A quick mold changing mechanism of injection molding machine for plastic pipe production

Abstract

The utility model discloses a kind of injection molding machine quick die changing mechanism for plastic pipe production, to solve in traditional die replacement and fixed mode, there is long time-consuming in die changing process, the stability of die fixed is highly dependent on artificial tightening degree, and uneven tightening force is easily caused by artificial operation Problem.Its technical scheme points are: a kind of injection molding machine quick die changing mechanism for plastic pipe production, including die holder and the die of installation on die holder, the installation side of die holder is equipped with the containing cavity of through both ends, containing cavity and the installation side of die are slidably connected, installation cavity is also opened in die holder, one-way screw rod is rotatably connected in installation cavity, the axial extension direction of one-way screw rod is perpendicular to the opening direction of containing cavity.The utility model discloses a kind of injection molding machine quick die changing mechanism for plastic pipe production, and this quick die changing mechanism realizes the quick positioning and locking of die, both guarantee the stability after die installation, greatly shorten installation time, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe production technology, and more specifically, it relates to a quick mold change mechanism for an injection molding machine used in plastic pipe production. Background Technology

[0002] In the field of plastic pipe production, plastic pipes have become a widely used packaging material in many industries due to their advantages such as low cost, corrosion resistance, and ease of processing. Mass production of plastic pipes is usually achieved using injection molding equipment. The production process involves heating the plastic raw material to a molten state, then injecting it into a mold cavity, and after cooling and solidification, forming a pipe that meets specific shape requirements.

[0003] Because plastic tube injection molded parts come in a variety of shapes and specifications, injection molding machines need to change to match the molds when producing injection molded parts of different shapes. In order to meet diverse production needs, companies change molds frequently.

[0004] In traditional mold replacement and fixing methods, bolt tightening is widely used due to its mature technology, simple operation, and low difficulty. However, bolt tightening requires manual operation one by one, and the mold replacement process is time-consuming. Although simple, it is tedious and causes long equipment downtime, affecting production efficiency. On the other hand, the stability of mold fixing is highly dependent on the degree of manual tightening. Manual operation is prone to uneven tightening force, which can lead to problems such as loosening and displacement of the mold during production, affecting the molding quality of plastic pipes. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a quick mold changing mechanism for injection molding machines used in plastic pipe production. This quick mold changing mechanism enables rapid positioning and locking of the mold, ensuring the stability of the mold after installation and effectively preventing the problem of the mold affecting the molding quality of plastic pipes due to loosening or displacement during production. It also greatly shortens the installation time, reduces equipment downtime, improves production efficiency, and meets the demand for quick mold changing in large-scale plastic pipe production.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quick mold changing mechanism for an injection molding machine used in plastic pipe production, comprising a mold base and a mold mounted on the mold base. The mold base has a through-hole cavity on its mounting side, which slides into the mounting side of the mold. The mold base also has an installation cavity, in which a one-way lead screw is rotatably connected. The axial extension direction of the one-way lead screw is perpendicular to the opening direction of the cavity. A first motor is mounted on the mold base, and the output shaft of the first motor drives one end of the one-way lead screw. The connection includes a movable seat sleeved on the unidirectional lead screw via a lead screw nut, and a bidirectional lead screw rotatably connected to the movable seat. The axial extension direction of the bidirectional lead screw is consistent with the opening direction of the receiving cavity. One end of the bidirectional lead screw is connected to a second motor that drives its rotation. The two ends of the bidirectional lead screw are symmetrically sleeved with movable blocks via lead screw nuts. Each of the two movable blocks is provided with a locking block. The locking block has an overall U-shaped structure. A through groove for the locking block to move is opened between the mounting cavity and the receiving cavity. An L-shaped locking groove for the locking block to be inserted is correspondingly opened in the mounting side of the mold.

[0007] The present invention is further configured such that: a movable slide rail is provided on the movable seat, and a fixed slide rail is provided on the inner wall of the mounting cavity, and the movable slide rail is located within the fixed slide rail for sliding engagement.

