JP2018202821A - Production device of paper container, production method of paper container and paper container - Google Patents

Abstract

To provide a production device of a paper container, a production method of a paper container and a paper container which can stably produce a paper container in mass production in a shorter time.SOLUTION: A molding device 13 of a production device 10 of a paper container 50 comprises a vertical movement device 14 and to the vertical movement device, first molds 21a, 21b being ruled line formation means and second molds 22a, 22b being blank sheet punching means and press means are attached, from an upstream side. Between the first molds and second molds, heating members 23a, 23b being heating means are arranged. From a supply device 11 to the molding device 13, base paper 57 is continuously supplied, and formation of a ruled line on a prescribed position by the first molds, heating processing on the prescribed position by the heating members, and punching of the blank sheet and molding into a container shape by the second molds, are performed synchronously in a supply order. Therefore, respective actuation times of the ruled line formation means and the heating means do not affect actuation times of the punching means and the press means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a paper container manufacturing apparatus, and in particular, a paper container manufacturing apparatus formed by at least a heating process and a subsequent molding process, a paper container manufacturing method using the paper container manufacturing apparatus, and the paper container The present invention relates to a paper container obtained by the manufacturing apparatus.

  FIG. 11 is a perspective view showing the external shape of a conventional paper container.

  Referring to the drawing, a paper container 70 includes a square bottom 71, a side wall 72 extending upward from the outer edge of the bottom 71, a corner 74 connecting the side walls 72, and the side wall 72 and the corner 74. It is comprised from the edge winding 73 formed in the outer edge. The paper container 70 is formed by press-molding one blank sheet.

  Such press-molded paper containers are advantageous for light weight and cost, and are mainly used for food storage. Various manufacturing apparatuses by press molding for manufacturing such paper containers have been proposed (for example, Patent Document 1).

  FIG. 12 is a schematic diagram showing a conventional paper container manufacturing apparatus, FIG. 13 is a schematic diagram showing a base paper processing step in the paper container manufacturing apparatus shown in FIG. 12, and (1) is a base paper It shows the state immediately after the supply position (B1), (2) shows the state immediately after the ruled line formation position (B2), and (3) shows the state immediately after the punching / pressing position (B3). It is shown.

  Referring to FIG. 12, a conventional paper container manufacturing apparatus 80 includes a supply device 81 for supplying a strip-shaped base paper 77 on the upstream side. A molding device 83 is disposed downstream of the supply device 81. The molding device 83 includes a pair of vertical movement devices 84, and a pair of first molds 91a and 91b and a pair of first molds on the upstream side. 2 molds 92a and 92b. Specific uses of each mold will be described later.

  With reference to FIG. 13, the manufacturing process of the conventional paper container 70 will be briefly described from the upstream side.

  First, the strip-shaped base paper 77 wound in a roll disposed at the base paper supply position B1 is continuously supplied from the supply device 81 to the ruled line formation position B2.

  Next, the supplied base paper 77 is ruled line 75 for absorbing wrinkles at the time of molding as shown in (2) of FIG. 13 by the first molds 91a and 91b of the molding apparatus 83 at the ruled line forming position B2. Are formed at predetermined positions. The base paper 77 on which the ruled line 75 is formed is then transferred to the punching / pressing position B3.

  Furthermore, as shown in FIG. 13 (3), the transferred base paper 77 is formed into a substantially square shape or the like by the second molds 92a and 92b of the molding apparatus 83 at the punching / pressing position B3. Is punched into the desired shape. Next, the blank sheet is press-molded into a container shape by the second molds 92a and 92b at the same position. In this flow, the paper container 70 is formed.

  In this conventional paper container manufacturing apparatus 80, the second mold is used to soften a part of the blank sheet before being press-molded into a container shape and improve the molding accuracy during press molding. Conventionally, a heating means is incorporated in 92a and 92b.

  14 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG.

  Referring to the drawing, the second molds 91a and 91b are provided with an upper mold member 93 and a lower mold member 94 which face each other. A lifting member 96 is disposed on the outer peripheral side of the upper mold member 93, and a heating member 97 made of a heater or the like is embedded therein. A curling member 98 is disposed on the outer peripheral side of the lower mold member 94.

