Mold cooling well

Abstract

A mold cooling well belongs to mold technology, is arranged in a plastic mold, is located at a plastic part injection cavity, provides uniform cooling effect for the injection cavity, and comprises at least one cooling well, a water isolation piece with a water passing hole is arranged in the cooling well, the water isolation piece comprises a split type fixing part and a sliding part, the fixing part is in interference fit with the inner wall of the cooling well, the sliding part is in sliding fit with the fixing part along the axis direction of the cooling well, the front end of the sliding part is provided with a water outlet, the size of the water outlet flow area can be adjusted by moving the sliding part forward and backward, the flow of the water outlet to the bottom of the cooling well is adjusted, and the cooling effect is adjusted, and the effect is remarkable.

Description

Technical Field

[0001] This utility model belongs to the field of mold forming technology, and particularly relates to plastic molds, specifically a structure for cooling a specific location on a plastic mold. Background Technology

[0002] In the toy manufacturing industry, plastic molds are often used to injection mold toy parts. Many of these parts are not flat but have uneven surfaces. When using plastic molds for injection molding, these products are difficult to mold using traditional cooling channels. Traditional mold cooling channels are mostly straight lines or simple curves, and their path design is ill-suited to products with varying elevations. For raised areas, the water channels are too far from the cavity surface, resulting in insufficient heat dissipation; for recessed areas, the water channels tend to adhere too closely to the surface, leading to localized overcooling. This uneven cooling can cause defects such as shrinkage marks, stress deformation, and differences in crystallinity, while also prolonging the molding cycle and reducing production stability and yield.

[0003] In the prior art, some improved solutions improve cooling by increasing the number of water channels. However, even with directional heat dissipation structures designed for areas with elevation differences, there is still a problem of local heat accumulation. Existing patent CN116175913A discloses a cooling mechanism for injection molds. Based on the original mold cooling water channel scheme, it sets up cooling water wells of different depths and installs guide plates with water passage holes in the cooling water wells. The guide plates with water passage holes divert the cooling water, allowing the cooling water to flow to the bottom of the cooling water wells, thereby achieving uniform cooling of the plastic parts.

[0004] However, since the depth of the cooling water well is determined after the mold design and manufacturing are completed, in actual operation, changes in ambient temperature, cooling water temperature, pressure, or injection molding materials can all affect the cooling uniformity of different parts of the plastic mold, which seriously affects the actual application effect of the plastic mold. Therefore, there is an urgent need for a mold cooling structure with strong adaptability. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention proposes a mold cooling water well that achieves a uniform, precise, and highly adaptable cooling effect for plastic molds.

[0006] The technical problem to be solved by this utility model is achieved through the following technical solution:

[0007] A mold cooling water well is provided in a plastic mold. The plastic mold includes an upper mold plate, a lower mold plate, and an upper mold core and a lower mold core disposed between the upper and lower mold plates. An injection cavity is provided between the upper and lower mold cores, and the injection cavity has an undulating state. The mold cooling water well includes at least one cooling water well, and the bottom of the cooling water well is equidistant from the injection cavity. A water baffle with water passage holes is provided inside the cooling water well. In this utility model, the water baffle includes a separate fixed part and a sliding part. The fixed part is interference-fitted with the inner wall of the cooling water well, and a gap is left at the central axis of the cooling water well. The sliding part is disposed in the gap and slides with the fixed part along the axis of the cooling water well. A water outlet is provided at the front end of the sliding part.

[0008] In this invention, a water outlet with an adjustable length is formed between the front end of the sliding part and the fixed part, and a water passage is provided in the middle of the sliding part.

[0009] Furthermore, the fixing part is provided with a conical or spherical support crown at the bottom of the cooling water well, and the left and right sides of the fixing part are fixedly connected to the support crown. The support crown and the front end of the sliding part surround the water outlet.

[0010] Furthermore, the wellhead of the cooling water well is sealed by a sealing plug, and an adjusting screw is threaded through the sealing plug. The adjusting screw is threadedly connected to the sealing plug. One end of the adjusting bolt located inside the sealing plug is rotatably connected to the tail of the sliding end, and the tail of the sliding end extends into the sealing plug. The other end of the adjusting bolt is set as an adjustable interface, preferably a slotted or hexagonal groove. The adjusting bolt can be adjusted by using a screwdriver to adjust the size of the flow surface of the water outlet.

[0011] In this invention, the sliding part is nested and connected to the fixing part through I-shaped grooves on both sides.

[0012] Furthermore, an elastic sealing strip is provided at the connection between the sliding part and the fixed part.

