CN218599439U

CN218599439U - Injection molding, domestic appliance and mould

Info

Publication number: CN218599439U
Application number: CN202222893209.8U
Authority: CN
Inventors: 刘仲才
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-10
Anticipated expiration: 2032-10-31

Abstract

The application relates to the technical field of household appliances, and provides an injection molding piece, a household appliance and a mold, wherein the injection molding piece comprises an appearance plate and a first reinforcing rib, one of two side surfaces of the appearance plate along the thickness direction of the appearance plate is a first appearance surface, the other of the two side surfaces of the appearance plate along the thickness direction of the appearance plate is a first non-appearance surface, and the first reinforcing rib is connected to the first non-appearance surface; the appearance plate is of a straight structure, and an included angle between the first reinforcing rib and a straight line extending along the length direction of the appearance plate is a preset angle; or the appearance board is of a circular ring structure, and an included angle between the first reinforcing rib and a tangent line passing through the end part of the first reinforcing rib is a preset angle; wherein the preset angle is greater than 0 deg. Because the first reinforcing rib is designed into a preset angle, the first appearance surface can be prevented from being frequently impacted due to melt backflow of the first reinforcing rib to a certain extent during injection molding, and flow marks of the first appearance surface are reduced.

Description

Injection molding, domestic appliance and mould

Technical Field

The application relates to the technical field of household appliances, in particular to an injection molding piece, a household appliance and a mold.

Background

Household appliances are configured with injection molded parts, which are injection molded in a molding process. In the related art, the surface of the injection molding part is easy to generate flow marks, and the flow marks make the appearance quality of the injection molding part difficult to meet the appearance requirement, so that the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an injection molded part, a home appliance, and a mold capable of reducing flow mark defects.

To achieve the above object, one aspect of the present application provides an injection molded part, comprising:

one of two side surfaces of the appearance board along the thickness direction is a first appearance surface, and the other of the two side surfaces of the appearance board along the thickness direction is a first non-appearance surface;

a first reinforcing rib connected to the first non-exterior surface;

the appearance board is of a straight structure, and an included angle between the first reinforcing rib and a straight line extending along the length direction of the appearance board is a preset angle; or the appearance plate is of a circular ring structure, and an included angle between the first reinforcing rib and a tangent line passing through the end part of the first reinforcing rib is a preset angle; wherein the preset angle is greater than 0 °.

In some embodiments, the predetermined angle is between 30 ° and 60 °.

In some embodiments, the injection molded part comprises a second reinforcing bead attached to the first non-cosmetic surface;

the appearance board is of the straight structure, and an included angle between the second reinforcing rib and a straight line extending along the length direction of the appearance board is 90 degrees; or, the appearance board is of the annular structure, and the second reinforcing ribs extend along the radial direction of the appearance board.

In some embodiments, at least one end of the first reinforcing bead is connected to the second reinforcing bead.

In some embodiments, the maximum thickness of the first reinforcing rib is smaller than the thickness of the outer panel.

In some embodiments, the thickness of the appearance plate is between 2.0mm and 3.0 mm; and/or the presence of a gas in the atmosphere,

the thickness of the first reinforcing rib is 0.5 mm-2.0 mm.

The embodiment of the application also provides a household appliance comprising the injection molding part.

Another aspect of the present embodiment provides a mold, including a mold core, the mold core includes:

an appearance board cavity;

the first reinforcing rib cavity is communicated with one end of the appearance plate cavity in the thickness direction;

the appearance plate cavity is of a straight structure, and an included angle between the first reinforcing rib cavity and a straight line extending along the length direction of the appearance plate cavity is a preset angle; or the appearance plate cavity is of a circular ring structure, and an included angle between the first reinforcing rib cavity and a tangent line passing through the end part of the first reinforcing rib cavity is a preset angle; wherein the preset angle is greater than 0 °.

In some embodiments, the predetermined angle is between 30 ° and 60 °.

In some embodiments, the mold core includes a second rib cavity, the second rib cavity being in communication with a side of the appearance plate cavity where the first rib cavity is located;

the appearance plate cavity is of the straight structure, and an included angle between the second reinforcing rib cavity and a straight line extending along the length direction of the appearance plate cavity is 90 degrees; or the appearance plate cavity is of the circular ring-shaped structure, and the second reinforcing rib cavity extends along the radial direction of the appearance plate cavity.

In some embodiments, at least one end of the first bead cavity is in communication with the second bead cavity.

In some embodiments, the maximum thickness of the first stiffener cavity is less than the thickness of the look-out plate cavity.

In some embodiments, the thickness of the appearance plate cavity is between 2.0mm and 3.0 mm; and/or the presence of a gas in the atmosphere,

the thickness of the first reinforcing rib cavity is between 0.5mm and 2.0 mm.

The injection molding of this application embodiment, first strengthening rib are used for increasing the structural strength of appearance board, because first strengthening rib designs into preset angle, when injection moulding, can avoid forming the fuse-element backward flow of first strengthening rib to a certain extent and cause and frequently strike first outward appearance face, guarantee the stability of the flow field of the crossing department of appearance board and first strengthening rib to reduce the flow mark of first outward appearance face.

