Plastic shell mold with limiting structure

Abstract

The utility model discloses a plastic shell mould with a limit structure, which relates to the technical field of shell moulds, and comprises a static mould and a movable mould, the movable mould is positioned on one side of the static mould, one side of the static mould is provided with an injection molding groove, and one side of the static mould close to the injection molding groove is fixedly connected with four limit rods. A convex block is fixedly connected to the side, close to the injection molding groove, of the movable mold, limiting grooves are formed in the positions, opposite to the four limiting rods, of one side of the movable mold, the arc surfaces of the limiting rods are slidably connected with the inner walls of the limiting grooves, positioning structures are arranged on the two sides of the static mold, and each positioning structure comprises two fixing blocks; according to the plastic shell mold with the limiting structure, the effect of further positioning the movable mold and the static mold of the plastic shell is achieved, and the problems that due to the fact that a limiting rod is moved, inserted and pulled out of a limiting groove for multiple times, certain loss is caused, the attaching precision between the movable mold and the static mold is reduced, and the specification precision of the plastic shell is reduced after injection molding are solved.

Description

Technical Field

[0001] This utility model relates to the field of shell mold technology, specifically a plastic shell mold with a limiting structure. Background Technology

[0002] A shell mold is a mold used to injection mold plastic shells. The injection molding of shells requires the mold to have high precision, so a limiting structure is needed to fit and limit the mold. It is generally composed of a stationary mold, injection groove, limiting rod, moving mold, protrusion, limiting groove, vent, injection port, etc.

[0003] The aforementioned and existing related technologies often have the following drawbacks: the movement of the moving mold causes the limiting rod to insert into the limiting groove, resulting in a close fit and positioning between the stationary and moving molds. However, during the repeated movement of the limiting rod driven by the moving mold, the repeated insertion and removal between the limiting rod and the limiting groove will cause some wear. Over time, the shape of the limiting rod will change due to material consumption, reducing the degree of fit between the limiting rod and the limiting groove, and consequently reducing the fitting accuracy between the stationary and moving molds. This leads to the problem of dimensional deviations in the injection molding of plastic shells due to the reduced fitting accuracy.

[0004] Therefore, we propose a plastic shell mold with a limiting structure. Utility Model Content

[0005] The purpose of this invention is to provide a plastic shell mold with a limiting structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plastic shell mold with a limiting structure, comprising a stationary mold and a moving mold, wherein the moving mold is located on one side of the stationary mold, an injection groove is provided on one side of the stationary mold, four limiting rods are fixedly connected to the side of the stationary mold near the injection groove, a protrusion is fixedly connected to the side of the moving mold near the injection groove, and limiting grooves are provided on one side of the moving mold relative to the four limiting rods, the arc surface of the limiting rod is slidably connected to the inner wall of the limiting groove, positioning structures are provided on both sides of the stationary mold, the positioning structures include two fixing blocks, the sides of the two fixing blocks close to each other are fixedly connected to the stationary mold, a positioning hole is provided on one side of the fixing block, and fixing plates are fixedly connected to both sides of the moving mold, a positioning rod is fixedly connected to the side of the fixing plate near the fixing block, the surface of the positioning rod is slidably connected to the inner wall of the positioning hole.

[0007] The aforementioned components achieve the following effect: they further position the moving and stationary molds of the plastic shell, thereby minimizing the need for the limit rod to move and insert into the limit slot multiple times, which would cause wear and tear and reduce the fitting accuracy between the moving and stationary molds, leading to a decrease in the dimensional accuracy of the plastic shell after injection molding.

[0008] Preferably, a trapezoidal block is fixedly connected to one side of the positioning rod, and the side of the trapezoidal block away from the positioning rod is slidably connected to the inner wall of the positioning hole.

[0009] The effect achieved by the above components is that the trapezoidal block slides from the inner wall of the positioning hole, causing the positioning rod to be inserted. The trapezoidal block plays the role of guiding the positioning rod to a position and reducing wear.

[0010] Preferably, the upper surface of the positioning rod is provided with an insertion hole, the upper surface of the fixing block is fixedly connected with a rectangular frame, the lower surface of the fixing block is provided with a through hole, the through hole is connected to the positioning hole, the upper surface of the rectangular frame is threaded with a screw rod, the arc dimension of the screw rod is adapted to the inner wall dimension of the insertion hole, and the arc surface of the screw rod is slidably connected to the inner wall of the through hole.

[0011] The effect achieved by the above components is that the screw is inserted into the through hole and positioning hole through the rectangular frame, and the screw temporarily limits the moving mold and stationary mold after bonding to facilitate the overall handling.

