Hydraulic clamping and extending device for extrusion blow molding hollow machine

Abstract

The utility model relates to the field of blow molding auxiliary equipment, in particular to a hydraulic clamping and stretching device for an extrusion blow molding hollow machine. The cylinder body is fixedly connected with the mounting base, an oil cavity is formed in the wall of the cylinder body, oil pipe joints are fixedly connected to the positions, located at two ports of the oil cavity, of the outer wall of the cylinder body, and cavities are formed in the inner walls of the two sides, close to the two ends, of the interior of the oil cavity; the end cover is detachably arranged at one end of the cylinder body; and the quick disassembly mechanism is arranged on the outer wall of the cylinder body and can quickly disassemble and replace the extrusion piece. According to the elastic collet chuck, the second ring frame can slide along the sliding groove by twisting the third ring frame, so that one end of the oil cavity is exposed, limiting on the inclined block is relieved, the inclined block and the extrusion block are pulled out conveniently and rapidly to be replaced, and compared with a traditional elastic collet chuck which needs to dismantle numerous peripheral components during replacement, the elastic collet chuck has the advantages that operation steps are greatly reduced, replacement time is saved, and replacement efficiency is improved. The equipment maintenance cost and the downtime are reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of blow molding auxiliary equipment, specifically a hydraulic clamping and extending device for an extrusion blow molding machine. Background Technology

[0002] In the operation of an extrusion blow molding machine, the mold clamping mechanism is crucial, as its stability and precision directly affect product quality and production efficiency. Traditional extrusion blow molding machines use hydraulic clamping extension devices, often employing elastic collets to limit the clamping guide pillars. However, with the development of production technology and the expansion of production scale, this structure has some problems.

[0003] First, the elastic collet structure is relatively long and installed inside the equipment. Replacement requires the removal of numerous surrounding components, resulting in extremely limited operating space. This makes the replacement process complex, time-consuming, and labor-intensive, increasing equipment maintenance costs and downtime, and impacting production schedules. Second, traditional devices cannot flexibly adjust the force applied to the elastic collet based on changes in hydraulic pressure. In actual production, hydraulic pressure fluctuates due to factors such as equipment operating conditions and ambient temperature. A fixed force application method makes it difficult for the elastic collet to adapt to these changes over long-term use. Furthermore, the continuous accumulation of stress concentration, aging, and wear causes the elastic collet to deform, leading to a gradual decrease in clamping capacity and an inability to stably hold the mold guide pillars. This severely affects the dimensional accuracy and quality stability of blow-molded products, increasing the scrap rate. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic clamping and extending device for an extrusion blow molding machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic clamping and extending device for an extrusion blow molding machine includes:

[0007] Mounting base;

[0008] The cylinder body is fixedly connected to the mounting base. An oil cavity is formed inside the cylinder body wall. An oil pipe joint is fixedly connected to two ports of the oil cavity on the outer wall of the cylinder body. Holes are formed on both inner walls of the oil cavity near the two ends.

[0009] End cap, which can be detached from one end of the cylinder block;

[0010] The quick-release mechanism, located on the outer wall of the cylinder, enables the rapid disassembly and replacement of the extruded parts.

[0011] The clamping mechanism, located between the oil cavity and the cavity, can quickly clamp the mold-locking guide pillar and adjust the clamping force to ensure operational stability.

[0012] Furthermore, the cylinder body has four sliding grooves at equal angles on one side of the center, and a threaded groove is formed on one side of the sliding groove on the cylinder body. A ring frame is fixedly connected to one side of the threaded groove on the cylinder body.

[0013] Preferably, the quick-release mechanism includes:

[0014] Ring frame two is slidably inserted into the four grooves. Ring frame three is rotatably connected to one end of ring frame two. Ring frame three is screwed into the threaded groove.

[0015] Preferably, the quick-release mechanism includes:

[0016] There are two hexagonal slots, which are equally spaced on the outer wall of the ring frame.

[0017] Preferably, the clamping mechanism includes:

[0018] The piston is slidably inserted into the oil chamber, and the piston is detachably connected to a ring frame.

[0019] Ring frame six is ​​fixed at one end of ring frame four;

[0020] An annular groove is formed on the outer wall of one end of the ring frame four, and the ring frame five is slidably inserted into the annular groove;

[0021] The square plate is fixed between the first end of the ring frame and the inner wall of the second ring frame.

