Lower blowing device for blow molding of hollow double-mouth chemical plastic drum

Abstract

This application discloses a blow molding device for hollow double-mouth chemical plastic drums, comprising a support plate; a lifting cylinder connected to the support plate; a blow needle mechanism connected to the support plate and capable of vertical displacement relative to the support plate; and a follower assembly connected to the blow needle mechanism. The follower assembly includes a follower plate and at least one follower hook connected to both sides of the follower plate. The support plate is provided with several first guide posts. The blow needle mechanism and the follower assembly are slidably connected to the first guide posts, and the follower plate is positioned between the blow needle mechanism and the support plate. The follower plate is also provided with a top-diameter cylinder, which is connected to the blow needle mechanism to drive the blow needle mechanism to move relative to the follower assembly. By setting the follower assembly, they can be interconnected during the upward movement of the lower mold to drive the blow needle assembly upward, making it easier to lift the blow needle to the corresponding position of the main mold. Combined with the top-diameter cylinder, the lifting height of the blow needle can be increased.

Description

Technical Field

[0001] This application relates to the technical field of blow molding machines, and in particular to a down-blowing device for blow molding hollow double-mouth chemical plastic drums. Background Technology

[0002] Blow molding, also known as hollow blow molding, is a molding process used to manufacture hollow containers, and it is widely used, especially in the production and manufacturing of hollow containers. The downblowing device is a module in a blow molding machine, mainly used to blow high-pressure air into the material to keep it in an expanded state and form a hollow cavity.

[0003] Existing molding die structures for forming large-capacity chemical plastic drums typically include a main mold and upper and lower sub-molds located on either side of the main mold. The upper and lower sub-molds close synchronously with the main mold and are displaced towards one side of the main mold by their respective independent drive components. The reason for setting up upper and lower sub-molds is that traditional chemical plastic drums, such as... Figure 1 As shown, it includes a main body and protrusions on both sides of the main body. A partition step is formed between the protrusions and the main body. The partition steps on both sides are formed in the cavity between the main mold and the upper and lower sub-molds.

[0004] Since the lower mold needs to be vertically lifted towards the main mold during the mold closing process, the lifting cylinder in the lower blowing device needs to lift the blow needle synchronously to achieve the follow-up movement with the lower mold. This means that a lot of time needs to be spent adjusting the feed parameters of the lifting cylinder before processing to achieve the follow-up synchronization accuracy between the blow needle and the lower mold. Utility Model Content

[0005] To facilitate the molding of chemical plastic drums, this application provides a blow molding device for hollow double-mouth chemical plastic drums.

[0006] The blow molding device for hollow double-mouth chemical plastic drums provided in this application adopts the following technical solution:

[0007] A blow molding device for blow molding hollow double-mouth chemical plastic drums includes:

[0008] Support plate;

[0009] The lifting cylinder is connected to the support plate;

[0010] A needle-blowing mechanism, connected to a support plate and capable of vertical displacement relative to the support plate; and

[0011] A follower assembly is connected to a blow needle mechanism. The follower assembly includes a follower plate and at least one follower hook connected to both sides of the follower plate.

[0012] The support plate is provided with a plurality of first guide posts. The blow needle mechanism and the follower assembly are slidably connected to the first guide posts, and the follower plate is placed between the blow needle mechanism and the support plate. The follower plate is also provided with a top diameter oil cylinder, which is connected to the blow needle mechanism to drive the blow needle mechanism to move relative to the follower assembly.

[0013] By adopting the above technical solution, during the molding process, the lifting cylinder acts on the support plate to first lift the blow-off mechanism and the follower component to the position of the lower sub-mold. After the lower sub-mold is closed, it is engaged with the follower hook through the hook plate connected at the lower end. When the lower sub-mold moves towards the main mold, it can synchronously drive the follower component. The follower component is connected to the blow-off mechanism, and thus synchronously drives the blow-off mechanism. This eliminates the need for adjusting the follower feed of the lifting cylinder and the lower sub-mold. It is only necessary to lift the follower component to the position of the hook plate of the lower sub-mold by the lifting cylinder. The vertical height of the hook plate is fixed before the lower sub-mold is closed. It is only necessary to lift the position of the follower hook to a position higher than the hook plate, which makes it easier to lift the blow-off into the main mold.

[0014] Preferably, the follower hook includes an adjusting plate, the adjusting plate having an elongated opening along the axial direction of the first guide post, a fastener being slidably connected within the elongated opening, and one end of the fastener being connected to the follower plate.

