Injection mold with preheating anti-blocking conveying pipe

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold with a preheating anti-blocking material conveying pipe, which comprises an injection mold body, an injection molding pipe is arranged at the top of an upper mold of the injection mold body, the injection molding pipe is connected with a preheating anti-blocking material conveying assembly, and the preheating anti-blocking material conveying assembly comprises a material conveying pipe. A conical extrusion pipe is integrally formed at the bottom end of the material conveying pipe, an electric heating wire is arranged on the outer side of the material conveying pipe, the outer side of the electric heating wire is wrapped with a heat preservation sleeve, an auger is coaxially arranged in the material conveying pipe, a pipe cover is connected to the top of the material conveying pipe in a sealed mode, a motor is fixedly installed at the top of the pipe cover, and a molten material input connector is arranged on the outer wall of the material conveying pipe. According to the injection mold with the preheating anti-blocking material conveying pipe, through the synergistic effect of the spiral electric heating wire arranged on the outer side of the material conveying pipe and the heat preservation sleeve, the material conveying pipe can be evenly heated, heat loss is reduced, the temperature stability of molten materials is effectively maintained, and the problems of material cooling solidification and blocking caused by temperature fluctuation are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is injection mold with preheating anti -blocking feed pipe. BACKGROUND

[0002] Injection mold is an important tool for manufacturing plastic products in industrial production, which mainly heats the plastic raw materials to the molten state by injection molding machine and injects into the mold cavity, and forms a specific shape of plastic product after cooling and solidification. Injection mold is widely used in electronic, automobile, medical, daily necessities and other fields, and is an indispensable key equipment in modern manufacturing industry. The structure of injection mold generally includes fixed mold and movable mold, which forms a mold cavity after combination, and is used for the molding of plastic products. Its working principle is to inject molten plastic into the mold cavity at high pressure by injection molding machine and cool to form, thereby realizing high-precision and large-batch production.

[0003] The utility model discloses a kind of injection molds of preventing runner from being blocked, including upper mold, the upper end surface of the upper mold is equipped with circular plate by roller bearing, both sides of the upper end surface of the circular plate are equipped with one injection pipe, and the lower side of the outer surface of the injection pipe is equipped with injection pipe mouth, the lower side of the second injection pipe from left to right is equipped with one dredging head.The lower end surface of the upper mold is equipped with lower mold, the lower mold is equipped with forming groove between the upper mold, the middle position of the inner wall of the upper end of the forming groove is equipped with inclined injection hole.The utility model is equipped with one injection pipe in both sides of the upper end surface of the circular plate, and the lower side of the second injection pipe from left to right is equipped with one dredging head, can be moved upwards by starting stepper motor using dredging head, to dredge the inside of the second injection pipe, by the above technical solution, to effectively prevent the blockage of injection pipe when using this equipment.

[0004] Although the technology can effectively prevent the blockage of injection pipe of injection mold, the problem of feed pipe blockage of injection mold in actual use process has not been solved. Feed pipe is a key component connecting injection molding machine and mold, which is used to transport molten plastic material in injection molding machine to the runner of mold. Since the feed pipe usually has a certain length, during material transportation, affected by temperature fluctuation or uneven heat transfer, material cooling and solidification, jamming and other blockage phenomena are prone to occur, thereby seriously affecting injection efficiency and product quality. To solve this problem, we propose an injection mold with preheating anti-blocking feed pipe, which effectively solves the problem of feed pipe blockage by improving the structure and function design of feed pipe, and improves the working stability and production efficiency of injection equipment. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing injection mold with preheating anti-blocking feed pipe to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The injection mold with preheating anti-blocking material conveying pipe comprises an injection mold body, the injection mold body is used for providing a molding cavity, the injection mold is prior art and will not be described in detail, a injection pipe is arranged on the top of the injection mold body, the injection pipe is used for connecting a preheating anti-blocking material conveying assembly and conveying material to the cavity, the injection pipe is connected with the preheating anti-blocking material conveying assembly, and the preheating anti-blocking material conveying assembly is used for heating, conveying molten material and preventing blockage.