[0022] Preferably, the clamping mechanism includes:

[0023] Four inclined blocks are provided, which are slidably inserted into the oil cavity at equal angles, with the inclined blocks located near the port of the oil cavity.

[0024] U-shaped frame, fixed on the plane of the inclined block;

[0025] The extrusion block is fixed to the outer wall of the inclined block.

[0026] Preferably, the clamping mechanism includes:

[0027] A square rod is slidably inserted into the inner wall of the cavity, and an arc-shaped frame is fixedly connected to one end of the square rod;

[0028] A rubber ring is slidably connected to the cavity at one of its ports.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] 1. The quick-release mechanism allows the ring frame two to slide and insert into the four sliding grooves. One end of the ring frame two is rotatably connected to the ring frame three, which is screwed into the threaded groove. This structural design allows the ring frame two to slide along the sliding groove by twisting the ring frame three when it is necessary to replace components such as the extrusion block. This exposes one end of the oil chamber, releases the restriction on the inclined block, and allows the inclined block and extrusion block to be pulled out for replacement quickly and easily. Compared with the traditional elastic collet, which requires the removal of many peripheral parts, this design greatly reduces the number of operation steps, saves replacement time, reduces equipment maintenance costs and downtime, and improves production efficiency. In addition, the two hexagonal grooves on the outer wall of the ring frame three at equal angles facilitate the operation of the operator using the hexagonal head rod, making the process of twisting the ring frame three more labor-saving and convenient, further improving the convenience of replacing parts.

[0031] 2. By installing pressure sensors inside the extrusion block in the clamping mechanism and hydraulic pressure sensors at the oil cavity inlet or critical path, precise control of the clamping force is achieved. The pressure sensors monitor the clamping force in real time. When the clamping force is lower than the set standard value, the control system adjusts the amount and pressure of oil entering the oil cavity based on the data collected by the hydraulic pressure sensors, pushing the ring frame to drive the inclined block to further extrude, making the extrusion block fit more tightly against the mold locking guide post. This ensures that even when the hydraulic pressure fluctuates due to changes in equipment operating status, ambient temperature, and other factors, the mold locking guide post can still be stably held, effectively improving the dimensional accuracy and quality stability of blow-molded products.

[0032] 3. The main limiting mechanism uses an extrusion block driven by an inclined block to press tightly against the mold-locking guide post for primary positioning. Simultaneously, the inclined block presses against a square rod, which in turn drives an arc-shaped frame to press against a rubber ring, making the rubber ring press tightly against the outer wall of the mold-locking guide post for auxiliary positioning. This combination of primary and auxiliary positioning enhances the clamping effect on the mold-locking guide post compared to traditional elastic collets, improves the stability of the mold-locking process, and, because it can flexibly adjust the clamping force according to changes in hydraulic pressure, overcomes the drawbacks of the fixed force application method of traditional devices. It reduces the decrease in clamping capacity caused by stress concentration, aging, wear, and other problems, extends the service life of the device, and ensures that it maintains good working performance under different working conditions. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the cross-sectional structure of the cylinder block in this utility model;

[0035] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the cylinder block in this utility model;

[0036] Figure 4 This is a schematic diagram of the arc-shaped frame structure in this utility model;

[0037] Figure 5 This is a schematic diagram of the quick-release mechanism in this utility model.

