CN112689691B - Control method of weft insertion system of gripper loom - Google Patents
Control method of weft insertion system of gripper loom Download PDFInfo
- Publication number
- CN112689691B CN112689691B CN202080005107.9A CN202080005107A CN112689691B CN 112689691 B CN112689691 B CN 112689691B CN 202080005107 A CN202080005107 A CN 202080005107A CN 112689691 B CN112689691 B CN 112689691B
- Authority
- CN
- China
- Prior art keywords
- loom
- surface temperature
- weft insertion
- insertion system
- jaw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
- D03D47/18—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick two weft inserters meeting at or near the middle of the shed and transferring the weft from one to the other
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/27—Drive or guide mechanisms for weft inserting
- D03D47/277—Guide mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Method for controlling a weft insertion system of a gripper loom, in which a carrying gripper and a pulling gripper are alternately driven inside a shed formed between warp threads by means of a pair of gears (W) by means of a respective flexible belt (B) having said carrying gripper and said pulling gripper, respectively, at one end, said belt (B) being engaged on said gears (W) by means of a series of slots formed longitudinally in the body of the belt (B) and they being kept adhered to a portion of said gears (W) by means of a guiding slider (S), said system operation being monitored by a central control unit of the loom. The control method comprises the following steps: a. continuously detecting the surface temperature of the strip (B) during the operation of the loom; b. calculating parameters representative of the operation of the loom from the surface temperature (Ti) of the belt (B) in the rest condition and the surface temperature (Tf) under friction, the difference (Δt) between said temperatures and their variation over a period of time; c. -comparing said parameter representative of the operation of the loom with a respective predetermined threshold; when the values of the two different sets of parameters exceed the reference threshold value, an alarm message is sent to the operator or a command message is sent to the central control unit of the loom.
Description
Technical Field
The invention relates to a method for controlling a weft insertion system of a gripper loom. In particular, the invention relates to a control method which is adapted to continuously monitor the wear and the operating conditions of the individual components of the weft insertion system according to predetermined parameters and to propose corrective measures for setting the weft insertion system and/or to replace any worn system components if these parameters are not met.
Background
As is known to the expert in the art, the weft insertion system of a gripper loom, as schematically shown in fig. 1, comprises a pair of grippers, respectively a carrying gripper and a drafting gripper, which are moved from opposite sides of the loom and are used to insert a weft yarn into a shed by means of a mutual weft yarn exchange taking place in the middle of the shed. The reciprocating movements of the carrying jaw and the pulling jaw are symmetrically controlled by two flexible belts B, at one end of which the respective jaws are fixed. The respective reciprocating movements of the two belts are imparted by respective gears W whose teeth engage in a series of consecutive slots F formed along the central portion of the belt B. The reciprocating rotary motion of the gear W is imparted by a loom main electric motor whose continuous rotary motion is conveniently converted into reciprocating rotary motion by a different type of movement mechanism whose structure is not relevant to the object of the present invention.
The correct engagement between each gear W and its corresponding flexible band B (the clamping jaw being fixed at one end of each band) is provided by two guide slides S for each gear. In fact, the guide slider S (which is conveniently radially adjustable with respect to the rotation axis of the relative gear W) keeps the band B curved, being wound snugly around the gear with a predetermined angular width around the engagement zone of the gear in geometrically correct meshing position between the slot F of the band B and the teeth of the gear W. The angular width of such engagement portions is calculated such that the force exerted by the gear W on the belt B does not cause excessive local stresses on the teeth of the gear W, so that the free end of the belt B is guided in the area under the loom when the jaws are outside the shed.
Thus, a centrifugal radial force is induced in the contact area between the surface of the curved band B and the corresponding sliding surface of the guide slider S, which centrifugal radial force comprises a static component (due to the bending stiffness of the band B, which will resume its initial rectilinear shape) and a dynamic component (due to the high-speed rotation of the band B around the axis of the gear W). Such centrifugal forces generate a corresponding friction force, which is a function of the friction coefficient of the material forming the belt B and the guide slider S, the set position of the guide slider S with respect to the axis of the gear W, and the sliding speed, which causes the surfaces of the guide slider S and the belt B in contact with each other to gradually heat. Moreover, by guiding them through the shed in the proper direction, a sliding phenomenon occurs between the side edges of the strips B and the metal guide hooks arranged along the shed, which can return and allow the strips B to maintain their linear configuration.
