Modified plastic injection mold capable of quickly taking out parts

Abstract

The utility model discloses a modified plastics injection mold of quick spare part, related to modified plastics injection mold technical field, including mould body, the mould body includes bottom plate and lower mould, the lower mould fixed mounting is in the upper surface of bottom plate, the lower mould is provided with the ejector rod in a matched manner, the lubricating assembly is connected with the lower mould to the ejector rod, the lubricating assembly includes the guide hole, the guide hole is set up in the lower surface of lower mould, the guide hole is fixedly installed with self -lubricating bushing, the inner wall of self -lubricating bushing is connected with the circumference lateral surface of ejector rod and slides, the lower end of ejector rod circumference lateral surface is set up with the mounting groove, a plurality of ball bearings are installed with rolling in the mounting groove, the utility model discloses through self -lubricating bushing provides the continuous lubrication, reduces the friction coefficient between self -lubricating bushing and ejector rod, and through the ball bearing, the contact of part ejector rod and self -lubricating bushing changes from surface contact sliding friction to point contact rolling friction, significantly reduces the wear and tear of ejector rod side surface and self -lubricating bushing.

Description

Technical Field

[0001] This utility model relates to the field of modified plastic injection mold technology, and in particular to a modified plastic injection mold that allows for quick part removal. Background Technology

[0002] Modified plastic injection molds are specialized molding tools used to produce modified plastic products. Molten modified plastic is injected into the mold cavity under high pressure, and after cooling, the modified plastic of the desired shape can be obtained. Modified plastic injection molds give modified plastic products a complete shape and precise dimensions through precise cavity structure.

[0003] To improve performance, modified plastics are made by adding materials such as glass fiber, mineral fillers, and flame retardants to engineering plastics. This increases the coefficient of friction between the modified plastic and the mold cavity. To improve demolding efficiency, modified plastic injection molds are equipped with ejection mechanisms to assist in demolding.

[0004] However, the ejector rod of the ejector mechanism and the guide hole of the mold have sliding friction. During the process of ejecting the modified plastic product, the side of the ejector rod and the guide hole wear. Long-term wear will cause the clearance between the ejector rod and the guide hole to increase, causing the ejector rod to wobble. The wobble ejector rod is prone to bending or even breaking due to uneven force during the ejection operation. Utility Model Content

[0005] Given that the ejector rod of the above-mentioned ejection mechanism has sliding friction with the guide hole of the mold, during the process of ejecting the modified plastic product, the side of the ejector rod and the guide hole will wear. Long-term wear will lead to an increase in the fit clearance between the ejector rod and the guide hole, causing the ejector rod to wobble. The wobble ejector rod is prone to bending or even breaking due to uneven force during the ejection operation. Therefore, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a modified plastic injection mold that allows for quick part removal. It provides continuous lubrication through a self-lubricating bushing, reducing the coefficient of friction between the self-lubricating bushing and the ejector pin. Furthermore, it uses ball bearings to change the contact between the ejector pin and the self-lubricating bushing from surface sliding friction to point rolling friction, significantly reducing wear on the side of the ejector pin and the self-lubricating bushing, slowing down the widening of the gap caused by wear, and thus extending the service life of the ejector pin.

[0007] To solve the above technical problems, this utility model provides the following technical solution: a modified plastic injection mold with quick part removal, including a mold body, the mold body including a base plate and a lower mold, the lower mold being fixedly installed on the upper surface of the base plate, the lower mold being equipped with a push rod, and the push rod being connected to the lower mold with a lubrication component; The lubrication assembly includes a guide hole, which is opened on the lower surface of the lower mold. A self-lubricating bushing is fixedly installed in the guide hole. The inner wall of the self-lubricating bushing is slidably connected to the circumferential side of the push rod. An installation groove is opened at the lower end of the circumferential side of the push rod, and a number of balls are rolled in the installation groove.

[0008] As a preferred embodiment of the modified plastic injection mold for quick part removal described in this utility model, the lower surface of the lower mold is provided with a receiving groove, the receiving groove is slidably connected to a base plate, and the ejector rod is connected to the base plate.

