Extrusion forming device for soft palate protective sleeve

Abstract

The invention provides an extrusion forming device for a soft palate protective sleeve, and relates to the technical field of extrusion forming, the extrusion forming device comprises a hydraulic actuating mechanism, a hydraulic device is arranged in the hydraulic actuating mechanism, the soft palate protective sleeve is arranged below the hydraulic actuating mechanism, an upper end mold is arranged below the hydraulic actuating mechanism, and a lower end mold is arranged below the upper end mold; the upper-end mold and the lower-end mold are combined into a complete mold, an annular ejection head is arranged below the hydraulic actuating mechanism, and a device shell is arranged below the hydraulic actuating mechanism. The hydraulic actuating mechanism and a hydraulic device inside the hydraulic actuating mechanism are arranged, and are matched with a hydraulic link rod, the upper-end mold, the lower-end mold and a mold bottom plate; a worker cleans die waste before starting the device, after starting, the hydraulic executing mechanism drives the hydraulic linkage rod to drive the upper end die and the lower end die to be closed, the feeding device in the device shell injects silica gel raw materials into a cavity through a discharging opening of the die bottom plate, and the cavity of the die is evenly filled with the raw materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of extrusion molding, and more specifically, relates to an extrusion molding device for a soft palate protective sleeve. Background Art

[0002] In the field of extrusion molding technology, the production of soft palate protective covers has high requirements for molding accuracy, demoulding convenience and cooling effect. Existing soft palate protective cover extrusion molding devices have some shortcomings in practical applications.

[0003] The current extrusion molding device has been found to have at least the following technical problems: In the field of extrusion molding, the production of soft palate protectors demands extremely high molding precision and demolding reliability. Because soft palate protectors often have irregular shapes, such as an irregular sheet-like main body with a columnar structure on the surface, and a bulged semicircular portion at the top of the columnar structure, this complex three-dimensional structural design ensures a tight fit between the mold's inner wall after molding. The bulged portion of the workpiece's columnar structure forms a barbed engagement with the upper mold wall, making demolding difficult with simple mold separation. In the field of extrusion molding technology, the cooling and forming mechanisms of traditional soft palate protector production equipment have significant design flaws. The cooling and forming chambers often use a straight-walled structure, lacking a guide design at the top. This causes the cooling airflow to easily form turbulence when it contacts the workpiece surface. This is particularly true near the columnar structure and semicircular bulge of the soft palate protector, where significant dead spots are formed due to air obstruction. Traditional devices typically rely on a single air inlet for air supply, resulting in a limited airflow coverage range, making it difficult to achieve adequate cooling at the edges of the irregular sheet-like body of the workpiece. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an extrusion molding device for a soft palate protective sleeve to solve the above problems.

[0005] A soft palate protection sleeve extrusion molding device comprises a hydraulic actuator, a hydraulic device is provided in the hydraulic actuator, a soft palate protection sleeve is provided below the hydraulic actuator, an upper end mold is provided below the hydraulic actuator, a lower end mold is provided below the upper end mold, the upper end mold and the lower end mold are combined into a complete mold, an annular ejection head is provided below the hydraulic actuator, a device shell is provided below the hydraulic actuator, a cooling and molding chamber is provided on the side of the device shell, the top of the cooling and molding chamber is arc-shaped, a workpiece ejection mechanism is provided below the hydraulic actuator, the workpiece ejection mechanism is used to eject the processed soft palate protection sleeve from the upper end mold, and can catch the ejected soft palate protection sleeve, a cooling and molding mechanism is provided in the device shell, the cooling and molding mechanism is used to bring the ejected soft palate protection sleeve into the cooling and molding chamber and fully cool it.

