Storage type blow molding machine die head with transparent lines and blow molding machine

Abstract

The utility model discloses a storage type blow molding machine die head with a transparent line and a blow molding machine, the storage type blow molding machine die head comprises a storage cylinder, a storage core, an extrusion die, a transparent ring and an adjusting piece, the transparent ring is axially limited between the storage cylinder and the extrusion die, and the transparent ring can circumferentially rotate relative to the storage cylinder and the extrusion die; the transparent ring is provided with a feeding channel and a discharging channel which is communicated with the feeding channel and the extrusion material channel; the adjusting part is used for driving the transparent ring to circumferentially rotate relative to the material storage cylinder and the extrusion die; wherein the transparent ring comprises a disc body and a distributor connected to the inner wall of the disc body, two adjusting openings are symmetrically formed in the peripheral face of the disc body, and an extrusion block is detachably connected to one end of each adjusting opening; the end of the adjusting piece extends into the adjusting opening and abuts against the extrusion block. The detachable extrusion block is additionally arranged to replace a disc body to directly abut against the adjusting piece, only the extrusion block needs to be replaced after long-time use, and the maintenance and replacement cost of the transparent ring is reduced.

Description

Technical Field

[0001] This application relates to the technical field of blow molding machines, and in particular to a storage-type blow molding machine die head with a transparent line and a blow molding machine. Background Technology

[0002] To blow mold plastic containers with transparent lines (liquid level lines), existing storage die heads typically have a transparent ring inside the die head. The transparent material enters the die head through a dedicated inlet, flows through the transparent ring, and finally, together with the colored material, is extruded from the extrusion channel to form a container with transparent lines.

[0003] To change the position of the transparent line on the container, the transparent ring can typically rotate circumferentially relative to the storage core, thereby adjusting the position of the discharge port on the transparent ring. When adjusting the circumferential rotation of the transparent ring, this is generally achieved by rotating an adjusting bolt threaded to the storage cylinder, which pushes the transparent ring against it. For example, invention patent CN104175531A discloses "a blow molding machine die head capable of producing transparent lines," in which the transparent ring has a column two, the end of which abuts against the side of the column two. Rotating the adjusting bolt compresses the column two, thus pushing the transparent ring to rotate circumferentially.

[0004] Regarding the aforementioned mold head structure, as the blow molding machine replaces and processes different types of containers, the transparent ring is prone to wear and damage due to long-term compression between the transparent ring and the end of the adjusting bolt. This necessitates the replacement of the entire transparent ring, increasing maintenance costs. Utility Model Content

[0005] In order to reduce the maintenance costs of transparent rings, the first objective of this application is to provide a storage-type blow molding die head with transparent lines.

[0006] The technical solution provided in this application for a storage-type blow molding machine die head with a transparent line is as follows:

[0007] A storage-type blow molding die head with a transparent line includes:

[0008] The storage cylinder has a cavity with an opening on one side;

[0009] The storage core is housed within the cavity and forms a storage chamber with the inner wall of the storage cylinder.

[0010] An extrusion die is connected to the lower edge of a storage cylinder, the extrusion die including an extrusion channel communicating with the storage cavity;

[0011] A transparent ring, axially confined between the storage cylinder and the extrusion die, is allowed to rotate circumferentially relative to both the storage cylinder and the extrusion die. The transparent ring has a feeding channel and a discharge channel connecting the feeding channel and the extrusion channel.

[0012] Adjustment component, used to drive the transparent ring to rotate circumferentially relative to the storage cylinder and the extrusion die;

[0013] The transparent ring includes a disc body and a distributor connected to the inner wall of the disc body. The disc body has two symmetrical adjustment ports on its outer circumference. One end of each 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.

[0014] 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.

[0015] Preferably, the outer peripheral surface of the disc body is provided with a locking hole for communicating with the adjustment port, and the squeezing block is disposed in the locking hole.

[0016] By adopting the above technical solution, the extrusion block is connected to the disc body via a snap-fit ​​mechanism, facilitating assembly and disassembly. Furthermore, the machining of the snap-fit ​​holes is relatively simple, reducing processing costs.

[0017] Preferably, the extrusion block is a cylindrical extrusion block.

