Mold for plastic pipe production

Abstract

The utility model relates to the technical field of plastic pipe production, in particular to a mold for plastic pipe production. The mold for plastic pipe production comprises a support, an air cylinder, a mold I and a mold II, the air cylinder is installed at the top of the support, the mold I is fixedly connected to a telescopic rod of the air cylinder and divided into a square plate and a plurality of cylinders, the mold II is installed at the top of the support, and the mold II is fixedly connected to the telescopic rod of the air cylinder. A plurality of longitudinally-distributed circular grooves are formed in the mold II, the mold I is aligned with the mold II, so that the cylinders of the mold I can be inserted into the circular grooves of the mold II, and cavities are formed between the outer walls of the cylinders and the circular grooves and used for containing plastic liquid. And by arranging a moving rod and a reset spring, the reset spring completely restores, the moving rod moves rightwards to block the mold II, then the interior of the mold II is in a closed state, external dust and other impurities are prevented from entering the mold II, and the interior of the mold II does not need to be manually cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe production, in particular to a mold for plastic pipe production. Background Art

[0002] Plastic pipes are manufactured from plastic. As a key component of chemical building materials, they offer advantages such as minimal water loss, energy and material conservation, ecological protection, and convenient construction. They are widely used in building water supply and drainage, urban water supply and drainage, and gas pipes. Mass production of plastic pipes requires specialized molds to inject the liquid plastic into a mold.

[0003] The patent authorization announcement number is CN212978971U, which discloses a mold for pipe production, including a fixed base plate, a heat-insulating base fixedly provided in the middle of the top of the fixed base plate, a mold barrel fixedly connected to the inside of the heat-insulating base, and a cavity formed at the top of the mold barrel. Although the above patent can eject the pipe from between the partition column and the mold barrel by setting a reduction motor, a turntable, a U-shaped push plate and a material baffle, it still has some shortcomings in actual use. For example, when the mold is idle, dust and other impurities in the outside air will fall into the cavity between the partition column and the mold barrel, causing the partition column and the mold barrel wall to be stained with dust and other impurities, which will then cause dust and other impurities to mix into the thermoplastic material during the later production of the pipe, resulting in dirty spots on the surface of the formed pipe. Therefore, in order to ensure the production quality of the pipe, the cavity between the partition column and the mold barrel must be cleaned, but the cavity space is small, making cleaning difficult.

[0004] Therefore, a mold for producing plastic pipes is particularly needed to solve the problems existing in the prior art. Utility Model Content

[0005] In order to overcome the shortcomings of existing patents that the cavity between the partition column and the mold barrel must be cleaned to ensure the production quality of the pipe, and the cavity space is small, which makes cleaning difficult, the utility model provides a mold for plastic pipe production.

[0006] The utility model is realized by the following technical means: a mold for producing plastic pipes, including a bracket, a cylinder, a mold I, a mold II, an injection molding machine and an injection molding pipe, a cylinder is installed on the top of the bracket, and a mold I is fixedly connected to the telescopic rod of the cylinder. The mold I is divided into a square plate and a plurality of cylinders, and a mold II is installed on the top of the bracket. A plurality of longitudinally distributed circular grooves are opened inside the mold II. The mold I is aligned with the mold II so that the cylinder of the mold I can be inserted into the circular groove of the mold II, and a cavity is formed between the outer wall of the cylinder and the circular groove for accommodating plastic liquid. The injection molding machine is installed on the top of the bracket. The injection molding machine is covered on the outside of mold II. A feeding port is provided on the injection molding machine for adding materials. Several injection molding tubes distributed longitudinally are connected between the injection molding machine and mold II. It also includes a sleeve, a moving rod and a reset spring. Several sleeves are fixedly connected to the left part of mold II. The moving rod is slidably connected to the inside of the circular groove of mold II, and the left end of the moving rod passes through the outside of the sleeve, so that the rightmost end of the moving rod is placed inside the sleeve when the moving rod moves to the left. A reset spring for auxiliary reset is connected between the moving rod and mold II. By controlling the extension of the telescopic rod of the cylinder, mold I moves to the left, squeezing the moving rod to the left to open mold II.

[0007] As an improvement to the above solution, the round block provided at the right end of the moving rod is made of sealing rubber, and the size of the round block is the same as the circular surface of the cylinder of mold I, so that the cylinder of mold I squeezes the moving rod when it moves to the left.

