Rod-shaped material slitting device and working method

Abstract

The invention relates to a bar-shaped material slitting device and a working method, the bar-shaped material slitting device comprises a slitting sheave, one side of the slitting sheave is provided with at least two slitting knives installed on a knife box, the slitting sheave is provided with a plurality of gear teeth in the circumferential direction to form a plurality of tooth grooves, and the slitting sheave is provided with a plurality of slits corresponding to blades of the slitting knives in the axis direction; a guide mechanism is arranged between the slitting knife and the slitting grooved wheel, the guide mechanism comprises an outer side guide plate and an inner side guide plate, a connecting shaft is arranged between the outer side guide plate and the inner side guide plate to connect the outer side guide plate and the inner side guide plate into a whole, and the outer side guide plate is fixed with the knife box; the opposite inner side faces of the outer side guide plate and the inner side guide plate are elastically connected with movable barrier strips used for making contact with the end faces of the rod-shaped materials, the movable barrier strip of the outer side guide plate is divided into multiple sections, and the slitting device is high in slitting quality.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette production equipment, and in particular to a rod-shaped material cutting device and a working method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the process of making new tobacco cigarettes, it is necessary to provide online cut rod-shaped materials, such as acetate filter rods, plastic fastener rods, multifunctional composite filter rods, etc. Traditional cigarette making equipment mostly uses two-equal cutting and three-equal cutting when cutting base rods, and then arranges and transports the cut rod segments through the offset wheel and the merging wheel. There are many structural parts, large space is occupied, the action control process is relatively complex, and the single cutting efficiency is low.

[0004] At present, the granule filling machine adopts two-component cutters to realize the ten-equal cutting of a single base rod, which improves the cutting efficiency. When cutting rod-shaped materials with higher rigidity, such as plastic fastener rods, the plastic fastener rods will not produce elastic deformation in the axial direction. There are more blades for single cutting, and the thickness of each cutting blade is 0.3mm. After cutting by the first group of blades, there are gaps in the rod segments formed by the cutting of the single base rod due to the thickness of the blades. This part of the rod segment will not produce axial displacement. When the rod segment enters the second group of cutters for cutting, the above gap will affect the secondary cutting length of the rod segment, thereby reducing the online cutting quality of the cost rod segment.

[0005] The positioning of rod-like materials in the slitting process is mostly achieved by adding negative pressure holes for adsorption in the teeth of the slitting groove wheel. In the actual production process, in order to facilitate the rod-like materials to fall into the slitting groove wheel quickly, the diameter of the holes in the teeth of the slitting groove wheel is generally larger than the diameter of the rod-like materials. When the rod-like materials enter the teeth of the slitting groove wheel under the action of negative pressure suction, they enter the slitting knife with the slitting groove wheel for slitting. At this time, the negative pressure in the teeth of the slitting groove wheel cannot overcome the friction generated by the slitting blade in the process of slitting the rod-like materials, resulting in positional displacement of the rod-like materials in the teeth of the slitting groove wheel. The axial direction of the rod-like materials cannot be guaranteed to be parallel to the axial direction of the teeth of the slitting groove wheel, and the inclined state causes the cross-section of the cut of the rod segment after slitting to be skewed, affecting the appearance quality of the rod segment after slitting. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device for cutting rod-shaped materials. When a single rod-shaped material enters the cutting knife position as the cutting groove wheel rotates, it can be automatically centered, and the influence of the gaps between the rod segments caused by the thickness of multiple cutting blades on the cutting of the base rod can be automatically eliminated or reduced, thereby realizing several equal cuts of the single rod-shaped material. After the rod-shaped material is cut, the rod segments are fixed in the teeth of the cutting groove wheel without displacement under the guidance of several retaining strips nested with the cutting groove wheel, thereby avoiding the occurrence of problems such as skewness of the cut end face.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0008] In the first aspect, an embodiment of the present invention provides a rod-shaped material slitting device, comprising a slitting groove wheel, one side of the slitting groove wheel is provided with at least two slitting knife groups installed in a knife box, a plurality of gear teeth are provided on the slitting groove wheel along the circumferential direction to form a plurality of tooth grooves, a plurality of cutting slits corresponding to the blades of the slitting knife group are provided along the axial direction, a guide mechanism is provided between the slitting knife group and the slitting groove wheel, the guide mechanism comprises an outer guide plate and an inner guide plate, a connecting shaft is provided between the outer guide plate and the inner guide plate to connect them into a whole, the outer guide plate is fixed to the knife box, the inner side surfaces relative to the outer guide plate and the inner guide plate are elastically connected with movable baffles for contacting the end faces of the rod-shaped materials, and the movable baffles of the outer guide plate are divided into multiple sections.

