Refill injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a refill injection mold which comprises a front mold frame and a rear mold frame, guide sleeves are mounted at four corners of the front mold frame, guide columns are mounted at four corners of the rear mold frame, the guide sleeves are sleeved at one ends of the guide columns and slidably connected with the guide columns, and the rear mold frame is movably connected with the front mold frame through the guide columns and the guide sleeves. A mold foot and a rear mold frame bottom plate are sequentially installed on one side of the rear mold frame, two oppositely-distributed clamping cylinders are installed on the side face of the rear mold frame, a mold core and a clamping mechanism are installed between the front mold frame and the rear mold frame in an embedded mode, and the clamping mechanism is in driving connection with the clamping cylinders; the clamping mechanism is matched with the clamping cylinder to clamp the conductive material and is matched with the injection mold to compound the pen point part and the conductive material together, so that integral injection molding is realized, the subsequent assembly process is omitted, and the pen core and the pen point part have extremely high waterproof performance and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically relates to a pen core injection mold. Background Art

[0002] An injection mold is a key tool used in the injection molding process, mainly used for manufacturing plastic products. Its basic structure includes a mold cavity, a runner system, a nozzle, a cooling system, and an ejector pin system. The mold cavity determines the shape and size of the finished product, the runner system guides the molten plastic into the cavity, the nozzle is responsible for injecting the plastic into the mold, the cooling system controls the mold temperature to ensure uniform cooling of the plastic, and the ejector pin system is used to push out the molded product after the mold is opened. The design of the injection mold needs to comprehensively consider the plastic fluidity, cooling effect, and mold durability to ensure the production of high-quality plastic parts.

[0003] When processing a stylus pen, an injection mold is also applied. The pen barrel, pen core, pen cap, etc. of the stylus pen are injection molded through the injection mold, and then assembled to achieve batch and rapid production. However, there are still certain problems: in the traditional injection molding process of the pen core of a stylus pen, separate injection molding is mostly used, and then the pen tip and the conductive material are assembled together to form the pen core structure. The waterproof performance and structural stability of the later assembled pen core are poor. Therefore, in view of the above current situation, there is an urgent need to develop a pen core injection mold to overcome the deficiencies in current practical applications and meet the current requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pen core injection mold to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a pen core injection mold, including a front mold base and a rear mold base. Guide sleeves are installed at the four corners of the front mold base, and guide posts are installed at the four corners of the rear mold base. The guide sleeves are sleeved on one end of the guide posts and are slidably connected to the guide posts. The rear mold base is movably connected to the front mold base through the guide posts and guide sleeves. A mold foot and a rear mold base bottom plate are sequentially installed on one side of the rear mold base. Two relatively distributed clamping cylinders are installed on the side surface of the rear mold base. A mold core and a clamping mechanism are embedded between the front mold base and the rear mold base. The clamping mechanism is drivingly connected to the clamping cylinders;

[0006] The clamping mechanism includes a mounting frame, a limiting frame, a telescopic frame, and clamping shafts. The mounting frame is fixedly arranged on the side surface of the rear mold base, the limiting frame is fixedly arranged on one side of the mounting frame, the telescopic frame is located on one side of the limiting frame and is slidably connected to the limiting frame, and a plurality of clamping shafts are horizontally fixedly arranged on the edge of the telescopic frame.

[0007] Preferably, a front mold base bottom plate is fixedly arranged on one side of the front mold base, and a locating ring is installed at the middle position of the front mold base bottom plate.

[0008] Preferably, an ejector plate is installed between the bottom plate of the rear mold base and the rear mold base. Specifically, there are two ejector plates in total, and a number of ejector pins for demolding are inserted therein.

[0009] Preferably, there are two sets of clamping mechanisms which are distributed oppositely. Each set of clamping mechanisms has four clamping shafts. Specifically, they constitute four pen refill injection molding stations.

[0010] Preferably, an inner shaft is installed inside the clamping cylinder, and the end of the inner shaft is fixedly connected to the telescopic frame. Specifically, the clamping cylinder and the telescopic frame are arranged to drive the clamping shafts to clamp the pen refill components.

[0011] Preferably, a sprue bushing is installed at the middle position of the front mold base. The sprue bushing is horizontally aligned with the locating ring. Cooling channels a and b are embedded inside the front mold base. Specifically, the ends of cooling channels a and b extend into the mold core and the mold insert, and can dissipate heat after injection molding is completed, accelerating the curing speed of the raw material.

[0012] Preferably, a detachable mold insert is installed inside the mold core. An injection molding runner is formed inside the mold core. Specifically, the mold core is composed of a front mold core and a rear mold core, which are respectively installed inside the front mold base and the rear mold base. A number of front mold inserts and rear mold inserts are respectively installed inside the front mold core and the rear mold core, and the injection molding raw material is guided into the mold insert through the injection molding runner for molding.

