Silicone toothbrush hot press forming equipment and production method thereof

Abstract

The application discloses a silica gel toothbrush hot-press forming equipment and a production method thereof, and relates to the technical field of toothbrush manufacturing. The equipment comprises a bottom box, a chain transmission belt, a top frame and a hot melting mechanism. The bottom box is provided with a collecting groove, a through channel, a counter and a photoelectric positioner, a first lifter is installed on the top side of the bottom box, and the output shaft end of the first lifter is fixedly connected with a bottom tray. A plurality of uniformly distributed bottom molds are installed on the chain transmission belt, and the downward path of the bottom molds passes through the through channel. The top frame is provided with a lifting frame and a second lifter for driving the lifting frame to lift and lower, and an injection pressure head is arranged at the bottom of the lifting frame. The hot melting mechanism is fixed to the lifting frame, and the output end of the hot melting mechanism is connected with the injection pressure head. The injection pressure head is provided with a top cavity with an opening facing downward, the bottom mold is provided with a bottom cavity matched with the top cavity and an elastic top rod. The top side of the through channel is provided with an air pipe and a pneumatic tank, and a pneumatic push rod can push the top rod to eject the formed part. The application can realize multi-station cyclic forming and automatic demolding, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of toothbrush molding and manufacturing technology, and in particular to a silicone toothbrush hot pressing molding equipment and its production method. Background Technology

[0002] Existing thermoforming equipment for silicone toothbrushes mostly adopts a single-station reciprocating structure, where the upper and lower molds complete the entire process of mold closing, material injection, cooling, and demolding at the same station. Since the silicone raw material needs to remain in the cavity to cool after being molten and injected, the injection mechanism of the single-station equipment is idle during the cooling waiting period, resulting in a long overall cycle time and low production capacity.

[0003] In addition, in the demolding process, existing equipment mostly uses manual removal of cooling parts or fixed ejector pin structures in the bottom mold. The reset operation of the ejector pins after demolding depends on manual labor, resulting in low automation and low ejection efficiency during continuous production, which affects the overall production line operation rhythm. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention provides a silicone toothbrush thermoforming device, including a base box, a chain conveyor belt, a top frame, and a hot-melt mechanism. The base box is equipped with a collection trough, a through channel, a counter for periodically detecting the number of bottom molds, and a photoelectric positioner for detecting the positioning point signal of the bottom molds. A first lifting device is installed on the top side of the base box. A bottom tray is fixedly installed at the output shaft end of the first lifting device. An air pipe is configured on the top side of the through channel, and multiple pneumatic canisters are configured on the air pipe. Pneumatic push rods are elastically configured on the pneumatic canisters. The upward path of the chain conveyor belt is located above the counter, photoelectric positioner, and bottom tray. Its downward path passes through the through channel of the base box, and multiple evenly distributed bottom molds are installed on the chain conveyor belt. The top frame is equipped with a lifting frame and a second lifting device for driving the lifting frame to move vertically. Multiple injection heads are configured at the bottom of the lifting frame. The hot-melt mechanism is fixed to the lifting frame, and its output end is connected to the injection heads. The injection head has a top cavity with an opening facing downwards, and the bottom mold has a bottom cavity with an opening facing upwards that matches the top cavity. The bottom mold is elastically configured with an ejector rod that matches the pneumatic push rod and is used to eject the cooled and molded part.

[0005] Preferably, rollers are provided at both ends of the chain link shaft of the chain conveyor belt. The bottom box is provided with a guide rail located at the upper opening of the collection trough, and the rollers in the downward path of the chain conveyor belt make rolling contact with the guide rail.

[0006] Preferably, the bottom tray is located between the counter and the photoelectric positioner, with the detection direction of the counter and the photoelectric positioner pointing vertically upward, and the counter and the photoelectric positioner aligned with the movement position of the bottom mold.

[0007] Preferably, a support platform is provided on the top side of the bottom box, the first lifter is fixedly installed on the upper side of the support platform, and the counter and photoelectric positioner are installed on the top of the independent bracket on the upper side of the support platform.

[0008] Preferably, the top surface of the bottom tray has a slot for limiting and supporting the bottom mold above the bottom tray. The bottom cavity of the bottom mold has an engagement notch with a width larger than that of the top cavity. The injection head fits into the engagement notch and has a pressure relief hole communicating with the top cavity.

