Injection molding mold for key parts of DTMB (Digital Terrestrial Multimedia Broadcasting) system

Abstract

The utility model relates to the technical field of DTMB parts, in particular to an injection molding mold for key parts of a DTMB system, which comprises a fixed mold, a movable mold and a DTMB frequency converter shell mold core embedded in a mold cavity of the movable mold. A plurality of air springs are arranged on the side face, facing the movable mold, of the double-rod I-shaped supporting buffer plate, the free end of each air spring is connected with the interior of the fixed mold, so that the double-rod I-shaped supporting buffer plate elastically abuts against the inner wall of the mounting machine table in a buffering mode, and mounting notch grooves are formed in the two ends of the side face, facing the movable mold, of the fixed mold correspondingly; a hydraulic damper is slidably mounted in each mounting notch groove, the damping end of each hydraulic damper is symmetrically connected with two buffering and force unloading auxiliary wheels, and each buffering and force unloading auxiliary wheel is used for buffering, damping and force unloading in the mounting notch grooves through the hydraulic dampers when the movable mold is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of mold injection, in particular to an injection molding mold for key parts of a DTMB system. Background Art

[0002] As a complete terrestrial digital TV transmission solution, the DTMB system consists of multiple key components to ensure the effective transmission and decoding and playback of data in the entire link from signal transmission to user reception. In the DTMB system, there is an upconverter in the transmitting device and a downconverter in the receiving device; the upconverter converts the modulated baseband signal to a radio frequency band suitable for terrestrial broadcasting (usually VHF or UHF band); the downconverter converts the received radio frequency signal into a baseband signal, and the housings of the upconverter and downconverter are generally produced by injection molding using injection molding molds.

[0003] At present, this type of inverter housing injection molding mold is prone to various types of jitter or vibration when processing the inverter housing (for example, if the mold and the injection molding machine are installed on an uneven or unstable foundation, it will cause shaking when opening the mold, and it may also cause vibration due to uneven force during the mold closing stage). If the vibration buffering of the fixed mold and the movable mold is not performed, this vibration may cause the mold to be inaccurately aligned, affecting the mold closing accuracy, and then causing product size deviation, flash, and other problems, reducing the production quality of the inverter housing.

[0004] After searching, the existing Chinese patent publication number: CN217648826U is a converter housing rapid prototyping injection mold, including an injection molding base; limit rods fixed to the top of both sides of the injection molding base, the limit rods are provided with two groups; a mold; and a clamping mechanism.

[0005] The cited patent document also has the same problem. The fixed mold and the movable mold do not have a vibration buffer structure. Vibration may cause inaccurate mold alignment, affecting the mold clamping accuracy, and further causing product size deviation, flash, and other problems, reducing the production quality of the inverter housing. Utility Model Content

[0006] The utility model aims to provide an injection molding die for key components of a DTMB system in view of the deficiencies in the prior art, and the injection molding die for key components of a DTMB system can well solve the above problems.

[0007] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0008] Provided is an injection molding mold for key components of a DTMB system, comprising a fixed mold and a movable mold and a DTMB inverter housing mold core embedded in a mold cavity of the movable mold, a double-rod I-shaped support buffer plate is elastically embedded on the back side of the fixed mold, a plurality of air springs are arranged on the side of the double-rod I-shaped support buffer plate facing the movable mold, the free end of each of the air springs is connected to the interior of the fixed mold, forming a buffer for the double-rod I-shaped support buffer plate to elastically abut against the inner wall of the mounting machine, mounting notch grooves are provided at both ends of the side of the fixed mold facing the movable mold, a hydraulic damper is slidably installed in each of the mounting notch grooves, the damping end of each of the hydraulic dampers is symmetrically connected to two buffer unloading auxiliary wheels, and each of the buffer unloading auxiliary wheels is in the mounting notch groove through the hydraulic damper to provide buffering and shock-absorbing unloading when the movable mold is closed.

[0009] Preferably, a track member is installed on the inner wall of each installation notch groove facing the movable mold, and a T-shaped slider support is slidably connected to the sliding output end of the track member;

[0010] The bottom end of the hydraulic damper is fixedly mounted on the outer wall of the T-shaped sliding block support.

[0011] Preferably, a positioning rod is connected through the slider of the T-shaped slider support, and compression springs are sleeved on both side ends of the positioning rod located on the T-shaped slider support;

[0012] Both ends of the positioning rod are fixed on the inner walls on both sides of the slideway cavity of the track member.

[0013] Preferably, each of the buffer unloading auxiliary wheels is rotatably installed in a U-shaped pallet, a supporting connecting plate is fixed between the back sides of the two U-shaped pallets, and the damping end of the hydraulic damper is fixed at the middle position of the back side of the supporting connecting plate.

