Injection mold capable of quickly replacing sprue bush

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold capable of quickly replacing a sprue bush, which comprises a lower fixing plate, the top of the lower fixing plate is connected with a male mold, the top of the male mold is connected with a female mold, and the top of the female mold is connected with an upper fixing plate. A positioning ring is fixedly connected to the center of the top of the upper fixing plate, a sprue bush is movably clamped in the positioning ring, and a plug pin is movably inserted between the positioning ring and the outer surface of the sprue bush. According to the utility model, through the positioning ring, the sprue bush, the plug pin and the mounting assembly, the clamping pieces on the two sides of the sprue bush are inserted into the clamping grooves, the telescopic clamping pins on the clamping pieces are clamped into the lock holes through rotation, and meanwhile, the plug pin is movably inserted into the positioning ring and the outer surface of the sprue bush, so that the clamping of the sprue bush is reinforced, and the quick assembly of the sprue bush is realized; and the sprue bush can be quickly replaced after being damaged, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with a quick-change sprue bushing. Background Technology

[0002] Injection molds are used to form the shape of the final product. They typically consist of two parts: a moving mold and a fixed mold. During the injection process, molten plastic is poured into the mold and, after cooling, forms the desired plastic product.

[0003] Injection molds include a lower fixed plate, male mold, female mold, upper fixed plate, positioning ring, and sprue bushing. The injection tube is precisely aligned with the sprue bushing of the mold to ensure that the molten plastic can smoothly enter the mold cavity. The sprue bushing is usually assembled and fixed using bolts.

[0004] While existing injection molds allow for the replacement of sprue bushings, the disassembly and assembly process is time-consuming and prone to inaccurate positioning, thus affecting production efficiency and making them inconvenient to use. Therefore, an injection mold with a quick-change sprue bushing is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an injection mold for quick replacement of the sprue bushing, aiming to solve the problems in the prior art where disassembly and assembly are time-consuming and prone to inaccurate positioning when replacing the sprue bushing, thus affecting production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold for quick replacement of sprue bushings, comprising a lower fixed plate, a male mold connected to the top of the lower fixed plate, a female mold connected to the top of the male mold, an upper fixed plate connected to the top of the female mold, a positioning ring fixedly connected at the top center of the upper fixed plate, a sprue bushing movably engaged inside the positioning ring, a pin movably inserted between the positioning ring and the outer surface of the sprue bushing, a sealing assembly provided between the positioning ring and the upper surface of the sprue bushing, the sealing assembly comprising a sealing cap, magnetic blocks fixedly connected to the bottom of the sealing cap and the top of the positioning ring, and an installation assembly provided between the positioning ring and the sprue bushing.

[0007] As a further description of the above technical solution:

[0008] A steering ball is fixedly connected to one side of the bottom of the sealing cap, and a fixed seat is movably connected to the outer periphery of the steering ball. The bottom of the fixed seat is fixedly connected to the top side of the positioning ring.

[0009] As a further description of the above technical solution:

[0010] The mounting assembly includes a snap-fit ​​groove and a clip. There are two snap-fit ​​grooves, which are mirror images of each other along the central axis of the positioning ring. The two snap-fit ​​grooves are formed on the inner wall of the positioning ring. One side of the upper edge of the inner wall of the two snap-fit ​​grooves passes through the upper surface of the positioning ring and has a snap-fit ​​groove. The other side of the upper edge of the inner wall of the two snap-fit ​​grooves passes through the upper surface of the positioning ring and has a locking hole.

[0011] As a further description of the above technical solution:

[0012] There are two clamps in total. The two clamps are mirror images of each other along the central axis of the sprue sleeve. One end of each clamp is fixedly connected to the outer wall of the sprue sleeve, and the other end of each clamp is movably engaged in the inside of the engagement groove. Telescopic pins are fixedly connected to the outer edges of the upper surfaces of the two clamps.

[0013] As a further description of the above technical solution:

[0014] The end of the telescopic latch is telescopically engaged with the inside of the lock hole, and the outer wall of the telescopic end of the telescopic latch is adapted to the inner wall size of the lock hole.

[0015] As a further description of the above technical solution:

[0016] The outer surface of the positioning ring is provided with a mounting slot for a pin of the appropriate size.

[0017] As a further description of the above technical solution:

[0018] The outer surface of the sprue bushing is provided with a slot for a sized fitting pin.

[0019] As a further description of the above technical solution:

[0020] The magnetic blocks are provided in two sets. One set of magnetic blocks is mirrored along the central axis of the sealing cap, and the other set of magnetic blocks is mirrored along the central axis of the positioning ring. The two sets of magnetic blocks are arranged with opposite magnetic poles.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a positioning ring, a sprue sleeve, a pin, and an installation component are used. The clips on both sides of the sprue sleeve are inserted into the snap-fit ​​grooves, and the telescopic pins on the clips are engaged in the locking holes by rotation. At the same time, the positioning ring is movably inserted into the pin on the outer surface of the sprue sleeve to strengthen the snap-fit ​​of the sprue sleeve, thereby realizing the quick assembly of the sprue sleeve. The reverse operation can be used to complete the disassembly, which is convenient for quick replacement after the sprue sleeve is damaged. The operation is simple.

