Novel injection mold hot nozzle cooling device

Abstract

The utility model discloses a novel injection mold hot nozzle cooling device which comprises a cooling jacket and an injection mold, the cooling jacket comprises a cooling jacket main body, the outer side wall of the cooling jacket main body is convexly provided with a guide convex strip, and the bottom wall of the cooling jacket main body extends to form a discharging section; the bottom wall of the cooling jacket main body is positioned between the outer side wall of the cooling jacket main body and the outer side wall of the discharging section; the cooling sleeve is provided with an upper sealing ring and a lower sealing ring, and the lower sealing ring is arranged on the outer side wall of the discharging section; a side wall cooling channel is formed between the outer side wall of the cooling jacket body and the injection mold, a bottom wall cooling channel is formed between the bottom wall of the cooling jacket body and the injection mold, and the side wall cooling channel and the bottom wall cooling channel are communicated to jointly form a cooling area. The guide raised lines are arranged in the side wall cooling channels at intervals, and the side wall cooling channels are respectively communicated with the bottom wall cooling channel in cooling areas on two sides of the guide raised lines; and the guide convex strip is arranged between a water inlet channel and a water outlet channel of the injection mold.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a novel hot nozzle cooling device for injection molds. Background Art

[0002] When food packaging containers (such as disposable fast food boxes) are injection molded, it is usually necessary to cool the hot nozzle (located at the injection point) of the injection mold to cool the plastic material point in the hot nozzle. If the temperature at the injection point is too high, it will cause wire drawing and other phenomena during plastic injection molding, thereby affecting the quality of the injection molded product.

[0003] Traditional injection mold nozzle cooling device such as Figure 1 and Figure 2 As shown, it includes a cooling jacket a and a mold b. The cooling jacket a is installed at a set position of the mold b. The outer wall of the cooling jacket a is provided with an upper sealing ring c1 and a lower sealing ring c2. The lower sealing ring c2 is arranged at the position of the outer peripheral edge of the bottom wall of the cooling jacket a. A cooling channel d is formed between the outer wall of the cooling jacket a and the mold b and between the upper sealing ring c1 and the lower sealing ring c2. The cooling channel d is annular. This structural design only cools the side wall of the cooling jacket a, and the cooling speed needs to be further improved.

[0004] In view of this, the inventor of this case conducted in-depth research, which resulted in the creation of this case. Utility Model Content

[0005] The utility model aims to provide a novel injection mold hot nozzle cooling device with faster cooling speed.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A novel injection mold hot nozzle cooling device comprises a cooling sleeve and an injection mold, wherein the injection mold is provided with an injection point recess, the cooling sleeve is installed on the injection point recess, the cooling sleeve comprises a cooling sleeve body, the outer side wall of the cooling sleeve body is provided with a guide convex strip along the sleeve center axis direction, the bottom wall of the cooling sleeve body extends along the sleeve center axis direction toward the discharge direction to form a discharge section, the bottom wall of the cooling sleeve body is located between the outer side wall of the cooling sleeve body and the outer side wall of the discharge section, and the discharge section is located below the cooling sleeve body;

[0008] The cooling jacket is provided with an upper sealing ring and a lower sealing ring, wherein the upper sealing ring is installed on the upper part of the outer side wall of the cooling jacket body, and the lower sealing ring is installed on the outer side wall of the discharge section;

[0009] A side wall cooling channel is formed between the outer wall of the cooling jacket body and the injection mold, and a bottom wall cooling channel is formed between the bottom wall of the cooling jacket body and the injection mold. The bottom wall cooling channel is annular, and the side wall cooling channel and the bottom wall cooling channel are connected to form a cooling zone, and the cooling zone is located between the upper sealing ring and the lower sealing ring;

[0010] The guide ridges are arranged in the side wall cooling channel, and the cooling areas of the side wall cooling channel on both sides of the guide ridges are respectively connected with the bottom wall cooling channel;

[0011] The injection mold is provided with a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel are respectively connected with the side wall cooling channel, and the guide convex strip is arranged between the water inlet channel and the water outlet channel.

[0012] Furthermore, the number of the guide ridges is two, namely a first guide ridge and a second guide ridge, and the first guide ridge and the second guide ridge are arranged opposite to each other on the outer side wall of the cooling jacket body.

[0013] Furthermore, the cooling areas of the side wall cooling channel on both sides of the guide ridge are independent cooling areas respectively, which are connected with the bottom wall cooling channel respectively.

