Injection mold with ejection structure

Abstract

The utility model discloses an injection mold with ejection structure relates to injection molding technical field. The utility model discloses a movable mould, and the side wall of movable mould is butt joint with fixed mould, and the side of movable mould is equipped with ejection assembly, and ejection assembly includes the placement board of being equipped with movable mould side, and the side wall of placement board is rectangular array fixedly connected with the push rod, and the push rod is through movable mould, and the common connection of four push rods has the top plate, and the periphery lateral wall of push rod is screw -threaded connection has the screw ring, and the side wall of screw ring is connected with the reset spring cover and is equipped on the periphery lateral wall of push rod. The side wall of movable mould is equipped with anti -collision subassembly. The utility model sets up ejection assembly, and push rod replaces the diameter of thimble, and push rod is much larger than the diameter of thimble, and increases the load capacity, effectively avoids the push rod bending when ejecting injection molding product, increases the service life, reduces the replacement of push rod, saves the material, and sets up anti -collision subassembly, weakens the impact intensity when movable mould and fixed mould close, avoids the fixed mould and loosens because of the excessive vibration, and more stably carries out injection molding.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology, and in particular relates to an injection mold with an ejection structure. Background Technology

[0002] A workpiece refers to a product component during the manufacturing or processing process. There are many types of workpieces used in daily work, and their shapes vary. Some workpieces have simple shapes and can be produced manually. However, for workpieces with complex shapes, manual production is not only labor-intensive but also requires highly skilled workers. Furthermore, the dimensions of the produced workpieces can vary significantly. With the advent of injection molding, these problems have been solved. Injection molding inevitably involves injection molds, which consist of a fixed mold and a movable mold. After the fixed and movable molds are closed, molten material is injected into the fixed mold through an injection nozzle. The molten material inside the fixed mold is cooled and solidified. Subsequently, the fixed and movable molds open, and the molded product inside the fixed mold moves out with the movable mold. To facilitate automatic unloading of the molded product from the movable mold, an ejector structure is installed on it. The ejector structure consists of ejector pins, ejector pin fixing plates, return springs, and limit rods.

[0003] A search revealed a patent document with patent publication number CN222473261U, which discloses an injection mold with an ejection structure, comprising: a lower mold, an upper mold, the upper mold being disposed above the lower mold, a positioning rod being fixedly installed at the bottom of the upper mold, a positioning hole being provided at the top of the lower mold, the positioning rod being inserted into the positioning hole, a multi-stage ejection mechanism being disposed in the inner cavity of the lower mold and capable of ejecting the mold, and a buffer mechanism being disposed between the multi-stage ejection mechanism and the lower mold.

[0004] However, injection molds with ejection structures still have the following shortcomings in practical use:

[0005] After the injection molding material inside the fixed mold cools and solidifies, the cylinder is opened, and the piston rod at the telescopic end of the cylinder retracts, driving the movable mold away from the fixed mold, thus opening the mold and allowing the injection molded product to move out of the inner bottom of the fixed mold. At the same time, the ejector pin and ejector pin fixing plate move with the movable mold. When the ejector pin fixing plate is blocked and cannot move with the movable mold, the return spring on the side wall of the ejector pin is compressed, and the ejector pin penetrates the movable mold, pushing the injection molded product attached to the movable mold off, thus achieving material discharge. However, because the ejector pin has a small diameter and insufficient load capacity, it is prone to bending and breaking during the ejection process, reducing the service life of the ejector pin, increasing the number of times the ejector pin needs to be replaced, and increasing the amount of material used.

[0006] 2. During the injection molding process, the movable mold and the fixed mold need to be closed. Molten material is then injected into the interior of the fixed mold through the injection nozzle on the fixed mold. The molten material inside the fixed mold then cools and solidifies. During the closing process of the movable mold and the fixed mold, they will come into contact and collide. Since there are no buffering components between the movable mold and the fixed mold, the collision force between the movable mold and the fixed mold is large, which may even cause damage to the movable mold and the fixed mold. The fixed mold may also loosen due to large vibrations, reducing the stability of the fixed mold and affecting the injection molding quality.

