A mold and production process for producing double-sealed refrigerator EPS packaging liner

Abstract

The present invention discloses a mold and production process for producing EPS packaging linings for double-sealed refrigerators, including a shifting mold and a fixed mold, wherein the sides of the fixed mold are provided with a bottom plate corresponding to the inner side surface of the bottom of the shifting mold, the top of the bottom plate is provided with a bottom mold, a packaging lining is provided between the shifting mold and the bottom mold, the top surface of the shifting mold is provided with a cover plate, the surface of the cover plate is provided with a plurality of cylinders, a plurality of material guns are provided on the outside of the cylinders, and the bottom ends of the material guns penetrate the cover plate, and the top surface of the cover plate is also provided with a plurality of ejectors, and the ejectors penetrate the cover plate. The present invention realizes local independent spaces inside the shifting mold and the fixed mold by rectifying the mold, injects different EPS raw materials into the independent space through the material gun, and seamlessly integrates different EPS raw materials in the mode of cross-cutting steam heating and double-sided steam heating, thereby solving the performance and cost problems of the product and meeting customer needs.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging equipment, and in particular relates to a mold and a production process for producing a double-sealed refrigerator EPS packaging liner. Background Art

[0002] Product packaging refers to the general term for the decoration of products by using containers, materials and auxiliary materials in accordance with certain technical methods in the process of product transportation, storage and sales in order to protect the products, facilitate storage and promote sales. Product packaging is not only conducive to ensuring the safety and quality of special products, but also can well protect the legitimate rights and interests of warehousers, transporters, sellers and consumers of products.

[0003] At present, many packaging products often have insufficient cushioning performance at the contact points with home appliances during use.

[0004] At present, the solutions are as follows: 1. Increasing the overall performance of raw materials will increase the cost of packaging. 2. Locally installing paper corner protectors or reinforcing inserts will increase labor costs and material costs.

[0005] Therefore, it is necessary to invent a double-sealed refrigerator EPS packaging liner production mold and production process to solve the above problems. Summary of the invention

[0006] In view of the above problems, the present invention provides a mold and a production process for producing a double-sealed refrigerator EPS packaging liner to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mold for producing EPS packaging liners for double-sealed refrigerators, comprising a moving mold and a fixed mold, wherein the sides of the fixed mold are provided with a bottom plate corresponding to the inner side surface of the bottom of the moving mold, the top of the bottom plate is provided with a bottom mold, a packaging liner is provided between the moving mold and the bottom mold, the top surface of the moving mold is provided with a cover plate, the surface of the cover plate is provided with a plurality of cylinders, the number of the cylinders is set to four, the four cylinders are respectively located at the corners around the top of the cover plate, the cylinders penetrate the cover plate, and the cylinder output end is located on the inner side of the moving mold, a plurality of material guns are provided on the outside of the cylinders, and the bottom ends of the material guns penetrate the cover plate, and a plurality of ejectors are also provided on the top surface of the cover plate, and the ejectors penetrate the cover plate.

[0008] Furthermore, a stopper is provided at the output end of the cylinder, and four stoppers are respectively located at four corners of the transfer mold, and the bottom ends of the four stoppers are respectively fitted with the corners of the top surface of the packaging liner.

[0009] Furthermore, the overall shape of the stopper is set as an L-shaped bent plate, the bent portion of the stopper is provided with a plate, the output end of the cylinder is fixedly connected to the plate of the bent portion of the stopper, and the plate and the stopper are set as one body;

[0010] The ends of the stopper are respectively arranged corresponding to the adjacent side walls inside the transfer mold, and the stopper is located between the cover plate and the packaging liner.

[0011] Furthermore, a double top convex block is provided at the center of the top surface of the bottom mold, and a double hole groove is provided at the center of the packaging liner, and the double top convex block and the double hole groove are correspondingly buckled;

[0012] Furthermore, a limit plate is provided at the inner center of the double-hole groove, and the limit plate corresponds to the center of the double top protrusion, the top surface of the limit plate is flush with the top surface of the packaging liner, the top of the double top protrusion passes through the double-hole groove, and the height of the double top protrusion is greater than the thickness of the packaging liner.