[0009] As a preferred embodiment of the modified plastic injection mold for quick part removal described in this utility model, a plurality of hydraulic cylinders are fixedly installed on the upper surface of the base plate, and the upper ends of the plurality of hydraulic cylinders are fixedly connected to the lower surface of the base plate.

[0010] As a preferred embodiment of the modified plastic injection mold for quick part removal described in this utility model, the substrate is provided with a through hole, the lower surface of the push rod is fixedly connected to an insert rod, the peripheral side of the insert rod is fixedly connected to a guide protrusion, the cross-section of the insert rod and the guide protrusion combined is adapted to the cross-section of the through hole, and the insert rod and the guide protrusion are slidably connected to the through hole.

[0011] In a preferred embodiment of the modified plastic injection mold for quick part removal described in this utility model, the base plate and the insert rod are connected by a limit assembly. The limiting component includes an auxiliary plate, which is fixedly connected to the lower surface of the base plate. A push-pull rod is slidably connected to the auxiliary plate. A push-pull plate is fixedly connected to one end of the push-pull rod, and a wedge is fixedly connected to the other end of the push-pull rod. A limiting groove is formed on the peripheral side of the insertion rod, and the wedge is slidably connected to the limiting groove.

[0012] As a preferred embodiment of the modified plastic injection mold for quick part removal described in this utility model, the push-pull rod is fitted with a spring, one end of the spring is fixedly connected to the push-pull plate, and the other end of the spring is fixedly connected to the auxiliary plate.

[0013] The beneficial effects of this utility model are: 1. This utility model provides continuous lubrication through a self-lubricating bushing, reducing the coefficient of friction between the self-lubricating bushing and the push rod. Furthermore, by using ball bearings, it changes part of the contact between the push rod and the self-lubricating bushing from surface sliding friction to point rolling friction, significantly reducing wear on the side of the push rod and the self-lubricating bushing, slowing down the widening of the gap caused by wear, and thus extending the service life of the push rod.

[0014] 2. This utility model limits the insertion rod and the top rod by inserting a movable wedge into the limiting groove. When the top rod needs to be replaced, the operator can release the limitation on the insertion rod by moving the wedge, and the top rod can be quickly removed for replacement, which shortens the maintenance time and improves the maintenance efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of a modified plastic injection mold for quick part removal according to the present invention.

[0016] Figure 2 This is a partial cross-sectional view of a modified plastic injection mold for quick part removal according to the present invention.

[0017] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the lubrication and limiting components of a modified plastic injection mold for quick part removal according to this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Mold body; 101. Base plate; 102. Lower mold; 103. Ejector pin; 2. Lubrication assembly; 201. Guide hole; 202. Self-lubricating bushing; 203. Mounting groove; 204. Ball bearing; 3. Receiving groove; 4. Base plate; 5. Hydraulic cylinder; 6. Insertion hole; 7. Insertion rod; 8. Guide protrusion; 9. Limiting assembly; 901. Auxiliary plate; 902. Push-pull rod; 903. Push-pull plate; 904. Wedge block; 905. Limiting groove; 10. Spring. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1:

[0021] Reference Figures 1-3This is the first embodiment of the present invention, which provides a modified plastic injection mold that can quickly remove parts. It includes a mold body 1, which is used to shape the molten modified plastic into the required shape. The mold body 1 includes a base plate 101 and a lower mold 102. The lower mold 102 has a cavity for accommodating the modified plastic. The lower mold 102 is fixedly installed on the upper surface of the base plate 101. The lower mold 102 is equipped with an ejector rod 103, which is responsible for ejecting the cooled and shaped modified plastic out of the cavity. The ejector rod 103 is connected to the lower mold 102 by a lubrication component 2. The lubrication assembly 2 includes a guide hole 201, which guides the movement of the ejector rod 103. The guide hole 201 is located on the lower surface of the lower mold 102, extends upward and communicates with the cavity. A self-lubricating bushing 202 is fixedly installed inside the guide hole 201. The inner wall of the self-lubricating bushing 202 is slidably connected to the peripheral side of the ejector rod 103. The self-lubricating bushing 202 is made of graphite material and can provide continuous lubrication for the ejector rod 103 to reduce the coefficient of friction. A mounting groove 203 is provided at the lower end of the peripheral side of the ejector rod 103. The mounting groove 203 provides the necessary space for the installation of the balls 204. Several balls 204 are rolled in the mounting groove 203. The balls 204 change part of the contact between the ejector rod 103 and the self-lubricating bushing 202 from surface contact sliding friction to point contact rolling friction, which can significantly reduce the wear between the side of the ejector rod 103 and the self-lubricating bushing 202.