[0008] The preheating anti-blocking material conveying assembly comprises a material conveying pipe, the material conveying pipe is used as the main channel for conveying molten material, the bottom end of the material conveying pipe is integrally formed with a conical extrusion pipe communicated with the injection pipe, the conical extrusion pipe is used for enhancing extrusion pressure of the material, the outer side of the material conveying pipe is provided with an electric heating wire, the electric heating wire is used for uniformly heating the material conveying pipe to prevent solidification of the material, the outer side of the electric heating wire is covered with a heat preservation sleeve, and the heat preservation sleeve is used for reducing heat loss and improving heating efficiency.

[0009] A screw auger is coaxially arranged in the material conveying pipe, the screw auger is used for stirring and pushing the material to flow downward to prevent blockage, a pipe cover is sealingly connected to the top of the material conveying pipe and is used for sealing the top of the material conveying pipe and fixing a motor, the top of the pipe cover is fixedly provided with a motor, the output shaft of the motor penetrates through the pipe cover and is drivingly connected with the screw auger, and a molten material input joint is arranged through the outer wall of the material conveying pipe and close to the top, the molten material input joint is used for connecting an injection molding machine and guiding molten material into the material conveying pipe.

[0010] Preferably, a first flange plate is fixedly arranged on the top of the outer wall of the injection pipe, a second flange plate is fixedly arranged on the bottom of the outer wall of the conical extrusion pipe, the first flange plate is detachably connected with the second flange plate through bolts and nuts, and the second flange plate is used for sealingly connecting with the first flange plate.

[0011] Preferably, a first annular groove is arranged on the top of the first flange plate, a second annular groove corresponding to the first annular groove is arranged on the bottom of the second flange plate, and a rubber ring is arranged between the first annular groove and the second annular groove, and the rubber ring is used for preventing leakage of high-temperature molten material.

[0012] Preferably, the electric heating wire is spirally and uniformly wound along the axial direction of the outer wall of the material conveying pipe, the spirally arranged heating wire ensures uniform heating of the material conveying pipe, the top end of the electric heating wire starts below the molten material input joint, and the bottom end extends to the bottom of the outer wall of the material conveying pipe.

[0013] Preferably, the insulation sleeve is made of aluminum silicate fiber, which is resistant to high temperatures and has low thermal conductivity. An outer sheath is provided on the outside of the insulation sleeve, which is used to protect the insulation sleeve and enhance structural strength. The outer sheath is made of flame-retardant silicone, which is resistant to high temperatures and has flame-retardant properties.

[0014] Preferably, the outer wall of the auger is gapped with the inner wall of the feed pipe and the gap is less than 1 mm, and the bottom end of the auger extends into the conical section of the conical extrusion tube to prevent material accumulation at the outlet.

[0015] Preferably, a first U-shaped avoidance opening is provided on the top of the outer wall of the thermal insulation sleeve, and the molten material input joint passes through the first U-shaped avoidance opening.

[0016] Preferably, a second U-shaped avoidance opening is provided at the top of the outer wall of the outer sheath, and the molten material input joint passes through the second U-shaped avoidance opening.

[0017] Preferably, the top of the inner wall of the thermal insulation sleeve is bonded to the outer wall of the feed pipe, and the inner wall of the thermal insulation sleeve is provided with a groove for accommodating the electric heating wire.

[0018] Preferably, the inner wall of the outer sheath fits tightly with the outer wall of the insulation sleeve, which improves the insulation and protection effects, and the two ends of the outer sheath are fixed to the outside of the feed pipe by clamps, which fix the outer sheath to prevent it from loosening and falling off.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The injection mold with a preheated anti-clogging feed pipe can evenly heat the feed pipe and reduce heat loss through the synergistic effect of the spiral electric heating wire and the insulation sleeve set on the outside of the feed pipe, effectively maintaining the temperature stability of the molten material and preventing the material from cooling, solidifying and clogging due to temperature fluctuations.

[0021] 2. This injection mold with a preheated, anti-clogging feed pipe has a coaxially arranged auger inside the feed pipe that rotates continuously under the drive of a motor. It not only stirs the molten material to prevent local accumulation, but also pushes the material downward. This dual action significantly reduces the risk of stagnation or blockage inside the feed pipe, and improves the continuity and efficiency of material transportation.