[0018] By adopting the above technical solution, when the cylindrical extrusion block and the adjusting component are in mutual contact, they are in line contact. When the transparent ring rotates circumferentially relative to the storage cylinder, the cylindrical extrusion block is always in line contact with the adjusting component. Compared with the existing surface contact connection, this can reduce the possibility of slippage and reduce the processing 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, if the outer surface of the extrusion block is required to always be in contact with the end of the adjusting component, the curvature of the outer surface needs to be calculated to match the path of the transparent ring's rotation. Otherwise, when the adjusting component and the extrusion block slide relative to each other, the adjusting component is prone to slippage. The adjusting component needs to move a greater stroke distance to contact the outer surface of the extrusion block. During this stroke, the pushing of the adjusting component cannot act on the extrusion block and thus promote the rotation of the transparent ring.

[0019] Preferably, the extrusion block is a polytetrafluoroethylene (PTFE) extrusion block.

[0020] By adopting the above technical solution, polytetrafluoroethylene (PTFE) material has good high temperature resistance and wear resistance. The working temperature of the die head is around 200℃, while PTFE can be used for a long time at 200-260℃. At the same time, it also has good wear resistance, which can reduce the extrusion wear between the die head and the adjustment parts and the disc, improve the service life, and further reduce maintenance costs.

[0021] Preferably, the distributor is placed inside the storage chamber. The distributor includes a distributing part and a collecting part. The distributing part has a diversion surface at a certain angle on the side near the storage chamber. The collecting part has a collecting surface at a certain angle on the side near the extrusion channel. One end of the discharge channel extends to the collecting part.

[0022] By adopting the above technical solution, the distributor is placed inside the storage chamber, which isolates part of the storage chamber area from the extrusion channel, thus reserving a certain area for the transparent line to flow through. Secondly, the distribution section has a flow-dividing surface with a certain angle, which allows the material to continue flowing downward along the flow-dividing surface while being isolated, and when the flow converges at the confluence surface, it can converge towards the center and merge with the transparent line material to achieve separation and combination.

[0023] Preferred options also include:

[0024] A lower flange, connected to the lower edge of the storage cylinder, having an inlet for communicating with a feeding channel; and

[0025] The pressure ring connects the lower flange to the extrusion die;

[0026] The lower flange has a mounting groove on its lower end face, the transparent ring is located in the mounting groove and the pressure ring abuts against the transparent ring.

[0027] By adopting the above technical solution, the lower flange and pressure ring limit the transparent ring in the vertical direction. The opening of the mounting groove facilitates the installation and positioning of the transparent ring. At the same time, the transparent ring is also limited in the radial direction, reducing the movement of the transparent ring in the vertical and radial directions, improving the accuracy during circumferential rotation, and improving the quality of the molded product.

[0028] Preferably, the outer circumferential surface of the lower flange is provided with a threaded hole for communicating with the adjustment port, and the adjustment component is connected to the threaded hole.

[0029] 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.

[0030] Preferred options also include:

[0031] A guide seat is housed inside a storage cylinder, and there is a gap between the interior of the guide seat and the outer wall of the storage core to form a material passage that connects the storage cavity;

[0032] The pressure ring is placed between the guide seat and the storage cylinder; and

[0033] The first driving component, connected to the pressure ring, is used to drive the pressure ring to move axially relative to the storage cylinder to increase or decrease the volume of the storage chamber.

[0034] By adopting the above technical solution, after the material enters the storage chamber from the material feeding channel, the first driving component drives the pressure ring to compress the material and flow towards the extrusion channel to achieve extrusion molding.

[0035] Preferably, the extrusion die includes:

[0036] A die, wherein the die has a cavity with an opening on one side;

[0037] The core mold is housed within the die and has a gap with the inner wall of the die to form the extrusion channel;

[0038] The storage-type blow molding machine die head also includes a core adjusting rod and a second driving component connected to one end of the core adjusting rod for driving 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.

[0039] 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.

[0040] To reduce maintenance costs for transparent rings, a second objective of this application is to provide a blow molding machine.

[0041] The blow molding machine provided in this application adopts the following technical solution:

[0042] A blow molding machine includes the aforementioned storage-type blow molding die head with transparent lines.

