Novel throttle valve structure

Abstract

The invention provides a novel throttle valve structure which is applied to an injection mold, a runner of the mold is arranged between a female mold core and a male mold core, the throttle valve structure comprises an insert, the insert is arranged in a containing hole in the male mold core below the runner, the appearance of the containing hole is matched with that of the insert, and the insert is arranged in the containing hole. The insert comprises a cylindrical first end part and a cylindrical second end part, the section of the insert is inverted T-shaped, a concave runner groove is formed in the surface of the first end part, and the runner groove and the runner are the same in shape; the anti-slip ring is arranged between the bottom surface of the second end part of the insert and the male mold plate, the male mold plate is provided with an accommodating groove in a position corresponding to the anti-slip ring, and the anti-slip ring is made of an elastic silica gel material. The throttling device is simple in structure and easy to machine, does not interfere with a mold supporting column, and can achieve a good throttling adjusting effect.

Description

[Technical field]

[0001] The invention relates to the technical field of mold throttle valves, in particular to a novel throttle valve structure. [Background technology]

[0002] In order to mold multiple products at one time during injection molding production, the injection mold usually adopts a multi-cavity design. When the geometric lengths of the runners in the multi-cavities are uneven, or multiple glue inlet points are set in a single cavity, in order to control the flow of each glue inlet point, it is usually necessary to set a throttle valve on the glue inlet branch line to achieve the purpose of glue inlet balance.

[0003] See also Figure 1 , Figure 1 An existing throttle valve structure is shown, which adopts a combined structure of a hexagonal screw 10 and an ejector pin 11. The hexagonal screw 10 is arranged below the flow channel 12 and installed in the male mold core 13. During the mold trial, the size of the cross-section of the flow channel 12 is changed by adjusting the matching depth between the thread of the hexagonal screw 10 and the male mold core 13, so as to achieve the purpose of adjusting the flow rate. A through hole 14 is processed in the middle of the hexagonal screw 10, and the ejection end of the ejector pin 11 is penetrated in the through hole 14. The other end of the ejector pin 11 is successively penetrated through the male mold core 13 and the male mold plate 15 and then fixed between the upper ejector plate 16 and the lower ejector plate 17. After the injection molding is completed, the ejector pin 11 moves with the upper ejector plate 16 and the lower ejector plate 17 to eject the residual material head in the through hole 14 of the hexagonal screw 10 to prevent the mold from being pulled. However, the processing procedure of this throttle valve structure is relatively complicated, and it is necessary to process the male mold core 13, the male mold plate 15, the upper top plate 16 and the lower top plate 17 of the mold. When the male mold core 13 is made of heat-treated material, discharge machining is required, which takes a long time and is costly. In addition, when there is a support column 18 below the throttle valve position, the ejector pin 11 is easy to interfere with the support column 18.

[0004] In view of this, the present invention provides a novel throttle valve structure to solve the above problems. [Summary of the invention]

[0005] In order to solve the problems of the existing throttle valve having a complex structure, a long processing time, a high cost and easy interference with the mold support column, the present invention provides a new throttle valve structure to solve the above problems.

[0006] The solution to the technical problem of the present invention is: a new type of throttle valve structure is applied to an injection mold, the mold includes an upper fixed plate, a female mold plate, a female mold core, a male mold core, a male mold plate, an upper top plate, a lower top plate and a lower fixed plate which are sequentially set up, the flow channel of the injection mold is arranged between the female mold core and the male mold core, and the throttle valve structure includes:

[0007] An insert, the insert is arranged in the male mold core below the flow channel, the male mold core is provided with a receiving hole at the insert corresponding to the insert, the shape of which matches the insert and is used to accommodate and limit the insert, the insert includes a cylindrical first end and a second end, the diameter of the first end is smaller than the diameter of the second end, a concave flow channel groove is provided on the surface of the first end, and the flow channel groove has the same shape as the flow channel;

[0008] An anti-slip ring is arranged between the bottom surface of the second end of the insert and the male template. The male template is provided with a accommodating groove at the corresponding position of the anti-slip ring for accommodating the anti-slip ring. The anti-slip ring is made of elastic silicone material and is used to buffer the injection pressure and increase the friction between the insert and the male template to prevent the insert from rotating and shifting during the injection molding process.

[0009] Preferably, the anti-slip ring is an O-ring and is vertically arranged in the accommodating groove.

[0010] Preferably, there may be multiple anti-slip rings to enhance the stability of the insert 9.

[0011] The beneficial effects of the present invention are that the present invention has a simple structure, fewer processing steps compared to the existing throttle valve structure, simple processing, and will not interfere with the mold support column. While breaking through the mold structure limitations, it can achieve a better throttling adjustment effect.

