Feeding device of PVC sheet calender for cosmetic packaging

Abstract

The utility model relates to a feeding device of a PVC (polyvinyl chloride) sheet calender for cosmetic packaging, and aims to solve the problems that when extruded and formed PVC is conveyed at present, the surface layer is hardened and the core part is still melted due to too fast surface cooling, layering of cold skin and hot core occurs in subsequent calendering, the surface of the PVC is polluted during conveying due to dust in a working environment, and the production cost is reduced. The technical problem that flaws occur after calendering, and the PVC calendering quality is further affected is solved, the PVC calendering device comprises a conveyor, a protection mechanism and a heating and blowing mechanism are arranged on the conveyor, and the protection mechanism comprises an upper protection cover installed above the conveyor and a lower protection cover installed below the conveyor. The PVC material conveying device has the advantages that the situation that in the PVC material conveying process, due to the fact that the surface of a PVC material is cooled too fast, the surface layer is likely to be hardened, and the core portion is still molten is avoided, meanwhile, dust in the working environment is prevented from being adsorbed to the surface of the conveyed PVC material, the PVC surface is prevented from being polluted in the conveying process, flaws generated after calendaring are avoided, and the PVC calendaring quality is further improved.

Description

Technical Field

[0001] This utility model relates to the field of PVC sheet processing, specifically a feeding device for a PVC sheet calendering machine for cosmetic packaging. Background Technology

[0002] After cosmetics are produced, they need to be calendered into PVC sheets to package them, ensuring the aesthetics, safety, and durability of the packaged cosmetics.

[0003] After PVC is extruded, it is conveyed to a calender via a conveyor belt for calendering. Traditional conveyor belts lack any external protection, leading to rapid surface cooling during transport. This can cause the surface layer to harden while the core remains molten, resulting in "cold skin, hot core" delamination during subsequent calendering. Furthermore, dust in the working environment can contaminate the PVC surface during transport, causing defects (such as spots and streaks) after calendering, further affecting the quality of PVC calendering. Therefore, a new technical solution is needed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a feeding device for a PVC sheet calendering machine for cosmetic packaging. This device solves the technical problems that currently, when conveying PVC after extrusion molding, the surface cools too quickly, which may cause the surface layer to harden while the core remains molten, resulting in "cold skin and hot core" delamination during subsequent calendering. Furthermore, dust in the working environment may cause contamination of the PVC surface during conveying, leading to defects after calendering and further affecting the quality of PVC calendering.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: design a feeding device for a PVC sheet calendering machine for cosmetic packaging, including a conveyor, on which a protective mechanism and a heating blower mechanism are provided. The protective mechanism includes an upper protective cover installed above the conveyor and a lower protective cover installed below the conveyor. The lower protective cover is welded to the bottom of the conveyor.

[0006] The heating blower mechanism includes a hot air blower installed on the top of the upper protective cover and ducts installed on both sides of the inner cavity of the upper protective cover. The air outlet of the hot air blower is connected to a connecting pipe. The connecting pipe is T-shaped. Both ends of the connecting pipe pass through the upper protective cover and are connected to two connecting pipes respectively. The opposite ends of the two connecting pipes are connected to multiple air outlets, and the multiple air outlets are inclined towards the conveyor belt on the conveyor.

[0007] Preferably, the lower protective cover has a through hole, and a scraper is installed between the two sides of the inner cavity of the through hole. The scraper is inclined and the top of the scraper moves against the conveyor belt on the conveyor.

[0008] Preferably, the upper sides of the upper protective cover are hinged with side plates via damping hinges, and the bottom sides of the lower protective cover are equipped with slide rails, both of which are inverted T-shaped, and a movable plate is slidably connected to the two slide rails.

[0009] Preferably, a filter frame is provided on the top of the upper protective cover, the filter frame is sleeved on the outside of the hot air blower, a fixing frame is welded to the lower outside of the filter frame, a first bolt passes through the fixing frame, and the first bolt is threaded to the surface of the upper protective cover.

[0010] Preferably, both ends of the upper protective cover are provided with fixing plates, both fixing plates are welded to the upper protective cover, and both fixing plates are penetrated by a second bolt, which is threaded to the surface of the conveyor.

