A multi-color pen holder injection mold

Abstract

The present invention relates to the field of multi-color pen barrel injection molds, and discloses a multi-color pen barrel injection mold, including a mounting frame, a movable mold is arranged inside the mounting frame, a mounting groove is opened on the right side of the movable mold, and the upper and lower side walls of the mounting groove are both opened with T-shaped limit grooves, a cooling water reflux groove is opened inside the movable mold, and a hollow mold core is fixedly arranged on the right side of the movable mold. Compared with the prior art, the present application wraps the multi-color pen barrel that is first injection molded by a multi-color pen barrel protective component, so that dust cannot adhere to the surface of the multi-color pen barrel, avoiding the adhesion of different color raw materials caused by dust adhesion, thereby avoiding cracks at the connection of different color raw materials, and the first injection molded pen barrel is kept warm by heating after the two wedge blocks are in contact, avoiding the temperature drop during the movement of the pen barrel, resulting in a decrease in the bonding effect, so that the bonding between the different color raw materials of the multi-color pen barrel is tighter.

Description

Technical Field

[0001] The invention relates to the field of multi-color penholder injection molds, in particular to a multi-color penholder injection mold. Background Art

[0002] A multi-color pen barrel usually refers to a pen barrel with two or more colors. These colors form different visual effects or patterns on the same pen barrel through a specific manufacturing process. The multi-color pen barrel provides a more attractive visual effect through color contrast and combination. In addition to visual appeal, the multi-color pen barrel may also be specially designed in terms of feel, weight and comfort of use to enhance the overall user experience. However, compared with single-color pen barrels, multi-color pen barrels are more complicated in design and production process. The production process to achieve multi-color effect may include multi-color injection molding, which uses an injection mold to inject the pen barrel multiple times, so that the pen barrel has a variety of different colors.

[0003] A multi-color injection mold is a special type of injection mold that can produce pen barrels containing two or more colors through one or more injection molding processes. The types and structures of multi-color injection molds can have many different forms. The multi-color injection mold uses a movable mold to cooperate with multiple fixed molds of different molds to apply pressure, and each fixed mold is equipped with an independent nozzle for injecting molten plastic of the corresponding color. The flow of molten plastic is controlled by controlling the switch of each nozzle. According to the design requirements of the product, specific nozzles are selectively opened or closed to achieve the injection of different colors, and the pressure, speed and time of the injection of the molten raw material are controlled by the injection molding machine.

[0004] However, after the first injection molding, the movable mold takes the pen barrel out of the fixed mold through the hollow mold core, and the movable mold drives the pen barrel to move to the next fixed mold position through the hollow mold core. During this process, the heat on the pen barrel on the mold core will dissipate into the air, causing the temperature of the first injection-molded pen barrel to drop. When the temperature of the first injection-molded pen barrel is too low, it will affect the bonding effect of raw materials of different colors, resulting in cracks at the joints of different colors. The first injection-molded pen barrel moves in the air, and dust in the air will also adhere to the surface of the pen barrel. When the pen barrel is attached to the position where dust is attached, the bonding effect of the multi-color pen barrel will be reduced, resulting in cracks at the joints of different colors. The position where dust is attached is also prone to bulges, which reduces the aesthetics of the multi-color pen barrel. Based on the above problems, the present application proposes a multi-color pen barrel injection mold. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a multi-color pen barrel injection mold, which has the advantages of preventing dust from adhering to the surface of the multi-color pen barrel and reducing the temperature during the movement of the multi-color pen barrel, and solves a series of problems such as cracks at the joints of different colors of the multi-color pen barrel and protrusions on the surface of the multi-color pen barrel.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-color penholder injection mold, comprising:

[0007] An installation frame, wherein a movable mold is arranged inside the installation frame, an installation groove is provided on the right side of the movable mold, and T-shaped limit grooves are provided on the upper and lower side walls of the installation groove, a cooling water reflux groove is provided inside the movable mold, and a hollow mold core is fixedly arranged on the right side of the movable mold;