[0012] Preferably, a sphere is fixedly connected to the upper end of the screw, and the sphere has a plurality of grooves evenly distributed on its arc surface.

[0013] The aforementioned components achieve the following effect: by using the groove to rotate the sphere, the screw is driven to rotate. The sphere facilitates the driving of the screw while minimizing the risk of personnel bumping into the screw and causing danger.

[0014] Preferably, the upper surface of the stationary mold is provided with a coating structure, the coating structure includes an oil box, the lower surface of the oil box is fixedly connected to the stationary mold, the arc surface of the oil box is connected to two oil supply pipes, and the other end of each of the two oil supply pipes is connected to a sponge ring.

[0015] The aforementioned components achieve the following effect: they lubricate the limiting rod by working together to apply lubricant to the limiting rod, making it easier for the limiting rod to slide into the limiting groove and further reducing wear, thereby increasing the service life of the device.

[0016] Preferably, a ring is fixedly connected to the arc surface of each of the two sponge rings, a U-shaped rod is fixedly connected to the arc surface of the two rings, and a support plate is fixedly connected to the arc surface of the oil box.

[0017] The effect achieved by the above components is that the U-shaped rod moves the sponge ring to the support plate with the help of the ring, and the U-shaped rod facilitates the simultaneous movement of the two sponge rings.

[0018] Preferably, the inner wall of the U-shaped rod is provided with a support groove, the inner wall of the support groove is slidably connected to the support plate, and the oil delivery pipe is an elastic pipe.

[0019] The aforementioned components achieve the following effect: by using an oil delivery tube that is an elastic tube, the oil can be applied to the distant limiting rod without affecting its own oil delivery and reducing the placement space.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention, through the establishment of a positioning structure, achieves further positioning between the moving and stationary molds of the plastic shell. The positioning rod and positioning hole work together to achieve insertion and positioning again. Furthermore, the trapezoidal block and the wear caused by the limiting rod allow it to continue moving, resulting in dual positioning between the moving and stationary molds. This significantly improves the tightness of the fit between them, thereby enhancing the injection molding precision of the plastic shell. This invention also incorporates a lubrication structure to apply lubricant to the limiting rod. The cooperation of various components to apply lubricant to the limiting rod allows for smoother insertion into the limiting groove, further reducing wear and extending the lifespan of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This utility model Figure 1 A partial structural diagram;

[0024] Figure 3 This is a partial side view of the structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the circular part of this utility model.

[0026] In the diagram: 1. Static mold; 2. Moving mold; 3. Injection groove; 4. Limiting rod; 5. Protrusion; 6. Positioning structure; 601. Fixing block; 602. Positioning hole; 603. Fixing plate; 604. Positioning rod; 605. Trapezoidal block; 606. Insertion hole; 607. Rectangular frame; 608. Through hole; 609. Screw; 610. Sphere; 611. Groove; 7. Coating structure; 71. Oil box; 72. Oil pipe; 73. Sponge ring; 74. Ring; 75. U-shaped rod; 76. Support groove; 77. Support plate; 8. Limiting groove. Detailed Implementation

[0027] 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 protection scope of the present utility model.

[0028] Please see Figure 1 and Figure 2 as well as Figure 3 This utility model provides a technical solution: a plastic shell mold with a limiting structure, including a stationary mold 1 and a moving mold 2. The moving mold 2 is located on one side of the stationary mold 1. An injection groove 3 is provided on one side of the stationary mold 1. Four limiting rods 4 are fixedly connected to the side of the stationary mold 1 near the injection groove 3. A protrusion 5 is fixedly connected to the side of the moving mold 2 near the injection groove 3. Limiting grooves 8 are provided on one side of the moving mold 2 relative to the four limiting rods 4. The arc surface of the limiting rods 4 is slidably connected to the inner wall of the limiting groove 8. Positioning structures 6 are provided on both sides of the stationary mold 1, achieving further... The positioning effect between the moving mold 2 and the stationary mold 1 of the plastic shell is to minimize the need for the limiting rod 4 to move and insert into the limiting groove 8 repeatedly, which would cause wear and reduce the fitting accuracy between the moving mold 2 and the stationary mold 1, resulting in a decrease in the dimensional accuracy of the plastic shell after injection molding. The upper surface of the stationary mold 1 is provided with a coating structure 7, which achieves the effect of coating and lubricating the limiting rod 4. With the cooperation of various components, the limiting rod 4 is coated with lubricating oil, which makes the limiting rod 4 insert into the limiting groove 8 more smoothly, further reducing wear and thus improving the service life of the device.

