CN108045761A - A kind of foam spacer of electrical package - Google Patents

Abstract

The invention provides a foam liner for electrical appliance packaging, which comprises an upper foam (1), a lower foam (5), a left foam (3), and a right foam (4) liners; The parts wrap the four sides of the electrical appliance; the height of the upper foam pad and the lower foam pad, and the height of the upper and lower foam pads covering the whole machine is more than 1/2 of the whole machine. The present invention relates to a packaging design of a flat-panel TV, in particular to a design of an EPS foam liner for a flat-panel TV, in particular to a structural design of an EPS foam liner for a flat-panel TV package.

Description

Foam liner for electrical appliance packaging

technical field

The invention relates to a foam liner for electrical appliance packaging, in particular to a structural design scheme of an EPS foam liner for a flat-panel TV.

Background technique

The first point of the rationality of product transportation and packaging is to truly protect the value of the product and facilitate loading, unloading, and storage; the second point is to pursue the economy of packaging. Irregular and unreasonable structural dimensions will inevitably increase the cost of transportation and storage. cost. Flat-panel TVs (the development trend of products is thinner and larger panels) due to the impact of vibration, drop, and trample in the process of sales, transportation, and storage, thin and large-panel products will be easily damaged, packaging The foam pad used should have sufficient cushioning protection capacity to ensure that the flat-panel color TV is protected from mechanical damage or its electrical performance is reduced or invalidated due to mechanical damage when it is subjected to external forces such as shock and vibration during streaming. The present invention is an improvement in the structural design for EPS foam liners.

Contents of the invention

The object of the present invention is to propose a packaging design for flat-panel televisions, especially a flat-panel television set, by changing the structural design of the foam pad, without increasing the product design cost, in view of the packaging and transportation requirements of flat-panel televisions. The design of the EPS foam liner used, specifically a kind of design scheme of the EPS foam liner used for flat-panel TV packaging. Design a flat-panel TV (electrical appliance) with good elasticity, large damping coefficient and strong protection ability EPS foam pad for flat-panel TV, so that the whole machine can effectively pass SJ/T11326-2006 Electronic Industry Standard of the People's Republic of China That is, the mechanical test in the environmental test method of digital TV receiving and display equipment, and a foam pad for flat-panel TV is designed. It is suitable for the packaging and transportation requirements of thin and large panel flat-panel TVs.

The technical solution of the present invention is: a foam liner for electrical appliance packaging, comprising an upper foam (1), a lower foam (5), a left foam (3), and a right foam (4) liners; The groove wraps the four sides of the electrical appliance at the groove; according to the test results of the original foam, it is necessary to strengthen the protection of the front (2) and back (4) of the electrical appliance, and increase the thickness of the foam pads on the front and back. Protect the area and improve the protection ability of the front and back: lengthen the height of the upper and lower foam pads, and the height of the upper and lower foam pads covering the whole machine is changed from 1/3 of the original height of the whole machine to the whole machine More than 1/2 of;

Namely: original design upper foam pad height L1 + lower foam pad height L2 = L/3

Now change to: the height of the upper foam pad L1+the height of the lower foam pad L2≥L/2; L is the height of the whole machine;

Change the foaming density of the foam pad, the density of the foam pad is changed from 0.018 to 0.020g/cm ³ to 0.015 to 0.017g/cm ³ . The smaller the density of the foam pad, the softer the foam pad, the greater the damping coefficient of the foam pad; the larger the damping coefficient of the foam pad, the more the reaction force of the external impact on the whole machine will be released, and the whole machine will be affected. The smaller the external force, the stronger the protective ability of the foam padding.

In another improvement of the present invention, half of the left foam (3) and the right foam (4) form an integral body with the upper foam (1) and the lower foam (5), so only two foam pads (with grooves in the center) , the packaging of the LCD screen can be completed, and the improvement efficiency of the packaging process is higher.