[0006] Preferably, the workpiece ejection mechanism includes an annular ejection head, which is fixedly installed through the hydraulic actuator, a feeding device is provided in the device housing, a mold base is fixedly installed on the device housing, the lower end mold is fixedly installed on the mold base, a discharge port is provided on the mold base, and the discharge port can be connected to the feeding device in the device housing, a hydraulic connecting rod is provided at the lower end of the hydraulic actuator, the hydraulic connecting rod is fixedly installed on the upper end of the upper end mold, an ejector rod is fixedly installed on the upper end of the annular ejection head, an annular limiting sleeve is fixedly installed below the hydraulic actuator, the upper end of the ejector rod is connected to the hydraulic device inside the hydraulic actuator, the upper end of the ejector rod is slidably installed in the annular limiting sleeve, a spring mechanism is provided in the annular limiting sleeve, and a workpiece supporting plate is provided below the upper end mold.

[0007] Preferably, the cooling and forming mechanism includes an apparatus air inlet, the apparatus air inlet is fixedly mounted on the side wall of the apparatus casing, an air guide duct is opened in the annular limiting sleeve, the apparatus air inlet is fixedly mounted on one end of the air guide duct, an air guide fan is provided at the upper end of the air guide duct, a ventilation filter plate is fixedly mounted above the air guide fan, the ventilation filter plate is fixedly mounted on the lower end of the cooling and forming chamber, guide rails are fixedly mounted on both sides of the cooling and forming chamber, servo motors are fixedly mounted in the guide rails, a screw rod is rotatably mounted on the servo motor, the screw rod is mounted in the guide rail, a slider is slidably mounted in the guide rail, a fixed block is fixedly mounted between the two sliders, a pressure sensor is provided on the fixed block, the workpiece carrying plate and the fixed block are fixedly mounted, a window is opened on the side wall of the apparatus casing, and a switch door is fixedly mounted on the window on the side wall of the apparatus casing.

[0008] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a hydraulic actuator and its internal hydraulic device are provided, and a hydraulic connecting rod, an upper mold, a lower mold and a mold base are matched. The staff cleans the mold waste before starting the device. After starting, the hydraulic actuator drives the hydraulic connecting rod to drive the upper mold and the lower mold to close. The feeding device in the device shell injects the silicone raw material into the cavity through the discharge port of the mold base, so as to achieve uniform filling of the raw material in the mold cavity, lay the foundation for the extrusion molding of the soft palate protective cover, and ensure the prerequisite for molding accuracy.

[0009] In the present invention, by providing an annular ejector head, an ejector rod, an annular limiting sleeve and a workpiece supporting plate, when the hydraulic actuator reversely drives the hydraulic connecting rod to drive the upper mold to move upward, the annular ejector head moves upward synchronously through the ejector rod, and when the upper end of the ejector rod touches the spring mechanism in the annular limiting sleeve, it is constrained to stop moving, and the upper mold continues to move upward so that the annular ejector head ejects the workpiece from the mold surface and drops it to the workpiece supporting plate, thereby realizing the smooth removal of the formed soft palate protective cover from the upper mold.

[0010] In the present invention, an apparatus is provided with an air inlet, an air duct, an air guide fan, a ventilation filter plate, a cooling and forming chamber, a guide rail, a servo motor, a screw, a slider, a fixed block and a workpiece carrier plate. When the soft palate protective cover falls onto the workpiece carrier plate, the pressure sensor on the fixed block triggers the servo motor to drive the screw to rotate, and the fixed block and the workpiece carrier plate are pushed into the cooling and forming chamber through the slider. The air guide fan draws external air through the air inlet and the air duct of the apparatus, and blows it toward the workpiece after filtering. The arc-shaped top of the cooling and forming chamber guides the airflow to circulate evenly, thereby achieving sufficient cooling of the detached soft palate protective cover, improving cooling efficiency and uniformity, and the cooling process is automated, reducing manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the annular limiting sleeve of the present invention; Figure 3 This is a schematic diagram of the hydraulic connecting rod structure of the present invention; Figure 4 2. It is a schematic structural diagram of the soft palate protective cover of the present invention; Figure 5 This is a schematic diagram of the structure of the annular ejector head of the present invention; Figure 6 Schematic diagram of the discharge port structure of the present invention; Figure 7 1. It is a schematic diagram of the screw rod structure of the present invention; Figure 8 This is a schematic diagram of the workpiece bearing plate structure of the present invention; Figure 9 2. It is a schematic diagram of the guide rail structure of the present invention; Figure 10 This is a schematic diagram of the cooling and shaping chamber structure of the present invention; Figure 11 It is a schematic diagram of the air guide duct structure of the present invention.

