Injection molding machine with rotatable injection assembly

Abstract

The utility model provides an injection molding machine with a rotatable injection component, which comprises an injection component, a front support and a rear support are respectively arranged on two sides of the lower end of the injection component, and a sliding block is mounted at the upper end of the front support; the sliding block is in rolling connection with the front support through a rolling bearing, so that the sliding block can horizontally move, and the moving direction of the sliding block is perpendicular to the moving direction of the injection assembly; rotating bearings are arranged on the sliding block and the rear support; a front rotating shaft and a rear rotating shaft are vertically arranged at the front and rear ends of the lower side of the injection assembly respectively; the front rotating shaft and the rear rotating shaft are inserted into the rotating bearing; a plasticizing assembly is arranged at the end, close to the fixed mold plate, of the injection assembly, and a screw driven by a motor is arranged in the plasticizing assembly. When the screw rod in the plasticizing assembly needs to be replaced, the injection assembly is firstly moved to be separated from and far away from the fixed mold plate, and then the outlet part of the injection assembly is rotated. When the screw rod is replaced, the process of disassembling and assembling the injection assembly is not needed, enough operation space is provided, and operation is easy and convenient.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically an injection molding machine with a rotatable injection component. Background Technology

[0002] Injection molding machines include an injection unit that melts plastic particles and then feeds the molten plastic into a mold to form the final product.

[0003] The injection unit includes a plasticizing component, which contains a motor-driven screw. Plastic particles are conveyed towards the fixed mold through the screw and melted into a liquid state under the action of the heating component.

[0004] When the type and requirements of injection molding need to be changed, different screws need to be replaced. However, since the screw is hidden inside the plasticizing component housing when it is working, even after the injection component is far away from the mold platen, there is still not enough space to disassemble and install the screw. Therefore, the entire injection component is usually disassembled first, and then the screw is disassembled and installed. This is a lot of work and very inefficient. Utility Model Content

[0005] To address the technical problems in the background art, this utility model discloses an injection molding machine with a rotatable injection component.

[0006] This utility model provides an injection molding machine with a rotatable injection assembly, including an injection assembly with a front support and a rear support respectively provided on both sides of its lower end, and a slider installed on the upper end of the front support; the slider is rotatably connected to the front support through a rolling bearing, so that the slider can move horizontally, and its movement direction is perpendicular to the movement direction of the injection assembly.

[0007] Rotary bearings are installed on both the slider and the rear support;

[0008] The front and rear ends of the lower side of the injection assembly are respectively provided with vertically arranged front and rear rotating shafts; the front and rear rotating shafts are inserted into the rotating bearings;

[0009] A plasticizing component is provided at one end of the injection unit near the fixed template, and a motor-driven screw is provided inside the plasticizing component;

[0010] The screw deviates from the fixed template by moving and rotating the injection component horizontally near one end of the template.

[0011] When the screw in the plasticizing assembly needs to be replaced, first move the injection assembly away from the fixed mold plate, and then rotate the outlet portion of the injection assembly. During rotation, the slider moves accordingly, causing the outlet end of the injection assembly to deviate from the fixed mold plate and point towards its outer area. This ensures that the screw is not obstructed by the fixed mold plate when pulled out of the plasticizing assembly. Therefore, this invention eliminates the need for disassembling and reassembling the injection assembly when replacing the screw, provides sufficient operating space, and is simple and convenient to operate.

[0012] The front and rear rotating shafts are typically fixed to the injection assembly first, and then inserted into the rotating bearing to achieve a rotating connection. This setup is not only structurally complex, but also difficult to operate. Therefore, a further improvement is made: both the front and rear rotating shafts are made of semi-threaded bolts that pass through the rotating bearing upwards; the threaded posts of the front and rear rotating shafts are inserted into the rotating bearing using an interference fit, and the threaded posts are fixedly connected to the injection assembly.

[0013] To improve the stability of the skateboard and prevent it from falling off the front support, a further improvement is made: a horizontally arranged skateboard is provided on the top of the front support; U-shaped grooves are provided on both sides of the slider, with their openings facing horizontally and arranged opposite each other; the U-shaped grooves engage with the sides of the skateboard.

[0014] The position and structure of the rolling bearing directly affect the movement stability of the slider. Based on this, a further improvement is made: a vertically arranged connecting shaft is led out from the upper wall of the U-shaped groove; the rolling bearing is installed on the connecting shaft and is in rolling connection with the side of the slide plate.

