Blow molding device

Abstract

The utility model discloses a blow molding device and relates to the related technical field of blow molding equipment. The device comprises a bottom plate, containing boxes, movable rods and a positioning disc, two movable grooves are fixed to each of the two long edges of the top of the bottom plate, the two movable grooves fixed to each of the two long edges of the top of the bottom plate are symmetrical along the longitudinal center line of the top of the bottom plate, and the two containing boxes symmetrical to each other are arranged at the top of the bottom plate; the tops of the sides, away from the air outlets, of the tops of the two containing boxes are movably connected with movable rods in a penetrating mode, positioning discs are arranged above the movable rods, pressing discs are fixed to the top ends of the movable rods, and pressing switches are fixed to the centers of the bottom end faces of the positioning discs. Through the arrangement of the bottom plate, the containing box, the movable rod and the positioning disc, the problems that the blow molding pressure of the blow molding device is large, plastic is tightly attached to the inner wall of a mold, flaws exist on the surface after blow molding, demolding can only be achieved through pushing of pushing equipment in the demolding process, and a packaging barrel is prone to being damaged in the demolding process are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to blow molding equipment, in particular to a blow molding device. Background Art

[0002] Blow molding mainly refers to hollow blow molding (also known as blow molding), which is a method of using gas pressure to inflate the hot melt parison closed in the mold to form a hollow product. It is a rapidly developing plastic molding method. The mold used for blow molding is only a female mold (concave mold). Compared with injection molding, the equipment cost is lower, the adaptability is stronger, the molding performance is good (such as low stress), and the products with complex undulating curves (shapes) can be molded. When blow molding container barrels, large molding devices are required for blow molding, but it still has the following disadvantages in actual use:

[0003] 1. When the blow molding device is performing blow molding, the blow molding pressure is too high during the blow molding process, which will cause the plastic to stick to the inner wall of the mold and form a blow molding gap at the position of the opening and closing mold, resulting in surface defects after blow molding and insufficient product yield;

[0004] 2. When the blow molding device is performing blow molding, high-pressure air is directly used for shaping. After shaping, demoulding is required. During the demoulding process, the blow-molded container barrel is completely embedded in the blow molding device. When demoulding, the device needs to be pushed to demould, which can easily cause damage to the container barrel during the demoulding process. Utility Model Content

[0005] The utility model aims to provide a blow molding device, which solves the problem that the blow molding device has a high blowing pressure, causing the plastic to stick to the inner wall of the mold, resulting in surface defects after blow molding, and that the device needs to be pushed to demould during demoulding, which easily causes damage to the container barrel during the demoulding process.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a blow molding device, comprising a bottom plate, a containing box, a movable rod and a positioning plate, wherein two movable grooves are fixed at two long sides of the top of the bottom plate, and the two movable grooves fixed on the two long sides of the top of the bottom plate are symmetrical along the longitudinal center line of the top of the bottom plate, and two mutually symmetrical containing boxes are arranged on the top of the bottom plate, and air outlet holes are opened at the top center and the bottom center of the containing box, and the top of the two containing boxes on one side away from the air outlet holes is movably connected with a movable rod, and a positioning plate is arranged above the movable rod, and a pressure plate is fixed on the top of the movable rod, and a pressing switch is fixed on the center of the bottom end surface of the positioning plate. When working, the movable groove is fixed thereon through the bottom plate, and the containing box is supported thereon through the movable groove, and the containing box provides a shaping effect for the container barrel when the container barrel is shaped, and the movable rod is pushed onto the positioning plate when the container barrel is blow-molded, so that the pressing switch on the positioning plate is pressed down.

[0008] Furthermore, hydraulic cylinders are fixed at the two short sides of the top of the base plate, the two hydraulic cylinders are symmetrical to each other, piston rods are movably connected in the hydraulic cylinders, and a fixed block is fixed at one end of each piston rod away from the hydraulic cylinder. The base plate drives the piston rod to move through the hydraulic cylinder, and when the piston rod moves, the containing box is pushed to move through the fixed block.

