Needle valve type hot runner structure of deep-cavity thick-wall child bathtub mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a needle valve type hot runner structure of a deep-cavity thick-wall child bathtub mold. The utility model comprises a child bathtub forming lower die and a child bathtub forming upper die. In the injection molding process, the child bathtub forming lower mold and the child bathtub forming upper mold are close to each other, so that the bathtub forming convex part and the bathtub forming concave part are butted and matched to form a complete cavity, and a molten material is injected into the injection molding splitter plate through the injection molding main pipe of the injection molding main plate and is split through the injection molding splitter plate; the combined type center pouring piece sends a molten material to the center position of a plastic piece, the rubber coating type enclosing needle valve hot runner assembly sends the molten material to the two sides of the plastic piece, synchronous multi-directional rubber coating injection molding is achieved, it is ensured that the molten material can be rapidly injected into a cavity in a large area, and forming of the plastic piece is completed; the influence on the internal and surface quality of a plastic part due to advanced condensation of materials caused by too low injection molding speed is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a needle valve type hot runner structure of a deep cavity and thick wall children's bathtub mold. Background Art

[0002] Children's bathtubs are household appliances used for bathing children. To save costs, most children's bathtubs are made of plastic and require injection molding. Existing children's bathtub molds typically use injection pipes and manifolds for injection diversion during the molding process. Due to the basin-shaped bathtub, the molten material on both sides needs to flow within the mold cavity for a long time before reaching the corresponding position. As a result, the material is prone to premature coagulation, which affects the internal and surface quality of the molded part. Therefore, it is urgent to design a deep-cavity, thick-walled children's bathtub mold with a needle valve hot runner structure that can overcome the above defects.

[0003] In order to overcome the shortcomings of the existing technology, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a folding bathtub injection mold [application number: 202320423220.X], which includes a bathtub molding lower mold and a bathtub molding upper mold. An injection molded part is provided above the bathtub molding upper mold, and a detachable auxiliary molding protrusion component is provided in the bathtub molding lower mold. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a needle valve hot runner structure for a deep cavity and thick wall children's bathtub mold.

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

[0006] A deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure includes a children's bathtub molding lower mold and a children's bathtub molding upper mold. The children's bathtub molding lower mold is provided with a bathtub molding convex portion, and the children's bathtub molding upper mold is provided with a bathtub molding concave portion. The bathtub molding convex portion corresponds to the position of the bathtub molding concave and the shape is matched. An injection molding main board is provided above the children's bathtub molding upper mold, and an injection molding main pipe is provided between the injection molding main board and the children's bathtub molding upper mold. The bottom of the injection molding main pipe is connected to an injection molding diverter plate, and the bottom of the injection molding diverter plate is provided with a combined center feed part. Glue-coated enclosed needle valve hot runner assemblies are provided on both sides of the injection molding diverter plate. The combined center feed part and the glue-coated enclosed needle valve hot runner assembly respectively correspond to the position of the bathtub molding convex portion.

[0007] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, the rubber-enclosed needle valve hot runner assembly includes side oblique diverter plates arranged on both sides of the injection diverter plate, and a side needle valve injection tube is provided at the bottom of the side oblique diverter plate, and a heating part is provided inside the side oblique diverter plate.

[0008] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, the heating part includes an electric heating pipeline arranged in the side oblique diverter plate, and the electric heating pipeline is staggered with the side needle valve injection pipe.

[0009] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, the combined central pouring part includes a main pouring pipe and several auxiliary pouring pipes arranged at the bottom of the injection molding manifold, and the main pouring pipe and several auxiliary pouring pipes are staggered.

[0010] In the above-mentioned needle valve hot runner structure of the deep cavity thick wall children's bathtub mold, the injection molding main pipe component includes an injection molding main pipe arranged between the injection molding main board and the children's bathtub molding upper mold, and the injection molding main pipe is connected to the injection molding diverter plate.

