Hot tip type hot runner system of injection mold for high-permeability plastic daily necessities

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a hot tip type hot runner system of a high-transmittance plastic injection mold for daily necessities. The plastic product forming die comprises a plastic product forming lower die and a plastic product forming upper die. In the injection molding process, the two forming convex parts and the two forming concave parts are attached to form two complete cavities, molten materials are injected into the hot tip type flow channel connecting structure through the injection molding piece, pressurized injection molding is conducted through the hot tip type flow channel connecting structure, then the molten materials are synchronously conveyed into the two cavities through the cross-shaped flow dividing piece, and therefore injection molding is conducted on the molten materials through the cross-shaped flow dividing piece. Two plastic parts can be formed through injection molding at a time, a pressurizing mode is adopted, it is ensured that a cavity can be fully filled with molten materials during injection molding, bubbles in the plastic parts are reduced, the overall quality of the plastic parts is improved, mold opening is conducted after injection molding is completed, and the two formed plastic parts are synchronously ejected and demolded along the side portions and the end portions of the plastic parts through the multi-directional synchronous ejection assembly; and the demolding area is large, and the situation that the plastic part topples over or gets stuck is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a hot tip type hot runner system for an injection mold of high-transparency plastic daily necessities. Background Art

[0002] Due to its transparent characteristics, the contents inside can be clearly seen when containing items during use for high-transparency plastic daily necessities, which is very suitable for storage and is widely loved by consumers. High-transparency plastic daily necessities are mass-produced using injection molds. In the injection process of existing high-transparency plastic daily necessities molds, in order to improve efficiency, a one-to-many form is generally adopted. However, in the injection process of the one-to-many structure, the travel of the molten material will become longer, and it is easy to have an insufficient filling situation when injecting into multiple cavities, resulting in air bubbles in the plastic part and affecting the overall quality of the plastic part. Therefore, there is an urgent need to design a hot tip type hot runner system for an injection mold of high-transparency plastic daily necessities that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses an in-mold labeling injection mold for plastic daily necessities [Application No.: 202322801850.9], which includes an injection mold lower mold for plastic daily necessities and an injection mold upper mold for plastic daily necessities. An injection part is provided above the injection mold upper mold for plastic daily necessities. A mold closing inner-embedded protrusion is provided on the injection mold lower mold for plastic daily necessities. A side inner-labeling ear forming component and a deep cavity recess are provided inside the mold closing inner-embedded protrusion. A deep cavity protrusion is provided on the injection mold upper mold for plastic daily necessities. The positions of the deep cavity recess and the deep cavity protrusion correspond to each other and the shapes are matched. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hot tip type hot runner system for an injection mold of high-transparency plastic daily necessities in view of the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hot tip type hot runner system for an injection mold of high-transparency plastic daily necessities includes a plastic product forming lower mold and a plastic product forming upper mold. An injection part is provided above the plastic product forming upper mold. A hot tip type runner connection structure connected to the injection part is provided inside the plastic product forming upper mold. A cross-shaped shunt part is provided inside the plastic product forming lower mold. The cross-shaped shunt part is disposed opposite to the hot tip type runner connection structure. Two forming protrusions symmetrically arranged along the center line of the plastic product forming lower mold are provided inside the plastic product forming lower mold. Two forming recesses symmetrically arranged along the center line of the plastic product forming upper mold are provided inside the plastic product forming upper mold. The positions of the forming protrusions and the forming recesses correspond to each other and the shapes are matched. A multi-directional synchronous ejection component is provided inside the plastic product forming lower mold. The multi-directional synchronous ejection component corresponds to the position of the forming protrusion.

[0007] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the hot tip type runner connection structure includes a conical pressurized channel arranged in the upper mold for plastic product molding, and the diameter of the conical pressurized channel gradually decreases from top to bottom.

[0008] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the injection part includes an injection main board arranged above the upper mold for plastic product molding, and an injection main hole is arranged in the injection main board.

