JP2008302537A - Mold structure and its pushing-out/pulling-out method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop and provide a mold structure capable of improving the quality of products, reducing the manufacturing cost for the product, and improving the durability/operability/stability of the product, and its pushing-out/pulling-out method. <P>SOLUTION: The mold structure is composed by integrally assembling a guide block, a separated slide block and a vertical slide rod, the guide block is provided with an inclined slide part at one end and a recessed part at the other end respectively, the separated slide block is composed of three blocks of two kinds of slide block provided so as to two stage move in the inclination direction, and vertically and horizontally movable separated vertical/horizontal slide block. The mold structure is constituted so that the vertical slide block is provided with a horizontally sliding part on the upper part, and the lower part is provided by firmly fixing to a pushing plate part so as to vertically move by a predetermined dimension, and it can be pulled out without being interfered with a rib part of a product by a stepwise vertical/horizontal/inclined movement of the separated slide block locked at the upper end of the vertical slide rod in pushing out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mold structure and an extrusion / extraction method thereof.

  Conventionally, when installing a functional part such as a hooking claw on a plastic product, after injecting the plastic into the mold with an injection molding machine, open the mold when it is hardened, and then hook it when taking out the plastic product As for the shape of the nail, the nail portion is caught in the mold opening direction and cannot be taken out. Also, in order to give elasticity to the nail, the inside of the hook nail also has a bag shape, and in order to secure the height of the nail and the boss, a trapezoidal shape surrounded by walls in three directions is necessary. The space is also bag-shaped and cannot be removed. Therefore, in order to prevent this part from being caught, a plastic product is pushed out in the mold opening direction by a functional part different from the push pin, and the nail shape or bag is operated while operating in the direction perpendicular to the mold opening direction. It is necessary to pull out the part by an inclined slide method. This inclined slide system pushes the back side of the plastic product in the mold opening direction and operates while sliding the back side of the product also in the direction perpendicular to the mold opening direction. There was a possibility of getting stuck or getting damaged. Therefore, in order to prevent deformation due to the strength of the parts or shrinkage when the plastic hardens in the mold, it must be abolished even though it is a necessary part for plastic products. .

In addition, the boss is best to fix the sleeve pin to the mounting plate, fix the sleeve to the extrusion plate, and extrude the boss portion of the plastic product with the extrusion plate together with the extrusion plate. However, since the boss and claw shape function adjacent to each other, the inclined slide rod part interferes with the sleeve pin, and the sleeve pin can only be abolished and fixed.
When a fixed pin is used, the sleeve pushes out the boss part, whereas in the case of a fixed pin, the boss part is pulled out with an inclined slide or a push pin from another location. Since it is necessary, the accuracy as a positioning boss is deteriorated. In addition, the boss is torn off in the mold during molding, and troubles such as being impossible to remove unless the mold is disassembled occur.

  Further, the conventional slide system requires a structure in which a slide rail is processed between the upper extrusion plate and the lower extrusion plate and the slide block is sandwiched between them. In this structure, if the back surface of the plastic product is tilted, the tilt slide will also move in parallel with the tilt of the product back surface, and the block between the upper and lower extrusion plates must also move in parallel with the tilt of the product back surface. Inevitably, this slide rail also needs to be tilted. At this time, the length of the slide rail is the slide block + stroke portion. If the slide rail is tilted at this length, the thickness of the vertical push plate needs to be increased. Also, due to the grease, this part is prone to malfunction between the slide block and the rail. If the malfunction does not occur, the slide rod will operate at an angle. It was necessary to disassemble and periodically grind up the mold.

  Therefore, conventional plastic products can be set by simply pressing them with hooking claws and positioning bosses without using screw screws, etc., in order to attach them to the steel plate parts of various products. Therefore, it was necessary to abolish part of the reinforcing ribs and change the boss shape due to problems in the mold structure.