[0022] 3. The injection mold with preheated anti-clogging feed pipe has a sealed connection between the injection pipe and the feed pipe through a flange and a rubber ring embedded in the annular groove, ensuring that the molten material does not leak under high temperature and high pressure environments. At the same time, the detachable design of the flange facilitates component disassembly and maintenance.

[0023] 4. The injection mold with preheating anti-blocking material conveying pipe, the close-fitting design of the heat preservation sleeve and the outer protective sleeve is combined with the clamp fixing, which not only protects the internal heating element from mechanical damage, but also further reduces heat energy loss through the double-layer heat insulation structure, guarantees the heating efficiency and prolongs the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the utility model;

[0025] Figure 2 It is a partial assembly structure schematic view of the utility model;

[0026] Figure 3 It is a partial structure schematic view of the preheating anti-blocking material conveying assembly in the utility model;

[0027] Figure 4 It is a partial structure schematic view of the preheating anti-blocking material conveying assembly in the utility model;

[0028] Figure 5 It is a partial cross section structure schematic view of the preheating anti-blocking material conveying assembly in the utility model;

[0029] Figure 6 It is a partial structure schematic view of the preheating anti-blocking material conveying assembly in the utility model;

[0030] Figure 7 It is a partial cross section structure schematic view of the preheating anti-blocking material conveying assembly in the utility model;

[0031] Figure 8 It is a cross section structure schematic view of the heat preservation sleeve and the outer protective sleeve in the utility model;

[0032] In the drawing: 100, injection mold body; 110, injection pipe; 120, first flange plate; 121, first annular groove; 200, preheating anti-blocking material conveying assembly; 210, material conveying pipe; 220, conical extrusion pipe; 230, second flange plate; 231, second annular groove; 240, auger; 250, pipe cover; 260, motor; 270, molten material input joint; 280, electric heating wire; 290, heat preservation sleeve; 291, first U-shaped avoidance opening; 2100, outer protective sleeve; 2101, second U-shaped avoidance opening; 300, rubber ring. DETAILED DESCRIPTION

[0033] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] Please refer to Figures 1-8 The present application provides a technical scheme:

[0036] The injection mold with preheating anti-blocking material conveying pipe comprises an injection mold body 100, the injection mold body 100 is used for providing a molding cavity, the injection mold is a mature technology, and details are not repeated here, an injection pipe 110 is arranged at the top of the upper mold of the injection mold body 100, the injection pipe 110 is used for connecting a preheating anti-blocking material conveying assembly 200 and conveying material to the cavity, the injection pipe 110 is connected with the preheating anti-blocking material conveying assembly 200, and the preheating anti-blocking material conveying assembly 200 is used for heating, conveying molten material and preventing blocking;

[0037] The preheating anti-blocking material conveying assembly 200 comprises a material conveying pipe 210, the material conveying pipe 210 serves as a main channel for conveying molten material, a conical extrusion pipe 220 in communication with the injection pipe 110 is integrally formed at the bottom end of the material conveying pipe 210, the conical extrusion pipe 220 is used for enhancing the extrusion pressure of the material, an electric heating wire 280 is arranged on the outer side of the material conveying pipe 210, the electric heating wire 280 is used for uniformly heating the material conveying pipe 210 to prevent the material from solidifying, and a heat preservation sleeve 290 is arranged on the outer side of the electric heating wire 280, the heat preservation sleeve 290 is used for reducing heat loss and improving heating efficiency;

[0038] A screw auger 240 is coaxially arranged in the material conveying pipe 210, and is used to stir and push the material to flow downward to prevent blockage. A pipe cover 250 is sealingly connected to the top of the material conveying pipe 210, and is used to seal the top of the material conveying pipe 210 and fix a motor 260. The motor 260 is fixedly installed on the top of the pipe cover 250. An output shaft of the motor 260 penetrates through the pipe cover 250 and is in driving connection with the screw auger 240. A molten material input joint 270 is penetratingly arranged on the outer wall of the material conveying pipe 210 and close to the top, and is used to connect an injection molding machine and guide the molten material into the material conveying pipe 210.

