CN103847071B - Anti-drawing-die syllogic cow glue powder - Google Patents

Abstract

The three-stage horn gate of the anti-drawing mold, the shape of the horn gate is like a horn-shaped curved cone, and its cross-sectional size gradually decreases. The horn gate includes: a front gate, which is located between the horn gate and the horn gate. The connection of the product; the first gate, which is connected to the front gate, the center line of the first gate is a first arc, and the first arc is smooth with the center line of the front gate Transition; the second gate, which is connected to the first gate, the center line of the second gate is a second arc, and the second arc and the first arc are smoothly transitioned; the third gate , which connects the second gate, the centerline of the third gate is a third arc, and the third arc transitions with the second arc. The horn gate has the following advantages: it can be effectively demoulded, and it is not easy to be deformed and broken during the ejection process; it can improve the quality of the product and prevent the product from being easily dented and deformed; it can reduce the molding cycle, Increase production capacity.

Description

Anti-pull die three-stage horn gate

【Technical field】

The invention relates to a gate form in a mould, in particular to a three-stage horn gate of an anti-draw mold.

【Background technique】

In the latent injection, the horn-type latent injection is generally used, and the shape of the horn gate is formed by a smooth arc defining the diameters at both ends. As shown in Figure 1, it is a horn gate 10 in the prior art. When the thimble pushes up the material head 11 formed in the horn gate 10, it moves along the arc direction of the upper surface 12 of the mold cavity, although the The horn gate 10 has a smooth shape, but the friction area between the material head 11 and the upper surface 12 of the cavity is about 2/3 of the upper surface of the cavity wall, so that the material head 11 is not smooth when demoulding, and the During the process, the material head 11 is easily deformed and broken, which will also cause the formed product to be dented and deformed.

In view of this, it is necessary to provide a corner gate, so that the contact area between the head formed in the corner gate and the upper surface of the mold cavity becomes smaller, so that the material head and the corner gate can be demoulded smoothly, and the molding failure is avoided. The product has problems of film pulling and deformation.

【Content of invention】

Therefore, the present invention provides a three-stage corner gate of the anti-drawing mold, which reduces the contact area between the material head in the corner gate and the surface of the mold cavity during demoulding, thereby making the demoulding more smooth. , can further improve the quality of the product.

In order to achieve the above purpose, the present invention provides a three-stage horn gate for the anti-drawing mold, which is applied to products that require latent glue feeding in the mold. The shape of the horn gate is like a horn-like curved cone and its cross-sectional size Tapered, the horn gate includes:

Front gate, which is located at the connection between the corner gate and the product;

The first gate is connected to the front gate, the center line of the first gate is a first arc, the first arc and the center line of the front gate are smoothly transitioned, and the front gate The cross-sectional dimension of is smaller than the cross-sectional dimension of the first gate;

The second gate is connected to the first gate, the center line of the second gate is a second arc, and the second arc and the first arc transition smoothly, and the first gate The cross-sectional dimension of is smaller than the cross-sectional dimension of the second gate;

The third gate is connected to the second gate, the center line of the third gate is a third arc, the third arc and the second arc are smoothly transitioned, and the second gate The cross-sectional dimension of is smaller than the cross-sectional dimension of the third gate.

Preferably, the radius of the first arc is greater than the radius of the second arc.

Preferably, the radius of the second arc is greater than the radius of the third arc.

Preferably, the included angle between the center line of the front gate and the vertical direction is 45°.

Preferably, the cross section of the front gate is tapered.

Preferably, the two hypotenuses of the taper are tangent to the first gate.

When the three-section horn gate of the anti-drawing mold of the present invention is demoulding, the friction area between the material head in the horn gate and the upper surface of the cavity wall is about 1/3 of the upper surface of the cavity wall, and the rest of the material The head part is evacuated from the upper surface of the mold cavity, thereby reducing the contact area between the material head and the wall of the mold cavity.

Compared with the prior art, the three-stage horn gate of the anti-drawing mold of the present invention has the following advantages: it can effectively demould, and it is not easy to be deformed and broken during the ejection process; it can improve the quality of the product and prevent the product from being easily pulled The occurrence of concave and easy deformation; it can reduce the molding cycle and increase production capacity.

【Description of drawings】

FIG. 1 is a side sectional view of a horn gate in the prior art.

Fig. 2 is a side cross-sectional view of the three-stage horn gate of the anti-pull mold of the present invention.

