Continuous multi-layer blow molding machine die head with transparent lines

Abstract

The utility model discloses a continuous multi-layer blow molding machine die head with a transparent line, which comprises a storage cylinder, a storage core, a guide ring assembly, a transparent ring, at least one adjusting piece and an extrusion channel, the material guide ring assembly comprises a first material guide ring, a second material guide ring, a third material guide ring, a fourth material guide ring and a fifth material guide ring which are sequentially arranged on the side, facing the inner wall of the material storage cylinder, of the material storage core in a sleeving mode, and the five material guide rings arranged in a sleeving mode are combined with the material storage core and the material storage cylinder to jointly form six material conveying channels. At most six materials can be input into the die head at the same time or in an independent combination mode, and the requirement for forming more products can be met; and meanwhile, the transparent ring is arranged, so that the formed product has a liquid level line, and the practicability of the product can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blow molding machines, in particular to a multi-layer continuous blow molding machine die head with transparent lines. BACKGROUND

[0002] A blow molding machine is a common molding device for plastic production and molding, and is usually applied to the molding of hollow plastic containers. For different production requirements of plastic containers, such as gasoline barrels, in addition to requiring a certain strength, high temperature resistance and corrosion resistance are also required. Therefore, a multi-layer blow molding die head is needed to achieve the above functions. The common blow molding machine die heads on the market have single, double and three layers, and each layer can pass corresponding functional materials to achieve the corresponding functions of the molded container. However, for containers with more functional requirements, the existing die heads with the above number of layers cannot achieve production and molding. CONTENT OF THE UTILITY MODEL

[0003] In order to meet the molding of plastic containers with more functions, the present application provides a continuous multi-layer blow molding machine die head with transparent lines.

[0004] The continuous multi-layer blow molding machine die head with transparent lines provided by the present application adopts the following technical scheme:

[0005] A continuous multi-layer blow molding machine die head with transparent lines comprises:

[0006] a storage cylinder;

[0007] a storage core partially accommodated in the storage cylinder;

[0008] a material guiding ring assembly, the material guiding ring assembly comprising a first material guiding ring, a second material guiding ring, a third material guiding ring, a fourth material guiding ring and a fifth material guiding ring sequentially sleeved on the side of the storage core facing the inner wall of the storage cylinder, the first material guiding ring and the storage core having a first material passing channel therebetween, the first material guiding ring and the second material guiding ring having a second material passing channel therebetween, the second material guiding ring and the third material guiding ring having a third material passing channel therebetween, the third material guiding ring and the fourth material guiding ring having a fourth material passing channel therebetween, the fourth material guiding ring and the fifth material guiding ring having a fifth material passing channel therebetween, and the fifth material guiding ring and the storage cylinder having a sixth material passing channel therebetween;

[0009] a transparent ring disposed in the storage cylinder and capable of rotating circumferentially relative to the storage cylinder;

[0010] at least one adjusting member for driving the transparent ring to rotate circumferentially relative to the storage cylinder; and

[0011] an extrusion die connected to the lower end of the storage cylinder and having an extrusion channel;

[0012] The transparent ring has a connected feed channel and a discharge channel. A co-extrusion channel is also formed between the storage core and the storage cylinder. The co-extrusion channel is connected to the extrusion channel and the first, second, third, fourth, fifth, and sixth material flow channels and the discharge channel.

[0013] By adopting the above technical solution, the five sequentially nested guide rings in the guide ring assembly, combined with the storage cylinder and storage core, form six spaced-apart material channels. This allows for the simultaneous or independent input of up to six materials, satisfying the blow molding requirements of various hollow plastic containers. Furthermore, the included transparent ring facilitates the input of the liquid level line material and displays it within the molded hollow plastic container, enabling easy observation of the internal solution level and enhancing the functionality of the molded product.

[0014] Preferably, the storage cylinder includes a cylinder body and an upper flange and a lower flange connected to the upper and lower ends of the cylinder body, the extrusion die is connected to the lower flange, and the co-extrusion channel is formed between the lower flange and the storage core.

[0015] By adopting the above technical solution, the split-type storage cylinder is easy to process and maintain independently.

