JP2006044173A - Mold closing device in manufacturing line for foamed resin product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold closing device capable of letting an upper mold perform closing operation without generating a large load and increasing the speed of closing operation when manufacturing foamed resin products. <P>SOLUTION: In this device for clamping a molding mold 1 in which an upper mold 10 can be opened or closed against a lower mold 20 with a connecting part 11 at one side as a fulcrum and a rod body 15 is provided at the opposite side of the fulcrum, guide parts 5 which allow the rod body 15 to fit in and pass through in a travelling direction are provided on a rotary member 3 rotating along an orbit around the travelling part of the molding mold 1. During a period from the moment the rod body 15 located at a mold opening position a1 fits in a guide part 5 by the travelling of the molding mold 1 till the time when the rod body 15 passes the guide part 5, the rotary member 3 rotates in a mold closing direction to rotate the rod body 15 fitted in the guide part 5 to a closing position, thereby to close the upper mold 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mold closing device in a production line for foamed resin products such as cushion pads for seats.

  Conventionally, as in Patent Document 1 below, foamed resin products such as polyurethane seat cushion pads use a molding die that is divided into an upper mold and a lower mold, and the upper mold with respect to the lower mold. In a state where the mold is opened, the foamed resin material (foamed resin stock solution) is poured into the lower mold, and then the upper mold is closed with respect to the lower mold, and then the heated foam is formed by passing through the heating zone. It is manufactured through each process of opening the mold and taking out the molded product (foamed resin product).

  Usually, the above-mentioned series of molding dies is placed on a carriage, and the above-mentioned series is made for each molding die of each carriage while running along a predetermined production line at a constant interval. In general, a foamed resin product is molded and manufactured through the above steps.

  By the way, in the production line of the foamed resin product, the upper mold is automatically closed after the foamed resin material is injected into the lower mold.

  As the means, as shown in FIG. 6, the upper mold 110 of the molding die 101 is closed with a predetermined mold opening position a1 with a connecting portion 111 on one side as viewed from the lower mold 120 in the running direction. A rod body 115 for opening / closing operation is provided so as to be capable of opening / closing rotation with respect to the position a <b> 2 and projecting to the opposite side of the fulcrum of the upper mold 110. On the other hand, in the mold closing process, there is provided a mold closing device A ′ that causes the upper mold 110 mounted on the carriage or the like to travel and act on the rod 115 to perform the mold closing operation.

  As shown in FIG. 6, the conventional mold closing device A ′ moves from the mold opening position a1 to the mold closing position a2 outside the opening / closing rotation range of the upper mold 110, and further turns outward to move the U An endless rotating member 103 such as a chain that turns and returns to the original mold opening position a1 and reciprocally rotates along an arcuate track is provided, and the rod member of the upper mold 110 is provided on the rotating member 103. The guide part 105 through which the 115 can be inserted and passed is provided. When the rod 115 of the upper mold 110 in the mold opening position a1 is inserted into the guide part 105 by the running of the molding die 101, the rotation is performed. The upper mold 110 can be closed by moving the rod 115 to the mold closing position a2 by the rotation of the moving member 103.

However, in the case of the conventional mold closing device, the guide portion 105 for acting on the rod 115 protruding from the upper mold 110 to perform the mold closing operation is reciprocally rotated by the rotating member 103 along the arcuate track. Therefore, in particular, at the turn portions (reversal positions) at both end portions on the mold opening side and the mold closing side, the rotation is substantially 180 °. For this reason, the guide portion is greatly shaken outward by the centrifugal force when turning at the turn portion, and a large load is applied to the support portion and the rotating member. Thus, failure due to wear and damage of the support portion or the like is likely to occur, and the mold closing operation of the upper mold cannot be accelerated.
JP-A-11-277666

  In view of the above, the present invention allows foaming of a cushion pad for a seat or the like by sequentially passing through processes such as injection of a foamed resin material, mold closing, heating, mold opening, and molded product removal while the molding die is running. When manufacturing resin products, the upper mold can be closed without causing a large load by rotating in a fixed direction around the running part of the molding die, which speeds up the mold closing operation. It is an object of the present invention to provide a mold closing device capable of improving the production efficiency of foamed resin products.

