Safety air bag shell injection molding device and injection molding method thereof

Abstract

The invention discloses an air bag shell injection molding device and an injection molding method thereof, and relates to the technical field of injection molding devices. Comprising an injection mold part, a feeding heating part is installed on the injection mold part, and the feeding heating part is used for preventing clamping stagnation; a closed mounting piece is mounted on the feeding heating piece; the closed mounting piece is positioned above the injection mold piece; an air pressure control piece is mounted on the closed mounting piece; the air pressure control piece is used for detecting injection material leakage; an elastic sealing piece is mounted on the sealing mounting piece; a heating switch is adopted, so that when the lower mold and the upper mold are separated and need to be demolded, only possible flashes can be heated and softened in a heating mode, and clamping stagnation damage can be avoided when the air bag shell is demolded; the problems that according to an existing safety air bag shell injection molding device, heating is not convenient to automatically control to prevent clamping stagnation, and meanwhile grouting leakage and gun head deviation are not convenient to detect in real time are solved.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, specifically to an airbag shell injection molding device and its injection molding method. Background Technology

[0002] The airbag housing, also known as the horn-pressing housing on the steering wheel, has a bowl-shaped structure and is typically manufactured using injection molding. The quality of this injection molding is crucial. During injection molding, the airbag housing needs precise alignment with the injection gun; otherwise, leakage is likely. Current airbag housing injection molding devices, after aligning with the injection gun, are prone to flash if the gun doesn't fully fit the injection port. This can cause jamming during subsequent demolding, hindering automatic heating to prevent jamming. It also makes it difficult to detect injection leakage and gun head misalignment in real time. Leaks caused by wear or misalignment of the injection gun directly affect subsequent injection pressure and injection integrity, leading to problems such as partial defects. Furthermore, it's difficult to automatically stop injection, resulting in waste.

[0003] Therefore, we propose an airbag shell injection molding device and its injection molding method. Summary of the Invention

[0004] The purpose of this invention is to provide an airbag shell injection molding device and injection method, so as to solve the problems mentioned in the background art that the current airbag shell injection molding devices are not convenient for automatic control of heating and anti-jamming, and are also not convenient for real-time detection of grout leakage and gun head deviation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an airbag shell injection molding device, comprising an injection mold component, wherein a feeding heating element is installed on the injection mold component for preventing jamming; a sealing mounting element is installed on the feeding heating element; the sealing mounting element is located above the injection mold component; a pressure control element is installed on the sealing mounting element for detecting injection leakage; an elastic sealing element is installed on the sealing mounting element; a gun head detection element is installed on the sealing mounting element for detecting gun head deviation; the injection mold component includes: a lower mold, hydraulic cylinders, and an upper mold, wherein the lower mold has four through slots; the output shaft of the hydraulic cylinder is fixedly installed on the lower mold by bolts; the upper mold is fixedly installed on the four hydraulic cylinders; the upper mold is aligned with the lower mold; the upper mold has a molding cavity; and the upper mold has four through holes.

[0006] Preferably, the injection mold component further includes: two electric ejector rods for demolding, which are respectively fixedly installed on the upper mold; the output shafts of the two electric ejector rods are respectively flush with the molding cavity inside the upper mold.

[0007] Preferably, the injection mold component further includes: a buzzer, a heating switch, a molding core mold, and a lower electric push rod. The molding core mold is fixedly mounted on the lower mold by bolts. The lower electric push rod is fixedly mounted on the inner side of the molding core mold, and the output shaft end of the lower electric push rod is flush with the top of the molding core mold. A buzzer is fixedly mounted on the upper mold. The heating switch is fixedly mounted on the lower mold, and the upper mold is used to press down the heating switch. The output shaft of the lower electric push rod is aligned with the middle of the upper mold.

[0008] Preferably, the feeding heating element includes: a filling port and an electric heating wire, the filling port being fixedly installed on the upper mold; the filling port is connected to the molding cavity inside the upper mold; an electric heating wire is fixedly embedded at the top of the filling port, and the electric heating wire is used to prevent plastic leakage and block demolding; the heating switch is electrically connected to the electric heating wire.

