CN217169560U - Spraying-free injection mold of washing machine top cover frame - Google Patents
Spraying-free injection mold of washing machine top cover frame Download PDFInfo
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- CN217169560U CN217169560U CN202220769794.8U CN202220769794U CN217169560U CN 217169560 U CN217169560 U CN 217169560U CN 202220769794 U CN202220769794 U CN 202220769794U CN 217169560 U CN217169560 U CN 217169560U
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Abstract
The utility model discloses a washing machine top cover frame exempt from spraying injection mold, its characterized in that: the feed inlet of the injection mold is positioned on the back surface of the product (1), the feed structure of the injection mold is a latent feed structure, three frames of a rectangular frame of a top cover frame of the washing machine are respectively provided with one latent feed structure, and the other frame is provided with at least two latent feed structures; the feed inlet of the feeding structure of hiding all is located the lower surface department at goods (1) edge, and the feeding structure of hiding includes slider scrap (bridge) feeding structure (2) and crotch runner feeding structure (3). Thus, the defects of flow marks, gas marks and the like on the surface of the product are eliminated, so that the product yield is improved, and the production cost is greatly reduced.
Description
Technical Field
The utility model relates to a technical field of mould, specifically say a spraying injection mold exempts from of washing machine top cover frame.
Background
At present, more and more household appliance exterior decorations and functional parts need to be brightened, and generally, the brightening is realized by spraying paint on a plastic base material. For interior parts, the paint spraying process can realize the surface effects of highlight, matte and the like of interior parts. As for the exterior trimming parts, because of high temperature and ultraviolet irradiation, many plastic materials are difficult to meet the harsh environmental conditions, so that the surface of the exterior trimming parts is painted, and the paint layer plays a role in protecting the plastic base layer so as to realize the use under the conditions of high temperature and ultraviolet. However, the paint spraying process has several problems: firstly, the process flow of the paint spraying process is complex, basic links such as transportation, pretreatment, coating, transportation and the like are required to be added after a blank is injected, and a part of the paint spraying process also requires a plurality of production procedures such as priming paint, finishing paint, UV curing paint and the like, so that the production cost is high. Secondly, each defective part cannot be recycled due to the fact that paint is sprayed on the defective part, and environmental pollution is caused after the defective part is scrapped; thirdly, a large amount of organic solvents exist in the paint, wherein most of the solvents are benzene or toluene aromatic solvents, which cause harm to the bodies of operators and cause problems of environmental pollution and the like. Meanwhile, the painted part also has the following problems: firstly, if the painted part is scratched by a sharp article in the using process, a surface paint layer can fall off to expose a bottom plastic substrate, so that the attractiveness is influenced; secondly, the surface of the painted part is provided with unrecoverable thermosetting paint, so that the product is difficult to meet the recycling requirement; finally, the cost of the finished piece is doubled or even doubled by using the paint, and the production cost is greatly increased.
The low-carbon environment-friendly energy-saving emission reduction is an important direction for the development of the current manufacturing industry, and for household appliance manufacturers, green environment-friendly materials and green environment-friendly processes are considered in the product design stage and the manufacturing stage, so that the method has positive significance for improving the environment friendliness of final products. Meanwhile, as the competition of household electrical appliances is increasingly intense, the price of the household electrical appliances is gradually reduced, but the requirements of customers are gradually increased, so that the cost pressure of part suppliers is great. Aiming at the current situation, the utilization of the spraying-free technology well solves the problems.
In the prior art, the biggest problem of the spraying-free metallic luster injection mold is that the surface of a molded product has defects such as flow marks, air marks and the like, because the phenomena of melt curling and overturning easily occur when plastic melts flow or melt intersection occurs, and the flow marks are easily generated at a thin position with uneven wall thickness. As shown in fig. 1, the top cover frame of the washing machine is a rectangular annular thin-walled product, each side frame is long and narrow, so that the melt flows along a longer path in a mold cavity, pressure loss at a local position is too large, and the appearance defects such as surface flow marks and the like caused by insufficient pressure maintaining during filling need to be secondarily sprayed to meet the appearance requirements of the product. Therefore, the production cost is greatly increased. In addition, the wall thickness of the product is one of the factors for generating air marks on the product, because the wall thickness influences the fluidity of the molten material. Furthermore, defects such as gas marks are easily generated at complicated positions such as product corners and ribs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a defects such as the surface flow trace of elimination goods, gas trace are provided to improve spraying injection mold exempts from of goods qualification rate, greatly reduced manufacturing cost's washing machine top cover frame.