[0008] The present invention is further configured such that: a slide rod parallel to the bidirectional lead screw is slidably passed through both of the two moving blocks, and the two ends of the slide rod are fixedly connected to the moving base.

[0009] The present invention is further configured such that: limit blocks are symmetrically arranged on both sides of the mold, and a limit groove is correspondingly opened on the inner wall of the receiving cavity for the limit blocks to slide.

[0010] The present invention is further configured such that: a guide slope is provided on the end of the card block away from the moving block, which abuts against the inner wall of the card slot.

[0011] The present invention is further configured such that: the mold base is provided with a stop block at both ends of the receiving cavity, the mold base is provided with a slot for inserting the stop block, the stop block is inserted into the mold base, and a magnetic suction piece for adsorbing the stop block is provided in the slot.

[0012] In summary, this utility model has the following beneficial effects:

[0013] Compared to the traditional method of manually tightening bolts, this quick mold change mechanism enables rapid positioning and locking of the mold, ensuring the stability of the mold after installation and effectively preventing the problem of the mold loosening or shifting during production that affects the molding quality of plastic pipes. It also greatly shortens the installation time, reduces equipment downtime, improves production efficiency, and meets the demand for quick mold change in the large-scale production of plastic pipes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the mold changing mechanism of this utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0016] Figure 3 for Figure 2 A cross-sectional structural diagram.

[0017] In the diagram: 1. Mold base; 2. Mold; 3. Receiving cavity; 4. Mounting cavity; 5. One-way lead screw; 6. Moving seat; 7. Two-way lead screw; 8. Moving block; 9. Locking block; 10. Through groove; 11. Locking groove; 12. Moving slide rail; 13. Fixed slide rail; 14. Slide rod; 15. Limiting block; 16. Limiting groove; 17. Guide slope; 18. Block; 19. Magnetic suction piece. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] Reference Figures 1-3A quick mold changing mechanism for an injection molding machine used in plastic pipe production includes a mold base 1 and a mold 2 mounted on the mold base 1. The mold base 1 is mounted on the injection molding machine. There are two sets of mold base 1 and mold 2 on the injection molding machine, namely a fixed mold and a fixed mold base group and a moving mold and a moving mold base group. The matching of the shapes of the fixed mold and the moving mold to produce plastic pipes is a mature existing technology and will not be described in detail here. In this application, the installation method of the two sets of mold base 1 and mold 2 is the same. Therefore, the attached drawings only show the relevant structure of the installation of one set of mold base 1 and mold 2.

[0023] The mounting side of the mold base 1 has a through-hole cavity 3, which slides with the mounting side of the mold 2. The mold base 1 also has a mounting cavity 4, and a one-way screw 5 is rotatably connected in the mounting cavity 4. The axial extension direction of the one-way screw 5 is perpendicular to the opening direction of the mounting cavity 3. A first motor (not shown in the figure) is fixed on the mold base 1. The output shaft of the first motor is connected to one end of the one-way screw 5. A movable seat 6 is sleeved on the one-way screw 5 through a screw nut. A two-way screw 7 is rotatably connected on the movable seat 6. The axial extension direction of the two-way screw 7 is consistent with the opening direction of the mounting cavity 3. A second motor that drives the rotation of the two-way screw 7 is connected to one end of the two-way screw 7. Movable blocks 8 are symmetrically sleeved on both ends of the two-way screw 7 through screw nuts. Each movable block 8 is fixed with a locking block 9. The locking block 9 has a U-shaped structure. A through groove 10 for the locking block 9 to move is opened between the mounting cavity 4 and the mounting cavity 3. An L-shaped slot 11 for the locking block 9 to be inserted is opened in the mounting side of the mold 2.

[0024] In this embodiment, for ease of description, the opening direction of the receiving cavity 3 is named the Y direction, and the axial extension direction of the one-way lead screw 5 is named the Z direction, which is consistent with the closing direction of the two sets of molds 2.