[0011] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, a supporting fixture is provided between the children's bathtub molding upper mold and the injection molding main board, one end of the supporting fixture is against the children's bathtub molding upper mold, and the other end is against the injection molding main board.

[0012] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, the supporting fixing member includes three supporting plates arranged between the children's bathtub molding upper mold and the injection molding main board, and the supporting plates are staggered with the injection molding diverter plates.

[0013] In the above-mentioned needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold, the bathtub molding protrusion includes a bathtub body molding protrusion provided in the children's bathtub molding lower mold.

[0014] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, the bathtub molding recess includes a bathtub body molding recess provided in the children's bathtub molding upper mold, and the bathtub body molding recess corresponds to the position of the bathtub body molding protrusion and has a matching shape.

[0015] In the above-mentioned deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure, a bathtub edge forming cavity is also provided in the children's bathtub forming lower mold, and a bathtub edge forming protrusion is also provided in the children's bathtub forming upper mold. The bathtub edge forming cavity is arranged opposite to the bathtub edge forming protrusion.

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

[0017] 1. During the injection molding process, the utility model brings the lower mold and the upper mold of the children's bathtub molding close to each other, so that the bathtub molding convex part and the bathtub molding concave part are abutted and matched to form a complete cavity. The molten material is injected into the injection molding diverter plate through the injection molding main pipe of the injection molding main board, and is diverted by the injection molding diverter plate. The molten material is fed into the center position of the plastic part by the combined center feeding part, and the molten material is fed to the positions on both sides of the plastic part by the rubber-coated enclosed needle valve hot runner assembly, realizing synchronous multi-directional rubber-coated injection molding, ensuring that the molten material can be quickly and widely injected into the cavity to complete the molding of the plastic part, and avoiding premature coagulation of the material due to too slow an injection molding rate, which affects the internal and surface quality of the plastic part.

[0018] 2. The electric heating pipeline in the present invention is connected to an external circuit. The electric heating pipeline can heat the molten material located at the side oblique diverter plate to prevent the molten material from condensing due to a long flow time, thereby ensuring the injection temperature.

[0019] Other advantages, objectives and features of the present invention will be reflected 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 diagram of the present utility model.

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

[0022] Figure 3 It is a structural diagram of a combined center-injection part and a rubber-coated enclosed needle valve hot runner assembly.

[0023] Figure 4 It is a structural diagram of the upper mold for forming a children's bathtub.

[0024] In the figure: children's bathtub molding lower mold 1, children's bathtub molding upper mold 2, bathtub molding convex part 3, bathtub molding concave part 4, injection molding main board 5, injection molding main pipe part 6, injection molding diverter plate 7, combined center inlet casting part 8, rubber-coated enclosed needle valve hot runner assembly 9, side oblique diverter plate 10, side needle valve injection molding pipe 11, heating part 12, electric heating pipeline 13, main inlet pouring pipe 14, auxiliary inlet pouring pipe 15, injection molding main pipe 16, support fixing part 17, support plate body 18, bathtub main body molding protrusion 19, bathtub main body molding cavity 20, bathtub basin edge molding cavity 21, bathtub basin edge molding protrusion 22. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, a deep-cavity, thick-walled children's bathtub mold needle valve hot runner structure includes a children's bathtub molding lower mold 1 and a children's bathtub molding upper mold 2. The children's bathtub molding lower mold 1 is provided with a bathtub molding convex portion 3, and the children's bathtub molding upper mold 2 is provided with a bathtub molding concave portion 4. The bathtub molding convex portion 3 corresponds to the position of the bathtub molding concave portion 4 and the shape is matched. An injection molding main board 5 is provided above the children's bathtub molding upper mold 2, and an injection molding main pipe 6 is provided between the injection molding main board 5 and the children's bathtub molding upper mold 2. The bottom of the injection molding main pipe 6 is connected to an injection molding diverter plate 7, and the bottom of the injection molding diverter plate 7 is provided with a combined center feed part 8. Glue-coated enclosed needle valve hot runner assemblies 9 are provided on both sides of the injection molding diverter plate 7. The combined center feed part 8 and the glue-coated enclosed needle valve hot runner assembly 9 respectively correspond to the position of the bathtub molding convex portion 3.

