A fully cooled mold cavity

Abstract

The utility model provides a fully cooled mould cavity, the inside of mould cavity is equipped with mould cavity inner chamber and is used for cooling mould cavity inner chamber mould cavity cooling water channel, mould cavity cooling water channel first water gap, first outer layer water channel, inner layer water channel, second outer layer water channel and second water gap, inner layer water channel surrounds the outside of mould cavity inner chamber and is provided, and the first end and the second end of inner layer water channel extend to the first end surface and the second end surface of mould cavity respectively, cooling medium carries out cooling to mould cavity inner chamber through inner layer water channel, and the inside of inner layer water channel does not need to be equipped with multiple turns of fin, increases the area that cooling water channel covers mould cavity inner chamber, effectively improves the cooling effect and the uniformity of cooling of mould cavity, guarantees the forming quality of bottle blank, and simultaneously the first outer layer water channel and the second outer layer water channel are circumferentially connected in the two ends of inner layer water channel, can make the cooling medium that enters inner layer water channel cover inner layer water channel in the circumference, further guarantees the cooling effect and the uniformity of cooling of mould cavity.

Description

Technical Field

[0001] This utility model belongs to the field of mold cavity structure technology, specifically relating to a fully cooled mold cavity. Background Technology

[0002] In injection molding, the mold cavity is used to define at least part of the bottle body of the preform. To improve the cooling efficiency of the preform, a cooling structure is provided on the outer wall of the mold cavity. The cooling structure includes multiple annular ribs protruding from the outer wall of the mold cavity. The spacing of the multiple annular ribs forms cooling channels on the outer wall of the mold cavity. However, the existing mold cavity cooling structure has the following drawbacks:

[0003] Because the ribs occupy a large portion of the outer wall of the mold cavity, the area where the ribs are located is not covered by the cooling channels during the flow of the cooling medium. This results in a large area of ​​the molding surface not being adequately cooled, affecting the cooling effect and uniformity of the cooling medium on the mold cavity, and consequently impacting the molding quality of the preform. Utility Model Content

[0004] In order to overcome at least some of the shortcomings of the prior art, the present invention provides a fully cooled mold cavity.

[0005] The technical solution provided by this utility model is as follows:

[0006] A fully cooled mold cavity, wherein the interior of the mold cavity is provided with an inner cavity and a mold cavity cooling water channel for cooling the inner cavity, the mold cavity cooling water channel comprising:

[0007] An inner water channel is provided around the outer side of the inner cavity of the mold cavity, and the first end and the second end of the inner water channel extend toward the first end face and the second end face of the mold cavity, respectively.

[0008] The first sprue extends from the outer wall of the mold cavity into the interior of the mold cavity;

[0009] The first outer waterway includes a connected diversion area and a guiding area, the guiding area surrounding and communicating with the outside of the first end of the inner waterway, and the diversion area extending from the extended end of the first water outlet toward the guiding area.

[0010] The second outer waterway surrounds and connects to the outside of the second end of the inner waterway;

[0011] The second sprue extends from the outer wall of the mold cavity or the second end face into the interior of the mold cavity and communicates with the outside of the second outer water channel.

[0012] As a further technical solution of this utility model, the first end of the inner water channel is close to or extends to the first end face of the mold cavity, and the second end of the inner water channel is close to or extends to the second end face of the mold cavity.

[0013] As a further technical solution of this utility model, a turbulence column is provided in the inner waterway.

[0014] As a further technical solution of this utility model, the turbulence column extends radially inclined or parallel, and is distributed in several rings along the axial direction, with adjacent rings of the turbulence column being staggered in the circumferential direction.

[0015] As a further technical solution of this utility model, the mold cavity cooling water channel also includes multiple first transition water channels and multiple second transition water channels;

[0016] Multiple first transition channels are distributed sequentially along the outer circumferential direction of the first end of the inner channel, and the multiple first transition channels respectively connect the guiding area and the first end of the inner channel;

[0017] Multiple second transition channels are distributed sequentially along the outer circumferential direction of the second end of the inner channel, and the multiple second transition channels respectively connect the second outer channel and the second end of the inner channel.

[0018] As a further technical solution of this utility model, a plurality of first transition channels are provided inside the mold cavity and / or on the first end face, and a plurality of second transition channels are provided inside the mold cavity and / or on the second end face.

[0019] As a further technical solution of this utility model, the multiple first transition channels and the multiple second transition channels extend radially and are distributed at equal angles along the circumference.

[0020] As a further technical solution of this utility model, the diversion area is in the shape of a hollow oblique cylinder, and the curvature of the diversion area gradually increases along the circumference from the extension end of the first water outlet to the flow guiding area.

[0021] As a further technical solution of this utility model, the flow guiding area is located inside the mold cavity or on the first end face, and the second outer water channel is located inside the mold cavity or on the second end face.