The use of flexible foam pad material EPE is also an improvement point of the present invention. Strength and flexibility are significantly higher than EPS.

Change the basic wall thickness of the foam liner, the wall thickness of the foam liner is changed from 20-25mm to 15-18mm; due to the increase of the protection area, the weight of the foam liner will increase, and in terms of packaging economy, it will increase Packaging cost, change the basic wall thickness of the foam pad, make the wall thickness thinner, increase the area, reduce the thickness, the volume will not change greatly, the density will decrease, the overall weight will remain the same or become lighter, and the packaging cost will be controlled . The thinner the wall of the foam pad, the lower the density, and the softer the foam pad, the better the protection for the machine; but it should not be too thin and the density should not be too small, otherwise the strength and rigidity of the side foam pad will not be enough, causing the entire The stacking strength of the packaging is not enough, the carton will be loose and the machine will be crushed, so the choice of density and thickness has certain requirements; in addition, the left and right foam pads are designed on the 2 sides of the machine to support the carton and also protect the stacking of the whole machine Will not be crushed.

Change the rib wall structure design shape of the upper foam (1) and the lower foam (5) liner, the rib wall of the upper foam (1) and the lower foam (5) foam liner is made of continuous "T" shaped ribs in cross section The wall is changed to a continuous "W"-shaped rib wall in cross-section, as shown in Figure 5(a) The force diagram of the original foam liner "T"-shaped rib wall, the external force F is directly applied to the whole machine through the ribs of the foam liner Above, Fig. 5(b) force diagram of the "W"-shaped rib wall of the improved foam pad, the external force F releases part of the force F2 through the ribs of the foam pad, and only part of the F1 force is applied to the entire body through the ribs of the foam pad. On the machine, F1 is much smaller than F, which protects the whole machine from external damage. Beneficial effects: the present invention can minimize the cost of packaging materials and logistics and transportation by improving the existing EPS foam pad packaging design scheme, and ensure that the machine packaging design is reasonable and reliable, and the structure is compact, effectively passing SJ/T11326- The 2006 Electronic Industry Standard of the People's Republic of China, that is, the mechanical test in the environmental test method of digital TV receiving and display equipment, can well protect the whole machine from being damaged during the process of sales, transportation and storage, and can not only protect the parts of the color TV It can also help to enhance the compressive performance of the outer packaging box, and can effectively protect the trampling and stacking of the machine. The invention provides an EPS foam liner for a flat-panel TV with good elasticity, large damping coefficient, economical and reasonable packaging, and strong protection performance. Guarantee the reliable protection of the function and structure of the TV from the factory, through transportation, storage, loading and unloading, and finally to the user. Reasonably designed foam pad packaging can not only prevent the TV from being damaged due to pressure, vibration, and impact, but also prevent damage from external forces during transportation. Tests from every angle prove it. The invention embodies the rationality of product packaging and can protect the value of products. And it is convenient for loading, unloading and storage; and the packaging is economical, and the reasonable structure size will reduce the cost of product transportation and storage.

Description of drawings

Fig. 1 Explosion diagram of foam liner in flat-panel TV packaging;

Figure 2 The division of the drop surface of the TV set with the packing box;

Figure 3(a) Force diagram of the top surface (1) (impact) of the machine at the moment of drop; maximum value G _max =28.81N;

Figure 3(b) Force diagram of the machine front (2) at the moment of drop; G _max =57.71;

Figure 3 (c) force diagram of the machine bottom (3) at the moment of drop; G _max = 27.7;

Figure 3(d) Force diagram of the back of the machine (4) at the moment of drop; G _max = 38.39;

Fig. 3 (e) force diagram of machine side (5) at the moment of drop; G _max = 22.77;

Fig. 3(f) force diagram of machine side (6) at the instant of drop; G _max =20.65;

Figure 4(a) Structural diagram of the original foam liner (upper and lower);

Figure 4(b) Structural diagram of the improved foam pad (upper and lower);

Figure 5(a) Force diagram of the T-shaped rib wall of the original foam liner;

Figure 5(b) Force diagram of W-shaped rib wall after improvement of foam pad;

Fig. 6 The packaging diagram of the combined (upper, lower, left, right) package of the improved full set of foam pads.