[0015] By adopting the above technical solution, the opening of the long slot allows for adjustment of the connection position between the follower hook and the follower plate, which can expand the stroke range of the lifting cylinder and provide a wider range of models to choose from.

[0016] Preferably, the blow needle mechanism includes:

[0017] A blow needle holder, comprising a hollow frame and guide blocks connected to both sides of the frame, the guide blocks being slidably connected to a first guide post;

[0018] A blow needle assembly is slidably connected to a frame, the blow needle assembly including a sliding seat and a blow needle disposed on the sliding seat; and

[0019] The driving component is mounted on the frame and connected to its sliding seat, and is used to drive the sliding seat to move relative to the frame.

[0020] By adopting the above technical solution, the blow needle can slide with the frame under the drive of the driving component, which can be applied to the downward blowing action of different types of chemical plastic drums.

[0021] Preferably, the sliding seat includes:

[0022] The first base has a mounting hole for the blow needle to pass through;

[0023] The second body connects to both sides of the first body;

[0024] Connecting columns, passing through the first and second seats; and

[0025] A connecting plate is installed on one side of the first base body to connect the first base body and the second base body;

[0026] The frame is also provided with a second guide post, and the second seat is slidably connected to the second guide post.

[0027] By adopting the above technical solution, the split sliding seat setting allows the dimensions of the first seat and the second seat to be freely matched, and the position of the blow needle relative to the mold can be better adjusted.

[0028] Preferably, the end of the first guide post is threadedly connected to a limiting seat, the top diameter cylinder is connected to the guide block, and when the top diameter cylinder drives the guide block to move axially along the first guide post, the guide block can abut against the limiting seat to suppress the movement of the guide block in one direction.

[0029] By adopting the above technical solution, after the blow needle moves to the position with the lower mold, the top diameter cylinder can lift the entire blow needle assembly by connecting with the guide block, thereby increasing the displacement stroke of the blow needle assembly; secondly, since the blow needle not only blows high-pressure air into the material but also serves as an insert for molding the opening of the plastic bucket, after the material accumulates at the outer edge of the opening, the top diameter cylinder applies a vertical upward force to the blow needle, making the surface formed at the outer edge of the opening smoother.

[0030] Preferably, the blow needle mechanism further includes an adjustment component for driving the blow needle to rotate relative to the sliding seat, the adjustment component comprising:

[0031] Drive motor;

[0032] The drive gear is connected to the drive motor; and

[0033] The driven gear is connected to the blow needle, and the driven gear is connected to the driving gear;

[0034] The blow needle has an external thread for forming the internal thread of the opening of a chemical plastic drum.

[0035] By adopting the above technical solution, the drive motor drives the active gear to rotate, the active gear drives the driven gear to rotate, and then drives the blow needle to rotate. The blow needle has an external thread for forming the internal thread of the plastic cylinder opening. During demolding, the blow needle needs to rotate to disengage from the formed internal thread.

[0036] Preferably, the adjusting assembly further includes a transition gear meshing with the driving gear and the driven gear, wherein the number of teeth of the transition gear is greater than the number of teeth of the driving gear.

[0037] By adopting the above technical solution, the setting of the transition gear increases the rotational torque, which can drive the blow needle to rotate more smoothly.

[0038] Preferred options also include:

[0039] Mounting plate, the lifting cylinder is mounted on the mounting plate; and

[0040] A limiting rod, one end of which is connected to a support plate, and the other end of which is slidably connected to a mounting plate;

[0041] The limiting rod is also threaded with a limiting nut. When the lifting cylinder drives the support plate to move relative to the mounting plate, the limiting nut can abut against the mounting plate to suppress the movement of the support plate in one direction.

[0042] By adopting the above technical solution, when the lifting cylinder drives the support plate to move relative to the mounting plate, the limit nut limits the maximum distance between the two, that is, the maximum stroke of the lifting cylinder, which plays a mechanical limiting role and can ensure that the follow-up hook is lifted to the stroke position.

[0043] In summary, this application includes at least one of the following beneficial technical effects:

[0044] 1. By setting follow-up components, they can be connected to each other during the upward movement of the lower sub-mold to drive the blow needle assembly upward, which makes it easier to raise the blow needle to the corresponding position of the main mold. Combined with the setting of the top diameter cylinder, the lifting height of the blow needle can be increased.