  The mold closing device of the present invention that solves the above problems is a series of processes such as injection of a foamed resin material, mold closing, heating, mold opening, and taking out a molded product. In the mold closing process in the production line that is sequentially run and molds and manufactures the foamed resin product, the upper mold is provided to be openable and closable with the connecting part on one side as a fulcrum in the running direction with respect to the lower mold, A mold closing device for closing a molding die provided with a rod for opening and closing operations projecting to the opposite side of the fulcrum, along an annular track that goes around a running portion of the molding die An endless rotating member that rotates in turn is provided, and a guide portion that protrudes inward and that protrudes from the upper mold into the traveling direction and that passes through the guide member is provided at predetermined intervals on the rotating member. A plurality of the molds are provided, The upper mold body in the mold opening position is fitted into the guide part, and the rotating member is rotated in the mold closing direction until the bar body passes through the guide part. It is provided to move the inserted rod body to a mold closing position.

  According to this mold closing device, when the molding die traveling on the production line reaches the mold closing process, the rod member protruding from the upper mold side in the mold open state is disposed on the rotating member. The rotating member rotates in the mold closing direction until the rod body passes through the guide portion, and the rod body, that is, the upper mold is rotated to the mold closing position. Move to close the mold. Further, when the closing of the mold is completed and the rod passes through the guide portion, the guide portion is rotated in the same direction as it is by the rotating member, and is rotated around the traveling portion of the molding die. To the mold opening position. In this way, for each of the molding dies that are continuously run, the rod body for opening and closing operation is closed in the mold closing direction by the guide portion that is spaced from the back metal rotating member as described above. The upper die can be closed by moving to.

  In particular, at this time, the guide portion provided on the rotating member does not reciprocate between the mold opening position and the mold closing position as in the prior art, but is an annular shape that rotates around the traveling portion of the molding die. Because it rotates in the same direction along the trajectory, there is no large load like the turn part when reciprocating, and there is no failure due to wear or damage of the guide part or its support part. Suppressed and speeded up.

  In the mold closing device, the endless rotating member is provided with a plurality of guide portions at a pitch corresponding to an interval between the mold opening position and the mold closing position of the upper mold, and the rotating member is the guide. It is provided to rotate intermittently for each arrangement pitch of the parts, and to stop each guide part at a position corresponding to the mold opening position and a position corresponding to the mold closing position, respectively. Particularly preferred in practice.

  That is, when configured as described above, when one guide portion stops the rod body by moving the rod body to the mold closing position, the next guide portion is stopped at the mold opening position. Thus, the rod body of the molding die that is being run can be smoothly fitted into the guide portion, and the molds that are continuously run can be closed continuously.

  Further, the annular track around the running portion of the molding die, at least including the track portion from the mold opening position to the mold closing position, is mainly centered on a fulcrum for opening and closing the molding die. It is preferable to have a substantially circular orbit, so that the rotational movement is smooth, a large load is not generated, and wear damage is reduced.

  In the mold closing device, the upper mold and the lower mold of the molding die are respectively attached to a base frame for a lower mold and a base frame for an upper mold installed on a carriage. The underframe is provided so that it can be opened and closed with respect to the underframe for the lower mold with a connecting portion on one side as a fulcrum in the traveling direction, and the upper mold is opened and closed together with the underframe. Even in some cases, the mold can be closed as described above.