[0013] Furthermore, both sides of the bottom of the packaging substrate are provided with clamping strips, and both sides of the top surface of the bottom mold are provided with clamping grooves corresponding to the clamping strips, and the bottom mold and the packaging liner have the same width and length.

[0014] Furthermore, the packaging liner surface is provided with corresponding holes, the corresponding holes are located on one side of the stopper, and the corresponding holes are located on one side of the double-hole groove, and the top surface of the bottom mold is provided with corresponding blocks corresponding to the corresponding holes, and the corresponding blocks are located on one side of the double top protrusions.

[0015] The present invention also provides a production process for producing a double-sealed refrigerator EPS packaging liner, the production process using the double-sealed refrigerator EPS packaging liner production mold as described above, comprising the following steps:

[0016] Assemble the transfer mold and the fixed mold, process the EPS raw material, and then pass the processed EPS raw material between the transfer mold and the fixed mold through the material gun;

[0017] Steam heating is performed on the transfer mold and the fixed mold surface to fuse the EPS raw materials;

[0018] The sintered EPS raw material is shaped by water cooling and vacuum stabilization;

[0019] With the cooperation of the cylinder and the ejector pin, the shaped EPS material is demoulded to form a packaging lining.

[0020] Furthermore, before steam heating the transfer mold and the fixed mold surface, the EPS raw material needs to be tested, and the specific testing steps include:

[0021] Determine whether the density and model of raw materials meet the actual values ​​of the set parameters;

[0022] If it does not meet the requirements, clean up the remaining EPS raw materials, and then add the EPS raw materials that meet the actual values ​​of the set parameters to the input end of the material gun;

[0023] If applicable, steam heating is applied to the transfer and solid mold surfaces.

[0024] Technical effects and advantages of the present invention:

[0025] 1. The present invention realizes local independent space inside the transfer mold and the fixed mold by modifying the mold, injects different EPS raw materials into the independent space through a material gun, and seamlessly integrates different EPS raw materials under the mode of cross-cutting steam heating and double-sided steam heating, thereby solving the performance and cost problems of the product and meeting customer needs.

[0026] 2. The present invention uses cylinders distributed at the four corners of the cover plate to connect with the four corners of the top surface of the packaging liner through four blocks. The four cylinders work simultaneously, which can keep the packaging liner in a horizontal state inside the transfer mold and avoid the packaging liner from tilting.

[0027] 3. When the packaging liner is pushed out from the inside of the transfer mold by the ejector pin, the stopper of the L-shaped structure can quickly separate from the top surface of the packaging liner, so that the packaging liner can be quickly separated from the transfer mold and the stopper, thereby ensuring the rapid production effect of the packaging liner. The L-shaped structure enhances the strength of the stopper while reducing the contact area between the stopper and the packaging liner.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the overall three-dimensional structure of a mold for producing a double-sealed refrigerator EPS packaging liner according to an embodiment of the present invention is shown;

[0031] Figure 2 A schematic diagram of a combined three-dimensional structure of a transfer mold and a packaging liner according to an embodiment of the present invention is shown;

[0032] Figure 3 A schematic diagram of the three-dimensional structure of the block and the packaging liner combination according to an embodiment of the present invention is shown;

[0033] Figure 4 A schematic diagram of the three-dimensional structure of a packaging liner according to an embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of a production process flow for producing a double-sealed refrigerator EPS packaging liner according to an embodiment of the present invention is shown;

[0035] In the figure: 1. transfer mold; 2. fixed mold; 3. bottom plate; 4. bottom mold; 5. packaging lining; 6. cover plate; 7. cylinder; 8. material gun; 9. ejector pin; 10. stopper; 11. double top protrusion; 12. double hole groove; 13. limit plate; 14. clamping strip; 15. clamping slot; 16. corresponding hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The present invention provides a mold for producing a double-sealed refrigerator EPS packaging liner, such as Figure 1 As shown, it includes a transfer mold 1 and a solid mold 2, and the solid mold 2 is provided with a bottom plate 3 that fits with the inner side of the bottom of the transfer mold 1. The transfer mold 1 is placed on the top of the solid mold 2, and the sides of the transfer mold 1 are flush with the sides of the solid mold 2, and the outer side of the bottom plate 3 on the inner side of the transfer mold 1 fits with the outer side of the bottom plate 3. Through the cooperation between the transfer mold 1 and the bottom plate 3, the transfer mold 1 and the solid mold 2 are in a sealed state, which prevents the EPS raw material from flowing out of the gap between the transfer mold 1 and the solid mold 2, and facilitates the packaging liner 5 to be shaped and cured inside the transfer mold 1.

