Manufacturing method of in-mold insert product, in-mold insert product and clothing processing equipment

Abstract

The present application provides a method for manufacturing an in-mold insert product, an in-mold insert product, and a clothing processing device, the manufacturing method comprising: processing a first through hole on a diaphragm; placing the diaphragm provided with the first through hole into an injection mold, and using in-mold injection molding to obtain an in-mold insert product; processing a second through hole in the injection molding layer of the in-mold insert product, wherein the second through hole is connected to the first through hole to jointly define a through hole that penetrates the in-mold insert product. In an embodiment of the present application, a hole is first opened on the diaphragm before in-mold injection molding, which can control the wrinkles and shrinkage of the diaphragm to a smaller range, or even substantially eliminate wrinkles and shrinkage; after the in-mold injection molding is completed, the diaphragm will not be affected during the processing of the second through hole, which can effectively improve the wrinkling, burrs, and other phenomena of the diaphragm, reduce the probability of the diaphragm warping, and improve the appearance and product consistency of the in-mold insert product.

Description

Technical Field

[0001] The present application relates to the technical field of in-mold injection molding technology, and in particular to a manufacturing method of an in-mold insert product, an in-mold insert product, and clothing processing equipment. Background Art

[0002] In-mold injection molding involves placing a pre-printed film into an injection mold, then injecting resin onto the back of the film, bonding the two together and curing them. Products made with in-mold injection can achieve both decorative and functional effects, and are therefore widely used in various fields.

[0003] In the related art, according to design requirements, it is necessary to open holes in the formed in-mold injection molded product. However, after the holes are opened, wrinkles, flashes, burrs, etc. are easily formed on the surface of the diaphragm, which affects the appearance of the in-mold injection molded product and also makes the product consistency poor. Summary of the Invention

[0004] In view of this, the embodiments of the present application hope to provide a method for manufacturing an in-mold insert product, an in-mold insert product, and a clothing processing device that improve the diaphragm warping phenomenon.

[0005] The present invention provides a method for manufacturing an in-mold insert product, comprising:

[0006] machining a first through hole in the diaphragm;

[0007] Placing the diaphragm provided with the first through hole into an injection mold, and performing in-mold injection molding to obtain an in-mold insert product;

[0008] A second through hole is processed in the injection molding layer of the in-mold insert product, wherein the second through hole is communicated with the first through hole to jointly define a through hole that penetrates the in-mold insert product.

[0009] In some embodiments, before the step of machining the first through hole on the membrane, the manufacturing method further comprises: performing a printing process on the membrane.

[0010] In some embodiments, machining the first through hole on the diaphragm includes:

[0011] The diaphragm is subjected to a thermoforming process, and the first through hole is formed during the thermoforming process.

[0012] In some embodiments, the step of performing a thermoforming process on the diaphragm to form the first through hole during the thermoforming process includes: heating a concave mold of a thermoforming mold to a first preset temperature;

[0013] Place the diaphragm on the die;

[0014] The male mold of the hot pressing mold is moved to close the mold with the female mold, wherein the male mold of the hot pressing mold is provided with an ejector pin for penetrating the diaphragm, and the ejector pin is used to penetrate the diaphragm during the closing process to form the first through hole on the diaphragm.

[0015] In some embodiments, a projection of the second through hole on the membrane is located inside the first through hole.

[0016] In some embodiments, the equivalent diameter of the first through-hole does not exceed 4 mm.

[0017] In some embodiments, the first through hole and the second through hole are both circular, and a diameter of the second through hole is smaller than a diameter of the first through hole.

[0018] In some embodiments, the difference between the diameters of the first through hole and the second through hole is 1 mm to 2 mm.

[0019] An embodiment of the present application provides an in-mold insert product, which is manufactured using the manufacturing method of the in-mold insert product described in any embodiment of the present application.

[0020] In some embodiments, the through holes serve as sound-permeable holes for in-mold insert products.

[0021] A clothing processing device, characterized in that it includes a housing and the in-mold insert product described in any embodiment of the present application, the in-mold insert product is arranged on the housing, and the diaphragm serves as the appearance surface of the clothing processing device.

[0022] In some embodiments, the clothing processing device includes a control mainboard and a voice announcer, the in-mold insert product is arranged on the outside of the voice announcer, the control mainboard communicates with the voice announcer to control the voice announcer to broadcast voice, and the through hole is used to guide the sound waves emitted by the voice announcer to the external environment of the clothing processing device.

