CN112208062A

CN112208062A - Mold manufacturing method, mold, shell manufacturing method and shell

Info

Publication number: CN112208062A
Application number: CN201910615511.7A
Authority: CN
Inventors: 孟祥发
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2021-01-12

Abstract

The disclosure relates to a mold manufacturing method, a mold, a shell manufacturing method and a shell. The mold manufacturing method comprises the following steps: fixing the male die surface of the die to be processed by using fixing equipment; processing preset textures on the male die surface of the die to be processed by using texture processing equipment; and polishing the processed texture by using polishing equipment. The die is manufactured by the die manufacturing method. The shell manufacturing method is manufactured by using the die. The texture is directly processed in the mold, so that injection molding and texture processing can be simultaneously carried out, and processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

Description

Mold manufacturing method, mold, shell manufacturing method and shell

Technical Field

The disclosure relates to the field of terminal equipment, in particular to a mold manufacturing method, a mold and a shell manufacturing method.

Background

With the advent of the mobile internet era, terminal devices (such as mobile phones, tablet computers and the like) become an indispensable part of the life of people, can bring rich and colorful contents to people, and play an increasingly important role in the fields of work, study, entertainment and the like of people. Along with the continuous improvement of consumer's consumption level, the consumer is more and more high to terminal equipment appearance quality requirement, and wherein the glass casing has widely used on high-end equipment, through set up the texture diaphragm on the glass casing, can obtain better decorative effect.

For medium and low-end equipment, generally, a low-cost plastic injection molding shell is adopted due to the influence of cost, and in order to obtain a better appearance effect, in the related technology, the purpose of simulating the display effect of a glass shell is achieved by etching textures on a transparent plastic injection molding shell. The scheme mainly comprises the following steps: firstly, processing textures on a plastic injection molding plate blank by a UV transfer printing technology, and then coating a film, printing a color layer and a bottom layer; secondly, placing the manufactured plate blank into a high-pressure hot bending die, and enabling the planar plate blank to change the shape along with the die cavity under the action of pressure and temperature to obtain a plastic injection molding shell; and finally, machining the plastic injection molding shell in the step, and cutting off peripheral waste materials to obtain the plastic injection molding shell with the required size. The shell can present corresponding textures so as to achieve the effect of simulating a glass shell and improve the appearance effect of the terminal equipment.

However, the above scheme requires that the shell is formed after the texture is processed, and the manufacturing process is complicated; in addition, when the plastic injection molding shell is formed by high-pressure hot bending, the textures at the four corners of the plastic injection molding shell are easy to deform, so that the final attractiveness of the shell is influenced; and because the four corners of the shell are bent into cambered surfaces from plane materials, the materials have resilience internal stress, and after the whole machine is assembled, the risk of tilting and cracking exists.

Disclosure of Invention

In order to overcome the problems that the shell manufacturing process is complex, the textures at the four corners of the shell are easy to deform and the shell is easy to tilt and crack after being installed in the related technology, the disclosure provides a die manufacturing method, a die and a shell manufacturing method.

According to a first aspect of embodiments of the present disclosure, there is provided a mold manufacturing method including:

preparing a die to be processed with a preset structure;

processing preset textures on the male die surface of the die to be processed by using texture processing equipment;

and polishing the processed texture by using polishing equipment.

In some possible embodiments, the texture processing device is a laser etcher.

In some possible embodiments, the texture is less than or equal to 5mm from a highest point of the side surface of the relief surface to the bottom surface of the relief surface.

In some possible embodiments, the included angle between the tangent line of the texture at the highest point of the side surface of the convex mould surface and the vertical direction is greater than or equal to 30 °.

In some possible embodiments, the texture is deep into the relief surface by a distance of 10-100 μm.

In some possible embodiments, the distance between two adjacent textures is 30-150 μm.

In some possible embodiments, the texture has a finish on the A3-A0 scale.

According to another aspect of the embodiments of the present disclosure, there is provided a mold manufactured by the mold manufacturing method as described in any one of the above.

