Plastic suction mold for refrigerator door liner

Abstract

The utility model belongs to the technical field of plastic uptake molds, and particularly relates to a refrigerator door liner plastic uptake mold which comprises a processing table, a portal frame, a vacuum pump, a rotating seat and an upper mold seat, wherein the rotating seat is rotatably mounted in the processing table, lower mold seats are arranged on the left and right sides of the top end of the rotating seat, the left side of the processing table is a cooling area, the right side of the processing table is a plastic uptake area, and a heater is arranged above the upper mold seat; the piston is arranged in the smooth through groove, an ejector rod is arranged on the piston and used for ejecting the forming inner container, an air inlet channel with the top end communicating with the smooth through groove is formed in the bottom end of the lower mold base, and the air inlet channel is used for guiding air blown out by the fan into the smooth through groove. According to the plastic uptake die, plastic uptake machining is carried out alternately through the two lower die bases, the idle time of a vacuum pump and a heater is shortened, and the overall plastic uptake machining rate is increased; and secondly, the inner container can be cooled and demolded, and the demolding and cooling speed of the inner container is increased.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum forming mold technology, and in particular relates to a vacuum forming mold for refrigerator door liner. Background Technology

[0002] A refrigerator is a common household refrigeration device. Its main function is to keep food fresh, extend its shelf life, and facilitate the classification, storage, and cooking of food. The refrigerator door liner is an important component of the refrigerator. It usually forms the internal storage space of the refrigerator together with the inner liner. When manufacturing the refrigerator door liner, it needs to be shaped by a vacuum forming mold.

[0003] Currently, after the existing vacuum forming mold is completed, it is necessary to wait for the workpiece to cool completely and be removed before the second vacuum forming process can be carried out. During the time of waiting for the workpiece to cool and be removed, the vacuum forming equipment is idle and cannot be fully utilized for processing and production, which affects the overall production efficiency. In addition, during the waiting process, the vacuum forming equipment may still be running or in standby mode, which will consume energy and increase the production cost of enterprises.

[0004] To address the aforementioned issues, this application proposes a vacuum forming mold for the inner liner of a refrigerator door. Utility Model Content

[0005] The purpose of this utility model is to provide a vacuum forming mold for refrigerator door liners, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a vacuum forming mold for a refrigerator door liner, including a processing table and a gantry frame above it. A vacuum pump is located on the right side below the processing table. A rotating seat is rotatably installed inside the processing table, and lower mold seats are located on both the left and right sides of its top. The left side of the processing table is a cooling area with a cooling fan above it, and the right side is a vacuum forming area with an upper mold seat above it. A heater is installed below the upper mold seat. The rotating seat rotates to drive the two lower mold seats to alternately appear in the cooling area and the vacuum forming area. A piston is set in a smooth groove on the left and right sides of the lower mold seat, and a push rod is provided on it to lift the formed liner. An air inlet is opened at the bottom of the lower mold seat and the top end is connected to the smooth groove. The air inlet is used to introduce air blown by the fan into the smooth groove, so that a pressure difference is generated on the upper and lower sides of the piston, which drives the push rod to move upward.

[0008] Furthermore, the bottom end of the lower mold base has a hole that communicates with the air inlet channel, the suction end of the vacuum pump is connected to the blister tube through a hose, the air delivery end of the blower is connected to the air delivery cylinder through a hose, and air holes are provided on both sides of the air delivery cylinder for communicating with the air inlet channel. The outer diameter of the blister tube and the air delivery cylinder is the same as the diameter of the hole opened in the lower mold base.

[0009] Furthermore, the bottom surface of the smooth groove is provided with a spring that is connected to the bottom surface of the piston, and the spring is used to drive the piston to reset.

[0010] Furthermore, a lifting seat is provided below the rotating seat, and the blister tube and air cylinder both pass through the lifting seat. The left and right sides of the bottom surface of the lifting seat are respectively connected to the output end of the flashlight push rod. The electric push rod drives the blister tube and air cylinder to move upward and insert into the hole opened in the lower mold base.

[0011] Furthermore, positioning grooves are provided on both the left and right sides of the bottom surface of the rotating seat, and positioning blocks that cooperate with the positioning grooves are provided on both the left and right sides of the top surface of the lifting seat. The positioning blocks on both sides of the top surface of the lifting seat are respectively penetrated by an air supply cylinder and a blister tube.

[0012] Furthermore, the processing table has an annular groove that is slidably connected to sliding blocks on both sides of the rotating seat. Two meshing bevel gears are provided below the rotating seat. One bevel gear is installed below the rotating seat through a fixed shaft, and the other is driven by a motor below the processing table. The lifting seat has a clearance groove for avoiding the bevel gear.

