KR101058362B1 - Rotary type multi injection mold - Google Patents

Abstract

PURPOSE: A rotary multiple injection mold is provided to facilitate the cooling of injection molded products by injecting cooling water near an inner cavity of a movable mold. CONSTITUTION: A rotary multiple injection mold comprises a fixed mold(100) and an movable mold(200). The movable mold is detachably assembled in the fixed mold. The movable mold comprises a movable template, a rotary template member, a vertically moving member, and a rotating member. The rotary template member is projected from the movable template toward a stationary retainer plate(140). The rotary template member is separated from the movable template and rotates at a fixed angle when the movable and fixed molds are separated each other. The rotating member rotates the rotary template member at a designated angle.

Description

ROTARY TYPE MULTI INJECTION MOLD}

The present invention relates to a rotary multi-injection mold, and more particularly to a plurality of cavities which are different shapes when rotationally coalesced at a predetermined angle on the same horizontal plane with respect to the central axis in order to mass produce an injection product having a hollow shape. At the same time, the fixed side mold and the movable side mold are formed so as to face each other and the movable side mold is rotated at a predetermined angle with respect to the fixed side mold to change the shape of the cavity to inject the injection resin while finally injecting the desired injection product. It relates to a rotary multi-injection mold to sequentially mass production.

In general, injection molds are mainly used to mass-produce injection products made of synthetic resin. Such an injection mold has a cavity corresponding to the shape of the injection product formed therein when a pair of molds are merged, and produces an injection product by injecting molten resin therein.

In order to efficiently mass-produce an injection product having a hollow shape among these injection products, a plurality of cavities are formed by forming a plurality of cavities in a pair of molds to manufacture an intermediate injection molded product, and then integrating them. Injection molds have been developed.

Representative examples of such a multi-injection mold are Patent Document 1 of the [Previous Technical Document] described later and a multi-injection mold of a die sliding injection (DSI) method shown in FIG. 28.

DSI (die sliding injection) multi-injection mold manufactures two intermediate injection molded products by injecting molten resin into two different cavities which are formed at the time of coalescence, and then linearly moves the movable mold against the fixed mold. After moving and coalescing, molten resin is injected into the joint to produce an injection product having a hollow shape.

However, the multi-injection mold of the DSI method has a problem of securing a linear movement space of the mold according to the sliding movement, and the molding part forming the cavity according to the sliding movement is exposed to the outside for a long time, resulting in contamination of the injection product. There is a problem that is increased.

In order to solve such a problem, multiple injection molds of DRI (die rotary injection) method shown in [Patent Document 2] of FIG. DRI-type multi-injection mold can solve the problem of DRI-type multi-injection mold because mass-produced injection products can be produced in a large quantity through the rotation method rather than sliding the movable mold with respect to the fixed-side mold. There is this.

However, in the case of the movable injection mold, the multiple injection mold of the DRI method shown in Patent Document 2 and FIG. 29 rotates in a state in which the movable die 2 is directly in contact with the support 51, so that rotational frictional resistance is generated. In order to reduce such rotational frictional resistance, an oilless component must be installed at the contact portion, and since the oilless component is a consumable part, periodic replacement is required, resulting in inconvenience that requires a lot of time and cost for installation and management. .

On the other hand, in the multi-injection mold of the DRI method shown in Patent Document 3 and FIG. 30, the movable side molds 30a and 30b move the fixed side molds 10a and 10b by the elevating plate 7 from the movable side disc 3. Since it is possible to rotate in a protruding state, it is possible to solve the problem of the multi-injection mold of the DRI method shown in Patent Document 2 and FIG. 29.

However, the multi-die injection mold of the DRI method shown in Patent Document 3 and FIG. 30 has a high temperature injected into the cavity because the movable side molds 30a and 30b are accommodated in the movable side disc 3 except in the state of rotation. There was a problem in that a cooling water injection member capable of efficiently cooling the molten resin of γ cannot be installed to the inside of the cavity vicinity of the movable side mold. In addition, in order to protrude or accommodate the movable side molds 30a and 30b from the movable side disc 3, a separate driving device driven by an external power source or the like for moving the elevating plate 7 forward or backward must be provided in addition to the rotary device. There was a problem.

JP 1987-87315 A JP 1992-91914 A KR 10-2007-0041115 A

Therefore, the technical problem to be solved by the present invention is to solve the problem of the multi-injection mold of the conventional DRI method of rotation method, there is no need to install a separate oilless (oilless) parts on the movable mold, the cavity inside the movable mold Not only has a structure that can easily inject coolant into the vicinity, but also provides a rotary multi-injection mold in which a part of the movable mold can move forward or backward so as to eliminate friction due to rotation without supplying an external power source. There is.

