A precision preheating device for melamine molding dies

Abstract

This utility model discloses a precise preheating device for melamine molding dies, comprising: a heating box, with pull rods at each of the four corners of the heating box; an adjustment groove inside each pull rod; several positioning grooves on the sidewalls of each adjustment groove; a contact block inside each positioning groove; a connecting bolt slidably connected inside each contact block; an adjusting nut threadedly connected to the outer surface of each connecting bolt, with the adjusting nut contacting the outer surface of the contact block; a connecting rotating block fixedly connected to the end of the connecting bolt away from the adjusting nut; connecting rods on both the left and right sides of the sidewalls of the connecting rotating block; a mating groove on the outer surface of each connecting rod; and a die hook rotatably connected to the inner wall of the mating groove. Through an integrated design of adjustable positioning, mechanical locking, flexible loading and unloading, and stable support, this device solves the core problems of traditional die preheating devices, namely "poor specification adaptability, low adjustment efficiency, and uneven force."

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a precision preheating device for melamine molding molds. Background Technology

[0002] Traditional melamine tableware molding machines often use electric heating plates to heat the molds. The heating plates are installed between the work platform and the machine mold base, and heat is transferred to the molds through the work platform. In this method, the heating plates use a relatively low constant power to continuously heat the molds. The mold temperature stops rising and reaches the rated preheating temperature only when the heat absorbed by the mold from the heating plate and the heat dissipated to the outside reaches thermal equilibrium. The entire preheating process is time-consuming, affecting production efficiency.

[0003] During the use of the precision preheating device for melamine molding molds, the poor compatibility of different mold specifications and the difficulty in adjustment lead to resource waste. Although the existing partition has ventilation holes, it still causes uneven heating. Utility Model Content

[0004] The purpose of this utility model is to provide a precise preheating device for melamine molding dies. Through an integrated design of adjustable positioning, mechanical locking, flexible loading and unloading, and stable support, it solves the core problems of "poor specification adaptability, low adjustment efficiency, and uneven heating" in traditional die preheating devices. It achieves precise positioning, rapid switching, and uniform heating in the die preheating process, and is especially suitable for multi-die, high-cycle production scenarios in the melamine products industry, thereby improving the overall efficiency of the equipment.

[0005] To achieve the above objectives, a precise preheating device for melamine molding dies is provided, comprising: a heating chamber, wherein pull rods are provided at each of the four corners of the heating chamber, and adjusting grooves are provided inside the pull rods. Several positioning grooves are provided on the side walls of the adjusting grooves, and an abutting block is abutted inside each positioning groove. A connecting bolt is slidably connected inside the abutting block, and an adjusting nut is threadedly connected to the outer surface of the connecting bolt, with the adjusting nut abutting against the outer surface of the abutting block. A connecting rotating block is fixedly connected to the end of the connecting bolt away from the adjusting nut. Connecting rods are connected to the left and right sides of the side walls of the connecting rotating block, and mating grooves are provided on the outer surfaces of the connecting rods. A die hook is rotatably connected to the inner wall of the mating groove. This multi-level adjustable structure enables precise positioning and flexible loading and unloading of the die hook, improving preheating adaptability and operational efficiency.

[0006] According to the aforementioned precision preheating device for melamine molding dies, the interior of the positioning groove and the interior of the adjusting slide are connected, and the number of positioning grooves corresponds to the number of molds. The connected structure and the multi-positioning groove design meet different height adjustment requirements and enhance the device's compatibility with molds of various specifications.

[0007] According to the aforementioned precise preheating device for melamine molding dies, the interior of the adjusting groove is connected to both the front and rear sides of the pull rod, and the cross-section of the die hook is U-shaped. The through-type design facilitates multi-directional operation, and the U-shaped hook increases the contact area, improving pulling stability and ease of loading and unloading.

[0008] According to the aforementioned precise preheating device for melamine molding dies, the front surface of the heating chamber has two fitting grooves, and each of the two fitting grooves is equipped with a movable frame. The fitting grooves and the movable frames cooperate to form a guiding structure, ensuring that the pull rod smoothly enters and exits the heating chamber, thus guaranteeing the installation accuracy of the mold.

[0009] According to the aforementioned precise preheating device for melamine molding dies, the upper surface of the movable frame is fixedly connected to the pull rod, and connecting wheels are fixedly connected to the four corners of the lower surface of the movable frame. This rigid connection and wheel design enables synchronous movement of the pull rod and the movable frame, reducing sliding resistance and improving structural stability.

[0010] According to the aforementioned precise preheating device for melamine molding dies, the front surface of the heating chamber is provided with a door, and the lower surface of the door abuts against the movable frame. The door abuts against the movable frame to form a sealing structure, reducing heat loss while limiting the movement of the movable frame and ensuring the preheating effect.