[0043] By adopting the above technical solution, during the transparent line production process for different product requirements, when the adjusting component acts on the transparent ring to rotate circumferentially relative to the storage cylinder, a pressing block that is detachably connected to the disc body replaces the disc body in direct contact with the adjusting component. After long-term use, if the pressing block is worn, only the pressing block needs to be replaced, without the need to repair or replace the entire transparent ring, thus reducing maintenance costs.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] 1. By adding a detachable squeezing block to replace the disc body directly contacting the adjusting parts, only the squeezing block needs to be replaced after long-term use, reducing the maintenance and replacement cost of the transparent ring;

[0046] 2. By using a snap-fit ​​design and a cylindrical extrusion block, a line contact connection can always be achieved with the end of the adjusting component, which can reduce the possibility of the adjusting component slipping when interacting with the adjusting component. Attached Figure Description

[0047] Figure 1This is a cross-sectional view of the accumulator blow molding die head with transparent lines in Example 1;

[0048] Figure 2 This is a schematic diagram of the structure of the storage-type blow molding machine die head with transparent lines in Example 1;

[0049] Figure 3 The first embodiment mainly shows the connection diagram between the adjusting component and the lower flange;

[0050] Figure 4 The first embodiment mainly shows the connection between the transparent ring and the adjusting component;

[0051] Figure 5 This is a schematic diagram of the transparent ring structure in Example 1;

[0052] Figure 6 This is a cross-sectional view of the transparent ring in Example 1.

[0053] Explanation of reference numerals in the attached drawings: 1. Storage cylinder; 11. Storage chamber; 12. Pressure ring; 13. Guide seat; 14. Material passage; 15. First driving component; 2. Storage core; 3. Extrusion die; 31. Die; 32. Core die; 33. Extrusion channel; 4. Transparent ring; 41. Disc; 411. Adjustment port; 412. Clip hole; 413. Extrusion block; 414. Feed channel; 415. Discharge channel; 416. Discharge port; 42. Distributor; 421. Dividing surface; 422. Merging surface; 5. Adjusting component; 6. Adjusting rod; 7. Lower flange; 71. Feed port; 72. Transparent material input module; 73. Threaded hole; 8. Pressure ring; 9. Die sleeve; 10. Connecting screw. Detailed Implementation

[0054] The present application will be further described in detail below with reference to the accompanying drawings.

[0055] 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.

[0056] 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. Example 1

[0057] Figure 1 and Figure 2 The diagram illustrates the structure of a storage-type blow molding machine die head with a transparent line, including a cylindrical storage cylinder 1, a pressure ring 12 and a guide seat 13 housed within the storage cylinder 1, a storage core 2, and an extrusion die 3. One end of the storage core 2 extends out from inside the storage cylinder 1 and is fixed to the upper end face of the storage cylinder 1. The guide seat 13 circumferentially surrounds the outer peripheral surface of the storage core 2 and has a gap between it and the outer surface of the storage core 2 to form a material conveying channel 14. The material conveying channel 14 is connected to a material conveying pipe disposed on the outer wall of the storage cylinder 1.

[0058] The pressing ring 12 is circumferentially surrounding the outer surface of the guide seat 13 and can slide axially relative to the guide seat 13 inside the storage cylinder 1. A storage cavity 11 is formed between the storage cylinder 1 and the storage core 2. The axial sliding of the pressing ring 12 can increase or decrease the volume of the storage cavity 11. The storage cavity 11 is connected to the material passage 14. The pressing ring 12 is connected to the first driving member 15 located at the upper end of the storage cylinder 1. In this embodiment, the first driving member 15 is a hydraulic cylinder. Under the drive of the first driving member 15, the pressing ring 12 can compress the material placed in the storage cavity 11 and push it out of the storage cavity 11.

[0059] The die head also includes a lower flange 7, a pressure ring 8, and a die sleeve 9 installed on the lower edge of the storage cylinder 1. The lower end face of the lower flange 7 is provided with an installation groove, and a transparent ring 4 is provided in the installation groove. The pressure ring 8 abuts against the lower end face of the transparent ring 4, thereby limiting the axial and radial movement of the transparent ring 4. The transparent ring 4 can rotate circumferentially relative to the storage cylinder 1.

[0060] The extrusion die 3 includes an orifice 31 and a core die 32. The orifice 31 is connected to the die sleeve 9. The lower flange 7, the pressure ring 8, and the die sleeve 9 are interconnected by several connecting screws 10 and simultaneously fixed to the lower end face of the storage cylinder 1. The outer peripheral wall of the core die 32 and the inner wall of the orifice 31 are spaced to form an extrusion channel 33. In this embodiment, the end of the storage core 2 extends into the inner ring of the lower flange 7 and the pressure ring 8. The transparent ring 4 surrounds the outer peripheral wall of the storage core 2, so that when the core die 32 slides axially relative to the orifice 31, it will not rub against the inner wall of the transparent ring 4 and cause wear.

