Sheet feeding device of plastic product thermal forming equipment

Abstract

The utility model relates to a sheet feeding device of plastic product thermal forming equipment, which comprises a chain track, a sheet feeding chain arranged on the chain track, a material pricking needle arranged on the sheet feeding chain, a material input end arranged at the front end of the chain track, a material output end arranged at the rear end of the chain track, and a heated part penetrating through a heating area arranged between the material input end and the material output end of the chain track. The heated part is provided with a waste receiving heat-proof bottom shell, the waste receiving heat-proof bottom shell is connected to the chain track and provided with a waste residue receiving containing cavity, an opening of the waste residue receiving containing cavity faces upwards, the periphery of the heated part is wrapped with the waste residue receiving containing cavity, and the inner side opening edge of the opening of the waste residue receiving containing cavity of the waste receiving heat-proof bottom shell is lower than the sheet feeding path. According to the sheet feeding device of the plastic product thermal forming equipment, the service life of the chain track and the like can be prolonged, replacement or maintenance of the chain track is reduced, the situation that the chain track is heated and deformed is further reduced in a matched mode, meanwhile, waste residues can be contained, and the risk that the waste residues fall into sheets or a heating device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the sheet feeding device of plastic product thermoforming equipment. BACKGROUND

[0002] The continuous plastic sheet is heated by the heating device and then conveyed to the forming mechanism for corresponding forming. For example, the sheet feeding device of CN214983126U plastic product thermoforming machine guide rail mechanism, CN204453600U pin tooth conveying chain rail device, CN212707970U plastic product thermoforming machine conveying chain rail mechanism and the like have the needle (i.e. material needle) on the chain for piercing into the sheet, and the needle runs with the chain on the chain rail to carry the pierced sheet forward. It is found that the particles on the sheet occasionally affect the quality of the molded plastic product, and the sparks in the heating device affect the service life of the heating device and the uniform heating of the sheet. In addition, the sheet is easily torn or broken during the use of the equipment, especially at the input end of the chain rail. SUMMARY

[0003] In view of the technical problems in the background art, the technical problem solved by the utility model is to provide a sheet feeding device of plastic product thermoforming equipment.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the sheet feeding device of plastic product thermoforming equipment includes a chain rail, a sheet conveying chain provided on the chain rail, and a material needle provided on the sheet conveying chain. The front end of the chain rail is a material input end, the rear end of the chain rail is a material output end, and the material input end and the material output end of the chain rail have a heated part passing through a heating area. The heated part is provided with a waste receiving and heat-proof bottom shell connected to the chain rail. The waste receiving and heat-proof bottom shell has a waste receiving cavity with an opening facing upward. The waste receiving cavity is wrapped around the periphery of the heated part, and the inner side of the opening of the waste receiving cavity of the waste receiving and heat-proof bottom shell is lower than the sheet feeding path.

[0005] Various optimizations or supplementary explanations can be made on the above technical solutions.

[0006] For example, the waste receiving and heat-proof bottom shell is a long strip-shaped U-shaped shell.

[0007] For example, the waste receiving and heat-proof bottom shell is made of stainless steel.

[0008] The waste receiving and heat-proof bottom shell is connected to the chain rail through fasteners on the outer side and / or bottom side.

[0009] The inner side of the opening of the waste receiving cavity of the waste receiving and heat-proof bottom shell can be provided with a material supporting edge.

[0010] In addition, the chain track is additionally provided with a material-feeding copper plate for preventing adhesion, which is arranged at the inner side of the chain track and at the material input end, and is connected before the waste-accepting heat-proof bottom shell, and the upper edge of the material-feeding copper plate for preventing adhesion is lower than the sheet material feeding path.

[0011] In addition, the waste-accepting heat-proof bottom shell is provided with an inner side shell wall at the inner side of the chain track, and a waste-accepting gap is left between the inner side shell wall and the chain track.

