Plastic package mold cleaning device and using method

Abstract

The invention discloses a plastic package mold cleaning device and a using method, and particularly relates to the technical field of integrated circuit packaging. The laser cleaning mechanism comprises a laser emitting module, a focusing module, a reflecting module and a distance measuring module, and the laser emitting module is fixed to the mounting frame and used for emitting laser; the focusing module is used for focusing the laser, the focusing module is in sliding connection with the mounting frame, and the focusing module is driven by the driving device to move back and forth relative to the laser emitting module so as to adjust the focusing position of the laser; the reflecting module is fixed at one end of the mounting frame and is used for reflecting the focused laser to the surface of the mold; the distance measuring module is fixed to the mounting frame and used for detecting the distance between the light outlet of the mounting frame and the surface of the mold. The mold cleaning device can avoid direct contact with the surface of a mold, cannot cause mechanical damage to the mold, is suitable for cleaning molds of different sizes, and is good in cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuit packaging, and in particular to a plastic packaging mold cleaning device and a use method thereof. Background Art

[0002] Plastic packaging is an integrated circuit packaging technology that mainly uses plastic materials to wrap the chip and its connecting lines to protect and support the chip. During the integrated circuit plastic packaging process, the resin, demoulding wax and organic matter in the plastic packaging material will remain on the mold surface. If not cleaned in time, these residues may adhere to the packaged product, resulting in appearance defects such as uneven surface, scratches, bubbles, and lack of glue, affecting the aesthetics and consistency of the product. In addition, the dirt on the mold surface will affect the dimensional accuracy and surface roughness of the mold cavity, which will in turn increase the dimensional deviation of the packaged product, fail to meet the design requirements, and affect the performance of the product and the matching accuracy with other components. The existing cleaning device uses a brush to mechanically clean the contaminants on the mold surface. The cleaning mechanism and the mold itself have physical contact, and it is inevitable to damage the mold. For chip plastic packaging molds with high precision requirements, this cleaning will cause the mold precision to decrease, and the damage will continue to accumulate as the number of cleanings increases. Summary of the invention

[0003] The purpose of the present invention is to provide a plastic packaging mold cleaning device and a method of use to solve the problems existing in the above-mentioned prior art, avoid direct contact with the mold surface, will not cause mechanical damage to the mold, adapt to the cleaning of molds of different sizes, and have a good cleaning effect.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a plastic packaging mold cleaning device, comprising: a mounting frame; a laser cleaning mechanism, comprising a laser emitting module, a focusing module, a reflecting module and a ranging module, wherein the laser emitting module is fixed on the mounting frame and is used to emit laser light; the focusing module is used to focus the laser light, the focusing module is slidably connected to the mounting frame, and the focusing module is driven by a driving device to move back and forth relative to the laser emitting module to adjust the focusing position of the laser light; the reflecting module is fixed at one end of the mounting frame and is used to reflect the focused laser light to the mold surface; the ranging module is fixed on the mounting frame and is used to detect the distance from the light outlet of the mounting frame to the mold surface.

[0006] Preferably, the reflection module includes a reflector and a protective lens for protecting the reflector, the laser passes through the reflector and the protective lens in sequence and irradiates the mold surface, and the distance measuring module is used to detect the distance from the protective lens to the mold surface.

[0007] Preferably, it also includes a blowing assembly, which is fixed on the mounting frame and is used for blowing air onto the protective lens.

[0008] Preferably, the blowing assembly includes an air knife, an air pipe and an air pump, the air knife is connected and communicated with the air pump through the air pipe, the air pipe is fixed to the side wall of the mounting frame by a buckle, and the air knife is located on one side of the protective lens.

[0009] Preferably, a guide rail is provided on the mounting frame along the light emitting direction of the laser emitting module, the focusing module is slidably connected to the guide rail, and the focusing module is driven by the driving device to slide back and forth along the guide rail.

[0010] Preferably, the focusing module includes a focusing mirror and a mounting base, the focusing mirror is fixedly connected to the mounting base, the mounting base is slidably connected to the guide rail, the driving device includes a motor, the motor is connected to the mounting frame through a motor fixing seat, the motor output shaft is connected to a precision adjustment screw through a coupling, the precision adjustment screw is threadedly connected to a nut, and the nut is fixedly connected to the mounting base.

