摘要:
A device for gripping and pulling a length of thermoplastic sheet (S) softened to be moldingly formed at the front and rear edges, which are otherwise inevitably made to be concave, so as to hold said edges substantially straight, the device comprising at least two pairs of lower and upper gripping members (20, 30) arranged to be vertically movable so as to grip the above front and rear edges, and two pairs of pull levers (23, 33) each cooperating with one of the pair of lower and upper gripping members (20, 30) so as to grip the front and rear edges in advance of the gripping by the gripping members and pull to straighten the concaved edges which are then gripped by the gripping members.
摘要:
Apparatus and process for trimming articles molded on a plastic sheet and successively fed from a forming machine. A carriage (10) receives the article ( b ) to be suckingly held thereunder and is moved in a trimming zone (II), where a pair of longitudinal cutter devices (20, 20′), each having a stationary blade (22′) and an angularly movable blade (24′) are horizontally moved together from respective retreated positions for longitudinal cutting. Then, a front transverse cutter device (30) having similar pair of blades is raised up from retreated position for transverse cutting and then a rear transverse cutter device (30′) is similarly operated.
摘要:
Apparatus for longitudinally and transversely trimming articles (C(I), C(II)) moldingly formed on plastic sheet (b) which is brought by means of a pair of clamp chains (10) between longitudinally movable pointed tip knives (51) and longitudinally extended holder members (61) as well as transversely movable pointed tip knives (31) and transversely extended holder member (41) respectively held in retracted position and then trimmed by moving said knives and holder members to forwarded position and by moving said knives. Said sheet (b) is formed in advance with transversely and longitudinally extended ridges (XR, YR) so that said moving knives cannot sever the sheet at said ridges, whereby trimmed articles fall down by gravity and waste portion kept in one piece is brought out by said clamp chains to be collected.
摘要:
Apparatus and process for trimming articles molded on a plastic sheet and successively fed from a forming machine. A carriage (10) receives the article ( b ) to be suckingly held thereunder and is moved in a trimming zone (II), where a pair of longitudinal cutter devices (20, 20′), each having a stationary blade (22′) and an angularly movable blade (24′) are horizontally moved together from respective retreated positions for longitudinal cutting. Then, a front transverse cutter device (30) having similar pair of blades is raised up from retreated position for transverse cutting and then a rear transverse cutter device (30′) is similarly operated.
摘要:
A device for centering plastic webs automatically fed thereon one by one so as to feed it to a pair of cramp chains to be correctly gripped thereby at the opposite side edges. This comprises a bed (10) consisting of a central frame (11) and longitidinal as well as transverse arms (12a, 12b; 13a, 13b) respectively extended in opposite directions from the central frame for supporting the web of varied size. A plurality of pairs of centering members (21a, 21b; 22a, 22b; 23a, 23b), each having an upwardly projected pin (24), are oppositely arranged and adapted to move toward and apart with each other so as to abut on the longitudinal and transverse side edges of web on the table with said pin for centering. It is preferable and sufficient to move said centering members by means of a belt and pulleys for treating a light web.
摘要:
A device for centering plastic webs automatically fed thereon one by one so as to feed it to a pair of cramp chains to be correctly gripped thereby at the opposite side edges. This comprises a bed (10) consisting of a central frame (11) and longitidinal as well as transverse arms (12a, 12b; 13a, 13b) respectively extended in opposite directions from the central frame for supporting the web of varied size. A plurality of pairs of centering members (21a, 21b; 22a, 22b; 23a, 23b), each having an upwardly projected pin (24), are oppositely arranged and adapted to move toward and apart with each other so as to abut on the longitudinal and transverse side edges of web on the table with said pin for centering. It is preferable and sufficient to move said centering members by means of a belt and pulleys for treating a light web.
摘要:
Plastic web to be fed into opposite dies for forming articles must be heated and softened by heater means in front of the forming machine, even if said machine is combined with an extruder supplying said plastic web. The invention provides a radiant heater adapted to be sensitively responsive to manual or automatic control so as to more suitably regulate a temperature of the plastic web in comparison with the conventional heater comprising quartz tubes each having a coiled nichrome wire. The heater of the invention comprises an extended thin nichrome electrical resistance heater element plate (30) arranged in a zig-zag on a support plate (11) and insulating plate (13).
摘要:
Plastic web to be fed into opposite dies for forming articles must be heated and softened by heater means in front of the forming machine, even if said machine is combined with an extruder supplying said plastic web. The invention provides a radiant heater adapted to be sensitively responsive to manual or automatic control so as to more suitably regulate a temperature of the plastic web in comparison with the conventional heater comprising quartz tubes each having a coiled nichrome wire. The heater of the invention comprises an extended thin nichrome electrical resistance heater element plate (30) arranged in a zig-zag on a support plate (11) and insulating plate (13).