Hot runner structure in pen-making injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a hot runner structure in a pen-making injection mold, which comprises a hot runner main body, a first fixing plate is arranged on one side of the hot runner main body, and a front mold is mounted on one side of the first fixing plate; a rear mold is arranged on one side of the front mold, a second fixing plate is arranged on one side of the rear mold, and a pen shell forming cavity is formed in the rear mold; a prompting assembly is arranged on one side of the first fixing plate, and a filtering assembly is arranged on one side of the prompting assembly; when plastic particles in a molten state pass through a filter screen, impurities in the plastic particles in the molten state are blocked on one side by the filter screen, and the situation that the impurities enter the inner side of the hot runner main body to block a discharging port of the hot runner main body is avoided; when the filter screen is blocked, the second conveying pipe and the feeding frame leave the inner sides of the first limiting groove and the second limiting groove, at the moment, the fixing frame and the filter screen can be taken out to be replaced, and the filter screen can be rapidly, simply and conveniently replaced when blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a hot runner structure in a pen-making injection mold. Background Art

[0002] A hot runner is a heated component system used in injection molds to inject molten plastic particles into the mold cavity. A hot runner mold is a novel structure that heats the sprue and runners of a traditional or three-plate mold, eliminating the need to remove the runners and sprue during each molding cycle.

[0003] Traditional hot runners often have problems such as impurities in plastic particles easily clogging the discharge port and the filter screen is difficult and time-consuming to replace. This not only increases production downtime, but may also cause defects in injection molded parts, affecting product quality. To this end, a hot runner structure for a pen injection mold is proposed. Utility Model Content

[0004] The purpose of the present utility model is to provide a hot runner structure in a pen-making injection mold to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a hot runner structure in a pen-making injection mold, comprising a hot runner body, a first fixing plate being provided on one side of the hot runner body, and a front mold being installed on one side of the first fixing plate;

[0006] A rear mold is provided on one side of the front mold, a second fixing plate is provided on one side of the rear mold, and a pen shell molding cavity is provided inside the rear mold;

[0007] A prompt component is provided on one side of the first fixing plate, and a filter component is provided on one side of the prompt component;

[0008] The filtering assembly includes a feed rack, a plurality of pull rods are fixed on the outside of the feed rack, a second feed pipe is connected to one side of the feed rack, an annular plate is fixed on the outside of the second feed pipe, the first feed pipe is threadedly connected to the outside of the second feed pipe, and a filter is provided between the first feed pipe and the second feed pipe.

[0009] Preferably, a first limiting groove is provided on one side of the above-mentioned first fixed plate, a second limiting groove is provided on the inner wall of the first limiting groove, the discharge end of the first delivery pipe is connected to the feed end of the hot runner body, and delivery grooves are provided inside the feed rack, the first delivery pipe and the second delivery pipe.

[0010] Preferably, a fixing frame is fixed to the outside of the above-mentioned filter screen, and sealing rings are bonded to the inner walls of the first feed pipe and the second feed pipe on both sides. The outer side of the first feed pipe is fixed to the inner wall of the second limiting groove, and the outer side of the feed frame is slidably connected to the inner wall of the first limiting groove.

[0011] Preferably, the prompt component includes a limit frame, a slide groove is provided inside the limit frame, a slide plate is slidably connected to the inside of the slide groove, and a slide column that movably passes through one side of the limit frame is fixed to one side of the slide plate.

[0012] Preferably, a switch is fixed to the bottom of the inner wall of the above-mentioned slide groove, and a tension spring is sleeved on the outer side of the slide column, and the two ends of the tension spring are respectively connected to the slide plate and one side of the slide groove.

[0013] Preferably, an indicator light is installed on one side of the front mold, and the output end of the switch is electrically connected to the input end of the indicator light.

[0014] Preferably, the bottom of the limiting frame is fixed to the inner wall of the second limiting groove.

[0015] Compared with the prior art, the above technical solution adopted by the present invention has the following technical effects:

[0016] 1. When the molten plastic particles pass through the filter, the filter blocks the impurities inside the molten plastic particles on one side, preventing the impurities from entering the inside of the hot runner body and causing blockage of its discharge port.