[0009] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the diameter of the injection main hole is the same as the diameter of the top of the conical pressurized channel.

[0010] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the cross-shaped shunt part includes a cross-shaped shunt channel arranged in the lower mold for plastic product molding, and the cross-shaped shunt channel is directly below the conical pressurized channel.

[0011] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, a transverse feeding groove is arranged between the cross-shaped shunt channel and the molding convex part, and the width of the transverse feeding groove gradually increases from the side close to the molding convex part to the side far from the molding convex part.

[0012] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the multi-directional synchronous ejection assembly includes a plastic part side ejector block and a plastic part end side ejector plate arranged in the lower mold for plastic product molding, and the plastic part side ejector block and the plastic part end side ejector plate are arranged alternately.

[0013] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, the plastic part side ejector block corresponds to the side part of the molding convex part, the plastic part end side ejector plate corresponds to the end part of the molding convex part, and the cross-sectional area of the plastic part end side ejector plate is larger than the cross-sectional area of the plastic part side ejector block.

[0014] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, an ejection fixing plate is arranged below the lower mold for plastic product molding, and a plurality of first ejector rods and second ejector rods are arranged on the ejection fixing plate. The first ejector rod is connected to the plastic part side ejector block, and the second ejector rod is connected to the plastic part end side ejector plate.

[0015] In the above-mentioned hot tip type hot runner system for injection molds of high-transparency plastic daily necessities, a center ejector rod connected to the ejection fixing plate is arranged below the cross-shaped shunt channel.

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

[0017] 1. During the injection molding process of the present utility model, the lower mold for plastic product molding and the upper mold for plastic product molding are moved closer to each other, so that the two forming convex parts are fitted with the forming concave parts to form two complete cavities. The molten material is injected into the hot tip type runner connection structure through the injection part, and pressure injection is carried out through the hot tip type runner connection structure. Then, the molten material is synchronously sent to the two cavities through the cross-shaped flow dividing part. Two plastic parts can be injection molded at one time, and in a pressurized manner, it is ensured that the molten material can fully fill the cavity during injection molding, reducing the air bubbles in the plastic part and improving the overall quality of the plastic part. After injection molding, the mold is opened, and the two molded plastic parts are synchronously ejected and demolded along the side and end of the plastic part through the multi-directional synchronous ejection assembly. The demolding area is large, avoiding the situation of the plastic part tipping over or jamming.

[0018] 2. The plastic part end side top plate in the present utility model can eject the ends of the two plastic parts at the same time, and is centrally arranged, reducing the floor area and space, and realizing the function of one ejecting two.

[0019] Other advantages, objectives and features of the present utility model will be partly reflected by the following description, and partly will be understood by those skilled in the art through the research and practice of the present utility model. Brief Description of the Drawings

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

[0021] Figure 2 is the structural schematic diagram of the upper mold for plastic product molding.

[0022] Figure 3 is the structural schematic diagram of the upper mold for plastic product molding in another direction.

[0023] Figure 4 is the partial structural schematic diagram of the present utility model.

[0024] Figure 5 is the partial structural schematic diagram of the present utility model in another direction.

[0025] In the figure: lower mold 1 for plastic product molding, upper mold 2 for plastic product molding, injection part 3, hot tip type runner connection structure 4, cross-shaped flow dividing part 5, forming convex part 6, forming concave part 7, multi-directional synchronous ejection assembly 8, conical pressurized channel 9, injection main board 10, injection main hole 11, cross-shaped flow dividing channel 12, transverse feeding groove 13, plastic part side top block 14, plastic part end side top plate 15, ejection fixing plate 16, first ejector rod 17, second ejector rod 18, center ejector rod 19. Detailed Embodiment

[0026] The present utility model will be further described below with reference to the accompanying drawings.