[0011] Preferably, the cross section of the mounting frame is a flat strip.

[0012] Preferably, the mounting frame is made of aluminum alloy, and a plurality of weight-reducing holes are provided on the mounting frame.

[0013] Preferably, a controller is further included, and the distance measuring module, the driving device, the laser emitting module and the air pump are all connected to the controller signal.

[0014] The present invention also provides a method for using the plastic sealing mold cleaning device. When the plastic sealing mold needs to be cleaned, the plastic sealing mold cleaning device receives an instruction and approaches the plastic sealing mold to be cleaned. After reaching the specified position, one end of the mounting frame equipped with a reflection module extends into the opened plastic sealing mold; the ranging module measures the distance from the light outlet of the mounting frame to the mold surface, and according to the detected distance, the position of the focusing module on the mounting frame is adjusted by controlling the driving device, thereby changing the focusing position of the laser emitted by the laser emitting module, so that the focused laser can be accurately irradiated on the surface of the mold to be cleaned through the reflection module, thereby achieving cleaning of the mold surface.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention provides a plastic sealing mold cleaning device and a use method. Plastic particles and other pollutants remaining on the plastic sealing mold are cleaned through the thermal effect and impact effect of the laser of a laser cleaning mechanism. Contactless laser cleaning is used to replace the traditional physical cleaning method of brushing and blowing, thereby reducing the damage of the brush head to the plastic sealing mold and extending the service life of the mold. After cleaning, there is no need to use a scraping detection mechanism to verify the cleaning effect, thereby improving production efficiency. The distance from the light outlet of the mounting frame to the mold surface is detected by a ranging module and fed back to the operator in real time. The distance from the focusing module to the laser emitting module is flexibly adjusted according to the detected distance, so that the focusing spot can be accurately positioned, thereby optimizing the cleaning effect on the target workpiece. The operation is simple and the practicability is high. Moreover, the cleaning of plastic sealing molds with different mold opening sizes can be adapted, the versatility is stronger, and more economic value can be created. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the plastic packaging mold cleaning device.

[0019] In the figure: 1-mounting frame; 2-laser emission module; 3-focusing module; 4-reflection module; 5-air knife; 6-air pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The purpose of the present invention is to provide a plastic packaging mold cleaning device and a method of use to solve the problems existing in the above-mentioned prior art, avoid direct contact with the mold surface, will not cause mechanical damage to the mold, adapt to the cleaning of molds of different sizes, and have a good cleaning effect.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] This embodiment provides a plastic mold cleaning device, such as Figure 1 As shown, it includes a mounting frame 1; a laser cleaning mechanism, including a laser emitting module 2, a focusing module 3, a reflecting module 4 and a ranging module. The laser emitting module 2 is fixed on the mounting frame 1, and is used to emit laser light while ensuring the stability of the light emitting direction; the focusing module 3 is used to focus the laser, and the focusing module 3 is slidably connected to the mounting frame 1. The focusing module 3 is driven by a driving device to move back and forth relative to the laser emitting module 2 to adjust the focusing position of the laser; the reflecting module 4 is fixed at one end of the mounting frame 1, and is used to reflect the focused laser light to the mold surface; the ranging module is fixed on the mounting frame 1, and is used to detect the distance from the light outlet of the mounting frame 1 to the mold surface. The mounting frame 1 is mounted on the robotic arm. When the plastic encapsulation mold needs to be cleaned, the robotic arm drives the mounting frame 1 to move into the plastic encapsulation mold. The thermal effect and impact effect of the laser of the laser cleaning mechanism are used to clean the plastic particles and other pollutants remaining on the plastic encapsulation mold. The non-contact laser cleaning is used instead of the traditional physical cleaning method of brush and air blowing, which reduces the damage of the brush head to the plastic encapsulation mold and prolongs the service life of the mold. After cleaning, there is no need to use a scraping detection mechanism to verify the cleaning effect, thereby improving production efficiency. The distance from the light outlet of the mounting frame 1 to the mold surface is detected by the ranging module and fed back to the operator in real time. The distance from the focusing module 3 to the laser emitting module 2 is flexibly adjusted according to the detected distance, so that the focusing spot can be accurately positioned on the mold surface, and the laser energy can act on the stains to the maximum extent, and efficient cleaning is achieved, thereby optimizing the cleaning effect of the target workpiece. The operation is simple and the practicability is high. Moreover, the cleaning of plastic encapsulation molds of different mold opening sizes can be adapted, the versatility is stronger, and more economic value can be created.

