摘要:
A forming section has a lower wire loop (11), which constitutes a single-wire section (T) following a breast roll (12). A first dewatering zone (Z1) has at least one stationary, first forming shoe (40) followed by a pulsating strip cover (50). The first forming shoe has leading and trailing edges and underpressure affecting through holes of the cover. The holes are openings or slots substantially in the longitudinal direction of the machine, whereby non-pulsating dewatering is applied on the stock travelling on top of the lower wire. A pulp suspension jet is fed from a headbox (30) at an impact point after the shoe leading edge. The cover is straight at least in the area between the impact point of the pulp suspension jet and the trailing edge. The impact of the pulp suspension jet on the forming wire is thus better controlled in a better way, increasing production speed.
摘要:
A forming section has a lower wire loop (11), which constitutes a single-wire section (T) following a breast roll (12). A first dewatering zone (Z1) has at least one stationary, first forming shoe (40) followed by a pulsating strip cover (50). The first forming shoe has leading and trailing edges and underpressure affecting through holes of the cover. The holes are openings or slots substantially in the longitudinal direction of the machine, whereby non-pulsating dewatering is applied on the stock travelling on top of the lower wire. A pulp suspension jet is fed from a headbox (30) at an impact point after the shoe leading edge. The cover is straight at least in the area between the impact point of the pulp suspension jet and the trailing edge. The impact of the pulp suspension jet on the forming wire is thus better controlled in a better way, increasing production speed.
摘要:
A vane intended for a headbox of a paper machine or equivalent is moistened and enclosed in a vapor-proof package to ensure the straightness of the vane. At least a portion of the vane is made of a water-absorbing material, such as plastic or a composite. Advantageously, the vane contains moisture in an amount that corresponds to the equilibrium moisture content of the vane in headbox conditions. It is enclosed in a package, preferably a vacuum package, which retains the moisture of the vane until the vane is put into use.
摘要:
A headbox apparatus of a paper machine or equivalent has a body (11). Dilution water (arrow L2) is conducted through at least two rows of ducts (12a1, 12a2 . . . ) into each body mixing chambers (13a1, 13a2 . . . ). Each mixing chamber (13a1, 13a2 . . . ) is limited by vertical walls (T1), a bottom wall (T2) and a covering wall (T3), and a partition wall (16a1, 16a2 . . . ). The ducts (14a1.1, 14a1.2 . . . ) on the inlet side of the mixing chamber extend into the mixing chamber (13a1, 13a2 . . . ) at a distance (h1) from the ducts (15a1.1, 15a1.2 . . . , 15a2.2 . . . ) on the outlet side of the mixing chamber (13a1, 13a2 . . . ), whereby an annular gap (D1) is left between the aligned duct (14a1.1, 14a1.2 . . . 14a2.1, 14a2.2 . . . ) on the inlet side and the duct (15a1.1, 15a1.2 . . . , 15a2.1, 15a2.2 . . . ) on the outlet side. Each mixing chamber (13a1, 13a2 . . . ) is filled by dilution water which is conducted through the annular gap (D1) to join the stock (m1).
摘要:
A vane intended for a headbox of a paper machine or equivalent is moistened and enclosed in a vapor-proof package to ensure the straightness of the vane. At least a portion of the vane is made of a water-absorbing material, such as plastic or a composite. Advantageously, the vane contains moisture in an amount that corresponds to the equilibrium moisture content of the vane in headbox conditions. It is enclosed in a package, preferably a vacuum package, which retains the moisture of the vane until the vane is put into use.
摘要:
A paper machine headbox vane has a vane component (2) and a pivot member (3) connected together with anchoring elements (4), which pass through holes (5, 6a, 6b) provided in both components (2, 3). The vane (1) is fastened to a headbox engagement groove in the headbox by the pivot member (3) which has two or more pivot member elements (3a1, 3a2, 3a3) which have positioning holes for positioning the vane component (2) and the pivot member elements (3a1, 3a2, 3a3) in relation to each other. A least one longitudinal hole in each element allows its free linear movement in relation to the vane component (2). The vane component (2) has a longitudinal opening (7), which receives the pivot member (3) with an opening between two successive pivot member elements (3a1, 3a2, 3a3). The vane component (2) and the pivot member elements (3a1, 3a2, 3a3) can be of different materials.
摘要翻译:造纸机流浆箱叶片具有叶片部件(2)和与锚定元件(4)连接在一起的枢转构件(3),锚定元件(4)穿过设置在两个部件(2,3)中的孔(5,6a,6b) 。 叶片(1)通过枢转构件(3)固定在流浆箱中的流浆箱接合槽,该枢转构件(3)具有两个或更多个枢转构件元件(3,3a,3a, 其具有用于定位叶片部件(2)和枢转构件元件(3a)的定位孔,3,3a,3 < / SUB>,3 a 3 <3>)。 每个元件中的至少一个纵向孔允许其相对于叶片部件(2)的自由线性移动。 所述叶片部件(2)具有纵向开口(7),所述纵向开口(7)容纳所述枢转构件(3),所述枢转构件(3)在两个连续的枢转构件元件(3a,3a, / SUB>,3 a 3 3)。 叶片部件(2)和枢转构件元件(3aa,3aa,3aa,3ba,3aa)可以是不同的材料 。
摘要:
A headbox apparatus of a paper machine or equivalent has a body (11). Dilution water (arrow L2) is conducted through at least two rows of ducts (12a1, 12a2 . . . ) into each body mixing chambers (13a1, 13a2 . . . ). Each mixing chamber (13a1, 13a2 . . . ) is limited by vertical walls (T1), a bottom wall (T2) and a covering wall (T3), and a partition wall (16a1, 16a2 . . . ). The ducts (14a1.1, 14a1.2 . . . ) on the inlet side of the mixing chamber extend into the mixing chamber (13a1, 13a2 . . . ) at a distance (h1) from the ducts (15a1.1, 15a1.2 . . . , 15a2.1, 15a2.2 . . . ) on the outlet side of the mixing chamber (13a1, 13a2 . . . ), whereby an annular gap (D1) is left between the aligned duct (14a1.1, 14a1.2 . . . 14a2.1, 14a2.2 . . . ) on the inlet side and the duct (15a1.1, 15a1.2 . . . , 15a2.1, 15a2.2 . . . ) on the outlet side. Each mixing chamber (13a1, 13a2 . . . ) is filled by dilution water which is conducted through the annular gap (D1) to join the stock (m1).