JP2006284554A - Method and device for cutting and weighing raw material rubber, and method and device for feeding material rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for cutting and weighing raw material rubber, which control equipment cost and enable automation, without causing handling troubles of the raw material rubber, and which improve the dispersion of compounding agents, when the material rubber is kneaded by heating the raw material rubber to a predetermined temperature quickly and uniformly. <P>SOLUTION: The raw material rubber mass (a), supplied by a raw material rubber feed device 1, is cut by a cutting device 3 and divided into a group of rubber pieces b having a weight smaller than the error tolerance. A group of the rubber pieces b is sorted into an individual weighing conveyer 7 for each kind of the raw material rubber by a sorting device 5. The weight of the rubber piece b is weighed by the individual weighing conveyer 7. The rubber piece b of a quantity corresponding to the weight required for kneaded rubber material corresponding to one batch is carried out. The total weight of rubber pieces b' corresponding to one batch is weighed by an accumulation weighing conveyer 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a raw rubber cutting and measuring method and apparatus for obtaining a batch of kneaded rubber material, and a raw rubber charging method and apparatus using the same, and more specifically, the equipment cost is reduced and the raw material is reduced. Raw rubber cutting and metering method and equipment that can be automated without causing rubber handling troubles, and blending when kneading by kneading raw rubber quickly to a specified temperature with less variation The present invention relates to a raw material rubber charging method and apparatus that improve the dispersion of the agent.

  As a method and apparatus for obtaining a batch of kneaded rubber material to be supplied to a rubber kneader, for example, the shape of a raw rubber lump is measured by a camera, a laser displacement sensor, etc. Techniques have been proposed in which automation is achieved by cutting (see, for example, Patent Documents 1, 2, and 3).

  However, since an advanced calculation function is required when determining the cutting position, there has been a problem that the apparatus cost for determining the cutting position is high, thereby increasing the equipment cost. In addition, when making a kneaded rubber material made of a wide variety of raw rubbers, an apparatus for determining the cutting position for each raw rubber is required, which further increases the equipment cost.

  In addition, when the lump of raw rubber becomes small due to cutting, it is difficult to handle the lump of raw rubber, so it is extremely difficult to cut at an accurate position. It became a factor of hindrance.

  Further, when the raw rubber is kneaded with a kneading machine, if it is heated to a predetermined temperature, the dispersion of the compounding agent such as carbon black can be improved and a uniform rubber composition can be obtained. Conventionally, a large bale-like raw rubber material is heated in a heating chamber, and the heated raw rubber material is cut into small pieces to measure the required amount.

For this reason, it takes a long time to warm to a predetermined temperature, and a large temperature difference occurs between the surface and the inside of the lump, making it difficult to warm uniformly. Thereby, the dispersibility of the compounding agent at the time of kneading could not be improved sufficiently.
Japanese Patent Laid-Open No. 6-190783 Japanese Patent Laid-Open No. 7-12431 JP-A-9-210754

  An object of the present invention is to provide a raw rubber cutting and weighing method and apparatus that can be automated without reducing equipment costs and causing handling trouble of the raw rubber.

  Another object is to heat up the raw rubber quickly to a predetermined temperature so as to reduce the variation, and to improve the dispersion of the compounding agent when kneading, and a raw rubber charging method and apparatus Is to provide.

  The raw rubber cutting / metering method of the present invention that achieves the above object is a raw rubber cutting / metering method for obtaining a batch of kneaded rubber material, the raw rubber supplied by the raw rubber supply device. The lump is cut by a cutting device and divided into a group of rubber pieces having a weight equal to or less than an error tolerance, and the group of rubber pieces is distributed to individual weighing conveyors for each type of raw rubber by a sorting device. The rubber piece is weighed, and an amount of the rubber piece corresponding to the weight required for one batch of the kneaded rubber material is carried out.

  The raw rubber cutting / metering device of the present invention is a raw rubber cutting / metering device for obtaining a batch of kneaded rubber material, the raw rubber supply device for supplying raw rubber lump, A cutting device that cuts a lump of raw rubber into a group of rubber pieces having a weight equal to or less than an error tolerance, a sorting device that distributes the group of rubber pieces according to the type of raw rubber, and each type of raw rubber And an individual weighing conveyor capable of weighing the rubber piece.