[0012] In the figure, the correspondence between the component names and the drawing numbers is: 1. Device housing; 2. Switch door; 3. Device air inlet; 4. Hydraulic actuator; 5. Cooling and molding chamber; 6. Mold base plate; 7. Lower end mold; 8. Upper end mold; 9. Annular ejector head; 10. Ejector rod; 11. Annular limit sleeve; 12. Soft palate protection cover; 13. Hydraulic connecting rod; 14. Guide rail; 15. Servo motor; 16. Screw; 17. Slider; 18. Fixed block; 19. Workpiece bearing plate; 20. Ventilation filter plate; 21. Air guide fan; 22. Air guide duct; 23. Discharge port. DETAILED DESCRIPTION

[0013] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0014] See also Figures 1-11 The present invention provides an extrusion molding device for a soft palate protective sleeve, including a hydraulic actuator 4, a hydraulic device is provided in the hydraulic actuator 4, a soft palate protective sleeve 12 is provided below the hydraulic actuator 4, the soft palate protective sleeve 12 is an irregular sheet, a circular protrusion is provided on the soft palate protective sleeve 12, a columnar structure is provided at one end of the soft palate protective sleeve 12, an enlarged semicircular part is provided at the upper end of the columnar structure on the soft palate protective sleeve 12, the soft palate protective sleeve 12 is a workpiece processed by the equipment, an upper end mold 8 is provided below the hydraulic actuator 4, a lower end mold 7 is provided below the upper end mold 8, the upper end mold 8 and the lower end mold 7 are combined into a complete mold, and the lower end mold 7 and the upper end mold 8 are used to pass through the combination The closed cavity formed after the mold is formed applies pressure and temperature to the internal material to shape it within the limited space. Since an enlarged semicircular part is provided on the columnar structure of the soft palate protection cover 12, the soft palate protection cover 12 will rise with the upper mold 8 during demolding. An annular ejector head 9 is provided under the hydraulic actuator 4. The annular ejector head 9 is used to remove the workpiece that has completed the shaping and rises with the upper mold 8 from the upper mold 8. A device housing 1 is provided under the hydraulic actuator 4, and a cooling and molding chamber 5 is opened on the side of the device housing 1. The top of the cooling and molding chamber 5 is designed in an arc shape. The arc design of the cooling and molding chamber 5 is used to guide the airflow in the cooling and molding chamber 5 to circulate evenly to avoid heat accumulation at the top to form an airflow dead corner.

[0015] A workpiece ejection mechanism is provided below the hydraulic actuator 4. The workpiece ejection mechanism is used to eject the processed soft palate protective cover 12 from the upper mold 8 and can catch the ejected soft palate protective cover 12. A cooling and molding mechanism is provided in the device housing 1. The cooling and molding mechanism is used to bring the ejected soft palate protective cover 12 into the cooling and molding chamber 5 and fully cool the soft palate protective cover 12.

