In-mold water gap cutting device for plastic part forming mold

Abstract

The utility model relates to the technical field of injection mold auxiliary devices, in particular to an in-mold water gap cutting device for a plastic part forming mold. The in-mold water gap cutting device for the plastic part forming mold comprises an installation frame which is an installation carrier of parts, and a square opening is formed in the lower side face of the installation frame. The four guide rods are distributed in a rectangular shape and transversely connected to the inner side face of the mounting frame; and the first mold is slidably connected among the four guide rods, and sliding grooves are formed in the left side and the right side of the right side face of the first mold in an up-down symmetrical mode. The air cylinder is started to drive the cutter to move to cut the water gap, the buffer cushion absorbs impact force generated in the cutting process, the mold and the cutter are protected against damage, the water gap and a plastic part are affected by the back of the cutter and the ejection equipment respectively to achieve automatic demolding, and the water gap and the plastic part are moved to the conveying assembly under the action of gravity. The motor is started to drive the conveying assembly to convey the water openings and the plastic parts to achieve collection.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for injection molds, and in particular to an in-mold gate cutting device for plastic part molding molds. Background Technology

[0002] Plastic molding molds, or simply plastic molds, are important tools used to produce plastic products. They mainly consist of two parts: a moving mold and a fixed mold. The moving mold is installed on the moving platen of the injection molding machine, while the fixed mold is installed on the fixed platen of the injection molding machine. The in-mold gate cutting device can automatically complete the gate cutting work inside the mold, thereby improving production efficiency, reducing production costs, improving product quality and stability, and adapting to diversified production needs.

[0003] Current molds lack the function of automatically cutting sprues, which means that sprues need to be manually cut in subsequent processes. This requires a lot of manpower, increases the company's labor costs, and takes more time to complete the cutting task. This may lead to a longer production cycle and make it impossible to meet the needs of mass production or urgent orders.

[0004] In conclusion, there is an urgent need for an in-mold gate cutting device for plastic part molding dies to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of current molds that lack automatic gate cutting function, this utility model provides an in-mold gate cutting device for plastic part molding molds.

[0006] An in-mold gate cutting device for a plastic part molding die includes a mounting frame as a mounting carrier for the part, the mounting frame having a square opening on its lower side; four guide rods arranged in a rectangular pattern and horizontally connected to the inner side of the mounting frame; a first mold slidably connected between the four guide rods, the first mold having symmetrically arranged grooves on both sides of its right side; an injection tube symmetrically connected to the front side of the first mold; a second mold slidably connected between the four guide rods, the second mold being located to the right of the first mold; cylinders mounted on the front and rear sides of the first mold; a cutter connected to the opposing ends of the telescopic rods of the two cylinders, the cutter being able to slide within a groove on the first mold; and buffer pads symmetrically connected to the first mold, both buffer pads being located between the two cutters.

[0007] As an improvement to the above solution, it also includes a fixed frame connected to the lower side of the mounting frame; elastic elements evenly spaced and connected to the fixed frame; a guide plate connected between the top ends of the elastic elements, the guide plate being located between the mounting frame and the fixed frame; a motor mounted on the fixed frame; and a conveying assembly mounted on the fixed frame, the front end of the output shaft of the motor being connected to the conveying assembly via a coupling, the conveying assembly being located on the right side of the elastic elements.

[0008] As an improvement to the above solution, a support plate is also included, which is connected to the lower side of the mounting bracket and is located on the left side of the fixing bracket.

[0009] As an improvement to the above solution, a rubber plate is also included, which is connected to the upper side of the guide plate, with a square opening located above the rubber plate.

[0010] As an improvement to the above solution, the cutter is U-shaped, and the edge of the inner circle of the cutter facing each other is set as the back of the blade, and the edge facing away from the blade is set as the edge of the blade.

[0011] As an improvement to the above solution, the support plate has hexagonal grooves.

