KR920005552B1 - Mould - Google Patents

Abstract

The apparatus assembles mould modules standardized corresponding to the product size, and reduces preparation time for the plastic injection moulding. The assembling apparatus comprises a fixed core (3) forming a half cavity (2a), an inlet passageway (7), and a plurality of inlet holes (7a); a driving core (4) having a cavity (26) correspondent to the cavity (2a), a core pin (10), and a plurality of recovery pin holes (9); a support block (15), threaded with the driving core (4), having a plurality of holes (9',12') for loading recovery pins and ejection pines; an upper ejection block (16) supported by a coil spring (17) and having a plurality of holes (9",12"); a lower ejection block (20) threaded with the upper ejection block (16).

Description

Mold Mod Wool Assembly for Plastic Injection Molding

1 is an assembly longitudinal cross-sectional view of the mold modulus assembly of the present invention.

2 is an exploded perspective view of the cassette mold mold of the present invention.

3 is a longitudinal cross-sectional view of FIG.

Figure 4 is a longitudinal cross-sectional view of the base modulus for mounting the present invention cassette type mold modul.

FIG. 5 (a) is a plan view along the line A-A of FIG. 1, and (b) is a plan view along the line A'-A 'of FIG.

6 is a longitudinal cross-sectional view showing a release operation state of a molded article in which the mold module assembly of the present invention is opened.

* Explanation of symbols for main parts of the drawings

1: mold module assembly 2: cavity

2a, 2b: half cavity 3: fixed side core

4: movable side core 5: cassette type mold modle

6: Base modle 6A, 6B: Upper and lower mounting members

7: molding material injection passage 7a: injection hole

8: Restoration pin 9, 9 ', 9 ": Restoration pin mounting hole

10: core pin 11: release pin

12, 12 ', 12 ": Ejection pin mounting hole 13: Split movable side core

13a: tall 14: bolt

15: support block 15a, 16a: spring guide

16: upper discharge block 17: coil spring

18: Restoration pin holder 19: Bolt

20: lower discharge block 21: injection device

22: bolt 23: fixed side mounting plate

24: movable side mounting plate 24a: eject hole

25: injection sleeve 26: injection sleeve guide plug

27: spring 28: discharge rod

29: Injection material extraction block 30, 30 ': Washer block

31, 31 ': Bolt 32: Fixed side plate

33: bushing 34, 34 ': bolt member

34a, 34a ': stop bolt 35: three-stage loop device

36: movable side plate 37: intermediate block

38: spacer block 39: through bolt

40: guide bushing 41: guide shaft

41a: Lubricant supply passage

The present invention relates to a plastic injection molding mold, and in particular, by molding and molding a product molding mold within a predetermined dimension, it is possible not only to mold a high-precision product but also to improve productivity. It relates to a mold module assembly.

In general, plastic injection molding products have a strong dependence on temperature, but are relatively widely used for transmitting small power because they are relatively strong and light. For example, office equipment such as copiers, fax machines, electric typewriters, and various printers for computers, A large number of plastic gears, cams or pulleys with various dimensions and shapes for transmitting power are used for cameras, watches or cassette tape recorders.

However, the injection molding die for producing such plastic products includes a pair of fixed side and movable side cores having cavities corresponding to the products to be molded, and various types of incidental components configured to be formed by these cores. Consists of a constituent member (hereinafter simply referred to as a mold mounting member) and an injection device for injecting a predetermined plastic molding material into the cavity of the core while being connected to the mold mounting member, in a conventional injection molding operation, Depending on the type and size of the product to be molded, each core having a cavity suitable for this is manufactured separately, and each mold mounting member is separately manufactured to correspond to the dimensions of these cores, and then integrally mounted with the core to an injection molding machine for molding. It is supposed to work.

Therefore, as the product to be molded varies, a mold having a predetermined cavity and a mold mounting member must be separately manufactured, which requires a considerable manufacturing time, and the mold is combined with an injection molding machine to prepare for a molding operation. Not only does it take a lot of time, but also has a problem that requires skill because it will have a significant impact on the precision of the product according to the accuracy of the preparation.

