Hot runner valve needle slotting uniform injection molding mechanism for high-speed PET bottle preform mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a hot runner valve needle slotting uniform injection molding mechanism for a high-speed PET bottle preform mold. The valve needle sleeve comprises a valve needle sleeve main body, and a hot runner inlet cylinder is arranged above the valve needle sleeve main body. In the injection molding process, molten materials are injected into the multi-groove uniform injection molding material conveying needle part through the hot runner inlet cylinder body and are discharged through the discharging sleeve head, the sealing element plays a sealing role, and the multi-groove uniform injection molding material conveying needle part adopts a multi-groove synchronous injection molding structure, so that on one hand, the flow of an injection molding opening is increased, and the injection molding efficiency is improved; and on the other hand, materials at the injection molding opening are uniform, the situation of material breakage is avoided, and the quality of plastic parts is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a high-speed PET bottle embryo mold hot runner valve needle slotting uniform injection molding mechanism. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. PET preforms are typical injection molding products, which are easy to transport. They are mostly made of plastic, have uniform texture and good insulation. They are intermediate products of plastic bottles and oil barrels. If you want to produce bottles of different shapes and sizes, you need to make molds of different shapes and sizes according to requirements. Each bottle needs a corresponding matching mold. The design of the mold occupies an important position in the production of bottles and will directly affect the quality, quality and cost of the bottles. In the injection molding process of existing PET molds, the tail end of the hot runner valve needle structure is prone to uneven materials, which causes the material to break and affects the quality of the plastic parts. Therefore, it is urgent to design a high-speed PET preform mold hot runner valve needle slot uniform injection molding mechanism 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 PET bottle embryo mold [application number: 202210871299.2]. By setting a fixed template, a movable template, a No. 1 positioning block, a core, a No. 1 groove, a No. 1 fixed plate, a No. 2 fixed plate, a No. 3 fixed plate, a guide ring, a cavity, and a spring, the movable template moves toward the fixed template to close the mold. After the core enters the guide ring, the No. 1 positioning block immediately reaches the guide ring. When the outer wall of the No. 1 positioning block encounters the inner wall of the guide ring, it will push the inner wall of the guide ring, so that the inner wall of the guide ring is fitted with the outer wall of the No. 1 positioning block, so that the No. 1 positioning block and the guide ring are at the same center, and the core and the No. 1 guide ring are at the same center. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a high-speed PET preform mold hot runner valve needle slot uniform injection molding mechanism.

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

[0006] A high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, comprising a valve needle sleeve body, a hot runner inlet cylinder is arranged above the valve needle sleeve body, a multi-groove uniform injection molding feed needle portion is sleeved at the bottom of the hot runner inlet cylinder and extends into the valve needle sleeve body, a sealing member is arranged between the valve needle sleeve body and the feed needle portion, a discharge sleeve head is arranged at the bottom of the multi-groove uniform injection molding feed needle portion, and the discharge sleeve head is snap-fitted with the valve needle sleeve body.

[0007] In the above-mentioned high-speed PET preform mold hot runner valve needle slotted uniform injection mechanism, the multi-slot uniform injection feeding needle part includes a feeding valve needle arranged at the bottom of the hot runner inlet cylinder, and the tail side end of the feeding valve needle has a plurality of arc-shaped slots, and the arc-shaped slots are arranged vertically.

[0008] In the above-mentioned high-speed PET preform mold hot runner valve needle slot uniform injection molding mechanism, the plurality of arc-shaped slots are distributed in a ring array along the center point of the delivery valve needle.

[0009] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, the bottom of the feed valve needle has a discharge end, and the discharge end passes through the discharge sleeve.

[0010] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, the sealing member includes a sealing inner sleeve arranged between the valve needle sleeve body and the feed needle part, and the bottom of the sealing inner sleeve is conical.

[0011] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, the bottom side of the sealing inner sleeve has a plurality of clamping protrusions, and an empty groove is formed between two adjacent clamping protrusions.

[0012] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, the valve needle sleeve body includes an injection part and a pressurizing part, and the diameter of the injection part is larger than the diameter of the pressurizing part.

[0013] In the above-mentioned high-speed PET preform mold hot runner valve needle slotted uniform injection molding mechanism, the hot runner inlet cylinder has an injection hole groove, and a middle connecting sleeve is provided between the delivery valve needle and the hot runner inlet cylinder.

[0014] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, the material delivery valve needle is also provided with a sealing end head, and the sealing end head is snap-fitted with the injection part.

[0015] In the above-mentioned high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism, a discharge channel is formed between the feed valve needle and the sealing inner sleeve.

[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 molten material is injected into the multi-groove uniform injection feeding needle through the hot runner inlet cylinder, and the material is discharged through the discharge sleeve. The sealing member plays a sealing role. The multi-groove uniform injection feeding needle adopts a multi-groove synchronous injection molding structure. On the one hand, the flow rate of the injection molding port is increased. On the other hand, the material at the injection molding port is more uniform, avoiding the occurrence of material breakage and improving the quality of the plastic parts.