Drawings

FIG. 1 is a schematic view of a first injection molded part according to an embodiment of the present disclosure, wherein the injection molded part is a door outer ring having a circular ring structure;

FIG. 2 is a schematic view of the injection molded part of FIG. 1 from another perspective;

FIG. 3 is an enlarged, fragmentary schematic view of the injection molded part of FIG. 2;

FIG. 4 is a schematic view of a second injection molded part according to an embodiment of the present application, wherein the injection molded part is a decorative handle having a straight plate structure;

FIG. 5 is a schematic view of the injection molded part of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the injection molded part of FIG. 4 from a further perspective;

FIG. 7 is a schematic view showing the flow of the melt in the appearance cavity of the related art when it meets the rib structure cavity, wherein the dashed curved arrows schematically show the flow direction of the backflow melt in the rib structure cavity, and the straight arrows schematically show the overall flow direction of the melt in the appearance cavity;

FIG. 8 is a schematic view of the appearance plate cavity and the first bead cavities in an embodiment of the present application, wherein the straight arrows schematically show the bulk flow direction of the melt in the appearance plate cavities;

FIG. 9 is a schematic view of the appearance plate cavity and the second bead cavity in an embodiment of the present application, wherein the straight arrows schematically show the bulk flow direction of the melt in the appearance plate cavity.

Description of the reference numerals

An appearance board 10; a first exterior surface 10a; a first non-exterior surface 10b; a first reinforcing rib 20; second reinforcing ribs 30; side edges 40; the gate portion 41; a material blocking portion 42;

an annular outer edge 1;

a straight outer edge 2;

an exterior panel cavity 100; a first rib cavity 200; a second bead cavity 300;

an appearance cavity 1000; rib position structure cavity 2000;

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the present embodiment, the "length direction", "width direction" and "thickness direction" orientations or positional relationships of the appearance plate 10 are based on the orientations or positional relationships shown in fig. 4 to 6, and it is to be understood that these orientation terms are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. The present application will be described in further detail with reference to the following drawings and specific embodiments.

Domestic appliance is configured with the injection molding, in order to improve domestic appliance's impression, domestic appliance possesses gorgeous metal appearance effect usually, and the injection molding adopts the plastics material, in order to make the injection molding can possess gorgeous metal appearance effect, in the correlation technique, injection molding manufacturing process is mostly moulding plastics + spraying process, surface spraying metal powder at injection moulding's injection molding promptly, the injection molding after the spraying possesses gorgeous metal appearance effect, but spraying process exists and pollutes greatly, with high costs, the qualification rate is low and scrap back shortcoming such as can not be retrieved, seriously influence environment and production personnel's health, be not conform to the concept of green manufacturing.

In order to solve the defects of the spraying process, the spraying-free thermoplastic engineering plastic is produced at the same time, and the spraying-free injection molding can give the metal appearance effect to the product, so that the spraying process is cancelled, and the discharge of pollutants in the spraying process is avoided. However, no matter the spray injection molding process or the spray-free injection molding process, flow marks are easy to occur, especially under the condition that the spray-free injection molding part contains metal powder and the injection molding part has a rib structure and the like, due to the fact that the rib structure cavity is obstructed in the injection molding process, the metal powder is unevenly distributed, light scattering occurs to the produced injection molding part product under the irradiation of light, the flow marks are formed visually, and the flow mark defect is caused to the product, so that the appearance quality of the injection molding part cannot meet the production requirements, the yield is low, the production material waste is caused, the production cost is high, and the use experience of a user is influenced. Because the injection molding inevitably has the rib position structure, and the rib position structure leads to the outward appearance to produce the flow mark easily, consequently, the injection molding that has the rib position structure adopts spraying-free injection molding process seldom.

The embodiment of the application provides an injection molding, domestic appliance and mould, can reduce the flow mark defect, explains injection molding, domestic appliance and the mould of this application in detail below.

The injection molding that this application embodiment provided can be for exempting from spraying integrative injection moulding spare.

The injection-molded parts according to the embodiments of the present application are produced, for example, by injection molding a melt consisting of a matrix containing metal powder. It will be appreciated that the melt may also be used with a matrix that does not contain metal powder.

The following description will be given taking as an example the case where a melt composed of a matrix containing metal powder is injection-molded to form an injection-molded article.

The type of the metal powder is not limited, and exemplary metal powders include, but are not limited to, copper, silver, aluminum, and the like.

The metal powder means that the metal is in a granular form. The size of the particles is not limited in this application.

The type of matrix is not limited, and exemplary matrices include, but are not limited to, resins, and the like.

Referring to fig. 1 to 6, an injection-molded article according to an embodiment of the present invention includes a exterior panel 10 and a first reinforcing rib 20, one of two side surfaces of the exterior panel 10 in a thickness direction thereof is a first exterior surface 10a, and the other of the two side surfaces of the exterior panel 10 in the thickness direction thereof is a first non-exterior surface 10b. The first design surface 10a is a visual display surface and the first non-design surface is not a visual display surface. In a state where the injection molded part is assembled to the home appliance, the user can visually see the first exterior surface 10a and cannot see the first non-exterior surface 10b.

Referring to fig. 2 and 5, the first reinforcing ribs 20 are connected to the first non-exterior surface 10b. As such, the first reinforcing bead 20 is not visible to a user in a state where the injection molded part is assembled to the home appliance.

Referring to fig. 5, the appearance plate 10 has a straight structure, and an included angle between the first reinforcing rib 20 and a straight line extending along a length direction of the appearance plate 10 is a predetermined angle α, where the predetermined angle α is greater than 0 °. That is, the projection of the first reinforcing bead 20 on the exterior panel 10 intersects with a straight line extending in the lengthwise direction of the exterior panel 10. In other words, the projection of the first reinforcing bead 20 on the exterior panel 10 is not parallel to a straight line extending in the lengthwise direction of the exterior panel 10. It should be noted that, during the injection molding process, the length direction of the appearance plate 10 is the overall flow direction of the melt forming the appearance plate 10 with a straight structure.

