A cyclic powder spraying device

Abstract

The present invention discloses a circulating powder sprinkling device, which comprises a machine frame. A powder loading mechanism for loading and collecting redundant hot melt powder is arranged on the machine frame, a circulating conveying mechanism through which a heat transfer substrate passes, at least one powder feeding mechanism that moves along with the circulating conveying mechanism and transports the hot melt powder in the powder loading mechanism above the heat transfer substrate, and at least one blocking mechanism arranged above the heat transfer substrate for tilting the powder feeding mechanism to sprinkle the hot melt powder on the heat transfer substrate. The hot melt powder is loaded and transported onto the heat transfer substrate by a hanging basket in the powder feeding mechanism, which can prevent the hot melt powder from undergoing morphological changes to form blocks or strips under the action of external forces, and improve the quality of the thermal transfer image of the product.

Description

[Technical field]

[0001] The invention relates to a circulating powder spreading device. [Background Technology]

[0002] Thermal transfer is also called heat transfer. Thermal transfer is generally done by first printing the pattern on a substrate such as a thermal transfer film, then sprinkling hot melt powder on the thermal transfer film, then cleaning the excess powder, and then hot melting and solidifying the hot melt powder on the thermal transfer film with the pattern, thereby obtaining a thermal transfer film with a pattern, and finally transferring the pattern to the fabric by heat pressing. Thermal transfer has the advantages of bright colors, rich layers, low production cost, and not easy to fade, so it has a broad market application scenario.

[0003] In the process of spreading hot melt powder, the current routine operation is to load enough hot melt powder on the powder spreading disk, and then intermittently shake the powder spreading disk so that the powder spreading disk can sprinkle enough hot melt powder according to the speed of thermal transfer. However, this conventional operation has the following defects: during thermal transfer, the operator needs to be on duty next to the equipment in real time. When the powder spreading disk is about to run out of hot melt powder, the excess hot melt powder in the bottom powder receiving box needs to be put back into the powder spreading disk to avoid powder shortage and affect the entire production process. In addition, manual duty is prone to errors and the degree of automation is low, resulting in high production costs and low production efficiency. Some powder spreading equipment automatically transports the hot melt powder in the bottom powder receiving box to the top powder spreading disk through a spiral rod, but the hot melt powder easily enters the bearing of the spiral rod, causing the hot melt powder to change shape into blocks or strips, which will affect the thermal transfer effect of the image after adhering to the thermal transfer film.

[0004] The present invention is produced based on the above problems. [Summary of the invention]

[0005] The present invention overcomes the shortcomings of the above-mentioned technology and provides a circulating powder sprinkling device, which can cyclically carry hot-melt powder to the thermal transfer film through a hanging basket and automatically recover excess hot-melt powder, thereby realizing a production process of circulating powder sprinkling. There is no need for manual equipment to add hot-melt powder, and the device has a high degree of automation and high production efficiency, greatly reduces production costs, is highly practical, and has great market competitiveness.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A circulating powder spreading device, characterized in that it includes a frame, on which is provided a powder loading mechanism for loading and collecting excess hot melt powder, a circulating conveying mechanism through which a thermal transfer substrate passes, at least one powder feeding mechanism that moves with the circulating conveying mechanism to transport the hot melt powder in the powder loading mechanism to above the thermal transfer substrate, and at least one blocking mechanism arranged above the thermal transfer substrate for tilting the powder feeding mechanism to sprinkle the hot melt powder on the thermal transfer substrate.

[0008] A circulating powder sprinkling device as described above, characterized in that: a powder shaking mechanism for shaking the heat transfer substrate on the frame to make the hot melt powder on the heat transfer substrate move to both sides is provided on the frame.

[0009] A circulating powder sprinkling device as described above, characterized in that: the circulating conveying mechanism includes multiple sets of runner groups arranged on the frame. Two conveyor belts arranged side by side and through which the heat transfer substrate passes are provided on the runner groups. One of the sets of runner groups is connected to a first transmission rod, and a first transmission wheel is provided at the other end of the first transmission rod. A conveying mechanism motor assembly whose rotating end is connected to the first transmission wheel through a belt to achieve synchronous rotation is provided on the frame.

[0010] A circulating powder sprinkling device as described above, characterized in that: the powder feeding mechanism includes a fixed rod fixedly connected between the two conveyor belts. A rotating rod whose upper end can rotate around the fixed rod is provided on the fixed rod. A hanging basket that tilts to load powder when moving on the powder loading mechanism is connected to the lower end of the rotating rod.