[0039] In the embodiment, the first flange plate 120 is fixedly arranged on the top of the outer wall of the injection pipe 110, and the second flange plate 230 is fixedly arranged on the bottom of the outer wall of the conical extrusion pipe 220. The first flange plate 120 is detachably connected with the second flange plate 230 through bolts and nuts. The second flange plate 230 is used to sealingly connect with the first flange plate 120.

[0040] Specifically, the first annular groove 121 is arranged on the top of the first flange plate 120, and the second annular groove 231 corresponding to the first annular groove 121 is arranged on the bottom of the second flange plate 230. The rubber ring 300 is arranged between the first annular groove 121 and the second annular groove 231. The rubber ring 300 is used to prevent the leakage of high-temperature molten material.

[0041] Further, the electric heating wire 280 is spirally and uniformly wound along the axial direction of the outer wall of the material conveying pipe 210. The spirally arranged heating wire ensures that the material conveying pipe 210 is uniformly heated. The top end of the electric heating wire 280 starts below the molten material input joint 270, and the bottom end extends to the bottom of the outer wall of the material conveying pipe 210.

[0042] Further, the heat preservation sleeve 290 is made of aluminum silicate fiber. The aluminum silicate fiber heat preservation sleeve 290 can withstand high temperature and has low thermal conductivity. The outer side of the heat preservation sleeve 290 is provided with an outer sheath 2100. The outer sheath 2100 is used to protect the heat preservation sleeve 290 and enhance the structural strength. The outer sheath 2100 is made of flame-retardant silicone. The flame-retardant silicone outer sheath 2100 can withstand high temperature and has flame-retardant properties.

[0043] Further, the outer wall of the screw auger 240 is gap-fitted with the inner wall of the material conveying pipe 210, and the gap is less than 1 mm. The bottom end of the screw auger 240 extends into the conical section of the conical extrusion pipe 220. The bottom end extending into the conical section prevents the material from accumulating at the outlet.

[0044] Further, the top of the outer wall of the heat preservation sleeve 290 is provided with a first U-shaped avoiding opening 291. The molten material input joint 270 penetrates through the first U-shaped avoiding opening 291.

[0045] Further, the top of the outer wall of the outer sheath 2100 is provided with a second U-shaped avoiding opening 2101, and the molten material input joint 270 passes through the second U-shaped avoiding opening 2101.

[0046] Further, the top of the inner wall of the heat preservation sleeve 290 is bonded to the outer wall of the material conveying pipe 210, and the inner wall of the heat preservation sleeve 290 is provided with a groove for accommodating the electric heating wire 280.

[0047] Further, the inner wall of the outer sheath 2100 is tightly combined with the outer wall of the heat preservation sleeve 290, the tight combination improves the heat insulation and protection effect, and the two ends of the outer sheath 2100 are fixed to the outer side of the material conveying pipe 210 through the clamps, the clamps fix the outer sheath 2100 to prevent the outer sheath 2100 from loosening and falling off.

[0048] It should be noted that the motor 260 in the utility model is connected with a power supply and a controller, the electric heating wire 280 is connected with a power supply and a temperature controller, the components are general standard components or components known by the person skilled in the art, the structure and principle thereof can be known by the person skilled in the art through a technical manual or through a conventional experimental method, the specific connecting means should be completed according to the working sequence of the electrical devices in the above working principle, the detailed connecting means is the known technology in the art, the working principle and process are mainly introduced above, and the electrical control is not described.

[0049] The preheating anti-blocking material conveying pipe injection mold of the embodiment is used as follows: first, the preheating anti-blocking material conveying assembly 200 is connected to the upper mold top of the injection mold body 100 through the injection pipe 110, specifically through the bolt connection of the first flange plate 120 and the second flange plate 230 to realize the detachable sealing and fixing between the assemblies, wherein the rubber ring 300 embedded between the first annular groove 121 and the second annular groove 231 is used to prevent material leakage; then, the molten material input joint 270 is communicated with the material conveying system of the injection molding machine, the molten material enters the inside of the material conveying pipe 210 from the molten material input joint 270, the electric heating wire 280 is started to uniformly heat the outer wall of the material conveying pipe 210, and the heat loss is reduced through the cooperation of the spiral electric heating wire 280 and the heat preservation sleeve 290 made of aluminum silicate fiber to maintain the material temperature; at the same time, the motor 260 is started to drive the auger 240 to rotate in the material conveying pipe 210, the auger 240 pushes and stirs the material to prevent it from cooling and accumulating during the conveying process, the bottom end of the auger 240 extends into the conical section of the conical extrusion pipe 220 to ensure that the material smoothly enters the injection pipe 110; the heat preservation sleeve 290 outside the material conveying pipe 210 and the outer sheath 2100 form double-layer protection through close fitting and clamp fixing, the outer sheath 2100 is made of flame-retardant silica gel to protect the internal structure; finally, the molten material is injected into the runner of the injection mold body 100 after being pressurized by the conical extrusion pipe 220, and then enters the mold cavity to complete the injection molding, and the whole process effectively prevents the material conveying pipe 210 from being blocked through the synergistic effect of heating, stirring and sealing design.