[0013] In this invention, the water-blocking plate is fixedly connected to the inner wall of the cooling water well, and an elastic sealing strip is provided at the connection point, with the elastic sealing strip forming protrusions on both sides of the connection point.

[0014] Furthermore, a wavy metal spring is provided at the outer edge of the water-proof sheet, and the two sides of the metal spring are sealed by elastic sealing strips.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) This application uses a water baffle to force the cooling water to flow through the bottom of the cooling water well, thereby achieving uniform cooling of the injection molding cavity at close range;

[0017] (2) This application mixes and neutralizes the cooling water flowing through the bottom of the cooling water well and the cooling water flowing through the water passage, so that the temperature rise of the cooling water is not obvious when the cooling water flows into the next stage of the cooling water well, thereby stabilizing the cooling effect of each cooling water well and making the cooling effect uniform.

[0018] (3) This application adjusts the flow rate of cooling water flowing through the bottom of the cooling water well by adjusting the sliding part of the water baffle, so that the plastic mold can adapt to the injection molding requirements of cooling requirements, the cooling effect is precise and controllable, and the adaptability is strong.

[0019] (4) By setting up a multi-stage elastic sealing structure, this application can achieve an effective sealing effect when dealing with high-pressure cooling water. The metal spring sheet set on the outer edge of the water-proof sheet can compensate for the gap change caused by sliding adjustment through pre-tightening force, resulting in a good sealing effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the overall structure and installation location of this application;

[0021] Figure 2 This is a schematic diagram illustrating the structure and principle of a single cooling water well in this application;

[0022] Figure 3 This is a schematic diagram of the water-stop sheet structure of this application;

[0023] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point AA.

[0024] In the diagram: 1. Upper mold plate; 2. Lower mold plate; 3. Upper mold core; 4. Lower mold core; 5. Injection cavity; 6. Cooling water well; 7. Water baffle; 8. Water flow channel; 9. Water inlet; 10. Water outlet; 11. Support crown; 12. Water passage hole; 13. Sprue; 14. Sealing plug; 15. Adjusting bolt; 16. Adjustable interface; 17. Fixing part; 18. Sliding part; 19. Elastic sealing strip; 20. Metal spring. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0026] A mold cooling water well is installed in a plastic mold, such as Figure 1As shown, the plastic mold includes an upper mold plate 1, a lower mold plate 2, and an upper mold core 3 and a lower mold core 4 disposed between the upper mold plate 1 and the lower mold plate 2. An injection cavity 5 is disposed between the upper mold core 3 and the lower mold core 4. The injection cavity 5 has an undulating state. The lower mold core 4 is provided with parallel cooling water wells 6. The bottom of the cooling water wells 6 is close to the injection cavity 5 to provide cooling. Adjacent cooling water wells 6 are connected through a water flow channel 8. The lower mold plate 2 is provided with a water inlet 9 and a water outlet 10 that connect the water flow channel 8 to the outside.

[0027] exist Figure 2 The cooling water well 6 contains a water baffle 7 with water passage holes 12. A conical support crown 11 is fixedly connected to the water baffle 7 at the bottom of the cooling water well 6. A sealing plug 14 is provided at the opening of the cooling water well 6. The water baffle 7... Figure 3 As shown, the device includes a separate fixing part 17 and a sliding part 18. The fixing part 17 is interference-fitted with the inner wall of the cooling water well 6. The fixing part 17 is symmetrically separated from the center. The sliding part 18 is located in the center of the two halves of the fixing part 17 and is slidably fitted with the fixing part 17, sliding freely along the axis of the cooling water well 6. The front end of the sliding part 18 and the support crown 11 form an adjustable water outlet 13. The tail end of the sliding part 18 is inserted into the sealing plug 14 and is rotatably connected to an adjusting bolt 15. The adjusting bolt 15 passes through the sealing plug 14 and is threadedly connected to it. The tail end of the adjusting bolt 15 extends out of the sealing plug 14 and is provided with an adjustable interface 16, which can be a slotted or hexagonal groove. The adjusting bolt 15 can be adjusted by using a screwdriver that mates with it.

[0028] The rotatable connection between the adjusting bolt 15 and the tail end of the sliding part 18 can be achieved through the following structure: the end of the adjusting bolt 15 is provided with an annular groove, and the tail end of the sliding part 18 is provided with a recessed mounting groove. Both edges of the mounting groove are provided with a meandering portion towards the center, which hooks into the annular groove at the end of the adjusting bolt 15. When the adjusting bolt 15 rotates and extends and retracts within the sealing plug 14, the meandering portion of the sliding part 18 rotates along the annular groove and extends and retracts within the pre-set slot of the sealing plug 14.

