WO2023087500A1

WO2023087500A1 - Low-pressure injection mold

Info

Publication number: WO2023087500A1
Application number: PCT/CN2021/142835
Authority: WO
Inventors: 潘勇
Original assignee: 潘勇
Priority date: 2021-11-16
Filing date: 2021-12-30
Publication date: 2023-05-25
Also published as: ZA202204141B; CN113829574A

Abstract

Provided in the present invention is a low-pressure injection mold, comprising a movable mold and a fixed mold, wherein the movable mold is provided with a core, and the fixed mold is provided with a cavity, the core fitting with the cavity to form a mold cavity; a mounting chamber is provided in the movable mold, a main turbine is rotatably provided in the mounting chamber, and a main drive mechanism is provided in the mounting chamber and used to drive the main turbine to rotate in a forward or reverse direction; and the movable mold is provided with several first connecting air holes to allow the mounting chamber to be in communication with the mold cavity, and the movable mold is provided with several second connecting air holes to allow the mounting chamber to be in communication with the outside. The cooperation of the main turbine and the main drive mechanism can remove air between a surface material and the core, so that the surface material fits tightly with the core. This process is simple to operate and takes a short period of time. Moreover, when the main turbine rotates in a forward direction, some air in the mold cavity can be removed to reduce the air pressure in the mold cavity, so as to significantly reduce the injection molding pressure, which is conducive to improving the injection efficiency.

Description

A low pressure injection mold

technical field

The present invention relates to injection molds, in particular, to a low-pressure injection mold.

Background technique

At present, the Chinese patent with the notification number CN102975335B discloses a low-pressure injection mold, including a fixed mold, a core arranged on the fixed mold, and a fabric pressing mechanism arranged on the fixed mold. Compression device around the core. During use, the fabric is pressed by the fabric pressing mechanism arranged around the core. However, since the pressing devices of the fabric pressing mechanism are all independent modules, they need to be operated one by one during use, which takes a long time.

Contents of the invention

In view of this, the object of the present invention is to provide a low-pressure injection mold which has the advantage of being less time-consuming to use.

In order to solve the above technical problems, the technical solution of the present invention is: a low-pressure injection mold, including a movable mold and a fixed mold, a core is provided on the movable mold, and a cavity is opened on the fixed mold, when the movable mold When the mold is fastened with the fixed mold, the core and the cavity are matched to form a mold cavity, and an installation chamber is opened in the movable mold, and a main turbine is installed in the installation chamber for rotation. A main driving mechanism is provided in the chamber, and the main driving mechanism is used to drive the main turbine to rotate forward or reversely. The movable mold is provided with a number of connecting air holes one, and the connecting air holes one are used to drive the main turbine to rotate forward or reversely. The installation chamber communicates with the mold cavity, and the movable mold is provided with a plurality of connection air holes 2, and the connection air holes 2 are used to communicate the installation chamber with the outside world.

Through the above technical scheme, when it is necessary to use a low-pressure injection mold for injection molding production, the first step is to attach the fabric to the surface of the core, the second step is to control the moving mold to approach the fixed mold side through the power mechanism, and the third step is to When the Z-direction gap of the sealing surface between the movable mold and the fixed mold is 0.5mm-1mm, the power mechanism is suspended, and the main turbine is controlled by the main driving mechanism to rotate forward, so that the air between the fabric and the core is driven through the connecting air hole. Discharge, so that the fabric can stick to the core under pressure, the fourth step is to restart the power mechanism, and continue to control the moving mold to approach the side of the fixed mold through the power mechanism until the moving mold and the fixed mold are completely closed.

Through the cooperation of the main turbine and the main driving mechanism, the air between the fabric and the core can be drawn away, so that the fabric and the core are closely attached. This process is relatively simple to operate and takes less time. Furthermore, when the main turbine rotates in the forward direction, part of the air in the mold cavity can be drawn out to reduce the air pressure in the mold cavity, so that the injection pressure is significantly reduced, which helps to improve the injection molding efficiency.

When the injection molding production is completed, the dynamic mechanism is used to control the movable mold away from the fixed mold. When the movable mold is completely separated from the fixed mold, the injection-molded product is pushed away from the core through the ejection mechanism on the movable mold. The main driving mechanism controls the reverse rotation of the main turbine to push the air between the fabric and the core, so that the product can be separated from the core smoothly.