[0012] This utility model has the following advantages:

[0013] This invention uses a cylinder to drive a cutter to move and cut the sprue. A buffer pad absorbs the impact force generated during the cutting process, protecting the mold and cutter from damage. The sprue and plastic parts are automatically demolded by the back of the cutter and the ejection device, respectively. Under the action of gravity, they are moved to the conveying assembly. The motor is started to drive the conveying assembly to transport the sprue and plastic parts for collection. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the mounting bracket, guide rod, and injection tube of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the cylinder, cutter, and buffer pad of this utility model.

[0017] Figure 4 This is a cross-sectional view of the guide plate, rubber plate, and elastic components of this utility model.

[0018] Wherein: 1: mounting bracket, 2: guide rod, 3: first mold, 301: injection tube, 4: second mold, 5: cylinder, 6: cutter, 7: buffer pad, 8: fixing bracket, 9: square opening, 10: guide plate, 11: rubber plate, 12: elastic element, 13: motor, 14: conveying assembly, 15: support plate. Detailed Implementation

[0019] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0020] Example: An in-mold gate cutting device for a plastic part molding die, such as... Figure 1-4 As shown, the assembly includes a mounting frame 1, guide rods 2, a first mold 3, an injection tube 301, a second mold 4, a cylinder 5, a cutter 6, and a buffer pad 7. The mounting frame 1 serves as the mounting carrier for the parts. A square opening is formed on the lower side of the mounting frame. Four guide rods 2 are horizontally welded to the inner side of the mounting frame 1, arranged in a rectangular pattern. The first mold 3 is slidably connected between the four guide rods 2. The right side of the first mold 3 has symmetrically arranged grooves on both sides. The injection tube 301 is symmetrically connected to the lower front side of the upper first mold 3. The second mold 4 is slidably connected between the four guide rods 2 and is located to the right of the first mold 3. Cylinders 5 are installed on both sides of the rear. The ends of the telescopic rods of the two cylinders 5 facing each other are connected to cutters 6. The cutters 6 can slide in the groove on the first mold 3. The cutters 6 are U-shaped, and the edge of the inner circle of the cutter 6 facing each other is set as the back of the blade, and the edge of the opposite side is set as the blade edge, which facilitates the demolding of the sprue. The first mold 3 is symmetrically connected with buffer pads 7 at the front and back. Both buffer pads 7 are located between the two cutters 6. When the cylinders 5 are started, the cutters 6 are moved to precisely cut the sprue. The buffer pads 7 absorb the impact force generated during the cutting process, protecting the mold and cutters from damage. The sprue and plastic parts are automatically demolded by the back of the cutter 6 and the ejection device, respectively.

[0021] like Figure 1-4 As shown, it also includes a fixed frame 8, a guide plate 10, elastic elements 12, a motor 13, and a conveying assembly 14. The fixed frame 8 is welded to the lower side of the mounting frame 1. Elastic elements 12 are evenly spaced on the fixed frame 8. The top of the elastic elements 12 is connected to the guide plate 10. The guide plate 10 is located between the mounting frame 1 and the fixed frame 8. The motor 13 is installed on the fixed frame 8. The conveying assembly 14 is installed on the fixed frame 8. The conveying assembly 14 consists of pulleys and a flat belt. Two pulleys are rotatably connected to the fixed frame 8. A flat belt is wound between the two pulleys. The output shaft of the motor is connected to the pulley near the guide plate through a coupling. The conveying assembly 14 is located to the right of the elastic elements 12. The plastic part of the sprue moves to the conveying assembly 14 under the action of gravity. The motor 13 is started to drive the conveying assembly 14 to transport the sprue and the plastic part to achieve collection.

[0022] like Figure 1-4As shown, it also includes a support plate 15. The support plate 15 is welded to the lower side of the mounting frame 1. The support plate 15 is located on the left side of the fixed frame 8. The support plate 15 has a hexagonal groove to facilitate the movement of the mounting frame 1.

[0023] like Figure 1-4 As shown, it also includes a rubber plate 11, with the rubber plate 11 connected to the upper side of the guide plate 10, and the square opening 9 located above the rubber plate 11.