[0009] Preferably, the end of the ejector rod facing the bottom cavity has an inner cavity surface that matches the curved surface of the bottom cavity, and a first tension spring is disposed inside the bottom mold for elastically restoring the ejector rod to its initial position. The bottom mold is provided with an outer limiting ring for limiting the ejector rod, and a central through hole is opened in the central area of ​​the outer limiting ring, which matches the pneumatic push rod of the pneumatic can.

[0010] Preferably, the top side of the pneumatic canister is provided with an air port that communicates with the air pipe, and the pneumatic canister is equipped with a second tension spring for elastically restoring the pneumatic push rod to its initial position.

[0011] Preferably, a top tube is configured on the top of the top frame, and a sliding tube is fixedly connected to the top of the hot melt mechanism. The upper end of the sliding tube is slidably installed inside the top tube through a piston structure, and an external injection pipe is connected to the upper end of the top tube.

[0012] Preferably, the bottom of the lifting frame is provided with a heat preservation cavity, and each injection head is provided with an injection channel. A heat preservation injection pipe is provided between the output end of the hot melt mechanism and the heat preservation cavity.

[0013] The present invention also provides a production method for the above-mentioned silicone toothbrush hot pressing molding equipment, comprising the following steps: S1. The power mechanism drives the chain conveyor belt to move, causing multiple bottom molds installed on the chain conveyor belt to move along the upward path.

[0014] S2. The counter periodically accumulates the number of bottom molds on the chain conveyor belt. When the preset number is reached, the system determines that the single production quantity has been reached. After the photoelectric positioner detects that the bottom mold has reached the preset position, the chain conveyor belt stops moving.

[0015] S3. The first lifter drives the bottom tray to rise, so that the bottom tray lifts and positions the bottom mold.

[0016] S4. External raw materials are fed into the hot melting mechanism, which heats and melts the raw materials.

[0017] S5. The second lifting device drives the lifting frame to move down, so that the injection head closes with the bottom mold, and the top cavity of the injection head and the bottom cavity of the bottom mold form a molding cavity.

[0018] S6. The hot melt mechanism injects molten raw materials into the molding cavity.

[0019] S7. After the preset time is maintained to allow the raw material to cool and solidify in the cavity, the second lifter drives the lifting frame to rise, and the first lifter drives the bottom tray to descend.

[0020] S8. The power mechanism drives the chain conveyor belt to move again, moving the bottom mold carrying the molded part out of the processing area, and the unloaded bottom mold enters the processing area to continue processing.

[0021] S9. After the bottom mold carrying the molded part descends with the chain conveyor belt to the through channel of the bottom box, the external air source drives the pneumatic push rod to move once through the air pipe and pneumatic tank. The pneumatic push rod pushes the push rod inside the bottom mold, and the push rod pushes the molded part away from the bottom mold. The molded part falls into the collection groove of the bottom box.

[0022] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a chain conveyor belt to drive multiple bottom molds in a circulating cycle. The molding injection station and the cooling demolding station are arranged separately along the conveyor path. After the bottom mold completes the injection, it continues to descend with the conveyor belt to cool down. At the same time, the empty bottom mold enters the molding station for injection. Molding and cooling are carried out in parallel, which significantly improves the equipment utilization rate and production cycle.

[0023] 2. The present invention is equipped with a pneumatic tank and a pneumatic push rod on the top side of the through channel. When the bottom mold descends through the through channel, the push rod is automatically driven to push out the cooling part and fall into the collection tank. The demolding process does not require manual intervention. The push rod and the pneumatic push rod are automatically reset by tension springs, which ensures high reliability for continuous production. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention.

[0025] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0026] Figure 3 for Figure 1 A magnified structural diagram of section B in the middle.

[0027] Figure 4 for Figure 1 A magnified structural diagram of part C in the middle.

[0028] Figure 5 for Figure 4 A magnified structural diagram of part D in the middle.

[0029] Figure 6 This is a schematic diagram of the structure of the first lifting device and the bottom tray in this invention.

[0030] Figure 7 This is a cross-sectional schematic diagram of the bottom box and the chain conveyor belt in this invention.