In order to solve the technical problem, the utility model provides a spraying-free injection mold of a washing machine top cover frame, a feed inlet of the injection mold is positioned at the back of a product, a feeding structure of the injection mold is a latent feeding structure, a latent feeding structure is respectively arranged on three frames on a rectangular frame of the washing machine top cover frame, and at least two latent feeding structures are arranged on the other frame; the feed inlet of the feeding structure of hiding all is located the lower surface department at goods edge, and the feeding structure of hiding includes slider scrap (bridge) feeding structure and crotch runner feeding structure.
The washing machine top cover frame comprises a front frame, a left frame, a rear frame and a right frame which are sequentially connected in a closed loop mode, wherein a sliding block lapping feeding structure is arranged on the front frame, three sliding block lapping feeding structures are arranged on the rear frame, and a hook pouring gate feeding structure is respectively arranged on the left frame and the right frame.
The feed inlet of the sliding block scrap edge feeding structure is positioned on the outer side of the product mold cavity, and the feed inlet of the hook sprue feeding structure is positioned on the inner side of the product mold cavity.
The wall thickness of the product die cavity at the corner of the rectangular frame is greater than that of the rest positions of the frame, each frame is formed into a gradually-changed wall thickness gradually thickened from the middle to the two sides, and the wall thickness ratio of the two frames at the connecting corner is 0.95-1.05.
The product die cavity is provided with a plurality of reinforcing ribs arranged in parallel along the length direction on the inner side of the rectangular frame, the reinforcing ribs at the corners of the product are fracture reinforcing ribs, one end of each fracture reinforcing rib is connected with the inner side wall of the frame, and a space is reserved between the other end of each fracture reinforcing rib and the outer side wall of the frame.
After the structure more than adopting, compared with the prior art, the utility model, have following advantage:
1) due to the increase of the number of the feeding gates, the flow stroke of the molten material in the die cavity is shortened, the pressure loss is reduced, and the molten material is ensured to reach all positions of the die cavity, so that the surface flow marks of the product are eliminated, secondary spraying is not needed, and the production cost is greatly reduced;
2) the wall thickness of the product is adjusted, and the wall thickness is gradually changed to replace the uniform wall thickness in the prior art, so that the flow rate of the product is changed in the injection molding process, and the surface flow marks and the gas marks of the product are further eliminated and weakened;
3) the reinforcing ribs at the corner positions of the products are fracture reinforcing ribs, so that the defects of gas marks and the like are further removed.
Drawings
Fig. 1 is a schematic structural diagram of a feeding structure in a spraying-free injection mold of a washing machine top cover frame of the utility model.
Fig. 2 is a schematic diagram of the position structure of the middle slider overlap feeding structure of the present invention.
Fig. 3 is a schematic diagram of the position structure of the middle slider overlap feeding structure of the present invention.
Fig. 4 is a schematic diagram of a position structure of the feeding structure of the middle hook gate of the present invention.
Fig. 5 is a schematic view of a partial structure at a corner of a product according to the present invention.
Wherein: 1. an article of manufacture; 1-1, front frame; 1-2, left frame; 1-3, a rear frame; 1-4, right frame; 2. a slider scrap feeding structure; 3. a hook gate feeding structure; 4. reinforcing ribs; 5. fracture reinforcing ribs; 6. and (4) spacing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1 to 5, the structural schematic diagram of the spraying-free injection mold of the washing machine top cover frame of the present invention is shown, the feed inlet of the injection mold is located at the back of the product 1, the feed structure is a latent feed structure, the rectangular frame of the washing machine top cover frame is respectively provided with a latent feed structure on each of the three frames, and the other frame is provided with at least two latent feed structures; the feed inlet of the feeding structure of hiding all is located the lower surface department at goods 1 edge, and the feeding structure of hiding includes slider scrap (bridge) feeding structure 2 and crotch runner feeding structure 3. In this embodiment, the number of the latent feed structures on one frame where the at least two latent feed structures are provided is three.
The washing machine top cover frame comprises a front frame 1-1, a left frame 1-2, a rear frame 1-3 and a right frame 1-4 which are sequentially connected in a closed loop mode, wherein a sliding block lapping feeding structure 2 is arranged on the front frame 1-1, three sliding block lapping feeding structures are arranged on the rear frame 1-3, and a hook pouring gate feeding structure 3 is respectively arranged on the left frame 1-2 and the right frame 1-4.
