Nozzle core and nozzle cap assembling structure

Abstract

The invention discloses a nozzle core and nozzle cap assembling structure which comprises a nozzle core and a nozzle cap, the nozzle cap is coaxially assembled on the nozzle core, a nozzle is formed in the top end of the nozzle core, a plurality of obliquely-distributed first through holes are formed in the arc face, close to the nozzle core, of the lower portion of an inner cavity, and the first through holes are low in the outer portion and high in the inner portion. A plurality of second through holes are formed in the cylindrical surface below the nozzle core, the nozzle core and the nozzle cap are assembled to form a plastic steering cavity, and the plastic steering cavity is communicated with the first through holes and the second through holes respectively. The nozzle core and the nozzle cap which are coaxially assembled are adopted, the plastic steering cavity is formed between the nozzle core and the nozzle cap, and plastic enters from the nozzle core, then enters the plastic steering cavity formed between the nozzle cap and the outer wall of the nozzle core from the first through hole and finally enters the nozzle core from the second through hole in the nozzle core, so that the plastic is mixed in the transverse direction; and finally, the pressure of the plastic is consistent, the problems of pressure difference and speed difference of the plastic are solved, and the problem of fusion lines in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of mechanical components technology, specifically to a nozzle core and nozzle cap assembly structure. Background Technology

[0002] Traditional hot runner systems for bi-color headlight lenses typically use a needle valve hot runner system. Due to inconsistent internal pressure of the plastic around the valve needle, the plastic flows at different speeds on one side, resulting in a fusion line phenomenon in the application of bi-color headlight lenses with hot runners. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a nozzle core and nozzle cap assembly structure, including a nozzle core and a nozzle cap, wherein the nozzle cap is coaxially assembled on the nozzle core, a nozzle is provided at the top of the nozzle core, and a plurality of inclined first through holes are provided on the arc surface below the internal cavity of the nozzle core, the first through holes being lower on the outside and higher on the inside, and a plurality of second through holes are provided on the cylindrical surface below them. The nozzle core and nozzle cap are assembled to form a plastic steering cavity, and the plastic steering cavity is connected to the first through holes and the second through holes respectively.

[0004] Furthermore, the second through holes are distributed in a circumferential array structure below the nozzle core, with the outer side higher than the inner side.

[0005] Furthermore, the first through holes are distributed in a circumferential array structure on the nozzle core.

[0006] The advantages of the invention compared to existing technologies are:

[0007] This invention employs a coaxially assembled nozzle core and nozzle cap, forming a plastic steering cavity between them. After entering from the nozzle core, the plastic enters the plastic steering cavity formed between the nozzle cap and the outer wall of the nozzle core through the first through hole, and finally enters the nozzle core through the second through hole, allowing the plastic to mix laterally and ultimately ensuring consistent plastic pressure. This solves the problems of pressure difference and speed difference in plastics, and resolves the fusion line problem in the prior art. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the assembly structure of the nozzle core and nozzle cap according to the present invention;

[0009] Figure 2 This is a schematic diagram of the nozzle core structure;

[0010] Figure 3 This is a cross-sectional schematic diagram of the nozzle core;

[0011] Figure 4 This is a schematic diagram of the mouthpiece structure;

[0012] Figure 5 This is a cross-sectional view of the mouthpiece;

[0013] Figure 6 This is a reference diagram showing the usage state of the present invention.

[0014] Among them, 1. Nozzle core, 2. Nozzle cap, 3. Nozzle, 4. First through hole, 5. Second through hole, 6. Assembly surface one, 7. Assembly surface two, 8. Mating surface one, 9. Mating surface two, 10. Plastic steering cavity. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] The present invention will be described in detail with reference to the accompanying drawings.

[0017] In a specific implementation, the present invention provides a nozzle core and nozzle cap assembly structure, including a nozzle core 1 and a nozzle cap 2. The nozzle cap 2 is coaxially assembled on the nozzle core 1. A nozzle 3 is provided at the top of the nozzle core 1. A plurality of inclined first through holes 4 are provided on the lower arc surface of the inner cavity near the nozzle core 1. The first through holes 4 are lower on the outside and higher on the inside. A plurality of second through holes 5 are provided on the cylindrical surface below them. The nozzle core 1 and nozzle cap 2 are assembled to form a plastic steering cavity 10. The plastic steering cavity 10 is connected to the first through holes 4 and the second through holes 5 respectively.

