Plastic water cup injection mold

Abstract

The utility model belongs to the technical field of molds, and relates to an injection mold for a plastic water cup. The plastic water cup forming die comprises a plastic water cup forming lower die and a plastic water cup forming upper die. In the injection molding process, the plastic water cup molding lower mold and the plastic water cup molding upper mold are close to each other, so that the lower molding cavity part and the upper molding cavity part are attached and communicated to form a complete cavity, and the water cup molding center insert is moved upwards to be inserted into the cavity formed by the lower molding cavity part and the upper molding cavity part; the water cup molding center insert and the plastic water cup molding center insert are matched to form a complete cavity, a molten material is injected into the cavity through the injection molding part to complete injection molding, the mold is opened after injection molding is completed, the water cup molding center insert and the water cup molding center insert can be automatically demolded only by moving the water cup molding center insert downwards, and the cup opening wall of the water cup molding part abuts against the plastic water cup molding lower mold. And an additional ejection demolding structure is not needed, so that the structure of the mold is greatly simplified, the production cost is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for a plastic water cup. Background Art

[0002] Plastic water cups are commonly used drinking utensils in people's daily lives, with low cost and suitable for various scenarios. Currently, plastic water cups are integrally injection-molded through injection molds. In the injection process of existing plastic water cup molds, after injection, the molded plastic parts need to be ejected and demolded by cooperating with an ejection mechanism. The structure of the mold is relatively complex, resulting in high production costs and low work efficiency. Therefore, there is an urgent need to design an injection mold for plastic water cups 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 a plastic water cup mold [Application No.: 201810846328.3], which includes a body. The body includes a moving mold and a fixed mold. A fixed rod is provided on the moving mold, and a fixed groove is correspondingly provided on the fixed mold. The moving mold includes a base, an upper mold body, a middle mold body, and a lower mold body. The lower mold body is provided on the base, the lower mold body is sleeved outside the middle mold body, the upper mold body is provided on the middle mold body, heat dissipation parts are provided on the left and right inner walls of the fixed mold, and cooling fans are provided on both sides of the heat dissipation parts. When the fixed mold and the moving mold are clamped, a cooling water pipe is provided on the inner wall of the fixed mold where the lower mold body is located, a water inlet is provided on one side of the fixed mold, and a water outlet is provided on the other side of the fixed mold. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold for a plastic water cup in view of the above problems.

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

[0006] An injection mold for a plastic water cup includes a lower mold for forming a plastic water cup and an upper mold for forming a plastic water cup. A lower forming cavity part is provided inside the lower mold for forming a plastic water cup, and an upper forming cavity part is provided inside the upper mold for forming a plastic water cup. A water cup forming center insert that extends downward once and penetrates into the lower forming cavity part and the upper forming cavity part is provided below the lower mold for forming a plastic water cup. The lower forming cavity part and the upper forming cavity part respectively match the shape of the water cup forming center insert. An injection part is provided above the upper mold for forming a plastic water cup.

[0007] In the above injection mold for a plastic water cup, the water cup forming center insert includes a water cup forming center socket provided below the lower mold for forming a plastic water cup, and the top of the water cup forming center socket is arc-shaped.

[0008] In the above-mentioned plastic water cup injection mold, the cross-sectional area of the center socket for forming the water cup gradually increases from top to bottom.

[0009] In the above-mentioned plastic water cup injection mold, a fixed base plate is provided below the lower mold for forming the plastic water cup, and the center socket for forming the water cup is clamped and matched with the fixed base plate through a connecting member.

[0010] In the above-mentioned plastic water cup injection mold, the connecting member includes a fixed socket provided on the center socket for forming the water cup, an embedding groove is provided in the fixed base plate, and the fixed socket is clamped and matched with the embedding groove.

[0011] In the above-mentioned plastic water cup injection mold, the cross-sectional area of the fixed socket is larger than that of the center socket for forming the water cup.

[0012] In the above-mentioned plastic water cup injection mold, a mold closing cavity groove is provided in the lower mold for forming the plastic water cup, a mold closing protrusion is provided in the upper mold for forming the plastic water cup, and the mold closing cavity groove and the mold closing protrusion are arranged opposite to each other.

[0013] In the above-mentioned plastic water cup injection mold, the lower forming cavity part is communicated with the mold closing cavity groove, and the upper forming cavity part penetrates through the mold closing protrusion.

