Injection molding head of injection molding machine

Abstract

The utility model discloses an injection molding head of an injection molding machine, and particularly relates to the field of injection molding machines, the injection molding head comprises an injection molding head body, the top of the injection molding head body is provided with a butt joint pipe, two sides of the injection molding head body are fixedly connected with a fixed frame, two sides of the interior of the fixed frame are respectively and rotatably connected with a rotatable rotating rod, and the two rotating rods are fixedly connected with a connecting rod. Arc-shaped cover plates are fixedly connected to the outer sides of the two connecting rods, and a rotation limiter is arranged on one side of the fixing frame. When the injection molding head body is not used, the opposite sides of the two arc-shaped cover plates are attached together to form a sealed cylinder to protect the bottom of the injection molding head body, so that dust is prevented from entering the output end of the bottom of the injection molding head body, and when the injection molding head is used, the two connecting rods and the arc-shaped cover plates turn over oppositely to expose the output end of the injection molding head body, so that discharging is facilitated; the dustproof structure of the output end of the injection molding head is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to an injection molding head of an injection molding machine. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold.

[0003] In daily use, the injection molding machine is connected to the injection molding head through a thread, so glue overflow often occurs at the connection between the injection molding machine and the injection molding head. Therefore, a leak-proof injection molding head is urgently needed.

[0004] A Chinese patent discloses a leak-proof injection molding machine injection head with announcement number CN217597673U, and the application date is 2022.05.18. The patented technology places an annular gasket in an annular groove on the first ring, so that the first ring passes through the second ring and is threadedly connected to the pipe. The first ring and the second ring clamp the annular gasket, and the annular gasket improves the sealing between the first ring and the second ring to prevent the leakage of liquid entering the first ring from the pipe, thereby solving the problem of poor connection sealing and easy leakage of the device; however, the above-mentioned device uses a sealing device to seal the output port of the injection molding head to achieve a dust-proof effect, and the rubber plug is inserted into the injection port. Due to the large friction on the rubber surface, the rubber plug is not only difficult to insert but also inconvenient to remove after insertion. Therefore, the inventor provides a new injection molding machine injection head to solve the problems raised in the above-mentioned background technology. Summary of the invention

[0005] The utility model aims to provide an injection molding head for an injection molding machine, which is leak-proof and has a dust-proof structure at the output end of the injection molding head, which is easy to use.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An injection molding machine injection head comprises an injection molding head body, a butt joint tube is arranged on the top of the injection molding head body, fixed frames are fixedly connected to the two sides of the injection molding head body, rotatable rotating rods are rotatably connected to the two inner sides of the fixed frames, connecting rods are fixedly connected to the two rotating rods, arc-shaped cover plates are fixedly connected to the outer sides of the two connecting rods, and a rotation limiter is arranged on one side of the fixed frame.

[0008] As a further solution of the utility model: a gear is fixedly connected to the rotating rod; a guide rod is fixedly connected to the inner bottom side of the fixed frame, and the top of the guide rod is slidably connected to a bidirectional toothed plate that can move up and down, and the two sides of the bidirectional toothed plate are respectively engaged with the corresponding side gears; a support spring is arranged on the outer side of the guide rod, the bottom of the support spring is fixedly connected to the fixed frame, and the top of the support spring is fixedly connected to the bidirectional toothed plate.

[0009] As a further solution of the utility model: the rotation limiter includes a rotatable flip rod, which is rotatably connected to one side of the fixed frame, and a ratchet is fixedly connected to the flip rod; a ratchet is fixedly connected to the front side of the rotating rod on one side, and the ratchet is engaged with the ratchet.

[0010] As a further solution of the utility model: a positioning ring is provided on the outer side of the flip rod, the rear side of the positioning ring is fixedly connected to the fixed frame, a spiral spring is provided inside the positioning ring, the outer end of the spiral spring is fixedly connected to the inside of the positioning ring, and the inner end of the spiral spring is fixedly connected to the surface of the flip rod.