[0013] Furthermore, the lower mold base has a downward-facing placement groove for placing the raw material plate, and the ejector rod passes through the bottom surface of the placement groove. The upper mold base has a fixed pressure frame that cooperates with the placement groove. When the lower mold base and the upper mold base are closed, the fixed pressure frame presses the raw material plate tightly into the placement groove.

[0014] Furthermore, the lower mold base is provided with a mold core and an electric push rod, and the bottom surface of the mold core is connected to the output end of the electric push rod.

[0015] This utility model has the following beneficial effects:

[0016] This invention uses the rotation of a rotating base to exchange the positions of two lower mold bases. After the inner liner in one lower mold base is vacuum-formed, it can rotate to the underside of the cooling fan for cooling and demolding. At the same time, the other lower mold base rotates to the underside of the upper mold base for inner liner vacuum-forming. This reduces the idle time of the vacuum pump and heater, increases their usage frequency, and allows them to be fully utilized, thereby improving the overall production rate of the inner liner. In addition, the reduced idle time of the heater reduces its standby time and energy consumption.

[0017] This invention involves rotating the molded inner liner to the cooling zone. A cooling fan increases the cooling rate of the inner liner, and a fan sends air into the smooth channel, causing the pressure below the piston to be greater than the pressure above the piston. The piston gradually rises, driving the ejector rod upward to lift the inner liner for demolding, thus increasing the demolding speed. During the cooling process, the inner liner is lifted and detached from the lower mold base. Therefore, while the cooling fan is cooling the inner liner, the lower mold base still retains some heat, allowing it to be directly used for thermoforming without preheating. This accelerates the softening rate of the next raw material sheet, increases the thermoforming speed of the inner liner, and speeds up the production rate of the inner liner.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the processing table of this utility model;

[0022] Figure 3 This is a cross-sectional view of the rotating seat and lower mold base of this utility model;

[0023] Figure 4 This is a schematic diagram of the lifting seat structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the upper mold base structure of this utility model;

[0025] The attached diagram lists the components represented by each number as follows:

[0026] In the diagram: 1. Processing table; 2. Rotating seat; 3. Lower mold base; 301. Placement groove; 302. Smooth through groove; 303. Air inlet; 4. Upper mold base; 5. Lifting seat; 501. Clearance groove; 6. Blister tube; 7. Air supply cylinder; 8. Piston; 9. Ejector rod; 10. Heater; 11. Fixed pressure frame; 12. Mold core; 13. Bevel gear. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Please see Figure 1-5 As shown, this utility model is a refrigerator door liner vacuum forming mold, including a processing table 1 and a gantry frame above it. A vacuum pump is provided on the right side below the processing table 1. A rotating seat 2 is rotatably installed inside the processing table 1, and lower mold seats 3 are provided on both the left and right sides of its top. The left side of the processing table 1 is a cooling area with a cooling fan above it, and the right side is a vacuum forming area with an upper mold seat 4 above it. A heater is installed below the upper mold seat 4. The rotating seat 2 rotates to drive the two lower mold seats 3 to alternately appear in the cooling area and the vacuum forming area. A piston 8 is set in the smooth through grooves 302 on the left and right sides of the lower mold seat 3, and a push rod 9 is provided on it to lift the formed liner. The bottom end of the lower mold seat 3 has an air inlet 303 that communicates with the top of the smooth through groove 302. The air inlet 303 is used to introduce the air blown by the fan into the smooth through groove 302, so that the piston 8 generates a pressure difference on the upper and lower sides, which drives the push rod 9 to move upward.

[0030] This embodiment provides a vacuum forming mold. An electric push rod with its output end connected to the upper mold base 4 is located above the gantry frame. A cooling fan is connected to the gantry frame via a fixed shaft. The rotation of the rotating base 2 causes the positions of the two lower mold bases 3 to exchange. After the inner liner in one lower mold base 3 is vacuum-formed, it can rotate to the area under the cooling fan for cooling and demolding. Simultaneously, the other lower mold base 3 rotates to the area under the upper mold base 4 to prepare for the next round of inner liner vacuum forming. This effectively reduces the idle time of the vacuum pump and heater, improving their efficiency. To improve efficiency and ensure maximum utilization, the overall production process of the inner liner is accelerated. After the molded inner liner rotates to the cooling area, the cooling rate of the inner liner is accelerated by the cooling fan. Air is sent into the smooth channel 302 by the fan, creating a pressure difference between the upper and lower sides of the piston 8. This causes the piston 8 and the ejector rod 9 to move vertically upward, lifting the molded inner liner and demolding it, thus accelerating the demolding rate. During the cooling process, the inner liner is demolded and separated from the lower mold base 3, leaving some heat in the lower mold base 3. It can be put into the next thermoforming without preheating, thus improving the softening rate of the raw material board.

