An injection mold component that is easy to release

Abstract

The invention relates to the field of injection molding, and discloses an injection mold assembly that is easy to demold, comprising a lower mold and an upper mold, wherein the lower mold comprises a lower mold base, a ring column and a fixed mold component are installed in the lower mold base, the fixed mold component comprises a core fixed mold located in the ring column, an upper fixed mold arranged at an upper open end of the ring column, and a side mold group located between the core fixed mold and the upper fixed mold, the inner ring surface of the upper fixed mold is provided with an annular groove, the side mold group comprises a plurality of side fixed molds distributed in an array along the circumferential direction of the core fixed mold, two adjacent side fixed molds are fitted with each other, the side fixed mold comprises a middle arc plate fitted with an outer circular surface of the core fixed mold, upper and lower ends of the middle arc plate are respectively extended with an upper arc plate and a lower arc plate in a direction away from the core fixed mold, initially, the outer arc surface of the middle arc plate is fitted with the inner ring surface of the upper fixed mold, the upper end surface of the middle arc plate is lower than the upper end surface of the upper fixed mold, the upper end surface of the middle arc plate is flush with the upper end surface of the core fixed mold, the upper arc plate is located in the annular groove, and the lower end surface of the upper arc plate is higher than the lower groove wall of the annular groove.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an injection mold component that is easy to demold. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. It heats and melts plastic particles, injects the molten plastic into the mold cavity, cools and molds, and then demolds the workpiece. It is suitable for mass production of plastic workpieces, but when there is an undercut structure on the plastic workpiece, such as Figure 1 The shape of the workpiece shown has an annular undercut at the upper opening. In this case, the forced demoulding technology is generally used, that is, the workpiece is directly forced out of the mold. However, this technology requires the material of the workpiece to have a certain plasticity and toughness. Otherwise, it is easy to cause the undercut structure of the workpiece to be damaged and affect the quality of the workpiece. Therefore, based on Figure 1 The workpiece is shown, and the present invention provides an injection mold component that is easy to demold. Summary of the invention

[0003] In order to solve the problems mentioned in the above background, the present invention provides an injection mold component that is easy to demold.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0005] An easy-to-release injection mold assembly comprises a lower mold and an upper mold, wherein the lower mold comprises a lower mold base, a ring column and a fixed mold component are installed in the lower mold base, the fixed mold component comprises a core fixed mold coaxially located in the ring column, an upper fixed mold coaxially arranged at an open end of the ring column and in an annular shape, and a side mold group located between the core fixed mold and the upper fixed mold, the upper end of the core fixed mold is open and the lower end is closed, the inner ring surface of the upper fixed mold is provided with an annular groove and the annular groove penetrates to the upper end surface of the upper fixed mold, and the side mold group comprises a plurality of side fixed molds distributed in an array along the circumferential direction of the core fixed mold, The two adjacent side fixed molds are fitted with each other and form a sliding fit along the radial direction of the core fixed mold. The side fixed mold includes a middle arc plate fitted with the outer circular surface of the core fixed mold. The upper end of the middle arc plate is extended with an upper arc plate in the direction away from the core fixed mold, and the lower end of the middle arc plate is extended with a lower arc plate in the direction away from the core fixed mold. Initially, the outer arc surface of the middle arc plate is fitted with the inner annular surface of the upper fixed mold, the upper end surface of the middle arc plate is lower than the upper end surface of the upper fixed mold, the upper end surface of the middle arc plate is flush with the upper end surface of the core fixed mold, the upper arc plate is located in the annular groove, and the lower end surface of the upper arc plate is higher than the lower groove wall of the annular groove.

[0006] As a further improvement and optimization of the present invention, several side fixed molds are divided into two types and are side fixed mold one and side fixed mold two. Side fixed mold one is located between two adjacent side fixed molds two, and side fixed mold two is located between two adjacent side fixed molds one. The outer sleeve of the core fixed mold is provided with a ring, which is fixedly connected to the ring column.