[0009] Preferably, the sealing installation component includes: a sealing cylinder and a detection hole, wherein the sealing cylinder is threadedly connected to the injection port; the detection hole is provided on the side of the sealing cylinder; and the detection hole passes through the sealing cylinder.

[0010] Preferably, the pneumatic control component includes: a pneumatic control cylinder and a piston rod, wherein the pneumatic control cylinder is threadedly connected to the closed cylinder; the tail end of the pneumatic control cylinder is provided with a through hole; the pneumatic control cylinder communicates with a detection hole; the pneumatic control cylinder is slidably sleeved inside the piston rod; a spring is sleeved inside the pneumatic control cylinder, and the spring inside the pneumatic control cylinder is connected between the pneumatic control cylinder and the piston rod.

[0011] Preferably, the pneumatic control component further includes: a control switch, which is fixedly installed inside the pneumatic control cylinder and aligned with the tail of the piston column; the control switch is electrically connected to a buzzer.

[0012] Preferably, the elastic closure includes: a sealing rubber sleeve and a cleaning sponge, wherein the sealing rubber sleeve is fixedly installed on the sealing cylinder; the interior of the sealing rubber sleeve is hollow; and the cleaning sponge is fixedly installed on the sealing rubber sleeve, and the cleaning sponge is used to clean the injection gun head.

[0013] Preferably, the gun head detection component includes: a gun head cover and a contact ring, wherein the gun head cover has a through hole in the middle; the gun head cover is threaded onto a closed cylinder; the top of the gun head cover has a hexagonal column; a contact ring is fixedly installed on the inner side of the gun head cover; the gun head detection component further includes: a detection mounting ring and a detection spring, wherein the detection mounting ring is fixedly installed on the inner side of the gun head cover; a ring of detection springs is fixedly installed on the inner side of the detection mounting ring, and each ring of detection springs is a bent steel sheet structure; a gap is provided between the end of the detection spring and the contact ring; the detection mounting ring and the contact ring are electrically connected to conduct a buzzer.

[0014] An airbag shell injection molding method: 1) The four through slots on the lower mold and the four through holes on the upper mold are respectively installed on the injection molding machine by bolts; 2) Control the injection molding machine to push the lower mold and upper mold to close. During the process, control the hydraulic cylinder to retract and adapt. When injection molding is required, the injection gun is connected to the injection port to complete the injection. After cooling, the mold is demolded.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a heating switch to automatically control the heating of the upper surface of the injection port when the lower and upper molds are separated and demolding is required. This can effectively prevent the upper surface of the injection port from being stuck due to poor fit with the injection gun when it is connected to the injection gun. By heating, only the possible flash is softened, which can prevent jamming and damage when the airbag shell is demolded, thus ensuring the quality of injection molding.

[0016] The use of elastic sealing components in conjunction with pneumatic control components facilitates the detection of plastic leaks during injection molding. This prevents leaks caused by poor contact between the injection gun and the injection port from going undetected, ensuring the quality of the airbag shell injection molding, preventing material shortages and increasing the defect rate. Automatic control is possible, eliminating the need for manual inspection each time. The gun head detection component checks the concentricity between the injection gun and the injection port, maintaining the injection gun's alignment accuracy. If the injection gun's end shifts downwards due to prolonged use, causing misalignment between the gun and the injection port, it can be quickly detected, and a buzzer will sound a timely alert. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an airbag shell injection molding device and its injection molding method according to the present invention; Figure 2 This is a cross-sectional view of an airbag shell injection molding device, injection molding method, and injection gun position according to the present invention. Figure 3 This is a schematic diagram of the installation position of the pneumatic control component of the present invention; Figure 4 This is a schematic diagram of the injection mold component structure of the present invention; Figure 5 For the present invention Figure 2 Enlarged view of the structure of region D in the middle; Figure 6 This is a schematic diagram showing the installation position of the demolding electric push rod of the present invention; Figure 7 This is a schematic diagram of the enclosed mounting component structure of the present invention; Figure 8 For the present invention Figure 4 Enlarged view of the structure of the G region; Figure 9 For the present invention Figure 4Enlarged view of the structure of region H in the middle.

