A uniform cooling device for injection mold

Abstract

The present invention discloses a uniform cooling device for an injection mold, which includes a plunger, a serrated water baffle, a serrated sheet, a water baffle plate, a core, a fixed module, a runner, etc. The plunger and the serrated water baffle plate are assembled and fixed by a dovetail groove; the water baffle plate is clamped and fixed from the side square groove of the serrated water baffle plate; the serrations on the serrated water baffle plate include triangular serrations, an elastic membrane, and a hot metal sheet. The present invention adjusts the water flow area by pulling the elastic membrane to translate due to the thermal deformation of the hot metal sheet, thereby being able to flexibly control the flow rate and achieve regulation of the cooling effect. Compared with the prior art, the present invention has the advantages of adjustable coolant flow rate, achieving uniform cooling effect of the injection mold, and a wide range of applications.

Description

Technical Field

[0001] The invention relates to a uniform cooling device for an injection mold. Background Art

[0002] Plastic products have the advantages of low cost and strong plasticity. They are widely used in the national economy. The plastic industry occupies an extremely important position in the world today. my country has become a major producer of plastic products in the world. Faced with fierce competition in the mold injection molding industry, the cost of molds and injection molding production is particularly important. If the cooling effect set in the mold is not good, it will not only affect the life of the mold but also increase the cost of mold and injection molding production. At present, in the injection mold, during the cooling process after injection molding, most of them need to use conventional water-proof sheets to achieve mold cooling effect. However, at present, non-symmetrical parts cannot achieve uniform cooling effect during the injection molding process, resulting in uneven surface heating and easy stress, which leads to cracks and other problems. Summary of the invention

[0003] In view of the above problems, the present invention provides a uniform cooling device for injection molds. Compared with the prior art, the present invention has the advantages of adjustable coolant flow rate, achieving uniform cooling effect for injection molds, and wide application range.

[0004] Technical solution: A uniform cooling device for an injection mold, characterized in that it includes an injection molding device consisting of a core (1), an injection port (2), and a fixed module (3); a flow channel cooling device consisting of a plunger (4), a serrated water baffle (5), a water baffle (6), a liquid inlet (7-1), a water well (7-2), a flow channel (7-3), and a liquid outlet (7-4); a serrated plate device consisting of a triangular sawtooth (5-31), an elastic membrane (5-32), and a thermal bimetallic strip (5-33), wherein the plunger (4) and the serrated water baffle (5) are assembled and fixed by a dovetail groove, the water baffle (6) is clamped and fixed from the side of the serrated water baffle (5), and the plunger (4) and the water well (7-2) are clamped in a transitional fit.

[0005] In the present invention, the plunger member (4) comprises a hexagonal block (4-1), a plunger (4-2), a groove (4-3), and a dovetail groove (4-4); the hexagonal block (4-1) and the plunger (4-2) are welded together; the dovetail groove (4-4) is designed to be 45° to 50°, and the height of the dovetail groove (4-4) is the same as the width of the serrated water barrier (5).

[0006] In the present invention, a groove (5-2) is provided on the side of the sawtooth water-blocking sheet (5) for accommodating a water-blocking plate (6), a plurality of circular holes are provided on the water-blocking plate (6), and a square groove (5-4) is provided on the sawtooth water-blocking sheet (5) for water to flow through; the sawtooth water-blocking sheet (5) is clamped in the water well (7-2), and the sawtooth sheet (5-3) is close to one side of the injection mold.

[0007] In the present invention, the thermal bimetallic strip (5-33) is made of brass and nickel steel, and the thermal expansion coefficient α1 of the brass is 22.8 x 10 -6 The thermal expansion coefficient α2 of the nickel steel is 1x 10 -6 Up to 2x 10 -6 . BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 , 2 Schematic diagram of injection mold structure

[0009] Figure 3 Sawtooth water barrier device

[0010] Figure 4 Front view of the plunger

[0011] Figure 5 Bottom view of the plunger

[0012] Figure 6 A partial cross-sectional view of the serrated water barrier

[0013] Figure 7 For baffles

[0014] Figure 8 Flatten the flow path section

[0015] Fig. 9 The main view of the serrated blade being deformed by heat

[0016] The reference numerals are explained as follows: core (1), injection port (2), fixed module (3), plunger (4), serrated water baffle (5), water baffle (6), flow channel device (7), sealing ring (8), hexagonal block (4-1), plunger (4-2), groove (4-3), dovetail groove (4-4), dovetail groove guide rail (5-1), groove (5-2), serrated plate (5-3), triangular serration (5-31), elastic membrane (5-32), thermal bimetallic strip (5-33), square groove (5-4), liquid inlet (7-1), water well (7-2), flow channel (7-3), liquid outlet (7-4).