[0007] As a further improvement and optimization of the present invention, a lower bracket 2 extends from the bottom of the side fixed mold 2, and a pin hole 2 is arranged on the lower bracket 2. The pin hole 2 includes a vertical section and an inclined section. The inclined section is located below the vertical section. The distance between the inclined section and the core fixed mold decreases from bottom to top. A lug is arranged on the outer cylindrical surface of the core fixed mold, and a convex pin 1 is arranged on the lug. The convex pin 1 forms a sliding connection with the pin hole 2.

[0008] A guide rod 1 and a guide rod 2 are extended downward from the bottom of the lower bracket 2, and a guide rod 4 is radially installed in the ring column. The lower ends of the guide rod 1 and the guide rod 2 are provided with limit rings after passing through the guide rod 4, and the sleeve ring is also provided with an avoidance hole for avoiding the guide rod 2. The outer sleeve of the guide rod 1 is provided with a spring 1 located between the lower bracket 2 and the guide rod 4, and the outer sleeve of the guide rod 2 is provided with a spring 2 located between the sleeve ring and the guide rod 4.

[0009] As a further improvement and optimization of the present invention, the guide rod four and the ring column form a sliding fit.

[0010] As a further improvement and optimization of the present invention, a lower bracket 1 extends from the bottom of the side fixed mold 1, a pin hole 1 is provided on the lower bracket 1, the distance between the pin hole 1 and the core fixed mold decreases from bottom to top, and a convex pin 2 extends from the ring, and the convex pin 2 and the pin hole 1 form a sliding connection.

[0011] As a further improvement and optimization of the present invention, a guide rod three is radially slidably installed on the ring column, and the guide rod three is connected to the side fixed mold one.

[0012] As a further improvement and optimization of the present invention, a hydraulic rod is arranged in the lower die seat, and the hydraulic rod is connected to the core fixed die through a connecting bracket.

[0013] As a further improvement and optimization of the present invention, the upper mold includes an upper mold base, a movable mold arranged on the lower end surface of the upper mold base, and an injection nozzle arranged on the movable mold.

[0014] As a further improvement and optimization of the present invention, a convex tube extends from the lower closed end of the core fixed mold, the end of the convex tube is connected to the air compressor, and a piston is sleeved in the convex tube;

[0015] The lower closed end of the core fixed mold is provided with a lower auxiliary hole connected with the convex tube, and the lower auxiliary hole includes an upper hole section and a lower hole section. A lower nozzle is installed in the upper hole section, and a lower nozzle pipe extends from the bottom of the lower nozzle. The end of the lower nozzle pipe passes through the lower hole section and the piston. The outer sleeve of the lower nozzle pipe is provided with a spring three located between the piston and the lower closed end of the core fixed mold. Initially, the lower nozzle fills the upper hole section, and the spray hole on the lower nozzle is set on the side of the lower nozzle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this scheme, it is possible to achieve Figure 1The workpiece is processed by injection molding, and after the workpiece is injection molded, the workpiece can be separated from the lower mold by the corresponding movement of the fixed mold component. The workpiece is easy to demould without forced demoulding, and the workpiece is not easily damaged. On this basis, the demoulding between the workpiece and the entire lower mold can be achieved by moving the core fixed mold downward;

[0018] Specifically, during the downward movement of the core fixed mold, at the beginning, the convex pin 1 moves in the vertical section of the pin hole 2, and the side fixed mold 1 and the side fixed mold 2 do not move. The downward movement of the core fixed mold in this stage makes room for the subsequent side fixed mold 2. Then, the convex pin 1 moves in the inclined section of the pin hole 2, so that the lower bracket 2 and the side fixed mold 2 move close to the core fixed mold. When the convex pin 1 moves upside down in the pin hole 2, the core fixed mold moves downward and directly pulls the lower bracket 2 and the side fixed mold 2 downward together. The downward movement of the side fixed mold 2 makes room for the subsequent movement of the side fixed mold 1. After the lower bracket 2 contacts the sleeve ring, it will move downward with the sleeve ring. Through the cooperation of the convex pin 2 and the pin hole 1, the side fixed mold 1 moves close to the core fixed mold. When the convex pin 2 moves upside down in the pin hole 1, the side fixed mold 1 is separated from the undercut structure of the workpiece. At this time, the workpiece is not restricted by the lower mold, that is, the demolding between the workpiece and the lower mold is completed.