  The raw rubber charging method of the present invention is the method according to claim 3, wherein a measured batch of rubber pieces is stored in a charging container, and the rubber pieces are heated to a preset temperature. Then, it is conveyed to a kneader and charged.

  The raw rubber charging device according to the present invention includes a raw rubber cutting and weighing device according to claim 7, a charging container for storing a batch of rubber pieces measured by the cumulative weighing conveyor, and the charging container. And a heating means for heating the rubber piece accommodated in the container to a preset temperature, and a conveying means for conveying the heated rubber piece to the kneading machine by the charging container.

  According to the raw rubber cutting and metering method and apparatus of the present invention described above, a lump of raw rubber supplied by the raw rubber supply device is cut by a cutting device into a group of rubber pieces having a weight equal to or less than an error tolerance. The rubber pieces are divided and weighed on an individual weighing conveyor to carry out an amount of rubber pieces according to the weight required for one batch of kneaded rubber material, so there is no need to use an expensive device for determining the cutting position. By cutting the lump of raw rubber, the amount of raw rubber required for one batch of kneaded rubber material can be obtained. Therefore, the facility is simpler than before, and the facility cost can be kept low.

  Further, even when a kneaded rubber material made of various types of raw material rubber is obtained, it is only necessary to increase the number of individual weighing conveyors, so that the equipment cost can be reduced even in the case of various types.

  Moreover, it is possible to automate without incurring the handling trouble of the raw rubber because the raw rubber lump is not handled by simply cutting the raw rubber lump into a group of rubber pieces. .

  According to the raw rubber charging method and apparatus of the present invention, a batch of rubber pieces cut and cut into pieces is heated, so that the surface area is larger than that of a large bale-like rubber lump so that it can be quickly applied. The rubber pieces can be heated and the individual rubber pieces can be heated substantially uniformly as a whole.

  The heated raw material rubber that has been cut into small pieces is conveyed to a kneading machine while being contained in a charging container, and is charged and kneaded, whereby the dispersion of the compounding agent can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a schematic view of an embodiment of a raw rubber cutting / metering device according to the present invention. The raw rubber cutting / metering device for obtaining a batch of kneaded rubber material is a raw rubber lump a. A raw rubber supply device 1, a cutting device 3 for cutting the raw rubber lump a into a group of rubber pieces b, a sorting device 5 for distributing the group of rubber pieces b according to the type of raw rubber, A plurality of individual weighing conveyors 7 capable of measuring the weight of the rubber piece b for each type, and a cumulative calculation conveyor 9 capable of measuring the total weight of the rubber pieces b ′ unloaded from the individual weighing conveyor 7 into one batch; , These raw rubber supply device 1, cutting device 3, sorting device 5, individual weighing conveyor 7, control device 11 for controlling cumulative weighing conveyor 9, and individual weighing at the time of changeover when making a kneaded rubber material having another composition Left on conveyor 7 A plurality of fraction storage carts 12 for temporarily storing the rubber pieces b.

  The raw rubber supply device 1 includes a conveyor 13 for conveying the raw rubber lump a toward the cutting device 3 and a supply means for supplying the raw rubber lump a stored on the pallet 15 to the conveyor 13 for each type of rubber. 17 is provided. On the conveying side of the conveyor 13, transfer means 19 for transferring the raw rubber lump a to the cutting device 3 is provided. Each raw rubber lump a is a 1 bale lump (for example, 35 kg lump) having a substantially rectangular parallelepiped shape, and is supplied in units of 1 bale.

  The cutting device 3 is installed adjacent to the transfer means 19 of the raw rubber supply device 1 and cuts the raw rubber lump a to allow an error (an error in the amount of rubber for each type of kneaded rubber material for one batch). Permissible value) or less (for example, 3 kg or less when the error tolerance of each type of rubber amount is ± 1.5 kg) is divided into a group of rubber pieces b. The group of rubber pieces b cut here is discharged to the sorting device 5.