[0015] The slider slides on the upper surface of the slide plate, resulting in high friction. Based on this, a further improvement is made as follows: a groove is provided at the lower end of the slider; a first lubricating plate with a lubricating function is installed in the groove; the first lubricating plate is connected to the slide plate; and a gap is provided between the lower end surface of the slider and the upper end surface of the slide plate.

[0016] Because the injection unit's outlet may be lower than the plasticizing unit's inlet when injecting raw materials, preventing accurate material entry, a further improvement is made: an adjusting bolt is threaded onto the slide plate, with its threaded end facing upwards and abutting against the lower end face of the slide block. This allows the injection unit's inlet to be raised by tightening the adjusting bolt. When the injection unit needs screw replacement, the adjusting bolt is first tightened so that its threaded end is lower than the upper end face of the slide plate, preventing obstruction of the injection unit's rotation.

[0017] After the adjusting bolt raises the injection assembly, the position of the injection assembly becomes unstable. Based on this, a further improvement is made: the adjusting bolt is provided with an axially arranged through hole; the locking bolt passes through the through hole and is threadedly connected to the slider.

[0018] Since the other end of the injection assembly will generate sliding friction with the rear support when it rotates, resulting in a large frictional force, a further improvement is made as follows: a notch is provided on the top of the rear support; a second lubricating plate with a lubricating function is engaged in the notch; the upper end face of the second lubricating plate is connected to the lower end face of the injection assembly; and a gap is provided between the lower end face of the injection assembly and the upper end face of the rear support.

[0019] Because the injection assembly is heavy and has high inertia, it is easy for it to slide off the slide plate and difficult to slide to the set position. Therefore, a further improvement is made: a baffle is installed at one end of the slide plate, and a limit bolt is threaded to the other end; the head of the limit bolt protrudes upwards from the slide plate, and its position is configured such that when the injection assembly's inlet is accurately inserted into the template inlet, the limit bolt is close to the slider and there is a gap between them. With this configuration, when the screw needs to be disassembled, the moving slider is blocked by the baffle, preventing it from falling off the slide plate; since the limit bolt cannot accurately limit the slider, its position is designed so that when the injection assembly resets, it first touches the limit bolt to stop, and then can be pulled back a short distance.

[0020] Because the injection assembly has a positional error in the slider's movement direction, its outlet is difficult to accurately align with the mold inlet. Therefore, bolts with opposing threaded ends are installed on both sides of the slider to adjust the position of the refraction assembly. However, installing bolts on both sides of the slider occupies more space. Based on this, a further improvement is made: a threaded block is fixedly connected to the upper end of the slide plate; a push block is fixedly connected to the side of the slider facing the threaded block; the push block has a U-shaped limiting groove with its opening facing upwards; a recessed U-shaped step is provided at the end of the limiting groove near the slider; the head of the drive bolt is engaged in the U-shaped step, with its threaded end facing outwards, and is threadedly connected to the threaded block. Since the injection assembly also needs height adjustment, the limiting groove and the U-shaped step provide adjustment space for the drive bolt's height. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a structural diagram of the front support;

[0023] Figure 2 This is a top view of the front support;

[0024] Figure 3 yes Figure 2 Sectional view of AA;

[0025] Figure 4 yes Figure 2 Sectional view of BB;

[0026] Figure 5 This is a structural schematic diagram of the rear support;

[0027] Figure 6 This is a top view of the rear support;

[0028] Figure 7 yes Figure 6 Sectional view of CC;

[0029] Figure 8 yes Figure 6 Sectional view of DD;

[0030] Figure 9 This is the main view of the injection component when it is in operation;

[0031] Figure 10 This is a top view of the injection unit in operation;

[0032] Figure 11 This is a top view of the injection unit away from the plasticizing unit;

[0033] Figure 12 This is a top view of the injection assembly after the inlet end has been rotated;

[0034] Figure 13 This is a top view of the injection-molded assembly when the screw is removed.