[0009] Furthermore, support bars are symmetrically fixed to the bottom of the storage box along the transverse center line, the support bars are movably connected in the movable groove, the top of the fixed block is fixed to the bottom of the storage box, and the storage box is movably connected in the movable groove through the support bars, so that the storage box is stably set on the bottom plate during work.

[0010] Furthermore, a micro air pump is fixed on one side of the two containing boxes away from each other, the input end of the micro air pump is fixedly connected to an air intake pipe, and the output end of the micro air pump is connected to the containing box. When the containing box is operated by the micro air pump, air is sucked in through the air intake pipe and then compressed and transported to the containing box.

[0011] Furthermore, a closed frame is fixed at the edge of one side of the surface of the containing box that is close to each other, and the bottom of the closed frame is open. A limiting plate is fixed in the middle of the closed frame on the side where the tops of the two containing boxes are close to each other. The limiting plate passes through the top of the containing box and is fixed, and the bottom of the limiting frame is flush with the inner top of the containing box, and the containing box is closed by the closed frame and the two containing boxes.

[0012] Furthermore, a movable hole is opened at the top of the containing box corresponding to the position of the movable rod, the movable rod is movably connected in the movable hole, connecting rods are fixed in a circular array on the bottom end surface of the positioning plate outside the pressure plate, and the bottom ends of all the connecting rods are fixed to the top of the containing box, and the containing box is movably connected to the movable rod through the movable hole.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model solves the problem that the blow molding device has high blow molding pressure, which causes the plastic to stick to the inner wall of the mold and causes surface defects after blow molding. The blow molding equipment is started, and the blow molding equipment blows air into the container barrel blank. The air in the container barrel blank increases until the container barrel is blown to fill the containing box. During this process, the air in the containing box is discharged through the air outlet, so that when working, the movable rod rises, pushing the pressure plate to rise, squeezing the push switch on the bottom of the positioning plate, starting the micro air pump and the hydraulic cylinder. After the push switch is pressed, the hydraulic cylinder drives the piston rod to retract into it, driving the two containing boxes away from each other, so that the container barrel is demolded immediately after the blow molding is completed, reducing the occurrence of surface defects.

[0015] 2. The utility model solves the problem that when the blow molding device is demolded, it is necessary to push the equipment to demold, which easily causes damage to the container barrel during the demolding process by arranging a bottom plate, a receiving box, a movable rod and a positioning plate. During the demolding process, when the push switch is pressed, the micro air pump is started, and the micro air pump presses air into the receiving box to demold the container barrel formed in the receiving box. When demolding, the high-pressure air is used, so that the container barrel can be demolded without the need for equipment to push the demolding, thereby better ensuring the integrity of the blow-molded container barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the assembly structure of a blow molding device;

[0017] Figure 2 It is a three-dimensional diagram of the bottom plate structure;

[0018] Figure 3 It is a three-dimensional diagram of the storage box structure;

[0019] Figure 4 It is a three-dimensional diagram of the movable rod structure;

[0020] Figure 5 It is a three-dimensional diagram of the positioning plate structure.

[0021] Reference numerals:

[0022] 1. Bottom plate; 101. Movable groove; 102. Hydraulic cylinder; 103. Piston rod; 104. Fixed block; 2. Accommodating box; 201. Air outlet; 202. Movable hole; 203. Limiting plate; 204. Enclosing frame; 205. Micro air pump; 206. Air inlet pipe; 207. Support bar; 3. Movable rod; 301. Pressure plate; 4. Positioning plate; 401. Connecting rod; 402. Press switch. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-5 As shown, the utility model is a blow molding device, including a bottom plate 1, a receiving box 2, a movable rod 3 and a positioning plate 4. Two movable grooves 101 are fixed at the two long sides of the top of the bottom plate 1. When the bottom plate 1 is working, the receiving box 2, the movable rod 3 and the positioning plate 4 are supported thereon. The two movable grooves 101 fixed on the two long sides of the top of the bottom plate 1 are symmetrical along the longitudinal center line of the top of the bottom plate 1. The support bars 207 are movably connected through the movable grooves 101 to increase the supporting stability of the receiving box 2. Two mutually symmetrical receiving boxes 2 are arranged on the top of the bottom plate 1. The receiving boxes 2 are used for the shaping of IBC plastic container barrels during blow molding. The top center and the bottom center of the receiving box 2 are both provided with air outlets 201. The receiving box 2 is blown through the air outlets 201. During the plastic molding process, the air in the containing box 2 is discharged, and the top of the two containing boxes 2 on one side away from the air outlet 201 is movably connected with a movable rod 3, a positioning plate 4 is arranged above the movable rod 3, a pressure plate 301 is fixed on the top of the movable rod 3, and a push switch 402 is fixed at the center of the bottom end surface of the positioning plate 4. When the movable rod 3 is blow-molded by the IBC plastic container barrel, the container barrel being formed pushes the movable rod 3 to rise. During the rising process of the movable rod 3, the pressure plate 301 is pushed up, squeezing the push switch 402 on the bottom end of the positioning plate 4, starting the micro air pump 205 and the hydraulic cylinder 102, and after the push switch 402 is pressed, the hydraulic cylinder 102 drives the piston rod 103 to retract into it, driving the two containing boxes 2 away from each other.

[0025] Among them Figure 1 , 2 As shown, hydraulic cylinders 102 are fixed at the two short sides of the top of the bottom plate 1. The two hydraulic cylinders 102 are symmetrical to each other. Piston rods 103 are movably connected in the hydraulic cylinders 102. A fixed block 104 is fixed at one end of each piston rod 103 away from the hydraulic cylinder 102. The bottom plate 1 drives the piston rod 103 to move through the hydraulic cylinder 102, drives the fixed block 104 to move, and drives the containing box 2 to move through the fixed block 104.

[0026] Among them Figure 1-3 As shown, support bars 207 are symmetrically fixed along the transverse center line at the bottom of the storage box 2, and the support bars 207 are movably connected in the movable groove 101. The top of the fixed block 104 is fixed to the bottom of the storage box 2. The storage box 2 is movably connected in the movable groove 101 through the support bars 207, thereby increasing the stability of the movement of the storage box 2.

[0027] Among them Figure 1 , 3As shown, a micro air pump 205 is fixed on one side of the two containing boxes 2 away from each other, and the input end of the micro air pump 205 is fixedly connected to an air inlet pipe 206, and the output end of the micro air pump 205 is connected to the containing box 2. When the containing box 2 is working, the micro air pump 205 sucks air through the air inlet pipe 206, compresses it, and blows it into the containing box 2, so that when working, the container barrel blow-molded in the containing box 2 begins to be demoulded.

[0028] Among them Figure 1 , 3 As shown, a closed frame 204 is fixed at the edge of the side where the surfaces of the two containing boxes 2 are close to each other, and the bottom of the closed frame 204 is open. A limiting piece 203 is fixed in the middle of the closed frame 204 on the side where the tops of the two containing boxes 2 are close to each other. The limiting piece 203 passes through the top of the containing box 2 and is fixed, and the bottom of the limiting frame is flush with the inner top of the containing box 2. The containing box 2 further increases the sealing of the gap between the two containing boxes 2 when they are combined through the closed frame 204. After the limiting pieces 203 on the tops of the two containing boxes 2 are combined with each other, a restriction on the blow molding port is provided during blow molding of the container barrel.

[0029] Among them Figure 1 , 3 As shown in Figures 4 and 5, a movable hole 202 is opened at the top of the containing box 2 corresponding to the position of the movable rod 3, the movable rod 3 is movably connected in the movable hole 202, and connecting rods 401 are fixed in a circular array on the bottom end surface of the positioning plate 4 outside the pressure plate 301, and the bottom ends of all connecting rods 401 are fixed to the top of the containing box 2, the containing box 2 is movably connected to the movable rod 3 through the movable hole 202, and the positioning plate 4 is fixed to the top of the containing box 2 through the bottom ends of the connecting rods 401, so that the positioning plate 4 is fixed to the top of the containing box 2.

