Injection mold for engineering plastics

Abstract

The invention relates to the field of injection molds, in particular to an injection mold for engineering plastics, comprising a rotating convex mold, a rotating shaft, a first die, a second die, a third die, a fourth die, a fifth die and a sixth die, wherein the rotating convex mold is in a hexagonal columnar structure, the rotating convex mold is fixedly connected with a rotating shaft in the middle thereof, the two ends of the rotating shaft are located outside the upper and lower outer surfaces of the rotating convex mold, and the rotating convex mold is matched with the first die, the second die, the third die, the fourth die, the fifth die and the sixth die respectively; the invention changes the injection mold from a traditional cubic structure consisting of a convex mold and a die into an integral mold consisting of a hexagonal columnar rotating convex mold and the first die, the second die, the third die, the fourth die, the fifth die and the sixth die respectively, so that the number of injection molded products is increased when performing one injection, thereby achieving the purpose of increasing production efficiency.

Description

Technical Field

[0001] The invention relates to the field of injection moulds, in particular to an injection mould for engineering plastics. Background Art

[0002] Engineering plastics refer to industrial plastics used as industrial parts or shell materials. They are plastics with excellent strength, impact resistance, heat resistance, hardness and aging resistance. They generally refer to plastics that can withstand certain external forces and have good mechanical properties and dimensional stability. They can still maintain their excellent performance at high and low temperatures and can be used as plastics for engineering structural parts. When testing the performance of a certain engineering plastic, test pieces of various shapes are involved. Engineering plastic test pieces are made of mold injection.

[0003] Generally, when plastic molding is performed through injection molds, most of the molds nowadays are square structures. In the social demand for high production, only one punch and one die can be used together for injection molding at a time. The number of products produced by one injection molding is certain, and it can only be completed by one punch and one die. The efficiency is low and cannot meet the needs of large-scale production.

[0004] In view of this, in order to overcome the above technical problems, the present invention designs an injection mold for engineering plastics to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing molds often only have one male mold and one female mold for injection molding at a time, and the number of products produced by one injection molding is fixed, which can only be completed by one male mold and one female mold. This production method is often inefficient and cannot meet the needs of large-scale production.

[0006] In order to solve the above problems, the present invention provides the following technical solutions:

[0007] The present invention provides an injection mold for engineering plastics, comprising a rotating punch, a rotating shaft, a first die, a second die, a third die, a fourth die, a fifth die and a sixth die, wherein the rotating punch is a hexagonal columnar structure, a rotating shaft is fixedly connected to the middle of the rotating punch, and both ends of the rotating shaft are located outside the upper and lower outer surfaces of the rotating punch, and the rotating punch is matched with the first die, the second die, the third die, the fourth die, the fifth die and the sixth die respectively.

[0008] Preferably, the No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies are rotatably connected with a universal shaft in the middle, and the No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies are connected through the universal shaft, and a gear is fixedly connected to the universal shaft, and the No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies are fixedly connected with a rack, and the rack cooperates with the gear.

[0009] Preferably, the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die are in an equilateral trapezoidal structure, and the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die cooperate with the rotating punch, and the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die are adjacent to each other.

[0010] Preferably, a threaded hole is provided in the universal shaft, and a screw rod is rotatably connected to the universal shaft, and the screw rod is located in the threaded hole.

[0011] Preferably, a sliding groove is provided in the universal shaft, the sliding groove is on the upper and lower sides of the threaded hole and is connected to the threaded hole, a sliding block is slidably connected in the sliding groove, a magnetic controller is fixedly connected to the outer surface of the universal shaft located above the sliding groove, and grooves are provided on the outer surfaces of both ends of the screw.

