阅读说明：本技术 一种遮阳板表皮与标签同步粘结工艺 (Synchronous bonding process for sun shield skin and label ) 是由 陈晓婉 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种遮阳板表皮与标签同步粘结工艺,包括以下步骤：(1)将遮阳板填充体放置于治具上,铺上预涂粘合剂的表皮；(2)表皮定位后,放置预涂粘合剂的标签；(3)对表皮与标签同步加权一定的压力与热量,并通过包压与热传导,促使粘合剂失活并晶体化,到达表皮与填充体、表皮与标签粘结的目的。与现有技术相比,本发明通过将表皮粘结与标签粘结两个工序复合,降低生产所需设备投入,提高生产节拍。避免因贴标签所需加权的热量与压力,对表皮粘结剂的二次加权导致表皮触感局部不一,表皮局部发硬,印痕问题的发生,此外,不仅节约生产成本,提高生产节拍,且同时提高总成关键节点步序半成品的合格率。(The invention relates to a synchronous bonding process of a sun shield skin and a label, which comprises the following steps: (1) placing the sun shield filler on a jig, and paving a surface skin pre-coated with the adhesive; (2) after positioning the surface, placing a label pre-coated with adhesive; (3) the skin and the label are weighted with certain pressure and heat synchronously, and the adhesive is promoted to be deactivated and crystallized through the wrapping pressure and heat conduction, so that the purposes of bonding the skin and the filler and bonding the skin and the label are achieved. Compared with the prior art, the method has the advantages that the two processes of surface adhesion and label adhesion are combined, so that the equipment investment required by production is reduced, and the production takt is improved. The skin adhesive is prevented from having local inconsistency of skin touch due to the secondary weighting of the skin adhesive caused by the heat and the pressure required by labeling, the local hardening of the skin and the occurrence of impression problems, in addition, the production cost is saved, the production beat is improved, and meanwhile, the qualification rate of semi-finished products of key node step sequences of the assemblies is improved.)

1. A process for synchronously bonding a sun shield skin and a label is characterized by comprising the following steps:

(1) placing the sun shield filler in the jig;

(2) then, spreading the adhesive-coated skin on the sun visor filler;

(3) then, coating the adhesive on the label and standing the label on the surface;

(4) and applying pressure and heating to the three-layer structure of the sun shield filler, the surface skin and the label to inactivate and crystallize the binder, so that the surface skin and the sun shield filler as well as the surface skin and the label are synchronously bonded and fixed.

2. The process of claim 1 wherein the adhesive applied between the filler and the skin of the sun visor is Sikamelt-9181 adhesive available from Sika corporation.

3. The process of claim 2 wherein the adhesive applied between the skin and the label is 81ONS glue available from 3M company.

4. A sun visor according to claims 1 and 2The synchronous bonding process of the skin and the label is characterized in that the coating amount of the adhesive coated on the filler of the sun visor and the skin is 30g/m²。

5. The process for simultaneously adhering a sun visor skin and a label according to claims 1 and 2, wherein the amount of the adhesive coated on the label is 0.015g/cm²。

6. The process of claim 4 wherein the activation temperature and activation time of the two adhesives are close so that the process of simultaneously adhering the sun visor filler to the skin and adhering the skin to the label can be achieved.

7. The process for simultaneously adhering the skin and the label of the sun visor according to claim 1, wherein the pressure applied in the step (4) is as follows: the pressure of the unit area of the surface skin and the label is 1.18 +/-0.2N/cm²。

8. The process for simultaneously adhering the skin and the label of the sun visor of claim 1, wherein in the step (4), the activation temperature of the two adhesives is 125-155 ℃.

9. The process for synchronously bonding the sun visor skin and the label according to claim 1 or 8, wherein in the step (4), the heating treatment process satisfies the following conditions: the three-layer structure of the sun shield filler, the surface skin and the label is processed through hot pressing, so that the temperature of the adhesive between the surface skin and the sun shield filler reaches 125 ℃, the temperature of the adhesive between the label and the surface skin reaches 125 ℃, and then the pressure is maintained for 10-15 s.

Technical Field

The invention belongs to the technical field of part bonding, and relates to a synchronous bonding process of a sun shield skin and a label.

Background

When the sun shield is processed, the skin and the label are generally divided into two procedures to be finished respectively, and the used colloid has larger difference due to the property difference of the bonding surface. This, in turn, generally creates the following problems: 1. different colloids are not beneficial to uniformity of manufacturability, and operation is troublesome; 2. the surface skin and the label are separately pressed by different processes, and the problem of mutual activation exists, so that the quality defect problem is caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a process for synchronously bonding a sun visor skin and a label.