[0008] As an improvement to the above scheme, it also includes a sliding rod, a stripping plate and a stopper. The right side of the middle part of the mold I is slidably connected to a sliding rod distributed front and back. A stripping plate is fixedly connected between the ends of the two sliding rods away from the cylinder. The cylinder of the mold I passes through the stripping plate. The top of the bracket is fixedly connected to a stopper distributed front and back. The right side of the stripping plate contacts the left side of the stopper, so that the stopper limits the stripping plate.

[0009] As an improvement to the above scheme, it also includes a water tank, a water pump, and a water circulation pipe. The water tank is installed on the upper part of the bracket, and a water inlet for adding water is opened on the upper part of the water tank. A water pump is installed at the bottom of the water tank, and a water pump is provided on the water pump. The water pump end of the water pump is close to the bottom of the water tank, so that the water pump pumps out most of the water inside the water tank. The outside of the mold II is connected to a water circulation pipe in the shape of a basket. The end of the water circulation pipe penetrates into the interior of the water tank and is connected to the front of the water pump. The water inside the water tank is transported to the inside of the water circulation pipe through the operation of the water pump.

[0010] As an improvement to the above solution, a plurality of air outlet holes for heat dissipation are provided on the top of the mold II.

[0011] As an improvement to the above solution, a controller is further included. The front of the injection molding machine is equipped with the controller, which is electrically connected to the cylinder, the injection molding machine and the water pump.

[0012] From the above description of the structure of the present invention, it can be seen that the design starting point, concept and advantages of the present invention are: 1. By providing a movable rod and a return spring, the return spring completely returns to its original state, causing the movable rod to move to the right to block mold II, thereby sealing the interior of mold II and preventing foreign matter such as dust from entering mold II. Manual cleaning of the interior of mold II is unnecessary.

[0013] 2. By setting the sliding rod, stripping plate and stopper, the stripping plate moves to the right and contacts the stopper and is held, and mold I continues to move to the right. The stripping plate blocks the plastic pipe on mold I, and then the plastic pipe is removed from mold I, thereby achieving the effect of automatic demoulding.

[0014] 3. By setting up a water tank, a water pump and a water circulation pipe, the water in the water tank is transported to the water circulation pipe when the water pump is running. The cold water inside the water circulation pipe fully absorbs the heat emitted by the plastic liquid in mold II, thereby accelerating the cooling speed of the plastic liquid, making the plastic liquid quickly solidify into plastic pipes, and improving the production efficiency of plastic pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the stripper plate, mold II and moving rod of the utility model.

[0017] Figure 3 It is a three-dimensional structural diagram of the cylinder, mold I and sliding rod components of the utility model.

[0018] Figure 4 It is a three-dimensional cross-sectional structural diagram of the movable rod, return spring and injection molding machine components of the utility model.

[0019] Figure 5 It is a three-dimensional cross-sectional structural diagram of the water tank, water pump, water circulation pipeline and other components of the utility model.

[0020] The numbers in the figure are: 1. Bracket, 2. Cylinder, 3. Mold I, 4. Slide rod, 5. Stripper plate, 6. Mold II, 601, Sleeve, 7. Moving rod, 8. Return spring, 9. Injection molding machine, 10. Injection molding tube, 11. Air outlet, 12. Water tank, 13. Water inlet, 14. Water pump, 15. Water circulation pipe, 16. Block, 17. Controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example: A mold for producing plastic pipes, see Figure 1-Figure 5 As shown, it includes a bracket 1, a cylinder 2, a mold I3, a mold II6, an injection molding machine 9 and an injection molding tube 10. The cylinder 2 is connected to the top right position of the bracket 1 by bolts. The mold I3 is connected to the telescopic rod of the cylinder 2 by welding. The mold I3 is divided into a square plate and a plurality of cylinders. The mold II6 is connected to the top left position of the bracket 1 by bolts. A plurality of longitudinally distributed circular grooves are provided inside the mold II6. The mold I3 is aligned with the mold II6 so that the cylinder of the mold I3 can be inserted into the circular groove of the mold II6, and a cavity is formed between the outer wall of the cylinder and the circular groove for accommodating plastic liquid. The injection molding machine 9 is connected to the top left position of the bracket 1 by bolts. The injection molding machine 9 is covered on the outside of the mold II6. The injection molding machine 9 is provided with a feed port for adding materials. The injection molding machine 9 and the mold II6 are connected by a longitudinal Several injection molding tubes 10 are distributed in the mold Ⅱ 6. Several air vents 11 are provided on the right side of the top of the mold Ⅱ 6 for heat dissipation. It also includes a sleeve 601, a moving rod 7 and a reset spring 8. Several sleeves 601 are connected to the left side of the mold Ⅱ 6 by welding. The moving rod 7 is slidably connected to the inside of the circular groove of the mold Ⅱ 6, and the left end of the moving rod 7 passes through the outside of the sleeve 601, so that when the moving rod 7 moves to the left, the rightmost end is placed inside the sleeve 601. The round block on the right end of the moving rod 7 is made of sealing rubber material, and the size of the round block is the same as the size of the circular surface of the mold Ⅰ 3 cylinder, so that when the cylinder of the mold Ⅰ 3 moves to the left, the moving rod 7 is squeezed. A reset spring 8 for auxiliary reset is connected between the moving rod 7 and the mold Ⅱ 6. By controlling the extension of the telescopic rod of the cylinder 2, the mold Ⅰ 3 moves to the left, squeezing the moving rod 7 and moving to the left to open the mold Ⅱ 6.