[0019] It can be seen that in this solution, it is only necessary to drive the core fixed mold downward. When the demolding between the core fixed mold and the workpiece is completed, the demolding between the side fixed mold and the workpiece is also completed at the same time, so the demolding efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a workpiece to be injection molded;

[0021] Figure 2 The schematic diagram of the present invention is when the mold is closed;

[0022] Figure 3 It is a schematic diagram of the present invention when the mold is opened;

[0023] Figure 4 is a cross-sectional view of the lower mold;

[0024] Figure 5 is the internal schematic diagram of the lower mold;

[0025] Figure 6 It is a cross-sectional view of the upper fixed mold, the core fixed mold and the side fixed mold;

[0026] Figure 7 It is a schematic diagram of the upper fixed mold, the core fixed mold and the side fixed mold;

[0027] Figure 8 Schematic diagram of side fixed mold 1, side fixed mold 2 and core fixed mold Figure 1 ;

[0028] Fig. 9Schematic diagram of side fixed mold 1, side fixed mold 2 and core fixed mold Figure 2 ;

[0029] Fig.10 It is a cross-sectional view of the core fixed mold and the lower auxiliary components;

[0030] Fig.11 It is a cross-sectional view of the upper mold.

[0031] The reference numerals in the accompanying drawings are:

[0032] 100, lower mold; 101, lower mold base; 102, ring column; 103, hydraulic rod; 104, connecting bracket; 105, upper fixed mold; 106, core fixed mold; 1061, lug; 1062, convex pin 1; 107, side fixed mold 1; 108, side fixed mold 2; 109, lower bracket 1; 110, pin hole 1; 111, lower bracket 2; 112, pin hole 2; 113, guide rod 1; 114, guide rod 2; 115, collar; 11 51. convex pin two; 1152. avoidance hole; 116. guide rod three; 117. guide rod four; 118. spring one; 119. spring two; 120. convex tube; 121. piston; 122. lower auxiliary component; 123. spring three; 200. upper mold; 201. upper mold base; 202. movable mold; 203. injection nozzle; 204. upper auxiliary component; 205. spring four; 206. ejector pin; 207. spring five; 208. connecting plate. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0034] In this solution, a refers to the workpiece, which is cylindrical in shape, with an upper end open and a lower end closed, and an annular undercut is provided on the periphery of the open end. The shape of the annular undercut is as follows: Figure 1 As shown in the enlarged image on the upper right, plastic buckets are commonly found in daily life.

[0035] Embodiment 1

[0036] Reference Figure 1-Figure 11 , an easy-to-release injection mold assembly, comprising a lower mold 100 and an upper mold 200, the two of which can form a Figure 1 The former is a fixed mold structure and the latter is a movable mold structure. As for the movement of the movable mold structure when the mold is opened and closed, it can be realized by the existing technology and will not be described in detail.

[0037] For ease of description, in this solution, the lower mold 100 and the upper mold 200 are arranged vertically for illustration.

[0038] Lower mold 100:

[0039] Reference Figure 4-Figure 6 The lower mold 100 includes a lower mold base 101, in which a ring column 102 and a fixed mold component are installed, wherein the fixed mold component includes a core fixed mold 106 coaxially located in the ring column 102, an upper fixed mold 105 coaxially arranged at the upper open end of the ring column 102 and in a ring shape, and a side mold group located between the core fixed mold 106 and the upper fixed mold 105. The core fixed mold 106 corresponds to the main body of the workpiece, and therefore has an open upper end and a closed lower end. The side mold group cooperates with the upper fixed mold 105, corresponding to the undercut structure of the workpiece.