[0038] In the diagram: 120, cylinder block; 121, slide groove; 122, oil chamber; 123, oil pipe connector; 124, threaded groove; 125, ring frame one; 126, cavity; 130, end cap; 200, quick-release mechanism; 210, ring frame two; 211, ring frame three; 212, hexagonal groove; 300, clamping mechanism; 310, piston; 311, ring frame four; 312, ring groove; 313, ring frame five; 314, square plate; 315, ring frame six; 320, inclined block; 321, U-shaped frame; 322, extrusion block; 323, square rod; 324, arc-shaped frame; 325, rubber ring. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see Figure 1-5In this embodiment of the present invention, a hydraulic clamping and extending device for an extrusion blow molding machine includes a mounting base and the following components: a cylinder body 120 is fixedly connected to the mounting base, an oil cavity 122 is formed in the inner wall of the cylinder body 120, and oil pipe joints 123 are fixedly connected to two ports of the oil cavity 122 on the outer wall of the cylinder body 120. Cavities 126 are formed on the inner walls of the oil cavity 122 near both ends. An end cap 130 is detachable from one end of the cylinder body 120. A quick-release mechanism 200 is provided on the outer wall of the cylinder body 120, which enables quick disassembly and replacement of the extruded part. A clamping mechanism 300 is provided between the oil cavity 122 and the cavity 126, which enables quick clamping of the mold-locking guide post and can adjust the clamping force to ensure operational stability. Four sliding grooves 121 are formed at equal angles on one side of the center of the outer wall of the cylinder body 120, and a threaded groove is formed on one side of the sliding grooves 121 on the outer wall of the cylinder body 120. 124. A ring frame 125 is fixedly connected to the outer wall of the cylinder body 120 on one side of the threaded groove 124. The quick-release mechanism 200 includes: a ring frame 210 that is slidably inserted into the interior of four sliding grooves 121, and a ring frame 311 that is rotatably connected to one end of the ring frame 211. The ring frame 311 is screwed into the threaded groove 124. Two hexagonal grooves 212 are provided and are equally angled on the outer wall of the ring frame 311. The quick-release mechanism 200 connects the ring frame 210 to the four sliding grooves 124. The internal sliding grooves 121 are slidably connected, and the ring frame 210 is rotatably connected at one end to the ring frame 311, which is screwed into the threaded groove 124. This structural design allows the ring frame 210 to slide along the sliding groove 121 by twisting the ring frame 311 when it is necessary to replace the extrusion block 322 and other parts. This exposes one end of the oil cavity 122, releases the restriction on the inclined block 320, and makes it convenient and quick to pull out the inclined block 320 and the extrusion block 322 for replacement.

[0041] The clamping mechanism 300 includes: a piston 310 that is slidably inserted into the oil chamber 122, and a ring frame 311 and a ring frame 315 that are detachably connected to it and fixed at one end of the ring frame 311; an annular groove 312 that is opened on the outer wall of one end of the ring frame 311 and a ring frame 313 that is slidably inserted into it; a square plate 314 that is fixed between one end of the ring frame 313 and the inner wall of the ring frame 210; four inclined blocks 320 that are slidably inserted into the oil chamber 122 at equal angles; a U-shaped frame 321 that is fixed on the plane of the inclined block 320 and a squeezing block 322 that is fixed on the outer wall of the inclined block 320 near the port of the oil chamber 122; and a pressure sensor installed inside the squeezing block 322 in the clamping mechanism 300, and an oil pressure sensor installed at the inlet of the oil chamber 122 or on the critical path, to achieve precise control of the clamping force.

[0042] The clamping mechanism 300 further includes: a square rod 323 slidably inserted into the inner wall of the cavity 126, and an arc-shaped frame 324 fixedly connected to one end of the rod; a rubber ring 325 slidably connected to the inside of the cavity 126 at one of its ports; and a pressing block 322, driven by the inclined block 320, closely adhering to the mold-locking guide post for primary positioning. At the same time, the inclined block 320 presses the square rod 323, and the square rod 323 drives the arc-shaped frame 324 to press the rubber ring 325, so that the rubber ring 325 closely adheres to the outer wall of the mold-locking guide post for auxiliary positioning.