Referring to fig. 2, the appearance plate 10 has a circular ring structure, and an included angle between the first reinforcing rib 20 and a tangent line passing through an end portion of the first reinforcing rib 20 is a predetermined angle α, wherein the predetermined angle α is greater than 0 °. The tangent line is a tangent line of a concentric circle which takes the center of the appearance plate 10 with a circular ring structure as a center and passes through the end part of the first reinforcing rib 20. That is, the projection of the first reinforcing bead 20 on the exterior panel 10 intersects the tangent line. In other words, the projection of the first reinforcing bead 20 on the exterior panel 10 is not parallel to the tangent line. It should be noted that, during the injection molding process, the circumferential direction of the design plate 10 is the overall flow direction of the design plate 10 forming the circular ring structure, and the tangent line passing through the end of the first rib 20 is the actual flow direction of the melt at the end of the first rib 20.

The injection molding piece provided by the embodiment of the application comprises the appearance board 10 and the first reinforcing rib 20, and the appearance board 10 is easily obstructed by the first reinforcing rib 20 in the injection molding process. In order to clearly illustrate the injection molded part provided by the embodiment of the present application, a mold provided by the embodiment of the present application is described first, and the mold can be used for injection molding the injection molded part provided by the embodiment of the present application.

Referring to fig. 8, the mold according to the embodiment of the present disclosure includes a mold core, the mold core includes an appearance plate cavity 100 and a first rib cavity 200, and the first rib cavity 200 is communicated with one end of the appearance plate cavity 100 in the thickness direction. The appearance plate cavity 100 is used to injection mold the appearance plate 10. The first bead cavity 200 is used to injection mold the first bead 20. The melt in the appearance plate cavity 100 can enter and fill the first bead cavity 200.

The appearance plate cavity 100 is of a straight structure, and an included angle between the first reinforcing rib cavity 200 and a straight line extending along the length direction of the appearance plate cavity 100 is a preset angle alpha, wherein the preset angle alpha is greater than 0 deg. That is, the projection of the first bead cavities 200 on the exterior panel cavity 100 intersects with a straight line extending in the lengthwise direction of the exterior panel cavity 100. In other words, the projection of the first bead cavities 200 on the exterior panel cavity 100 is not parallel to a straight line extending along the length of the exterior panel cavity 100. It should be noted that, during the injection molding process, the whole melt in the design plate type cavity 100 flows along the length direction of the design plate type cavity 100.

The appearance plate cavity 100 is a circular ring-shaped structure, and an included angle between the first reinforcing rib cavity 200 and a tangent line passing through the end part of the first reinforcing rib cavity 200 is a preset angle α, wherein the preset angle α is greater than 0 °. The tangent line is a tangent line of a concentric circle passing through the end of the first rib 20 with the center of the exterior plate type cavity 100 having a circular ring structure as a center. That is, the projection of the first bead cavity 200 on the exterior panel cavity 100 intersects the tangent line. In other words, the projection of the first rib cavity 200 onto the appearance plate cavity 100 is not parallel to the tangent line. It should be noted that, during the injection molding process, the whole melt in the exterior plate type cavity 100 flows along the circumferential direction of the exterior plate type cavity 100, and the tangent line passing through the end of the first rib cavity 200 is the actual flow direction of the melt at the end of the first rib cavity 200.

The specific analysis of the cause of the flow mark is as follows:

referring to fig. 7, during the melt flowing process, the hotter melt contacts the cooler mold core during the flowing process, and the hotter melt is rapidly frozen on the cavity wall surface of the mold cavity to form a thinner solidified layer. The orientation of the metal powder in the solidified layer determines the quality of the appearance of the injection molding piece, and the metal powder which flows stably can form consistent metal powder orientation to obtain better appearance. When the melt in the appearance cavity 1000 flows through the rib structure cavity 2000, the flow direction of the melt in the appearance cavity 1000 is divided into two parts, one part of the melt continues to flow along the original flow direction, the other part of the melt flows to the rib structure cavity 2000, if the rib structure cavity 2000 is parallel to the overall flow direction of the melt in the appearance cavity 1000, the melt in the appearance cavity 1000 continuously enters the rib structure cavity 2000, and the melt in the rib structure cavity 2000 easily reflows to the appearance cavity 1000, so that the melt reflows to the appearance cavity 1000 from the rib structure cavity 2000 to cause frequent impact on the appearance surface (see fig. 7), and when the subsequent melt continuously flows, an unstable flow field is easily formed in the area where the rib structure of the appearance cavity 1000 is located, and under the continuous action of the fluid pressure, the solidified layer of the appearance surface where the rib structure cavity 2000 of the appearance cavity 1000 is located is damaged, so that the metal powder orientation of the solidified layer of the appearance surface is disordered and appears as a flow mark. That is, the rib structure parallel to the melt flow direction is likely to cause flow marks on the appearance surface.

The appearance structure is a structure having an appearance surface. The design cavity 1000 is a cavity having a design structure with a design surface. For example, in the present application, the appearance board is an appearance structure, and the appearance board type cavity 100 is an appearance cavity 1000. The first reinforcing rib is in a rib position structure, and the first reinforcing rib cavity 200 is in a rib position structure cavity 2000.

The principle of reducing the flow mark of the application is specifically explained as follows:

the application discovers that: when the flow direction of the melt in rib position structure cavity 2000 and appearance cavity 1000 is not parallel, the melt in appearance cavity 1000 can flow through rib position structure cavity 2000 relatively quickly, so that the melt in rib position structure cavity 2000 is prevented from flowing back to appearance cavity 1000 to a certain extent, and flow marks are reduced.

