Injection mold with fine positioning function

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold with fine positioning, which comprises a mold seat, elastic fixing rods are fixedly connected to corners around the upper surface of the mold seat, an injection disc is arranged on the upper surface of the mold seat, and the lower surface of the injection disc is detachably connected with the top ends of the elastic fixing rods. A first transmission cavity is formed in the mold base, a transmission pressing block is arranged in the first transmission cavity, the top end of the transmission pressing block is fixedly connected with the bottom end of the injection molding disc, positioning blocks are vertically and fixedly arranged at the center positions of the two sides of the mold base, and assembling holes are vertically formed in the upper ends of the interiors of the positioning blocks. The positioning rod is accurately inserted into the positioning hole of the injection molding pressing plate during mold closing to ensure that the upper part and the lower part of the mold are accurately aligned and are retracted to protect the mold after mold opening, so that the service life of the positioning structure is effectively prolonged, the injection molding positioning accuracy is ensured, the mounting difficulty is reduced, and the injection molding quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with precise positioning. Background Technology

[0002] Injection molds are tools used in the injection molding process, typically consisting of a mold base, mold core, and mold cavity. They play a crucial role in the plastics manufacturing industry, injecting molten plastic raw materials into the mold cavity, where they cool and form the desired plastic product.

[0003] Currently, injection molds generally consist of two main parts: a moving mold and a fixed mold. The moving mold is movable and installed on the moving platen of the injection molding machine, while the fixed mold is installed on the fixed platen of the injection molding machine. When the injection molding machine is working, the moving mold will approach the fixed mold, and they close to form the cavity and gating system. When the moving mold and the fixed mold close, precise positioning is usually achieved by the engagement between the positioning rod and the positioning hole. However, the positioning rods of existing injection molds are usually exposed to the outside world and are easily impacted by external objects during the use of the injection mold, which causes the positioning rods to deform. Therefore, it is difficult to engage with the positioning hole during positioning, which reduces the accuracy of the injection mold during use. To address this, we propose an injection mold with precise positioning. Utility Model Content

[0004] The main purpose of this invention is to provide an injection mold with precise positioning, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection mold with precise positioning, including a mold base, wherein elastic fixing rods are fixedly connected to the four corners of the upper surface of the mold base, an injection plate is provided on the upper surface of the mold base, and the lower surface of the injection plate is detachably connected to the top of the elastic fixing rods, a first transmission cavity is provided inside the mold base, a transmission pressure block is provided inside the first transmission cavity, and the top of the transmission pressure block is fixedly connected to the bottom of the injection plate, a positioning block is vertically fixed at the center of both sides of the mold base, an assembly hole is vertically provided at the upper end of the positioning block, a positioning rod is slidably nested in the cavity of the assembly hole, a second transmission cavity is provided inside the positioning block below the assembly hole, a first trapezoidal block is provided on one side of the second transmission cavity, and the top of the first trapezoidal block is fixedly connected to the bottom of the positioning rod, a spring is surrounded on the bottom surface of the positioning rod, and the bottom of the spring abuts against the first trapezoidal block, and a transmission rod is slidably nested on both sides of the bottom of the first transmission cavity and at positions corresponding to the second transmission cavity.

[0006] Preferably, the transmission rod includes a second trapezoidal block, a connecting rod, and a third trapezoidal block. The connecting rod is laterally slidably nested on both sides of the bottom end of the first transmission cavity and at positions corresponding to the second transmission cavity. The connecting rod is fixedly connected to the second trapezoidal block on one side of the first transmission cavity, and the second trapezoidal block is slidably attached to one side of the bottom end of the first trapezoidal block. The connecting rod is fixedly connected to the third trapezoidal block on one side of the second trapezoidal block, and one side of the third trapezoidal block is slidably attached to both sides of the bottom end of the transmission pressure block.

[0007] Preferably, the bottom ends of the transmission pressure block are provided with inclined surfaces that are adapted to the third trapezoidal block.

[0008] Preferably, positioning slots adapted to the positioning blocks are provided on both sides of the injection molding disc at positions corresponding to the positioning blocks.

[0009] Preferably, guide pillars are fixedly connected to the center positions of both sides of the upper surface of the mold base, and a top cover is fixedly connected to the top of the guide pillars. A hydraulic cylinder is detachably nested at the center position of the upper surface of the top cover, and an injection molding plate is detachably connected to the power output end of the hydraulic cylinder. The injection molding plate is slidably sleeved on both sides of the guide pillar surface.