According to still another aspect of the embodiments of the present disclosure, there is provided a casing manufacturing method, which is manufactured by using the mold as described above; the method comprises the following steps:

placing a transparent plastic material into the mold by using injection molding equipment for injection molding, so that the plastic material forms a shell biscuit with a texture on the concave surface;

coating a film on the concave surface of the shell biscuit by using a film coating device;

spraying colors on the surface of the housing biscuit by using coloring equipment;

and cutting the edge of the housing biscuit by using cutting equipment to obtain the housing.

In some possible embodiments, after the cutting the edge of the housing blank with the cutting apparatus, the method further includes:

triggering detection equipment to detect whether the parameters of the shell meet requirements;

the parameters of the shell at least comprise at least one of shape, size, color and texture pattern.

According to a further aspect of the embodiments of the present disclosure, there is provided a housing manufactured by the housing manufacturing method as described in any one of the above.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the texture is directly processed in the mold, so that injection molding and texture processing can be simultaneously carried out, and processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a flow chart illustrating a method of manufacturing a mold according to an exemplary embodiment.

FIG. 2 is a schematic diagram of a mold shown according to an exemplary embodiment.

Fig. 3 is a related dimension view of the cam surface of fig. 2.

Fig. 4 is a related dimension view of the cam surface of fig. 2.

FIG. 5 is a flow chart illustrating a method of manufacturing a housing according to an exemplary embodiment.

Fig. 6 is a block diagram of a terminal device according to an example embodiment.

Description of reference numerals:

110-a male mold;

111-male mould face;

120-a female die;

121-die face;

210-a memory;

220-a processor;

230-a power supply component;

240-multimedia components;

250-an audio component;

260-input/output (I/O) interface;

270-a sensor assembly;

280-a communication component.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Along with the continuous improvement of consumer's consumption level, the consumer is more and more high to terminal equipment appearance quality requirement, and wherein the glass casing has widely used on high-end equipment, through set up the texture diaphragm on the glass casing, can obtain better decorative effect. For medium and low-end equipment, generally, a low-cost plastic injection molding shell is adopted due to the influence of cost, and in order to obtain a better appearance effect, in the related technology, the purpose of simulating the display effect of a glass shell is achieved by etching textures on a transparent plastic injection molding shell. The scheme mainly comprises the following steps: firstly, processing textures on a plastic injection molding plate blank by a UV transfer printing technology, and then coating a film, printing a color layer and a bottom layer; secondly, placing the manufactured plate blank into a high-pressure hot bending die, and enabling the planar plate blank to change the shape along with the die cavity under the action of pressure and temperature to obtain a plastic injection molding shell; and finally, machining the plastic injection molding shell in the step, and cutting off peripheral waste materials to obtain the plastic injection molding shell with the required size. The shell can present corresponding textures so as to achieve the effect of simulating a glass shell and improve the appearance effect of the terminal equipment.

FIG. 1 is a flow chart illustrating a method of manufacturing a mold according to an exemplary embodiment. FIG. 2 is a schematic diagram of a mold shown according to an exemplary embodiment. Fig. 3 is a related dimension view of the cam surface of fig. 2. Fig. 4 is a related dimension view of the cam surface of fig. 2. Please refer to fig. 1-4.

Example one

As shown in fig. 1, the present embodiment provides a mold manufacturing method, including:

fixing the male die surface of the die to be processed by using fixing equipment;

and polishing the processed texture by using polishing equipment.

Specifically, the mold to be processed refers to a terminal device shell mold with a non-textured surface used in the prior art. The texture processing device may be a cutting machine or the like, and is selected according to the size of the texture. The polishing apparatus may be a polisher or the like.

In some possible embodiments, the texture processing device may be a laser etching machine, and the laser etching machine has the advantages of high processing precision, uniform and accurate etching, and the like, and can ensure the etching depth of the texture and the uniformity of the width of the lines of the texture.

In some possible embodiments, as shown in fig. 3, the distance h between the highest point of the side surface of the male die surface 111 and the bottom surface of the male die surface 111 is less than or equal to 5mm, and limiting the size of h to be within 5mm can meet the size requirement of most terminal equipment shells on the market.

In some possible embodiments, as shown in fig. 4, the included angle θ between the tangent line of the texture at the highest point of the side surface of the male die surface 111 and the vertical direction is greater than or equal to 30 °, and setting the included angle θ to be greater than or equal to 30 ° can better reduce the internal stress at the four corners of the shell, thereby preventing the shell from warping and cracking.