[0050] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, the above embodiments and descriptions in the specification are only preferred examples of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. Injection mold with preheating anti-clogging feed channel, comprising an injection mold body (100), characterized in that: The upper mold top of the injection mold body (100) is provided with an injection tube (110), the injection tube (110) is connected with a preheating anti-blocking conveying assembly (200), the preheating anti-blocking conveying assembly (200) comprises a conveying pipe (210), the bottom end of the conveying pipe (210) is integrally formed with a conical extrusion pipe (220) communicated with the injection tube (110), the outer side of the conveying pipe (210) is provided with an electric heating wire (280), the outer side of the electric heating wire (280) is covered with a heat preservation sleeve (290), the conveying pipe (210) is coaxially provided with an auger (240), the top of the conveying pipe (210) is sealingly connected with a pipe cover (250), the top of the pipe cover (250) is fixedly installed with a motor (260), the output shaft of the motor (260) penetrates through the pipe cover (250) and is drivingly connected with the auger (240), the outer wall of the conveying pipe (210) and the position close to the top are provided with a molten material input joint (270).

2. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The outer wall top of the injection tube (110) is fixedly provided with a first flange plate (120), the outer wall bottom of the conical extrusion pipe (220) is fixedly provided with a second flange plate (230), the first flange plate (120) and the second flange plate (230) are detachably connected through bolts and nuts.

3. The injection mold with a preheating anti-clogging feed tube according to claim 2, characterized in that: The top of the first flange plate (120) is provided with a first annular groove (121), the bottom of the second flange plate (230) is provided with a second annular groove (231) corresponding to the first annular groove (121), and a rubber ring (300) is embedded between the first annular groove (121) and the second annular groove (231).

4. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The electric heating wire (280) is spirally and uniformly wound along the axial direction of the outer wall of the conveying pipe (210), the top end of the electric heating wire (280) starts below the molten material input joint (270), and the bottom end extends to the bottom of the outer wall of the conveying pipe (210).

5. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The heat preservation sleeve (290) is made of aluminum silicate fiber, and the outer side of the heat preservation sleeve (290) is provided with an outer sheath (2100) made of flame-retardant silicone.

6. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The outer wall of the auger (240) is gap-fitted with the inner wall of the conveying pipe (210), and the gap is less than 1mm, and the bottom end of the auger (240) extends into the conical section of the conical extrusion pipe (220).

7. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The top of the outer wall of the heat preservation sleeve (290) is provided with a first U-shaped avoiding opening (291), and the molten material input joint (270) passes through the first U-shaped avoiding opening (291).

8. The injection mold with a preheating anti-clogging feed tube according to claim 5, characterized in that: The top of the outer wall of the outer sheath (2100) is provided with a second U-shaped avoiding opening (2101), and the molten material input joint (270) passes through the second U-shaped avoiding opening (2101).

9. The injection mold with a preheating anti-clogging feed tube according to claim 1, characterized in that: The top of the inner wall of the heat preservation sleeve (290) is bonded to the outer wall of the conveying pipe (210), and the inner wall of the heat preservation sleeve (290) is provided with a groove for accommodating the electric heating wire (280).

10. The injection mold with a preheating anti-clogging feed tube according to claim 5, characterized in that: The inner wall of the outer sheath (2100) is closely attached to the outer wall of the heat preservation sleeve (290), and the two ends of the outer sheath (2100) are fixed on the outer side of the material conveying pipe (210) through the clamp.

Images