Compressing and rolling method of sponge sofa

Abstract

The invention discloses a sponge sofa compressing and rolling method, which belongs to the technical field of sofa packaging, and comprises the following steps: testing the loss rate of sponge after resilience under different compression rates; presetting a loss rate, and determining a compression rate required by the sofa through testing; a preset compression ratio is obtained according to a set loss rate target, and the diameter and the volume of the barrel bag are calculated; filling the sofa with a PE (polyethylene) vacuum bag, compressing the sofa with a compressor at a compression rate exceeding a preset compression rate, and then curling the sofa; the sponge sofa can be rolled by a machine or manually, the rolled sofa is sleeved with the barrel bag with the diameter, the PE vacuum bag is broken, and air is discharged into the PE vacuum bag, so that the sponge sofa expands in the barrel bag, expands to the size of the barrel bag and is limited by the barrel bag, the set loss rate target is achieved, and rolling and packaging are completed. The compression and rolling method of the sponge sofa solves the problems that the sofa is easy to deform excessively and the loss rate of the sponge cannot be controlled in the existing compression technology.

Description

Technical Field

[0001] The invention relates to the technical field of sofa packaging, in particular to a compression and rolling method for a sponge sofa. Background Art

[0002] There are two compression technologies for compression sofas in the existing market. One is vertical downward compression. This method is to apply force downward, and when it expands, it will expand upward. Because the height of the sofa back, the height of the armrests, and the height of the cushions are not consistent, when the sofa is compressed downward, the loss rate of each part will be different, resulting in loose sofa covers after the sofa is opened, and the rolling package cannot control the compression volume, that is, the compression rate cannot be controlled, resulting in different sofa loss rates in each position. After opening, the sofa height in each position is different, uneven, and the sofa is excessively deformed; the other is vacuum compression. This method applies force to the middle of the sofa, and when it expands, it expands 360 degrees outward. The vacuum compression method is also difficult to control the compression rate, resulting in excessive deformation of the sofa. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention provides a compression and rolling method for a sponge sofa to solve the above problems.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a compression and rolling method for a sponge sofa, comprising the following steps: S1: First test the loss rate of the sofa after the sponge rebounds under different compression rates; S2: presetting a loss rate target, and determining the required compression rate of the sofa through the test in step S1 as the preset compression rate B; S3: Calculate the volume of the sofa sponge after compression using the preset compression rate B and the volume of the sofa sponge before compression; take the volume of the sponge after compression as the volume of the tube bag, and take the width of the sponge sofa as the height of the tube bag, so as to calculate the diameter D and volume of the tube bag; S4: Pack the sofa with a PE vacuum bag, compress the sofa with a compressor using a compression rate exceeding a preset compression rate B, and then roll up the sofa; S5: Put the rolled-up sofa into a tube bag with a diameter of D, break the PE vacuum bag, and release air into the PE vacuum bag to make the sponge sofa expand in the tube bag. After expanding to the volume of the tube bag, it is restricted by the tube bag to achieve the set loss rate target and complete the rolling.

[0005] Preferably, the step S1 comprises: S11: assigning different compression rates to different sponges and performing compression; S12: After the sponge rebounds, the compression loss rate of the sponge at different compression rates is calculated.

[0006] Optionally, step S2 includes: S21: preset loss rate after the sponge sofa rebounds; S22: Screen out sponges whose compression loss rate is less than or equal to a preset loss rate, and record the compression rate of the sponge used in step S1 as a preset compression rate B of the sponge sofa.

[0007] Specifically, step S11 includes: obtaining multiple groups of sponges of consistent sizes, sorting these sponge groups, and setting compression rates with increasing values ​​for these sponge groups according to the sorting, wherein the compression rates of the sponges in each sponge group are consistent, calculating the compressed thickness H of the sponges in each sponge group through these compression rates, and compressing the sponges in each sponge group according to the compressed thickness H of each sponge group.

[0008] It is worth noting that step S12 includes: releasing the compression of the sponge in the sponge group and allowing it to rebound naturally after standing for a preset compression time, and measuring the thickness of the sponge in each sponge group after standing for a preset rebound time, and calculating the compression loss rate of the sponge by the thickness of the sponge sofa before compression and the thickness of the sponge after compression and rebound.

[0009] Preferably, in step S11, the thickness H of the sponge in each sponge group after compression is obtained by the compression rate, H=E*(1-compression rate), and E is the thickness of the sponge sofa before compression.

[0010] Optionally, in step S11, the preset compression time is greater than or equal to 72 hours.

[0011] Preferably, in step S12, the preset rebound time is greater than or equal to 48 hours.

[0012] Specifically, in step S11, the ambient temperature during compression is between 70°C and 80°C.

