Nozzle structure of injection molding machine

Abstract

The utility model belongs to the technical field of nozzle structures, and particularly relates to a nozzle structure of an injection molding machine, which comprises a nozzle main body, a thread part of the nozzle main body is in threaded connection with a screwing sleeve, the front section of the outer side of the nozzle main body is fixedly connected with a flange, and the flange and the nozzle main body are of an integrated structure. The outer side of the flange is slidably connected with a nozzle opening in a sleeving mode, a locking pin is slidably connected into the nozzle opening, one end of the locking pin abuts against the screwing sleeve, the other end of the locking pin abuts against the nozzle body and the flange, and an anti-overflow mechanism is arranged on the inner side of the nozzle body. According to the utility model, the anti-overflow mechanism is arranged on the inner side of the nozzle opening, so that after melt in the nozzle main body is ejected through the nozzle opening, the plug can automatically plug the conical barrel under the tension of the spring, and the residual melt is prevented from flowing out from the nozzle opening.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzle structures, in particular to a nozzle structure of an injection molding machine. Background Art

[0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. The nozzle of the injection molding machine is a component used to inject molten plastic material into the mold cavity. Its structure mainly includes the nozzle sleeve and the nozzle head.

[0003] The utility model patent with announcement number CN206048674U discloses an injection molding machine nozzle, including a nozzle head, a nozzle connector and a nozzle seat, the nozzle head has a first flow channel, the first flow channel includes a tapered section and a cylindrical section connected to the tapered section, the nozzle connector includes a nozzle core adapted to the shape of the tapered section and a connecting pipe connected to the nozzle core, a second flow channel for connecting the connecting pipe with the first flow channel is opened on the nozzle core, a cylindrical third flow channel for injecting fluid is provided on the nozzle seat, and two ends of the connecting pipe are respectively slidably matched with the cylindrical section of the first flow channel and the third flow channel; the nozzle head and the nozzle connector are connected by a tension spring arranged along the axial direction of the nozzle head, and the nozzle head and the nozzle seat are fixed together by a connecting rod; the injection molding machine nozzle of the structure, after each injection is completed, the nozzle core blocks the nozzle head, thereby preventing the phenomenon of wire drawing and flow extension caused by the continued outflow of molten material, thereby improving product quality.

[0004] When the nozzle of the existing injection molding machine is stopped, the residual molten material in the molten material tube will flow out of the nozzle, causing the injection volume to exceed the standard, and the nozzle head needs to be cleaned regularly. The traditional installation structure requires special tools to disassemble and assemble, which is quite troublesome. Therefore, improvement is needed. Utility Model Content

[0005] The utility model aims to provide a nozzle structure of an injection molding machine, which solves the problem that when the nozzle of the existing injection molding machine stops being used, the residual molten material in the molten material tube will flow out of the nozzle, causing the injection volume to exceed the standard. At the same time, it solves the problem that the nozzle head needs to be cleaned regularly and the traditional installation structure requires special tools for disassembly and assembly, which is relatively troublesome.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nozzle structure of an injection molding machine, comprising a nozzle body, a threaded portion of the nozzle body being connected to a screw sleeve by a thread, a flange being fixedly connected to the outer front section of the nozzle body, and the flange and the nozzle body being an integral structure, a nozzle port being slidably sleeved on the outer side of the flange, a locking pin being slidably connected to the inside of the nozzle port, one end of the locking pin being in conflict with the screw sleeve, and the other end of the locking pin being in conflict with both the nozzle body and the flange, and an anti-overflow mechanism being arranged on the inner side of the nozzle body.

[0007] Preferably, a retaining ring is fixedly connected to the middle section of the locking pin, and the retaining ring is slidably connected to the inside of the nozzle opening, a spring 1 is sleeved on the outside of the locking pin, one end of the spring 1 is fixedly connected to the retaining ring, and the other end of the spring 1 is fixedly connected to the inner surface of the nozzle opening. The retaining ring can be used to apply the elastic force of the spring 1 to the locking pin.

[0008] Preferably, a retaining ring is fixedly connected to the inner side of the nozzle opening, and a sealing ring is embedded on the side of the retaining ring close to the nozzle body, and the sealing ring contacts the nozzle body. The sealing ring can ensure the sealing between the nozzle opening and the nozzle body after the nozzle opening is installed on the nozzle body.