[0017] 2. The feed rack and the second feed pipe are rotated by rotating the pull rod, so that the second feed pipe and the feed rack leave the first limit groove and the inner side of the second limit groove. At this time, the fixing rack and the filter can be taken out for replacement. The new filter and the fixing rack are placed at one end of the first feed pipe, so that the second feed pipe is threadedly connected to the first feed pipe. When the sealing ring is respectively fitted with the first feed pipe and the second feed pipe, the filter is replaced. When the filter is clogged, it can be replaced quickly and easily without stopping the machine to disassemble the entire injection mold, thereby greatly reducing maintenance time and downtime costs and improving the overall efficiency of the injection mold.

[0018] 3. The annular plate follows the rotation. At this time, the annular plate will press the sliding column downward, and the sliding column will push the slide plate to slide inside the slide groove, and the slide plate will stretch the tension spring. When the second feed pipe is tightened downward with the first feed pipe, the switch is triggered. The triggering of the switch serves as a reliable indication of the connection completion, which improves the accuracy and reliability of the connection. The staff does not need to rely on experience and feeling to judge whether the two feed pipes are tightly connected. The light prompt of the indicator light can make an intuitive judgment. The instant feedback mechanism greatly simplifies the operation process and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic structural diagram of the utility model from a first perspective;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective;

[0022] Figure 3 This is a schematic diagram of the front mold's main cross-sectional structure of the present invention;

[0023] Figure 4 This is a structural diagram of the material feeding trough of the present utility model;

[0024] Figure 5 This is a structural diagram of the filter screen of the present invention;

[0025] Figure 6 This is a schematic diagram of the main cross-sectional structure of the limit frame of the present utility model.

[0026] Explanation of the accompanying drawings: 1. Hot runner body; 2. Front mold; 3. First fixed plate; 4. Rear mold; 5. Second fixed plate; 6. Pen shell molding cavity; 7. Prompt assembly; 71. Indicator light; 72. Limiting frame; 73. Tension spring; 74. Switch; 75. Slide plate; 76. Slide column; 77. Slide groove; 8. Filter assembly; 81. Feed rack; 82. Pull rod; 83. First limiting groove; 84. Second limiting groove; 85. Annular plate; 86. First delivery pipe; 87. Delivery trough; 88. Second delivery pipe; 89. Filter screen; 810. Sealing ring; 811. Fixed frame. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0029] Example

[0030] See also Figure 1-6 The utility model provides a technical solution: a hot runner structure in a pen injection mold, comprising a hot runner body 1, a first fixing plate 3 being provided on one side of the hot runner body 1, a front mold 2 being installed on one side of the first fixing plate 3, the hot runner body 1 being installed inside the front mold 2, a rear mold 4 being provided on one side of the front mold 2, a second fixing plate 5 being provided on one side of the rear mold 4, a pen shell molding cavity 6 being provided inside the rear mold 4, the hot runner body 1 being located on one side of the pen shell molding cavity 6, the flowing plastic entering the inner side of the pen shell molding cavity 6, and completing the injection molding of the pen shell;

[0031] A prompt component 7 is provided on one side of the first fixing plate 3. The power supply of the prompt component 7 is connected to the external municipal power supply. A filter component 8 is provided on one side of the prompt component 7.

[0032] In order to facilitate the filtering of the molten plastic particles, a filtering assembly 8 is provided, which includes a feed rack 81. The feed rack 81 cooperates with the discharge end of the injection molding machine so that the molten plastic particles of the injection molding machine enter the inner side of the feed rack 81. Several pull rods 82 are fixed to the outside of the feed rack 81. One side of the feed rack 81 is connected to a second delivery pipe 88. An annular plate 85 is fixed to the outside of the second delivery pipe 88. The outside of the second delivery pipe 88 is threadedly connected to the first delivery pipe 86. The first delivery pipe 86 and the second delivery pipe 88 are connected to each other. 8 is provided between the filter screen 89. When the molten plastic particles pass through the filter screen 89, the filter screen 89 blocks the impurities inside the molten plastic particles on one side to prevent the impurities from entering the inner side of the hot runner body 1 and causing its discharge port to be blocked. A first limiting groove 83 is provided on one side of the first fixed plate 3, and a second limiting groove 84 is provided on the inner wall of the first limiting groove 83. The discharge end of the first delivery pipe 86 is connected to the feed end of the hot runner body 1, and a delivery groove 87 is provided inside the feed rack 81, the first delivery pipe 86 and the second delivery pipe 88.