In addition, the plastic products as described above are small in size and vary in diameter by several millimeters, and thus have various dimensions and small quantities. Therefore, in order to mold the plastic products, a mold made of a plurality of components is manufactured separately. This not only increases the cost of manufacturing the mold, but also requires a considerable time and labor to produce the product, which makes it impossible to shorten the delivery period of the product and also reduces the production cost.

Accordingly, the present invention has been invented to solve the above problems, and a pair of fixed and movable cores having a predetermined cavity and a plurality of components for operating these cores are integrally combined to form one ratio. The cassette-type mold modulus can be stored inside, and is divided into a base modulus consisting of upper and lower mounting members respectively connected to the fixed side and the movable side of the injection molding by connecting the mold opening and closing device and the injection device. And the cassette-type mold modulus having a fixed side and a movable side core having a corresponding cavity formed according to the size and shape of the product to be molded is simply exchanged from the base modulus, so that a predetermined dimension range, for example, within 50 mm It is possible to easily manufacture a variety of molded products of a wide range of products, thereby increasing the product quality and productivity. Not only can it improve, but also the cassette-type mold modulus can be standardized for each product, and produced and stored in a large amount, thereby reducing the cost and labor required for mold production and lowering the production cost of the product. The purpose of the present invention is to provide an injection molding mold module assembly capable of improving the precision of a product.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The mold modulus assembly 1 of the present invention is a cassette type having a fixed side core 3 and a movable side core 4 in which a predetermined cavity 2 is formed to correspond to the shape of a product, as shown in FIG. Upper and lower base members which can be connected to the fixed side and the movable side of the injection molding machine (not shown) while being able to store the mold modulus 5 and the cassette-shaped mold modulus 5 in the inner center thereof ( 6A, 6B) is divided into a base modulus (6), the cassette-shaped mold modulus (5) made for each product is combined or separated to the base modul (6) to perform an injection molding operation have.

Here, the cassette-shaped mold modle 5 has a molding material injection passage 7 formed of horizontal and vertical passages in the center of the upper surface, as shown in FIGS. And a fixed side core 3 having a stepped portion 3a formed so that the washer block 30 to be described later is fitted while the cavity 2a corresponding to the upper surface shape of the product is formed. In combination with the cavity 2a of 3), a half cavity 2b corresponding to the edge of the product, for example, a gear tooth or a circumferential groove of a pulley, is provided. A movable side core 4 having a stepped portion 4a formed therein so that a plurality of restoring pin mounting holes 9 are drilled to be installed therethrough, and a washer block 30 'described later is fitted therein, and the inside of the movable side core 4 is provided. The lower part of the product while being inserted through the key (13a) in the center to prevent rotation A split movable side core having a plurality of discharge pin mounting holes 12 drilled through the core pin 10 to form a through hole formed in the center of the product and a product, and a discharge pin 11 to be described later. 13).

In addition, the cassette-type mold modulus 5 is coupled to the lower surface of the movable side core 4 as a bolt 14 while the restoring pin mounting hole 9 and the split movable side core of the movable side core 4 are provided. A support block 15 formed with holes 9 'and 12' corresponding to the discharge pin mounting hole 12 of 13, a spring guide 15a of the support block 15, and a top discharge described later. A plurality of discharge pin mounting holes on the spring guide portion 16a of the upper surface to fit the coil spring 17 elastically installed between the spring guide portion 16a of the upper surface of the block 16 and the discharge pin 11 An upper release block 16 through which a plurality of recovery pin mounting holes 9 "are formed so that the recovery pin 8 penetrates through the recovery pin holder 18 while a 12" is formed; The lower chamber to be fastened to the upper discharge block 16 and the bolt 19, and the head portion (8a, 11a) of the restoring pin (8) and the discharge pin (11) is seated on the upper surface, respectively. It consists of a block 20.

