Injection molding screw for injection molding machine

Abstract

The utility model discloses an injection molding screw of an injection molding machine, comprising a metal screw and a pushing thread arranged on the outer wall of the metal screw, the pushing thread being spirally connected from left to right on the outer wall of the metal screw, a metal smooth rod being arranged at the right end of the metal screw, and a novel auxiliary hot-melt device being added inside the injection molding screw of the injection molding machine, the auxiliary hot-melt device can be energized and heated inside the injection molding screw of the injection molding machine through an electric heating rod, and the heat can be transferred to the injection molding screw of the injection molding machine, so that the injection molding screw of the injection molding machine keeps a high temperature when feeding materials, so that when the injection molding screw of the injection molding machine pushes the hot-melt raw material in the injection molding barrel through the pushing thread, the electric heating rod can further heat the hot-melt raw material through the heat transferred to the injection molding screw of the injection molding machine, so that the raw material pushed by the pushing thread is always kept in a hot-melt state, so as to prevent the situation that the pushed raw material is easily partially solidified due to a slightly low hot-melt temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field related to injection molds, and in particular relates to an injection screw for an injection molding machine. Background Art

[0002] With the advancement of manufacturing technology and changes in market demand, the performance and efficiency of injection molding machines, as key equipment for plastic processing, have an important impact on product quality and production efficiency. As the core component of the injection molding machine, the injection molding screw directly affects the process of plastic melting, mixing and injection. The new injection molding screw technology has significantly improved the production efficiency and product quality stability of the injection molding machine through structural optimization and functional integration, which meets the current industrial production requirements for efficient, precise and reliable processing equipment. This technical background provides strong support for further promoting the technological innovation and application of injection molding machines, and is expected to be widely used and promoted in the plastic processing industry.

[0003] However, the injection screw of the injection molding machine is mainly used to push the hot-melt raw material in the injection barrel into the injection mold. During the injection molding process, the electric heating mechanism on the injection barrel will heat the raw material in the barrel, so that the raw material in the barrel is heated to a hot-melt state, and the injection screw will push the hot-melt raw material into the injection mold through the pushing thread on the outer wall. However, when the electric heating mechanism on the injection barrel has unstable power supply or failure, the hot-melt raw material inside the injection barrel will lose temperature and partially solidify, which will cause blockage inside the injection barrel, and the local hot-melt raw material will firmly adhere to the outer wall of the injection screw, which will make it difficult to clean the attached raw material. Utility Model Content

[0004] The purpose of the utility model is to provide an injection molding screw for an injection molding machine, so as to solve the problem raised in the above background technology that when the electric heating mechanism on the injection molding cylinder has unstable power supply or failure, the hot-melt material inside the injection molding cylinder will lose temperature and partially solidify, which will cause blockage inside the injection molding cylinder, and the local hot-melt material will firmly adhere to the outer wall of the injection molding screw, which will make it difficult to clean the attached material.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection molding screw for an injection molding machine, comprising a metal screw and a push thread arranged on the outer wall of the metal screw, the push thread being spirally connected from left to right on the outer wall of the metal screw, a metal polished rod being arranged at the right end of the metal screw, the metal screw and the metal polished rod being made by turning a whole metal rod, and an auxiliary hot-melt device being connected inside the metal screw and the metal polished rod;

[0006] The auxiliary hot melt device includes an electric heating hole, an electric heating rod, a guide rod hole and a conductive guide rod. The electric heating hole is arranged inside the center of the metal screw, the right end of the electric heating hole is connected to the guide rod hole, the guide rod hole is located inside the metal bare rod, the electric heating rod is arranged inside the electric heating hole, the conductive guide rod is arranged inside the guide rod hole, and the left end of the conductive guide rod is fixedly connected to the right end of the electric heating rod.

[0007] Preferably, the length of the electric heating rod is shorter than that of the metal screw rod, the length of the guide rod hole is shorter than that of the metal bare rod, and a heat-resistant insulating sleeve is sleeved on the outer wall of the conductive guide rod.