[0023] The manufacturing method of the embodiment of the present application is to first open a hole in the diaphragm before in-mold injection molding. During the hole opening process, the degree of plastic deformation of the material at the hole wall of the diaphragm is small, and the degree of rebound of the material of the hole wall of the diaphragm is also small. Therefore, the wrinkles and shrinkage of the diaphragm can be controlled within a small range, or even basically no wrinkles or shrinkage. At this time, the hole opening will basically not form residual stress in the diaphragm. After the in-mold injection molding is completed, only the position of the injection molding layer corresponding to the first through hole is opened to ensure that the first through hole and the second through hole are connected. The diaphragm will not be affected during the processing of the second through hole. Therefore, it can effectively improve the wrinkling, flashing, burrs and other phenomena of the diaphragm, reduce the probability of the diaphragm warping, and improve the appearance and product consistency of the in-mold insert product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic flow chart of a method for manufacturing an in-mold insert product according to an embodiment of the present application;

[0025] Figure 2 This is a schematic structural diagram of an in-mold insert according to an embodiment of the present application;

[0026] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0027] Figure 4 for Figure 2 An exploded schematic diagram of the structure shown;

[0028] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 6 for Figure 2 a schematic diagram of another perspective of the structure shown;

[0030] Figure 7 For the Figure 6 A cross-sectional view taken along the CC direction, wherein the knob 3 is assembled to the in-mold insert;

[0031] Figure 8 for Figure 7 A local enlarged schematic diagram of point D in the middle.

[0032] Description of Reference Numerals

[0033] In-mold insert product 100; diaphragm 11; first through hole 11a; avoidance opening 11b; injection molding layer 12; second through hole 12a; connecting structure 121; knob 3 DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the embodiments of the present application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0036] The present invention provides a method for manufacturing an in-mold insert product 100. Figure 1 , including the following steps:

[0037] S10: Processing the first through hole 11a on the diaphragm 11. Figure 4 and Figure 5 , Figure 4 and Figure 5 Schematic diagram of the structure after the first through hole 11 a is processed on the diaphragm 11. It should be noted that the first through hole 11 a can be processed at any appropriate position on the diaphragm 11.

[0038] S20: placing the diaphragm 11 provided with the first through hole 11 a into an injection mold, and performing in-mold injection molding to obtain an in-mold insert product 100 .

[0039] S30: Processing a second through hole 12a in the injection molding layer 12 of the in-mold insert product 100, wherein the second through hole 12a is connected to the first through hole 11a to define a through hole that penetrates the in-mold insert product 100. In other words, the first through hole 11a and the second through hole 12a are at least partially aligned. Figure 2 and Figure 3 , Figure 2 and Figure 3 The in-mold insert product 10 has a first through hole 11 a and a second through hole 12 a .

[0040] It should be noted that the diaphragm 11 placed in the injection mold comprises at least three layers: from the inside out, a substrate layer, an ink layer, and a wear-resistant material layer. During the in-mold injection molding process, liquid resin is poured onto the substrate layer of the diaphragm 11. After the in-mold molding process, the resin cools to form the injection layer 12, in which the diaphragm 11 and the resin are integrated. The wear-resistant material layer is the outermost layer of the in-mold product 100. The ink layer sandwiched between the layers ensures that the in-mold product 100 retains its vibrant color and resists fading. The wear-resistant material layer also offers excellent friction resistance, reducing the chance of scratches on the surface of the in-mold product 100.

[0041] It should be noted that the diaphragm 11 placed in the injection mold can be a two-dimensional planar shape or a three-dimensional solid shape, which is not limited here.

[0042] The material of the substrate layer is not limited, and may be, for example, PET (Polyethylene terephthalate), PMMA (Polymethyl methacrylate), PC (Polycarbonate), PVC (Polyvinyl chloride), etc. The substrate layer may be made of a single material or a combination of multiple materials.

[0043] In the related art, after the injection molding of the in-mold insert is completed, a through hole is processed on the in-mold insert product. During the drilling process, since the drilling needs to continuously drill through the diaphragm and the injection molding layer, the part of the diaphragm corresponding to the drilling hole will be stretched and produce a large plastic deformation until part of the material is peeled off from the diaphragm. After the drilling is completed, part of the material at the hole wall of the diaphragm rebounds, resulting in more wrinkles and shrinkage on the outer surface of the diaphragm, and the shape and distribution of the wrinkles and shrinkage are random and uncontrollable, which on the one hand affects the appearance of the in-mold insert product, and on the other hand leads to poor product consistency of the in-mold insert product; in addition, after drilling, there are many burrs and flash at the edge of the hole of the diaphragm, which affects the appearance and touch of the in-mold insert product; furthermore, after drilling, there is a large residual stress at the junction of the injection molding layer and the diaphragm, which easily causes the diaphragm to partially separate from the injection molding layer, resulting in the phenomenon of local warping of the diaphragm.