[0011] Preferably, the end of the movable plate near the scraper is inclined, and the inclined surface of the movable plate is adapted to one end of the scraper.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model combines a hot air blower, connecting pipe, conduit, air outlet, upper protective cover, and lower protective cover to heat the PVC material extruded by the extruder on the conveyor. This prevents the PVC material from cooling too quickly during the conveying process, which could lead to surface hardening while the core remains molten, resulting in "cold skin, hot core" delamination during subsequent calendering. Simultaneously, it prevents dust from entering from both ends of the upper and lower protective covers and adsorbing onto the surface of the conveyed PVC material, thus avoiding surface contamination during conveying and preventing defects (such as spots or streaks) after calendering, further improving the quality of PVC calendering.

[0014] 2. By combining a scraper and a through hole, this utility model allows the scraper to clean the residual PVC material on the surface of the conveyor belt when the conveyor belt rotates and transports the PVC material. This prevents the residual PVC material from hardening and accelerating the mechanical wear of the conveyor belt and rollers, thus shortening the life of the conveyor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the conveyor and the lower protective cover of this utility model;

[0017] Figure 3This is a schematic diagram of the connection structure between the hot air blower and the connecting pipe and conduit of this utility model;

[0018] Figure 4 This is an enlarged view of section A of this utility model.

[0019] In the diagram: 1. Conveyor; 2. Upper protective cover; 21. Side plate; 22. Fixing plate; 23. Second bolt; 3. Filter frame; 31. Fixing frame; 32. First bolt; 4. Hot air blower; 41. Connecting pipe; 42. Conduit; 43. Air outlet; 5. Lower protective cover; 51. Through hole; 52. Scraper; 53. Moving plate; 54. Slide rail. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Example 1: A feeding device for a PVC sheet calendering machine for cosmetic packaging, see [link to example]. Figures 1 to 4 The system includes a conveyor 1, which is equipped with a protective mechanism and a heating blower mechanism. The protective mechanism includes an upper protective cover 2 installed above the conveyor 1 and a lower protective cover 5 installed below the conveyor 1. The lower protective cover 5 is welded to the bottom of the conveyor 1.

[0022] The heating blower mechanism includes a hot air blower 4 installed on the top of the upper protective cover 2 and ducts 42 installed on both sides of the inner cavity of the upper protective cover 2. The hot air blower 4 is a Quick 857DW model with a temperature range of 100~450°C and adjustable air volume. The air outlet of the hot air blower 4 is connected to a connecting pipe 41. The connecting pipe 41 is T-shaped. Both ends of the connecting pipe 41 pass through the upper protective cover 2 and are connected to two connecting pipes 41 respectively. The opposite ends of the two connecting pipes 41 are connected to multiple air outlets 43, and the multiple air outlets 43 are inclined towards the conveyor belt on the conveyor 1.

[0023] During operation, the PVC material extruded by the extruder is conveyed via conveyor 1. During this process, the hot air blower 4 is activated, spraying hot air through connecting pipe 41 and air outlet 43 to heat the PVC material being conveyed on conveyor 1. This prevents the PVC material from cooling too quickly during conveying, which could lead to surface hardening while the core remains molten, resulting in a "cold skin, hot core" delamination during subsequent calendering. Simultaneously, the continuous blowing of hot air into the upper protective cover 2 creates a positive pressure environment. This causes hot air to spray outwards from the openings at both ends of the upper protective cover 2, preventing dust from entering from the upper and lower protective covers 5 and adsorbing onto the surface of the conveyed PVC material. This avoids surface contamination during conveying, preventing defects (such as spots or streaks) after calendering and further improving the quality of PVC calendering.

[0024] For details, see Figure 1 and Figure 2 The lower protective cover 5 has a through hole 51. A scraper 52 is installed between the two sides of the inner cavity of the through hole 51. The scraper 52 is inclined and its top is in contact with the conveyor belt on the conveyor 1. When the conveyor belt on the conveyor 1 rotates to transport PVC material, the scraper 52 can clean the PVC material remaining on the surface of the conveyor belt on the conveyor 1, so as to avoid the residual PVC material from solidifying and accelerating the mechanical wear of the conveyor belt and rollers on the conveyor 1, thus shortening the service life of the conveyor 1.