[0061] The die head also includes a core adjusting rod 6, one end of which extends into the inner hole of the storage core 2. One end of the core adjusting rod 6 is connected to the core mold 32. The other end of the core adjusting rod 6 extends out from the inner hole of the storage core 2 and is connected to a second driving component. In this embodiment, the second driving component is a linear propulsion device such as a hydraulic cylinder. Driven by the second driving component, the core adjusting rod 6 can slide axially relative to the storage core 2 and drive the core mold 32 to slide relative to the die 31, thereby changing the distance between the outer wall of the die opening of the core mold 32 and the inner wall of the die 31 to control the material forming wall thickness.

[0062] The lower flange 7 is also provided with a feed port 71 on its outer wall for transparent materials to enter. A transparent material input module 72 is connected to the feed port 71. In this embodiment, the transparent material input module 72 is a small screw extrusion device. After the transparent material is poured in by the transparent material input module 72, it is melted and extruded and fed into the lower flange 7 through the feed port 71 and flows into the transparent ring 4. There is a gap between the inner wall of the lower flange 7, the transparent ring 4 and the pressure ring 8 and the outer wall of the end of the storage core 2. The entire extrusion channel 33 flows through the lower flange 7, the transparent ring 4 and the pressure ring 8 and is connected to the storage cavity 11.

[0063] Combination Figures 3 to 5 The transparent ring 4 is cylindrical and includes a disc body 41 and a distributor 42 disposed on the inner ring of the disc body 41. The upper end surface of the disc body 41 is provided with a feeding channel 414 that communicates with the feeding port 71 and a discharge channel 415 that is opened radially along the disc body 41. The discharge channel 415 communicates with the feeding channel 414 and extends to communicate with the discharge port 416 opened at the lower end of the distributor 42.

[0064] Transparent material is brought in from the inlet 71 and flows through the inlet channel 414 and the outlet channel 415, and finally flows out from the outlet 416. The outlet 416 is connected to the extrusion channel 33, so that the transparent material can be combined with ordinary colored material and blow molded from the extrusion channel 33 at the same time.

[0065] To enable the transparent ring 4 to rotate circumferentially relative to the storage cylinder 1, two symmetrically arranged adjusting components 5 are threadedly connected to the outer wall of the lower flange 7. In this embodiment, the adjusting component 5 is an adjusting bolt. A threaded hole 73 is provided on the outer wall of the lower flange 7. The adjusting bolt is threadedly connected to the threaded hole 73 and its end is on the transparent ring 4.

[0066] The disc body 41 has an adjustment port 411 on its outer peripheral wall, which connects to a threaded hole 73. The end of the adjusting member 5 extends into the adjustment port 411. The disc body 41 also has a locking hole 412 on its outer peripheral wall, which connects to the adjustment port 411. A pressing block 413 is locked within the locking hole 412, and the end of the adjusting member 5 abuts against the outer peripheral wall of the pressing block 413. In this embodiment, the pressing block 413 is cylindrical, and the contact between the outer peripheral wall of the pressing block 413 and the end of the adjusting member 5 is a line contact connection. This contact method prevents the adjusting member 5 from slipping when the transparent ring 4 rotates circumferentially. Simultaneously, the pressing block 413 is made of polytetrafluoroethylene (PTFE), which reduces the extrusion wear between the pressing block 413 and the disc body 41 and the adjusting member 5.

[0067] The distributor 42 has a certain thickness and is placed inside the extrusion channel 33. It includes a distribution section and a collection section distributed vertically. The distribution section has a flow-dividing surface 421 with a certain angle on the side near the storage chamber 11. The collection section has a flow-collecting surface 422 with a certain angle on the side near the extrusion channel 33. One end of the discharge channel 415 extends into the collection section.

[0068] When blow molding transparent line products at different positions, this die head only needs to rotate the adjusting component 5 on any side to push the extrusion block 413, causing the entire disc 41 to rotate circumferentially, thus changing the relative position of the discharge port 416 of the distributor 42. After a period of use, the extrusion block 413 will wear out and only needs to be replaced, reducing maintenance and replacement costs. Example 2

[0069] A blow molding machine includes the storage-type blow molding die head with transparent lines as described in Embodiment 1.