[0023] 2. In this utility model, the sealing cover installed by the steering ball head can be rotated and adjusted by means of the sealing component and magnetic block. When the injection mold is not in use, the sealing cover and the magnetic block on the positioning ring can effectively protect the sprue sleeve from dust. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of an injection mold for quick-change of sprue bushing according to the present invention.

[0025] Figure 2 This is a schematic diagram of the opening structure of the sealing component of an injection mold for quick-change of the sprue bushing, as proposed in this utility model.

[0026] Figure 3 This utility model provides a disassembled structural diagram of the positioning ring, sprue sleeve, pin, and mounting components of an injection mold for quick-change sprue sleeve.

[0027] Figure 4 This is a schematic diagram of the disassembled structure of the installation components of an injection mold for quick-change of the sprue bushing, as proposed in this utility model.

[0028] Legend:

[0029] 1. Lower fixing plate; 2. Male mold; 3. Female mold; 4. Upper fixing plate; 5. Positioning ring; 6. Sprue sleeve; 7. Pin; 8. Sealing assembly; 81. Fixing base; 82. Steering ball head; 83. Sealing cover; 9. Mounting assembly; 91. Snap-fit ​​groove; 92. Clip; 93. Locking hole; 94. Telescopic pin; 10. Magnetic block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 and Figure 4This utility model provides an embodiment of an injection mold for quick-change of sprue bushings, comprising a lower fixed plate 1, a male mold 2 connected to the top of the lower fixed plate 1, a female mold 3 connected to the top of the male mold 2 for injection molding, an upper fixed plate 4 connected to the top of the female mold 3, a positioning ring 5 fixedly connected to the center of the top of the upper fixed plate 4 by bolts, a sealing assembly 8 provided between the positioning ring 5 and the upper surface of the sprue bushing 6 for dust protection of the sprue bushing 6 when the injection mold is not in use, the sealing assembly 8 including a sealing cap 83, a flexibly rotatable steering ball head 82 fixedly connected to one side of the bottom of the sealing cap 83, and the outer periphery of the steering ball head 82 movably connected to... A fixed base 81 is provided, and the bottom of the fixed base 81 is fixedly connected to the top side of the positioning ring 5. The bottom of the sealing cover 83 and the top of the positioning ring 5 are both fixedly connected to magnetic blocks 10 for magnetic fixation. There are two sets of magnetic blocks 10. One set of magnetic blocks 10 is mirrored along the central axis of the sealing cover 83, and the other set of magnetic blocks 10 is mirrored along the central axis of the positioning ring 5. The two sets of magnetic blocks 10 are set with opposite magnetic poles. Through the sealing assembly 8 and the magnetic blocks 10, the sealing cover 83 installed by the steering ball head 82 can be rotated and adjusted. When the injection mold is not in use, the sealing cover 83 and the magnetic blocks 10 on the positioning ring 5 can effectively protect the sprue sleeve 6 from dust.

[0032] Reference Figure 2 and Figure 3The positioning ring 5 has a movable, quickly replaceable sprue sleeve 6 inside. The outer surface of the positioning ring 5 has a slot for a sized fitting pin 7, and the outer surface of the sprue sleeve 6 has a groove for a sized fitting pin 7. A pin 7 is movably inserted between the outer surfaces of the positioning ring 5 and the sprue sleeve 6 to reinforce the engagement of the sprue sleeve 6. An easily detachable mounting assembly 9 is provided between the positioning ring 5 and the sprue sleeve 6. The mounting assembly 9 includes two engaging grooves 91 and two locking pieces 92. The two engaging grooves 91 are mirror images of the central axis of the positioning ring 5 and are located on the inner wall of the positioning ring 5. One side of the upper edge of the inner wall of the two engaging grooves 91 penetrates the upper surface of the positioning ring 5 and has a fitting groove. The other side of the upper edge of the inner wall of the two engaging grooves 91 penetrates the upper surface of the positioning ring 5 and has a locking hole 93. The two locking pieces 92 are located along... The central axis of the sprue sleeve 6 is mirrored. One end of each of the two clips 92 is fixedly connected to the outer wall of the sprue sleeve 6, and the other end of each clip 92 is movably engaged in the interior of the engagement groove 91. A telescopic pin 94 is fixedly connected to the outer edge of the upper surface of each clip 92. The end of the telescopic pin 94 is telescopically engaged in the interior of the locking hole 93, and the outer wall of the telescopic end of the telescopic pin 94 is adapted to the inner wall size of the locking hole 93. The clips 92 on both sides of the sprue sleeve 6 are engaged in the engagement groove 91 through the clip slots, and the telescopic pin 94 on the clips 92 is engaged in the locking hole 93 by rotation. A pin 7 is movably inserted between the positioning ring 5 and the outer surface of the sprue sleeve 6 to reinforce the engagement of the sprue sleeve 6. The sprue sleeve 6 can be quickly assembled by this method, and disassembly can be completed by the reverse operation. The operation is simple and easy to quickly replace the sprue sleeve 6 after it is damaged.

