Sealing mechanism for blow molding machine

Abstract

The utility model relates to the technical field of packaging, and discloses a sealing mechanism for a blow molding machine, which is characterized in that the sealing mechanism is driven by a single air cylinder by arranging the air cylinder, an air bag, a sliding block, a connecting rod and other structures, the air cylinder transmits pressure air to the air bag to change the position of an upper rod, and the position of the upper rod moves to change the rotating angle of the connecting rod. When the connecting rod rotates by an angle, the sliding block of the lower rod is driven to move in the opposite direction, so that a blow molding product is sealed, sealing operation of a single air cylinder is achieved, linkage operation of the upper rod and the lower rod is achieved by arranging the air cylinder, the sliding block, the connecting rod and other structures, and sealing operation is achieved by connecting the upper rod and the lower rod with the connecting rod. When the upper rod and the lower rod move at will, the other rod slides in the opposite direction, synchronism is improved, and performance excess is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the packaging technical field especially relates to a sealing mechanism for blow molding machine. BACKGROUND

[0002] Blow molding is also called hollow blow molding, a kind of rapidly developing plastic processing method. Tubular plastic parison of thermoplastic resin is placed in split mold while hot (or heated to softening state), compressed air is introduced into the parison after the mold is closed, so that the plastic parison is blown and tightly adheres to the inner wall of the mold, and various hollow products are obtained after cooling and demolding.

[0003] Blow molding machine is a kind of plastic processing machine. After liquid plastic is sprayed out, the wind force blown out by the machine is used to blow the plastic body to a certain shape of mold cavity, so as to make products. This kind of machine is called blow molding machine.

[0004] Sealing of plastic is needed during production. In the prior art, two oppositely arranged connecting plates and respectively connected cylinders are included. The cylinders respectively push the connected connecting plates to move, and the two connecting plates are pressed together to realize sealing operation. However, in this technology, two cylinders drive two connecting plates, and the synchronization is not high, which cannot guarantee the sealing effect and sealing speed, and the use of two cylinders increases the overall weight of the machine and the performance surplus. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a sealing mechanism for blow molding machine, which has the advantages of saving performance and high synchronization, and solves the problems raised in the above background technology.

[0006] The utility model provides the following technical scheme: a sealing mechanism for blow molding machine, including the bottom plate, the top of bottom plate is fixedly installed with support column, the top of support column is fixedly installed with top plate, the top of top plate is fixedly installed with box, the inside of box is equipped with function cavity, the both sides of box are equipped with rectangular hole, the number of rectangular hole is 4, it is symmetrically equipped at the both sides of box, the inner wall of function cavity is swingly installed with bearing, and is installed in the both sides inner walls of function cavity, the inside of function cavity rotates and is connected with the shaft, the outer ring of shaft is fixedly connected with connecting rod on the side of bearing, the surface of connecting rod is equipped with straight slot, the inner wall of function cavity is fixedly installed with fixed block on the both sides of bearing, the inside of box is slidably installed with upper rod and lower rod in rectangular hole.

[0007] Preferably, one end of the upper rod is fixedly provided with a clamping block, one side of the clamping block is provided with a slot, and an air bag is fixedly arranged in the slot.

[0008] Preferably, one side of the fixed block is provided with a hole slot, the hole slot is half the same as the shape of the rectangular hole, and the upper rod and the lower rod are located in the hole slot of the fixed block.

[0009] Preferably, the upper rod is located in the upper rectangular hole, the lower rod is located in the lower rectangular hole, and a circular hole is formed in the side surface of the upper rod and the lower rod.

[0010] Preferably, a pin column is fixedly arranged on the surface of the sliding block, and the pin column is located in the straight slot.

[0011] Preferably, a slot is formed in one side of the sealing strip, and the slots are linearly and uniformly distributed on one side of the sealing strip.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The sealing mechanism for the blow molding machine, which realizes single-cylinder driving of the sealing mechanism by arranging the cylinder, the air bag, the sliding block and the connecting rod, etc., the cylinder transmits pressure air to the air bag, the position of the upper rod changes, the position of the upper rod moves, the rotating angle of the connecting rod changes, the sliding block of the lower rod moves in the opposite direction when the connecting rod rotates, thereby sealing the blow molding product, and single-cylinder sealing operation is realized.