[0035] Figure 14 This is a schematic diagram of the installation structure of the drive bolt;

[0036] In the diagram: 1. Injection assembly; 2. Front support; 3. Rear support; 4. Slider; 5. Rolling bearing; 6. Front shaft; 7. Support plate; 8. Rear shaft; 9. Rotary bearing; 11. Plasticizing assembly; 12. Screw; 13. Linear guide; 21. Slide plate; 22. Connecting shaft; 23. First lubricating plate; 24. Adjusting bolt; 25. Locking bolt; 31. Notch; 32. Second lubricating plate; 33. Top plate; 41. U-shaped groove; 42. Groove; 211. Baffle; 212. Limiting bolt; 213. Threaded block; 214. Push block; 215. Limiting groove; 216. U-shaped step; 217. Drive bolt. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0038] like Figure 9As shown, this utility model discloses an injection molding machine with a rotatable injection assembly, including a frame, on which an injection assembly 1 is mounted. A plasticizing assembly 11 is disposed at one end of the injection assembly 1 near the fixed mold plate, and a motor-driven screw 12 is disposed inside the plasticizing assembly 11. Plastic particles are conveyed towards the fixed mold plate through the screw 12 and are also heated and melted into a liquid by a heater inside the plasticizing assembly 11.

[0039] A front support 2 is installed at the lower front end (near the fixed template) of the injection assembly 1, and a rear support 3 is installed at the rear end. Two symmetrically arranged linear guides, parallel to the axis of the screw 12 along their length, are mounted on the frame. The lower ends of both the front support 2 and the rear support 3 are fixedly mounted on the sliders of the linear guides. This allows the injection assembly to move closer to or further away from the fixed template.

[0040] A horizontally arranged sliding plate 21 is provided on the top of the front support 2, and a slider 4 is snapped onto the sliding plate 21. The specific snapping structure is as follows: Figure 1-4 As shown, both sides of the slider 4 are connected to L-shaped connecting plates. Each connecting plate consists of a vertical part and a horizontal part. The vertical part is fixedly connected to the slider 4, while the horizontal part is opposite and has a gap between it and the lower end of the slider 4, thus forming a U-shaped groove 41 with opposite openings between the slider 4 and the connecting plate. The U-shaped groove 41 engages with both sides of the slide plate 21, limiting the slider 4 and preventing it from falling off. A connecting shaft 22 extends downwards from the upper wall of the U-shaped groove 41, and a rolling bearing 5 (deep groove ball bearing) is installed at the lower end of the connecting shaft 22. The rolling bearing 5 is rolled against the side wall of the slide plate 21, allowing the slider 4 to slide along the slide plate 21 in a direction perpendicular to the movement direction of the injection assembly 1. This arrangement, with the rolling bearings 5 ​​positioned on opposite sides of the slide plate 21, also serves to limit the movement of the slider 4, making its movement more stable.

[0041] A vertically arranged rotating bearing 9, which is an oil-impregnated bearing, is installed on the slider 4. The rotating bearing runs through the upper and lower sides of the slider 4, and its lower end is provided with a protruding retaining plate that engages with a retaining groove at the lower end of the slider 4 to achieve installation limitation. The front rotating shaft 6 is inserted into the rotating bearing 9 from bottom to top using a half-threaded bolt. The light column of the front rotating shaft 6 is inserted into the rotating bearing 9 and is connected to the rotating bearing 9 with an interference fit; the screw at the end of the front rotating shaft 6 is threadedly connected to the injection assembly 1, thereby enabling the outlet part of the injection assembly 1 to rotate.

[0042] Two symmetrically arranged grooves 42 are also provided on the lower end face of the slider 4. The first lubricating plate 23 is installed in the groove 42 and is fixed by bolts. The lower end face of the first lubricating plate 23 contacts the upper end face of the slide plate 21, so that there is a gap between the lower end face of the slider 4 and the upper end face of the slide plate 21. The first lubricating plate 23 is a graphite copper sheet, which plays a lubricating role and facilitates the movement of the slider 4.

[0043] Because the injection component 1 is heavy and has a large inertia, it is easy to slide off the slide plate 21 and difficult to slide to the set position. Therefore, the following design is made: a baffle 211 is provided at one end of the slide plate 21, and a limit bolt 212 is threadedly connected to the other end; the head of the limit bolt 212 protrudes upward from the slide plate 21, and its position is configured such that when the inlet of the injection component 1 is accurately inserted into the template inlet, the limit bolt 212 is close to the slider and there is a gap between them. With this setting, when the screw 12 needs to be disassembled, the moving slider 4 can be blocked by the baffle 211, preventing it from falling off the slide plate 21; since the limit bolt 212 is difficult to accurately limit the slider 4, the position of the limit bolt 212 is set so that when the injection component 1 is reset, it first touches the limit bolt 212 to stop, and then it can be pulled back a small distance.

