Plastic suction mold convenient to open and close

Abstract

The utility model relates to the technical field of plastic uptake molds, and discloses a plastic uptake mold convenient to open and close, which comprises a mold frame, a top lifting mold and a replaceable mold, the top lifting mold is arranged at the bottom end of the mold frame, the top lifting mold can freely and vertically slide on the upper half part of the mold frame, and the replaceable mold is arranged on the mold frame. According to the plastic uptake mold convenient to open and close, the motor driving type lifting top mold is adopted, the opening and closing efficiency of the mold after forming is effectively improved, the production efficiency is improved, the mold is matched with the replaceable mold, and the use range of the mold is effectively widened.

Description

Technical Field

[0001] This utility model relates to the field of vacuum forming mold technology, specifically to a vacuum forming mold that is easy to open and close. Background Technology

[0002] A vacuum forming mold is a mold used in conjunction with a vacuum forming machine. Common types include plaster molds, electroplated copper molds, and aluminum molds. In the production process, the mold is first installed on the upper iron plate of the vacuum chamber. Then, the specifications of the plastic sheet are adjusted according to the size of the mold. After the plastic sheet is softened in a constant temperature oven, it is placed on the mold in the vacuum chamber. Next, the suction switch is turned on, and the air between the mold and the plastic sheet is removed through the dense suction holes on the mold. Under the action of air pressure, the softened plastic sheet is tightly attached to the surface of the mold. After the plastic sheet cools down, a product with the same shape as the mold is obtained.

[0003] However, traditional vacuum forming molds often use bolts or manual methods to form the sealed space of the vacuum chamber, resulting in poor sealing of the vacuum chamber forming space. This leads to poor forming effect of the softened plastic sheet, and the sealing method requires a lot of time and cost, meaning that the opening and closing efficiency is not high. Therefore, we propose a vacuum forming mold that is easy to open and close. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an easy-to-open and close vacuum forming mold, thus solving the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a thermoforming mold that is easy to open and close, comprising a mold frame, a top lifting mold, and a replaceable mold. The bottom end of the mold frame is provided with a top lifting mold, which can slide freely vertically in the upper half of the mold frame, and a replaceable mold is provided inside the mold frame on one side corresponding to the top lifting mold.

[0008] Preferably, the top end of the mold frame is provided with rods at all four corners, and a sliding groove is provided on the opposite side of the rods. A rectangular connecting plate is provided at the top end of the rods. A mating hole is provided in the center of the connecting plate, and four connecting holes are provided around the mating hole in an axially symmetrical manner. A valve is provided at the center of the bottom end face of the mold frame, and a vacuum extraction pipe is provided on the horizontal end face of the valve. Support columns are provided at all four corners of the bottom end face of the mold frame.

[0009] Preferably, a mold groove is provided at the center of the end face of the corresponding rod inside the mold frame, and a connecting hole is provided on each of the two opposite sides of the mold groove in an axisymmetrical manner. A rubber sealing ring is provided on the end face of the corresponding rod inside the mold frame, and the inside of the rubber sealing ring is the mold groove. A set of vacuum extraction grooves are provided at the bottom end of the mold groove in an equidistant manner. A set of extraction holes are provided at the bottom of the vacuum extraction grooves in an equidistant manner, and the extraction holes are connected to the intermediate chamber inside the mold frame. The end of the extraction hole away from the vacuum extraction groove is connected to a valve.

[0010] Preferably, the top lifting mold consists of three parts: a lifting component, a threaded bushing, and a motor. The threaded bushing is an intermediate component, connecting the lifting component and the motor. The threaded bushing is also connected to the threaded output shaft of the motor. The output shaft of the motor body is connected to the mating hole on the top of the mold frame.

[0011] Preferably, the top end of the lifting component is provided with a rectangular frame, the top center of which is provided with a threaded bushing, and both opposite side walls of the lifting component are provided with sliders that are symmetrically distributed. The sliders are slidably connected with the sliding grooves, and the bottom end of the lifting component away from the motor is provided with a sealing groove that is connected to the rubber sealing ring.

[0012] Preferably, the replaceable mold has an extended connecting plate on two opposite sidewalls, and each end of the extended connecting plate has a second connecting hole. The second connecting hole is connected to the first connecting hole by an adapter screw. The replaceable mold also has a specially made set of mold holes inside, which are connected to the vacuum extraction groove.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a vacuum forming mold that is easy to open and close, and has the following beneficial effects:

[0015] 1. This easy-to-open and close vacuum forming mold features a bottom mold plate designed as a mold frame and an upper mold plate designed as a lifting mold. Under the control of a motor, it effectively improves the sealing effect, i.e., the formation of vacuum conditions, which greatly improves the vacuum forming quality of softened plastic sheets. The opening and closing speed is superior to the traditional manual and bolt methods, which greatly improves the opening and closing speed, improves the demolding efficiency after molding, and improves production efficiency.

