CN211440969U

CN211440969U - Rubber feeding system for curved gate

Info

Publication number: CN211440969U
Application number: CN201922151987.8U
Authority: CN
Inventors: 张常友
Original assignee: Tianjin Refull Tianke Mold&die Co ltd
Current assignee: Tianjin Refull Tianke Mold&die Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-09-08
Anticipated expiration: 2029-12-03

Abstract

The utility model provides a crooked radian runner advances gluey system, including setting up runner in runner cover on movable mould benevolence and the runner of setting in movable mould benevolence, runner in the movable mould benevolence includes convex runner and sharp runner, in the runner mold insert of convex runner setting on movable mould benevolence be equipped with into runner on the runner mold insert, the radian of convex runner is from advancing gluey mouthful grow gradually and transition to sharp runner be equipped with trapezoidal crooked recess on the sharp runner. The gate of the gate glue feeding system with the large bending radian is arranged on the inner side wall of the plastic product with the thin top surface and high appearance quality requirement, the glue feeding position of the product is not limited by the plastic product with the thin top surface, and automatic production can be realized, so that the production efficiency is improved, the production cost is reduced, the perfect appearance quality requirement of the product can be ensured, and meanwhile, the structure is easy to manufacture, low in failure rate, safe, reliable and convenient to maintain.

Description

Rubber feeding system for curved gate

Technical Field

The utility model relates to an injection mold makes and produces the field, especially relates to a system is advanced to gluey in crooked radian runner.

Background

In the prior art, a plurality of glue inlet systems are provided, such as a side gate, a point gate, a submarine thimble gate, a horn gate, and the like. The glue feeding system capable of realizing automatic gate breaking can be roughly divided into 2 types, one type is a glue feeding system on the surface of a product, such as a submarine gate and a point gate, and the glue feeding system can realize automation and simultaneously cause gate residues on the surface of the glue-fed product to influence the appearance quality of the product; the other type is a glue inlet system on the top surface of the inner side of the product, such as a bull-horn gate and a submerged thimble gate, and the glue inlet system can realize automation and simultaneously can not cause the gate residue on the surface of the glue inlet product, thereby ensuring the appearance quality of the product. However, the ox horn gate is only suitable for products with thicker top surface wall thickness, and if the top surface wall thickness is less than 1.2mm, glue lines are easy to appear on the top surface of the product, so that the appearance quality of the product is affected; although the submarine thimble gate does not have the defect of a ox horn gate glue feeding system, after the submarine thimble gate is automatically manufactured, a process of manually removing a thimble glue position is required to be added, and the production cost is increased. As shown in fig. 3 and 4, in the prior art, after the core insert and the core insert are closed, the injection molding machine injects the melted plastic into the runner 9 through the sprue bush 5, and fills the molten plastic into the thimble glue position 4 through the system of the submerged thimble sprue 7, so as to fill the shape of the whole product 3; and after the melted plastic is solidified, separating the fixed die core and the movable die core, separating the product 3, the thimble glue position 4 and the hidden thimble pouring gate 7 in the ejection process of the pouring position thimble 6 and the flow channel thimble 8, separating the hidden thimble pouring gate 7 from the thimble glue position 4, and in the continuous ejection process, ejecting the thimble glue position 4 and the product 3 into a whole and respectively ejecting the hidden thimble pouring gate 7 and the flow channel 9 to finish an injection molding production period. And then, manually shearing the thimble glue position 4 on the product by using a pair of shearing pliers to form the final product.

Above advance gluey system all have certain drawback and limitation when realizing that automated production top surface is thinner and appearance quality requires high plastic product. Therefore, it is an urgent problem to develop a gate glue feeding system with a large curvature.

Disclosure of Invention

In view of this, the utility model aims at providing a thin and the high plastic product of appearance quality requirement of top surface need advance gluey system through the big radian runner and advance gluey structure that realizes automatic disconnected runner in product inside wall in process of production.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a crooked radian runner advances gluey system, is including setting up runner and the runner of setting in movable mould benevolence in the runner cover on the cover die core, runner in the movable mould benevolence includes convex runner and sharp runner, convex runner sets up in the runner mold insert on the movable mould benevolence be equipped with into the runner on the runner mold insert, the radian of convex runner increases the transition to sharp runner from advancing gluey mouthful end gradually, because it is great to advance gluey systematic crookedness, ejecting difficulty, then need strengthen the flexibility of runner, need set up trapezoidal crooked recess on sharp runner in order to strengthen the runner flexibility.