[0022] The lower surface of the lower mold 102 is provided with a receiving groove 3, and the receiving groove 3 is slidably connected to the substrate 4. The push rod 103 is connected to the substrate 4. The receiving groove 3 plays a guiding role and can help the substrate 4 move up and down stably.

[0023] Several hydraulic cylinders 5 are fixedly installed on the upper surface of the base plate 101. The upper ends of the hydraulic cylinders 5 are fixedly connected to the lower surface of the base plate 4. The hydraulic cylinders 5 are power sources that provide power for the ejection and resetting of the push rod 103. Example 2:

[0024] Reference Figures 2-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: the substrate 4 is provided with a through hole 6, and the lower surface of the top rod 103 is fixedly connected to the insertion rod 7. Inserting the insertion rod 7 into the insertion hole 6 can quickly complete the rough installation of the top rod 103. The peripheral side of the insertion rod 7 is fixedly connected to the guide protrusion 8. The cross-section of the insertion rod 7 and the guide protrusion 8 is adapted to the cross-section of the insertion hole 6. The insertion rod 7 and the guide protrusion 8 are slidably connected to the insertion hole 6 after being combined. Through the guide protrusion 8, the insertion rod 7 and the insertion hole 6 can be quickly positioned, thereby aligning the limiting groove 905 with the wedge block 904.

[0025] The top rod 103 is connected to the base plate 4 by a limiting assembly 9; The limiting component 9 includes an auxiliary plate 901, which is fixedly connected to the lower surface of the base plate 4. A push-pull rod 902 is slidably connected to the auxiliary plate 901. The auxiliary plate 901 guides the push-pull rod 902 and assists in the stable movement of the push-pull rod 902. A push-pull plate 903 is fixedly connected to one end of the push-pull rod 902. The push-pull plate 903 enlarges one end of the push-pull rod 902 for easy manual operation. A wedge block 904 is fixedly connected to the other end of the push-pull rod 902. A limiting groove 905 is opened on the peripheral side of the insertion rod 7. The wedge block 904 is slidably connected to the limiting groove 905. When the wedge block 904 is inserted into the limiting groove 905, the top rod 103 is fixed on the base plate 4. When the wedge block 904 is separated from the limiting groove 905, the limiting of the top rod 103 is released. At this time, the top rod 103 can be disassembled and replaced.

[0026] The push-pull rod 902 is fitted with a spring 10. One end of the spring 10 is fixedly connected to the push-pull plate 903, and the other end of the spring 10 is fixedly connected to the auxiliary plate 901. The spring 10 provides a pre-tightening force, so that the wedge block 904 is firmly inserted into the limiting groove 905, ensuring the reliability of the limiting of the top rod 103.

[0027] In use, the hydraulic cylinder 5 pushes the base plate 4 upward, and then the ejector rod 103 passes through the guide hole 201 and enters the cavity of the lower mold 102, ejecting the modified plastic that has cooled and formed in the cavity. After ejection, the hydraulic cylinder 5 drives the ejector rod 103 to reset, preparing for the next ejection operation.