[0012] Preferably, the magnetic controller is provided with a protective cover, the protective cover is rotatably connected to the outer surface of the universal shaft, the inner surface of the protective cover is fixedly connected to a motor, a No. 1 bevel gear is fixedly connected to the output shaft of the motor, a No. 2 bevel gear is fixedly connected to the middle of the screw, and the No. 2 bevel gear cooperates with the No. 1 bevel gear.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. By changing the traditional cubic structure of the injection mold consisting of a punch and a die into an integral mold consisting of a hexagonal cylindrical rotating punch and No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies, for single-color injection, since the integral mold is equivalent to six punches and six dies, the production efficiency can be rapidly increased; for multi-color injection, after completing one injection, the rotating shaft is rotated to rotate the rotating punch, and No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies cooperate with it, thereby achieving the effect of improving production efficiency.

[0015] 2. By fixing a gear on the universal shaft and fixing racks on the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die, the movement of any one of the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die can drive the other dies to move at the same time, so as to achieve the effect of overall synchronous control of the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die.

[0016] 3. By designing the outer shapes of No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies to be equilateral trapezoidal structures, when the six dies cooperate with the punch for injection molding, the adjacent No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 dies can also cooperate with each other, so that the whole has better sealing performance and achieves the effect of easy pressure maintenance.

[0017] 4. By making the universal shaft into two sections, connecting them with a screw in the middle, and adjusting the length of the universal shaft by adjusting the screw, the distance between the No. 1 die, No. 2 die, No. 3 die, No. 4 die, No. 5 die and No. 6 die and the rotating punch after demolding can be increased to achieve the effect of facilitating demolding of the product.

[0018] 5. The length of the universal shaft is adjusted by the motor. When the motor rotates forward, the screw rotates clockwise and the length of the universal shaft becomes shorter; when the motor rotates reversely, the screw rotates counterclockwise and the length of the universal shaft becomes longer, thereby achieving an effect of easy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a top view of the mold of the present invention during injection molding;

[0021] Figure 2 This is the front view of the mold during injection molding of the present invention;

[0022] Figure 3 It is a schematic diagram of the position structure of the universal shaft when the mold is demoulded according to the present invention;

[0023] Figure 4 It is a partial schematic diagram of the universal shaft of the present invention.

[0024] In the figure: rotating punch 1, rotating shaft 2, No. 1 die 3, No. 2 die 4, No. 3 die 5, No. 4 die 6, No. 5 die 7, No. 6 die 8, universal shaft 9, threaded hole 91, slide groove 92, gear 10, rack 11, screw 12, groove 121, slider 13, magnetic controller 14, protective cover 15, motor 16, No. 1 bevel gear 161, No. 2 bevel gear 162. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] The present invention provides an injection mold for engineering plastics, comprising a rotating punch 1, a rotating shaft 2, a first die 3, a second die 4, a third die 5, a fourth die 6, a fifth die 7 and a sixth die 8, wherein the rotating punch 1 is a hexagonal columnar structure, the rotating shaft 2 is fixedly connected to the middle of the rotating punch 1, the two ends of the rotating shaft 2 are outside the upper and lower outer surfaces of the rotating punch 1, and the rotating punch 1 is matched with the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 respectively.

[0027] In traditional injection molds for engineering plastics, the injection molds are mostly of a cubic structure, and the injection molds are often composed of only one punch and one matching die. Therefore, one injection molding process can only be completed in this punch and one matching die, and the productivity is low. Therefore, when multi-color injection molding is required, the rotating shaft 2 is rotated so that the rotating punch 1 rotates and cooperates with the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8. For example, after the No. 1 die 3 completes the injection molding of one color, the rotating punch 1 is rotated clockwise and cooperates with the No. 2 die 4 to perform the injection molding of the second color. The rotating punch 1 is rotated again to cooperate with the No. 3 die 5 to perform the injection molding of the third color. By analogy, up to six colors of injection molding can be completed to achieve the effect of multi-color injection molding. At the same time, when the product only needs two or three colors of injection molding, the six dies can be grouped and injected at the same time, thereby achieving the effect of improving production efficiency.