[0045] 2. With the split sliding seat setting and the connection of the drive component, the horizontal position of the blow needle relative to the main mold can be adjusted, which is suitable for blowing air for different types of container molding. Attached Figure Description

[0046] Figure 1 This is a structural diagram of a chemical plastic drum;

[0047] Figure 2 This is a schematic diagram of the downblowing device;

[0048] Figure 3 This diagram mainly shows the connection between the follower plate, the top diameter cylinder, the frame, and the first guide post;

[0049] Figure 4 This is a schematic diagram showing the connection between the sliding seat and the frame;

[0050] Figure 5 This is a schematic diagram of the sliding seat connection;

[0051] Figure 6 This diagram mainly illustrates the connection between the adjustment component and the blow needle;

[0052] Figure 7This is a schematic diagram showing the position of the downblowing device relative to the forming mold in its initial state.

[0053] Figure 8 A schematic diagram showing the state in which the hydraulic cylinder lifts the follower hook to the hook plate position;

[0054] Figure 9 This is a schematic diagram showing the state after the lower mold hook plate and the follower hook are engaged.

[0055] Figure 10 This is a schematic diagram showing the state after the blow needle rises with the lower mold and closes with the main mold.

[0056] Explanation of reference numerals in the attached drawings: 1. Support plate; 2. Lifting cylinder; 3. Needle blowing mechanism; 31. Frame; 311. Adjustment port; 32. Guide block; 33. Driving component; 34. Second guide post; 35. Sliding seat; 351. First seat; 3511. Mounting hole; 352. Second seat; 353. Connecting post; 354. Connecting plate; 36. Needle blowing; 361. External thread; 37. Gear seat; 4. Follower assembly; 41. Follower plate; 42. Follower hook; 421. Adjustment plate; 4211. Long slot; 4 22. Horizontal plate; 43. Fastener; 5. Mounting plate; 51. Third guide post; 52. Limiting rod; 53. Limiting nut; 6. First guide post; 61. Guide sleeve; 7. Top diameter cylinder; 71. Piston rod; 8. Limiting seat; 81. Locking nut; 9. Adjusting assembly; 91. Extension plate; 92. Drive motor; 93. Drive gear; 94. Transition gear; 95. Driven gear; 10. Main body; 20. Protrusion; 30. Frame; 40. Main mold; 50. Upper sub-mold; 60. Lower sub-mold; 601. Hook plate. Detailed Implementation

[0057] The present application will be further described in detail below with reference to the accompanying drawings.

[0058] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0060] Figure 2 This paper illustrates the structure of a blow molding device for hollow double-mouth chemical plastic drums. The entire blow molding device is positioned below the molding die. The specific structure of the blow molding device includes a lifting cylinder 2, a follower assembly 4, and a blow needle mechanism 3. The lifting cylinder 2 is located below the mounting plate 5, with its cylinder body connected to the mounting plate 5. The piston rod 71 of the lifting cylinder 2 is connected to a support plate 1. The support plate 1 is positioned above the mounting plate 5 and can move away from or closer to the mounting plate 5 under the drive of the lifting cylinder 2. The mounting plate 5 is connected to the bottom frame 30 of the blow molding machine.

[0061] The follower component 4 is connected to the blow needle mechanism 3, and both are installed above the support plate 1. The support plate 1 is provided with a plurality of first guide posts 6. The follower component 4 can slide axially relative to the first guide posts 6 with the blow needle mechanism 3.

[0062] The follower assembly 4 includes a follower plate 41 slidably connected to the first guide post 6 and at least one follower hook 42 connected to both sides of the follower plate 41. In this embodiment, two follower hooks 42 are respectively provided at intervals on both sides of the follower plate 41. Each follower hook 42 includes an adjusting plate 421 and a horizontal plate 422 provided at the end of the adjusting plate 421. The horizontal plate 422 and the adjusting plate 421 have an included angle to form a hook portion. The adjusting plate 421 has an elongated opening 4211 along the axial direction of the first guide post 6. A fastener 43 is inserted into the elongated opening 4211. One end of the fastener 43 is connected to the follower plate 41 to realize the connection and fixation between the follower hook 42 and the follower plate 41. The vertical height between the horizontal plate 422 and the follower plate 41 can be adjusted through the elongated opening 4211 to adapt to the follower adjustment of different molding die sizes.

[0063] Combination Figure 3 and Figure 4 The blow needle mechanism 3 includes a blow needle holder, a blow needle assembly, and a drive member 33. The blow needle holder includes a frame 31 with a hollow adjustment port 311. The blow needle assembly is connected to the drive member 33 and can be displaced within the adjustment port 311 under the drive of the drive member 33.