[0040] Reference Figure 6 The inner ring surface of the upper fixed mold 105 is provided with an annular groove, and the annular groove penetrates to the upper end surface of the upper fixed mold 105.

[0041] Reference Figure 7 and Figure 8 The side mold assembly includes a plurality of side fixed molds distributed in an array along the circumferential direction of the core fixed mold 106. Two adjacent side fixed molds are attached to each other and form a sliding fit along the radial direction of the core fixed mold 106. Further, the side fixed mold includes a middle arc plate that is initially attached to the outer circumferential surface of the core fixed mold 106. The upper end of the middle arc plate extends to the direction away from the core fixed mold 106. The lower end of the middle arc plate extends to the direction away from the core fixed mold 106. The lower arc plate, initially, the outer arc surface of the middle arc plate is attached to the core fixed mold 106. The inner ring surface of the upper fixed mold 105 is fitted, the upper end surface of the middle arc plate is lower than the upper end surface of the upper fixed mold 105, the upper end surface of the middle arc plate is flush with the upper end surface of the core fixed mold 106, the upper arc plate is located in the annular groove, and the lower end surface of the upper arc plate is higher than the lower groove wall of the annular groove. In this way, several side fixed molds cooperate with the upper fixed mold 105 to form an area that matches the undercut structure of the workpiece, and this area cooperates with the core fixed mold 106 to form a fixed mold cavity that matches the shape of the workpiece.

[0042] In addition, in order to facilitate the description of the demolding process, several side fixed molds are divided into two types, namely side fixed mold one 107 and side fixed mold two 108, which are arranged in an alternating manner, that is, side fixed mold one 107 is located between two adjacent side fixed molds two 108, and side fixed mold two 108 is located between two adjacent side fixed molds one 107.

[0043] Reference Figure 8 and Fig. 9 The outer sleeve of the core fixed mold 106 is provided with a collar 115 , and the collar 115 is fixedly connected to the ring column 102 .

[0044] A lower bracket 111 extends from the bottom of the side fixed mold 108, and a pin hole 112 is provided on the lower bracket 111. The pin hole 112 includes a vertical section and an inclined section. The inclined section is located below the vertical section. The distance between the inclined section and the core fixed mold 106 decreases from bottom to top. A lug 1061 is provided on the outer cylindrical surface of the core fixed mold 106, and a convex pin 1062 is provided on the convex pin 1062. The convex pin 1062 and the pin hole 112 form a sliding connection.

[0045] A guide rod 113 and a guide rod 2 114 are extended downward from the bottom of the lower bracket 111, and a guide rod 4 117 is radially slidably installed in the ring column 102. The lower ends of the guide rod 113 and the guide rod 2 114 are provided with limit rings after passing through the guide rod 4 117. The ring 115 is also provided with an avoidance hole 1152 for avoiding the guide rod 2 114. The outer part of the guide rod 113 is provided with a spring 118 located between the lower bracket 111 and the guide rod 4 117, and the outer part of the guide rod 2 114 is provided with a spring 2 119 located between the ring 115 and the guide rod 4 117.

[0046] In addition, since guide rod 1 113 and guide rod 2 114 pass through guide rod 4 117, and guide rod 4 117 forms a radial sliding fit with the ring column 102, guide rod 4 117 also limits side fixed mold 2 108 to move only radially along the ring column 102, that is, it can only move radially along the core fixed mold 106.

[0047] Reference Figure 8 and Fig. 9 A lower bracket 109 extends from the bottom of the side fixed mold 107, and a pin hole 110 is provided on the lower bracket 109. The distance between the pin hole 110 and the core fixed mold 106 decreases from bottom to top. A convex pin 1151 extends from the ring 115, and the convex pin 1151 forms a sliding connection with the pin hole 110.

[0048] In addition, a guide rod 3 116 is radially slidably installed on the ring column 102 , and the guide rod 3 116 is connected to the side fixed mold 1 107 , thereby playing a guiding role for the side fixed mold 107 .