[0014] Preferably, in this solution, a rubber buffer washer is sleeved on the circumference of each of the buffer unloading auxiliary wheels, and the rubber buffer washer elastically abuts against the inner wall of the movable mold.

[0015] In this solution, the back of the fixed mold is provided with a double-rod I-shaped cavity for installing a double-rod I-shaped support buffer plate;

[0016] One end of each of the air springs is fixedly mounted on the inner wall of the double-rod I-shaped chamber.

[0017] Preferably, in this solution, a plurality of positioning rods are symmetrically welded to the inner wall of the double-rod I-shaped support buffer plate toward the fixed mold, and the positioning rods are inserted from the double-rod I-shaped cavity to the inside of the fixed mold.

[0018] In the preferred embodiment of the present invention, a compression spring is sleeved on the circumference of each positioning rod, and a free end of each compression spring elastically abuts against the inner wall of the double-rod I-shaped cavity.

[0019] Preferably, the movable mold has guide pillars fixed in a rectangular distribution on one side facing the fixed mold, and the outer wall of each guide pillar has a plurality of positioning steel balls embedded in a rolling manner in a circular array;

[0020] When the guide column is inserted into the guide hole of the fixed mold, the positioning steel ball is in rolling friction contact with the inner wall of the guide hole.

[0021] The beneficial effects of the utility model are:

[0022] The injection molding mold for key components of the DTMB system has a double-rod I-shaped support buffer plate embedded in the back of the fixed mold, and is equipped with an air spring to form a shock-absorbing buffer layer between the mold and the installation machine. The elastic characteristics of the air spring can effectively absorb and alleviate various vibrations during the operation of the mold, significantly reduce vibration transmission, ensure accurate mold centering, and improve mold clamping accuracy. Compared with the existing technology, this design greatly reduces product dimensional deviations and flash problems caused by mold vibration, and improves the production quality of the inverter housing;

[0023] An installation notch groove is set on the side of the fixed mold facing the movable mold, which contains a hydraulic damper and a buffer unloading auxiliary wheel connected to it. When the movable mold and the fixed mold are closed, the hydraulic damper uses the damping effect of the internal oil and cooperates with the sliding mechanism to effectively absorb the impact force and buffer, reduce the impact of closing the mold, and avoid product defects caused by excessive pressure. Compared with the existing technology, this refined unloading and shock-absorbing design significantly reduces the impact force during the closing process and improves the surface quality and dimensional stability of the product;

[0024] The hydraulic damper is connected to the track piece through a T-shaped slider support, and the internal positioning rod is connected to the inner wall of the track piece through a compression spring to form a dynamically stable support structure. This design ensures that the hydraulic damper remains stable during the sliding process, and can provide adjustable elastic support through the compression spring, thereby enhancing the overall shock absorption effect and improving the stability and reliability of the mold operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a schematic structural diagram of the double-rod I-shaped chamber and the double-rod I-shaped support buffer plate of the utility model in a disassembled state;

[0028] Figure 3 It is a schematic diagram of the structure of the hydraulic damper and the T-shaped slider support of the utility model in the split state;

[0029] Figure 4 It is a schematic diagram of the structure of the positioning rod and the slideway cavity of the utility model in the disassembled state;

[0030] Figure 5 It is a schematic structural diagram of the installation state of the DTMB inverter housing mold core and the movable mold of the utility model.

[0031] Description of reference numerals:

[0032] In the figure: 1. Fixed mold; 2. Moving mold; 3. Double-rod I-shaped chamber; 4. Silicone cushion; 5. Installation notch; 6. Buffer unloading auxiliary wheel; 7. Air spring; 8. Double-rod I-shaped support buffer plate; 9. Positioning rod; 10. Extrusion spring;

[0033] 11. Track parts; 12. Rubber buffer gasket; 13. U-shaped card plate; 14. Support connecting plate; 15. Hydraulic damper; 16. T-shaped slider support; 17. Positioning rod; 18. Compression spring; 19. Connecting seat;

[0034] 20. Slideway cavity;

[0035] 21. DTMB inverter housing mold; 22. Guide column; 23. Positioning steel ball. DETAILED DESCRIPTION

[0036] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the utility model and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0039] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0041] This embodiment discloses Figures 1 to 5 An injection molding mold for key components of a DTMB system is shown, comprising a fixed mold 1 and a movable mold 2 and a DTMB inverter housing mold core 21 embedded in the mold cavity of the movable mold 2, which is used to mold key housing components of the DTMB inverter; a guide column 22 is fixed in a rectangular distribution on one side of the movable mold 2 facing the fixed mold 1, and a plurality of positioning steel balls 23 are rollingly embedded in the outer wall of the peripheral side of each guide column 22 in a circular array. When the guide column 22 is inserted into the guide hole of the fixed mold 1, the positioning steel balls 23 are in rolling friction contact with the inner wall of the guide hole, thereby reducing the friction resistance during the mold closing process and improving the mold closing accuracy.