[0011] As a further solution of the utility model: a connecting ring is fixedly connected to the top of the injection head body, and a first thread groove is opened inside the connecting ring; a fitting ring is fixedly connected to the bottom of the butt joint tube, and a second thread groove is opened on the outer side of the fitting ring, and the first thread groove is adapted to the second thread groove.

[0012] As a further solution of the utility model: a contact block is fixedly connected to the inner bottom side of the connecting ring, and an arc-shaped groove is opened on the top of the contact block; an arc-shaped protrusion is fixedly connected to the bottom of the fitting ring, and the shape of the arc-shaped groove is adapted to the shape of the arc-shaped protrusion.

[0013] As a further solution of the present invention: the contact block and the arc-shaped protrusion are made of high-temperature resistant rubber material.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] When the injection molding machine injection head is not in use, the support spring pushes the bidirectional tooth plate to the highest point, and during the pushing process, the two gears are driven to flip outward, so that the two connecting rods flip toward each other, and the opposite sides of the two arc-shaped cover plates fit together to form a sealing cylinder to protect the bottom of the injection molding head body, thereby preventing dust from entering the bottom output end of the injection molding head body. Similarly, when the bidirectional tooth plate is slid downward, the two connecting rods and the arc-shaped cover plate are driven to flip back to back to expose the output end of the injection molding head body, thereby facilitating material discharge. The cooperation of the above structure achieves the effect of convenient use of the dust-proof structure at the output end of the injection molding head.

[0016] In addition, in the process of threaded connection between the connecting block and the fitting ring, the contact block gradually contacts the arc-shaped protrusion until the arc-shaped groove fits the surface of the arc-shaped protrusion and has a slight extrusion deformation, thereby reducing the gap after the connecting ring and the fitting ring are connected, and preventing leakage at the connection between the injection molding machine and the injection molding head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an injection molding head of an injection molding machine;

[0018] Figure 2 It is a schematic diagram of the overall structure of an injection molding head of an injection molding machine from another perspective;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of a connecting ring in an injection molding head of an injection molding machine;

[0020] Figure 4 for Figure 2 Schematic diagram of the structure at A in the middle;

[0021] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of a positioning ring in an injection molding head of an injection molding machine.

[0022] In the figure: 10, injection head body; 11, docking tube; 20, connecting ring; 21, first thread groove; 22, fitting ring; 23, second thread groove; 24, contact block; 25, arc-shaped groove; 26, arc-shaped protrusion; 30, fixing frame; 31, rotating rod; 32, gear; 33, guide rod; 34, two-way tooth plate; 35, supporting spring; 36, ratchet; 37, flip rod; 38, ratchet; 40, positioning ring; 41, volute spring; 50, connecting rod; 51, arc-shaped cover plate. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] like Figure 1 , 2As shown in Figure 3, an injection molding head of an injection molding machine includes an injection molding head body 10. A docking pipe 11 is arranged on the top of the injection molding head body 10. The docking pipe 11 is the output pipe of the injection molding machine. A connecting ring 20 is fixedly connected to the top of the injection molding head body 10. A first thread groove 21 is opened inside the connecting ring 20; a fitting ring 22 is fixedly connected to the bottom of the docking pipe 11. A second thread groove 23 is opened on the outer side of the fitting ring 22. The first thread groove 21 is adapted to the second thread groove 23; when in use, the docking pipe 11 is docked with the injection molding head body 10 by screwing the connecting ring 20 and the fitting ring 22 together through the first thread groove 21 and the second thread groove 23.

[0025] refer to Figure 3 A contact block 24 is fixedly connected to the inner bottom side of the connecting ring 20, and an arc-shaped groove 25 is opened on the top of the contact block 24; an arc-shaped protrusion 26 is fixedly connected to the bottom of the fitting ring 22, and the arc-shaped groove 25 is adapted to the shape of the arc-shaped protrusion 26. The contact block 24 and the arc-shaped protrusion 26 are made of high-temperature resistant rubber material. During the threaded connection between the connecting ring 20 and the fitting ring 22, the contact block 24 gradually contacts with the arc-shaped protrusion 26 until the arc-shaped groove 25 fits with the surface of the arc-shaped protrusion 26 and has a slight extrusion deformation, thereby reducing the gap after the connecting ring 20 and the fitting ring 22 are connected, and preventing leakage at the connection between the injection molding machine and the injection molding head.