The mold provided by the embodiment of the application, the mold core can be used for injection molding of injection molding parts, the included angle between the flow directions of the melt in the first reinforcing rib cavity 200 and the appearance plate type cavity 100 is a preset angle alpha larger than 0 degrees, when injection molding is performed, the melt in the appearance plate type cavity 100 can flow through the first reinforcing rib cavity 200 relatively quickly, the probability that the melt of the first reinforcing rib cavity 200 frequently impacts the appearance plate type cavity 100 can be reduced to a certain extent, the melt of the first reinforcing rib cavity 200 is prevented from flowing back to the appearance plate type cavity 100 to a certain extent, the stability of the flow field at the intersection of the appearance plate type cavity 100 and the first reinforcing rib cavity 200 is ensured, and therefore the flow mark of the first appearance surface 10a is reduced.

The injection molding of this application embodiment, first strengthening rib 20 is used for increasing the structural strength of outward appearance board 10, because first strengthening rib 20 designs into predetermineeing angle alpha, when injection moulding, can avoid forming the fuse-element backward flow of first strengthening rib 20 to a certain extent and cause and frequently strike first outward appearance face 10a, guarantees the stability of the flow field of the crossing department of outward appearance board 10 and first strengthening rib 20 to reduce the flow mark of first outward appearance face 10a.

The application finds that: in order to better avoid frequent impact of melt backflow in the rib structure cavity 2000 on the appearance cavity 1000, the included angle between the rib structure cavity 2000 and the flow direction of the melt is required to be 30-60 degrees, in this case, in the continuous flow process of the melt in the appearance cavity 1000, the melt can rapidly flow through the rib structure cavity 2000, and at the moment, the influence on the appearance of the product, such as the first appearance surface 10a, is small when the melt flows through the rib structure, so that the product with good appearance can be manufactured only when the preset angle α between the rib structure, such as the first reinforcing rib 20, and the flow direction of the melt is 30-60 degrees.

In an embodiment, referring to fig. 2, 5 and 8, the predetermined angle α is between 30 ° and 60 °. Illustratively, the preset angle α is 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, or 60 °, etc.

The application finds that: when the rib structure cavity 2000 is perpendicular to the flow direction of the melt, the melt flows through the rib structure cavity 2000 rapidly, the melt in the rib structure cavity 2000 basically does not flow back and frequently impacts the appearance cavity 1000, and the rib structure basically has no influence on the first appearance surface 10a.

In one embodiment, referring to fig. 2 and 5, the injection molded part includes a second rib 30 attached to the first non-exterior surface 10b.

Referring to fig. 5, the appearance plate 10 has a straight structure, and an included angle between the second reinforcing ribs 30 and a straight line extending along the length direction of the appearance plate 10 is 90 °. That is, the projection of the second reinforcing rib 30 on the exterior panel 10 is perpendicular to a straight line extending in the longitudinal direction of the exterior panel 10.

Referring to fig. 2, the appearance plate 10 is a circular ring structure, and the second ribs 30 extend along a radial direction of the appearance plate 10. That is, the projection of the second reinforcing bead 30 on the exterior panel 10 is perpendicular to a tangent line passing through the end of the second reinforcing bead 30.

In the present embodiment, the second reinforcing ribs 30 not only can reinforce the structural strength of the exterior panel 10, but also have substantially no influence on the first exterior surface 10a.

In terms of a mold, in an embodiment, referring to fig. 9, the mold core includes a second rib cavity 300, and the second rib cavity 300 is communicated with a side of the appearance plate type cavity 100 where the first rib cavity 200 is located. The second bead cavity 300 is used to injection mold the second bead 30. The first bead cavities 200 and the second bead cavities 300 are communicated with the same side in the thickness direction of the exterior plate type cavity 100.

The appearance plate cavity 100 is of a straight structure, and an included angle between the second reinforcing rib cavity 300 and a straight line extending along the length direction of the appearance plate cavity 100 is 90 degrees. That is, the projection of the second bead cavities 300 on the exterior panel cavity 100 is perpendicular to a straight line extending in the lengthwise direction of the exterior panel cavity 100. In this way, the second bead cavities 300 are perpendicular to the actual flow direction of the melt in the exterior plate type cavity 100 flowing through the second bead cavities 300, and therefore, the melt in the exterior plate type cavity 100 rapidly flows through the second bead cavities 300, the melt in the second bead cavities 300 does not substantially flow back and impact the exterior plate type cavity 100, and the second bead cavities 300 have substantially no influence on the first exterior surface 10a.

The appearance plate cavity 100 has a circular ring structure, and the second rib cavities 300 extend in the radial direction of the appearance plate cavity 100. That is, the projection of the second bead cavity 300 on the appearance plate cavity 100 is perpendicular to the tangent line passing through the end of the second bead cavity 300. In this way, the second bead cavities 300 are perpendicular to the actual flow direction of the melt in the exterior plate type cavity 100 flowing through the second bead cavities 300, and therefore, the melt in the exterior plate type cavity 100 rapidly flows through the second bead cavities 300, the melt in the second bead cavities 300 does not substantially flow back and impact the exterior plate type cavity 100, and the second bead cavities 300 have substantially no influence on the first exterior surface 10a.

In one embodiment, referring to fig. 2 and 5, at least one end portion of the first reinforcing bead 20 is connected to the second reinforcing bead 30. In terms of the mold, in one embodiment, at least one end of the first bead cavity 200 communicates with the second bead cavity 300. So, connect between first strengthening rib 20 and the second strengthening rib 30 to further improve the structural strength of injection molding, the atress ability of injection molding is better.