JP 2011-212882 A

  The operation of the second molds 91a and 91b including the heating member 97 as described above is as follows.

  15 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG. 12, and is a view showing a state during the heating process, and FIG. 16 is shown in FIG. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the manufacturing apparatus of a paper container, Comprising: It is a figure which shows the state at the time of a formation process completion.

  First, referring to FIG. 15, the entire second mold 92a is lowered, and the base paper 77 on which the lower end surface of the elevating member 96 of the second mold 92a and the upper end surface of the curling member 98 are transferred is sandwiched for a certain period of time. Stop. At this time, since the elevating member 96 is heated by the heating member 97, a portion of the base paper 77 sandwiched between the lower end surface of the elevating member 96 and the upper end surface of the curling member 98 is heated. This heated portion includes a part of the ruled line 75 shown in FIG.

  Next, referring to FIG. 16, the elevating member 96 is further lowered so as to push down the curling member 98, and a blank sheet is punched out from the base paper 77 by a blade portion (not shown). Thereafter, the second mold 92a is further lowered at the position as it is, and the punched blank sheet is press-molded into a container shape by the pressure end surface of the upper mold member 93 and the pressure end surface of the lower mold member 94. After that, when the second mold 92a is raised further in the same position, the edge winding 73 is formed at the end of the pressed blank sheet by the curled groove 99 formed by the elevating member 96 and the curling member 98. The

  FIG. 17 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the forming means in the manufacturing process of the conventional paper container manufacturing apparatus as described above.

  Referring to the drawing, as described above, when forming a paper container, the heating process and the punching / pressing process (hereinafter referred to as “molding process”) are performed in one mold, so that heating is always performed. After the process is completed and the blank sheet is heated to a predetermined temperature, the process proceeds to the molding process. Then, when manufacturing one paper container, it takes time to add the operation time α of the heating means and the operation time β of the punching / pressing means (hereinafter referred to as “forming means”).

  In the case of continuously forming a plurality of containers, the heating process of the subsequent paper container (container 2) is started after the forming process of the previous paper container (container 1) is completed. For each, the operating time α of the heating means and the operating time β of the forming means are necessarily required. Therefore, when manufacturing n paper containers, it can be said that a time T obtained by multiplying the total of the operation time α of the heating means and the operation time β of the forming means by the number n of paper containers is necessarily taken.

  Here, when it is desired to form more paper containers in a short time, for example, it is conceivable to shorten the operating time α of the heating means and the operating time β of the forming means. However, the minimum time required to manufacture a paper container of a certain quality is naturally determined depending on the material to be pressed and the configuration of the mold for processing. If the heating process and the molding process are not performed over an appropriate time, the molding accuracy at the time of molding tends to be lowered, and as a result, the possibility of producing a defective product increases.

  The present invention has been made to solve the above-described problems, and provides a paper container manufacturing apparatus, a paper container manufacturing method, and a paper container capable of stably mass-producing paper containers in a shorter time. With the goal.

  In order to achieve the above object, the invention described in claim 1 is a paper container manufacturing apparatus formed by at least a heating step and a subsequent molding step, and heating means for performing the heating step; The apparatus comprises a transfer means for transferring the object to be pressed processed by the heating means, and a forming means for carrying out a forming process on the transferred object to be pressed. It operates in a time zone including at least a part of.

  If comprised in this way, at least one part of the operation time zone of a heating means and the operation time zone of a shaping | molding means will overlap.

  The invention according to claim 2 is an apparatus for manufacturing a paper container by press molding, a heating means capable of heating a base paper including a blank sheet of a desired shape, a transfer means for transporting the heated base paper, A blank sheet acquisition unit that acquires a blank sheet from the transferred base paper, and a press unit that presses the acquired blank sheet, and the heating unit includes at least an operation time zone of the blank sheet acquisition unit and the press unit. It operates in a time zone including a part.

  If comprised in this way, at least one part of the operation time zone of a heating means and the operation time zone of a blank sheet acquisition means and a press means will overlap.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the heating means operates within the operation time of the blank sheet obtaining means and the pressing means.

  If comprised in this way, the time used for the action | operation of a heating means will not affect the manufacturing time of the paper container by a blank sheet acquisition means and a press means.