  The sorting device 5 is installed adjacent to the discharge side of the cutting device 3 and has a conveyor 21 that conveys a group of rubber pieces b sent from the cutting device 3 toward the individual weighing conveyor 7. When the group of rubber pieces b conveyed on the conveyor 21 reaches the position of the individual weighing conveyor 7 corresponding to the type of the raw rubber, it is transferred from the conveyor 21 to the individual weighing conveyor 7. Yes. This distribution control is performed by a control signal output from the control device 11, and a group (one veil unit) of rubber pieces b is transferred to each individual weighing conveyor 7 for each type of raw rubber.

  Each individual weighing conveyor 7 has a first conveyor 23 installed adjacent to the sorting device 5, a weighing machine 25 for weighing the weight of the rubber piece b, and the measured rubber piece b toward the cumulative weighing conveyor 9. A second conveyor 27 is provided. The rubber pieces b transferred to the first conveyor 23 are sequentially sent to the weighing machine 25, and the rubber pieces b weighed there are sent to the second conveyor 27. The number of individual weighing conveyors 7 is the same as the number of raw rubbers required for one batch of kneaded rubber material.

  When the first conveyor 23 receives the supply of the rubber piece b in units of one bale from the distribution device 5, the individual weighing conveyor 7 outputs a signal notifying the supply to the control means 11. Further, each time the rubber piece b is weighed by the weighing machine 25, the weighed weight value signal is output to the control means 11.

  The cumulative weighing conveyor 9 is installed adjacent to the second conveyor 27 of the individual weighing conveyor 7. When the rubber piece b is placed on the cumulative weighing conveyor 9, the weight of the rubber piece b is measured and measured. The weight value signal is output to the control device 11.

  The control device 11 includes a processing unit 37 that performs each arithmetic processing and a storage unit 39 that stores data. In this storage unit 37, the rubber type data required for one batch of kneaded rubber material, the weight data required for each type, the weight data of the raw rubber lump a in bale units, and the kneaded rubber for one batch The weight data of the material is stored, and when making the kneaded rubber material for the first time, the data of the rubber type, the weight data required for each type, and the weight data of the raw rubber lump a in unit of one bale are included. Based on this, the raw rubber supply device 1 is controlled, and the raw rubber lumps a on the pallet 15 are sequentially supplied to the conveyor 13 by the supply means 17.

  Further, the control device 11 outputs a control signal corresponding to the sequentially supplied raw rubber lump a to the sorting device 5, and the sorting device 5 sorts and transfers the raw rubber to each individual weighing conveyor 7 for each type of raw rubber. .

  The processing unit 37 calculates the weight value of the rubber piece b in each individual weighing conveyor 7. That is, when a signal notifying that the supply of the rubber piece b in one bale unit is received from each individual weighing conveyor 7, the weight value for one bale inputted in advance is added to calculate the total weight value. And stored in the storage unit 39.

  Further, when a weight value signal when the weighing piece 25 measures the rubber piece b is received, a total weight value obtained by adding the weight values is calculated. When this total weight value falls within the allowable error range of the weight data required for each type, the first conveyor 23 is stopped and the rubber piece b is stopped from being sent to the weighing machine 25, while the second conveyor 27 The control device 11 outputs to the individual weighing conveyor 7 an instruction signal for carrying the measured rubber piece b on the cumulative weighing conveyor 9.

  In addition, when the weight value of one batch of weight value signal received from the cumulative weighing conveyor 9 falls within the error tolerance of the weight data for one batch, the charging container 33 for feeding into the rubber kneader is used. The control device 11 outputs an instruction signal to be conveyed toward the cumulative weighing conveyor 9. If it is off, the cumulative weighing conveyor 9 is reversely driven to output an instruction signal to the cumulative weighing conveyor 9 for conveyance toward a collection container (not shown).