The thermal energy to be dissipated increases, as a result of an increase in the operating speed of the loom, or else due to incorrect adjustment of the position of the guide slider S, thus causing an increase in the temperature of both the belt B and the guide slider S. Too high a temperature of the guiding vanes S causes the polymeric material of which the belt is made to age more quickly, significantly shortening their service life due to premature wear or breakage. The wear of the belt B in turn causes an adverse effect on other components of the weft insertion system upstream and downstream of the belt. In fact, upstream, the wear of the belt causes an inaccurate match with the teeth of the gear W, thus causing the generation of play that excites an impact event on the gear W each time the direction of rotation of the gear is reversed. Downstream, on the other hand, wear of the belt implies an inaccurate guiding of the jaws, thus leading to an increase in the number of weft yarn exchange errors between the carrying jaw and the drafting jaw and to accelerated wear of the jaws themselves.
The current methods for controlling weft insertion systems in jaw looms do not take into account the above-mentioned interdependencies between the various components of the system, and therefore they monitor the wear conditions of the various components subject to the above-mentioned wear, namely the gear W, the flexible belt B and the jaws, by means of only statistics and direct observation, in order to perform their replacement at the end of their service life estimation.
However, the wear of the various components of the weft insertion system is not a normal phenomenon, nor is it uniform between said components, as it is determined by several concurrence factors. Thus, according to the prior art, estimating the correct time to replace excessively worn components is a very complex process, which requires the intervention of professional and experienced textile operators who can estimate the remaining service life of the various components of the weft insertion system, depending on their appearance and on the type and frequency of the weaving errors that occur. Early replacement of the components of the weft insertion system obviously entails a waste of resources and economic losses, whereas prolonged use in the event of excessive wear would have a serious risk of breakage, with the possible damage to the textile being treated and to the loom components themselves.
The problem addressed by the present invention is therefore to provide an automatic control of the actual wear of the components of the weft insertion system of a jaw loom with the aim of promptly alerting the operator to any possible failure of the weft insertion system, in order to make adjustments to avoid the occurrence of accelerated wear phenomena, or to replace the components to avoid accidental damage to said components during the weaving operation.
In this respect, a first object of the invention is to determine a control parameter which is particularly important for estimating the quality of the actual operating condition of the weft insertion system of a jaw loom and which can be effectively monitored by a sufficiently simple, industrially viable technical process.
A second object of the present invention is to provide a method for controlling a weft insertion system of a jaw loom, which method is easy to handle the above-mentioned variations of control parameters under different operating conditions of the loom in order to distinguish between a malfunction requiring an intervention for adjusting a weft insertion system component and a malfunction requiring replacement of one or more components of the weft insertion system component that have reached a limit wear condition.
Finally, a third object of the invention is to provide a control method which can be integrated with a device providing a direct detection of the degree of wear of the various components of the weft insertion system.
Disclosure of Invention
The problem is solved by a method for controlling the weft insertion system of a jaw loom having the features of the invention, which achieves these objects. Other preferred features of the control method are described below.
Drawings
Further characteristics and advantages of the method for controlling a weft insertion system of a jaw loom according to the invention will become apparent from the following detailed description of a preferred embodiment of the invention, given by way of non-limiting example only, and illustrated in the accompanying drawings, in which:
FIG. 1 is a schematic front view of a gripper loom, showing the basic elements of the weft insertion system of the gripper loom, as described in the introductory part of the present description;
FIG. 2 is a perspective view of a guide slide of a jaw strip according to the present invention;
FIG. 3 is a top perspective view of the guide slide of FIG. 2 showing its internal cooling coil; and
fig. 4 is a view of a cooling circuit which feeds the guide slide of the gripper belt in a gripper weaving machine.
Detailed Description
As a result of the research and experimental estimation that has been carried out, the applicant has concluded that, for the various reasons already indicated in the introductory part of the present description, the key factors of the weft insertion system of a jaw loom can be found certainly in the flexible belt B which drives the jaw movements.
