A bottle blowing machine mold height adjusting mechanism and its adjusting and fixing method

Abstract

The application discloses a bottle blowing machine mold height adjusting mechanism and an adjusting and fixing method thereof, which comprises an upper limiting boss arranged on the top of a mold frame shaft, a cushion block, an adjusting sleeve, a Haver block and a gasket, an inner threaded hole is arranged in the middle of the cushion block, a pressing gap is arranged on the sidewall of the cushion block, and a pressing bolt is arranged on the cushion block; the adjusting sleeve is composed of a rotating section and a connecting section; the adjusting sleeve and the cushion block are sleeved on the bottom of the mold frame shaft, the lower end of the cushion block is abutted against a mold frame support, the adjusting sleeve supports a mold opening and closing frame through a thrust bearing, the connecting section is screwed into the inner threaded hole on the cushion block, the pressing gap is reduced under the pressing of the pressing bolt, the Haver block is locked on the top of a cylindrical section of the mold frame shaft, an adjusting gap is left between the Haver block and the upper limiting boss, the gasket is sleeved in the adjusting gap, and the Haver block is limited through the thrust bearing for the mold opening and closing frame. The bottle blowing machine mold height adjusting mechanism can quickly and accurately adjust the height of a bottle blowing mold, reduces the adjusting difficulty, greatly saves the adjusting time, and the fastening mode is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of blow molding machines, and more specifically to a blow molding machine mold height adjustment mechanism. Background Technology

[0002] Blow molding machines are key equipment for producing various liquid packaging plastic empty bottles. Plastic empty bottles are made by blowing preforms. The heated preforms are sent to the blow molding mold, the sealing unit seals the bottle mouth, and the stretching unit stretches the preform while injecting high-pressure gas according to a certain process to make the preform stick to the mold wall and form an empty bottle. Each process of blow molding machine has strict requirements and high requirements for mutual cooperation. Among them, taking the preform into the mold, sealing and taking the bottle all have high requirements for the height accuracy of the blow molding mold. The blow molding mold is installed on the mold opening and closing frame. The mold opening and closing frame is usually installed on the mold frame shaft. The cylindrical section on the mold frame shaft passes vertically through the rear end of the mold opening and closing frame. The mold frame shaft is arranged vertically, and its two ends are respectively installed with the mold frame support of the blow molding machine. The traditional method of adjusting the height of blow molding mold is: (1) Adjusting by adding shims between the mold frame support and the mold opening and closing frame. This adjustment method is relatively troublesome, difficult to adjust and inefficient. (2) Another adjustment method is to tighten the round nut at the top after adjusting the height at the bottom. The disadvantage of this adjustment method is that the shaft passing through the mold shell will move upward during the tightening process of the round nut, causing the screw of the locking shaft to be subjected to shear force, which affects the service life of the screw. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a blow molding die height adjustment mechanism and its adjustment and fixing method that can quickly and accurately adjust the height of the blow molding die, reduce the difficulty of adjustment, greatly save adjustment time, and has a stable and reliable fastening method.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a blow molding die height adjustment mechanism, comprising: a die frame shaft, a die frame support, a die opening and closing frame for installing the blow molding die, an upper limit boss set on the top of the cylindrical section of the die frame shaft, a pad, an adjusting sleeve, a Haver block, and several gaskets. A vertically arranged internally threaded hole is provided in the middle of the pad, and a pressure groove extending into the internally threaded hole is provided on the side wall of the pad. A pressing bolt is provided on the upper surface of the pad, and the pressing bolt passes downward through the pressure groove and is threadedly connected to the pad. The adjusting sleeve is formed by axially connecting a rotating section and a connecting section, with the rotating section located above the connecting section, and an external thread provided on the outer side of the connecting section. The Haver block consists of two halves... The mold is formed by interlocking blocks; the gasket has a clearance notch that allows it to be fitted onto the cylindrical section of the mold frame shaft; the adjusting sleeve and the gasket are fitted onto the bottom of the cylindrical section of the mold frame shaft, with the lower end of the gasket abutting against the mold frame support; the adjusting sleeve supports the mold opening and closing frame through a thrust bearing fitted onto the mold frame shaft; the connecting section on the adjusting sleeve is screwed into the internal threaded hole on the gasket; the pressure gap is reduced under the pressure of the pressing bolt, thereby preventing the adjusting sleeve from loosening by breaking the threads in the internal threaded hole; the Haver block is interlocked onto the top of the cylindrical section of the mold frame shaft; an adjustment gap is left between the Haver block and the upper limit boss; a gasket is tightly fitted into the adjustment gap; the Haver block presses and limits the mold opening and closing frame through a thrust bearing fitted onto the mold frame shaft.