For example, in some embodiments, referring to fig. 2 and 5, the number of the second reinforcing ribs 30 is multiple, and the first reinforcing rib 20 connects two adjacent second reinforcing ribs 30. In terms of the mold, in one embodiment, there are a plurality of second bead cavities 300, and the first bead cavities 200 communicate with two adjacent second bead cavities 300.

In the embodiments of the present application, the plurality includes two and more than two.

In one embodiment, the maximum thickness of the first reinforcing bead 20 is less than the thickness of the appearance panel 10. In terms of a mold, in one embodiment, the maximum thickness of the first bead cavities 200 is less than the thickness of the appearance plate cavities 100. Since the flow resistance of the melt in the cavity having a larger thickness is smaller than that in the cavity having a smaller thickness, the flow rate of the melt in the cavity having a larger thickness is faster than that in the cavity having a smaller thickness. The thickness of the appearance plate 10 is greater than the maximum thickness of the first stiffener 20, on one hand, the melt in the appearance plate type cavity 100 can rapidly enter and fill the first stiffener cavity 200, the melt in the first stiffener cavity 200 is rapidly frozen, and the melt in the first stiffener cavity 200 is prevented from reflowing; on the other hand, in the continuous flow of the subsequent melt in the appearance plate cavity 100, the flow rate of the melt in the appearance plate cavity 100 is relatively fast, and the melt in the appearance plate cavity 100 can rapidly flow through the first reinforcing rib cavity 200; in this way, flow marks on the first design surface 10a are further reduced.

In some embodiments, the appearance plate 10 may be of a uniform thickness structure, that is, the thickness of the appearance plate 10 is uniform at any position. Thus, the structural strength of the appearance plate 10 at any position is equal, and the stress capacity is balanced.

In one embodiment, the thickness of the appearance plate 10 is between 2.0mm and 3.0 mm. Illustratively, the thickness of the appearance panel 10 is 2.0mm, 2.1mm, 2.3mm, 2.5mm, 2.8mm, or 3.0mm, etc. Thus, the appearance board 10 has a moderate thickness, and the appearance board 10 has good structural strength and is not easy to deform.

In terms of a mold, in one embodiment, the apparent plate shape cavity 100 has a thickness between 2.0mm and 3.0 mm. Illustratively, the apparent plate type cavity 100 has a thickness of 2.0mm, 2.1mm, 2.3mm, 2.5mm, 2.8mm, or 3.0mm, etc. In this way, the melt can fill the design edge cavity for a suitable length of time and quickly freeze to form a solidified layer.

In one embodiment, the thickness of the first ribs 20 is between 0.5mm and 2.0 mm. Illustratively, the thickness of the first reinforcing bead 20 is 0.5mm, 1.0mm, 1.5mm, or 2.0mm, etc. Thus, the first reinforcing rib 20 has a moderate thickness and a good structural strength, and can effectively enhance the structural strength of the exterior panel 10.

In terms of the mold, in one embodiment, the thickness of the first bead cavities 200 is between 0.5mm and 2.0 mm. Illustratively, the thickness of the first bead cavities 200 is 0.5mm, 1.0mm, 1.5mm, or 2.0mm, among others. In this way, the melt can quickly fill the first bead cavities 200 and quickly freeze to form the first beads, thereby preventing backflow of the melt in the first bead cavities 200.

In one embodiment, referring to fig. 1 to 6, the injection-molded part includes a side 40, the side 40 is connected to an end of the appearance plate 10, one side of the side 40 in a thickness direction thereof is configured with a gate forming region corresponding to a gate of a mold, and the thickness of the side 40 is smaller than that of the appearance plate 10. Side 40 is a non-appearance structure, i.e., side 40 is a non-visual display structure. In the state in which the injection-molded part is assembled to the household appliance, the side 40 is not visible to the user.

In terms of the mold, in one embodiment, the mold core includes a gate and a side cavity, the side cavity is communicated with the end of the exterior plate cavity 100, one side of the side cavity along the thickness direction thereof is communicated with the gate, and the thickness of the side cavity is smaller than that of the exterior plate cavity 100. The side cavity is used to injection mold the side 40.

The sprue is used for injecting melt into the mold core. The melt enters the side cavity and the exterior plate type cavity 100 through the gate, and the melt in the exterior plate type cavity 100 enters the first rib cavity 200 and the second rib cavity 300. On the one hand, since the side edge 40 is of a non-exterior structure, the gate is communicated with the side edge cavity, and the gate forming region is formed on the side edge 40, the first exterior surface 10a is not affected. On the other hand, because the melt flows faster in the cavity with relatively large thickness than in the cavity with relatively small thickness and flows easily from the cavity with relatively large thickness to the cavity with relatively small thickness, and the thickness of the appearance plate type cavity 100 is relatively large, the melt fills the appearance plate type cavity 100 first and then continuously flows along with the melt to fill the side cavity, so that substances such as gas and impurities in the appearance plate type cavity 100 can be driven to the side cavity, and the appearance effect of the first appearance surface 10a is further improved.

It can be understood that, after the injection molding blank is injection molded by using the mold of the embodiment of the present application and is demolded, a residual part of the melt at the gate may be on the injection molding blank and form a gate forming portion, where the gate forming portion is located. The injection molded blank may be reprocessed to cut off or partially cut off the gate forming portion, and of course, the gate forming portion of the injection molded blank may be left unprocessed, that is, the gate forming portion is reserved in the gate forming area, which is not specifically limited, and may be set according to the actual needs of production.

