A mold closing device for blow molding

Abstract

The utility model relates to a kind of mould closing devices for blow molding production, its characteristics are: first end plate, middle plate and second end plate are sequentially and vertically set in the top of bottom flat plate;Four support guide shafts are located in left and right sides respectively, four support guide shafts are connected with two end plates, and are slidably connected with middle plate;Each front and rear fixed mounting has shaft support seat on the position of bottom flat plate upper end close to left and right sides, and the support guide shaft of left and right sides lower part is movably installed on the two shaft support seats of corresponding side along axial direction;Forming grinding tool is formed by two grinding blocks with matched die cavity, and two grinding blocks are oppositely installed on the side of middle plate and the side of first end plate;Mould closing drive is fixed on second end plate, and its power output end is drivingly connected with middle plate;Synchronous mechanism includes gear, first rack and second rack;First rack is fixedly connected with middle plate, and second rack is fixedly connected with second end plate.The device can realize the synchronous movement of two molds, and ensure the accuracy of mould closing position.

Description

Technical Field

[0001] This utility model belongs to the technical field of blow molding production equipment, specifically relating to a mold closing device for blow molding production. Background Technology

[0002] Blow molding is an important processing method for thermoplastics, used to process thin molds and hollow products such as bottles and barrels. In various blow molding production equipment, the mold clamping device is a key structure ensuring the product is successfully blow molded. The mold clamping device generally includes two mold blocks. Depending on the product shape, semi-cavities are set on opposite sides of the two mold blocks. When the two mold blocks contact each other, a complete mold cavity is formed. The product is formed by injecting thin-walled material into the mold cavity, blowing it with an air system, and cooling it through built-in cooling channels on the mold blocks.

[0003] Existing mold closing devices consist of a combination of a moving mold and a fixed mold, or a combination of two moving molds. The combination of a moving mold and a fixed mold is a single-mold movement method, while the combination of two moving molds is a dual-mold movement method. Both types of mold closing devices require smooth mold closing movement and accurate mold closing position. Existing mold closing devices need further improvement in terms of mold closing movement control and the accuracy of mold closing position. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by proposing a mold closing device for blow molding production equipment that enables accurate mold closing at a set position, achieves good mold closing quality, and is easy to control.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0006] A mold clamping device for blow molding production includes a bottom plate, a first end plate, a second end plate, an intermediate plate, a molding die, a mold clamping drive component, a synchronization mechanism, and four support guide shafts;

[0007] The first end plate, the middle plate, and the second end plate are arranged in parallel and vertical order above the bottom plate. The four support guide shafts are located on the left and right sides respectively, and the two support guide shafts on the same side are arranged vertically. The four support guide shafts are fixedly connected to the two end plates and are slidably connected to the middle plate along the axial direction. Shaft support seats are fixedly installed at the front and back of the bottom plate near the left and right sides. The support guide shafts located at the lower part of the left and right sides are movably installed on the two shaft support seats on the corresponding sides along the axial direction.

[0008] The molding die consists of two die blocks with mating cavities arranged opposite each other. The two die blocks are installed opposite each other on the side of the intermediate plate and the side of the first end plate. When the two die blocks come into contact, a complete molding cavity is formed inside them.

[0009] The mold closing drive is a linear motion output type drive. The mold closing drive is fixedly installed on the second end plate, and the power output end of the mold closing drive is driven to the side of the intermediate plate opposite to the mold block.

[0010] The synchronization mechanism adopts a transmission mechanism in which two racks mesh on both sides of a gear, including a gear, a first rack, and a second rack; the first rack is fixedly connected to the middle plate, and the second rack is fixedly connected to the second end plate; the gear is rotatably mounted above the bottom plate around its center; the movement direction of the two racks is parallel to the axis of the four supporting guide shafts.

[0011] Furthermore, the mold closing drive component is a mold closing cylinder; a cylinder mounting hole is provided on the second end plate, the mold closing cylinder is installed in the cylinder mounting hole, and the flange portion of the mold closing cylinder is fixedly connected to the second end plate by screws.

[0012] Furthermore, a pipe support is fixed at the upper end of the second end plate, and the two oil pipes of the mold closing cylinder are clamped on the pipe support.

[0013] Furthermore, the gear is rotatably mounted on the gear shaft via bearings, the gear shaft is fixed to the gear seat, the gear seat is fixedly mounted on the upper end of the bottom plate, and the gear seat is located between the middle plate and the second end plate. On the gear seat, rack insertion holes are provided on both sides of the gear shaft. One end of the first rack is fixedly connected to the side of the middle plate away from the mold block above it, and the other end of the first rack is inserted into the rack insertion hole on one side and meshes with one side of the gear. One end of the second rack is fixedly connected to the second end plate, and the other end of the second rack is inserted into the rack insertion hole on the other side and meshes with the other side of the gear.