[0014] In the above-mentioned plastic water cup injection mold, the injection molded part includes an injection molding top plate provided above the upper mold for forming the plastic water cup, and an injection hole is provided in the injection molding top plate.

[0015] In the above-mentioned plastic water cup injection mold, an injection molding positioning plate is provided between the injection molding top plate and the upper mold for forming the plastic water cup, and the injection molding top plate is clamped and matched with the injection molding positioning plate.

[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 forming the plastic water cup and the upper mold for forming the plastic water cup are moved closer to each other, so that the lower forming cavity part and the upper forming cavity part are fitted and communicated to form a complete chamber. The center plug for forming the water cup is moved upward and inserted into the chamber formed by the lower forming cavity part and the upper forming cavity part to cooperate to form a complete mold cavity. The molten material is injected into the mold cavity through the injection molded part to complete the injection molding. After the injection molding is completed, the mold is opened. Only by moving the center plug for forming the water cup downward can the plastic part be automatically demolded from the center plug for forming the water cup. The cup mouth wall of the water cup plastic part abuts against the lower mold for forming the plastic water cup, and there is no need to additionally provide an ejection demolding structure, which greatly simplifies the structure of the mold, reduces the production cost, and improves the working efficiency.

[0018] 2. The cross-sectional area of the fixed socket in the present utility model is larger than that of the central socket for forming the water cup. During injection molding, the molten material will not leak from the bottom, and the sealing performance is good.

[0019] Other advantages, objectives, and features of the present utility model will be partially reflected by the following description and partially 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 a schematic structural view of the present utility model.

[0021] Figure 2 is an exploded view of the present utility model.

[0022] Figure 3 is a partial exploded view of the present utility model.

[0023] Figure 4 is a schematic structural view of the lower mold for forming a plastic water cup.

[0024] Figure 5 is a schematic structural view of the upper mold for forming a plastic water cup.

[0025] In the figure: the lower mold 1 for forming a plastic water cup, the upper mold 2 for forming a plastic water cup, the lower forming cavity part 3, the upper forming cavity part 4, the central insert 5 for forming the water cup, the injection molded part 6, the central socket 7 for forming the water cup, the fixed substrate 8, the connecting part 9, the fixed socket 10, the groove 11, the mold clamping cavity groove 12, the mold clamping protrusion 13, the injection molding top plate 14, the injection hole 15, and the injection molding positioning plate 16. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0027] As Figures 1-5 shown, a plastic water cup injection mold includes a lower mold 1 for forming a plastic water cup and an upper mold 2 for forming a plastic water cup. A lower forming cavity part 3 is provided inside the lower mold 1 for forming a plastic water cup, an upper forming cavity part 4 is provided inside the upper mold 2 for forming a plastic water cup. A central insert 5 for forming the water cup that extends downward once and penetrates into the lower forming cavity part 3 and the upper forming cavity part 4 is provided below the lower mold 1 for forming a plastic water cup. The lower forming cavity part 3 and the upper forming cavity part 4 respectively match the shape of the central insert 5 for forming the water cup. An injection molded part 6 is provided above the upper mold 2 for forming a plastic water cup.

[0028] In this embodiment, during the injection molding process, the lower plastic water cup molding die 1 and the upper plastic water cup molding die 2 are moved closer to each other, so that the lower molding cavity part 3 and the upper molding cavity part 4 are fitted and communicated to form a complete chamber. The water cup molding center insert 5 is moved upward and inserted into the chamber formed by the lower molding cavity part 3 and the upper molding cavity part 4 to cooperate to form a complete mold cavity. The molten material is injected into the mold cavity through the injection part 6 to complete the injection molding. After the injection molding is completed, the mold is opened. Just by moving the water cup molding center insert 5 downward, the plastic part can be automatically demolded from the water cup molding center insert 5. The cup mouth wall of the water cup plastic part abuts against the lower plastic water cup molding die 1, and there is no need to additionally set up an ejection demolding structure, which greatly simplifies the structure of the mold, reduces the production cost, and improves the work efficiency.

[0029] Combined with Figures 1-5 As shown, the water cup molding center insert 5 includes a water cup molding center socket 7 arranged below the lower plastic water cup molding die 1. The top of the water cup molding center socket 7 is arc-shaped, and the cross-sectional area of the water cup molding center socket 7 gradually increases from top to bottom.

