制作芯坯

制作芯坯

一旦木板准备就绪,下一步就是对它们进行分类并找到9块合理的木板来制造芯坯。木板不必完全笔直。如果他们都以同样的方式弯曲,那也很好。如果芯坯两端有点弯曲,我们可以稍后纠正它。

选择木板制作芯坯时,重要的是它们尽可能相似。宽阔的一面应该尽可能接近光滑。我们以后会让它们变得非常光滑,所以它们开始时越光滑,以后就会越少浪费。

将木板匹配到单独的芯坯中 #

Poplar boards that need to be matched up into stacks. Selecting boards with similar bend to become stacks. One stack of nine boards ready to go.

一旦你准备好了一套木板,就可以按照胶粘时的顺序和方向将它们放在工作台上。

我使用8个水管夹,每个都有12英寸宽 x 2英寸x 2英寸橡胶垫。当我夹住它时,我将在芯坯的每一侧交替使用它们,所以我从工作台上的一半夹子开始间隔开,以确保另一半不会与它们重叠。我将牛皮纸放在夹子下面以保护工作台免受滴胶的影响。

在板上喷上干净的水,可以增加一些水分,这有助于胶水的正常固化。

准备好粘合的芯坯 #

Nine boards ready for stack layup, spread out to allow a bit of water to help with the glue cure later. Spraying water on the boards to help the glue cure later.

我使用聚氨酯胶来粘合我的芯坯,因为它有相当长的操作时间。实际得到一个芯坯需要大约15分钟。从我取下胶水瓶盖,在第一块板的整个长度上倒上第一滴胶水开始。然后,我用塑料吊具涂抹它,就像我在铺设时涂抹环氧树脂一样。(我在这里使用旧的底板作为吊具。)

需要一些练习才能开始熟悉在一次通过中应该用多少胶水。从太少开始并添加更多,但不要花费太多时间,因为还有七块板要这样做。取下一块板,将其​​放置在第一块板的顶部,然后冲洗并重复。一旦最终的板子到位,你就会有一个可以夹紧的粘性芯坯。

将胶水涂在芯坯上 #

Pouring glue during stack layup. Spreading glue with a bit of scrap base material as a spreader. Adding the second board to the stack. Adding the third board to a stack. Adding the final board to the stack.

小心地将芯坯放在上面,使其平放在底部夹具上。根据需要调整板的位置。请注意,芯坯的末端不必完全齐平!有一些长度略有不同的板很常见,这是正常的;我们稍后会修剪它。

放下芯坯并进行夹紧 #

Laying a stack down before clamping. Laying a stack down before clamping. Laying a stack down before clamping.

将板对齐后,拧紧底部的中心夹。然后,在两侧添加顶部夹具并将其拧紧。拧紧两侧的两个底部夹具。以相同的方式重复,直到达到目的。尽量避免在顶部上留下任何胶水。你不希望将夹具粘在芯坯上。你也可以通过在胶带上放置胶带来采取预防措施。

夹紧芯坯 #

Clamping a stack together. Stack clamped and drying.

我经常让一块芯坯干燥三到四个小时。我每天可以堆好几块芯坯。

木工资源页面上有许多关于正确夹紧的文章。这些都值得一读,它将帮助你了解应该使用多少压力才能获得良好的粘合。

准备芯坯以进行切片 #

一旦芯坯干燥并从夹具中取出,就需要准备切片了。第一步是去除在铺设和夹紧过程中挤出的所有多余的胶水。这很容易做到,因为聚氨酯胶不是真正的结构。一个 手刮板简化了它。你不需要将所有这些都移除,只需要防止芯坯在每侧平放的任何胶水。

刮去多余的胶水 #

A stack fresh out of the clamps with lots of excess glue squeezed out. A stack with excess glue scraped off.

芯坯的宽边将是不均匀的,因为几乎不可能找到完全笔直的板并将它们完美地对准以便夹紧。我选择看起来最平坦的一面,然后在8英寸的台刨运行,直到它变平。我将台刨设置为每次传球大约1/16英寸。你想要从现在开始移除最少量的木材。预先连接在一侧的铅笔标记使得易于看到哪些部分是光滑的以及需要更多工作的部分。

第一面被联合起来 #

A stack on the jointer, first side being process is down on the bed. Light passes make the side flat and remove the least material possible. A stack on the jointer, first side being process is down on the bed. Light passes make the side flat and remove the least material possible. A stack on the jointer, first side being process is down on the bed. Light passes make the side flat and remove the least material possible.

一旦那个面是平的,我将芯坯翻转90度并使堆叠的底部变平。为此,我将新平面放在台刨的导轨上。现在我们有一个平坦的宽面,一个平坦的相邻底面,这两个表面彼此成90度。

第二侧垂直于第一侧接合 #

A stack on the jointer, second side being processed is down on the bed. The first side is flat against the fence, ensuring that the two sides will be perpendicular. A stack on the jointer, second side being processed is down on the bed. The first side is flat against the fence, ensuring that the two sides will be perpendicular.

接下来,我通过一个压刨运行芯坯,使粘合面朝下,使另一个宽面变平。这产生了具有两个良好侧面和一个良好基础的芯坯。此时浮出第四张脸是可选的,我通常会跳过它。然后,如果有必要的话,我把芯坯放到我的斜切锯上并切割破烂的两端。

第三面与第一面平行 #

A stack with two sides already processed on the jointer. The side that is up needs to be made flat and parallel to the other side using a planer. Pencil marks help us see how much work is left. A stack with two sides already processed on the jointer. The side that is up needs to be made flat and parallel to the other side using a planer. Pencil marks help us see how much work is left. A stack with two sides already processed on the jointer. The side that is up needs to be made flat and parallel to the other side using a planer. Pencil marks help us see how much work is left. A stack with two sides already processed on the jointer. The side that is up needs to be made flat and parallel to the other side using a planer. Pencil marks help us see how much work is left. A stack with two sides already processed on the jointer. The side that is up needs to be made flat and parallel to the other side using a planer. Pencil marks help us see how much work is left.

现在芯坯已准备好进行切片。

清理芯坯准备切片 #

A stack cleaned up with two wide sides flat and parallel, and one base side flat and perpendicular to the others. A stack cleaned up with two wide sides flat and parallel, and one base side flat and perpendicular to the others.

有时在木头(结等)或靠近芯坯末端的不平板上有瑕疵。这可能没问题,只要这些瑕疵超出你将构建的任何合理板芯的末端。芯坯通常比实际板芯长。

Blemishes on a stack that really don’t matter #

A blemish at the end of a stack may not matter if its beyond the end of any reasonable core you might build. A blemish at the end of a stack may not matter if its beyond the end of any reasonable core you might build.

参阅 #

Last modified Wednesday April 10, 2019, at 02:53:35 UTC
Translated by X z on Wednesday April 10, 2019, at 02:53:35 UTC

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