[0043] Specifically, during operation, when the mold-locking guide post passes through the inside of the cylinder 120, hydraulic oil is introduced into the oil chamber 122 through the oil pipe joint 123. At this time, under the action of hydraulic pressure, the piston 310 drives the ring frame 315 to move along the inside of the oil chamber 122 until it contacts the inclined surface of the inclined block 320. After the inclined block 320 is squeezed, it drives the extrusion block 322 to slide along the inside of the oil chamber 122 towards the inside of the cylinder 120, so that the extrusion block 322 is in close contact with the mold-locking guide post, which provides the main limit for the mold-locking guide post. When the inclined block 320 slides down, it will squeeze the square rod 323 located inside the cavity 126. The square rod 323, under compression, moves the arc-shaped frame 324. The arc-shaped frame 324 compresses the rubber ring 325, causing the rubber ring 325 to adhere tightly to the outer wall of the mold-locking guide post for auxiliary limiting, thereby realizing the mold-locking action. When the mold opens, the hydraulic oil inside the oil chamber 122 is withdrawn from the oil pipe joint 123. At this time, the extrusion block 322 and the rubber ring 325 simultaneously lose the pressure compressing the mold-locking guide post, allowing the mold-locking guide post to be unrestricted and exit the cylinder body 120, completing the pressure relief and mold-opening action. A pressure sensor is installed inside the extrusion block 322, which can monitor the pressure exerted by the extrusion block 322 on the mold-locking guide post in real time. The clamping force of the mold-locking guide post is fed back to the control system. An oil pressure sensor can be installed at the inlet of the oil chamber 122 to monitor the oil pressure entering the chamber. Based on the data collected by these sensors, the control system precisely controls the amount of oil entering the chamber 122, pushing the ring frame 315 further to move it, causing the inclined block 320 to be subjected to more pressure. This results in the extrusion block 322 fitting more tightly against the mold-locking guide post, ensuring a stable and reliable clamping effect. When the extrusion block 322 needs to be replaced, personnel use two hexagonal rods to insert into the corresponding six... Inside the corner groove 212, the twisting ring frame 3 211 rotates and engages with the threaded groove 124, causing the ring frame 3 211 to move away from the ring frame 1 125, so that the ring frame 2 210 slides to one side along the inside of the slide groove 121, exposing one end of the oil cavity 122. As the ring frame 2 210 moves, it will drive the ring frame 5 313 ​​to slide into the ring groove 312, exposing the inclined block 320 and releasing the limit on the inclined block 320. Personnel can insert the hooked rod into the inside through this port and hook the U-shaped frame 321 to pull out the inclined block 320 and the extrusion block 322, and replace the extrusion block 322.

[0044] Example 1

[0045] like Figure 2 and Figure 5 As shown, in this embodiment, the quick-release mechanism 200 includes: a ring frame 210 that is slidably inserted into the interior of four sliding grooves 121, and a ring frame 3 211 that is rotatably connected to one end of the ring frame 210. The ring frame 3 211 is screwed into the threaded groove 124. Two hexagonal grooves 212 are provided and are opened at equal angles on the outer wall of the ring frame 3 211.

[0046] In this embodiment, the quick-release mechanism 200 has a ring frame 210 that slides into the four slide grooves 121. One end of the ring frame 210 is rotatably connected to the ring frame 311, which is screwed into the threaded groove 124. This structural design allows the ring frame 210 to slide along the slide groove 121 by twisting the ring frame 311 when it is necessary to replace components such as the extrusion block 322. This exposes one end of the oil chamber 122, releases the restriction on the inclined block 320, and allows the inclined block 320 and the extrusion block 322 to be pulled out for replacement quickly and easily. Compared with the traditional elastic collet replacement which requires the removal of many peripheral components, this greatly reduces the operation steps, saves replacement time, reduces equipment maintenance costs and downtime, and improves production efficiency. In addition, the two hexagonal grooves 212 that are equally angled on the outer wall of the ring frame 311 make it convenient for operators to use hexagonal head rods for operation, making the process of twisting the ring frame 311 more labor-saving and convenient, further improving the convenience of component replacement.

[0047] like Figure 2-3 As shown, in this embodiment, the clamping mechanism 300 includes: a piston 310 that is slidably inserted into the oil cavity 122, and a ring frame 311 and a ring frame 315 that are detachably connected to it and fixed at one end of the ring frame 311; a ring groove 312 that is opened on the outer wall of one end of the ring frame 311 and a ring frame 313 that is slidably inserted into it; a square plate 314 that is fixed between one end of the ring frame 313 and the inner wall of the ring frame 210; four inclined blocks 320 that are slidably inserted into the oil cavity 122 at equal angles; and a U-shaped frame 321 that is fixed on the plane of the inclined block 320 and a pressing block 322 that is fixed on the outer wall of the inclined block 320 at the position of the inclined block 320 near the port of the oil cavity 122.