  Further, a value obtained by subtracting the total weight value from the total weight value of the rubber piece b is updated as a new total weight value, and is stored in the storage unit 39. When making a batch of kneaded rubber material, if the rubber piece b remains on the individual weighing conveyor 7, it remains when the raw rubber lump a is supplied to the cutting device 3 by the raw rubber supply device 1. The raw rubber is supplied with an instruction signal for instructing the number of raw rubber lumps (rubber amount) supplied by the raw rubber supply device 1 according to the total weight of the rubber pieces b, that is, the total weight value stored in the storage unit 39 Output to device 1.

  For example, one batch of kneaded rubber material to be produced requires 60 kg of type A raw rubber, 30 kg of type B raw rubber, 10 kg of type C raw rubber, and 20 kg of type D raw rubber. On the other hand, the individual weighing conveyor 7 for type A rubber has a 10 kg rubber piece b, the individual weighing conveyor 7 for type B rubber has a 5 kg rubber piece b, and the individual weighing conveyor 7 for type C rubber has an If a 20 kg rubber piece b remains on the 25 kg rubber piece b and the type D individual rubber conveyor 7, the difference (required weight of raw rubber−total weight of the rubber piece b) is calculated.

  60kg-10kg = 50kg for Type A raw rubber, 30kg-5kg = 25kg for Type B raw rubber, 10kg-25kg = -15kg for Type C raw rubber, Type D raw material In the case of rubber, 20 kg-20 kg = 0 kg.

  Assuming that the weight of the raw rubber lump a in units of one bale is 35 kg, an integer value obtained by rounding up the difference / 35 kg is calculated, and this value is used as the number of raw rubber lump a to be supplied. The type A raw rubber lump has two and the type B raw rubber lump has one, and the instruction signal is output. In the case of the type C and type D raw rubbers, the difference is 0 or less, so it is determined that there is a necessary amount on the individual weighing conveyor 7 and no supply instruction signal is output. As a result, the amount of the rubber piece b remaining on the individual weighing conveyor 7 is maintained to the minimum necessary, and the changeover work is facilitated.

  The fraction storage cart 12 is movable between the stock space 41 and the individual weighing conveyor 7. By driving the first conveyor 23 of the individual weighing conveyor 7 in the reverse direction at the time of changing the stage, the individual weighing conveyor 7 is moved. The rubber piece b remaining in the container is discharged to the fraction storage cart 12 for temporary storage. It is possible to transfer the rubber piece b on the fraction storage cart 12 to the individual weighing conveyor 7 and use the old cut rubber piece b first when it is necessary to change the setting again.

Hereinafter, a method for cutting and measuring raw rubber of the present invention using the above-described apparatus will be described.
First, the case where the individual weighing conveyor 7 does not have the rubber piece b left will be described. The raw rubber supply device 1 receives an instruction signal from the control means 11 and cuts the bale raw rubber lump a. Supply to device 3. The instruction signal of the control means 11 is based on the rubber type data necessary for one batch of the kneaded rubber material, the weight data required for each type, and the weight data of the raw rubber lump a in units of one bale. It is an instruction signal for supplying the raw rubber lump a in the order of the rubber type data stored in the storage unit 39 while making the minimum weight exceeding each weight data, and according to the instruction signal, The supply means 17 sequentially supplies the raw rubber lump a on the pallet 15 to the conveyor 13. The supplied order is stored in the storage unit 39 as order data.

  In the cutting device 3, the raw rubber lump a is cut and divided into a group of rubber pieces b having a weight equal to or less than an error tolerance. The divided group of rubber pieces b is then sent to the sorting device 5 where it is sorted for each type of raw rubber and transferred to the individual weighing conveyor 7.

  That is, when the group of rubber pieces b transported on the conveyor 21 reaches the position of the individual weighing conveyor 7 corresponding to the type of raw rubber, the conveyance of the conveyor 21 is stopped, and the group of rubber pieces b is transferred to the individual weighing conveyor 7. It is transferred to. This is performed by a control signal from the control device 11, and the control signal is based on the order data stored in the storage unit 39.