[0008] Preferably, the auxiliary hot melt device also includes a conductive ring, an insulating limiting ring, an electrical connector, a spring conductive rod and a through hole. The top of the right end of the guide rod hole is connected with a through hole, and a spring conductive rod is arranged in the through hole. The bottom end of the spring conductive rod is fixedly connected to the right end of the conductive guide rod, and the spring conductive rod can be extended and retracted up and down.

[0009] Preferably, insulating limiting rings are provided on both sides of the through hole, and the two insulating limiting rings are both sleeved and fixed on the outer wall of the metal rod. A conductive ring is provided between the two insulating limiting rings, and the conductive ring is sleeved on the outside of the metal rod.

[0010] Preferably, an electrical connector is provided on the outer wall of the top end of the conductive ring, the top end of the spring conductive rod is in contact with the inner wall of the conductive ring, and the conductive ring can rotate clockwise or counterclockwise outside the metal bare rod.

[0011] Preferably, a transmission gear is provided at the right end of the metal polished rod, the diameter of the transmission gear is larger than the diameter of the metal polished rod, and the circles of the transmission gear and the metal polished rod are on the same horizontal straight line.

[0012] Preferably, a screw head is provided at the left end of the metal screw, the left half of the screw head is conical, and a plurality of inwardly recessed pushing grooves are equidistantly provided on the outer wall of the screw head.

[0013] Preferably, a threaded fixing head is arranged at the center of the right end of the screw head, a threaded fixing hole is arranged inside the left end of the metal screw, and the threaded fixing head is threadably inserted in the threaded fixing hole.

[0014] Compared with the prior art, the utility model provides an injection molding screw for an injection molding machine, which has the following beneficial effects:

[0015] The utility model adds a novel auxiliary hot-melt device inside the injection molding screw of the injection molding machine. The auxiliary hot-melt device can be connected to the external power supply wire through the electric connector on the conductive ring. After the electric connector is used to supply power to the electric heating rod of the auxiliary hot-melt device, the electric heating rod can be energized and heated inside the injection molding screw of the injection molding machine. The heat will be transferred to the injection molding screw of the injection molding machine, so that the injection molding screw of the injection molding machine keeps a high temperature when feeding. In this way, when the injection molding screw of the injection molding machine pushes the hot-melt raw material in the injection molding barrel through the pushing thread, the electric heating rod will further heat the hot-melt raw material through the heat transferred to the injection molding screw of the injection molding machine, so that the raw material pushed by the pushing thread always maintains a hot-melt state, thereby preventing the hot-melt temperature from being slightly low and causing the pushed raw material to be locally solidified. At the same time, the injection molding screw of the injection molding machine keeps a high temperature itself, which can also avoid the situation that the hot-melt raw material is excessively attached to the outer wall of the screw, thereby preventing the hot-melt raw material from excessively adhering to the outer wall of the screw and being difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the plane structure of an injection molding screw of an injection molding machine.

[0017] Figure 2 It is a schematic diagram of the planar structure of the screw head of the utility model.

[0018] Figure 3 It is a schematic diagram of the overall planar structure of the auxiliary hot-melt device of the utility model.

[0019] Figure 4 It is a partial planar structural schematic diagram of the auxiliary hot-melt device of the utility model.