[0042] In the present embodiment, a double-rod I-shaped support buffer plate 8 is elastically embedded in the back side of the fixed mold 1, and a plurality of air springs 7 are arranged on the side of the double-rod I-shaped support buffer plate 8 facing the movable mold 2. The free end of each air spring 7 is connected to the interior of the fixed mold 1, forming a buffer for the double-rod I-shaped support buffer plate 8 to elastically abut against the inner wall of the installation machine, forming a shock-absorbing buffer to absorb the vibration generated when the mold is working. When the mold is working, the air spring 7 can effectively absorb the vibration from the fixed mold 1, reduce the vibration transmission of the entire mold, and thus improve the mold closing accuracy.

[0043] In this embodiment, when the fixed mold 1 is installed on the inner wall of the injection molding machine, a silicone cushion pad 4 is bonded to the back of the double-rod I-shaped support buffer plate 8, and the silicone cushion pad 4 elastically abuts against the inner wall of the machine. A double-rod I-shaped cavity 3 for installing the double-rod I-shaped support buffer plate 8 is opened on the back of the fixed mold 1. One end of each air spring 7 is fixedly installed on the inner wall of the double-rod I-shaped cavity 3 to ensure that the air spring 7 remains stable during operation; the double-rod I-shaped support buffer plate 8 is symmetrically welded with multiple positioning rods 9 toward the inner wall of the fixed mold 1, and the positioning rods 9 are inserted from the double-rod I-shaped cavity 3 to the inside of the fixed mold 1 to enhance the connection stability and positioning accuracy between the double-rod I-shaped support buffer plate 8 and the fixed mold 1; each positioning rod 9 is sleeved with an extrusion spring 10 on its circumferential side, and the free end of each extrusion spring 10 elastically abuts against the inner wall of the double-rod I-shaped cavity 3 to provide elastic support for the positioning rod 9.

[0044] In the present embodiment, mounting notch grooves 5 are provided at both ends of a side surface of the fixed mold 1 facing the movable mold 2, and a hydraulic damper 15 is slidably installed in each mounting notch groove 5. The damping end of each hydraulic damper 15 is symmetrically connected to two buffer unloading auxiliary wheels 6. Each buffer unloading auxiliary wheel 6 is in the mounting notch groove 5 through the hydraulic damper 15 to provide buffering and shock-absorbing unloading force for the movable mold 2 when the mold is closed. When the movable mold 2 is closed with the fixed mold 1, the movable mold 2 hits the buffer unloading auxiliary wheel 6. With the help of the buffering damping and sliding effect of the hydraulic damper 15, force unloading, buffering and shock absorption are realized, thereby further reducing the impact force during the closing process.

[0045] In this embodiment, a track member 11 is installed on the inner wall of each mounting notch groove 5 facing the movable mold 2, and a T-shaped slider support 16 is slidably connected to the sliding output end of the track member 11. The bottom end of the hydraulic damper 15 is fixedly installed on the outer wall of the T-shaped slider support 16, and connecting seats 19 are welded at both ends of the hydraulic damper 15. The two connecting seats 19 are fixedly connected to the T-shaped slider support 16 and the supporting connecting plate 14 by screws, respectively, to ensure that the hydraulic damper 15 works stably during the sliding process.

[0046] In this embodiment, a positioning rod 17 is connected through the slider of the T-shaped slider support 16. Compression springs 18 are sleeved on both side ends of the positioning rod 17 located on the T-shaped slider support 16. Both ends of the positioning rod 17 are fixed to the inner walls of the slideway cavity 20 of the track member 11. The compression springs 18 are used to provide stable and adjustable elastic support to ensure the stability of the T-shaped slider support 16 and the hydraulic damper 15 thereon during the sliding process. This structure ensures that the hydraulic damper 15 remains stable during the sliding process, and can provide adjustable elastic support through the compression springs 18, thereby further enhancing the shock absorbing effect of the hydraulic damper.

[0047] In this embodiment, each buffer unloading auxiliary wheel 6 is rotatably installed in the U-shaped clamping plate 13, and a supporting connecting plate 14 is fixed between the back sides of the two U-shaped clamping plates 13. The damping end of the hydraulic damper 15 is fixed at the middle position of the back side of the supporting connecting plate 14, ensuring that the buffer unloading auxiliary wheel 6 can effectively transmit force to the hydraulic damper 15 when subjected to force, thereby achieving buffering and shock absorption; a rubber buffer gasket 12 is sleeved on the circumferential side of each buffer unloading auxiliary wheel 6, and the rubber buffer gasket 12 elastically abuts against the inner wall of the movable mold 2, providing additional buffering protection, reducing the impact force when the mold is closed, and reducing the risk of flash.