The rotary multi-injection mold according to the present invention for solving the above problems is provided with a hot runner system therein, and a fixed side mold having at least two different shapes of fixed side cavities formed at a predetermined angle with respect to the upper center portion. And a movable side mold which is disposed so as to be joined to or separated from the fixed side mold, and has at least two different shapes of movable side cavities corresponding to the fixed side cavity with respect to the upper center part to form a predetermined angle. The movable side mold has a movable side template, the movable side cavity is formed on the upper side, protrudes from the movable side template toward the fixed side template, and the movable side when separated from the fixed side mold. Separated from the template at predetermined intervals, and can be rotated at a predetermined angle Rotational template member. And a vertical movement member having an elastic member that provides an elastic force with respect to the rotating template member at the rear of the rotating template member, and a rotating member for rotating the rotating template member at a predetermined angle.

The movable side template may have a shaft through hole formed at a center thereof, and the rotating member may include a shaft fastened to the shaft through hole, and the elastic member may provide an elastic force to the shaft.

The vertical movement member may further include at least one bearing accommodated in the inner diameter to be coupled to the outer diameter of the shaft, and a bearing housing for transmitting the elastic force of the elastic member to the shaft through the bearing.

The vertical movement member is a slide bar for mutually fixing the bearing housing and the rotating member between the bearing housing and the rotating member,

It may further include a ball bush fixedly coupled to the movable side template to accommodate the slide bar to guide the forward or backward movement of the slide bar.

The movable side template may further include a ball bushing fastening hole and an accommodating groove accommodating the elastic member in front of the edge of the shaft through hole.

The bearing is provided so that the front end is caught on the step of the shaft, the vertical movement member may further include a bearing nut fastened to the outer diameter of the shaft at the rear of the bearing.

When there are a plurality of bearings may further include a bearing engaging projection protruding inward from the inner diameter of the bearing housing so that the plurality of bearings are separated from each other.

The movable side template further includes a rotation template stopper protruding from an upper surface to limit the rotation angle of the rotation template member, and the rotation template member accommodates the rotation stopper on a rear surface thereof and both ends of the rotation template stopper are rotated. The rotating template guide groove may be further formed.

The movable side mold may further include a fixed plate for fixing the movable side mold, and a spacer accommodating the rotating member therein and fixedly coupling the movable side mold to the fixed plate.

The rotating member may further include a rotating gear member for rotating the shaft, and a bracket fixing plate for fixedly coupling the rotating gear member to the slide bar.

The rotary gear member may include a rack gear cylinder and a rack gear and a spur gear for converting the linear motion generated by the rack gear cylinder into a rotary motion.

The rotating member may further include a cylinder bracket for fixing the rack gear cylinder to the bracket fixing plate, and a rack gear stopper for limiting linear movement of the rack gear.

The rotating member may further include a rack gear liner fixed to the bracket fixing plate to guide linear movement of the rack gear, and a stopper bracket fixed to the bracket fixing plate to fix the rack gear stopper.

The rotating template member may further include a coolant channel disposed inwardly from the side to be adjacent to the movable side cavity, and a coolant hose connected to the coolant channel along a portion of the side circumference to supply the coolant.

The shaft may further have a bearing lubricating oil injection hole penetrating laterally from the rear end to supply lubricating oil to the bearing.

As described above, according to the rotary multi-injection mold according to the present invention, since frictional resistance due to contact does not occur during rotation, there is an advantageous effect that there is no need to install a separate oilless component on the movable side mold.

In addition, according to the rotary multi-injection mold according to the present invention, it is possible to easily inject coolant into the inner cavity of the movable side mold, thereby facilitating the cooling of the injection product, and thus reducing the manufacturing time and manufacturing defect of the injection product. There is.

In addition, the rotatable multi-injection mold according to the present invention provides a rotatable multi-injection mold in which the rotatable die member of the movable side mold can move forward or backward so as to eliminate friction due to rotation without supplying an external power source. have.