In the figure: 11-upper foam, 12-TV, 13-left foam, 14-right foam, 15-lower foam.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. Divide the falling surface of the TV set with packing box 1—top surface 2—front surface 3—bottom surface 4—back surface 5, 6—two sides;

As shown in Figure 1, it includes an upper foam pad, a lower foam pad, a left foam pad, and a right foam pad; the upper foam pad, the lower foam pad, the left foam pad, and the right foam pad are made of EPS (polystyrene) foamed granular material. It is an EPS foam pad suitable for flat-panel TVs with good elasticity, large damping coefficient and strong protection ability.

According to SJ/T11326-2006 Electronic Industry Standard of the People's Republic of China, that is, the mechanical test requirements in the environmental test method for digital TV receiving and display equipment: for the packaged TV, it is necessary to perform a free drop test on 3 edges, 1 corner and 6 sides.

Since the drop height of 3 edges and 1 corner is lower than that of 6 faces, it is found through the drop test that the drop of the whole machine surface is more likely to cause damage to the machine. The TV is packed with the original foam pad for drop test: The 3-point sensor tests the instantaneous impact on the 6 surfaces of the TV: the test results are as follows:

Figure 3(a) to Figure 3(f), Figure 2 shows the division of the drop surface: 1—top surface 2—front surface 3—bottom surface 4—back surface 5, 6—two sides.

Through the comparison and analysis of the test data in Figure 3(a) to Figure 3(f) and the appearance inspection of the TV, it can be known that the whole machine is subjected to the greatest external force when the front 2 and the back 4 are dropped, which is the most likely to damage the TV and cause jumping. In order to improve the original foam pad structure design and strengthen the protection of the front (2) and back (4) of the whole machine, the specific improvement measures are as follows:

1. Lengthen the height of the upper foam pad and the lower foam pad, and the height of the upper and lower foam pads covering the whole machine is changed from 1/3 of the original height of the whole machine to 1/2 of the whole machine;

2. By changing the foaming density of the foam pad, the density of the foam pad is changed from 0.018 to 0.020g/cm ³ to 0.015 to 0.017g/cm ³ .

3. By changing the basic wall thickness of the foam pad, the wall thickness of the foam pad is changed from 20-25mm to 15-18mm.

4. By changing the design shape of the rib wall structure of the foam pad, the rib wall of the foam pad is changed from a "T"-shaped rib wall to a "W"-shaped rib wall.

Increase the damping coefficient of the foam pad, the better it can relieve the external impact on the machine. Through design improvement, the foam pad has better elastic cushioning and stronger ability to protect the whole machine.

The height of the whole machine wrapped up and down by the foam liner of the present invention is changed from 1/3 of the original whole machine height to 1/2 (above) of the whole machine;

2. The density of the foam pad is changed from 0.018 to 0.020g/cm ³ to 0.015 to 0.017g/cm ³ ;

3. The basic wall thickness of the foam pad is changed from 20 to 25mm to 15 to 18mm.

4. Structural design rib wall of foam pad: The rib wall of foam pad is changed from "T" type rib wall to "W" type rib wall. Figure 2 shows the division of falling surface: 1—top surface 2— Front 3—bottom 4—back 5, 6—two sides

After testing the original foam, it is necessary to strengthen the protection of the front (2) and back (4) of the whole machine. The improvement method is as follows:

1. Increase the protective area of the front and back foam pads to improve the protection ability of the front and back: lengthen the height of the upper and lower foam pads, and the height of the upper and lower foam pads covering the whole machine is determined by 1/3 of the original height of the whole machine is changed to 1/2 of the whole machine;

Namely: original design L1+L2=L/3

Now change to: L1+L2≥L/2

As shown in Figure 4(a) the structure diagram of the original foam pad (upper and lower), the foam pad protects the whole machine with a small area, and Figure 4(b) the structure diagram of the improved foam pad (upper and lower), the foam pad The area to protect the whole machine is increased.