[0031] The lower mold base 3 has a hole at its bottom end that connects to the air inlet 303. The vacuum pump's suction end is connected to the vacuum forming tube 6 via a hose, and the blower's air delivery end is connected to the air delivery cylinder 7 via a hose. The air delivery cylinder 7 has air holes on both sides for connecting to the air inlet 303. The outer diameters of the vacuum forming tube 6 and the air delivery cylinder 7 are the same as the diameter of the hole in the lower mold base 3. The vacuum forming tube 6 can extend into the hole, allowing the vacuum pump to perform vacuum forming on the raw material sheet inside the lower mold base. The air delivery cylinder 7 can extend into the hole, allowing the air holes to connect to the air inlet 303, enabling the blower to deliver air into the smooth channel 302.

[0032] The bottom surface of the smooth groove 302 is provided with a spring that is connected to the bottom surface of the piston 8. The spring is used to drive the piston 8 to reset. The spring enables the piston 8 to reset quickly, preparing for the next demolding.

[0033] The rotating seat 2 is provided with a lifting seat 5 below it. The blister tube 6 and the air cylinder 7 both pass through the lifting seat 5. The left and right sides of the bottom surface of the lifting seat 5 are respectively connected to the output end of the flashlight push rod. The electric push rod drives the blister tube 6 and the air cylinder 7 to move upward and insert into the hole opened in the lower mold seat 3. The electric push rod drives the blister tube 6 and the air cylinder 7 to rise and fall into the cavity opened in the lower mold seat 3 to carry out the blister forming and demolding work.

[0034] The rotating seat 2 has positioning grooves on both the left and right sides of its bottom surface, and the lifting seat 5 has positioning blocks on both the left and right sides of its top surface that cooperate with the positioning grooves. The positioning blocks on both sides of the top surface of the lifting seat 5 are respectively penetrated by the air supply cylinder 7 and the blister tube 6.

[0035] The processing table 1 has an annular groove that is slidably connected to the sliding blocks 10 on both sides of the rotating seat 2. The rotating seat 2 has two meshing bevel gears 13 below it. One bevel gear 13 is mounted below the rotating seat 2 via a fixed shaft, and the other is driven by a motor below the processing table 1. The lifting seat 5 has a clearance groove 501 for avoiding the bevel gear 13. The motor drives the bevel gear 13 to rotate, thereby driving the rotating seat 2 to rotate.

[0036] The lower mold base 3 has a downward-facing placement groove 301 for placing the raw material plate. The ejector rod 9 passes through the bottom surface of the placement groove 301. The upper mold base 4 has a fixing frame 11 on its lower side that cooperates with the placement groove 301. When the lower mold base 3 and the upper mold base 4 are closed, the fixing frame 11 presses the raw material plate tightly into the placement groove 301. The fixing frame 11 fixes the raw material plate. If the raw material plate falls off during the vacuum forming process, the vacuum forming will fail.

[0037] The lower mold base 3 is provided with a mold core 12 and an electric push rod. The bottom surface of the mold core 12 is connected to the output end of the electric push rod. The electric push rod drives the mold core 12 to move upward, so that the softened raw material plate is formed on the mold core 12.

[0038] It is understandable that this utility model reduces the idle time of the vacuum pump and heater by alternating between two lower mold bases 3 for vacuum forming, thereby improving the overall vacuum forming speed; secondly, it can cool and demold the inner liner, thereby improving the demolding and cooling rate of the inner liner.