[0029] The specific settings and functions of its positioning structure 6 and application structure 7 will be explained below.

[0030] like Figure 2 and Figure 3 As shown, the positioning structure 6 includes two fixing blocks 601. The two fixing blocks 601 are fixedly connected to the stationary mold 1 on the side closest to each other. A positioning hole 602 is provided on one side of the fixing block 601. Fixing plates 603 are fixedly connected to both sides of the moving mold 2. A positioning rod 604 is fixedly connected to the side of the fixing plate 603 closest to the fixing block 601. The surface of the positioning rod 604 is slidably connected to the inner wall of the positioning hole 602. A trapezoidal block 605 is fixedly connected to one side of the positioning rod 604. The side of the trapezoidal block 605 away from the positioning rod 604 is slidably connected to the inner wall of the positioning hole 602. The trapezoidal block 605 slides from the inner wall of the positioning hole 602 to drive the positioning rod 604 to be inserted. The trapezoidal block 605 plays the role of guiding the position of the positioning rod 604 and reducing wear.

[0031] The upper surface of the positioning rod 604 has an insertion hole 606. A rectangular frame 607 is fixedly connected to the upper surface of the fixing block 601. The lower surface of the fixing block 601 has a through hole 608, which communicates with the positioning hole 602. A screw 609 is threaded through the upper surface of the rectangular frame 607. The arc dimension of the screw 609 matches the inner wall dimension of the insertion hole 606. The arc surface of the screw 609 is slidably connected to the inner wall of the through hole 608. The screw 609 is inserted through the rectangular frame 607. The screw 609 is inserted into the through hole 608 and the positioning hole 602. It temporarily limits the movement of the mold 2 and the stationary mold 1 after they are attached, so as to facilitate the overall handling. The upper end of the screw 609 is fixedly connected to a ball 610. The arc surface of the ball 610 is evenly provided with several grooves 611. By rotating the ball 610 with the help of the grooves 611, the screw 609 is driven to rotate. The ball 610 plays a role in facilitating the driving of the screw 609 while minimizing the risk of personnel bumping into the screw 609 and causing certain dangers.

[0032] like Figure 3 and Figure 4 As shown, the coating structure 7 includes an oil box 71. The lower surface of the oil box 71 is fixedly connected to the stationary mold 1. The arc surface of the oil box 71 is connected to two oil supply pipes 72. The other end of each of the two oil supply pipes 72 is connected to a sponge ring 73. The arc surface of each of the two sponge rings 73 is fixedly connected to a ring 74. The arc surface of each of the two rings 74 is fixedly connected to a U-shaped rod 75. The arc surface of the oil box 71 is fixedly connected to a support plate 77. The U-shaped rod 75 moves the sponge rings 73 to the support plate 77 with the help of the rings 74. The U-shaped rod 75 facilitates the simultaneous movement of the two sponge rings 73. The inner wall of the U-shaped rod 75 is provided with a support groove 76. The inner wall of the support groove 76 is slidably connected to the support plate 77. The oil supply pipes 72 are elastic tubes. By using the elastic oil supply pipes 72, the coating of the distant limiting rod 4 can be achieved without affecting its own oil supply and reducing the placement space.

[0033] Working principle: When injection molding a plastic shell is required, the stationary mold 1 is first hoisted into the injection molding machine. Then, the infusion pipe and air pipe are connected to the stationary mold 1. Next, the ball 610 is rotated away from the positioning rod 604 using the groove 611. The ball 610 facilitates the driving of the screw 609 while minimizing the risk of personnel bumping into the screw 609 and causing danger. The screw 609 rises within the rectangular frame 607 via the ball 610. At this point, the screw 609 disengages from the inner walls of the through hole 608 and the insertion hole 606. The screw 609 temporarily limits the position of the mating moving mold 2 and stationary mold 1, facilitating overall handling. The moving mold 2 is then connected to the injection molding machine, and the injection molding machine fills the injection tank 3 through the infusion pipe and injection port. The protrusion 5 forms the outer shell shape, and then the moving mold 2 is driven by the injection molding machine to separate from the stationary mold 1. The limiting rod 4 slides and separates from the inner wall of the limiting groove 8. The fixing plate 603 then drives the positioning rod 604 to separate from the inner wall of the positioning hole 602. At this time, the outer shell is removed after injection molding. The injection molding machine drives the moving mold 2 to approach the stationary mold 1 again. The trapezoidal block 605 slides from the positioning hole 602 and drives the positioning rod 604 to insert into the positioning hole 602. The trapezoidal block 605 plays the role of guiding the position of the positioning rod 604 and reducing wear. The limiting groove 8 of the moving mold 2 then slides from the inner wall of the limiting rod 4. Through the dual positioning of the positioning rod 604, the trapezoidal block 605 and the limiting rod 4, the wear of the limiting rod 4 itself is effectively reduced, which affects the tightness of the fit, thereby improving the dimensional accuracy of the plastic shell after injection molding.