[0027] In this embodiment, during the injection molding process, the children's bathtub molding lower mold 1 and the children's bathtub molding upper mold 2 are brought close to each other, so that the bathtub molding convex part 3 and the bathtub molding concave part 4 are abutted and matched to form a complete cavity, and the molten material is injected into the injection molding diverter plate 7 through the injection molding main pipe part 6 of the injection molding main board 5, and is diverted by the injection molding diverter plate 7. The molten material is fed into the center position of the plastic part by the combined center inlet part 8, and the molten material is fed to the positions on both sides of the plastic part by the rubber-coated enclosed needle valve hot runner assembly 9, realizing synchronous multi-directional rubber-coated injection molding, ensuring that the molten material can be quickly and widely injected into the cavity to complete the molding of the plastic part, and avoiding premature coagulation of the material due to too slow an injection molding rate, affecting the internal and surface quality of the plastic part.

[0028] Combine Figure 1-4 As shown, the rubber-coated enclosed needle valve hot runner assembly 9 includes side oblique diverter plates 10 arranged on both sides of the injection diverter plate 7, a side needle valve injection tube 11 is provided at the bottom of the side oblique diverter plate 10, and a heating part 12 is provided inside the side oblique diverter plate 10.

[0029] Specifically, during the injection molding process, the molten material is injected into the injection molding diverter plate 7 through the injection molding main pipe 6 of the injection molding main board 5, and is diverted by the injection molding diverter plate 7. The molten material is fed into the center position of the plastic part by the combined center inlet 8, and the molten material is fed to the positions on both sides of the plastic part by the side oblique diverter plate 10 and the side needle valve injection molding pipe 11, realizing synchronous multi-directional rubber-coated injection molding, ensuring that the molten material can be quickly and widely injected into the mold cavity to complete the molding of the plastic part, avoiding premature coagulation of the material due to too slow an injection rate, affecting the internal and surface quality of the plastic part, and the heating part 12 can heat the molten material located at the side oblique diverter plate 10 to avoid coagulation of the molten material due to too long a flow time, thereby ensuring the injection molding temperature.

[0030] The heating portion 12 includes an electric heating pipeline 13 disposed in the side oblique diverter plate 10 , and the electric heating pipeline 13 and the side needle valve injection pipe 11 are staggered.

[0031] In this embodiment, the electric heating pipeline 13 is connected to the external circuit. The electric heating pipeline 13 can heat the molten material located at the side oblique diverter plate 10 to prevent the molten material from coagulating due to excessive flow time, thereby ensuring the injection molding temperature.

[0032] Combine Figure 2 、 Figure 3 As shown, the combined central pouring part 8 includes a main pouring pipe 14 and a plurality of auxiliary pouring pipes 15 arranged at the bottom of the injection manifold 7, and the main pouring pipe 14 and the plurality of auxiliary pouring pipes 15 are staggered.

[0033] In this embodiment, during injection molding, the molten material is fed into the center of the plastic part through the main inlet pipe 14 and the plurality of auxiliary inlet pipes 15 .

[0034] The injection molding main pipe component 6 includes an injection molding main pipe 16 disposed between the injection molding main board 5 and the children's bathtub forming upper mold 2 , and the injection molding main pipe 16 is connected to the injection molding diverter plate 7 .

[0035] In this embodiment, during injection molding, the molten material is injected into the injection molding diverter plate 7 through the injection molding main pipe 16 for diversion.

[0036] Combine Figure 1 As shown, a supporting fixture 17 is provided between the upper mold 2 for forming the children's bathtub and the injection molding main board 5 . One end of the supporting fixture 17 abuts against the upper mold 2 for forming the children's bathtub, and the other end abuts against the injection molding main board 5 .

[0037] In this embodiment, the supporting fixture 17 supports the upper mold 2 for forming the children's bathtub and the injection molding main plate 5 , ensuring that there is corresponding space for the injection molding diverter plate 7 .