[0030] Specifically, during injection molding, the water cup molding center socket 7 is moved upward and inserted into the chamber formed by the lower molding cavity part 3 and the upper molding cavity part 4 to cooperate to form a complete mold cavity. The molten material is injected into the mold cavity through the injection part 6 to complete the injection molding. After the injection molding is completed, the mold is opened. Just by moving the water cup molding center socket 7 downward, the plastic part can be automatically demolded from the water cup molding center socket 7. The cup mouth wall of the water cup plastic part abuts against the lower plastic water cup molding die 1, and there is no need to additionally set up an ejection demolding structure, which greatly simplifies the structure of the mold, reduces the production cost, and improves the work efficiency. The cross-sectional area of the water cup molding center socket 7 gradually increases from top to bottom, adopting a quasi-inverted cone structure, which is convenient for direct core pulling demolding.

[0031] Combined with Figure 2 、 Figure 3 As shown, a fixed base plate 8 is arranged below the lower plastic water cup molding die 1. The water cup molding center socket 7 and the fixed base plate 8 are snap-fitted through a connecting part 9.

[0032] In this embodiment, the fixed base plate 8 fixes the water cup molding center socket 7 through the connecting part 9.

[0033] The connecting part 9 includes a fixed socket 10 arranged on the water cup molding center socket 7. An embedding groove 11 is arranged in the fixed base plate 8. The fixed socket 10 and the embedding groove 11 are snap-fitted.

[0034] In this embodiment, the water cup molding center socket 7 is fixed on the fixed base plate 8 through the snap-fitting between the fixed socket 10 and the embedding groove 11, and the water cup molding center socket 7 is driven to move synchronously by moving the fixed base plate 8.

[0035] Combined Figure 3 As shown, the cross-sectional area of the fixed socket 10 is larger than that of the water cup forming center socket 7.

[0036] In this embodiment, the cross-sectional area of the fixed socket 10 is larger than that of the water cup forming center socket 7. During injection molding, the molten material will not leak from the bottom, and the sealing performance is good.

[0037] A mold clamping cavity groove 12 is provided in the lower mold 1 for plastic water cup forming, and a mold clamping protrusion 13 is provided in the upper mold 2 for plastic water cup forming. The mold clamping cavity groove 12 and the mold clamping protrusion 13 are arranged opposite to each other. The lower forming cavity part 3 is communicated with the mold clamping cavity groove 12, and the upper forming cavity part 4 passes through the mold clamping protrusion 13.

[0038] In this embodiment, during mold clamping, the mold clamping cavity groove 12 and the mold clamping protrusion 13 are fitted together, and the mold clamping accuracy is relatively high.

[0039] Combined Figures 1-2 As shown, the injection molded part 6 includes an injection molding top plate 14 arranged above the upper mold 2 for plastic water cup forming, and an injection molding hole 15 is provided in the injection molding top plate 14.

[0040] In this embodiment, during injection molding, the molten material is injected into the mold cavity through the injection molding hole 15 in the injection molding top plate 14.

[0041] Combined Figures 1-2 As shown, an injection molding positioning plate 16 is provided between the injection molding top plate 14 and the upper mold 2 for plastic water cup forming, and the injection molding top plate 14 and the injection molding positioning plate 16 are engaged and matched.

[0042] In this embodiment, the injection molding positioning plate 16 is used to position the injection molding top plate 14 to prevent the injection molding top plate 14 from shaking during injection molding, and the stability is relatively strong.

[0043] The working principle of the present utility model is:

[0044] During the injection molding process, the lower mold 1 for plastic water cup molding and the upper mold 2 for plastic water cup molding are brought closer to each other, so that the lower molding cavity part 3 and the upper molding cavity part 4 are fitted and communicated to form a complete chamber. The center socket 7 for water cup molding is moved upward and inserted into the chamber formed by the lower molding cavity part 3 and the upper molding cavity part 4 to cooperate to form a complete mold cavity. The molten material is injected into the mold cavity through the injection hole 15 in the injection top plate 14. After the injection molding is completed, the mold is opened. Just by moving the center socket 7 for water cup molding downward, the plastic part can be automatically demolded from the center socket 7 for water cup molding. The cup mouth wall of the water cup plastic part abuts against the lower mold 1 for plastic water cup molding, eliminating the need for an additional ejection demolding structure, greatly simplifying the mold structure, reducing production costs, and improving work efficiency. The cross-sectional area of the center socket 7 for water cup molding gradually increases from top to bottom, adopting a quasi-inverted cone structure, which is convenient for direct core pulling demolding.