[0017] Specific implementation cases

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0019] According to the accompanying drawings Figures 1 to 9 As shown, the present invention proposes a uniform cooling device for an injection mold, which is characterized by comprising: a core 1, an injection port 2, a fixed module 3, a plunger member 4, a serrated water baffle 5, a water baffle 6, a flow channel device 7, a hexagonal block 4-1, a plunger 4-2, a groove 4-3, a dovetail groove 4-4, a dovetail groove guide rail 5-1, a groove 5-2, a serrated piece 5-3, a triangular serration 5-31, an elastic membrane 5-32, a thermal bimetallic sheet 5-33, a square groove (5-4), a liquid inlet 7-1, a water well 7-2, a flow channel 7-3, and a liquid outlet 7-4.

[0020] The present invention is further described below in conjunction with the accompanying drawings:

[0021] Injection molding starts from the injection port 2, and the molding material fills the core 1. At this time, the fixed module 3 is affected by the heat transfer and the temperature rises. Cooling water is introduced into the runner device 7, and the cooling water flows through the liquid inlet 7-1, the water well 7-2, the runner 7-3, and the liquid outlet 7-4 to achieve the cooling effect of the injection molded part. The serrated water baffle 5 is clamped in the water well 7-2, and a certain distance is left at the end to achieve the flow of cooling water to cool the injection molded part. In addition, the cooling water can also flow from the gap of the serrated piece 5-3 on one side of the serrated water baffle 5, and the elasticity of the serrated piece 5-3 is used to realize water flow regulation to achieve control of the cooling effect. At this time, according to the shape of the core 1, such as Figure 1 As shown, the sawtooth piece 5-3 begins to deform due to heat. The heat is high at the core 1 far away from the injection port 2, and the heat is low near the injection port. The hot bimetallic strip 5-33 bends due to heat. The greater the degree of bending is at the point where the heat is the highest, the elastic film 5-32 is pulled to move together. On the contrary, the smaller the degree of bending is at the point where the heat is the lowest. Fig. 9 As shown. At the point where the curvature is the largest, the smaller the area of ​​the serrated piece 5-3 through which the water flows in the flow channel 7-3, the greater the flow rate, the faster the water solution alternates, and the better the cooling effect, so that the areas with high heat on the surface of the injection molded part are cooled, and the areas with low heat are cooled slowly, thereby achieving a uniform cooling effect on the surface of the injection molded part. In addition, the porous water-blocking plate 6 shown is inserted into the serrated water-blocking plate 5, and the elliptical area is designed to be smaller near the area with high heat, so that the cooling water flows faster, and the elliptical area is designed to be larger near the area with low heat, so that the cooling water flows slower, so as to achieve a uniform cooling effect on the surface of the injection molded part. By utilizing the water-blocking plate 6 and the elastic serrated piece 5-3 to better realize the regulation of the cooling water flow rate, a uniform cooling effect on the surface of the injection molded part can be quickly achieved.

[0022] The device can be used to realize the function of adjustable coolant flow rate, achieve uniform cooling effect of injection mold, have a wide range of applications, reduce various product defects caused by uneven cooling, and improve production efficiency.

[0023] The above-mentioned embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A uniform cooling device for an injection mold, characterized in that: The invention comprises an injection molding device composed of a core (1), an injection port (2), and a fixed module (3); a flow channel cooling device composed of a plunger (4), a sawtooth water baffle (5), a water baffle (6), a liquid inlet (7-1), a water well (7-2), a flow channel (7-3), and a liquid outlet (7-4); and a sawtooth plate (5-3) device composed of a triangular sawtooth (5-31), an elastic membrane (5-32), and a thermal bimetallic plate (5-33). The plunger (4) and the sawtooth water baffle (5) are assembled and fixed by a dovetail groove, the water baffle (6) is clamped and fixed from a side square groove of the sawtooth water baffle (5), the plunger (4) and the water well (7-2) are clamped by transition fit, and the thermal bimetallic plate (5-33) is composed of brass and nickel steel, and the thermal expansion coefficient α1 of the brass is 22.8x10 -6 The thermal expansion coefficient α2 of the nickel steel is 1x 10 -6 Up to 2x 10 -6 .

2. The uniform cooling device for injection mold according to claim 1, characterized in that: The plunger member (4) comprises a hexagonal block (4-1), a plunger (4-2), a groove (4-3), and a dovetail groove (4-4); the hexagonal block (4-1) and the plunger (4-2) are welded together; the dovetail groove (4-4) is designed to be 45° to 50°, and the height of the dovetail groove (4-4) is the same as the width of the sawtooth water barrier (5).

3. The uniform cooling device for injection mold according to claim 1, characterized in that: The sawtooth water-blocking sheet (5) is provided with a groove (5-2) on the side thereof for accommodating a water-blocking plate (6); the water-blocking plate (6) is provided with a plurality of circular holes; and the sawtooth water-blocking sheet (5) is provided with a square groove (5-4) for water to flow through; the sawtooth water-blocking sheet (5) is clamped in the water well (7-2), and the sawtooth sheet (5-3) is close to one side of the injection mold.

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