  The invention according to claim 4 is an apparatus for manufacturing a paper container by press molding, wherein the base paper supply means for supplying the strip-shaped base paper and the wrinkles at the time of molding are absorbed in the corresponding positions of the supplied base paper A ruled line forming means for forming a ruled line, a first transfer means for transferring the base paper on which the ruled line is formed, a heating means for heating the transferred base paper, a second transfer means for transferring the heated base paper, and A blank sheet punching means for punching a blank sheet having a desired shape including at least a part of the formed ruled line from the raw paper, and a pressing means for pressing the punched blank sheet at that position, thereby forming a ruled line. The time required for the processing in each of the means and the heating means is the same as the time required for the processing in the blank sheet punching means and the pressing means, and the first transfer means and the second transfer means Is to operate synchronously.

  If comprised in this way, the time used for the action | operation of a ruled line formation means and a heating means will not influence the press time of the paper container by a blank sheet punching means and a press means.

  The invention according to claim 5 is a method for manufacturing a paper container, and the paper container is manufactured by using the paper container manufacturing apparatus according to any one of claims 1 to 4.

  If comprised in this way, at least one part of the operation time zone of a heating means and the operation time zone of a shaping | molding means will overlap.

  A sixth aspect of the present invention is a paper container, which is obtained by the paper container manufacturing apparatus according to any one of the first to fourth aspects.

  If comprised in this way, at least one part of the operation time zone of a heating means and the operation time zone of a shaping | molding means will overlap.

  As described above, in the invention according to claim 1, since at least a part of the operating time zone of the heating means and the operating time zone of the forming means overlap, the manufacturing time of the paper container is substantially shortened, Production efficiency is improved.

  In the invention of claim 2, since at least a part of the operation time zone of the heating means and the operation time zone of the blank sheet acquisition means and the press means overlap, the manufacturing time of the paper container is substantially shortened, Efficiency is improved.

  In addition to the effect of the invention of claim 2, the invention of claim 3 does not affect the manufacturing time of the paper container by the blank sheet acquisition means and the press means, in addition to the effect of the operation of the heating means, Production efficiency is further improved.

  In the invention according to claim 4, since the time used for the operation of the ruled line forming means and the heating means does not affect the press time of the paper container by the blank sheet punching means and the pressing means, the quality and the production efficiency of the paper container. Will improve.

  In the invention according to claim 5, since at least a part of the operating time zone of the heating means and the operating time zone of the forming means overlap, the paper container manufacturing time is substantially shortened and the production efficiency is improved. A container can be manufactured.

  According to the sixth aspect of the present invention, at least a part of the operating time zone of the heating means and the operating time zone of the forming means overlap, so that the paper container manufacturing time is substantially shortened and the production efficiency is improved. It becomes a container.

It is the schematic which shows the manufacturing apparatus of the paper container by 1st Embodiment of this invention. It is the manufacturing apparatus of the paper container shown in FIG. 1, Comprising: It is the schematic which shows the state in press work. It is a schematic diagram which shows the processing process of the base paper in the manufacturing apparatus of the paper container shown in FIG. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the manufacturing apparatus of the paper container shown in FIG. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the paper container manufacturing apparatus shown in FIG. 1, Comprising: It is a figure which shows the state in the punching process. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the paper container manufacturing apparatus shown in FIG. 1, Comprising: It is a figure which shows the state at the time of completion of shaping | molding. It is a schematic diagram which shows the relationship between the operation time of a ruled line formation means, the operation time of a heating means, and the operation time of a shaping | molding means in the manufacturing process with the paper container manufacturing apparatus by 1st Embodiment of this invention. It is a schematic diagram which shows the relationship between the operation time of a heating means and the operation time of a shaping | molding means in the manufacturing process with the manufacturing apparatus of the paper container by 1st Embodiment of this invention. It is a schematic diagram which shows the relationship between the operation time of a heating means and the operation time of a shaping | molding means in the manufacturing process with the manufacturing apparatus of the paper container by 2nd Embodiment of this invention. It is a schematic diagram which shows the relationship between the operation time of a heating means and the operation time of a shaping | molding means in the manufacturing process with the manufacturing apparatus of the paper container by 3rd Embodiment of this invention. It is a perspective view which shows the external appearance shape of the conventional paper container. It is the schematic which shows the manufacturing apparatus of the conventional paper container. It is a schematic diagram which shows the process of the base paper in the manufacturing apparatus of the paper container shown in FIG. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the manufacturing apparatus of the paper container shown in FIG. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the manufacturing apparatus of the paper container shown in FIG. 12, Comprising: It is a figure which shows the state in a heating process. It is a schematic sectional drawing of the part containing the 2nd metal mold | die of the paper container manufacturing apparatus shown in FIG. 12, Comprising: It is a figure which shows the state at the time of completion of shaping | molding. It is a schematic diagram which shows the relationship between the operation time of a heating means and the operation time of a shaping | molding means in the manufacturing process with the manufacturing apparatus of the conventional paper container.

