Plastic part preheating device

Abstract

The utility model belongs to the technical field of plastic part production, and particularly relates to a plastic part preheating device which comprises a preheating box, a transmission mechanism and a preheating assembly, a feeding port is formed in the preheating box, and a box door is arranged on the feeding port; the transmission mechanism is arranged at the top of the preheating box and comprises at least two first chain wheels and a transmission chain matched with the first chain wheels, the first chain wheels are rotationally installed at the top of the preheating box, any first chain wheel is driven by a motor, and a plurality of second chain wheels arranged in the preheating box are arranged on the outer side of the transmission chain in a matched mode. A clamping assembly is coaxially arranged on the second chain wheel; the preheating assembly comprises a heat dissipation barrel installed at the bottom of the preheating box, the top of the heat dissipation barrel is close to the bottom of the clamping assembly, a plurality of heat dissipation holes are formed in the heat dissipation barrel, and the heat dissipation barrel is connected with an external heating fan through a pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of plastic parts manufacturing technology, specifically relating to a preheating device for plastic parts. Background Technology

[0002] Preheating is a routine step before painting automotive plastic parts. Preheating automotive plastic parts before painting can significantly improve the adhesion and leveling of the coating, while promoting the rapid evaporation of solvents, avoiding condensation problems, ensuring that the coating is uniform and dries quickly, thereby obtaining a high-quality, beautiful and durable surface treatment effect. In addition, preheating also helps to reduce internal stress caused by temperature changes, prevent parts from deforming, and optimize the overall painting process.

[0003] Patent CN208392399U discloses a preheating device for producing plastic parts for automobiles. The device involves mounting plastic parts on fixed hanging rings and conveying them to the inner cavity of a preheating chamber via a conveyor belt. Preheating is then performed by a baking fan. However, in this design, the parts are suspended and baked by the baking nozzles directly below, resulting in the lower part of the parts receiving significantly more heat than the upper part. This is especially problematic for irregular plastic parts like automotive components, as it can lead to uneven heating and negatively impact the preheating effect. Utility Model Content

[0004] In view of the problems mentioned in the background art above, the present invention provides a preheating device for plastic parts.

[0005] The technical solution adopted by this utility model is as follows: A preheating device for plastic parts includes a preheating box, a transmission mechanism, and a preheating component. The preheating box has a feed inlet and a door. The transmission mechanism is located on the top of the preheating box and includes at least two first sprockets and a transmission chain that cooperates with the first sprockets. The first sprockets are rotatably mounted on the top of the preheating box, and any one of the first sprockets is driven by a motor. Several second sprockets are arranged inside the preheating box and cooperate with the outer side of the transmission chain. A clamping component is coaxially arranged on the second sprocket. The preheating component includes a heat dissipation cylinder installed at the bottom of the preheating box. The top of the heat dissipation cylinder is close to the bottom of the clamping component. Several heat dissipation holes are opened on the heat dissipation cylinder, and the heat dissipation cylinder is connected to an external heating fan pipe.

[0006] Furthermore, the clamping assembly includes a clamping post, which is coaxially fixed with the second sprocket, and a lifting ring is provided below the clamping post.

[0007] Furthermore, a sliding groove is provided on the top of the preheating box, the top of the clamping column passes through the second sprocket, and a dovetail block is provided on the top of the clamping column, the dovetail block matching the sliding groove.

[0008] Furthermore, a positioning block is provided between the dovetail block and the clamping column, and a positioning hole is provided on the positioning block. Several round holes are provided on the top side wall of the preheating box, and the round holes are connected to the positioning holes by connecting pins.

[0009] Furthermore, the positioning hole is oblong.

[0010] Furthermore, heat dissipation holes are provided on the top of both sides of the preheating box.