Brief Description of the Drawings

[0012] Figure 1 The present invention is a schematic diagram of the structure of a throttle valve in a mold in the prior art.

[0013] Figure 2 It is a structural schematic diagram of the novel throttle valve structure of the present invention in a mold.

[0014] Figure 3 yes Figure 2 Enlarged schematic diagram at point A in the middle.

[0015] Figure 4 It is a schematic diagram of the insert structure in the novel throttle valve structure of the present invention. [Specific implementation method]

[0016] To further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0017] The present invention provides a novel throttle valve structure, which is applied to an injection mold. The mold includes an upper fixed plate 2, a female mold plate 3, a female mold core 30, a male mold core 40, a male mold plate 4, an upper top plate 5, a lower top plate 6 and a lower fixed plate 7 which are sequentially set up. The flow channel 8 of the injection mold is arranged between the female mold core 30 and the male mold core 40. The throttle valve structure includes:

[0018] The insert 9 is arranged in the male mold core 40 and arranged below the flow channel 8. The male mold core 40 is provided with a receiving hole 400 corresponding to the insert 9, and its shape matches the insert 9, and is used to accommodate and limit the insert 9. The insert 9 includes a cylindrical first end 90 and a second end 91. The diameter of the first end 90 is smaller than the diameter of the second end 91, so that the cross section of the insert 9 is inverted T shape. The surface of the first end 90 is provided with a concave flow channel groove 92, and the flow channel groove 92 can be connected with the flow channel 8. The flow channel groove 92 has the same shape as the flow channel 8. The flow channel groove 92 and the flow channel 8 can be rotated to form a deflection angle with the flow channel 8, thereby adjusting the injection flow rate of the flow channel 8;

[0019] The anti-slip ring 93 is arranged between the bottom surface of the second end 91 of the insert 9 and the male template 4. The male template 4 is provided with a accommodating groove 41 at the corresponding position of the anti-slip ring 93 for accommodating the anti-slip ring 93. The anti-slip ring 93 is made of elastic silicone material, which can buffer the injection pressure and increase the friction between the insert 9 and the male template 4 during the injection molding process, thereby preventing the insert 9 from rotating and shifting during the injection molding process.

[0020] Among them, the anti-slip ring 93 is an O-ring and is vertically arranged in the accommodating groove 41. During the adjustment of the insert 9, the O-ring produces elastic deformation and can apply a rebound force to the insert 9 to help the insert 9 buffer the injection pressure and prevent the insert 9 from shifting during the injection molding process.

[0021] There may be more than one O-ring to enhance the stability of the insert 9 .

[0022] The working principle of the present invention is: during mold trial, force is applied to the protrusions on both sides of the flow channel 92 of the first end 90 of the insert 9 by knocking or other means, so that the insert 9 is rotated to a suitable angle. At this time, the flow channel 92 on the surface of the first end 90 of the insert 9 will produce an angle with the flow channel 8 on the male mold core 40, thereby adjusting the glue flow rate of the flow channel 8 at this location. At the same time, the anti-slip ring 93 increases the friction between the insert 9 and the male mold plate 4, and can apply a rebound force to the insert 9, thereby preventing the insert 9 from rotating and shifting during the injection molding process, and buffering the injection pressure during the injection molding process, thereby improving the stability of the throttle valve structure.

[0023] The beneficial effects of the present invention are that the present invention has a simple structure, fewer processing steps compared to the existing throttle valve structure, simple processing, and will not interfere with the mold support column 100. While breaking through the limitations of the mold structure, it can achieve a better throttling adjustment effect.

[0024] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A novel throttle valve structure is applied to an injection mold, wherein the mold comprises a female mold plate, a female mold core, a male mold core, and a male mold plate, and the flow channel of the injection mold is arranged between the female mold core and the male mold core, and is characterized in that: The throttle valve structure comprises: An insert, the insert is arranged in the male mold core below the flow channel, the male mold core is provided with a receiving hole at the insert corresponding to the insert, the shape of which matches the insert and is used to accommodate and limit the insert, the insert includes a cylindrical first end and a second end, the diameter of the first end is smaller than the diameter of the second end, a concave flow channel groove is provided on the surface of the first end, and the flow channel groove has the same shape as the flow channel; The anti-slip ring is arranged between the bottom surface of the second end of the insert and the male template. The male template is provided with a accommodating groove at the corresponding position of the anti-slip ring for accommodating the anti-slip ring. The anti-slip ring is made of elastic silicone material.

2. A novel throttle valve structure as claimed in claim 1, characterized in that: The anti-slip ring is an O-ring and is vertically arranged in the accommodating groove.

3. A novel throttle valve structure as claimed in claim 1, characterized in that: There may be a plurality of anti-slip rings.

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