An injection molding part flash removal device and removal process

Abstract

The present invention relates to an injection molded part flash removal device, which includes a device box body, a temperature control and heat conduction component connected to the device box body, and a blowing component; the temperature control and heat conduction component includes a heat conductor and a thermostat for controlling and adjusting the temperature of the heat conductor; the blowing component includes a blowing device and an air inlet flow channel, the end of the air inlet flow channel extends into the heat conductor, and a plurality of air blowing holes for blowing out high-temperature gas are arranged between the end of the air inlet flow channel and the upper end surface of the heat conductor; also developed is an injection molded part flash removal process, which controls the distance between the injection molded part and the heat conductor, the temperature control range of the heat conductor, the ventilation pressure of the air inlet flow channel, and the residence time of the injection molded part, so as to realize the removal of the flash of the injection molded part, avoid the disadvantages of the traditional flash removal method, effectively improve the work efficiency, and will not affect the quality of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of removing flash from injection molded parts, and particularly to an apparatus and process for removing flash from injection molded parts. Background Art

[0002] After an injection molded part is injection molded, flash is likely to remain around it. To improve the quality and service life of the injection molded part, the deburring process is very important. Currently, the common methods for removing flash are as follows:

[0003] (1) Manual peeling, which is time-consuming and laborious, and has low work efficiency;

[0004] (2) Freezing method, which makes the rubber hard and brittle at low temperature, and then applies external forces such as friction, impact, and vibration to the finished product to remove the flash. However, low temperature is likely to cause qualitative changes in the rubber, affecting the quality;

[0005] (3) Air-powered trimming method, in a closed space, a special air flow is generated to make multiple rubber products impact and rub against each other, so that the surrounding flash can be smoothly peeled off. This method is similar to manual peeling and does not cause qualitative changes in the rubber, and is generally accepted by manufacturers. However, the work efficiency is also relatively low.

[0006] Therefore, the present invention has developed an apparatus and process for removing flash from injection molded parts to solve the problems existing in the prior art. After retrieval, no technical solutions identical or similar to the present invention have been found. Summary of the Invention

[0007] The object of the present invention is to provide an apparatus and process for removing flash from injection molded parts to solve the problems of low efficiency in removing flash from injection molded parts and easy influence on product quality during the deburring process in the prior art.

[0008] The technical solution of the present invention is: an apparatus for removing flash from injection molded parts, including an equipment box body, a temperature control and heat conduction component connected to the equipment box body, and a blowing component; the temperature control and heat conduction component includes a heat conductor and a temperature controller for controlling and adjusting the temperature of the heat conductor; the blowing component includes a blowing device and an air inlet flow channel, and the end of the air inlet flow channel extends into the heat conductor, and there are a number of air blowing holes for blowing high-temperature gas between the end of the air inlet flow channel and the upper end surface of the heat conductor.

[0009] Preferably, an electric heating tube is nested inside the heat conductor, an electric heating wire is arranged inside the electric heating tube, and the temperature controller is connected with a temperature control plug for being electrically connected with the electric heating wire and heating the heat conductor.

[0010] Preferably, the air blowing holes are distributed on the upper end surface of the heat conductor and are communicated with the air inlet flow channel, and the shape formed by the air blowing holes corresponding to a single injection molded part or their own shape is the same as the outer contour shape of the injection molded part.

[0011] Preferably, the intake air flow channel includes a main flow channel and a plurality of branch flow channels distributed inside the heat conducting body. The main flow channel is connected to the branch flow channels and is connected through an intake pipe, and the air blowing holes are respectively arranged at the ends of the branch flow channels.

[0012] Preferably, a temperature sensing wire for monitoring the blowing temperature is arranged at the branch flow channel.

[0013] Preferably, a solenoid valve for controlling the on / off of the intake air flow channel and a pressure valve for controlling the ventilation size are arranged at the intake air flow channel.