[0007] To address these issues, we provide an injection mold with an ejection structure. Utility Model Content

[0008] The purpose of this utility model is to provide an injection mold with an ejection structure. By setting an ejection assembly, the ejector pin replaces the ejector pin, which prevents the ejector pin from bending during the ejection process, reduces the replacement frequency of the ejector pin, reduces the material usage, and by setting an anti-collision assembly, weakens the impact force when the moving mold and the fixed mold are closed, and prevents the fixed mold from loosening due to excessive vibration, thereby solving the technical problems mentioned in the background art.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model relates to an injection mold with an ejection structure, comprising a movable mold, a fixed mold abutting against the side wall of the movable mold, an ejection assembly provided on the side of the movable mold, the ejection assembly including a mounting plate provided on the side of the movable mold, ejector rods fixedly connected in a rectangular array on the side wall of the mounting plate penetrating the movable mold, a top plate connecting the four ejector rods, a threaded ring connected to the peripheral side wall of the ejector rod, a return spring connected to the side wall of the threaded ring sleeved on the peripheral side wall of the ejector rod, and a collar connected to the other end of the return spring sleeved on the peripheral side wall of the ejector rod; an anti-collision assembly provided on the side wall of the movable mold, the anti-collision assembly including a rectangular array of connecting blocks mounted on the side wall of the movable mold, a limit rod fixedly connected to the side wall of the connecting blocks, a spring body connected to the side wall of the connecting blocks sleeved on the peripheral side wall of the limit rod, a slot opened on one side wall of the fixed mold, a through hole opened on the other side wall of the fixed mold communicating with the slot, and the limit rod penetrating the slot and the through hole in sequence.

[0011] The present invention is further configured such that the sealing ring provided on the side wall of the movable mold is located on the side closer to the fixed mold, and the sealing ring provided on the side wall of the fixed mold is located on the side closer to the movable mold.

[0012] The present invention is further configured such that ear plates are symmetrically fixed to the two side walls of the fixed mold, and internal threaded holes are symmetrically opened on the side walls of the ear plates. The injection nozzle opened on the side wall of the fixed mold is located on the side away from the movable mold.

[0013] The present invention is further configured such that a sealing ring is provided on the inner wall of the groove opened on the side wall of the movable mold, and the thickness of the top plate is equal to the inner depth of the groove.

[0014] The present invention is further configured such that the connecting rods installed in a rectangular array on the side wall of the movable mold are located on the side away from the fixed mold, and a mold fixing plate is installed together between the four connecting rods, and the connecting plate installed on the side wall of the mold fixing plate is located on the side away from the placement plate.

[0015] The present invention is further configured such that the mounting plate disposed on the side of the connecting plate is located away from the mold fixing plate, a cylinder is installed through the side wall of the mounting plate, the piston rod end of the cylinder extension end is connected to the side wall of the connecting plate, ear rods are fixedly connected in a rectangular array on the side wall of the mounting plate, and fixing rods are fixedly connected in a rectangular array on the side wall of the mounting plate, the positions of the fixing rods and ear rods correspond one-to-one.

[0016] The present invention is further configured such that a rectangular array of guide rods are fixedly connected to the side wall of the connecting plate, and the guide rods penetrate the side wall of the mounting plate.

[0017] The present invention is further configured such that the outer diameter of the connecting block is equal to the inner diameter of the slot, and the inner diameter of the through hole is half the inner diameter of the slot.

[0018] This utility model has the following beneficial effects:

[0019] This invention utilizes an ejector assembly. When the cylinder is opened and the piston rod at the telescopic end of the cylinder retracts, the movable mold moves away from the fixed mold, thus opening the mold. At this time, the connecting plate, mold fixing plate, and mounting plate also move away from the fixed mold. When the fixing rod blocks the movement of the lug, the mounting plate stops moving, and the movable mold continues to move away from the fixed mold. The return spring is compressed, and the ejector plate moves out of the groove, pushing the injection molded product attached to the movable mold off, thus unloading the injection molded product. An ejector rod replaces the ejector pin. Since the diameter of the ejector rod is much larger than that of the ejector pin, the load capacity of the ejector rod is much greater than that of the ejector pin, preventing the ejector rod from bending during the pushing of the injection molded product, increasing its service life, reducing the frequency of ejector rod replacement, reducing material usage, and achieving the goal of saving material. When the piston rod at the telescopic end of the cylinder extends, the movable mold approaches the fixed mold, thus closing the mold. The return spring resets, and the ejector plate re-enters the groove.