[0013] The beneficial effect of the present invention is that in the compression and wrapping method of the sponge sofa, after the loss rate is set to a certain value, the compression rate is determined from the loss rate, and the upper limit of the compression rate of the sponge sofa is controlled by the diameter of the tube bag to achieve the goal of controlling the loss rate, so that the sponge sofa will not be excessively deformed after compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a flowchart of a method for compressing and rolling a sponge sofa in one embodiment of the present invention. DETAILED DESCRIPTION

[0015] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] like Figure 1 As shown, a compression and rolling method for a sponge sofa comprises the following steps: S1: First test the loss rate of the sofa after the sponge rebounds under different compression rates; S2: Preset a loss rate target according to the required recovery effect, and determine the required compression rate of the sofa as the preset compression rate B through the test in step S1; S3: The volume of the sofa sponge after compression is calculated using the preset compression rate B and the volume of the sofa sponge before compression; the volume of the sponge after compression is used as the volume of the tube bag, and the width of the sponge sofa is used as the height of the tube bag, thereby calculating the diameter D and volume of the tube bag; in this embodiment, the diameter and volume of the tube bag can be calculated by the preset compression rate B of the sofa sponge volume: for example, the actual size of the sofa is 2 meters long, 0.9 meters wide, and 0.7 meters high, the volume V0 of the sofa sponge before compression is 1 cubic meter, and the preset compression rate B is 80% , then the volume V1 of the sofa's sponge after compression is 1*(1-80%)=0.2 cubic meters, and the volume V2 of the tube bag is 0.2 cubic meters; after compression, the sofa curls in the direction of its width. In this embodiment, the width of the sofa is 0.9 meters, so the height h of the tube bag needs to be 0.9 meters to match the width of the sofa. In this way, the radius r of the tube bag can be calculated by the formula of cylindrical volume V=π*r²*h, and then the diameter d of the tube bag can be obtained according to the radius r; in this embodiment, the diameter d of the tube bag can be obtained to be 0.47 meters. Because the length of the sponge compression time and the temperature in the container will affect the loss rate, the best control range of the diameter d of the tube bag is to increase the range by about 4 cm, that is, the best diameter of the tube bag is 47cm to 51cm. A larger diameter d will affect the transportation cost, and a smaller diameter d will affect the sofa recovery effect; S4: Pack the sofa with a PE vacuum bag, compress the sofa with a compressor using a compression rate exceeding a preset compression rate B, and then roll up the sofa; S5: Put the rolled sofa into a tube bag with a diameter of D, break the PE vacuum bag, and release air into the PE vacuum bag to make the sponge sofa expand in the tube bag. After expanding to the volume of the tube bag, it is restricted by the tube bag to achieve the set loss rate target and complete the rolling. Since the sponge sofa can reach the preset compression rate B after being restricted by the tube bag, it can achieve the set loss rate target.

[0017] In the compression and wrapping method of the sponge sofa, after the loss rate is set to a certain value, the compression rate is determined from the loss rate, and the upper limit of the compression rate of the sponge sofa is controlled by the diameter of the tube bag to achieve the goal of controlling the loss rate, so that the sponge sofa will not be excessively deformed after compression.

[0018] In this embodiment, the material of the tubular bag is one of Oxford cloth, composite woven kraft paper and thickened non-woven fabric to ensure toughness and prevent the force of the cotton from expanding too much during the expansion process, which may cause the tubular bag to burst and create logistics and transportation risks.

[0019] Preferably, the step S1 comprises: S11: assigning different compression rates to different sponges and performing compression; S12: After the sponge rebounds, the compression loss rate of the sponge at different compression rates is calculated.

[0020] Preferably, the step S2 comprises: S21: presetting a preset loss rate of the sponge sofa after rebounding; in this embodiment, the loss rate of the sofa after opening is first set to be controlled at 2%, so the preset loss rate is preset to 2%, and the rebound recovery rate is 98%; S22: Screen out sponges with compression loss rates less than or equal to a preset loss rate, and record the compression rate used by the sponge in step S1 as the preset compression rate B of the sponge sofa. Therefore, the compression rate with a loss rate of less than 2% from 84% to 90% is the target indicator to be controlled in step S1.

[0021] Optionally, the step S11 includes: obtaining multiple groups of sponges of the same size (5 sponge samples per group, 6 groups in total, 30 sponge samples in total, and the size of these 30 sponge samples is 30cm×30cm×30cm), sorting these sponge groups, and setting compression rates with increasing values ​​for these sponge groups according to the sorting (the compression rate ranges from 84% to 90%, and the corresponding loss rate is tested with different compression rates. It can be evaluated how much range the volume of the tube bag should be controlled to be optimal. When the customer needs different packaging solutions, the effect of sponge sofa recovery can be estimated), wherein the compression rate of the sponges in each sponge group is the same, and the compressed thickness H of the sponge of each sponge group is calculated according to these compression rates (the thickness of the first group of sponge samples compressed according to the compression rate is 30*(1-84%)=4.8cm, and so on), and the sponge of each sponge group is compressed according to the compressed thickness H of each sponge group; Specifically, step S12 includes: releasing the compression of the sponge in the sponge group and allowing it to rebound naturally after standing for a preset compression time, and measuring the thickness of the sponge in each sponge group after standing for a preset rebound time (wherein the thickness of the sponge in each sponge group is the average thickness of the 5 sponge samples in the group after natural rebound), and calculating the compression loss rate of the sponge by the thickness of the sponge sofa before compression and the thickness of the sponge after compression and rebound. The loss rate of the sponge is 1-(thickness of the sponge after compression and rebound / thickness of the sponge sofa before compression). For example, the average thickness of the 5 sponge samples in the group with a compression rate of 84% after natural rebound is 29.5, and its loss rate is 1-(29.5 / 30)=1.66%.