[0044] In the manufacturing method of the embodiment of the present application, a hole is first opened on the diaphragm 11 before in-mold injection molding. During the hole opening process, the degree of plastic deformation of the material at the hole wall of the diaphragm 11 is small, and the degree of rebound of the material at the hole wall of the diaphragm 11 is also small. Therefore, the wrinkles, shrinkage and other defects of the diaphragm 11 can be controlled within a small range, or even basically no wrinkles or shrinkage. At this time, the hole opening will basically not form residual stress in the diaphragm 11. After the in-mold injection molding is completed, a hole is only opened at the position of the injection layer 12 corresponding to the first through hole 11a to ensure that the first through hole 11a and the second through hole 12a are connected. The diaphragm 11 will not be affected during the processing of the second through hole 12a. Therefore, the wrinkles, flash, burrs and other phenomena of the diaphragm 11 can be effectively improved, the probability of the diaphragm 11 warping is reduced, and the appearance and product consistency of the in-mold insert product 100 are improved.

[0045] The injection material injected into the injection mold is not limited, and can be, for example, PC (Polycarbonate), PMMA (Polymethyl methacrylate), PBT (polybutyleceterephthalate), etc.

[0046] Exemplarily, before step S10, the manufacturing method further comprises: performing a printing process on the diaphragm. That is, step S10 is performed after the printing process, and during the preparation process of the diaphragm 11, the printing process is performed first, and then the first through hole 11a is processed.

[0047] The specific process of the printing process is not limited, for example, silk screen printing.

[0048] It should be noted that the first through hole 11 a may be processed in any preparation process of the membrane 11 after the printing process.

[0049] Exemplarily, the processing of the first through hole 11a on the diaphragm 11 includes:

[0050] The diaphragm 11 is subjected to a hot pressing process, and the first through hole 11 a is formed during the hot pressing process.

[0051] The hot pressing process is to form the diaphragm 11 into the desired shape of the product in a preheated state. In the preheated state, the diaphragm 11 softens and is more easily deformed, making it easier to form the first through hole 11a. After the first through hole 11a is formed, there is basically no wrinkle or shrinkage on the diaphragm 11.

[0052] Exemplarily, the step of performing a hot pressing process on the diaphragm 11 and forming the first through hole 11a during the hot pressing process includes:

[0053] heating the concave mold of the hot pressing mold to a first preset temperature;

[0054] Place the diaphragm 11 on the die;

[0055] The male mold of the hot pressing mold is moved to close the mold with the female mold, wherein the male mold of the hot pressing mold is provided with an ejector pin for penetrating the diaphragm 11, and the ejector pin is used to penetrate the diaphragm 11 during the closing process to form the first through hole 11a on the diaphragm 11.

[0056] In this embodiment, the mold closing process can complete the processing of the first through hole 11a, so that the steps of hot pressing forming and processing the first through hole 11a are combined into one, and the hot pressing forming mold itself is used to process the first through hole 11a. While the hot pressing forming mold performs hot pressing treatment on the diaphragm 11 and positions it, the first through hole 11a is also positioned. There is no need to position the first through hole 11a separately for processing, thereby improving the batch consistency of products.

[0057] It should be noted that, during the hot pressing process, the concave mold may be preheated, but the punch may not be preheated; or both the concave mold and the punch may be heated.

[0058] For example, the first preset temperature is 50°C-60°C, for example, 50°C, 51°C, 52°C, 53°C, 55°C, 57°C, 59°C, 60°C, etc. The first preset temperature can fluctuate slightly within the above temperature range, or it can be kept constant at a specific temperature. The clamping pressure of the hot pressing mold is 30 bar-40 bar (bar, a unit of pressure). After hot pressing, the diaphragm 11 is allowed to cool naturally.

[0059] Illustratively, after machining the first through hole 11 a on the diaphragm 11 , the manufacturing method further includes: punching the diaphragm 11 .

[0060] The waste material of the hot-pressed diaphragm 11 is sheared off so that the shape of the diaphragm 11 matches the shape of the product, and the punched diaphragm 11 is placed in an injection mold for in-mold injection molding.

[0061] For example, the main steps of preparing the membrane 11 according to one embodiment are briefly introduced below.

[0062] The preparation process of the diaphragm includes the following steps:

[0063] Cutting step: cutting the rolled film into membrane sheets 11 according to a designed shape, for example, a square shape.

[0064] Pre-shrinkage step: Before printing, the cut film 11 is placed in an oven for heating to reduce the chance of shrinkage.