[0009] Optionally, along the rotation direction of the slitting groove wheel, one side of the slitting groove wheel is provided with a first slitting knife group and a second slitting knife group located downstream of the first slitting knife group, the movable baffle connected to the outer guide plate is divided into two sections, namely an upper movable baffle and a lower movable baffle, the top and bottom ends of the upper movable baffle and the lower movable baffle are elastically connected to the outer guide plate, the cutting position of the first slitting knife group is set close to the top end of the upper movable baffle, and the cutting position of the second slitting knife group is set close to the bottom end of the lower movable baffle.

[0010] Optionally, a plurality of limit stop bars are provided between the outer guide plate and the inner guide plate, the ends of the limit stop bars are connected to the connecting shaft, the inner ring portion of the limit stop bars is embedded in the groove on the gear teeth of the cutting groove wheel, and the groove is opened on the side of the cutting seam.

[0011] Optionally, a distance sleeve sleeved on the connecting shaft is provided between the ends of adjacent limit stop bars on the same side to locate the position of the limit stop bars.

[0012] Optionally, a first connecting column is provided at the end of each section of the movable baffle connected to the outer guide plate, and the first connecting column passes through the outer guide plate through a stepped hole provided in the outer guide plate, and an elastic member is provided between the stepped surface of the stepped hole and the movable baffle.

[0013] Optionally, a portion of the first connecting column that extends to the outside of the outer guide plate is threadedly fixed with a first limiting component.

[0014] Optionally, a second connecting column is provided at the end of the movable baffle connected to the inner guide plate, and the second connecting column passes through the inner guide plate through a stepped hole provided in the inner guide plate, and an elastic member is provided between the stepped surface of the stepped hole and the movable baffle;

[0015] Optionally, a portion of the second connecting column extending to the outside of the inner guide plate is threadedly fixed with a second limiting component.

[0016] Optionally, a silo is provided above the slitting groove wheel, and the slitting groove wheel is located at the discharge port at the bottom end of the silo.

[0017] In a second aspect, an embodiment of the present invention provides a working method of a rod-shaped material slitting device, wherein a slitting groove wheel with a rod-shaped material placed in a tooth groove rotates, driving the rod-shaped material to rotate, and when the rod-shaped material rotates to a corresponding position of a slitting knife group, the slitting knife slitting the rod-shaped material, and the rod-shaped material rotates through multiple slitting knife groups, thereby realizing multiple slitting of the rod-shaped material;

[0018] Among them, after completing one slitting, before the rod-shaped material enters the next slitting knife group, the outer guide plate and the inner guide plate drive the moving baffle to act on the rod-shaped material through elastic force, eliminating the gap between multiple rod-shaped material segments after slitting, and then the next slitting is carried out.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The rod-shaped material slitting device and working method of the present invention are provided with a guide mechanism between the slitting knife group and the slitting groove wheel, the guide mechanism includes an outer guide plate and an inner guide plate, and the outer guide plate and the inner guide plate are elastically connected to the opposite sides thereof with movable baffles. When the slitting knife group cuts the rod-shaped material, the overall length of the rod-shaped material increases due to the cutting of the blade, and the movable baffles on both sides of the rod-shaped material overcome the elastic force and move away. When the blade leaves the rod-shaped material, the movable baffles eliminate the gap between each rod-shaped material segment after one slitting under the action of the elastic force, and tighten each rod-shaped material segment, so as to realize automatic centering of each rod-shaped material segment after slitting, automatically eliminate or reduce the gap caused by the thickness of the blade, and improve the length accuracy of the rod segment after slitting.

[0021] 2. The rod-shaped material slitting device and working method of the present invention are provided with a limit stop bar, which can block the open end of the groove between adjacent cutting seams. When the rod-shaped material passes through the slitting knife group, it contacts the limit stop bar and is limited by the limit stop bar, thereby preventing the rod-shaped material from being displaced when passing through the slitting knife group in the slitting groove wheel, avoiding the end face of the rod segment from being skewed after slitting, and thereby improving the appearance quality of online slitting.