[0014] Furthermore, a pull rod type electronic ruler is installed on the bottom plate via a ruler bracket. The setting direction of the pull rod type electronic ruler is parallel to the support guide shaft. A connecting frame is fixedly installed on the side of the middle plate, and the pull rod end of the pull rod type electronic ruler is fixedly connected to the connecting frame.

[0015] The advantages and positive effects of this utility model are as follows:

[0016] 1. This mold closing device uses two upper and two lower support guide shafts to guide and support the opening and closing of the two mold blocks, ensuring the smoothness of the opening and closing movement and achieving better mold closing quality, which helps to ensure the blow molding quality of the product.

[0017] 2. This mold closing mechanism drives one mold closing module to move quickly in the middle plate, while the first end plate drives another mold closing module and the second end plate to move in the opposite direction. This realizes the mold opening and closing control through a single power source, which simplifies the mechanism and facilitates control.

[0018] This mold-closing structure uses a synchronous mechanism consisting of gears and double racks to ensure the consistency of the movement displacement of the two mold blocks, thereby ensuring the accuracy and consistency of the mold-closing position during the production process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the mold clamping device for blow molding production according to this utility model;

[0020] Figure 2 This is a top view of the mold clamping device for blow molding production according to this utility model;

[0021] Figure 3 This is a side view of the mold clamping device for blow molding production according to this utility model. Detailed Implementation

[0022] The structure of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0023] Please refer to a mold clamping device for blow molding production. Figures 1-3 Its practical features include: a bottom plate 1, a first end plate 8, a second end plate 4, an intermediate plate 6, a forming mold 7, a mold closing drive component, a synchronization mechanism, and four supporting guide shafts 5.

[0024] The base plate is the foundation component, and the first end plate, the second end plate, and the middle plate are all vertical plates. From one end to the other, the first end plate, the middle plate, and the second end plate are arranged parallel and perpendicularly above the base plate.

[0025] Shaft through holes are provided at the top and bottom positions near the left and right ends of the first end plate, the top and bottom positions near the left and right ends of the middle plate, and the top and bottom positions near the left and right ends of the second end plate. The four shaft through holes on the first end plate, the four shaft through holes on the middle plate, and the four shaft through holes on the second end plate are all aligned. The four supporting guide shafts are distributed and installed within the four sets of corresponding shaft through holes. The four supporting shafts are fixedly connected to the first and second end plates, and the four supporting shafts are slidably connected to the middle plate via linear bearings. Shaft support seats 11 are fixedly installed front and rear on the upper end of the bottom plate near the left and right sides. The supporting guide shafts located at the lower part of the left and right sides are axially movable and mounted on the two shaft support seats on the corresponding sides.

[0026] The molding die consists of two die blocks with mating cavities arranged opposite each other. The two die blocks are mounted opposite each other on the sides of the intermediate plate and the first end plate. When the two die blocks come into contact, a complete molding cavity is formed inside them.

[0027] The mold-closing drive is a linear motion output type drive, which can be a hydraulic cylinder, electric push rod, or other structural components. In this utility model, a mold-closing hydraulic cylinder 2 is preferred. The mold-closing drive is fixedly installed on the second end plate. The power output end of the mold-closing drive is connected to the side of the intermediate plate opposite to the mold block, thereby driving the intermediate plate and the first end plate to move relative to each other to achieve mold closing, or to move towards each other to achieve mold opening. To facilitate the installation of the mold-closing hydraulic cylinder and reduce the overall volume of the mold-closing device, a hydraulic cylinder mounting hole is provided on the second end plate. The mold-closing hydraulic cylinder is installed in the hydraulic cylinder mounting hole, and the flange portion of the external part of the mold-closing hydraulic cylinder is fixedly connected to the second end plate with screws. In addition, to facilitate the fixing of the hydraulic cylinder's inlet and outlet oil pipes, a pipe bracket is fixed to the upper end of the second end plate, and the two oil pipes of the mold-closing hydraulic cylinder are clamped on the pipe bracket 3.