In some possible embodiments, the texture is deep into the raised mold surface 111 by 10-100 μm, and the texture is controlled to be deep into the raised mold surface 111 by 10-100 μm, so that the texture has higher strength, and the service life of the mold is prolonged.

In some possible embodiments, the distance between two adjacent textures is 30-150 μm, so that the textures can be guaranteed to have better definition.

In some possible embodiments, the texture is polished to a grade of A3-a0, and in particular, the texture can be polished with #1000- #14000 diamond gypsum to improve the surface smoothness of the texture.

The technical scheme provided by the embodiment can have the following beneficial effects:

the mold manufacturing method of the embodiment directly processes the texture in the mold, so that injection molding and texture processing can be simultaneously carried out, and the processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

Example two

The present embodiment provides a mold manufacturing apparatus including:

the fixing equipment is used for fixing the male die surface of the die to be processed;

the texture processing equipment is used for processing preset textures on the male die surface of the die to be processed;

and the polishing equipment is used for polishing the processed textures.

the mold manufacturing equipment of the embodiment directly processes the texture in the mold, so that injection molding and texture processing can be simultaneously carried out, and the processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

EXAMPLE III

As shown in fig. 2, the present embodiment provides a mold manufactured by the mold manufacturing method according to the first embodiment.

Specifically, the mold includes a male mold 110 and a female mold 120, the male mold 110 has a male mold surface 111, the male mold surface 111 is processed with a plurality of textures by using the mold manufacturing method described in the first embodiment, the specific shapes of the textures may be preset as required, and this embodiment does not further limit the specific shapes; the die 120 is provided with a die surface 121, and the die surface 121 is used for accommodating raw materials to be processed. After the raw material to be processed is placed on the female mold surface 121, the male mold 110 is pressed down so that the male mold surface 111 is brought into contact with the raw material to be processed to form a texture pattern.

the mold of the embodiment can directly process the texture, so that injection molding and texture processing can be simultaneously carried out, and the processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

Example four

FIG. 5 is a flow chart illustrating a method of manufacturing a housing according to an exemplary embodiment; please refer to fig. 5. The present embodiment provides a method for manufacturing a housing, which is manufactured by using the mold described in the third embodiment; the method comprises the following steps:

and (3) putting the transparent plastic material into a mould by using injection molding equipment for injection molding, so that the plastic material forms a shell biscuit with a texture on the concave surface.

The transparent plastic material is placed in the concave die surface of the die, and the texture pattern is formed by pressing the convex die surface of the die.

And coating the concave surface of the shell biscuit by using coating equipment.

The brightness and the light reflection effect of the texture can be improved through film coating, so that the attractiveness of the shell is improved.

And (5) spraying colors on the surface of the shell body blank by using coloring equipment.

The housing can have gorgeous colors by spraying colors, so that the aesthetic property of the housing is further improved.

In some possible embodiments, after cutting the edge of the housing blank with the cutting apparatus, the method further comprises:

wherein, the parameters of the shell at least comprise at least one of shape, size, color and texture pattern.

the shell processed by the shell manufacturing method of the embodiment can be directly processed with textures, so that injection molding and texture processing can be carried out simultaneously, and the processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

EXAMPLE five

The present embodiment provides a housing manufactured by the housing manufacturing method according to the fourth embodiment.

The specific processing steps are as described in the fourth embodiment, and are not described herein again.

the texture can be directly processed on the shell, so that injection molding and texture processing can be simultaneously carried out, and processing procedures are reduced; the texture can be directly formed through the die, and the formed texture cannot be subjected to high-pressure hot bending and other processes, so that the texture at the four corners of the shell is not easy to deform, and the attractiveness of the shell is improved; in addition, the shell is directly molded, so that a high-pressure hot bending process is omitted, the internal stress at the four corners of the shell is small, and the shell is not easy to tilt and crack after being assembled and finished.

EXAMPLE six

The present embodiment provides a terminal device including the housing as described in the fifth embodiment above.

Specifically, the terminal device of this embodiment may be a mobile phone, a computer, a tablet device, a personal digital assistant, a medical device, a fitness device, or the like.