[0045] The center socket 7 for water cup molding is fixed on the fixed substrate 8 through the snap-fit between the fixed socket 10 and the slot 11. By moving the fixed substrate 8, the center socket 7 for water cup molding is driven to move synchronously.

[0046] The cross-sectional area of the fixed socket 10 is larger than that of the center socket 7 for water cup molding. During injection molding, the molten material will not leak from the bottom, and the sealing performance is good.

[0047] During mold closing, the mold closing cavity groove 12 and the mold closing protrusion 13 are fitted, and the mold closing accuracy is relatively high.

[0048] The injection molding positioning plate 16 is used to position the injection top plate 14 to prevent the injection top plate 14 from shaking during injection molding, and the stability is relatively strong.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention 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 invention.

[0050] Although terms such as the lower mold 1 for plastic water cup molding, the upper mold 2 for plastic water cup molding, the lower molding cavity part 3, the upper molding cavity part 4, the center insert 5 for water cup molding, the injection molded part 6, the center socket 7 for water cup molding, the fixed substrate 8, the connecting part 9, the fixed socket 10, the slot 11, the mold closing cavity groove 12, the mold closing protrusion 13, the injection top plate 14, the injection hole 15, and the injection molding positioning plate 16 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 invention, and interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An injection mold for a plastic water cup, comprising a lower mold (1) for forming the plastic water cup and an upper mold (2) for forming the plastic water cup, characterized in that, The lower die (1) for forming a plastic water cup is provided with a lower forming cavity part (3) therein, the upper die (2) for forming a plastic water cup is provided with an upper forming cavity part (4) therein, a water cup forming center insert (5) which extends once into the lower forming cavity part (3) and the upper forming cavity part (4) is arranged below the lower die (1) for forming a plastic water cup, the lower forming cavity part (3) and the upper forming cavity part (4) respectively match the shape of the water cup forming center insert (5), and an injection molding part (6) is arranged above the upper die (2) for forming a plastic water cup.

2. The plastic water cup injection mold according to claim 1, characterized in that, The water cup forming center insert (5) includes a water cup forming center socket (7) arranged below the lower die (1) for forming a plastic water cup, and the top of the water cup forming center socket (7) is arc-shaped.

3. The plastic water cup injection mold according to claim 2, characterized in that, The cross-sectional area of the water cup forming center socket (7) gradually becomes larger from top to bottom.

4. The plastic water cup injection mold according to claim 3, characterized in that, A fixed substrate (8) is arranged below the lower die (1) for forming a plastic water cup, and the water cup forming center socket (7) and the fixed substrate (8) are in snap-fit connection through a connecting part (9).

5. The plastic water cup injection mold according to claim 4, characterized in that, The connecting part (9) includes a fixed socket (10) arranged on the water cup forming center socket (7), an embedding groove (11) is arranged in the fixed substrate (8), and the fixed socket (10) and the embedding groove (11) are in snap-fit connection.

6. The plastic water cup injection mold according to claim 5, characterized in that, The cross-sectional area of the fixed socket (10) is larger than the cross-sectional area of the water cup forming center socket (7).

7. The plastic water cup injection mold according to claim 6, wherein, A die closing cavity groove (12) is arranged in the lower die (1) for forming a plastic water cup, a die closing protrusion (13) is arranged in the upper die (2) for forming a plastic water cup, and the die closing cavity groove (12) and the die closing protrusion (13) are arranged opposite to each other.

8. The plastic water cup injection mold according to claim 7, characterized in that, The lower forming cavity part (3) is communicated with the die closing cavity groove (12), and the upper forming cavity part (4) penetrates through the die closing protrusion (13).

9. The plastic water cup injection mold according to claim 8, characterized in that, The injection molding part (6) includes an injection molding top plate (14) arranged above the upper die (2) for forming a plastic water cup, and an injection molding hole (15) is arranged in the injection molding top plate (14).

10. The plastic water cup injection mold according to claim 9, characterized in that, An injection molding positioning plate (16) is arranged between the injection molding top plate (14) and the upper die (2) for forming a plastic water cup, and the injection molding top plate (14) and the injection molding positioning plate (16) are in snap-fit connection.

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