[0020] In the figure: 1. Screw head; 2. Metal screw; 3. Push thread; 4. Metal bare rod; 5. Auxiliary hot melt device; 6. Transmission gear; 7. Threaded fixing head; 8. Threaded fixing hole; 9. Electric heating hole; 10. Electric heating rod; 11. Guide rod hole; 12. Conductive guide rod; 13. Conductive ring; 14. Insulation limiting ring; 15. Electric connector; 16. Spring conductive rod; 17. Perforation. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-4The injection molding screw of an injection molding machine shown in the figure comprises a metal screw 2 and a pushing thread 3 arranged on the outer wall of the metal screw 2. The pushing thread 3 is spirally connected from left to right on the outer wall of the metal screw 2. A metal polished rod 4 is arranged at the right end of the metal screw 2. The metal screw 2 and the metal polished rod 4 are made of a whole metal rod by turning. A transmission gear 6 is arranged at the right end of the metal polished rod 4. The diameter of the transmission gear 6 is larger than the diameter of the metal polished rod 4. The circles of the transmission gear 6 and the metal polished rod 4 are on the same horizontal straight line. A screw head 1 is arranged at the left end of the metal screw 2. The left half of the screw head 1 is conically arranged. A plurality of inwardly recessed pushing grooves are equidistantly arranged on the outer wall of the screw head 1. A threaded fixing head 7 is arranged at the center of the right end of the screw head 1. A threaded fixing hole 8 is arranged inside the left end of the metal screw 2. The threaded fixing head 7 is threadedly inserted into the threaded fixing hole 8. The injection molding machine injection molding machine is installed and used. When molding the screw, first, it is necessary to insert the threaded fixing head 7 at the right end of the screw head 1 into the threaded fixing hole 8 inside the left end of the metal screw 2, and then tighten the threaded fixing head 7 so that the screw head 1 is firmly fixed to the left end of the metal screw 2, and then the metal screw 2 and the screw head 1 need to be inserted into the injection molding barrel. After being plugged in place, the transmission gear 6 at the right end of the metal bare rod 4 is exposed outside the right end of the injection molding barrel, and then the transmission gear 6 needs to be connected to the power gear of the external power equipment so that the external power equipment transmits the transmission gear 6 through the gear, so that the metal screw 2 can be driven to rotate. After the raw material is injected into the injection molding barrel, the hot melt mechanism on the injection molding barrel heats the raw material inside the injection molding barrel so that the raw material is hot-melted, and the rotating metal screw 2 will push the hot-melt raw material in the injection molding direction by pushing and pulling the thread, and finally inject the hot-melt raw material into the injection mold.

[0023] like Figure 1 , Figure 3 and Figure 4As shown, the metal screw 2 and the metal polished rod 4 are internally connected with an auxiliary hot-melt device 5, the auxiliary hot-melt device 5 includes an electric heating hole 9, an electric heating rod 10, a guide rod hole 11 and a conductive guide rod 12. The metal screw 2 is provided with an electric heating hole 9 at the center thereof, the right end of the electric heating hole 9 is connected with the guide rod hole 11, the guide rod hole 11 is located inside the metal polished rod 4, the electric heating hole 9 is provided with an electric heating rod 10, the guide rod hole 11 is provided with a conductive guide rod 12, the left end of the conductive guide rod 12 is fixedly connected to the right end of the electric heating rod 10, the length of the electric heating rod 10 is less than the length of the metal screw 2, the length of the guide rod hole 11 is less than the length of the metal polished rod 4, the conductive guide rod 12 is A heat-resistant insulating sleeve is also sleeved on the outer wall. The auxiliary hot melt device 5 also includes a conductive ring 13, an insulating limiting ring 14, an electrical connector 15, a spring conductive rod 16 and a through hole 17. The top of the right end of the guide rod hole 11 is connected to the through hole 17. The spring conductive rod 16 is arranged in the through hole 17. The bottom end of the spring conductive rod 16 is fixedly connected to the right end of the conductive guide rod 12. The spring conductive rod 16 can be extended and retracted up and down. Insulating limiting rings 14 are arranged on the left and right sides of the through hole 17. The two insulating limiting rings 14 are both sleeved and fixed on the outer wall of the metal light rod 4. A conductive ring 13 is arranged between the two insulating limiting rings 14. The conductive ring 13 is sleeved on the outside of the metal light rod 4.