[0014] 2. The sealing mechanism for the blow molding machine, which realizes linkage operation of the upper rod and the lower rod by arranging the cylinder, the sliding block and the connecting rod, etc., the upper rod and the lower rod are connected with the connecting rod, so that one of the rods slides in the opposite direction when the other rod moves, thereby improving synchronism and avoiding performance surplus. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the whole structure of the utility model;

[0016] Figure 2 It is a sectional view of the box structure of the utility model;

[0017] Figure 3 Another perspective view of the box structure of the utility model;

[0018] Figure 4 The schematic diagram of the clamping strip structure of the utility model;

[0019] Figure 5 The exploded view of part structure of the utility model.

[0020] In the figure: 1, bottom plate; 2, support column; 3, top plate; 4, box; 5, functional cavity; 6, rectangular hole; 7, bearing; 8, rotating shaft; 9, connecting rod; 10, straight slot; 11, fixed block; 12, upper rod; 13, lower rod; 14, clamping block; 15, air bag; 16, sliding block; 17, clamping strip; 18, extrusion plate; 19, sealing strip; 20, blocking block; 21, stress plate; 22, air cylinder. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-5 A sealing mechanism for blow molding machine, the top of bottom plate 1 is fixedly installed with support column 2, the top of support column 2 is fixedly installed with top plate 3, the top of top plate 3 is fixedly installed with box 4, the inside of box 4 is provided with functional cavity 5, the both sides of box 4 are provided with rectangular hole 6, the number of rectangular hole 6 is four, and rectangular hole 6 is symmetrically provided on the both sides of box 4, the inner wall of functional cavity 5 is movably installed with bearing 7, and is installed on the both sides of the inner wall of functional cavity 5, the inside of functional cavity 5 is rotatably sleeved with rotating shaft 8, the outer ring of rotating shaft 8 is fixedly sleeved with connecting rod 9 on the side of bearing 7, the surface of connecting rod 9 is provided with straight slot 10, the inner wall of functional cavity 5 is fixedly installed with fixed block 11 on the both sides of bearing 7, the side of fixed block 11 is provided with hole slot, and the shape of hole slot is half same with rectangular hole 6;

[0023] The upper rod 12 and the lower rod 13 are slidably installed in the inner part of the box body 4 in the rectangular hole 6, are located in the hole slot of the fixed block 11, are provided with a round hole on the side surface, are provided with a positioning hole for the sliding block 16, are disassembled and maintained by disassembling the positioning and mounting screws, the position of the sliding block 16 is changed, the upper rod 12 is located in the upper rectangular hole 6, the lower rod 13 is located in the lower rectangular hole 6, one end of the upper rod 12 is fixedly installed with the clamping block 14, the clamping block 14 is provided with a slot hole on one side, and the air bag 15 is fixedly installed in the slot hole.

[0024] The lower rod 13 is fixedly connected with the blocking block 20 at one end, the blocking block 20 is used for avoiding that the lower rod 13 slides into the inner part of the box body 4 when the machine is damaged, the upper rod 12 and the lower rod 13 are fixedly connected with the sliding block 16 at the middle part of the outer circle, the sliding block 16 is fixedly installed with the pin column on the surface, the pin column is located in the straight slot 10, the pin column on the surface of the upper sliding block 16 is located in the upper straight slot 10, the pin column on the surface of the lower sliding block 16 is located in the lower straight slot 10, the position of any one sliding block 16 is changed, and the horizontal position of the other sliding block 16 is affected, the other end of the upper rod 12 and the lower rod 13 is fixedly connected with the clamping strip 17, the clamping strip 17 is provided with a circular groove at the inner circle corner, and the clamping strip 17 is connected with the upper rod 12 or the lower rod 13 to avoid clamping angle jamming and low precision.

[0025] The clamping strip 17 is fixedly connected with the extrusion plate 18 away from the upper rod 12, the clamping strip 17 is fixedly installed with the stress plate 21 away from the lower rod 13, the extrusion plate 18 and the stress plate 21 are fixedly connected with the sealing strip 19 on one side, the sealing strip 19 is provided with a strip groove on one side, the strip groove is linearly and uniformly distributed on one side of the sealing strip 19, the shape of the strip groove is changed according to the requirement of the user, the box body 4 is fixedly installed with the air cylinder 22 on one side, the air cylinder 22 is provided with a connecting hole on one side, a pipeline is connected between the connecting hole and the air bag 15, the air cylinder 22 outputs air to the air bag 15 through the pipeline to control the horizontal position of the upper rod 12, the upper rod 12 moves at the same time to affect the rotation angle of the connecting rod 9 through the sliding block 16, the angle rotation of the connecting rod 9 affects the horizontal position of the lower rod 13, and the air cylinder 22 outputs pressure air to the inner part of the air bag 15 to make the two sealing strips 19 realize the opening and closing state.