[0033] A fixing frame 811 is fixed to the outside of the filter screen 89, and sealing rings 810 are bonded to the inner walls of the first feed pipe 86 and the second feed pipe 88 on both sides. The outer side of the first feed pipe 86 is fixed to the inner wall of the second limiting groove 84, and the outer side of the feed frame 81 is slidably connected to the inner wall of the first limiting groove 83. When the filter screen 89 is blocked, it can be replaced quickly and easily without stopping the machine to disassemble the entire injection mold, thereby greatly reducing maintenance time and downtime costs, and improving the overall efficiency of the injection mold.

[0034] When the lever 82 is turned, the annular plate 85 is rotated accordingly, and the annular plate 85 will press the slide post 76 downward. At this time, the slide post 76 pushes the slide plate 75 to slide inside the slide slot 77. A switch 74 is fixed to the bottom of the inner wall of the slide slot 77, and a tension spring 73 is sleeved on the outer side of the slide post 76. The two ends of the tension spring 73 are respectively connected to the slide On one side of the plate 75 and the slide 77, an indicator light 71 is installed on one side of the front mold 2, and the output end of the switch 74 is electrically connected to the input end of the indicator light 71. The slide plate 75 stretches the tension spring 73, and when the second feed pipe 88 is tightened downward with the first feed pipe 86, the switch 74 is triggered. When the switch 74 is triggered, the indicator light 71 produces a light prompt, and the bottom of the limit frame 72 is fixed to the inner wall of the second limit groove 84, actively informing the staff that the first feed pipe 86 and the second feed pipe 88 are now connected together. When the first feed pipe 86 and the second feed pipe 88 are not connected to the bottom, the indicator light 71 will not light up.

[0035] Working principle: When the pen shell needs to be injection molded, the first fixing plate 3 and the second fixing plate 5 are first connected to the workbench of the injection molding machine respectively. Then the injection molding machine injects the molten plastic particles into the inner side of the feed trough 87 of the feed rack 81. Under the guiding action of the feed trough 87, the molten plastic particles pass through the second feed pipe 88, the first feed pipe 86 and the hot runner body 1 and enter the inner side of the pen shell molding cavity 6. At this time, the rear mold 4 cools the molten plastic particles, and the pen shell injection molding is completed.

[0036] When the molten plastic particles pass through the filter 89, the filter 89 blocks the impurities inside the molten plastic particles on one side, preventing the impurities from entering the inner side of the hot runner body 1 and causing the discharge port thereof to be blocked. When the filter 89 is blocked, it is only necessary to rotate the pull rod 82 clockwise to drive the feed rack 81 and the second delivery pipe 88 to rotate, so that the second delivery pipe 88 is disconnected from the threaded connection with the first delivery pipe 86, so that the second delivery pipe 88 and the feed rack 81 leave the inner sides of the first limiting groove 83 and the second limiting groove 84. At this time, the fixing frame 811 and the filter 89 can be taken out for replacement;

[0037] Place the new filter 89 and the fixing bracket 811 at one end of the first delivery pipe 86, then rotate the pull rod 82 counterclockwise to thread the second delivery pipe 88 into the first delivery pipe 86. When the sealing ring 810 fits the first delivery pipe 86 and the second delivery pipe 88 respectively, the replacement of the filter 89 is completed.

[0038] When the pull rod 82 is rotated, the annular plate 85 will rotate accordingly. At this time, the annular plate 85 will press the sliding post 76 downward. At this time, the sliding post 76 pushes the slide plate 75 to slide inside the slide groove 77, and the slide plate 75 stretches the tension spring 73. When the second delivery pipe 88 is tightened downward with the first delivery pipe 86, the switch 74 is triggered. When the switch 74 is triggered, the indicator light 71 produces a light prompt, actively informing the staff that the first delivery pipe 86 and the second delivery pipe 88 are now connected together. When the first delivery pipe 86 and the second delivery pipe 88 are not connected to the bottom, the indicator light 71 will not light up. If the two delivery pipes are not connected to the bottom or the connection is not tight, it may cause problems such as leakage of molten plastic or entry of impurities. Through the prompt of the indicator light 71, improper connection can be discovered and corrected in time, thereby reducing operational risks and ensuring production safety.