  FIG. 1 is a schematic view showing a paper container manufacturing apparatus according to a first embodiment of the present invention.

  Referring to the drawing, first, a paper container 50 manufactured by the paper container manufacturing apparatus 10 according to this embodiment has the same configuration as the conventional paper container 70 shown in FIG.

  Further, the paper container manufacturing apparatus 10 according to this embodiment includes a supply apparatus 11 for a base paper 57 similar to a conventional one as a base paper supply means on the upstream side, and a molding apparatus 13 on the downstream side. ing. The molding apparatus 13 includes a pair of vertical movement devices 14, a pair of first molds 21 a and 21 b serving as ruled line forming means for the base paper 57 on the upstream side, and blank sheet punching of the base paper 57 on the downstream side. A pair of second molds 22a and 22b, which are a pulling means and a pressing means, are respectively attached.

  A pair of heating members 23a and 23b made of a heater or the like as a heating means for the base paper 57 are disposed between the first molds 21a and 21b and the second molds 22a and 22b.

  The operation of the paper container manufacturing apparatus 10 of this embodiment will be described in order from the upstream side.

  FIG. 2 is a schematic diagram showing the state of the paper container manufacturing apparatus shown in FIG. 1 during press working. FIG. 3 is a schematic diagram showing the processing steps of the base paper in the paper container manufacturing apparatus shown in FIG. 1, wherein (1) shows a state immediately after the base paper supply position (A1). ) Shows the respective states from the ruled line formation position (A2) to the punching / pressing position (A3), and (3) shows the state immediately after the punching / pressing position (A3).

  Referring to these drawings, first, a belt-like base paper 57 wound in a roll disposed at a base paper supply position A1 is subjected to a surface coating process or the like by the supply device 11, and then downstream of the supply device 11. Is continuously supplied to the molding apparatus 13.

  Next, the supplied base paper 57 is used for absorbing wrinkles during molding as indicated by A2 in FIG. 3 (2) by the first molds 21a and 21b at the ruled line forming position A2 of the molding apparatus 13. Ruled lines 55 are formed at predetermined positions. The base paper 57 on which the ruled lines 55 are formed is then transferred to a heating processing position H by a first transfer means (not shown).

  Further, the transported base paper 57 is sandwiched between the heating members 23a and 23b at the heating processing position H. Thereby, in H of (2) of FIG. 3, the substantially whole part of the substantially square shape including the ruled line 55 as shown by a two-dot chain line is heated. By doing so, a wider range is heated than in the conventional heating process, which leads to an improvement in molding accuracy during the subsequent punching / pressing process. The heated base paper 57 is then transferred by a second transfer means (not shown) to the punching / pressing position A3.

  Further, the transported base paper 57 is first blank sheet heated at the punching / pressing position A3 by the second molds 22a and 22b as shown in A3 and (3) of (2) of FIG. 58 is punched into a desired shape such as a substantially square shape including at least a part of a ruled line as indicated by a broken line. Next, at the position as it is, the blank sheet 58 punched out is pressed into a container shape by the second molds 22a and 22b, and the paper container 50 is formed.

  At this time, the time required for processing in each of the first molds 21a and 21b as the ruled line forming means and the heating members 23a and 23b as the heating means is the second mold 22a as the blank sheet punching means and the pressing means. 22b is the same as the time required for processing.