  When the first conveyor 23 receives the rubber piece b from the sorting device 5, each individual weighing conveyor 7 receives a signal informing the control unit 11. In the control means 11, the weight value for one bale inputted in advance is added and the total weight value is calculated (the total weight value when the rubber piece b is not left is the weight value for one bale) and stored. Store in the unit 39.

  The rubber pieces b on the first conveyor 23 are sequentially sent to the weighing machine 25, and the weight of the rubber pieces b is measured by the weighing machine 25. Each time the weighing is performed, the weight value signal is input to the control device 11. The control means 11 sequentially adds the weight values of the weight value signal to calculate the total weight value. When this total weight value falls within the error tolerance value of the weight data required for each type (since each rubber piece b has a weight less than the error tolerance value, the total weight value can fall within this range), The control signal from the control means 11 stops the first conveyor 23 and stops sending the rubber piece b to the weighing machine 25, while the measured rubber piece b on the second conveyor 27 is added to the cumulative weighing conveyor 9. It is carried out to. The total amount of rubber pieces b carried out from each individual weighing conveyor 7 to the cumulative weighing conveyor 9 is an amount corresponding to the weight required for one batch of kneaded rubber material. On the other hand, in the control device 11, the total weight value is updated to a value obtained by subtracting the total weight value of the rubber pieces b carried out.

  In the cumulative weighing conveyor 9, the weight of the rubber piece b ′ is measured, and the measured weight value signal is input to the control device 11. The control means 11 determines whether or not the weight value of one batch of weight value signal received from the cumulative weighing conveyor 9 falls within the error tolerance of the weight data of one batch, and outputs a control signal when entering. Then, the cumulative weighing conveyor 9 conveys one batch of the rubber piece b ′ toward the charging container 33 and discharges it into the charging container 33. This can prevent an incorrect amount of the kneaded rubber material from being charged into the kneader.

  In the case where the rubber pieces b remain on the individual weighing conveyor 7, the raw material supplied by the raw rubber supply device 1 according to the total weight value for each type of raw rubber stored in the storage unit 39 as described above. An instruction signal indicating the number of rubber lumps a is output, and the raw rubber supply device 1 supplies the raw rubber lumps a in units of one bail to the cutting device 3 accordingly. At this time, the order of the supplied raw rubber lump a is stored in the storage unit 39 as updated order data. The subsequent steps are the same as above.

  According to the present invention described above, the lump of raw rubber a supplied by the raw rubber supply device 1 is cut by the cutting device 3 and divided into a group of rubber pieces b having a weight equal to or less than the error tolerance, and an individual weighing conveyor. 7, the rubber piece b is weighed and the amount of the rubber piece b corresponding to the weight required for one batch of the kneaded rubber material is carried out, so that an expensive apparatus for determining the conventional cutting position is used. Without cutting, the raw rubber lump a can be cut to obtain the amount of raw rubber required for one batch of kneaded rubber material. Therefore, the facility is simplified and the facility cost can be kept low.

  Moreover, even in the case of making a kneaded rubber material made of various types of raw material rubber, it is only necessary to increase the number of individual weighing conveyors 7, so that the equipment cost can be suppressed even in the case of multiple types.

  Furthermore, the material rubber lump a is simply cut into a group of rubber pieces b, and the material rubber lump that has become smaller due to the cutting is not handled. Is possible.

  Further, since the control device 11 indicates the number of raw rubber lumps a supplied by the raw rubber supply device 1 according to the total weight of the rubber pieces b remaining on the individual weighing conveyor 7, The amount of the rubber piece b remaining on the surface can be reduced, and the changeover work can be easily performed.

  In addition, since the changeover work is easy, it is possible to support a small lot production system, and the equipment cost for making kneaded rubber material made of various types of raw rubber can be reduced. Production can be realized at low equipment costs.

  In the present invention, in the raw rubber supply apparatus 1, the raw rubber lump a stored on the pallet 15 is supplied to the conveyor 13 by the supply means 17, but the operator may perform the work. In this case, it is preferable to display the order of supplying the raw rubber lump a on the display device installed near the operator from the control device 11.

  The individual weighing conveyor 7 is preferably a method of weighing with the weighing machine 25 as described above in order to increase weighing accuracy, but may be a loss-in-weight individual weighing conveyor.