[0044] In the event of assembly errors, the outlet of injection component 1 may be lower than the inlet of the fixed mold, preventing the raw material from accurately entering the fixed mold. Therefore, the following design is implemented: an adjusting bolt 24 is threaded onto the slide plate 21, with its threaded end facing upwards and abutting against the lower end face of the slider 4. Thus, by tightening the adjusting bolt 24, the inlet of injection component 1 can be raised. The adjusting bolt 24 also has an axially arranged through hole; a locking bolt 25 passes through the through hole and is threadedly connected to the slider 4, thereby improving the positional stability of injection component 1. When the screw of injection component 1 needs to be replaced, the locking bolt 25 is first removed, and then the adjusting bolt 24 is tightened so that the threaded end of the adjusting bolt 24 is lower than the upper end face of the slide plate, preventing obstruction of the rotation of injection component 1.

[0045] A threaded block 213 is fixedly connected to the upper end of the slide plate 21; a push block 214 is fixedly connected to the side of the slider 4 opposite to the threaded block 213; such as Figure 14 As shown, the push block 214 has a U-shaped, upward-facing limiting groove 215; a recessed U-shaped step 216 is provided at one end of the limiting groove 215 near the slider; the head of the drive bolt 217 is engaged in the U-shaped step 216, with its threaded end facing outward, and is threadedly connected to the threaded block 213. Since the injection assembly 1 also requires height adjustment, the limiting groove 215 and the U-shaped step 216 provide adjustment space for the height of the drive bolt 217. The threaded end of the drive bolt 217, and the portion protruding outward from the threaded block 213, is cut into a hexagon, making it easy to tighten the drive bolt 217 with a wrench. A locking nut is also provided on the outer side of the threaded block 213, which is threadedly connected to the drive bolt 217, thereby improving the positional stability of the drive bolt 217.

[0046] like Figure 5-8As shown, a horizontally arranged top plate 33 is provided on the top of the rear support 3, and a rotatably connected support plate 7 is provided on the top plate 33. The support plate 7 is fixedly connected to the rear end of the injection assembly 1. The specific installation structure of the support plate 7 is as follows: a vertically arranged rotating bearing 9 is installed at the center of the top plate 33. The rotating bearing 9 is an oil-impregnated bearing. The rotating bearing 9 passes through the upper and lower sides of the top plate 33, and its lower end is provided with a protruding retaining plate, which is engaged in the retaining groove at the lower end of the top plate 33 to achieve installation limitation. The rear rotating shaft 8 is inserted into the rotating bearing 9 from bottom to top using a half-threaded bolt. The light column of the rear rotating shaft 8 is inserted into the rotating bearing 9 and is interference-fitted with the rotating bearing 9; the screw at the end of the rear rotating shaft 8 is threadedly connected to the support plate 7, thereby enabling the other end of the injection assembly 1 to rotate. In other embodiments, the support plate 7 and the injection assembly 1 can be integrated into a single unit.

[0047] The top plate 33 is provided with a notch 31; a second lubricating sheet 32 ​​is engaged in the notch 31; the second lubricating sheet 32 ​​is a graphite copper sheet. With this arrangement, the upper end face of the second lubricating sheet 32 ​​is connected to the lower end face of the support plate 7, and there is a gap between the top plate 33 and the support plate 7, so that the second lubricating sheet 32 ​​can play a lubricating role and facilitate the rotation of the injection assembly 1.

[0048] When the screw 12 in injection assembly 1 needs to be replaced, such as Figure 10-13 As shown, first move the injection assembly 1 to detach it from and move it away from the fixed template. Then rotate the outlet portion of the injection assembly 1. During rotation, the slider 4 moves accordingly, causing the outlet end of the injection assembly 1 to deviate from the fixed template and point towards the outer area of ​​the fixed template. This way, the screw 12 will not be obstructed by the fixed template when pulled out of the injection assembly 1. Therefore, when replacing the screw 12, this invention eliminates the need for disassembling and assembling the injection assembly 1, provides sufficient operating space, and is simple and convenient to operate.

