A mold with an improved hot runner structure

Abstract

The utility model relates to mould technical field especially a mould of hot runner structure improvement, a plurality of hot nozzles are fixedly connected below the cavity, a plurality of shunt pipes are fixedly connected below the hot nozzle. This mould of hot runner structure improvement, the external pipeline is sleeved on the injection pipe top, when the inclined plane and the taper groove contact, make the injection pipe move to the taper groove center, can play the role of guiding, then rotate the external pipeline, and tighten it on the injection pipe outside, when the rubber plug outer wall and the taper groove abut tightly, stop rotating the external pipeline, to realize can make the external pipeline and injection pipe alignment fast, need not repeatedly adjust, convenient for quick connection, rotate a plurality of bolts, make the bolt end from the second threaded hole and the first threaded hole spin out, then take out the cover plate from the slot, to realize when cleaning the hot nozzle or shunt pipe, only need to remove the cover plate, need not to disassemble other parts, need shorter time to carry out the cleaning work.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a mold with an improved hot runner structure. Background Technology

[0002] Hot runner molds are an advanced, efficient, and energy-saving mold technology in the injection molding field. Their core feature is the use of a "hot runner system" within the mold, which keeps the plastic material in the runners molten throughout the injection process, avoiding the "runner solidification" that occurs in traditional cold runner molds. This not only significantly improves production efficiency and product quality but also reduces material waste.

[0003] For example, a hot runner mold with announcement number "CN220008658U" incorporates auxiliary structures to improve processing efficiency. Multiple injection ports allow the lower mold to process multiple products simultaneously, increasing efficiency. A heater heats the material inside the nozzle, preventing solidification and waste. The fit between nuts, gaskets, and sealing grooves seals the connection between the injection port and external piping, preventing leakage and waste. However, this mold requires precise alignment and repeated adjustments when connecting the injection port to external piping, hindering quick connection. Furthermore, the nozzles and injection ports are located inside the hot runner mold body; blockage necessitates the removal of multiple components (such as the mold body and manifold) for cleaning, requiring considerable time. Utility Model Content

[0004] The purpose of this invention is to solve the problems that when the injection port is connected to the external pipeline, precise alignment and repeated adjustments are required, which makes it inconvenient to make quick connections. At the same time, when the hot nozzle or injection port is blocked, multiple parts (such as the hot runner mold body and the manifold) need to be removed, which takes a long time to clean. Therefore, this invention proposes a mold with an improved hot runner structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a mold with improved hot runner structure, including a lower mold and a hot runner mold body. The hot runner mold body is arranged above the lower mold. The hot runner mold body has an inspection structure inside and a connecting structure above it. The inner wall of the hot runner mold body is machined with a cavity. Multiple hot nozzles are fixedly connected to the lower part of the cavity. Multiple flow dividers are fixedly connected to the lower part of the hot nozzles.

[0007] Preferably, a heater is installed on the outer wall of the hot nozzle, and a first elastic sealing ring is installed on the inner wall of the hot runner mold body.

[0008] Preferably, the maintenance structure includes a cover plate, the outer wall of which is inserted into a slot, the slot being machined on the upper part of the inner wall of the hot runner mold body, the lower part of which is pressed against a first elastic sealing ring, and the inner wall of the cover plate being machined with a plurality of first threaded holes, the inner walls of the first threaded holes and the second threaded holes being threadedly connected to bolts.

[0009] Preferably, the second threaded holes are all machined on the inner wall of the hot runner mold body, and the inner wall of the cover plate is fixedly connected to the injection pipe.

[0010] Preferably, the connection structure includes an inclined surface and a conical groove. The inclined surface is machined at the end of the injection pipe, and the conical groove is machined below the inner wall of the external pipe. The inner wall of the conical groove abuts against the rubber plug, and the rubber plug is installed on the outer wall of the injection pipe.

[0011] Preferably, the inner wall of the external pipe is threaded to the injection pipe, and the upper part of the injection pipe is pressed against the second elastic sealing ring.

[0012] Preferably, the second elastic sealing ring is installed on the inner wall of the external pipe.