  FIG. 2 shows a schematic view of an embodiment of the raw rubber charging device of the present invention. This feeding device is configured to feed and feed the raw rubber measured by the raw rubber cutting and weighing device of the present invention into the kneader 42, and the raw rubber cutting and weighing device shown in FIG. A heating chamber 40 is additionally provided. Although the stock space 41 shown in FIG. 1 is omitted, it is of course possible to provide it as it is.

  In this charging device, as described above, the batch of rubber pieces b ′ measured by the cumulative weighing conveyor 9 is stored in the charging container 33. The charging container 33 is moved to the heating chamber 40 and waits until the next kneading operation. In the heating chamber 40, the rubber piece b 'accommodated in the charging container 33 is heated to a preset temperature and maintained at that temperature.

  The set temperature is determined so that the compounding agent such as carbon kneaded with the rubber piece b ′ can be kneaded with good dispersion in the kneader 42, and varies depending on the outside air temperature, the rubber type, etc. For example, it is about 40 ° C to 50 ° C.

  The rubber piece b ′ having a large surface area due to the fragmentation can be immediately heated to the set temperature, and the temperature difference generated between the surface and the inside of each rubber piece b ′ becomes very small. Therefore, it can be heated almost uniformly.

  Along with the start of the kneading operation, one batch of the rubber piece b ′ heated to the set temperature is conveyed to the kneader 42 by a cart, hoist crane or the like while being accommodated in the charging container 33, The stored rubber piece b ′ is put into the kneader 42 and kneaded with the compounding agent. Since the rubber piece b 'is heated to an appropriate temperature, it can be kneaded with improved dispersibility of compounding agents such as carbon black, and a kneaded rubber with stable quality can be obtained in a short time.

  As described above, according to this raw material rubber charging device, it is possible to continuously and efficiently perform a consistent process from cutting, weighing, and charging into the kneader 42 of the bale-shaped raw rubber mass a.

  As described above, the small piece of rubber b 'is easily heated quickly, but when exposed to the outside air, the rubber temperature is easily changed due to the outside air temperature. It is preferable to arrange the kneading machine 42 close to each other. As a result, the time from leaving the heating chamber 40 to putting the rubber piece b ′ into the kneader 42 is shortened, the variation in transport time is reduced, and the variation in rubber temperature between batches can be reduced. it can.

  Also, a charging container 33 as illustrated in FIG. 3 can be used. The charging container 33 is configured to mount the raw rubber container 34 on the self-propelled device 36. The accommodating portion 34 has a top lid 34a, is configured as a box-like body having a bottom door 34b on the bottom surface, and is provided with a flange-like locking frame 34d protruding outward from the side wall 34c.

  On the side wall 34c and the bottom door 34b of the accommodating portion 34, a heating element 35a is disposed so as to be embedded in the surface or inside of the wall surface. As the heating element 35a, for example, a heating wire such as a nichrome wire having a large electric resistance is preferable. A battery 35c is connected as a power source for supplying power to the heating element 35a, and a controller 35b for controlling the amount of heat generated by the heating element 35a based on a detection signal of the temperature sensor 35d is provided. The controller 35b and the battery 35c are mounted on the self-propelled device 36 side.

  The heating element 35a extends in the circumferential direction on the side wall 34c of the accommodating portion 34 and is arranged so as to be divided into a plurality of bands in the vertical direction. Further, a temperature sensor 35d is arranged for each divided band. The controller 35b controls the amount of heat generated by each heating element 35a for each divided band based on the detection signal of the temperature sensor 35d for each band.

  In this embodiment, the heat generating battery 35c is also used for driving the self-propelled device 36. However, a separate battery independent of the heat generating battery 35c may be provided for the self-propelled device 36. . Further, the heat generating battery 35c and the controller 35b may be provided on the housing portion 34 side. Alternatively, the power source for heat generation may be input from the outside of the charging container 33. The heating element 35a may be provided mainly on the side wall 34c, but may be set at a required position of the bottom door 34b and the upper lid 34a.

