Full-hot-runner multi-mold-cavity PET plastic bottle blank injection molding mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a full-hot-runner multi-mold-cavity PET plastic bottle blank injection molding mold. The bottle blank forming mold comprises a bottle blank forming lower mold, a bottle blank forming middle mold and a bottle blank forming upper mold, and an injection molding fixing plate is arranged above the bottle blank forming upper mold. In the injection molding process, the bottle blank forming lower mold, the bottle blank forming middle mold and the bottle blank forming upper mold are attached, the injection molding fixing plate is used for fixing the injection molding barrel fixing sleeve, the injection molding barrel fixing sleeve is used for fixing the spiral full-hot-runner injection molding assembly, and in the injection molding process, molten materials are injected into a cavity through the spiral full-hot-runner injection molding assembly. Internal direct connection is combined with external threaded connection hot runner injection, the full hot runner structure can greatly accelerate the injection molding speed, increase the injection molding flow and improve the uniformity of plastic parts, after injection molding is completed, the outer side cooling part is matched with cooling liquid to conduct all-directional cooling on the molded plastic parts, and the cooling area is large.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a full hot runner multi-cavity PET plastic bottle blank injection molding mold. Background Art

[0002] In industrial production, various molds and tools are used to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, a mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. In the injection molding process, the existing PET plastic bottle blank injection molding mold generally uses a single flow channel, the injection flow rate is small, the injection rate is full, and once the injection time becomes long, it is difficult to ensure the uniformity of the plastic part. Therefore, it is urgent to design a full hot runner multi-cavity PET plastic bottle blank injection molding mold that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a full hot runner multi-cavity PET bottle blank mold [application number: 202022261783.2]. A card plate is fixedly installed on the lower wall of the abutment plate, and a magnet 2 is fixedly installed on the lower wall of the card plate. A deformable clip is fixedly installed on the side of the outer cylindrical wall of the card plate that is away from each other. A tension spring is fixedly installed inside the clip. The hot plastic is sprayed into the mold cavity through a nozzle for cooling and forming. The motor is connected to an external power supply device. The motor drives magnet 1 to rotate on the lower side of the mold cavity. Magnet 1 and magnet 2 repel each other. When magnet 1 rotates to a position corresponding to magnet 2, the card plate is subjected to the upward repulsive force generated by magnet 2 and magnet 1, the clip is squeezed, and the tension spring deforms to generate a force. The clip drives the card plate to move upward between the two limit blocks. When the card plate moves upward, it will drive the upper end of the mold formed inside the mold cavity to detach from the inside of the mold cavity. Summary of the invention

[0004] The utility model aims to solve the above problems and provides a full hot runner multi-cavity PET plastic bottle preform injection molding die.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A full hot runner multi-cavity PET plastic bottle blank injection molding mold, comprising a bottle blank molding lower mold, a bottle blank molding middle mold and a bottle blank molding upper mold, an injection molding fixed plate is arranged above the bottle blank molding upper mold, a plurality of cavity fixed lower cavities are arranged in the bottle blank molding lower mold, a plurality of cavity fixed middle cavities are arranged in the bottle blank molding middle mold, a plurality of cavity fixed upper cavities are arranged in the bottle blank molding upper mold, a plurality of injection molding barrel fixing sleeves are arranged in the injection molding fixed plate, a spiral full hot runner injection molding component extending into the cavity fixed upper cavity is arranged in the injection molding barrel fixing sleeve, an outer cooling part is arranged below the injection molding barrel fixing sleeve, and the spiral full hot runner injection molding component is sleeved in the outer cooling part.

[0007] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the spiral full hot runner injection molding component includes a bottle blank injection molding cylinder arranged in an injection cylinder fixed sleeve and extending into the fixed upper cavity of the mold cavity, a central heat flow guide rod is arranged in the bottle blank injection molding cylinder, a central heat flow guide rod is arranged in the central heat flow guide rod, and a central heat flow injection part passing through the central heat flow guide rod is arranged in the central heat flow guide rod, and a spiral heat flow injection part is arranged on the outside of the central heat flow guide rod.

[0008] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the central hot flow injection part includes a central hot runner arranged in the central hot flow guide rod, and the bottom of the central hot runner is provided with a plurality of bottom side openings distributed in an arc array along the center line of the central hot runner, and the bottom side openings are in an inverted V shape.

[0009] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the spiral hot flow injection part includes a spiral hot runner groove arranged outside the central hot flow guide rod, and the spiral hot runner groove corresponds to the position of the bottom opening.

[0010] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the outer cooling part includes a cooling outer cylinder arranged below the injection cylinder fixing sleeve, a spiral cooling water channel is provided on the outside of the cooling outer cylinder, and the bottle blank injection molding cylinder is located in the cooling outer cylinder.