On the other hand, the base modulus 6, which can be assembled by storing the cassette-type mold modulus 5 configured as described above, is coupled to the fixed side of the injection molding machine by a clamp as shown in FIGS. 1, 2, and 5 degrees. To the upper mounting member 6A having the fixed side mounting plate 23 on which the injection device 21 is fastened by the bolt 22 and to the lower discharge block 20 of the cassette-type mold module 5. The bottom mount is equipped with a movable side mounting plate 24 which has an ejection hole 24a therein so as to be installed therethrough so that the eject rod (not shown) of the injection molding machine which is pressed against it and is pressurized therethrough is coupled to the movable side of the injection molding machine. A plurality of blocks divided into members 6B, each of which has a shape corresponding to the upper and lower mounting members 6A and 6B so as to closely fit the outer circumferential surfaces of the respective component blocks of the cassette-type mold modulus 5. This is a sequentially combined configuration The.

That is, the lower part of the fixed side mounting plate 23 provided in the upper mounting member 6A has a tapered portion at its tip to separate excess molding material solidified in the injection passage 7 after completion of injection molding from the cavity 2. Compression springs 27 in the cap 27b fixed to the bolts 27a while the injection sleeve guide plugs 26 are formed to guide the injection sleeves 25 while the 25a is formed. Ejection rod elastically installed to release the extra molding material solidified in the injection molding material injection passage 7 connected to the cavity 2 with one mold of the injection molding work completed and the molds open to each other. An injection material take-off block (29) equipped with (28) is coupled to the lower portion of the injection material take-off block (29). The fixed side core (3) of the cassette-type mold module (5) is attached to the washer block (30). While being fastened with bolts 31 as a medium, the coolant passage therein (3). The fixed side plate 32 through which 2a) is formed is coupled, where the fixed side plate 32 and the fixed side mounting plate 23 and the injection material extraction block 29 are connected by a known mold opening / closing mechanism. do.

That is, as shown in FIG. 4, the mold opening / closing mechanism includes a bolt member 34 fitted with a bushing 33 and having a male thread at one end thereof, and a female thread at one end to be screwed with the bolt member 34. FIG. The fixed side mounting plate 23, the injection material extraction block 29, and the fixed side mounting plate 32 are connected to each other by a predetermined distance through the formed stop bolt 34a, and injection molding is performed. When one cycle of the work is completed and the mold assembly 1 of the present invention is opened, a well-known three-stage ring device 35 for controlling the opening between the stationary side plate 32 and the movable side plate 36 is finally opened. Fixed to the fixed side and movable side plates 32 and 36, respectively, so as to be combined with the operation of the bolt 34 and the stop bolt 34a when the fixed and movable side cores 3 and 4 are opened and closed. have.

On the other hand, the lower side of the fixed side plate 32 provided in the lower mounting member (6B) the movable side core (4) in which the divided movable side core 13 is assembled through the washer block (30 ') with the bolt 31'. The side plate (36) having a cooling water passage (36a) is formed through the inside of the movable side plate (36), and the supporting block (15) of the cassette-type mold module (5) is provided below the movable side plate (36). ) Is fitted with an intermediate block 37 for storing the coil spring 17 and the upper and lower discharge blocks 16 and 20 between the movable side mounting plate 24 and the lower side of the intermediate block. The spacer block 38 is divided into two while a predetermined space is formed in the inner center so as to be fitted therein, wherein the movable mold 36, the intermediate block 37, the spacer block 38, and the movable side mounting plate are mounted. 24 are firmly fastened to each other by a plurality of through-bolts 39 (four in the present invention).

In addition, the movable side plate 36 and the stationary side plate 32 are also connected in the same configuration with respect to the mold opening and closing mechanism composed of the stop bolt 34 and the bolt member 34a described above, that is, the fixed side plate A bolt member mounted to the movable side plate 36 while a stop bolt 34 'having a female thread formed on one end thereof and a male thread formed on one end thereof so as to be screwed to the stop bolt 34' while being mounted to (32). Coupled to each other by 34a so that these stationary and movable side plates 32 and 36 are opened at predetermined intervals when the stationary and movable side cores 3 and 4 are opened, and the stationary and movable side cores When the 3 and 4 are fastened to each other and the injection molding operation proceeds, these fixed and movable mold plates 32 and 36 are brought into close contact with each other.

