A secondary ejection mechanism for ejecting a barrel-type injection mold by inserting a needle and opening the mold

Abstract

The utility model discloses a secondary ejection mechanism for ejecting a barrel-type injection mold when a pin is inserted and the mold is opened, and relates to the technical field of barrel-type injection molds, including a lower mold base, two mold feet are fixedly installed on the front and rear parts of the upper surface of the lower mold base, a B plate is fixedly installed on the upper surface of the mold feet, an A plate is overlapped on the upper surface of the B plate, and an upper mold base is fixedly installed on the top of the A plate. The secondary ejection mechanism for ejecting a barrel-type injection mold when a pin is inserted and the mold is opened described in the utility model uses the function of a second limit block to limit the positions of two sliders and a side core slider on an outer core ring, so as to avoid the problem that the two sliders and the side core slider fall off from the outer core ring when the outer core ring and the B plate are separated, thereby affecting the injection molding effect of the barrel-type injection molded parts, and uses the function of a second bevel angle to push the elastic pin and the side core slider on the slider when the mold is closed, so as to perform side core pulling on the barrel-type injection molded parts.

Description

Technical Field

[0001] The utility model relates to the technical field of barrel injection molds, in particular to a secondary ejection mechanism for ejecting a barrel injection mold when a pin is inserted and the mold is opened. Background Art

[0002] Injection molded products are common daily necessities. Due to their advantages of light weight, high strength, good durability, and strong assemblability, they are widely used in household products, medical equipment, building materials, sports equipment, and other fields. In the production process of injection molded products, the molten plastic material is usually stirred evenly by a screw extruder at a certain temperature, and then injected into the injection mold. The plastic material is formed in the cavity of the injection mold, and after cooling and solidification, the molded injection molded product is obtained, and then the injection molded product is pushed out of the injection mold by the ejector;

[0003] Secondary ejection can make the ejection process smoother. For some products with large ejection stroke requirements, secondary ejection can reduce the force applied by the ejector during ejection and avoid defects on the product during ejection.

[0004] The existing technology has the following problems:

[0005] The existing secondary ejection mechanism for ejecting the barrel-type injection mold by inserting a pin and opening the mold is inconvenient for the barrel-type injection molded parts to be linked to the side core pulling when in use, and it is also inconvenient for the upper ejector plate and the lower ejector plate to be linked to and separated, thereby reducing the demoulding efficiency of the barrel-type injection molded parts. Utility Model Content

[0006] The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold when a needle is inserted and the mold is opened, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A secondary ejection mechanism for ejecting a barrel injection mold by inserting a needle, opening a mold, and comprising a lower mold base, two mold feet are fixedly installed on the front and rear parts of the upper surface of the lower mold base, a B plate is fixedly installed on the upper surface of the mold feet, an A plate is overlapped on the upper surface of the B plate, an upper mold base is fixedly installed on the top of the A plate, a gate sleeve assembly penetrating the upper mold base is fixedly installed in the middle of the upper mold base, a lower ejector plate is overlapped in the middle of the upper surface of the lower mold base, an upper ejector plate is movably installed on the upper surface of the lower ejector plate, an ejector rod assembly is fixedly installed in the middle of the upper ejector plate, a waterway system is arranged on the upper mold base, the A plate, the B plate and the ejector rod assembly, and a waterway system is arranged on the left side of the upper mold base. Rubber legs are fixedly installed at the front and rear positions and on the left sides of the two mold feet, barrel-type injection molded parts are arranged in the inner cavities of the A plate and the B plate, a glue injection port is fixedly installed at the middle position of the bottom of the upper mold base, and the glue injection port is located directly below the gate sleeve assembly, a top block is fixedly installed on the top of the ejector assembly, and the top block is located at the top of the inner cavity of the barrel-type injection molded parts, hook mechanisms are fixedly installed in the middle of the left and right sides of the lower mold base, a side core pulling mechanism is fixedly installed at the bottom of the inner cavity of the B plate, and the side core pulling mechanism is located directly below the barrel-type injection molded parts, guide assemblies are fixedly installed at the four corners of the B plate, and the outer walls of the guide assemblies are movably socketed with the four corners of the upper mold base and the A plate respectively.