[0049] Reference Figure 5 A hydraulic rod 103 is provided in the lower die base 101 , and the hydraulic rod 103 is connected to the core fixed die 106 through a connecting bracket 104 .

[0050] After the workpiece is injection molded, the process of the workpiece leaving the lower mold 100 is specifically as follows:

[0051] The core fixed mold 106 is driven downward by the hydraulic rod 103. During the downward movement, at the beginning, the convex pin 1062 moves in the vertical section of the pin hole 2 112, and the side fixed mold 107 and the side fixed mold 2 108 are stationary.

[0052] Then, the convex pin 1062 moves in the inclined section of the pin hole 112, so that the lower bracket 111 and the side fixed mold 108 move close to the core fixed mold 106, and the spring 118 is compressed. It should be noted that the previous downward movement of the core fixed mold 106 makes the upper end surface lower than the side fixed mold 108, so the side fixed mold 108 can move close to the core fixed mold 106;

[0053] Then, when the convex pin 1062 moves inverted in the pin hole 112, the core fixed mold 106 moves downward and directly pulls the lower bracket 111 and the side fixed mold 108 downward together. The downward movement of the side fixed mold 108 is used to make room for the subsequent movement of the side fixed mold 107.

[0054] Then, when the lower bracket 111 contacts the collar 115, the collar 115 moves downward together with the lower bracket 111, and the side fixed mold 107 moves closer to the core fixed mold 106 through the cooperation between the convex pin 1151 and the pin hole 110, and the spring 119 is compressed.

[0055] When the convex pin 1151 moves inverted in the pin hole 110, the side fixed mold 107 is separated from the undercut structure of the workpiece. At this time, the workpiece is not restricted by the lower mold 100, that is, the demolding between the workpiece and the lower mold 100 is completed.

[0056] Upper mold 200:

[0057] Reference Fig.11 The upper mold 200 includes an upper mold base 201 , a movable mold 202 disposed on the lower end surface of the upper mold base 201 , and an injection nozzle 203 disposed on the movable mold 202 .

[0058] Working principle of embodiment 1:

[0059] The upper mold 200 moves downward and is molded with the lower mold 100. After the molds are molded, the molten plastic is injected into the mold cavity through the injection nozzle 203. After a preset time, the component is cooled and formed.

[0060] Then, the core fixed mold 106 is driven downward by the hydraulic rod 103 to realize demoulding between the workpiece and the lower mold 100. This process has been described in detail above and will not be repeated here.

[0061] Then, the upper mold 200 is moved upward, and the workpiece is ejected from the upper mold 200 by the existing technology, and the component is removed, and the injection molding is completed.

[0062] Embodiment 2

[0063] In the first embodiment, when the workpiece is demoulded, it is directly separated from the core fixed mold 106, the side fixed mold, the upper fixed mold 105 and the movable mold 202 by relative movement. In order to make the demoulding process smoother and the workpiece surface less susceptible to damage, the second embodiment is proposed.

[0064] Reference Fig.10 A convex tube 120 is extended from the lower closed end of the core fixed mold 106 , and the end of the convex tube 120 is connected to an air compressor, an air pump, or a blower, etc., and a piston 121 is sleeved in the convex tube 120 .

[0065] The lower closed end of the core fixed mold 106 is provided with a lower auxiliary hole connected to the convex tube 120, the lower auxiliary hole includes an upper hole section and a lower hole section, a lower auxiliary component 122 is installed in the lower auxiliary hole, the lower auxiliary component 122 includes a lower nozzle located in the upper hole section, a lower nozzle pipe extends from the bottom of the lower nozzle, the end of the lower nozzle pipe passes through the lower hole section and the piston 121, the outer sleeve of the lower nozzle pipe is provided with a spring 123 located between the piston 121 and the lower closed end of the core fixed mold 106, initially, the lower nozzle fills the upper hole section, and the nozzle hole on the lower nozzle is arranged on the side of the lower nozzle, During demolding, air is injected into the convex tube 120 through an air compressor. At the beginning, since the spray hole is blocked, the piston 121 moves upward and pushes the workpiece upward through the lower nozzle, so that there is a gap between the component and the bottom of the core fixed mold 106. After that, the air no longer pushes the piston 121 to move, but enters the gap through the lower nozzle, the lower nozzle and the spray hole, and penetrates into the contact between the workpiece and the lower mold 100, so that the adhesion between the workpiece and the lower mold 100 is reduced, thereby facilitating the subsequent separation of the workpiece from the lower mold 100.

