arranged on the upper surface of the ejector bottom plate (51), the ejector (511) penetrates through the ejector panel (52) and the movable die plate (21) in sequence and the top end of the ejector (511) is fixedly connected with the push plate (22), and the bottom end of the supporting block (212) is fixed on the ejector panel (52).

8. The dual channel hot runner forming mold of claim 7, wherein, A spring (512) is sleeved on the ejector (511) between the movable die plate (21) and the push plate (22), and the upper surface of the movable die plate (21) is provided with a limiting hole (213) for limiting the spring (512). The movable die plate (21) is fixedly provided with an elastic rubber column (214) protruding from the upper surface of the movable die plate (21), and the lower surface of the push plate (22) is provided with a positioning hole (222) corresponding to the elastic rubber column (214).

9. The dual channel hot runner forming mold of claim 1 wherein, The movable die plate (21) is provided with a guide column (215) penetrating through the push plate (22), and the bottom surface of the upper forming die plate (13) is formed with a guide sleeve (132) corresponding to the guide column (215).

10. The dual channel hot runner molding tool of any of claims 1-9, wherein, The upper die cavity (131) and the lower die cavity (2110) are both provided with cooling structures.

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