[0009] Preferably, the hook mechanism includes a U-shaped protrusion, the bottom of the opposite surface of the U-shaped protrusion is fixedly installed with the middle of the left and right side surfaces of the lower mold base, and two clamping blocks are fixedly installed with the middle of the left and right side surfaces of the lower ejector plate, and the clamping block is located in the middle position of the U-shaped protrusion, and the tops of the opposite surfaces of the two clamping blocks are clamped with spring blocks, and the middle position of the left and right parts of the lower ejector plate is fixedly installed with a limiting column.

[0010] Preferably, the front and rear positions of the elastic blocks away from the top of a side surface and the tops of the front and rear parts of the two U-shaped protrusions facing each other are both provided with an oblique angle.

[0011] Preferably, a limiting groove penetrating the spring block is provided in the middle of the upper surface of the spring block, and the top of the limiting column extends into the inner cavity of the limiting groove. The front and rear positions of the spring block are slidably connected with two pressure plates, and the bottom of the two pressure plates on one side away from each other are fixedly installed on the front and rear positions of the groove on one side of the upper ejector plate close to the U-shaped protrusion.

[0012] Preferably, the spring block is provided with two spring grooves at the front and rear positions away from one side of the U-shaped protrusion, the inner wall of the spring groove is movably sleeved with a spring 1, and one end of the spring 1 away from the spring block overlaps with the position of the upper ejector plate close to the spring block.

[0013] Preferably, the side core pulling mechanism includes a push rod and an outer core ring, the top position of the outer wall of the push rod is movably sleeved with a wear-resistant sleeve, the outer wall of the wear-resistant sleeve is fixedly sleeved with the bottom of the B plate, the bottom of the outer wall of the push rod passes through the upper ejector plate and the upper surface of the lower ejector plate is fixedly installed, the top of the push rod is threadedly connected with a fixing bolt that passes through the outer core ring, the inner wall of the outer core ring is overlapped with an inner core ring, the upper surface of the push rod is fixedly installed with the bottom of the A plate, the left part of the outer core ring is slidably connected with a side core slider, and the front and rear positions of the outer core ring Both are slidably connected with sliders, the bottom of the side core slider is movably sleeved with two springs three near a side of the barrel-type injection molded part, one end of the spring three near the barrel-type injection molded part is overlapped with the inner core ring, and elastic pins are fixedly installed on the tops of the opposite surfaces of the two sliders, the right end of the side core slider is plugged into the left side of the bottom of the outer wall of the barrel-type injection molded part, the outer walls of the opposite surfaces of the two elastic pins are plugged into the front and rear positions of the bottom of the outer wall of the barrel-type injection molded part, the bottoms of the opposite surfaces of the two sliders are movably sleeved with springs two, and the opposite ends of the springs two are overlapped with the inner core ring.

[0014] Preferably, the top surface on the left side of the side core slider and the top surface on the side away from the two sliders are both slidably connected to the limiting block 2, and the two ends of the two limiting blocks 2 are fixedly installed on the front, back and left sides of the upper surface of the outer core ring.

[0015] Preferably, the side core slider and the two sliders are provided with bevel angles 2 at a side surface away from the barrel-type injection molded part and at the bottom edge of the inner cavity of the B plate.

[0016] Preferably, two connecting plates are detachably mounted on the left front side and the right rear side of the connection between the A plate and the B plate.

[0017] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0018] 1. The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold by inserting a needle and opening the mold. The spring block slides on the U-shaped protrusion to control the clamping connection between the spring block and the clamping block, so as to achieve the purpose of secondary ejection of the barrel-type injection molded part by inserting a needle and opening the mold.

[0019] 2. The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold when a needle is inserted and the mold is opened. By utilizing the effect of angle 1, a sliding connection can be achieved between the spring block and the U-shaped protrusion, and the spring block can be pushed to the side away from the U-shaped protrusion, so that the card connection between the spring block and the card block can be controlled.

[0020] 3. The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold when the needle is inserted and the mold is opened. The mechanism utilizes the sliding connection between the pressure plate and the spring block and the cooperation between the limit groove and the limit column to limit the movement of the spring block and avoid the problem of separation between the spring block and the upper ejector plate or excessive movement.