[0029] exist Figure 4 In the middle, the sliding part 18 is nested and connected to the fixing part 17 through the I-shaped grooves on both sides. An elastic sealing strip 19 is provided at the connection. The outer side of the fixing part 17 is fixedly connected to the inner wall of the cooling water well 6. An elastic sealing strip 19 is provided at the connection. The elastic sealing strip 19 is piled up into protrusions on both sides of the connection. A wavy metal spring 20 is provided on the side edge of the fixing part 17. The two sides of the metal spring 20 are sealed by the elastic sealing strip 19.

[0030] This invention is applied to the cooling of uneven plastic parts during injection molding using plastic molds. High-pressure cooling water enters the lower mold plate 2 from the water inlet 9 and then enters the lower mold core 4. It then enters the cooling water well 6 through the water flow channel 8. Some of the cooling water flows along the water baffle 7 to the bottom of the cooling water well 6, passes through the water outlet 13 to the other side of the water baffle 7 in the cooling water well 6, and returns from the bottom of the cooling water well 6 to the water flow channel 8, carrying away the heat energy in the cooling water well 6. It mixes with another part of the cooling water that passes through the water passage 12 to neutralize the average water temperature, and then enters another adjacent cooling water well 6 through the water flow channel 8. The above process is repeated until it passes through all the cooling water wells 6, flows out of the lower mold core 4 through the water flow channel 8, and flows out from the water outlet 10 of the lower mold plate 2, thus achieving the cooling of the injection cavity 5. To adjust the cooling effect, open the lower template 2 and use a screwdriver to adjust the adjusting bolt 15. As the adjusting bolt 15 moves back and forth or backward within the sealing plug 14, it moves the sliding part 18 of the water baffle 7, adjusting the size of the water outlet 13. This allows for adjustment of the flow surface size of the water outlet 13, thereby adjusting the flow rate of cooling water from the water channel 8 to the bottom of the cooling water well 6, and thus adjusting the cooling effect.

[0031] In summary, based on the above structure and working process, it can be seen that the mold cooling water well of this application effectively achieves a uniform, precise, and highly adaptable cooling effect on the injection cavity of the plastic mold, with significant results.

Claims

1. A mold cooling water well, disposed in a plastic mold, the plastic mold including an upper mold plate, a lower mold plate, and an upper mold core and a lower mold core disposed between the upper mold plate and the lower mold plate, an injection cavity being disposed between the upper mold core and the lower mold core, the injection cavity having an undulating shape, the mold cooling water well including at least one cooling water well, the bottom of the cooling water well being equidistant from the injection cavity, and a water-blocking plate with water passage holes being disposed inside the cooling water well, characterized in that: The water-blocking plate includes a separate fixed part and a sliding part. The fixed part is interference-fitted with the inner wall of the cooling water well. The fixed part has a gap at the central axis of the cooling water well. The sliding part is set in the gap and slides with the fixed part along the axis of the cooling water well. The front end of the sliding part is provided with a water outlet. The water-blocking plate is fixedly connected to the inner wall of the cooling water well. An elastic sealing strip is provided at the connection. The elastic sealing strip is raised on both sides of the connection. A wavy metal spring is provided at the outer edge of the water-blocking plate. The two sides of the metal spring are sealed by the elastic sealing strip.

2. The mold cooling water well according to claim 1, characterized in that: A water outlet with an adjustable length is formed between the front end of the sliding part and the fixed part, and a water passage is provided in the middle of the sliding part.

3. The mold cooling water well according to claim 2, characterized in that: The fixing part has a conical or spherical support crown at the bottom of the cooling water well. The left and right sides of the fixing part are fixedly connected to the support crown, and the support crown and the front end of the sliding part surround the water outlet.

4. The mold cooling water well according to claim 2, characterized in that: The wellhead of the cooling water well is sealed by a sealing plug. An adjusting screw is installed inside the sealing plug and is threadedly connected to the sealing plug. One end of the adjusting bolt located inside the sealing plug is rotatably connected to the tail of the sliding end, and the tail of the sliding end extends into the sealing plug. The other end of the adjusting bolt is set as an adjustable interface.

5. The mold cooling water well according to claim 1, characterized in that: The sliding part is nested and connected to the fixed part through I-shaped grooves on both sides.

6. The mold cooling water well according to claim 5, characterized in that: An elastic sealing strip is provided at the connection between the sliding part and the fixed part.

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