[0011] According to the aforementioned melamine molding die precision preheating device, the lower surface of the heating box is fixedly connected to four corners with device moving wheels, and the four connecting moving wheels are all located between the four device moving wheels. This four-point support layout optimizes the center of gravity distribution, prevents the moving frame from tipping over, and improves the overall stability of the equipment.

[0012] According to the aforementioned precise preheating device for melamine molding dies, a controller is fixedly connected to the side wall of the heating chamber, and a heating and ventilation device is fixedly connected to the rear surface of the heating chamber. The controller and the heating and ventilation device work together to achieve precise temperature control and airflow circulation, ensuring uniform heating of the mold and improving preheating quality.

[0013] The above-mentioned solution has the following beneficial effects:

[0014] This utility model incorporates a pull rod, adjusting slide, positioning groove, contact block, connecting bolt, adjusting nut, connecting rotating block, connecting rod, mating groove, and mold hook. Through an integrated design that features adjustable positioning, mechanical locking, flexible loading and unloading, and stable support, it solves the core problems of traditional mold preheating devices, such as poor specification adaptability, low adjustment efficiency, and uneven force distribution. It achieves precise positioning, rapid switching, and uniform heating during the mold preheating process, making it particularly suitable for multi-mold, high-cycle production scenarios in the melamine product industry, thereby improving the overall efficiency of the equipment.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a perspective view of a precision preheating device for melamine molding dies according to the present invention.

[0018] Figure 2 This is a front view of a precision preheating device for melamine molding dies according to the present invention.

[0019] Figure 3 This is a cross-sectional perspective view of a precision preheating device for melamine molding dies according to the present invention;

[0020] Figure 4 For utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0021] Legend:

[0022] 1. Heating box; 2. Heating and ventilation device; 3. Device moving wheels; 4. Moving frame; 5. Fitting groove; 6. Connecting moving wheels; 7. Box door; 8. Controller; 9. Adjusting slide; 10. Positioning groove; 11. Abutting block; 12. Adjusting nut; 13. Connecting bolt; 14. Connecting rotating block; 15. Connecting rod; 16. Mold hanging buckle; 18. Pulling rod. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4This utility model discloses a precise preheating device for melamine molding dies, comprising: a heating box 1, with pull rods 18 at each of the four corners of the heating box 1. The pull rods 18 serve as the internal support frame of the heating box 1, providing an installation reference for adjustment structures such as adjustment grooves 9 and positioning grooves 10, ensuring the stability and reliability of the height adjustment system of the die hook 17. Adjustment grooves 9 are provided inside the pull rods 18, providing a longitudinal moving track for the connecting bolts 13 and the contact blocks 11, thus providing a physical carrier for the height adjustment of the die hook 17. Several positioning grooves 1 are provided on the side walls of the adjustment grooves 9. 0. The positioning groove 10 and the abutment block 11 form a locking structure. Through the groove division with preset spacing, the mold hook 17 can be accurately positioned at different heights. Each positioning groove 10 has an abutment block 11 inside, and the abutment block 11 is embedded in the positioning groove 10 to form a mechanical lock, preventing the connecting bolt 13 from sliding after adjustment and ensuring that the position of the mold hook 17 is fixed. The connecting bolt 13 is slidably connected inside the abutment block 11. The connecting bolt 13 passes through the abutment block 11 and cooperates with the adjusting nut 12. The axial movement of the bolt drives the separation or locking of the abutment block 11 from the positioning groove 10, realizing the adjustment function. Yes, the outer surface of the connecting bolt 13 is threaded with an adjusting nut 12, and the adjusting nut 12 abuts against the outer surface of the contact block 11. The adjusting nut 12, by tightening, presses the contact block 11 to lock it into the positioning groove 10, and by loosening it, it releases the contact block 11 for adjustment, forming a controllable locking mechanism. The end of the connecting bolt 13 away from the adjusting nut 12 is fixedly connected to a connecting rotating block 14. The connecting rotating block 14 serves as the end pivot, providing a rotation fulcrum for the connecting rod 15, so that the mold hook 17 can rise and fall synchronously with the height change of the connecting bolt 13. The left and right sides of the side wall of the connecting rotating block 14 are connected to connecting... The connecting rod 15 rigidly connects the connecting rotating block 14 to the mold hook 17, transmitting the adjustment force of the connecting bolt 13 to ensure the height consistency of the mold hook 17. The outer surface of the connecting rod 15 is provided with a mating groove 16, which is clearance-fitted with the rotating shaft of the mold hook 17, allowing the mold hook 17 to rotate within the groove to meet the angle fine-tuning requirements during mold installation. The inner wall of the mating groove 16 is rotatably connected to the mold hook 17. The mold hook 17 achieves the opening and closing of the U-shaped opening through rotational connection, facilitating the quick mounting and dismounting of the four corners of the mold. Its rotational freedom improves the ease of operation.