[0025] Additionally, a movable slide rail 12 is fixedly provided on the movable seat 6, and a fixed slide rail 13 is fixedly provided on the inner wall of the mounting cavity 4. The movable slide rail 12 is slidably engaged within the fixed slide rail 13. When the first motor drives the one-way screw 5 to rotate, and the movable seat 6 moves along the one-way screw 5, the movable slide rail 12 slides within the fixed slide rail 13, providing guidance for the movement of the movable seat 6. This ensures that the movable seat 6 can move stably and accurately along the axial direction of the one-way screw 5 without any deviation or shaking, thereby ensuring that the locking block 9 accurately enters the locking slot 11 of the mold 2.

[0026] Two movable blocks 8 are slidably connected to a slide rod 14 parallel to the bidirectional lead screw 7. The two ends of the slide rod 14 are fixedly connected to the movable seat 6. When the second motor drives the bidirectional lead screw 7 to rotate, and the two movable blocks 8 move along the bidirectional lead screw 7 under the action of the lead screw nut, the slide rod 14 guides and limits the movement of the movable blocks 8, so that the movable blocks 8 can only move in a straight line along the axis of the bidirectional lead screw 7, avoiding the situation of deviating around the bidirectional lead screw 7.

[0027] Limiting blocks 15 are symmetrically fixed on both sides of the mold 2. The inner wall of the receiving cavity 3 is provided with limiting grooves 16 for the limiting blocks 15 to slide. During the process of placing the mold 2 into the receiving cavity 3, the limiting blocks 15 slide along the limiting grooves 16, which increases the contact area between the mold 2 and the mold base 1. At the same time, the limiting is further increased in the Z direction, which increases the connection between the mold 2 and the mold base 1.

[0028] The end of the locking block 9 away from the moving block 8 is provided with a guide slope 17 that abuts against the inner wall of the slot 11. Due to the presence of the guide slope 17, as the locking block 9 continues to move, the guide slope 17 will guide the end of the locking block 9 away from the moving block 8 to smoothly enter the slot 11, making the locking block 9 more smoothly locked into the slot 11 and reducing the jamming phenomenon between the locking block 9 and the slot 11.

[0029] The mold base 1 has a stop block 18 at both ends of the receiving cavity 3. The mold base 1 has a slot for inserting the stop block 18. The stop block 18 is inserted into the mold base 1. The slot is fixed with a magnetic suction piece 19 for adsorbing the stop block 18. When the mold 2 is placed into the receiving cavity 3, the stop block 18 at one end is removed. The presence of the stop block 18 at the other end limits the sliding degree of the mold 2. When the end of the mold 2 touches the stop block 18, it is placed in place. The stop block 18 is installed in the slot by magnetic attraction, making it very convenient to install and remove the stop block 18.

[0030] The quick mold change mechanism for injection molding machines used in plastic pipe production, as described in this application, is installed as follows:

[0031] First, align the mold 2 with the receiving cavity 3 on the mold base 1 and place it in. Since the receiving cavity 3 is open from front to back, the mold 2 can be placed from either side of the mold base 1, making assembly and disassembly more flexible.

[0032] The first motor is started, and its output shaft drives the one-way lead screw 5 to rotate. According to the lead screw drive principle, the moving seat 6 moves axially along the one-way lead screw 5 via the lead screw nut, thereby driving the two-way lead screw 7, the moving block 8, and the locking block 9 to move as a whole within the mounting cavity 4 towards the mold 2. The locking block 9 enters the locking slot 11 on the mold 2 through the through slot 10 until the inner side of the locking block 9 abuts against the inner wall of the mounting cavity 4. At this point, the locking block 9 reaches the preset position in the Z-direction.

[0033] Start the second motor, which drives the bidirectional lead screw 7 to rotate. Under the action of the lead screw nut, the two moving blocks 8 move synchronously along the bidirectional lead screw 7 in a direction away from each other until the end of the locking block 9 away from the moving block 8 (Y-direction end) is completely locked into the slot 11.

