Injection mechanism of injection molding machine

Abstract

The utility model discloses an ejection mechanism of an injection molding machine, which relates to the technical field of injection molding machines and comprises a charging barrel, the front end of the charging barrel is fixedly connected with an injection molding pipe, the front end of the injection molding pipe is movably connected with a connecting pipe, the front end of the connecting pipe is provided with an injection pipe, and the inner side of the connecting pipe is movably connected with the outer side of the injection pipe. A cutting-off assembly is arranged on the outer side of the injection molding pipe, a set of symmetrical connecting rods are fixedly connected to the cutting-off assembly, the connecting rods are fixedly connected with the outer side of the injection molding pipe, and the cutting-off assembly comprises cutters which are symmetrically arranged. According to the utility model, through the arranged cutting assembly, the connecting pipe can be far away from the injection pipe, and the two cutters are close to each other, so that a cooled raw material cylinder exposed between the connecting pipe and the injection pipe can be conveniently cut off, a molded part in a mold can be better demolded and separated, and the molded part is prevented from being damaged in the demolding process. The portion located in the injection tube causes damage to the molded part during the pulling process.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically an injection mechanism for an injection molding machine. Background Technology

[0002] Injection molding machines are a type of plastic processing equipment widely used in modern industrial production. They are mainly used to inject molten plastic raw materials into a mold through an injection mechanism, and after cooling and solidification, the desired plastic products are obtained. As the core part of the injection molding machine, the performance of the injection mechanism directly affects the molding quality and production efficiency of the products.

[0003] However, existing injection mechanisms in injection molding machines have certain shortcomings in the process of injecting raw materials into the mold. After the raw materials are injected into the mold, it is necessary to prevent the raw materials from accumulating excessively in the mold, which would affect the molding effect. At the same time, it is also necessary to avoid the connection between the cooled raw materials inside the injection mechanism and the molded parts when the molded parts are separated from the molded parts, which could lead to traction damage to the molded parts. Furthermore, when the raw materials move inside the barrel, they are usually fully mixed in the melting section. The mixing zone in the middle section of a conventional barrel is relatively small, which can easily cause uneven mixing of large particles of raw materials. Therefore, an injection mechanism for injection molding machines is needed to solve the existing shortcomings. Utility Model Content

[0004] One of the technical problems to be solved by this application is: by setting a cutting component, to avoid damage to the molded part caused by the part located in the injection tube during the demolding process; by setting a stirring component, the raw materials can be continuously and frequently mixed within one end of the barrel, thereby making the molten raw materials more uniformly mixed.

[0005] To address the aforementioned technical problems, this application provides an injection mechanism for an injection molding machine, comprising a barrel, an injection tube fixedly connected to the front end of the barrel, a connecting tube movably connected to the front end of the injection tube, an injection pipe at the front end of the connecting tube, and an inner side of the connecting tube movably connected to the outer side of the injection pipe. A cutting assembly is provided on the outer side of the injection tube, and a set of symmetrical connecting rods are fixedly connected to the cutting assembly. The connecting rods are fixedly connected to the outer side of the injection pipe. The cutting assembly includes cutters arranged symmetrically, with the connecting tube located between the cutters. One end of the cutting assembly is connected to the outer side of the connecting tube. A push screw is movably connected inside the barrel, and a stirring assembly is provided in the middle section of the barrel.

[0006] The present invention is further configured such that the cutting assembly includes a support frame, a slider, a support rod, and a connecting rod, wherein the support frame, slider, support rod, and connecting rod are symmetrically arranged, the slider is slidably connected to the inner side of the support frame, the support rod is fixedly connected to one side of the slider, one end of the connecting rod is movably connected to the other side of the slider through a rotating shaft, and the other end of the connecting rod is movably connected to the outer side of the connecting tube through a rotating shaft, and the support rod is fixedly connected to the cutter.

[0007] The present invention is further configured such that a guide rod is fixedly connected to the inner side of the support frame, the guide rod passes through the slider and is movably connected to the slider, and a return spring is sleeved on the outer side of the guide rod, one end of the return spring is fixedly connected to the inner side of the support frame and the other end of the return spring is fixedly connected to the outer side of the slider.

[0008] The present invention is further configured such that the support frames are all fixedly connected to the outside of the injection molding tube, a set of symmetrical through holes are opened on the outside of the connecting tube, and one end of the support frame is slidably connected to the through holes respectively. A set of symmetrical hydraulic rods are fixedly connected to the outside of the injection molding tube, and the telescopic end of the hydraulic rod is fixedly connected to the end of the connecting tube.