[0021] 4. The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold when the needle is inserted and the mold is opened. The position of the two sliders and the side core slider on the outer core ring is limited by the function of the limit block 2, so as to avoid the problem that the two sliders and the side core slider fall off from the outer core ring when the outer core ring and the B plate are separated, thereby affecting the injection molding effect of the barrel-type injection molded parts.

[0022] 5. The utility model provides a secondary ejection mechanism for ejecting a needle during mold opening of a barrel-type injection mold. The position of two sliders and a side core slider on the outer core ring is limited by the function of the limit block 2, so as to avoid the problem that the two sliders and the side core slider fall off from the outer core ring when the outer core ring and the B plate are separated, thereby affecting the injection molding effect of the barrel-type injection molded parts. The function of the bevel angle 2 is utilized to push the elastic needle and the side core slider on the slider when the mold is closed, so as to perform side core pulling of the barrel-type injection molded parts.

[0023] 6. The utility model provides a secondary ejection mechanism for ejecting a barrel-type injection mold when the needle is inserted and the mold is opened. The connection between the A plate and the B plate is fixed by the connecting plate so that they can be separated when the injection mold is moved, thereby affecting the transportation effect of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 The cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 3 The cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 4 It is a cross-sectional structural schematic diagram of the hook mechanism of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the bullet block of the utility model;

[0029] Figure 6 This is a schematic diagram of the internal structure of the A plate and the B plate of the utility model;

[0030] Figure 7 This is a structural schematic diagram of the side core pulling mechanism of the utility model on the B plate;

[0031] Figure 8 It is a cross-sectional structural schematic diagram of a part of the structure of the side core pulling mechanism of the utility model;

[0032] Fig. 9 This is a schematic diagram of the pin-embedding mold opening position structure of the barrel-type injection molded part of the utility model.

[0033] In the figure: 1. Gate bushing assembly; 2. Upper die base; 3. Plate A; 4. Plate B; 5. Die foot; 6. Lower die base; 7. Upper ejector plate; 8. Lower ejector plate; 9. Water system; 10. Rubber leg; 11. Guide assembly; 12. Barrel injection molding parts;

[0034] 13. hook mechanism; 131. U-shaped protrusion; 132. clamping block; 133. spring block; 134. limiting groove; 135. limiting column; 136. pressing plate; 137. spring groove; 138. spring 1;

[0035] 14. Ejector rod assembly;

[0036] 15. Side core pulling mechanism; 151. Push rod; 152. Wear-resistant sleeve; 153. Fixing bolt; 154. Outer core ring; 155. Inner core ring; 156. Slider; 157. Spring 2; 158. Spring pin; 159. Limit block 2; 1510. Side core slider; 1511. Spring 3;

[0037] 16. Connecting plate; 17. Glue injection port; 18. Top block. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0039] like Figure 1-Figure 9As shown, a secondary ejection mechanism for ejecting a barrel-type injection mold by inserting a needle and opening the mold comprises a lower mold base 6, two mold feet 5 are fixedly installed on the front and rear parts of the upper surface of the lower mold base 6, a B plate 4 is fixedly installed on the upper surface of the mold foot 5, an A plate 3 is overlapped on the upper surface of the B plate 4, an upper mold base 2 is fixedly installed on the top of the A plate 3, a gate sleeve assembly 1 that penetrates the upper mold base 2 is fixedly installed on the middle part of the upper mold base 2, a lower ejector plate 8 is overlapped on the middle part of the upper surface of the lower mold base 6, an upper ejector plate 7 is movably installed on the upper surface of the lower ejector plate 8, an ejector rod assembly 14 is fixedly installed in the middle part of the upper ejector plate 7, a waterway system 9 is arranged on the upper mold base 2, and the front and rear positions of the left side of the upper mold base 2 and the two A rubber leg 10 is fixedly installed on the left side of the mold foot 5, a barrel-type injection molded part 12 is arranged in the inner cavity of the A plate 3 and the B plate 4, a glue injection port 17 is fixedly installed in the middle position of the bottom of the upper mold base 2, and the glue injection port 17 is located directly below the gate sleeve assembly 1, a top block 18 is fixedly installed on the top of the ejector assembly 14, and the top block 18 is located at the top of the inner cavity of the barrel-type injection molded part 12, a hook mechanism 13 is fixedly installed in the middle of the left and right sides of the lower mold base 6, a side core pulling mechanism 15 is fixedly installed at the bottom of the inner cavity of the B plate 4, and the side core pulling mechanism 15 is located directly below the barrel-type injection molded part 12, and a guide assembly 11 is fixedly installed at the four corners of the B plate 4, and the outer wall of the guide assembly 11 is movably connected with the four corners of the upper mold base 2 and the A plate 3 respectively.