[0025] In the implementation of this embodiment, it is further preferred that the reflection module 4 includes a reflection mirror and a protective lens for protecting the reflection mirror, the laser passes through the reflection mirror and the protective lens in sequence and irradiates the mold surface, and the distance measuring module is used to detect the distance from the protective lens to the mold surface. During the cleaning process, the protective lens can prevent residues and impurities from contacting the reflection mirror, prevent them from scratching the surface of the reflection mirror, and avoid affecting the reflection performance of the reflection mirror and the accuracy of the laser light path.

[0026] In the implementation of this embodiment, it is further preferred that the plastic mold cleaning device further includes a blowing assembly, which is fixed on the mounting frame 1 and is used to blow air onto the protective lens. When the residue impurities fall onto the protective lens, the gas blown out by the blowing assembly can blow away the residue impurities to prevent them from adhering to the surface of the protective lens and affecting the laser light path, thereby extending the service life of the protective lens and avoiding secondary contamination of the cleaned mold.

[0027] It is further preferred in the implementation manner of this embodiment that the blowing assembly includes an air knife 5, an air pipe 6 and an air pump, the air knife 5 is connected and communicated with the air pump through the air pipe 6, the air pipe 6 is fixed to the side wall of the mounting frame 1 by a snap, and the air knife 5 is located on one side of the protective lens.

[0028] In the implementation of this embodiment, it is further preferred that a guide rail is provided on the mounting frame 1 along the light emitting direction of the laser emitting module 2, and a focusing module 3 is slidably connected to the guide rail. The focusing module 3 is driven by a driving device to slide back and forth along the guide rail. The focusing module 3 includes a focusing mirror and a mounting base. The focusing mirror is fixedly connected to the mounting base, and the mounting base is slidably connected to the guide rail. The driving device includes a motor, and the motor is connected to the mounting frame 1 through a motor fixing seat. The motor output shaft is connected to a precision adjustment screw through a coupling, and the precision adjustment screw is threadedly connected to a nut, and the nut is fixedly connected to the mounting base. By adjusting the position of the mounting base, the distance from the light outlet to the mold surface can be changed to adapt to the cleaning of molds of different sizes.

[0029] In the implementation of this embodiment, it is further preferred that the cross section of the mounting frame 1 is a flat strip. By using a flat cleaning head, an extended cavity and a reflector, the distance from the laser light outlet to the mold surface can be shortened to more than ten millimeters, making it easier to reach between the upper and lower molds with a narrower spacing, and realizing online laser cleaning without disassembly.

[0030] It is further preferred in the implementation manner of this embodiment that the mounting frame 1 is made of aluminum alloy, and a plurality of weight-reducing holes are provided on the mounting frame 1 .

[0031] In the implementation of this embodiment, it is further preferred that the plastic mold cleaning device also includes a controller, and the distance measuring module, the driving device, the laser emitting module 2 and the air pump are all connected to the controller signal. The distance between the light outlet and the workpiece surface is measured by the distance measuring module, and the distance information is transmitted to the controller. The controller controls the driving device to drive the focusing module 3 to adjust the focusing distance according to the algorithm analysis, and then controls the laser emitting module 2 to emit the laser, and turns on the air pump to blow away the residual impurities in time through the air knife 5.