[0022] 3. In the rod-shaped material cutting device and working method of the present invention, the first connecting column is threadedly connected with a first limiting component, and the second connecting column is threadedly connected with a second limiting component. The initial position of the movable baffle can be adjusted by adjusting the first limiting component and the second limiting component to meet the cutting requirements of rod-shaped materials of different lengths and improve the applicability of the equipment to online cutting of rod-shaped materials of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a slitting groove wheel according to Embodiment 1 of the present invention;

[0026] Figure 3 is a schematic diagram of the structure of the guide mechanism of Example 1 of the present invention;

[0027] Figure 4 It is a schematic diagram of the assembly of the outer guide plate, the upper moving baffle bar and the lower moving baffle bar in Example 1 of the present invention;

[0028] Figure 5 This is a schematic diagram of the assembly of the inner guide plate and the inner movable baffle bar of Example 1 of the present invention;

[0029] Figure 6 is a cross-sectional view of the assembly of the outer guide plate and the upper movable baffle bar of Example 1 of the present invention;

[0030] Figure 7 Schematic diagram of the cooperation between the limit stop bar and the slitting groove wheel in embodiment 1 of the present invention;

[0031] Among them, 1. guide mechanism, 2. material bin, 3. slitting groove wheel, 4. first slitting knife group, 5. outer panel, 6. second slitting knife group;

[0032] 101. outer guide plate, 102. inner guide plate, 103. connecting shaft, 104. distance sleeve, 105. limit stop bar, 106. first locking nut, 107. upper moving stop bar, 108. lower moving stop bar, 109. inner moving stop bar, 110. spring, 111. first connecting column;

[0033] 301. Tooth groove, 302. Negative pressure adsorption hole, 303. Slit, 304. Groove. DETAILED DESCRIPTION

[0034] Example 1

[0035] This embodiment provides a rod-shaped material cutting device, such as Figure 1 As shown, it includes a silo 2, in which a plurality of rod-shaped materials to be cut are placed, a cutting groove wheel 3 is provided at the bottom discharge port of the silo 2, and at least two cutting knife groups are provided on one side of the cutting groove wheel 3. In this embodiment, as Figure 2As shown, the slitting groove wheel 3 can use existing equipment, and its outer ring surface is provided with a plurality of gear teeth along the circumferential direction, and tooth grooves 301 are formed between adjacent gear teeth. The tooth grooves 301 are arranged along the axial direction of the slitting groove wheel 3, and the diameter of the tooth grooves 301 is larger than the diameter of the rod-shaped material, and a negative pressure adsorption hole 302 is provided at the bottom of the tooth grooves.

[0036] The slitting groove wheel 3 is also provided with a plurality of slits 303 . Preferably, nine slits 303 are provided on the slitting groove wheel 3 . The slits 303 correspond to the cutting positions of the rod-shaped materials. The slits 303 are annular slits. The plurality of slits 303 are distributed along the axial direction of the slitting groove wheel 3 .

[0037] Two slitting knife groups are provided on one side of the slitting groove wheel 3, namely the first slitting knife group 4 and the second slitting knife group 6. Along the rotation direction of the slitting groove wheel 3, the second slitting knife group 6 is located downstream of the first slitting knife group 4. The two slitting knives are distributed along the rotation trajectory of the slitting groove wheel 3, and are used to slitting the rod-shaped materials in the tooth groove 301 in sequence. The slitting knife includes a knife shaft, which is connected to the outer panel 5 of the knife box. A plurality of blades are arranged on the knife shaft. Preferably, the thickness of the blade is 0.3 mm, and the position of the blade corresponds to the position of the slit 303. The blades of the two slitting knives are staggered so that the first slitting knife group 4 and the second slitting knife group 6 can slitting the rod-shaped materials in sequence.

[0038] The slitting groove wheel 3 and the slitting knife group are both connected to corresponding power mechanisms to drive them to rotate around their own axes.

[0039] The above structure can adopt the structure of the existing rod-shaped material slitting equipment, and its further technical details are not described in detail here. In this embodiment, an improvement is made on the basis of the existing rod-shaped material slitting equipment, and a guide mechanism 1 is added between the slitting knife and the slitting groove wheel. The guide mechanism 1 is fixedly mounted on the outer panel 5 of the knife box.