  As described above, the ruled line forming means, the heating means, and the punching / pressing means operate at independent positions. However, the first molds 21a, 21b and the second molds 22a, 22b are attached to the pair of vertical movement devices 14, and the heating members 23a, 23b are formed of the first molds 21a, 21b and the second mold 22a, 22b, and each means operates synchronously. Further, the entire transfer means including the first transfer means and the second transfer means also operate in synchronization with each other. In the paper container manufacturing apparatus 10 as a whole, synchronized ruled line formation, heating, punching / pressing and processing steps are synchronized with the transfer steps synchronized with each other.

  Here, the specific operation of the second molds 22a and 22b at the punching / pressing position A3 of the paper container manufacturing apparatus 10 in this embodiment is as follows.

  FIG. 4 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG.

  Referring to the drawing, the second molds 22a and 22b according to this embodiment are configured by removing the heating member 97 from the conventional second molds 92a and 92b shown in FIG. 13, and the other members are conventional. Since the second molds 92a and 92b are the same, the description thereof will not be repeated.

  FIG. 5 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG. 1 and shows a state during the punching process.

  Referring to the figure, the second mold 22a is lowered from the state of FIG. At that time, the transported base paper 57 is already heated by the heating members 23a and 23b. Therefore, the elevating member 36 and the curling member 38 of the second molds 22a and 22b sandwiching the base paper 57 do not need to be stopped for a certain period of time as in the prior art for heating the base paper 57, and continue to descend as it is. A blank sheet 58 is punched from 57.

  FIG. 6 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG. 1 and shows a state when the molding is completed.

  Referring to the drawing, the second mold 22a is further lowered from the position where the blank sheet 58 is punched out, and the blank sheet 58 punched out includes the pressing end surface of the upper mold member 33 of the second mold 22a and the second mold. It is press-molded into a container shape by the pressure end face of the lower mold member 34 of the mold 22b. After that, when the second mold 22a is raised further in the same position, the curl formed by the elevating member 36 and the curling member 38 of the second molds 22a and 22b at the end of the pressed blank sheet 58. An edge winding 53 is formed by the groove 39.

  FIG. 7 is a schematic diagram showing the relationship among the operating time of the ruled line forming means, the operating time of the heating means, and the operating time of the forming means in the manufacturing process of the paper container manufacturing apparatus according to the first embodiment of the present invention. It is.

  In FIG. 7, the description of the operation time of the first transfer means and the second transfer means is omitted.

  With reference to the figure, as described above, the operation time γ of the ruled line forming means derived from the time required for processing in the ruled line forming means, and the operation time α of the heating means derived from the time required for processing in the heating means, Is the same as the operation time β of the forming means, which is the time required for processing in the blank sheet punching means and the pressing means (hereinafter referred to as “forming means”). The ruled line forming process, the heating process, and the punching / pressing process (hereinafter referred to as “forming process”) operate in synchronization with each other.

That is, when the part related to the paper container (container 1) ahead of the base paper undergoes the ruled line forming process and the heating process and starts the forming process, the part related to the paper container (container 2) after the base paper is the heating process Will start. Further, the portion related to the paper container (container 3) after the base paper starts the ruled line forming process. Then, when the first paper container is manufactured, it takes time to add the operation time γ of the ruled line forming means, the operation time α of the heating means, and the operation time β of the forming means. When continuously forming a plurality of paper containers, the heating process of the container 2 and the ruled line forming process of the container 3 are performed during the molding process of the container 1, and after the molding process of the container 1 is completed, The forming process and the heating process of the container 3 are started. As a result, when the second and subsequent paper containers are manufactured, substantially only the operating time β of the forming means is required. Therefore, when manufacturing n number of paper containers, to the addition of the operation time γ of the ruled line forming means of the first container, the operation time α of the heating means, and the operation time β of the forming means, It can be said that T ₁ is obtained by further adding the time obtained by multiplying the operation time β of the forming means by the number of the second and subsequent paper containers (n−1).

  In this way, in the overall manufacturing time, the operation time γ of the ruled line forming means and the operation time α of the heating means do not affect the operation time β of the forming means, so that the quality and production efficiency of the paper container are improved. It will be a thing.