[0010] Preferably, the injection molding plate has positioning blocks fixedly connected to both sides corresponding to the positioning block, and the lower surface of the positioning block has positioning holes adapted to the positioning rod.

[0011] Preferably, an injection hole is provided on one side of the injection molding plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model utilizes a positioning block, an elastic fixing rod, a transmission pressure block, a spring, and a transmission rod composed of a second trapezoidal block, a connecting rod, and a third trapezoidal block in cooperation with each other. During injection molding, as the injection pressure plate presses down, the injection disc moves downward, causing the transmission pressure block to press down. The downward press of the transmission pressure block, due to the cooperation between its bottom inclined surface and the third trapezoidal block, causes the third trapezoidal block to move laterally along the connecting rod, thereby causing the second trapezoidal block to slide within the first transmission cavity. The sliding of the second trapezoidal block pushes the first trapezoidal block upward within the second transmission cavity, thus... The movable positioning rod rises within the assembly hole inside the fixed block. When the mold closes, the positioning rod can accurately insert into the corresponding positioning hole of the injection platen, ensuring precise alignment of the upper and lower parts of the injection mold. When the mold separates, the second trapezoidal block releases the pushing force on the first trapezoidal block, and under the reaction of the spring, it drives the positioning rod to retract into the positioning block, thus preventing the positioning rod from being exposed to the outside. During transportation, handling, and processing, it can effectively prevent the positioning rod from being impacted and deformed, effectively improving the positioning accuracy during injection molding and ensuring injection quality.

[0014] 2. This utility model utilizes a combination of positioning blocks, positioning slots, elastic connecting rods, and guide pillars. During the installation of the injection platen and injection pressure plate, the engagement between the positioning blocks and positioning slots allows the injection platen to be quickly and accurately fixed to the mold base, effectively reducing installation difficulty and ensuring injection accuracy. The guide pillars limit the movement of the injection pressure platen, ensuring it moves along a fixed trajectory and preventing deviation during injection, further guaranteeing injection accuracy. When the two are closed, the elastic connecting rods apply an outward pushing force to the injection platen, ensuring a tight fit and sealing during injection, thus improving injection quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the ventilation component of this utility model;

[0017] Figure 3 This is a sectional view of the top view of the protective shell of this utility model;

[0018] Figure 4 This is a sectional view of the top view of the protective shell of this utility model.

[0019] In the diagram: 1. Mold base; 2. Positioning block; 3. Positioning slot; 4. Elastic fixing rod; 5. Injection plate; 6. Top cover; 7. Injection pressure plate; 8. Hydraulic cylinder; 9. Guide pillar; 10. Transmission pressure block; 11. Inclined surface; 12. First transmission cavity; 13. Transmission rod; 14. Second transmission cavity; 15. First trapezoidal block; 16. Positioning rod; 17. Assembly hole; 18. Positioning block; 19. Positioning hole; 20. Injection hole; 21. Spring; 131. Second trapezoidal block; 132. Connecting rod; 133. Third trapezoidal block. Detailed Implementation

[0020] 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.

[0021] Example

[0022] Please see Figure 1 - Figure 4The injection mold with precise positioning shown in the figure includes a mold base 1. Elastic fixing rods 4 are fixedly connected to the four corners of the upper surface of the mold base 1. An injection disc 5 is provided on the upper surface of the mold base 1, and the lower surface of the injection disc 5 is detachably connected to the top of the elastic fixing rods 4. A first transmission cavity 12 is formed inside the mold base 1. A transmission pressure block 10 is provided inside the first transmission cavity 12, and the top of the transmission pressure block 10 is fixedly connected to the bottom of the injection disc 5. Positioning blocks 2 are vertically fixed at the center positions on both sides of the mold base 1. An assembly hole 17 is vertically formed at the upper end of the positioning block 2. A positioning rod 16 is slidably nested inside the assembly hole 17. A second transmission cavity 14 is formed inside the positioning block 2 below the assembly hole 17. A first trapezoidal block 15 is provided on one side inside the second transmission cavity 14, and the top of the first trapezoidal block 15 is fixedly connected to the bottom of the positioning rod 16. A spring is surrounded on the bottom surface of the positioning rod 16, and the bottom of the spring abuts against the first trapezoidal block 15. A transmission rod 13 is laterally slidably nested on both sides of the bottom of the first transmission cavity 12 and at positions corresponding to the second transmission cavity 14. The elastic fixing rod 4 provides initial support and buffer for the injection plate 5. During the injection process, when the injection plate 5 is subjected to pressure changes, the transmission pressure block 10 transmits the force to the transmission rod 13, thereby driving the positioning rod 16 to accurately rise and fall within the assembly hole 17, ensuring high-precision positioning when the mold is closed, effectively reducing product defects caused by positioning deviations, and improving product quality. The spring setting allows the positioning rod 16 to retract into the positioning block 2 under the action of the spring force after the mold is separated, avoiding the positioning rod 16 from being exposed to impact and deformation during transportation, handling, and non-working states, extending the service life of the mold positioning components, reducing maintenance costs, and ensuring long-term stable operation of the mold.