[0013] Preferably, the mold insert is composed of a front mold insert and a rear mold insert. A through hole is formed at the middle position of the rear mold insert. A groove for clamping the pen refill parts is formed inside the rear mold insert. Specifically, pen refill forming grooves which are matched and formed with each other are formed at the contact parts between the front mold insert and the rear mold insert.

[0014] Compared with the prior art, the present utility model provides a pen refill injection mold, which has the following beneficial effects:

[0015] 1. The clamping mechanism and the clamping cylinder are arranged to clamp the conductive material, and cooperate with the injection mold to compound the nib part with the conductive material, realizing integral injection molding, omitting the subsequent assembly process, so that the pen refill and the nib part have extremely strong waterproof performance and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0017] Figure 1 It is a front structural schematic diagram of the present utility model;

[0018] Figure 2 This is a schematic side view of the present utility model;

[0019] Figure 3 This is a schematic view of the cooling water channel a of the present utility model;

[0020] Figure 4 This is a schematic view of the clamping cylinder of the present utility model;

[0021] Figure 5 This is a schematic view of the clamping mechanism of the present utility model;

[0022] Figure 6 This is a schematic view of the mold core of the present utility model.

[0023] In the figure: 10, front mold base bottom plate; 101, locating ring; 20, front mold base; 201, guide bushing; 202, sprue bushing; 203, cooling water channel a; 204, cooling water channel b; 30, rear mold base; 301, guide pin; 40, ejector plate; 50, rear mold base bottom plate; 60, mold feet; 70, clamping cylinder; 701, inner shaft; 80, mold core; 801, mold cavity; 8011, front mold cavity; 8012, rear mold cavity; 802, injection runner; 90, clamping mechanism; 901, mounting bracket; 902, limiting bracket; 903, telescopic bracket; 904, clamping shaft. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Embodiment:

[0027] Please refer to Figures 1-6The utility model provides a technical solution: a pen core injection mold, comprising a front mold frame 20 and a rear mold frame 30, wherein guide sleeves 201 are installed at the four corners of the front mold frame 20, and guide posts 301 are installed at the four corners of the rear mold frame 30, wherein the guide sleeves 201 are sleeved on one end of the guide posts 301 and are slidably connected with the guide posts 301, wherein the rear mold frame 30 is movably connected with the front mold frame 20 through the guide posts 301 and the guide sleeves 201, wherein a mold foot 60 and a rear mold frame bottom plate 50 are sequentially installed on one side of the rear mold frame 30, wherein two relatively distributed clamping cylinders 70 are installed on the side of the rear mold frame 30, wherein a mold core 80 and a clamping mechanism 90 are embedded and installed between the front mold frame 20 and the rear mold frame 30, and the clamping mechanism 90 is drivingly connected with the clamping cylinder 70;

[0028] The clamping mechanism 90 includes a mounting frame 901, a limiting frame 902, a telescopic frame 903 and a clamping shaft 904. The mounting frame 901 is fixed on the side of the rear mold frame 30, the limiting frame 902 is fixed on one side of the mounting frame 901, the telescopic frame 903 is located on one side of the limiting frame 902 and is slidably connected to the limiting frame 902, and a plurality of clamping shafts 904 are horizontally fixed on the edge of the telescopic frame 903.

[0029] Preferably, a front mold frame bottom plate 10 is fixedly provided on one side of the front mold frame 20 , and a positioning ring 101 is installed in the middle position of the front mold frame bottom plate 10 .

[0030] Preferably, an ejector plate 40 is installed between the rear mold frame bottom plate 50 and the rear mold frame 30. Specifically, there are two ejector plates 40, and a plurality of ejector pins for demoulding are penetrated inside.

[0031] Preferably, the clamping mechanisms 90 are provided in two groups and are relatively distributed, and each group of the clamping mechanisms 90 is provided with four clamping shafts 904 . Specifically, they constitute four refill injection molding stations.

[0032] Preferably, an inner shaft 701 is installed inside the clamping cylinder 70, and the end of the inner shaft 701 is fixedly connected to the telescopic frame 903. Specifically, the clamping cylinder 70 cooperates with the telescopic frame 903 to drive the clamping shaft 904 to clamp the refill element.

[0033] Preferably, a gate sleeve 202 is installed in the middle position of the front mold frame 20, and the gate sleeve 202 is horizontally aligned with the positioning ring 101. The interior of the front mold frame 20 is embedded with cooling water channels a203 and cooling water channels b204. Specifically, the ends of the cooling water channels a203 and cooling water channels b204 extend into the mold core 80 and the mold core 801, which can perform heat dissipation treatment on them after the injection molding is completed, thereby accelerating the solidification speed of the raw materials.

