A mold hot runner fitting

Abstract

The utility model discloses a mould hot runner accessory, including hot runner board, be provided with two groups of elastic compensation structure between hot runner board and mould inner wall, and elastic compensation structure includes lifting clamp plate, spring sleeve and elastic push rod, and two lifting clamp plates set in the both ends of hot runner board, the utility model discloses two groups of lifting clamp plate under the elastic force of buffer spring automatic shrinkage clamping mouth, can self -adaptation clamping and steady lifting hot runner board, and the butt joint limit of combining hot nib and hot nib positioning groove, ensure that hot runner board always keeps accurate positioning before and in the work of injection, reduces the failure risk of assembly deviation, aiming at the thermal expansion and contraction and mechanical deformation of hot runner board because of temperature change and pressure fluctuation in the injection process, and elastic compensation structure is through lifting clamp plate and elastic push rod retraction, buffer rubber sleeve extrusion and buffer spring tensile deformation, realizes the dynamic adaptation to hot runner board deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of hot runner accessories, specifically a mold hot runner accessory. Background Technology

[0002] In modern injection molding, hot runner systems are a core technology that directly impacts the quality, production efficiency, and material utilization of injection-molded products. Hot runner technology, by incorporating heating devices within the mold, keeps the molten plastic in a molten state throughout the runner, avoiding the formation of solidified sprue at the gate, as is common in traditional cold runner systems. This significantly reduces material loss, shortens molding cycles, and improves product consistency. The hot runner plate, as a key load-bearing component of the hot runner system, plays a crucial role in melt distribution, temperature control, and structural support. Its stability and positioning accuracy directly determine the smoothness of the injection molding process and the product yield.

[0003] Traditional hot runner plates are typically rigidly fixed to the mold using bolts or locating pins. While this structure provides initial positioning, it cannot handle the thermal expansion and contraction during injection molding. The hot runner plate expands and deforms during heating, while the mold body remains at a relatively low temperature. This difference in thermal expansion coefficients creates significant internal stress at the rigid connection, easily leading to hot runner plate warping, mold surface wear, and deformation of the connection, potentially causing serious malfunctions such as runner blockage or material leakage. Furthermore, deformation at the connection point affects the accuracy of the hot runner plate's position, creating potential misalignment with both the primary injection nozzle and the secondary receiving nozzle. Therefore, a mold hot runner accessory is needed to address these existing problems. Utility Model Content

[0004] The purpose of this utility model is to provide a mold hot runner accessory to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hot runner component for a mold, comprising a hot runner plate, wherein two sets of elastic compensation structures are provided between the hot runner plate and the inner wall of the mold, the elastic compensation structure comprising a lifting clamp, a spring sleeve and an elastic push rod, the two lifting clamps being disposed at both ends of the hot runner plate, the spring sleeve being disposed on one side of the lifting clamp, the elastic push rod being slidably connected to one side surface of the lifting clamp, and a buffer spring being sleeved at the part of the elastic push rod that extends into the spring sleeve.

[0006] Preferably, one end of the elastic push rod extending out of the spring sleeve is fixed to the side surface of the lifting clamp, and one end of the elastic push rod extending into the spring sleeve is fixed with a telescopic guide block.

[0007] Preferably, one end of the buffer spring is fixed to the inner end wall of the spring sleeve, and the other end of the buffer spring is fixed to the end face of the telescopic guide block.

[0008] Preferably, the surface of the elastic push rod is covered with a buffer sleeve, which is disposed between the spring sleeve and the lifting clamp.

[0009] Preferably, the hot runner plate has an internal receiving groove, and an electric heating frame is embedded and fixed in the receiving groove of the hot runner plate.

[0010] Preferably, the hot runner plate has a hot runner inside, and the upper end surface of the hot runner plate has a hot nozzle positioning groove, which is connected to the hot runner.

[0011] This utility model provides a mold hot runner accessory, which has the following advantages compared with the prior art:

[0012] (1) The two sets of lifting clamps automatically retract the clamping opening under the elastic force of the buffer spring, which can adaptively clamp and stably lift the hot runner plate. Combined with the docking restriction of the hot nozzle and the hot nozzle positioning groove, it ensures that the hot runner plate always maintains accurate positioning before injection molding and during operation, reducing the risk of failure caused by assembly deviation.

[0013] (2) To address the thermal expansion and contraction and mechanical deformation of the hot runner plate caused by temperature changes and pressure fluctuations during injection molding, the elastic compensation structure dynamically adapts to the deformation of the hot runner plate through the retraction of the lifting clamp and elastic push rod, the compression of the buffer sleeve, and the stretching deformation of the buffer spring. This effectively avoids excessive compression of the mold connection parts when the hot runner plate expands, reduces mechanical damage to parts and the mold, and lowers maintenance costs. Even if the lifting clamp adjusts its position due to the deformation of the hot runner plate, it can still continuously and stably lift and position the hot runner plate through the adaptive characteristics of the elastic structure, ensuring the structural stability of the hot runner system under complex working conditions (such as temperature fluctuations and pressure changes), and avoiding injection molding defects (such as material leakage and unstable pressure) caused by positioning failure. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model;

[0015] Figure 2 This is a three-dimensional view of the electric heating rack structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the elastic compensation structure of this utility model;

[0017] Figure 4 This is a three-dimensional cross-sectional view of the spring sleeve structure of this utility model.