[0008] A multi-color penholder protection component, which is arranged inside the mounting groove and is used to protect the injection-molded penholder, and the multi-color penholder protection component comprises a wedge block slidably arranged inside the mounting groove, the facing surfaces of the wedge blocks are provided with connecting grooves, a T-shaped limit block is fixedly arranged on the inclined surface of the wedge block, the connecting groove is slidably arranged inside the T-shaped limit groove, and a return spring is connected between the left side of the T-shaped limit block and the left side wall of the T-shaped limit groove;

[0009] A multi-color pen cooling pipeline, which is arranged inside the movable mold and is used to cool and mold the multi-color pen after injection molding;

[0010] A movable mold moving component, which is arranged inside the mounting frame and is used to move and adjust the movable mold;

[0011] The fixed mold component is arranged inside the installation frame and is used to cooperate with the movable mold to injection mold the multi-color pen body.

[0012] Preferably, the multi-color pen body cooling pipeline includes a cooling water inlet pipe and a return pipe fixedly arranged inside the movable mold, a connecting pipe is fixedly arranged on the right side of the cooling water inlet pipe, a cooling water outlet pipe is fixedly arranged on the water outlet end of the connecting pipe, a mounting block is connected between the outer surface of the cooling water outlet pipe and the inside of the hollow mold core, and a delivery pipe is fixedly arranged on the water inlet end of the cooling water inlet pipe.

[0013] Preferably, the movable mold moving component includes a hydraulic push rod 1 fixedly arranged on the left side of the mounting frame, a movable plate is fixedly arranged on the output end of the hydraulic push rod 1, a T-shaped guide groove is opened on the right side of the movable plate, a T-shaped guide plate is slidably arranged inside the T-shaped guide groove, the T-shaped guide plate is fixedly arranged on the left side of the movable mold, a rectangular plate and a limit baffle are fixedly arranged on the right side of the movable plate, a hydraulic push rod 2 is fixedly arranged on the rear side of the rectangular plate, and the output end of the hydraulic push rod 2 is fixedly arranged on the rear side of the movable mold.

[0014] Preferably, the fixed mold component includes a fixed plate fixedly arranged inside the mounting frame, a rear fixed mold and a front fixed mold are fixedly arranged on the left side of the fixed plate, mold cavities are opened on the left sides of the rear fixed mold and the front fixed mold, an injection molding tube 1 is fixedly arranged on the right side of the rear fixed mold, and an injection molding tube 2 is fixedly arranged on the right side of the front fixed mold.

[0015] Preferably, the opening shape of the connecting groove is semicircular, the radius of the connecting groove is larger than the radius of the hollow mold core, and the interior of the hollow mold core is hollow.

[0016] Preferably, the water outlet end of the cooling water outlet pipe extends to the inside of the hollow mold core, the length of the cooling water outlet pipe is smaller than the length of the hollow mold core, and the inner diameter of the hollow mold core is larger than the outer diameter of the cooling water outlet pipe.

[0017] Preferably, there are two limit baffles, both of which are fixedly mounted on the right side of the movable plate and are symmetrically distributed, a through hole is provided on the front side of the rectangular plate, and the radius of the second output end of the hydraulic push rod is smaller than the radius of the through hole.

[0018] Compared with the prior art, the present invention provides a multi-color pen holder injection mold, which has the following beneficial effects:

[0019] 1. This multi-color pen barrel injection mold wraps the multi-color pen barrel that is molded by the first injection molding through a multi-color pen barrel protective component, so that dust cannot adhere to the surface of the multi-color pen barrel, thereby avoiding dust adhesion and causing a decrease in the adhesion of raw materials of different colors, thereby avoiding cracks at the connection between raw materials of different colors, and by electrically heating the two wedge blocks after contact, the first injection molded pen barrel is insulated, thereby avoiding the decrease in temperature during the movement of the pen barrel and causing a decrease in the bonding effect, thereby making the bonding between raw materials of different colors of the multi-color pen barrel tighter.

