Method for increasing the production capacity of a palletizing machine indexing grouping unit

Abstract

A method for improving the production capacity of a palletizing machine indexing and grouping unit, the method comprising a buffer stop conveyor, a short indexing conveyor, an indexing mechanism, a short buffer stop grouping machine, a grouping conveyor, the buffer stop conveyor being provided with the short indexing conveyor in front of the conveying direction, the short indexing conveyor being provided with the short buffer stop grouping machine in front of the conveying direction, the short buffer stop grouping machine being provided with the grouping conveyor in front of the conveying direction, the short indexing conveyor being provided with the indexing mechanism above the middle part, the short buffer stop grouping machine being provided with at most one longitudinal bag or two transverse bags, the effective length X of the short indexing conveyor and the effective length Y of the short buffer stop grouping machine satisfying the following requirements: (1) 1.5 times the length L of the longitudinal bag A ≥ X ≥ the length L of the longitudinal bag A; (2) 2.5 times the width W of the longitudinal bag A ≥ Y ≥ 2 times the width W of the longitudinal bag A. The method can significantly improve the production capacity of the palletizing machine.

Description

TECHNICAL FIELD

[0001] The application discloses a method for improving production capacity of a transposition grouping unit of a palletizer, and belongs to the field of packaging machines. BACKGROUND

[0002] As shown in Figure 4 , a (2+3) grouping mode is usually adopted when the material bag is palletized, that is, two longitudinal material bags A and three transverse material bags B form a layer of material bags. Figure 2 , Figure 3 As shown in the prior art, the palletizer usually comprises a buffer conveyor 1, a long transposition conveyor 6, a transposition mechanism 3, a long buffer grouping machine 7 and a grouping conveyor 5, wherein the conveyors are all belt conveyors, the effective length of the long transposition conveyor 6 is about twice the length L of the longitudinal material bag A, and the effective length of the long buffer grouping machine 7 is three times the width W of the longitudinal material bag A and is not less than twice the length L of the longitudinal material bag A. Figure 2 As shown in the prior art, when the transposition mechanism 3 fails to complete the transposition of the transverse material bag B within a set time due to some reasons, the next longitudinal material bag A will enter the long transposition conveyor 6, and at this time, the conveying belt of the long transposition conveyor 6 is in a stop state, so that the longitudinal material bag A fails, in order to avoid this failure, the longitudinal material bag A must be stopped at the outlet of the buffer conveyor 1 and wait for the transposition mechanism 3 to complete the transposition of the transverse material bag B, thereby reducing the production capacity of the palletizer. Figure 3 As shown in the prior art, the transposed transverse material bag B is conveyed forward together with the three transverse material bags B grouped on the long buffer grouping machine 7, and the subsequent longitudinal material bag A is also conveyed forward, when the tail of the longitudinal material bag A has entered the long buffer grouping machine 7, the long buffer grouping machine 7 needs to be stopped, and at this time, the three transverse material bags B grouped together have not completely left the long buffer grouping machine 7, thereby causing the three transverse material bags B to fail, in order to avoid this failure, the longitudinal material bag A needs to be stopped at the outlet of the long transposition conveyor 6 and wait for the three transverse material bags B to leave the long buffer grouping machine 7, thereby also reducing the production capacity of the palletizer. SUMMARY

[0003] In order to solve the problem that the buffer stop conveyor 1 and the long indexing conveyor 6 in the existing palletizer frequently stop, thereby causing the overall production capacity of the palletizer to decrease, the application provides a method for improving the production capacity of the indexing and grouping unit of the palletizer, wherein the method is provided with the buffer stop conveyor 1, the short indexing conveyor 2, the indexing mechanism 3, the short buffer stop grouping machine 4 and the grouping conveyor 5, the buffer stop conveyor 1 is provided with the short indexing conveyor 2 in front of the conveying position, the short indexing conveyor 2 is provided with the short buffer stop grouping machine 4 in front of the conveying position, the short buffer stop grouping machine 4 is provided with the grouping conveyor 5 in front of the conveying position, the short indexing conveyor 2 is provided with the indexing mechanism 3 above the middle part, the short buffer stop grouping machine 4 stores one longitudinal bag A or two transverse bags B at most, the length of the longitudinal bag A is L, the width of the longitudinal bag A is W, the effective length X of the short indexing conveyor 2 and the effective length Y of the short buffer stop grouping machine 4 meet the following requirements:

[0004] (1) 1.5 times of the length L of the longitudinal bag A ≥ X ≥ the length L of the longitudinal bag A;

[0005] (2) 2.5 times of the width W of the longitudinal bag A ≥ Y ≥ 2 times of the width W of the longitudinal bag A.

[0006] The technical principle of the application is as follows:

[0007] The speed of all belt conveyors is V, the diameter of the conveying drum is Ø, the time for the indexing mechanism 3 to complete the indexing of the transverse bag B is T, the gap length between the front and rear longitudinal bags A on the buffer stop conveyor 1 is D, the production capacity of the indexing and grouping unit is C (the number of longitudinal bags A conveyed per unit time), the small gap between the front and rear belt conveyors is ignored, then the gap length d between the longitudinal bag A on the buffer stop conveyor 1 and the transverse bag B on the short indexing conveyor 2 after the indexing of the front longitudinal bag A is completed (the longitudinal bag A becomes the transverse bag B) can be expressed as formula one (as shown in the Figure 5 The gap length between the longitudinal bag A on the short buffer stop grouping machine 4 and the three grouped transverse bags B on the grouping conveyor 5 is also the same d value (as shown in the Figure 6 ).

[0008] Formula one: d=D-V*T.