[0028] To ensure accurate and consistent mold closing positions, the aforementioned synchronization mechanism is also provided in this invention. The synchronization mechanism employs a transmission mechanism where two racks mesh on both sides of a gear, including a gear 13, a first rack 15, and a second rack 12. The synchronization mechanism is integrally positioned above the base plate. The gear is rotatably mounted on a gear shaft via bearings. The gear shaft is fixed to a gear seat 14, which is fixedly mounted on the upper end of the base plate, positioned between the intermediate plate and the second end plate. Rack insertion holes are provided on both sides of the gear seat where the gear shaft is mounted. One end of the first rack is fixedly connected to the side of the intermediate plate away from the mold block, and the other end of the first rack passes through the rack insertion hole on one side and meshes with one side of the gear. One end of the second rack is fixedly connected to the second end plate, and the other end of the second rack passes through the rack insertion hole on the other side and meshes with the other side of the gear. The movement direction of the two racks is parallel to the axial direction of the four supporting guide shafts. This synchronization mechanism ensures the consistency of the movement displacement of the two mold blocks during mold closing and opening, thereby achieving the accuracy and consistency of the mold closing position and ensuring accurate alignment with the upper unloading die head when this mold closing device is applied to blow molding production equipment.

[0029] To achieve accurate detection of mold opening and closing movement, thereby facilitating control of the mold closing drive component's travel stroke via the blow molding production equipment's control system, a pull rod type electronic ruler 10 is installed on the bottom plate via a ruler bracket. The pull rod type electronic ruler is set in a direction parallel to the support guide shaft. A connecting frame 9 is fixedly installed on the side of the intermediate plate. The pull rod end of the pull rod type electronic ruler is fixedly connected to the connecting frame. The pull rod type electronic ruler enables synchronous real-time detection of mold closing displacement and mold opening displacement.

[0030] In addition to the main technical features mentioned above, in order to reduce the overall weight of the mold clamping device, multiple weight-reducing holes are provided on the first end plate, the second end plate, and the intermediate plate.

[0031] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A mold clamping device for blow molding production, characterized in that: It includes a bottom plate, a first end plate, a second end plate, an intermediate plate, a forming mold, a mold closing drive component, a synchronization mechanism, and four supporting guide shafts; The first end plate, the middle plate, and the second end plate are arranged in parallel and vertical order above the bottom plate. The four support guide shafts are located on the left and right sides respectively, and the two support guide shafts on the same side are arranged vertically. The four support guide shafts are fixedly connected to the two end plates and are slidably connected to the middle plate along the axial direction. Shaft support seats are fixedly installed at the front and back of the bottom plate near the left and right sides. The support guide shafts located at the lower part of the left and right sides are movably installed on the two shaft support seats on the corresponding sides along the axial direction. The molding die consists of two die blocks with mating cavities arranged opposite each other. The two die blocks are installed opposite each other on the side of the intermediate plate and the side of the first end plate. When the two die blocks come into contact, a complete molding cavity is formed inside them. The mold closing drive is a linear motion output type drive. The mold closing drive is fixedly installed on the second end plate, and the power output end of the mold closing drive is driven to the side of the intermediate plate opposite to the mold block. The synchronization mechanism adopts a transmission mechanism in which two racks mesh on both sides of a gear, including a gear, a first rack, and a second rack; the first rack is fixedly connected to the middle plate, and the second rack is fixedly connected to the second end plate; the gear is rotatably mounted above the bottom plate around its center; the movement direction of the two racks is parallel to the axis of the four supporting guide shafts.

2. The mold clamping device for blow molding production according to claim 1, characterized in that: The mold closing drive component is a mold closing cylinder; a cylinder mounting hole is provided on the second end plate, and the mold closing cylinder is installed in the cylinder mounting hole. The flange portion of the mold closing cylinder is fixedly connected to the second end plate by screws.

3. The mold clamping device for blow molding production according to claim 2, characterized in that: A pipe support is fixed at the upper end of the second end plate, and the two oil pipes of the mold closing cylinder are clamped on the pipe support.

4. The mold clamping device for blow molding production according to claim 1, characterized in that: The gear is rotatably mounted on the gear shaft via bearings. The gear shaft is fixed to the gear seat, which is fixedly mounted on the upper end of the bottom plate. The gear seat is positioned between the middle plate and the second end plate. Rack insertion holes are provided on both sides of the gear seat where the gear shaft is mounted. One end of the first rack is fixedly connected to the side of the middle plate away from the mold block on it, and the other end of the first rack passes through the rack insertion hole on one side and meshes with one side of the gear. One end of the second rack is fixedly connected to the second end plate, and the other end of the second rack passes through the rack insertion hole on the other side and meshes with the other side of the gear.

5. The mold clamping device for blow molding production according to claim 1, characterized in that: A pull rod type electronic ruler is installed on the bottom plate via a ruler bracket. The setting direction of the pull rod type electronic ruler is parallel to the support guide shaft. A connecting frame is fixedly installed on the side of the middle plate, and the pull rod end of the pull rod type electronic ruler is fixedly connected to the connecting frame.

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