  For example, the charging container 33 is covered with an upper lid 34a after receiving from the cumulative weighing conveyor 9 a batch of rubber pieces b 'each having a side of about 10 to 15 cm and broken into pieces of about 2 to 3 kg. And store. The size of the small rubber piece b 'is not limited to the above exemplary range.

  In accordance with the start of the kneading operation, the charging container 33 is automatically moved by the self-propelled device 36 on the conveying path installed up to the kneader 42 and stopped near the kneader 42. Alternatively, before the start of the kneading operation, the transfer path is unattended and waits near the kneader 42 in advance.

  Next, the accommodating portion 34 is lifted by a lifting tool such as a hoist crane, separated from the self-propelled device 36, and moved above the hopper portion of the kneader 42. Here, the locking frame 34d of the storage portion 34 is locked to a fixed frame (not shown), the bottom door 34b is opened by operating the opening / closing mechanism, and the stored rubber piece b 'is dropped onto the hopper portion. Supply to the kneader 42.

  For the rubber piece b 'housed in the housing portion 34, a rubber temperature at which the compounding agent as described above can be kneaded with good dispersion is set in advance, and this set temperature is input to the controller 35b. The controller 35b controls the heat generation amount of the heating element 35a by comparing the detection temperature based on the detection signal of the temperature sensor 35d with the set temperature, and the rubber piece b ′ so that the rubber temperature becomes the set temperature in the housing portion 34. Is heated and maintained at that temperature.

  The time required for the raw rubber to be charged from the raw rubber supply device 1 to the kneading machine 42 varies from batch to batch. Even when the time required for charging varies as described above, the temperature changes to the outside air temperature. Even in the case where there is, the above-mentioned charging container 33 is charged with the temperature of the rubber piece b 'for one batch being always kept at a set temperature, so that a compounding agent such as carbon black is good for the raw rubber. It is possible to carry out kneading by dispersing in the above. Thereby, uniform kneaded rubber having no quality variation in kneading between batches can be efficiently obtained in a short time.

  The rubber temperature in the housing part 34 varies slightly depending on the position of the housing part 34. Therefore, in this embodiment, the heating element 35a is divided into a plurality of bands in the vertical direction of the housing portion 34, and the amount of heat generated in each band of the heating element 35a is controlled by the controller 35b based on the detection signal of the temperature sensor 35d. Thus, the rubber piece b ′ can be heated so as to reach a substantially uniform target temperature in the entire housing portion 34.

  The heating element 35a is preferably divided in a direction in which a difference in the rubber temperature is likely to occur. In this embodiment, the side wall 34c of the accommodating portion 34 is divided into a plurality of zones in the vertical direction. In the case where there is almost no difference in the heating temperature in the housing portion 34 or when strict temperature control is not required, the heating element 35a can be configured without being divided into a plurality of zones.

  If the uniform and sufficient heating is possible, the upper lid 34a can be omitted. However, by providing the upper lid 34a, in addition to improving the heating effect, the upper lid 34a is extra in the accommodating portion 34 before being put into the kneader 42. Can prevent troubles caused by miscible materials.

  As in this embodiment, when the heating element 35a is divided into a plurality of zones and the control is performed so that the rubber temperature is made uniform throughout the housing portion 34, the rubber quality in one batch can be made uniform.

  Further, since the temperature of the charged rubber piece b ′ is kept substantially uniform throughout the accommodating portion 34, the amount of electric power required for kneading of the kneader 42 and the fluctuation of the mechanical load are reduced, and equipment maintenance is achieved. It will also be good.

  The housing portion 34 may be structured so that the bottom surface does not open, and the housing portion 34 may be inclined to supply the rubber piece b ′ from the upper opening. However, as in this embodiment, the bottom surface is opened and supplied. Thus, it is possible to minimize the adhesion of the rubber piece b ′ to the inner surface of the accommodating portion 34 and prevent the remaining supply of the accommodated rubber piece b ′.