Moreover, among several possible parameters characterizing the actual use of the belt B, the surface temperature of said belt B is found to be of paramount importance in experimental tests carried out by the applicant, such surface temperature (as described above) being directly related to the friction condition of the belt B against the respective guide slider. Since the friction state of the belt operation is in turn related to the main variable operating parameters of the loom, in particular:
-the operating speed of the loom;
-a workroom temperature;
-play between the belts and their guide sliders;
-incorrect tape settings;
-incorrect loom adjustment;
the applicant has thus perceived that the surface temperature of the belt, and the gradient of this surface temperature over a period of time, may be ideal parameters for solving the problem underlying the present invention when accurately and continuously monitored. The present invention is conceived based on this knowledge.
Belt surface temperature measurement
In order to use the surface temperature of the jaw belt as an estimated parameter for the quality of the actual working conditions of the entire weft insertion system, it is first necessary to measure such temperature immediately adjacent to each belt B, and preferably at the point of the belt path where there is the highest friction (thus resulting in the highest belt temperature increase). In fact, by measuring the belt temperature at the location described above, it is possible to detect the actual maximum fluctuation in the local temperature of the belt, which is most important for the purposes of the present invention (rather than the belt average temperature), which variation over time does not advantageously provide such much information.
In this respect, the preferred position is the position where the belt B enters the upper guide slider S, i.e. where the belt is transformed from a curved configuration adhering to the control gear W into a straight configuration assumed in the shed. For convenience, the temperature is measured on the wall of the guide slider S in contact with the running belt B by arranging the temperature sensor 1 on this wall as close as possible to the contact area of said wall with the belt B, so it is here assumed that the temperature of the guide slider S is substantially equal to the surface temperature of the belt B at the same location, it is here assumed that a close mechanical sliding contact is made between the belt B and the guide slider S, and it is also considered that the guide slider S is manufactured from a metallic material having a high thermal conductivity. Thus, the combined observations of the two lead to the belief that the temperature difference between the belt B and the guide slider S at the above-mentioned position is negligible.
The sensor 1 thus constantly detects the surface temperature of the belt B in the friction state (hereinafter referred to as Tf), and for each of the two belts B operating simultaneously in the loom, the information of said temperature Tf they collect during the weaving is resent and stored in the central control unit of the loom for further processing.
Also, the temperature of the belt B in the rest condition (hereinafter referred to as Ti) needs to be detected, which serves as a reference for estimating the temperature increase of the belt B, which is directly related to friction during knitting, rather than being caused by the overall overheating of the individual looms or between the knits. However, it is practically impossible to directly detect this temperature, because the limited area of the belt B, which is not directly affected by the friction phenomenon with the belt guide slider, will inevitably be affected by the increased temperature of the surrounding area under friction.
In order to reliably measure the surface temperature Ti of the belt B in the rest condition, it is assumed according to the invention that this temperature is reasonably approximately equal to the room temperature in the vicinity of the belt working area. However, it is not easy nor practical to measure the room temperature directly, since it varies locally over a large range depending on a greater or lesser proximity to the "hot" parts of the loom, and it is therefore difficult to determine the correct position at which the temperature can be detected significantly. Thus, according to a feature of the invention, it is considered more efficient and convenient to measure the room temperature in an indirect way, controlling its effect on the thermal state of the loom, i.e. using the temperature of the lubricating oil contained in the tank of the loom and its variation over time as a direct indicator of the thermal state of the machine and as an indirect indicator of the local room temperature.
Thus, given that the temperature of the lubricating oil before starting the braiding operation is taken as the initial room temperature and thus as the surface temperature Ti of the belt B in the resting condition, any subsequent variation of the temperature of the lubricating oil under operating conditions will be considered as a sufficiently accurate measurement of the corresponding variation of room temperature (involving the single machine under consideration), and therefore of the surface temperature Ti of the belt B in the resting condition. Thus, by such a selection, the increased value of the band B temperature can be automatically corrected according to the effect caused by any change in the local space temperature.