Furthermore, the flow channel in the sprue bush, the straight flow channel and the circular arc flow channel are communicated.

Further, the inlet is rectangular, and the length-width ratio of the rectangular inlet is more than 2.

Furthermore, the cross section of the circular arc-shaped flow channel is rectangular, and the length-width ratio of the circular arc-shaped flow channel is greater than 1.5.

Furthermore, plastic residues are easy to remain in the rectangular shape in the production process, the product yield is affected, and the rectangular closed angle of the arc-shaped flow passage needs to be made into an arc shape.

Furthermore, according to the characteristics of plastic products, the arc radius of the arc-shaped flow channel can be freely designed from the interval of R10-R30mm, and the length of the straight-line flow channel is at least 1.2 times longer than that of the arc-shaped flow channel, so that the smooth ejection of the flow channel is ensured.

Furthermore, a thimble is arranged beside the sprue insert in the movable mould core, and a runner thimble is arranged below the sprue bush in the movable mould core.

Compared with the prior art, crooked radian runner advance gluey system have following advantage: by adopting the technical scheme, the gate of the gate feeding system with the large bending radian is arranged on the inner side wall of the plastic product with the thin top surface and high appearance quality requirement, the product feeding position is not limited by the plastic product with the thin top surface, and automatic production can be realized, so that the production efficiency is improved, the production cost is reduced, the perfect appearance quality requirement of the product can be ensured, and meanwhile, the structure is easy to manufacture, low in failure rate, safe, reliable and convenient to maintain.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic representation of a molded product produced using the present patent, wherein 1-a is a schematic representation of the rear housing structure of the molded product; 1-b is a schematic structural diagram of a front shell of the product;

FIG. 2 is a schematic view of a molded product produced by the present invention at 2-a and a schematic view of a gate with a large curvature at 2-b; 2-c is a cross section of the glue inlet position of the patent;

FIG. 3 is a prior art schematic representation of a mold clamping state of a submerged entry pin gate glue feeding system;

FIG. 4 is a prior art schematic representation of a mold opening state of a submerged entry pin gate glue feeding system;

FIG. 5 is a schematic view of the mold clamping status of the gate glue feeding system with large curvature

Fig. 6 is a diagram of the mold opening state of the large curvature radian gate glue feeding system mold of the utility model.

Description of reference numerals:

1. fixing a mold core; 2. a movable mould core; 3. producing a product; 4. gluing positions of the thimbles; 5. a sprue bush; 6. a glue position thimble; 7. A submerged thimble gate; 8. a flow passage thimble; 9. a flow channel; 10. a linear flow channel; 11. an arc-shaped flow passage; 12. A trapezoidal curved groove; 13. a pouring gate insert; 14. a thimble;

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

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

Fig. 1 is a schematic view of a molded product, which is an electronic fast-dissipating product shell, and has the advantages of uniform appearance, fine and exquisite appearance, no obvious injection molding defects such as scratches, fractures, air holes, burrs, glue deficiency, shrinkage, weld marks, scorching and the like, high dimensional requirement precision and high technical requirements on mold design, manufacture and injection molding production. Because the wall thickness of the top surface of the shell is only 0.8mm, and the wall thickness of the side wall is 2.5mm, in order to ensure the higher appearance requirement of the product, the injection molding production molding needs to be carried out through the large-curvature gate glue feeding system, and the specific figure is 2.