[0011] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the cooling outer cylinder and the injection cylinder fixing sleeve are connected through the first connecting sleeve and the second connecting sleeve.

[0012] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the bottom sleeve of the cooling outer cylinder is provided with a supporting bottom sleeve, and the supporting bottom sleeve is located below the bottle blank injection molding cylinder.

[0013] In the above-mentioned full hot runner multi-cavity PET plastic preform injection molding mold, two connecting vertical plates are provided between the injection fixing plate and the preform molding upper mold.

[0014] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the connecting vertical plate passes through the injection molding fixed plate and the bottom of the connecting vertical plate extends into the bottle blank molding upper mold.

[0015] In the above-mentioned full hot runner multi-cavity PET plastic bottle blank injection molding mold, the inner diameter of the cooling outer cylinder is larger than the outer diameter of the bottle blank injection molding cylinder.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. In the injection molding process of the utility model, the lower mold for bottle blank molding, the middle mold for bottle blank molding and the upper mold for bottle blank molding are fitted together, the injection molding fixing plate is used to fix the injection molding cylinder fixing sleeve, and the injection molding cylinder fixing sleeve is used to fix the spiral full hot runner injection molding component. In the injection molding process, the molten material is injected into the mold cavity through the spiral full hot runner injection molding component, and the internal straight-through combined with the external screw-connected hot runner injection is adopted. The full hot runner structure can greatly accelerate the injection molding rate, increase the injection molding flow rate, and improve the uniformity of the plastic parts. After the injection molding is completed, the molded plastic parts are cooled in all directions through the outer cooling part in combination with the coolant, and the cooling area is large.

[0018] 2. After the injection molding is completed, the utility model passes the cooling water into the spiral cooling water channel, adopts the spiral cooling structure, has a large cooling area and a good cooling effect.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a partial structural schematic diagram of the utility model.

[0022] Figure 3 It is a partial structural schematic diagram of the utility model in another direction.

[0023] Figure 4 It is a partial structural schematic diagram of the utility model in another direction.

[0024] Figure 5 It is a structural schematic diagram of a spiral full hot runner injection molding component.

[0025] In the figure: a preform molding lower mold 1, a preform molding middle mold 2, a preform molding upper mold 3, an injection molding fixed plate 4, a cavity fixed lower cavity 5, a cavity fixed middle cavity 6, a cavity fixed upper cavity 7, an injection molding cylinder fixed sleeve 8, a spiral full hot runner injection molding component 9, an outer cooling part 10, a central heat flow guide rod 11, a central heat flow injection part 12, a spiral heat flow injection part 13, a central hot runner 14, a bottom opening 15, a spiral hot runner groove 16, a cooling outer cylinder 17, a spiral cooling water channel 18, a first connecting sleeve 188, a second connecting sleeve 19, a supporting bottom sleeve 20, and a connecting vertical plate 21. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-5 As shown, a full hot runner multi-cavity PET plastic bottle blank injection molding mold comprises a bottle blank molding lower mold 1, a bottle blank molding middle mold 2 and a bottle blank molding upper mold 3, an injection molding fixed plate 4 is arranged above the bottle blank molding upper mold 3, a plurality of cavity fixed lower cavities 5 are arranged in the bottle blank molding lower mold 1, a plurality of cavity fixed middle cavities 6 are arranged in the bottle blank molding middle mold 2, a plurality of cavity fixed upper cavities 7 are arranged in the bottle blank molding upper mold 3, a plurality of injection molding tube fixing sleeves 8 are arranged in the injection molding fixed plate 4, a spiral full hot runner injection molding component 9 extending into the cavity fixed upper cavity 7 is arranged in the injection molding tube fixing sleeve 8, an outer cooling part 10 is arranged below the injection molding tube fixing sleeve 8, and the spiral full hot runner injection molding component 9 is sleeved in the outer cooling part 10.

[0028] In this embodiment, during the injection molding process, the preform molding lower mold 1, the preform molding middle mold 2 and the preform molding upper mold 3 are fitted together, the injection molding fixing plate 4 is used to fix the injection molding tube fixing sleeve 8, and the injection molding tube fixing sleeve 8 is used to fix the spiral full hot runner injection molding component 9. During the injection molding process, the molten material is injected into the mold cavity through the spiral full hot runner injection molding component 9, and the internal straight-through combined with the external screw-connected hot runner injection is adopted. The full hot runner structure can greatly accelerate the injection molding rate, increase the injection molding flow rate, and improve the uniformity of the plastic parts. After the injection molding is completed, the molded plastic parts are cooled in all directions through the outer cooling part 10 in combination with the coolant, and the cooling area is large.