[0020] 2. This multi-color pen barrel injection mold increases the bonding effect of different color materials of the multi-color pen barrel by placing the overlapping color parts of the pen barrel formed by the first injection molding into the mold cavity of the second fixed mold, and melts and connects the molten raw material of the second injection molding to the overlapping color parts of the pen barrel, thereby avoiding cracks at the connection of different color materials of the multi-color pen barrel, thereby making the different color materials of the multi-color pen barrel melt into one.

[0021] 3. The multi-color pen barrel injection mold allows cooling water to be passed into the interior of the mold core through the multi-color pen barrel cooling pipe, shortening the heat transfer distance when the multi-color pen barrel is cooled, thereby accelerating the cooling speed of the multi-color pen barrel, avoiding the slow cooling speed that will increase the molding cycle and reduce production efficiency, and by controlling the flow rate of the cooling water, the cooling speed of the multi-color pen barrel can be controlled within a reasonable range, thereby avoiding the excessively fast cooling speed that will generate large internal stress inside the product, causing cracks or breakage of the product during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a left side view of the three-dimensional structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the movable mold of the present invention;

[0025] Figure 4 It is a longitudinal cross-sectional schematic diagram of a local structure of the present invention;

[0026] Figure 5 for Figure 4 A magnified view of the structure at A;

[0027] Figure 6 This is a schematic diagram of the structure of the multi-color pen protection component of the present invention;

[0028] Figure 7 This is a schematic diagram of the cooling pipeline structure of the multi-color pen holder of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the movable part of the movable mold of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the fixed mold component of the present invention.

[0031] In the figure: 1. Installation frame; 2. Moving mold; 3. Installation groove; 4. T-shaped limit groove; 5. Cooling water reflux groove; 6. Hollow mold core; 7. Multi-color pen protection component; 71. Wedge block; 72. Connecting groove; 73. T-shaped limit block; 74. Reset spring; 8. Multi-color pen cooling pipeline; 81. Cooling water inlet pipe; 82. Reflux pipe; 83. Connecting pipe; 84. Cooling water outlet pipe; 85. Installation block; 86. Delivery pipe; 9. Moving part of moving mold; 91. Hydraulic push rod one; 92. Moving plate; 93. T-shaped guide groove; 94. T-shaped guide plate; 95. Rectangular plate; 96. Hydraulic push rod two; 97. Limit baffle; 10. Fixed mold component; 101. Fixed plate; 102. Rear fixed mold; 103. Injection tube one; 104. Front fixed mold; 105. Injection tube two. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a multi-color pen barrel injection mold.

[0034] In a typical implementation of the present application, Figure 1-6As shown, a multi-color penholder injection mold comprises a mounting frame 1, a movable mold 2 is arranged inside the mounting frame 1, a mounting groove 3 is opened on the right side of the movable mold 2, and T-shaped limit grooves 4 are opened on the upper and lower side walls of the mounting groove 3, a cooling water reflux groove 5 is opened inside the movable mold 2, a hollow mold core 6 is fixedly arranged on the right side of the movable mold 2, and the movable mold 2 and the fixed mold component 10 are the main structure of the injection mold, which is used for the injection molding of multi-color penholders;