It should be noted that the non-appearance structure refers to a structure that is not used for visual display. Non-cosmetic cavity 1000 refers to a cavity that forms a non-cosmetic structure.

In an exemplary embodiment, referring to fig. 4 and 6, the appearance board 10 is a straight structure, the side edge 40 may extend along the length direction of the appearance board 10, and the side edge 40 is connected to one end of the appearance board 10 in the width direction. As for the mold, in one embodiment, the side cavities extend in the lengthwise direction of the exterior plate 10, and the side cavities communicate with one end portion in the widthwise direction of the exterior plate type cavity 100.

Illustratively, the side edge 40 is bent from one end portion in the width direction of the exterior panel 10 toward a position away from the first exterior surface 10a. As for the mold, in an embodiment, the side cavity is bent from one end portion in the width direction of the exterior plate type cavity 100 in the thickness direction of the exterior plate type cavity 100. The side edges 40 can increase the rigidity of the exterior panel 10. Here, since the side edge 40 is located at one end portion in the width direction of the exterior panel 10, it is necessary to secure the connection strength between the side edge 40 and the exterior panel 10, and the projection shape of the side edge 40 and the exterior panel 10 is substantially L-shaped with a plane perpendicular to the longitudinal direction of the exterior panel 10 as a projection plane, and therefore, the local portion of the connection between the side edge 40 and the exterior panel 10 is not suitable for the thinning process, that is, the thickness of the local portion of the connection between the side edge 40 and the exterior panel 10 cannot be reduced. Since the melt is likely to flow from the cavity having a relatively large thickness to the cavity having a relatively small thickness, the thickness of the design plate 10 is equal to or greater than the thickness of the side edge 40, and the melt forming the side edge 40 is prevented from flowing back, thereby reducing the influence on the first design surface 10a.

In an exemplary embodiment, referring to fig. 1 and 2, the appearance plate 10 is a circular ring structure, and the side edge 40 is connected to one end of the appearance plate 10 in the radial direction. In terms of the mold, in one embodiment, the side cavity communicates with one end portion of the exterior plate type cavity 100 in the radial direction.

In one embodiment, the side edges 40 may surround the inner perimeter of the exterior panel 10. The side edges 40 can increase the rigidity of the exterior panel 10. Here, the thickness direction of the side edge 40 coincides with the thickness direction of the exterior panel 10. With respect to the mold, in one embodiment, the side cavity surrounds the inner periphery of the exterior panel cavity 100.

In one embodiment, the number of the gates is multiple, the multiple gates are arranged at intervals along the flowing direction of the melt in the cavity 100 of the viewing plate, and the multiple gates are opened sequentially according to a preset time interval. The number of the gate forming areas is multiple, and the gate forming areas correspond to the gates one by one. For example, the appearance plate 10 has a flat structure, and a plurality of gate forming regions are provided at intervals along the length direction of the appearance plate 10. For another example, the exterior plate 10 has a circular ring-shaped structure, and a plurality of gate forming regions are provided at intervals in the circumferential direction of the exterior plate 10. The plurality of gates do not open glue injection at the same time, but have a sequence. For example, taking three gates as an example, the three gates are respectively defined as a gate one, a gate two and a gate three according to the length direction, and during the injection molding process, the gate one may be opened first, then the gate two is opened, and finally the gate three is opened. On the one hand, a plurality of gates are adopted, so that the problem that the injection molded part is too large in size and a single gate is difficult to fill the appearance plate cavity 100 quickly is avoided. On the other hand, a plurality of runners are opened in proper order along its length direction according to preset time interval and can guarantee that the fuse-element flows unidirectionally, avoids appearing unstable flow field.

It should be noted that the specific duration of the preset time interval may be set according to actual production requirements, and the application is not limited thereto.

The embodiment of the application also provides a household appliance, and the household appliance comprises the injection molding part in any embodiment of the application.

The embodiment of the application provides a household appliance, injection molding structural strength is good and manufacturing cost is lower relatively, can satisfy outward appearance and dual requirement of function.

The specific type of the home appliance is not limited, and for example, the home appliance may be a laundry treatment apparatus, and the laundry treatment apparatus may be a washing machine, a dryer, or a washer-dryer.

Classified in the manner of treating laundry, laundry treatment devices include, but are not limited to, pulsator devices, agitator devices, or drum type devices, etc. For example, the laundry treating apparatus may be a pulsator type washing machine, a drum type washing machine, an agitator type washing machine, a drum type dryer, or the like.

The injection molded part may be a door outer ring or a decorative handle of the laundry treating apparatus, or the like. The injection molded part of the present application is further described below by taking a door outer ring and a decorative handle as examples.

In an example, taking an injection molded part as an outer door ring as an example, the outer door ring can be a structural part forming a door body.

The appearance plate 10 of the door outer ring is of a circular ring structure.

In one embodiment, referring to fig. 1 and 2, the door outer ring includes an annular design edge 1, the annular design edge 1 surrounds the periphery of the side edge 40, and the thickness of the end of the annular design edge 1 near the side edge 40 is greater than the thickness of the end of the side edge 40 near the annular design edge 1. The annular design edge 1 is a design structure, and the surface of the annular design edge 1 away from the side edge 40 is a second design surface.

For the mold, the mold core includes an annular design edge cavity surrounding and communicating with the periphery of the side cavity. The thickness of one end of the annular appearance side cavity close to the side edge cavity is larger than that of one end of the side edge cavity close to the annular appearance side cavity.