[0011] A circulating powder sprinkling device as described above, characterized in that: a limiting notch for limiting the position of the rotating rod is provided on the fixed rod. The hanging basket is a funnel-shaped hanging basket, and the lower end of the funnel-shaped hanging basket biases to the right.

[0012] A circulating powder sprinkling device as described above, characterized in that: the powder loading mechanism includes a guide rail provided on the frame and a drawer that can slide on the guide rail and can be pulled out from the side of the frame.

[0013] A circulating powder sprinkling device as described above, characterized in that: the powder shaking mechanism includes a second transmission rod provided on the frame and on one side of the heat transfer substrate. A shaking block for shaking the heat transfer substrate while rotating with the second transmission rod is provided on the second transmission rod. A second transmission wheel is provided at one end of the second transmission rod. A powder shaking mechanism motor whose rotating end is connected to the second transmission wheel through a belt is provided on the frame.

[0014] A circulating powder sprinkling device as described above, characterized in that: a blocking mechanism for tilting the powder feeding mechanism to reduce the loading amount of the hot melt powder is provided at the lower end of the ascending section of the circulating conveying mechanism on the frame.

[0015] A circulating powder sprinkling device as described above, characterized in that: cover plates are respectively provided above the upper lateral conveying section and the lower lateral conveying section of the circulating conveying mechanism on the frame. The blocking mechanism provided above the heat transfer substrate is provided on the cover plate above the upper lateral conveying section of the circulating conveying mechanism. There are two blocking mechanisms provided above the heat transfer substrate and their blocking heights are different.

[0016] A circulating powder sprinkling device as described above, characterized in that: the blocking mechanism is a stop block.

[0017] The beneficial effects of the present invention are:

[0018] 1. In the present invention, the hanging basket in the powder feeding mechanism is used to load and transport the hot-melt powder onto the heat transfer substrate, which can prevent the hot-melt powder from changing its form into lumps or strips under the action of external forces, and improve the quality of the heat transfer image of the product.

[0019] 2. The powder loading mechanism of the present invention recovers the excess hot-melt powder on the heat transfer substrate, and transports the hot-melt powder in the powder loading mechanism to the heat transfer substrate through the powder feeding mechanism, realizing the automatic cyclic powder spraying function. At the same time, it ensures that there is enough hot-melt powder in the powder loading mechanism, well avoiding the situation of lack of powder during powder spraying. There is no need for manual operation to add hot-melt powder, with high automation degree, high production efficiency, greatly reducing the production cost, strong practicability and large market competitiveness.

[0020] 3. The present invention shakes the heat transfer substrate through the powder shaking mechanism, so that the hot-melt powder on the heat transfer substrate moves to both sides, and the hot-melt powder is evenly laid on the heat transfer substrate, ensuring that the heat transfer substrate fully adheres to the hot-melt powder. [Description of the Drawings]

[0021] Figure 1 is a schematic diagram of the present invention;

[0022] Figure 2 is a schematic diagram of the present invention with the frame omitted;

[0023] Figure 3 is an exploded view of the present invention with the frame omitted;

[0024] Figure 4 is a schematic diagram of the shaking mechanism of the present invention;

[0025] Figure 5 is a schematic diagram of the hanging basket of the powder feeding mechanism of the present invention;

[0026] Figure 6 is a schematic diagram of the powder loading mechanism of the present invention;

[0027] Figure 7 is an exploded view of the powder loading mechanism of the present invention. [Detailed Embodiments]

[0028] The following is a more detailed description in combination with the drawings and the embodiments of the present invention:

[0029] As Figure 1-3 shown, a cyclic powder spraying device includes a frame 1. A powder loading mechanism 2 for loading and collecting excess hot-melt powder, a cyclic conveying mechanism 3 through which the heat transfer substrate passes, at least one powder feeding mechanism 4 that moves along with the cyclic conveying mechanism 3 to transport the hot-melt powder in the powder loading mechanism 2 above the heat transfer substrate, and at least one blocking mechanism 5 arranged above the heat transfer substrate to tilt the powder feeding mechanism 4 to sprinkle the hot-melt powder on the heat transfer substrate.