[0040] like Figure 3-Figure 5As shown, the guide mechanism includes an outer guide plate 101 and an inner guide plate 103 that are arranged opposite to each other, a connecting shaft 103 is provided between the top ends of the outer guide plate 101 and the inner guide plate 103, and a connecting shaft 103 is provided between the bottom ends, the connecting shaft 103 connects the outer guide plate 101 and the inner guide plate 103 into a whole, the side faces of the outer guide plate 101 and the inner guide plate 103 facing each other are the inner sides, the inner sides of the outer guide plate 101 and the inner guide plate 103 are elastically connected with movable baffles, the movable baffles are located on both sides of the cutting groove wheel 3, the movable baffles on both sides are respectively used to contact with the two end faces of the rod-shaped material, wherein the movable baffle of the outer guide plate 101 is divided into multiple sections, each section is elastically connected to the outer guide plate 101, in this embodiment, the movable baffle connected to the outer guide plate 101 is divided into two sections, namely an upper movable baffle 107 and a lower movable baffle 108. The two ends of the upper movable blocking bar 107 are elastically connected to the outer guide plate 101 , and the two ends of the lower movable blocking bar 108 are elastically connected to the outer guide plate 101 .

[0041] A plurality of limit baffles 105 are also provided between the outer guide plate 101 and the inner guide plate 103. The limit baffles 105 correspond to the positions on the sides of the slits 303, and the inner ring portions thereof are embedded in the grooves 304 provided on the sides of the slits 303 in the gear teeth. In the slitting groove wheel 3, the outer ends of the gear teeth between each two adjacent slits 303 are milled with grooves 304 which are lower than the outer diameter of the slitting groove wheel and are about 5 mm wide. The height between the bottom groove surface of the groove 304 and the lowest point of the tooth groove 301 of the slitting groove wheel 3 is not greater than the diameter of the rod-shaped material.

[0042] Since the rod-shaped material is cut into ten sections, ten limit bars 105 are provided, and the limit bars 105 correspond to the positions between adjacent slits 303 .

[0043] Specifically, the outer guide plate 101 and the inner guide plate 102 both adopt arc-shaped strips that match the shape of the cutting groove wheel, and have fixed blocks at both ends, the fixed block at the upper end is the upper fixed block, and the fixed block at the lower end is the lower fixed block, the outer guide plate and the inner guide plate are arranged relatively parallel, and an upper connecting shaft is provided between the fixed blocks at the top of the outer guide plate 101 and the inner guide plate 102, one end of the upper connecting shaft is fixed to the upper fixed block of the outer guide plate 101, and the other end is fixed to the upper fixed block of the inner guide plate 102, and a lower connecting shaft is provided between the fixed blocks at the bottom ends of the outer guide plate 101 and the inner guide plate 102, one end of the lower connecting shaft is fixed to the lower fixed block of the outer guide plate 101, and the other end is fixed to the lower fixed block at the bottom end of the inner guide plate 102.

[0044] The outer guide plate 101 and the inner guide plate 102 are connected into a whole through the upper connecting shaft and the lower connecting shaft.

[0045] A fixing block is also provided in the middle of the outer guide plate 101, which is a middle fixing block. The middle fixing block is embedded in the groove set in the outer panel 5 of the tool box. The outer guide plate 101 is provided with fixing holes at positions on both sides of the middle fixing block, and is fixedly connected to the outer panel 5 of the tool box through the fixing holes and fixing bolts.

[0046] The inner side surfaces of the outer guide plate 101 and the inner guide plate 102 that are opposite to each other are elastically connected with movable baffles, and the movable baffles are arc-shaped baffles that match the outer guide plate and the inner guide plate.

[0047] For the movable baffle of the outer guide plate, the outer movable baffle is divided into segments, namely an upper movable baffle 107 and a lower movable baffle 108. The upper movable baffle 107 corresponds to the first slitting knife group 4, and the cutting position of the first slitting knife group 4 is close to the top of the upper movable baffle 107. The lower movable baffle 108 corresponds to the second slitting knife group 6, and the cutting position of the second slitting knife group 6 is close to the bottom of the lower movable baffle 108.