[0016] In this embodiment, Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the workpiece ejection mechanism includes an annular ejector head 9, which is fixedly installed through the hydraulic actuator 4. A feeding device is provided in the device housing 1. A mold base plate 6 is fixedly installed on the device housing 1, and a lower mold 7 is fixedly installed on the mold base plate 6. A discharge port 23 is provided on the lower mold 7, and the discharge port 23 can be connected to the feeding device in the device housing 1. The discharge port 23 is used to extrude silicone raw material into the mold cavity when the upper mold 8 and the lower mold 7 are combined. A hydraulic connecting rod 13 is provided at the lower end of the hydraulic actuator 4, and the hydraulic connecting rod 13 is fixedly installed at the upper end of the upper mold 8. The hydraulic device inside the hydraulic actuator 4 can drive the upper mold 8 to move downward through the hydraulic connecting rod 13 until it fits with the lower mold 7 to form a complete mold cavity. A ejector rod 10 is fixedly installed on the upper end of the annular ejector head 9, and an annular limit rod is fixedly installed below the hydraulic actuator 4. The annular limiting sleeve 11 is used to limit the ejector rod 10. The upper end of the ejector rod 10 is connected to the hydraulic device inside the hydraulic actuator 4. The upper end of the ejector rod 10 is slidably installed in the annular limiting sleeve 11. A spring mechanism is provided in the annular limiting sleeve 11. When the hydraulic mechanism in the hydraulic actuator 4 drives the upper mold 8 and the annular ejector head 9 to move upward synchronously through the hydraulic connecting rod 13 and the ejector rod 10, the ejector rod 10 will stop moving under the restriction of the annular limiting sleeve 11, and the upper mold 8 will still move, so that the annular ejector head 9 can remove the soft palate protective cover 12 that has completed shaping and rises with the upper mold 8 from the upper mold 8. A workpiece supporting plate 19 is provided under the upper mold 8. The workpiece supporting plate 19 is provided with ventilation holes for facilitating multi-angle cooling and shaping of air. The removed soft palate protective cover 12 will fall onto the workpiece supporting plate 19.

[0017] In this embodiment, Figure 7 、 Figure 8 、 Figure 9 , and 10 and Figure 11As shown, the cooling shaping mechanism includes an apparatus air inlet 3, which is fixedly mounted on the side wall of the apparatus housing 1, and the apparatus air inlet 3 is used to provide fresh air to the cooling shaping mechanism. An air guide duct 22 is provided in the annular limiting sleeve 11, and the air guide duct 22 is roughly in the shape of the letter "L". The apparatus air inlet 3 is fixedly mounted on one end of the air guide duct 22, and an air guide fan 21 is provided at the upper end of the air guide duct 22. The air guide fan 21 is used to extract air for cooling the soft palate protective cover 12 from the outside of the apparatus through the air guide duct 22 and the apparatus air inlet 3. A ventilation filter plate 20 is fixedly mounted above the air guide fan 21, and the ventilation filter plate 20 is used to pass the air blown out by the air guide fan 21 through the Filter to prevent dust from being contaminated on the processed soft palate protective cover 12, the ventilation filter plate 20 is fixedly installed at the lower end of the cooling and setting chamber 5, and guide rails 14 are fixedly installed on both sides of the cooling and setting chamber 5. A servo motor 15 is fixedly installed in the guide rail 14, and a screw rod 16 is rotatably installed on the servo motor 15. The screw rod 16 is installed in the guide rail 14, and a slider 17 is slidably installed in the guide rail 14. The slider 17 and the screw rod 16 are rotatably installed, and the rotation of the screw rod 16 can drive the slider 17 to slide in the guide rail 14. A fixed block 18 is fixedly installed between the two sliders 17, and a pressure sensor is provided on the fixed block 18. The workpiece carrying plate 19 and the fixed block 18 are fixedly installed. The pressure sensor on the fixed block 18 can monitor the weight on the workpiece carrier plate 19. When the soft palate protective cover 12 falls on the workpiece carrier plate 19, the pressure sensor is triggered, and the servo motor 15 is controlled to rotate to drive the screw 16 to rotate. The screw 16 drives the slider 17, the fixed block 18, and the workpiece carrier plate 19 to move into the cooling and shaping chamber 5 through engagement. When the workpiece carrier plate 19 reaches the specified position, the air guide fan 21 starts to rotate. The air guide fan 21 draws air from the outside through the air guide duct 22 and the air inlet 3 of the device to cool the soft palate protective cover 12 on the workpiece carrier plate 19. When the cold wind blows to the top of the arc of the cooling and shaping chamber 5, the cooling and shaping The arc-shaped design of chamber 5 can guide the cooling airflow to be evenly distributed, and at the same time, with the help of the guiding characteristics of the arc-shaped structure, it can accelerate the upward discharge of hot air, reduce the surface temperature difference of the cooled object, improve the cooling efficiency and ensure the cooling uniformity. A window is provided on the side wall of the device shell 1, and a switch door 2 is fixedly installed on the window on the side wall of the device shell 1. The soft palate protective cover 12 that has been cooled can be taken out by opening the switch door 2. When the hydraulic actuator 4 drives the upper mold 8 to move upward, the servo motor 15 will drive the screw 16 to rotate, and the screw 16 drives the workpiece carrier plate 19 to move outside the cooling and molding chamber 5, so that it can receive the soft palate protective cover 12 that falls after the next processing is completed.