[0026] refer to Figure 2 , 4 The front and back sides of the injection head body 10 are fixedly connected with a fixed frame 30, and the left and right sides of the fixed frame 30 are rotatably connected with a rotating rod 31, and the rotating rod 31 is fixedly connected with a gear 32; the bottom side of the fixed frame 30 is fixedly connected with a guide rod 33, and the top of the guide rod 33 is slidably connected with a two-way toothed plate 34 that can move up and down, and the left and right sides of the two-way toothed plate 34 are respectively meshed with the corresponding side gears 32. A support spring 35 is arranged on the outside of the guide rod 33, and the bottom of the support spring 35 is fixedly connected to the fixed frame 30, and the top of the support spring 35 is fixedly connected to the two-way toothed plate 34. The two rotating rods 31 are fixedly connected with a connecting rod 50, and the outer sides of the two connecting rods 50 are fixedly connected with an arc-shaped cover plate 51. When in use, the support spring 35 pushes the two-way tooth plate 34 to the highest position, and during the pushing process, the two gears 32 are turned outward, so that the two connecting rods 50 are turned toward each other, and the opposite sides of the two arc-shaped cover plates 51 are attached together to form a sealing cylinder to protect the bottom of the injection head body 10, thereby preventing dust from entering the bottom output end of the injection head body 10. Similarly, when the two-way tooth plate 34 is slid downward, the two connecting rods 50 and the arc-shaped cover plate 51 are turned back to each other to expose the output end of the injection head body 10, thereby facilitating the discharge of the material.

[0027] Since the support spring 35 can maintain the two arc-shaped cover plates 51 in a fitted state, but cannot maintain the arc-shaped cover plates 51 in a separated state, a rotation limiter is proposed.

[0028] refer to Figure 4 , 5 The rotation limiter includes a flip rod 37, which is rotatably connected to the left surface of the fixed frame 30, and a ratchet 38 is fixedly connected to the flip rod 37; a ratchet 36 is fixedly connected to the front of the left rotation rod 31, and the ratchet 36 is meshed with the ratchet 38.

[0029] Specifically, a positioning ring 40 is provided on the outer side of the flip rod 37, and the rear side of the positioning ring 40 is fixedly connected to the fixed frame 30. A spiral spring 41 is provided inside the positioning ring 40, and the outer end of the spiral spring 41 is fixedly connected to the inside of the positioning ring 40, and the inner end of the spiral spring 41 is fixedly connected to the surface of the flip rod 37.

[0030] When the two-way tooth plate 34 slides downward, it drives the two arc-shaped cover plates 51 to flip back to each other and drives the ratchet 36 to rotate clockwise, so that the ratchet 38 passes over each protruding part of the ratchet 36. When the protruding part of the ratchet 36 contacts the ratchet 38, it drives the ratchet 38 to flip upward, drives the flip rod 37 to flip counterclockwise, and drives the volute spring 41 to deform. When the ratchet 38 passes over this protruding part, the volute spring 41 drives the flip rod 37 to flip in the opposite direction, and drives the ratchet 38 to fit the surface of the ratchet 36. When the two-way tooth plate 34 stops being pressed downward, the support spring 35 rebounds and pushes the two-way tooth plate 34 upward. The upward movement of the two-way tooth plate 34 drives the left rotation rod 31 and the ratchet 36 to flip counterclockwise. When the ratchet 36 flips counterclockwise, the ratchet 38 abuts against the opposite sides of the two protruding parts of the ratchet 36 to hinder the ratchet 36 and the rotation rod 31 from rotating, thereby preventing the two-way tooth plate 34 from moving upward and hindering the two arc-shaped cover plates 51 from merging. When the two arc-shaped cover plates 51 need to be merged, the ratchet 38 only needs to be flipped upward to disengage the ratchet 38 from the surface of the ratchet wheel 36, thereby removing the restriction from the two-way tooth plate 34, and the two-way tooth plate 34 is driven upward by the support spring 35 to merge the two arc-shaped cover plates 51 together.