[0009] The present invention is further configured such that multiple sets of stirring rods are fixedly connected to the middle section of the propulsion screw, and each set of stirring rods is arranged in a circular array.

[0010] The present invention is further configured such that the stirring assembly includes a connecting cylinder, two stirring rods, a toothed ring, a gear, and a receiving box. The toothed ring is fixedly connected to the outside of the connecting cylinder, and the gear is movably connected to the inside of the receiving box through a rotating shaft, and the gear meshes with the toothed ring. The two stirring rods are arranged in multiple groups, and each group of two stirring rods is distributed in a circular array.

[0011] The present invention is further configured such that the connecting cylinder and the gear ring are movably connected to the inside of the material cylinder, the receiving box is fixedly connected to the outside of the material cylinder, and the stirring rod one and the stirring rod two are staggered. A servo motor is fixedly connected to the outside of the material cylinder, and the output end of the servo motor is fixedly connected to the shaft of the gear.

[0012] Beneficial effects:

[0013] Compared with existing technologies, the injection mechanism of this injection molding machine has the following advantages:

[0014] I. The cutting component of this utility model helps to move the connecting pipe away from the injection pipe while the two cutters move closer to each other, thereby facilitating the cutting of the cooled raw material cylinder exposed between the connecting pipe and the injection pipe. This is beneficial for better demolding and separation of the molded part inside the mold, and avoids damage to the molded part caused by the part located in the injection pipe during the demolding process.

[0015] II. This utility model, through its set stirring assembly, when the raw material moves to the melting section, the push screw drives the stirring rod one to rotate, and at the same time, the servo motor is started, driving the gear shaft to rotate. Since the gear meshes with the gear ring, it drives the connecting cylinder to rotate, so that the stirring rod two rotates synchronously, and the direction of rotation of the stirring rods is controlled to be opposite, thereby stirring the raw material in the melting section. Furthermore, the staggered distribution of stirring rod one and stirring rod two allows the raw material to be continuously and frequently mixed within one end of the barrel, thereby making the molten raw material more uniformly mixed. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the stirring assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cutting component structure of this utility model;

[0020] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A;

[0021] Figure 6 This utility model Figure 4 A magnified structural diagram at point B in the middle.

[0022] In the diagram: 1. Barrel; 2. Injection tube; 3. Connecting tube; 4. Injection tube; 5. Cutting assembly; 501. Cutter; 502. Support frame; 503. Slider; 504. Support rod; 505. Connecting rod; 6. Connecting rod; 7. Propeller screw; 8. Mixing assembly; 801. Connecting cylinder; 802. Mixing rod two; 803. Gear ring; 804. Gear; 805. Receiving box; 9. Guide rod; 10. Return spring; 11. Perforation; 12. Hydraulic rod; 13. Mixing rod one; 14. Servo motor. Detailed Implementation

[0023] 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.

[0024] like Figure 1-6As shown, this utility model provides a technical solution: an injection mechanism for an injection molding machine, including a barrel 1, which is fixed on a worktable. An injection tube 2 is fixedly connected to the front end of the barrel 1, and a connecting tube 3 is movably connected to the front end of the injection tube 2. An injection tube 4 is provided at the front end of the connecting tube 3, and the inner side of the connecting tube 3 is movably connected to the outer side of the injection tube 4. A cutting assembly 5 is provided on the outer side of the injection tube 2, and a set of symmetrical connecting rods 6 are fixedly connected to the cutting assembly 5. The connecting rods 6 are fixedly connected to the outer side of the injection tube 4. The cutting assembly 5 includes cutters 501, which are symmetrically arranged, and the connecting tube 3 is located between the cutters 501. The cutters 501 can cut the cooled raw material cylinder. One end of the cutting assembly 5 is connected to the outer side of the connecting tube 3. A push screw 7 is movably connected inside the barrel 1. The raw material is poured into the barrel 1 through the feeding section, and the push screw 7 is driven by a motor to rotate inside the barrel 1, thereby driving the raw material to move inside the barrel 1. A stirring assembly 8 is provided in the middle section of the barrel 1.