[0009] Preferably, the anti-overflow mechanism comprises a cone tube fixedly connected to the inner wall of the nozzle opening, a plurality of fixed rods are fixedly connected to the inner side of the cone tube, and a support block is fixedly connected between the plurality of fixed rods, a sleeve is fixedly connected to the left side of the support block, a sliding pin is slidably connected to the inside of the sleeve, a plug is fixedly connected to the end of the sliding pin away from the sleeve, and the plug is slidably connected to the inner side of the left end opening of the cone tube, and a second spring is arranged on the inner side of the sleeve. By setting the anti-overflow mechanism, residual molten material can be prevented from flowing out of the nozzle opening.

[0010] Preferably, one end of the second spring is fixedly connected to the sliding pin, and the other end of the second spring is fixedly connected to the inner surface of the sleeve. By setting the second spring, the elastic force can be applied to the plug.

[0011] Preferably, a protective sleeve is fixedly connected between the support block and the plug and located outside the sleeve, and the protective sleeve is a stainless steel bellows. The setting of the protective sleeve has a protective effect on the spring 2.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model sets an anti-overflow mechanism on the inner side of the nozzle opening. When the molten material in the nozzle body is ejected through the nozzle opening, the plug will automatically block the cone under the tension of the spring, thereby preventing the residual molten material from flowing out of the nozzle opening.

[0014] 2. The utility model provides a flange on the outside of the nozzle body, and then provides a locking pin which is retracted by a spring in the nozzle mouth. When the nozzle mouth sleeve is arranged on the outside of the nozzle body, the sliding pin is moved down and stuck at the flange by squeezing the sleeve, so that the installation of the nozzle mouth is completed. Similarly, the locking pin can be reset by reversing the sleeve to remove the nozzle mouth. The operation is simple and convenient, and it is easy to disassemble and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 A front cross-sectional view of

[0017] Figure 3 For the utility model Figure 1 A sectional stereogram of a local structure;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of point A.

[0019] In the figure: 1. Nozzle body; 2. Flange; 3. Nozzle mouth; 4. Locking pin; 5. Retaining ring; 6. Spring 1; 7. Screw sleeve; 8. Retaining ring; 9. Sealing ring; 10. Cone; 11. Fixed rod; 12. Support block; 13. Sleeve; 14. Sliding pin; 15. Plug; 16. Spring 2; 17. Protective sleeve; 18. Anti-overflow mechanism. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-3A nozzle structure of an injection molding machine includes a nozzle body 1, a threaded portion of the nozzle body 1 is connected to a screw sleeve 7 through a thread, a flange 2 is fixedly connected to the outer front section of the nozzle body 1, and the flange 2 and the nozzle body 1 are an integrated structure, a nozzle opening 3 is slidably sleeved on the outer side of the flange 2, a locking pin 4 is slidably connected inside the nozzle opening 3, one end of the locking pin 4 is in contact with the screw sleeve 7, and the other end of the locking pin 4 is in contact with both the nozzle body 1 and the flange 2, a retaining ring 8 is fixedly connected to the inner side of the nozzle opening 3, and a sealing ring 9 is embedded on the side of the retaining ring 8 close to the nozzle body 1, and the sealing ring 9 is in contact with the nozzle body 1. By setting the sealing ring 9, the sealing between the nozzle opening 3 and the nozzle body 1 can be guaranteed after the nozzle opening 3 is installed on the nozzle body 1.

[0022] See also Figure 2-4 The middle section of the locking pin 4 is fixedly connected with a retaining ring 5, and the retaining ring 5 is slidably connected to the inside of the nozzle opening 3. A spring 6 is sleeved on the outside of the locking pin 4, one end of the spring 6 is fixedly connected to the retaining ring 5, and the other end of the spring 6 is fixedly connected to the inner surface of the nozzle opening 3. The retaining ring 5 can act on the locking pin 4 through the elastic force of the spring 6.

[0023] See also Figure 2 , an anti-overflow mechanism 18 is arranged inside the nozzle body 1, and the arrangement of the anti-overflow mechanism 18 can prevent the residual molten material from flowing out from the nozzle port 3. The anti-overflow mechanism 18 includes a cone 10 fixedly connected to the inner wall of the nozzle port 3, a plurality of fixed rods 11 are fixedly connected to the inner side of the cone 10, and a support block 12 is fixedly connected between the plurality of fixed rods 11, a sleeve 13 is fixedly connected to the left side of the support block 12, a sliding pin 14 is slidably connected inside the sleeve 13, a plug 15 is fixedly connected to one end of the sliding pin 14 away from the sleeve 13, and the plug 15 is slidably connected to the inner side of the left end opening of the cone 10, and a spring 16 is arranged inside the sleeve 13. One end of the spring 16 is fixedly connected to the sliding pin 14, and the other end of the spring 16 is fixedly connected to the inner surface of the sleeve 13. By the arrangement of the spring 16, the elastic force can be applied to the plug 15. A protective sleeve 17 is fixedly connected between the support block 12 and the plug 15 and located outside the sleeve 13, and the protective sleeve 17 is a stainless steel bellows. The setting of the protective sleeve 17 has a protective effect on the spring 16.