[0024] like Figure 1 , Figure 3 and Figure 4 As shown, an electric connector 15 is provided on the outer wall of the top of the conductive ring 13, and the top of the spring conductive rod 16 contacts the inner wall of the conductive ring 13. The conductive ring 13 can rotate clockwise or counterclockwise on the outside of the metal bare rod 4. After the injection molding screw is installed in the injection molding cylinder, the auxiliary hot melt device 5 needs to be connected with the external power supply mechanism wire. Specifically, the electric connector 15 on the conductive ring 13 needs to be connected with the external power supply mechanism wire, so that the external power supply mechanism can supply power to the electric heating rod 10 in the electric heating hole 9, and the electric heating rod 10 will generate heat after being energized, and the external power supply mechanism can control the electric heating temperature of the electric heating rod 10 by changing the power supply, and the electric heating rod 10 will transfer the high temperature to the injection molding screw, so that The entire injection molding screw is heated, so that local solidification of the hot-melt raw material conveyed by the injection molding screw can be avoided, and the hot-melt raw material is ensured to be always in a hot-melt state and injected into the injection mold. When the injection molding screw pushes the hot-melt raw material into the injection mold by rotating, the conductive ring 13 rotates outside the metal bare rod 4, so it will not hinder the normal rotation of the entire injection molding screw to complete the pushing injection molding. When the conductive ring 13 rotates, the top of the spring conductive rod 16 in the through hole 17 is always in contact with the inside of the conductive ring 13, so it can ensure stable electrical transmission, ensure that the electric heating rod 10 can be powered and heated all the time, so that the auxiliary electric heating device can be powered and heated all the time.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding screw for an injection molding machine, comprising a metal screw (2) and a push thread (3) arranged on the outer wall of the metal screw (2), wherein the push thread (3) is spirally connected from left to right on the outer wall of the metal screw (2), and a metal polished rod (4) is arranged at the right end of the metal screw (2), wherein the metal screw (2) and the metal polished rod (4) are made of a whole metal rod by turning, and characterized in that: The metal screw (2) and the metal polished rod (4) are internally connected with an auxiliary hot-melt device (5); The auxiliary hot-melt device (5) comprises an electric heating hole (9), an electric heating rod (10), a guide rod hole (11) and a conductive guide rod (12); the electric heating hole (9) is arranged inside the center of the metal screw (2); the right end of the electric heating hole (9) is connected to the guide rod hole (11); the guide rod hole (11) is located inside the metal bare rod (4); the electric heating rod (10) is arranged inside the electric heating hole (9); the conductive guide rod (12) is arranged inside the guide rod hole (11); the left end of the conductive guide rod (12) is fixedly connected to the right end of the electric heating rod (10).

2. The injection molding screw of an injection molding machine according to claim 1, characterized in that: The length of the electric heating rod (10) is shorter than that of the metal screw rod (2), the length of the guide rod hole (11) is shorter than that of the metal bare rod (4), and a heat-resistant insulating sleeve is sleeved on the outer wall of the conductive guide rod (12).

3. The injection molding screw of an injection molding machine according to claim 2, characterized in that: The auxiliary hot-melt device (5) further comprises a conductive ring (13), an insulating limiting ring (14), an electrical connector (15), a spring conductive rod (16) and a through hole (17); the top of the right end of the guide rod hole (11) is connected with the through hole (17); a spring conductive rod (16) is arranged in the through hole (17); the bottom end of the spring conductive rod (16) is fixedly connected to the right end of the conductive guide rod (12); and the spring conductive rod (16) can be extended up and down.

4. The injection molding screw of an injection molding machine according to claim 3, characterized in that: Insulating limiting rings (14) are arranged on both sides of the through hole (17), and the two insulating limiting rings (14) are both sleeved and fixed on the outer wall of the metal rod (4). A conductive ring (13) is arranged between the two insulating limiting rings (14), and the conductive ring (13) is sleeved on the outside of the metal rod (4).

5. The injection molding screw of an injection molding machine according to claim 4, characterized in that: The outer wall of the top end of the conductive ring (13) is provided with an electric connector (15), the top end of the spring conductive rod (16) contacts the inner wall of the conductive ring (13), and the conductive ring (13) can rotate clockwise or counterclockwise outside the metal bare rod (4).

6. The injection molding screw of an injection molding machine according to claim 1, characterized in that: A transmission gear (6) is arranged at the right end of the metal polished rod (4); the diameter of the transmission gear (6) is larger than the diameter of the metal polished rod (4); and the circles of the transmission gear (6) and the metal polished rod (4) are located on the same horizontal straight line.

7. The injection molding screw of an injection molding machine according to claim 1, characterized in that: A screw head (1) is arranged at the left end of the metal screw (2); the left half of the screw head (1) is arranged in a conical shape; and a plurality of inwardly recessed pushing grooves are arranged at equal intervals on the outer wall of the screw head (1).

8. The injection molding screw of an injection molding machine according to claim 7, characterized in that: A threaded fixing head (7) is arranged at the center of the right end of the screw head (1), a threaded fixing hole (8) is arranged inside the left end of the metal screw (2), and the threaded fixing head (7) is threadedly inserted into the threaded fixing hole (8).

Images