[0066] Reference Fig.11 The lower end surface of the movable mold 202 is provided with a mounting groove, and a through hole is opened through the bottom of the mounting groove. The upper auxiliary component 204 arranged on the movable mold 202 includes an upper nozzle located in the mounting groove, and the spray hole on the upper nozzle is also arranged on the side. An upper nozzle pipe extends from the top of the upper nozzle, and a fixing ring is provided after the upper nozzle pipe passes through the through hole, so that the upper nozzle extends out of the mounting groove initially.

[0067] A sliding hole is provided on the upper die base 201, and a push rod 206 is sleeved in the sliding hole. The upper and lower ends of the push rod 206 both extend out of the sliding hole. The upper end of the push rod 206 also passes through a support arranged on the upper end surface of the upper die base 201. A connecting plate 208 extends from the outside of the push rod 206. Initially, the connecting plate 208 contacts the upper end surface of the upper die base 201. The outside of the push rod 206 is sleeved with a spring five 207 located between the connecting plate 208 and the support. The upper end of the upper nozzle passes through the connecting plate 208 and is connected to the air compressor. A circular ring is provided at the upper end of the upper nozzle. The outside of the upper nozzle is sleeved with a spring four 205 located between the circular ring and the connecting plate 208. The shaft shoulder of the upper nozzle contacts the lower end surface of the connecting plate 208.