In this embodiment, at the juncture of the side cavity and the annular appearance side cavity, because the thickness of the side cavity is smaller, a certain flow choking effect is achieved, the probability of bidirectional flow of the melt between the side cavity and the annular appearance side cavity is reduced, a stable flow field is easier to form, the possibility that the melt in the side cavity impacts a solidified layer of the annular appearance side cavity is reduced, the probability of flow marks is reduced, and the yield of injection molded parts is improved.

In the second example, the injection molding piece is taken as the decorative handle.

The appearance panel 10 of the ornamental handle is of a flat configuration.

The laundry treating apparatus may include a first treating device including a first casing and a second treating device including a second casing, the first treating device and the second treating device being stacked, the decorative handle being located between the first treating device and the second treating device, a first gap being formed between the first casing and the second casing, the appearance plate 10 closing the first gap. In this way, good appearance consistency can be exhibited among the appearance plate 10, the first housing, and the second housing. The ornamental handle may be used to decorate the first and second housing attachment locations.

For example, the first housing and the second housing may be made of metal. For example, the first casing and the second casing may be made of metal material with the same color or different color from the metal powder of the decorative handle. Therefore, the first shell and the second shell not only have gorgeous metal appearance effect, but also have better structural strength.

In some embodiments, one of the first and second treatment devices is a washing machine and the other of the first and second treatment devices is a dryer. Thus, the laundry treating apparatus can provide both a washing function and a drying function. Further, one of the first and second treating devices is a tumble washer, and the other of the first and second treating devices is a tumble dryer.

In one embodiment, referring to fig. 4 to 6, the decorative handle includes a straight appearance edge 2, the appearance plate 10 is provided with the straight appearance edge 2 along at least one side of the length direction thereof, the straight appearance edge 2 is bent from the end of the length direction of the appearance plate 10 to a direction away from the first appearance surface 10a, and the thickness of the straight appearance edge 2 is not greater than the thickness of the appearance plate 10. The surface of the straight appearance edge 2 far away from the appearance board 10 is a third appearance surface. For example, one side of the appearance plate 10 in the longitudinal direction thereof is provided with a straight appearance side 2 so that the third appearance side is one. For another example, the two sides of the appearance plate 10 in the longitudinal direction thereof are provided with straight appearance edges 2, so that there are two third appearance surfaces.

In terms of the mold, in one embodiment, the mold core includes a straight design edge cavity, the design plate cavity 100 is provided with a straight design edge cavity along at least one side of the length direction thereof, the straight design edge cavity is communicated with the end of the length direction of the design plate cavity 100, the straight design edge cavity is located on one side of the thickness direction of the design plate cavity 100, and the thickness of the straight design edge cavity is not greater than the thickness of the design plate cavity 100.

In this embodiment, the straight design edge cavity is located at the end of the appearance plate cavity 100 along the length direction thereof, and the thickness of the straight design edge cavity is not greater than the thickness of the appearance plate cavity 100, so that the melt of the appearance plate cavity 100 flows into the straight design edge cavity in a unidirectional manner, and the straight design edge cavity does not substantially affect the first design surface 10a.

Illustratively, in one embodiment, a second gap is formed between the first housing and the second housing, and the third surface closes the second gap. Specifically, the first and second treating devices may be stacked in an up-down direction, the first gap being located at a front side of the laundry treating apparatus, and the second gap being located at a side of the laundry treating apparatus in a left-right direction.

In order to further improve the injection molding effect and reduce the flow mark, in an embodiment, referring to fig. 3, a portion of the side edge 40 corresponding to the gate forming region is a gate portion 41, and the gate portion 41 is located at an end of the side edge 40 close to the main appearance plate. A portion of the gate portion 41 is connected to the main appearance plate, and a peripheral portion of the side edge 40 located at the remaining portion of the gate portion 41 is configured as a dam portion 42, and a thickness of the dam portion 42 is smaller than a thickness of the gate portion 41 and smaller than a thickness of a connecting portion of the main appearance plate and the gate portion 41. That is, the gate portion 41 is provided adjacent to the main exterior plate, and the gate portion 41 is provided as close as possible to the main exterior plate when the design of the mold and the pouring are satisfied without the gate portion 41 affecting the outer appearance of the main exterior plate. The periphery of the remaining portion of gate portion 41 of side edge 40 is thinned to form dam portion 42.

The main appearance plate refers to the main appearance structure of the injection molding piece. For example, the main appearance edge may be the appearance panel 10 or the annular appearance edge 1, etc.

In terms of the mold, in one embodiment, the portion of the side cavity corresponding to the gate is a gate portion 41 sub-cavity, and the gate portion 41 sub-cavity is located at one end of the side cavity close to the main appearance plate type cavity 100. The part of the gate part 41 sub-cavity is communicated with the main appearance plate type cavity 100, the surrounding part of the side cavity, which is positioned at the rest part of the gate part 41 sub-cavity, is configured to be a material blocking part 42 sub-cavity, and the thickness of the material blocking part 42 sub-cavity is smaller than that of the gate part 41 sub-cavity and smaller than that of the connecting part of the main appearance plate type cavity 100 and the gate part 41 sub-cavity. The sub-cavity of gate portion 41 is used for injection molding of gate portion 41. The sub-cavity of the blocking portion 42 is used for injection molding the blocking portion 42. The melt from the gate first enters the sub-cavity of the gate portion 41, and the melt from the sub-cavity of the gate portion 41 enters the sub-cavities of the main appearance board cavity 100 and the material stopping portion 42, respectively. The sub-cavity of the material stopping part 42 is positioned on a flow path of the melt flowing from the pouring gate to the side cavity, and the melt flows through the sub-cavity of the material stopping part 42 firstly and then flows to the side cavity.