[0018] Example:

[0019] like Figure 1 As shown, the present invention coaxially assembles the nozzle core 1 and the nozzle cap 2 to form a nozzle structure, as follows. Figure 6 As shown, the above nozzle structure is connected to a hot runner plastic pipe A in the prior art. The end of the hot runner plastic pipe A is a mold gate, through which plastic is injected into the plastic product B. Both the hot runner plastic pipe A and the plastic product B are prior art. By controlling the valve needle on the plastic pipe in the prior art, after the valve needle is opened, the plastic passes through the middle hole of the nozzle core 1. When the plastic flows to the first through hole 4 on the nozzle core 1, it flows out of the nozzle core 1 through the first through hole 4 and enters the plastic turning cavity 10 formed after the nozzle core 1 and the nozzle cap 2 are assembled. Then the plastic flows back into the nozzle core 1 through the second through hole 5 on the nozzle core 1. At this time, since the second through hole 5 is distributed in a circumferential array structure below the nozzle core 1, the plastic flowing out of the second through hole 5 is mixed in the lateral direction, and the pressure can be made consistent, which solves the problem of pressure difference and speed difference of plastic in the prior art, thereby solving the problem of fusion line. The uniformly mixed plastic is injected into the corresponding mold from the nozzle 3 at the top of the nozzle core 1, ensuring that no fusion line appears during the injection process and improving the injection effect.

[0020] like Figure 1 As shown, the second through hole 5 is distributed in a circumferential array structure below the nozzle core 1, with the outer part higher than the inner part.

[0021] like Figure 3 As shown, the first through hole 4 is distributed in a circumferential array structure on the nozzle core 1.

[0022] As a further explanation of the present invention, the nozzle core 1 is provided with a first mounting surface 6 and a second mounting surface 7, and the nozzle cap 2 is provided with a first mating surface 8 and a second mating surface 9. The nozzle core 1 is connected to the nozzle cap 2 via the second mounting surface 7 and the second mating surface 9 through an interference fit. The nozzle core 1 is fitted and limited by the first mounting surface 6 and the first mating surface 8. The second mating surface 9 is a protrusion formed by extending inward from the inner wall of the bottom of the nozzle cap 2.

[0023] As a further explanation of the present invention, the nozzle core 1 is hollow inside, and the hollow portion is wider at the top and narrower at the bottom. Its central hole is used for the inflow of plastic.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A nozzle core and nozzle cap assembly structure, comprising a nozzle core (1) and a nozzle cap (2), wherein the nozzle cap (2) is coaxially assembled on the nozzle core (1), and a nozzle (3) is provided at the top of the nozzle core (1), characterized in that: Multiple inclined first through holes (4) are provided on the lower arc surface of the inner cavity near the nozzle core (1). The first through holes (4) are lower on the outside and higher on the inside. Multiple second through holes (5) are provided on the cylindrical surface below them. The nozzle core (1) and the nozzle cap (2) are assembled to form a plastic steering cavity (10). The plastic steering cavity (10) is connected to the first through holes (4) and the second through holes (5).

2. The nozzle core and nozzle cap assembly structure according to claim 1, characterized in that: The second through hole (5) is distributed in a circular array structure below the nozzle core (1), with the outer part higher than the inner part.

3. The nozzle core and nozzle cap assembly structure according to claim 2, characterized in that: The first through hole (4) is distributed in a circular array structure on the nozzle core (1).

4. The nozzle core and nozzle cap assembly structure according to claim 1, characterized in that: The nozzle core (1) is provided with a first mounting surface (6) and a second mounting surface (7), and the nozzle cap (2) is provided with a first mating surface (8) and a second mating surface (9). The nozzle core (1) is connected to the nozzle cap (2) by an interference fit through the second mounting surface (7) and the second mating surface (9). The nozzle core (1) achieves a fit limitation through the first mounting surface (6) and the first mating surface (8).

5. The nozzle core and nozzle cap assembly structure according to claim 4, characterized in that: The nozzle core (1) is hollow inside, and the hollow part is wider at the top and narrower at the bottom.

6. The nozzle core and nozzle cap assembly structure according to claim 4, characterized in that: The mating surface 2 (9) is a protrusion formed by extending inward from the inner wall of the bottom of the cap (2).

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