[0030] The specific working principle of the utility model is as follows: when working, firstly, the blank to be blow-molded is placed on the installation device at the output end of the blow-molding equipment, so that the blank of the container barrel is arranged between the two containing boxes 2, and then the hydraulic cylinder 102 is started again, and the hydraulic cylinder 102 drives the piston rod 103 to move, drives the two containing boxes 2 to move together, and starts the blow-molding equipment. The blow-molding equipment blows air into the container barrel blank, and the air in the container barrel blank increases until the container barrel is blown to fill the containing box 2. During this process, the air in the containing box 2 is discharged through the air outlet 201, and at the same time, when the movable rod 3 is subjected to the blow-molding effect of the IBC plastic container barrel, the container barrel in the molding pushes the movable rod 3 to rise. During the rising process of the movable rod 3, the pressure plate 301 is pushed to rise, and the pressing switch 402 on the bottom end of the positioning plate 4 is squeezed, and the micro air pump 205 and the hydraulic cylinder 102 are started. After the pressing switch 402 is pressed, the hydraulic cylinder 102 drives the piston rod 103 to retract therein, and drives the two containing boxes 2 to move away from each other, and the blow-molding of the container barrel is completed.

[0031] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A blow molding device, comprising a base plate (1), a receiving box (2), a movable rod (3) and a positioning plate (4), characterized in that: Two movable grooves (101) are fixed on the two long sides of the top of the bottom plate (1); the two movable grooves (101) fixed on the two long sides of the top of the bottom plate (1) are symmetrical along the longitudinal center line of the top of the bottom plate (1); two symmetrical containing boxes (2) are arranged on the top of the bottom plate (1); air outlet holes (201) are opened at the center of the top and the center of the bottom of the containing boxes (2); a movable rod (3) is movably connected to the top of the two containing boxes (2) away from the air outlet holes (201); a positioning plate (4) is arranged above the movable rod (3); a pressure plate (301) is fixed on the top of the movable rod (3); and a push switch (402) is fixed at the center of the bottom end surface of the positioning plate (4).

2. A blow molding device according to claim 1, characterized in that: Hydraulic cylinders (102) are fixed at the two short sides of the top of the bottom plate (1), the two hydraulic cylinders (102) are symmetrical to each other, piston rods (103) are movably connected inside the hydraulic cylinders (102), and a fixing block (104) is fixed at one end of each piston rod (103) away from the hydraulic cylinder (102).

3. A blow molding device according to claim 2, characterized in that: A support bar (207) is symmetrically fixed to the bottom of the containing box (2) along the transverse center line, the support bar (207) is movably connected in the movable groove (101), and the top of the fixed block (104) is fixed to the bottom of the containing box (2).

4. A blow molding device according to claim 1, characterized in that: A micro air pump (205) is fixed on one side of the two containing boxes (2) that is away from each other, the input end of the micro air pump (205) is fixedly connected to an air inlet pipe (206), and the output end of the micro air pump (205) is connected to the containing box (2).

5. A blow molding device according to claim 1, characterized in that: A closed frame (204) is fixed at the edge of the side close to each other on the surface of the two containing boxes (2), and the bottom of the closed frame (204) is open. A limiting piece (203) is fixed in the middle of the closed frame (204) on the side close to each other at the top of the two containing boxes (2). The limiting piece (203) passes through the top of the containing box (2) and is fixed, and the bottom of the limiting frame is flush with the inner top of the containing box (2).

6. A blow molding device according to claim 1, characterized in that: A movable hole (202) is provided at the top of the containing box (2) corresponding to the position of the movable rod (3); the movable rod (3) is movably connected in the movable hole (202); connecting rods (401) are fixed in a circular array on the bottom end surface of the positioning plate (4) outside the pressure plate (301); and the bottom ends of all the connecting rods (401) are fixed to the top of the containing box (2).

Images