[0023] The transmission rod 13 includes a second trapezoidal block 131, a connecting rod 132, and a third trapezoidal block 133. The connecting rod 132 is laterally slidably nested on both sides of the bottom end of the first transmission cavity 12, corresponding to positions in the second transmission cavity 14. The connecting rod 132 is fixedly connected to the second trapezoidal block 131 on one side of the first transmission cavity 12, and the second trapezoidal block 131 is slidably fitted to one side of the bottom end of the first trapezoidal block 15. The connecting rod 132 is fixedly connected to the third trapezoidal block 133 on the side opposite to the second trapezoidal block 15. One side of the three trapezoidal blocks 133 slides and fits against the two sides of the bottom end of the transmission pressure block 10. The two sides of the bottom end of the transmission pressure block 10 have inclined surfaces 11 that match the third trapezoidal block 133. When the injection molded disc 5 is displaced by external force, the transmission pressure block 10 moves accordingly. The fit between its bottom inclined surface 11 and the third trapezoidal block 133 causes the connecting rod 132 to slide laterally, thereby driving the second trapezoidal block 131 to push the first trapezoidal block 15, enabling the positioning rod 16 to achieve precise lifting and lowering motion, thus automatically adapting to the positioning requirements during mold closing or opening. This structural design effectively reduces manual intervention, improves the speed and accuracy of positioning adjustments, controls positioning errors within a very small range, ensures the consistency and precision of each mold closing, and thus improves the quality stability and production efficiency of injection molded products.

[0024] The injection molded disc 5 has positioning slots 3 on both sides of the positioning block 2, which are adapted to the positioning block 2. Through the adaptation of the positioning slots 3 on both sides of the injection molded disc 5 to the positioning block 2, the injection molded disc 5 can be quickly and accurately positioned and installed on the mold base 1.

[0025] In this design, guide pillars 9 are fixedly connected to the center positions of both sides of the upper surface of the mold base 1. A top cover 6 is fixedly connected to the top of the guide pillars 9. A hydraulic cylinder 8 is detachably nested at the center position of the upper surface of the top cover 6. An injection molding plate 7 is detachably connected to the power output end of the hydraulic cylinder 8. The injection molding plate 7 is slidably sleeved on the surface of the guide pillars 9 on both sides. Positioning blocks 18 are fixedly connected to both sides of the injection molding plate 7 corresponding to the positioning block 2. The lower surface of the positioning blocks 18 has positioning holes 19 that are adapted to the positioning rod 16. The guide pillars 9 are part of the injection molding plate 7. The up-and-down movement provides a stable and precise guiding path, ensuring that the injection platen 7 can act vertically and smoothly on the injection disc 5 under the drive of the hydraulic cylinder 8, avoiding uneven injection caused by pressure direction deviation. At the same time, the cooperation between the positioning block 18, the positioning rod 16, and the positioning hole 19 enables the upper and lower parts of the mold to be quickly and accurately aligned at the moment of mold closing, controlling the mold closing positioning error within a very small range, effectively improving the dimensional accuracy and quality stability of injection molded products, reducing the defect rate caused by inaccurate positioning, and improving the overall efficiency and effectiveness of injection molding production.

[0026] The injection plate 7 has an injection hole 20 on one side; the injection hole 20 facilitates the injection of molten plastic into the shaping cavity of the injection plate 5 for cooling and shaping.