Here, the patent documents of the mold structure filed so far are introduced for reference. (See Patent Documents 1 and 2.)
JP 2004-31855 A JP 2006-062336 A

  Therefore, in order to solve the above problems, the present invention makes it possible to improve the quality of the product by making it possible to pull out the reinforcing rib portion provided on the back surface portion of the plastic product without cutting it, and the structure of the mold. Is to develop and provide a mold structure and its extrusion / removal method that can reduce the manufacturing cost and improve the durability, operability and stability.

  As means for solving this problem, a two-divided guide block, three types of divided slide blocks, and an upper and lower slide rod are integrally combined, and the two-divided guide block has a predetermined angle at one end. The slanted slide part and the other end are respectively provided with recesses adapted to the shape of the product base and the claw part, and the split type slide block is provided in such a manner that it can be moved two-stage in an oblique direction by a predetermined dimension. It consists of three types of split-type inclined slide blocks and split-type vertical / horizontal slide blocks provided so as to be vertically and horizontally movable by a predetermined dimension, and the vertical slide rod is a slide for horizontal movement at the top. A portion is provided, and a lower portion is fixed to the extruded plate portion so as to be vertically movable by a predetermined dimension.

  As an effect of the present invention, a two-divided guide block, three types of divided slide blocks, and an upper and lower slide rod are integrally combined, and the two-divided guide block has an inclined slide portion having a predetermined angle at one end. And the other end are provided with recesses suitable for the shape of the product base and the claw part, and the split type slide block is provided with two types of split type which can be moved in two stages obliquely by a predetermined dimension. It consists of three blocks, an inclined slide block, and a split type vertical / horizontal slide block that is provided so that it can move vertically and horizontally by a predetermined dimension, and the vertical slide rod is provided with a slide part for horizontal movement at the top, Since the lower part is fixed to the extruded plate part so that it can move up and down by a predetermined dimension, it is not necessary to cut out the reinforcing ribs to maintain the strength of the plastic product. There is an effect to improve the quality of, and is intended to achieve reduction and durability of the manufacturing cost by improving the structure of the mold itself, the operability, the improvement extremely beneficial Naru effect of maintenance property and lubrication property.

  As the best mode of the present invention, in order to improve quality, cost, performance, etc., standardization, standardization, and simplification of parts as much as possible, it is possible to form a structure that is simple and not easily broken by anyone. desirable.

  Therefore, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. A bag-like base having three surfaces surrounded by a plate wall is provided in the vertical direction of the upper back surface, and a bottom plate is provided on the lower surface of the base. A plastic product mold in which a latching hook claw and a positioning boss are provided side by side in the extraction direction and a reinforcing rib is provided in the bag-like extraction direction. The mold is mainly divided into two guides. A block (19a) (19b), a split slide block a (1a), b (1b), c (1c), and an upper and lower slide rod (2) are integrally combined, and the two-part guide block (19a) (19b) is a concave portion adapted to the shape of the inclined slide portion (SL3 ′) (SL3 ′) of a predetermined angle at one end and the base (8c) and claw portions (8a) (8b) of the product at the other end. And the split slide block a ( 1a), b (1b), and c (1c) are two types of divided inclined slide blocks a (1a) and b (1b) that are provided so as to be movable in two stages in a diagonal direction by a predetermined dimension, and predetermined dimensions. The upper and lower slide rods (2) are divided into three blocks, ie, a split type vertical / horizontal slide block c (1c) which is provided so as to be vertically and horizontally movable. And a lower part is fixed to the extruded plate part so as to be movable up and down by a predetermined dimension.

  Next, the structure of the present invention will be described in detail. First, the mold is mainly divided into two-divided guide blocks (19a) (19b) shown in FIGS. 4A, 4B, and 4C, and FIG. (B) (C) (D) The three types of divided slide blocks a (1a), b (1b), c (1c), and the upper and lower slide rods (2) are integrally combined, In addition, the two-divided guide block (19a) (19b) has an inclined slide portion (SL3 ′) (SL3 ′) adapted to the inclined slide portion (SL3) (SL3) of the split slide block a (1a) at one end. Are provided at the other end with recesses adapted to the shapes of the product base (8c) and the claw portions (8a) and (8b), and the split slide blocks a (1a), b (1b), c (1c) is a two-stage movement in a diagonal direction by a predetermined dimension The three types of divided type inclined slide blocks a (1a) and b (1b) provided in the same manner and the divided type vertical and horizontal slide blocks c (1c) provided so as to be vertically and horizontally movable by a predetermined dimension. It consists of blocks that are moved upward, horizontally, and diagonally in stages, and the split slide block completes extraction without interfering with the reinforcing ribs of the product.