[0005] Furthermore, in the aforementioned blow molding die height adjustment mechanism, a rotating hole for driving the adjustment sleeve to rotate is provided on the rotating section.

[0006] Furthermore, in the aforementioned blow molding die height adjustment mechanism, the thickness specifications of the gasket are as follows: 0.05mm, 0.1mm, and 0.2mm.

[0007] Furthermore, in the aforementioned blow molding die height adjustment mechanism, a wrench plane is provided on both sides of the pad block.

[0008] A method for adjusting and fixing the height adjustment mechanism of a blow molding machine mold, the steps of which are as follows:

[0009] (1) The adjusting sleeve is screwed into the internal threaded hole on the pad by the connecting section on the adjusting sleeve, so that the adjusting sleeve and the pad are threadedly connected. At this time, the lower end of the adjusting sleeve does not protrude from the lower end of the pad, and the adjusting sleeve does not block the pressing bolt on the pad, so that the pressing bolt can be turned. Then, the adjusting sleeve and the pad connected together are fitted onto the bottom of the cylindrical section of the mold frame shaft. The lower end of the pad abuts against the mold frame support. A thrust bearing is fitted on the mold frame shaft between the adjusting sleeve and the mold opening and closing frame. The adjusting sleeve supports the mold opening and closing frame through the thrust bearing. The Haver block is locked to the top of the cylindrical section of the mold frame shaft. There is an adjustment gap between the Haver block and the upper limit boss. A thrust bearing is also fitted on the mold frame shaft between the Haver block and the mold opening and closing frame. The Haver block upper limit the mold opening and closing frame through the thrust bearing, so that the mold opening and closing frame cannot move upward.

[0010] (2) When adjusting the height of the blow molding die, loosen the connection between the mold opening and closing frame and the mold frame support, as well as the Haver block, so that the mold opening and closing frame can move up and down. Then, drive the adjusting sleeve to rotate in the forward direction by applying external force to the rotating section, so that the adjusting sleeve is raised until the mold opening and closing frame is raised to the required height. Then, rotate the adjusting sleeve in the reverse direction by N°, so that the adjusting sleeve moves down a small distance. Then, insert the shim into the adjustment gap until the shim can no longer be inserted. Then, rotate the adjusting sleeve in the forward direction by N°, so that the mold opening and closing frame is raised to the required height and each shim is fully pressed. Then, tighten the Haver block and tighten the pressing bolt to prevent the adjusting sleeve from loosening and rotating.

[0011] Furthermore, in the aforementioned method for adjusting and fixing the height adjustment mechanism of a blow molding machine mold, N is 20 to 40.

[0012] The advantages of this invention are: the blow molding die height adjustment mechanism can quickly and accurately adjust the height of the blow molding die, reducing the difficulty of adjustment, greatly saving adjustment time, and the fastening method is stable and reliable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation of the blow molding die in the blow molding machine of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the mold frame shaft.

[0015] Figure 3 This is a schematic diagram of the pad block structure.

[0016] Figure 4 This is a schematic diagram of the adjusting sleeve. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a blow molding die height adjustment mechanism includes: a die frame shaft 1, a die frame support 12, a die opening and closing frame 13 for mounting the blow molding die, an upper limit boss 2 machined on the top of a cylindrical section 14 of the die frame shaft 1, a pad 3, an adjusting sleeve 4, a Haver block 5, and several shims. A vertically arranged internally threaded hole 6 is provided in the middle of the pad 3. A pressure slit 7 extending into the internally threaded hole 6 is provided on the side wall of the pad 3. A pressing bolt 8 is provided on the upper surface of the pad 3, passing downward through the pressure slit 7 and threadedly connected to the pad 3. The adjusting sleeve 4 is formed by axially connecting a rotating section 9 and a connecting section 10. The rotating section 9 is located above the connecting section 10, and an external thread is provided on the outer side of the connecting section 10. A rotating hole 11 for driving the adjusting sleeve 4 to rotate is provided on the rotating section 9. In practical applications, a rotating plane can also be provided on the rotating section 9, allowing a wrench to clamp the rotating part. The plane can also drive the adjustment sleeve 4 to rotate; the Haver block 5 is formed by two half blocks locking together; the shim is provided with a clearance notch that allows the shim to be fitted onto the cylindrical section 14 of the mold frame shaft; the adjustment sleeve 4 and the shim block 3 are fitted onto the bottom of the cylindrical section 14 of the mold frame shaft 1, the lower end of the shim block 3 abuts against the mold frame support 12, the adjustment sleeve 4 supports the mold opening and closing frame 13 through the thrust bearing fitted onto the mold frame shaft 1, the connecting section 10 on the adjustment sleeve 4 is screwed into the internal threaded hole 6 on the shim block 3, the pressure gap 7 is reduced under the pressure of the pressing bolt 8, thereby preventing the adjustment sleeve 4 from loosening by destroying the thread in the internal threaded hole 6, the Haver block 5 is locked onto the top of the cylindrical section 14 of the mold frame shaft 1, there is an adjustment gap 16 between the Haver block 5 and the upper limit boss 2, the shim is tightly fitted into the adjustment gap 16, and the Haver block 5 presses and limits the mold opening and closing frame 13 through the thrust bearing fitted onto the mold frame shaft 1.