From the formula: G=V*ρ V=S*T

Where: G: mass V: volume ρ: density S: area T: wall thickness

Due to the increase of the protective area S, the quality G of the foam liner will increase. From the perspective of packaging economy, it will increase the packaging cost, change the basic wall thickness T of the foam liner, make the wall thickness T thinner, and increase the area S , the thickness T becomes smaller, the volume V does not change greatly, the density ρ decreases, the overall quality G remains unchanged or becomes lighter, and the packaging cost is controlled.

2. Change the foaming density ρ of the foam pad. The density ρ of the foam pad is changed from 0.018 to 0.020g/cm ³ to 0.015 to 0.017g/cm ³ . The smaller the density ρ of the foam pad, the softer the foam pad, the greater the damping coefficient of the foam pad; the larger the damping coefficient of the foam pad, the more the reaction force of the external impact on the whole machine is released, and the whole machine The less external force it is subjected to, the more protective the foam padding will be.

3. Change the basic wall thickness T of the foam pad. The wall thickness of the foam pad is changed from 20-25mm to 15-18mm. The thinner the wall of the foam pad, the smaller the density, the softer the foam pad is, and the machine The better the protection; but it should not be too thin, and the density should not be too small, otherwise the strength and rigidity of the side foam pads will not be enough, resulting in insufficient stacking strength of the entire package, the carton will be loose, and the machine will be crushed, so the density and thickness There are certain requirements for the selection; in addition, the left and right foam pads are designed on the 2 sides of the machine to support the cartons and also protect the whole machine from being crushed.

4. Change the design shape of the rib wall structure of the foam pad. The rib wall of the foam pad is changed from a "T"-shaped rib wall to a "W"-shaped rib wall, as shown in Figure 5 (a) The original foam pad "T" Force diagram of the "shaped rib wall, the external force F is directly applied to the whole machine through the ribs of the foam pad, Fig. 5(b) The force diagram of the improved foam pad "W" rib wall, the external force F is passed through the foam pad The rib releases part of the force F2, and only part of the F1 force is applied to the whole machine through the rib of the foam pad, and F1 is much smaller than F, thereby protecting the whole machine from damage by external forces. The flexible foam pad material EPE is used.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A foam liner for electrical appliance packaging, which is characterized in that it includes upper foam (1), lower foam (5), left foam (3), and right foam (4) liners; the four foam liners have grooves in the center, Wrap the four sides of the electrical appliance at the slot; the height of the upper foam pad and the lower foam pad, and the height of the upper and lower foam pads covering the whole machine are more than 1/2 of the whole machine. 2. The foam pad for electrical appliance packaging according to claim 1, characterized in that the density of the foam pad is 0.015~0.017 g/cm ³ . 3. The foam liner for electrical appliance packaging according to claim 1, characterized in that the wall thickness of the foam liner is 15-18 mm. 4. The foam gasket for electrical appliance packaging according to claim 1, characterized in that the cross section of the rib wall of the upper foam (1) and the lower foam (5) foam gasket is a continuous "W" shaped rib wall. 5. The foam liner for electrical appliance packaging according to any one of claims 1-4, characterized in that half of the left foam (3) and the right foam (4) and the upper foam (1) and lower foam (5) form a As a whole, only two M-shaped foam pads with grooves in the center are needed to complete the packaging of the flat-panel LCD screen. 6. The foam gasket for electrical appliance packaging according to any one of claims 1-4, characterized in that flexible foam gasket material EPE is used. 7. The foam pad for electrical appliance packaging according to claim 5, characterized in that flexible foam pad material EPE is used.