[0048] like Figure 6 As shown, the top and bottom ends of the upper movable baffle 107 are both provided with a first connecting column 111, and the first connecting column 111 at the top passes through the upper fixed block through a stepped hole provided in the upper fixed block, the diameter of the smaller diameter portion of the stepped hole is larger than the diameter of the first connecting column 111, and an elastic member is provided between the upper movable baffle 107 and the stepped surface of the stepped hole. Preferably, the elastic member is a spring 110, and the spring 110 is sleeved on the outer periphery of the first connecting column 111, and one end of the spring 110 is connected to the upper movable baffle 107, and the other end is connected to the step surface.

[0049] The first connecting column 111 at the bottom end of the upper movable baffle 107 passes through the middle fixed block through the stepped hole set in the middle fixed block, and an elastic member is provided between the upper movable baffle and the stepped surface of the stepped hole, and the diameter of the smaller diameter part of the stepped hole is larger than the diameter of the first connecting column. Preferably, the elastic member is a spring 110, and the spring 110 is sleeved on the outer periphery of the first connecting column 111, one end of the spring 110 is connected to the inner side surface of the upper movable baffle 107, and the other end is connected to the step surface.

[0050] The connection method of the lower moving baffle 108 is the same as that of the upper moving baffle 107. The first connecting column 111 at the top of the lower moving baffle 108 passes through the middle fixed block through the stepped hole, and the first connecting column 111 at the bottom of the lower moving baffle passes through the lower fixed block through the stepped hole. A spring 110 is provided between the stepped surface of the stepped hole and the lower moving baffle 108 and is sleeved on the outer periphery of the first connecting column.

[0051] Furthermore, the column section of the first connecting column 111 extending to the outside of the outer guide plate 101 is provided with an external thread structure and is threadedly connected to a first limiting component. Preferably, the first limiting component adopts a first limiting nut 106. The first limiting nut 106 can contact the outer guide plate 101, and can limit the movement distance of the upper moving baffle 107 and the lower moving baffle 108 toward the inner direction under the elastic force of the spring 110, thereby adjusting the initial position of the upper moving baffle 107 and the lower moving baffle 108.

[0052] The inner movable baffle 109 elastically connected to the inner surface of the inner guide plate 102 is a whole arc-shaped movable baffle, and the upper and lower ends of the inner movable baffle are provided with second connecting columns, the second connecting column at the upper end passes through the upper fixed block through the stepped hole provided in the fixed block on the inner guide plate, and a spring sleeved on the outer periphery of the second connecting column is provided between the inner guide plate and the stepped surface of the stepped hole, the second connecting column at the lower end passes through the lower fixed block through the stepped hole provided in the lower fixed block of the inner guide plate, and a spring sleeved on the outer periphery of the second connecting column is provided between the inner guide plate and the stepped surface of the stepped hole.

[0053] The column section of the second connecting column that passes through to the outside of the inner guide plate is provided with an external thread structure and is threadedly connected to a second limiting member. Preferably, the second limiting member is a second limiting nut, and the second limiting nut contacts the outer side surface of the inner guide plate.

[0054] The first limiting nut and the second limiting nut can be used to adjust the initial positions of the movable baffles of the inner guide plate 102 and the outer guide plate 101 to meet the slitting requirements of rod-shaped materials of different lengths and improve the applicability of the equipment to online slitting of rod-shaped materials of various specifications.

[0055] Preferably, the upper end of the inner side surface of the upper moving baffle 107, the lower end of the inner side surface of the lower moving baffle 108, and the two ends of the inner side surface of the inner moving baffle 109 connected to the inner guide plate 102 are all provided with inclined surfaces, and along the direction from the inner end to the outer end of the moving baffle, the inclined surface is inclined in the direction away from the inner side surface of the moving baffle, and at the same time, the top of the inner end surface of the lower moving baffle 108 is provided with an arc chamfer. With this arrangement, during the rotation of the rod-shaped material, the guiding effect of the inclined surface facilitates the rod-shaped material to overcome the elastic force of the spring and enter between the moving baffles on both sides.

