CN107627550A - Two-color injection mold and method for controlling rotation position of mold core by rotating circular plate - Google Patents

Abstract

The invention provides a two-color injection mold and its method for controlling the rotation position of the mold core by rotating a circular plate, including a fixed mold fixed plate, a backing plate and a movable mold fixed plate arranged from top to bottom, and a connection between the movable mold fixed plate and the backing plate The center of the support ring is fixedly connected with the backing plate, and the rotating shaft is driven by the rotating shaft driving device to rotate. The upper end of the rotating shaft is fixedly connected with a rotating circular plate, and the rotating circular plate is fixedly connected with the first part for forming blanks and formed products. The first core and the second core, the upper part of the first core and the second core are set with a cavity fixing plate, the upper part of the cavity fixing plate is fixedly connected with a cavity insert set outside the blank, and the fixed mold fixing plate The lower surface is fixedly connected with a lining cavity, and the fixed plate of the fixed mold is fixedly connected with a fixed rod. The invention has a compact structure, can ensure the realization of one-mold two-color injection molding, and has high production efficiency.

Description

Two-color injection mold and method for controlling rotation position of mold core by rotating circular plate

technical field

The invention relates to a two-color injection mold for controlling the rotational position of a mold core by rotating a circular plate and a method thereof.

Background technique

Due to the different structural shapes of the two-color products, two molten plastics of different colors are injected into the mold sequentially from two injection points on the mold, so that the plastic parts can be injection-molded in the same process. Therefore, it is very important to design a reasonable rotating mechanism. Since the injection points of the two-color mold are different, the accurate rotation from the inner lining to the outer layer is very critical. Two-color products are generally composed of inner lining and outer layer. At present, there is no efficient method for processing two-color products in China, and there is a dilemma of low work efficiency of traditional two-color molds.

Contents of the invention

The present invention improves the above problems, that is, the technical problem to be solved by the present invention is that the existing two-color injection molding has a complex structure and the working efficiency is low in the form of integral rotation of the movable mold.

The specific embodiment of the present invention is: a two-color injection mold for controlling the rotation position of the mold core by rotating a circular plate, including a fixed mold fixed plate, a backing plate and a movable mold fixed plate arranged from top to bottom, the movable mold fixed plate It is fixedly connected with the backing plate through a supporting ring, and the middle part of the supporting ring has a rotating shaft passing through the backing plate, and the rotating shaft is driven to rotate by the rotating shaft driving device, and a rotating circular plate is fixedly connected to the upper end of the rotating shaft, and the rotating circular plate is fixedly connected There are a first core and a second core for forming blanks and molded products, the upper part of the first core and the second core is covered with a cavity fixing plate, and the upper part of the cavity fixing plate is fixedly connected with a sleeve The cavity insert on the outside of the blank, the lower surface of the fixed mold fixed plate is fixedly connected with a liner cavity, and the liner cavity corresponds to the first core and the second core and has the same structure as the first core and the second core. The two cores cooperate to form the mold cavity of the blank and the product. The side of the fixed mold fixed plate has a first injection port corresponding to the blank forming station, and the top of the fixed mold fixed plate has a second injection port corresponding to the molded product station. At the injection port, a fixed rod is fixedly connected to the fixed mold fixed plate, the lower end of the fixed rod penetrates through the mold cavity fixed plate, and the lower end of the fixed rod is provided with a stopper to prevent the mold cavity fixed plate from descending.

Further, the middle part of the first core and the second core has a ejector rod, the lower part of the ejector rod is provided with a flange and placed on the top of the backing plate, and the middle part of the first core and the second core has a housing The through hole of the push rod, the outside of the push rod is provided with a return spring, one end of the return spring is pressed against the first core or the second core, the other end of the spring is pressed against the flange, and the inside of the support ring The corresponding molding product station has a driving cylinder for abutting the ejector pin.