[0034] When it is necessary to apply lubricant to the limiting rod 4, the U-shaped rod 75 is moved to disengage the support groove 76 from the support plate 77. The ring 74 then moves the sponge ring 73 to the arc surface of the limiting rod 4. During the movement of the sponge ring 73, the oil supply pipe 72 is stretched. The lubricant is applied to the limiting rod 4 through the lubricant soaked in the sponge ring 73, making it smoother when the limiting rod 4 is inserted into the limiting groove 8. After the application is completed, the U-shaped rod 75 is moved again to move the support groove 76 to the upper surface of the support plate 77. The U-shaped rod 75 facilitates the simultaneous movement of the two sponge rings 73. At this time, the oil supply pipe 72 unfolds and the internal space increases. With the help of the elastic oil supply pipe 72, the oil supply pipe 72 can apply lubricant to the distant limiting rod 4 without affecting its own oil supply and reducing the placement space. Thus, the lubricant can be soaked into the sponge ring 73 again with the help of the oil box 71 for the next use.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic shell mold with a limiting structure, comprising a static mold (1) and a dynamic mold (2), characterized in that: The movable mold (2) is located on one side of the static mold (1), one side of the static mold (1) is provided with an injection slot (3), and the side of the static mold (1) close to the injection slot (3) is fixedly connected with four limiting rods (4). The side of the movable mold (2) close to the injection slot (3) is fixedly connected with a protruding block (5), and the position of the movable mold (2) relative to the four limiting rods (4) is provided with a limiting groove (8). The circular arc surface of the limiting rod (4) is in sliding connection with the inner wall of the limiting groove (8), and the two sides of the static mold (1) are provided with a positioning structure (6). The positioning structure (6) comprises two fixed blocks (601), and the side of the two fixed blocks (601) close to each other is fixedly connected with the static mold (1). The side of the fixed block (601) is provided with a positioning hole (602), and the two sides of the movable mold (2) are fixedly connected with a fixed plate (603). The side of the fixed plate (603) close to the fixed block (601) is fixedly connected with a positioning rod (604), and the surface of the positioning rod (604) is in sliding connection with the inner wall of the positioning hole (602).

2. The plastic shell mold with a limiting structure according to claim 1, wherein: The side of the positioning rod (604) is fixedly connected with a trapezoidal block (605), and the side of the trapezoidal block (605) away from the positioning rod (604) is in sliding connection with the inner wall of the positioning hole (602).

3. The plastic shell mold with a limiting structure according to claim 1, wherein: The upper surface of the positioning rod (604) is provided with a plug hole (606), the upper surface of the fixed block (601) is fixedly connected with a rectangular frame (607), the lower surface of the fixed block (601) is provided with a perforated hole (608), the perforated hole (608) is in communication with the positioning hole (602), and the upper surface of the rectangular frame (607) is threaded through with a screw rod (609). The arc size of the screw rod (609) is matched with the inner wall size of the plug hole (606), and the arc surface of the screw rod (609) is in sliding connection with the inner wall of the perforated hole (608).

4. The plastic shell mold with a limiting structure according to claim 3, wherein: The upper end of the screw rod (609) is fixedly connected with a spherical ball (610), and the arc surface of the spherical ball (610) is uniformly provided with a plurality of grooves (611).

5. The plastic shell mold with a limiting structure according to claim 1, wherein: The upper surface of the static mold (1) is provided with a smearing structure (7), the smearing structure (7) comprises an oil box (71), the lower surface of the oil box (71) is fixedly connected with the static mold (1), the arc surface of the oil box (71) is in communication with two oil conveying pipes (72), and the other ends of the two oil conveying pipes (72) are in communication with sponge rings (73).

6. The plastic shell mold with a limiting structure according to claim 5, wherein: The arc surface of the two sponge rings (73) is fixedly connected with a circular ring (74), and the arc surface of the two circular rings (74) is fixedly connected with a U-shaped rod (75). The arc surface of the oil box (71) is fixedly connected with a support plate (77).

7. The plastic shell mold with a limiting structure according to claim 6, wherein: The inner wall of the U-shaped rod (75) is provided with a supporting groove (76), the inner wall of the supporting groove (76) is in sliding connection with the support plate (77), and the oil conveying pipe (72) is a elastic pipe.

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