  For comparison with the conventional manufacturing apparatus, only the operating time α of the heating means and the operating time β of the forming means will be extracted and further described.

  FIG. 8 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the forming means in the manufacturing process of the paper container manufacturing apparatus according to the first embodiment of the present invention.

Referring to the figure, when the part related to the paper container (container 1) ahead of the base paper undergoes the heating process and starts the forming process, the part related to the paper container (container 2) after the base paper is the heating process. Will start. Then, when the first paper container is manufactured, it takes time to add the operating time α of the heating means and the operating time β of the forming means. When molding, the heating process of the container 2 is performed during the molding process of the container 1, and the molding process of the container 2 and the heating process of the container 3 are started after the molding process of the container 1 is completed. As a result, when the second and subsequent paper containers are manufactured, substantially only the operating time β of the forming means is required. Therefore, the time T ₂ required for manufacturing n paper containers is the sum of the operating time α of the heating means of the first container and the operating time β of the forming means, plus the operating time of the forming means. It can be said that it takes a time obtained by adding a time obtained by multiplying β by the number (n−1) of the second and subsequent paper containers.

That is, the time T ₂ required for manufacturing n paper containers is:
T ₂ = (α + β) + β (n−1) = α + βn.

On the other hand, the time T shown in FIG.
T = n (α + β) = αn + βn.

Therefore,
T ₂ −T = (α + βn) − (αn + βn) = − α (n−1), and the relationship T ₂ = T−α (n−1) is derived therefrom.

  This means that the time required for the heating process of the second and subsequent paper containers is substantially unnecessary as compared with the conventional manufacturing apparatus, and as a result, it can be said that the time required for the entire manufacturing is shortened.

  Thus, even when only the heating means and the forming means are considered, the operating time α of the heating means does not affect the operating time β of the forming means in the overall manufacturing time, so that the production efficiency is further improved. It will be a thing.

  FIG. 9 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the forming means in the manufacturing process of the paper container manufacturing apparatus according to the second embodiment of the present invention.

  Note that the configuration of the paper container manufacturing apparatus according to the second embodiment is basically the same as that of the first embodiment, so the description thereof will not be repeated, and the differences will be mainly described. To do.

  Referring to the figure, the operating time α of the heating means according to the second embodiment is set longer than the operating time β of the forming means. With such a setting, the base paper is heated evenly by heating over time, and the softness and moisture that are more appropriate for molding are maintained, so that the molding accuracy of the paper container is further improved.

  For comparison with the conventional manufacturing apparatus, description of the operation time of the ruled line forming means is omitted, and the relationship between the heating means and the forming means will be described.

  First, when the part related to the paper container (container 1) ahead of the base paper starts the forming process through the heating process, the part related to the paper container (container 2) after the base paper starts the heating process. Is the same as in the first embodiment. As in the first embodiment, when the first paper container is manufactured, it takes time to add the operating time α of the heating means and the operating time β of the forming means.

  Next, when a plurality of paper containers are continuously formed, the heating process of the container 2 is started during the forming process of the container 1, but the operating time α of the heating means is longer than the operating time β of the forming means. Due to the length, the molding process of the container 2 does not start immediately after the molding process of the container 1 is completed, but waits for the heating process of the container 2 to be completed before the molding process of the container 2 and the heating process of the container 3. Is started. Therefore, a waiting time x occurs after the molding step, and the heating means operates at a time including at least a part of the operating time zone of the molding means.

  The time obtained by adding the waiting time x to the operating time β of the forming means is the same as the operating time α of the heating means.

As a result, when the second and subsequent paper containers are manufactured, it takes substantially the time obtained by adding the standby time x to the operating time β of the forming means. Therefore, the time T ₃ required for manufacturing n paper containers is obtained by adding the operating time α of the heating means of the first container and the operating time β of the forming means to the operating time β of the forming means. It can be said that it takes a time obtained by adding a time obtained by multiplying the time obtained by combining the waiting time x and the number of paper containers (n−1) after the second one.

That is, the time T ₃ required for manufacturing n paper containers is:
T ₃ = (α + β) + (β + x) (n−1) = (α + β) + α (n−1) = αn + β.