[0065] Printing process: Printing icons, texts, etc. on the cut film 11; and placing the printed film 11 in a high-temperature oven to dry, solidify the ink, and evaporate the solvent in the ink.

[0066] Protective film pasting step: Paste protective film on one or both sides of the film 11 to avoid scratching the printed surface of the film 11 when punching the positioning holes.

[0067] Punching positioning holes: Punching positioning holes for punching and positioning holes for hot pressing on the diaphragm 11, and the positioning holes for punching and positioning holes for hot pressing must be punched accurately.

[0068] Hot pressing forming step: using a hot pressing forming mold to hot press the diaphragm 11 to shape the diaphragm 11 into the shape of the product.

[0069] Punching step: cutting away the waste material of the hot-pressed film 11 so that the shape of the film 11 matches the shape of the product.

[0070] It should be noted that the step of processing the first through hole 11 a in the embodiment of the present application needs to be placed after the above-mentioned printing processing step.

[0071] For example, see Figure 2 and Figure 3 The projection of the second through hole 12a on the diaphragm 11 is located inside the first through hole 11a. In this way, during the machining of the second through hole 12a, the drilling tool can directly pass through the first through hole 11a and machine the second through hole 12a on the injection molding layer 12, which makes it easy to control the position of the second through hole 12a without affecting the diaphragm 11.

[0072] The shape of the first through hole 11 a is not limited, for example, it can be circular, polygonal, elliptical, etc.

[0073] The shape of the second through hole 12a is not limited, for example, it can be circular, polygonal, elliptical, etc.

[0074] The shapes of the first through hole 11 a and the second through hole 12 a may be the same or different.

[0075] For example, see Figure 4 and Figure 5 , the first through hole 11a and the second through hole 12a are both circular, see Figure 8 , and the diameter of the second through hole 12a is smaller than that of the first through hole 11a. In this embodiment, the circular hole is easy to machine, and the hole edge does not have sharp corners. During the machining of the second through hole 12a, the drilling tool can directly pass through the first through hole 11a without touching the diaphragm 11, which facilitates the control of the position of the second through hole 12a without affecting the diaphragm 11.

[0076] Exemplarily, the difference in diameter between the first through hole 11a and the second through hole 12a is 1 mm to 2 mm (millimeters). For example, the diameter of the first through hole 11a is D1, and the diameter of the second through hole 12a is D2, and 1 mm < (D1 - D2) ≤ 2 mm. For example, the diameter difference is 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, and 2.0 mm. This makes the diameters of the first through hole 11a and the second through hole 12a relatively close, reducing the impact of the interface between the second through hole 12a and the first through hole 11a on the appearance of the in-mold insert product 100.

[0077] Exemplarily, the equivalent diameter of the first through hole 11a does not exceed 4 mm, and can be, for example, 4 mm, 3.5 mm, 3.2 mm, 3 mm, etc. The equivalent diameter refers to the diameter of a circular hole with the same area as the first through hole 11a. It should be understood that when the first through hole 11a is circular, the equivalent diameter is the diameter of the circular hole. Because the first through hole 11a is exposed to the exterior surface of the in-mold product 100, this size range for the first through hole 11a ensures that the size of the first through hole 11a remains within an appropriate range, preventing the first through hole 11a from being too large and affecting the appearance of the in-mold product 100.

[0078] It can be understood that the minimum size of the first through hole 11 a only needs to be sufficient to facilitate processing.

[0079] See also Figures 2 to 8 An embodiment of the present application provides an in-mold insert product 100, and the in-mold insert product 100 is manufactured using the manufacturing method of the in-mold insert product 100 of any embodiment of the present application.

[0080] It should be noted that the through-holes of the in-mold product 100 can be used for any purpose. For example, they can be used as connection holes through which screws are inserted. In another example, they can be used as light guide holes through which light is guided into the surrounding environment of the in-mold product 100.

[0081] For example, the through holes serve as sound-transmitting holes of the in-mold insert product 100. That is, sound waves pass through the through holes.

[0082] The in-mold insert product 100 of the embodiment of the present application is not limited in its application field and can be used for any appropriate product.

[0083] For example, household appliances, communication terminals, automobiles, medical and other industries. Among them, household appliances can be rice cookers, washing machines, refrigerators, air conditioners and the like.

[0084] Illustratively, an embodiment of the present application provides a clothing processing device, comprising a housing and an in-mold insert product 100 provided in any embodiment of the present application, wherein the in-mold insert product 100 is arranged on the housing, and the diaphragm 11 serves as the appearance surface of the clothing processing device.