[0009] The production capacity C of the indexing and grouping unit can be expressed as formula two.

[0010] Formula two: C=V / (D+L).

[0011] In order to avoid the phenomenon that the longitudinal bag A stops at the outlet position of the buffer stop conveyor 1, the d value should meet formula three, and in order to avoid the phenomenon that the longitudinal bag A stops at the outlet position of the short indexing conveyor 2, the d value should meet formula four.

[0012] Formula three: d>=0+ (X-W) / 2.

[0013] Formula four: d>=0+Y-L.

[0014] From formula one, D=d+V*T, for a specific indexing unit, V and T are constant, so D is proportional to d, from formula two, C is inversely proportional to D, so C is inversely proportional to d, when d is the minimum, the maximum C can be obtained.

[0015] From formula three, d>=0.5X+0-0.5W, where 0 and W are constant, when X is the minimum, the minimum d can be obtained, according to the actual function of the short indexing conveyor 2, the minimum value of X is equal to the length L of the longitudinal bag A, so when the effective length X of the short indexing conveyor 2 is equal to the length L of the longitudinal bag A, the maximum value of the production capacity C of the indexing unit can be obtained, and as X increases, d also increases, resulting in a decrease in C, and the production capacity of the indexing unit decreases.

[0016] From formula four, since 0 and L are constant, when Y is the minimum, the minimum d can be obtained, according to the actual function of the short indexing conveyor 2, the minimum value of Y is equal to 2 times the width W of the longitudinal bag A, so when the effective length Y of the short indexing conveyor 2 is equal to 2*W, the maximum value of the production capacity C of the indexing unit can be obtained.

[0017] The minimum d values obtained from formula three and formula four are not equal, and the larger d value should be taken to calculate the maximum production capacity C of the indexing unit.

[0018] When V=1200mm / s, 0=140mm, T=0.8s, L=700mm, W=470mm, X=2*L=1400mm and Y=3*W=1410mm, the minimum d value is 850mm, and the maximum C value is 0.478 / s; when X=L=700mm and Y=2*W=940mm, the minimum d value is 380mm, and the maximum C value is 0.588 / s. From the above calculation, the production capacity of the indexing unit when X=L and Y=2W is 123% of the production capacity when X=2L and Y=3W, that is, the production capacity of the stacking machine is improved by 23%.

[0019] The beneficial effects of the present application are:

[0020] By setting the minimum effective length of the short indexing conveyor 2 and the short indexing conveyor 4, the problem of frequent stopping of the indexing conveyor 1 and the short indexing conveyor 2 is avoided, and the production capacity of the indexing unit reaches the maximum, so that the entire stacking machine can reach the highest stacking capacity. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the schematic diagram of the arrangement of the present application.

[0022] Figure 2 is the schematic diagram of the buffer stop conveyor 1 which needs to be paused.

[0023] Figure 3 is the schematic diagram of the long indexing conveyor 6 which needs to be paused.

[0024] Figure 4 is the schematic diagram of the stacking of the longitudinal bags A and the transverse bags B.

[0025] Figure 5 is the schematic diagram of the calculation of the minimum d value between the buffer stop conveyor 1 and the short indexing conveyor 2.

[0026] Figure 6 is the schematic diagram of the calculation of the minimum d value between the short buffer stop grouping machine 4 and the grouping conveyor 5. DETAILED DESCRIPTION

[0027] The detailed description of the present application is described with reference to Figures 1 to 6 A method for improving the production capacity of the indexing grouping unit of the stacker, wherein the method is provided with a buffer stop conveyor 1, a short indexing conveyor 2, an indexing mechanism 3, a short buffer stop grouping machine 4, and a grouping conveyor 5, the front of the conveying of the buffer stop conveyor 1 is provided with the short indexing conveyor 2, the front of the conveying of the short indexing conveyor 2 is provided with the short buffer stop grouping machine 4, the front of the conveying of the short buffer stop grouping machine 4 is provided with the grouping conveyor 5, the middle part of the short indexing conveyor 2 is provided with the indexing mechanism 3 above, the short buffer stop grouping machine 4 stores at most one longitudinal bag A or two transverse bags B, the length of the longitudinal bag A is L, and the width is W, the effective length X of the short indexing conveyor 2 is equal to the length L of the longitudinal bag A, and the effective length Y of the short buffer stop grouping machine 4 is equal to 2 times the width W of the longitudinal bag A.

Claims

1. A method for improving the production capacity of a palletizing machine indexing grouping unit, wherein a buffer stop conveyor (1), a short indexing conveyor (2), an indexing mechanism (3), a short buffer stop grouping machine (4), and a grouping conveyor (5) are provided, the buffer stop conveyor (1) is provided with the short indexing conveyor (2) in front of the conveying direction, the short indexing conveyor (2) is provided with the short buffer stop grouping machine (4) in front of the conveying direction, the short buffer stop grouping machine (4) is provided with the grouping conveyor (5) in front of the conveying direction, the middle part of the short indexing conveyor (2) is provided with the indexing mechanism (3) above, and the short buffer stop grouping machine (4) is provided with at most one longitudinal bag (A) or two transverse bags (B), the length of the longitudinal bag (A) is L, and the width is W, the effective length X of the short indexing conveyor (2) and the effective length Y of the short buffer stop grouping machine (4) satisfy the following requirements: (1) 1.5 times the length L of the longitudinal bag (A) ≥ X ≥ the length L of the longitudinal bag (A); (2) 2.5 times the width W of the longitudinal bag (A) ≥ Y ≥ 2 times the width W of the longitudinal bag (A). ​ ​

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