Preferably, the main driving mechanism includes a stator fixedly arranged in the installation chamber, a rotor rotatably arranged inside the stator, and the main turbine is fixedly connected to the rotor.

Through the above technical solution, the rotor can drive the main turbine to rotate after being electrified, so as to drive the air to flow. By changing the direction of the current through the rotor, the direction of rotation of the main turbine can be changed.

Preferably, the stator includes a support ring fixedly arranged in the installation chamber, and several magnetic steels evenly distributed on the inner wall of the support ring in the circumferential direction.

Through the above-mentioned technical solution, several magnetic steels cooperate with each other to drive the energized rotor to perform continuous circumferential rotation.

Preferably, the magnet is made of rare earth neodymium.

Through the above technical solution, the magnetic steel made of rare earth neodymium has strong magnetism, and can effectively drive the energized rotor to perform continuous circumferential rotation.

Preferably, the rotor includes a support frame and windings, the winding is wound on the outside of the support frame, and the main turbine is fixedly connected to the inside of the support frame.

Through the above technical solution, after the winding is energized, the main turbine can be driven to rotate in a circumferential direction through the support frame.

Preferably, the support frame includes several stacked silicon steel sheets.

Through the above technical scheme, silicon steel sheet is a kind of silicon-iron soft magnetic alloy with extremely low carbon content, generally containing 0.5-4.5% silicon, which is made by hot and cold rolling, with low iron loss rate and strong magnetic induction. Higher, the advantage of high stacking coefficient.

Preferably, each blade of the main turbine is provided with a vortex direction column, and the vortex direction column is located on a side of the main turbine close to the mold cavity.

Through the above technical solution, adding a vortex direction column to the blade of the main turbine can speed up the agitation of the air, making the air flow at a faster speed, and helping to improve the use efficiency of the low-pressure injection mold.

Preferably, the connecting air hole is provided with a supporting net near the opening of the mold cavity.

Through the above technical solution, the support net arranged at the connecting air hole-orifice can support the fabric, so that the fabric is not easy to be deformed, which helps to improve the yield of good products.

Preferably, an installation hole is provided through the center of the main turbine, and an auxiliary turbine is rotatably connected in the installation hole, and an auxiliary driving mechanism is arranged in the installation hole, and the auxiliary driving mechanism is used to drive the auxiliary turbine Forward rotation or reverse rotation.

Through the above technical solution, when in use, the secondary driving mechanism can be used to drive the secondary turbine to rotate in a circumferential direction. When the rotation direction of the auxiliary turbine is the same as that of the main turbine, the cooperation between the auxiliary turbine and the main turbine can make the air flow at a faster speed. When the rotation direction of the auxiliary turbine is opposite to that of the main turbine, the auxiliary turbine and the main turbine Turbo fit allows air to flow at a slower speed. Through the cooperation of the main turbine and the auxiliary turbine, it can be applied to different needs and improve the applicability of the low-pressure injection mold.

Preferably, the auxiliary drive mechanism includes an actuator motor, and the output shaft of the actuator motor is coaxially connected with the auxiliary turbine.

Through the above technical solution, when in use, the auxiliary turbine can be controlled to rotate in the circumferential direction by executing the motor.

Description of drawings

Fig. 1 is the structural representation of embodiment;

Figure 2 is an enlarged view of part A of Figure 1;

Figure 3 is a structural schematic diagram of the main turbine.

Reference signs: 1, moving mold; 2, fixed mold; 3, core; 4, cavity; 5, installation chamber; 6, main turbine; 7, main driving mechanism; 71, stator; 711, support ring; 712. Magnetic steel; 72. Rotor; 721. Support frame; 722. Winding; 8. Connection air hole one; 9. Connection air hole two; 10. Vortex direction column; 11. Support net; 12. Installation hole; ; 14, auxiliary drive mechanism.

Detailed ways

The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings, so as to make the technical solution of the present invention easier to understand and grasp.