[0016] Preferably, it further includes a pressure ring, wherein the lower flange has an annular mounting groove on its upper end face, the transparent ring is disposed in the mounting groove, the pressure ring connects the cylinder body and the lower flange, and the lower end face of the pressure ring abuts against the transparent ring.

[0017] By adopting the above technical solution, the combined action of the pressure ring and the lower flange can limit the radial and axial movement of the transparent ring, thereby improving the limiting effect on the transparent ring.

[0018] Preferably, the transparent ring comprises:

[0019] The disc body, wherein at least one adjustment port is provided on the outer peripheral surface, and

[0020] The distributor is connected to the inner ring wall of the disc body, and the distributor has a discharge port that connects the discharge channel and the co-extrusion channel.

[0021] One end of the adjustment port is detachably connected to a pressing block; the end of the adjustment member extends into the adjustment port and abuts against the pressing block.

[0022] By adopting the above technical solution, when the transparent ring rotates circumferentially relative to the storage cylinder, the end of the adjusting component acts on the extrusion block. The extrusion block is detachably connected to the disc body. Therefore, when the transparent ring is used for a period of time, the extrusion block can be directly replaced when it wears out, without the need to repair and replace the entire transparent ring, thereby reducing the maintenance cost after the transparent ring has been used for a long time.

[0023] Preferably, the disc body has a locking hole on its outer peripheral surface that connects to the adjustment port, and the extrusion block is locked in the locking hole. The extrusion block is a cylindrical extrusion block.

[0024] By adopting the above technical solution, the extrusion block is connected to the disc body in a snap-fit ​​manner, which facilitates assembly and disassembly. At the same time, the machining of the snap-fit ​​hole is relatively simple, reducing processing costs. Furthermore, when the cylindrical extrusion block and the adjusting component are in contact, they are in line contact. When the transparent ring rotates circumferentially relative to the storage cylinder, the cylindrical extrusion block remains in line contact with the adjusting component. Compared to existing surface contact connections, this reduces the possibility of misalignment and also reduces the machining difficulty and cost of the transparent ring. This is because when the adjusting component and the extrusion block are in surface contact, as the transparent ring rotates circumferentially, the outer surface of the extrusion block needs to be constantly in contact with the end of the adjusting component. This requires calculating the curvature of the outer surface to match the rotation path of the transparent ring. Otherwise, if the adjusting component and the extrusion block slide relative to each other, misalignment of the adjusting component is likely to occur. The adjusting component needs to travel a greater distance to contact the outer surface of the extrusion block. During this travel, the pushing force of the adjusting component cannot act on the extrusion block to advance the rotation of the transparent ring.

[0025] Preferably, the distributor includes a distributing section and a collecting section. The distributing section extends away from the co-extrusion channel and has a diversion surface at a certain angle. The collecting section extends towards the co-extrusion channel and has a collecting surface at a certain angle. One end of the discharge channel extends to the collecting section.

[0026] By adopting the above technical solution, the material distribution section with a certain angled flow surface can enable the material to continue flowing downward along the flow surface while being separated, and when the flow converges at the flow convergence surface, it can converge towards the center and converge with the transparent line material to achieve separation and combination.

[0027] Preferably, the outer circumferential surface of the storage cylinder is provided with a threaded hole that connects to the adjustment port, and the adjustment component is connected to the threaded hole.

[0028] By adopting the above technical solution, after the adjusting component is connected to the threaded hole, the adjusting component can be pushed toward the extrusion block by rotating the adjusting component. The threaded connection method has a certain degree of self-locking and ensures a certain degree of adjustment accuracy.

[0029] Preferably, the extrusion die includes:

[0030] A die, wherein the die has a cavity with an opening on one side;

[0031] The core mold is housed within the die and has a gap with the inner wall of the die to form the extrusion channel;

[0032] The continuous multi-layer blow molding machine die head also includes a core adjusting rod and a driving component connected to one end of the core adjusting rod and used to drive the core adjusting rod to slide axially relative to the storage core. The other end of the core adjusting rod extends into the storage core and is connected to the core mold.