[0035] The multi-color pen barrel protection component 7 is arranged inside the installation groove 3 to protect the injection-molded pen barrel. The multi-color pen barrel protection component 7 includes a wedge block 71 slidably arranged inside the installation groove 3. The facing surfaces of the wedge block 71 are provided with connecting grooves 72. The opening shape of the connecting groove 72 is semicircular. The radius of the connecting groove 72 is larger than the radius of the hollow mold core 6. The inside of the hollow mold core 6 is hollow, which is convenient for the pen barrel to be injection-molded on the surface of the hollow mold core 6. The semicircular connecting groove 72 can fit the circular pen barrel more closely, avoiding the gap between the pen barrel and the connecting groove 72, which causes dust to adhere to the surface of the pen barrel. A T-shaped limit block 73 is fixedly arranged on the inclined surface of the wedge block 71. The connecting groove 72 is slidably arranged inside the T-shaped limit groove 4. A reset spring 74 is connected between the left side of the T-shaped limit block 73 and the left side wall of the T-shaped limit groove 4. When the first injection molding After that, the movable mold 2 drives the molded pen holder to move out through the hollow mold core 6. At this time, the wedge block 71 moves out of the installation groove 3 under the rebound action of the return spring 74, and the wedge block 71 drives the T-shaped limit block 73 to slide inside the T-shaped limit groove 4. When the T-shaped limit block 73 contacts the right side of the T-shaped limit groove 4, the wedge block 71 stops moving and wraps the first injection molded pen holder inside the connecting groove 72, so that the connecting groove 72 contacts the surface of the pen holder, so that the dust in the external environment cannot contact the pen holder, thereby preventing the dust in the external environment from adhering to the surface of the pen holder, avoiding the dust from reducing the adhesion between raw materials of different colors, and after the wedge block 71 contacts, it is powered on for heating, so that the temperature of the first injection molded pen holder is kept within the required temperature range, ensuring that the semi-finished pen holder of the first injection will neither be completely cooled nor overheated, so as to achieve the best bonding effect;

[0036] The multi-color pen cooling pipe 8 is arranged inside the movable mold 2 and is used to cool and mold the multi-color pen after injection molding. The cooling and molding speed of the multi-color pen can be increased, and the cooling speed can be controlled within a desired range by controlling the cooling water flow rate;

[0037] The movable mold moving component 9 is arranged inside the mounting frame 1, and is used to move and adjust the movable mold 2, and can push the movable mold 2 to close the fixed mold, and can adjust the position of the movable mold 2, so that the movable mold 2 is aligned with the fixed mold at different positions, so as to facilitate the injection molding of the multi-color pen holder;

[0038] The fixed mold component 10 is arranged inside the installation frame 1 and is used to cooperate with the movable mold 2 to injection-mold the multi-color pen body. It can cooperate with the movable mold 2 to complete multiple injection moldings, thereby completing the injection molding of raw materials of different colors.

[0039] As a preferred implementation in this embodiment, refer to Figure 7 The multi-color pen cooling pipeline 8 includes a cooling water inlet pipe 81 and a return pipe 82 fixedly arranged inside the movable mold 2. A connecting pipe 83 is fixedly arranged on the right side of the cooling water inlet pipe 81. A cooling water outlet pipe 84 is fixedly arranged at the outlet end of the connecting pipe 83. The outlet end of the cooling water outlet pipe 84 extends to the inside of the hollow mold core 6. The length of the cooling water outlet pipe 84 is less than the length of the hollow mold core 6. The inner diameter of the hollow mold core 6 is greater than the outer diameter of the cooling water outlet pipe 84, which is convenient for the cooling water to flow back to the cooling water reflux groove 5, thereby discharging the cooling water after absorbing heat. Secondly, it can avoid the hollow mold core 6 and the liquid outlet end of the cooling water outlet pipe 84 being too close to each other, resulting in a decrease in water output. The outer surface of the cooling water outlet pipe 84 is close to the inner surface of the hollow mold core 6. A mounting block 85 is connected between the parts, and a delivery pipe 86 is fixedly provided at the water inlet end of the cooling water inlet pipe 81. The cooling water enters the cooling water inlet pipe 81 through the delivery pipe 86, and enters the cooling water outlet pipe 84 through the connecting pipe 83, and finally enters the hollow cavity of the hollow mold core 6, and flows back to the cooling water reflux groove 5, and is discharged through the reflux pipe 82, which shortens the heat transfer distance of the multi-color pen barrel, thereby improving the cooling speed of the multi-color pen barrel, and in this process, by controlling the flow rate of the cooling water, the cooling speed of the multi-color pen barrel can be controlled within an appropriate range, avoiding the production cycle being too long due to too slow cooling speed, and avoiding cracks or breakage of too few pen barrels due to too fast cooling speed.