[0027] AsFigures 1-5 As shown in the figure, a hot tip type hot runner system for an injection mold of a high-transparency plastic daily necessities includes a lower mold 1 for forming plastic products and an upper mold 2 for forming plastic products. An injection part 3 is arranged above the upper mold 2 for forming plastic products. A hot tip type runner connection structure 4 connected to the injection part 3 is arranged in the upper mold 2 for forming plastic products. A cross-shaped shunt part 5 is arranged in the lower mold 1 for forming plastic products. The cross-shaped shunt part 5 is arranged opposite to the hot tip type runner connection structure 4. Two forming convex parts 6 symmetrically arranged along the center line of the lower mold 1 for forming plastic products are arranged in the lower mold 1 for forming plastic products. Two forming concave parts 7 symmetrically arranged along the center line of the upper mold 2 for forming plastic products are arranged in the upper mold 2 for forming plastic products. The positions of the forming convex parts 6 and the forming concave parts 7 correspond to each other and their shapes are matched. A multi-directional synchronous ejection assembly 8 is arranged in the lower mold 1 for forming plastic products. The multi-directional synchronous ejection assembly 8 corresponds to the position of the forming convex part 6.

[0028] In this embodiment, during the injection molding process, the lower mold 1 for forming plastic products and the upper mold 2 for forming plastic products are moved closer to each other, so that the two forming convex parts 6 and the forming concave parts 7 are fitted together to form two complete cavities. The molten material is injected into the hot tip type runner connection structure 4 through the injection part 3. Pressure injection is carried out through the hot tip type runner connection structure 4. Then, the molten material is synchronously sent to the two cavities through the cross-shaped shunt part 5. Two plastic parts can be injection molded at one time. And by using the pressurized method, it is ensured that the molten material can fully fill the cavity during injection molding, reducing the bubbles in the plastic parts and improving the overall quality of the plastic parts. After the injection molding is completed, the mold is opened, and the two formed plastic parts are synchronously ejected and demolded along the side and end of the plastic parts through the multi-directional synchronous ejection assembly 8. The ejection area is large, avoiding the situation of the plastic parts toppling or jamming.

[0029] Combined with Figures 1-5 As shown in the figure, the hot tip type runner connection structure 4 includes a tapered pressurized channel 9 arranged in the upper mold 2 for forming plastic products. The diameter of the tapered pressurized channel 9 gradually decreases from top to bottom. The injection part 3 includes an injection main board 10 arranged above the upper mold 2 for forming plastic products. An injection main hole 11 is arranged in the injection main board 10. The cross-shaped shunt part 5 includes a cross-shaped shunt channel 12 arranged in the lower mold 1 for forming plastic products. The cross-shaped shunt channel 12 is located directly below the tapered pressurized channel 9. A transverse feeding groove 13 is arranged between the cross-shaped shunt channel 12 and the forming convex part 6. The width of the transverse feeding groove 13 gradually increases from the side close to the forming convex part 6 to the side far from the forming convex part 6.

[0030] Specifically, during the injection molding process, the molten material is injected into the conical pressurized channel 9 through the main injection hole 11 in the main injection molding board 10. The diameter of the conical pressurized channel 9 gradually decreases from top to bottom. By using the pressurization method, it is ensured that the molten material can fully fill the cavity during injection molding, reducing the air bubbles in the plastic part and improving the overall quality of the plastic part. Then, the molten material is synchronously sent to the two cavities through the cross-shaped runner 12 and the transverse feeding groove 13, and two plastic parts can be injection molded at one time.

[0031] Combined with Figure 1 、 Figure 2 As shown, the diameter of the main injection hole 11 is the same as the diameter of the top of the conical pressurized channel 9.

[0032] In this embodiment, the diameter of the main injection hole 11 is the same as the diameter of the top of the conical pressurized channel 9, and the structure is compact and reasonable.

[0033] The multi-directional synchronous ejection assembly 8 includes a plastic part side ejector block 14 and a plastic part end side ejector plate 15 arranged in the lower mold 1 for plastic product molding. The plastic part side ejector block 14 and the plastic part end side ejector plate 15 are arranged alternately.