A low-pressure injection mold, as shown in Figures 1 to 3, includes a movable mold 1 and a fixed mold 2, the movable mold 1 is provided with a core 3 on the end surface close to the fixed mold 2, and the fixed mold 2 is close to the edge of the movable mold 1 A cavity 4 is provided on the end surface. When the movable mold 1 and the fixed mold 2 are fastened together, the core 3 cooperates with the cavity 4 to form a cavity for molding products. One side of movable mold 1 away from fixed mold 2 is provided with ejector mechanism (not shown in the figure), and ejector mechanism is used for the product that molding is ejected from core 3.

An installation chamber 5 is provided in the movable mold 1 . The main driving mechanism 7 is arranged in the installation chamber 5 . The main driving mechanism 7 includes a stator 71 fixedly arranged in the installation chamber 5 , and a rotor 72 rotatably arranged inside the stator 71 . The stator 71 includes a support ring 711 fixedly arranged in the installation chamber 5 , and a plurality of magnetic steels 712 uniformly distributed in the circumferential direction on the inner wall of the support ring 711 , and the plurality of magnetic steels 712 are all made of rare earth neodymium. The rotor 72 includes a support frame 721 and a winding 722 . The supporting frame 721 includes a plurality of silicon steel sheets stacked. The winding 722 is wound on the outside of the support frame 721 . The main turbine 6 is fixedly connected to the inner side of the support frame 721 . Each blade of the main turbine 6 is provided with a vortex direction column 10 , and the vortex direction column 10 is located on the side of the main turbine 6 close to the mold cavity. A mounting hole 12 is provided through the center of the main turbine 6 . An auxiliary driving mechanism 14 is arranged in the mounting hole 12, and the auxiliary driving mechanism 14 is an executive motor. The output shaft of the executive motor is coaxially connected with an auxiliary turbine 13, and the executive motor can drive the auxiliary turbine 13 to rotate forward or reversely.

The movable mold 1 is provided with a plurality of connecting air holes one 8, one end of the connecting air holes one 8 communicates with the installation chamber 5, and the other end of the connecting air holes one 8 communicates with the mold cavity. A support net 11 is provided at the opening of the connecting air hole 1 near the cavity of the mold cavity.

The movable mold 1 is provided with several connecting air holes 9, one end of the connecting air holes 9 communicates with the installation chamber 5, and the other end of the connecting air holes 9 communicates with the outside world.

An installation chamber 5 is provided in the fixed mold 2 . A main drive mechanism 7 is arranged in the installation chamber 5 . The main driving mechanism 7 includes a stator 71 fixedly arranged in the installation chamber 5 , and a rotor 72 rotatably arranged inside the stator 71 . The stator 71 includes a support ring 711 fixedly arranged in the installation chamber 5 , and a plurality of magnetic steels 712 uniformly distributed in the circumferential direction on the inner wall of the support ring 711 , and the plurality of magnetic steels 712 are all made of rare earth neodymium. The rotor 72 includes a support frame 721 and a winding 722 . The support frame 721 includes a plurality of silicon steel sheets stacked. The winding 722 is wound on the outside of the supporting frame 721 . The main turbine 6 is fixedly connected to the inner side of the support frame 721 . Each blade of the main turbine 6 is provided with a vortex direction column 10 , and the vortex direction column 10 is located on the side of the main turbine 6 close to the mold cavity. A mounting hole 12 is provided through the center of the main turbine 6 . An auxiliary driving mechanism 14 is arranged in the mounting hole 12, and the auxiliary driving mechanism 14 is an executive motor. The output shaft of the executive motor is coaxially connected with an auxiliary turbine 13, and the executive motor can drive the auxiliary turbine 13 to rotate forward or reversely.

The fixed mold 2 is provided with a plurality of connecting air holes one 8, one end of the connecting air holes one 8 communicates with the installation chamber 5, and the other end of the connecting air holes one 8 communicates with the mold cavity. Connect air hole one 8 to be provided with support net 11 near the orifice place of die cavity.

The fixed mold 2 is provided with several connecting air holes 9, one end of the connecting air holes 9 communicates with the installation chamber 5, and the other end of the connecting air holes 9 communicates with the outside world.