[0014] Preferably, an integrated controller for controlling the temperature control heat conducting component and the air blowing component is further arranged outside the equipment box body, and the integrated controller is electrically connected to the solenoid valve, the pressure valve and the temperature controller respectively.

[0015] Based on the above-mentioned injection molded part flash removal equipment, the present invention has also developed an injection molded part flash removal process, and the specific process steps are as follows:

[0016] (1) Sampling of injection molded part products:

[0017] After the injection molded part is injection molded by an injection molding machine, it is clamped and taken out by a manipulator, and then transferred above the heat conducting body and arranged to be vertically aligned with the corresponding air blowing holes. The distance between the lower end surface of the injection molded part and the upper end surface of the heat conducting body is controlled to be 10 - 35 mm;

[0018] (2) Start of the temperature control heat conducting component:

[0019] After the injection molded part is taken out of the injection molding machine in step (1), the injection molding machine sends a take-out signal to the integrated controller. At this time, the integrated controller starts to work and controls the temperature control heat conducting component to start working, and the temperature of the heat conducting body is kept constant at 500 - 700 °C;

[0020] (3) Start of the air blowing component:

[0021] After the injection molded part is aligned and placed above the heat conducting body in step (1), the solenoid valve is opened, and the pressure valve controls the ventilation pressure of the intake air flow channel to be 0.5 - 3 Pa;

[0022] (4) Flash removal:

[0023] The gas in the intake air flow channel is blown out from the air blowing holes after being heated by the heat conducting body, and the flash at the outer edge contour of the injection molded part is removed. The residence time of the injection molded part above the heat conducting body is 0.5 - 4 s.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] (1) The burr removal device for injection molded parts mainly consists of a temperature control and heat conduction component and a blowing component. The heat conduction component heats up the blown gas, so that the burrs at the contour of the injection molded parts can be quickly removed under the blowing of the high-temperature gas, avoiding the drawbacks of traditional burr removal methods, effectively improving work efficiency, and having no impact on the product quality.

[0026] (2) The burr removal process for injection molded parts mainly focuses on reasonably controlling the placement distance of injection molded parts, the temperature control range of the heat conductor, the ventilation pressure of the air inlet flow channel, and the residence time of injection molded parts. These are all effective parameters affecting the burr removal of injection molded parts, and effective burr removal is achieved through reasonable parameter control. Description of the Drawings

[0027] The present invention will be further described below in conjunction with the drawings and embodiments:

[0028] Figure 1 It is the top view of a burr removal device for injection molded parts according to the present invention;

[0029] Figure 2 It is the front view of a burr removal device for injection molded parts according to the present invention;

[0030] Figure 3 It is the schematic diagram of the distribution structure of the electric heating tube in the heat conductor according to the present invention;

[0031] Figure 4 It is the schematic diagram of the distribution structure of the air inlet flow channel in the heat conductor in Embodiment 1 of the present invention;

[0032] Figure 5 It is the enlarged partial structure diagram of the heat conductor according to the present invention and the circuit diagram of the air inlet flow channel ventilating to the air blowing holes;

[0033] Figure 6 It is the control principle diagram of a burr removal device for injection molded parts according to the present invention;

[0034] Figure 7 It is the schematic diagram of the distribution structure of the air inlet flow channel in the heat conductor in Embodiment 2 of the present invention;

[0035] Figure 8 It is the schematic diagram of the distribution structure of the air inlet flow channel in the heat conductor in Embodiment 3 of the present invention.

[0036] Among them: 1. Equipment box body, 2. Heat conductor, 3. Electric heating tube, 4. Electric heating wire, 5. Temperature controller, 6. Temperature control plug, 7. Air inlet flow channel, 8. Solenoid valve, 9. Pressure valve, 10. Temperature sensing wire, 11. Main flow channel, 12. Branch flow channel, 13. Air blowing hole, 14. Integrated controller, 15. Injection molding machine, 16. Air inlet pipe. Detailed Embodiments

[0037] The following further elaborates on the content of the present invention in conjunction with specific embodiments:

[0038] As Figure 1 and Figure 2 shown, a device for removing flash from injection molded parts includes a device box body 1, a temperature control and heat conduction component connected to the device box body 1, and a blowing component.