1 is a combined perspective view of a rotary multiple injection mold according to an embodiment of the present invention,
Figure 2 is a perspective view of a fixed side mold of the rotary multi-injection mold according to an embodiment of the present invention,
3 is an enlarged view of the first fixed core region shown in FIG. 2, FIG.
4 is an internal perspective view of the fixed side mold of the rotary multiple injection mold of FIG.
5 is an internal perspective view of the fixed side mold of the rotary multiple injection mold of FIG.
6 is a perspective view of a movable side mold of a rotary multiple injection mold according to an embodiment of the present invention;
7 is an internal perspective view of the movable mold of the rotary multi-injection mold of FIG. 6 for explaining the connection relationship between the movable coolant channel and the cooling hose;
8 is an internal perspective view showing a state in which the rotating die member of the movable side mold of the rotary multiple injection mold of FIG. 7 is rotated 120 degrees in a counterclockwise direction,
FIG. 9 is a perspective view illustrating a state in which a rotating template member is removed from the rotating multiple injection mold of FIG. 6;
10 is a perspective view of the movable side mold of the rotatable multi-injection mold according to one embodiment of the present invention viewed from the opposite direction,
FIG. 11 is a perspective view illustrating a mutual coupling relationship between a rotating template member, a shaft, and a bearing housing by removing a part of the rotating member of the movable side mold of the rotary multi-injection mold of FIG. 10;
12 is a cross-sectional view illustrating a state in which the rotating template member is cut back along the AA line of FIG. 6 and brought into contact with the movable side template;
FIG. 13 is a cross-sectional view showing a state in which the rotating template member of FIG. 12 is advanced and the contact is released from the movable side template; FIG.
14 to 25 are views sequentially showing a method of manufacturing an injection product having a hollow shape by using a rotary multiple injection mold according to an embodiment of the present invention.
14 is a perspective view illustrating a state in which molten resin is injected into a first cavity and a second cavity of a rotary multi-injection mold according to an embodiment of the present invention through a first hot runner, respectively;
15 is an enlarged view of the rotation template member area of FIG. 14;
16 is a perspective view of the rotary multi-injection mold of FIG.
17 is a perspective view of the rotary multi-injection mold according to the embodiment of the present invention of FIG. 16 viewed from the opposite direction,
18 is a perspective view showing a state in which the rotary template member of the rotary multi-injection mold of FIG. 16 is rotated 120 degrees in a counterclockwise direction;
19 is a perspective view from behind of the movable side mold of the rotary multiple injection mold of FIG. 18;
20 is a perspective view illustrating a state in which molten resin is injected for mutual bonding of a first injection molding and a second injection molding through a second hot runner of a rotary multi-injection mold according to an embodiment of the present invention. Degree,
21 is an enlarged view of the rotation template member area of FIG. 20,
FIG. 22 is a perspective view of the rotary multiple injection mold of FIG. 20 secondarily opened; FIG.
FIG. 23 is a perspective view of the rotary multiple injection mold of FIG. 22 viewed from the opposite direction;
24 is an enlarged perspective view of a first fixed core region showing a state in which a slat core pin bonded to one end of a coalescing injection molding is separated;
FIG. 25 is a perspective view showing a state in which the coalescent injection molded product of FIG. 24 is taken out from the first fixed core by using a takeout member; FIG.
26 is a perspective view of the coalesced injection molded product taken out,
27 is a perspective view of an injection product having a hollow shape that is finally completed by removing unnecessary portions of the coalescence injection molding;
28 is a side cross-sectional view of a multi-component injection mold of a conventional DSI system;
29 is a side cross-sectional view of a conventional injection molding multiple injection mold, and,
30 is a side cross-sectional view of another conventional DRI multiple injection mold.

Specific details of other embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various other forms, and it should be understood that the present embodiment is intended to be illustrative only and is not intended to be exhaustive or to limit the invention to the precise form disclosed, To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout. Embodiments described herein will be described with reference to the ideal perspective, enlarged, perspective and cross-sectional views of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation method of a rotary multi-injection mold according to an embodiment of the present invention.

First, a rotary multi-injection mold according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 13.

1 is a perspective view of a combination of a rotary multi-injection mold according to an embodiment of the present invention, Figure 2 is a perspective view of a fixed side mold of the rotary multi-injection mold according to an embodiment of the present invention, Figure 3 is a second 1 is an enlarged view of the fixed core region, FIG. 4 is an internal perspective view of the fixed side mold of the rotary multi-injection mold of FIG. 1, FIG. 5 is an internal perspective view of the fixed side mold of the rotary multi-injection mold of FIG. Is a perspective view of a movable side mold of a rotary multi-injection mold according to an embodiment of the present invention, and FIG. 7 is an interior of the movable side mold of the rotary multi-injection mold of FIG. 6 for explaining a connection relationship between a movable side coolant channel and a cooling hose. Fig. 8 is an internal perspective view showing a state in which the rotatable plate member of the movable side mold of the rotatable multi-injection mold of Fig. 7 is rotated 120 degrees counterclockwise; 10 is a perspective view showing a state in which the rotatable die member is removed, FIG. 10 is a perspective view of a movable side mold of a rotary multi-injection mold according to an embodiment of the present invention, viewed from the opposite direction, and FIG. 11 is a movable side of the rotary multi-injection mold of FIG. 10. A perspective view showing the mutual coupling relationship between the rotating die member, the shaft and the bearing housing by removing a part of the rotating member of the mold, and FIG. 12 is a state in which the rotating die member is retracted and is in contact with the movable side template along the AA line of FIG. 6. 13 is a sectional view showing a state in which the rotating template member of FIG. 12 is moved forward and the contact is released from the movable side template.

The rotary multi-injection mold 1 according to an embodiment of the present invention includes a stationary side mold 100 and a movable side mold 200 disposed to be opposed to each other or to be combined with each other. do.

As shown in FIGS. 1 to 5, the stationary side mold 100 includes a first stationary plate 110, a first manifold template 120, a first spacer 130, a stationary side template 140, and a takeout member ( 150 and slide core member 160.

The first fixing plate 110 is a plate for fixedly attaching the fixed side mold 100 to an injection apparatus (not shown), and an injection machine nozzle injection hole 112 to which an injection machine nozzle (not shown) for injecting molten resin into a rear end portion thereof is coupled. Is formed.

