Injection mold capable of improving fluidity of plastic

Abstract

The injection mold comprises a base, a lower mold body and an upper mold body, two symmetrically-distributed mold feet are arranged on the bottom face of the lower mold body, an ejector pin bottom plate is arranged between the two mold feet, a vibration assembly is arranged on the ejector pin bottom plate, a mounting groove and a connecting groove are formed in the upper mold body, and the connecting groove communicates with the mounting groove; and a heating assembly is arranged in the connecting groove. According to the technical scheme, the first connecting pipe, the second connecting pipe and the third connecting pipe are uniformly heated through the heating assembly, and in the process that a sizing material enters the mold cavity through the injection molding opening, the sizing material flowing in the first connecting pipe, the second connecting pipe and the third connecting pipe can be heated so that the mobility of the sizing material can be kept; the lower mold is knocked by the vibration assembly in a circulating and reciprocating manner, and a vibration effect is generated on the lower mold, so that a sizing material in the mold cavity is distributed more uniformly, sink marks and bubbles are prevented from being generated in the molding process of a plastic injection molding part, and the production quality of the mold is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection mold capable of improving plastic fluidity. Background Art

[0002] The injection mold changes according to the structure of the product to be made, but the basic structure remains unchanged. Usually the injection mold consists of two parts: the movable mold and the fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine.

[0003] Since most plastic injection molded parts are irregular in shape and there are thick bumps on the plastic injection molded parts, uneven thickness is prone to occur during injection molding. In addition, due to the uneven flow of the injection liquid inside the mold cavity, it is easy to cause problems such as shrinkage marks and bubbles in the plastic injection molded parts during the molding process, which greatly affects the production quality of plastic products. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an injection mold with improved plastic fluidity to solve the problems raised in the above background technology.

[0005] The present invention is achieved through the following technical solutions: An injection mold capable of improving the fluidity of plastics, comprising a base, a lower mold and an upper mold, wherein the lower mold is mounted on the top surface of the base, the upper mold is mounted on the top surface of the lower mold, the top surface of the lower mold is provided with a plurality of mold cavities, the bottom surface of the upper mold is provided with a plurality of mold cores adapted to the mold cavities, the top surface of the upper mold is provided with an injection port, the bottom surface of the lower mold is provided with two symmetrically distributed mold feet, an ejector bottom plate is provided between the two mold feet, a vibration component is provided on the ejector bottom plate, and the vibration component is used to knock the lower mold so that the plastic is evenly distributed in the mold cavity; An installation groove is provided inside the upper mold, and a first connecting tube is connected to the injection port. One end of the first connecting tube is connected to the bottom end of the injection port, and the other end extends downward and is located in the installation groove, and is connected to a first three-way joint. The joints at the opposite ends of the first three-way joint are respectively connected to the second connecting tube, and one end of the second connecting tube away from the first three-way joint is respectively connected to the second three-way joint, and the joints at the opposite ends of the second three-way joint are both connected to third connecting tubes. Multiple third connecting tubes respectively pass through multiple mold cores and correspond to multiple mold cavities. A connecting groove is also provided in the upper mold, and the connecting groove is connected to the installation groove. A heating component for heating the second connecting tube and the third connecting tube is arranged in the connecting groove.

[0006] Furthermore, the vibration assembly includes a motor, a gear, a rack, two fixed plates and two knocking blocks. The motor is installed on the top surface of the ejector base plate. A rotating rod is connected to the motor output shaft. The end of the rotating rod away from the motor longitudinally penetrates the ejector base plate and is connected to the gear. The rack is slidably fitted on the bottom surface of the ejector base plate and is meshed with the gear. One end of the two fixed plates is fixedly connected to the opposite ends of the rack, and the other end extends upward. The two knocking blocks are respectively connected to the upper ends of the two fixed plates.

[0007] Furthermore, a slide groove is arranged on the bottom surface of the ejector base plate, and a sliding block slidably matched with the slide groove is arranged on one side of the rack.

[0008] Furthermore, fixing blocks are provided on opposite sides of the lower mold, and the fixing blocks are detachably mounted on the lower mold by bolts.

[0009] Furthermore, the heating component includes an electromagnetic wire, which is installed inside the connecting groove, and a plurality of temperature sensors are also arranged inside the connecting groove.

[0010] Furthermore, a plurality of groups of ejector bodies are arranged on the top surface of the ejector base plate, a plurality of groups of connecting holes are provided in the plurality of mold cavities, the plurality of groups of ejector bodies respectively correspond to the connecting holes in the plurality of mold cavities, a plurality of elastic supporting structures are arranged on the top surface of the base, and two ends of the plurality of elastic supporting structures are respectively connected to the bottom surface of the ejector base plate and the top surface of the base.

[0011] Furthermore, the elastic support structure includes a support spring, the upper and lower ends of the support spring are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base, a guide rod is arranged inside the support spring, the guide rod is a telescopic structure, and the upper and lower ends of the guide rod are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base.

[0012] Furthermore, the guide rod includes an outer rod and an inner rod. The outer rod is provided with a movable groove for inserting the inner rod. The outer rod has limit grooves connected to the movable groove on opposite sides. The inner rod slides in the movable groove. Limit blocks matching the limit grooves are provided on opposite sides of the lower end of the inner rod.

[0013] Furthermore, a cooling component is provided in the lower mold, and the cooling component is used to accelerate the cooling of the plastic in the mold cavity.

[0014] Furthermore, the cooling component includes a cooling channel, a liquid inlet pipe and a liquid outlet pipe. The cooling channel is opened inside the lower mold and surrounds multiple mold cavities. One end of the liquid inlet pipe and the liquid outlet pipe is connected to the cooling channel, and the other end is connected to the external cooling box.

[0015] The beneficial effects of the present invention are: The injection mold has the function of improving the fluidity of plastic. The first connecting tube, the second connecting tube and the third connecting tube are evenly heated by a heating component. When the rubber enters the mold cavity through the injection port, the rubber flowing in the first connecting tube, the second connecting tube and the third connecting tube can be heated to keep the fluidity. After the rubber flows into the mold cavity, the vibration component cyclically strikes the lower mold to produce a vibration effect on the lower mold, so that the rubber in the mold cavity is more evenly distributed, and the generation of shrinkage marks and bubbles in the plastic injection molded parts during the molding process is prevented, thereby improving the production quality of the mold.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the present invention (first viewing angle); Figure 2 is a stereogram of the present invention (second viewing angle); Figure 3 An exploded view of the present invention; Figure 4 It is a schematic diagram of the upper mold structure of the present invention; Figure 5 is a cross-sectional view of the top surface of the upper mold of the present invention; Figure 6 It is a side sectional view of the upper mold of the present invention; Figure 7 is a cross-sectional view of the lower mold of the present invention; Figure 8 This is a schematic diagram of the structure of the ejector mainboard of the present invention (first viewing angle); Fig. 9 This is a schematic diagram of the structure of the ejector mainboard of the present invention (second viewing angle); Fig.10 It is a schematic diagram of the guide rod structure of the present invention.

[0018] In the figure: 1, base; 2, lower mold; 3, mold cavity; 4, upper mold; 5, mold core; 6, injection port; 7, first connecting pipe; 8, first three-way joint; 9, second connecting pipe; 10, second three-way joint; 11, third connecting pipe; 12, mounting groove; 13, connecting groove; 14, heating component; 141, electromagnetic wire; 142, temperature sensor; 15, ejector base plate; 16, ejector body; 17, vibration component; 171, motor; 1 72. gear; 173. rack; 174. fixed plate; 175. knock block; 176. slide groove; 177. slider; 178. fixed block; 18. elastic supporting structure; 181. supporting spring; 182. guide rod; 1821. outer rod; 1822. inner rod; 1823. movable groove; 1824. limit groove; 1825. limit block; 19. cooling assembly; 191. cooling channel; 192. liquid inlet pipe; 193. liquid outlet pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0024] See also Figure 1-10 The present invention provides a technical solution: an injection mold with improved plastic fluidity, comprising a base 1, a lower mold 2 and an upper mold 4, the lower mold 2 is mounted on the top surface of the base 1, the upper mold 4 is mounted on the top surface of the lower mold 2, a plurality of mold cavities 3 are formed on the top surface of the lower mold 2, a plurality of mold cores 5 adapted to the mold cavities 3 are formed on the bottom surface of the upper mold 4, an injection port 6 is formed on the top surface of the upper mold 4, two symmetrically distributed mold feet are formed on the bottom surface of the lower mold 2, an ejector bottom plate 15 is formed between the two mold feet, a vibration component 17 is formed on the ejector bottom plate 15, and the vibration component 17 is used to knock the lower mold 2 so that the plastic is evenly distributed in the mold cavity 3; A mounting groove 12 is provided inside the upper mold 4, and a first connecting tube 7 is connected to the injection port 6. One end of the first connecting tube 7 is connected to the bottom end of the injection port 6, and the other end extends downward and is located in the mounting groove 12, and is connected to a first three-way joint 8. The joints at the opposite ends of the first three-way joint 8 are respectively connected to second connecting tubes 9, and one end of the second connecting tube 9 away from the first three-way joint 8 is respectively connected to a second three-way joint 10, and the joints at the opposite ends of the second three-way joint 10 are both connected to third connecting tubes 11. Multiple third connecting tubes 11 respectively penetrate multiple mold cores 5 and correspond to multiple mold cavities 3. A connecting groove 13 is also provided in the upper mold 4. The connecting groove 13 is connected to the mounting groove 12, and a heating component 14 for heating the second connecting tube 9 and the third connecting tube 11 is arranged in the connecting groove 13.

[0025] In this technical solution, positioning rods are provided at the four corners of the top surface of the lower mold 2, one end of the positioning rods is connected to the top surface of the lower mold 2, and the other end extends upward. The four corners of the upper mold 4 are provided with positioning holes that are compatible with the positioning rods, and the four positioning rods are slidably fitted in the positioning holes respectively.

[0026] During specific use, first, the positioning hole of the upper mold 4 is slid downward along the positioning rod on the lower mold 2 until the bottom surface of the upper mold 4 is in contact with the bottom surface of the lower mold 2, and the space formed between the mold core 5 and the mold cavity 3 is the mold molding cavity, and then the heating component 14 is started, and the first connecting tube 7, the second connecting tube 9 and the third connecting tube 11 are evenly heated by the heating component 14, and then the vibration component 17 is started, and the outlet of the injection molding machine is connected to the injection port 6 of the upper mold 4, so that the rubber in the injection molding machine flows into the first connecting tube 7 through the injection port 6, and then the alternating current is diverted through the first three-way joint 8 to flow into the two second connecting tubes 9 respectively, and is diverted again through the second three-way joint 10 to flow into the third connecting tube 11, and flows into the mold cavity 3 through the third discharge pipe, and at the same time, the vibration component 17 can knock on the lower mold 2 to make the rubber in the mold cavity 3 evenly distributed in the mold cavity 3.

[0027] Among them, the first connecting tube 7, the second connecting tube 9 and the third connecting tube 11 are evenly heated by the heating component 14. In the process of the rubber entering the mold cavity 3 through the injection port 6, the rubber flowing in the first connecting tube 7, the second connecting tube 9 and the third connecting tube 11 can be heated to keep its fluidity. After the rubber flows into the mold cavity 3, the vibration component 17 cyclically strikes the lower mold 2, generating a vibration effect on the lower mold 2, so that the rubber in the mold cavity 3 is more evenly distributed, preventing the generation of shrinkage marks and bubbles in the plastic injection molded parts during the molding process, thereby improving the production quality of the mold.

[0028] In this embodiment: the vibration assembly 17 includes a motor 171, a gear 172, a rack 173, two fixed plates 174 and two knocking blocks 175. The motor 171 is installed on the top surface of the ejector base plate 15. A rotating rod is connected to the output shaft of the motor 171. The end of the rotating rod away from the motor 171 longitudinally penetrates the ejector base plate 15 and is connected to the gear 172. The rack 173 is slidably fitted on the bottom surface of the ejector base plate 15 and is meshed with the gear 172. One end of the two fixed plates 174 is fixedly connected to the opposite ends of the rack 173, and the other end extends upward. The two knocking blocks 175 are respectively connected to the upper ends of the two fixed plates 174.

[0029] When in use, first start the motor 171, the motor 171 drives the rotating rod and the gear 172 to achieve reciprocating rotation, the reciprocating rotation of the gear 172 drives the rack 173 to move back and forth along the ejector base plate 15, the reciprocating movement of the rack 173 drives the fixed plates 174 and the knocking blocks 175 at both ends to move synchronously back and forth, thereby achieving cyclic knocking of the lower mold 2.

[0030] The motor 171 is a servo motor 171 or a stepper motor 171 . Both the servo motor 171 and the stepper motor 171 can realize precise control of the rotation angle and speed through precise control signals. Through a programming controller, the reciprocating rotation of the rotating rod can be easily realized.

[0031] In this embodiment, a slide groove 176 is provided on the bottom surface of the ejector base plate 15 , and a slider 177 slidably matched with the slide groove 176 is provided on one side of the rack 173 .

[0032] When the rack 173 moves back and forth, it drives the slider 177 to move along the slide groove 176 , and the slider 177 can provide support force for the rack 173 .

[0033] In this embodiment: fixing blocks 178 are provided on opposite sides of the lower mold 2, and the fixing blocks 178 are detachably mounted on the lower mold 2 by bolts.

[0034] The height of the fixed block 178 is consistent with that of the knocking block 175. The knocking block 175 hits the fixed block 178 to prevent the knocking block 175 from causing damage to the lower mold 2. When the fixed block 178 is deformed due to excessive knocking times by the knocking block 175, it can be removed by bolts for replacement.

[0035] In this embodiment, the heating assembly 14 includes an electromagnetic wire 141 , which is installed inside the connecting groove 13 , and a plurality of temperature sensors 142 are also arranged inside the connecting groove 13 .

[0036] The electromagnetic wire 141 is provided with electric energy by an external power supply, and the electromagnetic wire 141 converts the electric energy into heat energy, so as to heat the first connecting tube 7, the second connecting tube 9 and the third connecting tube 11, and the temperature in the movable groove 1823 and the connecting groove 13 can be monitored by the temperature sensor 142 to prevent safety hazards caused by excessively high temperature, or reduce the effect of improving the flow rate of the rubber material due to excessively low temperature.

[0037] In this embodiment: a plurality of groups of ejector bodies 16 are arranged on the top surface of the ejector base plate 15, a plurality of groups of connecting holes are provided in the plurality of mold cavities 3, the plurality of groups of ejector bodies 16 respectively correspond to the connecting holes in the plurality of mold cavities 3, a plurality of elastic supporting structures 18 are arranged on the top surface of the base 1, and the two ends of the plurality of elastic supporting structures 18 are respectively connected to the bottom surface of the ejector base plate 15 and the top surface of the base 1.

[0038] In this technical solution, when the elastic support structure 18 is in a contracted state, the top of the ejector body 16 is flush with the connecting hole, and when the elastic support structure 18 is in a freely extended state, the top of the ejector body 16 extends out of the connecting hole.

[0039] During the injection molding process of the product, the elastic support structure 18 is in a contracted state. After the mold is formed, the upper mold 4 rises along the positioning rod. At the same time, the elastic support structure 18 changes from a contracted state to a freely extended state, so that the ejector body 16 rises to push the mold cavity 3 of the formed mold to facilitate the staff to collect it.

[0040] In this embodiment: the elastic support structure 18 includes a support spring 181, the upper and lower ends of the support spring 181 are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base 1, and a guide rod 182 is arranged in the support spring 181. The guide rod 182 is a telescopic structure, and the upper and lower ends of the guide rod 182 are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base 1.

[0041] When the support spring 181 is extended or retracted, the guide rod 182 is also extended or retracted synchronously, and the guide rod 182 can prevent the support spring 181 from bending too much.

[0042] In this embodiment: the guide rod 182 includes an outer rod 1821 and an inner rod 1822, the outer rod 1821 is provided with a movable groove 1823 for inserting the inner rod 1822, the outer rod 1821 is provided with limiting grooves 1824 connected to the movable groove 1823 on opposite sides, the inner rod 1822 is slidably fitted in the movable groove 1823, and limiting blocks 1825 adapted to the limiting groove 1824 are provided on opposite sides of the lower end of the inner rod 1822.

[0043] The inner rod 1822 contracts or expands along with the support spring 181 , and the limit block 1825 can prevent the inner rod 1822 from sliding out of the outer rod 1821 .

[0044] In this embodiment, a cooling assembly 19 is provided in the lower mold 2 , and the cooling assembly 19 is used to accelerate the cooling of the plastic in the mold cavity 3 .

[0045] When the mold cavity 3 is filled with the rubber material, the mold cavity 3 needs to be cooled to speed up the molding of the plastic product. The cooling liquid is transported to the inside of the lower mold 2 through a delivery pipe connected to the outside, thereby completing the cooling of the mold cavity 3.

[0046] In this embodiment: the cooling component 19 includes a cooling channel 191, a liquid inlet pipe 192 and a liquid outlet pipe 193. The cooling channel 191 is opened inside the lower mold 2 and surrounds multiple mold cavities 3. One end of the liquid inlet pipe 192 and the liquid outlet pipe 193 are connected to the cooling channel 191, and the other end is connected to the external cooling box.

[0047] In this technical solution, a liquid storage tank is arranged outside, and a water pump is arranged on the liquid storage tank. The inlet of the water pump is connected to a water pumping pipe, and the water pumping pipe extends into the liquid storage tank. The outlet of the water pump is connected to the liquid inlet pipe 192, and the liquid outlet pipe 193 is connected to the liquid inlet of the liquid storage tank (not shown in the drawings of this application).

[0048] The coolant in the liquid storage tank is pumped out by a water pump and transported to the cooling channel 191 through the liquid inlet pipe 192. After the cooling channel 191 is filled, it absorbs heat around the multiple mold cavities 3 and then is injected into the liquid storage tank through the liquid outlet pipe 193 to realize the circulation of the coolant, thereby performing heat exchange and achieving the purpose of heat dissipation.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An injection mold capable of improving the fluidity of plastic, comprising a base (1), a lower mold (2) and an upper mold (4), wherein the lower mold (2) is mounted on the top surface of the base (1), the upper mold (4) is mounted on the top surface of the lower mold (2), the top surface of the lower mold (2) is provided with a plurality of mold cavities (3), the bottom surface of the upper mold (4) is provided with a plurality of mold cores (5) adapted to the mold cavities (3), and the top surface of the upper mold (4) is provided with an injection port (6), characterized in that: The bottom surface of the lower mold (2) is provided with two symmetrically distributed mold feet, an ejector base plate (15) is provided between the two mold feet, and a vibration component (17) is provided on the ejector base plate (15), and the vibration component (17) is used to knock the lower mold (2) so that the plastic is evenly distributed in the mold cavity (3); The upper mold (4) is provided with a mounting groove (12) inside. The injection port (6) is connected with a first connecting pipe (7). One end of the first connecting pipe (7) is connected to the bottom end of the injection port (6), and the other end extends downward and is located in the mounting groove (12) and is connected with a first three-way joint (8). The joints at opposite ends of the first three-way joint (8) are respectively connected with second connecting pipes (9). One end of the second connecting pipe (9) away from the first three-way joint (8) is respectively connected with a second three-way joint (10). The joints at opposite ends of the second three-way joint (10) are both connected with third connecting pipes (11). The plurality of third connecting pipes (11) respectively penetrate the plurality of mold cores (5) and correspond to the plurality of mold cavities (3). The upper mold (4) is also provided with a connecting groove (13). The connecting groove (13) is connected with the mounting groove (12). A heating component (14) for heating the second connecting pipe (9) and the third connecting pipe (11) is arranged in the connecting groove (13).

2. The injection mold for improving plastic fluidity according to claim 1, characterized in that: The vibration assembly (17) comprises a motor (171), a gear (172), a rack (173), two fixed plates (174) and two knocking blocks (175). The motor (171) is mounted on the top surface of the ejector base plate (15). A rotating rod is connected to the output shaft of the motor (171). The end of the rotating rod away from the motor (171) longitudinally penetrates the ejector base plate (15) and is connected to the gear (172). The rack (173) is slidably matched with the bottom surface of the ejector base plate (15) and is meshed with the gear (172). One end of the two fixed plates (174) is respectively fixedly connected to the opposite ends of the rack (173), and the other end extends upward. The two knocking blocks (175) are respectively connected to the upper ends of the two fixed plates (174).

3. The injection mold for improving plastic fluidity according to claim 2, characterized in that: A sliding groove (176) is provided on the bottom surface of the ejector base plate (15), and a sliding block (177) that slidably cooperates with the sliding groove (176) is provided on one side of the rack (173).

4. The injection mold for improving plastic fluidity according to claim 1, characterized in that: The lower mold (2) is provided with fixing blocks (178) on opposite sides, and the fixing blocks (178) are detachably mounted on the lower mold (2) by means of bolts.

5. The injection mold for improving plastic fluidity according to claim 1, characterized in that: The heating component (14) comprises an electromagnetic wire (141), the electromagnetic wire (141) is installed inside the connection groove (13), and a plurality of temperature sensors (142) are also arranged inside the connection groove (13).

6. The injection mold for improving plastic fluidity according to claim 1, characterized in that: The top surface of the ejector base plate (15) is provided with a plurality of groups of ejector bodies (16), and a plurality of groups of connection holes are provided in each of the plurality of mold cavities (3). The plurality of groups of ejector bodies (16) respectively correspond to the connection holes in the plurality of mold cavities (3). The top surface of the base (1) is provided with a plurality of elastic support structures (18), and the two ends of the plurality of elastic support structures (18) are respectively connected to the bottom surface of the ejector base plate (15) and the top surface of the base (1).

7. The injection mold for improving plastic fluidity according to claim 6, characterized in that: The elastic support structure (18) comprises a support spring (181), the upper and lower ends of the support spring (181) are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base (1), a guide rod (182) is arranged inside the support spring (181), the guide rod (182) is a telescopic structure, and the upper and lower ends of the guide rod (182) are respectively connected to the bottom surface of the ejector mainboard and the top surface of the base (1).

8. The injection mold for improving plastic fluidity according to claim 7, characterized in that: The guide rod (182) comprises an outer rod (1821) and an inner rod (1822); the outer rod (1821) is provided with a movable groove (1823) for inserting the inner rod (1822); two opposite sides of the outer rod (1821) are provided with limiting grooves (1824) connected with the movable groove (1823); the inner rod (1822) is slidably fitted in the movable groove (1823); and limiting blocks (1825) adapted to the limiting grooves (1824) are provided at two opposite sides of the lower end of the inner rod (1822).

9. The injection mold for improving plastic fluidity according to claim 1, characterized in that: A cooling component (19) is provided in the lower mold (2), and the cooling component (19) is used to accelerate the cooling of the plastic in the mold cavity (3).

10. The injection mold with improved plastic fluidity according to claim 9, characterized in that: The cooling assembly (19) comprises a cooling channel (191), a liquid inlet pipe (192) and a liquid outlet pipe (193); the cooling channel (191) is opened inside the lower mold (2) and surrounds a plurality of mold cavities (3); one end of the liquid inlet pipe (192) and the liquid outlet pipe (193) are both connected to the cooling channel (191), and the other end is both connected to an external cooling box.

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