[0030] The cyclic conveying mechanism 3 drives the powder feeding mechanism 4 to move. When the powder feeding mechanism 4 passes by the powder loading mechanism 2, it automatically loads the hot melt powder and transports it to above the heat transfer substrate along with the cyclic conveying mechanism 3. When the powder feeding mechanism 4 passes by the blocking mechanism 5, it tilts to sprinkle the hot melt powder on the heat transfer substrate. At the same time, the excess hot melt powder on the heat transfer substrate will fall back into the powder loading mechanism 2 below, realizing the automatic cyclic powder sprinkling function to ensure that there is enough hot melt powder in the powder loading mechanism 2 and avoid the situation of lack of powder during powder sprinkling, without the need for manual attendance to add hot melt powder.

[0031] As Figure 2-3 shown, the cyclic conveying mechanism 3 includes multiple sets of runner groups 31 arranged on the frame 1. There are two conveyor belts 32 arranged side by side on the runner groups 31 and through which the heat transfer substrate passes. One set of runner groups 31 is connected with a first transmission rod 33. The other end of the first transmission rod 33 is provided with a first transmission wheel 36. On the frame 1, there is a conveying mechanism motor assembly 35 whose rotating end is connected with the first transmission wheel 36 through a belt to achieve synchronous rotation. The runner group 31 is composed of two runners. There are four sets of runner groups 31 and they are arranged at the four corners of the frame 1. The two conveyor belts 32 are arranged around the heat transfer substrate on the four sets of runner groups 31. When the conveying mechanism motor assembly 35 rotates, it drives the first transmission wheel 36 to rotate through the belt. The first transmission wheel 36 drives one set of runner groups 31 to rotate, thereby driving the conveyor belt 32 to rotate cyclically.

[0032] As Figure 2-3 and Figure 5 shown, the powder feeding mechanism 4 includes a fixing rod 41 fixedly connected between the two conveyor belts 32. There is a rotating rod 42 on the fixing rod 41 whose upper end can rotate around the fixing rod 41. The lower end of the rotating rod 42 is connected with a hanging basket 43 that tilts to load powder when moving on the powder loading mechanism 2. In this case, the conveyor belt 32 rotates clockwise. The conveyor belt 32 drives the fixing rod 41 to move. Under the action of gravity, the hanging basket 43 is in an upright state. When the fixing rod 41 moves from the falling section of the conveyor belt 32 to the lower horizontal moving section, the hanging basket 43 contacts the hot melt powder in the powder loading mechanism 2. At this time, the hanging basket 43 tilts to the left. When the fixing rod 41 moves on the lower horizontal moving section of the conveyor belt 32, the hanging basket 43 keeps tilting to the left and moves to load the hot melt powder. When the fixing rod 41 moves from the lower horizontal moving section of the conveyor belt 32 to the rising section, the hanging basket 43 resumes the upright state and transports the loaded hot melt powder upward. When the fixing rod 41 moves on the upper horizontal moving section of the conveyor belt 32, when passing through the blocking mechanism 5, the hanging basket 43 is blocked and tilts to sprinkle the hot melt powder onto the heat transfer substrate. By tilting the hanging basket 43 to load and sprinkle the hot melt powder, the morphological change of the hot melt powder under the action of external force can be prevented.

[0033] As Figure 5As shown, the hanging basket 43 is a funnel-shaped hanging basket. The lower end of the funnel-shaped hanging basket is biased to the right, ensuring that when the fixing rod 41 moves from the falling section of the conveyor belt 32 to the lower horizontal moving section, the hanging basket 43 contacts the hot-melt powder in the powder loading mechanism 2 and tilts to the left, so that the hanging basket 43 loads the hot-melt powder when moving in the lower horizontal moving section; the funnel-shaped hanging basket is a funnel-shaped hanging basket in the shape of a right triangle, and the left side of the funnel-shaped hanging basket in the shape of a right triangle is an inclined plane, ensuring that the hanging basket 43 tilts to the left after falling and is more convenient for loading the hot-melt powder.