【detailed description】

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The three-stage corner gate of the anti-drawing mold provided by the present invention is applied to products that require latent glue feeding in the mold. Please refer to Figure 2 for illustration. 100 is a product that needs latent glue feeding. Like a horn-like curved cone with tapered cross-sectional dimensions, the horn gate includes:

Front gate 210, which is located at the joint between the horn gate 200 and the product 100;

The first gate 220 is connected to the front gate 210, the center line of the first gate 220 is a first arc, and the first arc transitions smoothly with the center line of the front gate 210, so The cross-sectional dimension of the front gate 210 is smaller than the cross-sectional dimension of the first gate 220;

The second gate 230 is connected to the first gate 220, the centerline of the second gate 230 is a second arc, the second arc transitions smoothly with the first arc, and the second arc transitions smoothly with the first arc. A cross-sectional dimension of a gate 220 is smaller than a cross-sectional dimension of the second gate 230;

The third gate 240 is connected to the second gate 230, the center line of the third gate 240 is a third arc, and the third arc and the second arc are smoothly transitioned, and the third arc is smoothly transitioned to the second arc. The cross-sectional dimension of the second gate 230 is smaller than the cross-sectional dimension of the third gate 240 .

Wherein, the radius R1 of the first arc is larger than the radius R2 of the second arc.

Wherein, the radius R2 of the second arc is larger than the radius R3 of the third arc.

Wherein, the included angle between the centerline of the front gate 210 and the vertical direction is 45°.

Wherein, the cross section of the front gate is tapered.

Wherein, the two hypotenuses of the taper are tangent to the first gate 220 .

In this embodiment, the diameter of the cross-section at the end of the first gate 220 connected to the front gate 210 cannot be too large. If the diameter of the cross-section is larger, the angle corresponding to the plane projection of the cross-section The smaller it is, the less it will be conducive to demoulding. When the anti-drawing mold three-section horn gate 200 of the present invention is demolded, the material head 201 in the anti-drawing mold three-section angle gate 200 is pushed upward by a thimble, and at this time, the material head 201 extends along the mold cavity wall The upper surface moves in a radian direction. Since R1 is greater than R2 and R2 is greater than R3 at this time, the friction area between the material head 201 and the upper surface of the cavity wall is only about 1/3 of the upper surface of the cavity wall. About 2/3 of the area is in an empty state, so that the material head 201 can be demolded smoothly.

Compared with the prior art, the three-stage horn gate of the anti-drawing mold of the present invention has the following advantages: it can effectively demould, and it is not easy to be deformed and broken during the ejection process; it can improve the quality of the product and prevent the product from being easily pulled The occurrence of concave and easy deformation; it can reduce the molding cycle and increase production capacity.

It should be pointed out that the present invention is not limited to the above-mentioned embodiments, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any skilled person based on the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (4)

1. an anti-drawing-die syllogic cow glue powder, it is applied to the product that needs submarine type glue feeding in mould,The shape of this cow glue powder is dwindled gradually as the shaped form cone of ox horn formula and its sectional dimension, it is characterized in that,This cow glue powder comprises successively:

Front end cast gate, it is located at described cow glue powder and described product connection;

The first cast gate, it connects described front end cast gate, and the center line of this first cast gate is the first circular arc, described inThe center line rounding off of the first circular arc and described front end cast gate, the sectional dimension of described front end cast gate is less than thisThe sectional dimension of the first cast gate;

The second cast gate, it connects described the first cast gate, and the center line of this second cast gate is the second circular arc, described inThe second circular arc and described the first circular arc rounding off, the sectional dimension of described the first cast gate is less than this second cast gateSectional dimension, the radius of described the first circular arc is greater than the radius of described the second circular arc;

The 3rd cast gate, it connects described the second cast gate, and the center line of the 3rd cast gate is three-arc, described inThree-arc and described the second circular arc rounding off, the sectional dimension of described the second cast gate is less than the 3rd cast gateSectional dimension, the radius of described the second circular arc is greater than the radius of described three-arc.

2. anti-drawing-die syllogic cow glue powder according to claim 1, is characterized in that described front endThe center line of cast gate and the angle of vertical direction are 45 °.

3. anti-drawing-die syllogic cow glue powder according to claim 1, is characterized in that described front endThe cross section of cast gate is taper.

4. anti-drawing-die syllogic cow glue powder according to claim 3, is characterized in that described taperTwo hypotenuses and described the first cast gate tangent.