[0019] A method for adjusting and fixing the height adjustment mechanism of a blow molding machine mold, the steps of which are as follows:

[0020] (1) such as Figure 1As shown, the adjusting sleeve 4 is screwed into the internal threaded hole 6 on the pad 3 through the connecting section 10, so that the adjusting sleeve 4 and the pad 3 are threadedly connected. At this time, the lower end of the adjusting sleeve 4 does not protrude from the lower end of the pad 3, and the adjusting sleeve 4 does not block the pressing bolt 8 on the pad 3, so that the pressing bolt 8 can be turned. Then, the adjusting sleeve 4 and the pad 3 connected together are fitted onto the bottom of the cylindrical section 14 of the mold frame shaft 1. The lower end of the pad 3 abuts against the mold frame support 12. The adjusting sleeve 4 and the pad 3 are threadedly connected. A thrust bearing is installed on the mold frame shaft 1 between the opening and closing frame 13. The adjusting sleeve 4 supports the mold opening and closing frame 13 through the thrust bearing. The Haver block 5 is locked to the top of the cylindrical section 14 of the mold frame shaft 1. An adjusting gap 16 is left between the Haver block 5 and the upper limit boss 2. A thrust bearing is also installed on the mold frame shaft 1 between the Haver block 5 and the mold opening and closing frame 13. The Haver block 5 uses the thrust bearing to upper limit the mold opening and closing frame 13, so that the mold opening and closing frame 13 cannot move upward.

[0021] (2) When adjusting the height of the blow molding die, loosen the connection between the mold opening and closing frame 13 and the mold frame support 12 and the Haver block 5 so that the mold opening and closing frame 13 can move up and down. Then, drive the adjusting sleeve 4 to rotate forward by inserting the rod into the rotating hole 11, so that the adjusting sleeve 4 is raised until the mold opening and closing frame 13 is raised to the required height. Then, rotate the adjusting sleeve 4 in the opposite direction by N°, so that the adjusting sleeve 4 moves down a small distance. Then, insert the shim into the adjusting gap 16 until the shim can no longer be inserted. Then, rotate the adjusting sleeve 4 in the forward direction by N°, so that the mold opening and closing frame 13 is raised to the required height and each shim is fully pressed. Then, tighten the Haver block 5 and tighten the pressing bolt 8 to prevent the adjusting sleeve 4 from loosening and rotating.

[0022] If, after the mold opening and closing frame 13 is raised to the required height, shims are directly inserted into the adjusting gap 16 to attempt to fill it, this may result in the adjusting gap 16 not being reliably filled, causing the shims in the adjusting gap 16 to be relatively loose, thus failing to reliably abut against the Haver block 5. Instead, after the mold opening and closing frame 13 is raised to the required height, the adjusting sleeve 4 is first rotated in the reverse direction by N°, causing the adjusting sleeve 4 to move downward a short distance. Then, shims are inserted into the adjusting gap 16. This allows for the insertion of 1-2 more shims, ensuring that after the adjusting sleeve 4 is rotated forward by N°, the shims in the adjusting gap 16 are fully compressed, thus reliably abutting against the Haver block 5.

[0023] In this embodiment, N is between 20 and 40. If the rotation angle is too small, it will prevent the insertion of more shims; if the rotation angle is too large, too many shims will need to be inserted, which can cause the shims to loosen easily after being compressed. The shim thickness specifications are as follows: 0.05mm, 0.1mm, and 0.2mm. Excessively thick shims will significantly reduce their applicability. Wrench surfaces are provided on both sides of the shim block; when the adjusting sleeve 4 is rotated, the wrench prevents the shim block from rotating along with it.