[0013] The improved hot runner structure mold proposed in this utility model has the following advantages: by cooperating with the external pipe and the connecting structure, the external pipe is sleeved above the injection pipe. When the inclined surface contacts the conical groove, the injection pipe moves towards the center of the conical groove, which can play a guiding role. Then, the external pipe is rotated and tightened on the outside of the injection pipe. When the outer wall of the rubber stopper is pressed against the conical groove, the rotation of the external pipe is stopped. This allows the external pipe and the injection pipe to be quickly aligned without repeated adjustments, facilitating rapid connection.

[0014] By coordinating the hot runner mold body and the maintenance structure, multiple bolts are rotated to unscrew the bolt ends from the second and first threaded holes. Then, the cover plate is pulled out from the slot. This allows the hot nozzle or manifold to be cleaned simply by removing the cover plate without disassembling other parts, and the cleaning work can be carried out in a shorter time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 A partial front sectional view;

[0017] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0018] Figure 4 for Figure 2 Partial top sectional view;

[0019] Figure 5 for Figure 4 A magnified view of part B in the diagram;

[0020] Figure 6 This is a partial cross-sectional view of an external pipe.

[0021] Figure 7 This is a schematic diagram showing the connection between the cover plate and the injection pipe;

[0022] Figure 8 for Figure 2 A partial 3D schematic diagram.

[0023] In the diagram: 1. Lower mold, 2. Hot runner mold body, 3. Maintenance structure, 301. Cover plate, 302. Slot, 303. First threaded hole, 304. Second threaded hole, 4. Cavity, 5. External pipe, 6. Connection structure, 601. Inclined surface, 602. Conical groove, 603. Rubber plug, 7. Hot nozzle, 8. Heater, 9. Diverter pipe, 10. Injection pipe, 11. Second elastic sealing ring, 12. First elastic sealing ring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] See attached document Figure 1-8 In this embodiment, a mold with an improved hot runner structure includes a lower mold 1 and a hot runner mold body 1. A hot runner mold body 2 is provided above the lower mold 1. An inspection structure 3 is provided inside the hot runner mold body 2. A connecting structure 6 is provided above the hot runner mold body 2. A cavity 4 is machined on the inner wall of the hot runner mold body 2. Multiple hot nozzles 7 are fixedly connected below the cavity 4. Multiple flow dividers 9 are fixedly connected below the hot nozzles 7.

[0026] A heater 8 is installed on the outer wall of the hot nozzle 7, a first elastic sealing ring 12 is installed on the inner wall of the hot runner mold body 2, the inner wall of the external pipe 5 is threaded to the injection pipe 10, the upper part of the injection pipe 10 is pressed against the second elastic sealing ring 11, and the second elastic sealing ring 11 is installed on the inner wall of the external pipe 5.

[0027] The maintenance structure 3 includes a cover plate 301. The outer wall of the cover plate 301 is inserted into a slot 302. The slot 302 is machined on the upper part of the inner wall of the hot runner mold body 2. The lower part of the cover plate 301 is pressed against the first elastic sealing ring 12. The inner wall of the cover plate 301 is machined with multiple first threaded holes 303. The inner walls of the first threaded holes 303 and the second threaded holes 304 are all connected to bolt threads. The second threaded holes 304 are all machined on the inner wall of the hot runner mold body 2. The inner wall of the cover plate 301 is fixedly connected to the injection pipe 10.

[0028] The connecting structure 6 includes an inclined surface 601 and a conical groove 602. The inclined surface 601 is machined at the end of the injection pipe 10, and the conical groove 602 is machined below the inner wall of the external pipe 5. The inner wall of the conical groove 602 abuts against the rubber plug 603. The rubber plug 603 is installed on the outer wall of the injection pipe 10. The rubber plug 603, the first elastic sealing ring 12, and the second elastic sealing ring 11 are made of fluororubber, which is resistant to high temperature and has good corrosion resistance.