[0039] In summary, effective filtration by the filter 89 can prevent impurities from entering the hot runner body 1, avoiding problems such as discharge port blockage and product defects caused by impurities, ensuring the purity and consistency of plastic products, and improving product quality. When the filter 89 is blocked, it can be replaced quickly and easily without stopping the entire injection mold to disassemble, thereby greatly reducing maintenance time and downtime costs and improving the overall efficiency of the injection mold.

[0040] Through the mechanical linkage of the sliding column 76, the sliding plate 75 and the sliding groove 77, combined with the elastic force of the tension spring 73, it is ensured that when the pull rod 82 is rotated to connect the second material delivery pipe 88 with the first material delivery pipe 86, the predetermined tightness can be achieved. The triggering of the switch 74 serves as a reliable indication of the completion of the connection, thereby improving the accuracy and reliability of the connection. The staff does not need to rely on experience and feeling to judge whether the two material delivery pipes are tightly connected, but can make an intuitive judgment through the light prompt of the indicator light 71. The instant feedback mechanism greatly simplifies the operation process and improves work efficiency.

[0041] Those skilled in the art will appreciate that various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A hot runner structure in a pen-making injection mold, comprising a hot runner body (1), characterized in that: A first fixing plate (3) is provided on one side of the hot runner body (1), and a front mold (2) is installed on one side of the first fixing plate (3); A rear mold (4) is provided on one side of the front mold (2), a second fixing plate (5) is provided on one side of the rear mold (4), and a pen shell molding cavity (6) is provided inside the rear mold (4); A prompt component (7) is provided on one side of the first fixing plate (3), and a filter component (8) is provided on one side of the prompt component (7); The filter assembly (8) includes a feed rack (81), a plurality of pull rods (82) are fixed on the outside of the feed rack (81), a second feed pipe (88) is connected to one side of the feed rack (81), an annular plate (85) is fixed on the outside of the second feed pipe (88), the outside of the second feed pipe (88) is threadedly connected to the first feed pipe (86), and a filter screen (89) is provided between the first feed pipe (86) and the second feed pipe (88).

2. The hot runner structure in a pen-making injection mold according to claim 1, characterized in that: A first limiting groove (83) is provided on one side of the first fixing plate (3), a second limiting groove (84) is provided on the inner wall of the first limiting groove (83), the discharge end of the first delivery pipe (86) is connected to the feed end of the hot runner body (1), and a delivery groove (87) is provided inside the feed rack (81), the first delivery pipe (86), and the second delivery pipe (88).

3. The hot runner structure in a pen-making injection mold according to claim 2, characterized in that: A fixing frame (811) is fixed on the outside of the filter screen (89), and sealing rings (810) are bonded to both sides of the fixing frame (811) and are attached to the inner walls of the first feed pipe (86) and the second feed pipe (88). The outer side of the first feed pipe (86) is fixed to the inner side wall of the second limiting groove (84), and the outer side of the feed frame (81) is slidably connected to the inner side wall of the first limiting groove (83).

4. The hot runner structure in a pen-making injection mold according to claim 3, characterized in that: The prompt component (7) includes a limit frame (72), a slide groove (77) is provided inside the limit frame (72), a slide plate (75) is slidably connected inside the slide groove (77), and a slide column (76) that movably passes through one side of the limit frame (72) is fixed on one side of the slide plate (75).

5. The hot runner structure in a pen-making injection mold according to claim 4, characterized in that: A switch (74) is fixed to the bottom of the inner wall of the slide groove (77), and a tension spring (73) is sleeved on the outer side of the slide column (76). The two ends of the tension spring (73) are respectively connected to one side of the slide plate (75) and the slide groove (77).

6. The hot runner structure in a pen-making injection mold according to claim 5, characterized in that: An indicator light (71) is installed on one side of the front mold (2), and the output end of the switch (74) is electrically connected to the input end of the indicator light (71).

7. The hot runner structure in a pen-making injection mold according to claim 6, characterized in that: The bottom of the limiting frame (72) is fixed to the inner side wall of the second limiting groove (84).

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