[0085] In this embodiment, the appearance of the in-mold insert product 100 has good consistency, thereby improving the aesthetic appearance of the clothing processing device.

[0086] The specific type of the clothes processing device is not limited, and can be a drum type or a pulsator type, which is not limited here.

[0087] Exemplarily, the clothes processing device includes a control mainboard and a voice announcer, and the control mainboard communicates with the voice announcer to control the voice announcer to broadcast voice.

[0088] The content of the voice announcer is not limited, for example, the currently running program, the current running time, background music, etc. In this way, the human-computer interaction function of the clothing processing equipment can be increased and the user experience can be improved.

[0089] For example, in-mold insert 100 is positioned outside the voice announcer, and the through-hole is used to direct the sound waves emitted by the voice announcer toward the environment outside the laundry processing device. In other words, the through-hole acts as a sound-permeable hole. In-mold insert 100 not only provides aesthetics and shields the voice announcer, but also directs the sound waves toward the environment outside the laundry processing device.

[0090] The number of through holes is not limited and can be one, two, or more.

[0091] For example, see Figure 4The membrane 11 of the in-mold insert product 100 is provided with a relief opening 11b. It should be noted that the size of this relief opening 11b is significantly larger than the size of the first through-hole 11a. For example, the equivalent diameter of this relief opening 11b is at least five times the equivalent diameter of the first through-hole 11a. This relief opening is already machined into the membrane 11 before printing.

[0092] The injection molding layer 12 of the in-mold insert product 100 is provided with a connection structure 121, that is, the connection structure 121 is injection molded during the injection molding process. Figure 8 The clothes processing device includes a knob 3, which is rotatably mounted on the connecting structure 121. The knob 3 rotates relative to the connecting structure 121 under the action of an external force. The avoidance opening 11b is used to avoid the knob 3.

[0093] The user can select the desired clothing care program by turning the knob 3, for example, washing, dehydration, drying, quick wash and other programs.

[0094] In the description of this application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples without contradiction.

[0095] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for manufacturing an in-mold insert product, characterized in that: include: machining a first through hole in the diaphragm; Placing the diaphragm provided with the first through hole into an injection mold, and performing in-mold injection molding to obtain an in-mold insert product; Processing a second through hole in the injection molding layer of the in-mold insert product, wherein the second through hole is connected to the first through hole to jointly define a through hole penetrating the in-mold insert product; The projection of the second through hole on the diaphragm is located inside the first through hole.

2. The manufacturing method according to claim 1, characterized in that Before the step of machining the first through hole on the diaphragm, the manufacturing method further comprises: performing a printing process on the diaphragm.

3. The manufacturing method according to claim 1, characterized in that The processing of the first through hole on the diaphragm includes: The diaphragm is subjected to a thermoforming process, and the first through hole is formed during the thermoforming process.

4. The manufacturing method according to claim 3, characterized in that The step of performing a hot pressing forming process on the diaphragm and forming the first through hole during the hot pressing forming process includes: heating the concave mold of the hot pressing mold to a first preset temperature; placing the diaphragm on the concave mold; The male mold of the hot pressing mold is moved to close the mold with the female mold, wherein the male mold of the hot pressing mold is provided with an ejector pin for penetrating the diaphragm, and the ejector pin is used to penetrate the diaphragm during the closing process to form the first through hole on the diaphragm.

5. The manufacturing method according to claim 1, characterized in that The equivalent diameter of the first through hole does not exceed 4 mm.

6. The manufacturing method according to claim 1, characterized in that The first through hole and the second through hole are both circular, and a diameter of the second through hole is smaller than a diameter of the first through hole.

7. The manufacturing method according to claim 6, characterized in that The difference between the diameters of the first through hole and the second through hole is 1 mm to 2 mm.

8. An in-mold insert product, characterized in that: The in-mold insert product is manufactured using the manufacturing method for an in-mold insert product according to any one of claims 1 to 7.

9. The in-mold insert product according to claim 8, characterized in that: The through hole serves as a sound-permeable hole for the in-mold insert product.

10. A clothes processing device, characterized in that: It comprises a box body and the in-mold insert product according to claim 9, wherein the in-mold insert product is arranged on the box body, and the diaphragm serves as the appearance surface of the clothing processing device.

11. The clothes treating device according to claim 10, characterized in that: The clothing processing device includes a control mainboard and a voice announcer. The in-mold insert product is arranged on the outside of the voice announcer. The control mainboard communicates with the voice announcer to control the voice announcer to broadcast voice. The through hole is used to guide the sound waves emitted by the voice announcer to the external environment of the clothing processing device.

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