The first manifold template 120 is coupled to the upper portion of the first fixing plate 110 and the manifold 127 of the hot runner system 125 by the manifold fixing pin 129 therein as shown in FIG. 5. ), A manifold accommodating portion 122 is formed.

The hot runner system 125 includes a sprue 126, a manifold 127, and a hot nozzle 128, which are well known configurations.

        As shown in FIG. 14, the hot runner system 125 is alternately opened and closed inside each other to allow three branched first hot runners 125a through which molten resin passes and two branched second hot runners 126a. Is formed.

The first spacer 130 is coupled to the upper portion of the first manifold template 120, and when the coalesced injection molding 30 shown in FIG. 26 is taken out, the contact plate 152 of the blowout member 150 to be described later may move. To provide space.

The fixed side template 140 is fixed to the first manifold template 120 by the center pin 149 and is coupled to the upper portion of the first spacer 130, and the first fixed core 142 based on the upper center thereof. The second fixing core 144 and the rotation core avoiding groove 145 are disposed at an angle of 120 degrees. In addition, the fixed side template 140 has three coaters 146 protruding upward, and guide pin receiving grooves 147 are formed at four corners, respectively. In addition, the fixed side template 140 has a fixed side coolant channel 148 connected to an external coolant hose (not shown) as shown in FIG. 4.

As shown in FIG. 3, the first fixing core 142 is formed with a first recessed cavity 142a corresponding to one side shape of the first injection molding 10 (see FIG. 17), and the first recessed cavity 142a. At the bottom of the) is a cold cat 142d, which is an end of the cold runner 142c connected to the second hot runner 125b.

As shown in FIG. 2, the second fixing core 144 has a second protruding cavity 144a corresponding to one side shape of the second injection molding 20 (see FIG. 16), and the second protruding cavity 144a. The fixed side take-out block 144d for taking out the 2nd injection molding 20 is provided in both ends of ().

The rotary core avoidance groove 145 has a first rotating core 262 rotated by 120 degrees from its original position when the fixed side mold 100 and the movable side mold 200 are merged for injection molding. The first rotational core 262 is coupled to the housing so as not to hit the top.

The extraction member 150 is installed in the space portion between the first manifold template 120 and the fixed side template 140 provided by the first spacer 130, and is provided with a plate 152, a plate cylinder 154, and a mill pin. 156 and return pin 158.

The plate 152 is coupled to protrude and extend the forward motion provided by the plate cylinder 154 to the first recessed cavity 142a and the cold runner 142c of the first fixed core 142 as shown in FIG. 3. Transfer to Milpin 156. The pin 156 protrudes from the first recessed cavity 142a and the cold runner 142c when the plate 152 is advanced to separate the coalescing injection molding 30 (see FIG. 25) from the first fixed core 142. .

The return pin 158 is coupled to the mill plate 152 so as to protrude upward from the stationary side plate 140, and is fixed to the stationary side mold 100 and the movable side mold when protruded by the forward movement of the plate 152. In contact with the rotary die member 260 during the coalescing of the 200, the retracting mill plate 152 retracts the mil pin 156 protruding from the first recessed cavity 142a and the cold runner 142c. Retreat.

The slide core member 160 is provided at one end of the first fixed core 142 and includes a slide core body 162, a slide core pin 164, a guide rail 166, and a slide core cylinder 168.

The slide core body 162 moves up and down by the guide of the guide rail 166 by the slide core cylinder 168 to couple the slide core pin 164 coupled to the upper portion of the first recessed cavity 142a. Or by disengaging the coupling, one end of the first injection molding 10 may have a hollow shape or the coalescing injection molding 30 may be taken out of the first fixing core 142 during the injection operation.

Hereinafter, the movable side mold 200 will be described.

As shown in FIGS. 6 to 13, the movable side mold 200 includes a second fixing plate 210, a second spacer 230, a movable side template 240, a rotating template member 260, a rotating member 280, and the like. The vertical movement member 290 is included.

The second fixing plate 210 fixedly attaches the movable side mold 200 to an injection apparatus (not shown) so as to face the fixed side mold 100.

The second spacer 230 is coupled to the upper portion of the second fixing plate 210 and provides a space in which the rotating member 280 for rotating the rotating template member 260 to be described later is installed.

The movable side template 240 is coupled to the upper portion of the second spacer 230, and supports the vertical movement member 290 in combination. To this end, as shown in FIG. 9, the movable side template 240 has a shaft through hole 242 formed at the center thereof, and a ball bushing hole 244 at the edge of the shaft through hole 242. The housing spring receiving groove 245 is formed. In addition, two rotational template stoppers 246 protrude from the upper portion at a 120 degree angle with respect to the central portion of the shaft through hole 242. In addition, the guide pin for receiving and coupling to the guide pin receiving groove 147 when the fixed side mold 100 and the movable side mold 200 are coupled to each other to align the coupling positions between the fixed side mold 100 and the movable side mold 200. 247 is formed at four corners to protrude upward.

Rotational template member 260 is coupled to the rotating member 280 to be described later to be rotated at an angle of 120 degrees in the clockwise or counterclockwise direction by the rotational movement of the shaft 281, the shaft 281 is moved forward or The movable side template 240 is contacted or separated by the vertically movable member 290 which moves backward.