[0028] During the up-and-down movement of the push rod 103 within the guide hole 201, the self-lubricating bushing 202 made of graphite material provides continuous lubrication for the push rod 103, reducing the coefficient of friction between the self-lubricating bushing 202 and the push rod 103. Furthermore, during the up-and-down movement of the push rod 103, the ball bearings 204 change part of the contact between the push rod 103 and the self-lubricating bushing 202 from surface contact sliding friction to point contact rolling friction, significantly reducing the wear between the side of the push rod 103 and the self-lubricating bushing 202, which can slow down the widening of the gap caused by wear and extend the service life of the push rod 103.

[0029] When the top rod 103 needs to be replaced, manually operate the push-pull plate 903 to move the push-pull rod 902 with the wedge block 904. The wedge block 904 separates from the limiting groove 905. At this time, the spring 10 is compressed. Then, pull the top rod 103 upward to separate the insertion rod 7 from the insertion hole 6, thus completing the disassembly of the top rod 103.

[0030] Then, align the insertion rod 7 and guide protrusion 8 of the new push rod 103 with the insertion hole 6, and insert the insertion rod 7 and guide protrusion 8 into the insertion hole 6. When the lower surface of the push rod 103 abuts against the upper surface of the base plate 4, release the push-pull plate 903. The spring 10 returns to its original state and drives the push-pull plate 903, push-pull rod 902, and wedge 904 to move, so that the wedge 904 is inserted into the limiting groove 905, thereby completing the limiting of the new push rod 103 and shortening the maintenance time.

[0031] The remaining structure is the same as that in Example 1.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A modified plastic injection mold for quick part removal, characterized in that: The mold body (1) includes a base plate (101) and a lower mold (102). The lower mold (102) is fixedly installed on the upper surface of the base plate (101). The lower mold (102) is equipped with a push rod (103). The push rod (103) is connected to the lower mold (102) by a lubrication assembly (2). The lubrication assembly (2) includes a guide hole (201) which is opened on the lower surface of the lower mold (102). A self-lubricating bushing (202) is fixedly installed in the guide hole (201). The inner wall of the self-lubricating bushing (202) is slidably connected to the circumferential side of the push rod (103). An installation groove (203) is opened at the lower end of the circumferential side of the push rod (103). A plurality of balls (204) are rolled in the installation groove (203).

2. The modified plastic injection mold for quick part removal according to claim 1, characterized in that: The lower surface of the lower mold (102) is provided with a receiving groove (3), and the receiving groove (3) is slidably connected to the base plate (4). The push rod (103) is connected to the base plate (4).

3. A modified plastic injection mold for quick part removal according to claim 1, characterized in that: A plurality of hydraulic cylinders (5) are fixedly installed on the upper surface of the base plate (101), and the upper ends of the plurality of hydraulic cylinders (5) are fixedly connected to the lower surface of the base plate (4).

4. A modified plastic injection mold for quick part removal according to claim 2, characterized in that: The substrate (4) has a through hole (6), and the lower surface of the top rod (103) is fixedly connected to the insertion rod (7). The peripheral side of the insertion rod (7) is fixedly connected to the guide protrusion (8). The cross-section of the insertion rod (7) and the guide protrusion (8) is adapted to the cross-section of the insertion hole (6). The insertion rod (7) and the guide protrusion (8) are slidably connected to the insertion hole (6).

5. A modified plastic injection mold for quick part removal according to claim 4, characterized in that: The top rod (103) is connected to the base plate (4) by a limiting component (9). The limiting component (9) includes an auxiliary plate (901), which is fixedly connected to the lower surface of the base plate (4). The auxiliary plate (901) is slidably connected to a push-pull rod (902). One end of the push-pull rod (902) is fixedly connected to a push-pull plate (903), and the other end of the push-pull rod (902) is fixedly connected to a wedge (904). A limiting groove (905) is opened on the circumferential side of the insertion rod (7), and the wedge (904) is slidably connected to the limiting groove (905).

6. A modified plastic injection mold for quick part removal according to claim 5, characterized in that: The push-pull rod (902) is fitted with a spring (10), one end of the spring (10) is fixedly connected to the push-pull plate (903), and the other end of the spring (10) is fixedly connected to the auxiliary plate (901).

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