[0025] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the cutting assembly 5 also includes a support frame 502, a slider 503, a support rod 504, and a connecting rod 505. The support frame 502, slider 503, support rod 504, and connecting rod 505 are symmetrically arranged. The sliders 503 are slidably connected to the inner side of the support frame 502. The support rods 504 are fixedly connected to one side of the slider 503. One end of the connecting rod 505 is movably connected to the other side of the slider 503 via a pivot, and the other end of the connecting rod 505 is movably connected to the outer side of the connecting tube 3 via a pivot. The support rods 504 are fixedly connected to the cutter 501. Guide rods 9 are fixedly connected to the inner side of the support frame 502, passing through the slider 503, and the guide rods 9 and slider 503 are connected... 03. Movable connection: A return spring 10 is sleeved on the outer side of the guide rod 9. One end of the return spring 10 is fixedly connected to the inner side of the support frame 502, and the other end of the return spring 10 is fixedly connected to the outer side of the slider 503. The support frame 502 is fixedly connected to the outer side of the injection tube 2. A set of symmetrical through holes 11 is opened on the outer side of the connecting tube 3, and one end of the support frame 502 is slidably connected to the through holes 11 respectively. Under the action of the through holes 11, the connecting tube 3 can always move along the injection tube 2, and the injection tube 2 does not move in conjunction with the support frame 502. A set of symmetrical hydraulic rods 12 is fixedly connected to the outer side of the injection tube 2, and the telescopic end of the hydraulic rod 12 is fixedly connected to the end of the connecting tube 3.

[0026] After the raw material is injected into the mold, the hydraulic rod 12 controls the connecting pipe 3 to move along the injection pipe 2 away from the injection pipe 4, thereby driving the connecting rod 505 to rotate. This pulls the slider 503 to move along the inner guide rod 9 of the support frame 502, causing the return spring 10 to compress and shorten. As a result, the two sliders 503 and the support rod 504 move closer to each other, thereby controlling the cutter 501 to cut the raw material exposed in the injection pipe 4. After the raw material cutting operation is completed, the connecting pipe 3 can be reset, and the front end of the injection pipe 4 can be controlled to move away from the mold. This helps to achieve the goal of moving the connecting pipe 3 away from the injection pipe 4 while the two cutters 501 move closer to each other, which facilitates the cutting of the cooled raw material cylinder exposed between the connecting pipe 3 and the injection pipe 4. This is beneficial for better demolding and separation of the molded part in the mold, and avoids damage to the molded part caused by the part located in the injection pipe 4 during the demolding process.

[0027] like Figure 1 , Figure 3 and Figure 5 As shown, multiple sets of stirring rods 13 are fixedly connected to the middle section of the propulsion screw 7, and each set of stirring rods 13 is arranged in a circular array. In this embodiment, there are four stirring rods 13 in each set. The stirring assembly 8 includes a connecting cylinder 801, stirring rods 802, a gear ring 803, a gear 804, and a receiving box 805. The gear ring 803 is fixedly connected to the outside of the connecting cylinder 801, and the gear 804 is movably connected to the inside of the receiving box 805 through a rotating shaft. The gear 804 and the gear ring 802 are also connected to each other. The three-phase meshing, the stirring rods 802 are arranged in multiple groups, and each group of stirring rods 802 is arranged in a circular array. In this embodiment, there are four stirring rods 802 in each group. The connecting cylinder 801 and the toothed ring 803 are movably connected to the inside of the material cylinder 1. The receiving box 805 is fixedly connected to the outside of the material cylinder 1. The stirring rods 13 and 802 are staggered. The servo motor 14 is fixedly connected to the outside of the material cylinder 1, and the output end of the servo motor 14 is fixedly connected to the shaft of the gear 804.

[0028] When the raw material moves to the melting section, the push screw 7 drives the stirring rod 13 to rotate, and at the same time, the servo motor 14 is started, which drives the shaft of gear 804 to rotate. Since gear 804 meshes with gear ring 803, it drives the connecting cylinder 801 to rotate, so that stirring rod 802 rotates synchronously and the direction of rotation of the stirring rods is controlled to be opposite, thereby stirring the raw material in the melting section. The staggered distribution of stirring rod 13 and stirring rod 802 can make the raw material continuously and frequently mixed within one end of the barrel 1, so that the molten raw material is mixed more evenly.