[0012] The sheet material feeding device of the plastic product thermoforming equipment can prolong the service life of the chain track, reduce replacement or maintenance of the chain track, further reduce the situation of heat deformation of the chain track, and also receive waste residues and reduce the risk of the waste residues falling into the sheet material or the heating device. BRIEF DESCRIPTION OF DRAWINGS

[0013] The related details and working principles of the embodiments of the present application will be described below in combination with the drawings.

[0014] Figure 1 The drawings show the structure of the present application.

[0015] Figure 2 The drawings show the structure of the present application. Figure 1 The drawings show the structure of the present application.

[0016] Figure 3 The drawings show the structure of the present application. Figure 1 The drawings show the structure of the present application.

[0017] Figure 4 The drawings show the structure of the present application. Figure 1 The drawings show the structure of the present application.

[0018] The drawings show the structure of the present application.

[0019] 1, chain track; 10, sheet material feeding chain; 11, material bundling needle;

[0020] 2, waste-accepting heat-proof bottom shell; 20, waste residue receiving cavity; 22, connecting hole; 23, material supporting edge; 24, waste-accepting gap;

[0021] 3, material-feeding copper plate for preventing adhesion. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application all belong to the protection scope of the present application.

[0023] Referring to the drawings, in the embodiment of the present embodiment, the sheet feeding device of the plastic product thermoforming equipment comprises a chain track 1 (usually comprising a left track and a right track), a sheet feeding chain 10 is arranged on the chain track 1, the sheet feeding chain 10 is arranged to pass through the corresponding chain track 1 and cooperate with the conveying of the sheet during operation, a material pin 11 is arranged on the sheet feeding chain 10, the material pin 11 is inserted into the (plastic) sheet so that the sheet feeding chain 10 carries the sheet for conveying, wherein the front end of the chain track 1 is a material input end, the rear end of the chain track 1 is a material output end, the material input end and the material output end of the chain track 1 have a heated part passing through a heating area, the sheet feeding chain 10 passes through the heating area (usually provided with corresponding heating devices, such as upper and lower heating boxes) during conveying of the sheet, the sheet feeding chain 10 conveys the sheet through the heating area, so that the sheet is heated, and subsequent plastic product (such as plastic cup) forming can be carried out.

[0024] The heated part of the chain track 1 is provided with a waste receiving and heat-proof bottom shell 2, the waste receiving and heat-proof bottom shell 2 is connected to the chain track 1, that is, the waste receiving and heat-proof bottom shell 2 is installed on the chain track 1, the structure is relatively compact and reasonable; the waste residue generated when the material pin 11 is inserted into the sheet is left on the material pin 11 (there is a risk of falling off) or directly falls off, which causes occasional particle points on the sheet to affect the quality of the formed plastic product, or causes sparks in the heating device to affect the service life of the heating device and affect the uniform heating of the sheet, and the waste receiving and heat-proof bottom shell 2 installed on the chain track 1 not only can prevent heat and reduce the deformation of the chain track 1, but also can reduce the problems of the chain track 1 being pulled and twisted due to deformation, prolong the service life and stability of the chain track 1, and reduce the replacement or maintenance of the chain track 1 by replacing the waste receiving and heat-proof bottom shell 2; in addition, the waste receiving and heat-proof bottom shell 2 can receive the waste residue, the waste residue receiving cavity 20 of the waste receiving and heat-proof bottom shell 2 is wrapped around the heated part of the chain track 1, the waste residue can fall into the waste residue receiving cavity 20, the waste residue is collected, the risk of the waste residue falling onto the sheet (the area for forming the plastic product) is reduced, and the risk of the waste residue falling into the heating device is reduced. It can solve the problems of occasional particle points on the sheet and sparks in the heating device. In addition, the inner side of the opening of the waste residue receiving cavity 20 of the waste receiving and heat-proof bottom shell 2 is lower than the sheet feeding path, so that the waste receiving and heat-proof bottom shell 2 does not interfere with normal feeding.

[0025] The sheet feeding device of the plastic product thermoforming equipment can prolong the service life of the chain track 1, reduce the replacement or maintenance of the chain track 1, further reduce the deformation of the chain track 1 by cooperating with the water cooling structure (such as the water cooling structure of the chain track 1), and also receive the waste residue and reduce the risk of the waste residue falling onto the sheet or the heating device.