[0039] The temperature control and heat conduction component includes a heat conductor 2 and a thermostat 5 for controlling and regulating the temperature of the heat conductor 2; the heat conductor 2 is installed at the upper end of the device box body 1. As Figure 3 shown, an electric heating tube 3 is nested inside, and an electric heating wire 4 is arranged inside the electric heating tube 3. The thermostat 5 is connected with a temperature control plug 6 for being electrically connected to the electric heating wire 4 and heating the heat conductor 2.

[0040] The blowing component includes a blowing device and an air inlet flow channel 7. The blowing device is externally arranged. Since it belongs to the prior art, the present invention does not elaborate on the blowing device; as Figure 4 and Figure 5 shown, the end of the air inlet flow channel 7 extends into the heat conductor 2, and there are a number of air blowing holes 13 for blowing out high-temperature gas between the end of the air inlet flow channel 7 and the upper end face of the heat conductor 2. The air blowing holes 13 are distributed on the upper end face of the heat conductor 2 and are connected to the air inlet flow channel 7. The shape formed by the air blowing holes 13 corresponding to a single injection molded part or their own shape is the same as the outer contour shape of the injection molded part; more specifically, the air inlet flow channel 7 includes a main flow channel 11 and a number of branch flow channels 12 distributed inside the heat conductor 2. The main flow channel 11 is connected to the branch flow channels 12 and is connected through an air inlet pipe 16. The air blowing holes 13 are respectively arranged at the ends of the branch flow channels 12; a temperature sensing wire 10 for monitoring the blowing temperature is arranged at the branch flow channels 12.

[0041] Combined with Figure 6 shown, for the convenience of device control, an electromagnetic valve 8 for controlling the on / off of the air inlet flow channel 7 and a pressure valve 9 for controlling the air flow size are arranged at the air inlet flow channel 7. An integrated controller 14 for controlling the temperature control and heat conduction component and the blowing component is also arranged outside the device box body 1. The integrated controller 14 is electrically connected to the electromagnetic valve 8, the pressure valve 9, and the thermostat 5 respectively, and is connected to an injection molding machine 15 for manufacturing injection molded parts. When the injection molded part in the injection molding machine 15 is taken out, a signal is sent to the integrated controller 14, so that the integrated controller 14 starts to work.

[0042] The present invention can be used for deburring products of different specifications. At this time, the heat conductor 2 needs to be matched according to different injection molded part products. Now, according to the types of injection molded part products, the following embodiments are provided for the specifications of the heat conductor 2:

[0043] Embodiment 1:

[0044] As shown Figure 4 in the figure, it is used to remove the burrs of laptop foot pads of two specifications (round and waist-shaped). There are sixteen cavities in one mold, eight of which correspond to round foot pads and the other eight correspond to waist-shaped foot pads. The diameter of the round foot pad is 20 mm and the thickness is 2 mm. A number of air blowing holes are arranged to form a circle with the same shape as the outer contour of the round foot pad. The burrs are removed by blowing air simultaneously along the outer contour through a number of air blowing holes; the distance between the parallel sides of the waist-shaped foot pad is 8 mm, the distance at the apex of the arc side is 25 mm, and the thickness is 2 mm. It belongs to a slender structure and it is impossible to effectively distribute a number of air blowing holes along the outer contour shape. Therefore, only one air blowing hole is arranged and it has the same shape as the waist-shaped foot pad. The burrs are removed by blowing air through a single air blowing hole.

[0045] Example 2:

[0046] As shown Figure 7 in the figure, it is used to remove the burrs of laptop foot pads of one specification (round). There are sixteen cavities in one mold. The diameter of the round foot pad is 20 mm and the thickness is 2 mm. A number of air blowing holes are arranged to form a circle with the same shape as the outer contour of the round foot pad. The burrs are removed by blowing air simultaneously along the outer contour through a number of air blowing holes.