[0029] Combination Figure 1-5 As shown, the spiral full hot runner injection molding component 9 includes a bottle blank injection molding cylinder 10a which is arranged in an injection molding cylinder fixing sleeve 8 and extends into the fixed upper cavity 7 of the mold cavity, and a central heat flow guide rod 11 is arranged in the bottle blank injection molding cylinder 10a, and a central heat flow guide rod 11 is arranged in the central heat flow guide rod 11. A central heat flow injection part 12 that passes through the central heat flow guide rod 11 is arranged in the central heat flow guide rod 11, and a spiral heat flow injection part 13 is arranged on the outer side of the central heat flow guide rod 11.

[0030] Specifically, the preform injection molding cylinder 10a is used to assist in molding plastic parts. During injection molding, the molten material is injected into the mold cavity through the central hot flow injection part 12 and the spiral hot flow injection part 13 in the central hot flow guide rod 11, and an internal straight-through combined with an external screw-connected hot runner injection is adopted. The full hot runner structure can greatly speed up the injection molding rate, increase the injection molding flow rate, and improve the uniformity of the plastic parts.

[0031] Combination Figure 3 , Figure 5 As shown, the central heat flow injection portion 12 includes a central hot runner 14 arranged in the central heat flow guide rod 11, and the bottom of the central hot runner 14 is provided with a plurality of bottom openings 15 distributed in an arc array along the center line of the central hot runner 14, and the bottom openings 15 are in an inverted V shape.

[0032] In this embodiment, during injection molding, part of the molten material is injected through the central hot runner 14 and flows into the cavity from the bottom side through the bottom opening 15, and a one-out-many structure is adopted to speed up the injection molding rate.

[0033] The spiral heat flow injection portion 13 includes a spiral hot runner groove 16 disposed outside the central heat flow guide rod 11 , and the spiral hot runner groove 16 corresponds to the position of the bottom opening 15 .

[0034] In this embodiment, during injection molding, part of the molten material is fed spirally through the spiral hot runner groove 16 to avoid blockage of the molten material, increase the injection molding flow rate, and improve the uniformity of the plastic part.

[0035] Combination Figure 4 As shown, the outer cooling part 10 includes a cooling outer cylinder 17 disposed below the injection cylinder fixing sleeve 8 , a spiral cooling water channel 18 is disposed outside the cooling outer cylinder 17 , and the preform injection molding cylinder 10 a is located inside the cooling outer cylinder 17 .

[0036] In this embodiment, after the injection molding is completed, cooling water is introduced into the spiral cooling water channel 18, and a spiral cooling structure is adopted, which has a large cooling area and a good cooling effect.

[0037] The cooling outer cylinder 17 is connected to the injection cylinder fixing sleeve 8 via a first connecting sleeve 188 and a second connecting sleeve 19 .

[0038] In this embodiment, the cooling outer cylinder 17 is connected to the injection cylinder fixing sleeve 8 via the first connecting sleeve 188 and the second connecting sleeve 19, and the fixing effect is good.

[0039] A supporting bottom sleeve 20 is sleeved on the bottom of the cooling outer cylinder 17 , and the supporting bottom sleeve 20 is located below the preform injection molding cylinder 10 a .

[0040] In this embodiment, the supporting bottom sleeve 20 is used to fix the preform injection molding cylinder 10a.

[0041] Combination Figure 2 As shown, two connecting vertical plates 21 are provided between the injection molding fixed plate 4 and the bottle blank molding upper mold 3 , and the connecting vertical plates 21 penetrate through the injection molding fixed plate 4 and the bottom of the connecting vertical plates 21 extends into the bottle blank molding upper mold 3 .

[0042] In this embodiment, the connecting vertical plate 21 is used to connect the injection molding fixing plate 4 with the preform molding upper mold 3 .

[0043] Combination Figure 4 As shown, the inner diameter of the cooling outer cylinder 17 is larger than the outer diameter of the preform injection molding cylinder 10a.

[0044] In this embodiment, the inner diameter of the cooling outer cylinder 17 is larger than the outer diameter of the preform injection molding cylinder 10a, which facilitates injection molding.

[0045] The working principle of the utility model is:

[0046] During the injection molding process, the preform molding lower mold 1, the preform molding middle mold 2 and the preform molding upper mold 3 are fitted together, the injection molding fixing plate 4 is used to fix the injection molding cylinder fixing sleeve 8, and the preform injection molding cylinder 10a is used to assist in molding plastic parts. During injection molding, part of the molten material is injected through the central hot runner 14 and flows into the mold cavity from the bottom side through the bottom side opening 15. The one-out-multiple structure is adopted to speed up the injection molding rate. Part of the molten material is fed in a spiral manner through the spiral hot runner groove 16 to avoid blockage of the molten material, increase the injection molding flow rate, and improve the uniformity of the plastic parts.