[0028] As a specific embodiment of the present invention, the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 are rotatably connected with a universal shaft 9, the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 are connected through the universal shaft 9, the universal shaft 9 is fixedly connected with a gear 10, the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 are fixedly connected with a rack 11, and the rack 11 cooperates with the gear 10.

[0029] Since the integral mold is composed of a rotating convex mold 1 and a No. 1 die 3, a No. 2 die 4, a No. 3 die 5, a No. 4 die 6, a No. 5 die 7 and a No. 6 die 8, it is very troublesome to control the six dies one by one. Therefore, the present invention has a gear 10 fixedly connected to the universal shaft 9, and a rack 11 is fixedly connected to the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8. Pushing any one of the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to move can drive the remaining dies to move at the same time, as shown in the attached figure Figure 3 As shown, if the No. 1 die 3 is pushed to move toward or away from the rotating punch 1, the rack 11 fixedly connected to the No. 1 die 3 will drive the gear 10 fixedly connected to the universal shaft 9 in the No. 1 die 3 to rotate, and the gear 10 drives the rotation of the universal shaft 9, and the universal shaft 9 in the No. 1 die 3 rotates, thereby driving the universal shafts 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to rotate at the same time, and the universal shafts 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 drive the rotation of the universal shaft 9. The gear 10 thereon rotates. Since the gear 10 cooperates with the rack 11, the rotation of the gear 10 on the universal joint 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 drives the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to move towards or away from the rotating punch 1 at the same time as the No. 1 die 3, so as to achieve the effect of overall synchronous control of the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8.

[0030] As a specific embodiment of the present invention, the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 are in an equilateral trapezoidal structure, the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 cooperate with the rotating punch 1, and the first die 3, the second die 4, the third die 5, the fourth die 6, the fifth die 7 and the sixth die 8 are adjacent to each other.

[0031] During injection molding, in order to control the deformation amount and size of the product, it is very important to maintain the pressure in the injection mold. Since the injection mold of the present invention is composed of a male mold and six female molds, the present invention designs the outer shapes of No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 to be an equilateral trapezoidal structure. When No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 cooperate with the rotating male mold 1 for injection molding, the adjacent two female molds of No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 can be interlocked with each other, so that No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 have better sealing when injecting with the rotating male mold 1, thereby achieving the effect of easy pressure maintenance.

[0032] As a specific implementation of the present invention, a threaded hole 91 is opened in the universal shaft 9 , and a screw rod 12 is rotatably connected to the universal shaft 9 , and the screw rod 12 is located in the threaded hole 91 .

[0033] For different plastic products, the sizes of the products are different. When the injection molded product is too large, the mold of the present invention is not convenient for demoulding the larger product. Figure 4 As shown, the present invention divides the universal shaft 9 into two sections from the middle, uses a screw 12 to threadedly connect them, and adjusts the distance between the left and right ends of the universal shaft 9 by rotating the screw 12, thereby realizing the adjustment of the overall length of the universal shaft in the die, so as to adjust the distance between the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 and the rotating punch 1 during demolding, thereby achieving the effect of facilitating demolding.

[0034] As a specific embodiment of the present invention, a slide groove 92 is opened in the universal shaft 9, and the slide groove 92 is located on the upper and lower sides of the threaded hole 91 and is connected to the threaded hole 91. A slider 13 is slidably connected in the slide groove 92, and a magnetic controller 14 is fixedly connected to the outer surface slide groove 92 on the universal shaft 9, and grooves 121 are opened on the outer surfaces of both ends of the screw 12.