[0038] A bottom mold 4 is provided on the top of the bottom plate 3. The bottom mold 4 is installed at the center of the top of the bottom plate 3. The bottom surface of the packaging liner 5 can be shaped through the bottom mold 4, so that the bottom surface of the packaging liner 5 matches the bottom of the home appliance, ensuring the cushioning effect of the home appliance on the surface of the packaging liner 5. A packaging liner 5 is provided between the transfer mold 1 and the bottom mold 4. A cover plate 6 is provided on the top surface of the transfer mold 1. A plurality of cylinders 7 are provided on the surface of the cover plate 6. A plurality of material guns 8 are provided on the outside of the cylinder 7, and the bottom ends of the material guns 8 penetrate the cover plate 6. The number of material guns 8 is set to nine, and the material guns 8 are installed on the top surface of the cover plate 6 in a 3×3 arrangement order. When adding EPS raw materials to the inside of the transfer mold 1 through the material guns 8, different raw materials can be added to different parts of the top of the bottom mold 4 according to the different raw materials required for each part of the packaging liner 5. Raw materials of different densities can be sintered together, so that the cushioning effect of each part of the packaging liner 5 changes significantly, and different raw materials are seamlessly connected, thereby reducing the resources and energy consumption of producing the packaging liner 5. A plurality of ejector pins 9 are also provided on the top surface of the cover plate 6, and the ejector pins 9 penetrate the cover plate 6. When the packaging liner 5 is separated from the bottom mold 4 by the cylinder 7, the transfer mold 1 is removed from the top of the fixed mold 2, and then the packaging liner 5 is ejected from the inside of the transfer mold 1 by the ejector pins 9, thereby completing the whole process of producing the packaging liner 5.

[0039] like Figure 1 As shown, the number of the cylinders 7 is set to four, and the four cylinders 7 are respectively located at the corners around the top of the cover plate 6, the cylinders 7 penetrate the cover plate 6, and the output ends of the cylinders 7 are located on the inner side of the shifting mold 1; the cylinders 7 distributed at the four corners of the cover plate 6 are respectively connected to the four corners of the top surface of the packaging liner 5 through four stoppers 10, and the four cylinders 7 work simultaneously, which can make the packaging liner 5 always in a horizontal state inside the shifting mold 1, and avoid the packaging liner 5 from tilting inside the shifting mold 1.

[0040] The output end of the cylinder 7 is provided with a stopper 10, and the four stoppers 10 are respectively located at the four corners of the shifting mold 1, and the bottom ends of the four stoppers 10 are respectively fitted with the corners of the top surface of the packaging liner 5. Exemplarily, when only one cylinder 7 works to drive the packaging liner 5 to move inside the shifting mold 1 through the stopper 10, the packaging liner 5 will inevitably be offset inside the shifting mold 1, and there will be an extrusion force between the side of the packaging liner 5 and the inner wall of the shifting mold 1, which increases the sliding friction between the side of the packaging liner 5 and the inner wall of the shifting mold 1, increases the sliding wear of the packaging liner 5, and further affects the production of the packaging liner 5. The four cylinders 7 simultaneously drive the packaging liner 5 to move inside the shifting mold 1 through the stopper 10, and friction is generated between the side of the packaging liner 5 and the inner wall of the shifting mold 1. Compared with the tilted state, there is no pressure between the horizontally arranged packaging liner 5 and the inner wall of the shifting mold 1 to increase the friction, thereby reducing the production loss of the packaging liner 5.