[0020] This utility model, by setting up an anti-collision component, when the mold is closed, the spring body (303) first contacts the inner wall of the slot and compresses, pushing the limit rod through the through hole to achieve buffering. The movable mold and the fixed mold then come into contact, and the mold closing is completed. During this process, the characteristics of the spring body are used to reduce the impact force when the movable mold and the fixed mold come into contact, thus providing anti-collision protection for the movable mold and the fixed mold. At the same time, it avoids excessive vibration to the fixed mold, which could cause the fixed mold to loosen, and allows for more stable injection molding. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 A three-dimensional schematic diagram of an injection mold with an ejection structure;

[0023] Figure 2 This is a plan view of an injection mold with an ejection structure;

[0024] Figure 3 A schematic cross-sectional view showing the connection between the movable mold and the ejector assembly;

[0025] Figure 4 This is a schematic cross-sectional view showing the connection between the movable mold, the fixed mold, and the anti-collision components.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1-Moving mold, 101-Fixed mold, 101a-Ear plate, 101b-Injection nozzle, 102-Groove, 102a-Sealing ring, 103-Hole, 103a-Through hole, 2-Ejection assembly, 201-Mounting plate, 201a-Fixing rod, 202-Cylinder, 203-Connecting plate, 203a-Guide rod, 204-Mold fixing plate, 204a-Connecting rod, 205-Ejector rod, 205a-Reset spring, 205b-Threaded ring, 205c-Collar ring, 206-Ear rod, 207-Stabilizing plate, 208-Top plate, 3-Anti-collision assembly, 301-Connecting block, 302-Limiting rod, 303-Spring body. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] Example 1

[0030] Please see Figure 1 and Figure 2 The present invention is an injection mold with an ejection structure, including a movable mold 1, a fixed mold 101, an injection nozzle 101b and a sealing ring 102a. The injection nozzle 101b is used to inject molten plastic into the fixed mold 101, and the sealing ring 102a is used to increase the sealing effect of the contact surface between the movable mold 1 and the fixed mold 101 to prevent the molten plastic inside the fixed mold 101 from leaking.

[0031] Specifically, a fixed mold 101 abuts against the side wall of the movable mold 1. The injection nozzle 101b opened on the side wall of the fixed mold 101 is located on the side away from the movable mold 1. The sealing ring 102 provided on the side wall of the movable mold 1 is located on the side close to the fixed mold 101. The sealing ring 102 provided on the side wall of the fixed mold 101 is located on the side close to the movable mold 1.

[0032] Furthermore, ear plates 101a are symmetrically fixed to the two side walls of the fixed mold 101, and internal threaded holes are symmetrically opened on the side walls of the ear plates 101a for fixing and installing the fixed mold 101.

[0033] The operation process of this embodiment is as follows: place the fixed mold 101 on the injection molding machine, rotate the bolt on the ear plate 101a clockwise to fix the fixed mold 101 on the injection molding machine, and after the movable mold 1 and the fixed mold 101 are closed, inject molten plastic into the fixed mold 101 through the injection nozzle 101b.

[0034] Example 2

[0035] Please see Figure 1 , Figure 2 and Figure 3 Based on the first specific embodiment, an ejector assembly 2 is provided. The ejector assembly 2 includes an ejector rod 205, a return spring 205a, a screw ring 205b, a collar 205c, a mounting plate 207, and a top plate 208. The ejector rod 205 replaces the ejector pin. Since the diameter of the ejector rod 205 is much larger than that of the ejector pin, the load capacity of the ejector rod 205 is much greater than that of the ejector pin. This effectively prevents the ejector rod 205 from bending when pushing the injection molded product, increases its service life, reduces the replacement frequency of the ejector rod 205, reduces material usage, and achieves the purpose of saving materials.