[0035] After the screw 12 is adjusted, since the screw 12 and the universal shaft 9 are connected by a threaded rotation and the universal shaft 9 itself also needs to rotate, the screw 12 tends to rotate with the rotation of the universal shaft 9. The present invention provides a slide groove 92 in the universal shaft 9, places a slider 13 in the slide groove 92, and then provides grooves 121 at both ends of the screw 12. When the screw 12 needs to be adjusted, the magnetic controller 14 is controlled to make the slider 13 move in the direction of the magnetic controller 14 and slide out of the groove 121 to facilitate the rotation of the screw 12; when the screw 12 is adjusted, the magnetic controller 14 is controlled to make the slider 13 move in the direction of the screw 12, so that the slider 13 is stuck in the groove 121, thereby fixing the screw 12 to achieve the effect of preventing the screw 12 from rotating with the rotation of the universal shaft 9.

[0036] As a specific embodiment of the present invention, a protective cover 15 is provided outside the magnetic controller 14, and the protective cover 15 is fixedly connected to the outer surface of the universal joint 9. The inner surface of the protective cover 15 is rotatably connected to a motor 16, and the motor 16 is electrically connected to an external power supply. A first bevel gear 161 is fixedly connected to the output shaft of the motor 16, and a second bevel gear 162 is fixedly connected to the middle of the screw 12, and the second bevel gear 162 cooperates with the first bevel gear 161.

[0037] When adjusting the length of the universal shaft 9 by means of the screw rod 12, it is very inconvenient to rotate the screw rod 12. Therefore, the present invention adjusts the length of the universal shaft 9 by means of the motor 16. The motor 16 is started, and the output shaft of the motor 16 drives the first bevel gear 161 to rotate. Since the first bevel gear 161 is meshed with the second bevel gear 162, the first bevel gear 161 drives the second bevel gear 162 to rotate. Since the second bevel gear 162 is fixedly connected to the screw rod 12, the second bevel gear 162 drives the screw rod 12 to rotate. Since the thread directions of the two ends of the screw rod 12 are opposite, when the motor 16 rotates forward, the screw rod 12 rotates clockwise, and the length of the universal shaft 9 becomes shorter. When the motor 16 rotates reversely, the screw rod 12 rotates counterclockwise, and the length of the universal shaft 9 becomes longer, thereby achieving an effect of easy adjustment.

[0038] like Figure 3As shown, when both ends of the universal joint 9 become longer at the same time, the gears 10 at both ends of the universal joint 9 rotate. Since the gears 10 and the rack 11 are both oblique teeth, and the width of the rack 11 is greater than the thickness of the gear 10 and the sum of the moving distance of the gear 10, the gear 10 is subjected to the radial force of the rack 11 while rotating. Therefore, the No. 1 die 3 drives the rack 11 to move upward and cooperate with the gear 10 to rotate, and the No. 1 die 3 is separated from the rotating punch 1. When both ends of the universal joint 9 become shorter at the same time, the gears 10 at both ends of the universal joint 9 rotate. While the gears 10 rotate, they are subjected to the radial force of the rack 11. The No. 1 die 3 drives the rack 11 to move downward and cooperate with the gear 10 to rotate. The No. 1 die 3 is combined with the rotating punch 1. Since it is driven by the No. 1 bevel gear 161 and the No. 2 bevel gear 162, the protective cover 15 on the outer surface of the universal joint 9 plays a protective role.

[0039] Working principle: In traditional injection molds for engineering plastics, the injection molds are mostly of cubic structure, and the injection molds are often composed of only one punch and one matching die. Therefore, one injection molding process can only be completed in this punch and one matching die, and the productivity is low. Therefore, when multi-color injection molding is required, the rotating shaft 2 is rotated to rotate the rotating punch 1 and cooperate with the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8. For example, after the No. 1 die 3 completes the injection molding of one color, the rotating punch 1 is rotated clockwise and cooperates with the No. 2 die 4 to perform the injection molding of the second color. The rotating punch 1 is rotated again to cooperate with the No. 3 die 5 to perform the injection molding of the third color. By analogy, up to six colors of injection molding can be completed to achieve the effect of multi-color injection molding. At the same time, when the product only needs two or three colors of injection molding, the six dies can be grouped for injection molding at the same time, thereby achieving the effect of improving production efficiency.