[0025] The interior of the positioning groove 10 is connected to the interior of the adjusting slide 9. This connection allows the contact block 11 to slide freely within the adjusting slide 9 to any positioning groove 10, ensuring continuous height adjustment and no dead-angle coverage. The number and distribution of the positioning grooves 10 correspond to the mold specifications. Multiple sets of equidistantly distributed positioning grooves 10 meet the preheating height requirements of molds of different thicknesses and sizes, improving the versatility of the device. The interior of the adjusting slide 9 is connected to both the front and rear sides of the pull rod 18. This through-type design allows operators to operate the connecting bolts 13 from both sides of the heating box 1, adapting to different operating angles at different workstations. The mold hook 17 has a U-shaped cross-section. The U-shaped structure increases the contact area with the mold. The hook design on both sides improves the pulling stability and facilitates the embedding and fixing of the mold edge. Two openings are made on the front surface of the heating box 1. The fitting groove 5 provides a linear guide rail for the moving frame 4, ensuring that the moving frame 4 drives the pull rod 18 smoothly in and out of the heating box 1, avoiding shaking that could affect the mold positioning. The two fitting grooves 5 are each equipped with a moving frame 4. The moving frame 4 serves as a support platform for the pull rod 18 and is slidably connected to the heating box 1 through the fitting groove 5, enabling control of the opening and closing of the mold installation space. The upper surface of the moving frame 4 is fixedly connected to the pull rod 18. This rigid connection makes the moving frame 4 and the pull rod 18 form an integral unit, ensuring that the pull rod 18 moves synchronously when the moving frame 4 moves, maintaining the mold position accuracy. The lower surface of the moving frame 4 is fixedly connected to four corners with connecting moving wheels 6. The connecting moving wheels 6 support the moving frame 4 and reduce sliding resistance. Together with the layout of the moving wheels 3, they form a relative moving system between the moving frame 4 and the heating box 1.

[0026] The front surface of the heating chamber 1 is provided with a door 7, and the lower surface of the door 7 abuts against the movable frame 4. When the door 7 is closed, it forms a sealing surface by abutting against the movable frame 4, preventing heat leakage from the interior of the heating chamber 1 and limiting the movement of the movable frame 4. Each of the four corners of the lower surface of the heating chamber 1 is fixedly connected to a device movable wheel 3, which provides the overall movement capability of the heating chamber 1. The four-point support layout of the device movable wheel 3 and the connecting movable wheel 6 (the connecting movable wheel 6 is located inside the device movable wheel 3) enhances the stability of the equipment. The four connecting movable wheels 6 are all located between the four device movable wheels 3. This layout ensures that the center of gravity of the movable frame 4 falls within the bottom support area of ​​the heating chamber 1, preventing the movable frame 4 from tipping over due to a shift in the center of gravity when it extends. A controller 8 is fixedly connected to the side wall of the heating chamber 1. The controller 8 serves as a central control unit, connecting to the heating and ventilation device 2, temperature sensors, and other components to achieve precise setting and dynamic control of preheating parameters. The rear surface of the heating chamber 1 is fixed... The heating and ventilation device 2 is connected to the heating chamber 1. The heating and ventilation device 2 circulates preheated airflow, which, together with the sealing structure of the door 7, creates a uniform temperature field inside the heating chamber 1, ensuring that the mold is heated evenly. The connecting moving wheels 6 and the device moving wheels 3 are not easy to move and require manual or external power to move. The damping design of the two types of moving wheels prevents the equipment from being moved accidentally. The manual or power-driven mode ensures the controllability and safety of the positioning operation. The adjusting nut 12 will not easily fall off when in the right position and needs to be adjusted before each operation. The locking design between the adjusting nut 12 and the contact block 11 prevents loosening. The adjustment before operation can be adapted to different mold heights, ensuring the flexibility of the preheating process. The mold hooks 17 are distributed at the four corners to effectively pull the mold and preheat it. The symmetrically distributed mold hooks 17 at the four corners offset the mold deformation by balancing the force. Together with the airflow circulation of the heating and ventilation device 2, the mold is stably and evenly preheated.