Further, the rotating shaft driving device is a motor, and the output shaft of the motor drives the rotating shaft to rotate through a gear transmission mechanism.

Further, the outer surface of the cavity insert has a spiral cooling water channel inside, and the cavity clamping ring is sleeved on the outside of the cavity insert, and the cavity clamping ring has a Cooling water connection.

The present invention also includes a method for a two-color injection mold for controlling the rotational position of a mold core by rotating a circular plate, using the above-mentioned two-color injection mold for controlling the rotational position of a mold core by rotating a circular plate, and the specific steps are as follows:

(1) In the mold closing state, inject molding into the first injection port to form a blank between the outer periphery of a core and the inner cavity;

(2) The moving mold fixing plate drives the support ring, the backing plate, the first core and the second core to go down, and the membrane cavity fixing plate also goes down synchronously under the action of gravity. The fixed mold fixing plate is fixedly connected with a fixing rod, The lower end of the fixed rod runs through the mold cavity fixed plate and the lower end of the fixed rod is provided with a block that blocks the downward movement of the mold cavity fixed plate. After the impact, the fixed plate of the lower membrane cavity drives the cavity insert to stop;

(3) The rotating shaft drives the rotating circular plate together with the first core and the second core to turn 180°, and the blank formed on the first core moves synchronously to the station of the molded product, which is under the second injection port. The core moves to the original position of the first core and continues to close the mold;

(4) The surface between the blank, the cavity insert and the lining cavity is re-injected to form a two-color injection molded product, and at the same time, the coolant is passed into the cooling water flow channel to speed up the molding and cooling; the second core is injection-molded blank;

(5) After the mold is opened, the driving cylinder pushes the ejector rod upward to push out the product to unload, and then the rotating shaft drives the rotating circular plate to continue turning 180° and reset.

Compared with the prior art, the present invention has the following beneficial effects: the present invention is simple in structure, and can quickly realize the conversion of the positions of the first core and the second core by using the fixed mold fixed plate and the movable mold fixed plate structure arranged vertically so as to quickly It is convenient to achieve two-color injection molding, and the ejector mechanism is integrated in the mold to automatically unload the material, and the structure is compact.

Description of drawings

Fig. 1 is a structural schematic diagram of the mold clamping state of the present invention.

Fig. 2 is a schematic diagram of the structure of the mold opening state of the present invention, and the right part is the state where the movable mold is at the lowest position.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 2, a two-color injection mold for controlling the rotation position of the mold core by rotating a circular plate includes a fixed mold fixed plate 10, a backing plate 30 and a movable mold fixed plate 20 arranged from top to bottom. The mold fixing plate 20 and the backing plate 30 are fixedly connected through the supporting ring 210. The middle part of the supporting ring 210 has a rotating shaft 40 passing through the backing plate. The rotating shaft 40 is driven to rotate by the rotating shaft driving device. In this embodiment, the described The rotating shaft driving device is a motor, the output shaft of the motor 410 is fixed with a driving gear, the rotating shaft 40 has a driven gear meshed with the driving gear, the output shaft of the motor 410 rotates to drive the driven gear to rotate, thereby driving the rotation 40 To rotate, the motor is a 410 servo motor, which rotates 180° each time.

In the actual design, the cylinder can also be used to drive the rack to drive the rotation of the shaft.

The upper end of the rotating shaft 40 is fixedly connected with a rotating circular plate 50, and the rotating circular plate 50 is fixedly connected with a first core 610 and a second core 620 for forming blanks and molded products, and the first core 610 and the second core The cores 620 have the same structure, and the first core 610 and the second core 620 correspond to two stations.

The upper part of the first core 610 and the second core 620 is covered with a film cavity fixing plate 70, and the upper part of the cavity fixing plate is fixedly connected with a cavity insert 710 set outside the blank, and the fixed mold is fixed. The lower surface of the plate 10 is fixedly connected with a liner cavity 110. In the initial state, a blank is formed between the first core 610 and the liner cavity 110. The outer surface between the lining cavities 110 is re-injected to form a two-color injection molded product. The side of the fixed mold fixed plate has a first injection port 101 corresponding to the molding blank station, and the top of the fixed mold fixed plate has a corresponding molding product station. The second injection port 102.