[0018] In the diagram: 1. Injection mold components; 101. Lower mold; 1011. Buzzer; 1012. Heating switch; 102. Hydraulic cylinder; 103. Upper mold; 104. Ejection electric push rod; 105. Molding core mold; 106. Lower electric push rod; 2. Feed heating component; 201. Injection port; 202. Electric heating wire; 3. Sealing mounting component; 301. Sealing cylinder; 3011. Detection hole; 4. Pneumatic control component; 401. Pneumatic control cylinder; 402. Piston column; 403. Control switch; 5. Elastic sealing component; 501. Sealing rubber sleeve; 502. Cleaning sponge; 6. Gun head detection component; 601. Gun head cover; 602. Electrical contact ring; 603. Detection mounting ring; 604. Detection spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 to 9 As shown: This invention provides a technical solution: an airbag shell injection molding device, including an injection mold part 1, a feeding heating element 2 installed on the injection mold part 1 for preventing jamming; a sealing mounting element 3 installed on the feeding heating element 2; the sealing mounting element 3 is located above the injection mold part 1; a pressure control element 4 installed on the sealing mounting element 3 for detecting injection leakage; an elastic sealing element 5 installed on the sealing mounting element 3; a gun head detection element 6 installed on the sealing mounting element 3 for detecting gun head deviation; the injection mold part 1 includes: a lower mold 101, a hydraulic cylinder 102 and an upper mold 103, the lower mold 101 is provided with four through slots; the output shaft of the hydraulic cylinder 102 is fixedly installed on the lower mold 101 by bolts; the upper mold 103 is fixedly installed on the four hydraulic cylinders 102; the upper mold 103 is aligned with the lower mold 101; the upper mold 103 is provided with a molding cavity; the upper mold 103 is provided with four through holes.

[0021] The injection mold component 1 further includes: two demolding electric push rods 104, which are respectively fixedly installed on the upper mold 103; the output shafts of the two demolding electric push rods 104 are flush with the molding cavity inside the upper mold 103; the injection mold component 1 also includes: a buzzer 1011, a heating switch 1012, a molding core mold 105, and a lower electric push rod 106, the molding core mold 105 is fixedly installed on the lower mold 101 by bolts; the lower electric push rod 106 is fixedly installed inside the molding core mold 105. A push rod 106 is provided, with the output shaft end of the lower electric push rod 106 flush with the top of the forming core mold 105; a buzzer 1011 is fixedly installed on the upper mold 103; a heating switch 1012 is fixedly installed on the lower mold 101, and the upper mold 103 is used to press down the heating switch 1012; the output shaft of the lower electric push rod 106 is aligned with the middle of the upper mold 103; the lower electric push rod 106 is provided with an independent switch; the feeding heating element 2 includes: a filling port 201 and an electric heating wire 202, the filling port 201 is fixedly installed on the upper mold 103; the filling port 201 is connected to... The upper mold 103 has an inner molding cavity; an electric heating wire 202 is fixedly embedded at the top of the injection port 201, and the electric heating wire 202 is used to prevent plastic leakage and block demolding; the heating switch 1012 is electrically connected to the electric heating wire 202. The use of the feeding heating element 2 facilitates the fitting and docking of the injection gun for injection molding. At the same time, the heating switch 1012 can automatically control the heating of the upper surface of the injection port 201 when the lower mold 101 and the upper mold 103 are separated and demolding is required. This can effectively prevent the upper surface of the injection port 201 from contacting the injection gun during docking. Poor fit can cause flash, which can lead to jamming during demolding. This can be addressed by heating only the flash that may be present, thus preventing jamming damage during demolding of the airbag shell and ensuring injection molding quality. The operation is simple and flexible. When the lower mold 101 and the upper mold 103 separate, the upper mold 103 will not press down the heating switch 1012. The heating switch 1012 can then control the electric heating wire 202 to be energized. If there is flash at the top of the injection port 201, it can be softened by heating without affecting demolding.