The temperature data thus collected are then processed in the central control unit of the weaving machine in order to provide important parameters of the working conditions of the weft insertion system, such as the following main parameters:
-Ti: surface temperature of the belt in rest conditions;
-Tf: the surface temperature of the belt under friction;
- Δt= (Tf-Ti): an increase in the surface temperature of the belt under friction during the initial transition phase;
-G: increasing the temperature from Ti to Tf during the initial transition phase by a gradient VS time;
- Δtd: delta T values increased during daily treatments;
-Gm: the gradient of the temperature Tf during prolonged operation, wherein the temperature Tf is normalized at a predetermined reference room temperature.
Reference value and reference threshold
The above parameter values are experimentally checked after an initial break-in period, during which the various components are mechanically stable, on a test loom, in which the weft insertion system is formed by new components, mounted entirely on the loom. Thus, theoretical reference values are established, which are considered as optimal values for the respective parameters described above.
When the control method of the invention is provided on a single specific weaving machine, these reference values are improved by a self-learning process performed during an initial operating phase after an initial break-in period (in this case by a weft insertion system comprising new components), thus determining a series of actual reference values specific to said specific weaving machine.
Similarly, a series of reference thresholds for the parameters are determined from the experimental data, beyond which measures must be taken, such as replacing parts that show obvious signs of wear or gradually reducing the braiding speed to such a value that the parameter under consideration falls below the threshold.
Adjustment and replacement
Based on the above-mentioned parameters and their comparison between the relative reference value and the reference threshold value, the control method of the invention can send an alarm message to the user and/or direct an instruction to the central control unit of the weaving machine in order to change its operation. For example, this information may simply suggest to the operator in a first stage to gradually reduce the weaving speed of the weaving machine stepwise, or to replace worn parts, or even to check the mechanical adjustment of different parts. In the event of severe wear of the components, the central control unit of the loom may either limit the weaving speed gradually directly, or prevent the machine from restarting after a first stop for other reasons, or even pause the loom.
In particular, according to another feature of the method of the invention, when a first set of parameters (for example Tf, Δt and Δtd) related to the surface temperature of the strip B exceeds their threshold values, while a second set of parameters (for example G and Gm) related to the gradient of the surface temperature of the strip B over a period of time does not exceed their threshold values, this is considered as an indicator of the reaching of a limit wear condition by one or more components of the weft insertion system, and thus sends information of this to the operator.
Conversely, when both of the above parameter sets exceed their thresholds, the fault is considered to be caused by incorrect mechanical adjustment of the component, and thus corresponding information is sent to the operator.
The control method of the invention can also be easily integrated with other information from one or more devices, preferably optical, electrical, electronic or electromagnetic devices, which directly monitor the wear status of the components of the weft insertion system. This additional information can be coordinated with the above-mentioned information about the surface temperature of the jaw strip B in order to provide the operator with more accurate information about the specific components of the weft insertion system, which components have reached the extreme wear condition and need to be replaced.
Forced cooling of the surface temperature of the strip
The control method according to the invention also provides for a direct cooling intervention when the surface temperature Tf of the strip B under friction approaches a reference threshold value, so as to reduce or limit the temperature of the guide slider S of said strip B in the zone of contact with the strip, so as to remove the heat generated by friction by the circulation of the refrigerant fluid inside the same guide slider, thus avoiding the occurrence of accelerated damages of said strip B due to overheating.
Such forced cooling can be performed permanently when the temperature Tf is greatly increased due to the increase of the room temperature. Conversely, when the excessive temperature Tf is due to a problem of mechanical adjustment or due to the use of worn parts, the forced cooling may be a temporary cooling, but such adjustment/replacement must be delayed, for example, in order to complete the knitting operation of the article. In this way, the operation can be completed practically without interruption thanks to said forced cooling, so that the belt B remains in a safe state.
The view of fig. 4 shows in a simplified manner a possible cooling circuit for the guide slide S of the belt of the gripper weaving machine. The refrigerant fluid circulates inside the guide slider S in order to remove a portion of the heat generated by friction between the external surface of the belt and the guide slider itself. A pump 2 of suitable size located downstream of the tank 3 pushes the refrigerant fluid into the guide slide S. The energy exchange between the two elements in contact causes the temperature of the guide slider S to decrease (although resulting in an increase in the temperature of the refrigerant fluid). Thus, the refrigerant fluid is passed through one or more static radiators 4 (or any other active device that is prone to heat dissipation) before re-entering the tank, in order to reduce its temperature.