[0022] As a further technical solution of this utility model, there are two second water inlets, which are distributed 180° apart in the circumferential direction.

[0023] The beneficial effects of this utility model are: the cooling medium cools the inner cavity of the mold cavity through the inner water channel, and there is no need to set multiple rings of ribs inside the inner water channel, which increases the area covered by the cooling water channel in the inner cavity of the mold cavity, effectively improving the cooling effect and cooling uniformity of the mold cavity, and ensuring the molding quality of the preform; at the same time, the first outer water channel and the second outer water channel are circumferentially connected at both ends of the inner water channel, which enables the cooling medium entering the inner water channel to cover the inner water channel in the circumferential direction, further ensuring the cooling effect and cooling uniformity of the mold cavity. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the internal structure of the mold cavity in this embodiment;

[0025] Figure 2 This is a schematic diagram of the mold cavity cooling structure in this embodiment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] like Figure 1 and Figure 2As shown, this embodiment discloses a sufficiently cooled mold cavity. The mold cavity has an inner cavity 8 and mold cavity cooling channels for cooling the inner cavity 8. The mold cavity cooling channels include a first gate 1, a first outer channel 2, an inner channel 4, a second outer channel 6, and a second gate 7. The inner channel 4 is arranged around the outside of the inner cavity 8 to cool the inner cavity 8. The first end and the second end of the inner channel 4 extend toward the first end face and the second end face of the mold cavity, respectively. The first gate 1 extends from the outer wall of the mold cavity into the interior of the mold cavity. The first outer channel 2 includes a connected diversion region 21 and a guiding region 22. The guiding region 22 surrounds and connects to the outside of the first end of the inner channel 4, and the diversion region 21 extends from the extended end of the first gate 1 toward the guiding region 22. The second outer channel 6 surrounds and connects to the outside of the second end of the inner channel 4. The second gate 7 extends from the outer wall or the second end face of the mold cavity into the interior of the mold cavity and connects to the outside of the second outer channel 6. Preferably, the mold cavity is manufactured using 3D printing technology. The cooling medium cools the inner cavity 8 of the mold cavity through the inner water channel 4. The inner water channel 4 does not require ribs, which increases the area covered by the cooling water channel in the inner cavity 8, effectively improving the cooling effect and uniformity of the mold cavity and ensuring the molding quality of the preform. At the same time, the first outer water channel 2 and the second outer water channel 6 are circumferentially connected to the first and second ends of the inner water channel 4, respectively, which allows the cooling medium entering the inner water channel 4 to cover the inner water channel 4 circumferentially, further ensuring the cooling effect and uniformity of the mold cavity.

[0030] As a further embodiment, the first end of the inner water channel 4 is close to or extends to the first end face of the mold cavity, and the second end of the inner water channel 4 is close to or extends to the second end face of the mold cavity.

[0031] As a further implementation, the inner water channel 4 is provided with turbulence columns 9 to agitate the water flow, maintaining a high turbulent state and thus a high convective heat transfer coefficient, ensuring rapid and uniform cooling. The turbulence columns 9 extend radially inclined or parallel, and their cross-section can be circular, teardrop-shaped, or polygonal. The number and density of the turbulence columns 9 in the inner water channel 4 can be adjusted as needed. The turbulence columns 9 in the inner water channel 4 serve the following functions:

[0032] 1. During the flow of the cooling medium in the inner water channel 4, laminar flow is easily formed. The low-speed layer close to the wall of the inner water channel 4 will hinder heat transfer. The turbulence column 9 creates turbulence to destroy the low-speed layer of laminar flow, so that the cooling medium can have more contact with the wall. At the same time, the turbulence increases the degree of hot and cold mixing of the cooling medium and accelerates the transfer of heat from the high-temperature wall to the cooling medium, thereby improving the heat exchange efficiency.

[0033] 2. The turbulence column 9 itself is a raised structure, which can increase the surface area of ​​the inner wall of the inner water channel 4, provide more heat dissipation contact points, and indirectly improve the heat dissipation capacity of the inner water channel 4.

[0034] 3. The turbulence column 9 can agitate the cooling medium, reduce local hot spots, and avoid uneven temperature distribution caused by stagnant cooling medium.

[0035] Preferably, the turbulence columns 9 in the inner water channel 4 are distributed in several rings along the axial direction, and the turbulence columns 9 of adjacent rings are staggered in the circumferential direction, so that the cooling medium maintains a high turbulence state when flowing in the inner water channel 4.