[0022] The sealing installation component 3 includes a sealing cylinder 301 and a detection hole 3011. The sealing cylinder 301 is threadedly connected to the injection port 201. The detection hole 3011 is provided on the side of the sealing cylinder 301 and passes through the sealing cylinder 301. The air pressure control component 4 includes an air pressure control cylinder 401 and a piston rod 402. The air pressure control cylinder 401 is threadedly connected to the sealing cylinder 301. The air pressure control cylinder 401 has a through hole at its tail end and communicates with the detection hole 3011. The interior of the air pressure control cylinder 401... The pneumatic control cylinder 401 is slidably sleeved inside the piston rod 402; a spring is sleeved inside the pneumatic control cylinder 401, and the spring inside the pneumatic control cylinder 401 is connected between the pneumatic control cylinder 401 and the piston rod 402; the pneumatic control component 4 also includes: a control switch 403, which is fixedly installed inside the pneumatic control cylinder 401 and aligned with the tail of the piston rod 402; the control switch 403 is electrically connected to the buzzer 1011; the elastic sealing component 5 includes: a sealing rubber sleeve 501 and a cleaning sponge 502. A closed rubber sleeve 501 is fixedly installed on a closed cylinder 301; the closed rubber sleeve 501 has a hollow internal structure; a cleaning sponge 502 is fixedly installed on the closed rubber sleeve 501, and the cleaning sponge 502 is used to clean the injection gun head. The use of an elastic sealing element 5 in conjunction with a pneumatic control element 4 facilitates the detection of plastic leakage during injection molding, preventing leaks caused by poor contact between the injection gun and the injection port 201 from going undetected, ensuring the injection molding quality of the airbag shell, preventing material shortages and increasing the defect rate, and achieving [the desired effect]. The system is now automatically controlled, eliminating the need for manual observation. The leakage detection method of this structure is simple and intuitive, ensuring that the injection pressure of the injection gun is concentrated between the lower mold 101 and the upper mold 103. When the injection molding machine controls the injection gun to move and connect with the injection port 201, the injection gun will be fitted with a sealing rubber sleeve 501 for elastic fit and sealing. At the same time, the cleaning sponge 502 also plays the role of cleaning the injection gun. As the injection process proceeds, once a leakage occurs, it will push the piston column 402 to move and squeeze the control switch 403, controlling the buzzer 1011 to sound as a warning.

[0023] Example 2, based on Example 1, the gun head detection component 6 includes: a gun head cover 601 and a contact ring 602. The gun head cover 601 has a through hole in the middle; the gun head cover 601 is threaded onto the closed cylinder 301; a hexagonal column is provided on the top of the gun head cover 601; the contact ring 602 is fixedly installed on the inner side of the gun head cover 601; the gun head detection component 6 also includes: a detection mounting ring 603 and a detection spring 604. The detection mounting ring 603 is fixedly installed on the inner side of the gun head cover 601; a ring of detection springs 604 is fixedly installed on the inner side of the detection mounting ring 603, and each ring of detection springs 604 is a bent steel sheet structure; detection A gap is provided between the end of the spring piece 604 and the electrical contact ring 602; the detection mounting ring 603 and the electrical contact ring 602 are electrically connected to the buzzer 1011. The gun head detection component 6 can detect the concentricity between the injection gun and the injection port 201, maintaining the injection gun docking accuracy. Once the end of the injection gun shifts downward due to long-term use, causing the injection gun and the injection port 201 to become out of concentricity, it can be quickly detected and the buzzer 1011 can be controlled to promptly alert the operator, allowing them to temporarily stop the injection process and further prevent unnecessary waste. At the same time, this structure is simple and direct to detect, which can further ensure the docking accuracy of the injection gun.