[0040] As a preferred implementation in this embodiment, refer to Figure 8The movable mold moving component 9 includes a hydraulic push rod 91 fixedly arranged on the left side of the mounting frame 1, a movable plate 92 is fixedly arranged at the output end of the hydraulic push rod 91, a T-shaped guide groove 93 is provided on the right side of the movable plate 92, a T-shaped guide plate 94 is slidably arranged inside the T-shaped guide groove 93, and the T-shaped guide plate 94 is fixedly installed on the left side of the movable mold 2. A rectangular plate 95 and a limit baffle 97 are fixedly arranged on the right side of the movable plate 92. There are two limit baffles 97, and the two limit baffles 97 are fixedly installed on the right side of the movable plate 92 and are symmetrically distributed. A through hole is penetrated on the front side of the rectangular plate 95. The radius of the output end of the hydraulic push rod 96 is smaller than the radius of the through hole. The two limit baffles 97 can limit the position of the movable mold 2 moving forward and backward, thereby avoiding the deviation between the movable mold 2 and the fixed mold, which causes the hollow mold core 6 to be separated from the fixed mold. The mold cavity is misaligned, thereby preventing the hollow mold core 6 from bending due to contact with the fixed mold surface after being misaligned. A hydraulic push rod 2 96 is fixedly arranged on the rear side of the rectangular plate 95. The output end of the hydraulic push rod 2 96 is fixedly installed on the rear side of the movable mold 2. The output end is driven by the hydraulic push rod 1 91 to push the movable plate 92 to move right. The movable plate 92 drives the movable mold 2 to move right through the T-shaped guide groove 93 and the T-shaped guide plate 94, thereby facilitating the mold closing of the movable mold 2 and the fixed mold. The output end of the hydraulic push rod 2 96 drives the movable mold 2 to move forward, and guides the movable mold 2 in the T-shaped guide groove 93 through the T-shaped guide plate 94, thereby adjusting the position of the movable mold 2, so that the movable mold 2 can be aligned with the fixed mold at different positions, thereby facilitating the movable mold 2 to insert the hollow mold core 6 into the mold cavity of different fixed molds, thereby completing the injection molding of the multi-color pen holder.

[0041] As a preferred implementation in this embodiment, refer to Fig. 9 The fixed mold component 10 includes a fixed plate 101 fixedly arranged inside the mounting frame 1, a rear fixed mold 102 and a front fixed mold 104 are fixedly arranged on the left side of the fixed plate 101, mold cavities are opened on the left sides of the rear fixed mold 102 and the front fixed mold 104, an injection tube 1 103 is fixedly arranged on the right side of the rear fixed mold 102, and an injection tube 2 105 is fixedly arranged on the right side of the front fixed mold 104. By installing the rear fixed mold 102 and the front fixed mold 104 at different positions, and cooperating with the movable movable mold 2, the movable mold 2 drives the first injection-molded pen body to move through the hollow mold core 6, and the first injection-molded pen body can be inserted into the mold cavity of the front fixed mold 104, and then molten raw materials of different colors are injected into the mold cavity of the front fixed mold 104 by an injection molding machine, so that the raw materials of different colors are bonded together, thereby producing a multi-color pen body.

