Quick exhaust structure of blowing mold

Abstract

The utility model is applicable to the technical field of blow molds, and provides a quick exhaust structure of a blow mold, which comprises a first mold seat, a first mold groove is arranged on the surface of the front end of the first mold seat, a columnar device cavity is vertically arranged at the rear end inside the first mold seat, and a bidirectional threaded rod is vertically and rotatably connected inside the device cavity. The two ends of the two-way threaded rod are in threaded connection with threaded sleeves. According to the quick exhaust structure of the blow molding mold, by arranging a bidirectional threaded rod and a rubber ring, when the quick exhaust structure is used, in the blow molding operation process, a motor drives the bidirectional threaded rod to rotate, so that threaded sleeves at the two ends of the surface of the bidirectional threaded rod are driven to move in the opposite directions, and the rubber ring is driven to move synchronously; and the outer surface of the rubber ring is in interference fit with the inner surface of the device cavity, the rubber ring is equivalent to a piston, and air in the mold cavity can be pumped out through a plurality of first exhaust holes and a plurality of second exhaust holes in the movement process of the rubber ring, so that the efficiency of blow molding operation is improved, and the practicability of the device is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blow molding molds, and particularly relates to a rapid exhaust structure for blow molding molds. Background Technique

[0002] Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. The blow molding process began to be used for the production of small bottles made of low-density polyethylene during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. The volume of hollow containers can reach several thousand liters, and some productions have adopted computer control. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. According to the method of making the parison, blow molding can be divided into extrusion blow molding and injection blow molding, and newly developed ones are multi-layer blow molding and stretch blow molding.

[0003] The blow molding process is widely used in the processing of containers such as bottles and boxes. Since there is still some air in the mold cavity inside the blow molding mold after it is closed, exhaust holes are generally opened on the mold to help exhaust. However, in order to ensure the quality of blow molding products, the diameters of these exhaust holes are generally small, and the exhaust speed is slow, which relatively affects the efficiency of blow molding operations. Content of the Utility Model

[0004] The utility model provides a rapid exhaust structure for blow molding molds, aiming to solve the problem that the exhaust holes of general blow molding molds generally have small diameters and slow exhaust speeds, which relatively affects the efficiency of blow molding operations.

[0005] The utility model is realized as follows. A rapid exhaust structure for blow molding molds includes a first mold base. A first mold groove is opened on the front end surface of the first mold base. A columnar device cavity is vertically opened at the rear end inside the first mold base. A bidirectional threaded rod is vertically rotatably connected inside the device cavity. Threaded sleeves are threadedly connected to both ends of the bidirectional threaded rod. Rubber rings are fixedly connected to the outer surfaces of the two threaded sleeves. The outer surfaces of the two rubber rings are in interference connection with the inner surface of the device cavity.

[0006] A plurality of first exhaust holes and a plurality of second exhaust holes are vertically and penetratingly opened on the front end surface inside the device cavity and between the two threaded sleeves. The other ends of the plurality of first exhaust holes and the plurality of second exhaust holes respectively penetrate to the upper and lower parts inside the first mold groove.

[0007] Preferably, an installation shell is fixedly connected to the top end of the first mold base. A motor is fixedly connected inside the installation shell. The bottom end of the output shaft of the motor rotatably penetrates the upper surface of the first mold base and is fixedly connected to one end of the bidirectional threaded rod.

[0008] Preferably, guide rods are vertically and fixedly connected to both the top and bottom inside the device cavity. Through holes adapted to the guide rods are formed through the outer surfaces of the two threaded sleeves, and the two threaded sleeves are respectively slidably connected to the outer surfaces of the two guide rods.

[0009] Preferably, sliding rods are horizontally and fixedly connected to both sides of the front surface of the first mold base, and a second mold base is slidably connected to the outer surfaces of the plurality of sliding rods.

[0010] Preferably, a second mold groove corresponding to and adapted to the first mold groove is formed on the rear surface of the second mold base.