The internal structure of a guide slider S equipped with such a cooling device is shown in fig. 3 and comprises one or more channels 5 for the internal circulation, in which channels 5 the refrigerant fluid flows. The metallic material of the body of the guide slider S further promotes heat dissipation to the external environment and heat exchange with the refrigerant fluid.
The refrigerant fluid may be specifically selected for this purpose, a dedicated suitable cooling circuit may be used, or a circulation system of the loom lubricating oil may be used (when available) so that a portion of the fluid flow is diverted to the guide slide to be cooled. The choice between these two cooling systems obviously also depends on the desired cooling system performance.
In particular, when the temperature of the lubricating oil of the weaving machine (generally on average 55-65 ℃) is too high to allow such cooling, i.e. when the reference threshold value of the surface temperature Tf of the strip B under friction is <55 ℃, by combining the guide slider S and the Peltier element, it is still possible to use the main circuit of the lubricating oil as a cooling source, the negative thermoelectric effect of the battery acting to reduce the temperature of the guide slider S, so that the cooling circuit is responsible for reducing the temperature of the hot side of the Peltier element.
In practice, by supplying power to the peltier element, a heat flow is obtained from one side of the battery (which side cools) to the opposite side of the battery (which opposite side thus heats). The "cold side" of the battery is the side in contact with the body of the guide slide S in order to absorb part of the heat generated by friction with the belt B, thereby cooling the side of the guide slide in contact with said belt. In contrast, in addition to the heat generated by the joule effect of the peltier element itself, the heat removed from the cold side is also transferred to the "hot side".
In this case, therefore, it is also necessary to apply a heat-dissipating system, which is provided only by a cooling circuit using loom lubricating oil as refrigerant fluid, in order to guarantee the integrity of the peltier element itself. As an advantage of this solution, a lower temperature of the guide slider S (compared to the temperature achievable by conventional systems) can be achieved due to the cooling effect of the peltier elements. Moreover, the oil of the forced lubrication circuit of the weaving machine can be used as a refrigerant fluid, thanks to the removal of the generated heat from the higher-temperature guide slider S, although its temperature is higher than the surface temperature Tf of the belt B under friction, which is generally desired.
From the foregoing description it will be apparent how the invention fully achieves all its intended objects. In practice, the surface temperature of the belt has proven to be an easily monitored parameter as a control parameter for the actual operating conditions of belt B. This parameter is also particularly important in the case of highly efficient and time-critical abnormal operating conditions of the weaving machine, whether they be due to incorrect adjustment or because excessively worn components are used, so that the first object of the invention is fully achieved.
Furthermore, handling additional control parameters related to the gradient of the above-mentioned basic control parameters over a period of time and using the parameters in the control method will make it possible to select the type of intervention to be performed on the loom, i.e. to adjust or replace the components of the weft insertion system by guiding the operator, and to provide him with a specific indication of the components to be replaced when the control method is integrated with the dedicated device for detecting wear of said components. Thus, the second and third objects of the present invention are also fully achieved.
It should be understood, however, that the invention is not to be construed as limited to the particular arrangements disclosed as exemplary embodiments of the invention, but is to be accorded the widest scope possible and that all such changes are within the scope of the invention as defined solely by the following claims without departing from the scope of the invention.