[0026] Working principle: the machine is placed in the next process of the blow molding machine, using the assembly line to move the blow molded product between the sealing strips 19, the cylinder 22 inputs pressure air into the air bag 15, the upper rod 12 moves away from the box 4, once the position of the upper rod 12 changes, the slider 16 installed on the outer ring of the upper rod 12 changes the rotation angle of the connecting rod 9 through the pin column, after the angle of the connecting rod 9 changes, the lower straight slot 10 drives the lower slider 16 to move together, since the moving direction of the lower rod 13 is limited by the rectangular hole 6 and the fixed block 11, the movement of the upper rod 12 and the slider 16 becomes horizontal, through the left and right of the connecting rod 9, the upper rod 12 moves away from the box 4, the lower rod 13 is driven by the connecting rod 9 to move in the opposite direction, when the upper rod 12 and the lower rod 13 are attached together by the sealing strip 19, the sealing effect is realized;

[0027] The cylinder 22 extracts the pressure air in the air bag 15, the air bag 15 moves towards the box 4, after the rotation of the connecting rod 9, the lower rod 13 is driven to move in the opposite direction, i.e. returns to the original position, waiting for the next sealing of the blow molded product, the cylinder 22 can be set to output pressure air at a fixed time and quantity, i.e. to realize the assembly line brake production.

Claims

1. A sealing mechanism for a blow molding machine, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly installed with a support column (2), the top of the support column (2) is fixedly installed with a top plate (3), the top of the top plate (3) is fixedly installed with a box body (4), the inside of the box body (4) is provided with a function cavity (5), the two sides of the box body (4) are provided with rectangular holes (6), the number of the rectangular holes (6) is four, which are symmetrically provided on the two sides of the box body (4), the inner wall of the function cavity (5) is movably installed with a bearing (7), which is installed on the two side inner walls of the function cavity (5), the inside of the function cavity (5) is rotatably sleeved with a rotating shaft (8), the outer ring of the rotating shaft (8) is fixedly sleeved with a connecting rod (9) on one side of the bearing (7), the surface of the connecting rod (9) is provided with a straight groove (10), the inner wall of the function cavity (5) is fixedly installed with a fixed block (11) on the two sides of the bearing (7), the inside of the box body (4) is slidably installed with an upper rod (12) and a lower rod (13) in the rectangular hole (6).

2. A closure mechanism for a blow molding machine as defined in claim 1, wherein: One end of the upper rod (12) is fixedly installed with a clamping block (14), one side of the clamping block (14) is provided with a slot hole, the inside of the slot hole is fixedly installed with an air bag (15), one end of the lower rod (13) is fixedly connected with a blocking block (20), the outer ring of the lower rod (13) and the upper rod (12) is fixedly connected with a sliding block (16), the other end of the lower rod (13) and the upper rod (12) is fixedly connected with a clamping strip (17), one side of the clamping strip (17) away from the upper rod (12) is fixedly connected with a pressing plate (18), one side of the clamping strip (17) away from the lower rod (13) is fixedly installed with a stress plate (21), one side of the pressing plate (18) and the stress plate (21) is fixedly connected with a sealing strip (19), one side of the box body (4) is fixedly installed with an air cylinder (22), one side of the air cylinder (22) is provided with a connecting hole, the connecting hole and the air bag (15) are connected with a pipeline.

3. A closure mechanism for a blow molding machine as defined in claim 1, wherein: One side of the fixed block (11) is provided with a hole slot, the hole slot is half the same as the rectangular hole (6), the upper rod (12) and the lower rod (13) are located in the hole slot of the fixed block (11).

4. A closure mechanism for a blow molding machine as defined in claim 2, wherein: The upper rod (12) is located in the upper rectangular hole (6), the lower rod (13) is located in the lower rectangular hole (6), the upper rod (12) and the lower rod (13) are provided with a circular hole on the side, and the circular hole is a positioning hole for the sliding block (16).

5. A closure mechanism for a blow molding machine as defined in claim 2, wherein: The surface of the sliding block (16) is fixedly installed with a pin column, and the pin column is located in the straight groove (10), the pin column on the surface of the upper sliding block (16) is located in the upper straight groove (10), and the pin column on the surface of the lower sliding block (16) is located in the lower straight groove (10).

6. A closure mechanism for a blow molding machine as defined in claim 2, wherein: One side of the sealing strip (19) is provided with a strip slot, which is linearly and uniformly distributed on one side of the sealing strip (19), and the shape of the strip slot is selected according to the user's demand.

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