As shown in FIG. 10, the rotatable die member 260 includes a rotatable die stopper guide groove 261, and includes a first rotatable core 262, a second rotatable core 264, and a fixed core avoidance groove 265. A coater socket 266 and a movable side coolant channel 268.

The rotary die stopper guide groove 261 is formed at the rear of the rotary die member 260, and when the rotary die stopper 246 receives the rotary die stopper 246 to rotate by the rotary member 280. Each end of the rotary die stopper 246 is locked to limit the rotation angle of the rotary die member 260. The rotation of the rotating template member 260 is made by the rotational movement of the shaft 250 coupled to each other by the fastening member through the shaft fastening hole 267.

The first rotary core 262, the second rotary core 264, and the fixed core avoidance groove 265 are disposed on the rotary template member 260 to form an angle of 120 degrees with respect to the central axis of the shaft 250, respectively. have.

The first rotating core 262 is formed with a first protruding cavity 262a corresponding to the other shape of the first injection molded product 10. Therefore, when the first recessed cavity 142a and the first protruding cavity 262a are combined, a cavity corresponding to the shape of the first injection molding 10 is formed. In the lower portion of the first protruding cavity 262a, the extraction spring (to take out the first injection molding 10 from the first protruding cavity 262a) is separated from the fixed side mold 100 and the movable side mold 200. 262e (refer FIG. 12) is provided with the movable side extraction block 262d provided with elastic force.

The second rotating core 264 is formed with a second recessed cavity 264a corresponding to the other side shape of the second injection molding 10. Accordingly, when the second protruding cavity 144a and the second recessed cavity 264a are combined, a cavity corresponding to the shape of the second injection molding 10 is formed.

The fixed core avoidance groove 265 is formed by the combination of the fixed mold 100 and the movable mold 200 for the injection operation, that is, the second fixed core (2) by the rotary die member 260 rotated 120 degrees from its original position during mold closing. The second fixing core 144 is received and coupled to prevent the 144 from hitting the upper portion of the rotating template member 260.

The coater socket 266 accommodates the coater 146 to align the positions of the fixed side template 140 and the rotating template member 260 during mold closing.

The movable side coolant channel 268 is formed inside the first rotating core 262 and the second rotating core 264 as shown in FIGS. 7 and 8. The movable side coolant channel 268 is connected to a coolant hose 269 disposed adjacent to the side of the rotating template member 260. Thus, the first protruding cavity 262a and the second depression formed in the first rotating core 262 and the second rotating core 264 by the cooling water introduced into the movable side cooling water channel 268 through the cooling water hose 269, respectively. The hot molten resin injected into the cavity 264a can be easily cooled. On the other hand, the coolant hose 269 is omitted in the remaining drawings other than FIGS. 7 and 8 for convenience of illustration.

In the case of the rotary multi-injection mold 1 according to the exemplary embodiment of the present invention, the rotatable die member 260 is always provided to protrude from the movable side die 240. Therefore, since the coolant hose 269 can be connected to the movable side coolant channel 268 while being disposed adjacent to the side of the rotary die member 260, the rotary die member 260 is counterclockwise as shown in FIGS. 7 to 8. Even if it rotates by 120 degrees, there is an advantage that interference with other components does not occur.

The rotary member 280 is connected to the rotary template member 260 so that the rotary multi-injection mold 1 firstly makes the first injection molding 10 and the second injection molding 20, and secondly, the first injection molding ( 20) and the second injection molding 20 to rotate the rotational template member 260 in a clockwise or counterclockwise direction in order to complete the coalescing injection molding 30 to rotate the rotational template member Provided at 260.

To this end, the rotating member 280 may include a shaft 281, a bracket fixing plate 283, a cylinder bracket 284, a rack gear liner 285, a stopper bracket 286, a rack gear stopper 287, and a rotating gear member 288. It is configured to include).

The shaft 281 is connected to the rear center portion of the rotating template member 260 and transmits the rotational force generated by the rotating gear member 288 to the rotating plate member 260. On the other hand, the inside of the shaft 281 is formed with a bearing lubricating oil injection hole (281a) is formed through the side from the rear side to inject lubricating oil for smooth operation of the bearing (294) to be described later.

The rotary gear member 288 generates a rotational force for rotating the rotary template member 260, and includes a power lock 288a, a spur gear 288b, a rack gear 288c, and a rack gear cylinder 288d.

The spur gear 288b is fixed to the shaft 281 by the power lock 288a and rotates the vertical movement of the rack gear 288c generated by the rack gear cylinder 288d fixedly coupled to the cylinder bracket 284. Transition to motion and transfer to shaft 281. At this time, the rack gear (288c) is guided by the rack gear liner (289) to prevent the deviation in position during the vertical movement, the downward movement is limited by the rack gear stopper (287) accommodated in the stopper bracket 286 do.