[0034] In this embodiment, after the injection molding is completed and the mold is opened, the two molded plastic parts are synchronously ejected and demolded along the side and end of the plastic part through the plastic part side ejector block 14 and the plastic part end side ejector plate 15. The demolding area is large, avoiding the situation of the plastic part tipping over or getting stuck.

[0035] Combined with Figures 1-5 As shown, the plastic part side ejector block 14 corresponds to the side of the molding convex part 6, the plastic part end side ejector plate 15 corresponds to the end of the molding convex part 6, and the cross-sectional area of the plastic part end side ejector plate 15 is larger than the cross-sectional area of the plastic part side ejector block 14.

[0036] In this embodiment, the plastic part end side ejector plate 15 can simultaneously eject the ends of the two plastic parts, and is arranged in the middle to achieve the function of ejecting two with one.

[0037] Combined with Figures 1-5 As shown, a top-out fixing plate 16 is provided below the lower mold 1 for plastic product molding. A number of first ejector rods 17 and second ejector rods 18 are provided on the top-out fixing plate 16. The first ejector rod 17 is connected to the plastic part side ejector block 14, and the second ejector rod 18 is connected to the plastic part end side ejector plate 15.

[0038] In this embodiment, the top-out fixing plate 16 is used to fix the first ejector rod 17 and the second ejector rod 18, and the first ejector rod 17 and the second ejector rod 18 are used to connect the plastic part side ejector block 14 and the plastic part end side ejector plate 15.

[0039] Combined with Figures 1-5 As shown, a center ejector rod 19 connected to the top-out fixing plate 16 is provided below the cross-shaped runner 12.

[0040] In this embodiment, the central ejector rod 19 can eject the cooled material at the cross-shaped runner 12 to avoid affecting the next injection molding.

[0041] The working principle of the present utility model is as follows:

[0042] During the injection molding process, the plastic product forming lower mold 1 and the plastic product forming upper mold 2 are moved closer to each other, so that the two forming convex parts 6 are fitted with the forming concave parts 7 to form two complete cavities. The molten material is injected into the conical pressurizing channel 9 through the injection main hole 11 in the injection main board 10. The diameter of the conical pressurizing channel 9 gradually decreases from top to bottom. By using the pressurizing method, it is ensured that the molten material can fully fill the cavity during injection molding, reducing the air bubbles in the plastic part and improving the overall quality of the plastic part. Then, the molten material is synchronously sent to the two cavities through the cross-shaped runner 12 and the transverse feeding groove 13. Two plastic parts can be injection molded at one time. After the injection molding is completed, the mold is opened, and the two formed plastic parts are synchronously ejected and demolded along the side and end of the plastic part by the plastic part side ejector block 14 and the plastic part end side ejector plate 15. The demolding area is large, avoiding the situation of the plastic part toppling or jamming.

[0043] The plastic part end side ejector plate 15 can simultaneously eject the ends of the two plastic parts, and is centrally arranged to achieve the function of ejecting two parts with one ejector. The ejector fixing plate 16 is used to fix the first ejector rod 17 and the second ejector rod 18. The first ejector rod 17 and the second ejector rod 18 are used to connect the plastic part side ejector block 14 and the plastic part end side ejector plate 15. The central ejector rod 19 can eject the cooled material at the cross-shaped runner 12 to avoid affecting the next injection molding.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model.