[0038] The supporting fixture 17 includes three supporting plates 18 disposed between the upper mold 2 for forming the children's bathtub and the injection molding main plate 5 . The supporting plates 18 and the injection molding diverter plates 7 are arranged in an alternating manner.

[0039] In this embodiment, three support plates 18 support the upper mold 2 and the injection molding main plate 5 for molding the children's bathtub, ensuring that there is corresponding space for the injection molding diverter plate 7 .

[0040] Combine Figure 1-4 As shown, the bathtub forming protrusion 3 includes a bathtub body forming protrusion 19 arranged in the children's bathtub forming lower mold 1, and the bathtub forming recess 4 includes a bathtub body forming cavity 20 arranged in the children's bathtub forming upper mold 2, and the bathtub body forming cavity 20 corresponds to the position of the bathtub body forming protrusion 19 and is matched in shape.

[0041] In this embodiment, during injection molding, the bathtub body molding cavity 20 fits with the bathtub body molding protrusion 19 to form the main body of the bathtub plastic part.

[0042] Combine Figure 1-4 As shown, a bathtub edge forming cavity 21 is further provided in the lower mold 1 for forming the children's bathtub, and a bathtub edge forming protrusion 22 is further provided in the upper mold 2 for forming the children's bathtub. The bathtub edge forming cavity 21 and the bathtub edge forming protrusion 22 are arranged opposite to each other.

[0043] In this embodiment, during injection molding, the bathtub rim forming cavity 21 and the bathtub rim forming protrusion 22 fit together to form the rim structure of the bathtub plastic part without the need for secondary deformation processing.

[0044] The working principle of this utility model is:

[0045] During the injection molding process, the children's bathtub molding lower mold 1 and the children's bathtub molding upper mold 2 are brought close to each other, the bathtub main body molding cavity 20 is fitted with the bathtub main body molding protrusion 19 to form the main body of the bathtub plastic part, and the bathtub basin edge molding cavity 21 is fitted with the bathtub basin edge molding protrusion 22 to form the basin edge structure of the bathtub plastic part. No secondary deformation treatment is required. The molten material is injected into the injection molding diverter plate 7 through the injection molding main pipe 16 of the injection molding main board 5, and is diverted by the injection molding diverter plate 7. The molten material is fed into the plastic part by the combined center inlet 8. At the center position, the molten material is fed to the positions on both sides of the plastic part by the side oblique diverter plate 10 and the side needle valve injection tube 11 to realize synchronous multi-directional overmolding injection, ensuring that the molten material can be quickly and widely injected into the cavity to complete the molding of the plastic part, avoiding premature coagulation of the material due to too slow an injection rate, affecting the internal and surface quality of the plastic part, the electric heating pipeline 13 is connected to the external circuit, and the electric heating pipeline 13 can heat the molten material at the side oblique diverter plate 10 to avoid coagulation of the molten material due to too long a flow time, thereby ensuring the injection temperature.

[0046] During injection molding, the molten material is fed into the center of the plastic part through the main inlet pipe 14 and several auxiliary inlet pipes 15. The molten material is injected into the injection manifold 7 through the injection main pipe 16 for diversion.

[0047] The three support plates 18 support the upper mold 2 and the injection molding main plate 5 of the children's bathtub, ensuring that there is corresponding space for the injection molding diverter plate 7.

[0048] 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 with similar methods, without departing from the spirit of the present invention.