  Next, the structure of the slide parts of the two-divided guide blocks (19a) (19b) and the split-type slide blocks a (1a), b (1b), and c (1c) will be described. A stopper (19a ') is fixed to one side of the slide portion 19a) with a socket bolt (B4), and the stopper hits the slide end surface and stops when it moves a predetermined dimension. In addition, stoppers (1a ′) (1b ′) having the same function as described above are also provided on one side of the slide parts in the inclined direction and the vertical direction of the divided slide blocks a (1a), b (1b), and c (1c). The socket bolts (B4) and (B4) are respectively fixed.

  FIG. 5 is a perspective view when the plastic product is viewed from the back side, and the reinforcing rib portion is not provided with the notch portion (C) provided in the conventional type, and the strength is increased.

  FIG. 6 is a partially omitted cross-sectional view showing a work process from the injection of the resin material (plastic) by the injection molding machine to the completion of the extrusion of the mold.

  Further, the mold extrusion / extraction method will be described in detail. The split-type slide block c (1c) locked to the upper end of the upper and lower slide rods (2) by pushing the molding machine extrusion rod (17) vertically upward. ) Rises vertically along the slide portions (SL1) (SL1 ′), and when the stopper (1b ′) reaches the lower end of the slide portion, the split slide block b (1b) moves along the inclined slide portion (SL2 ′). At the same time, the split slide block c (1c) is pulled in the extraction direction along the horizontal slide portion (SL4 ′) provided at the upper end of the slide rod (2). It moves until the stopper (1a ′) reaches the lower end of the inclined slide part (SL2 ′) of (1b), and from this point, While the split slide block a (1a) rises obliquely along the inclined slide portion (SL2 ′) of the guide block a (19a), the split slide block c (1c) further horizontally moves in the extraction direction at the same time. When (19a ') reaches the lower end of the slide portion (SL3') of the guide book (19a), the slide block c (1c) is completely extracted from the plastic product claw / boss bag portion (8c) and finally divided. The mold slide block c (1c) is moved up to the stroke end to complete the whole process.

  The other embodiment will be described with reference to FIG. 9. The upper back surface portion is provided in an inclined shape, and a bag-like base having three sides surrounded by a plate wall is provided along the inclined shape, and the lower surface of the base is provided. In a plastic product mold provided with a bottom plate, a hooking claw for locking and a positioning boss arranged in an inclined manner in the extraction direction, and a reinforcing rib in the extraction direction of the bag shape, the mold includes two Split guide block (19a ') (19b'), split slide block a '(1a'), b '(1b'), c '(1c'), and upper and lower slide rods (2 ") are integrated. The two-part guide block (19a ′) (19b ′) is formed by combining an inclined slide portion (SL7 ′) (SL7 ′) having a predetermined angle at one end and a product base (8c ″) at the other end. And recesses that match the shape of the claw (8a ") (8b") The split-type slide blocks a ′ (1a ′), b ′ (1b ′), and c ′ (1c ′) are provided in two types of divided blocks that are movable in two stages in a diagonal direction by a predetermined dimension. The mold-inclined slide block a ′ (1a ′) / b ′ (1b ′) and the split-type vertical / horizontal slide block c ′ (1c ′) provided so as to be movable up and down and horizontally by a predetermined dimension. The upper and lower slide rods (2 ″) are provided with a slide part (SL8) for horizontal movement at the upper part and fixed at the lower part to the extruded plate part so as to be movable up and down by a predetermined dimension. It consists of a mold structure.

  Further, the mold extrusion / extraction method will be described. By pushing up the molding machine extrusion rod (17) in the vertical upward direction, the divided inclined slide block a ′ () that is locked to the upper end of the upper and lower slide rods (2 ″). 1a ′), b ′ (1b ′), and c ′ (1c ′) are moved up and down in stages and tilted without interfering with the reinforcing rib (R ″) of the plastic product (PA ″). The detailed work process is the same as the above (0016).

  FIG. 7 shows a conventional type. Since the conventional type is a combination of an inclined slide rod (2 ′) and an integrated inclined slide block (1 ′), the fixed portion of the inclined slide rod (2 ′) is horizontally placed when the mold is pushed out. Since it must be slid in the direction, it becomes structurally complex, and the number of parts increases, which has an adverse effect on cost increase, malfunction and maintenance, and the integrated inclined slide block (1 ') reinforces the product As shown in FIG. 8, since it is necessary to cut out all the central portions of the ribs on the drawing direction side, the product quality is adversely affected.

  FIG. 8 is a perspective view of a conventional plastic product (PA ′) as viewed from the back side.

  The mold structure of the present invention and the method of extruding / extracting it can improve the quality of the product by making it possible to pull out the reinforcing rib provided on the back surface of the plastic product without cutting it out. In order to reduce the manufacturing cost and improve the durability, operability and stability by improving the structure, it has industrial applicability in terms of contributing to many plastic product manufacturing industries and mold markets.

1 shows an embodiment of the present invention and is a front sectional view. FIG. 1 shows an embodiment of the present invention and is a side sectional view. 1A shows an embodiment of the present invention, in which FIG. 3A is a front view, FIG. 3B is a cross-sectional view taken along the line aa in FIG. ) Of FIG. 3B, and FIG. 3D is a view of FIG. FIG. 4A is a partially cutaway front view of a guide block, FIG. 4B is a cross-sectional view taken along the line bb of FIG. 4A, and FIG. It is cc arrow sectional drawing of A). 1 shows an embodiment of the present invention and is a rear perspective view of a plastic product. FIG. It is an operation process sectional view showing an example of use of the present invention. It is sectional drawing which shows the prior art example of this invention and shows the process before and after metal mold | die extrusion and extraction. It is a back surface perspective view of a plastic product which shows the prior art example of this invention. It is sectional drawing which shows the other example of this invention and shows after metal mold | die extrusion and extraction.

Explanation of symbols

1a Split type inclined slide block a
1a 'Stopper 1a "Split type inclined slide block a"
1b Split type inclined slide block b
1b 'Stopper 1b "Split type inclined slide block b"
1c Split type vertical / horizontal slide block c
1c "Split type vertical / horizontal slide block c"
1 'Inclined slide block 2 Vertical slide rod 2' Inclined slide rod 2 "Vertical slide rod 3 Inclined slide block 4 Upper extruded plate 4 'Upper extruded plate 5 Lower extruded plate 5' Lower extruded plate 6 Sleeve pin 6 'Fixed pin 7 Boss Part 7 'boss part 8a nail part 8a' nail part 8b nail inner bag part 8b 'nail inner bag part 8c nail / boss bag part 8c' nail / boss bag part 9 back side template 9 'back side template 9 "back side Mold plate 10 Front side mold plate 11 Return pin 12 Molding machine upper mold mounting plate 13 Molding machine lower mold mounting plate 14 Spacer block 15 Guide pin 16 Molding machine injection nozzle 17 Molding machine extrusion rod 18 Molding machine mold mounting bracket 19a Guide Block a
19a 'Stopper 19b Guide block b
19b 'guide block b'
20 Sleeve 21 Guide pin B1 Socket bolt B2 Socket bolt B3 Socket bolt B4 Socket bolt C Notch PA Plastic product (new model)
PA 'Plastic products (conventional type)
PA ”Plastic products (new inclined type)
R Reinforcing rib R 'Reinforcing rib S Set screw SL1 Slide part (inner side)
SL1 'slide part (outer side)
SL2 slide part (inner side)
SL2 'slide part (outer side)
SL3 slide part (inner side)
SL3 'slide part (outer side)
SL4 slide part (inner side)
SL4 'slide part (outer side)
SL5 slide part (inner side)
SL5 'slide part (outer side)
SL6 slide part (inner side)
SL6 'slide part (outer side)
SL7 slide part (inner side)
SL7 'slide part (outer side)
SL8 slide part (inner side)
SL8 'slide part (outer side)

Claims (4)

  A bag-like base having three surfaces surrounded by a plate wall is provided in the vertical direction of the upper back surface, a bottom plate is provided on the lower surface of the base, and a hooking claw for locking and a positioning boss are juxtaposed in the extraction direction; and In a plastic product mold provided with reinforcing ribs in the bag-like extraction direction, the mold is mainly divided into a two-divided guide block (19a) (19b) and a split-type slide block a (1a), b (1b). ) · C (1c) and the upper and lower slide rods (2) are integrally combined, and the two-part guide block (19a) (19b) has an inclined slide portion (SL3 ′) (with a predetermined angle at one end). SL3 ′) and recesses adapted to the shape of the product base (8c) and the claw portions (8a) (8b) are provided on the other end, and the split slide blocks a (1a), b (1b), c (1c) is two steps in a diagonal direction by a predetermined dimension. Three types of divided-type inclined slide blocks a (1a) and b (1b) provided to be movable, and divided-type vertical and horizontal slide blocks c (1c) provided to be vertically and horizontally movable by a predetermined dimension. The upper and lower slide rods (2) are provided with a slide part (SL4) for horizontal movement at the upper part, and the lower part is fixed to the extruded plate part so as to be movable up and down by a predetermined dimension. Mold structure characterized by.   In the above-described mold extrusion / extraction method, at the time of mold extrusion / extraction, a split slide block locked to the upper end of the upper and lower slide rods (2) by pushing the molding machine extrusion rod (17) vertically upward. A (1a), b (1b), and c (1c) can be extracted without interfering with the reinforcing rib (R) of the plastic product (PA) by stepping up, down, horizontally, and tilting in stages. The method for extruding and extracting a mold according to claim 1, wherein the method is provided.   An upper back surface is provided in an inclined shape, and a bag-like base with three sides surrounded by a plate wall is provided along the inclined shape. A bottom plate is provided on the lower surface of the base, and a hooking claw for locking and a positioning boss are provided. In the plastic product mold in which the reinforcing ribs are provided in the bag-like extraction direction and the ribs for reinforcement are provided in the bag-like extraction direction, the mold is mainly divided into two divided guide blocks (19a ′) (19b ′). ), A split slide block a ′ (1a ′), b ′ (1b ′), c ′ (1c ′), and an upper and lower slide rod (2 ″), and the two split guide The blocks (19a ′) and (19b ′) have an inclined slide portion (SL7 ′) (SL7 ′) having a predetermined angle at one end and a product base (8c ″) and a claw portion (8a ″) (8b ″) at the other end. Each of the recessed slide blocks is provided with a recess adapted to the shape of '(1a'), b '(1b'), and c '(1c') are two types of divided inclined slide blocks a '(1a') that are provided so as to be movable in two stages in a diagonal direction by a predetermined dimension. · It consists of three blocks, b ′ (1b ′) and a split type vertical / horizontal slide block c ′ (1c ′) provided so as to be movable vertically and horizontally by a predetermined dimension, and the vertical slide rod (2 ″) ) Is a mold structure characterized in that a slide part (SL8) for horizontal movement is provided at the upper part, and the lower part is fixed to the extruded plate part so as to be movable up and down by a predetermined dimension.   In the above-described mold extrusion / extraction method, when the mold is extruded / extracted, the mold-type inclination is locked to the upper end of the upper / lower slide rod (2 ″) by pushing the molding machine extrusion rod (17) vertically upward. Reinforcement rib (R ") part of plastic product (PA") by sliding block a '(1a'), b '(1b'), c '(1c') moving up and down and tilting stepwise 4. The method for extruding and extracting molds according to claim 3, wherein the mold can be extracted without interfering with the mold.

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