[0032] Example 2

[0033] The present embodiment provides a method for using the plastic encapsulation mold cleaning device of embodiment 1. When the plastic encapsulation mold needs to be cleaned, the plastic encapsulation mold cleaning device receives an instruction and approaches the plastic encapsulation mold to be cleaned. After reaching the specified position, the robotic arm drives the mounting frame 1 to install one end of the reflection module 4 to extend into the opened plastic encapsulation mold; the ranging module measures the distance from the light outlet of the mounting frame 1 to the mold surface, and adjusts the position of the focusing module 3 on the mounting frame 1 according to the detected distance by controlling the driving device, thereby changing the focusing position of the laser emitted by the laser emitting module 2, so that the focused laser can be accurately irradiated on the surface of the mold to be cleaned through the reflection module 4, thereby cleaning the mold surface. At the same time, the air knife 5 takes away the residue and impurities generated by the cleaning to avoid secondary pollution to the plastic encapsulation mold. After cleaning, the robotic arm drives the mounting frame 1 to withdraw from the mold cavity, and the entire cleaning process ends.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A plastic packaging mold cleaning device, characterized in that: include: Mounting frame; The laser cleaning mechanism comprises a laser emitting module, a focusing module, a reflecting module and a ranging module. The laser emitting module is fixed on the mounting frame and is used to emit laser. The focusing module is used to focus the laser. The focusing module is slidably connected to the mounting frame. The focusing module is driven by a driving device to move back and forth relative to the laser emitting module to adjust the focusing position of the laser. The reflecting module is fixed at one end of the mounting frame and is used to reflect the focused laser to the mold surface. The ranging module is fixed on the mounting frame and is used to detect the distance from the light outlet of the mounting frame to the mold surface.

2. The plastic packaging mold cleaning device according to claim 1, characterized in that: The reflection module includes a reflection mirror and a protective lens for protecting the reflection mirror. The laser passes through the reflection mirror and the protective lens in sequence and irradiates the mold surface. The distance measuring module is used to detect the distance from the protective lens to the mold surface.

3. The plastic packaging mold cleaning device according to claim 2, characterized in that: It also includes a blowing component, which is fixed on the mounting frame and is used for blowing air onto the protective lens.

4. The plastic packaging mold cleaning device according to claim 3, characterized in that: The air blowing assembly includes an air knife, an air pipe and an air pump. The air knife is connected and communicated with the air pump through the air pipe. The air pipe is fixed to the side wall of the mounting frame through a buckle. The air knife is located on one side of the protective lens.

5. The plastic packaging mold cleaning device according to claim 1, characterized in that: A guide rail is provided on the mounting frame along the light emitting direction of the laser emitting module, the focusing module is slidably connected to the guide rail, and the focusing module is driven by the driving device to slide back and forth along the guide rail.

6. The plastic packaging mold cleaning device according to claim 5, characterized in that: The focusing module includes a focusing mirror and a mounting base, wherein the focusing mirror is fixedly connected to the mounting base, and the mounting base is slidably connected to the guide rail. The driving device includes a motor, and the motor is connected to the mounting frame through a motor fixing seat. The motor output shaft is connected to a precision adjustment screw through a coupling, and the precision adjustment screw is threadedly connected to a nut, and the nut is fixedly connected to the mounting base.

7. The plastic packaging mold cleaning device according to claim 1, characterized in that: The cross section of the mounting frame is in the shape of a flat strip.

8. The plastic packaging mold cleaning device according to claim 1, characterized in that: The mounting frame is made of aluminum alloy and is provided with a plurality of weight-reducing holes.

9. The plastic packaging mold cleaning device according to claim 4, characterized in that: It also includes a controller, and the distance measuring module, the driving device, the laser emitting module and the air pump are all connected to the controller signal.

10. A method for using the plastic packaging mold cleaning device according to any one of claims 1 to 9, characterized in that: When the plastic encapsulation mold needs to be cleaned, the plastic encapsulation mold cleaning device receives the instruction and approaches the plastic encapsulation mold to be cleaned. After reaching the specified position, one end of the mounting frame equipped with the reflection module extends into the opened plastic encapsulation mold; the ranging module measures the distance from the light outlet of the mounting frame to the mold surface, and adjusts the position of the focusing module on the mounting frame according to the detected distance by controlling the driving device, thereby changing the focusing position of the laser emitted by the laser emitting module, so that the focused laser can be accurately irradiated on the surface of the mold to be cleaned through the reflection module, thereby achieving the cleaning of the mold surface.

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