[0068] When the mold is closed, the push rod 206 will first contact the lower mold base 101, and the spring five 207 will be compressed, and the upper auxiliary component 204 will move upward through the connecting plate 208, so that the upper nozzle is retracted into the installation groove, and the upper nozzle just fills the installation groove, which does not affect the subsequent injection molding process. After the molding is completed, when the workpiece is demoulded from the movable mold 202, at the beginning, the upper mold 200 is moved upward first, and the spring five 207 releases the elastic force to move the upper auxiliary component 204 downward. The elastic force is indirectly applied to the end face of the upper open end of the workpiece through the upper nozzle, so that a gap is formed. Then, air will enter the gap and penetrate into the contact between the workpiece and the upper mold 200, so that the adhesion between the workpiece and the upper mold 200 is reduced, thereby facilitating the subsequent separation of the workpiece from the upper mold 200.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An easy-to-release injection mold assembly, comprising a lower mold (100) and an upper mold (200), characterized in that: The lower mold (100) comprises a lower mold base (101), a ring column (102) and a fixed mold component are installed in the lower mold base (101), the fixed mold component comprises a core fixed mold (106) coaxially located in the ring column (102), an upper fixed mold (105) coaxially arranged at the upper open end of the ring column (102) and in an annular shape, and a side mold group located between the core fixed mold (106) and the upper fixed mold (105), the upper end of the core fixed mold (106) is open and the lower end is closed, the inner ring surface of the upper fixed mold (105) is provided with an annular groove and the annular groove penetrates to the upper end surface of the upper fixed mold (105), and the side mold group comprises a plurality of side molds distributed in an array along the circumferential direction of the core fixed mold (106). side fixed molds, two adjacent side fixed molds are attached to each other and form a sliding fit along the radial direction of the core fixed mold (106), the side fixed mold includes a middle arc plate attached to the outer circular surface of the core fixed mold (106), the upper end of the middle arc plate extends in a direction away from the core fixed mold (106) with an upper arc plate, and the lower end of the middle arc plate extends in a direction away from the core fixed mold (106) with a lower arc plate, initially, the outer arc surface of the middle arc plate is attached to the inner annular surface of the upper fixed mold (105), the upper end surface of the middle arc plate is lower than the upper end surface of the upper fixed mold (105), the upper end surface of the middle arc plate is flush with the upper end surface of the core fixed mold (106), the upper arc plate is located in the annular groove, and the lower end surface of the upper arc plate is higher than the lower groove wall of the annular groove; The plurality of side fixed molds are divided into two types, namely, side fixed mold one (107) and side fixed mold two (108), the side fixed mold one (107) is located between two adjacent side fixed molds two (108), and the side fixed mold two (108) is located between two adjacent side fixed molds one (107), and the outer sleeve of the core fixed mold (106) is provided with a sleeve ring (115), and the sleeve ring (115) is fixedly connected to the ring column (102); A lower bracket 2 (111) extends from the bottom of the second side fixed mold (108), and a pin hole 2 (112) is arranged on the second lower bracket (111). The pin hole 2 (112) includes a vertical section and an inclined section, and the inclined section is located below the vertical section. The distance between the inclined section and the core fixed mold (106) decreases from bottom to top. A lug (1061) is arranged on the outer circumferential surface of the core fixed mold (106), and a convex pin 1 (1062) is arranged on the convex lug (1061). The convex pin 1 (1062) and the pin hole 2 (112) form a sliding connection. A guide rod 1 (113) and a guide rod 2 (114) extend downward from the bottom of the lower bracket 2 (111), a guide rod 4 (117) is radially installed in the ring column (102), and the lower ends of the guide rod 1 (113) and the guide rod 2 (114) are provided with limit rings after passing through the guide rod 4 (117), and the collar (115) is also provided with an avoidance hole (1152) for avoiding the guide rod 2 (114), the outer part of the guide rod 1 (113) is sleeved with a spring 1 (118) located between the lower bracket 2 (111) and the guide rod 4 (117), and the outer part of the guide rod 2 (114) is sleeved with a spring 2 (119) located between the collar (115) and the guide rod 4 (117); A lower bracket 1 (109) extends from the bottom of the side fixed mold 1 (107), and a pin hole 1 (110) is provided on the lower bracket 1 (109). The distance between the pin hole 1 (110) and the core fixed mold (106) decreases from bottom to top. A convex pin 2 (1151) extends from the collar (115), and the convex pin 2 (1151) and the pin hole 1 (110) are slidably connected.

2. The easy-to-release injection mold assembly according to claim 1, characterized in that: The guide rod 4 (117) and the ring column (102) form a sliding fit.

3. The easy-to-release injection mold assembly according to claim 1, characterized in that: A guide rod 3 (116) is radially slidably mounted on the ring column (102), and the guide rod 3 (116) is connected to the side fixed mold 1 (107).

4. The easy-to-release injection mold assembly according to claim 1, characterized in that: A hydraulic rod (103) is arranged in the lower die seat (101), and the hydraulic rod (103) is connected to the core fixed die (106) via a connecting bracket (104).

5. An easy-to-release injection mold assembly according to claim 1 or 4, characterized in that: The upper mold (200) comprises an upper mold base (201), a movable mold (202) arranged on the lower end surface of the upper mold base (201), and an injection nozzle (203) arranged on the movable mold (202).

6. The easy-to-release injection mold assembly according to claim 5, characterized in that: A convex tube (120) extends from the lower closed end of the core fixed mold (106), the end of the convex tube (120) is connected to an air compressor, and a piston (121) is sleeved inside the convex tube (120); The lower closed end of the core fixed mold (106) is provided with a lower auxiliary hole connected to the convex tube (120), the lower auxiliary hole includes an upper hole section and a lower hole section, a lower nozzle is installed in the upper hole section, a lower nozzle pipe extends from the bottom of the lower nozzle, the end of the lower nozzle pipe passes through the lower hole section and the piston (121), the outer sleeve of the lower nozzle pipe is provided with a spring three (123) located between the piston (121) and the lower closed end of the core fixed mold (106), initially, the lower nozzle fills the upper hole section, and the nozzle hole on the lower nozzle is arranged on the side of the lower nozzle.

Images