[0056] like Figure 7As shown, a plurality of limit stop bars 105 are arranged between the outer movable plate 101 and the inner movable plate 102. The limit stop bars 105 are arc-shaped bars that match the slitting groove wheel 3. Connecting plates are arranged at the two ends of the limit stop bars 105. The upper connecting plate is connected to the upper connecting shaft, and the lower connecting plate is connected to the lower connecting shaft. The inner ring portion of the limit stop bar 105 is embedded in the groove 304 arranged on the outer end surface of the gear teeth of the slitting groove wheel 3. Since the bottom groove surface of the groove 304 is not at the same height as the lowest part of the tooth groove of the slitting groove wheel, the inner ring portion of the limit stop bar 105 is embedded in the groove 304 arranged on the outer end surface of the gear teeth of the slitting groove wheel 3. The limit stop bar 105 is larger than the diameter of the rod-shaped material. Therefore, the height between the inner annular surface of the limit stop bar 105 and the lowest point of the tooth groove 301 of the slitting groove wheel 3 is not larger than the diameter of the rod-shaped material. The limit stop bar 105 can block the open end of the groove between adjacent cutting seams. When the rod-shaped material passes through the slitting knife, it contacts the inner annular surface of the limit stop bar 105 and is limited by the limit stop bar 105, thereby preventing the rod-shaped material from being displaced when passing through the slitting knife in the slitting groove wheel, avoiding the occurrence of skewness of the end face of the rod segment after slitting, and thereby improving the appearance quality of online slitting.

[0057] Furthermore, on the upper connecting shaft and the lower connecting shaft, a distance sleeve 104 is provided between the connecting plates located at the ends of adjacent limit stop bars. The distance sleeve 104 of the upper connecting shaft is sleeved on the outer periphery of the upper connecting shaft, and the distance sleeve 104 of the lower connecting shaft is sleeved on the outer periphery of the lower connecting shaft. The position of the limit stop bar 105 is positioned by the distance sleeve 104.

[0058] The remaining structures of the slitting device can adopt the existing technology and will not be described in detail here.

[0059] Example 2

[0060] The present embodiment provides a working method of the rod-shaped material cutting device described in Embodiment 1: the rod-shaped material in the silo falls into the tooth grooves of the cutting groove wheel, and is sucked into the tooth grooves 301 by the multiple negative pressure adsorption holes 302 provided in the tooth grooves 301 of the cutting groove wheel 3. The cutting groove wheel 3 rotates around its own axis to drive the rod-shaped material to move. When the rod-shaped material passes through the first cutting knife 4, the first cutting knife group 4 cuts the rod-shaped material into five sections through the blade. When passing through the second cutting knife group 6, the second cutting knife group 6 cuts the rod-shaped material again and cuts the rod-shaped material into ten sections.

[0061] During the movement of the rod-shaped material along the slitting groove wheel, when the rod-shaped material enters the coverage range of the limit stop bar 105, multiple limit stop bars 105 are nested and matched with the grooves 304 provided on the outer end faces of the teeth of the slitting groove wheel 3. The limit stop bars 105 limit and guide the rod-shaped material in the tooth grooves of the slitting groove wheel 3, preventing the position of the rod-shaped material in the tooth grooves of the slitting groove wheel 3 from being offset during slitting, avoiding the occurrence of skewness of the end faces of the rod segments after slitting, and thereby improving the appearance quality of online slitting.

[0062] The rod-shaped material is cut for the first time when it passes through the first slitting knife group 4 composed of a plurality of blades. The thickness of each slitting blade is 0.3 mm. When the rod-shaped material leaves the first slitting knife group 4 as the slitting groove wheel 3 rotates, there will be a 0.3 mm gap between each adjacent rod segment. When the plurality of slitting blades of the first slitting knife group 4 plus the length of the rod-shaped material increase in the axial direction, the top of the upper moving stop bar 107 and the inner moving stop bar 109 overcome the preload force of the spring and move to both sides in the direction away from each other. , always keep the two ends of the rod segment that has passed the first cut guided and tightened. When the cut rod segment continues to move, the bottom end of the upper movable baffle 107 applies a force toward the inside to the rod segment under the action of the spring, so that the gap between the rod segments is reduced or eliminated. When entering the second slitting knife group 6, under the action of the lower movable baffle 108 and the inner movable baffle 109 located on both sides of the cut rod segment, the rod material maintains the state after the gap is eliminated and enters the cutting position of the second slitting knife group 6, thereby realizing automatic centering of the cut rod segment.