[0018] 2. The molten material in the utility model first enters the injection part and then enters the pressurizing part. The diameter of the pressurizing part is smaller than that of the injection part, which is convenient for pressurization.

[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 structural schematic diagram of the utility model in another direction.

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

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

[0024] In the figure: valve needle sleeve body 1, hot runner inlet cylinder 2, multi-groove uniform injection molding feed needle part 3, seal 4, discharge sleeve head 5, feed valve needle 6, arc groove 7, discharge end 8, sealing inner sleeve 9, clamping protrusion 10, injection part 11, booster part 12, injection hole groove 13, middle connecting sleeve 14, sealing end head 15, discharge channel 16. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, a high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism comprises a valve needle sleeve body 1, a hot runner inlet cylinder 2 is arranged above the valve needle sleeve body 1, a multi-groove uniform injection molding feed needle portion 3 extending into the valve needle sleeve body 1 is sleeved at the bottom of the hot runner inlet cylinder 2, a sealing member 4 is arranged between the valve needle sleeve body 1 and the feed needle portion 3, a discharge sleeve head 5 is arranged at the bottom of the multi-groove uniform injection molding feed needle portion 3, and the discharge sleeve head 5 is snap-fitted with the valve needle sleeve body 1.

[0027] In this embodiment, during the injection molding process, the molten material is injected into the multi-groove uniform injection molding feed needle 3 through the hot runner inlet barrel 2, and the material is discharged through the discharge sleeve 5. The seal 4 plays a sealing role. The multi-groove uniform injection molding feed needle 3 adopts a multi-groove synchronous injection molding structure. On the one hand, it increases the flow rate of the injection molding port. On the other hand, the material at the injection molding port is more uniform, avoiding the occurrence of material breakage and improving the quality of the plastic part.

[0028] Combination Figure 1-4As shown, the multi-groove uniform injection molding feed needle portion 3 includes a feed valve needle 6 arranged at the bottom of the hot runner inlet cylinder 2, and the tail end of the feed valve needle 6 has a plurality of arc-shaped slots 7, and the arc-shaped slots 7 are arranged vertically.

[0029] Specifically, during the injection molding process, the molten material is injected through the feed valve needle 6, which adopts a plurality of arc-shaped slots 7. On the one hand, the flow rate of the injection port is increased during injection molding, and on the other hand, the material at the injection port is more uniform, avoiding material breakage and improving the quality of the plastic part.

[0030] The plurality of arc-shaped slots 7 are distributed in a ring array along the center point of the material delivery valve needle 6 .

[0031] In this embodiment, a plurality of arc-shaped slots 7 are distributed in a circular array along the center point of the delivery valve needle 6, and a multi-slot structure is adopted to further ensure uniform injection molding.

[0032] Combination Figure 3 , Figure 4 As shown, the bottom of the delivery valve needle 6 has a discharge end 8 , and the discharge end 8 passes through the discharge sleeve 5 .

[0033] In this embodiment, the discharging end 8 cooperates with the discharging sleeve 5 to discharge the material.

[0034] The sealing member 4 comprises a sealing inner sleeve 9 arranged between the valve needle sleeve body 1 and the feed needle portion 3, and the bottom of the sealing inner sleeve 9 is conical.

[0035] In this embodiment, the sealing inner sleeve 9 plays a sealing role, and the bottom of the sealing inner sleeve 9 is conical and cooperates with the discharge sleeve head 5.

[0036] Combination Figure 3 As shown, the bottom side of the sealing inner sleeve 9 has a plurality of clamping protrusions 10 , and an empty groove is formed between two adjacent clamping protrusions 10 .

[0037] In this embodiment, the snap-fit ​​protrusion 10 is convenient for snap-fitting with the discharge sleeve 5, and the empty groove is convenient for disassembly and assembly.

[0038] The valve needle sleeve body 1 comprises an injection portion 11 and a pressurizing portion 12 , and the diameter of the injection portion 11 is greater than the diameter of the pressurizing portion 12 .

[0039] In this embodiment, the molten material first enters the injection portion 11 and then enters the pressurizing portion 12. The diameter of the pressurizing portion 12 is smaller than that of the injection portion 11, so as to facilitate pressurization.

[0040] Combination Figure 1 As shown, the hot runner inlet cylinder 2 has a material injection hole 13, and a middle connecting sleeve 14 is provided between the material delivery valve needle 6 and the hot runner inlet cylinder 2.

[0041] In this embodiment, the injection hole groove 13 facilitates the entry of molten material, and the middle connecting sleeve 14 plays a role of middle connection.

[0042] Combination Figure 1-4 As shown, the material delivery valve needle 6 is also provided with a sealing end 15 , and the sealing end 15 is snap-fitted with the injection portion 11 .