[0034] At this time, the mold 2 is first limited in the X direction by the cavity 3, and then locked in the Y direction by the two locking blocks 9, so that it can no longer move freely in the Y direction. At the same time, since the locking blocks 9 are U-shaped, their structural characteristics make the mold 2 subject to a locking force close to the mold base 1 in the Z direction, thereby achieving a firm positioning of the mold 2 in three directions.

[0035] Compared to the traditional method of manually tightening bolts, this quick mold change mechanism enables rapid positioning and locking of mold 2, ensuring the stability of mold 2 after installation and effectively preventing the problem of mold 2 loosening or shifting during production, which would affect the molding quality of plastic pipes. It also greatly shortens the installation time, reduces equipment downtime, improves production efficiency, and meets the demand for quick mold change in the large-scale production of plastic pipes.

[0036] The first and second motors of this invention are both electrically connected to the controller to achieve coordinated operation. The controller's control circuit can be easily programmed by those skilled in the art, and the power supply is also common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A quick mold change mechanism for an injection molding machine used in plastic pipe production, comprising a mold base (1) and a mold (2) mounted on the mold base (1), characterized in that: The mold base (1) has a through-hole cavity (3) on its mounting side, which slides into the mounting side of the mold (2). The mold base (1) also has a mounting cavity (4), in which a one-way lead screw (5) is rotatably connected. The axial extension direction of the one-way lead screw (5) is perpendicular to the opening direction of the cavity (3). A first motor is mounted on the mold base (1), and the output shaft of the first motor is connected to one end of the one-way lead screw (5). A movable seat (6) is sleeved on the one-way lead screw (5) via a lead screw nut. The movable seat (6) is rotatably connected to... There is a bidirectional lead screw (7), the axial extension direction of the bidirectional lead screw (7) is consistent with the opening direction of the receiving cavity (3), one end of the bidirectional lead screw (7) is connected to a second motor that drives its rotation, and the two ends of the bidirectional lead screw (7) are symmetrically sleeved with moving blocks (8) through lead screw nuts. Each of the two moving blocks (8) is provided with a locking block (9), the locking block (9) is U-shaped in shape, a through groove (10) for the locking block (9) to move is opened between the mounting cavity (4) and the receiving cavity (3), and an L-shaped slot (11) for the locking block (9) to be inserted is correspondingly opened in the mounting side of the mold (2).

2. The quick mold change mechanism for an injection molding machine for producing plastic pipes according to claim 1, characterized in that: The movable seat (6) is provided with a movable slide rail (12), and the inner wall of the mounting cavity (4) is provided with a fixed slide rail (13). The movable slide rail (12) is located in the fixed slide rail (13) and slides within it.

3. The quick mold change mechanism for an injection molding machine for producing plastic pipes according to claim 1, characterized in that: The two movable blocks (8) are slidably connected to a slide rod (14) parallel to the bidirectional lead screw (7), and the two ends of the slide rod (14) are fixedly connected to the movable seat (6).

4. The quick mold change mechanism for an injection molding machine for producing plastic pipes according to claim 1, characterized in that: The mold (2) is symmetrically provided with limiting blocks (15) on both sides, and the inner wall of the receiving cavity (3) is provided with a limiting groove (16) for the limiting blocks (15) to slide.

5. The quick mold change mechanism for an injection molding machine for producing plastic pipes according to claim 1, characterized in that: The card block (9) is provided with a guide slope (17) that abuts against the inner wall of the card slot (11) at the end away from the moving block (8).

6. The quick mold change mechanism for an injection molding machine for producing plastic pipes according to claim 1, characterized in that: The mold base (1) has a stop block (18) at both ends of the receiving cavity (3). The mold base (1) has a slot for inserting the stop block (18). The stop block (18) is inserted into the mold base (1), and a magnetic suction piece (19) for adsorbing the stop block (18) is provided in the slot.

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