Leather splitting machine - with fixed gp. and movable gp. and adjustments for cutting and grinding

The present Addition refers to the splitting machine in particular hides and skins, the nonwoven fabrics, rubbers, plastics plates or rollers, being the object of the French Patent, n^e 80.19375.

The object of the Addition is attached in particular to claims 1, 4 and 6 of the main Patent have notably defined the characteristics of the splitting machine according to which the support structure of the said machine is designed to separate the members of said machine into two individual sets, in other words:

a fixed assembly carrying the presentation devices (10), and positioning drive (5-7) products, devices placed on either side of the cutting line, which are adjustable and distinctly separately with respect to the cutting line formed by the cutting edge of the upper run of an endless blade (25) | a mobile set in the horizontal plane, with respect to the fixed assembly, comprising a bed (13) blade holder equipped with all the guide elements, positioning, drive, sharpening of the blade with a cutting edge formed at the intersection of two faces bevelled sharpened (39-40), has a fixed position in the horizontal plane, relative to the bench; the said mobile assembly being movable with respect to the fixed assembly of the structure to vary the distance between the yaws d ' drive which is the imaginary plane passing through the axes of cylinders driver element (5) and (7) supported by the fixed assembly, and the cutting edge of the blade positioned immovably in the horizontal plane with respect to the movable part. According to other features of the machine, the movable assembly is positioned relative to 1' fixed assembly by two operating devices (I7d -17g) of the screw type and worm wheel, one end of which is locked in place by supports (ld-lg) (18d *-18g) fixed to the frame and which are linked into synchronism by a connecting shaft (18) connected to an operating means (19-20) external to the machine. Also provided is a geared motor (33), causing synchronized operating three devices (30, 30d, 30g) linked together by a shaft (31) and the group (33) '' * ■ by a shaft (32), the movement of a thrust plate (29) equipped with pushers (28) blade heel made and attached accurately to be fully aligned.

According to the Addition, it is wanted first, continued into the objective lens according to the Patent for obtaining a fixed position very accurate cutting edge of the blade (25), solve the problem resulting from the endless cutting blades (25) have not always perfect operating characteristics with regard to their geometry. This may result in instability of the moving blade on the flywheels (23g and 23d) which carry the and 1' drive.

In order that the blade remains pressed against the keys (28), is carried out wherein adjusting the "biasing" flying to incline their axes in a very reduced, to secure the blade (25) pressed against the keys or pushers (28), and in particular against the pushers at the ends (28a and 28b). Cepeithnt , some $blade with imperfections with a faiblemenVconvexe , pushers are supported on the end (28a and 28b) leaving an arrow (F) in the middle portion of the length of the blade. The boom can reach 5 to 6/10ème of a millimetre. Therefore, there is no more contact between the heel (25a) of the blade and the pushers (28c) in particular are in the center portion of the length of the blade.

When engages the skins or other products in the slitting machine, it occurs against the cutting blade that passes said blade from the equilibrium position taken in the training phase of the blade before slitting, to a position where the heel of the blade comes into contact with the keys (28c). The cutting edge of the blade is moved relative to the plane passing through the axes of the cylinder and the feed roller elements. This movement is detrimental to the high precision and is searched for the machine.

According to the Addition, it is proposed a device for varying the alignment of the keys or push ' to take account of the detents of the blades,

-by giving support to the heel of the blade over the entire length, by eliminating the arrow center spacer.

To this end, and according to a first feature of 1' invention the central bearing device (30) which acts against the thrust plate (29), comprises operating means to deform by pushing it, the central part of the plate (29), so that the pushers or center keys (28c) are advanced to support the heel of said cutter by compensating for its deformation.

In Addition, is also desired hold ' account that in working slitting of the two skins (the skins being cut according to the line of the line of the back), consideration should be given their thickness is thin and their loose fibrous structure and on the blanks of the said half-skins, while their thickness is stronger and their firmer structure along the line of the back.

Therefore, it is found of interest and important, 1 for ' amélioratior refentes operations, to be able to adjust the mobile assembly mounted on the bench (13) and therefore the blade (25) in a "biased" positior , i.e. inclined with respect to the fixed assembly mounted on the boxes (lg-ld) which include the feed-roll and the cylinder elements between which pass the half-skins. The inclination of the movable assembly is provided in one direction or the other according to whether it is of the strips or half-skins left (sidewall portion skins that is located to the left when in front of the machine, to feed hides), or strips or half-skins straight (sidewall portion of the skins to the right when in front of the machine, the skins pourintroduire).

For this purpose and according to a further feature of the invention, :

supports (18d -18g) which are fixed to the frame and which peuvenl (ld-lg) be actuated to position the mobile assembly with respect to:

fixed assembly, are equipped both adjustment means to act independently on one or the other of the device! operating (17g -17d), with respect to the fixed bearing (or 18d 18g) corresponding, angularly to incline the bench (13) and the blade (25) according to the half-skins slitting. Therefore, is reduced in a portion of the length the gap between the cutting edge of the blade (25) and the drive plane between the feed-roll element and correlated with the reduced thickness of the blank;

half-skins, while keeping on the other part of the 1 interval length necessary with respect to thicker portions (the back).