[0045] Although terms such as the plastic product forming lower mold 1, the plastic product forming upper mold 2, the injection molded part 3, the hot tip runner connection structure 4, the cross-shaped flow dividing part 5, the forming convex part 6, the forming concave part 7, the multi-directional synchronous ejection assembly 8, the conical pressurizing channel 9, the injection main board 10, the injection main hole 11, the cross-shaped runner 12, the transverse feeding groove 13, the plastic part side ejector block 14, the plastic part end side ejector plate 15, the ejector fixing plate 16, the first ejector rod 17, the second ejector rod 18, and the central ejector rod 19 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present utility model, and interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A hot tip type hot runner system for an injection mold of a high-transparency plastic daily necessities, comprising a lower mold (1) for forming plastic products and an upper mold (2) for forming plastic products, characterized in that, Above the upper mold (2) for plastic product molding, there is an injection molded part (3). Inside the upper mold (2) for plastic product molding, there is a hot tip type runner connection structure (4) connected to the injection molded part (3). Inside the lower mold (1) for plastic product molding, there is a cross-shaped flow divider (5). The cross-shaped flow divider (5) is arranged opposite to the hot tip type runner connection structure (4). Inside the lower mold (1) for plastic product molding, there are two molding convex parts (6) symmetrically arranged along the center line of the lower mold (1) for plastic product molding. Inside the upper mold (2) for plastic product molding, there are two molding concave parts (7) symmetrically arranged along the center line of the upper mold (2) for plastic product molding. The positions of the molding convex parts (6) and the molding concave parts (7) correspond to each other and their shapes are matched. Inside the lower mold (1) for plastic product molding, there is a multi-directional synchronous ejection assembly (8). The multi-directional synchronous ejection assembly (8) corresponds to the position of the molding convex parts (6).

2. The hot tip type hot runner system for injection molding of high-transparency plastic daily necessities according to claim 1, characterized in that, The hot tip type runner connection structure (4) includes a conical pressurization channel (9) arranged inside the upper mold (2) for plastic product molding. The diameter of the conical pressurization channel (9) gradually decreases from top to bottom.

3. The hot tip type hot runner system for the injection mold of high-transparency plastic daily necessities according to claim 2, characterized in that, The injection molded part (3) includes an injection main board (10) arranged above the upper mold (2) for plastic product molding. Inside the injection main board (10), there is an injection main hole (11).

4. The hot tip type hot runner system for injection molding of high-transparency plastic daily necessities according to claim 3, characterized in that, The diameter of the injection main hole (11) is the same as the top diameter of the conical pressurization channel (9).

5. The hot tip type hot runner system for injection molding of high transparency plastic daily necessities according to claim 4, characterized in that, The cross-shaped flow divider (5) includes a cross-shaped flow channel (12) arranged inside the lower mold (1) for plastic product molding. The cross-shaped flow channel (12) is located directly below the conical pressurization channel (9).

6. The hot tip type hot runner system of the injection mold for high-transparency plastic daily necessities according to claim 5, characterized in that, Between the cross-shaped flow channel (12) and the molding convex parts (6), there is a lateral feeding groove (13). The width of the lateral feeding groove (13) gradually increases from the side close to the molding convex parts (6) to the side far from the molding convex parts (6).

7. The hot tip type hot runner system for injection molding of high transparency plastic daily necessities according to claim 6, characterized in that, The multi-directional synchronous ejection assembly (8) includes a plastic part side ejector block (14) and a plastic part end side ejector plate (15) arranged inside the lower mold (1) for plastic product molding. The plastic part side ejector block (14) and the plastic part end side ejector plate (15) are arranged alternately.

8. The hot tip type hot runner system for injection molding of high-transparency plastic daily necessities according to claim 7, characterized in that The plastic part side ejector block (14) corresponds to the side part of the molding convex parts (6). The plastic part end side ejector plate (15) corresponds to the end part of the molding convex parts (6). The cross-sectional area of the plastic part end side ejector plate (15) is larger than the cross-sectional area of the plastic part side ejector block (14).

9. The hot tip type hot runner system for injection molding of high-transparency plastic daily necessities according to claim 8, characterized in that, Below the lower mold (1) for plastic product molding, there is an ejection fixing plate (16). On the ejection fixing plate (16), there are several first ejector rods (17) and second ejector rods (18). The first ejector rods (17) are connected to the plastic part side ejector blocks (14). The second ejector rods (18) are connected to the plastic part end side ejector plates (15).

10. The hot tip type hot runner system for injection molding of high-transparency plastic daily necessities according to claim 9, characterized in that, Below the cross-shaped flow channel (12), there is a center ejector rod (19) connected to the ejection fixing plate (16).

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