[0040] The sprue bushing assembly 1 is used to facilitate the injection of molten plastic particles from the sprue bushing assembly 1 into the inner cavity between the A plate 3 and the B plate 4 through the injection molding machine to form the shape of a barrel-type injection molded part 12;

[0041] The water system 9 is used to cool down the injection mold.

[0042] By utilizing the four rubber legs 10, the vehicle can be in contact with the ground or the transport device during transportation;

[0043] By utilizing the function of the ejector assembly 14, the barrel-type injection molded part 12 is pushed out from the inner cavity between the A plate 3 and the B plate 4 to start the unloading.

[0044] First, the mold is installed at an appropriate position on the injection molding machine, and then the molten plastic particles are passed through the injection molding machine, and the molten plastic is injected into the cavity between the A plate 3 and the B plate 4 from the position of the gate sleeve assembly 1. At the same time, water is injected from the water system 9 to cool the injection mold so that the barrel-type injection molded part 12 formed by injection molding can be quickly cooled. After the barrel-type injection molded part 12 is cooled, the lower mold base 6 is pulled by the injection molding machine to separate the A plate 3 and the B plate 4, and then the barrel-type injection molded part 12 can be The outer wall of the barrel-type injection molded part 12 is demolded, and then the upper ejector plate 7 and the lower ejector plate 8 are pushed to separate the side core pulling mechanism 15 from the inner cavity of the B plate 4, so that the connecting part between the B plate 4 and the inner wall of the barrel-type injection molded part 12 and the connecting part between the side core on the side core pulling mechanism 15 and the barrel-type injection molded part 12 can be separated, and then the upper ejector plate 7 is pushed again to separate the release distribution between the barrel-type injection molded part 12 and the side core pulling mechanism 15, thereby achieving the purpose of secondary ejection of the pin inserting mold popping out.

[0045] like Figure 4 and Figure 5 As shown, the hook mechanism 13 includes a U-shaped protrusion 131, the bottom of the opposite surface of the U-shaped protrusion 131 is fixedly installed with the middle of the left and right side surfaces of the lower mold base 6, and two clamping blocks 132 are fixedly installed with the middle of the left and right side surfaces of the lower ejector plate 8. The clamping block 132 is located in the middle position of the U-shaped protrusion 131, and the tops of the opposite surfaces of the two clamping blocks 132 are clamped with spring blocks 133, and the middle position of the left and right parts of the lower ejector plate 8 is fixedly installed with a limiting column 135.

[0046] By sliding the spring block 133 on the U-shaped protrusion 131 , the engagement between the spring block 133 and the clamping block 132 is controlled, so as to achieve the purpose of secondary ejection of the barrel-type injection molded part 12 by inserting a needle and opening the mold.

[0047] like Figure 4 and Figure 5 As shown, the front and rear positions of the elastic blocks 133 away from the top of the side surface and the tops of the two U-shaped protrusions 131 facing the front and rear surfaces are both provided with an oblique angle.

[0048] By utilizing the effect of the bevel angle 1, a sliding connection can be achieved between the spring block 133 and the U-shaped protrusion 131 , and the spring block 133 can be pushed toward a side away from the U-shaped protrusion 131 , so that the engagement between the spring block 133 and the clamping block 132 can be controlled.

[0049] like Figure 4 and Figure 5As shown, a limiting groove 134 penetrating the spring block 133 is provided in the middle of the upper surface of the spring block 133, and the top of the limiting column 135 extends into the inner cavity of the limiting groove 134. The front and rear positions of the spring block 133 are slidably connected to two pressure plates 136, and the bottom of the two pressure plates 136 are fixedly installed at the front and rear positions of the groove on the side of the upper ejector pin plate 7 close to the U-shaped protrusion 131 away from each other.