[0024] The specific implementation process of the utility model is as follows: when in use, firstly, the nozzle opening 3 is sleeved on the end of the nozzle body 1 until the sealing ring 9 on the retaining ring 8 contacts the nozzle body 1, and then the screw sleeve 7 is rotated, the screw sleeve 7 is transversely moved and squeezes the locking pin 4, the locking pin 4 is retracted and stuck at the flange 2, and at the same time, the locking pin 4 compresses the spring 1 6 through the retaining ring 5, so that the nozzle opening 3 is installed on the nozzle body 1. Similarly, the screw sleeve 7 is reversed to make the screw sleeve 7 disengage from the locking pin 4. In this way, the spring 1 6 is reset through the retaining ring 5 to reset the locking pin 4, and the nozzle opening 3 can be removed, which is simple and convenient to operate.

[0025] When the molten material in the nozzle body 1 enters the cone cylinder 10 in the nozzle port 3, the plug 15 is then opened and separated from the cone cylinder 10. At the same time, the spring 16 is in a stretched state, and then the molten material is ejected normally from the nozzle port 3. After the molten material is ejected, the plug 15 will automatically seal the cone cylinder 10 under the pulling force of the spring 16, thereby preventing the residual molten material from flowing out of the nozzle port 3.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle structure of an injection molding machine, comprising a nozzle body (1), characterized in that: The threaded portion of the nozzle body (1) is connected to a screw sleeve (7) through a thread, the outer front section of the nozzle body (1) is fixedly connected to a flange (2), and the flange (2) and the nozzle body (1) are an integrated structure, the outer side of the flange (2) is slidably sleeved with a nozzle opening (3), the interior of the nozzle opening (3) is slidably connected to a locking pin (4), one end of the locking pin (4) is in contact with the screw sleeve (7), and the other end of the locking pin (4) is in contact with both the nozzle body (1) and the flange (2), and an anti-overflow mechanism (18) is provided on the inner side of the nozzle body (1).

2. The nozzle structure of an injection molding machine according to claim 1, characterized in that: A retaining ring (5) is fixedly connected to the middle section of the pin body of the locking pin (4), and the retaining ring (5) is slidably connected to the inside of the nozzle opening (3). A spring (6) is sleeved on the outer side of the pin body of the locking pin (4), one end of the spring (6) is fixedly connected to the retaining ring (5), and the other end of the spring (6) is fixedly connected to the inner surface of the nozzle opening (3).

3. The nozzle structure of an injection molding machine according to claim 1, characterized in that: A retaining ring (8) is fixedly connected to the inner side of the nozzle opening (3), and a sealing ring (9) is embedded in the side of the retaining ring (8) close to the nozzle body (1), and the sealing ring (9) contacts the nozzle body (1).

4. The nozzle structure of an injection molding machine according to claim 1, characterized in that: The anti-overflow mechanism (18) comprises a cone cylinder (10) fixedly connected to the inner wall of the nozzle port (3), a plurality of fixed rods (11) are fixedly connected to the inner side of the cone cylinder (10), and a support block (12) is fixedly connected between the plurality of fixed rods (11), a sleeve (13) is fixedly connected to the left side of the support block (12), a sliding pin (14) is slidably connected to the inside of the sleeve (13), a plug (15) is fixedly connected to the end of the sliding pin (14) away from the sleeve (13), and the plug (15) is slidably connected to the inner side of the left end opening of the cone cylinder (10), and a spring 2 (16) is arranged on the inner side of the sleeve (13).

5. The nozzle structure of an injection molding machine according to claim 4, characterized in that: One end of the second spring (16) is fixedly connected to the sliding pin (14), and the other end of the second spring (16) is fixedly connected to the inner surface of the sleeve (13).

6. The nozzle structure of an injection molding machine according to claim 4, characterized in that: A protective sleeve (17) is fixedly connected between the support block (12) and the plug (15) and located outside the sleeve (13), and the protective sleeve (17) is a stainless steel bellows.

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