On the other hand, the conventional time T shown in FIG. 17 is the same as in the first embodiment.
T = n (α + β) = αn + βn.

Therefore,
_{T 3 -T = (αn + β} ) - (αn + βn) = - β (n-1) becomes, which relationship _{T 3 = T-β (n} -1) is derived from.

  This means that, in comparison with the conventional manufacturing apparatus, the time corresponding to the molding process is substantially unnecessary in the heating process of the second and subsequent paper containers, and as a result, the time required for the entire manufacturing process. Can be said to be substantially shorter than the conventional one.

  Thus, since at least a part of the operating time α of the heating means and the operating time β of the forming means overlap, the manufacturing time of the paper container is substantially shortened and the production efficiency is improved.

  FIG. 10 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the forming means in the manufacturing process of the paper container manufacturing apparatus according to the third embodiment of the present invention.

  Note that the configuration of the paper container manufacturing apparatus according to the third embodiment is basically the same as that of the first embodiment, so the description thereof will not be repeated, and the differences will be mainly described. To do.

  Referring to the figure, the operating time α of the heating means according to the third embodiment is set shorter than the operating time β of the forming means. Since the base paper tends to warm quickly with a large-capacity heater or the like, such a time adjustment may be performed in order to obtain a softness and water holding amount suitable for molding.

  For comparison with the conventional manufacturing apparatus, description of the operation time of the ruled line forming means is omitted, and the relationship between the heating means and the forming means will be described.

  First, when the forming step is performed on the portion related to the paper container (container 1) ahead of the base paper, the heating step is performed on the portion related to the paper container (container 2) after the base paper. Is the same as in the first embodiment. As in the first embodiment, when the first paper container is manufactured, it takes time to add the operating time α of the heating means and the operating time β of the forming means.

  Next, when a plurality of paper containers are continuously formed, the heating process of the container 2 is started during the forming process of the container 1, but the operating time α of the heating means is longer than the operating time β of the forming means. Since it is short, the heating process of the container 2 is performed from the middle of the molding process of the container 1 in accordance with the completion of the molding process. Similarly, the heating process of the container 3 is started from the middle of the molding process of the container 2. Therefore, the heating means operates within the operation time of the forming means.

As a result, when the second and subsequent paper containers are manufactured, the operation time β of the forming means is substantially longer than the operation time α of the heating means. Therefore, the time T ₄ required for manufacturing n paper containers is obtained by adding the operating time α of the heating means of the first container and the operating time β of the forming means to the operating time of the forming means. It can be said that it takes a time obtained by adding a time obtained by multiplying β by the number (n−1) of the second and subsequent paper containers.

That is, the time T ₄ required to manufacture n paper containers is
T ₄ = (α + β) + β (n−1) = α + βn.

On the other hand, the conventional time T shown in FIG. 17 is the same as in the first embodiment.
T = n (α + β) = αn + βn.

Therefore,
T ₄ −T = (α + βn) − (αn + βn) = − α (n−1), from which the relationship T ₄ = T−α (n−1) is derived.

  This means that the time required for the heating process of the second and subsequent paper containers is substantially unnecessary as compared to the conventional manufacturing apparatus, as a result of the overall manufacturing as a result. It can be said that the time required for is reduced.

  Thus, since at least a part of the operating time α of the heating means and the operating time β of the forming means overlap, the manufacturing time of the paper container is substantially shortened and the production efficiency is improved. In addition, in the overall manufacturing time, the operating time α of the heating means does not affect the operating time β of the forming means, so that the production efficiency is further improved.

  In each of the above-described embodiments, the object to be pressed has a configuration in which a strip-shaped base paper is punched into a blank sheet and is molded. However, if a paper container can be manufactured, acquisition of the object to be pressed is obtained. The means is not limited to this, and other methods may be used.

  In each of the above embodiments, the blank sheet is punched from the strip-shaped base paper. However, the present invention is not limited to this, and other methods such as a structure for preparing a blank sheet formed in a desired shape from the beginning. The structure provided with the blank sheet acquisition means which becomes.

  Furthermore, in each of the embodiments described above, the forming means is composed of the blank sheet punching means and the pressing means, but is not limited thereto. It may be composed of the blank sheet acquisition means and the press means as described above, or may be by another means as long as the heated material is processed to form a paper container. Good.