[0070] 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 storage-type blow molding machine die head with a transparent line, characterized in that, include: The storage cylinder (1) has a cavity with an opening on one side; The storage core (2) is housed in the cavity and forms a storage cavity (11) with the inner wall of the storage cylinder (1). An extrusion die (3) is connected to the lower edge of the storage cylinder (1), and the extrusion die (3) includes an extrusion channel (33) that communicates with the storage cavity (11). A transparent ring (4) is axially positioned between the storage cylinder (1) and the extrusion die (3) and is capable of circumferential rotation relative to the storage cylinder (1) and the extrusion die (3). The transparent ring (4) has a feeding channel (414) and a discharge channel (415) connecting the feeding channel (414) and the extrusion channel (33). Adjustment component (5) is used to drive the transparent ring (4) to rotate circumferentially relative to the storage cylinder (1) and the extrusion die (3); The transparent ring (4) includes a disc body (41) and a distributor (42) connected to the inner wall of the disc body (41). The disc body (41) has two symmetrical adjustment ports (411) on its outer peripheral surface. One end of the adjustment port (411) is detachably connected to a pressing block (413). The end of the adjustment member (5) extends into the adjustment port (411) and abuts against the pressing block (413).

2. The storage-type blow molding machine die head with transparent lines according to claim 1, characterized in that, The outer circumferential surface of the disc (41) is provided with a card hole (412) for communicating with the adjustment port (411), and the extrusion block (413) is located in the card hole (412).

3. The storage-type blow molding machine die head with transparent lines according to claim 2, characterized in that, The extrusion block (413) is a cylindrical extrusion block.

4. A storage-type blow molding machine die head with a transparent line according to claim 2, characterized in that, The extrusion block (413) is a polytetrafluoroethylene extrusion block.

5. A storage-type blow molding machine die head with a transparent line according to claim 1, characterized in that, The distributor (42) is placed in the storage chamber (11). The distributor (42) includes a distributing part and a collecting part. The distributing part has a diversion surface (421) with a certain angle on the side near the storage chamber (11). The collecting part has a collecting surface (422) with a certain angle on the side near the extrusion channel (33). One end of the discharge channel (415) extends to the collecting part.

6. A storage-type blow molding machine die head with a transparent line according to claim 1, characterized in that, Also includes: The lower flange (7) is connected to the lower edge of the storage cylinder (1), and the lower flange (7) has a feed inlet (71) that connects to the feed channel (414); and A pressure ring (8) is connected to the lower flange (7) and the extrusion die (3); The lower flange (7) has an installation groove on its lower end face, the transparent ring (4) is located in the installation groove and the pressure ring (8) abuts against the transparent ring (4).

7. A storage-type blow molding machine die head with a transparent line according to claim 6, characterized in that, The outer circumferential surface of the lower flange (7) is provided with a threaded hole (73) for communicating with the adjustment port (411), and the adjustment component (5) is connected to the threaded hole (73).

8. A storage-type blow molding machine die head with a transparent line according to claim 1, characterized in that, Also includes: The guide seat (13) is housed in the storage cylinder (1). The interior of the guide seat (13) and the outer wall of the storage core (2) are spaced to form a material passage (14) that connects to the storage cavity (11). The pressing ring (12) is placed between the guide seat (13) and the storage cylinder (1); and The first driving component (15) is connected to the pressure ring (12) for driving the pressure ring (12) to move axially relative to the storage cylinder (1) to increase or decrease the volume of the storage chamber (11).

9. A storage-type blow molding machine die head with a transparent line according to claim 1, characterized in that, The extrusion die (3) includes: The die (31) has a cavity with an opening on one side; The core mold (32) is housed inside the die (31) and has a gap with the inner wall of the die (31) to form the extrusion channel (33). The storage-type blow molding machine die head also includes a core adjusting rod (6) and a second driving component connected to one end of the core adjusting rod (6) for driving the core adjusting rod (6) to slide axially relative to the storage core (2). The other end of the core adjusting rod (6) extends into the storage core (2) and is connected to the core mold (32).

10. A blow molding machine, characterized in that, Including the storage-type blow molding die head with transparent lines as described in any one of claims 1-9.

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