[0014] After adopting the above technical scheme, the utility model provides a new type of injection mold hot nozzle cooling device, which has the following beneficial effects: not only a cooling channel is set on the outer wall of the cooling jacket, but also a cooling channel is set on the bottom wall of the cooling jacket, which not only increases the cooling area of ​​the cooling jacket, but also increases the cooling dimension of the cooling jacket, and can increase the cooling speed of the cooling jacket. The utility model is provided with a guide rib, which not only supports the cooling jacket, but also has a water-blocking effect. The guide rib is separated between the water inlet channel and the water outlet channel, and the cooling areas of the side wall cooling channel on both sides of the guide rib are respectively connected with the bottom wall cooling channel. In this way, the water introduced from the water inlet channel is guided by the guide rib and uses the gravity of the water to be introduced from the side wall cooling channel downward into the bottom wall cooling channel, and then introduced from the cooling channel from bottom to top into the side wall cooling channel, and finally discharged from the water outlet channel. This process changes the flow direction of the cooling water, increases the cooling residence time and cooling area of ​​the cooling water in the cooling zone of the cooling jacket, and compared with the structure of the traditional cooling jacket recorded in the background technology, within the same cooling time, improves the cooling effect of the cooling jacket 1, thereby better controlling the material point temperature of the injection point recess, which is conducive to more stable injection molding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a cooling jacket in the background technology;

[0016] Figure 2 It is a structural schematic diagram of a hot nozzle cooling device for an injection mold in the background technology;

[0017] Figure 3 It is a schematic diagram of the structure of the cooling jacket in the utility model;

[0018] Figure 4 It is a cross-sectional view of the hot nozzle cooling device of the injection mold in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the hot nozzle cooling device of the injection mold in the utility model.

[0020] Figure 3 to Figure 5 middle:

[0021] Cooling jacket 1; cooling jacket body 11; discharge section 12; injection mold 2; guide rib 3; upper sealing ring 41; lower sealing ring 42; side wall cooling channel 5; bottom wall cooling channel 6; water inlet channel 71; water outlet channel 72; injection point recess 8. DETAILED DESCRIPTION

[0022] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0023] The utility model discloses a new type of injection mold hot nozzle cooling device, such as Figure 3 to Figure 5 As shown, it includes a cooling jacket 1 and an injection mold 2, the injection mold 2 is provided with an injection point recess 8, the cooling jacket 1 is installed on the injection point recess 8, the cooling jacket 1 includes a cooling jacket body 11, and the outer wall of the cooling jacket body 11 is provided with a guide ridge 3 along the jacket center axis direction. Specifically, the jacket center axis of the cooling jacket 1 is located in the vertical direction.

[0024] The bottom wall of the cooling jacket body 11 extends in the direction of the discharge direction along the central axis of the jacket to form a discharge section 12, and the outer diameter of the discharge section 12 is smaller than the outer diameter of the cooling jacket body 11. The bottom wall of the cooling jacket body 11 is located between the outer side wall of the cooling jacket body 11 and the outer side wall of the discharge section 12, and the discharge section 12 is located below the cooling jacket body 11.

[0025] The cooling jacket 1 is provided with an upper sealing ring 41 and a lower sealing ring 42 . The upper sealing ring 41 is installed on the upper part of the outer side wall of the cooling jacket body 11 , and the lower sealing ring 42 is installed on the outer side wall of the discharge section 12 .

[0026] A side wall cooling channel 5 is formed between the outer wall of the cooling jacket body 11 and the injection mold 2, and a bottom wall cooling channel 6 is formed between the bottom wall of the cooling jacket body 11 and the injection mold 2. The bottom wall cooling channel 6 is annular, and the side wall cooling channel 5 and the bottom wall cooling channel 6 are connected to form a cooling zone, which is located between the upper sealing ring 41 and the lower sealing ring 42.

[0027] The guide ridges 3 are arranged in the side wall cooling channel 5 , and the cooling areas of the side wall cooling channel 5 on both sides of the guide ridges 3 are respectively connected with the bottom wall cooling channel 6 .

[0028] The injection mold 2 is provided with a water inlet channel 71 and a water outlet channel 72, which are respectively connected to the side wall cooling channel 5, the water inlet channel 71 is located on one side of the guide rib 3 in the cooling zone, and the water outlet channel 72 is located on the other side of the guide rib 3 in the cooling zone. That is, the guide rib 3 is arranged between the water inlet channel 71 and the water outlet channel 72.