[0041] like Figure 2 and Figure 3 As shown, the overall shape of the stopper 10 is set as an L-shaped bent plate, the bent portion of the stopper 10 is provided with a plate, the output end of the cylinder 7 is fixedly connected to the plate of the bent portion of the stopper 10, and the plate and the stopper 10 are set as one body; the L-shaped structure enhances the strength of the stopper 10 while reducing the contact area between the stopper 10 and the packaging liner 5. When the ejector pin 9 enters the interior of the transfer mold 1, the bottom end of the ejector pin 9 contacts the top surface of the packaging liner 5, and the packaging liner 5 is ejected from the interior of the transfer mold 1 by the ejector pin 9, the stopper 10 of the L-shaped structure can quickly detach from the top surface of the packaging liner 5, so that the packaging liner 5 can quickly detach from the transfer mold 1 and the stopper 10, ensuring the rapid production effect of the packaging liner 5. The ends of the stopper 10 are respectively set corresponding to the adjacent side walls inside the transfer mold 1, and the stopper 10 is between the cover plate 6 and the packaging liner 5.

[0042] like Figure 2 , 3 As shown in Figure 4, a double top protrusion 11 is provided at the center of the top surface of the bottom mold 4, and a double hole groove 12 is provided at the center of the packaging liner 5. The double top protrusion 11 and the double hole groove 12 are correspondingly buckled; a limit plate 13 is provided at the inner center of the double hole groove 12, and the limit plate 13 and the center of the double top protrusion 11 are correspondingly buckled. The top surface of the limit plate 13 is flush with the top surface of the packaging liner 5, and the top of the double top protrusion 11 passes through the double hole groove 12, and the height of the double top protrusion 11 is greater than the thickness of the packaging liner 5. When the EPS raw material is formed inside the transfer mold 1, the stacking height of the EPS raw material inside the transfer mold 1 does not exceed the top surface of the double top protrusion 11, and then the double top protrusion 11 cooperates with the packaging liner 5, so that the double hole groove 12 is formed on the top surface of the packaging liner 5. A groove is provided at the center of the double top protrusion 11, and the EPS raw material forms a limiting plate 13 inside the groove. The double top protrusion 11 can save the amount of EPS raw material, and the limiting plate 13 increases the overall strength of the packaging liner 5. When the packaging liner 5 supports the household appliances, the limiting plate 13 increases the manufacturing effect of the packaging liner 5 on the household appliances, and also increases the overall buffering strength of the packaging liner 5.

[0043] like Figure 3 As shown, both sides of the bottom of the packaging liner 5 are provided with clamping strips 14, and both sides of the top surface of the bottom mold 4 are provided with clamping grooves 15 corresponding to the clamping strips 14. The bottom mold 4 has the same width and length as the packaging liner 5. The clamping strips 14 cooperate with the clamping grooves 15, so that the bottom surface of the packaging liner 5 forms a placement plate required by the electrical appliance, thereby increasing the matching effect between the packaging liner 5 and the bottom surface of the electrical appliance. The actual corresponding direction of the packaging liner 5 can be increased through the clamping strips 14, and the corresponding position of the packaging liner 5 can be quickly adjusted according to the placement position of the electrical appliance, thereby increasing the placement effect of the electrical appliance and the packaging liner 5.

[0044] The surface of the packaging liner 5 is provided with a corresponding hole 16, which is located on one side of the stopper 10 and on one side of the double-hole groove 12. The top surface of the bottom mold 4 is provided with a corresponding block that matches the corresponding hole 16, which is located on one side of the double-top convex block 11. Through the matching of the corresponding block with the corresponding hole 16, the matching of the double-top convex block 11 with the double-hole groove 12, the packaging liner 5 can be stably located at the top of the bottom mold 4, and the EPS raw material penetrates into various parts of the top of the bottom mold 4, thereby forming the packaging liner 5 according to the shape of the bottom mold 4. When the EPS raw material is introduced into the top of the bottom mold 4 through the material gun 8, different EPS raw materials can be introduced into different positions of the bottom mold 4 through different material guns 8 according to actual needs.

[0045] The present invention also provides a production process for producing a double-sealed refrigerator EPS packaging liner, the production process using the double-sealed refrigerator EPS packaging liner production mold as described above, comprising the following steps:

[0046] Assemble the transfer mold 1 and the solid mold 2. After placing the transfer mold 1 on the top of the solid mold 2, the bottom of the transfer mold 1 is placed corresponding to the four sides of the bottom plate 3, and the cylinder 7, the material gun 8 and the ejector pin 9 are installed on the surface of the cover plate 6, and then the cover plate 6 is placed corresponding to the top opening of the transfer mold 1, thereby completing the assembly process of the transfer mold 1 and the solid mold 2.