[0034] As Figure 5 shown, the fixing rod 41 is composed of an upper clamping block 411 and a lower clamping block 412. The two ends of the upper clamping block 411 and the lower clamping block 412 respectively clamp the two sides of the conveyor belt 32. An upper auxiliary block 413 is arranged on one side of the upper clamping block 411 and extends upward, and a lower auxiliary block 414 is arranged on one side of the lower clamping block 412 and extends downward. The rotating rod 42 is sleeved on the upper clamping block 411, the lower clamping block 412, the upper auxiliary block 413 and the lower auxiliary block 414 and rotates around them; anti-slip pads 415 are arranged at the contact positions between the upper clamping block 411, the lower clamping block 412 and the conveyor belt 32, so that the upper clamping block 411 and the lower clamping block 412 are firmly fixed on the conveyor belt 32; a limiting notch 44 for limiting the position of the rotating rod 42 is arranged on the fixing rod 41, and the limiting notches 44 are respectively arranged on the upper clamping block 411, the lower clamping block 412, the upper auxiliary block 413 and the lower auxiliary block 414. The position of the rotating rod 42 is limited through the limiting notch 44, preventing the rotating rod 42 from moving on the fixing rod 41 and touching external components such as the runner group 31 and deflecting, so that when the hanging basket 43 contacts the hot-melt powder in the powder loading mechanism 2, it cannot tilt to the left to load the hot-melt powder.

[0035] As Figure 1 and Figure 4 shown, a powder shaking mechanism 6 for shaking the heat transfer substrate to make the hot-melt powder on the heat transfer substrate move to both sides is arranged on the frame 1. The hot-melt powder is evenly laid on the heat transfer substrate, ensuring that the heat transfer substrate fully adheres to the hot-melt powder.

[0036] As Figure 4 shown, the powder shaking mechanism 6 includes a second transmission rod 61 arranged on the frame 1 and on one side of the heat transfer substrate. A shaking block 62 for shaking the heat transfer substrate while rotating with the second transmission rod 61 is arranged on the second transmission rod 61. A second transmission wheel 63 is arranged at one end of the second transmission rod 61. A powder shaking mechanism motor 64 with a rotating end drivingly connected to the second transmission wheel 63 through a belt is arranged on the frame 1. When the powder shaking mechanism motor 64 rotates, it drives the second transmission wheel 63 to rotate through the belt, so that the second transmission rod 61 rotates, and the shaking block 62 shakes the heat transfer substrate while rotating with the second transmission rod 61. Among them, there is at least one shaking block 62, and multiple shaking blocks 62 can be arranged on the same side of the second transmission rod 61 or on different sides of the second transmission rod 61.

[0037] AsFigure 2-3 and Figure 6-7 As shown in Figure 6-7 , the powder loading mechanism 2 includes a guide rail 21 provided on the frame 1 and a drawer 22 that can slide on the guide rail 21 and can be pulled out from the side of the frame 1. The drawer 22 is a V-shaped drawer, which is convenient for the hot melt powder to gather in the middle and convenient for the hanging basket 43 to load. When loading the powder, the drawer 22 can be pulled out from the side of the frame 1.

[0038] As Figure 6-7 shown in Figure 6-7 , the drawer 22 of the powder loading mechanism 2 in this case includes a left drawer and a right drawer, which can reduce the length of the drawer, thereby reducing the space requirement during powder addition; after closing, a part of the left drawer is sleeved into the right drawer, and when closing, the two sides squeeze the hot melt powder to make the hot melt powder more concentrated; as Figure 7 shown in Figure 7 , a plurality of inwardly inclined inner guide blocks 23 are provided at the insertion end of the left drawer, and a plurality of outwardly inclined outer guide blocks 24 are provided at the insertion end of the right drawer, which is convenient for the left drawer to be sleeved into the right drawer when closing.

[0039] As Figure 3 shown in Figure 3 , a blocking mechanism 5 is provided at the lower end of the ascending section of the circulating conveying mechanism 3 on the frame 1 for tilting the powder feeding mechanism 4 to reduce the loading amount of the hot melt powder, preventing the hanging basket 43 of the powder feeding mechanism 4 from dropping too much hot melt powder onto the lower runner group 31 when moving upward, which affects the smooth rotation of the rotating group 31.

[0040] As Figure 1-2 shown in Figure 1-2 , covers 7 for protecting the conveyor belt 32 are respectively provided above the upper horizontal conveying section and the lower horizontal conveying section of the circulating conveying mechanism 3 on the frame 1. The cover 7 above the upper horizontal conveying section of the circulating conveying mechanism 3 is not shown in the figure. The cover 7 above the lower horizontal conveying section of the circulating conveying mechanism 3 can prevent the thermal transfer substrate from sagging too much and touching the conveyor belt 32 to block its rotation. At the same time, guide slopes are provided on both sides of the cover 7 to facilitate guiding the hot melt powder shaken off from the thermal transfer substrate back into the lower powder loading drawer.