  As described above, according to the mold closing device of the present invention, while the molding die is running, the steps such as injection of the foamed resin material, mold closing, heating, mold opening, and molded product taking out are sequentially passed through, As a mold closing device equipped in the mold closing process when manufacturing foamed resin products such as cushion pads, the upper mold is closed without causing a large load by rotating in a fixed direction around the running part of the molding die. It can be operated, wear and damage can be suppressed, and the speed of the mold closing operation can be increased, thereby contributing to the improvement of the manufacturing efficiency of the foamed resin product.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a schematic plan view schematically showing the outline of the production line, and FIG. 2 is a schematic front view showing an outline of the mold closing device of the present invention in the mold closing process of the same production line. FIG. 3 is a schematic illustration of the guide portion.

  A production line 50 in FIG. 1 is a line for molding and producing a foamed resin product such as a cushion pad for an automobile seat, for example, and is a so-called circuit line that is continuously formed in an annular shape. A plurality of molding dies 1 composed of a mold are continuously traveled at regular intervals along the production line 50 by appropriate travel means, and each step provided along the line, that is, a foamed resin material An injection process 51 for injecting a stock solution (polyurethane or the like) into the lower mold, a mold closing process 52 for closing the upper mold relative to the lower mold, a heating process 53 for heating and foaming the foamed resin material, and opening the upper mold Then, a predetermined foamed resin product is formed and manufactured by sequentially passing through the steps such as the mold opening for taking out the foamed molded product (product) and the molded product taking out step 54.

  The mold closing device A of the present invention is installed in the mold closing process 52 in the production line 50. First, a basic configuration of the mold closing device A will be described with reference to FIG.

  As shown in FIG. 2, the molding die 1 to be closed includes an upper mold 10 and a lower mold 20 that are separately formed so as to be paired vertically, and the upper and lower molds 10, 20 are closed. In this state, the cavity 13 corresponding to the foamed resin molded product to be molded can be formed between both molds. The molding die 1 is mounted on a traveling base 2 and is caused to travel with the base 2 along the production line 50 by an appropriate traveling means (not shown). After going through the foaming resin material injection step 51, the mold closing step 52 is performed. Depending on the traveling means, only the molding die 1 may be traveled, and the base 2 may be configured to travel on a cart structure as will be described later.

  The upper mold 10 is provided so as to be capable of opening and closing with respect to the lower mold 20 with a connection portion 11 having a pin connection structure on one side as a fulcrum in the traveling direction. Usually, the upper mold 10 is provided so that it can be opened and closed between a mold opening position a1 and a mold closing position a2 of a predetermined angle, for example, about 90 ° to 120 ° with respect to the lower mold 20. Further, on the side of the upper mold 10, there is provided a bar body 15 for opening / closing operation that protrudes on the side opposite to the fulcrum, and the upper mold 10 is moved by moving the bar body 15 in the opening / closing direction. Can be opened and closed.

  Then, in the mold closing step 52, one direction along an annular orbit such as a substantially circular shape that rotates around the traveling portion of the molding die 1 in a plane orthogonal to the traveling direction of the molding die 1. A rotating member 3 such as an endless chain that rotates in the mold closing direction is provided. The annular track does not necessarily have to be a substantially circular track over the entire circumference, and most of the ring track includes at least a track portion from the mold opening position a1 to the mold closing position a2. Alternatively, it may be only a substantially circular track centering on a fulcrum for opening and closing the molding die 1. In this case, the length of the rotating member can be adjusted at a portion other than the substantially circular track, or can be driven by being connected to a driving means for rotating the rotating member. In any case, it goes without saying that a rotation guide (not shown) for rotating the rotation member 3 along the annular track is provided as necessary.

  The rotating member 3 protrudes inward of the annular track, opens inwardly and forwardly, and protrudes from the upper mold 10 so that the rod 15 is inserted in the running direction and passes therethrough. A plurality of substantially concave guide portions 5 that can be formed are provided at predetermined intervals in the longitudinal direction (rotation direction). For example, as shown in FIG. 3, when the rotating member 3 is composed of two endless chain members 3 a and 3 b that are parallel to each other in the running direction of the molding die 1, both chain members 3 a and 3 b The substantially concave guide portion 5 is provided between them, and a rod body 15 protruding from the upper die of the molding die 1 is fitted into the guide portion 5 in the direction of the arrow in FIG. It is provided so that it can pass through.