[0029] Working principle: In use, the raw material is first poured into the cylinder 1 through the feeding section, and the screw 7 driven by the motor rotates inside the cylinder 1, thereby moving the raw material inside the cylinder 1. When the raw material moves to the melting section, the screw 7 drives the stirring rod 13 to rotate, and at the same time, the servo motor 14 is started, driving the gear 804 shaft to rotate. Since the gear 804 meshes with the gear ring 803, it drives the connecting cylinder 801 to rotate, so that the stirring rod 802 rotates synchronously and in opposite directions, thereby stirring the raw material in the melting section and making it more uniformly mixed. In the initial stage, one end of the connecting pipe 3 is movably sleeved on the injection pipe 2. The other end of the connecting pipe 3 is movably sleeved on the outside of the injection pipe 4, and the outlet end of the injection pipe 4 is connected to the feed port of the mold. When the raw material is injected into the mold, the hydraulic rod 12 controls the connecting pipe 3 to move away from the injection pipe 4 along the injection pipe 2, thereby driving the connecting rod 505 to rotate, thereby pulling the slider 503 to move along the inner guide rod 9 of the support frame 502, so that the return spring 10 is compressed and shortened, thereby the two sliders 503 and the support rod 504 move closer to each other, thereby controlling the cutter 501 to cut the raw material exposed in the injection pipe 4. After the raw material cutting operation is completed, the connecting pipe 3 can be reset, and the front end of the injection pipe 4 can be controlled to move away from the mold.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mechanism for an injection molding machine, comprising a barrel (1), characterized in that: The front end of the barrel (1) is fixedly connected to an injection tube (2), and the front end of the injection tube (2) is movably connected to a connecting tube (3). The front end of the connecting tube (3) is provided with an injection tube (4), and the inner side of the connecting tube (3) is movably connected to the outer side of the injection tube (4). The outer side of the injection tube (2) is provided with a cutting assembly (5). A set of symmetrical connecting rods (6) is fixedly connected to the cutting assembly (5). The connecting rods (6) are fixedly connected to the outer side of the injection tube (4). The cutting assembly (5) includes a cutter (501). The cutters (501) are symmetrically arranged, and the connecting tube (3) is located between the cutters (501). One end of the cutting assembly (5) is connected to the outer side of the connecting tube (3). The inside of the barrel (1) is movably connected to a push screw (7), and the middle section of the barrel (1) is provided with a stirring assembly (8).

2. The injection mechanism of an injection molding machine according to claim 1, characterized in that: The cutting assembly (5) further includes a support frame (502), a slider (503), a support rod (504), and a connecting rod (505). The support frame (502), slider (503), support rod (504), and connecting rod (505) are symmetrically arranged. The slider (503) is slidably connected to the inner side of the support frame (502). The support rod (504) is fixedly connected to one side of the slider (503). One end of the connecting rod (505) is movably connected to the other side of the slider (503) through a rotating shaft. The other end of the connecting rod (505) is movably connected to the outer side of the connecting tube (3) through a rotating shaft. The support rod (504) is fixedly connected to the cutter (501).

3. The injection mechanism of an injection molding machine according to claim 2, characterized in that: The inner side of the support frame (502) is fixedly connected with a guide rod (9), the guide rod (9) passes through the slider (503), and the guide rod (9) is movably connected to the slider (503). The outer side of the guide rod (9) is fitted with a return spring (10), one end of the return spring (10) is fixedly connected to the inner side of the support frame (502), and the other end of the return spring (10) is fixedly connected to the outer side of the slider (503).

4. The injection mechanism of an injection molding machine according to claim 3, characterized in that: The support frame (502) is fixedly connected to the outside of the injection tube (2). A set of symmetrical perforations (11) are opened on the outside of the connecting tube (3), and one end of the support frame (502) is slidably connected to the perforations (11). A set of symmetrical hydraulic rods (12) are fixedly connected to the outside of the injection tube (2), and the telescopic end of the hydraulic rod (12) is fixedly connected to the end of the connecting tube (3).

5. The injection mechanism of an injection molding machine according to claim 1, characterized in that: The middle section of the propulsion screw (7) is fixedly connected to multiple sets of stirring rods (13), and each set of stirring rods (13) is arranged in a circular array.

6. The injection mechanism of an injection molding machine according to claim 5, characterized in that: The stirring assembly (8) includes a connecting cylinder (801), stirring rod two (802), a gear ring (803), a gear (804), and a receiving box (805). The gear ring (803) is fixedly connected to the outside of the connecting cylinder (801). The gear (804) is movably connected to the inside of the receiving box (805) through a rotating shaft, and the gear (804) meshes with the gear ring (803). The stirring rod two (802) is arranged in multiple groups, and each group of stirring rod two (802) is distributed in a circular array.

7. The injection mechanism of an injection molding machine according to claim 6, characterized in that: The connecting cylinder (801) and the gear ring (803) are both movably connected to the inside of the material cylinder (1). The receiving box (805) is fixedly connected to the outside of the material cylinder (1). The stirring rod one (13) and the stirring rod two (802) are staggered. A servo motor (14) is fixedly connected to the outside of the material cylinder (1), and the output end of the servo motor (14) is fixedly connected to the shaft of the gear (804).

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