Claims (12)
1. Control method for controlling a weft insertion system of a gripper loom, wherein a carrying jaw and a pulling jaw are alternately driven into the interior of a shed formed between warp threads by a pair of gears (W) by means of a respective flexible belt (B) having at one end said carrying jaw and said pulling jaw, respectively, each of said flexible belts (B) being engaged on a respective gear (W) by means of a series of slots formed in the body of said flexible belt (B) in the longitudinal direction and remaining adhered to a portion of said gear (W) by means of a guide slider (S), the operation of said weft insertion system being monitored by a central control unit of the loom, said control method comprising the steps of:
a. detecting the surface temperature (Ti) of the flexible band (B) in the rest condition and the surface temperature (Tf) under friction during the operation of the loom; and
b. calculating parameters representative of the operation of the loom from the surface temperature (Ti) of the flexible belt (B) in the rest condition, the surface temperature (Tf) under friction, the difference (Δt) between these two temperatures and their variation over time;
characterized in that as the surface temperature (Ti) of the flexible belt (B) in the rest condition, a room temperature is employed in the vicinity of the working area of the flexible belt (B), which is indirectly detected as the lubricating oil temperature in the lubricating oil tank on board the loom, and in that the method further comprises the steps of:
c. comparing said parameter representative of the operation of the loom with a corresponding predetermined threshold;
d. respectively consider
i. A first set of parameters related to the surface temperature (Ti) of the flexible band (B) in rest conditions and to the surface temperature (Tf) under friction exceeding said predetermined threshold value, and
a second set of parameters relating to the gradient of variation of the surface temperature (Ti) of the flexible band (B) in rest conditions and of the surface temperature (Tf) under friction over a period of time exceeding the predetermined threshold;
e. when the actual values of the parameters of the first set of parameters exceed their respective predetermined threshold values, and the actual values of the parameters of the second set of parameters do not exceed their respective predetermined threshold values, sending an alarm message to the operator or a command message to the central control unit of the loom, the alarm message or the command message indicating that one or more components of the weft insertion system reach a limit wear state; and
f. when the actual values of the parameters of the first and second set of parameters both exceed their respective predetermined thresholds, an alarm message is sent to the operator or a command message is sent to the central control unit of the loom, which alarm message or command message indicates a possible incorrect mechanical adjustment of the components of the weft insertion system.
2. A control method for controlling a weft insertion system of a jaw loom according to claim 1, wherein said first set of parameters representing the operation of the loom are as follows:
tf: the surface temperature of the flexible belt under the friction effect;
Δt= (Tf-Ti): an increase in the surface temperature (Tf) of the flexible band (B) under friction during an initial transition phase;
Δtd: delta T increases during daily treatment.
3. The control method for controlling the weft insertion system of a jaw loom according to claim 2, wherein: the second set of parameters representing the operation of the loom are as follows:
g: -a gradient of variation of the surface temperature (Tf) of the flexible band (B) under friction over a period of time during the initial transition phase;
v.gm: a gradient of variation of the surface temperature (Tf) of the flexible band (B) under friction over a period of time during an extended operation of the treatment, wherein the surface temperature (Tf) of the flexible band under friction is normalized at a predetermined reference room temperature.
4. The control method for controlling the weft insertion system of a jaw loom according to claim 1, wherein: the surface temperature (Tf) of each flexible strip (B) under friction is detected by measuring the temperature of the upper guide slider (S) wall in contact with the flexible strip (B) in the position where the flexible strip (B) enters the guide slider (S).
5. The control method for controlling the weft insertion system of a jaw loom according to claim 4, wherein: during the initial break-in period, after which the various components are mechanically stable, the parameters representing the operation of the loom are experimentally detected on a test loom, in which the weft insertion system is formed by new components, is mounted entirely on the loom, and the theoretical reference value thus established is considered to be the optimal value for each of the above parameters.
6. The control method for controlling the weft insertion system of a jaw loom according to claim 5, further comprising: means for monitoring the wear state of one or more components of the weft insertion system.
7. The control method for controlling the weft insertion system of a jaw loom according to claim 4, further comprising the steps of: when the surface temperature (Tf) of the flexible strip (B) under friction exceeds a predetermined threshold temperature, the forced cooling of at least one guiding slider (S) of the flexible strip (B) is performed.
8. The control method for controlling the weft insertion system of a jaw loom according to claim 7, wherein: in the forced cooling step, loom lubricating oil is used as the refrigerant fluid.
9. The control method for controlling the weft insertion system of a jaw loom according to claim 8, wherein: in the forced cooling step, a peltier element is used, the cold side of which is arranged in contact with the guiding slider (S) to be cooled, and the hot side of which is cooled by using loom lubricating oil as a refrigerant fluid.
