Low pressure injection mold for automotive manufacturing

Abstract

The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection mold for automobile manufacturing and particularly relates to the technical field of injection molds. The application discloses a low-pressure injection

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molds, in particular to a low-pressure injection mold for automobile manufacturing. BACKGROUND

[0002] An injection mold is a special tool used in the injection molding process, which obtains a finished product by injecting heated and molten plastic into a mold cavity, cooling and solidifying. The injection mold is widely used in the production of plastic parts and products, and is particularly suitable for mass production of products with complex geometric shapes and high precision requirements, such as automobile parts, electronic housings, household appliances, toys, etc.

[0003] The existing low-pressure injection mold for automobile manufacturing is fixed on the injection molding machine during use, and then the driving mechanism on the injection molding machine drives the movable mold to move towards the fixed mold until the movable mold and the fixed mold are tightly closed to form a closed cavity. Then, the plastic particles are put into the injection molding machine for hot melting, and then the molten plastic melt is injected into the injection cavity through the pushing mechanism, and then flows into the cavity. After the plastic melt cools and solidifies, the mold is separated and the molded part is taken out, thereby completing the injection molding of the plastic part.

[0004] However, after the plastic melt is transported to the inside of the cavity through the injection cavity, part of the plastic melt remains in the inside of the injection cavity and is connected with the melt in the inside of the cavity, resulting in the formation of excess cylindrical protrusions on the surface of the part after the melt in the inside of the injection cavity cools and solidifies. This requires personnel to cut off the cylindrical protrusions formed on the surface of the part, increasing the consumption of manpower and time and affecting the processing efficiency of the plastic product. SUMMARY

[0005] The application is proposed to solve the problem that part of the plastic melt remains in the inside of the injection cavity and is connected with the melt in the inside of the cavity after the plastic melt is transported to the inside of the cavity through the injection cavity, resulting in the formation of excess cylindrical protrusions on the surface of the part after the melt in the inside of the injection cavity cools and solidifies. This requires personnel to cut off the cylindrical protrusions formed on the surface of the part, increasing the consumption of manpower and time and affecting the processing efficiency of the plastic product.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme: a low-pressure injection mold for automobile manufacturing, comprising a fixed mold and a movable mold, the movable mold is arranged on one side of the fixed mold, a top material rod is arranged in the inside of the fixed mold, a guide column is arranged on one side of the fixed mold, the surface of the guide column is slidably connected with the inner wall of the movable mold, an injection cavity is arranged on one side of the movable mold, and a cutting device for separating the melt remaining in the inside of the injection cavity from the melt in the inside of the cavity by rotating the material conveying pipe on one side of the movable mold is arranged.

[0007] The effects achieved by the above components are that: firstly, the fixed mold and the movable mold are fixed on the injection molding machine, then the movable mold is driven by the driving mechanism on the injection molding machine to move towards the fixed mold until the movable mold and the fixed mold are tightly closed to form a closed cavity, then the plastic particles are put into the injection molding machine for hot melting, then the melted plastic melt is injected into the injection cavity through the pushing mechanism and flows into the cavity, after the plastic melt is cooled and solidified, the mold is separated and the molded part is taken out, thereby completing the injection molding of the plastic part.

[0008] Preferably, the cutting device comprises a motor, the side of the movable mold close to the injection cavity is provided with an auxiliary groove, the inner wall of the auxiliary groove is connected with the inner wall of the injection cavity, the side of the movable mold is provided with a discharge hole, the motor is fixedly connected with the inner wall of the auxiliary groove, the output end of the motor is fixedly connected with a hole rod, the side of the hole rod is provided with a cooling device, the side of the hole rod is fixedly connected with a hollow rod, the side of the hollow rod is fixedly connected with a feeding pipe, the inner wall of the auxiliary groove is fixedly connected with an annular disc, the feeding pipe is arranged in the annular disc, the surface of the feeding pipe is attached to the inner wall of the annular disc, the side of the annular disc is provided with a first electric telescopic rod corresponding to the position of the discharge hole, and the inner wall of the annular disc is provided with a through hole coinciding with the inner wall of the injection cavity.

[0009] The effects achieved by the above components are that: by setting the cutting device, when the plastic melt is injected into the cavity through the injection cavity, the feeding pipe and the through hole, part of the melt is left in the feeding pipe, at this time the motor is started to drive the hole rod and the hollow rod to rotate, the hollow rod drives the feeding pipe to rotate along the inside of the annular disc, when the feeding pipe rotates to the position where the inner wall is separated from the inner wall of the through hole, the feeding pipe carries the residual melt away, so that it is separated from the melt in the cavity, and the melt is left in the feeding pipe under the sealing action of the annular disc at the opening position of the feeding pipe, when the melt is cooled and solidified in the feeding pipe, the feeding pipe is continuously rotated by the motor, the feeding pipe is rotated to the position where the inner wall corresponds to the first electric telescopic rod, the first electric telescopic rod is started to move and push the solidified plastic melt in the feeding pipe out, then the plastic melt is pushed out of the movable mold through the discharge hole, thereby achieving the cutting and cleaning of the residual melt in the injection cavity, reducing the situation that the residual plastic melt in the injection cavity is connected with the molded part in the cavity after being cooled and solidified, causing the formation of excess cylindrical protrusions on the surface of the part and the need for secondary cutting by personnel, improving the molding quality and processing efficiency of the plastic product.

[0010] Preferably, the side of the feeding pipe is fixedly connected with a cutting ring, the cutting ring is arranged in the inside of the annular disc, the surface of the cutting ring is tightly attached to the inner wall of the annular disc, and the surface of the cutting ring is larger than the inner wall of the through hole.

[0011] The effect achieved by the above components is that: by setting the cutting ring, the cutting ring can cut off the melt by cooperating with the movement of the conveying pipe, and the cutting ring can close the through hole when the conveying pipe rotates to the position away from the through hole, reducing the situation that the melt inside the cavity composed of the movable mold and the fixed mold flows out through the inside of the through hole.

[0012] Preferably, the hole rod away from the motor end is fixedly connected with a sleeve, one side of the annular disc is fixedly connected with a support column, the sleeve is sleeved on the surface of the support column, a plurality of first magnets are fixedly connected on the surface of the support column, the surface of the sleeve is fixedly connected with a cylinder, the inner wall of the cylinder is slidably connected with a spring rod, the other end of the spring rod is fixedly connected with the inner wall of the cylinder, one end of the spring rod is fixedly connected with a knocking block, the end of the spring rod away from the knocking block is fixedly connected with a second magnet, the first magnet and the second magnet are magnetically attracted, and the position of the knocking block corresponds to the position of the conveying pipe.

[0013] The effect achieved by the above components is that: by setting the knocking block, when the hole rod drives the sleeve to rotate synchronously during the rotation of the conveying pipe, the sleeve drives the cylinder to rotate, the cylinder drives the spring rod, the knocking block and the second magnet to rotate, when the second magnet rotates to the position corresponding to the first magnet, the first magnet attracts the second magnet, the second magnet moves towards the first magnet, and then the knocking block and the spring rod are driven by the second magnet and move towards the support column, when the second magnet rotates to the position away from the first magnet, under the reaction force of the spring in the spring rod, the spring rod pushes the knocking block to move towards the conveying pipe and knocks the surface of the conveying pipe, the knocking block repeatedly knocks the surface of the conveying pipe during the rotation of the conveying pipe, the conveying pipe vibrates under the impact of the knocking block, the plastic melt cooled and solidified inside the conveying pipe separates from the inner wall of the conveying pipe under the vibration, and the demolding efficiency of the plastic melt inside the conveying pipe is further improved.

[0014] Preferably, one side of the cylinder is fixedly connected with a rubber pad, the rubber pad is sleeved on the surface of the spring rod, one side of the conveying pipe is fixedly connected with a protrusion, and the position of the protrusion corresponds to the position of the knocking block.

[0015] The effect achieved by the above components is that: by setting the rubber pad, the rubber pad can separate the knocking block from the cylinder, reducing the direct collision between the knocking block and the cylinder during the reciprocating movement, and reducing the large wear on the surface of the cylinder, and the protrusion can replace the surface of the conveying pipe to contact the knocking block, reducing the damage to the surface of the conveying pipe caused by the collision of the knocking block, and improving the service life and anti-knocking performance of the conveying pipe.

[0016] Preferably, the cooling device comprises a liquid storage box containing cooling liquid, the liquid storage box is sleeved on the surface of the supporting rod, the liquid storage box is fixedly connected with the sleeve, one side of the liquid storage box is fixedly connected with a pipeline, the other end of the pipeline is fixedly connected with the hollow rod, the inner wall of the liquid storage box is slidably connected with a piston plate, one side of the piston plate is fixedly connected with a round rod, the surface of the round rod is slidably connected with the inner wall of the liquid storage box, the end of the round rod away from the piston plate is fixedly connected with a pressing plate, the pressing plate is sleeved on the surface of the hole rod, the inner wall of the hole rod is fixedly connected with a second electric telescopic rod, the output end of the second electric telescopic rod is fixedly connected with the pressing plate, and the surface of the material conveying pipe is fixedly connected with a circular cover.

[0017] The above-mentioned component achieves the effect that: by setting the cooling device, when the material conveying pipe carries the plastic melt inside it away from the position of the hole, the second electric telescopic rod is started to move the pressing plate in the direction close to the liquid storage box, the pressing plate cooperates with the round rod to push the piston plate inside the liquid storage box to move, the piston plate pushes the cooling liquid inside the liquid storage box into the pipeline by extruding, the cooling liquid is pushed into the hollow rod through the pipeline, and then enters the circular cover inside the hollow rod, so that the cooling liquid fully contacts with the surface of the material conveying pipe inside the circular cover, the temperature of the material conveying pipe is reduced, the auxiliary cooling of the plastic melt inside the material conveying pipe is achieved, the situation that the plastic melt has a high temperature and needs a long time to cool down inside the material conveying pipe is reduced, and the cooling efficiency and the material removal effect of the excess plastic melt inside the material conveying pipe are improved.

[0018] Preferably, the surface of the circular cover is provided with a plurality of reinforcing ribs, the reinforcing ribs are arranged at equal distances, and the reinforcing ribs are made of aluminum.

[0019] The above-mentioned component achieves the effect that: by setting the reinforcing ribs, the reinforcing ribs can increase the strength of the circular cover, reduce the situation that the circular cover deforms or breaks during use, and accelerate the conduction and volatilization of heat by using the characteristics of aluminum, thereby further improving the cooling efficiency.

[0020] Preferably, the surface of the pipeline is fixedly sleeved with a circular ring, and one side of the circular ring is fixedly connected with a reinforcing ring.

[0021] The above-mentioned component achieves the effect that: by setting the circular ring and the reinforcing ring, the circular ring cooperates with the reinforcing ring to connect a plurality of pipelines together and assist in supporting and limiting the plurality of pipelines, so as to reduce the large amplitude shaking and shaking of the pipelines during use, prevent the connection between the pipelines and the hollow rod from being separated, and improve the use stability of the pipelines.

[0022] Preferably, the side close to the round rod of the liquid storage box is fixedly connected with a sealing ring, the sealing ring is sleeved on the surface of the round rod, and the inner wall of the sealing ring is attached to the surface of the round rod.

[0023] The above-mentioned component achieves the effect that: by arranging the sealing ring, the sealing ring can fill and seal the gap between the round rod and the liquid storage box, so that the outflow of air or cooling liquid in the liquid storage box through the gap between the round rod and the liquid storage box is reduced.

[0024] Preferably, the surface of the hollow rod is provided with a semiconductor refrigerating sheet, the refrigerating end of the semiconductor refrigerating sheet is fixedly connected with the hollow rod, and the hot end of the semiconductor refrigerating sheet is connected with a heat dissipation fin.

[0025] The above-mentioned component achieves the effect that: by arranging the semiconductor refrigerating sheet, the semiconductor refrigerating sheet is formed by laminating a large number of P-type semiconductor and N-type semiconductor grains through an adhesive, forming a structure similar to a chip, when direct current passes through a thermocouple composed of P-type semiconductor and N-type semiconductor materials, due to the energy level difference of charge carriers in the materials, refrigeration and heat release phenomena occur at the two ends of the thermocouple, respectively, so that the temperature of the hollow rod in contact with the cold end of the semiconductor refrigerating sheet gradually decreases, and the cooling liquid flowing in the hollow rod is assisted to be cooled, so that the secondary cooling of the cooling liquid is realized, and the cooling effect of the cooling liquid on the plastic melt is improved.

[0026] In summary, the beneficial effects of the present application are:

[0027] By arranging the cutting device, the plastic melt remaining in the injection cavity can be separated from the plastic melt in the cavity, and after the melt is cooled, it is pushed out of the movable mold, so that the plastic melt is more perfectly filled in the cavity, the situation that the plastic melt remaining in the injection cavity is connected with the molded parts in the cavity after cooling and solidification, resulting in the formation of excess cylindrical protrusions on the surface of the parts and the need for secondary cutting by personnel, is reduced, and the molding quality and processing efficiency of the plastic products are improved.

[0028] By arranging the cooling device, the plastic melt in the conveying pipe can be assisted to be cooled, the cooling speed of the plastic melt in the conveying pipe is increased, the situation that the plastic melt is cooled for a long time in the conveying pipe due to the high temperature of the plastic melt is reduced, and the cooling efficiency and material removal effect of the excess plastic melt in the conveying pipe are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of the present application;

[0030] Figure 2 is a partial sectional view of the movable mold of the present application;

[0031] Figure 3is a schematic diagram of the auxiliary groove of the present application;

[0032] Figure 4 is a schematic diagram of the material conveying pipe of the present application;

[0033] Figure 5 is a schematic diagram of the ring cutting device of the present application;

[0034] Figure 6 is a schematic diagram of the ring-shaped disc of the present application;

[0035] Figure 7 is an enlarged view of A of the present application; Figure 6

[0036] Figure 8 is a schematic diagram of the circular cover of the present application;

[0037] Figure 9 is a partial sectional view of the liquid storage box of the present application;

[0038] Figure 10 is a schematic diagram of the pressing plate of the present application.

[0039] Explanation of reference signs:

[0040] 1, fixed mold; 2, ejector rod; 3, guide column; 4, movable mold; 5, material injection cavity; 6, material cutting device; 61, auxiliary groove; 62, material discharge hole; 63, motor; 64, hole rod; 65, hollow rod; 66, material conveying pipe; 67, ring cutting device; 68, ring-shaped disc; 69, through hole; 610, first electric telescopic rod; 611, support column; 612, first magnet; 613, sleeve; 614, cylinder; 615, spring rod; 616, knocking block; 617, second magnet; 618, rubber pad; 619, protruding block; 7, cooling device; 71, liquid storage box; 72, pipeline; 73, piston plate; 74, circular rod; 75, pressing plate; 76, second electric telescopic rod; 77, circular ring; 78, reinforcing ring; 79, sealing ring; 710, circular cover; 711, reinforcing rib; 712, semiconductor refrigeration sheet. DETAILED DESCRIPTION

[0041] Reference Figures 1-4 ​The embodiment shown discloses a low-pressure injection mold for automobile manufacturing, which comprises a fixed mold 1 and a movable mold 4, the movable mold 4 is arranged on one side of the fixed mold 1, the inside of the fixed mold 1 is provided with a material pushing rod 2, one side of the fixed mold 1 is provided with a guide column 3, the surface of the guide column 3 is in sliding connection with the inner wall of the movable mold 4, one side of the movable mold 4 is provided with an injection cavity 5, one side of the movable mold 4 is provided with a cutting device 6 for separating the melt remaining in the injection cavity 5 from the melt in the cavity and preventing the excess columnar melt after solidification from being bonded with the surface of the part by rotating the feeding pipe 66, first, the fixed mold 1 and the movable mold 4 are fixed on the injection molding machine, then the driving mechanism on the injection molding machine drives the movable mold 4 to move towards the fixed mold 1 until the movable mold 4 and the fixed mold 1 are tightly closed to form a closed cavity, then the plastic particles are put into the injection molding machine for hot melting, then the melted plastic melt is injected into the injection cavity 5 through the pushing mechanism and flows into the cavity, after the plastic melt is cooled and solidified, the mold is separated and the formed part is taken out, so as to complete the injection molding of the plastic part.

[0042] With reference to Figures 3-6As shown, the embodiment discloses that the cutting device 6 includes a motor 63, the movable mold 4 is provided with an auxiliary groove 61 on the side close to the injection cavity 5, the inner wall of the auxiliary groove 61 is connected with the inner wall of the injection cavity 5, the movable mold 4 is provided with a discharge hole 62 on one side, the motor 63 is fixedly connected with the inner wall of the auxiliary groove 61, the output end of the motor 63 is fixedly connected with a hole rod 64, the one side of the hole rod 64 is provided with a cooling device 7, the one side of the hole rod 64 is fixedly connected with a hollow rod 65, the one side of the hollow rod 65 is fixedly connected with a feeding pipe 66, the inner wall of the auxiliary groove 61 is fixedly connected with an annular disc 68, the feeding pipe 66 is arranged inside the annular disc 68, the surface of the feeding pipe 66 is attached to the inner wall of the annular disc 68, the one side of the annular disc 68 is provided with a first electric telescopic rod 610 corresponding to the position of the discharge hole 62, the inner wall of the annular disc 68 is provided with a through hole 69 coinciding with the inner wall of the injection cavity 5, by arranging the cutting device 6, when the plastic melt is injected into the cavity through the injection cavity 5, the feeding pipe 66 and the through hole 69, part of the melt is left in the feeding pipe 66, at this time, the motor 63 is started, the motor 63 drives the hole rod 64 and the hollow rod 65 to rotate, the hollow rod 65 drives the feeding pipe 66 to rotate along the inside of the annular disc 68, when the feeding pipe 66 rotates to the position where the inner wall is separated from the inner wall of the through hole 69, the feeding pipe 66 carries the residual melt away, so that it is separated from the melt in the cavity, and under the sealing effect of the annular disc 68 on the opening position of the feeding pipe 66, the melt is left in the feeding pipe 66, when the melt is cooled and solidified in the feeding pipe 66, the feeding pipe 66 is continuously rotated by the motor 63, the feeding pipe 66 is rotated to the position corresponding to the first electric telescopic rod 610, the first electric telescopic rod 610 is started to move in extension and retraction and pushes out the plastic melt solidified in the feeding pipe 66, which is immediately pushed out of the movable mold 4 through the discharge hole 62, thereby achieving the cutting and cleaning of the residual melt in the injection cavity 5, reducing the situation that the residual plastic melt in the injection cavity 5 is connected with the molded part in the cavity after being cooled and solidified, causing the formation of excess cylindrical protrusions on the surface of the part and the need for secondary cutting by personnel, and improving the molding quality and processing efficiency of the plastic product.

[0043] Referring to Figure 5 and Figure 6 As shown, the embodiment discloses that the one side of the feeding pipe 66 is fixedly connected with a cutting ring 67, the cutting ring 67 is arranged inside the annular disc 68, the surface of the cutting ring 67 is tightly attached to the inner wall of the annular disc 68, the surface of the cutting ring 67 is larger than the inner wall of the through hole 69, by arranging the cutting ring 67, the cutting ring 67 can cut off the melt in cooperation with the movement of the feeding pipe 66, and when the feeding pipe 66 rotates to the position away from the through hole 69, the cutting ring 67 can seal the through hole 69, reducing the situation that the melt in the cavity composed of the movable mold 4 and the fixed mold 1 flows out through the inside of the through hole 69.

[0044] Referring to Figure 5 and Figure 6And Figure 7 As shown in FIG. 63, the hole rod 64 is fixedly connected with a sleeve 613 at one end away from the motor 63, one side of the annular disc 68 is fixedly connected with a support column 611, the sleeve 613 is sleeved on the surface of the support column 611, a plurality of first magnets 612 are fixedly connected on the surface of the support column 611, a cylinder 614 is fixedly connected on the surface of the sleeve 613, a spring rod 615 is slidably connected on the inner wall of the cylinder 614, the other end of the spring rod 615 is fixedly connected with the inner wall of the cylinder 614, a knocking block 616 is fixedly connected on one end of the spring rod 615, a second magnet 617 is fixedly connected on the end of the spring rod 615 away from the knocking block 616, the first magnet 612 and the second magnet 617 are magnetically attracted, the knocking block 616 corresponds to the position of the feeding pipe 66, by arranging the knocking block 616, when the feeding pipe 66 rotates, the sleeve 613 is driven by the hole rod 64 to rotate synchronously, the cylinder 614 is driven by the sleeve 613 to rotate, the spring rod 615, the knocking block 616 and the second magnet 617 are driven by the cylinder 614 to rotate, when the second magnet 617 rotates to the position corresponding to the first magnet 612, the first magnet 612 attracts the second magnet 617, the second magnet 617 moves to the direction close to the first magnet 612, and then the knocking block 616 and the spring rod 615 are driven by the second magnet 617 and move to the direction close to the support column 611, when the second magnet 617 rotates to the position away from the first magnet 612, under the reaction force of the spring in the spring rod 615, the spring rod 615 pushes the knocking block 616 to move to the direction close to the feeding pipe 66 and knocks the surface of the feeding pipe 66, so that the knocking block 616 repeatedly knocks the surface of the feeding pipe 66 in the process of rotation of the feeding pipe 66, the feeding pipe 66 vibrates under the impact of the knocking block 616, the plastic melt in the feeding pipe 66 is separated from the inner wall of the feeding pipe 66 under the vibration, and the demolding efficiency of the plastic melt in the feeding pipe 66 is further improved, the rubber pad 618 is fixedly connected on one side of the cylinder 614, the rubber pad 618 is sleeved on the surface of the spring rod 615, the protrusion 619 is fixedly connected on one side of the feeding pipe 66, the protrusion 619 corresponds to the position of the knocking block 616, by arranging the rubber pad 618, the rubber pad 618 can separate the knocking block 616 from the cylinder 614, reduce the direct collision between the knocking block 616 and the cylinder 614 in the process of reciprocating movement, and cause the cylinder 614 to have large wear on the surface, meanwhile, the protrusion 619 can replace the surface of the feeding pipe 66 to contact with the knocking block 616, reduce the damage to the surface of the feeding pipe 66 caused by the knocking block 616, and improve the service life and the anti-knocking performance of the feeding pipe 66.

[0045] With reference to Figure 8 And Figure 9 And Figure 10As shown, the embodiment discloses a cooling device 7 comprising a liquid storage box 71 containing cooling liquid, the liquid storage box 71 is sleeved on the surface of the supporting rod, the liquid storage box 71 is fixedly connected with the sleeve 613, one side of the liquid storage box 71 is fixedly connected with a pipeline 72, the other end of the pipeline 72 is fixedly connected with the hollow rod 65, the inner wall of the liquid storage box 71 is slidably connected with a piston plate 73, one side of the piston plate 73 is fixedly connected with a round rod 74, the surface of the round rod 74 is slidably connected with the inner wall of the liquid storage box 71, the end of the round rod 74 away from the piston plate 73 is fixedly connected with a pressing plate 75, the pressing plate 75 is sleeved on the surface of the hole rod 64, the inner wall of the hole rod 64 is fixedly connected with a second electric telescopic rod 76, the output end of the second electric telescopic rod 76 is fixedly connected with the pressing plate 75, the surface of the material conveying pipe 66 is fixedly connected with a circular cover 710, the inner wall of the circular cover 710 is connected with the inner wall of the hollow rod 65, by arranging the cooling device 7, when the material conveying pipe 66 takes the plastic melt in its inside away from the position of the through hole 69, the second electric telescopic rod 76 is started, so that the second electric telescopic rod 76 drives the pressing plate 75 to move towards the direction close to the liquid storage box 71, so that the pressing plate 75 cooperates with the round rod 74 to push the piston plate 73 in the liquid storage box 71 to move, so that the piston plate 73 pushes the cooling liquid in the liquid storage box 71 into the pipeline 72 by extruding, so that the cooling liquid is pushed into the hollow rod 65 through the pipeline 72, and then enters the inside of the circular cover 710 from the hollow rod 65, so that the cooling liquid fully contacts with the surface of the material conveying pipe 66 in the circular cover 710, reduces the temperature of the material conveying pipe 66, so as to achieve the auxiliary cooling of the plastic melt in the material conveying pipe 66, reduces the case that the plastic melt has a high temperature and needs a long time to cool in the material conveying pipe 66, improves the cooling efficiency and material removing effect of the excess plastic melt in the material conveying pipe 66.

[0046] With reference to Figure 8 and Figure 9 and Figure 10As shown, the embodiment discloses that the surface of the circular cover 710 is provided with a plurality of reinforcing ribs 711, the plurality of reinforcing ribs 711 are arranged at equal distances, the reinforcing rib 711 is made of aluminum material, by arranging the reinforcing rib 711, the reinforcing rib 711 can increase the strength of the circular cover 710, reduce the deformation or fracture of the circular cover 710 in the use process, meanwhile, the characteristics of the aluminum material can be utilized to accelerate the heat conduction and improve the heat volatilization, further improve the cooling efficiency, the surface of the pipeline 72 is fixedly sleeved with a circular ring 77, one side of the circular ring 77 is fixedly connected with a reinforcing ring 78, by arranging the circular ring 77 and the reinforcing ring 78, the circular ring 77 cooperates with the reinforcing ring 78 to connect the plurality of pipelines 72 together and assist in supporting and limiting the plurality of pipelines 72, reduce the large amplitude shaking and shaking of the pipeline 72 in the use process, cause the separation of the connection between the pipeline 72 and the hollow rod 65, improve the use stability of the pipeline 72, one side of the liquid storage box 71 close to the circular rod 74 is fixedly connected with a sealing ring 79, the sealing ring 79 is sleeved on the surface of the circular rod 74, the inner wall of the sealing ring 79 is attached to the surface of the circular rod 74, by arranging the sealing ring 79, the sealing ring 79 can fill and seal the gap between the circular rod 74 and the liquid storage box 71, reduce the outflow of the air or the cooling liquid in the liquid storage box 71 through the gap between the circular rod 74 and the liquid storage box 71.

[0047] Referring to Figure 8 As shown, the embodiment discloses that the surface of the hollow rod 65 is provided with a semiconductor refrigerating sheet 712, the refrigerating end of the semiconductor refrigerating sheet 712 is fixedly connected with the hollow rod 65, the hot end of the semiconductor refrigerating sheet 712 is connected with a heat dissipation fin, by arranging the semiconductor refrigerating sheet 712, the semiconductor refrigerating sheet 712 is laminated by a large number of P-type semiconductor and N-type semiconductor grains through an adhesive, forms a structure similar to a chip, when the direct current passes through the thermocouple composed of the P-type semiconductor and the N-type semiconductor material, due to the energy level difference of the charge carriers in the material, causes the refrigeration and heat release phenomena to occur at the two ends of the thermocouple respectively, makes the temperature of the hollow rod 65 in contact with the cold end of the semiconductor refrigerating sheet 712 gradually reduce, and assists in cooling the cooling liquid flowing in the hollow rod 65, thereby realizing the secondary cooling of the cooling liquid, to improve the cooling effect of the cooling liquid on the plastic melt.

[0048] The working principle is: first, fix the fixed mold 1 and the movable mold 4 on the injection molding machine, then drive the movable mold 4 to move towards the fixed mold 1 by the driving mechanism on the injection molding machine, until the movable mold 4 and the fixed mold 1 are tightly closed to form a closed cavity, then put the plastic particles into the injection molding machine for hot melting, then inject the melted plastic melt into the injection cavity 5 through the pushing mechanism, and then flow into the cavity, after the plastic melt is cooled and solidified, separate the mold and take out the molded part, thereby completing the injection molding of the plastic part.

[0049] When the plastic melt is injected into the cavity through the injection cavity 5, the feeding pipe 66 and the through hole 69, part of the melt remains in the feeding pipe 66. At this time, the motor 63 is started to drive the hole rod 64 and the hollow rod 65 to rotate, so that the hollow rod 65 drives the feeding pipe 66 to rotate along the inside of the annular disc 68. When the feeding pipe 66 rotates to the position where the inner wall is separated from the inner wall of the through hole 69, the rotation of the feeding pipe 66 is paused, the cutting ring 67 closes the through hole 69, the feeding pipe 66 carries the residual melt away from the melt in the cavity, and the melt remains in the feeding pipe 66 under the closing action of the annular disc 68 at the opening position of the feeding pipe 66. At this time, the second electric telescopic rod 76 is started to drive the pressing plate 75 to move towards the storage box 71, so that the pressing plate 75 cooperates with the round rod 74 to push the piston plate 73 inside the storage box 71 to move, so that the piston plate 73 pushes the cooling liquid in the storage box 71 into the pipe 72 by extruding the cooling liquid, so that the cooling liquid is pushed into the hollow rod 65 through the pipe 72, and then enters the inside of the circular cover 710 through the hollow rod 65, so that the cooling liquid fully contacts the surface of the feeding pipe 66 in the circular cover 710, thereby reducing the temperature of the feeding pipe 66, and achieving auxiliary cooling of the plastic melt in the feeding pipe 66. When the melt is cooled and solidified in the feeding pipe 66, continue to drive the hole rod 64 and the feeding pipe 66 to rotate by the motor 63, so that the hole rod 64 drives the sleeve 613 to rotate synchronously, so that the sleeve 613 drives the cylinder 614 to rotate, so that the cylinder 614 drives the spring rod 615, the knocking block 616 and the second magnet 617 to rotate. When the second magnet 617 rotates to the corresponding position of the first magnet 612, the first magnet 612 attracts the second magnet 617, so that the second magnet 617 moves towards the first magnet 612, and then the knocking block 616 and the spring rod 615 are driven by the second magnet 617 and move towards the support column 611. When the second magnet 617 rotates to the position away from the first magnet 612, under the reaction force of the spring in the spring rod 615, the spring rod 615 pushes the knocking block 616 to move towards the feeding pipe 66 and knocks the surface of the feeding pipe 66, so that the feeding pipe 66 is repeatedly knocked by the knocking block 616 during rotation, so that the feeding pipe 66 vibrates under the impact of the knocking block 616, so that the plastic melt in the feeding pipe 66 gradually separates from the inner wall of the feeding pipe 66 under the vibration. When the feeding pipe 66 rotates to the position corresponding to the first electric telescopic rod 610, the first electric telescopic rod 610 is started to push the solidified plastic melt in the feeding pipe 66 out through telescopic movement, and then push it out of the movable die 4 through the discharge hole 62, thereby achieving cutting, cooling and cleaning of the residual melt in the injection cavity 5.

Claims

1. A low pressure injection mold for automotive manufacturing comprising a fixed mold (1) and a movable mold (4), characterized in that: The movable mold (4) is arranged on one side of the fixed mold (1), the inside of the fixed mold (1) is provided with a material ejecting rod (2), one side of the fixed mold (1) is provided with a guide column (3), the surface of the guide column (3) is in sliding connection with the inner wall of the movable mold (4), one side of the movable mold (4) is provided with a material injecting cavity (5), one side of the movable mold (4) is provided with a cutting device (6) for separating the melt remaining in the material injecting cavity (5) from the melt in the cavity by rotating the material conveying pipe (66), preventing the excess columnar melt after solidification from being bonded with the surface of the part, the cutting device (6) comprises a motor (63), the side of the movable mold (4) close to the material injecting cavity (5) is provided with an auxiliary groove (61), the inner wall of the auxiliary groove (61) is connected with the inner wall of the material injecting cavity (5), one side of the movable mold (4) is provided with a material discharging hole (62), the inner wall of the auxiliary groove (61) is fixedly connected with the motor (63), the output end of the motor (63) is fixedly connected with a hole rod (64), one side of the hole rod (64) is provided with a cooling device (7), one side of the hole rod (64) is fixedly connected with a hollow rod (65), one side of the hollow rod (65) is fixedly connected with the material conveying pipe (66), the inner wall of the auxiliary groove (61) is fixedly connected with an annular disc (68), the material conveying pipe (66) is arranged in the annular disc (68), the surface of the material conveying pipe (66) is attached to the inner wall of the annular disc (68), one side of the annular disc (68) is provided with a first electric telescopic rod (610) corresponding to the position of the material discharging hole (62), the inner wall of the annular disc (68) is provided with a through hole (69) coinciding with the inner wall of the material injecting cavity (5), one side of the cylinder (614) is fixedly connected with a rubber pad (618), the rubber pad (618) is sleeved on the surface of the spring rod (615), one side of the material conveying pipe (66) is fixedly connected with a protruding block (619), the protruding block (619) corresponds to the position of the knocking block (616).

2. The low pressure injection mold for manufacturing an automobile according to claim 1, characterized in that: One side of the material conveying pipe (66) is fixedly connected with a cutting ring (67), the cutting ring (67) is arranged in the annular disc (68), the surface of the cutting ring (67) is tightly attached to the inner wall of the annular disc (68), the surface of the cutting ring (67) is larger than the inner wall of the through hole (69).

3. The low pressure injection mold for manufacturing an automobile according to claim 1, wherein: The hole rod (64) is fixedly connected with a sleeve (613) at one end away from the motor (63), one side of the annular disc (68) is fixedly connected with a support column (611), the sleeve (613) is sleeved on the surface of the support column (611), a plurality of first magnets (612) are fixedly connected on the surface of the support column (611), a cylinder (614) is fixedly connected on the surface of the sleeve (613), a spring rod (615) is slidably connected on the inner wall of the cylinder (614), the other end of the spring rod (615) is fixedly connected with the inner wall of the cylinder (614), one end of the spring rod (615) is fixedly connected with a knocking block (616), the other end of the spring rod (615) away from the knocking block (616) is fixedly connected with a second magnet (617), the first magnet (612) and the second magnet (617) are magnetically attracted, and the knocking block (616) corresponds to the position of the feeding pipe (66).

4. The low pressure injection mold for manufacturing an automobile according to claim 1, characterized in that: The cooling device (7) comprises a liquid storage box (71) containing cooling liquid, the liquid storage box (71) is sleeved on the surface of the support rod, the liquid storage box (71) is fixedly connected with the sleeve (613), one side of the liquid storage box (71) is fixedly connected with a pipeline (72), the other end of the pipeline (72) is fixedly connected with the hollow rod (65), the inner wall of the liquid storage box (71) is slidably connected with a piston plate (73), one side of the piston plate (73) is fixedly connected with a round rod (74), the surface of the round rod (74) is slidably connected with the inner wall of the liquid storage box (71), one end of the round rod (74) away from the piston plate (73) is fixedly connected with a pressing plate (75), the pressing plate (75) is sleeved on the surface of the hole rod (64), the inner wall of the hole rod (64) is fixedly connected with a second electric telescopic rod (76), the output end of the second electric telescopic rod (76) is fixedly connected with the pressing plate (75), and the surface of the feeding pipe (66) is fixedly connected with a circular cover (710). The inner wall of the circular cover (710) is connected with the inner wall of the hollow rod (65).

5. The low pressure injection mold for manufacturing an automobile according to claim 4, wherein: A plurality of reinforcing ribs (711) are arranged on the surface of the circular cover (710), the reinforcing ribs (711) are arranged at equal distances, and the reinforcing ribs (711) are made of aluminum.

6. The low pressure injection mold for manufacturing an automobile according to claim 4, wherein: A circular ring (77) is fixedly sleeved on the surface of the pipeline (72), and the circular ring (77) is fixedly connected with a reinforcing ring (78) on one side.

7. The low pressure injection mold for manufacturing an automobile according to claim 4, wherein: A sealing ring (79) is fixedly connected on one side of the liquid storage box (71) close to the round rod (74), the sealing ring (79) is sleeved on the surface of the round rod (74), and the inner wall of the sealing ring (79) is attached to the surface of the round rod (74).

8. The low pressure injection mold for manufacturing an automobile according to claim 1, characterized in that: A semiconductor refrigerating sheet (712) is arranged on the surface of the hollow rod (65), a heat dissipation fin is connected to the hot end of the semiconductor refrigerating sheet (712), and the cold end of the semiconductor refrigerating sheet (712) is fixedly connected with the hollow rod (65).

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