[0064] A guide block 32 is provided on both sides of the frame 31, and the guide block 32 is slidably connected to the first guide post 6. Two top diameter cylinders 7 are also provided on the follower plate 41. The piston rod 71 of each top diameter cylinder 7 is connected to the guide block 32 on one side, thereby realizing the connection between the follower component 4 and the blow needle mechanism 3. The entire blow needle mechanism 3 can also be displaced relative to the follower plate 41 under the drive of the top diameter cylinders 7.

[0065] One end of the first guide post 6 is also threadedly connected to a limiting seat 8, which limits the maximum lifting stroke of the top diameter cylinder 7 driving the frame 31. When the guide block 32 abuts against the bottom of the limiting seat 8, the maximum lifting stroke of the top diameter cylinder 7 is reached. The end of the first guide post 6 is also threadedly connected to a locking nut 81, which abuts against the limiting seat 8 to reduce the loosening of the limiting seat 8.

[0066] Combination Figure 5 The blow needle assembly includes a blow needle 36 and a connected sliding seat 35. The sliding seat 35 includes a first seat 351 and a second seat 352 connected to both sides of the first seat 351. A connecting post 353 is inserted inside the first seat 351. The two ends of the connecting post 353 are respectively connected to one of the second seats 352. At the same time, an adjusting plate 421 is also connected to one side of the first seat 351 and the two second seats 352. The adjusting plate 421 is further connected to the first seat 351 and the second seat 352 by screws.

[0067] Two second guide posts 34 are also provided inside the adjustment port 311. The two second guide posts 34 pass through the second seat 352 respectively, so that the entire sliding seat 35 can slide axially along the second guide posts 34. The driving component 33 is mounted on the frame 31 and connected to the second seat 352. In this embodiment, two sets of the blow needle assembly are provided. The driving component 33 is a cylinder, hydraulic cylinder or other linear propulsion assembly. The two driving components 33 can independently drive the connected sliding seat 35 to move axially relative to the second guide posts 34 to adjust the position of the two blow needles 36.

[0068] Combination Figure 6 The first base 351 has a through mounting hole 3511. The blow needle 36 passes through the mounting hole 3511 and can rotate relative to the first base 351. To reduce rotational wear between the blow needle 36 and the first base 351, a bushing or bearing is provided in the mounting hole 3511. The blow needle 36 is generally cylindrical and has an external thread 361 at its end for forming an internal thread in the opening of the container.

[0069] The blow needle mechanism 3 also includes an adjustment component 9 connected to the blow needle 36. The adjustment component 9 includes a drive motor 92, a drive gear 93 connected to the drive motor 92, a transition gear 94, and a driven gear 95. The drive motor 92 is mounted under an extension plate 91. One end of the extension plate 91 is connected to a gear seat 37. The gear seat 37 is connected to the bottom of the first seat 351. The driven gear 95 is rotatably connected to the gear seat 37 and connected to the blow needle 36 via a key. The transition gear 94 meshes with the drive gear 93 and the driven gear 95 respectively, and the number of teeth of the transition gear 94 is greater than the number of teeth of the drive gear. Therefore, when the drive motor 92 is working, the rotation of the drive gear 93 can drive the driven gear 95 to rotate through the transition gear 94, thereby causing the blow needle 36 to rotate relative to the first seat 351.

[0070] See also Figures 7-10 When the down-blowing device is activated, the lifting cylinder 2 drives the support plate 1 to move toward the lower mold 60. The movement of the support plate 1 lifts the follower assembly 4 and the blow needle mechanism 3. To limit the maximum lifting stroke of the lifting cylinder 2, a limiting rod 52 is also provided on the mounting plate 5. One end of the limiting rod 52 is connected to the support plate 1, and the other end is threaded with a limiting nut 53. When the limiting nut 53 abuts against the end face of the mounting plate 5, it is at the maximum lifting stroke of the lifting cylinder 2.

[0071] After the lifting cylinder 2 reaches the specified stroke, the horizontal plate 422 of the follower hook 42 is higher than the hook plate 601 of the lower sub-mold 60. At this time, the main mold 40, the upper sub-mold 50 and the lower sub-mold 60 begin to close. After the mold is closed, the hook plate 601 engages with the follower hook 42. The upper sub-mold 50 and the lower sub-mold 60 close towards the side of the main mold 40 under the drive of an independent drive source. The hook plate 601 acts on the follower hook 42 to lift, and simultaneously lifts the entire blow needle mechanism 3 until the two sub-molds close with the main mold 40. Finally, the top diameter cylinder 7 drives the blow needle 36 to lift a certain distance, making the end face of the opening of the chemical plastic cylinder flatter.