[0041] As Figure 1-3 shown in Figure 1-3 , the blocking mechanism 5 provided above the thermal transfer substrate is provided on the cover 7 above the upper horizontal conveying section of the circulating conveying mechanism 3. There are two blocking mechanisms 5 provided above the thermal transfer substrate and their blocking heights are different; the blocking mechanism 5 is a stop block. The different blocking heights of the blocking mechanism 5 provided above the thermal transfer substrate can make the loaded hot melt powder fall onto the thermal transfer substrate separately at multiple points, realizing the rapid and uniform adhesion of the hot melt powder on the thermal transfer substrate.

Claims

1. A cyclic powder spraying device, characterized in that: It includes a machine frame (1). On the machine frame (1), there are a powder loading mechanism (2) for loading and collecting excess hot melt powder, a circulating conveying mechanism (3) through which the heat transfer substrate passes, at least one powder feeding mechanism (4) that moves with the circulating conveying mechanism (3) to transport the hot melt powder in the powder loading mechanism (2) above the heat transfer substrate, and at least one blocking mechanism (5) arranged above the heat transfer substrate to tilt the powder feeding mechanism (4) and sprinkle the hot melt powder on the heat transfer substrate. On the machine frame (1), there is a powder shaking mechanism (6) for shaking the heat transfer substrate to make the hot melt powder on the heat transfer substrate move to both sides. The powder shaking mechanism (6) includes a second transmission rod (61) arranged on the machine frame (1) and on one side of the heat transfer substrate. On the second transmission rod (61), there is a shaking block (62) that rotates with the second transmission rod (61) to shake the heat transfer substrate. One end of the second transmission rod (61) is provided with a second transmission wheel (63). On the machine frame (1), there is a powder shaking mechanism motor (64) whose rotating end is connected to the second transmission wheel (63) through a belt for transmission connection. On the machine frame (1), above the upper horizontal conveying section and the lower horizontal conveying section of the circulating conveying mechanism (3), there are cover plates (7) respectively. The blocking mechanism (5) arranged above the heat transfer substrate is arranged on the cover plate (7) above the upper horizontal conveying section of the circulating conveying mechanism (3). There are two blocking mechanisms (5) arranged above the heat transfer substrate and their blocking heights are different.

2. The circulating powder spraying device according to claim 1, characterized in that: The circulating conveying mechanism (3) includes multiple sets of runner groups (31) arranged on the machine frame (1). On the runner groups (31), there are two conveyor belts (32) arranged side by side through which the heat transfer substrate passes. One of the sets of runner groups (31) is connected to a first transmission rod (33). The other end of the first transmission rod (33) is provided with a first transmission wheel (36). On the machine frame (1), there is a conveying mechanism motor assembly (35) whose rotating end is connected to the first transmission wheel (36) through a belt to achieve synchronous rotation.

3. The circulating powder sprinkling device according to claim 2, characterized in that: The powder feeding mechanism (4) includes a fixed rod (41) fixedly connected between the two conveyor belts (32). On the fixed rod (41), there is a rotating rod (42) whose upper end can rotate around the fixed rod (41). The lower end of the rotating rod (42) is connected with a hanging basket (43) that tilts to load powder when moving on the powder loading mechanism (2).

4. A cyclic powder sprinkling device according to claim 3, characterized in that: On the fixed rod (41), there is a limit notch (44) for limiting the position of the rotating rod (42). The hanging basket (43) is a funnel-shaped hanging basket, and the lower end of the funnel-shaped hanging basket deviates to the right.

5. A cyclic powder spraying device according to claim 1, characterized in that: The powder loading mechanism (2) includes a guide rail (21) arranged on the machine frame (1) and a drawer (22) that can slide on the guide rail (21) and can be pulled out from the side of the machine frame (1).

6. The circulating powder spraying device according to claim 1, characterized in that: On the machine frame (1), at the lower end of the ascending section of the circulating conveying mechanism (3), there is a blocking mechanism (5) for tilting the powder feeding mechanism (4) to reduce the loading amount of the hot melt powder.

7. A cyclic powder spraying device according to claim 1 or 6, characterized in that: The blocking mechanism (5) is a stop block.

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