The purpose of the invention can be realized by the following technical scheme:

a process for synchronously bonding a sun shield skin and a label comprises the following steps:

(1) placing the sun shield filler in the jig;

(2) then, spreading the adhesive-coated skin on the sun visor filler;

(3) then, coating the adhesive on the label and standing the label on the surface;

(4) and applying pressure and heating to the three-layer structure of the sun shield filler, the surface skin and the label to inactivate and crystallize the binder, so that the surface skin and the sun shield filler as well as the surface skin and the label are synchronously bonded and fixed.

Further, the adhesive applied between the sun visor filler and the skin is SikaMelt-9181 cement available from Sika corporation. Further, the adhesive applied between the skin and the label is 81ONS glue available from 3M company.

In the present invention, the adhesive preferably employs SikaMelt-9181 glue from Sika and 81ONS glue from 3M, which have the following characteristics: after the composition is labeled, the adhesive has the characteristics of 10 minutes activity at the ambient temperature of 22 ℃, and has the characteristics of repeated adjustment, namely sliding movement and the like in the activity state. Meanwhile, the crystallization aging process of the binder is inversely proportional to the crystallization environment temperature. Under the condition of normal temperature of 22 ℃, the bonding strength aging needs 20 minutes, and under the crystallization environment temperature of 125 ℃, the bonding strength aging needs only 15 seconds, so that the same effect of normal temperature of 20 minutes can be achieved.

Furthermore, when the label is placed on the surface, the phenomenon that the adhesive is remained outside the non-label adhesive area is avoided, and the label is required to be placed and positioned according to positioning.

Further, the glue coating amount between the sun visor filling body and the epidermis is 30g/m²And the coating amount of the adhesive between the surface skin and the label is 0.015g/cm²。

Furthermore, the adhesive is applied by: the crystal of the glue is activated at high temperature, and the surface skin and the sun shield filling body are fully bonded through high pressure, so that the purpose of sticking is achieved.

Due to the adhesive force of the adhesive, the adhesive touch, the crystallization degree and the layer thickness of the adhesive have a direct relation with the crystallization environment temperature. When the thickness of the adhesive layer is insufficient, the adhesive strength is insufficient, and the adhesive layer is crystallized, and the touch is hard. When the thickness of the binder layer is too large, the binder crystallization aging is long, and the binder crystallization layers are difficult to unify, so that the touch of the binder layer is likely to be inconsistent, and local stress marks due to inconsistent crystallization appear on the surface. By the above coating technique, the coating amount of the binder of the present invention can be ensured within an appropriate range.

Further, in the step (4), the applied pressure satisfies the following conditions: the pressure of the unit area of the surface skin and the label is 1.18 +/-0.2N/cm²。

Further, in the step (4), the temperature of the heat source during heating is 155-.

Further, in the step (4), the heating treatment process satisfies the following conditions: the three-layer structure of the sun shield filler, the surface skin and the label is processed by hot pressing, so that the temperature of the adhesive between the surface skin and the sun shield filler reaches 125 ℃, the (average) temperature of the adhesive between the label and the surface skin reaches 125 ℃, and then the pressure is maintained for 10-15 s.

The same type of binder is preferred in the present invention because the two binder layers have different relative distances to the crystallization ambient temperature application source (i.e., heat source). In the same weighted aging, the heat conduction quantity of the adhesive layer at the label is different, and the surface average temperature is different, namely the heat conduction quantity of the adhesive layer at the label position is larger than that of the adhesive layer at the surface skin position, so that the adhesive layer of the label is crystallized before the adhesive layer of the surface skin, the effect of consistent touch feeling of the surface skin can be achieved while the adhesive strength is ensured.

In the invention, the crystallization environment temperature is too high, and the heat conduction quantity is large, so that the crystallization speed of the bonding agent layer is too high, the crystal stress phenomenon occurs, and the local stress mark is caused. If the crystallization environment temperature is too low, the crystallization aging is lengthened, which is not beneficial to the management and control of the production cycle, and if the weight is biased to the cycle management and control under the condition, the bonding agent layer is not crystallized, the bonding force after the bonding strength aging cannot be reached, and the bonding failure is caused.

Compared with the prior art, the invention has the following advantages:

(1) the two processes of surface bonding and label bonding are combined, so that the equipment investment required by production is reduced, and the production takt is improved. The problems that the touch sense of the surface skin is locally different, the surface skin is locally hard and the impression is caused by secondary processing of the surface skin adhesive due to the heat and the pressure which need to be applied for labeling are avoided.

(2) Under the action of external pressure, the molecular chains of the binding agent are promoted to be entangled with the respective molecular chains of the epidermis, the filling body and the label. When the molecular chain is well entangled, the application of external heat shortens the strength aging of the adhesive, so that each adhesive part completes the strength bonding aging in the jig to achieve the fixing effect. After the bonding strength is aged, the crystal can be completely crystallized in 48 hours under the normal temperature condition. Thus, the requirements for ambient temperature and moderate control are reduced. And further, the production cost can be reduced, and the production takt can be improved.

Detailed Description

The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In the following examples, unless otherwise specified, all of the conventional commercial raw materials or conventional processing techniques in the art are used.