[0048] In practice, by installing a pressure sensor inside the extrusion block 322 in the clamping mechanism 300, and an oil pressure sensor at the inlet of the oil chamber 122 or on the critical path, precise control of the clamping force is achieved. The pressure sensor monitors the clamping force in real time. When the clamping force is lower than the set standard value, the control system adjusts the amount and pressure of oil entering the oil chamber 122 based on the data collected by the oil pressure sensor, pushing the ring frame to drive the inclined block 320 to further extrude, making the extrusion block 322 fit more tightly against the mold locking guide post. This ensures that even when the oil pressure fluctuates due to changes in equipment operating status, ambient temperature, and other factors, the mold locking guide post can still be stably held, effectively improving the dimensional accuracy and quality stability of blow-molded products.

[0049] Example 2

[0050] like Figure 3-4 As shown, in this embodiment, the clamping mechanism 300 further includes: a square rod 323 that is slidably inserted into the inner wall of the cavity 126, and an arc-shaped frame 324 that is fixedly connected to one end of the rod; and a rubber ring 325 that is slidably connected to the inside of the cavity 126 at one of its ports.

[0051] In specific implementation, the extrusion block 322, driven by the inclined block 320, adheres tightly to the mold-locking guide post for primary positioning. Simultaneously, the inclined block 320 extrudes the square rod 323, which in turn drives the arc frame 324 to extrude the rubber ring 325, causing the rubber ring 325 to adhere tightly to the outer wall of the mold-locking guide post for auxiliary positioning. This combination of primary and auxiliary positioning enhances the clamping effect on the mold-locking guide post compared to traditional elastic collets, improves the stability of the mold-locking process, and, because it can flexibly adjust the clamping force according to changes in hydraulic pressure, the clamping mechanism 300 overcomes the drawbacks of the fixed force application method of traditional devices, reduces the decrease in clamping capacity caused by stress concentration, aging, wear, and other problems, extends the service life of the device, and ensures that it maintains good working performance under different working conditions.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic clamping and extending device for an extrusion blow molding machine, characterized in that, include: Mounting base; The cylinder body (120) is fixedly connected to the mounting base. An oil cavity (122) is opened in the inner wall of the cylinder body (120). An oil pipe joint (123) is fixedly connected to two ports of the oil cavity (122) on the outer wall of the cylinder body (120). A cavity (126) is opened on both inner walls of the oil cavity (122) near the two ends. End cap (130) is detachable from one end of cylinder body (120); A quick-release mechanism (200) is provided on the outer wall of the cylinder body (120); The clamping mechanism (300) is located between the oil cavity (122) and the cavity (126).

2. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 1, characterized in that, The outer wall of the cylinder (120) has four sliding grooves (121) at equal angles on one side of the center. The outer wall of the cylinder (120) has a threaded groove (124) on one side of the sliding groove (121). A ring frame (125) is fixedly connected to the outer wall of the cylinder (120) on one side of the threaded groove (124).

3. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 2, characterized in that, The quick-release mechanism (200) includes: Ring frame two (210) is slidably inserted into the interior of four sliding grooves (121). Ring frame three (211) is rotatably connected to one end of ring frame two (210). Ring frame three (211) is screwed into the threaded groove (124).

4. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 3, characterized in that, The quick-release mechanism (200) includes: Two hexagonal slots (212) are provided, and are equally spaced on the outer wall of the ring frame three (211).

5. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 4, characterized in that, The clamping mechanism (300) includes: The piston (310) is slidably inserted into the oil chamber (122), and the piston (310) is detachably connected to the ring frame four (311); Ring frame six (315) is fixed at one end of ring frame four (311); A ring groove (312) is formed on the outer wall of one end of the ring frame four (311), and a ring frame five (313) is slidably inserted inside the ring groove (312); The square plate (314) is fixed between one end of the ring frame five (313) and the inner wall of the ring frame two (210).

6. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 5, characterized in that, The clamping mechanism (300) includes: Four inclined blocks (320) are provided and are slidably inserted into the oil cavity (122) at equal angles, with the inclined blocks (320) located near the port of the oil cavity (122). The U-shaped frame (321) is fixed on the plane of the inclined block (320); The extrusion block (322) is fixed on the outer wall of the inclined block (320).

7. The hydraulic clamping and extending device for an extrusion blow molding machine according to claim 6, characterized in that, The clamping mechanism (300) includes: A square rod (323) is slidably inserted into the inner wall of the cavity (126), and an arc-shaped frame (324) is fixedly connected to one end of the square rod (323); A rubber ring (325) is slidably connected to the cavity (126) at one of its ports.

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