[0011] The beneficial effects of this utility model are:

[0012] 1. Through the design of the preheating chamber and its top transmission mechanism, the transmission mechanism works in conjunction with the clamping assembly. The first sprocket is driven by a motor, which rotates the transmission chain, causing the second sprocket to rotate at its current position. This ensures continuous and uniform movement of the plastic parts during preheating, guaranteeing that each part receives consistent heat distribution. Secondly, the design of the heat sink, combined with its position near the clamping assembly and its connection to an external heating fan, ensures that heat supplied from below is efficiently and evenly transferred to the plastic parts, avoiding the problem of excessive heating at the bottom in traditional preheating methods. This is particularly suitable for irregularly shaped automotive plastic parts. This innovative design not only improves coating adhesion and leveling, promotes solvent evaporation, and ensures high-quality surface treatment, but also reduces internal stress caused by temperature changes, preventing part deformation. This optimizes subsequent painting processes and improves production efficiency and product quality.

[0013] 2. The sliding groove at the top of the preheating chamber matches the dovetail block at the top of the clamping column, allowing the clamping assembly to move smoothly along a predetermined path. This enables the accurate positioning and fixing of plastic parts of different sizes and shapes, while ensuring the consistency and reliability of preheating, further improving preheating efficiency and quality. Attached Figure Description

[0014] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the clamping assembly of this utility model;

[0017] Figure 3 This is a cross-sectional view of the top of the preheating box of this utility model;

[0018] Figure 4 This is a bottom view schematic diagram of the preheating box of this utility model;

[0019] The attached diagram is labeled as follows:

[0020] Preheating box 1, feed inlet 11, motor 12, heat dissipation cylinder 13, heat dissipation hole 14, sliding groove 15, round hole 16, heat dissipation hole 17, first sprocket 2, transmission chain 21, second sprocket 22, clamping column 3, lifting ring 31, dovetail block 32, positioning block 33, positioning hole 34, connecting pin 35. Detailed Implementation

[0021] like Figures 1-4 As shown, a preheating device for plastic parts includes a preheating box 1, a transmission mechanism, and a preheating assembly. The preheating box 1 has a feed inlet 11 with a door. The transmission mechanism is located on the top of the preheating box 1 and includes at least two first sprockets 2 and a transmission chain 21 that cooperates with the first sprockets 2. The first sprockets 2 are rotatably mounted on the top of the preheating box 1, and any one of the first sprockets 2 is driven by a motor 12. Several second sprockets 22 are arranged inside the preheating box 1 and are fitted to the outside of the transmission chain 21. Clamping assemblies are coaxially arranged on the second sprockets 22. The preheating assembly includes a heat dissipation cylinder 13 installed at the bottom of the preheating box 1. The top of the heat dissipation cylinder 13 is close to the bottom of the clamping assembly. Several heat dissipation holes 14 are opened on the heat dissipation cylinder 13, and the heat dissipation cylinder 13 is connected to an external heating fan pipeline.

[0022] By adopting the above technical solution, through the setting of the preheating box 1 and its top transmission mechanism, the transmission mechanism cooperates with the clamping assembly. The first sprocket 2 is driven by the motor 12 to realize the rotation of the transmission chain 21, which in turn drives the second sprocket 22 to rotate at its current position. This achieves continuous and uniform movement of the plastic parts during the preheating process, ensuring that each part receives a consistent heat distribution. Secondly, the design of the heat dissipation cylinder 13, combined with its position near the clamping assembly at the bottom and its connection to the external heating fan, ensures that the heat provided from below can be efficiently and evenly transferred to the plastic parts, avoiding the problem of excessive heating at the bottom in traditional preheating methods. This is particularly suitable for irregularly shaped automotive plastic parts. This innovative design not only improves coating adhesion and leveling, promotes solvent evaporation, and ensures high-quality surface treatment results, but also reduces internal stress caused by temperature changes, prevents part deformation, thereby optimizing the overall spraying process and improving production efficiency and product quality.