[0029] When using molds with improved hot runner structures:

[0030] The operator places the external pipe 5 over the injection pipe 10. When the inclined surface 601 contacts the conical groove 602, the injection pipe 10 moves toward the center of the conical groove 602, which can serve as a guide. Then, the external pipe 5 is rotated and tightened on the outside of the injection pipe 10. When the outer wall of the rubber stopper 603 is pressed against the conical groove 602, the rotation of the external pipe 5 is stopped. This allows the external pipe 5 and the injection pipe 10 to be quickly aligned without repeated adjustments, facilitating rapid connection.

[0031] The raw material is fed into the cavity 4 through the injection pipe 10 via the external pipe 5. The external heater 8 is activated. The heater 8 can be connected to an external temperature controller via wires. The temperature controller controls the temperature of the heater 8. When the raw material in the cavity 4 passes through multiple hot nozzles 7, the heater 8 can heat the raw material. Then, it enters the cavity formed by the hot runner mold body 2 and the lower mold 1 through multiple diversion pipes 9. When the cavity is full of raw material, the injection is stopped. After a period of time, the raw material in the cavity cools and solidifies. Then, the mold is opened and the solidified product is taken out.

[0032] When the hot nozzle 7 or the diverter tube 9 is blocked, the operator turns multiple bolts to unscrew the bolt ends from the second threaded hole 304 and the first threaded hole 303. Then, the cover plate 301 is pulled out from the slot 302. The waste in the cavity 4 is then manually scraped off with tools. After that, high-pressure gas is introduced into the hot nozzle 7 to impact the remaining waste and flush it out from the multiple diverter tubes 9. This allows the cleaning of the hot nozzle 7 or the diverter tube 9 to be done by simply removing the cover plate 301 without disassembling other parts, and the cleaning work can be started in a short time.

[0033] After cleaning, the operator inserts the cover plate 301 into the slot 302, and then screws the bolts into the multiple first threaded holes 303 and the second threaded holes 304 for easy use next time.

[0034] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A mold with an improved hot runner structure, comprising a lower mold (1) and a hot runner mold body (2), wherein the hot runner mold body (2) is disposed above the lower mold (1), characterized in that: The hot runner mold body (2) has an inspection structure (3) inside, a connection structure (6) is provided above the hot runner mold body (2), a cavity (4) is machined on the inner wall of the hot runner mold body (2), a plurality of hot nozzles (7) are fixedly connected below the cavity (4), and a plurality of branch pipes (9) are fixedly connected below the hot nozzles (7).

2. The mold with improved hot runner structure according to claim 1, characterized in that: A heater (8) is installed on the outer wall of the hot nozzle (7), and a first elastic sealing ring (12) is installed on the inner wall of the hot runner mold body (2).

3. The mold with improved hot runner structure according to claim 1, characterized in that: The maintenance structure (3) includes a cover plate (301), the outer wall of the cover plate (301) is inserted into a slot (302), the slot (302) is machined on the upper part of the inner wall of the hot runner mold body (2), the lower part of the cover plate (301) is abutted against the first elastic sealing ring (12), the inner wall of the cover plate (301) is machined with a plurality of first threaded holes (303), and the inner walls of the first threaded holes (303) and the second threaded holes (304) are threaded with bolts.

4. The mold with improved hot runner structure according to claim 3, characterized in that: The second threaded hole (304) is machined on the inner wall of the hot runner mold body (2), and the inner wall of the cover plate (301) is fixedly connected to the injection pipe (10).

5. The mold with improved hot runner structure according to claim 1, characterized in that: The connecting structure (6) includes an inclined surface (601) and a conical groove (602). The inclined surface (601) is machined at the end of the injection pipe (10), and the conical groove (602) is machined below the inner wall of the external pipe (5). The inner wall of the conical groove (602) abuts against the rubber plug (603), and the rubber plug (603) is installed on the outer wall of the injection pipe (10).

6. The mold with improved hot runner structure according to claim 5, characterized in that: The inner wall of the external pipe (5) is threaded to the injection pipe (10), and the upper part of the injection pipe (10) is pressed against the second elastic sealing ring (11).

7. The mold with improved hot runner structure according to claim 6, characterized in that: The second elastic sealing ring (11) is installed on the inner wall of the external pipe (5).

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