The housing may be a rear case of the terminal device.

the terminal device of the embodiment has better appearance effect and lower cost due to the adoption of the shell.

FIG. 6 is a block diagram of a terminal device shown in accordance with an exemplary embodiment; as shown in fig. 6, the terminal device includes:

a memory 210 and a processor 220.

Memory 210 is used to store executable instructions for processor 220.

In the above terminal embodiments, it should be understood that the Processor 220 may be a Central Processing Unit (CPU), other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the aforementioned memory may be a read-only memory (ROM), a Random Access Memory (RAM), a flash memory, a hard disk, or a solid state disk. SIM cards, also known as subscriber identity cards, smart cards, must be installed in a digital mobile phone for use. That is, the information of the digital mobile phone client, the encrypted key and the contents of the user's phone book are stored on the computer chip. The steps of a method disclosed in connection with the embodiments of the present disclosure may be embodied directly in a hardware processor, or in a combination of hardware and software modules.

The terminal device may include one or more of the following components: memory 210, processor 220, power component 230, multimedia component 240, audio component 250, input/output (I/O) interface 260, sensor component 270, and communication component 280.

The processor 220 generally controls overall operations of the terminal device, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processor 220 may include one or more sub-processors to execute instructions to perform all or a portion of the steps of the methods described above. Further, processor 220 may include one or more modules that facilitate interaction between processor 220 and other components. For example, the processor 220 may include a multimedia module to facilitate interaction between the multimedia component 240 and the processor 220.

The memory 210 is configured to store various types of data to support operations at the terminal device. Examples of such data include instructions for any application or method operating on the terminal device, contact data, phonebook data, messages, pictures, videos, etc. The memory 210 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 230 provides power to the various components of the terminal device. The power components 230 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal device.

The multimedia component 240 includes a touch-sensitive display screen providing an output interface between the terminal device and the user. In some embodiments, the touch display screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 240 includes a front facing camera and/or a rear facing camera. When the terminal device is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 250 is configured to output and/or input audio signals. For example, the audio component 250 includes a Microphone (MIC) configured to receive an external audio signal when the terminal device is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 210 or transmitted via the communication component 280. In some embodiments, audio component 250 also includes a speaker for outputting audio signals.

I/O interface 260 provides an interface between processor 220 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 270 includes one or more sensors for providing various aspects of status assessment for the terminal device. For example, the sensor assembly 270 may detect the open/closed status of the terminal device, the relative positioning of the components, such as the display and keypad of the terminal device, the sensor assembly 270 may also detect a change in the position of the terminal device or a component of the terminal device, the presence or absence of user contact with the terminal device, orientation or acceleration/deceleration of the terminal device, and a change in the temperature of the terminal device. The sensor assembly 270 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 270 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 270 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 280 is configured to facilitate wired or wireless communication between the terminal device and other devices. The terminal device may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 280 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 280 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method of manufacturing a mold, comprising:

preparing a die to be processed with a preset structure;

and polishing the processed texture by using polishing equipment.

2. The method of manufacturing a mold according to claim 1, wherein the texture processing device is a laser etcher.

3. The mold manufacturing method of claim 1, wherein a distance between a highest point of the texture on the side surface of the relief surface and the bottom surface of the relief surface is 5mm or less.

4. The mold manufacturing method according to claim 1, wherein an angle between a tangent line of the texture at a highest point of the side surface of the male mold surface and a vertical direction is equal to or greater than 30 °.

5. The method of manufacturing a mold according to claim 1, wherein the texture is provided at a distance of 10 to 100 μm into the convex mold surface.

6. The mold manufacturing method according to claim 1, wherein a distance between two adjacent textures is 30 to 150 μm.

7. The mold-making process of claim 1, wherein the texture has a finish on the order of A3-a 0.

8. A mold produced by the mold production method according to any one of claims 1 to 7.

9. A housing manufacturing method characterized by using the mold according to claim 8; the method comprises the following steps:

10. The method of manufacturing a housing of claim 9, further comprising, after cutting the edge of the housing biscuit with the cutting apparatus:

11. A housing manufactured by the housing manufacturing method according to any one of claims 9 to 10.