[0026] The following optimizations or further descriptions can be made based on the above embodiments respectively.

[0027] For example, the waste-accepting heat-proof bottom shell 2 is a long-strip-shaped U-shaped shell, i.e., the waste-accepting heat-proof bottom shell 2 has an outer shell wall, a bottom shell wall and an inner shell wall, forming a three-side-wall structure of left side, bottom side and right side, facilitating processing, such as direct integrated bending or stamping forming processing.

[0028] In addition, the waste-accepting heat-proof bottom shell 2 can be made of stainless steel, which is convenient to obtain and has relatively good heat-proof effect, can better insulate heat and protect the chain track 1 (usually made of aluminum or aluminum alloy, etc.) inside.

[0029] The waste-accepting heat-proof bottom shell 2 is connected between the outer side and / or the bottom side and the chain track 1 by fasteners (such as screws, etc.), and a corresponding connecting hole 22 is provided for fastener connection, facilitating disassembly, replacement or maintenance and cleaning.

[0030] Even the inner side of the opening of the waste-accepting heat-proof bottom shell 2 is designed as a material supporting edge 23, which can support and support the sheet material.

[0031] In addition, the chain track 1 is also provided with a material-following anti-sticking copper plate 3, which is arranged on the inner side of the chain track 1 and located at the material input end, and the material-following anti-sticking copper plate 3 is connected before the waste-accepting heat-proof bottom shell 2. The material-following anti-sticking copper plate 3 is made of copper, which has a relatively low coefficient of friction, facilitating the smooth input of the sheet material on the chain track 1 by the material-piercing needle 11 on the chain, and preventing the sheet material from being stuck and torn or broken during input.

[0032] The waste-accepting heat-proof bottom shell 2 has an inner shell wall on the inner side of the chain track 1, and a waste-accepting gap 24 is left between the inner shell wall and the chain track 1, which can be used for waste residue to fall into the receiving gap, and the waste residue is not easy to leave the waste-accepting heat-proof bottom shell 2, and the heating effective area is not easy to be affected.

Claims

1. A sheet feeding device for a thermoforming equipment for plastic products, comprising a chain track (1), a sheet feeding chain (10) on the chain track (1), a sheet feeding pin (11) on the sheet feeding chain (10), a material input end at the front end of the chain track (1), a material output end at the rear end of the chain track (1), and a heated portion passing through a heating zone between the material input end and the material output end of the chain track (1), characterized in that: The heated part is provided with a waste receiving and heat insulation bottom shell (2) connected to the chain track (1), The waste receiving and heat insulation bottom shell (2) has a waste receiving cavity (20) with an opening facing upwards, which covers the periphery of the heated part, The inner side of the opening of the waste receiving cavity (20) of the waste receiving and heat insulation bottom shell (2) is lower than the sheet feeding path.

2. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1, characterized in that: The waste receiving and heat insulation bottom shell (2) is a long strip-shaped U-shaped shell.

3. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1, characterized in that: The waste receiving and heat insulation bottom shell (2) is made of stainless steel.

4. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1, characterized in that: The waste receiving and heat insulation bottom shell (2) is connected to the chain track (1) through fasteners on the outer side and / or the bottom side.

5. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1, characterized in that: The inner side of the opening of the waste receiving cavity (20) of the waste receiving and heat insulation bottom shell (2) is provided with a material supporting edge (23).

6. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1, characterized in that: The chain track (1) is also provided with a material guiding and anti-sticking copper plate (3) arranged on the inner side of the chain track (1) at the material input end, which is connected before the waste receiving and heat insulation bottom shell (2) and has an upper edge lower than the sheet feeding path.

7. The sheet feeding apparatus for a thermoforming machine of plastic products according to claim 1 or 2, characterized in that: The waste receiving and heat insulation bottom shell (2) has an inner side shell wall on the inner side of the chain track (1), and a waste receiving gap (24) is left between the inner side shell wall and the chain track (1).

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