[0047] The EPS raw material is processed; illustratively, the EPS raw material processing includes the following steps:

[0048] 1. Check that the steam pressure of the main pipeline is between 0.4 and 0.45 MPa. After decompression, it is within the range of 0.06 to 0.1 MPa. Check that the air pressure is between 0.4 and 0.6 MPa.

[0049] 2. Determine the specifications and models of the raw materials to be prepared in advance, move the raw material bags to the platform above the hopper, first cut the seams on the raw material bags with a blade, and collect the removed threads. It is strictly forbidden for the threads to fall into the raw materials; then cut the inner bag seal of the raw material bag with a blade and pour the materials into the hopper.

[0050] 3. Set the time, pressure and other parameters according to the set parameters.

[0051] 4. Semi-automatic foaming of EPS raw materials requires testing of density accuracy in each cycle. Modify the feed weight according to the deviation and then proceed to the next foaming cycle. After adjusting the weight value corresponding to the density, fully automatic production can be carried out. When the measured density is higher than the pre-foaming standard, reduce the feed amount; when the measured density is lower than the pre-foaming standard, increase the feed amount. (Calculation method: original feed weight × target density ÷ measured density = adjusted feed amount).

[0052] 5. Observe the second vibrating rod of the level meter to ensure that the level meter works normally.

[0053] 6. When the first cycle of heating is completed, when the machine opens the discharge door, the drying motor, vibration motor, flap motor and feeding fan are started in sequence to collect the EPS raw materials after the first cycle of heating.

[0054] 7. Raw material density detection: Take samples from the automatic discharge valve in the middle of the vulcanized bed, fill the measuring cup, and use a ruler to remove the raw materials above the measuring cup to check the uniformity of foaming and whether there are cracks, shrinkage, and wrinkles on the surface.

[0055] 8. Confirm whether the materials in the maturation silo meet the maturation standards.

[0056] 9. Connect the feeding pipe to the required conveying pipe of the molding machine and ensure that there is no air leakage in each conveying link.

[0057] Then the processed EPS raw material is passed into between the transfer mold 1 and the fixed mold 2 through the material gun 8;

[0058] Steam heating is performed on the surfaces of the transfer mold 1 and the fixed mold 2 to sinter the EPS raw material;

[0059] The sintered EPS raw material is shaped by water cooling and vacuum stabilization;

[0060] Under the cooperation of the cylinder 7 and the ejector pin 9, the shaped EPS raw material is demoulded to form a packaging liner 5.

[0061] Furthermore, before steam heating the surfaces of the transfer mold 1 and the fixed mold 2, the EPS raw material needs to be tested, and the specific testing steps include:

[0062] Determine whether the density and model of raw materials meet the actual values ​​of the set parameters;

[0063] If it does not meet the requirements, clean up the remaining EPS raw materials, and then add the EPS raw materials that meet the actual values ​​of the set parameters to the input end of the material gun 8;

[0064] If it meets the requirements, steam heating is performed on the surfaces of the transfer mold 1 and the fixed mold 2.

[0065] When the EPS raw material is sintered, the EPS particles are sintered together by using cross-cutting steam heating and double-sided steam heating, and then the packaging liner 5 is formed inside the transfer mold 1 through water cooling and vacuum stabilization.

[0066] The present invention realizes local independent spaces inside the transfer mold 1 and the fixed mold 2 by modifying the mold, injects different EPS raw materials into the independent spaces through the material gun 8, and seamlessly integrates different EPS raw materials under the mode of cross-cutting steam heating and double-sided steam heating, thereby solving the performance and cost problems of the product and meeting customer needs.