[0036] In a further embodiment, the mold cavity cooling channel also includes multiple first transition channels 3 and multiple second transition channels 5. The multiple first transition channels 3 are sequentially distributed along the outer circumferential direction of the first end of the inner channel 4, and the multiple first transition channels 3 respectively connect the guide region 22 and the first end of the inner channel 4; the multiple second transition channels 5 are sequentially distributed along the outer circumferential direction of the second end of the inner channel 4, and the multiple second transition channels 5 respectively connect the second outer channel 6 and the second end of the inner channel 4. The multiple first transition channels 3 are located inside the mold cavity and / or on the first end face, and the multiple second transition channels 5 are located inside the mold cavity and / or on the second end face. Both the multiple first transition channels 3 and the multiple second transition channels 5 extend radially and are distributed at equal angles along the circumferential direction.

[0037] The flow pattern of the cooling medium within the cooling channels of the mold cavity can be one of the following two:

[0038] The water flows in from the first water inlet 1 and flows out from the second water inlet 7; at this time, the first water inlet 1 serves as the water inlet.

[0039] It flows in from the second water outlet 7 and flows out from the first water outlet 1; at this time, the first water outlet 1 serves as the outlet.

[0040] When the first gate 1 is used as an inlet, the diversion area 21 serves to divert the cooling medium; when the first gate 1 is used as an outlet, the diversion area 21 serves to converge the cooling medium. Preferably, the diversion area 21 has a hollow, obliquely truncated cylindrical structure. From the extended end of the first gate 1 to the guide area 22, the curvature of the diversion area 21 gradually increases along the circumference, thereby better realizing the function of diversion or convergence. When the cooling medium flows into the inner water channel 4 through the first transition water channel 3, the cooling medium can flow into the inner water channel 4 evenly in the circumferential direction, so that the inner water channel 4 is fully covered; when the cooling medium of the inner water channel 4 flows out through the first transition water channel 3, the cooling medium can flow out evenly in the circumferential direction from the first end of the inner water channel 4, making the mold cavity cooler more uniformly.

[0041] As a further embodiment, the flow guiding area 22 is located inside the mold cavity or on the first end face, and the second outer water channel 6 is located inside the mold cavity or on the second end face.

[0042] As a further embodiment, two second gates 7 are provided, and the two second gates 7 are distributed 180° apart in the circumferential direction to adapt to the cooling structure of different mold cavity bottoms and improve the adaptability of the mold cavity.

[0043] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A fully cooled mold cavity, characterized in that: The mold cavity has an inner cavity and a mold cavity cooling channel for cooling the inner cavity. The mold cavity cooling channel includes: An inner water channel is provided around the outer side of the inner cavity of the mold cavity, and the first end and the second end of the inner water channel extend toward the first end face and the second end face of the mold cavity, respectively. The first sprue extends from the outer wall of the mold cavity into the interior of the mold cavity; The first outer waterway includes a connected diversion area and a guiding area, the guiding area surrounding and communicating with the outside of the first end of the inner waterway, and the diversion area extending from the extended end of the first water outlet toward the guiding area. The second outer waterway surrounds and connects to the outside of the second end of the inner waterway; The second sprue extends from the outer wall of the mold cavity or the second end face into the interior of the mold cavity and communicates with the outside of the second outer water channel.

2. The fully cooled mold cavity according to claim 1, characterized in that: The first end of the inner water channel is close to or extends to the first end face of the mold cavity, and the second end of the inner water channel is close to or extends to the second end face of the mold cavity.

3. The fully cooled mold cavity according to claim 1, characterized in that: The inner waterway is equipped with turbulence-disrupting columns.

4. The fully cooled mold cavity according to claim 3, characterized in that: The turbulence-disrupting columns extend radially at an angle or parallel to the axis and are distributed in several concentric rings, with adjacent concentric rings of turbulence-disrupting columns staggered in the circumferential direction.

5. A fully cooled mold cavity according to claim 1, characterized in that: The mold cavity cooling water channel also includes: Multiple first transition channels are distributed sequentially along the outer circumferential direction of the first end of the inner channel, respectively connecting the guiding area and the first end of the inner channel; Multiple second transition channels are distributed sequentially along the outer circumferential direction of the second end of the inner channel, respectively connecting the second outer channel and the second end of the inner channel.

6. A fully cooled mold cavity according to claim 5, characterized in that: Multiple first transition channels are provided inside the mold cavity and / or on the first end face, and multiple second transition channels are provided inside the mold cavity and / or on the second end face.

7. A fully cooled mold cavity according to claim 5, characterized in that: Multiple first transition channels and multiple second transition channels extend radially and are distributed at equal angles along the circumference.

8. A fully cooled mold cavity according to claim 1, characterized in that: The diversion area is shaped like a hollow oblique cylinder, and the curvature of the diversion area gradually increases along the circumference from the extension end of the first water inlet to the diversion area.

9. A fully cooled mold cavity according to claim 1, characterized in that: The flow guiding area is located inside the mold cavity or on the first end face, and the second outer water channel is located inside the mold cavity or on the second end face.

10. A fully cooled mold cavity according to claim 1, characterized in that: There are two second water inlets, which are distributed 180° apart circumferentially.

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