[0027] It should be noted that this utility model is an injection mold with precise positioning. The injection plate 5 is quickly installed onto the mold base 1 by engaging and positioning the positioning block 2 and the positioning slot 3. The injection pressure plate 7 is connected to the power output end of the hydraulic cylinder 8 on the top cover 6. During operation, the hydraulic cylinder 8 drives the injection pressure plate 7 to move downward, and the guide post 9 limits the injection pressure plate 7 to move downward along a fixed trajectory and come into contact with the injection plate 5. This causes the injection plate 5 to move downward, driving the transmission pressure block 10 to press down, which in turn presses down against the third trapezoidal block 1. The inclined plane 11 of 33 engages with the third trapezoidal block 133, causing the connecting rod 132 to move laterally. This causes the second trapezoidal block 131 to slide in the first transmission cavity 12 and push the first trapezoidal block 15 upward, thereby driving the positioning rod 16 to insert into the positioning hole 19 of the injection pressure plate 7 to achieve precise mold closing and positioning. After the mold separates, the spring causes the positioning rod 16 to retract into the positioning block 2, thus preventing the positioning rod 16 from being exposed to the outside, thereby protecting it, effectively extending its service life, and ensuring the accuracy of the mold connection during injection molding, thereby improving the injection molding quality.

[0028] 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 a process, method, article, or apparatus.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold with precise positioning, comprising a mold base (1), characterized in that: Elastic fixing rods (4) are fixedly connected to the four corners of the upper surface of the mold base (1). An injection plate (5) is provided on the upper surface of the mold base (1), and the lower surface of the injection plate (5) is detachably connected to the top of the elastic fixing rod (4). A first transmission cavity (12) is provided inside the mold base (1). A transmission pressure block (10) is provided inside the first transmission cavity (12), and the top of the transmission pressure block (10) is fixedly connected to the bottom of the injection plate (5). A positioning block (2) is vertically fixed at the center of both sides of the mold base (1). An assembly hole (17) is vertically opened at the upper end of the positioning block (2). A positioning rod (16) is slidably nested inside the assembly hole (17). A second transmission cavity (14) is opened inside the positioning block (2) below the assembly hole (17). A first trapezoidal block (15) is provided on one side inside the second transmission cavity (14). The top of the first trapezoidal block (15) is fixedly connected to the bottom of the positioning rod (16). A spring (21) is surrounded on the bottom surface of the positioning rod (16). The bottom of the spring (21) abuts against the first trapezoidal block (15). A transmission rod (13) is slidably nested on both sides of the bottom of the first transmission cavity (12) at a position corresponding to the second transmission cavity (14).

2. The injection mold with precise positioning according to claim 1, characterized in that: The transmission rod (13) includes a second trapezoidal block (131), a connecting rod (132) and a third trapezoidal block (133). The connecting rod (132) is laterally slidably nested on both sides of the bottom end of the first transmission cavity (12) and at the corresponding position to the second transmission cavity (14). The connecting rod (132) is fixedly connected to the second trapezoidal block (131) on one side of the first transmission cavity (12), and the second trapezoidal block (131) is slidably attached to one side of the bottom end of the first trapezoidal block (15). The connecting rod (132) is fixedly connected to the third trapezoidal block (133) on one side of the second trapezoidal block, and one side of the third trapezoidal block (133) is slidably attached to both sides of the bottom end of the transmission pressure block (10).

3. The injection mold with precise positioning according to claim 1, characterized in that: The transmission pressure block (10) has inclined surfaces (11) on both sides of its bottom end that are adapted to the third trapezoidal block (133).

4. The injection mold with precise positioning according to claim 1, characterized in that: Positioning slots (3) adapted to the positioning block (2) are provided on both sides of the injection molded disc (5) and at positions corresponding to the positioning block (2).

5. The injection mold with precise positioning according to claim 1, characterized in that: Guide pillars (9) are fixedly connected to the center positions on both sides of the upper surface of the mold base (1). A top cover (6) is fixedly connected to the top of the guide pillars (9). A hydraulic cylinder (8) is detachably nested at the center position of the upper surface of the top cover (6). An injection molding plate (7) is detachably connected to the power output end of the hydraulic cylinder (8). The injection molding plate (7) is slidably sleeved on both sides of the guide pillars (9).

6. The injection mold with precise positioning according to claim 5, characterized in that: The injection molding plate (7) and the two sides corresponding to the positioning block (2) are fixedly connected with positioning blocks (18), and the lower surface of the positioning block (18) is provided with positioning holes (19) that are compatible with the positioning rod (16).

7. The injection mold with precise positioning according to claim 5, characterized in that: The injection molding plate (7) has an injection hole (20) on one side.

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