Claims

1. A bottle blowing machine mold height adjustment mechanism comprising: The utility model relates to a mould frame shaft, mould frame support, a mould opening and closing frame for installing bottle blowing mould, and it is characterized by further comprising: an upper limiting boss arranged on the top of the cylindrical section of the mould frame shaft, a cushion block, an adjusting sleeve, a harvard block and a plurality of gaskets, a vertical internal thread hole is arranged in the middle of the cushion block, a pressing gap extending into the internal thread hole is arranged on the sidewall of the cushion block, a pressing bolt is arranged on the upper surface of the cushion block and is threadedly connected with the cushion block after passing through the pressing gap downwards, the adjusting sleeve is composed of a rotating section and a connecting section which are axially connected, the rotating section is above the connecting section, and an external thread is arranged on the outer side of the connecting section, the gaskets are provided with avoiding notches which enable the gaskets to be sleeved on the cylindrical section of the mould frame shaft, the adjusting sleeve and the cushion block are sleeved on the bottom of the cylindrical section of the mould frame shaft, the lower end of the cushion block abuts against the mould frame support, the adjusting sleeve supports the mould opening and closing frame through the thrust bearing sleeved on the mould frame shaft, the connecting section of the adjusting sleeve is screwed into the internal thread hole of the cushion block, the pressing gap is reduced under the pressing of the pressing bolt, thereby preventing the adjusting sleeve from loosening by destroying the thread in the internal thread hole, the harvard block is locked on the top of the cylindrical section of the mould frame shaft, an adjusting gap is left between the harvard block and the upper limiting boss, the gaskets are sleeved in the adjusting gap, and the harvard block is pressed and limited to the mould opening and closing frame through the thrust bearing sleeved on the mould frame shaft.

2. A bottle mould height adjustment mechanism according to claim 1, characterised in that: A rotating hole for driving the adjusting sleeve to rotate is arranged on the rotating section.

3. A bottle mould height adjustment mechanism according to claim 1 or claim 2, characterised in that: The thickness specifications of the gaskets are as follows: 0.05mm, 0.1mm and 0.2mm.

4. A bottle mould height adjustment mechanism according to claim 1 or 2, characterised in that: The two sides of the cushion block are respectively provided with wrench planes.

5. The method of claim 1 or 2, wherein: the mold height adjustment mechanism is a bottle blowing machine mold height adjustment mechanism. The method steps are as follows: (1) the adjusting sleeve and the cushion block are threadedly connected by screwing the connecting section of the adjusting sleeve into the internal thread hole of the cushion block, at this time, the lower end of the adjusting sleeve does not protrude from the lower end of the cushion block, the pressing bolt on the cushion block is not shielded by the adjusting sleeve, so that the pressing bolt can be screwed, then the adjusting sleeve and the cushion block connected together are sleeved on the bottom of the cylindrical section of the mould frame shaft, the lower end of the cushion block abuts against the mould frame support, the thrust bearing is sleeved on the mould frame shaft between the adjusting sleeve and the mould opening and closing frame, the adjusting sleeve supports the mould opening and closing frame through the thrust bearing, the harvard block is locked on the top of the cylindrical section of the mould frame shaft, an adjusting gap is left between the harvard block and the upper limiting boss, the thrust bearing is also sleeved on the mould frame shaft between the harvard block and the mould opening and closing frame, the harvard block is upper limited to the mould opening and closing frame through the thrust bearing, so that the mould opening and closing frame cannot move upwards; (2) when the height of the bottle blowing mould is adjusted, the connection between the mould opening and closing frame and the mould frame support and the harvard block are loosened, so that the mould opening and closing frame can move up and down, then the adjusting sleeve is driven to rotate forward by external force acting on the rotating section, so that the adjusting sleeve is lifted, until the mould opening and closing frame is adjusted to the required height, then the adjusting sleeve is reversely rotated N°, so that the adjusting sleeve moves downwards by a small distance, then the gaskets are sleeved in the adjusting gap, until the gaskets cannot continue to be sleeved, then the adjusting sleeve is forward rotated N°, so that the mould opening and closing frame is adjusted to the required height, and the gaskets are tightly pressed, then the harvard block is fastened, and the pressing bolt is screwed to prevent the adjusting sleeve from loosening and rotating.

6. The method of claim 5, wherein: N is 20-40.

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