[0043] In this embodiment, the sealing end 15 is snap-fitted with the injection portion 11 to facilitate sealing of the connection between the two.

[0044] Combination Figure 1-3 As shown, a discharge channel 16 is formed between the feed valve needle 6 and the sealing inner sleeve 9 .

[0045] In this embodiment, the discharge channel 16 is used to assist in discharging the material.

[0046] The working principle of the utility model is:

[0047] During the injection molding process, the molten material is injected into the feed valve needle 6 through the hot runner inlet cylinder 2, and discharged through the discharge sleeve 5. The sealing inner sleeve 9 plays a sealing role. The bottom of the sealing inner sleeve 9 is conical and cooperates with the discharge sleeve 5. The feed valve needle 6 adopts a plurality of arc-shaped slots 7. During injection molding, on the one hand, the flow rate of the injection port is increased, and on the other hand, the material at the injection port is more uniform, avoiding the occurrence of material breakage, and improving the quality of the plastic parts.

[0048] Several arc-shaped slots 7 are distributed in a circular array along the center point of the delivery valve needle 6, and a multi-slot structure is adopted to further ensure uniform injection molding. The discharge end 8 cooperates with the discharge sleeve 5 to discharge the material.

[0049] The clamping protrusion 10 is convenient for clamping with the discharge sleeve 5, and the empty slot is convenient for disassembly and assembly.

[0050] The molten material first enters the injection part 11 and then enters the pressurizing part 12. The diameter of the pressurizing part 12 is smaller than that of the injection part 11, which is convenient for pressurization.

[0051] The injection hole 13 facilitates the entry of molten materials, and the middle connecting sleeve 14 plays the role of middle connection.

[0052] The sealing end 15 is engaged with the injection portion 11 to facilitate sealing of the connection between the two, and the discharge channel 16 is used to assist in discharge.

[0053] 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.

[0054] Although this article uses more terms such as valve needle sleeve body 1, hot runner inlet cylinder 2, multi-groove uniform injection feeding needle 3, seal 4, discharge sleeve head 5, feeding valve needle 6, arc groove 7, discharge end 8, sealing inner sleeve 9, clamping protrusion 10, injection part 11, booster part 12, injection hole groove 13, middle connecting sleeve 14, sealing end head 15, discharge channel 16, etc., it does not exclude the possibility of using other terms. The use of these terms is 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 high-speed PET preform mold hot runner valve needle slot uniform injection molding mechanism, comprising a valve needle sleeve body (1), characterized in that: A hot runner inlet cylinder (2) is provided above the valve needle sleeve body (1), and a multi-groove uniform injection molding feed needle portion (3) extending into the valve needle sleeve body (1) is provided at the bottom of the hot runner inlet cylinder (2), and a sealing member (4) is provided between the valve needle sleeve body (1) and the feed needle portion (3), and a discharge sleeve head (5) is provided at the bottom of the multi-groove uniform injection molding feed needle portion (3), and the discharge sleeve head (5) is snap-fitted with the valve needle sleeve body (1).

2. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 1, characterized in that: The multi-groove uniform injection molding material delivery needle part (3) comprises a material delivery valve needle (6) arranged at the bottom of the hot runner inlet cylinder (2), and the tail end of the material delivery valve needle (6) has a plurality of arc-shaped slots (7), and the arc-shaped slots (7) are arranged vertically.

3. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 2, characterized in that: The plurality of arc-shaped slots (7) are distributed in a ring array along the center point of the material delivery valve needle (6).

4. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 3, characterized in that: The bottom of the delivery valve needle (6) is provided with a discharge end (8), and the discharge end (8) passes through the discharge sleeve (5).

5. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 4, characterized in that: The sealing element (4) comprises a sealing inner sleeve (9) arranged between the valve needle sleeve body (1) and the feed needle part (3), and the bottom of the sealing inner sleeve (9) is conical.

6. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 5, characterized in that: The bottom side of the sealing inner sleeve (9) is provided with a plurality of clamping protrusions (10), and an empty groove is formed between two adjacent clamping protrusions (10).

7. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 6, characterized in that: The valve needle sleeve body (1) comprises an injection portion (11) and a pressurizing portion (12), and the diameter of the injection portion (11) is greater than the diameter of the pressurizing portion (12).

8. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 7, characterized in that: The hot runner inlet cylinder (2) has a material injection hole groove (13) in it, and a middle connecting sleeve (14) is provided between the material delivery valve needle (6) and the hot runner inlet cylinder (2).

9. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 8, characterized in that: The material delivery valve needle (6) is also provided with a sealing end head (15), and the sealing end head (15) is snap-fitted with the material injection portion (11).

10. The high-speed PET preform mold hot runner valve needle slotting uniform injection molding mechanism according to claim 9, characterized in that: A material discharge channel (16) is formed between the material delivery valve needle (6) and the sealing inner sleeve (9).

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