[0033] By adopting the above technical solution, the adjusting rod drives the core mold to move relative to the die under the pull of the second driving component. During the relative displacement between the two, the diameter of the outlet of the extrusion channel is changed, thereby changing the wall thickness of the molded product.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By setting up 5 interlocking guide rings in combination with the storage core and storage cylinder to form 6 material channels, up to 6 materials can be fed into the die head simultaneously or in independent combinations, which can meet the molding needs of more products; at the same time, the setting of transparent rings makes the molded products have liquid level lines, which also improves the practicality of the products.

[0036] 2. By adding a detachable squeezing block to replace the disc body directly contacting the adjustment component, only the squeezing block needs to be replaced after long-term use, reducing the maintenance and replacement cost of the transparent ring. Attached Figure Description

[0037] Figure 1 A cross-sectional view of a continuous multi-layer blow molding die head with transparent lines;

[0038] Figure 2 A schematic diagram of a continuous multi-layer blow molding machine die head with transparent lines;

[0039] Figure 3 This diagram mainly shows the installation of the transparent ring and adjusting element on the lower flange;

[0040] Figure 4 This is a schematic diagram of the transparent ring structure;

[0041] Figure 5 This is a cross-sectional view of the transparent ring.

[0042] Explanation of reference numerals in the attached drawings: 1. Storage cylinder; 11. Upper flange; 12. Cylinder body; 13. Lower flange; 131. Co-extrusion channel; 132. Threaded hole; 14. First feeding channel; 15. Second feeding channel; 16. Third feeding channel; 17. Fourth feeding channel; 18. Fifth feeding channel; 19. Sixth feeding channel; 2. Storage core; 31. First guide ring; 32. Second guide ring; 33. Third guide ring; 34. Fourth guide ring; 35. Fifth guide ring 4. Transparent ring; 41. Disc body; 411. Feed channel; 412. Adjustment port; 413. Clip hole; 414. Discharge channel; 42. Distributor; 421. Dividing surface; 422. Converging surface; 423. Discharge port; 43. Extrusion block; 5. Adjusting component; 6. Extrusion die; 61. Die; 62. Core die; 63. Extrusion channel; 7. Core adjusting rod; 8. Pressure ring; 81. Feed port; 9. Die sleeve; 10. Transparent line material extruder; 20. Drive component. Detailed Implementation

[0043] The present application will be further described in detail below with reference to the accompanying drawings.

[0044] 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.

[0045] 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.

[0046] Figure 1 and Figure 2 The diagram illustrates the structure of a continuous multi-layer blow molding die head with transparent lines, including a split storage cylinder 1 and a storage core 2 partially housed within the storage cylinder 1. The storage cylinder 1 includes a generally cylindrical cylinder body 12 and an upper flange 11 and a lower flange 13 connected to the upper and lower end faces of the cylinder body 12. The cylinder body 12 is connected to the upper flange 11 and the lower flange 13 by long bolts. In this embodiment, the storage cylinder 1 has a hollow cavity, and the storage core 2 is partially housed within the cavity, with one end extending out of the cavity and connected to the upper flange 11.

[0047] This die head also includes a guide ring assembly, which is also housed within the cavity of the storage cylinder 1 and circumferentially surrounds the outer peripheral surface of the storage core 2. The guide ring assembly includes a first guide ring 31, a second guide ring 32, a third guide ring 33, a fourth guide ring 34, and a fifth guide ring 35, which are sequentially fitted from the storage core 2 toward the inner wall of the storage cylinder 1. There is a first material flow channel 14 between the first guide ring 31 and the storage core 2, a second material flow channel 15 between the first guide ring 31 and the second guide ring 32, a third material flow channel 16 between the second guide ring 32 and the third guide ring 33, a fourth material flow channel 17 between the third guide ring 33 and the fourth guide ring 34, a fifth material flow channel 18 between the fourth guide ring 34 and the fifth guide ring 35, and a sixth material flow channel 19 between the fifth guide ring 35 and the storage cylinder 1. The six material flow channels are spaced apart from each other and are independent. Each material flow channel is connected to an external screw extruder to receive functional materials input from the screw extruder.

[0048] This die head also includes a transparent ring 4, a pressure ring 8, a core adjusting rod 7, and an extrusion die 6. The pressure ring 8 is connected between the cylinder body 12 and the lower flange 13. The transparent ring 4 is installed between the pressure ring 8 and the lower flange 13. The lower flange 13 has a mounting groove on its upper end face. The transparent ring 4 is located in the mounting groove, and the pressure ring 8 abuts against the upper end face of the transparent ring 4, thereby limiting the entire transparent ring 4 in the radial and axial directions.