Adopt runner portion 41 sub-chamber and hinder material portion 42 sub-chamber can effectively reduce the flow mark of the outward appearance face of main outward appearance board, during the pouring, the fuse-element gets into runner portion 41 sub-chamber from the runner, and partly fuse-element directly flows to main outward appearance board type chamber 100 from runner portion 41 sub-chamber, and another part fuse-element directly flows to hindering material portion 42 sub-chamber from runner portion 41 sub-chamber, again from hindering remaining position that material portion 42 sub-chamber flows to the side die cavity. Because the thickness that hinders the sub-chamber of material portion 42 is less than the thickness of runner portion 41 sub-chamber, and be less than the thickness at the position of being connected of main outward appearance plate type chamber 100 and runner portion 41 sub-chamber, consequently, the resistance that the fuse-element flows to main outward appearance plate type chamber 100 from runner portion 41 sub-chamber is less than the resistance that flows to hinder sub-chamber of material portion 42, the speed and the flow that the fuse-element flows to main outward appearance plate type chamber 100 are greater than the speed and the flow that the flow direction hinders sub-chamber of material portion 42, that is to say, because the attenuate design that hinders sub-chamber of material portion 42, play certain fender stream effect to the fuse-element, reduce the speed and the flow of the other positions of fuse-element flow direction side die cavity. Therefore, the main appearance plate type cavity 100 can be filled with the melt preferentially, the side edge cavity is filled with the melt again, a small time difference exists between the main appearance plate type cavity 100 and the rest parts filled with the side edge cavity, the melt is more prone to flow from the main appearance plate type cavity 100 to the rest parts filled with the side edge cavity at the junction of the main appearance plate type cavity 100 and the rest parts filled with the side edge cavity, the probability that the melt in the rest parts of the side edge cavity flows to the main appearance plate type cavity 100 is small, the probability that the melt in the rest parts of the side edge cavity continuously impacts a solidified layer in the main appearance plate type cavity 100 is reduced, the probability that flow marks appear on an appearance surface formed by the main appearance plate type cavity 100 is reduced or avoided, and the yield of injection molding pieces is improved.

It should be noted that, since the sub-cavity of the material blocking portion 42 does not completely block the flow path between the sub-cavity of the gate portion 41 and the rest of the side cavity, when the melt flows to the main appearance plate type cavity 100, the melt will also flow to the rest of the side cavity through the sub-cavity of the material blocking portion 42, and only the flow rate and flow rate are smaller than those in the main appearance plate type cavity 100.

The dam portion 42 extends substantially along the periphery of the gate portion 41, and it is understood that the dam portion 42 may be completely continuous along the extending direction or may be broken in a discontinuous configuration within a partially narrow range.

Illustratively, the dam portion 42 is continuously provided around the periphery of the gate portion 41 other than the connection portion with the main appearance plate, so as to achieve a better dam effect.

For example, in some embodiments, referring to fig. 3, the material blocking portion 42 is substantially U-shaped, and an opening side of the U-shape faces a side where the main appearance plate is located. In other embodiments, the dam 42 is formed by connecting a plurality of substantially linear structures in sequence.

It should be noted that, since the flow speed of the melt in the main design panel type cavity 100 is greater than the flow speed in the rest of the side cavity, the melt in the main design panel type cavity 100 is liable to curl and turn toward one side of the rest of the side cavity, but since the injection-molded side 40 of the side cavity has a non-design structure, the appearance of the injection-molded part is not affected by the flow mark and other defects of the side 40, and therefore, the side 40 does not require defects, and some possible defects and/or some unavoidable defects can be placed on the side 40.

Illustratively, the gate portion 41 is of substantially uniform thickness design, i.e., the thickness of each position of the gate portion 41 is substantially equal.

In some embodiments, the number of gate portions 41, the number of dam portions 42, and the number of gates are the same, and the gate portions 41, the dam portions 42, and the gates correspond one-to-one.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions after the technical scope of the present application, and shall cover the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An injection molded part, comprising:

a first reinforcing rib connected to the first non-exterior surface;

2. An injection molded part according to claim 1, characterized in that the predetermined angle is between 30 ° and 60 °.

3. The injection molded part of claim 1, comprising a second reinforcing bead attached to the first non-cosmetic surface;

4. The injection molded part of claim 3, wherein at least one end of the first reinforcing bead is connected to the second reinforcing bead.

5. The injection molded part of claim 1, wherein the first bead has a maximum thickness that is less than a thickness of the appearance plate.

6. The injection molded part of claim 1, wherein the outer plate has a thickness of between 2.0mm and 3.0 mm; and/or the presence of a gas in the gas,

the thickness of the first reinforcing rib is 0.5 mm-2.0 mm.

7. An electrical household appliance comprising the injection molded part of any one of claims 1 to 6.

8. A mold, comprising a mold core, wherein the mold core comprises:

an appearance board cavity;

9. The mold of claim 8, wherein the predetermined angle is between 30 ° and 60 °.

10. The mold according to claim 8, wherein the mold core comprises a second rib cavity, the second rib cavity is communicated with the side of the appearance plate cavity where the first rib cavity is located;

11. The mold of claim 10, wherein at least one end of the first rib cavity is in communication with the second rib cavity.

12. The mold of claim 8, wherein the first stiffener cavity has a maximum thickness less than a thickness of the appearance panel cavity.

13. The mold of claim 8, wherein the thickness of the appearance plate cavity is between 2.0mm and 3.0 mm; and/or the presence of a gas in the gas,

the thickness of the first reinforcing rib cavity is between 0.5mm and 2.0 mm.