The bracket fixing plate 283 fixes the cylinder bracket 284, the rack gear liner 285, and the stopper bracket 286 described above to ensure stable operation of the rotary gear member 288.

The vertical movement member 290 rotates the shaft 281 so as to prevent rotational friction caused by the contact between the movable side template 240 and the rotation member 280 during the rotational movement of the rotation template member 260 by the rotation member 280. Advance the predetermined distance so that the rotating member 280 connected to the shaft 281 is advanced from the movable side template 240 to be separated from the movable side template 240.

To this end, the vertical movement member 290 includes a bearing housing 291, a slide bar 292, a ball bush 293, a bearing 294 and a bearing nut 295, and a housing spring 296 that is an elastic member.

The bearing housing 291 is accommodated in the shaft through-hole 242 such that the two bearings 294 are separated from each other by a bearing engaging jaw 291a formed in the inner diameter to surround the center portion of the outer diameter of the shaft 281. The bearing housing 291 is moved forward by receiving the elastic force of the housing spring 296 which will be described later so that the rotating die member 260 can be separated from the movable side template 240 and transferred to the shaft 281.

The slide bar 292 supports the rotating member 280 by interconnecting the bearing housing 291 and the bracket fixing plate 283. Therefore, there is an advantage that it is not necessary to separately provide a fixing device for fixing the rotating member 280 to the movable side mold (200).

The ball bush 293 is fixedly coupled to the movable side template 240 while the slide bar 292 is wrapped to guide the forward and backward movement of the slide bar 292.

Two bearings 294 are accommodated in the inner diameter of the bearing housing 291 with the bearing engaging jaw 291a interposed therebetween so that the shaft 281 can rotate smoothly inside the bearing housing 291. Among these, in the case of the bearing 294 installed in front of the bearing engaging jaw 291a, the inner diameter is in contact with the center of the outer diameter of the shaft 281, and the front end is positioned to catch the step of the shaft 281, and the bearing engaging jaw 291a The bearing 294 installed at the rear of the side face is in contact with the central portion of the shaft 281 and the rear end is fixedly supported by the bearing nut 295. Therefore, when the mold starting bearing housing 291 moves forward by the elastic force of the housing spring 296, the bearing 294 transmits the forward movement to the shaft 281. Unlike the present embodiment, the bearing 294 may be provided with one or three or more, and when provided with one, the bearing engaging jaw 291a may be omitted and provided with three or more bearing engaging jaws 291a. More than one can be added.

On the other hand, the housing spring 296 is accommodated in the housing spring receiving groove 245 and provides an elastic force to the rear of the bearing housing 294. Although the housing spring 296 is used as the elastic member in this embodiment, it may be replaced by another known elastic member that provides elastic force.

Therefore, when the rotary multi-injection mold 1 is separated or opened, the rotating die member 260 in contact with the fixed side template 140 is released from the bearing housing due to the elastic force of the housing spring 296 as shown in FIG. 13. 291, bearing 294 and shaft 281 are separated from the movable side template 240 by the forward movement.

Therefore, even after the rotating member 280 rotates and the rotating template member 260 changes its angle, the rotating template member 260 and the movable side template 240 are in a non-contact state, so that a friction phenomenon due to contact does not occur. .

Hereinafter, a method of manufacturing an injection product having a hollow shape by operating a rotary multiple injection mold according to an embodiment of the present invention will be described in detail with reference to FIGS. 14 to 27.

14 to 25 are views sequentially showing a method of manufacturing an injection product having a hollow shape by using a rotary multiple injection mold according to an embodiment of the present invention, Figure 14 is an embodiment of the present invention incorporated Fig. 15 is a perspective view showing a state in which molten resin is injected into a first cavity and a second cavity of a rotary multi-injection mold through a first hot runner, respectively, Fig. 15 is an enlarged view of the rotatable die member region of Fig. 14, Fig. 16 is a perspective view of the rotary multi-injection mold of FIG. 14 primarily, FIG. 17 is a perspective view of the rotary multi-injection mold according to an embodiment of the present invention of FIG. Fig. 19 is a perspective view showing a state in which the rotating die member of the mold is rotated 120 degrees in a counterclockwise direction, Fig. 19 is a perspective perspective view of the movable side mold of the rotary multiple injection mold of Fig. 18, and Fig. 20 is a ash. Perspective state diagram illustrating a state in which molten resin is injected for mutual bonding of a first injection molding and a second injection molding through a second hot runner of a rotary multi-injection mold according to an embodiment of the present invention; FIG. 21 Is an enlarged view of the rotatable die member region of FIG. 20, FIG. 22 is a perspective view of the rotary multiple injection mold of FIG. 20 secondaryly, FIG. 23 is a perspective view of the rotary multiple injection mold of FIG. An enlarged perspective view of a first fixed core region showing a state in which a slat core pin coupled to one end of an injection molding is separated; FIG. 25 is a state in which the coalesced injection molding of FIG. 24 is taken out from the first fixed core by using a takeout member. 26 is a perspective view of the coalesced injection molding taken out, and FIG. 27 is an injection having a hollow shape finally completed by removing unnecessary portions of the coalescence injection molding. Product is a perspective view.