[0023] See Figure 1-Figure 3 As shown, it also includes a slide rod 4, a stripper plate 5 and a stopper 16. The right side of the middle part of the mold Ⅰ3 is slidably connected to the slide rod 4 distributed front and back. The two slide rods 4 are connected to the stripper plate 5 at one end away from the cylinder 2 by welding. The cylinder of the mold Ⅰ3 passes through the stripper plate 5. The top of the bracket 1 is connected to the stopper 16 distributed front and back by welding. The right side of the stripper plate 5 contacts the left side of the stopper 16, so that the stopper 16 limits the stripper plate 5.

[0024] See Figure 1 、 Figure 2 and Figure 5As shown, it also includes a water tank 12, a water pump 14, and a water circulation pipe 15. The water tank 12 is connected to the left side of the upper part of the bracket 1 by means of bolts. A water inlet 13 for adding water is opened at the left side of the upper part of the water tank 12. The bottom of the water tank 12 is connected to the water pump 14 by means of bolts. A water pump 14 is provided on the water pump 14. The water pump end of the water pump pipe is close to the bottom of the water tank 12, so that the water pump 14 pumps away most of the water inside the water tank 12. The outside of the mold II 6 is connected to a water circulation pipe 15 in the shape of a basket. The end of the water circulation pipe 15 penetrates into the interior of the water tank 12 and is connected to the front of the water pump 14. The water inside the water tank 12 is transported to the inside of the water circulation pipe 15 through the operation of the water pump 14.

[0025] See Figure 1 、 Figure 2 and Figure 4 As shown, a controller 17 is also included. The controller 17 is connected to the upper front side of the injection molding machine 9 by bolts. The controller 17 is electrically connected to the cylinder 2, the injection molding machine 9 and the water pump 14.

[0026] First, the staff will place the collection frame at the bottom of the bracket 1, so that the collection frame is placed in the middle position below the mold I3 and mold II6, and then add an appropriate amount of plastic liquid into the injection molding machine 9. Then, the cylinder 2 will be turned on by the controller 17 to control the extension of the telescopic rod of the cylinder 2, thereby making the mold I3, the slide rod 4 and the stripper plate 5 move to the left. The stripper plate 5 contacts the right side of the mold II6 and is supported. The mold I3 continues to move, squeezing the moving rod 7 to move to the left to open the mold II6. The reset spring 8 is then compressed. When the moving rod 7 moves to the appropriate position and its rightmost end is placed inside the sleeve 601, the staff will close the cylinder 2. At this time, the mold The cylinder of Ⅰ3 is completely placed in the circular groove of mold Ⅱ6 to form a cavity, and then the injection molding machine 9 is turned on through the controller 17, and the injection molding machine 9 is controlled to transport the plastic liquid to the injection molding tube 10. The plastic liquid in the injection molding tube 10 flows into the cavity between mold Ⅰ and mold Ⅱ6. After the cavity is filled with plastic liquid, the injection molding machine 9 is turned off. The staff adds an appropriate amount of cold water into the water tank 12 from the water inlet 13, and then turns on the water pump 14 through the controller 17. The water pump 14 runs to transport the water in the water tank 12 to the water circulation pipe 15. After the water circulation pipe 15 is filled with cold water, the water pump 14 is turned off. The cold water inside the water circulation pipe 15 is fully The heat emitted by the plastic liquid in mold II 6 is absorbed, thereby accelerating the cooling speed of the plastic liquid, causing the plastic liquid to quickly solidify into a plastic pipe. At the same time, the heat is discharged from the mold II 6 through the air outlet 11. After the plastic liquid solidifies, the staff restarts the cylinder 2 and controls the telescopic rod of the cylinder 2 to shorten, thereby causing the mold I 3, the slide rod 4 and the stripper plate 5 to move to the right. The mold I 3 drives the formed plastic pipe to move. At the same time, the reset spring 8 gradually returns to its original state, causing the moving rod 7 to gradually move to the right to push the plastic pipe, thereby assisting the mold I 3 to drive the plastic pipe to move. The stripper plate 5 moves to the right and contacts the stopper 16 and is held. Mold I3 continues to move to the right, and the stripper plate 5 blocks the plastic tube on mold I3, thereby removing the plastic tube from mold I3, thereby achieving the effect of automatic demoulding. The removed plastic tube falls into the collection box, and the staff repeats the above steps to continue producing plastic tubes. After production is completed, the reset spring 8 completely returns to its original state, causing the moving rod 7 to move to the right to block mold II6, thereby sealing the interior of mold II6, preventing external dust and other impurities from entering mold II6. There is no need to manually clean the interior of mold II6. When the surface of mold I3 is stained with dust and other impurities, the staff quickly wipes mold I3 with a cleaning tool.