[0023] As a preferred embodiment, the clamping assembly includes a clamping post 3, which is coaxially fixed to the second sprocket 22, and a lifting ring 31 is provided below the clamping post 3. The component to be preheated is connected through the lifting ring 31, and the component to be preheated can be clamped by hooks, clamps, etc. and then hung on the lifting ring 31; the clamping post 3 is coaxially fixed to the second sprocket 22 to ensure that the component to be preheated rotates and is heated evenly.

[0024] As a preferred embodiment, the preheating chamber 1 has a sliding groove 15 at its top, the clamping column 3 has a second sprocket 22 passing through its top, and a dovetail block 32 is provided at the top of the clamping column 3, which matches the sliding groove 15. The matching of the sliding groove 15 at the top of the preheating chamber 1 with the dovetail block 32 at the top of the clamping column 3 allows the clamping assembly to move smoothly along a predetermined path. This enables the accurate positioning and fixing of plastic parts of different sizes and shapes, while ensuring the consistency and reliability of preheating, further improving preheating efficiency and quality.

[0025] As a preferred embodiment, a positioning block 33 is provided between the dovetail block 32 and the clamping column 3, and a positioning hole 34 is provided on the positioning block 33. A plurality of round holes 16 are provided on the top side wall of the preheating box 1, and the round holes 16 and the positioning holes 34 are connected by a connecting pin 35.

[0026] As a preferred embodiment, the positioning hole 34 is oblong. The positioning block 33 has an oblong positioning hole 34, which is connected to the round hole 16 on the top side wall of the preheating box 1 via a connecting pin 35. This design greatly facilitates the position adjustment and fixation of the clamping assembly. The use of the oblong positioning hole 34 makes alignment easier and more adaptable.

[0027] As a preferred embodiment, heat dissipation holes 14 are provided on the top of both sides of the preheating box 1. Adding heat dissipation holes 14 to the top of both sides of the preheating box 1 can effectively dissipate excess heat and prevent the temperature inside the preheating box 1 from being too high, which would affect the preheating effect.

[0028] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A plastic part preheating apparatus characterized by: The utility model provides a preheating box and preheating device thereof, which belongs to the technical field of preheating device. Preheat the box (1), the preheat the box (1) on the opening has the feed inlet (11), be provided with the box door on the feed inlet (11); Transmission mechanism, the transmission mechanism sets up at preheat the box (1) top, the transmission mechanism includes at least two first sprocket (2) and with first sprocket (2) cooperation transmission chain (21), first sprocket (2) rotation is installed at preheat the box (1) top, any first sprocket (2) is driven through motor (12), transmission chain (21) outside cooperation has a plurality of second sprocket (22) that sets up in preheat the box (1), the coaxial setting has clamping assembly on second sprocket (22); Preheating assembly, the preheating assembly includes the heat dissipation cylinder (13) that installs at preheat the box (1) bottom, the heat dissipation cylinder (13) top is close to the clamping assembly bottom, and the heat dissipation cylinder (13) is connected with the heating fan pipeline of outside.

2. A plastic part preheating device as defined in claim 1, wherein: The clamping assembly includes a clamping column (3), the clamping column (3) is coaxially fixed with the second sprocket (22), and a lifting ring (31) is arranged below the clamping column (3).

3. A plastic part preheating device as defined in claim 2, wherein: The top of the preheating box (1) is provided with a sliding groove (15), the top of the clamping column (3) penetrates the second sprocket (22), and the top of the clamping column (3) is provided with a dovetail block (32), the dovetail block (32) is matched with the sliding groove (15).

4. A plastic part preheating device as defined in claim 3, wherein: The dovetail block (32) and the clamping column (3) are provided with a positioning block (33), the positioning block (33) is provided with a positioning hole (34), and the top of the preheating box (1) is provided with a plurality of circular holes (16), the circular holes (16) and the positioning hole (34) are connected through a connecting pin (35).

5. A plastic part preheating device as defined in claim 4, wherein: The positioning hole (34) is a waist-shaped hole.

6. A plastic part preheating device as defined in claim 1, wherein: The top of the preheating box (1) is provided with a plurality of heat dissipation holes (14).

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