A method of manufacturing an injection product having a hollow shape by operating a rotary multi-injection mold according to an embodiment of the present invention may first include a first recessed cavity 142a and a first protruding cavity (as shown in FIGS. 14 and 15). 262a are combined to form a cavity corresponding to the shape of the first injection molding 10, and the second protruding cavity 144a and the second recessed cavity 264a are combined to correspond to the shape of the second injection molding 20. The fixed side mold 100 and the movable side mold 200 are coalesced, ie, closed, so that the cavity is formed. Then, using the first hot runner 125a of the hot runner system 125, the molten resin in the cavity corresponding to the shape of the first injection molding 10 and the cavity corresponding to the shape of the second injection molding 20, respectively. Inject The injected hot molten resin can be efficiently cooled by the fixed side coolant channel 148, the movable side coolant channel 268 and the coolant hose 269 shown in FIGS. 4 and 7.

At this time, the second hot runner 125b is closed by a known open / close valve system (not shown). In addition, as shown in FIG. 14, when the fixed side mold 100 and the movable side mold 200 are coalesced, that is, closed, the rotary die member 260 as shown in FIG. 12 by contact with the fixed side template 140. Maintains contact with the movable side template 240.

Then, as shown in FIGS. 16 and 17, the fixed side mold 100 and the movable side mold 200 are separated from each other. The first injection molded product 10 is attached to the first fixed core 142 of the mold-side fixing side mold 100 by the movable side take-out block 262d, and the second rotating core of the movable side mold 200 ( 264, the 2nd injection molding 20 is attached by the fixed side extraction block 144d.

When the stationary side mold 100 and the movable side mold 200 are separated or opened, the rotating die member 260 whose contact with the stationary side template 140 is released as shown in FIG. 13 is the above-mentioned vertically moving member 290. ) To be separated from the movable side template 240 by a predetermined distance. That is, the rotating die member 260 is separated from the movable side template 240 by the bearing housing 291, the bearing 294, and the shaft 281 moving forward due to the elastic force of the housing spring 296.

Then, as shown in FIGS. 18 and 19, the rotating template member 260 is rotated 120 degrees counterclockwise by the rotating member 280, and the second rotating core 264 to which the second injection molding 20 is attached is formed. The first injection molding 10 is positioned on the upper side of the first fixing core 142 to which the injection molding 10 is attached. Since the rotation template member 260 is separated from the movable side template 240 by the vertical movement member 290 during the rotational movement, the friction phenomenon due to the contact rotation does not occur. In addition, even as shown in FIGS. 7 and 8, the coolant hose 269 connected to the movable side coolant channel 268 does not interfere with other components.

Then, as shown in FIGS. 20 and 21, the fixed side mold 100 and the movable side mold 200 are reintegrated, ie, closed, so that the edges of the first injection molding 10 and the second injection molding 20 are changed. Molten resin is injected into the contact rim using the second hot runner 125b, the cold runner 142c and the cold cate 142d of the hot runner system 125 to bond the contact rims together. At this time, the first hot runner 125a is closed by a known open / close valve system (not shown).

When the injection of the molten resin to the contact edge is completed, as shown in Figs. 22 and 23, the fixed side mold 100 and the movable side mold 200 are re-separated from each other. The mold injection molding 30 is attached to the first fixing core 142 of the fixing-side mold 100 by the slide core pin 164 which is kept extended downward.

Then, in order to take out the coalesced injection molding 30 from the first fixed core 142, first, the slide core pin 164 is shrunk upward as shown in FIG. 24 to receive it from the hollow of the coalesced injection molding 30. Release it.

Thereafter, as shown in FIG. 25, when the mill pin 156 of the blowout member 150 is advanced, the coalescence injection molding 30 shown in FIG. 26 is taken out from the first fixing core 142.

Thereafter, removing the unnecessary portion of the coalescence injection molding 30 and completing the shape processing, finally, the injection product 50 to be manufactured through the rotary die injection mold 1 according to an embodiment of the present invention is completed. do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And falls within the scope of the invention.

1: Rotary Multi-Injection Mold 10: First Injection Molded Product
20: second injection molding 30: coalescence injection molding
50 injection molding 100 fixed-side mold
110: first fixing plate 112: injection machine nozzle inlet
120: first manifold template 122: manifold receiving portion
125: hot runner system 125a: first hot runner
125b: second hot runner 126: sprue
127: manifold 128: hot nozzle
130: first spacer 140: fixed side template
142: first fixed core 142a: first recessed cavity
142c Cold Runner 142d Cold Gate
144: second fixing core 144a: second protruding cavity
144d: fixed side take-out block 145: rotating core avoidance groove
146: coater 147: guide pin receiving groove
148: fixed side cooling water channel 150: blowout member
152: compact 154; Plate cylinder
156: Milpin 158: Return Pin
160: slide core member 162: slide core body
164: slide core pin 166: guide rail
168: slide core cylinder 200: movable side mold
210: second fixing plate 230: second spacer
240: movable side template 242: shaft through hole
244: Ball bushing fastening hole 245: Housing spring receiving groove
246: rotating template stopper 247: guide pin
260: rotatable die member 261: rotatable die stopper guide groove
262: first rotating core 262a: first protruding cavity
262d: movable side extraction block 262e: extraction spring
264: second rotating core 264a: second recessed cavity
265: fixed core avoidance groove 266: cotter socket
267: shaft fastener
268: movable side coolant channel 269: coolant hose
280: rotating member 281: shaft
281a: Bearing lubricant injection hole 283: Bracket fixing plate
284 cylinder bracket 289 rack gear liner
286: Stopper Bracket 287: Rack Gear Stopper
288: rotating gear member 288a: power lock
288b: Spur Gears 288c: Rack Gears
288d: rack gear cylinder 290: up and down moving member
291: bearing housing 292: slide bar
293: ball bush 294: bearing
295 bearing nut 296 housing spring