[0034] Preferably, a detachable mold core 801 is installed inside the mold insert 80, and an injection molding runner 802 is formed inside the mold insert 80. Specifically, the mold insert 80 is composed of a front mold insert and a rear mold insert, which are respectively installed in the front mold base 20 and the rear mold base 30. A plurality of front mold cores 8011 and rear mold cores 8012 are respectively installed in the front mold insert and the rear mold insert, and the injection molding raw material is guided into the interior of the mold core 801 through the injection molding runner 802 for molding.

[0035] Preferably, the mold core 801 is composed of a front mold core 8011 and a rear mold core 8012. A through hole is formed in the middle position of the rear mold core 8012, and a groove for clamping the pen core part is formed inside the rear mold core 8012. Specifically, pen core molding grooves that are matched and formed with each other are formed at the contact parts of the front mold core 8011 and the rear mold core 8012.

[0036] Working principle: Install the pen core injection mold on a matching injection molding machine. The injection molding machine melts plastic particles and injects them into the interior of the injection mold through the sprue bushing 202. The liquid plastic raw material is injected into the pen core molding groove between the front mold insert 801 and the rear mold insert 802 through the injection molding runner 802. Subsequently, the mold insert 80 and the mold core 801 are cooled by the cooling water channel a203 and the cooling water channel b204 to promote the molding and curing of the raw material. After curing, the injection molding machine drives the front mold base plate 10, the front mold base 20 and the front mold insert away from the rear mold insert. Then, the clamping cylinder 70 cooperates with the inner shaft 701 to drive the telescopic frame 903 and the clamping shaft 904 to move away from each other, so as to no longer clamp the conductive material of the pen core. Finally, the ejector pins on the ejector plate 40 eject the molded pen core out of the mold to complete the entire injection molding process. Subsequently, a new conductive material is again placed into the slot of the rear mold core 8012 and clamped by the clamping mechanism 90. Finally, the mold is closed, and the above injection molding process is repeated.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. A pen refill injection mold, characterized in that: It includes a front mold base (20) and a rear mold base (30). Guide sleeves (201) are installed at the four corner positions of the front mold base (20), and guide posts (301) are installed at the four corner positions of the rear mold base (30). The guide sleeve (201) is sleeved on one end of the guide post (301) and is slidably connected to the guide post (301). The rear mold base (30) is movably connected to the front mold base (20) through the guide posts (301) and guide sleeves (201). On one side of the rear mold base (30), a mold foot (60) and a rear mold base bottom plate (50) are sequentially installed. Two oppositely distributed clamping cylinders (70) are installed on the side surface of the rear mold base (30). A mold core (80) and a clamping mechanism (90) are embedded and installed between the front mold base (20) and the rear mold base (30), and the clamping mechanism (90) is drivingly connected to the clamping cylinder (70); The clamping mechanism (90) includes a mounting frame (901), a limiting frame (902), a telescopic frame (903) and a clamping shaft (904). The mounting frame (901) is fixedly arranged on the side surface of the rear mold base (30), the limiting frame (902) is fixedly arranged on one side of the mounting frame (901), the telescopic frame (903) is located on one side of the limiting frame (902) and is slidably connected to the limiting frame (902), and a plurality of the clamping shafts (904) are horizontally and fixedly arranged on the edge of the telescopic frame (903).

2. The refill injection mold according to claim 1, characterized in that: On one side of the front mold base (20), a front mold base bottom plate (10) is fixedly arranged, and a locating ring (101) is installed at the middle position of the front mold base bottom plate (10).

3. The injection mold for pen refills according to claim 1, characterized in that: A ejector plate (40) is installed between the rear mold base bottom plate (50) and the rear mold base (30).

4. The refill injection mold according to claim 1, wherein: There are two groups of the clamping mechanisms (90) which are oppositely distributed, and each group of the clamping mechanisms (90) has four clamping shafts (904).

5. The refill injection mold according to claim 1, characterized in that: An inner shaft (701) is installed inside the clamping cylinder (70), and the end of the inner shaft (701) is fixedly connected to the telescopic frame (903).

6. The refill injection mold according to claim 1, wherein: A sprue bushing (202) is installed at the middle position of the front mold base (20), the sprue bushing (202) is horizontally aligned with the locating ring (101), and a cooling water channel a (203) and a cooling water channel b (204) are embedded and installed inside the front mold base (20).

7. A refill injection mold according to claim 1, characterized in that: A detachable mold core (801) is installed inside the mold core (80), and an injection molding runner (802) is arranged inside the mold core (80).

8. A refill injection mold according to claim 7, characterized in that: The mold core (801) is composed of a front mold core (8011) and a rear mold core (8012). A through hole is arranged at the middle position of the rear mold core (8012), and a groove for clamping a pen core part is arranged inside the rear mold core (8012).

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