10. The control method for controlling a weft insertion system of a jaw loom according to any of the preceding claims 7 to 9, wherein: when the surface temperature (Tf) of the flexible belt (B) under friction exceeds a first predetermined threshold temperature, the weaving speed of the loom is gradually reduced until the surface temperature (Tf) of the flexible belt (B) under friction drops below the first predetermined threshold temperature.
11. The control method for controlling the weft insertion system of a jaw loom according to claim 10, wherein: when the surface temperature (Tf) of the flexible band (B) under friction exceeds a second predetermined threshold temperature, the loom is prevented from restarting after its first stop.
12. The control method for controlling the weft insertion system of a jaw loom according to claim 11, wherein: when the surface temperature (Tf) of the flexible band (B) under friction exceeds a third predetermined threshold temperature, the loom is paused.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102019000009357 | 2019-06-18 | ||
| IT102019000009357A IT201900009357A1 (en) | 2019-06-18 | 2019-06-18 | METHOD OF CHECKING THE WEFT INSERTION SYSTEM OF A CLIP-ON TEXTILE LOOM |
| PCT/IB2020/055647 WO2020254981A1 (en) | 2019-06-18 | 2020-06-17 | Control method of a weft insertion system of a gripper loom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112689691A CN112689691A (en) | 2021-04-20 |
| CN112689691B true CN112689691B (en) | 2023-10-10 |
Family
ID=68426590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080005107.9A Active CN112689691B (en) | 2019-06-18 | 2020-06-17 | Control method of weft insertion system of gripper loom |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3821064B1 (en) |
| JP (1) | JP7453965B2 (en) |
| CN (1) | CN112689691B (en) |
| IT (1) | IT201900009357A1 (en) |
| WO (1) | WO2020254981A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874341B (en) * | 2022-12-27 | 2024-05-14 | 武汉纺织大学 | Heat dissipation device for electromagnetic weft insertion |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039078A (en) * | 1988-05-10 | 1990-01-24 | 瓦马特克斯公司 | The band of control clip weft yarn motion in shuttleless loom |
| JPH05156548A (en) * | 1991-12-09 | 1993-06-22 | Tsudakoma Corp | Method for preventing breakage of band of band rapier loom and apparatus therefor |
| US5318077A (en) * | 1991-09-11 | 1994-06-07 | Tsudakoma Kogyo Kabushiki Kaisha | Abrasion detector for a rapier band |
| CN1375021A (en) * | 1999-09-16 | 2002-10-16 | 皮克诺尔公司 | Method and device for monitoring the wear of a rapier band |
| JP2004100070A (en) * | 2002-09-09 | 2004-04-02 | Toyota Industries Corp | Cooling unit of rapier band in rapier loom |
| CN101148799A (en) * | 2006-09-22 | 2008-03-26 | 圣豪纺织机械有限公司 | Device for controlling a flexible rapier and shuttle loom including at least one such device |
| CN101200836A (en) * | 2006-11-15 | 2008-06-18 | 圣豪纺织机械有限公司 | Weft insertion device, carpet loom equipped with such a device and method for treating a weft insertion error in such a loom |
| CN202466086U (en) * | 2012-03-12 | 2012-10-03 | 天津海天长丰科技开发有限公司 | Weft insertion device of loom |
| CN205603788U (en) * | 2016-03-08 | 2016-09-28 | 山东日发纺织机械有限公司 | Loom online temperature alarm display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204211911U (en) * | 2014-11-11 | 2015-03-18 | 安吉县青云麻纺织厂 | A kind of sword belt pressue device |
| BE1022754B1 (en) * | 2015-02-26 | 2016-08-30 | Picanol Nv | GUIDANCE DEVICE FOR A LANS FOR A GRIPPER WEAVING MACHINE |
| CN204803499U (en) * | 2015-06-25 | 2015-11-25 | 蒙山县五丰丝绸有限公司 | Sward belt radiator of rapier loom |
-
2019
- 2019-06-18 IT IT102019000009357A patent/IT201900009357A1/en unknown
-
2020
- 2020-06-17 WO PCT/IB2020/055647 patent/WO2020254981A1/en unknown
- 2020-06-17 CN CN202080005107.9A patent/CN112689691B/en active Active
- 2020-06-17 EP EP20753417.3A patent/EP3821064B1/en active Active