[0047] After the injection molding is completed, the cooling water is passed into the spiral cooling water channel 18. The spiral cooling structure has a large cooling area and a good cooling effect.

[0048] The cooling outer cylinder 17 is connected to the injection cylinder fixing sleeve 8 through the first connecting sleeve 188 and the second connecting sleeve 19, and the fixing effect is good.

[0049] The supporting bottom sleeve 20 is used to fix the preform injection molding cylinder 10a, and the connecting vertical plate 21 is used to connect the injection molding fixing plate 4 with the preform molding upper mold 3.

[0050] The inner diameter of the cooling outer cylinder 17 is larger than the outer diameter of the preform injection molding cylinder 10a, which facilitates injection molding.

[0051] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0052] Although the following terms are used more frequently in this article, such as preform molding lower mold 1, preform molding middle mold 2, preform molding upper mold 3, injection molding fixed plate 4, cavity fixed lower cavity 5, cavity fixed middle cavity 6, cavity fixed upper cavity 7, injection molding cylinder fixed sleeve 8, spiral full hot runner injection molding assembly 9, outer cooling part 10, central heat flow guide rod 11, central heat flow injection part 12, spiral heat flow injection part 13, central hot runner 14, bottom opening 15, spiral hot runner groove 16, cooling outer cylinder 17, spiral cooling water channel 18, first connecting sleeve 188, second connecting sleeve 19, supporting bottom sleeve 20, connecting vertical plate 21, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A full hot runner multi-cavity PET plastic bottle preform injection molding mold, comprising a bottle preform molding lower mold (1), a bottle preform molding middle mold (2) and a bottle preform molding upper mold (3), characterized in that: An injection molding fixed plate (4) is arranged above the preform molding upper mold (3), a plurality of cavity fixed lower cavities (5) are arranged in the preform molding lower mold (1), a plurality of cavity fixed middle cavities (6) are arranged in the preform molding middle mold (2), a plurality of cavity fixed upper cavities (7) are arranged in the preform molding upper mold (3), a plurality of injection molding tube fixed sleeves (8) are arranged in the injection molding fixed plate (4), a spiral full hot runner injection molding component (9) extending into the cavity fixed upper cavity (7) is arranged in the injection molding tube fixed sleeve (8), an outer cooling part (10) is arranged below the injection molding tube fixed sleeve (8), and the spiral full hot runner injection molding component (9) is sleeved in the outer cooling part (10).

2. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 1 is characterized in that: The spiral full hot runner injection molding component (9) comprises a preform injection molding cylinder (10a) arranged in an injection molding cylinder fixing sleeve (8) and extending into a mold cavity fixing upper cavity (7); a central heat flow guide rod (11) is arranged in the preform injection molding cylinder (10a); a central heat flow injection portion (12) passing through the central heat flow guide rod (11) is arranged in the central heat flow guide rod (11); and a spiral heat flow injection portion (13) is arranged on the outer side of the central heat flow guide rod (11).

3. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 2 is characterized in that: The central heat flow injection portion (12) comprises a central hot runner (14) arranged in the central heat flow guide rod (11), and the bottom of the central hot runner (14) is provided with a plurality of bottom openings (15) distributed in an arc array along the center line of the central hot runner (14), and the bottom openings (15) are in an inverted V shape.

4. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 3 is characterized in that: The spiral heat flow injection portion (13) comprises a spiral hot flow channel groove (16) arranged outside the central heat flow guide rod (11), and the spiral hot flow channel groove (16) corresponds to the position of the bottom opening (15).

5. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 4, characterized in that: The outer cooling part (10) comprises a cooling outer cylinder (17) arranged below the injection cylinder fixing sleeve (8), a spiral cooling water channel (18) is arranged on the outer side of the cooling outer cylinder (17), and the preform injection molding cylinder (10a) is located inside the cooling outer cylinder (17).

6. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 5, characterized in that: The cooling outer cylinder (17) and the injection cylinder fixing sleeve (8) are connected via a first connecting sleeve (188) and a second connecting sleeve (19).

7. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 6, characterized in that: The bottom of the cooling outer cylinder (17) is sleeved with a supporting bottom sleeve (20), and the supporting bottom sleeve (20) is located below the preform injection molding cylinder (10a).

8. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 7, characterized in that: Two connecting vertical plates (21) are provided between the injection molding fixing plate (4) and the bottle blank forming upper mold (3).

9. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 8, characterized in that: The connecting vertical plate (21) passes through the injection molding fixing plate (4), and the bottom of the connecting vertical plate (21) extends into the bottle blank molding upper mold (3).

10. The full hot runner multi-cavity PET plastic bottle preform injection molding mold according to claim 9, characterized in that: The inner diameter of the cooling outer cylinder (17) is larger than the outer diameter of the preform injection molding cylinder (10a).

Images