  Further, in each of the above-described embodiments, the heating means is provided independently for the molding before heating, and thus the heating means is not provided in the molding means. On the other hand, in order to add a heating process for the purpose of improving the shape retention after molding, a configuration may be adopted in which a heating member is also provided auxiliary to the molding means.

  Further, in each of the above-described embodiments, the heating process and the molding process are continuously performed. However, the present invention is not limited thereto, and the heating unit may be disposed in front of the ruled line forming unit. Moreover, it is good also as a structure which incorporates a heating means in a ruled line formation means.

  Further, in each of the above embodiments, the heating portion is performed on the entire substantially square shape. However, the present invention is not limited to this, and only a specific portion may be heated.

  Furthermore, in the third embodiment, the heating process is started in the time zone that matches the completion of the molding process from the middle of the molding process. However, the present invention is not limited to this. It is good also as a structure which starts a shaping | molding process and a heating process simultaneously, and waits until a shaping | molding process is started, if it heats for a fixed time.

  Further, in each of the above-described embodiments, the first mold that is the ruled line forming means and the second mold that is the forming means are attached to the pair of vertical movement devices, and the heating that is the heating means disposed between them. Although the member was an independent structure, it is not restricted to this. The heating member may also be attached to the vertical movement device, or conversely, each means may be attached to an independent movement device.

  Further, each of the above embodiments relates to a paper container manufacturing apparatus. However, the embodiment of the method for manufacturing a paper container using the paper container manufacturing apparatus of each of the above embodiments may be used. The same applies.

  Further, each of the above embodiments relates to a paper container manufacturing apparatus, but the present invention can be similarly applied to a paper container obtained by the paper container manufacturing apparatus of each of the above embodiments. .

DESCRIPTION OF SYMBOLS 10 ... Paper container manufacturing apparatus 11 ... Supply apparatus 21a, 21b ... 1st metal mold | die 22a, 22b ... 2nd metal mold | die 23a, 23b ... Heating member 50 ... Paper container 55 ... Ruled line 57 ... Base paper In addition, the same code | symbol in each figure Indicates the same or corresponding parts.

Claims (6)

An apparatus for manufacturing a paper container formed by at least a heating step and a subsequent molding step,
Heating means for carrying out the heating step;
Transfer means for transferring the object to be pressed processed by the heating means;
Forming means for performing the forming step on the transferred object to be pressed,
The apparatus for manufacturing a paper container, wherein the heating unit operates in a time period including at least a part of an operation time period of the forming unit. An apparatus for producing a paper container by press molding,
A heating means capable of heating a base paper containing a blank sheet of a desired shape;
Transfer means for transferring the heated base paper;
Blank sheet acquisition means for acquiring the blank sheet from the transferred base paper,
Press means for pressing the acquired blank sheet,
The said heating means is a paper container manufacturing apparatus which operate | moves in the time slot | zone including at least one part of the operation time slot | zones of the said blank sheet acquisition means and the said press means.   The paper container manufacturing apparatus according to claim 2, wherein the heating unit operates within an operation time of the blank sheet acquisition unit and the press unit. An apparatus for producing a paper container by press molding,
A base paper supply means for supplying strip-shaped base paper;
Ruled line forming means for forming a ruled line for absorbing wrinkles at the time of molding at a corresponding position of the supplied base paper,
First transport means for transporting the base paper on which the ruled lines are formed;
Heating means for heating the transferred base paper;
A second transfer means for transferring the heated base paper;
Blank sheet punching means for punching out a blank sheet of a desired shape including at least a part of the formed ruled line from the transferred base paper,
A press means for pressing the punched blank sheet at that position;
The time required for processing in each of the ruled line forming means and the heating means is the same as the time required for processing in the blank sheet punching means and the pressing means, and the first transfer means and the second transfer A paper container manufacturing apparatus that operates in synchronization with the means.   A method for manufacturing a paper container, wherein the paper container is manufactured using the paper container manufacturing apparatus according to any one of claims 1 to 4.   A paper container obtained by the paper container manufacturing apparatus according to any one of claims 1 to 4.

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