[0011] Preferably, the volume inside the device cavity is adapted to the volume inside the cavity formed by combining the first mold groove and the second mold groove.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For a rapid exhaust structure of a blow molding mold of the present utility model, by providing a bidirectional threaded rod and a rubber ring, when the device is in use, during the blow molding operation, the motor drives the bidirectional threaded rod to rotate, thereby driving the threaded sleeves at both ends of its surface to move in opposite directions, and then driving the rubber ring to move synchronously. The outer surface of the rubber ring is in interference fit with the inner surface of the device cavity, which is equivalent to a piston. During its movement, air inside the mold cavity is extracted through a plurality of first exhaust holes and a plurality of second exhaust holes, thereby improving the efficiency of the blow molding operation and enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0015] Figure 2 is a schematic cross-sectional combined state structure diagram of the present utility model;

[0016] Figure 3 is a schematic structure diagram of the first mold base in the present utility model.

[0017] In the figure: 1 - first mold base, 2 - sliding rod, 3 - second mold base, 4 - first mold groove, 5 - second mold groove, 6 - device cavity, 7 - bidirectional threaded rod, 8 - threaded sleeve, 9 - rubber ring, 10 - first exhaust hole, 11 - second exhaust hole, 12 - mounting shell, 13 - motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the purpose, technical solution and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a rapid exhaust structure for a blow molding die, including a first mold base 1, a first mold groove 4 is opened on the front end surface of the first mold base 1, and a columnar device cavity 6 is vertically opened at the rear end inside the first mold base 1. A bidirectional threaded rod 7 is vertically rotatably connected inside the device cavity 6. Threaded sleeves 8 are threadedly connected to both ends of the bidirectional threaded rod 7. Rubber rings 9 are fixedly connected to the outer surfaces of the two threaded sleeves 8, and the outer surfaces of the two rubber rings 9 are interference-fitted to the inner surface of the device cavity 6;

[0020] A plurality of first exhaust holes 10 and a plurality of second exhaust holes 11 are opened through the front end surface inside the device cavity 6 and between the two threaded sleeves 8. The other ends of the plurality of first exhaust holes 10 and the plurality of second exhaust holes 11 respectively penetrate to the upper and lower parts inside the first mold groove 4.

[0021] An installation shell 12 is fixedly connected to the top end of the first mold base 1. A motor 13 is fixedly connected inside the installation shell 12. The bottom end of the output shaft of the motor 13 rotatably penetrates the upper surface of the first mold base 1 and is fixedly connected to one end of the bidirectional threaded rod 7.

[0022] In this embodiment, when the device is in use, during the blow molding operation, the motor 13 drives the bidirectional threaded rod 7 to rotate, thereby driving the threaded sleeves 8 at both ends of its surface to move in opposite directions, thus driving the rubber rings 9 to move synchronously. The outer surface of the rubber ring 9 is interference-fitted to the inner surface of the device cavity 6, which is equivalent to a piston. During its movement, the air inside the mold cavity will be pumped out through the plurality of first exhaust holes 10 and the plurality of second exhaust holes 11, thereby improving the efficiency of the blow molding operation and also improving the practicability of the device.

[0023] The plurality of first exhaust holes 10 are located above the plurality of second exhaust holes 11. The other ends of the plurality of first exhaust holes 10 penetrate to the upper part inside the first mold groove 4, and can quickly pump out the air above the inside of the mold cavity, while the plurality of second exhaust holes 11 penetrate to the lower part inside the first mold groove 4 and can quickly pump out the air below the inside of the mold cavity.

[0024] Furthermore, sliding rods 2 are horizontally and fixedly connected to both sides of the front end surface of the first mold base 1. A second mold base 3 is slidably connected to the outer surfaces of the plurality of sliding rods 2.

[0025] A second mold groove 5 corresponding to and adapted to the first mold groove 4 is opened on the rear end surface of the second mold base 3.

[0026] In this embodiment, after the first mold base 1 and the second mold base 3 are combined, the first mold cavity 4 and the second mold cavity 5 inside them are combined to form a mold cavity structure.