[0029] The utility model discloses a novel injection mold hot nozzle cooling device, which not only sets a cooling channel on the outer wall of the cooling jacket body 11, but also sets a cooling channel on the bottom wall of the cooling jacket body 11, which not only increases the cooling area of ​​the cooling jacket 1, but also increases the cooling dimension of the cooling jacket 1, and can increase the cooling speed of the cooling jacket 1. The utility model is provided with a guide rib 3, which not only supports the cooling jacket 1, but also has a water-blocking function, and can guide the direction of the cooling water flow. The guide rib 3 is separated between the water inlet channel 71 and the water outlet channel 72, and the cooling areas of the side wall cooling channel 5 on both sides of the guide rib 3 are respectively connected to the bottom wall cooling channel 6, so that the water introduced from the water inlet channel 71 is guided by the guide rib 3 and uses the gravity of the water to be introduced from the side wall cooling channel 5 to the bottom wall cooling channel 6, and then introduced from the cooling channel 6 to the side wall cooling channel 5 from the bottom to the top, and finally discharged from the water outlet channel 72. This process changes the flow direction of the cooling water, increases the cooling residence time and cooling area of ​​the cooling water in the cooling zone of the cooling jacket 1, and compared with the structure of the traditional cooling jacket recorded in the background technology, within the same cooling time, the cooling effect of the cooling jacket 1 is improved, thereby better controlling the material point temperature of the injection point recess, which is conducive to more stable injection molding operations.

[0030] As a preferred embodiment, the number of guide ridges 3 is two, namely, a first guide ridge and a second guide ridge, and the first guide ridge and the second guide ridge are arranged on the outer side wall of the cooling jacket body 11 opposite to each other, that is, the first guide ridge and the second guide ridge are evenly arranged along the circumferential direction of the cooling jacket 1. It should be noted that in the present utility model, the number and setting position of the guide ridges 3 can be set according to actual needs.

[0031] As a preferred embodiment, the cooling areas of the side wall cooling channel 5 on both sides of the guide ridge 3 are independent cooling areas, respectively connected to the bottom wall cooling channel 6. Specifically, the protruding thickness of the guide ridge 3 is just tightly matched with the channel width of the side wall cooling channel 5 (i.e., the width of its annular channel cross section), so that the cooling water cannot be directly connected between different cooling areas of the side wall cooling channel 5, and needs to be connected through the bottom wall cooling channel 6. The flow direction of the cooling water is adjusted by setting the guide ridge 3 to improve the cooling effect.

[0032] The above embodiments and drawings do not limit the product form and style of the utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the utility model.

Claims

1. A new type of injection mold hot nozzle cooling device, characterized in that: The invention comprises a cooling jacket and an injection mold, wherein the injection mold is provided with an injection point recess, the cooling jacket is installed on the injection point recess, the cooling jacket comprises a cooling jacket body, the outer side wall of the cooling jacket body is provided with a guide convex strip along the central axis direction of the jacket, the bottom wall of the cooling jacket body extends in the direction of the discharge direction along the central axis direction of the jacket to form a discharge section, the bottom wall of the cooling jacket body is located between the outer side wall of the cooling jacket body and the outer side wall of the discharge section, and the discharge section is located below the cooling jacket body; The cooling jacket is provided with an upper sealing ring and a lower sealing ring, wherein the upper sealing ring is installed on the upper part of the outer side wall of the cooling jacket body, and the lower sealing ring is installed on the outer side wall of the discharge section; A side wall cooling channel is formed between the outer wall of the cooling jacket body and the injection mold, and a bottom wall cooling channel is formed between the bottom wall of the cooling jacket body and the injection mold. The bottom wall cooling channel is annular, and the side wall cooling channel and the bottom wall cooling channel are connected to form a cooling zone, and the cooling zone is located between the upper sealing ring and the lower sealing ring; The guide ridges are arranged in the side wall cooling channel, and the cooling areas of the side wall cooling channel on both sides of the guide ridges are respectively connected with the bottom wall cooling channel; The injection mold is provided with a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel are respectively connected with the side wall cooling channel, and the guide convex strip is arranged between the water inlet channel and the water outlet channel.

2. A novel injection mold nozzle cooling device as claimed in claim 1, characterized in that: The number of the guide ridges is two, namely a first guide ridge and a second guide ridge. The first guide ridge and the second guide ridge are arranged opposite to each other on the outer side wall of the cooling jacket body.

3. A novel injection mold nozzle cooling device as claimed in claim 1, characterized in that: The cooling areas of the side wall cooling channel on both sides of the guide ridge are independent cooling areas respectively, and are connected with the bottom wall cooling channel respectively.

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