[0042] Working principle of the present invention: when in use, when it is necessary to perform injection molding on a multi-color pen holder, the hydraulic push rod 91 drives the output end to push the movable plate 92 to move rightward, and the movable plate 92 drives the movable mold 2 to move rightward through the T-shaped guide groove 93 and the T-shaped guide plate 94, and the movable mold 2 is molded with the rear fixed mold 102, so that the hollow mold core 6 is inserted into the mold cavity of the rear fixed mold 102, and the molten raw material is injected into the injection tube 103 through the external injection molding machine, and enters the mold cavity of the rear fixed mold 102 through the injection tube 103, wherein, when the wedge block 71 contacts the rear fixed mold 102, the rear fixed mold 102 pushes the wedge block 71 to shrink into the installation groove 3, and controls the moving direction of the wedge block 71 through the T-shaped limit groove 4 and the T-shaped limit block 73, so that the wedge block 71 compresses the reset spring 74, thereby completely shrinking the wedge block 71 into the T-shaped limit groove 4;

[0043] The hydraulic push rod 91 drives the output end to drive the movable plate 92 to reset, and the movable plate 92 drives the movable mold 2 to separate from the rear fixed mold 102 through the T-shaped guide groove 93 and the T-shaped guide plate 94, and drives the multi-color pen holder that was first injected to move out of the mold cavity of the rear fixed mold 102 through the hollow mold core 6. In the process of separating the movable mold 2 from the rear fixed mold 102, the rebound of the reset spring 74 pushes the connecting wedge block 71 to move out from the inside of the installation groove 3, and drives the T-shaped limit block 73 to slide to the right in the T-shaped limit groove 4 through the connecting wedge block 71. When the wedge block 71 stops moving, the upper and lower wedge blocks 71 contact and wrap the multi-color pen holder that was first injected into the connecting groove 72. When the upper and lower wedge blocks 71 contact, the wedge block 71 is energized to heat and keep the multi-color pen holder that was first injected.

[0044] The output end of the hydraulic push rod 2 96 drives the movable mold 2 to move forward, and the movable mold 2 drives the T-shaped guide plate 94 to slide forward in the T-shaped guide groove 93, and the movable mold 2 is separated from the limit baffle 97 on the rear side. When the movable mold 2 contacts the limit baffle 97 on the front side, the output end of the hydraulic push rod 2 96 stops moving, and the movable plate 92 is pushed to move by the output end of the hydraulic push rod 1 91. The movable plate 92 drives the movable mold 2 to close the mold with the front fixed mold 104 through the T-shaped guide groove 93 and the T-shaped guide plate 94. The front fixed mold 104 will push the wedge block 71 to shrink into the T-shaped limit groove 4, so that the multi-color pen holder of the first injection molding enters the mold cavity of the front fixed mold 104, and the molten raw material enters the injection molding tube 2 105 through the injection molding machine, and enters the mold cavity of the front fixed mold 104 through the injection molding tube 2 105, so that the molten raw material is melted and connected with the pen holder of the first injection molding;

[0045] During the first injection molding and the second injection molding process, the cooling water enters the cooling water inlet pipe 81 through the delivery pipe 86, and is diverted into the connecting pipe 83 through the cooling water inlet pipe 81, and then enters the hollow cavity of the hollow mold core 6 through the cooling water outlet pipe 84, and flows back to the cooling water reflux groove 5 through the hollow mold core 6, and is discharged from the cooling water reflux groove 5 through the reflux pipe 82. During this process, the heat of the multi-color pen body of the first injection molding and the second injection molding is transferred to the cooling water through the hollow mold core 6, so that the pen body of the first injection molding and the second injection molding is cooled, and the cooling speed of the multi-color pen body is controlled by controlling the flow rate of the cooling water.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-color penholder injection mold, characterized in that: include, A mounting frame (1), wherein a movable mold (2) is arranged inside the mounting frame (1), a mounting groove (3) is provided on the right side of the movable mold (2), upper and lower side walls of the mounting groove (3) are provided with T-shaped limit grooves (4), a cooling water reflux groove (5) is provided inside the movable mold (2), and a hollow mold core (6) is fixedly arranged on the right side of the movable mold (2); A multi-color penholder protection component (7), which is arranged inside the mounting groove (3) and is used to protect the injection-molded penholder, the multi-color penholder protection component (7) comprising a wedge block (71) slidably arranged inside the mounting groove (3), the facing surfaces of the wedge block (71) are provided with connecting grooves (72), a T-shaped limit block (73) is fixedly arranged on the inclined surface of the wedge block (71), the connecting groove (72) is slidably arranged inside the T-shaped limit groove (4), and a return spring (74) is connected between the left side of the T-shaped limit block (73) and the left side wall of the T-shaped limit groove (4); A multi-color pen holder cooling pipeline (8), wherein the multi-color pen holder cooling pipeline (8) is arranged inside the movable mold (2) and is used to cool and mold the multi-color pen holder after injection molding; A movable mold moving component (9), wherein the movable mold moving component (9) is arranged inside the mounting frame (1) and is used to move and adjust the movable mold (2); A fixed mold component (10) is arranged inside the installation frame (1) and is used to cooperate with the movable mold (2) to perform injection molding on the multi-color pen holder.