[0067] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mold for producing double-sealed refrigerator EPS packaging liner, characterized by: It comprises a transfer mold (1) and a fixed mold (2), wherein the sides of the fixed mold (2) are provided with a bottom plate (3) corresponding to the inner side surface of the bottom of the transfer mold (1), the top of the bottom plate (3) is provided with a bottom mold (4), a packaging liner (5) is provided between the transfer mold (1) and the bottom mold (4), the top surface of the transfer mold (1) is provided with a cover plate (6), the surface of the cover plate (6) is provided with a plurality of cylinders (7), the number of the cylinders (7) is set to four, the four cylinders (7) are respectively located at the corners of the top of the cover plate (6), the cylinders (7) penetrate the cover plate (6), and the output end of the cylinder (7) is located on the inner side of the transfer mold (1), the outer side of the cylinder (7) is provided with a plurality of material guns (8), and the bottom end of the material gun (8) penetrates the cover plate (6), and the top surface of the cover plate (6) is also provided with a plurality of ejector pins (9), and the ejector pins (9) penetrate the cover plate (6); The output end of the cylinder (7) is provided with a stopper (10), and the four stoppers (10) are respectively located at the four corners of the transfer mold (1), and the bottom ends of the four stoppers (10) are respectively in contact with the corners of the top surface of the packaging liner (5); The overall shape of the stopper (10) is set as an L-shaped bent plate, the bent portion of the stopper (10) is provided with a contact plate, the output end of the cylinder (7) is fixedly connected to the contact plate of the bent portion of the stopper (10), and the contact plate and the stopper (10) are arranged as one body; The ends of the stopper (10) are respectively arranged corresponding to adjacent side walls inside the transfer mold (1), and the stopper (10) is located between the cover plate (6) and the packaging liner (5).

2. The mold for producing double-sealed refrigerator EPS packaging liner according to claim 1, characterized in that: A double top convex block (11) is arranged at the center of the top surface of the bottom mold (4), and a double hole groove (12) is arranged at the center of the packaging liner (5), and the double top convex block (11) and the double hole groove (12) are correspondingly buckled; A limiting plate (13) is provided at the inner center of the double-hole groove (12), and the limiting plate (13) is buckled correspondingly with the center of the double top protrusion (11), the top surface of the limiting plate (13) is flush with the top surface of the packaging liner (5), the top of the double top protrusion (11) passes through the double-hole groove (12), and the height of the double top protrusion (11) is greater than the thickness of the packaging liner (5).

3. The mold for producing the double-sealed refrigerator EPS packaging liner according to claim 2, characterized in that: Both sides of the bottom of the packaging liner (5) are provided with clamping strips (14), and both sides of the top surface of the bottom mold (4) are provided with clamping grooves (15) corresponding to the clamping strips (14). The bottom mold (4) and the packaging liner (5) have the same width and length.

4. The mold for producing the double-sealed refrigerator EPS packaging liner according to claim 3, characterized in that: The surface of the packaging liner (5) is provided with a corresponding hole (16), the corresponding hole (16) is located on one side of the stopper (10), and the corresponding hole (16) is located on one side of the double-hole groove (12), and the top surface of the bottom mold (4) is provided with a corresponding block corresponding to the corresponding hole (16), and the corresponding block is located on one side of the double-top protrusion (11).

5. A production process for producing double-sealed refrigerator EPS packaging lining, characterized in that: The production process uses the mold for producing the double-sealed refrigerator EPS packaging liner as claimed in claim 4, and includes the following steps: Assembling the transfer mold (1) and the fixed mold (2), processing the EPS raw material, and then passing the processed EPS raw material between the transfer mold (1) and the fixed mold (2) through a material gun (8); Steam heating is performed on the surfaces of the transfer mold (1) and the fixed mold (2) to fuse the EPS raw material; The sintered EPS raw material is shaped by water cooling and vacuum stabilization; Under the cooperative action of the cylinder (7) and the ejector pin (9), the shaped EPS raw material is demoulded to form a packaging liner (5).

6. The production process for producing double-sealed refrigerator EPS packaging liner according to claim 5, characterized in that: Before steam heating the surfaces of the transfer mold (1) and the fixed mold (2), the EPS raw material needs to be tested. The specific testing steps include: Determine whether the density and model of raw materials meet the actual values ​​of the set parameters; If it does not meet the requirements, the remaining EPS raw materials are cleaned up, and then EPS raw materials that meet the actual values ​​of the set parameters are added to the input end of the material gun (8); If the conditions are met, steam heating is performed on the surfaces of the transfer mold (1) and the fixed mold (2).

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