[0050] The sliding connection between the pressure plate 136 and the spring block 133 and the cooperation between the limiting groove 134 and the limiting column 135 are utilized to limit the movement of the spring block 133, thereby avoiding the problem of separation or excessive movement between the spring block 133 and the upper ejector plate 7.

[0051] like Figure 4 and Figure 5 As shown, two spring grooves 137 are provided at the front and rear positions of the spring block 133 away from one side of the U-shaped protrusion 131, and a spring 138 is movably sleeved on the inner wall of the spring groove 137. One end of the spring 138 away from the spring block 133 overlaps with the position of the upper ejector plate 7 close to the spring block 133.

[0052] The spring 138 is used to push the spring block 133, so that the clamping block 132 clamps the spring block 133, thereby connecting the upper ejector plate 7 and the lower ejector plate 8;

[0053] like Figure 6 and Fig. 9 As shown, the side core pulling mechanism 15 includes a push rod 151 and an outer core ring 154, the top position of the outer wall of the push rod 151 is movably sleeved with a wear-resistant sleeve 152, the outer wall of the wear-resistant sleeve 152 is fixedly sleeved with the bottom of the B plate 4, the bottom of the outer wall of the push rod 151 passes through the upper ejector plate 7 and the upper surface of the lower ejector plate 8 for fixed installation, the top of the push rod 151 is threadedly connected with a fixing bolt 153 passing through the outer core ring 154, the inner wall of the outer core ring 154 is overlapped with an inner core ring 155, the upper surface of the push rod 151 is fixedly installed with the bottom of the A plate 3, the left part of the outer core ring 154 is slidably connected with a side core slider 1510, and the front and rear positions of the outer core ring 154 are both slidable A slider 156 is movably connected to the side core slider 1510, and two spring three 1511 are movably sleeved on the bottom of the side core slider 1510 near a side of the barrel-like injection molding 12. One end of the spring three 1511 near the barrel-like injection molding 12 overlaps the inner core ring 155. A spring pin 158 is fixedly installed on the top of the opposite surfaces of the two sliders 156. The right end of the side core slider 1510 is plugged into the left side of the bottom of the outer wall of the barrel-like injection molding 12. The outer wall of the opposite surfaces of the two spring pins 158 is plugged into the front and rear positions of the bottom of the outer wall of the barrel-like injection molding 12. A spring two 157 is movably sleeved on the bottom of the opposite surfaces of the two sliders 156, and the opposite end of the spring two 157 overlaps the inner core ring 155.

[0054] By utilizing the fixing bolt 153, it is convenient to fix the outer core ring 154 and the ejector rod 151, and the outer core ring 154 can be separated from the inner cavity of the B plate 4 by pushing the upper ejector plate 7 and the lower ejector plate 8. At the same time, the slider 156 and the side core slider 1510 are respectively moved to the side away from the barrel-type injection molding part 12 under the action of the spring two 157 and the spring three 1511, so that the side core slider 1510 and the two spring pins 158 can be cored out at the position where they are inserted into the barrel-type injection molding part 12.

[0055] like Figure 6 and Fig. 9 As shown, the top surface on the left side of the side core slider 1510 and the top surface on the side away from the two sliders 156 are both slidably connected to the limiting block 159, and the two ends of the two limiting blocks 159 are fixedly installed on the front, back and left sides of the upper surface of the outer core ring 154.

[0056] By utilizing the function of the limit block 159, the positions of the two sliders 156 and the side core slider 1510 on the outer core ring 154 are limited to avoid the problem that the two sliders 156 and the side core slider 1510 fall off the outer core ring 154 when the outer core ring 154 and the B plate 4 are separated, thereby affecting the injection molding effect of the barrel-type injection molded part 12.

[0057] like Figure 6 and Fig. 9 As shown, the side core slider 1510 and the two sliders 156 are provided with bevel angles 2 at the side surface away from the barrel-type injection molded part 12 and the bottom edge of the inner cavity of the B plate 4.

[0058] The effect of the second bevel angle is utilized so that the spring pin 158 on the slider 156 and the side core slider 1510 can be pushed when the mold is closed, thereby performing side core pulling on the barrel-type injection molded part 12 .