[0047] Example 3:

[0048] As shown Figure 8 in the figure, it is used to remove the burrs of laptop foot pads of one specification (long strip). There are four cavities in one mold. The length of the long strip foot pad is 400 mm, the width is 8 mm, and the thickness is 2 mm. It belongs to a slender structure. Therefore, only one air blowing hole is arranged and it has the same shape as the long strip foot pad. The burrs are removed by blowing air through a single air blowing hole.

[0049] Based on the above-mentioned burr removal equipment for injection molded parts, the present invention has also developed a burr removal process for injection molded parts. The specific process steps are as follows:

[0050] (1) Sampling of injection molded part products:

[0051] After the injection molded part is injection molded by an injection molding machine, it is clamped and taken out by a manipulator, and then transferred above the heat conductor and aligned with the corresponding air blowing holes up and down. The distance between the lower end face of the injection molded part and the upper end face of the heat conductor is controlled to be 10 - 35 mm;

[0052] (2) Start of the temperature control heat conduction component:

[0053] After the injection molded part is taken out of the injection molding machine in step (1), the injection molding machine sends a take-out signal to the integrated controller. At this time, the integrated controller starts to work and controls the temperature control heat conduction component to start working. The temperature of the heat conductor is kept constant at 500 - 700 °C;

[0054] (3) Start-up of the air-blowing component:

[0055] After the injection-molded part is placed above the heat conductor in step (1), the solenoid valve is opened, and the pressure valve controls the ventilation pressure of the air inlet channel to be 0.5 - 3 Pa.

[0056] (4) Burr removal:

[0057] The gas in the air inlet channel is blown out from the air-blowing holes after being heated by the heat conductor, and the burrs at the outer edge contour of the injection-molded part are removed. The residence time of the injection-molded part above the heat conductor is 0.5 - 4 s.

[0058] For products of different specifications, their effective parameters: the placement distance of the injection-molded part, the temperature control range of the heat conductor, the ventilation pressure of the air inlet channel, and the residence time of the injection-molded part are different within a reasonable range. Now, according to the types of injection-molded part products, the following specific embodiments are provided:

[0059] Embodiment 1: (Taking a circular foot mat with a diameter of 20 mm and a thickness of 2 mm, and a kidney-shaped foot mat with a distance between parallel sides of 8 mm, a distance at the top corner of the arc side of 25 mm, and a thickness of 2 mm as examples)

[0060] After the injection-molded part is injection-molded by an injection molding machine, it is clamped and taken out by a manipulator. At this time, the injection molding machine sends a take-out signal to the integrated controller, and the integrated controller starts to work, controlling the temperature control heat conduction component to start working, and the temperature of the heat conductor is kept constant at 520 °C; the taken-out injection-molded part is continuously transferred above the heat conductor and is respectively aligned with the corresponding air-blowing holes up and down. The distance between the lower end face of the injection-molded part and the upper end face of the heat conductor is controlled to be 18 mm; then the solenoid valve is opened, the pressure valve controls the ventilation pressure of the air inlet channel to be 1 Pa, and the residence time of the injection-molded part above the heat conductor is 1.2 s. At this time, the burr removal of the injection-molded part is completed.

[0061] Embodiment 2: (Taking a long strip foot mat with a length of 400 mm, a width of 8 mm, and a thickness of 2 mm as an example)

[0062] After the injection-molded part is injection-molded by an injection molding machine, it is clamped and taken out by a manipulator. At this time, the injection molding machine sends a take-out signal to the integrated controller, and the integrated controller starts to work, controlling the temperature control heat conduction component to start working, and the temperature of the heat conductor is kept constant at 550 °C; the taken-out injection-molded part is continuously transferred above the heat conductor and is respectively aligned with the corresponding air-blowing holes up and down. The distance between the lower end face of the injection-molded part and the upper end face of the heat conductor is controlled to be 18 mm; then the solenoid valve is opened, the pressure valve controls the ventilation pressure of the air inlet channel to be 1 Pa, and the residence time of the injection-molded part above the heat conductor is 1 s. At this time, the burr removal of the injection-molded part is completed.