  In order to prevent the remaining supply of the rubber piece b ′, the inner surface of the housing part 34, that is, the inner surface of the side wall 34c of the housing part 34 and the inner surface of the bottom door 34b, is processed to prevent adhesion to the rubber piece b ′ such as a fluororesin coating. It is preferable to keep it.

  Alternatively, the charging container 33 may be transported to the kneader 42 using a general cart, a hoist crane, or the like without providing the self-propelled device 36.

It is the schematic which shows one Embodiment of the raw material rubber | gum cutting / metering apparatus of this invention. It is the schematic which shows one Embodiment of the injection device of the raw rubber of this invention. It is a side view which shows an example of the container for injection of FIG. It is a perspective view which illustrates the accommodating part of the container for injection of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Raw rubber supply device 3 Cutting device 5 Sorting device 7 Individual weighing conveyor 9 Cumulative weighing conveyor 11 Control device 12 Fractional storage cart 33 Input container 34 Storage portion 34a Top lid 34b Bottom door 34c Side wall 34d Locking frame 35a Heating element 35b Controller
35c battery 35d temperature sensor 36 self-propelled device 40 heating chamber 42 kneading machine a lump of raw rubber b, b 'rubber pieces

Claims (10)

  A method of cutting and weighing raw rubber to obtain a batch of kneaded rubber material, wherein a rubber having a weight equal to or less than an error tolerance is obtained by cutting a raw rubber lump supplied by a raw rubber supply device with a cutting device. Dividing into a group of pieces, the group of rubber pieces is distributed to individual weighing conveyors for each type of raw rubber by a sorting device, and the weight of the rubber pieces is measured by each individual weighing conveyor to be required for one batch of kneaded rubber material A raw rubber cutting and weighing method that removes rubber pieces according to weight.   In the step of supplying a lump of raw rubber to the cutting device by the raw rubber supply device, if a rubber piece remains on the individual weighing conveyor, a control device according to the total weight of the remaining rubber piece 2. The raw rubber cutting and measuring method according to claim 1, wherein the raw rubber supply device specifies the number of raw rubber lumps to be supplied.   The raw rubber is cut and fed to the cumulative weighing conveyor, and the total weight of the rubber pieces that are conveyed from the individual weighing conveyor by the cumulative weighing conveyor to become one batch is measured. Weighing method.   A raw material to be charged by charging a batch of measured rubber pieces into a charging container, heating the rubber pieces to a preset temperature, feeding to a kneader by the method according to claim 3 How to add rubber.   A raw rubber cutting / metering device for obtaining a batch of kneaded rubber material, a raw rubber supply device for supplying the raw rubber lump, and cutting the raw rubber lump to an error tolerance or less A cutting device that divides the rubber pieces into a group of weights, a sorting device that distributes the group of rubber pieces for each type of raw rubber, and an individual weighing conveyor that can measure the weight of the rubber pieces for each type of raw rubber Raw material rubber cutting and weighing device.   6. The raw rubber cutting and metering according to claim 5, further comprising a control device that indicates the number of raw rubber lumps supplied by the raw rubber supply device according to the total weight of rubber pieces remaining on the individual weighing conveyor. apparatus.   The raw rubber cutting and weighing device according to claim 5 or 6, further comprising a cumulative weighing conveyor capable of weighing a total weight of rubber pieces carried out from the individual weighing conveyor into one batch.   The raw rubber cutting and weighing device according to claim 7, a charging container for storing one batch of rubber pieces weighed by the cumulative weighing conveyor, and a rubber piece stored in the charging container are set in advance. A raw rubber charging device comprising a heating means for heating to a temperature and a transport means for transporting the warmed rubber piece to the kneader by the charging container.   The raw rubber charging device according to claim 8, wherein the heating means is provided in the charging container.   The storage portion of the charging container is configured as a box-like body having a bottom door on the bottom, and the heating means detects the temperature of the heating element provided at least on the side wall of the storage portion and the temperature of the stored rubber piece. The raw material according to claim 9, comprising a temperature sensor and a controller that controls the amount of heat generated by the heating element based on a detection signal of the temperature sensor, and the conveying means is a self-propelled device on which the charging container is mounted. Rubber charging device.

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