[0036] Specifically, the mounting plate 207 on the side of the movable mold 1 is located away from the fixed mold 101. The mounting plate 207 has a rectangular array of ejector rods 205 fixedly connected to its side wall. The ejector rods 205 penetrate the movable mold 1. The four ejector rods 205 are connected together by a top plate 208. The groove 102 on the side wall of the movable mold 101 is located near the fixed mold 101. The inner wall of the groove 102 is provided with a sealing ring 102a. The top plate 208 is inserted into the inside of the groove 102. The peripheral side wall of the ejector rod 205 is threaded with a threaded ring 205b. The return spring 205a connected to the side wall of the threaded ring 205b is sleeved on the peripheral side wall of the ejector rod 205. The other end of the return spring 205a is connected to a collar 205c, which is sleeved on the peripheral side wall of the ejector rod 205.

[0037] Furthermore, a cylinder 202 is installed through the side wall of the mounting plate 201. The piston rod end of the telescopic end of the cylinder 202 is connected to a connecting plate 203. A guide rod 203a is fixedly connected in a rectangular array on the side wall of the connecting plate 203. The guide rod 203a passes through the mounting plate 201. A mold fixing plate 204 abuts against the side wall of the placement plate 207. A connecting rod 204a is installed in a rectangular array on the side wall of the mold fixing plate 204. The connecting rod 204a is installed on the side wall of the movable mold 1. The mold fixing plate 204 is installed on the side wall of the connecting plate 203. A lug 206 is fixedly connected in a rectangular array on the side wall of the placement plate 207. The lug 206 passes through the mold fixing plate 204 and the connecting plate 203 in sequence. A fixing rod 201a is fixedly connected in a rectangular array on the side wall of the mounting plate 201. The positions of the fixing rod 201a and the lug 206 correspond one-to-one. The thickness of the top plate 208 is equal to the internal depth of the groove 102.

[0038] The operation process of this embodiment is as follows: When cylinder 202 is opened, and the piston rod at the telescopic end of cylinder 202 retracts, the connecting plate 203 moves closer to the mounting plate 201. The mold fixing plate 204, connecting rod 204a, and movable mold 1 move accordingly, opening the movable mold 1 and the fixed mold 101. Simultaneously, the ejector rod 205, ear rod 206, and mounting plate 207 also move closer to the mounting plate 201. When the fixing rod 201a blocks the ear rod 206, the return spring 205a is compressed. As the movable mold 1 continues to move closer to the mounting plate 201, the top plate 208 moves out of the interior of the groove 102, pushing the injection molded product attached to the movable mold 1 down, thus realizing the unloading of the injection molded product; when the piston rod at the telescopic end of the cylinder 202 extends, the connecting plate 203 moves away from the mounting plate 201, and the movable mold 1 moves closer to the fixed mold 101, thus realizing the closing of the movable mold 1 and the fixed mold 101. At the same time, the return spring 205a returns to its original position, and the top plate 208 enters the interior of the groove 102.

[0039] Example 3

[0040] Please see Figure 4Based on specific embodiments one and two, an anti-collision component 3 is provided. The anti-collision component 3 includes a connecting block 301, a limiting rod 302 and a spring body 303. By utilizing the characteristics of the spring body 303, the impact force during the mold closing process of the movable mold 1 and the fixed mold 101 is reduced, which protects the movable mold 1 and the fixed mold 101 and also prevents the fixed mold 101 from loosening due to excessive vibration, thus enabling more stable injection molding.

[0041] Specifically, the rectangular array of slots 103 on the side wall of the fixed mold 101 is close to the side of the movable mold 1, and the rectangular array of through holes 103a on the side wall of the fixed mold 101 is away from the movable mold 1. The slots 103 and the through holes 103a are connected. The rectangular array of connecting blocks 301 on the side wall of the movable mold 1 is located close to the fixed mold 101. The side wall of the connecting blocks 301 is connected to a limiting rod 302. The limiting rod 302 passes through the slots 103 and the through holes 103a in sequence. The spring body 303 connected to the side wall of the connecting blocks 301 is sleeved on the peripheral side wall of the limiting rod 302.

[0042] Furthermore, the outer diameter of the connecting block 301 is equal to the inner diameter of the slot 103, and the inner diameter of the through hole 103a is half the inner diameter of the slot 103.