[0049] The adjusting rod 7 is partially housed within the inner hole of the storage core 2, with both ends extending above the end of the storage core 2. One end of the adjusting rod 7 is connected to a driving component 20, and the other end is connected to the extrusion die 6. In this embodiment, the driving component 20 is a hydraulic cylinder. The extrusion die 6 is connected to the lower end of the lower flange 13 and includes a die 61 and a core die 62 housed within the die 61. The die 61 is threaded to a die sleeve 9 on its outer circumferential surface and pressed against the lower flange 13. The core die 62 is connected to the adjusting rod 7, and a gap exists between the die 61 and the core die 62 to form an extrusion channel 63. The adjusting rod 7 can be driven by the driving component 20 to slide axially relative to the storage core 2, thereby synchronously driving the core die 62 to slide axially relative to the die 61. When the die 61 and the core die 62 slide relative to each other, they change the size of the extrusion channel 63 at various positions, thereby controlling the wall thickness of the blow-molded product.

[0050] In this embodiment, a co-extrusion channel 131 is formed by a gap between the inner wall of the lower flange 13 and the outer wall of the storage core 2. The co-extrusion channel 131 is used to connect the extrusion channel 63 and the first to sixth material passages 19.

[0051] Combination Figures 3 to 5The transparent ring 4 includes a cylindrical disc 41 and a distributor 42 connected to the inner peripheral wall of the disc 41. The disc 41 has a feed channel 411 on its upper surface and a discharge channel 414 radially connected to the feed channel 411. In this embodiment, the pressure ring 8 has a feed inlet 81 connected to the feed channel 411. The feed inlet 81 is connected to the transparent material extruder 10, and the discharge channel 414 is connected to the co-extrusion channel 131. Therefore, this die head can accept up to six independent material inputs as well as transparent material for forming liquid level lines.

[0052] The distributor 42 extends into the co-extrusion channel 131, forcing some material to be diverted by the distributor 42, thereby avoiding mixing with transparent material. The distributor 42 includes an integrated distributing section and a collecting section. The distributing section extends away from the co-extrusion channel 131 and has a diversion surface 421 at a certain angle. The collecting section extends towards the co-extrusion channel 131 and has a collecting surface 422 at a certain angle. One end of the discharge channel 414 extends to the collecting section, and the discharge port 423 is also located at the collecting section.

[0053] In this embodiment, the transparent ring 4 can rotate circumferentially relative to the storage cylinder 1 to adjust the circumferential position of the discharge port 423. Specifically, at least one adjusting member 5 is threadedly connected to the lower flange 13 of this die head. The adjusting member 5 is an adjusting screw, and the lower flange 13 has a threaded hole 132 that is threadedly connected to the adjusting member 5. The disc body 41 has an adjusting port 412 communicating with the threaded hole 132 and a retaining hole 413 communicating with the adjusting port 412 on its outer peripheral surface. The retaining hole 413 is located at one end of the adjusting port 412, and an extrusion block 43 is clamped in the retaining hole 413. The extrusion block 43 is a cylindrical extrusion block 43. One end of the adjusting member 5 extends into the adjusting port 412 and abuts against the extrusion block 43. By rotating the adjusting member 5, the adjusting member 5 is pushed to move axially toward the extrusion block 43 and finally pushes the transparent ring 4 to rotate circumferentially relative to the storage cylinder 1. In this embodiment, the extrusion block 43 is made of plastic material, which can reduce the extrusion wear between the extrusion block 43 and the adjusting member 5 and the disc 41. After a period of use, the extrusion block 43 can be replaced without replacing the entire transparent ring 4, thus reducing maintenance costs.

