JP2013159073A5

JP2013159073A5 -

Info

Publication number: JP2013159073A5
Application number: JP2012024091A
Authority: JP
Filing date: 2012-02-07
Publication date: 2015-03-26
Anticipated expiration: 2032-02-07

Description

次に、図１に示す熱溶着装置を用いた熱溶着方法について、図２の動作フローを用いて説明する。ステップ１（Ｓ１）では、バックアップ３３に蓋１１と容器１２がセットされ、加熱体２１は蓋１１から離れた位置に待機している。また、加熱体２１は加熱手段２２によって熱せられて加熱状態にある。次にステップ２（Ｓ２）では、加熱体２１全体が押圧手段３１によって移動され所定の移動速度切り替えポイントまで高速移動する。移動速度切り替えポイントは、本実施形態の場合、加熱体２１と蓋１１が接触する位置より０.５ｍｍ以上手前とする。その後、ステップ３（Ｓ３）で押圧手段３１の移動速度の切り替えを行い、ステップ４（Ｓ４）で１０ｍｍ/ｓｅｃ以下の低速の状態で加熱体２１全体が移動開始する。ステップ５（Ｓ５）で低速のまま加熱体２１と蓋１１が接触し、熱可塑性樹脂同士が溶融し始めることで徐々に荷重が高まる。次にステップ６（Ｓ６）で、所定の接触荷重を検出するまで押圧手段３１は移動を続け、加熱体２１と蓋１１が接触したと判断する。その後、ステップ７（Ｓ７）で接触荷重から溶着荷重まで所定の時間で荷重が切り替わるように移動を続け、ステップ８（Ｓ８）で所定の溶着荷重に到達する。次にステップ９（Ｓ９）では、ステップ７の時点での現在位置をゼロ点とし、所定の溶込量に到達するまで荷重が一定になるように移動を続ける。その際、ステップ７、８とステップ９とは同時に行われる。ステップ９で溶込量が所定の値に達した後、ステップ１０（Ｓ１０）で溶着完了となる。その後、ステップ１１（Ｓ１１）で加熱体２１全体がステップ１の際の位置に戻るよう高速移動を開始する。ステップ１と同一の位置に戻ったステップ１２（Ｓ１２）の時点で１サイクル動作が終了する。 Next, a heat welding method using the heat welding apparatus shown in FIG. 1 will be described using the operation flow of FIG. In step 1 (S 1), the lid 11 and the container 12 are set on the backup 33, and the heating body 21 stands by at a position away from the lid 11. The heating body 21 is heated by the heating means 22 and is in a heated state. Next, in step 2 (S2), the entire heating body 21 is moved by the pressing means 31 and moved to a predetermined moving speed switching point at a high speed. In the case of this embodiment, the moving speed switching point is 0.5 mm or more before the position where the heating body 21 and the lid 11 are in contact. Thereafter, the moving speed of the pressing means 31 is switched at step 3 (S3), and the entire heating element 21 starts moving at a low speed of 10 mm / sec or less at step 4 (S4). In step 5 (S5), the heating body 21 and the lid 11 are kept in contact with each other at a low speed, and the thermoplastic resin begins to melt, whereby the load is gradually increased. Next, in step 6 (S6), the pressing means 31 continues to move until a predetermined contact load is detected, and it is determined that the heating body 21 and the lid 11 are in contact. Thereafter, in step 7 (S7), the movement is continued so that the load is switched in a predetermined time from the contact load to the welding load, and the predetermined welding load is reached in step 8 (S8). Next, in step 9 (S9), the current position at the time of step 7 is set as a zero point, and the movement is continued so that the load becomes constant until a predetermined penetration amount is reached. At that time, Steps 7 and 8 and Step 9 are performed simultaneously. After the penetration amount reaches a predetermined value in step 9, the welding is completed in step 10 (S10). After that, in step 11 (S11), high-speed movement is started so that the entire heating element 21 returns to the position in step 1. At the time of step 12 (S12) when returning to the same position as step 1, the one-cycle operation ends .

このように、図２に示す動作フローの熱溶着方法を行うことで溶着物や被溶着物の個体差による影響を受けることなく常に安定した溶着強度を達成できるよう管理することができる。
なお、上記の熱溶着装置において、加熱体と蓋が接触した直後の接触荷重を検出した位置からの変位量（移動量）を管理可能とする変位量管理用に、エンコーダや渦電流センサのような位置検出手段を有するアクチュエータを備えていてもよい。

In this way, by performing the heat welding method of the operation flow shown in FIG. 2, it is possible to manage so that a stable welding strength can be always achieved without being affected by individual differences in the welded material and the welded material.
In the above-mentioned heat welding apparatus, an encoder or an eddy current sensor is used for displacement amount management that makes it possible to manage the displacement amount (movement amount) from the position at which the contact load is detected immediately after the heating body contacts the lid. An actuator having various position detecting means may be provided.

Claims

A heat welding apparatus for melting and joining a packaging material made of thermoplastic resin by heat,
A heating element having a heating means;
A pressing means for moving the heating body;
Load detecting means for detecting a load applied to the heating body;
Anda displacement detection means for said load detecting means detects a movement amount of the heating body from the detection of a predetermined value
The heat welding apparatus, wherein the pressing means is moved until the moving amount reaches a predetermined value .

The thermal welding apparatus according to claim 1, wherein the displacement detection means is an encoder or an eddy current sensor .

It said pressing means, thermal welding apparatus according to claim 1 or 2, characterized in that the electric actuator.

The heat welding apparatus according to any one of claims 1 to 3 , wherein the heating means is a heater.

A thermal welding method in which a packaging material made of a thermoplastic resin is melted and joined by heat,
Move the heating element to contact the packaging material,
The heating body is further moved until a predetermined load is reached from the contact load at the time of the contact,
The thermal welding method characterized by joining the packaging material by further moving the heating body until reaching a predetermined penetration amount after reaching the predetermined load .

6. The heat welding method according to claim 5, wherein the heating body is moved so that the load becomes constant until the predetermined penetration amount is reached after reaching the predetermined load .

The heat welding method according to claim 5 or 6, wherein a rib of a container of the packaging material is melted and joined .

The heat welding method according to claim 7 , wherein a width of the rib is narrowed as a height is increased.

The packaging material joined by the heat welding apparatus as described in any one of Claims 1-4.