[0040] Since the integral mold is composed of a rotating convex mold 1 and a No. 1 die 3, a No. 2 die 4, a No. 3 die 5, a No. 4 die 6, a No. 5 die 7 and a No. 6 die 8, it is very troublesome to control the six dies one by one. Therefore, the present invention has a gear 10 fixedly connected to the universal shaft 9, and a rack 11 is fixedly connected to the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8. Pushing any one of the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to move can drive the remaining dies to move at the same time, as shown in the attached figure Figure 3As shown, if the No. 1 die 3 is pushed to move toward or away from the rotating punch 1, the rack 11 fixedly connected to the No. 1 die 3 will drive the gear 10 fixedly connected to the universal shaft 9 in the No. 1 die 3 to rotate, and the gear 10 drives the rotation of the universal shaft 9, and the universal shaft 9 in the No. 1 die 3 rotates, thereby driving the universal shafts 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to rotate at the same time, and the universal shafts 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 drive the rotation of the universal shaft 9. The gear 10 thereon rotates. Since the gear 10 cooperates with the rack 11, the rotation of the gear 10 on the universal joint 9 in the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 drives the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 to move towards or away from the rotating punch 1 at the same time as the No. 1 die 3, so as to achieve the effect of overall synchronous control of the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8.

[0041] During injection molding, in order to control the deformation amount and size of the product, it is very important to maintain the pressure in the injection mold. Since the injection mold of the present invention is composed of a male mold and six female molds, the present invention designs the outer shapes of No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 to be an equilateral trapezoidal structure. When No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 cooperate with the rotating male mold 1 for injection molding, the adjacent two female molds of No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 can be interlocked with each other, so that No. 1 female mold 3, No. 2 female mold 4, No. 3 female mold 5, No. 4 female mold 6, No. 5 female mold 7 and No. 6 female mold 8 have better sealing when injecting with the rotating male mold 1, thereby achieving the effect of easy pressure maintenance.

[0042] For different plastic products, the sizes of the products are different. When the injection molded product is too large, the mold of the present invention is not convenient for demoulding the larger product. Figure 4 As shown, the present invention divides the universal shaft 9 into two sections from the middle, uses a screw 12 to threadedly connect them, and adjusts the distance between the left and right ends of the universal shaft 9 by rotating the screw 12, thereby realizing the adjustment of the overall length of the universal shaft in the die, so as to adjust the distance between the No. 1 die 3, the No. 2 die 4, the No. 3 die 5, the No. 4 die 6, the No. 5 die 7 and the No. 6 die 8 and the rotating punch 1 during demolding, thereby achieving the effect of facilitating demolding.

[0043] After the screw 12 is adjusted, since the screw 12 and the universal shaft 9 are connected by a threaded rotation and the universal shaft 9 itself also needs to rotate, the screw 12 tends to rotate with the rotation of the universal shaft 9. The present invention provides a slide groove 92 in the universal shaft 9, places a slider 13 in the slide groove 92, and then provides grooves 121 at both ends of the screw 12. When the screw 12 needs to be adjusted, the magnetic controller 14 is controlled to make the slider 13 move in the direction of the magnetic controller 14 and slide out of the groove 121 to facilitate the rotation of the screw 12; when the screw 12 is adjusted, the magnetic controller 14 is controlled to make the slider 13 move in the direction of the screw 12, so that the slider 13 is stuck in the groove 121, thereby fixing the screw 12 to achieve the effect of preventing the screw 12 from rotating with the rotation of the universal shaft 9.