The specific use process of a low-pressure injection mold is as follows: the first step is to paste the fabric on the surface of the core 3; the second step is to control the moving mold 1 to approach the fixed mold 2 through the power mechanism; When the gap in the Z direction of the sealing surface between mold 1 and fixed mold 2 is 0.5mm-1mm, the power mechanism is suspended, and the corresponding main turbine 6 is controlled to rotate forward through the main driving mechanism 7 inside the movable mold 1, driving the fabric and the mold. The air between the cores 3 is discharged through the connecting air hole 1, so that the fabric gradually sticks to the core 3. At the same time, the auxiliary turbine 13 is driven to rotate forward through the auxiliary drive mechanism 14 to speed up the air flow. The fourth step, Restart the power mechanism, continue to control the moving mold 1 to approach the fixed mold 2 side through the power mechanism, until the movable mold 1 and the fixed mold 2 are completely closed, the fifth step is to control the corresponding main turbine through the main driving mechanism 7 inside the fixed mold 2 6. Rotate in the forward direction to discharge the air inside the mold cavity and reduce the injection pressure. The sixth step is to inject the injection molding liquid into the mold cavity. The seventh step is to control the moving mold 1 away from Fixed mold 2, the eighth step, when the movable mold 1 is completely separated from the fixed mold 2, the main drive mechanism 7 inside the movable mold 1 controls the corresponding main turbine 6 to rotate in reverse, driving air into the fabric through the connecting air hole 1 Between the core 3 and the ninth step, the product is ejected through the ejection mechanism in the movable mold 1.

Of course, the above are only typical examples of the present invention. In addition, the present invention can also have other multiple specific implementation modes. All technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection claimed by the present invention. Inside.

Claims

A low-pressure injection mold, comprising a movable mold (1) and a fixed mold (2), the movable mold (1) is provided with a core (3), and the fixed mold (2) is provided with a cavity (4) , when the movable mold (1) is fastened with the fixed mold (2), the core (3) cooperates with the mold cavity (4) to form a mold cavity, which is characterized in that: the movable mold ( 1) is provided with an installation chamber (5), in which a main turbine (6) is rotated, and in which a main drive mechanism (7) is arranged, the The main driving mechanism (7) is used to drive the main turbine (6) to rotate forward or reversely, and the movable mold (1) is provided with a plurality of connecting air holes (8), and the connecting air holes (8) It is used to connect the installation chamber (5) with the mold cavity, and the movable mold (1) is provided with a number of connecting air holes (9), and the connecting air holes (9) are used to connect the installation The chamber (5) communicates with the outside world.
A low-pressure injection mold according to claim 1, characterized in that: the main drive mechanism (7) includes a stator (71) fixedly arranged in the installation chamber (5), a stator (71) rotatably arranged in the stator (71) The inner rotor (72) to which the main turbine (6) is fixedly connected.
A low-pressure injection mold according to claim 2, characterized in that: the stator (71) includes a support ring (711) fixedly arranged in the installation cavity (5), uniformly distributed in the circumferential direction on the Several magnetic steels (712) at the inner wall of the support ring (711).
A low-pressure injection mold according to claim 3, characterized in that: said magnetic steel (712) is made of rare earth neodymium.
A low-pressure injection mold according to claim 2, characterized in that: the rotor (72) includes a support frame (721) and a winding (722), and the winding (722) is wound on the support frame (721) The outer side of the main turbine (6) is fixedly connected to the inner side of the support frame (721).
A low-pressure injection mold according to claim 5, characterized in that: the support frame (721) comprises several stacked silicon steel sheets.
A low-pressure injection mold according to claim 1, characterized in that: each blade of the main turbine (6) is provided with a vortex direction column (10), and the vortex direction column (10) is located at the The main turbine (6) is close to the side of the mold cavity.
A low-pressure injection mold according to claim 1, characterized in that: said connecting air hole one (8) is provided with a supporting net (11) near the opening of said mold cavity.
A low-pressure injection mold according to claim 1, characterized in that: a mounting hole (12) is provided through the center of the main turbine (6), and a secondary turbine (12) is rotatably connected in the mounting hole (12). 13), the installation hole (12) is provided with an auxiliary driving mechanism (14), and the auxiliary driving mechanism (14) is used to drive the auxiliary turbine (13) to rotate forward or reversely.
A low-pressure injection mold according to claim 9, characterized in that: the auxiliary driving mechanism (14) includes an actuator motor, and the output shaft of the actuator motor is coaxially connected with the auxiliary turbine (13).