[0043] The operation process of this embodiment is as follows: When the movable mold 1 and the fixed mold 101 are closed, the spring body 303 contacts the inner wall of the slot 103. At this time, the movable mold 1 and the fixed mold 101 are not in contact. The movable mold 1 continues to move closer to the fixed mold 101, and the spring body 303 is compressed until the limiting rod 302 penetrates the through hole 103a. At this time, the movable mold 1 and the fixed mold 101 are in contact, that is, the movable mold 1 and the fixed mold 101 are closed. When the movable mold 1 and the fixed mold 101 are opened, the spring body 303 is reset, the limiting rod 302 moves out of the through hole 103a and the interior of the slot 103, and the movable mold 1 moves away from the fixed plate 101, thus realizing the mold opening.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An injection mold with ejection structure, comprising a movable mold (1), a fixed mold (101) is abutted on the side wall of the movable mold (1), characterized in that: The movable mold (1) is provided with an ejector assembly (2) on its side. The ejector assembly (2) includes a mounting plate (207) located on the side of the movable mold (1). The ejector rods (205) fixed in a rectangular array on the side wall of the mounting plate (207) penetrate the movable mold (1). The four ejector rods (205) are connected together by a top plate (208). A threaded ring (205b) is threaded onto the peripheral side wall of the ejector rod (205). A return spring (205a) connected to the side wall of the threaded ring (205b) is sleeved on the peripheral side wall of the ejector rod (205). A collar (205c) connected to the other end of the return spring (205a) is sleeved on the peripheral side wall of the ejector rod (205). The movable mold (1) is provided with a collision protection component (3) on its side wall. The collision protection component (3) includes a rectangular array of connecting blocks (301) installed on the side wall of the movable mold (1). A limiting rod (302) is fixedly connected to the side wall of the connecting block (301). A spring body (303) connected to the side wall of the connecting block (301) is sleeved on the peripheral side wall of the limiting rod (302). A slot (103) is opened on one side wall of the fixed mold (101). A through hole (103a) is opened on the other side wall of the fixed mold (101) and communicates with the slot (103). The limiting rod (302) passes through the slot (103) and the through hole (103a) in sequence.

2. The injection mold with ejection structure according to claim 1, characterized in that: The sealing ring (102a) provided on the side wall of the movable mold (1) is located on the side closer to the fixed mold (101), and the sealing ring (102a) provided on the side wall of the fixed mold (101) is located on the side closer to the movable mold (1).

3. The injection mold with ejection structure according to claim 2, characterized in that: The fixed mold (101) has ear plates (101a) symmetrically fixed to its two side walls. The ear plates (101a) have symmetrically opened internal thread holes on their side walls. The injection nozzle (101b) opened on the side wall of the fixed mold (101) is located on the side away from the movable mold (1).

4. The injection mold with ejection structure according to claim 1, wherein: The inner wall of the groove (102) opened on the side wall of the movable mold (1) is provided with a sealing ring (102a), and the thickness of the top plate (208) is equal to the inner depth of the groove (102).

5. The injection mold with ejection structure according to claim 1, wherein: The connecting rods (204a) installed in a rectangular array on the side wall of the movable mold (1) are located away from the fixed mold (101). A mold fixing plate (204) is installed between the four connecting rods (204a). The connecting plate (203) installed on the side wall of the mold fixing plate (204) is located away from the placement plate (207).

6. The injection mold with ejection structure according to claim 5, characterized in that: The mounting plate (201) provided on the side of the connecting plate (203) is located away from the mold fixing plate (204). A cylinder (202) is installed through the side wall of the mounting plate (201). The piston rod end of the telescopic end of the cylinder (202) is connected to the side wall of the connecting plate (203). Ear rods (206) are fixedly connected in a rectangular array on the side wall of the mounting plate (207). Fixing rods (201a) are fixedly connected in a rectangular array on the side wall of the mounting plate (201). The positions of the fixing rods (201a) and the ear rods (206) correspond one-to-one.

7. The injection mold with ejection structure according to claim 6, characterized in that: Guide rods (203a) are fixedly connected to the side wall of the connecting plate (203) in a rectangular array, and the guide rods (203a) penetrate the side wall of the mounting plate (201).

8. The injection mold with ejection structure according to claim 1, wherein: The outer diameter of the connecting block (301) is equal to the inner diameter of the slot (103), and the inner diameter of the through hole (103a) is half the inner diameter of the slot (103).

Images