[0016] 2. This easy-to-open and close vacuum forming mold uses a replaceable mold inside, which can realize multiple uses of a single mold frame structure and improve the scope of use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the blister molding mold for easy opening and closing according to this utility model;

[0018] Figure 2 This is a cross-sectional view of the blister molding mold for easy opening and closing according to this utility model;

[0019] Figure 3 This is a cross-sectional view of the mold frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the top lifting mold of this utility model;

[0021] Figure 5 This is a schematic diagram of the lifting component and threaded bushing structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the replaceable mold of this utility model.

[0023] In the diagram: 1. Mold frame; 2. Top lifting mold; 3. Replaceable mold; 4. Rod; 5. Slide groove; 6. Mating hole; 7. Rubber sealing ring; 8. Mold groove; 9. Vacuum extraction groove; 10. Extraction hole; 11. Intermediate chamber; 12. Valve; 13. Vacuum extraction pipe; 14. Connection hole one; 15. Lifting component; 16. Threaded bushing; 17. Motor; 18. Slider; 19. Sealing groove; 20. Extended connecting plate; 21. Connection hole two; 22. Mold hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 A thermoforming mold that is easy to open and close includes a mold frame 1, a top lifting mold 2 and a replaceable mold 3. The bottom end of the mold frame 1 is provided with the top lifting mold 2, which can slide freely vertically in the upper half of the mold frame 1. The replaceable mold 3 is provided inside the mold frame 1 on one side corresponding to the top lifting mold 2.

[0026] Furthermore, the top end of the mold frame 1 is provided with four corner rods 4, and a sliding groove 5 is provided on the opposite side of the rods 4. A rectangular connecting plate is provided at the top end of the rods 4. A mating hole 6 is provided in the center of the connecting plate, and four connecting holes are provided around the mating hole 6 in an axially symmetrical manner. A valve 12 is provided at the center of the bottom end face of the mold frame 1, and a vacuum extraction pipe 13 is provided on the horizontal end face of the valve 12. Support columns are provided at the four corners of the bottom end face of the mold frame 1. The valve 12 effectively ensures the internal vacuum quality and effectively reduces the service time of the vacuum pump, thus improving its service life. The rectangular connecting plate at the top of the mold frame 1 effectively fixes the motor 17, providing a stable power source for the lifting of the lifting component 15.

[0027] Furthermore, a mold groove 8 is provided at the center of the end face of the corresponding rod 4 inside the mold frame 1, and connecting holes 14 are provided on both opposite sides of the mold groove 8 in an axisymmetrical manner. A rubber sealing ring 7 is provided on the end face of the corresponding rod 4 inside the mold frame 1, and the mold groove 8 is inside the rubber sealing ring 7. A set of vacuum extraction grooves 9 are provided at the bottom end of the mold groove 8 in an equidistant manner. A set of extraction holes 10 are provided at the bottom of the vacuum extraction grooves 9 in an equidistant manner, and the extraction holes 10 are connected to the intermediate chamber 11 inside the mold frame 1. The end of the extraction hole 10 away from the vacuum extraction groove 9 is connected to the valve 12. The vacuum extraction grooves 9 and extraction holes 10 inside the mold frame 1 effectively ensure the smoothness of air extraction and prevent blockage by debris.

[0028] Furthermore, the top lifting mold 2 consists of three parts: a lifting component 15, a threaded bushing 16, and a motor 17. The threaded bushing 16 is an intermediate component, connecting the lifting component 15 and the motor 17. The threaded bushing 16 is also connected to the threaded output shaft of the motor 17. The output shaft of the motor 17 is connected to the mating hole 6 on the top of the mold frame 1. The top lifting mold 2 has a reasonable structure, which greatly improves the opening and closing efficiency of the mold and the demolding and ejection efficiency after molding.

[0029] Furthermore, the top end of the lifting component 15 is provided with a rectangular frame, the top center of which is provided with a threaded bushing 16, and both opposite side walls of the lifting component 15 are provided with sliders 18 distributed symmetrically on the axis. The sliders 18 are slidably connected with the sliding grooves 5. The bottom end of the lifting component 15 away from the motor 17 is provided with a sealing groove 19 that is connected with the rubber sealing ring 7. The sealing groove 19 of the lifting component 15 and the rubber sealing ring 7 are in an interference seal, which effectively ensures the internal vacuum high pressure environment.