  Thereby, the travel of the molding die 1 causes the rod 15 of the upper mold 10 in the mold opening position to be fitted into the guide portion 5, and until the rod 15 passes through the guide portion 5. The rotating member 3 is rotated in the mold closing direction to move the rod 15 fitted in the guide portion 5 to the mold closing position, so that the upper mold 10 can be closed.

  The guide portion 5 has a pitch corresponding to the distance (moving distance) between the mold opening position a1 and the mold closing position a2 of the upper mold 10 in the longitudinal direction of the endless rotating member 3, and a plurality, especially 3 Arrange more than one. Thereby, when one guide part 5 is located in the mold closing position a2, the next guide part 5 is located in the mold opening position a1. Therefore, the entire length (length of one round) of the rotating member 3 is set to be a multiple of the pitch.

  Further, the rotating member 3 is provided so as to rotate intermittently for each arrangement pitch of the guide portions 5, and each guide portion 5 corresponds to the mold opening position a1 and the mold closing position. It is desirable to provide a reliable stop at the position corresponding to a2. That is, by configuring in this way, when one guide portion 5 is positioned corresponding to the mold closing position a2, the next guide portion 5 is stopped corresponding to the mold opening position a1, and is constant. The rod 15 of the molding die 1 traveling continuously at intervals can be smoothly inserted into the guide portion 5 at the mold opening position a1, and can be reliably passed and detached at the mold closing position a2. Become.

  The rotating member 3 is configured so that the guide portion of the rod body 15 of the molding die 1 depends on the traveling speed of the molding die 1 and the length of the guide portion 5 in the front-rear direction (traveling direction of the molding die). Although it is not possible to continuously rotate at a constant speed by matching the timing of insertion and passage with respect to the mold opening position a1 and mold closing position a2, in practice, it is intermittently rotated as described above. Is preferred.

  FIG. 4 shows a specific embodiment of the mold closing device A of the present invention basically configured as described above. In this embodiment, the molding die 1 composed of a pair of upper mold 10 and lower mold 20 that are separately formed so as to be openable and closable is mounted on a carriage 60 that runs on a track 56 along the production line 50. The upper mold 10 is provided so as to be openable and closable with respect to the lower mold 20 in the same manner as described above.

  That is, a lower mold base 27 is provided on a base plate 61 serving as a base of the carriage 60, and the lower mold 20 is fixed to the base 27, and the lower mold base 27, an upper mold frame 17 is provided so as to be capable of opening and closing with a connecting portion 16 having a pin coupling structure on one side as a fulcrum, and the upper mold 10 is fixed to the frame 17. Thus, the upper mold frame 17 opens and closes with respect to the lower mold frame 27 so that the upper mold 10 fixed thereto opens and closes with respect to the lower mold 20. It is configured. In addition, the upper die frame 17 is provided with a bar 15 for opening and closing, which protrudes on the opposite side to the fulcrum. The rod 15 can be projected from the upper mold 10 as in the case of the basic configuration described above, but in the case of FIG.

  Reference numeral 62 in the figure denotes a wheel for traveling the carriage 60, which has a tire structure. Reference numeral 63 denotes a guide roller that is fitted into and engaged with the traveling guide rail portion 64 of the carriage 60, and is provided so as to prevent a lateral shift laterally with respect to the traveling direction. Reference numeral 65 denotes an engagement protrusion for driving driving that protrudes from the side of the base plate 61 of the carriage 60. When the engaging member 58 provided on the driving means 57 such as a chain is engaged, the carriage 60 is provided to travel and move.