[0049] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An injection molding machine with a rotatable injection assembly, comprising an injection assembly (1), wherein a front support (2) and a rear support (3) are respectively provided on both sides of its lower end, characterized in that: A slider (4) is installed on the upper end of the front support (2); the slider (4) is rolledly connected to the front support (2) through a rolling bearing (5), so that the slider (4) can move horizontally and its moving direction is perpendicular to the moving direction of the injection assembly (1). Rotary bearings (9) are provided on both the slider (4) and the rear support (3); The front and rear ends of the lower side of the injection assembly (1) are respectively provided with vertically arranged front rotating shaft (6) and rear rotating shaft (8); the front rotating shaft (6) and rear rotating shaft (8) are inserted into the rotating bearing (9); The injection assembly (1) is provided with a plasticizing assembly (11) at one end near the fixed template, and a motor-driven screw (12) is provided inside the plasticizing assembly (11); The screw (12) is deviated from the fixed template by moving horizontally and rotating the injection assembly (1) near the fixed template.

2. The injection molding machine with a rotatable injection component according to claim 1, characterized in that: Both the front shaft (6) and the rear shaft (8) are half-threaded bolts, which extend upward through the rotating bearing (9); The light columns of the front rotating shaft (6) and the rear rotating shaft (8) are inserted into the rotating bearing (9) by an interference fit, and the threaded column is fixedly connected to the injection assembly (1).

3. The injection molding machine with a rotatable injection component according to claim 1, characterized in that: The top of the front support (2) is provided with a horizontally arranged sliding plate (21); The slider (4) is provided with U-shaped grooves (41) on both sides, with their openings facing horizontally and arranged opposite each other; the U-shaped grooves (41) engage with the side of the slide plate (21).

4. The injection molding machine with a rotatable injection component according to claim 3, characterized in that: The upper wall of the U-shaped groove (41) leads downwards to a vertically arranged connecting shaft (22); The rolling bearing (5) is mounted on the connecting shaft (22) and is in rolling connection with the side of the sliding plate (21).

5. The injection molding machine with a rotatable injection component according to claim 4, characterized in that: The lower end of the slider (4) is provided with a groove (42); A first lubricating sheet (23) with lubricating function is installed in the groove (42); The first lubricating plate (23) is connected to the sliding plate (21); A gap is provided between the lower end face of the slider (4) and the upper end face of the slide plate (21).

6. The injection molding machine with a rotatable injection component according to claim 5, characterized in that: The slide plate (21) is also threaded with an adjusting bolt (24), the threaded end of which faces upward and abuts against the lower end face of the slider (4) for adjusting the height of the slider (4).

7. The injection molding machine with a rotatable injection component according to claim 6, characterized in that: The adjusting bolt (24) is provided with an axially arranged through hole; The locking bolt (25) passes through the through hole and is threadedly connected to the slider (4).

8. The injection molding machine with a rotatable injection component according to claim 1, characterized in that: The top of the rear support (3) is provided with a notch (31); A second lubricating sheet (32) with a lubricating function is engaged in the recess (31); The upper end face of the second lubricating sheet (32) is connected to the lower end face of the injection assembly (1); A gap is provided between the lower end face of the injection assembly (1) and the upper end face of the rear support (3).

9. The injection molding machine with a rotatable injection component according to claim 3, characterized in that: One end of the slide plate (21) is provided with a baffle (211), and the other end is threadedly connected with a limit bolt (212); The head of the limiting bolt (212) protrudes upward from the slide plate (21), and its position is configured such that when the inlet of the injection assembly (1) is accurately inserted into the template inlet, the limiting bolt (212) is close to the slider (4) and there is a gap between the limiting bolt (212) and the slider (4).

10. An injection molding machine with a rotatable injection assembly according to claim 3, characterized in that: The upper end of the slide plate (21) is fixedly connected to a threaded block (213); A push block (214) is fixedly connected to the side of the slider (4) facing the threaded block (213); The push block (214) has a U-shaped limiting groove (215) with the opening facing upward; The limiting groove (215) is provided with a recessed U-shaped step (216) at one end near the slider (4); The head of the drive bolt (217) is engaged in the U-shaped step (216), with its threaded end facing outward and threadedly connected to the threaded block (213).

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