[0054] 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 continuous multi-layer blow molding machine die head with transparent lines, characterized in that, include: Storage cylinder (1); The storage core (2) is partially housed in the storage cylinder (1); The guide ring assembly includes a first guide ring (31), a second guide ring (32), a third guide ring (33), a fourth guide ring (34), and a fifth guide ring (35) sequentially sleeved from the storage core (2) toward the inner wall of the storage cylinder (1). The first guide ring (31) has a first material passage (14) between it and the storage core (2), the first guide ring (31) has a second material passage (15) between it and the second guide ring (32), the second guide ring (32) has a third material passage (16) between it and the third guide ring (33), the third guide ring (33) has a fourth material passage (17) between it and the fourth guide ring (34), the fourth guide ring (34) has a fifth material passage (18) between it and the fifth guide ring (35), and the fifth guide ring (35) has a sixth material passage (19) between it and the storage cylinder (1). A transparent ring (4) is placed inside the storage cylinder (1) and can rotate circumferentially relative to the storage cylinder (1); At least one adjusting element (5) is used to drive the transparent ring (4) to rotate circumferentially relative to the storage cylinder (1); and The extrusion die (6) is connected to the lower end of the storage cylinder (1) and has an extrusion channel (63). The transparent ring (4) has a connected feed channel (411) and discharge channel (414). A co-extrusion channel (131) is also formed between the storage core (2) and the storage cylinder (1). The co-extrusion channel (131) is connected to the extrusion channel (63) and the first feeding channel (14), the second feeding channel (15), the third feeding channel (16), the fourth feeding channel (17), the fifth feeding channel (18), the sixth feeding channel (19) and the discharge channel (414).

2. The continuous multi-layer blow molding machine die head with transparent lines according to claim 1, characterized in that, The storage cylinder (1) includes a cylinder body (12) and an upper flange (11) and a lower flange (13) connected to the upper and lower ends of the cylinder body (12). The extrusion die (6) is connected to the lower flange (13), and the co-extrusion channel (131) is formed between the lower flange (13) and the storage core (2).

3. A continuous multi-layer blow molding die head with transparent lines according to claim 2, characterized in that, It also includes a pressure ring (8), the lower flange (13) has an annular mounting groove on its upper end face, the transparent ring (4) is located in the mounting groove, the pressure ring (8) connects the cylinder body (12) and the lower flange (13), and the lower end face of the pressure ring (8) abuts against the transparent ring (4).

4. A continuous multi-layer blow molding machine die head with transparent lines according to claim 1 or 2, characterized in that, The transparent ring (4) includes: The disc body (41) has at least one adjustment port (412) on its outer peripheral surface, and The distributor (42) is connected to the inner ring wall of the disc (41). The distributor (42) has a discharge port (423) that connects the discharge channel (414) and the co-extrusion channel (131). One end of the adjustment port (412) is detachably connected to a pressing block (43); the end of the adjustment member (5) extends into the adjustment port (412) and abuts against the pressing block (43).

5. A continuous multi-layer blow molding machine die head with transparent lines according to claim 4, characterized in that, The disc body (41) has a card hole (413) on its outer peripheral surface that connects to the adjustment port (412). The extrusion block (43) is inserted into the card hole (413). The extrusion block (43) is a cylindrical extrusion block (43).

6. A continuous multi-layer blow molding die head with transparent lines according to claim 4, characterized in that, The distributor (42) includes a distributing section and a collecting section. The distributing section extends away from the co-extrusion channel (131) and has a diversion surface (421) at a certain angle. The collecting section extends towards the co-extrusion channel (131) and has a collecting surface (422) at a certain angle. One end of the discharge channel (414) extends to the collecting section.

7. A continuous multi-layer blow molding machine die head with transparent lines according to claim 4, characterized in that, The outer circumferential surface of the storage cylinder (1) is provided with a threaded hole (132) for connecting the adjustment port (412), and the adjustment component (5) is connected to the threaded hole (132).

8. A continuous multi-layer blow molding machine die head with transparent lines according to claim 1, characterized in that, The extrusion die (6) includes: Die (61), the die (61) having a cavity with an opening on one side; The core mold (62) is housed within the die (61) and has a gap with the inner wall of the die (61) to form the extrusion channel (63). The continuous multi-layer blow molding machine die head also includes a core adjusting rod (7) and a drive component (20) connected to one end of the core adjusting rod (7) and used to drive the core adjusting rod (7) to slide axially relative to the storage core (2). The other end of the core adjusting rod (7) extends into the storage core (2) and is connected to the core mold (62).

Images