  Then, as a mold closing device A arranged in the mold closing process, a rotating member 3 such as a chain that rotates endlessly along an annular track that goes around the traveling portion of the molding die 1 by the carriage 60. Is provided.

  In particular, in this embodiment, most of the rotating member 3 including at least a track portion from the mold opening position a1 to the mold closing position a2 of the molding die 1 is for opening and closing the molding die 1. And a portion other than the substantially circular track portion 4a, for example, a portion of the track portion 4b on the lower side, detours downward from the substantially circular track portion 4a. It has a swollen orbit. In the part of the track portion 4b, the rotating member 3 is engaged with the sprocket 7 connected to the driving means 6 and the chain 6a, and the rotational power of the driving means 6 is transmitted via the sprocket 7. The rotating member 3 is transmitted so as to rotate in one direction. In the figure, reference numeral 8 denotes a turning guide portion of the turning member 3 in the substantially circular track portion 4a, and 9 denotes a frame.

  The rotating member 3 protrudes toward the inside of the annular track at locations at predetermined intervals in the longitudinal direction (rotating direction) (four locations in the figure), and opens inward and forward and backward. A substantially concave guide portion 5 is provided through which the rod 15 protruding from the upper mold 10 side (upper frame 17) can be fitted and passed in the running direction. Specifically, as described with reference to FIG. 3, when the rotating member 3 is composed of a pair of chain members 3 a and 3 b in parallel with an interval in the front and rear direction of the molding die 1 by the carriage 60, The chain members 3a and 3b are spanned and fixed. As shown in an enlarged view in FIG. 5, the guide portion 5 in FIG. 4 is provided with two brackets 5a and 5a facing each other at an interval in the rotation direction of the rotation member 3, and the two brackets 5a and 5a. Guide rods 5b and 5b are fixed in parallel to the opposite side edge portions, respectively, and are provided so that the rod body 15 can be fitted and passed through a space portion 5c between the guide rods 5b and 5b. .

  Particularly preferably, each of the guide portions 5 is disposed at a pitch corresponding to an interval (movement distance) between the mold opening position a1 and the mold closing position a2 of the upper mold 10, and the rotating member 3. However, the guide portions 5 are intermittently rotated at every arrangement pitch of the guide portions 5 so that the guide portions 5 are surely stopped at the mold opening position a1 and the mold closing position a2.

  According to the mold closing device A of this embodiment, the molding die 1 mounted on the carriage 60 and traveling on the track 56 along the production line 50 is subjected to the foaming resin material injection step 51 to the mold closing step 52. When it reaches (see FIG. 1), the bar 15 protruding from the upper mold 10 side (base frame 17) at the mold opening position a1 is formed on the guide portion 5 disposed on the rotating member 3. Insert. In particular, at this time, when the rotating member 3 that rotates intermittently is in a stopped state and the guide portion 5 is temporarily stopped at a position corresponding to the mold opening position a1, the rod body 15 is It can be surely and easily inserted into the guide portion 5. In the state where the rod 15 is inserted and engaged as described above, the rotating member 3 is moved by the travel of the molding die 1 until the rod 15 passes through the guide portion 5. It rotates in the mold closing direction, and the rod 15, that is, the upper mold 10 is rotated to the mold closing position a 2. That is, the upper mold 10 can be closed.

  Thus, when the closing of the mold is completed and the rod 15 passes through and separates from the guide part 5, the guide part 5 is directly rotated in the same direction by the rotating member 3, and the mold 1 The mold opening position a1 is reached by several mold closing actions.

  Further, when the guide part 5 is rotated to the mold closing position a2 as described above, the next guide part 5 is positioned corresponding to the mold opening position a1, and the mold opening that moves next is moved. The rod body 15 of the molding die 1 in the state is inserted in the same manner as described above, and the mold closing operation is performed by the rotation of the rotating member 3 as described above.