2. A multi-color penholder injection mold according to claim 1, characterized in that: The multi-color pen holder cooling pipeline (8) comprises a cooling water inlet pipe (81) and a return pipe (82) fixedly arranged inside the movable mold (2); a connecting pipe (83) is fixedly arranged on the right side of the cooling water inlet pipe (81); a cooling water outlet pipe (84) is fixedly arranged at the water outlet end of the connecting pipe (83); a mounting block (85) is connected between the outer surface of the cooling water outlet pipe (84) and the inside of the hollow mold core (6); and a delivery pipe (86) is fixedly arranged at the water inlet end of the cooling water inlet pipe (81).

3. The multi-color penholder injection mold according to claim 1, characterized in that: The movable mold moving component (9) comprises a hydraulic push rod 1 (91) fixedly arranged on the left side of the mounting frame (1); a movable plate (92) is fixedly arranged on the output end of the hydraulic push rod 1 (91); a T-shaped guide groove (93) is provided on the right side of the movable plate (92); a T-shaped guide plate (94) is slidably arranged inside the T-shaped guide groove (93); the T-shaped guide plate (94) is fixedly arranged on the left side of the movable mold (2); a rectangular plate (95) and a limit baffle (97) are fixedly arranged on the right side of the movable plate (92); a hydraulic push rod 2 (96) is fixedly arranged on the rear side of the rectangular plate (95); and the output end of the hydraulic push rod 2 (96) is fixedly arranged on the rear side of the movable mold (2).

4. The multi-color penholder injection mold according to claim 1, characterized in that: The fixed mold component (10) comprises a fixed plate (101) fixedly arranged inside the mounting frame (1); a rear fixed mold (102) and a front fixed mold (104) are fixedly arranged on the left side of the fixed plate (101); mold cavities are provided on the left sides of the rear fixed mold (102) and the front fixed mold (104); an injection molding tube 1 (103) is fixedly arranged on the right side of the rear fixed mold (102); and an injection molding tube 2 (105) is fixedly arranged on the right side of the front fixed mold (104).

5. The multi-color penholder injection mold according to claim 1, characterized in that: The opening shape of the connection groove (72) is semicircular, the radius of the connection groove (72) is greater than the radius of the hollow mold core (6), and the interior of the hollow mold core (6) is hollow.

6. The multi-color penholder injection mold according to claim 2, characterized in that: The water outlet end of the cooling water outlet pipe (84) extends to the interior of the hollow mold core (6); the length of the cooling water outlet pipe (84) is smaller than the length of the hollow mold core (6); and the inner diameter of the hollow mold core (6) is larger than the outer diameter of the cooling water outlet pipe (84).

7. The multi-color penholder injection mold according to claim 3, characterized in that: There are two limit baffles (97), both of which are fixedly mounted on the right side of the movable plate (92) and are symmetrically distributed. A through hole is provided on the front side of the rectangular plate (95), and the radius of the output end of the second hydraulic push rod (96) is smaller than the radius of the through hole.

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