[0025] Further, see Figure 1 — Figure 3 The upper protective cover 2 has side plates 21 hinged to both sides of its upper sides via damping hinges. The lower protective cover 5 has slide rails 54 installed on both sides of its bottom, and both slide rails 54 are inverted T-shaped. A movable plate 53 is slidably connected to the two slide rails 54. The end of the movable plate 53 near the scraper 52 is set with an inclined surface. The inclined surface of the movable plate 53 is adapted to one end of the scraper 52. When the conveyor 1 is not in use, the side plates 21 are rotated by the damping hinges to cover the two ends of the upper protective cover 2 and the lower protective cover 5. Then, the movable plate 53 is pushed by the slide rails 54 to cover the through hole 51. The inclined surface of the movable plate 53 improves the sealing of the connection between the movable plate 53 and the scraper 52. This prevents dust from the working environment from entering and adsorbing onto the conveyor belt of the conveyor 1 through the two ends of the upper protective cover 2, the two ends of the lower protective cover 5, and the through hole 51 when the conveyor 1 is not in use. This further prevents dust from adsorbing onto the PVC material to be conveyed next time, thus affecting the quality of the PVC material calendering next time.

[0026] It is worth noting that, see Figure 1The top of the upper protective cover 2 is provided with a filter frame 3, which is sleeved on the outside of the hot air blower 4. A fixing frame 31 is welded to the lower outside of the filter frame 3. A first bolt 32 passes through the fixing frame 31 and is threaded to the surface of the upper protective cover 2. The filter frame 3 facilitates the filtration of the air drawn in by the hot air blower 4, thereby preventing dust in the working environment from entering the upper protective cover 2 through the hot air blower 4, connecting pipe 41, duct 42 and air outlet 43. This further prevents dust from affecting the quality of PVC material calendering. Furthermore, the filter frame 3 can be easily disassembled and reassembled by turning the first bolt 32, which facilitates the maintenance of the hot air blower 4.

[0027] It is worth noting that, see Figure 1 The upper protective cover 2 is provided with fixing plates 22 at both ends. Both fixing plates 22 are welded to the upper protective cover 2. Both fixing plates 22 are provided with second bolts 23, and the second bolts 23 are threaded to the surface of the conveyor 1. The upper protective cover 2 can be disassembled and assembled by turning the second bolts 23, which facilitates the maintenance of the conveyor 1.

[0028] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0029] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A feeding device for a PVC sheet calendering machine for cosmetic packaging, comprising a conveyor (1), wherein the conveyor (1) is equipped with a protective mechanism and a heating blower mechanism, characterized in that, The protective mechanism includes an upper protective cover (2) installed above the conveyor (1) and a lower protective cover (5) installed below the conveyor (1), the lower protective cover (5) being welded to the bottom of the conveyor (1); The heating blower mechanism includes a hot air blower (4) installed on the top of the upper protective cover (2) and ducts (42) installed on both sides of the inner cavity of the upper protective cover (2). The air outlet of the hot air blower (4) is connected to a connecting pipe (41). The connecting pipe (41) is T-shaped. Both ends of the connecting pipe (41) pass through the upper protective cover (2) and are connected to two connecting pipes (41) respectively. The opposite ends of the two connecting pipes (41) are connected to multiple air outlets (43), and the multiple air outlets (43) are inclined towards the conveyor belt on the conveyor (1).

2. The feeding device for a PVC sheet calendering machine for cosmetic packaging as described in claim 1, characterized in that, The lower protective cover (5) has a through hole (51), and a scraper (52) is installed between the two sides of the inner cavity of the through hole (51). The scraper (52) is inclined and the top of the scraper (52) moves against the conveyor belt on the conveyor (1).

3. The feeding device for a PVC sheet calendering machine for cosmetic packaging as described in claim 1, characterized in that, The upper protective cover (2) has side plates (21) hinged to both sides by damping hinges. The lower protective cover (5) has slide rails (54) installed on both sides of the bottom. Both slide rails (54) are inverted T-shaped and sliding plates (53) are slidably connected to the two slide rails (54).

4. The feeding device for a PVC sheet calendering machine for cosmetic packaging as described in claim 1, characterized in that, The top of the upper protective cover (2) is provided with a filter frame (3), which is sleeved on the outside of the hot air blower (4). A fixing frame (31) is welded to the lower outside of the filter frame (3), and a first bolt (32) passes through the fixing frame (31), and the first bolt (32) is threadedly connected to the surface of the upper protective cover (2).

5. The feeding device for a PVC sheet calendering machine for cosmetic packaging as described in claim 1, characterized in that, The upper protective cover (2) is provided with fixing plates (22) at both ends. The two fixing plates (22) are welded to the upper protective cover (2). The two fixing plates (22) are each provided with a second bolt (23), and the second bolt (23) is threaded to the surface of the conveyor (1).

6. The feeding device for a PVC sheet calendering machine for cosmetic packaging as described in claim 3, characterized in that, The movable plate (53) is inclined at one end near the scraper (52), and the inclined surface of the movable plate (53) is adapted to one end of the scraper (52).

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