The first injection port 101 communicates with the cavity for molding the blank, and the second injection port 102 is used for molding the finished product. In this embodiment, the first injection port 101 is arranged horizontally, while the second injection port 102 is arranged vertically.

In order to facilitate unloading, the middle part of the first core 610 and the second core 620 has a push rod 630, the lower part of the push rod 630 is provided with a flange 631 and placed on the top of the backing plate, the first core and the second core The middle part of the second core has a through hole for accommodating the push rod, and the outside of the push rod is provided with a return spring 640. One end of the return spring 640 is pressed against the first core or the second core, and the other end of the spring is pressed against the top. In the flange 631, the corresponding molding product station in the support ring has a driving cylinder 650 for resisting the ejector rod, and the upper end of the telescopic rod of the driving cylinder 650 is correspondingly arranged on the molding product station, that is, the top of the mold cavity insert 710. At the lower end of the rod 630, when the telescopic rod is extended, the ejector rod 630 is pushed against by the telescopic rod so as to push the product to be unloaded.

In order to realize rapid prototyping in the secondary injection molding process, the outer surface of the cavity insert 710 has a spiral cooling water flow channel 711 inside, and a cavity clamping ring 712 is set on the outside of the cavity insert. The clamping ring has a cooling water interface 713 communicating with the cooling water channel.

In this embodiment, the motor 410 and the driving cylinder 650 are fixedly connected to the fixed plate 10 of the fixed mold.

During work, (1) under the mold clamping state, inject into the first injection port 101 to form a blank between the outer periphery of a core 610 and the inner liner cavity 110;

(2) The fixed plate of the movable mold drives the support ring, backing plate, the first core and the second core to go down, and the fixed plate of the membrane cavity also goes down synchronously under the action of gravity. The fixed plate of the fixed mold is fixedly connected with a fixed rod 120 , the lower end of the fixing rod 120 runs through the mold cavity fixing plate 70 and the lower end of the fixing rod is provided with a block that blocks the downward movement of the mold cavity fixing plate. After being affected by the stopper, the lower membrane cavity fixed plate drives the cavity insert to stop;

(3) The rotating shaft drives the rotating circular plate 50 together with the first core and the second core to rotate 180°, and the blank formed on the first core moves synchronously to the station of the molded product, which is under the second injection port 102. The second core moves to the original position of the first core and continues to close the mold;

(4) The outer surface between the blank, the cavity insert 710 and the lining cavity 110 is re-injected to form a two-color injection molded product, and at the same time, the cooling liquid is passed into the cooling water flow channel to speed up the molding and cooling; the second core is injection-molded into the blank pieces;

(5) After the mold is opened, the driving cylinder pushes the ejector rod upward to push out the product to unload, and then the rotating shaft drives the rotating circular plate to continue turning 180° and reset.

Unless otherwise stated in any technical solution disclosed in the present invention, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred numerical range is only Among the many practicable numerical values, the technical effect is relatively obvious or representative. Since there are too many numerical values to list exhaustively, the present invention only discloses some numerical values to illustrate the technical solution of the present invention, and the numerical values listed above should not constitute limitations on the protection scope of the present invention.

If words such as "first" and "second" are used herein to define components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the components. Unless otherwise stated, the above words have no special meanings.

At the same time, if the above-mentioned invention discloses or relates to parts or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, using bolts or screws), or It is understood as: non-detachable fixed connection (such as riveting, welding), of course, mutual fixed connection can also be replaced by an integrated structure (such as manufactured by casting process) (except that it is obviously impossible to use integral forming process).

In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in the present invention to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them.