[0033] Working principle: During use, the clips 92 on both sides of the sprue sleeve 6 are inserted into the locking grooves 91, and the telescopic pins 94 on the clips 92 are engaged into the locking holes 93 by rotation. At the same time, the pins 7 are movably inserted between the positioning ring 5 and the outer surface of the sprue sleeve 6 to strengthen the locking of the sprue sleeve 6, thereby realizing the quick assembly of the sprue sleeve 6. The reverse operation can complete the disassembly. The operation is simple and convenient for quick replacement after the sprue sleeve 6 is damaged. When the injection mold is not in use, the sealing cover 83 installed by the steering ball head 82 can be rotated and adjusted. The sealing cover 83 cooperates with the magnetic block 10 on the positioning ring 5 to effectively prevent dust accumulation on the sprue sleeve 6.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An injection mold for quick-change of sprue bushing, comprising a lower fixing plate (1), characterized in that: The top of the lower fixing plate (1) is connected to a male mold (2), the top of the male mold (2) is connected to a female mold (3), the top of the female mold (3) is connected to an upper fixing plate (4), a positioning ring (5) is fixedly connected at the top center of the upper fixing plate (4), a sprue sleeve (6) is movably engaged inside the positioning ring (5), a pin (7) is movably inserted between the positioning ring (5) and the outer surface of the sprue sleeve (6), a sealing assembly (8) is provided between the positioning ring (5) and the upper surface of the sprue sleeve (6), the sealing assembly (8) includes a sealing cap (83), a magnetic block (10) is fixedly connected to the bottom of the sealing cap (83) and the top of the positioning ring (5), and an installation assembly (9) is provided between the positioning ring (5) and the sprue sleeve (6).

2. The injection mold for quick-change sprue bushing according to claim 1, characterized in that: A steering ball head (82) is fixedly connected to one side of the bottom of the sealing cap (83), and a fixed seat (81) is movably connected to the outer periphery of the steering ball head (82). The bottom of the fixed seat (81) is fixedly connected to one side of the top of the positioning ring (5).

3. The injection mold for quick-change sprue bushing according to claim 1, characterized in that: The mounting component (9) includes a snap-fit ​​groove (91) and a clip (92). There are two snap-fit ​​grooves (91). The two snap-fit ​​grooves (91) are mirror images of the central axis of the positioning ring (5). The two snap-fit ​​grooves (91) are opened on the inner wall of the positioning ring (5). One side of the upper edge of the inner wall of the two snap-fit ​​grooves (91) passes through the upper surface of the positioning ring (5) and is provided with a snap-fit ​​groove. The other side of the upper edge of the inner wall of the two snap-fit ​​grooves (91) passes through the upper surface of the positioning ring (5) and is provided with a locking hole (93).

4. The injection mold for quick-change sprue bushing according to claim 3, characterized in that: Two clips (92) are provided. The two clips (92) are mirror images of the central axis of the sprue sleeve (6). One end of the two clips (92) is fixedly connected to the outer wall of the sprue sleeve (6), and the other end of the two clips (92) is movably engaged in the interior of the engagement groove (91). Telescopic pins (94) are fixedly connected to the outer edge of the upper surface of the two clips (92).

5. The injection mold for quick-change sprue bushing according to claim 4, characterized in that: The end of the telescopic latch (94) is telescopically engaged with the inside of the lock hole (93), and the outer wall of the telescopic end of the telescopic latch (94) is adapted to the inner wall size of the lock hole (93).

6. The injection mold for quick-change of sprue bushing according to claim 1, characterized in that: The outer surface of the positioning ring (5) is provided with a mounting slot for the size-adaptive pin (7) to be mounted.

7. The injection mold for quick-change sprue bushing according to claim 1, characterized in that: The outer surface of the sprue sleeve (6) is provided with a slot for the size-adapted pin (7) to be inserted.

8. The injection mold for quick-change sprue bushing according to claim 1, characterized in that: The magnetic blocks (10) are provided in two sets. One set of magnetic blocks (10) is mirrored along the central axis of the sealing cap (83), and the other set of magnetic blocks (10) is mirrored along the central axis of the positioning ring (5). The two sets of magnetic blocks (10) are set with opposite magnetic poles.

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