These and other features shall become apparent from the further description that follows.

For attachment of the invention but not limit, in the appended drawings.

Figure 1 is a schematic of 1' moving assembly at the plane and cutting, which is especially the boom (F) taken by the cutting blade.

Figure 2 is a cross-sectional view to larger scale with interruption in the length, showing the details of the adjustable mounting of the movable assembly according to Figure 1.

Figure 3 is a schematic view of the movable assembly in cutting devices viewed in the axis of the connecting and adjusting with respect to the fixed assembly. The broken one of the possible displacements of the said mobile assembly, corresponding to the "biasing".

Figure 4 is a partial cross-sectional view to larger scale and with interruption in the length, showing the details of the means for adjusting the biasing of the movable assembly.

Figure 5 is a perspective view illustrating two half-skins.

Afan to make more concrete the object of the invention, is now describes in a form not limited to embodiment shown to the figures of the drawings.

Referring figuresl and 2 to the moving assembly of the machine according to the Patent which mainly comprises a bank (13) connected to the braced frames (ld and lg) via supports (18d -18g).

A one end of the bench (13), is suspended a movable carriage (21) carrying a motor shaft (22d) with a flywheel (23d) which is driven by an electric motor (24).

Opposite, the bench (13) carrying a shaft (22g) (23g) with a steering wheel and an endless blade (25) is mounted in tension over the flywheels

The heel (25a) of the blade is supported on a series of keys or pushers (28) linked to a push plate (29) which is moved in translation by three devices (30), (30d) and (30g) of the bolt type worm wheel with nut and screw.

These three devices in synchronism are bonded to each other by

a transmission shaft (31) and being operated outside the machine by a shaft (32) driven in rotation by a geared motor (33).

The lateral devices (30d), (30g) have a feed screw (67d, 67g) mounted fixedly with respect to said devices, while the screw central control (67c) is adjustably mounted relative to the device (30), to deform by pushing the central part of the plate (29), to obtain a feed motion of keys or central pushers (28c), to compensate for the

deformation of the blade (25) there.

ramuree or can-To this end, the central screw (67c) has a, central portion/

groove or fluted...

elée does ' (67a) cooperating with a sleeve. / (30a) of the device (30) and the bearing point of the screw (67c) is conditué by a threaded sleeve (68) itself forming manoeuvring screw, in conjunction with a carrier to threaded bore (69) affixed to the bench (13) in the central axis.

The threaded insert (68) is provided with marks or graduations for judging the displacement achieved by its rotation and necessary to achieve contact of the pushers (28c) with the heel (25a) of the blade (25).

A fixing washer (70) connected to the support (69) is supported on a collar of the sleeve to avoid uncontrolled rotation and defocusing the threaded sleeve (68), and a ball stop (71) or the like, is interposed between the sleeve (68) and the screw (67c).

The bench (13) is positioned with respect to the frames (ld), (lg) by two operating devices (17d, 17g) of the screw type and worm wheel, with nuts and screw, related in synchronism by a connecting shaft (18), and controlled manually from 1' outside of the machine by a shaft (19) equipped with unx operating >-linking (20).

The screws (72) of operating devices (I7d, 17g) are connected to the supports (18d, 18g) integral with the supporting structures (ld, lg).

In order to accurately position the mobile assembly with rap port to the fixed assembly depending on the characteristics of the half-skins (PI-P2) presented, control is provided of the position by the screws (72) cooperating with nuts (76) devices 17d, 17g). L " upper end of said screw is connected, by ball thrust bearing (75) or equivalent, to threaded bushes (73) engaged in the threaded bore of the supports (18d, 18g). Graduated The flanges (74) made integral with the pins (73), are evenly ped actuation means, so that for rotation of the assembly sleeves flanges, the operating devices (17d, 17g) can be moved in a direction (Fl) or the other (F2) and independently, relative to the supports (18d, 18g).

This action reduces 1 'interval between 1' cutting edge of the blade (25) and the plane d between the cylinders • will result in driver-and elements, in a portion of the length corresponding with the reduced thickness of the half-skins flancstàes , while in the other part of the length is maintained in the interval nécessê re relative to the thicker portions of the half-skin (the back) •

The advantages emerge from the description, is highlighted the fixed position very accurate cutting edge of the blade in the horizontal plane with respect to the movable part, plating of the blade on all poüssoirs eliminating the central arrow and the deformations of the blade, and adjusting 1'-interval between the cutting edge and the drive plane depending on the characteristics of the half-skins.

The Additioh not limiting to that of methods of cation doctrine not only those embodiments of its various parts having been especially indicated; it embraces on the contrary all the variants.