[0027] Furthermore, guide rods are vertically and fixedly connected to both the top and bottom inside the device cavity 6. Through holes adapted to the guide rods are respectively formed through the outer surfaces of the two threaded sleeves 8, and the two threaded sleeves 8 are respectively slidably connected to the outer surfaces of the two guide rods.

[0028] In this embodiment, multiple guide rods can play a role in guiding and limiting. They can prevent the threaded sleeve 8 from rotating along with the rotation of the bidirectional threaded rod 7, ensuring that it always moves vertically.

[0029] Furthermore, the volume inside the device cavity 6 is adapted to the volume inside the cavity formed by the combination of the first mold cavity 4 and the second mold cavity 5.

[0030] In this embodiment, the fact that the volume inside the device cavity 6 is adapted to the volume inside the cavity formed by the combination of the first mold cavity 4 and the second mold cavity 5 can ensure that all the gas inside the mold cavity can be pumped out without residue, guaranteeing the blow molding processing effect.

[0031] The working principle and usage process of the present utility model: After the present utility model is installed, when the device is in use, during the blow molding operation, the motor 13 drives the bidirectional threaded rod 7 to rotate, thereby driving the threaded sleeves 8 at both ends of its surface to move in opposite directions, and then driving the rubber ring 9 to move synchronously. The outer surface of the rubber ring 9 is in interference fit with the inner surface of the device cavity 6. It is equivalent to a piston. During its movement, it will extract the air inside the mold cavity through multiple first exhaust holes 10 and multiple second exhaust holes 11, thereby improving the efficiency of the blow molding operation and also enhancing the practicability of the device.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A blow mold quick exhaust structure, characterized in that: The invention comprises a first die base (1), wherein a first die groove (4) is formed on the front end surface of the first die base (1), and a columnar device cavity (6) is formed vertically on the rear end inside the first die base (1), and a bidirectional threaded rod (7) is vertically rotatably connected inside the device cavity (6), and threaded sleeves (8) are threadedly connected at both ends of the bidirectional threaded rod (7), and rubber rings (9) are fixedly connected to the outer surfaces of the two threaded sleeves (8), and the outer surfaces of the two rubber rings (9) are interference-connected to the inner surface of the device cavity (6); A plurality of first exhaust holes (10) and a plurality of second exhaust holes (11) are provided on the front end surface of the interior of the device cavity (6) and between the two threaded sleeves (8), and the other ends of the plurality of first exhaust holes (10) and the plurality of second exhaust holes (11) are respectively extended to the upper part and the lower part of the interior of the first die groove (4).

2. A blow mold quick exhaust structure according to claim 1, characterized in that: The top end of the first mold base (1) is fixedly connected to a mounting shell (12), the interior of the mounting shell (12) is fixedly connected to a motor (13), and the bottom end of the output shaft of the motor (13) rotatably passes through the upper surface of the first mold base (1) and is fixedly connected to one end of the bidirectional threaded rod (7).

3. A blow mold quick exhaust structure according to claim 1, characterized in that: The top and bottom ends of the device cavity (6) are both vertically fixedly connected to guide rods, and the outer surfaces of the two threaded sleeves (8) are each provided with through holes adapted to the guide rods, and the two threaded sleeves (8) are respectively slidably connected to the outer surfaces of the two guide rods.

4. A blow mold quick exhaust structure according to claim 1, characterized in that: Both sides of the front end surface of the first mold base (1) are transversely fixedly connected to sliding rods (2), and the outer surfaces of a plurality of the sliding rods (2) are slidably connected to the second mold base (3).

5. A blow mold quick exhaust structure as claimed in claim 4, characterized in that: A second die groove (5) corresponding to and matching the first die groove (4) is formed on the rear end surface of the second die base (3).

6. A blow mold quick exhaust structure according to claim 5, characterized in that: The volume inside the device cavity (6) is adapted to the internal volume of a cavity formed by combining the first mold cavity (4) and the second mold cavity (5).

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