The fixed side mounting plate 23 and the injection material extraction block 29, the fixed side plate 32, the movable side plate 36, the intermediate block 37, and the spacer block constituting the base modle 6 38 is mounted on a plurality of guide shafts 41 formed with a lubricating oil supply passage 41a at predetermined intervals on the outer circumferential surface thereof via a pair of guide bushings 40, and connected to the fixed side as the injection molding operation proceeds. The injection material extraction block 29, the fixed side plate 32, the movable side plate 36 and the intermediate and spacer blocks 37 and 38 are in a predetermined distance range with respect to the fixed side mounting plate 23 which is fixed and supported. As they are guided within, they are moved forward and backward so that they are separated from each other to open or close to close.

Next, the effect of the mold modulus assembly of the present invention configured as described above will be described in relation to the injection molding operation.

First, the process of assembling the cassette type mold modulus 5 into the upper and lower mounting members 6A and 6B of the base modulus 6 will be described. The cavity corresponding to the lower half of the product to be manufactured is described. The core pin 10 and the split movable side core 13 machined to have (2b) are mounted to the center of the movable side core 4 via the key 13a, and under the movable side core 4 The support block 15 is fastened to the bolt 14, and then the coil spring 17 is mounted between the support block 15 and the upper discharge block 16.

Subsequently, the restoring pin 8 is inserted into the hole 9 "of the upper discharge block 16 through the restoring pin holder 18, so that the restoring pin 8 is connected to the hole 9 'of the support block 15. After passing through the holes 9 of the movable side core 4 in order, the discharge pin 11 is similarly installed through the holes 12 ", 12 ', 12, and then the upper discharge block 16 After the lower discharge block 20 is fixedly coupled to the bolt 19 by the movable side core 4, the support block 15, the coil spring 17, the upper discharge block 16, The lower discharge block 20 is fitted through the inside of the movable side plate 36 of the lower mounting member 6B, and then fixedly fastened by the bolt 31 'through the washer block 30'.

Next, the fixed side plate of the upper mounting member 6B with the bolt 31 through the washer block 30 with the fixed side core 3 having the cavity 2a corresponding to the upper half of the product to be manufactured. When the penetrating through the inside of the (32) is installed and then fixed to the bolt 31 through the washer block 30, the fixed side core (3) is a fixed side mounting plate equipped with the injection device (21) 23 and the molding material can be supplied through the injection passage 7 which is connected to the injection sleeve 25 of the injection material extraction block 29 coupled thereto.

Next, the injection molding operation using the mold modulus assembly 1 of the present invention will be described.

After mounting the mold modulus assembly (1) assembled as described above to the injection molding machine to operate the mold fastening cylinder (not shown), the fixed side core (3) is mounted and fixed to the fixed side of the injection molding machine The lower mounting member 6B of the base modulus 6 on which the movable side core 4 is mounted is guided on the guide shaft 41 with respect to the upper mounting member 6A of the base modul 6 held in the state. According to the combination operation of the mold opening / closing mechanism, the fixed side core 3 and the movable side core 4 are closed with each other to form a cavity 2 corresponding to the shape of the product therebetween as shown in FIG. Done.

Subsequently, the injection cylinder (not shown) is operated to inject the molding material in a liquid state maintained at a predetermined temperature through the injection apparatus 21. Then, the molding material is injected through the injection sleeve 25 of the injection apparatus 21. It flows into the horizontal passage of the injection passage 7 of the fixed side core 3 and is then filled into the cavity 2 from the injection opening 7a through the vertical passage.