- 2020-06-17 JP JP2021513945A patent/JP7453965B2/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039078A (en) * | 1988-05-10 | 1990-01-24 | 瓦马特克斯公司 | The band of control clip weft yarn motion in shuttleless loom |
| US5318077A (en) * | 1991-09-11 | 1994-06-07 | Tsudakoma Kogyo Kabushiki Kaisha | Abrasion detector for a rapier band |
| JPH05156548A (en) * | 1991-12-09 | 1993-06-22 | Tsudakoma Corp | Method for preventing breakage of band of band rapier loom and apparatus therefor |
| CN1375021A (en) * | 1999-09-16 | 2002-10-16 | 皮克诺尔公司 | Method and device for monitoring the wear of a rapier band |
| JP2004100070A (en) * | 2002-09-09 | 2004-04-02 | Toyota Industries Corp | Cooling unit of rapier band in rapier loom |
| CN101148799A (en) * | 2006-09-22 | 2008-03-26 | 圣豪纺织机械有限公司 | Device for controlling a flexible rapier and shuttle loom including at least one such device |
| CN101200836A (en) * | 2006-11-15 | 2008-06-18 | 圣豪纺织机械有限公司 | Weft insertion device, carpet loom equipped with such a device and method for treating a weft insertion error in such a loom |
| CN202466086U (en) * | 2012-03-12 | 2012-10-03 | 天津海天长丰科技开发有限公司 | Weft insertion device of loom |
| CN205603788U (en) * | 2016-03-08 | 2016-09-28 | 山东日发纺织机械有限公司 | Loom online temperature alarm display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112689691A (en) | 2021-04-20 |
| JP2022537469A (en) | 2022-08-26 |
| EP3821064A1 (en) | 2021-05-19 |
| JP7453965B2 (en) | 2024-03-21 |
| EP3821064B1 (en) | 2023-11-29 |
| IT201900009357A1 (en) | 2020-12-18 |
| WO2020254981A1 (en) | 2020-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112689691B (en) | Control method of weft insertion system of gripper loom | |
| CN101376474B (en) | Method for controlling the tension of the yarn unwinding, and apparatus for carrying out such method | |
| US20160121445A1 (en) | Method for controlling temperature adjustment system of machine | |
| US10199900B2 (en) | Rotating machine | |
| CN106536430B (en) | Method for making a glass ribbon | |
| KR20190050739A (en) | Robot control device and robot equipped with this control device | |
| EP3262222B1 (en) | Guide device for a rapier in a gripper weaving machine | |
| WO2020174961A1 (en) | Bearing cooling mechanism for roll press device, bearing cooling method for roll press device, and roll-press device | |
| EP3452395B1 (en) | Method for monitoring and controlling the supply of a thread to a textile machine and supply device thereof | |
| TW201712178A (en) | Loop-forming method and device | |
| US20130334187A1 (en) | Wire electrode annealing processing method and wire electric discharge machining device | |
| CN110159714A (en) | Regulating device is used in a kind of weaving | |
| ITTO20010737A1 (en) | PERFECTED METHOD AND SYSTEM FOR CHECKING BRAKES AND ELECTRIC-CONTROLLED DEVICES FOR AUTOMATIC ADJUSTMENT OF MECHANICAL VOLTAGE | |
| CN113507990B (en) | Device and method for transporting a strip material, in particular a hot-rolled strip | |
| CN114127348B (en) | Textile machine, loom with such a textile machine and associated method | |
| CN211056400U (en) | A overspeed device tensioner for weaving equipment is last | |
| CN107557946B (en) | Management method and management device for bearing in shedding device of loom | |
| CN103103661B (en) | Revise method and the weaving loom of the parameter determined by the bar thickness of ribbon | |
| US2392913A (en) | Electrical control apparatus | |
| EP3597806A1 (en) | Method for stopping loom and loom for realizing stopping method | |
| US2928431A (en) | Loom temple with thread parting means | |
| CN109477259A (en) | For cutting the device of velvet head line on loom | |
| CN112481928B (en) | Control method for temperature rise of motor and washing machine | |
| US2478157A (en) | Loom harness | |
| EP1212479A1 (en) | Method and device for monitoring the wear of a rapier band |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |