CN112157876A

CN112157876A - Injection mold

Info

Publication number: CN112157876A
Application number: CN202010994558.1A
Authority: CN
Inventors: 陶才剑; 王玉婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-01-01

Abstract

The invention belongs to the technical field of molds, and particularly relates to an injection mold which comprises a mold base, wherein a mold core is arranged on the mold base; the die holder is provided with a spiral groove; a fixing column is arranged on the side surface of the mold core; a first cavity is formed in the die holder; a vertical column and a spring III are arranged in the cavity I; after the mold core is completely installed in the circular groove, the vertical column penetrates through the fixing column; a cavity II is formed in the die holder; a magnetic block and a spring IV are arranged in the cavity II; a third cavity is formed in the die holder; a transverse column and a spring five are arranged in the cavity III; magnetic field force repelling each other exists between the transverse columns and the magnetic blocks; after the mold core is fixed in the mold base, a sealing block is arranged at the opening of the spiral groove; the invention has simple structure, can be quickly assembled and disassembled, can conveniently clean the water cooling pipeline in the die and improves the temperature control effect on the die.

Description

Injection mold

Technical Field

The invention belongs to the technical field of molds, and particularly relates to an injection mold.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Plastic injection molding is a method for producing plastic products in batches, and is a processing method used for producing parts with complex shapes. For an injection mold for thermoplastic plastics, a cooling system is required to cool the mold and solidify the molten plastic. The common method for cooling the mold is to arrange a cooling water channel in the mold and take away the heat of the mold by using the cooling water which circularly flows. Current injection mold dismantles to change comparatively difficultly, is difficult to the kind of quick change production product, simultaneously, in the use, easily deposit incrustation scale, corrosion in the cooling water passageway in the mould, make cooling channel cross-section diminish, cooling channel narrows, the rate of heat exchange between greatly reduced coolant liquid and the mould increases manufacturing cost simultaneously, reduces production efficiency to the mould is integrated into one piece, and the cooling water passageway clearance is very troublesome, the later maintenance of being not convenient for.

Some technical solutions exist in the prior art, such as chinese patent with application number 2018103856604, including a moving mold, a male mold, a female mold and a fixed mold; the lower part of the moving die is provided with a male die, the upper part of the fixed die is provided with a female die, the moving die and the male die as well as the fixed die and the female die are all detachably connected, the male die and the female die are both provided with a refrigeration pipeline, and the refrigeration pipeline is arranged in a pipeline mounting groove; terrace die and die on the mould can conveniently be dismantled in this scheme, and the condenser tube can conveniently be cleared up simultaneously, but, in the use, this scheme only mechanical assurance condenser tube can conveniently clear up, can not realize including the product completion back of moulding plastics, other functions including the automatic drawing of patterns, the function is single, and manufacturing cost is higher.

Disclosure of Invention

The invention provides an injection mold, which aims to make up the defects of the prior art and solve the problems that the mold is difficult to disassemble and replace and a cooling water channel in the mold is difficult to clean.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an injection mold, which comprises a mold base, wherein a circular groove is formed in the surface of the mold base; a mold core is arranged in the circular groove; the mold core is provided with a cavity; the die holder is provided with a spiral groove; the number of the spiral grooves is multiple, and the spiral grooves are uniformly distributed on the side wall of the circular groove; a fixing column is arranged on the side surface of the mold core; the fixed columns are multiple in number and correspond to the spiral grooves one by one; the fixing column can be inserted into the spiral groove; a first cavity is formed in the die holder; a vertical column is arranged in the first cavity; a third spring is arranged in the first cavity; the vertical column is subjected to a three-way downward pulling force of a spring; the upper end of the vertical column is provided with a pull-out hook; the fixing column is provided with a through hole; the diameter of the through hole is equal to that of the vertical column; after the mold core is completely installed in the circular groove, the vertical column penetrates through the through hole in the fixing column; a cavity II is formed in the die holder; the cavity two is positioned right below the cavity one and communicated with the cavity one; the lower end of the vertical column can be inserted into the second cavity; a magnetic block is arranged in the cavity II; a spring IV is arranged in the cavity II; the spring IV is positioned below the magnetic block; the magnetic block can be extruded by the vertical column; the magnetic block can keep the magnetism not to disappear in a high-temperature environment; a third cavity is formed in the die holder; the cavity III is perpendicular to the cavity II and communicated to the circular groove; a transverse column is arranged in the cavity III; a spring V is arranged in the cavity III; the transverse column is subjected to the elastic force of a spring five in the direction away from the circular groove; the mold core is provided with a fixed hole; the fixing hole is opposite to an outlet of the cavity, which is positioned in the circular groove, and the transverse column can be inserted into the fixing hole; magnetic field force repelling each other exists between the transverse columns and the magnetic blocks; after the mold core is fixed in the mold base, a sealing block is arranged at the opening of the spiral groove; the upper end of the sealing block is provided with a pull-out hook;

when the mould core fixing device works, the mould core is placed in the circular groove on the mould base, the fixing column on the side face of the mould core is inserted into the spiral groove on the mould base and is completely inserted into the spiral groove along with the rotation direction of the spiral groove to complete the fixing of the mould core, when the mould core is completely inserted into the mould base, the fixing column reaches the bottom of the spiral groove, the vertical column in the first cavity and the through hole on the fixing column are positioned on the same straight line, the vertical column penetrates through the through hole on the fixing column under the action of the pulling force of the third spring, the mould core is fixed through the vertical column, the mould core is prevented from moving in the spiral groove due to the influence of vibration in the using process, the precision of a product is reduced, meanwhile, the situation that the mould core is loosened and the mould is collided in the injection molding process to cause the damage of the mould is avoided, meanwhile, the third spring is driven to generate elastic deformation, meanwhile, after the vertical column penetrates through the through hole in the fixed column, the vertical column is inserted into the second cavity, the vertical column pushes the magnetic block to move downwards, the magnetic block and the transverse column are positioned on the same straight line, the magnetic field force between the magnetic block and the transverse column is maximized, and the magnetic field force exceeds the elastic force of the fifth spring, so that the transverse column is inserted into the fixed hole in the mold core, the mold core is further fixed, the mold core is prevented from loosening or deviating, the product is deformed or staggered grains are generated on the product during injection molding, meanwhile, after the mold core is completely fixed in the mold base, the sealing block is used for sealing the opening of the spiral groove, impurities and plastic liquid are prevented from entering the spiral groove during the use of the mold, the mold core and the mold base are blocked and difficult to disassemble, meanwhile, when different products are produced, the mold core can be replaced quickly by replacing the mold, the production speed is accelerated, and meanwhile, the time spent on replacing the die is reduced.

Preferably, the lower surface of the mold core is provided with a heat conducting cavity; the lower end of the mold core is contacted with the bottom surface of the circular groove; a water cooling pipeline is arranged in the heat conduction cavity; a gap between the water cooling pipeline and the heat conducting cavity is filled with a heat conducting medium; the heat conducting cavity is sealed by the bottom surface of the circular groove; a cooling water inlet and a cooling water outlet are respectively arranged on two opposite side surfaces of the die holder; the cooling water inlet and the cooling water outlet are connected into an external cooling circulation system; two ends of a water cooling pipeline in the heat conduction cavity are respectively connected to a cooling water inlet and a cooling water outlet;

the during operation, the installation of heat conduction intracavity in the mold core is water-cooling pipeline, control the mould temperature at the in-process of moulding plastics, guarantee that the mold core is in the predetermined range at the in-process temperature of moulding plastics, and simultaneously, because the mold core can easily be dismantled from the die holder, after the mould uses for a long time, there are impurity and incrustation scale in the water-cooling pipeline, when leading to cooling water to slow down or block up through speed in the pipeline, dismantlement mould that can relax washs the water-cooling pipeline, guarantee the control effect of water-cooling pipeline to the temperature in the mold core, avoid moulding plastics in-process mold core temperature out of control, lead to product quality to receive the.

Preferably, a guide frame is arranged in the cooling water inlet; the guide frame is provided with a connecting rod; one end of the cooling water inlet close to the circular groove is provided with a rubber ring; the rubber ring is fixedly connected to the tail end of the connecting rod through a support; the cooling water inlet is internally provided with a step part, and the part with the larger diameter of the step part is directly communicated to the opening on the side wall of the circular groove; a first spring is arranged in the cooling water inlet; the rubber ring is subjected to the tension of the first spring; the rubber ring can extend out of the cooling water inlet and is tightly attached to the outlet and the inlet of the water cooling pipeline in the mold core; an umbrella-shaped plate is arranged on the connecting rod; the umbrella-shaped plate has certain elasticity, and can be inserted into the part with smaller diameter in the cooling water inlet; the opening of the umbrella-shaped plate faces to the direction far away from the circular groove; a cavity IV is formed in the die holder; the cavity four positions are positioned right above the cooling water inlet and are parallel to each other; a sliding block is arranged in the cavity IV; a second spring is arranged in the cavity IV; the sliding block is subjected to the elastic force of the second spring towards the circular groove direction; the sliding block is provided with a groove; a reed is arranged in the groove, and the protruding part of the reed can be inserted into the cooling water inlet to block the guide frame from moving; the sliding block is provided with a pushing plate; the push plate is inserted into the cooling water inlet; the pushing plate and the reed are respectively positioned at two ends of the sliding block; the distance between the pushing plate and the center of the circular groove is smaller than the distance between the guide frame and the center of the circular groove; the water cooling pipeline on the mold core is communicated with the cooling water outlet, and the same components in the cooling water inlet are arranged in the water cooling pipeline of the mold core;

when the cooling water injection mold works, external cooling water is pumped in from a cooling water inlet through a cooling water circulation system and is pumped out from a cooling water outlet, meanwhile, because the mold core and the mold base are mutually independent and certain pressure exists in the cooling water-proof circulation process, the connection part of a water cooling pipeline on the mold base and the mold core needs to be well sealed, the cooling water is prevented from leaking, meanwhile, after the cooling water is pumped into the mold through the cooling water inlet, the cooling water pushes an umbrella-shaped plate in a cooling water inlet to move, so that a rubber ring is driven by a connecting rod to move, the rubber ring is inserted into the water cooling pipeline inlet in the mold core, the sealing performance of the connection part of the mold base and the mold core is improved, the cooling water leakage at the connection part of the mold core in the injection molding process is prevented, the machine equipment is damaged, meanwhile, the influence of the temperature control of the mold core due to the cooling water leakage is avoided, the guide frame moves along with the mold core and passes over the reeds protruding from the side wall of the cooling water inlet, so that the guide frame is blocked by the reeds, the guide frame is prevented from returning to the original position, the sealing effect of the rubber ring is reduced, meanwhile, when the mold core needs to be disassembled for replacement or the water cooling pipeline needs to be cleaned, cooling water is firstly reversely introduced, the reversely introduced cooling water pushes the push plate in the cooling water inlet to move, the push plate drives the sliding block in the cavity IV to move after moving, the reeds are under the action of the sliding block, the reeds are retracted into the cavity IV, the blocking on the guide frame is removed, so that the rubber ring returns to the cooling water inlet under the action of the tensile force of the spring I, the connection between the mold base and the mold core is removed, the forced disassembly is avoided, the mold core and the mold base are blocked, the rubber ring is damaged or the cooling water inlet is damaged, the gap is increased, and the sealing, leakage of cooling water occurs.

Preferably, a second heat conduction plate is arranged in the heat conduction cavity; the upper surface of the second heat conducting plate is tightly attached to the bottom surface of the heat conducting cavity; a honeycomb plate is arranged in the heat conduction cavity; the upper end of the honeycomb plate is tightly attached to the lower surface of the second heat conducting plate; through holes are uniformly formed in the honeycomb plate; a second flow passage is formed in the lower surface of the second heat conducting plate; the second flow channel enables the upper ends of the through holes in the honeycomb plate to be communicated with each other; a first heat conducting plate is arranged in the heat conducting cavity; the lower end of the honeycomb plate is tightly attached to the upper surface of the first heat conducting plate; a first flow channel is formed in the upper surface of the first heat conducting plate; the second flow channel enables the lower ends of the through holes in the honeycomb plate to be communicated with each other; the shape of the first flow channel is the same as that of the flow channel; the first flow channel is communicated with the lower ends of the through holes in the honeycomb plate in a one-way mode in sequence; one side surface of the heat conducting plate is provided with a first connecting port and a second connecting port; the first connecting port and the second connecting port are respectively communicated with two ends of the first flow channel; the first connecting port is communicated with a cooling water inlet; the second connecting port is communicated with a cooling water outlet;

in the working process, in the injection molding process, the first heat-conducting plate, the second heat-conducting plate and the through holes on the honeycomb plate form a cooling water channel, cooling water passes through the cooling water channel, the temperature of the mold core is controlled, meanwhile, the cooling water channel formed among the three can obviously increase the movement path length of the cooling water in the mold core, the effect of controlling the temperature of the mold core is improved, and meanwhile, in the injection molding stage, the heat in the mold core can be taken away as fast as possible, the product molding is accelerated, the production speed is improved, meanwhile, the shapes of the first flow channel and the second flow channel are changed by replacing the first heat-conducting plate and the second heat-conducting plate which are different, so that the circulation path of the cooling water in the mold core is changed, the temperatures of different positions of the mold core are controlled.

Preferably, the upper surface of the second heat conducting plate is provided with an installation groove; a moving plate is arranged in the mounting groove in a sliding manner; a plate spring is arranged in the mounting groove; the plate spring is positioned on the left side of the moving plate; a cavity V is formed in the mold core; an extrusion column is arranged in the cavity V; the extrusion column is extruded by the die in the injection molding process and completely returns to the cavity V; a hinged plate is arranged in the cavity V; the hinged plate is positioned below the extrusion column and is extruded in the process that the extrusion column returns to the cavity five; the hinged plate can move freely in the cavity V; the lower end of the cavity V is communicated with the mounting groove on the upper surface of the heat conducting plate II; the left end of the hinged plate can be pressed to push the movable plate to move; an ejection cavity is formed in the die core; an ejection column is arranged in the ejection cavity; the upper end of the ejection column can extend into the cavity; a first micropore is formed below the ejection cavity; a second micropore is formed in the moving plate; the second micropore can be communicated with the first micropore; a micropore III is formed in the heat conducting plate II; the first micropore and the third micropore are positioned on the same straight line; a first pressure relief channel is formed in the upper surface of the moving plate; the upper surface of the heat conducting plate II is provided with a pressure relief channel II; after the movable plate is extruded by the hinge column to move, a first pressure relief channel on the movable plate is communicated with a second pressure relief channel on the upper surface of the second heat conducting plate; after the movable plate is extruded by the hinge columns to move, the second micropores on the movable plate are staggered with the first micropores, and the first pressure relief channels on the movable plate are communicated with the first micropores; the second pressure relief channel is communicated with a pressure relief opening in the die holder, and cooling water in the ejection cavity can be discharged through the pressure relief opening;

when the injection molding machine works, the extrusion column on the mold core is extruded and is completely pushed into the cavity V, after the extrusion column enters the cavity V, the lower end of the extrusion column extrudes the hinged plate in the cavity V to enable the hinged plate to move, the movable plate in the mounting groove on the heat conducting plate II is pushed to move through the movement of the hinged plate, meanwhile, after the movable plate moves, the micropores II on the movable plate are staggered with the micropores II on the ejection cavity to interrupt the communication between the micropores I and the micropores III, so that cooling water is prevented from entering the ejection cavity to push the ejection column to extend out, meanwhile, after the movable plate moves, the pressure relief channel I on the movable plate is communicated with the micropores I, so that high-pressure cooling water in the ejection cavity is discharged through the pressure relief channel I and the pressure relief channel II, the ejection column descends and retracts into the ejection cavity, and the product influence of the ejection column in the injection molding process is avoided, the indentation appears on the surface of the product, the quality of the product is affected, meanwhile, after the injection molding is finished, the extrusion column on the mold core is not extruded, the extrusion column releases the extrusion on the hinged plate, no acting force exists between the hinged plate and the moving plate, the moving plate returns to the original position under the action of the plate spring, so that the first micropore and the second micropore on the moving plate are communicated, thereby leading the first micropore to be communicated with the third micropore, leading the high-pressure cooling water to enter the ejection cavity, leading the ejection column to rise, pushing the injection molded long and safe product out of the cavity, completing the automatic demoulding of the product, reducing the manual operation, reducing the labor intensity, improving the production speed, and simultaneously, after the moving plate returns to the original position, the moving plate pushes the hinged plate to return the hinged plate to the original shape, at the same time, the hinge plate returning to its original shape exerts an upward urging force on the compression column, causing the compression column to rise from within the cavity five.

Preferably, the ejection columns in the cavity can be arranged at different positions according to different product shapes; the upper end of the ejection column is flush with the surface of the cavity; the ejection heights of the ejection columns are equal;

during operation, through setting up ejecting post in the different positions of die cavity, can improve the effect of the automatic drawing of patterns of product, simultaneously, avoid ejecting post position to set up unreasonablely, lead to the product when automatic drawing of patterns, the product weak department receives ejecting post extrusion, leads to the product indentation or damage to appear, leads to the product disability rate to rise, increases manufacturing cost.

The invention has the following beneficial effects:

1. according to the injection mold, the mold base, the mold core, the spiral groove, the fixing column, the vertical column, the magnetic block and the transverse column are arranged, the mold core can be fixed in the vertical direction through the transverse column after being inserted into the mold base, meanwhile, the mold core is prevented from rotating through the vertical column, the fixing effect of the mold base on the mold core is improved through double fixing, the mold core is prevented from being loosened in the working process, the product quality is poor, meanwhile, through the arrangement, the mold core can be easily disassembled, the mold core can be replaced, and a water cooling pipeline in the mold core can be cleaned

2. According to the injection mold, the first heat conduction plate, the second heat conduction plate and the honeycomb plate are arranged, so that the circulation path of cooling water in the mold core can be increased, the control effect on the temperature of the mold core is improved, meanwhile, the flow path of the cooling water in the mold core can be changed by replacing the first heat conduction plate and the second heat conduction plate, the temperature distribution in the mold core is changed, and the product quality is improved.

3. According to the injection mold, the movable plate, the hinged plate and the extrusion column are used, after injection molding is completed, high-pressure cooling water in the mold core can be input into the ejection cavity to push the ejection column to eject, so that automatic demolding of a product is realized, and production efficiency is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural diagram of the upper surface of the second thermal conductive plate of the present invention;

FIG. 4 is a schematic view of the structure of the lower surface of the second heat-conducting plate;

FIG. 5 is a schematic structural view of a honeycomb panel of the present invention;

FIG. 6 is a schematic view of the structure of an upper surface of the thermal plate of the present invention;

FIG. 7 is a partial cross-sectional view of a cooling water inlet on the die holder of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 1 at A;

FIG. 9 is an enlarged view of a portion of FIG. 2 at B;

in the figure: the die holder 1, the spiral groove 11, the seal block 12, the cooling water inlet 13, the guide frame 131, the connecting rod 132, the umbrella-shaped plate 133, the first spring 134, the rubber ring 135, the sliding block 136, the second spring 137, the reed 138, the push plate 139, the pressure relief opening 14, the vertical column 15, the third spring 151, the magnetic block 16, the fourth spring 161, the transverse column 17, the fifth spring 171, the die core 2, the die cavity 21, the extrusion column 22, the hinge plate 221, the ejection column 23, the first micropore 231, the fixed column 24, the honeycomb plate 3, the first heat-conducting plate 4, the first runner 41, the first connector 42, the second connector 43, the second heat-conducting plate 5, the mounting groove 51, the moving plate 52, the first pressure relief channel 521, the second micropore 522, the second runner 53, the second pressure relief channel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 9, the injection mold of the present invention includes a mold base 1, wherein a circular groove is formed on a surface of the mold base 1; a mold core 2 is arranged in the circular groove; the mold core 2 is provided with a cavity 21; the die holder 1 is provided with a spiral groove 11; the number of the spiral grooves 11 is multiple, and the spiral grooves are uniformly distributed on the side wall of the circular groove; a fixing column 24 is arranged on the side surface of the mold core 2; the fixed columns 24 are multiple in number and correspond to the spiral grooves 11 one by one; the fixing column 24 can be inserted into the spiral groove 11; a first cavity is formed in the die holder 1; a vertical column 15 is arranged in the first cavity; a spring III 151 is arranged in the cavity I; the vertical column 15 is pulled downwards by a third spring 151; the upper end of the vertical column 15 is provided with a pull-out hook; the fixing column 24 is provided with a through hole; the diameter of the through hole is equal to the diameter of the vertical column 15; after the mold core 2 is completely installed in the circular groove, the vertical column 15 passes through the through hole on the fixed column 24; a cavity II is formed in the die holder 1; the cavity two is positioned right below the cavity one and communicated with the cavity one; the lower end of the vertical column 15 can be inserted into the second cavity; a magnetic block 16 is arranged in the second cavity; a spring IV 161 is arranged in the cavity II; the spring four 161 is positioned below the magnetic block 16; the magnetic block 16 can be pressed by the vertical column 15; the magnetic block 16 can keep the magnetism not to disappear under the high-temperature environment; a third cavity is formed in the die holder 1; the cavity III is perpendicular to the cavity II and communicated to the circular groove; a transverse column 17 is arranged in the cavity III; a spring five 171 is arranged in the cavity three; the transverse column 17 is subjected to the elastic force of a fifth spring 171 in the direction away from the circular groove; the die core 2 is provided with a fixed hole; the fixing hole is opposite to the outlet of the cavity, which is positioned in the circular groove, and the transverse column 17 can be inserted into the fixing hole; mutually repulsive magnetic field force exists between the transverse column 17 and the magnetic block 16; after the mold core 2 is fixed in the mold base 1, a sealing block 12 is arranged at an opening of the spiral groove 11; the upper end of the sealing block 12 is provided with a pull-out hook;

when the die core 2 is in operation, the die core 2 is placed in the circular groove of the die holder 1, the fixing column 24 on the side surface of the die core 2 is inserted into the spiral groove 11 of the die holder 1 and is completely inserted into the spiral groove 11 along with the rotation direction of the spiral groove 11, the fixing of the die core 2 is completed, when the die core 2 is completely inserted into the die holder 1, the fixing column 24 reaches the bottom of the spiral groove 11, the vertical column 15 in the first cavity and the through hole on the fixing column 24 are in the same straight line, the vertical column 15 penetrates through the through hole on the fixing column 24 under the action of the pulling force of the spring III 151, the die core 2 is fixed through the vertical column 15, the die core 2 is prevented from moving in the spiral groove 11 due to the influence of vibration in the use process, the precision of a product is reduced, meanwhile, the phenomenon that the die core 2 is loosened and collided among dies in the, the vertical column 15 is extruded and pushed by the fixed column 24, so that the vertical column 15 is lifted upwards to drive the spring third 151 to generate elastic deformation, meanwhile, after the vertical column 15 penetrates through the through hole on the fixed column 24, the vertical column 15 is inserted into the cavity second, the vertical column 15 pushes the magnetic block 16 to move downwards, so that the magnetic block 16 and the transverse column 17 are positioned on the same straight line, the magnetic field force between the magnetic block and the transverse column reaches the maximum, the magnitude of the magnetic field force exceeds the elastic force of the spring fifth 171, the transverse column 17 is inserted into the fixed hole in the mold core 2, the mold core 2 is further fixed, the mold core 2 is prevented from loosening or deviating, the product is deformed or misplaced on the product during injection molding, meanwhile, after the mold core 2 is completely fixed in the mold base 1, the seal block 12 is used for sealing the opening of the spiral groove 11, and impurities and plastic liquid are prevented from entering the spiral groove 11 during the use of the mold, the die core 2 and the die holder 1 are blocked and difficult to detach, and meanwhile, when different products are produced, the die core 2 can be replaced to quickly complete replacement of the die, so that the production speed is accelerated, and meanwhile, the time spent on die replacement is shortened.

As an embodiment of the invention, a heat conducting cavity is arranged on the lower surface of the mold core 2; the lower end of the mold core 2 is contacted with the bottom surface of the circular groove; a water cooling pipeline is arranged in the heat conduction cavity; a gap between the water cooling pipeline and the heat conducting cavity is filled with a heat conducting medium; the heat conducting cavity is sealed by the bottom surface of the circular groove; two opposite side surfaces of the die holder 1 are respectively provided with a cooling water inlet 13 and a cooling water outlet; the cooling water inlet 13 and the cooling water outlet are connected to an external cooling circulation system; two ends of a water cooling pipeline in the heat conduction cavity are respectively connected to a cooling water inlet 13 and a cooling water outlet;

the during operation, the installation of heat conduction intracavity in the mold core 2 is water-cooling pipeline, control the mould temperature at the in-process of moulding plastics, guarantee that mold core 2 is in the predetermined range at the in-process temperature of moulding plastics, and simultaneously, because the mold core 2 can easily be dismantled from the die holder 1, after the mould is used for a long time, there are impurity and incrustation scale in the water-cooling pipeline, when leading to cooling water to slow down or block up through speed in the pipeline, dismantlement mould that can relax washs water-cooling pipeline, guarantee the control effect of water-cooling pipeline to the temperature in the mold core 2, avoid moulding plastics in-process 2 temperature out of control, lead to product quality to receive influence or the product.

As an embodiment of the present invention, a guide frame 131 is installed in the cooling water inlet 13; the guide frame 131 is provided with a connecting rod 132; one end of the cooling water inlet 13 close to the circular groove is provided with a rubber ring 135; the rubber ring 135 is fixedly connected to the tail end of the connecting rod 132 through a bracket; the cooling water inlet 13 is internally provided with a step part, and the part with the larger diameter of the step part is directly communicated with an opening on the side wall of the circular groove; a first spring 134 is arranged in the cooling water inlet 13; the rubber ring 135 is under the tension of a first spring 134; the rubber ring 135 can extend out of the cooling water inlet 13 and is tightly attached to the outlet and the inlet of the water cooling pipeline in the mold core 2; an umbrella-shaped plate 133 is arranged on the connecting rod 132; the umbrella-shaped plate 133 has certain elasticity, and the umbrella-shaped plate 133 can be inserted into a part with a smaller diameter in the cooling water inlet 13; the opening of the umbrella-shaped plate 133 faces away from the circular groove; a fourth cavity is formed in the die holder 1; the cavity IV is positioned right above the cooling water inlet 13, and the cavity IV and the cooling water inlet 13 are parallel; a sliding block 136 is arranged in the cavity IV; a second spring 137 is arranged in the cavity IV; the sliding block 136 is subjected to the elastic force of a second spring 137 towards the circular groove direction; the sliding block 136 is provided with a groove; a reed 138 is arranged in the groove, and the convex part of the reed 138 can be inserted into the cooling water inlet 13 to block the guide frame 131 from moving; the slide block 136 is provided with a push plate 139; the push plate 139 is inserted into the cooling water inlet 13; the pushing plate 139 and the spring leaf 138 are respectively positioned at two ends of the sliding block 136; the distance between the pushing plate 139 and the center of the circular groove is smaller than the distance between the guide frame 131 and the center of the circular groove; the water cooling pipeline on the mold core 2 is communicated with the cooling water outlet, and the same components in the cooling water inlet 13 are arranged in the water cooling pipeline of the mold core 2;

when the injection molding machine works, external cooling water is pumped in from the cooling water inlet 13 and pumped out from the cooling water outlet through the cooling water circulation system, meanwhile, because the mold core 2 and the mold base 1 are mutually independent and certain pressure exists in the cooling and water-proof circulation process, the connection part of the water-cooling pipeline on the mold base 1 and the mold core 2 needs to be well sealed to prevent the cooling water from leaking, meanwhile, after the cooling water is pumped into the mold through the cooling water inlet 13, the cooling water pushes the umbrella-shaped plate 133 in the cooling water inlet 13 to move, so that the connecting rod 132 drives the rubber ring 135 to move, the rubber ring 135 is inserted into the water-cooling pipeline inlet part in the mold core 2, the sealing performance of the connection part of the mold core 2 and the cooling water leakage at the connection part of the mold core and the machine equipment are prevented from being leaked in the injection molding process, meanwhile, the temperature control of the mold core 2 is prevented from being influenced, meanwhile, when the umbrella-shaped plate 133 is pushed by the action of cooling water, the guide frame 131 moves along with the umbrella-shaped plate and crosses the reed 138 protruding from the side wall of the cooling water inlet 13, so that the guide frame 131 is blocked by the reed 138, the guide frame 131 is prevented from returning to the original position, and the sealing effect of the rubber ring 135 is reduced, meanwhile, when the mold core 2 needs to be disassembled for replacement or the water cooling pipeline needs to be cleaned, cooling water is firstly reversely introduced, the reversely introduced cooling water pushes the push plate 139 in the cooling water inlet 13 to move, after the push plate 139 moves, the slider 136 in the cavity IV is driven to move, so that the reed 138 is under the action of the slider 136, the reed 138 is retracted into the cavity IV, the blocking of the guide frame 131 is removed, the rubber ring 135 returns to the cooling water inlet 13 under the pulling force of the spring I134, the connection between the mold base 1 and the mold core 2 is removed, and the forced disassembly, the mold core 2 and the mold base 1 are blocked or the rubber ring 135 is damaged or the cooling water inlet 13 is damaged, the gap is increased, the sealing performance of the cooling water in the subsequent injection molding process is reduced, and the cooling water leakage is caused.

As an embodiment of the invention, a second heat conducting plate 5 is arranged in the heat conducting cavity; the upper surface of the second heat conducting plate 5 is tightly attached to the bottom surface of the heat conducting cavity; a honeycomb plate 3 is arranged in the heat conduction cavity; the upper end of the honeycomb plate 3 is tightly attached to the lower surface of the second heat conducting plate 5; through holes are uniformly formed in the honeycomb plate 3; a second flow passage 53 is formed in the lower surface of the second heat conducting plate 5; the second flow channel 53 enables the upper ends of the through holes in the honeycomb plate 3 to be communicated with each other; a first heat conducting plate 4 is arranged in the heat conducting cavity; the lower end of the honeycomb plate 3 is tightly attached to the upper surface of the first heat conducting plate 4; a first flow passage 41 is formed in the upper surface of the first heat conducting plate 4; the second flow channel 53 enables the lower ends of the through holes in the honeycomb plate 3 to be communicated with each other; the first flow channel 41 and the second flow channel 53 have the same shape; the first flow channel 41 is communicated with the lower ends of the through holes in the honeycomb plate 3 in a one-way mode in sequence; a first connecting port 42 and a second connecting port 43 are formed on the side surface of the first heat conducting plate 4; the first connecting port 42 and the second connecting port 43 are respectively communicated with two ends of the first flow channel 41; the first connecting port 42 is communicated with the cooling water inlet 13; the second connecting port 43 is communicated with a cooling water outlet;

during operation, in the injection molding process, the first heat-conducting plate 4, form the cooling water passageway between the through-hole on the second heat-conducting plate 5 and the honeycomb panel 3, the cooling water passes through, control the temperature of mold core 2, and simultaneously, the cooling water passageway that forms between the above-mentioned three can obviously increase the movement path length of cooling water in mold core 2, improve the effect to mold core 2 temperature control, and simultaneously, in the injection molding stage, can take away the heat in mold core 2 as fast as possible, accelerate product molding, improve production speed, simultaneously, through changing different first heat-conducting plate 4 and second heat-conducting plate 5, change the shape of runner one 41 and runner two 53, thereby change the circulation route of cooling water in mold core 2, control the temperature of mold core 2 different positions, the temperature control effect when improving product molding, improve product quality.

As an embodiment of the invention, the upper surface of the second heat conducting plate 5 is provided with a mounting groove 51; a moving plate 52 is arranged in the mounting groove 51 in a sliding manner; a plate spring 55 is arranged in the mounting groove 51; the plate spring 55 is located on the left side of the moving plate 52; a cavity V is formed in the mold core 2; an extrusion column 22 is arranged in the cavity five; the extrusion column 22 is extruded by the mould in the injection molding process and completely returns to the cavity five; a hinge plate 221 is installed in the cavity V; the hinge plate 221 is positioned below the extrusion column 22 and is extruded in the process that the extrusion column 22 returns to the cavity five; the hinge plate 221 is free to move within the cavity five; the lower end of the cavity V is communicated with a mounting groove 51 on the upper surface of the heat conducting plate II 5; the left end of the hinge plate 221 can press the push moving plate 52 to move; an ejection cavity is formed in the mold core 2; the ejection cavity is internally provided with an ejection column 23; the upper end of the ejection column 23 can extend into the cavity 21; a first micropore 231 is formed below the ejection cavity; the moving plate 52 is provided with a second micropore 522; the second micropore 522 can be communicated with the first micropore 231; a micropore III 56 is formed in the heat conducting plate II 5; the first micropore 231 and the third micropore 56 are in the same straight line; the upper surface of the moving plate 52 is provided with a pressure relief channel I521; a second pressure relief channel 54 is formed in the upper surface of the second heat conducting plate 5; after the moving plate 52 is extruded by the hinge columns to move, a first pressure relief channel 521 on the moving plate 52 is communicated with a second pressure relief channel 54 on the upper surface of the second heat conducting plate 5; after the moving plate 52 is extruded by the hinge columns to move, the second micropore 522 and the first micropore 231 on the moving plate 52 are staggered, and the first pressure relief channel 521 on the moving plate 52 is communicated with the first micropore 231; the second pressure relief channel 54 is communicated with a pressure relief opening 14 on the die holder 1, and cooling water in the ejection cavity can be discharged through the pressure relief opening 14;

during operation, in the injection molding process, the extrusion column 22 on the mold core 2 is extruded and is completely pushed into the cavity five, after the extrusion column 22 enters the cavity five, the lower end of the extrusion column 22 extrudes the hinge plate 221 in the cavity five, so that the hinge plate 221 moves, the moving plate 52 in the mounting groove 51 on the heat conducting plate two 5 is pushed to move through the movement of the hinge plate 221, meanwhile, after the moving plate 52 moves, the micropores two 522 on the moving plate 52 are staggered with the micropores two 522 on the ejection cavity, the communication between the micropores one 231 and the micropores three 56 is interrupted, the cooling water is prevented from entering the ejection cavity, the ejection column 23 is pushed to extend, meanwhile, after the moving plate 52 moves, the pressure relief channel one 521 on the moving plate 52 is communicated with the micropores one 231, the high-pressure cooling water in the ejection cavity is discharged through the pressure relief channel one 521 and the pressure relief channel two 54, so that the ejection column 23 descends and retracts into the ejection cavity, the product is prevented from being influenced in the injection molding process by the ejection column, so that the surface of the product is indented and the quality of the product is influenced, meanwhile, after the injection molding is finished, the extrusion column 22 on the mold core 2 is not extruded, the extrusion column 22 releases the extrusion on the hinge plate 221, no acting force exists between the hinge plate 221 and the moving plate 52, the moving plate 52 returns to the original position under the action of the plate spring 55, the first micropore 231 and the second micropore 522 on the moving plate 52 are communicated, the first micropore 231 and the third micropore 56 are communicated, high-pressure cooling water can enter the ejection cavity, the ejection column 23 is lifted, the injection molded long and flat product is pushed out of the mold cavity 21, the automatic demolding of the product is finished, the manual operation is reduced, the labor intensity is reduced, the production speed is improved, meanwhile, after the moving plate 52 returns to the original position, the hinge plate 221 is pushed by the moving plate 52, so that, at the same time, the hinge plate 221 returning to its original shape exerts an upward urging force on the compression column 22, causing the compression column 22 to rise from within the cavity five.

As an embodiment of the present invention, the ejection columns 23 in the cavity 21 may be disposed at different positions according to different product shapes; the upper end of the ejection column 23 is flush with the surface of the cavity 21; the ejection heights of the ejection columns 23 are equal;

during operation, through setting up ejecting post 23 in the different positions of die cavity 21, can improve the effect of the automatic drawing of patterns of product, simultaneously, avoid ejecting post 23 position to set up unreasonablely, lead to the product when automatic drawing of patterns, the product weak department receives ejecting post 23 extrusion, leads to the indentation or damage to appear in the product, leads to the product disability rate to rise, increases manufacturing cost.

The specific working process is as follows:

when the die holder works, the die core 2 is placed in the circular groove on the die holder 1, the fixing column 24 on the side surface of the die core 2 is inserted into the spiral groove 11 on the die holder 1 and is completely inserted into the spiral groove 11 along with the rotation direction of the spiral groove 11, the fixing of the die core 2 is completed, when the die core 2 is completely inserted into the die holder 1, the fixing column 24 reaches the bottom of the spiral groove 11, the vertical column 15 in the first cavity and the through hole on the fixing column 24 are in the same straight line, the vertical column 15 penetrates through the through hole on the fixing column 24 under the action of the pulling force of the third spring 151, the die core 2 is fixed through the vertical column 15, meanwhile, in the inserting process of the fixing column 24, the vertical column 15 is extruded and pushed by the fixing column 24, the vertical column 15 is lifted upwards, the third spring 151 is driven to generate elastic deformation, and meanwhile, after the vertical column 15 penetrates through the through hole on, the vertical column 15 pushes the magnetic block 16 to move downwards, so that the magnetic block 16 and the transverse column 17 are positioned on the same straight line, the magnetic field force between the magnetic block 16 and the transverse column 17 reaches the maximum, and the magnitude of the magnetic field force exceeds the elastic force of the five spring 171, so that the transverse column 17 is inserted into the fixing hole in the mold core 2; a water cooling pipeline is arranged in a heat conducting cavity in the die core 2, and meanwhile, the die core 2 can be easily detached from the die holder 1, so that impurities and scale exist in the water cooling pipeline after the die is used for a long time, and the water cooling pipeline is cleaned; external cooling water is pumped in from a cooling water inlet 13 and pumped out from a cooling water outlet through a cooling water circulating system, meanwhile, because the die core 2 and the die holder 1 are mutually independent and a certain pressure exists in the cooling and water-proof circulating process, the connection position of the water-cooling pipeline on the die holder 1 and the die core 2 needs to be well sealed, meanwhile, after the cooling water is pumped into the die through the cooling water inlet 13, the cooling water pushes an umbrella-shaped plate 133 in the cooling water inlet 13 to move, so that a connecting rod 132 drives a rubber ring 135 to move, the rubber ring 135 is inserted into the water-cooling pipeline inlet position in the die core 2, meanwhile, after the umbrella-shaped plate 133 is pushed by the action of the cooling water, a guide frame 131 moves along with the cooling water and passes through a reed 138 protruding from the side wall of the cooling water inlet 13, so that the guide frame 131 is blocked by the reed 138, and meanwhile, when the die core 2 needs to be disassembled for replacement or the, firstly, cooling water is reversely introduced, the reversely introduced cooling water pushes a pushing plate 139 in the cooling water inlet 13 to move, and after the pushing plate 139 moves, a sliding block 136 in a cavity IV is driven to move, so that a reed 138 is under the action of the sliding block 136, the reed 138 is retracted into the cavity IV, the blocking of the guide frame 131 is removed, and therefore the rubber ring 135 returns to the cooling water inlet 13 under the action of the pulling force of a spring I134, and the connection between the die holder 1 and the die core 2 is removed; in the injection molding process, a cooling water channel is formed among the heat-conducting plate I4, the heat-conducting plate II 5 and the through holes on the honeycomb plate 3 for cooling water to pass through, and meanwhile, the shapes of the flow channel I41 and the flow channel II 53 are changed by replacing different heat-conducting plates I4 and II 5, so that the circulation path of the cooling water in the mold core 2 is changed, and the temperatures of different positions of the mold core 2 are controlled; in the injection molding process, the extrusion column 22 on the mold core 2 is extruded and is completely pushed into the cavity five, after the extrusion column 22 enters the cavity five, the lower end of the extrusion column 22 extrudes the hinged plate 221 in the cavity five, so that the hinged plate 221 moves, the moving plate 52 in the mounting groove 51 on the heat conducting plate two 5 is pushed to move through the movement of the hinged plate 221, meanwhile, after the moving plate 52 moves, the micropore two 522 on the moving plate 52 is dislocated with the micropore two 522 on the ejection cavity, the communication between the micropore one 231 and the micropore three 56 is interrupted, meanwhile, after the moving plate 52 moves, the pressure relief channel one 521 on the moving plate 52 is communicated with the micropore one 231, high-pressure cooling water in the ejection cavity is discharged through the pressure relief channel one 521 and the pressure relief channel two 54, the ejection column 23 descends and retracts into the ejection cavity, and meanwhile, after the injection molding is completed, the extrusion column 22 on the mold core 2 is not extruded, the squeezing columns 22 relieve the squeezing of the hinge plates 221, no acting force exists between the hinge plates 221 and the moving plate 52, the moving plate 52 returns to the original position under the action of the plate springs 55, the first micropores 231 and the second micropores 522 on the moving plate 52 are communicated, the first micropores 231 and the third micropores 56 are communicated, high-pressure cooling water can enter the ejection cavity, the ejection columns 23 rise, the injection-molded long safety product is pushed out of the cavity 21, and automatic demolding of the product is completed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An injection mold, includes die holder (1), its characterized in that: a circular groove is formed in the surface of the die holder (1); a mold core (2) is arranged in the circular groove; a cavity (21) is formed in the mold core (2); a spiral groove (11) is formed in the die holder (1); the spiral grooves (11) are multiple in number and are uniformly distributed on the side wall of the circular groove; a fixing column (24) is arranged on the side surface of the mold core (2); the fixed columns (24) are multiple in number and correspond to the spiral grooves (11) one by one; the fixing column (24) can be inserted into the spiral groove (11); a first cavity is formed in the die holder (1); a vertical column (15) is arranged in the first cavity; a third spring (151) is arranged in the first cavity; the vertical column (15) is subjected to downward tension of a third spring (151); the upper end of the vertical column (15) is provided with a pull-out hook; the fixing column (24) is provided with a through hole; the diameter of the through hole is equal to that of the vertical column (15); after the mold core (2) is completely installed in the circular groove, the vertical column (15) penetrates through the through hole in the fixing column (24); a cavity II is formed in the die holder (1); the cavity two is positioned right below the cavity one and communicated with the cavity one; the lower end of the vertical column (15) can be inserted into the second cavity; a magnetic block (16) is arranged in the second cavity; a spring IV (161) is arranged in the cavity II; the spring four (161) is positioned below the magnetic block (16); the magnetic block (16) can be pressed by the vertical column (15); the magnetic block (16) can keep the magnetism not to disappear under the high-temperature environment; a third cavity is formed in the die holder (1); the cavity III is perpendicular to the cavity II and communicated to the circular groove; a transverse column (17) is arranged in the cavity III; a spring five (171) is arranged in the cavity three; the transverse column (17) is subjected to the elastic force of a spring five (171) in the direction away from the circular groove; the mold core (2) is provided with a fixing hole; the fixing hole is opposite to an outlet of the cavity, which is positioned in the circular groove, and the transverse column (17) can be inserted into the fixing hole; the mutual repulsive magnetic field force exists between the transverse column (17) and the magnetic block (16); after the mold core (2) is fixed in the mold base (1), a sealing block (12) is arranged at an opening of the spiral groove (11); the upper end of the sealing block (12) is provided with a pull-out hook.

2. An injection mold according to claim 1, characterized in that: a heat conducting cavity is formed in the lower surface of the mold core (2); the lower end of the mold core (2) is in contact with the bottom surface of the circular groove; a water cooling pipeline is arranged in the heat conduction cavity; a gap between the water cooling pipeline and the heat conducting cavity is filled with a heat conducting medium; the heat conducting cavity is sealed by the bottom surface of the circular groove; two opposite side surfaces of the die holder (1) are respectively provided with a cooling water inlet (13) and a cooling water outlet; the cooling water inlet (13) and the cooling water outlet are connected into an external cooling circulation system; and two ends of a water cooling pipeline in the heat conduction cavity are respectively connected to a cooling water inlet (13) and a cooling water outlet.

3. An injection mould according to claim 2, characterized in that: a guide frame (131) is arranged in the cooling water inlet (13); a connecting rod (132) is arranged on the guide frame (131); one end of the cooling water inlet (13) close to the circular groove is provided with a rubber ring (135); the rubber ring (135) is fixedly connected to the tail end of the connecting rod (132) through a support; the cooling water inlet (13) is internally provided with a step part, and the part with larger diameter of the step part is directly communicated to the opening on the side wall of the circular groove; a first spring (134) is arranged in the cooling water inlet (13); the rubber ring (135) is pulled by a first spring (134); the rubber ring (135) can extend out of the cooling water inlet (13) and is tightly attached to the outlet and the inlet of the water cooling pipeline in the mold core (2); an umbrella-shaped plate (133) is arranged on the connecting rod (132); the umbrella-shaped plate (133) has certain elasticity, and the umbrella-shaped plate (133) can be inserted into a part with smaller diameter in the cooling water inlet (13); the opening of the umbrella-shaped plate (133) faces to the direction far away from the circular groove; a fourth cavity is formed in the die holder (1); the cavity IV is positioned right above the cooling water inlet (13), and the cavity IV and the cooling water inlet are parallel to each other; a sliding block (136) is arranged in the cavity IV; a second spring (137) is arranged in the cavity IV; the sliding block (136) is subjected to the elastic force of a second spring (137) towards the direction of the circular groove; the sliding block (136) is provided with a groove; a reed (138) is arranged in the groove, and the protruding part of the reed (138) can be inserted into the cooling water inlet (13) to block the guide frame (131) from moving; the sliding block (136) is provided with a pushing plate (139); the push plate (139) is inserted into the cooling water inlet (13); the push plate (139) and the spring plate (138) are respectively positioned at two ends of the sliding block (136); the distance between the pushing plate (139) and the center of the circular groove is smaller than the distance between the guide frame (131) and the center of the circular groove; the water cooling pipeline on the mold core (2) is communicated with the cooling water outlet, and the same components in the cooling water inlet (13) are arranged in the water cooling pipeline of the mold core (2).

4. An injection mould according to claim 2, characterized in that: a second heat conducting plate (5) is arranged in the heat conducting cavity; the upper surface of the second heat conducting plate (5) is tightly attached to the bottom surface of the heat conducting cavity; a honeycomb plate (3) is arranged in the heat conduction cavity; the upper end of the honeycomb plate (3) is tightly attached to the lower surface of the second heat-conducting plate (5); through holes are uniformly formed in the honeycomb plate (3); a second flow passage (53) is formed in the lower surface of the second heat conducting plate (5); the second flow channel (53) enables the upper ends of the through holes in the honeycomb plate (3) to be communicated with each other; a first heat conducting plate (4) is arranged in the heat conducting cavity; the lower end of the honeycomb plate (3) is tightly attached to the upper surface of the heat-conducting plate I (4); a first flow channel (41) is formed in the upper surface of the first heat conducting plate (4); the second flow channel (53) enables the lower ends of the through holes in the honeycomb plate (3) to be communicated with each other; the first flow channel (41) and the second flow channel (53) are the same in shape; the first flow channel (41) is communicated with the lower ends of the through holes in the honeycomb plate (3) in a one-way mode in sequence; the side surface of the heat conducting plate I (4) is provided with a first connecting port (42) and a second connecting port (43); the first connecting port (42) and the second connecting port (43) are respectively communicated with two ends of the first flow channel (41); the first connecting port (42) is communicated with the cooling water inlet (13); and the second connecting port (43) is communicated with the cooling water outlet.

5. An injection mold according to claim 4, wherein: the upper surface of the second heat conducting plate (5) is provided with a mounting groove (51); a moving plate (52) is arranged in the mounting groove (51) in a sliding manner; a plate spring (55) is arranged in the mounting groove (51); the plate spring (55) is positioned at the left side of the moving plate (52); a cavity V is formed in the mold core (2); an extrusion column (22) is arranged in the cavity V; the extrusion column (22) is extruded by the mould in the injection molding process and completely returns to the cavity V; a hinge plate (221) is installed in the cavity V; the hinged plate (221) is positioned below the extrusion column (22) and is extruded in the process that the extrusion column (22) returns to the cavity five; the hinged plate (221) can move freely in the cavity five; the lower end of the cavity V is communicated with an installation groove (51) on the upper surface of the heat conducting plate II (5); the left end of the hinge plate (221) can extrude the push moving plate (52) to move; an ejection cavity is formed in the mold core (2); an ejection column (23) is arranged in the ejection cavity; the upper end of the ejection column (23) can extend into the cavity (21); a first micropore (231) is formed below the ejection cavity; a second micropore (522) is formed in the moving plate (52); the second micropore (522) can be communicated with the first micropore (231); a micropore III (56) is formed in the heat conducting plate II (5); the first micropore (231) and the third micropore (56) are positioned on the same straight line; a first pressure relief channel (521) is formed in the upper surface of the moving plate (52); a second pressure relief channel (54) is formed in the upper surface of the second heat conduction plate (5); after the movable plate (52) is extruded by the hinge columns to move, a first pressure relief channel (521) on the movable plate (52) is communicated with a second pressure relief channel (54) on the upper surface of the second heat conduction plate (5); after the movable plate (52) is extruded by the hinge columns to move, a second micropore (522) and a first micropore (231) on the movable plate (52) are staggered, and a first pressure relief channel (521) on the movable plate (52) is communicated with the first micropore (231); the second pressure relief channel (54) is communicated with a pressure relief opening (14) in the die holder (1), and cooling water in the ejection cavity can be discharged through the pressure relief opening (14).

6. An injection mold according to claim 1, characterized in that: the ejection columns (23) in the cavity (21) can be arranged at different positions according to different product shapes; the upper end of the ejection column (23) is flush with the surface of the cavity (21); the ejection heights of the ejection columns (23) are equal.