Next, when the molding material inside the cavity 2 becomes solidified after a predetermined time, the mold fastening cylinder (not shown) is operated in the opposite direction to move the upper and lower mounting members 6A and 6B of the base modulus 6 to the opposite direction. As shown in FIG. 6, the lower mounting member 6B fastened to each other with the through-bolt 39 as the movable side of the injection molding machine moves backward, as shown in FIG. As the plate 24, the intermediate block 37, and the movable side plate 36 on which the movable side core 4 is mounted are moved back together, the bolt members and the stop bolts 34 'and 34a' are moved to a predetermined distance. Sliding with each other, the fixed side plate 32 and the movable side plate 36 is opened to form a predetermined interval, and accordingly the fixed die 3 and the movable side core 4 open to each other in the cavity 2 The molding material solidified in the mold and the excess molding material solidified in the injection passage 7 are cut into each other. It is presented.

Subsequently, the injection material extraction block 29 and the fixed side mounting plate 23 connected to the fixed side plate 32, the bolts and the stop bolts 34 and 34a are also bolted and the stop bolts 34 and 34a as described above. Are separated as they move as they slide by a predetermined distance. At this time, the injection rod is ejected from the injection material extraction block 29 and the discharge rod 28 elastically installed in the compressed state by the spring 27. (7) The excess molded material solidified in (7), that is, the solidified material in a shape corresponding to the horizontal and vertical passages of the injection passage (7) is released.

Next, when the ejection rod (not shown) pushes the lower emission block 20 through the ejection hole 24a formed in the movable side mounting plate 24 while the product discharge cylinder (not shown) is operated. The lower discharge blocks 16 and 20 are advanced to charge the restoring pins 8 and the discharge pins 11, so that the distal end of the discharge pins 11 is in the cavity 2b of the movable side core 4; One cycle of the injection molding operation is completed by releasing the remaining product after solidification. When the product discharge cylinder (not shown) is retracted while being reversed, the upper and lower discharges are caused by the restoring force of the coil spring 17. As the blocks 16 and 20 are retracted, the mold opening / closing cylinder (not shown) is operated again in the opposite direction, so that the cassette type mold modulus 5 and the upper and lower mounting members 6A and the base modulus 6 together. 6B) are fastened to each other, in the same manner as in the above description, between For injection is prepared by molding operations.

As described above, in the mold modulus assembly 1 of the present invention, the cassette-shaped mold modul 5 having the fixed side and the movable side cores 3 and 4 and the split movable side core 13 is the fixed side of the injection molding machine. And the modulus to be detachable to the base modulus 6 formed of the upper and lower mounting members 6A and 6B connected to the movable side, respectively, to fix the product having different dimensions and shapes. Only the side cores 3 and 4 and the split movable side core 13 are disassembled and replaced with a die having a corresponding cavity or a cassette having the fixed side and movable side cores 3 and 4 and the split movable side core 13. In order to produce the mold mold wool (5) by the product size and shape so as to produce a product of the predetermined dimension and shape, separately produced and stored in the production of a predetermined dimension, take out the corresponding fixed and movable side core (3, 4) When mounted on the base modle (6) It is possible to perform the molding operation, as well as to reduce the hassle of manufacturing the cassette-type mold modulus 5 and the base modulus 6 separately for each product separately, as well as the mold production cost required This greatly improves productivity by significantly reducing labor and preparation time.

Meanwhile, in the above description, only one cavity 2 is formed on the stationary side and the movable side cores 3 and 4 of the cassette-type mold modulus 5, so that one product can be produced per one injection molding operation. As another embodiment of the present invention, a pair of cavities 2 are respectively formed on the stationary and movable side cores 3 and 4 of the cassette-type mold modulus 5 to produce two products for each injection molding operation. In this case, the cavity (2a, 2b) and the core pin 10, the split movable side core 13 and the discharge pin 11 of the fixed and movable side cores (3, 4), respectively, a pair Except for being equipped, other components are only slightly larger in size, and the detailed description thereof will be omitted because the configuration and the operation are the same.