[0031] The working principle of the utility model is: when the injection molding head body 10 is not in use, the support spring 35 pushes the two-way tooth plate 34 to the highest point, and during the pushing process, the two gears 32 are driven to flip outward, so that the two connecting rods 50 are flipped toward each other, and the opposite sides of the two arc-shaped cover plates 51 are attached together to form a sealing cylinder to protect the bottom of the injection molding head body 10, thereby preventing dust from entering the bottom output end of the injection molding head body 10. Similarly, when the two-way tooth plate 34 is slid downward, the two connecting rods 50 and the arc-shaped cover plate 51 are driven to flip back to back to expose the output end of the injection molding head body 10, thereby facilitating the discharge of materials.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An injection molding machine injection head, comprising an injection molding head body (10), wherein a butt joint (11) is arranged on the top of the injection molding head body (10), characterized in that: The two sides of the injection head body (10) are fixedly connected to a fixed frame (30), the two sides of the interior of the fixed frame (30) are rotatably connected to rotatable rotating rods (31), the two rotating rods (31) are fixedly connected to connecting rods (50), the outer sides of the two connecting rods (50) are fixedly connected to arc-shaped cover plates (51), and a rotation limiter is provided on one side of the fixed frame (30).

2. The injection molding head of an injection molding machine according to claim 1, characterized in that: A gear (32) is fixedly connected to the rotating rod (31); a guide rod (33) is fixedly connected to the inner bottom side of the fixed frame (30); a bidirectional toothed plate (34) that can move up and down is slidably connected to the top of the guide rod (33); two sides of the bidirectional toothed plate (34) are respectively meshed with corresponding side gears (32); a support spring (35) is arranged on the outer side of the guide rod (33); the bottom of the support spring (35) is fixedly connected to the fixed frame (30), and the top of the support spring (35) is fixedly connected to the bidirectional toothed plate (34).

3. The injection molding head of an injection molding machine according to claim 1, characterized in that: The rotation limiter comprises a rotatable flip rod (37), the flip rod (37) being rotatably connected to one side of the fixed frame (30), and a ratchet (38) being fixedly connected to the flip rod (37); and a ratchet (36) being fixedly connected to the front side of the rotation rod (31) on one side, and the ratchet (36) being meshed with the ratchet (38).

4. An injection molding head for an injection molding machine according to claim 3, characterized in that: A positioning ring (40) is arranged on the outside of the flip rod (37), the rear side of the positioning ring (40) is fixedly connected to the fixing frame (30), a spiral spring (41) is arranged inside the positioning ring (40), the outer end of the spiral spring (41) is fixedly connected to the inside of the positioning ring (40), and the inner end of the spiral spring (41) is fixedly connected to the surface of the flip rod (37).

5. The injection molding head of an injection molding machine according to claim 1, characterized in that: A connecting ring (20) is fixedly connected to the top of the injection head body (10), and a first thread groove (21) is provided inside the connecting ring (20); a fitting ring (22) is fixedly connected to the bottom of the butt joint tube (11), and a second thread groove (23) is provided on the outside of the fitting ring (22), and the first thread groove (21) is matched with the second thread groove (23).

6. The injection molding head of an injection molding machine according to claim 5, characterized in that: A contact block (24) is fixedly connected to the inner bottom side of the connecting ring (20), and an arc-shaped groove (25) is provided on the top of the contact block (24); an arc-shaped protrusion (26) is fixedly connected to the bottom of the fitting ring (22), and the arc-shaped groove (25) matches the shape of the arc-shaped protrusion (26).

7. An injection molding head for an injection molding machine according to claim 6, characterized in that: The contact block (24) and the arc-shaped protrusion (26) are both made of high-temperature resistant rubber material.

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