[0018] Working principle: In the first step, before starting the device, the staff must first check the overall operating status of the equipment and whether there is any blockage in the feed port. Then use tools to clean the residual silicone waste on the surface of the lower mold 7 and the upper mold 8 to prevent impurities from affecting the molding accuracy. After completing the pretreatment, start the device. The hydraulic device inside the hydraulic actuator 4 drives the hydraulic connecting rod 13, driving the upper mold 8 to move downward until it is closed with the lower mold 7 fixed on the mold base 6 to form a complete mold cavity. At this time, the feeding device in the device housing 1 injects silicone raw material into the cavity through the discharge port 23 on the mold base 6. The raw material is evenly filled into the closed space composed of the upper and lower molds through the discharge port 23, laying the foundation for subsequent extrusion molding. In this process, the downward pressure accuracy of the hydraulic actuator 4 and the feeding stability of the feeding device directly affect the uniformity of the raw material filling.

[0019] In the second step, after the silicone raw material is injected into the cavity, the hydraulic actuator 4 continuously applies pressure to the upper mold 8 through the hydraulic connecting rod 13, so that the raw material in the cavity is shaped under constant pressure and set temperature. Since the soft palate protective cover 12 is designed with a columnar structure and an enlarged semicircular part at the top, the raw material is gradually formed into a sheet workpiece with a specific structure under the constraint of the mold. After the shaping is completed, the hydraulic actuator 4 reversely drives the hydraulic connecting rod 13 to move the upper mold 8 upward. Because the enlarged part of the columnar structure of the workpiece fits the inner wall of the upper mold 8, The soft palate protective cover 12 rises synchronously with the mold. At this time, the annular ejector head 9 fixed through the hydraulic actuator 4 moves upward synchronously through the ejector rod 10. When the upper end of the ejector rod 10 touches the spring mechanism in the annular limit sleeve 11, it stops moving due to the constraint of the annular limit sleeve 11, and the upper mold 8 continues to move upward, so that the annular ejector head 9 ejects the workpiece from the mold surface, and the fallen soft palate protective cover 12 falls on the workpiece supporting plate 19 below. The ventilation hole design of the workpiece supporting plate 19 facilitates the subsequent cooling airflow to penetrate.

[0020] In the third step, when the soft palate protective cover 12 falls to the workpiece carrier plate 19, the pressure sensor on the fixed block 18 is triggered, the servo motor 15 starts and drives the screw 16 to rotate, and pushes the fixed block 18 and the workpiece carrier plate 19 into the cooling and molding chamber 5 through the slider 17 in the guide rail 14. At this time, the air guide fan 21 draws external air through the device air inlet 3 and the air guide duct 22, and blows it to the workpiece after filtering through the ventilation filter plate 20. The arc-shaped top of the cooling and molding chamber 5 guides the air flow to circulate evenly and accelerates the discharge of hot air. After the cooling is completed, the staff opens the switch door 2 on the side wall of the device housing 1 to remove the workpiece. At the same time, when the hydraulic actuator 4 drives the upper mold 8 to move upward, the servo motor 15 drives the screw 16 in reverse to reset the workpiece carrier plate 19 to the outside of the cooling and molding chamber 5 to receive the next round of demolding workpieces. During this cycle, the sensitivity of the pressure sensor and the positioning accuracy of the servo motor 15 ensure the automatic connection of the cooling process, and the airflow guiding design of the arc-shaped top improves the cooling efficiency and uniformity.