[0044] When adjusting the length of the universal shaft 9 by means of the screw rod 12, it is very inconvenient to rotate the screw rod 12. Therefore, the present invention adjusts the length of the universal shaft 9 by means of the motor 16. The motor 16 is started, and the output shaft of the motor 16 drives the first bevel gear 161 to rotate. Since the first bevel gear 161 is meshed with the second bevel gear 162, the first bevel gear 161 drives the second bevel gear 162 to rotate. Since the second bevel gear 162 is fixedly connected to the screw rod 12, the second bevel gear 162 drives the screw rod 12 to rotate. Since the thread directions of the two ends of the screw rod 12 are opposite, when the motor 16 rotates forward, the screw rod 12 rotates clockwise, and the length of the universal shaft 9 becomes shorter. When the motor 16 rotates reversely, the screw rod 12 rotates counterclockwise, and the length of the universal shaft 9 becomes longer, thereby achieving an effect of easy adjustment.

[0045] like Figure 3 As shown, when both ends of the universal joint 9 become longer at the same time, the gears 10 at both ends of the universal joint 9 rotate. Since the gears 10 and the rack 11 are both oblique teeth, and the width of the rack 11 is greater than the thickness of the gear 10 and the sum of the moving distance of the gear 10, the gear 10 is subjected to the radial force of the rack 11 while rotating. Therefore, the No. 1 die 3 drives the rack 11 to move upward and cooperate with the gear 10 to rotate, and the No. 1 die 3 is separated from the rotating punch 1. When both ends of the universal joint 9 become shorter at the same time, the gears 10 at both ends of the universal joint 9 rotate. While the gears 10 rotate, they are subjected to the radial force of the rack 11. The No. 1 die 3 drives the rack 11 to move downward and cooperate with the gear 10 to rotate. The No. 1 die 3 is combined with the rotating punch 1. Since it is driven by the No. 1 bevel gear 161 and the No. 2 bevel gear 162, the protective cover 15 on the outer surface of the universal joint 9 plays a protective role.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An injection mold for engineering plastics, comprising a rotating convex mold (1), a rotating shaft (2), a first concave mold (3), a second concave mold (4), a third concave mold (5), a fourth concave mold (6), a fifth concave mold (7) and a sixth concave mold (8), characterized in that: The rotary punch (1) is in a hexagonal columnar structure. A rotating shaft (2) is fixedly connected to the middle of the rotary punch (1). The two ends of the rotating shaft (2) are located outside the upper and lower outer surfaces of the rotary punch (1). The rotary punch (1) is respectively matched with a first die (3), a second die (4), a third die (5), a fourth die (6), a fifth die (7) and a sixth die (8); A universal shaft (9) is rotatably connected between the first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8); the first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8) are connected via the universal shaft (9); a gear (10) is fixedly connected to the universal shaft (9); a rack (11) is fixedly connected to the first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8); the rack (11) cooperates with the gear (10); The first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8) are in an equilateral trapezoidal structure; the first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8) cooperate with the rotating punch (1); and the first die (3), the second die (4), the third die (5), the fourth die (6), the fifth die (7) and the sixth die (8) are adjacent to each other; A threaded hole (91) is provided in the universal shaft (9), and a screw rod (12) is rotatably connected to the universal shaft (9), and the screw rod (12) is located in the threaded hole (91); The universal shaft (9) is provided with a slide groove (92), the slide groove (92) is located at the upper and lower sides of the threaded hole (91) and is connected to the threaded hole (91), a slider (13) is slidably connected in the slide groove (92), a magnetic controller (14) is fixedly connected to the outer surface of the universal shaft (9) located above the slide groove (92), and grooves (121) are provided on the outer surfaces of both ends of the screw rod (12); The magnetic force controller (14) is provided with a protective cover (15) on the outside. The protective cover (15) is rotatably connected to the outer surface of the universal shaft (9). The inner surface of the protective cover (15) is fixedly connected to a motor (16). A first bevel gear (161) is fixedly connected to the output shaft of the motor (16). A second bevel gear (162) is fixedly connected to the middle of the screw rod (12). The second bevel gear (162) matches the first bevel gear (161).

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