[0031] Wherein: 1-base box; 101-collection trough; 102-guide rail; 103-through channel; 104-support platform; 105-counter; 106-photoelectric positioner; 2-air pipe; 3-first lifter; 4-bottom tray; 401-slot; 5-chain conveyor belt; 501-roller; 6-bottom mold; 601-locking notch; 602-bottom cavity; 603-top rod; 6031-inner cavity surface; 604-first tension spring; 605- Outer limiting ring; 6051-Center perforation; 7-Top frame; 701-Top pipe; 8-Lifting frame; 801-Insulation cavity; 802-Injection channel; 803-Injection head; 804-Top cavity; 805-Pressure relief hole; 9-Hot melt mechanism; 901-Sliding tube; 10-Insulation injection tube; 11-Pneumatic tank; 1101-Air port; 1102-Pneumatic push rod; 1103-Second tension spring; 12-External injection pipe; 13-Second lifting device. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Example 1 This invention discloses a silicone toothbrush thermoforming device, the specific structural design of which is as follows: Combination Figure 1 , Figure 3 , Figure 6 The device of this invention includes a base box 1, a chain conveyor belt 5, a top frame 7, and a hot-melt mechanism 9. The base box 1 serves as the bottom mounting base of the device and has an internal collection trough 101 for receiving cooled, molded parts ejected from the bottom mold 6. A through-passage 103 is provided inside the base box 1, through which the downward path of the chain conveyor belt 5 passes. A support platform 104 is provided on the top side of the base box 1, and a first lifter 3 is fixedly mounted on the upper side of the support platform 104. A bottom tray 4 is fixedly mounted on the output shaft end of the first lifter 3. A counter 105 and a photoelectric positioner 106 are mounted on the top of an independent bracket on the upper side of the support platform 104. The counter 105 periodically detects the number of bottom molds 6 passing above it, and the photoelectric positioner 106 detects the signal of the positioning point of the bottom mold 6. The bottom tray 4 is located between the counter 105 and the photoelectric positioner 106. The detection directions of both the counter 105 and the photoelectric positioner 106 are vertically upward and aligned with the path position of the bottom mold 6.

[0034] Combination Figure 1 , Figure 3 , Figure 7Multiple evenly distributed bottom molds 6 are installed on the chain conveyor belt 5. The upward path of the chain conveyor belt 5 is located above the counter 105, photoelectric positioner 106, and bottom tray 4, while its downward path passes through the through channel 103 of the bottom box 1. Rollers 501 are provided at both ends of the chain link shaft of the chain conveyor belt 5. The bottom box 1 is provided with a guide rail 102 located at the upper opening of the collection trough 101. The rollers 501 in the downward path of the chain conveyor belt 5 roll in contact with the guide rail 102, and the guide rail 102 provides guidance and support for the downward path, so that the bottom mold 6 maintains a stable posture during the downward process.

[0035] Combination Figure 1 , Figure 3 , Figure 6 The bottom tray 4 has a slot 401 on its top surface, which is used to limit and support the bottom mold 6 above the bottom tray 4. When the first lifter 3 drives the bottom tray 4 to rise, the bottom mold 6 is engaged in the slot 401, thus fixing the bottom mold 6 in the molding station. The top frame 7 is located above the bottom box 1. The top frame 7 is equipped with a lifting frame 8 and a second lifter 13 that drives the lifting frame 8 to rise and fall vertically. The bottom of the lifting frame 8 is equipped with multiple injection heads 803. The hot melt mechanism 9 is fixed to the lifting frame 8, and its output end is connected to the injection head 803. The injection head 803 has a top cavity 804 with an opening facing downwards, and the bottom mold 6 has a bottom cavity 602 with an opening facing upwards and cooperating with the top cavity 804. The bottom cavity 602 of the bottom mold 6 has a locking notch 601 at its outer opening. The width of the locking notch 601 is larger than that of the top cavity 804, and the injection head 803 is engaged and abuts against the locking notch 601. The injection head 803 is provided with a pressure relief hole 805 that communicates with the top cavity 804. During the injection molding process, the air in the cavity is discharged through the pressure relief hole 805.