[0048] Working principle:

[0049] This injection molding mold for key parts of the DTMB system, when the mold is working, the air spring 7 can absorb and mitigate the vibration caused by the mold itself or external factors (such as uneven foundation, unstable installation) with its good elastic properties, so that an effective shock-absorbing buffer layer is formed between the fixed mold 1 and the installation machine. In this way, the vibration transmission of the entire mold can be reduced, the mold can be accurately aligned, and the mold clamping accuracy can be improved;

[0050] During the mold closing process, when the movable mold 2 hits the buffer unloading auxiliary wheel 6, the hydraulic damper 15 generates a damping force through the flow resistance of the internal oil, and at the same time utilizes the sliding effect to buffer and disperse the impact force, thereby achieving unloading buffering and shock absorption.

[0051] When the rubber buffer gasket 12 elastically abuts against the inner wall of the movable mold 2, the rubber buffer gasket 12 provides additional buffering protection when the mold is closed. When the guide column 22 is inserted into the guide hole of the fixed mold 1, the positioning steel ball 23 rolls and frictionally contacts the inner wall of the guide hole, which significantly reduces the friction resistance during the mold closing process and ensures that the movable mold 2 and the fixed mold 1 are accurately aligned.

[0052] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An injection molding mold for key components of a DTMB system, comprising a fixed mold, a movable mold, and a DTMB inverter housing mold core embedded in the movable mold cavity, characterized in that: A double-rod I-shaped support buffer plate is elastically embedded in the back of the fixed mold, and a plurality of air springs are arranged on the side of the double-rod I-shaped support buffer plate facing the movable mold, and the free end of each of the air springs is connected to the inside of the fixed mold, forming a buffer for the double-rod I-shaped support buffer plate to elastically abut against the inner wall of the mounting platform; Both ends of the side surface of the fixed mold facing the movable mold are provided with installation notch grooves, and a hydraulic damper is slidably installed in each of the installation notch grooves. The damping end of each hydraulic damper is symmetrically connected to two buffer unloading auxiliary wheels, and each of the buffer unloading auxiliary wheels is in the installation notch groove through the hydraulic damper to provide buffering and shock-absorbing unloading force when the movable mold is closed.

2. The injection molding die for key components of the DTMB system according to claim 1, characterized in that: A track member is installed on the inner wall of each installation notch groove facing the movable mold, and a T-shaped slider support is slidably connected to the sliding output end of the track member; The bottom end of the hydraulic damper is fixedly mounted on the outer wall of the T-shaped sliding block support.

3. The injection molding die for key components of the DTMB system according to claim 2, characterized in that: A positioning rod is connected through the slider of the T-shaped slider support, and compression springs are sleeved on both ends of the positioning rod located on the T-shaped slider support; Both ends of the positioning rod are fixed on the inner walls on both sides of the slideway cavity of the track member.

4. The injection molding die for key components of the DTMB system according to claim 3, characterized in that: Each of the buffer unloading auxiliary wheels is rotatably installed in the U-shaped card plate, a supporting connecting plate is fixed between the back sides of the two U-shaped card plates, and the damping end of the hydraulic damper is fixed at the middle position of the back side of the supporting connecting plate.

5. The injection molding die for key components of the DTMB system according to claim 4, characterized in that: A rubber buffer washer is sleeved on the circumference of each of the buffer unloading auxiliary wheels, and the rubber buffer washer elastically abuts against the inner wall of the movable mold.

6. The injection molding die for key components of the DTMB system according to claim 5, characterized in that: The back of the fixed mold is provided with a double-rod I-shaped cavity for installing a double-rod I-shaped support buffer plate; One end of each of the air springs is fixedly mounted on the inner wall of the double-rod I-shaped chamber.

7. The injection molding die for key components of the DTMB system according to claim 6, characterized in that: A plurality of positioning rods are symmetrically welded to the inner wall of the double-rod I-shaped support buffer plate facing the fixed mold, and the positioning rods are inserted from the double-rod I-shaped cavity to the inside of the fixed mold.

8. The injection molding die for key components of the DTMB system according to claim 7, characterized in that: A compression spring is sleeved on the circumference of each positioning rod, and a free end of each compression spring elastically abuts against the inner wall of the double-rod I-shaped cavity.

9. The injection molding die for key components of the DTMB system according to claim 8, characterized in that: A guide column is fixed in a rectangular distribution on one side of the movable mold facing the fixed mold, and a plurality of positioning steel balls are rolled and embedded in the outer wall of each guide column in a circular array; When the guide column is inserted into the guide hole of the fixed mold, the positioning steel ball is in rolling friction contact with the inner wall of the guide hole.

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