[0059] like Figure 1 As shown, two connecting plates 16 are detachably mounted on the left front side and the right rear side of the connection between the A plate 3 and the B plate 4 .

[0060] The connection plate 16 is used to fix the connection between the A plate 3 and the B plate 4 so that they can be separated when the injection mold is moved, thereby affecting the transportation effect of the injection mold.

[0061] The working principle of the utility model is as follows: first, the mold is installed at an appropriate position on the injection molding machine, and then the molten plastic particles are passed through the injection molding machine, and the molten plastic is injected into the cavity between the A plate 3 and the B plate 4 from the position of the gate sleeve assembly 1, and water is injected from the water system 9 to cool the injection mold so that the barrel-type injection molded part 12 formed by injection molding can be quickly cooled. When the barrel-type injection molded part 12 is cooled, the lower mold base 6 is pulled by the injection molding machine to separate the A plate 3 and the B plate 4, so that the outer wall of the barrel-type injection molded part 12 and the connection between the A plate 3 and the inner core ring 155 can be demolded, and then the upper ejector plate 7 and the lower ejector plate 8 are pushed to separate the side core pulling mechanism 15 from the inner cavity of the B plate 4, so that the connection between the B plate 4 and the inner wall of the barrel-type injection molded part 12 can be separated, and the sliding The block 156 and the side core slider 1510 are respectively moved to the side away from the barrel-type injection molded part 12 under the action of the second spring 157 and the third spring 1511, so that the side core slider 1510 and the two spring pins 158 can be pulled out at the position where the barrel-type injection molded part 12 is inserted, and then the upper ejector plate 7 is pushed again. By utilizing the effect of the bevel angle 1, the sliding connection between the elastic block 133 and the U-shaped protrusion 131 can be achieved. The elastic block 133 can be pushed to the side away from the U-shaped protrusion 131, so that the card connection between the elastic block 133 and the card block 132 can be controlled, and the upper ejector plate 7 and the lower ejector plate 8 can be separated, so that the bottom of the outer wall of the barrel-type injection molded part 12 and the connection between the inner wall of the outer core ring 154 can be separated, and the barrel-type injection molded part 12 can be completely demolded, so as to achieve the purpose of secondary ejection of the pin inserting mold opening.

[0062] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A secondary ejection mechanism for ejecting a barrel-type injection mold after inserting a needle and opening the mold, comprising a lower mold base (6), characterized in that: Two mold feet (5) are fixedly mounted on the front and rear parts of the upper surface of the lower mold base (6); a B plate (4) is fixedly mounted on the upper surface of the mold foot (5); an A plate (3) is overlapped on the upper surface of the B plate (4); an upper mold base (2) is fixedly mounted on the top of the A plate (3); a gate sleeve assembly (1) that passes through the upper mold base (2) is fixedly mounted in the middle of the upper mold base (2); a lower ejector plate (8) is overlapped on the middle of the upper surface of the lower mold base (6); an upper ejector plate (7) is movably mounted on the upper surface of the lower ejector plate (8); an ejector rod assembly (14) is fixedly mounted in the middle of the upper ejector plate (7); a waterway system (9) is provided on the upper mold base (2), the A plate (3), the B plate (4) and the ejector rod assembly (14); rubber components are fixedly mounted on the front and rear positions of the left side of the upper mold base (2) and the left sides of the two mold feet (5); The rubber legs (10) are provided in the inner cavities of the A plate (3) and the B plate (4), a barrel-type injection molded part (12) is arranged, a glue injection port (17) is fixedly installed at the middle position of the bottom of the upper mold base (2), and the glue injection port (17) is located directly below the gate sleeve assembly (1), a top block (18) is fixedly installed at the top of the ejector assembly (14), and the top block (18) is located at the top of the inner cavity of the barrel-type injection molded part (12), a hook mechanism (13) is fixedly installed at the middle of the left and right sides of the lower mold base (6), a side core pulling mechanism (15) is fixedly installed at the bottom of the inner cavity of the B plate (4), and the side core pulling mechanism (15) is located directly below the barrel-type injection molded part (12), and the four corners of the B plate (4) are fixedly installed with guide assemblies (11), and the outer walls of the guide assemblies (11) are movably sleeved with the four corners of the upper mold base (2) and the A plate (3) respectively.