[0072] After blow molding, the blow needle 36 can be separated from the threaded opening by adjusting component 9 to drive the blow needle 36 to rotate.

[0073] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A blow molding device for blow molding hollow double-mouth chemical plastic drums, characterized in that, include: Support plate (1); Lifting cylinder (2) is connected to support plate (1); The blow needle mechanism (3) is connected to the support plate (1) and can be displaced vertically relative to the support plate (1); and Follower assembly (4) is connected to blow needle mechanism (3). The follower assembly (4) includes follower plate (41) and at least one follower hook (42) connected to both sides of follower plate (41). The support plate (1) is provided with a plurality of first guide posts (6), the blow needle mechanism (3) and the follower assembly (4) are slidably connected to the first guide posts (6), and the follower plate (41) is placed between the blow needle mechanism (3) and the support plate (1). The follower plate (41) is also provided with a top diameter cylinder (7), which is connected to the blow needle mechanism (3) to drive the blow needle mechanism (3) to move relative to the follower assembly (4).

2. The blow molding device for hollow double-mouth chemical plastic drums according to claim 1, characterized in that, The follower hook (42) includes an adjustment plate (421), the adjustment plate (421) has an elongated opening (4211) along the axial direction of the first guide post (6), and a fastener (43) is slidably connected in the elongated opening (4211), one end of the fastener (43) is connected to the follower plate (41).

3. The blow molding device for hollow double-mouth chemical plastic drums according to claim 1, characterized in that, The blow needle mechanism (3) includes: The blow needle holder includes a hollow frame (31) and guide blocks (32) connected to both sides of the frame (31), the guide blocks (32) being slidably connected to the first guide post (6). A blow needle assembly is slidably connected to the frame (31), the blow needle assembly including a sliding seat (35) and a blow needle (36) disposed on the sliding seat (35); and The drive unit (33) is mounted on the frame (31) and connected to its sliding seat (35) to drive the sliding seat (35) to move relative to the frame (31).

4. The blow molding device for hollow double-mouth chemical plastic drums according to claim 3, characterized in that, The sliding seat (35) includes: The first seat (351) has a mounting hole (3511) for the blow needle (36) to pass through. The second body (352) is connected to both sides of the first body (351); A connecting column (353) is inserted into the first base (351) and the second base (352); and A connecting plate (354) is installed on one side of the first base (351) and is used to connect the first base (351) and the second base (352). The frame (31) is also provided with a second guide post (34), and the second seat (352) is slidably connected to the second guide post (34).

5. The blow molding device for hollow double-mouth chemical plastic drums according to claim 3, characterized in that, The end of the first guide post (6) is threadedly connected to a limiting seat (8). The top diameter cylinder (7) is connected to the guide block (32). When the top diameter cylinder (7) drives the guide block (32) to move axially along the first guide post (6), the guide block (32) can abut against the limiting seat (8) to suppress the movement of the guide block (32) in one direction.

6. The blow molding device for hollow double-mouth chemical plastic drums according to claim 3, characterized in that, The blow needle mechanism (3) further includes an adjustment assembly (9) for driving the blow needle (36) to rotate relative to the sliding seat (35), the adjustment assembly (9) comprising: Drive motor (92); The drive gear (93) is connected to the drive motor (92); and Driven gear (95) is connected to blow needle (36), and driven gear (95) is connected to driving gear (93); The blow needle (36) has an external thread (361) for forming the internal thread of the opening of a chemical plastic barrel.

7. The blow molding device for hollow double-mouth chemical plastic drums according to claim 6, characterized in that, The adjustment assembly (9) further includes a transition gear (94) meshing with the drive gear (93) and the driven gear (95), wherein the number of teeth of the transition gear (94) is greater than the number of teeth of the drive gear (93).

8. The blow molding device for hollow double-mouth chemical plastic drums according to claim 1, characterized in that, Also includes: Mounting plate (5), the lifting cylinder (2) is mounted on the mounting plate (5); as well as Limiting rod (52), one end of which is connected to the support plate (1), and the other end is slidably connected to the mounting plate (5); The limiting rod (52) is also threaded with a limiting nut (53). When the lifting cylinder (2) drives the support plate (1) to move relative to the mounting plate (5), the limiting nut (53) can abut against the mounting plate (5) to suppress the movement of the support plate (1) in one direction.

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