[0027] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A mold for producing plastic pipes, characterized in that: The invention comprises a support (1), a cylinder (2), a mold I (3), a mold II (6), an injection molding machine (9) and an injection molding tube (10), wherein the cylinder (2) is installed on the top of the support (1), and the mold I (3) is fixedly connected to the telescopic rod of the cylinder (2), and the mold I (3) is divided into a square plate and a plurality of cylinders. The top of the support (1) is installed with a mold II (6), and a plurality of longitudinally distributed circular grooves are opened inside the mold II (6). The mold I (3) is aligned with the mold II (6) so that the cylinder of the mold I (3) can be inserted into the circular groove of the mold II (6), and a cavity is formed between the outer wall of the cylinder and the circular groove for containing plastic liquid. An injection molding machine (9) is installed, and a feed port is provided on the injection molding machine (9) for adding materials. A plurality of injection molding tubes (10) distributed longitudinally are connected between the injection molding machine (9) and the mold II (6). The mold II (6) also includes a sleeve (601), a moving rod (7) and a reset spring (8). The left part of the mold II (6) is fixedly connected to the plurality of sleeves (601). The moving rod (7) is slidably connected to the inside of the circular groove of the mold II (6), and the left end of the moving rod (7) passes through the outside of the sleeve (601), so that the rightmost end of the moving rod (7) is placed inside the sleeve (601) when the moving rod (7) moves to the left. A reset spring (8) for assisting reset is connected between the moving rod (7) and the mold II (6).

2. A mold for producing plastic pipes according to claim 1, characterized in that: The round block provided at the right end of the moving rod (7) is made of sealing rubber, and the size of the round block is the same as the size of the circular surface of the cylinder of the mold I (3), so that the cylinder of the mold I (3) squeezes the moving rod (7) when it moves to the left.

3. A mold for producing plastic pipes according to claim 2, characterized in that: The mold Ⅰ (3) further comprises a slide bar (4), a stripper plate (5) and a stopper (16). The right side of the middle portion of the mold Ⅰ (3) is slidably connected to a slide bar (4) distributed front and back. A stripper plate (5) is fixedly connected between the ends of the two slide bars (4) away from the cylinder (2). The cylinder of the mold Ⅰ (3) passes through the stripper plate (5). The top of the bracket (1) is fixedly connected to a stopper (16) distributed front and back. The right side of the stripper plate (5) contacts the left side of the stopper (16), so that the stopper (16) limits the stripper plate (5).

4. A mold for producing plastic pipes according to claim 3, characterized in that: The invention also includes a water tank (12), a water pump (14), and a water circulation pipe (15). The water tank (12) is installed on the upper part of the bracket (1). The upper part of the water tank (12) is provided with a water inlet (13) for adding water. The water pump (14) is installed at the bottom of the water tank (12). The water pump (14) is provided with a water pumping pipe so that the water pump (14) can pump water from the water tank (12). The outside of the mold II (6) is connected to the water circulation pipe (15) in the shape of a basket. The end of the water circulation pipe (15) penetrates into the interior of the water tank (12) and is connected to the front of the water pump (14).

5. A mold for producing plastic pipes according to claim 4, characterized in that: The mold II (6) also includes a plurality of air outlet holes (11) on the top thereof for heat dissipation.

6. A mold for producing plastic pipes according to claim 5, characterized in that: The device further comprises a controller (17), which is installed at the front of the injection molding machine (9). The controller (17) is electrically connected to the cylinder (2), the injection molding machine (9) and the water pump (14).

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