[0063] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An injection molding part flash removal device, which is used in cooperation with an injection molding machine and a manipulator, and is characterized in that: It includes an equipment box body, a temperature control and heat conduction component connected to the equipment box body, and a blowing component; the temperature control and heat conduction component includes a heat conductor and a thermostat for controlling and regulating the temperature of the heat conductor; the blowing component includes a blowing device and an air inlet flow channel, the air inlet flow channel includes a main flow channel and a number of branch flow channels distributed inside the heat conductor, the end of the air inlet flow channel extends into the heat conductor, and a number of air blowing holes for blowing out high-temperature gas are arranged between the end of the air inlet flow channel and the upper end face of the heat conductor; The air blowing holes are distributed on the upper end face of the heat conductor and are connected to the air inlet flow channel, and the shape enclosed by the air blowing holes corresponding to a single injection molded part or its own shape is the same as the outer contour shape of the injection molded part; A single injection molded part is transferred above the heat conductor under the action of the manipulator and is arranged vertically aligned with the corresponding air blowing holes, and the distance between the lower end face of the injection molded part and the upper end face of the heat conductor is controlled to be 10 - 35 mm.

2. The deburring device for injection molded parts according to claim 1, characterized in that: An electric heating tube is nested inside the heat conductor, an electric heating wire is arranged inside the electric heating tube, and the thermostat is connected with a temperature control plug for being electrically connected to the electric heating wire and heating the heat conductor.

3. An injection molding part flash removal device according to claim 1, characterized in that: The main flow channel is connected to the branch flow channels and is connected through an air inlet pipe, and the air blowing holes are respectively arranged at the ends of the branch flow channels.

4. An injection molded part burr removal device according to claim 3, characterized in that: A temperature sensing wire for monitoring the blowing temperature is arranged at the branch flow channels.

5. An injection molded part burr removal device according to claim 1, characterized in that: An electromagnetic valve for controlling the on-off of the air inlet flow channel and a pressure valve for controlling the ventilation size are arranged at the air inlet flow channel.

6. The deburring device for injection molded parts according to claim 5, characterized in that: An integrated controller for controlling the temperature control and heat conduction component and the blowing component is further arranged outside the equipment box body, and the integrated controller is electrically connected to the electromagnetic valve, the pressure valve and the thermostat respectively.

7. An injection molding part flash removal process for an injection molding part flash removal device according to any one of claims 1 to 6, characterized in that: The process steps are as follows: (1) Sampling of injection molded part products: After the injection molded part is injection molded by an injection molding machine, it is clamped and taken out by a manipulator, then transferred above the heat conductor and arranged vertically aligned with the corresponding air blowing holes, and the distance between the lower end face of the injection molded part and the upper end face of the heat conductor is controlled to be 10 - 35 mm; (2) Starting of the temperature control and heat conduction component: After the injection molded part is taken out of the injection molding machine in step (1), the injection molding machine sends a take-out signal to the integrated controller. At this time, the integrated controller starts to work and controls the temperature control and heat conduction component to start working, and the temperature of the heat conductor is kept constant at 500 - 700 °C; (3) Starting of the blowing component: After the injection molded part is placed aligned above the heat conductor in step (1), the electromagnetic valve is opened, and the pressure valve controls the ventilation pressure of the air inlet flow channel to be 0.5 - 3 Pa; (4) Burr removal: The gas in the air inlet flow channel is blown out from the air blowing holes after being heated by the heat conductor, and the burrs at the outer edge contour of the injection molded part are removed. The residence time of the injection molded part above the heat conductor is 0.5 - 4 s.

Images