[0024] An airbag shell injection molding method: 1) The four through slots on the lower mold 101 and the four through holes on the upper mold 103 are respectively installed on the injection molding machine by bolts; 2) Control the injection molding machine to push the lower mold 101 and the upper mold 103 to close. During the process, control the hydraulic cylinder 102 to also retract and adapt. When injection molding is required, the injection gun is connected to the injection port 201 to complete the injection. After cooling, the mold is demolded.

[0025] The working principle of this embodiment is as follows: First, the four through slots on the lower mold 101 and the four through holes on the upper mold 103 are respectively installed on the injection molding machine by bolts. The injection molding machine is controlled to push the lower mold 101 and the upper mold 103 to close. During the process, the hydraulic cylinder 102 also retracts to adapt. When injection molding is required, the injection gun is connected to the injection port 201. After injection is completed and cooling is required, when demolding is needed, the injection molding machine can be controlled to separate the mold. During the process, the hydraulic cylinder 102 also extends to assist in separating the lower mold 101 and the upper mold 103. During the process, the upper mold 103 will not press down the heating switch 1012. The heating switch 1012 can control the electric heating wire 202 to be energized and heated. If there is flash on the top of the injection port 201, it can be softened by heating and will not affect demolding. At the same time, the output shaft of the demolding electric push rod 104 or the lower electric push rod 106 can be controlled to extend to assist in pushing the formed airbag shell to demold. When the injection gun moves to align with the injection port 201, it will be fitted with a sealing rubber sleeve 501 for elastic sealing. Simultaneously, the cleaning sponge 502 also cleans the injection gun. As injection proceeds, if leakage occurs, the leaking molten plastic will be squeezed into the pneumatic control cylinder 401 through the detection hole 3011. This will push the piston column 402 to move and compress the spring at the tail. When the piston column 402 is pushed by the molten plastic, it will compress the control switch 403. When the control switch 403 is compressed, the buzzer 1011 will sound quickly. When the injection gun moves to insert into the sealing rubber sleeve 501, it will also pass through a detection spring 604. If the injection gun and the injection port 201 are not concentric, the injection gun will compress the detection spring 604, causing a portion of the detection spring 604 to be compressed and adhere to the electrical coil 602, thus activating the buzzer 1011 and sounding an alarm. At this point, the operator can pause the injection process.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airbag shell injection molding device, comprising an injection mold (1), wherein a feeding heating element (2) is mounted on the injection mold (1), characterized in that: The feeding heating element (2) is used to prevent jamming; a sealing mounting element (3) is installed on the feeding heating element (2); the sealing mounting element (3) is located above the injection mold part (1); A pressure control component (4) is installed on the sealed mounting component (3); the pressure control component (4) is used to detect injection leakage; An elastic sealing member (5) is installed on the sealing mounting member (3); a gun head detection member (6) is installed on the sealing mounting member (3); the gun head detection member (6) is used to detect gun head deviation; The injection mold component (1) includes: a lower mold (101), a hydraulic cylinder (102) and an upper mold (103). The lower mold (101) is provided with four through slots. The output shaft of the hydraulic cylinder (102) is fixedly installed on the lower mold (101) by bolts. The upper mold (103) is fixedly installed on the four hydraulic cylinders (102). The upper mold (103) is aligned with the lower mold (101). The upper mold (103) is provided with a molding cavity. The upper mold (103) is provided with four through holes.

2. The airbag shell injection molding device according to claim 1, characterized in that: The injection mold component (1) further includes: demolding electric push rod (104), there are two demolding electric push rods (104), and the two demolding electric push rods (104) are respectively fixedly installed on the upper mold (103); the output shafts of the two demolding electric push rods (104) are respectively flush with the molding cavity inside the upper mold (103).