[0036] Combination Figure 4 , Figure 5 The bottom mold 6 is elastically equipped with an ejector pin 603, which is used to eject the cooled and formed part. An inner cavity surface 6031 is provided on the end side of the ejector pin 603 facing the bottom cavity 602. The inner cavity surface 6031 mates with the curved surface of the bottom cavity 602, ensuring that the ejector pin 603 does not damage the forming surface of the bottom cavity 602 when it is in the ejection position. A first tension spring 604 is disposed inside the bottom mold 6, which elastically restores the ejector pin 603 to its initial position after ejection. The bottom mold 6 is provided with an outer limiting ring 605, which limits the ejector pin 603 to prevent it from coming out of the bottom mold 6. A central through hole 6051 is formed in the central area of ​​the outer limiting ring 605.

[0037] Combination Figure 1 , Figure 4 , Figure 5An air pipe 2 is arranged on the top side of the through channel 103, and multiple pneumatic canisters 11 are arranged on the air pipe 2, which are connected to the air pipe 2. An air port 1101 is provided on the top side of the pneumatic canister 11, which is connected to the air pipe 2. A pneumatic push rod 1102 is elastically arranged inside the pneumatic canister 11, and a second tension spring 1103 is also arranged inside the pneumatic canister 11. The second tension spring 1103 is used to elastically return to its initial position after the pneumatic push rod 1102 completes the ejection action. The pneumatic push rod 1102 cooperates with the central through hole 6051 of the outer limiting ring 605. When the bottom mold 6 descends with the chain conveyor belt 5 to the position of the through channel 103, the pneumatic push rod 1102 extends downward under the drive of air pressure, passes through the central through hole 6051, and pushes the push rod 603 to move, pushing the cooled molded part in the bottom cavity 602 away from the bottom mold 6.

[0038] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 The top of the top frame 7 is equipped with a top pipe 701, and the top of the hot melt mechanism 9 is fixedly connected to a sliding pipe 901. The upper end of the sliding pipe 901 is slidably installed inside the top pipe 701 through a piston structure, and the upper end of the top pipe 701 is connected to an external injection pipe 12. The bottom of the lifting frame 8 is provided with a heat preservation cavity 801, and each injection pressure head 803 is provided with an injection channel 802. A heat preservation injection pipe 10 is provided between the output end of the hot melt mechanism 9 and the heat preservation cavity 801. The external injection pipe 12 introduces the crushed raw material into the hot melting mechanism 9 through the top pipe 701 and the sliding pipe 901. The hot melting mechanism 9 heats and melts the raw material and then sends it into the heat preservation cavity 801 through the heat preservation injection pipe 10. The molten raw material is kept at a uniform temperature in the heat preservation cavity 801 and then distributed to the corresponding injection head 803 through each injection channel 802 (a screw-type feeding mechanism can be configured in the hot melting mechanism 9 to ensure that the molten raw material in the heat preservation cavity 801 is injected into the top cavity 804 and the bottom cavity 602 under pressure).

[0039] Example 2 In this embodiment, in addition to detecting the positioning signal of the bottom mold 6 at the forming station, the photoelectric positioner 106 can also be connected to the solenoid valve of the external air source (the path distance between the detection point of the photoelectric positioner 106 and the action point of the pneumatic tank 11 below is an integer multiple of the distance between adjacent bottom molds). When the bottom mold 6 carrying the cooled molded part descends with the chain conveyor belt 5 to the ejection station in the through channel 103, the positioning signal emitted by the photoelectric positioner 106 triggers the air passage of the pneumatic tank 11 to open or close, causing the pneumatic push rod 1102 to complete one ejection action.

[0040] Example 3 This invention designs a production method for silicone toothbrush thermoforming equipment, the specific method is as follows: First, the power mechanism drives the chain conveyor belt 5 to move, causing multiple bottom molds 6 mounted on the chain conveyor belt 5 to advance along the upward path. The counter 105 periodically accumulates and detects the number of bottom molds 6 on the chain conveyor belt 5. When the accumulated number of bottom molds 6 reaches a preset number, the system determines that the single production quantity has been reached. After the photoelectric positioner 106 detects that the bottom mold 6 has reached the preset position, the chain conveyor belt 5 stops moving, so that the unloaded bottom mold 6 is positioned directly above the bottom tray 4.

[0041] The first lifting device 3 drives the bottom tray 4 to rise until the multiple bottom molds 6 directly above the bottom tray 4 are engaged in the slots 401 of the bottom tray 4, and the bottom molds 6 are positioned and supported on the bottom tray 4. The external feeding pipe 12 introduces the crushed raw material into the hot melting mechanism 9, which heats and melts the raw material.