2. According to claim 1, a secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold is characterized by: The hook mechanism (13) comprises a U-shaped protrusion (131), the bottom of the opposite surface of the U-shaped protrusion (131) is fixedly mounted to the middle of the left and right side surfaces of the lower die seat (6), two clamping blocks (132) are fixedly mounted to the middle of the left and right side surfaces of the lower ejector plate (8), the clamping blocks (132) are located in the middle of the U-shaped protrusion (131), the tops of the opposite surfaces of the two clamping blocks (132) are clamped with spring blocks (133), and the middle positions of the left and right parts of the lower ejector plate (8) are fixedly mounted with limiting columns (135).

3. According to claim 2, a secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold is characterized in that: The front and rear positions of the elastic blocks (133) which are away from the top of a side surface and the tops of the two U-shaped protrusions (131) which are opposite to each other are both provided with an oblique angle.

4. The secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold according to claim 2 is characterized in that: A limiting groove (134) penetrating the spring block (133) is provided in the middle of the upper surface of the spring block (133); the top of the limiting column (135) extends into the inner cavity of the limiting groove (134); the front and rear positions of the spring block (133) are slidably connected to two pressing plates (136); the bottom of the two pressing plates (136) are fixedly installed at the front and rear positions of the groove on the side of the upper ejector pin plate (7) close to the U-shaped protrusion (131) and away from each other.

5. According to claim 2, a secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold is characterized by: Two spring grooves (137) are provided at front and rear positions of a side surface of the elastic block (133) away from the U-shaped protrusion (131); a spring 1 (138) is movably sleeved on the inner wall of the spring groove (137); and an end of the spring 1 (138) away from the elastic block (133) overlaps with a position of the upper ejector plate (7) close to the elastic block (133).

6. The secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold according to claim 1 is characterized in that: The side core pulling mechanism (15) comprises a push rod (151) and an outer core ring (154); the top position of the outer wall of the push rod (151) is movably sleeved with a wear-resistant sleeve (152); the outer wall of the wear-resistant sleeve (152) is fixedly sleeved with the bottom of the B plate (4); the bottom of the outer wall of the push rod (151) passes through the upper ejector plate (7) and the upper surface of the lower ejector plate (8) for fixed installation; the top of the push rod (151) is threadedly connected with a fixing bolt (153) passing through the outer core ring (154); the inner wall of the outer core ring (154) is overlapped with an inner core ring (155); the upper surface of the push rod (151) is fixedly installed with the bottom of the A plate (3); the left part of the outer core ring (154) is slidably connected with a side core slider (1510); the front and rear ends of the outer core ring (154) are The sides of the two side core sliders (1510) are slidably connected with sliders (156), the bottom of the side core slider (1510) is movably sleeved with two springs (1511) near one side of the barrel-type injection molded part (12), one end of the spring (1511) near the barrel-type injection molded part (12) overlaps with the inner core ring (155), and elastic pins (158) are fixedly installed on the tops of the opposite surfaces of the two sliders (156), the right end of the side core slider (1510) is plugged into the left side of the bottom of the outer wall of the barrel-type injection molded part (12), the outer walls of the opposite surfaces of the two elastic pins (158) are plugged into the front and rear positions of the bottom of the outer wall of the barrel-type injection molded part (12), and the bottoms of the opposite surfaces of the two sliders (156) are movably sleeved with springs (157), and the opposite ends of the springs (157) overlap with the inner core ring (155).

7. The secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold according to claim 6 is characterized by: The top surface on the left side of the side core slider (1510) and the top surfaces on the side away from the two sliders (156) are both slidably connected to the second limiting block (159), and the two ends of the second limiting blocks (159) are fixedly installed on the front, back and left sides of the upper surface of the outer core ring (154).

8. The secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold according to claim 6 is characterized by: The side core slider (1510) and the two sliders (156) are both provided with bevel angles 2 at the side surface away from the barrel-type injection molded part (12) and the bottom edge of the inner cavity of the B plate (4).

9. The secondary ejection mechanism for ejecting a barrel-type injection mold when inserting a needle and opening the mold according to claim 1, characterized in that: Two connecting plates (16) are detachably mounted on the left front side and the right rear side of the connection between the A plate (3) and the B plate (4).

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