[0021] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. An extrusion molding device for a soft palate protective sleeve, comprising a hydraulic actuator (4), characterized in that: A hydraulic device is provided inside the hydraulic actuator (4), a soft palate protective sleeve (12) is provided below the hydraulic actuator (4), an upper mold (8) is provided below the hydraulic actuator (4), a lower mold (7) is provided below the upper mold (8), and the upper mold (8) and the lower mold (7) are combined into a complete mold, an annular ejector head (9) is provided below the hydraulic actuator (4), a device housing (1) is provided below the hydraulic actuator (4), a cooling and shaping chamber (5) is provided on the side of the device housing (1), and the top of the cooling and shaping chamber (5) is designed to be arc-shaped; A workpiece ejection mechanism is provided below the hydraulic actuator (4), and the workpiece ejection mechanism is used to eject the processed soft palate protective cover (12) from the upper mold (8), and can catch the ejected soft palate protective cover (12). A cooling and shaping mechanism is provided in the device housing (1), and the cooling and shaping mechanism is used to bring the ejected soft palate protective cover (12) into the cooling and shaping chamber (5) and perform sufficient cooling.

2. The extrusion molding device for a soft palate protective sleeve according to claim 1, characterized in that: The workpiece ejection mechanism comprises an annular ejection head (9), the annular ejection head (9) and the hydraulic actuator (4) are fixedly installed through each other, a feeding device is provided in the device housing (1), and a mold base plate (6) is fixedly installed on the device housing (1).

3. The extrusion molding device for a soft palate protective sleeve according to claim 2, characterized in that: The lower mold (7) is fixedly mounted on the mold base (6), and a discharge port (23) is provided on the mold base (6). The discharge port (23) can be connected to a feeding device in the device housing (1), and a hydraulic connecting rod (13) is provided at the lower end of the hydraulic actuator (4).

4. The extrusion molding device for a soft palate protective sleeve according to claim 3, characterized in that: The hydraulic connecting rod (13) is fixedly mounted on the upper end of the upper mold (8), an ejector rod (10) is fixedly mounted on the upper end of the annular ejector head (9), and an annular limiting sleeve (11) is fixedly mounted below the hydraulic actuator (4).

5. The extrusion molding device for a soft palate protective sleeve according to claim 4, characterized in that: The upper end of the ejector rod (10) is connected to the hydraulic device inside the hydraulic actuator (4), and the upper end of the ejector rod (10) is slidably installed in the annular limiting sleeve (11). A spring mechanism is provided in the annular limiting sleeve (11), and a workpiece supporting plate (19) is provided below the upper mold (8).

6. The extrusion molding device for a soft palate protective sleeve according to claim 5, characterized in that: The cooling and shaping mechanism comprises an apparatus air inlet (3), the apparatus air inlet (3) being fixedly mounted on a side wall of the apparatus housing (1), an air guide duct (22) being provided in the annular limiting sleeve (11), and the apparatus air inlet (3) being fixedly mounted on one end of the air guide duct (22).

7. The extrusion molding device for a soft palate protective sleeve according to claim 6, characterized in that: An air guide fan (21) is provided at the upper end of the air guide duct (22), a ventilation filter plate (20) is fixedly mounted above the air guide fan (21), and the ventilation filter plate (20) is fixedly mounted at the lower end of the cooling and shaping chamber (5).

8. The extrusion molding device for a soft palate protective sleeve according to claim 7, characterized in that: Guide rails (14) are fixedly installed on both sides of the cooling and shaping chamber (5), servo motors (15) are fixedly installed in the guide rails (14), and screw rods (16) are rotatably installed on the servo motors (15), and the screw rods (16) are installed in the guide rails (14).

9. The extrusion molding device for a soft palate protective sleeve according to claim 8, characterized in that: A slider (17) is slidably installed in the guide rail (14), a fixed block (18) is fixedly installed between the two sliders (17), and a pressure sensor is provided on the fixed block (18).

10. The extrusion molding device for a soft palate protective sleeve according to claim 9, characterized in that: The workpiece carrier plate (19) and the fixing block (18) are fixedly installed, a window is provided on the side wall of the device housing (1), and a switch door (2) is fixedly installed on the window on the side wall of the device housing (1).

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