As shown in fig. 5 and 6, a curved arc gate glue inlet system includes a runner 9 disposed in a gate sleeve 5 on a cavity block 1 and a runner disposed in a cavity block 2, where the runner in the cavity block 2 includes an arc runner 11 and a linear runner 10, the arc runner 11 is disposed in a gate insert 13 on the cavity block 2, the gate insert 13 is provided with a gate, the gate is rectangular, an aspect ratio of the rectangular gate is greater than 2, an arc of the arc runner 11 gradually increases from the gate to the linear runner 10, and according to characteristics of a plastic product, an arc radius can be freely designed from an interval of R10 to R30mm, and it is noted that a length of the linear runner is at least 1.2 times greater than a length of the arc runner, so as to ensure smooth ejection of the runner. The cross section of the circular arc-shaped flow channel 11 is rectangular, and the length-width ratio of the circular arc-shaped flow channel is greater than 1.5. In the production process, plastic residues are easy to remain in the rectangular shape, which affects the product yield, and the rectangular closed angle of the circular arc runner 11 needs to be made into a circular arc shape. Because the degree of curvature of the glue inlet system is large, and the ejection is difficult, the flexibility of the flow channel needs to be enhanced, and a trapezoidal curved groove 12 needs to be arranged on the linear flow channel 10 in order to enhance the flexibility of the flow channel. In the ejection process, the automatic disconnection between the large-bending-degree glue feeding system and the plastic product can be realized, and the automatic production is realized. An ejector pin 14 is arranged in the movable die core 2 beside the sprue insert 13, and a flow passage ejector pin 8 is arranged in the movable die core 2 below the sprue bush 5. The gate with large bending radian cannot be directly formed by machining due to large radian, and needs to be spliced and combined to be formed by the gate insert in die machining. And the runner 9 and the linear runner 10 in the sprue bush 5 are communicated with the circular arc runner 11.

The working process of the embodiment is as follows: after the fixed die core 1 and the movable die core 2 are combined, the injection molding machine injects the melted plastic into the runner 9 through the sprue bush 5, and then the whole product shape is filled through the gate system with large bending radian; after the melted plastic is solidified, the fixed die core and the movable die core are separated, the product 3 and the large-curvature inlet gate are directly separated from the product in the ejection process of the ejector pin 14 and the runner ejector pin 8, the large-curvature gate and the product are prevented from being broken when the large-curvature gate and the large-curvature gate are ejected continuously, the trapezoidal groove 12 of the runner with the large-curvature gate is subjected to bending deformation, and finally the product, the large-curvature gate and the runner are ejected respectively, so that an injection molding production period is completed, and full automation is realized.

Through the comparison between the prior art and the technical illustration of the utility model, it can be found that the prior art adopts a hidden thimble gate glue feeding system, the thimble glue position and the product are molded into a whole, although the automatic production is realized, the procedure of manually removing the thimble glue position needs to be added, the production cost is increased, and the yield is lower; the sprue glue feeding system can realize automatic production, reduce the production cost on the basis of improving the product yield and simultaneously ensure the perfect appearance quality requirement of the product.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a system is advanced to gluey in crooked radian runner which characterized in that: the runner structure comprises a runner arranged in a runner sleeve on a fixed die core and a runner arranged in a movable die core, wherein the runner in the movable die core comprises an arc runner and a linear runner, the arc runner is arranged in a runner insert on the movable die core, a gate inlet is arranged on the runner insert, the radian of the arc runner is gradually increased from a glue inlet and transited to the linear runner, and a trapezoidal bent groove is arranged on the linear runner.

2. The gate inlet system for curved arc according to claim 1, wherein: and a thimble is arranged beside the sprue insert in the movable mould core, and a flow passage thimble is arranged below the sprue bush in the movable mould core.

3. The gate inlet system according to claim 1 or 2, wherein: the inlet gate is rectangular, and the length-width ratio of the rectangular inlet gate is more than 2.

4. The gate inlet system according to claim 3, wherein: the cross section of the circular arc-shaped flow channel is rectangular, and the length-width ratio of the circular arc-shaped flow channel is greater than 1.5.

5. The gate inlet system according to claim 3, wherein: and setting the rectangular sharp angle at the adjacent position of the circular arc-shaped flow channel and the glue inlet into a circular arc shape.

6. The gate inlet system for curved arc according to claim 1, wherein: the arc radius of the arc-shaped flow channel is 10-30mm, and the length of the straight flow channel is 1.2 times longer than that of the arc-shaped flow channel.

7. The gate inlet system for curved arc according to claim 1, wherein: and the flow channel in the sprue bush, the linear flow channel and the circular arc flow channel are communicated.