As described above, in the present invention, the mold of the injection molding machine is divided into a base mold (6) consisting of a cassette-type mold modulus (5) and upper and lower mounting members (6A, 6B), respectively. The cassette type mold modulus 5 is manufactured by separately manufacturing the fixed side and movable side cores 3 and 4, the core pin 10 and the split movable side core 13 to have a predetermined dimension and shape according to the type of product. In order to manufacture a product having a predetermined dimension and shape by standardization, the corresponding cassette-type mold modulus 5 is simply assembled to the base modulus 6 of the injection molding machine to perform the injection molding operation, thereby preparing the molding work. In this case, the cassette-type mold modulus 5 is manufactured by standardizing the dimensions and shapes as described above, thereby reducing the cost and labor of manufacturing the entire mold modul assembly for each product. In addition to lowering the production cost, it is possible to shorten the delivery period of the product. In addition, as described above, the cassette-type mold modulus 5 is manufactured and stored in a separate storage case, thereby trapping foreign substances in the mold. In addition, the accuracy of the product can be improved by preventing corrosion, and the storage case of the cassette-type mold modulus 5 as described above has a small size and the same size, so that it can be stored in a large amount even in a narrow space. On the other hand, by attaching the item management label to the storage case is given a unique number, there is an effect such as to improve the efficiency in the mold management and maintenance in the shop floor.

Claims (2)

In the mold module assembly, which is coupled to the fixed side and the movable side of the injection molding machine, respectively, and has a fixed side core (3) and a movable side core (4) to enable injection molding of the product, the mold module assembly (1) The cavity corresponding to the cavity (2) and the cavity (2a) of the fixed side core 3 and the fixed side core (3a) having a half cavity (2a) formed at the bottom while forming a plurality of injection holes (7a) A movable side core 4 having a plurality of restoring pin mounting holes 9 and a release pin mounting hole 12, having a core pin 10 and a split movable side core 13 to form (2b), the movable side Supporting block 15 having a plurality of recovery pin mounting holes 9 'and ejection pin mounting holes 12' screwed into the core 4 with bolts 14, the lower surface of the supporting block 15 and An upper discharge block 16 having a plurality of restoring pin mounting holes 9 " and ejection pin mounting holes 11 " while allowing the coil spring 17 to be elastically installed therebetween; A cassette-type mold modulus (5) consisting of a lower discharge block (20) which is fastened to the upper discharge block (16) by a bolt (19); and an injection sleeve (25) coupled to a fixed side of an injection molding machine. An injection sleeve guide plug having a fixed side mounting plate 23 on which the injection device 21 is mounted, and a discharge rod 28 elastically installed by a spring 27 between the fixed side mounting plate 23 and the fixed side mounting plate 23. A fixed side configured to mount the fixed side core 3 via the washer block 30 and the bolt 31 while being engaged with the injection material extraction block 29 having the injection material extraction block 29 having the 26; The fixed side plate 32, the injection material take-off block 29, and the fixed side mounting plate 23 are connected to each other by the bolt member 34 and the stop bolt 34a. Member 6A: The movable die 4 is fastened by the washer block 30 'and the bolt 31' while the bolt member 34 'and the stop bolt 34a' are attached to each other. A movable side plate 36 connected to the fixed side plate 32, an intermediate block 37 for fitting the support block 15 under the movable side plate 36, and the intermediate block 37 The spacer block 38 for fastening the upper and lower discharge blocks 16 and 20 at the bottom of the bottom), and the eject rod for pressing the lower release block 20 at the bottom of the spacer block 38 The movable side mounting plate 24, the spacer block 38, the intermediate block 37, and the movable side plate 36 are formed of a movable side mounting plate 24 having an ejection hole 24a to penetrate (not shown). ) Is divided into a base modle (6) consisting of a lower mounting member (6B) fastened by a through-bolt (39), the base modulus (6) inside the cassette-shaped mold modul (5) It can be stored so as to be detachable, and the upper and lower mounting members 6A and 6B of the base modle 6 approach each other. The mold modulus assembly for plastic injection molding, characterized in that mounted on the guide shaft (41) via the guide bushing (40) to be retracted or retracted. The fixed side core (3) of the cassette-shaped mold modulus (5) is formed side by side, and the movable side core (4) also has a pair of core pins (10) and A mold modulus assembly for plastic injection molding, characterized in that the split movable side cores 13 are each provided to form a pair of half cavities 2b.

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