Any component provided by the present invention can be assembled from multiple individual components, or can be a single component manufactured by integral forming process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (5)

1. a kind of two-colored directed graph for rotating plectane control mold cores turned position, it is characterised in that including from top to bottom setting Cover half fixed plate, backing plate and the dynamic mould fixing plate put, are fixedly connected between the dynamic mould fixing plate and backing plate through support ring, described There is the rotating shaft through backing plate, the rotating shaft is driven by rotating shaft drive device and rotated, and rotating shaft upper end is fixedly connected in the middle part of support ring There is rotation plectane, it is described to rotate the first core and Second-Type being fixedly connected with plectane for moulded blank and shaped article Core, first core and the second core top are arranged with membrane cavity fixed plate, and the die cavity fixed plate top is fixedly connected with set Die cavity mold insert outside blank, the cover half fixed plate lower surface are fixedly connected with liner die cavity, and the liner die cavity is corresponding First core and the second core have the die cavity that blank and product are cooperatively formed with the first core and the second core, and the cover half is consolidated Fixed board sidepiece has the first injection hole of corresponding moulded blank station, has corresponding shaped article work at the top of the cover half fixed plate Second injection hole of position, fix bar is fixedly connected with the cover half fixed plate, die cavity fixed plate is run through in the fix bar lower end And fix bar lower end is provided with the block for stopping that die cavity fixed plate is descending.

2. the two-colored directed graph according to claim 1 for rotating plectane control mold cores turned position, it is characterised in that There is push rod in the middle part of first core and the second core, the push rod bottom is provided with flange and is placed in backing plate top, and described the There is the through hole for accommodating push rod, the push rod outer cover is provided with back-moving spring, the reset bullet in the middle part of one core and the second core Spring one end end is resisted against the first core or the second core, and the spring other end is resisted against flange, and corresponding be molded is produced in the support ring Product station has the drive cylinder for being used for supporting push rod.

3. the two-colored directed graph according to claim 2 for rotating plectane control mold cores turned position, it is characterised in that The rotating shaft drive device is motor, and the output shaft of the motor rotates through gear drive drive shaft.

4. the two-colored directed graph according to claim 3 for rotating plectane control mold cores turned position, it is characterised in that There are helical form cooling water flow conduits inside the die cavity mold insert outer surface, the die cavity mold insert outer cover is provided with die cavity clamping ring, There is the cooling water connector with cooling water flow conduits UNICOM on the die cavity clamping ring.

A kind of 5. method for the two-colored directed graph for rotating plectane control mold cores turned position, it is characterised in that using as weighed Profit requires a kind of two-colored directed graph of rotation plectane control mold cores turned position described in 4, comprises the following steps that：

(1) under matched moulds state, it is molded into the first injection hole, to form blank between a core periphery and liner die cavity；

（2）Dynamic mould fixing plate drive support ring, backing plate and the first core and the second core are descending, and membrane cavity is fixed under gravity Plate also DL synchronization, is fixedly connected with fix bar in the cover half fixed plate, the fix bar lower end through die cavity fixed plate and Fix bar lower end is provided with the block for stopping that die cavity fixed plate is descending, descending until blank upper surface and liner die cavity parting and satisfaction When unloading material space, bottom film chamber fixed plate drives die cavity mold insert to stop after being influenceed by block；

（3）Rotating shaft drives rotation plectane to turn over 180 ° together with the first core and the second core, and the blank being molded on the first core is same Moved further to the station of shaped article is below the second injection hole, and the second core is then moved to former first insert position, continues to close Mould;

(4) appearance between blank and die cavity mold insert and liner die cavity is molded to form double-shot moulding into product simultaneously to cold again But water flow passage is passed through coolant and accelerates to be molded cooling；Second core then injection molding blank；

（5）After die sinking, drive cylinder promotes push rod is up to release product discharging, and rotating shaft afterwards drives rotation plectane to continue to revolve through 180 °, reset.