[0049] Although this article frequently uses the terms such as children's bathtub molding lower mold 1, children's bathtub molding upper mold 2, bathtub molding protrusion 3, bathtub molding concave part 4, injection molding main board 5, injection molding main pipe 6, injection molding manifold 7, combined center pouring part 8, rubber-coated enclosed needle valve hot runner assembly 9, side oblique manifold 10, side needle valve injection molding pipe 11, heating part 12, electric heating pipeline 13, main pouring pipe 14, auxiliary pouring pipe 15, injection molding main pipe 16, supporting fixture 17, support plate 18, bathtub main body molding protrusion 19, bathtub main body molding cavity 20, bathtub basin edge molding cavity 21, bathtub basin edge molding protrusion 22, etc., it does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model. Interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A deep cavity thick wall children's bathtub mold needle valve hot runner structure, comprising a children's bathtub molding lower mold (1) and a children's bathtub molding upper mold (2), characterized in that: A bathtub forming protrusion (3) is provided in the lower mold (1) for forming the children's bathtub, and a bathtub forming recess (4) is provided in the upper mold (2) for forming the children's bathtub. The positions of the bathtub forming protrusion (3) and the bathtub forming recess (4) correspond and the shapes of the bathtub forming protrusion (3) and the bathtub forming recess (4) are matched. An injection molding main board (5) is provided above the upper mold (2) for forming the children's bathtub, and an injection molding main pipe (6) is provided between the injection molding main board (5) and the upper mold (2) for forming the children's bathtub. The bottom of the injection molding main pipe (6) is connected to an injection molding diverter plate (7), and the bottom of the injection molding diverter plate (7) is provided with a combined center feed casting (8). Both sides of the injection molding diverter plate (7) are provided with rubber-coated enclosed needle valve hot runner assemblies (9). The combined center feed casting (8) and the rubber-coated enclosed needle valve hot runner assembly (9) respectively correspond to the positions of the bathtub forming protrusion (3).

2. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 1 is characterized in that: The rubber-coated enclosed needle valve hot runner assembly (9) comprises side oblique diverter plates (10) arranged on both sides of the injection molding diverter plate (7), a side needle valve injection molding tube (11) is provided at the bottom of the side oblique diverter plate (10), and a heating portion (12) is provided inside the side oblique diverter plate (10).

3. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 2 is characterized in that: The heating portion (12) includes an electric heating pipeline (13) arranged in the side oblique diverter plate (10), and the electric heating pipeline (13) and the side needle valve injection tube (11) are arranged in an alternating manner.

4. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 3 is characterized in that: The combined central pouring part (8) comprises a main pouring pipe (14) and a plurality of auxiliary pouring pipes (15) arranged at the bottom of the injection molding manifold (7), wherein the main pouring pipe (14) and the plurality of auxiliary pouring pipes (15) are arranged in a staggered manner.

5. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 4 is characterized in that: The injection molding main pipe component (6) comprises an injection molding main pipe (16) arranged between the injection molding main board (5) and the children's bathtub forming upper mold (2), and the injection molding main pipe (16) is connected to the injection molding diverter plate (7).

6. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 5 is characterized in that: A supporting fixture (17) is provided between the upper mold (2) for forming the children's bathtub and the injection molding main plate (5); one end of the supporting fixture (17) abuts against the upper mold (2) for forming the children's bathtub, and the other end abuts against the injection molding main plate (5).

7. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 6 is characterized in that: The supporting fixing member (17) comprises three supporting plates (18) arranged between the upper mold (2) for forming the children's bathtub and the injection molding main plate (5), and the supporting plates (18) and the injection molding diverter plates (7) are arranged in an interlaced manner.

8. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 7 is characterized in that: The bathtub forming protrusion (3) comprises a bathtub body forming protrusion (19) arranged in a children's bathtub forming lower mold (1).

9. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 8, characterized in that: The bathtub forming recess (4) comprises a bathtub main body forming cavity (20) arranged in the children's bathtub forming upper die (2); the bathtub main body forming cavity (20) corresponds to the position of the bathtub main body forming protrusion (19) and has a matching shape.

10. The needle valve hot runner structure of the deep cavity and thick wall children's bathtub mold according to claim 9, characterized in that: A bathtub rim forming cavity (21) is further provided in the children's bathtub forming lower die (1), and a bathtub rim forming protrusion (22) is further provided in the children's bathtub forming upper die (2), wherein the bathtub rim forming cavity (21) and the bathtub rim forming protrusion (22) are arranged opposite to each other.

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