[0027] Working principle: First, push the device's moving wheels 3 at the bottom of the heating box 1 to move the equipment to the designated work position. Since the device's moving wheels 3 require manual or external power to drive, ensure that the equipment is stable and does not slip after positioning. Confirm that the box door 7 on the front surface of the heating box 1 is in the open state. At this time, the moving frame 4 slides outward along the fitting groove 5 through the bottom connecting moving wheels 6 (which need to be pushed manually), exposing the internal space of the heating box, which is convenient for installing the mold. Adjust the height of the mold hook. According to the mold specifications, rotate the adjusting nut 12 to loosen the pressure on the contact block 11, so that the continuous When the connecting bolt 13 drives the contact block 11 to disengage from the positioning groove 10, the connecting rotating block 14, connecting rod 15, and mold hook 17 can slide up and down in the adjusting slide groove 9 with the connecting bolt 13. After adjusting the mold hook 17 to a suitable height, tighten the adjusting nut 12 in the opposite direction. The contact block 11 is locked in position by embedding into the corresponding positioning groove 10, ensuring that the mold hook 17 is stable and does not shift during the preheating process. Rotate the mold hook 17 (which is rotatably connected to the connecting rod 15 through the mating groove 16) to open the U-shaped opening and hook the four corners of the mold onto it. On the four mold hooks 17, the uneven force on the mold is offset by symmetrical traction. After confirming that the mold is firmly mounted, the moving frame 4 is pushed to slide into the heating box 1 along the fitting groove 5 until the traction rod 18 on the upper surface of the moving frame 4 is fully inserted into the heating box. At this time, the connecting moving wheel 6 is located between the four device moving wheels 3 to ensure the stability of the moving frame's center of gravity. The box door 7 is closed so that its lower surface abuts against the moving frame 4 to form a sealed structure to reduce heat loss. At the same time, the box door limits the moving frame. The preheating temperature, time and other parameters are set by the controller 8, and the heating and ventilation device 2 is started. It delivers preheating air to the rear surface and circulates air to make the temperature inside the heating box 1 uniform. The mold fixed by the mold hooks 17 is evenly heated under the four corner traction state. After the preset preheating time is reached, the controller 8 automatically turns off the heating function, opens the box door 7 and pushes the moving frame 4 to slide outward to expose the mold. The mold hooks 17 are rotated again to open the U-shaped opening and the mold is removed. Then, according to the specifications of the next batch of molds, the height of the adjusting nut 12 and the mold hooks 17 are repeatedly adjusted to enter the next working cycle.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A precision preheating device for melamine molding dies, comprising: A heating box (1) is characterized in that: a pull rod (18) is provided at each of the four corners inside the heating box (1), an adjustment groove (9) is provided inside the pull rod (18), a number of positioning grooves (10) are provided on the side wall of the adjustment groove (9), a contact block (11) is abutted inside each positioning groove (10), a connecting bolt (13) is slidably connected inside the contact block (11), an adjusting nut (12) is threadedly connected to the outer surface of the connecting bolt (13), and the adjusting nut (12) abuts against the outer surface of the contact block (11), a connecting rotating block (14) is fixedly connected to the end of the connecting bolt (13) away from the adjusting nut (12), a connecting rod (15) is connected to the left and right sides of the side wall of the connecting rotating block (14), a mating groove (16) is provided on the outer surface of the connecting rod (15), and a mold hook (17) is rotatably connected to the inner wall of the mating groove (16).

2. The precision preheating device for melamine molding dies according to claim 1, characterized in that: The interior of the positioning groove (10) is connected to the interior of the adjustment slide (9), and the number of positioning grooves (10) is set accordingly.

3. The precision preheating device for melamine molding dies according to claim 1, characterized in that: The interior of the adjusting groove (9) is connected to the front and rear sides of the pull rod (18), and the cross-section of the mold hook (17) is U-shaped.

4. The precision preheating device for melamine molding dies according to claim 1, characterized in that: The front surface of the heating box (1) has two fitting grooves (5), and each of the two fitting grooves (5) is equipped with a movable frame (4).

5. The precision preheating device for melamine molding dies according to claim 4, characterized in that: The upper surface of the mobile frame (4) is fixedly connected to the pull rod (18), and the four corners of the lower surface of the mobile frame (4) are fixedly connected to the connecting wheels (6).

6. The precision preheating device for melamine molding dies according to claim 4, characterized in that: The front surface of the heating box (1) is provided with a box door (7), and the lower surface of the box door (7) abuts against the moving frame (4).

7. The precision preheating device for melamine molding dies according to claim 5, characterized in that: The lower surface of the heating box (1) is fixedly connected to four corners of the device moving wheels (3), and the four connecting moving wheels (6) are located between the four device moving wheels (3).

8. The precision preheating device for melamine molding dies according to claim 1, characterized in that: A controller (8) is fixedly connected to the side wall of the heating box (1), and a heating and ventilation device (2) is fixedly connected to the rear surface of the heating box (1).

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