[0042] The second lifting device 13 drives the lifting frame 8 to move down until the injection head 803 is engaged with the engagement notch 601 of the bottom mold 6, so that the top cavity 804 of the injection head 803 and the bottom cavity 602 of the bottom mold 6 are aligned and closed, forming a molding cavity together.

[0043] The hot melting mechanism 9 injects the heated molten material into the heat preservation cavity 801 through the heat preservation injection pipe 10. After the molten material is kept at a uniform temperature in the heat preservation cavity 801, it is distributed into the top cavity 804 of the injection head 803 and the bottom cavity 602 of the bottom mold 6 through the injection channel 802. The air in the cavity is discharged through the pressure relief hole 805.

[0044] Maintaining the preset time allows the molten material to cool and solidify within the mold cavity. After initial cooling and shaping, the second lifter 13 drives the lifting frame 8 to rise, separating the injection head 803 from the bottom mold 6. The first lifter 3 then lowers the bottom tray 4, detaching it from the bottom mold 6.

[0045] The power mechanism drives the chain conveyor belt 5 again, moving the initially cooled and shaped product along with the bottom mold 6 out of the bottom tray 4. Subsequently, the empty bottom mold 6 enters the bottom tray 4 to continue the next round of processing. After the bottom mold 6 carrying the product leaves the hot processing area, it continues to descend with the chain conveyor belt 5, and the product continues to cool naturally during the descent.

[0046] When the bottom mold 6 reaches the through channel 103 of the bottom box 1, the external air source supplies air to the pneumatic tank 11 through the air pipe 2. The pneumatic tank 11 drives the pneumatic push rod 1102 to move once. After the pneumatic push rod 1102 passes through the center hole 6051 of the outer limit ring 605, it pushes the push rod 603 inside the bottom mold 6. The push rod 603 pushes the cooled molded part carried by the bottom mold 6 away from the bottom mold 6, and the molded part falls into the collection tank 101 for collection.

[0047] After completing one ejection action, the pneumatic push rod 1102 returns to its original position under the action of the second tension spring 1103. The push rod 603 returns to its initial position under the action of the first tension spring 604, waiting for the next working cycle.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A silicone toothbrush hot-press molding equipment, characterized in that, include: The bottom box (1) is equipped with a collection trough (101), a through channel (103), a counter (105) for periodically detecting the number of bottom molds (6), and a photoelectric locator (106) for detecting the positioning point signal of the bottom molds (6). A first lifter (3) is installed on the top side of the bottom box (1). Among them, the first lifting device (3) has a bottom tray (4) fixedly installed at the output shaft end, the top side of the through channel (103) is equipped with an air pipe (2), the air pipe (2) is equipped with multiple pneumatic canisters (11), and the pneumatic canisters (11) are elastically equipped with pneumatic push rods (1102). The chain conveyor belt (5) has an upward path located above the counter (105), photoelectric positioner (106), and bottom tray (4), and its downward path passes through the through channel (103) of the bottom box (1). The chain conveyor belt (5) is equipped with multiple evenly distributed bottom molds (6). The top frame (7) is equipped with a lifting frame (8) and a second lifting device (13) that drives the lifting frame (8) to rise and fall vertically. The bottom of the lifting frame (8) is equipped with multiple injection heads (803). The hot melt mechanism (9) is fixed at the lifting frame (8) and its output end is connected to the injection head (803); The injection head (803) is provided with a top cavity (804) with the opening facing downwards, and the bottom mold (6) is provided with a bottom cavity (602) with the opening facing upwards and cooperating with the top cavity (804). The bottom mold (6) is elastically configured with an ejector rod (603) that cooperates with the pneumatic push rod (1102) and is used to eject the cooled molded part.

2. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: Rollers (501) are provided at both ends of the chain link shaft of the chain conveyor belt (5). The bottom box (1) is provided with a guide rail (102) located at the upper opening of the collection tank (101), and the roller (501) in the downward path of the chain conveyor belt (5) makes rolling contact with the guide rail (102).

3. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: The bottom tray (4) is located between the counter (105) and the photoelectric locator (106). The detection direction of the counter (105) and the photoelectric locator (106) is vertically upward. The counter (105) and the photoelectric locator (106) are aligned with the path position of the bottom mold (6).

4. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: A support platform (104) is provided on the top side of the base box (1). The first lifter (3) is fixedly installed on the upper side of the support platform (104). The counter (105) and photoelectric locator (106) are installed on the top of the independent bracket on the upper side of the support platform (104).

5. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: The bottom tray (4) has a slot (401) on its top surface for limiting and supporting the bottom mold (6) above the bottom tray (4). The bottom cavity (602) of the bottom mold (6) has an opening with a locking notch (601) with a width greater than that of the top cavity (804). The injection head (803) is engaged and abuts against the locking notch (601). The injection head (803) has a pressure relief hole (805) communicating with the top cavity (804).

6. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: The top rod (603) is provided with an inner cavity surface (6031) that matches the curved surface of the bottom cavity (602) on the end side facing the bottom cavity (602), and a first tension spring (604) for elastically restoring the top rod (603) to its initial position is provided in the bottom mold (6). The bottom mold (6) is provided with an outer limiting ring (605) for limiting the top rod (603). The outer limiting ring (605) has a central through hole (6051) in the central area. The central through hole (6051) cooperates with the pneumatic push rod (1102) of the pneumatic tank (11).

7. The silicone toothbrush hot pressing molding equipment according to claim 6, characterized in that: The pneumatic tank (11) has an air port (1101) on its top side that is connected to the air pipe (2), and the pneumatic tank (11) is equipped with a second tension spring (1103) for elastically restoring the pneumatic push rod (1102) to its initial position.

8. The silicone toothbrush hot pressing molding equipment according to claim 1, characterized in that: The top of the top frame (7) is equipped with a top tube (701), and the top of the hot melt mechanism (9) is fixedly connected to a sliding tube (901). The upper end of the sliding tube (901) is slidably installed inside the top tube (701) through a piston structure. The upper end of the top tube (701) is connected to an external injection tube (12).

9. The silicone toothbrush hot pressing molding equipment according to claim 8, characterized in that: The bottom of the lifting frame (8) is provided with a heat preservation cavity (801), and an injection channel (802) is provided between the heat preservation cavity (801) and each injection head (803). A heat preservation injection pipe (10) is provided between the output end of the hot melt mechanism (9) and the heat preservation cavity (801).

10. A method for producing silicone toothbrushes using the thermoforming equipment according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. The power mechanism drives the chain conveyor belt (5) to move, so that multiple bottom molds (6) installed on the chain conveyor belt (5) move along the upward path; S2. The counter (105) periodically accumulates the number of bottom molds (6) on the chain conveyor belt (5). When the preset number is reached, the system determines that the single production quantity has been reached. After the photoelectric positioner (106) detects that the bottom mold (6) has reached the preset position, the chain conveyor belt (5) stops moving. S3. The first lifter (3) drives the bottom tray (4) to rise, so that the bottom tray (4) lifts and positions the bottom mold (6). S4. External raw materials are fed into the hot melting mechanism (9), and the hot melting mechanism (9) heats and melts the raw materials; S5. The second lifting device (13) drives the lifting frame (8) to move down, so that the injection head (803) closes with the bottom mold (6), and the top cavity (804) of the injection head (803) and the bottom cavity (602) of the bottom mold (6) form a molding cavity; S6. The hot melt mechanism (9) injects the molten material into the molding cavity; S7. After the material has cooled and solidified in the cavity for a preset time, the second lifter (13) drives the lifting frame (8) to rise, and the first lifter (3) drives the bottom tray (4) to fall. S8. The power mechanism drives the chain conveyor belt (5) to move again, moving the bottom mold (6) carrying the molded part out of the processing area, and the empty bottom mold (6) enters the processing area to continue processing; S9. After the bottom mold (6) carrying the molded part descends with the chain conveyor belt (5) to the through channel (103) of the bottom box (1), the external air source drives the pneumatic push rod (1102) to move once through the air pipe (2) and the pneumatic tank (11). The pneumatic push rod (1102) pushes the push rod (603) in the bottom mold (6), and the push rod (603) pushes the molded part away from the bottom mold (6). The molded part falls into the collection groove (101) of the bottom box (1).

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