The feed inlet of the slide block scrap edge feeding structure 2 is positioned on the outer side of the die cavity of the product 1, and the feed inlet of the hook sprue feeding structure 3 is positioned on the inner side of the die cavity of the product 1.
The wall thickness of the die cavity of the product 1 at the corner of the rectangular frame is greater than that of the rest positions of the frame, each frame is formed into a gradually-changed wall thickness gradually thickened from the middle to the two sides, and the wall thickness ratio of the two frames at the connecting corner is 0.95-1.05.
The die cavity of the product 1 is provided with a plurality of reinforcing ribs 4 which are arranged in parallel along the length direction on the inner side of the rectangular frame, the reinforcing ribs at the corners of the product 1 are fracture reinforcing ribs 5, one end of each fracture reinforcing rib 5 is connected with the inner side wall of the frame, and a space 6 is arranged between the other end of each fracture reinforcing rib and the outer side wall of the frame. Each corner of the rectangular frame is provided with a fracture reinforcing rib, wherein the inner sides of two ends of the front frame are respectively provided with a fracture reinforcing rib which is arranged on the outer side of the front frame at intervals; the inner side of one end of the left frame, which is close to the rear frame, is provided with a fracture reinforcing rib which is arranged at the outer side of the left frame at intervals; the inner side of one end of the right frame, which is close to the rear frame, is provided with a fracture reinforcing rib which is arranged at the outer side of the right frame at intervals.
The above description is only a preferred and feasible embodiment of the present invention, and therefore, the scope of the present invention should not be limited by the above description, and various other modifications made by the technical solutions and concepts of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a washing machine top cover frame exempt from spraying injection mold which characterized in that: the feed inlet of the injection mold is positioned on the back surface of the product (1), the feed structure of the injection mold is a latent feed structure, three frames of a rectangular frame of a top cover frame of the washing machine are respectively provided with one latent feed structure, and the other frame is provided with at least two latent feed structures; the feed inlet of the feeding structure of hiding all is located the lower surface department at goods (1) edge, and the feeding structure of hiding includes slider scrap (bridge) feeding structure (2) and crotch runner feeding structure (3).
2. The spray-free injection mold of a washing machine top cover frame according to claim 1, characterized in that: the washing machine top cover frame comprises a front frame (1-1), a left frame (1-2), a rear frame (1-3) and a right frame (1-4) which are sequentially connected in a closed loop mode, wherein a sliding block overlap feeding structure (2) is arranged on the front frame (1-1), three sliding block overlap feeding structures are arranged on the rear frame (1-3), and hook sprue feeding structures (3) are respectively arranged on the left frame (1-2) and the right frame (1-4).
3. The spray-free injection mold of a washing machine top cover frame according to claim 1, characterized in that: the feed inlet of the sliding block scrap edge feeding structure (2) is positioned on the outer side of the die cavity of the product (1), and the feed inlet of the hook sprue feeding structure (3) is positioned on the inner side of the die cavity of the product (1).
4. The spray-free injection mold of a washing machine top cover frame according to claim 1, characterized in that: the wall thickness of the die cavity of the product (1) at the corners of the rectangular frame is greater than the wall thicknesses of the rest positions of the frame, each frame is formed into a gradually-changed wall thickness gradually thickened from the middle to the two sides, and the wall thickness proportion of the two frames at the connecting corners is 0.95-1.05.
5. The spray-free injection mold of a washing machine top cover frame according to claim 1, characterized in that: the die cavity of the product (1) is provided with a plurality of reinforcing ribs (4) which are arranged in parallel along the length direction on the inner side of the rectangular frame, the reinforcing ribs at the corners of the product (1) are fracture reinforcing ribs (5), one end of each fracture reinforcing rib (5) is connected with the inner side wall of the frame, and a space (6) is arranged between the other end of each fracture reinforcing rib and the outer side wall of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220769794.8U CN217169560U (en) | 2022-04-01 | 2022-04-01 | Spraying-free injection mold of washing machine top cover frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220769794.8U CN217169560U (en) | 2022-04-01 | 2022-04-01 | Spraying-free injection mold of washing machine top cover frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217169560U true CN217169560U (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220769794.8U Active CN217169560U (en) | 2022-04-01 | 2022-04-01 | Spraying-free injection mold of washing machine top cover frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217169560U (en) |
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2022
- 2022-04-01 CN CN202220769794.8U patent/CN217169560U/en active Active
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