3. The airbag shell injection molding device according to claim 2, characterized in that: The injection mold component (1) further includes: a buzzer (1011), a heating switch (1012), a molding core mold (105), and a lower electric push rod (106). The molding core mold (105) is fixedly installed on the lower mold (101) by bolts. The lower electric push rod (106) is fixedly installed on the inner side of the molding core mold (105), and the output shaft end of the lower electric push rod (106) is flush with the top of the molding core mold (105). The buzzer (1011) is fixedly installed on the upper mold (103). The heating switch (1012) is fixedly installed on the lower mold (101), and the upper mold (103) is used to press down the heating switch (1012). The output shaft of the lower electric push rod (106) is aligned with the middle of the upper mold (103).

4. The airbag shell injection molding device according to claim 3, characterized in that: The feeding heating element (2) includes: a filling port (201) and an electric heating wire (202). The filling port (201) is fixedly installed on the upper mold (103). The filling port (201) is connected to the molding cavity inside the upper mold (103). The top of the filling port (201) is fixedly embedded with an electric heating wire (202), and the electric heating wire (202) is used to prevent plastic leakage and block demolding. The heating switch (1012) is electrically connected to the electric heating wire (202).

5. The airbag shell injection molding device according to claim 4, characterized in that: The sealing installation component (3) includes: a sealing cylinder (301) and a detection hole (3011). The sealing cylinder (301) is threadedly connected to the injection port (201). The sealing cylinder (301) has a detection hole (3011) on its side. The detection hole (3011) passes through the sealing cylinder (301).

6. The airbag shell injection molding device according to claim 5, characterized in that: The pneumatic control component (4) includes: a pneumatic control cylinder (401) and a piston rod (402). The pneumatic control cylinder (401) is threadedly connected to the closed cylinder (301). The tail of the pneumatic control cylinder (401) is provided with a through hole. The pneumatic control cylinder (401) is connected to the detection hole (3011). The pneumatic control cylinder (401) is slidably sleeved inside the piston rod (402). A spring is sleeved inside the pneumatic control cylinder (401), and the spring inside the pneumatic control cylinder (401) is connected between the pneumatic control cylinder (401) and the piston rod (402).

7. The airbag shell injection molding device according to claim 6, characterized in that: The pneumatic control component (4) further includes a control switch (403), which is fixedly installed inside the pneumatic control cylinder (401) and aligned with the tail of the piston column (402); the control switch (403) is electrically connected to a buzzer (1011).

8. The airbag shell injection molding device according to claim 5, characterized in that: The elastic sealing component (5) includes: a sealing rubber sleeve (501) and a cleaning sponge (502). The sealing rubber sleeve (501) is fixedly installed on the sealing cylinder (301). The sealing rubber sleeve (501) has a hollow structure inside. The cleaning sponge (502) is fixedly installed on the sealing rubber sleeve (501) and is used to clean the injection gun head.

9. The airbag shell injection molding device according to claim 5, characterized in that: The gun head detection component (6) includes: a gun head cover (601) and a contact ring (602). The gun head cover (601) has a through hole in the middle. The gun head cover (601) is threaded onto the closed cylinder (301). The top of the gun head cover (601) has a hexagonal column. The contact ring (602) is fixedly installed on the inner side of the gun head cover (601). The gun head detection component (6) also includes: a detection mounting ring (603) and a detection spring (604). The detection mounting ring (603) is fixedly installed on the inner side of the gun head cover (601). A ring of detection springs (604) is fixedly installed on the inner side of the detection mounting ring (603), and each ring of detection springs (604) is a bent steel sheet structure. There is a gap between the end of the detection spring (604) and the contact ring (602). The detection mounting ring (603) and the contact ring (602) are electrically connected to conduct a buzzer (1011).

10. A method for injection molding an airbag shell, using an airbag shell injection molding device and method as described in claim 3, characterized in that: The steps include: 1) The four through slots on the lower mold (101) and the four through holes on the upper mold (103) are respectively installed on the injection molding machine by bolts; 2) Control the injection molding machine to push the lower mold (101) and upper mold (103) to close the mold. During the process, control the hydraulic cylinder (102) to also shrink and adapt. When injection molding is required, the injection gun is connected to the injection port (201) to complete the injection. After cooling, the mold is demolded.

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