[0022] It is worth noting that, in step S11, the thickness H of the sponge in each sponge group after compression is obtained by the compression rate, H=E*(1-compression rate), and E is the thickness of the sponge sofa before compression.

[0023] Specifically, in step S11, the preset compression time is greater than or equal to 72 hours. The compression time is set to be greater than or equal to 72 hours to ensure that the sponge is fully compressed to the target compression ratio.

[0024] Optionally, in step S12, the preset rebound time is greater than or equal to 48 hours. The rebound time is set to be greater than or equal to 48 hours to ensure that the sponge rebounds completely naturally.

[0025] Preferably, in step S11, the ambient temperature during compression is between 70° C. and 80° C. The purpose of the ambient temperature during compression being between 70° C. and 80° C. is to simulate the temperature of the goods when they are placed in the container during transportation. Both sponge and glue will undergo chemical changes due to temperature, so the environmental conditions of the goods during transportation should be simulated.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A compression and rolling method for a sponge sofa, characterized in that: The following steps are involved: S1: First test the loss rate of the sofa after the sponge rebounds under different compression rates; S2: presetting a loss rate target, and determining the required compression rate of the sofa through the test in step S1 as the preset compression rate B; S3: Calculate the volume of the sofa sponge after compression using the preset compression rate B and the volume of the sofa sponge before compression; take the volume of the sponge after compression as the volume of the tube bag, and take the width of the sponge sofa as the height of the tube bag, so as to calculate the diameter D and volume of the tube bag; S4: Pack the sofa with a PE vacuum bag, compress the sofa with a compressor using a compression rate exceeding a preset compression rate B, and then roll up the sofa; S5: Put the rolled-up sofa into a tube bag with a diameter of D, break the PE vacuum bag, and release air into the PE vacuum bag to make the sponge sofa expand in the tube bag. After expanding to the volume of the tube bag, it is restricted by the tube bag to achieve the set loss rate target and complete the rolling.

2. The compression and rolling method of a sponge sofa according to claim 1, characterized in that: The step S1 comprises: S11: assigning different compression rates to different sponges and performing compression; S12: After the sponge rebounds, the compression loss rate of the sponge at different compression rates is calculated.

3. The compression and rolling method of a sponge sofa according to claim 2, characterized in that: The step S2 comprises: S21: preset loss rate after the sponge sofa rebounds; S22: Screen out sponges whose compression loss rate is less than or equal to a preset loss rate, and record the compression rate of the sponge used in step S1 as a preset compression rate B of the sponge sofa.

4. The compression and rolling method of a sponge sofa according to claim 3, characterized in that: The step S11 comprises: obtaining a plurality of groups of sponges of the same size, sorting the sponge groups, and setting compression rates with increasing values ​​for the sponge groups according to the sorting, wherein the compression rates of the sponges in each sponge group are the same, calculating the compressed thickness H of the sponge in each sponge group according to the compression rates, and compressing the sponge in each sponge group according to the compressed thickness H of each sponge group.

5. The compression and rolling method of a sponge sofa according to claim 4, characterized in that: The step S12 comprises: releasing the compression of the sponges in the sponge group and allowing them to rebound naturally after standing for a preset compression time, and measuring the thickness of the sponges in each sponge group after standing for a preset rebound time, and calculating the compression loss rate of the sponge by the thickness of the sponge sofa before compression and the thickness of the sponge after compression and rebound.

6. The compression and rolling method of a sponge sofa according to claim 5, characterized in that: In the step S11, the thickness H of the sponge in each sponge group after compression is obtained by the compression ratio, H=E*(1-compression ratio), where E is the thickness of the sponge sofa before compression.

7. The compression and rolling method of a sponge sofa according to claim 6, characterized in that: In the step S11, the preset compression time is greater than or equal to 72 hours.

8. The compression and rolling method of a sponge sofa according to claim 7, characterized in that: In the step S12, the preset rebound time is greater than or equal to 48 hours.

9. The compression and rolling method of a sponge sofa according to claim 8, characterized in that: In the step S11, the ambient temperature during compression is between 70°C and 80°C.

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