  In this way, it is possible to mechanically and efficiently close the mold 1 that is successively moved along the production line. In particular, the guide portion 5 provided on the rotating member 3 does not reciprocate between the mold opening position a1 and the mold closing position a2 as in the prior art, but around the traveling portion of the molding die 1. Since it rotates basically in the same direction along a substantially circular ring-shaped orbit, the guide portion 5 is greatly swung outward like a turn portion in the case of reciprocating rotation. As a result, a large load is not generated on the support part and the like, so that failure due to wear, damage, etc. can be suppressed, and the upper mold closing operation can be speeded up, which in turn increases the production efficiency of the foam resin product. It can be improved.

  The mold closing device of the present invention is suitable for closing the upper mold in the mold closing process after injecting the foamed resin material into the lower mold in the production line of various foamed resin products such as cushion pads for seats. Available.

It is an abbreviated plan view showing an outline of a production line typically. It is a schematic front view which shows the outline of the mold closing apparatus of this invention in the mold closing process of the same manufacturing line. FIG. 6 is a schematic explanatory diagram of a guide portion. It is the front view which notched a part which shows the specific Example of the mold closing apparatus of this invention. It is a partial expanded sectional view same as the above. It is a schematic front view which shows the outline of the conventional mold closing apparatus.

Explanation of symbols

A mold closing device a1 mold opening position a2 mold closing position 1 molding die 3 rotating member 3a, 3b chain member 4a substantially circular track portion 4b other partial track portion 5 guide portion 5a, 5a bracket 5b, 5b guide Bar 5c Spacing portion 6 Driving means 7 Sprocket 10 Upper mold 11 Connecting portion 15 Rod body for opening / closing operation 16 Connecting portion 17 Upper mold frame 20 Lower mold 27 Lower mold frame 50 Production line 51 Foamed resin material Injection process 52 Mold closing process 53 Heating process 54 Mold opening and molded product removal process 60 Cart 61 Platform plate

Claims (4)

Manufacturing that molds and manufactures foamed resin products by sequentially running a series of processes such as injection of foamed resin material, mold closing, heating, mold opening, and molded product removal. In the mold closing process in the line,
The upper die is formed so as to be capable of opening / closing with respect to the lower die as viewed in the traveling direction with a connecting portion on one side as a fulcrum, and is provided with a rod for opening / closing operation projecting on the opposite side of the fulcrum A mold closing device for closing a mold,
An endless rotating member that rotates along an annular track that runs around the running portion of the molding die is provided, and the rotating member protrudes inwardly on the upper mold side. A plurality of guide portions are provided at predetermined intervals through which the protruding rods can be fitted and passed in the running direction,
The rod of the upper mold in the mold opening position is fitted into the guide portion by running the molding die, and the rotating member rotates in the mold closing direction until the rod passes through the guide portion. Then, the mold closing device in the production line of the foamed resin product is provided so as to move the rod body fitted in the guide portion to a mold closing position.   The endless rotation member is provided with a plurality of guide portions at a pitch corresponding to the distance between the mold opening position and the mold closing position of the upper mold, and the rotation member is provided for each arrangement pitch of the guide portions. The said guide part is provided so that it may rotate intermittently and may each stop at the position corresponding to the said mold opening position, and a corresponding position with respect to a mold closing position. Mold closing device.   An annular track around the running portion of the molding die, at least including a track portion from the mold opening position to the mold closing position, is almost circular with a fulcrum for opening and closing the molding die as the center. The mold closing device according to claim 1, wherein the mold closing device is configured as follows. The upper mold and the lower mold of the molding die are respectively attached to a lower mold base and an upper mold base installed on a carriage traveling along a production line. A base frame is provided so as to be openable and closable with respect to the base frame for the lower mold as a fulcrum as viewed in the traveling direction, and the upper mold is opened and closed together with the base frame. Item 4. The mold closing device according to any one of Items 1 to 3.

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