[0030] Furthermore, the replaceable mold 3 has an extended connecting plate 20 on two opposite side walls, and both ends of the extended connecting plate 20 are provided with a second connecting hole 21. The second connecting hole 21 is connected to the first connecting hole 14 by an adapter screw. The replaceable mold 3 also has a specially made set of mold holes 22 inside, which are connected to the vacuum extraction groove 9. The replaceable mold 3 can realize multiple uses of a mold frame structure, greatly improving the scope of use.

[0031] Working principle: Install the easily openable and closeable vacuum forming mold correctly according to the diagram. Specifically, the motor 17 of the replaceable mold 3 controls the lifting component 15 via the threaded bushing 16. Place the replaceable mold 3 to be vacuum-formed into the mold slot 8 inside the mold frame 1 and secure it with matching screws. Place the softened plastic sheet onto the replaceable mold 3. The motor 17 controls the lifting component 15 to move vertically downwards until the connecting hole 14 inside the mold frame 1 effectively engages with the sealing groove 19 of the lifting component 15. Then, start the external vacuum pump to vacuum... The vacuum pump completely absorbs the air from the internal space formed by the mold frame 1 and the lifting component 15 through the vacuum extraction pipe 13. Under the action of pressure, the softened plastic sheet on the replaceable mold 3 begins to fit the shape of the internal mold of the replaceable mold 3. The valve 12 is closed, so that the external vacuum pump can stop and reduce the usage time, thereby increasing the service life. When the specified time is reached, the valve 12 is opened, and the inside is in a normal pressure state. The lifting component 15 is quickly raised by the motor 17, which effectively increases the demolding rate. Moreover, the replaceable mold 3 can be freely replaced, thereby increasing the scope of use.

[0032] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermoforming mold that is easy to open and close, comprising a mold frame (1), a top lifting mold (2), and a replaceable mold (3), wherein the bottom end of the mold frame (1) is provided with the top lifting mold (2), characterized in that: The top lifting mold (2) can slide freely vertically in the upper half of the mold frame (1), and the mold frame (1) has a replaceable mold (3) on one side corresponding to the top lifting mold (2). The top lifting mold (2) consists of three parts: lifting component (15), threaded bushing (16) and motor (17). The threaded bushing (16) is an intermediate component. The threaded bushing (16) connects the lifting component (15) and the motor (17), and the threaded bushing (16) is connected to the threaded output shaft of the motor (17).

2. The easily openable and closeable vacuum forming mold according to claim 1, characterized in that: The mold frame (1) has four corner rods (4) at the top end, and a sliding groove (5) is opened on the opposite side of the rod (4). A rectangular connecting plate is provided at the top end of the rod (4). A mating hole (6) is opened in the center of the connecting plate, and four connecting holes are symmetrically distributed around the mating hole (6). A valve (12) is provided at the center of the bottom end face of the mold frame (1), and a vacuum extraction pipe (13) is provided on the horizontal end face of the valve (12). Support columns are provided at the four corners of the bottom end face of the mold frame (1).

3. The easily openable and closeable vacuum forming mold according to claim 2, characterized in that: The mold frame (1) has a mold groove (8) at the center of the end face of the corresponding rod (4) inside, and the mold groove (8) has a connecting hole (14) distributed symmetrically on both opposite sides. The mold frame (1) has a rubber sealing ring (7) at the end face of the corresponding rod (4) inside, and the mold groove (8) is inside the rubber sealing ring (7). The bottom end of the mold groove (8) has a set of vacuum extraction grooves (9) distributed equidistantly. The bottom of the vacuum extraction groove (9) has a set of extraction holes (10) distributed equidistantly. The extraction holes (10) are connected to the intermediate chamber (11) inside the mold frame (1). The end of the extraction hole (10) away from the vacuum extraction groove (9) is connected to the valve (12).

4. The easily openable and closeable vacuum forming mold according to claim 1, characterized in that: The output shaft of the motor (17) is connected to the mating hole (6) on the top of the mold frame (1).

5. The easily openable and closeable vacuum forming mold according to claim 1, characterized in that: The top end of the lifting component (15) is provided with a rectangular frame, and the top center of the rectangular frame is provided with a threaded bushing (16). The two opposite side walls of the lifting component (15) are provided with sliders (18) distributed in an axisymmetric manner. The sliders (18) are slidably connected with the slide groove (5). The bottom end of the lifting component (15) away from the motor (17) is provided with a sealing groove (19) that is connected to the rubber sealing ring (7).

6. The easily openable and closeable vacuum forming mold according to claim 1, characterized in that: The replaceable mold (3) has an extended connecting plate (20) on its two opposite side walls, and the two ends of the extended connecting plate (20) are provided with connecting holes two (21). The connecting holes two (21) are connected to the connecting holes one (14) by means of an adapter screw. The replaceable mold (3) has a specially made set of mold holes (22) inside, and the mold holes (22) are connected to the vacuum extraction groove (9).

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