[0024] When this device is needed, firstly, the second mold 4 is moved to the left to fit against the surface of the first mold 3. The injection molding machine injects the raw material into the first mold 3 through the injection tube 301. The first mold 3 and the second mold 4 cooperate to form a plastic part and a sprue. After the plastic part and the sprue have cooled, the two cylinders 5 are activated. The extension rods of the cylinders 5 extend, causing the two cutters 6 to move towards each other. The cutters 6 precisely cut the sprue. While the cutters are precisely cutting the sprue, the back of the cutter presses against it. Under this influence, the sprue moves towards the second mold 4 and disengages from the first mold 3. Under the action of gravity, the sprue moves towards... The sprue moves downwards, and the sprue falls onto the conveying assembly 14 through the square opening 9 along the guide plate 10. The rubber plate 11 increases the friction between the sprue and the plastic part to prevent excessive displacement. The motor 13 is started, and the output shaft of the motor 13 rotates to drive the conveying assembly 14 to transport and collect the cut sprue. After the sprue cutting operation is completed, the ejection device of the first mold 3 will eject the plastic part and drop it onto the conveying assembly 14 for collection as described above. Subsequent plastic parts and sprues can be handled in the same way. Finally, the motor 13 and cylinder 5 are turned off.

[0025] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation in order to cover all variations and equivalent structures and functions.

Claims

1. A sprue cutting device for a plastic part molding die, characterized in that, Including: Mounting bracket (1) is a mounting carrier for parts. The mounting bracket (1) has a square opening (9) on its lower side. There are four guide rods (2) arranged in a rectangular shape and connected laterally to the inner side of the mounting bracket (1). The first mold (3) is slidably connected between the four guide rods (2). The right side of the first mold (3) has symmetrical grooves on both sides. The injection tube (301) is symmetrically connected to the front side of the first mold (3) and is used to inject raw materials. The second mold (4) is slidably connected between the four guide rods (2), and the second mold (4) is located to the right of the first mold (3); Cylinder (5) is installed on the front and rear sides of the first mold (3); A cutter (6) is connected to one end of the telescopic rods of the two cylinders (5) facing each other. The cutter (6) can slide in the groove on the first mold (3). The cutter (6) is used to cut the sprue. The buffer pads (7) are symmetrically connected to the first mold (3) from front to back. Both buffer pads (7) are located between the two cutters (6). The buffer pads (7) are used to protect the cutters (6) and the first mold (3).

2. The in-mold gate cutting device for a plastic part molding die according to claim 1, characterized in that, It also includes: A fixing bracket (8) is connected to the lower side of the mounting bracket (1); Elastic elements (12) are evenly spaced and connected to the fixed frame (8); A guide plate (10) is connected between the top ends of the elastic member (12). The guide plate (10) is located between the mounting frame (1) and the fixing frame (8). The guide plate (10) is used for guiding plastic parts and sprue. The motor (13) is mounted on the fixed frame (8); The conveying assembly (14) is installed on the fixed frame (8). The front end of the output shaft of the motor (13) is connected to the conveying assembly (14) through a coupling. The conveying assembly (14) is located on the right side of the elastic member (12). The conveying assembly (14) is used to assist in collecting plastic parts and sprues.

3. The in-mold gate cutting device for a plastic part molding die according to claim 2, characterized in that, It also includes: A support plate (15) is connected to the lower side of the mounting frame (1). The support plate (15) is located on the left side of the fixing frame (8). The support plate (15) is used to stabilize the mounting frame (1).

4. The in-mold gate cutting device for a plastic part molding die according to claim 3, characterized in that, It also includes: A rubber plate (11) is connected to the upper side of the guide plate (10), and a square opening (9) is located above the rubber plate (11).

5. The in-mold gate cutting device for a plastic part molding die according to claim 4, characterized in that: The cutter (6) is U-shaped, and the edge of the inner circle of the cutter (6) facing each other is the back of the blade, and the edge facing away from the blade is the edge of the blade.

6. The in-mold gate cutting device for a plastic part molding die according to claim 5, characterized in that: The support plate (15) has a hexagonal groove.

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