Claims (15)

A fixed-side mold having a hot runner system formed therein, the fixed-side cavity having at least two different shapes of fixed-side cavities formed at a predetermined angle with respect to the upper center part, and
Movable side molds which are disposed to face each other so as to be integrated or separated from the fixed side mold, and are formed such that at least two different shapes of movable side cavities corresponding to the fixed side cavity are formed at a predetermined angle with respect to the upper center portion.
Including;
The movable side mold
Movable side template,
The movable side cavity is formed at an upper portion, protrudes from the movable side template toward the fixed side template, and is separated from the movable side template at predetermined intervals when separated from the fixed side mold, and rotated at a predetermined angle. This rotatable template member,
A vertically moving member having an elastic member that provides an elastic force to the rotating template member from the rear of the rotating template member, and
A rotating member for rotating the rotating template member at a predetermined angle
Containing
Rotary multi injection mold. In claim 1,
The movable side template is formed with a shaft through hole in the center,
The rotating member includes a shaft fastened to the shaft through hole,
The elastic member provides an elastic force to the shaft
Rotary multi injection mold. In claim 2,
The vertical movement member
At least one bearing received in an inner diameter to be coupled to an outer diameter of the shaft, and
Bearing housing for transmitting the elastic force of the elastic member to the shaft through the bearing
Containing more
Rotary multi injection mold. 4. The method of claim 3,
The vertical movement member
A slide bar for mutually fixing the bearing housing and the rotating member between the bearing housing and the rotating member;
A ball bush fixedly coupled to the movable side template to accommodate the slide bar to guide forward or backward movement of the slide bar.
Further comprising
Rotary multi injection mold. In claim 4,
The movable side template
A ball bushing fastening hole and a receiving groove for receiving the elastic member are further formed on the front edge of the shaft through hole, respectively.
Rotary multi injection mold. 4. The method of claim 3,
The bearing is provided so that the front end is caught on the step of the shaft,
The vertical movement member
Bearing nut fastened to the outer diameter of the shaft at the rear of the bearing
Further comprising
Rotary multi injection mold. 4. The method of claim 3,
If there are more than one bearing
Bearing engaging jaw protruding inward from the inner diameter of the bearing housing so that the plurality of bearings are separated from each other
Containing more
Rotary multi injection mold. In claim 1,
The movable side template
Further comprising a rotary template stopper protruding from the upper surface to limit the rotation angle of the rotary template member,
The rotating template member is
Receiving the rotary stopper on the rear side and the rotary template guide groove is further formed that both ends are caught by the rotary template stopper during rotation
Rotary multi injection mold. In claim 1,
The movable side mold
A fixed plate for fixing the movable side mold, and
A spacer accommodating the rotating member therein and fixedly coupling the movable side template to the fixed plate
Further comprising
Rotary multi injection mold. In claim 4,
The rotating member is
A rotary gear member for rotating the shaft, and
Further comprising a bracket fixing plate for fixedly coupling the rotary gear member to the slide bar.
Rotary multi injection mold. 11. The method of claim 10,
The rotary gear member
Rack gear cylinder,
Rack gear and spur gear for converting linear motion generated by the rack gear cylinder into rotational motion
Containing
Rotary multi injection mold. In claim 11,
The rotating member is
A cylinder bracket for fixing the rack gear cylinder to the bracket fixing plate, and
Rack gear stopper for limiting linear motion of the rack gear
Further comprising
Rotary multi injection mold. In claim 12,
The rotating member is
A rack gear liner fixed to the bracket fixing plate to guide the linear movement of the rack gear, and
Stopper bracket fixed to the bracket fixing plate to secure the rack gear stopper
Containing more
Rotary multi injection mold. In claim 1,
The rotating template member is
A coolant channel disposed inwardly adjacent to the movable side cavity from a side, and
Coolant hose connected to the coolant channel along a portion of the side circumference to supply coolant
Further comprising
Rotary multi injection mold. 4. The method of claim 3,
The shaft is penetrated from the rear end to the side is further formed with a bearing lubricant injection hole for supplying lubricant to the bearing
Rotary multi injection mold.

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