[0063] By using the slitting device of this embodiment, the movable baffle eliminates the gaps between the rod-shaped material segments after one slitting under the action of elastic force, and tightens the rod-shaped material segments, thereby achieving automatic centering of the rod-shaped material segments after slitting, automatically eliminating or reducing the gaps caused by the thickness of the blade, and improving the length accuracy of the rod segments after slitting.

[0064] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rod-shaped material slitting device, comprising a slitting groove wheel, one side of which is provided with at least two slitting knives mounted in a knife box, a plurality of gear teeth are provided on the slitting groove wheel along the annular direction to form a plurality of tooth grooves, and a plurality of cutting slots corresponding to the slitting knife blades are provided along the axial direction, characterized in that: A guide mechanism is provided between the slitting knife and the slitting groove wheel, and the guide mechanism includes an outer guide plate and an inner guide plate. A connecting shaft is provided between the outer guide plate and the inner guide plate to connect them into a whole. The outer guide plate is fixed to the knife box, and the inner side surfaces relative to the outer guide plate and the inner guide plate are elastically connected with movable baffles for contacting the end surface of the rod-shaped material, and the movable baffles of the outer guide plate are divided into multiple sections.

2. A rod-shaped material cutting device as claimed in claim 1, characterized in that: Along the rotation direction of the slitting groove wheel, a first slitting knife group and a second slitting knife group located downstream of the first slitting knife group are provided on one side of the slitting groove wheel. The movable baffle connected to the outer guide plate is divided into two sections, namely an upper movable baffle and a lower movable baffle. The top and bottom ends of the upper movable baffle and the lower movable baffle are elastically connected to the outer guide plate. The cutting position of the first slitting knife group is set close to the top end of the upper movable baffle, and the cutting position of the second slitting knife group is set close to the bottom end of the lower movable baffle.

3. A rod-shaped material cutting device as claimed in claim 1, characterized in that: A plurality of limit stop bars are arranged between the outer guide plate and the inner guide plate, the ends of the limit stop bars are connected to the connecting shaft, the inner ring parts of the limit stop bars are embedded in the grooves on the teeth of the cutting groove wheel, and the grooves are arranged on the sides of the cutting seams.

4. A rod-shaped material cutting device as claimed in claim 3, characterized in that: A distance sleeve sleeved on the connecting shaft is arranged between the ends of the adjacent limit stop bars on the same side to locate the position of the limit stop bars.

5. A rod-shaped material cutting device as claimed in claim 1, characterized in that: A first connecting column is provided at the end of each section of the moving baffle connected to the outer guide plate. The first connecting column passes through the outer guide plate through a stepped hole provided in the outer guide plate, and an elastic member is provided between the stepped surface of the stepped hole and the moving baffle.

6. A rod-shaped material cutting device as claimed in claim 5, characterized in that: A first limiting component is threadedly fixed to a portion of the first connecting column that extends outward from the outer guide plate.

7. A rod-shaped material cutting device as claimed in claim 1, characterized in that: A second connecting column is provided at the end of the movable baffle connected to the inner guide plate. The second connecting column passes through the inner guide plate through a stepped hole provided in the inner guide plate, and an elastic member is provided between the stepped surface of the stepped hole and the movable baffle.

8. A rod-shaped material cutting device as claimed in claim 7, characterized in that: The portion of the second connecting column extending to the outside of the inner guide plate is threadedly fixed with a second limiting component.

9. A rod-shaped material cutting device as claimed in claim 1, characterized in that: A material bin is arranged above the slitting groove wheel, and the slitting groove wheel is located at the discharge port at the bottom end of the material bin.

10. A working method of a rod-shaped material cutting device, characterized in that: The cutting groove wheel with the rod-shaped material placed in the tooth groove rotates, driving the rod-shaped material to rotate. When the rod-shaped material rotates to the corresponding position of the cutting knife, the cutting knife cuts the rod-shaped material. The rod-shaped material rotates through multiple cutting knives, thereby realizing multiple cutting of the rod-shaped material. Among them, after completing one cutting, when the rod-shaped material enters the next cutting knife, the outer guide plate and the inner guide plate drive the moving baffle to act on the rod-shaped material through elastic force, eliminating the gap between multiple rod-shaped material segments after cutting, and then the next cutting is carried out.

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