[0039] A specific application of the operation process in this embodiment is as follows: The raw material board is placed in the placement slot 301. The rotating seat 2 is rotated by the motor, so that the two lower mold seats 3 are respectively below the upper mold seat 4 and the cooling fan. Then, the electric push rod is driven to move the lifting seat 5 upward, so that the vacuum forming tube 6 and the air supply cylinder 7 are respectively inserted into the holes opened at the bottom of the lower mold seat 3. The air holes at both ends of the air supply cylinder 7 are connected to the air inlet 303. The electric push rod is driven to move the upper mold seat 4 downward and close the mold with the lower mold seat 3. The heater is turned on to soften the raw material board. Then, the electric push rod drives the mold core 12 to rise so that the raw material board is formed on the mold core 12. The vacuum pump is driven to vacuum form the raw material board. After the vacuum forming process is completed, the electric push rod moves the upper mold seat 4 upward and separates it from the lower mold seat 3, and the lifting seat 5 moves downward to move the vacuum forming tube 6 and the air supply cylinder 7 away from the lower mold seat. 3. The drive motor drives the two lower mold bases 3 to switch positions, and repeats the above steps to perform the vacuum forming work. At the same time, the cooling fan is turned on to cool down the inner liner after vacuum forming. When the air supply cylinder 7 is inserted into the lower mold base 3, the inner liner has met the demolding conditions but still has a high temperature. The fan is turned on and the fan sends air into the smooth channel 302, so that the piston 8 is formed on both sides, which drives the piston 8 and the ejector rod 9 to move upward, lifting the inner liner and separating it from the lower mold base 3 to complete the demolding work. After the ejector rod 9 lifts the inner liner, the lower mold base 3 still has some heat. During the subsequent cooling process of the inner liner, since the inner liner is separated from the lower mold base, the heat on the lower mold base 3 will not be lost in large quantities, so the lower mold base 3 can be used directly without preheating. Moreover, due to the separation of the inner liner from the lower mold base 3, the cooling rate of the inner liner will be increased.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A refrigerator door liner blow molding mold, comprising a processing table (1) and a gantry above it, characterized in that: a rotating seat (2) is rotatably installed in the processing table (1), and the top end of the rotating seat (2) is provided with a lower mold seat (3) on both sides; the left side of the processing table (1) is a cooling area and is provided with a cooling fan above; the right side is a blow molding area and is provided with an upper mold seat (4) above; a heater is installed below the upper mold seat (4); the rotating seat (2) is rotated to drive the two lower mold seats (3) to appear alternately in the cooling area and the blow molding area; a piston (8) is arranged in a smooth through slot (302) on both sides of the lower mold seat (3), and a top rod (9) is arranged on the piston (8) to lift the formed liner; an air inlet (303) is arranged at the bottom end of the lower mold seat (3) and communicates with the smooth through slot (302); the air inlet (303) is used to introduce air blown by the fan into the smooth through slot (302), so that the piston (8) generates a pressure difference on both sides to drive the top rod (9) to move upward. The bottom end of the lower mold seat (3) is provided with a hole communicating with the air inlet (303); the suction end of the vacuum pump communicates with the blow molding pipe (6) through a hose; the air supply end of the fan communicates with the air supply cylinder (7) through a hose; the air supply cylinder (7) is provided with air holes on both sides for communication with the air inlet (303); the outer diameters of the blow molding pipe (6) and the air supply cylinder (7) are the same as the diameters of the holes arranged in the lower mold seat (3). The bottom surface of the smooth through slot (302) is provided with a spring connected to the bottom surface of the piston (8), and the spring is used to drive the piston (8) to reset.

2. The icebox door inner container blow molding mold according to claim 1, characterized in that: The bottom of the rotating seat (2) is provided with a lifting seat (5), and the blow molding pipe (6) and the air supply cylinder (7) penetrate the lifting seat (5); the bottom surface of the lifting seat (5) is connected with the output ends of the electric cylinder push rods on both sides, respectively; the blow molding pipe (6) and the air supply cylinder (7) are driven by the electric push rods to move upward and insert into the holes arranged in the lower mold seat (3).

3. The icebox door inner container blow molding mold according to claim 2, characterized in that: The bottom surface of the rotating seat (2) is provided with a positioning groove on both sides; the top surface of the lifting seat (5) is provided with a positioning block on both sides, respectively, which cooperates with the positioning groove; the positioning blocks on both sides of the top surface of the lifting seat (5) are penetrated by the air supply cylinder (7) and the blow molding pipe (6), respectively.

4. The icebox door inner container blow molding mold according to claim 2, characterized in that: The processing table (1) is provided with a ring groove and a sliding block (10) arranged on both sides of the rotating seat (2) for sliding connection; two bevel gears (13) are arranged below the rotating seat (2), one of which is installed below the rotating seat (2) through a fixed shaft, and the other is driven by a motor below the processing table (1); the lifting seat (5) is provided with an avoiding groove (501) for avoiding the bevel gears (13).

5. The icebox door inner container blow molding mold according to claim 4, characterized in that: The top surface of the lower mold seat (3) is downwardly provided with a placing groove (301) for placing a raw material plate; the top rod (9) penetrates the bottom surface of the placing groove (301); the lower surface of the upper mold seat (4) is provided with a fixed pressing frame (11) cooperating with the placing groove (301); when the lower mold seat (3) and the upper mold seat (4) are combined, the fixed pressing frame (11) presses the raw material plate in the placing groove (301).

6. The icebox door inner container blow molding mold according to claim 4, wherein: ​ 7. The icebox door inner container blow molding mold according to claim 2, characterized in that: ​ 8. The icebox door inner container blow molding mold according to claim 1, characterized in that: The lower die base (3) is provided with a die core (12) and an electric push rod, and the bottom surface of the die core (12) is connected with the output end of the electric push rod.

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