[0018] In the diagram: 1. Hot runner plate; 2. Hot nozzle positioning groove; 3. Electric heating frame; 4. Elastic compensation structure; 5. Lifting clamp; 6. Spring sleeve; 7. Elastic push rod; 8. Buffer sleeve; 9. Buffer spring; 10. Telescopic guide block; 11. Receiving groove. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This utility model provides a mold hot runner accessory, including a hot runner plate 1, whose traditional rigid connection with the inner wall of the mold is replaced by two sets of elastic compensation structures 4, realizing the adaptive adjustment function under complex working conditions; during the assembly stage, the end of the spring sleeve 6 away from the hot runner plate 1 is pre-fixed to the inner wall of the mold, the hot runner plate 1 is embedded in the clamping port between the two sets of lifting clamps 5, and the initial elastic force of the buffer spring 9 causes the clamping port to naturally contract, forming an adaptive clamping and lifting of the hot runner plate 1; when the hot nozzle is assembled in place, its lower end is precisely connected to the hot nozzle positioning groove 2, and the displacement of the hot runner plate 1 is further restricted by rigid positioning.

[0021] The elastic compensation structure 4 adopts a modular design, consisting of three main components: a lifting clamping plate 5, a spring sleeve 6, and an elastic push rod 7. The two lifting clamping plates 5 are symmetrically arranged at both ends of the hot runner plate 1, forming a stable clamping support structure. The spring sleeve 6 is located on the outer side of the lifting clamping plate 5, providing a mounting base for elastic adjustment. The elastic push rod 7 is slidably mounted on the side surface of the lifting clamping plate 5, and its extension into the spring sleeve 6 is fitted with a buffer spring 9, forming a double elastic buffer mechanism.

[0022] Further structural details show that one end of the elastic push rod 7 extending out of the spring sleeve 6 is rigidly connected to the side surface of the lifting clamp 5, while the other end extending into the spring sleeve 6 is fixedly mounted with the telescopic guide block 10. The telescopic guide block 10 forms a precise sliding fit with the inner wall of the spring sleeve 6 to ensure stability during the telescopic process. The buffer spring 9 adopts a two-end fixed design, with one end connected to the inner end wall of the spring sleeve 6 and the other end fixed to the end face of the telescopic guide block 10. A buffer sleeve 8 is also fitted on the surface of the elastic push rod 7 between the spring sleeve 6 and the lifting clamp 5. The vibration is absorbed by the deformation characteristics of the rubber and plastic material. During the dynamic process of injection molding, the elastic compensation structure 4 can adaptively adjust to the thermal expansion and contraction and mechanical deformation caused by temperature changes and injection pressure fluctuations in the hot runner system. When the hot runner plate 1 expands due to temperature rise, the lifting clamp 5 is subjected to lateral extrusion force and retracts into the spring sleeve 6 through the elastic push rod 7. During this process, the buffer sleeve 8 first absorbs the initial impact force through elastic deformation. At the same time, the buffer spring 9 inside the spring sleeve 6 undergoes tensile deformation, converting mechanical energy into elastic potential energy for storage. This graded buffering mechanism can automatically match the deformation of the hot runner plate 1 and effectively avoid the stress concentration caused by thermal expansion that causes extrusion damage to the mold connection parts.

[0023] The hot runner plate 1 integrates multiple functional structures: a fixed electric heating frame 3 is embedded in the internal receiving groove 11 to achieve precise temperature control; the internal hot runner system is connected to the hot nozzle positioning groove 2 on the upper end face, and the assembly of the hot nozzle realizes the dual functions of material conveying and position positioning; the lifting clamp 5 always maintains stable lifting and positioning of the hot runner plate 1 during the position adjustment process. This dynamic balance capability significantly improves the operational reliability of hot runner components under complex working conditions such as alternating high and low temperatures and frequent pressure fluctuations.

[0024] The solution has the following working process: Before use, the end of the spring sleeve 6 away from the hot runner plate 1 is pre-fixed on the inner wall of the mold, while the hot runner plate 1 is embedded in the clamping port between the two sets of lifting clamps 5. Under the elastic force of the buffer spring 9, the two sets of lifting clamps 5 shrink the clamping port and adaptively clamp and lift the hot runner plate 1. At the same time, when the hot nozzle for injection is assembled onto the mold, the lower end of the hot nozzle is connected to the hot nozzle positioning groove 2 of the hot runner plate 1. The hot nozzle can restrict the position of the hot runner plate 1.

[0025] During the injection molding process, the hot runner system is affected by various factors such as temperature changes and injection pressure fluctuations, causing the hot runner plate 1 to expand and contract due to temperature changes and mechanical deformation. When the hot runner plate 1 expands due to temperature rise, the lifting clamp 5 is compressed and retracts into the spring sleeve 6 through the elastic push rod 7. During the retraction of the elastic push rod 7, it compresses the buffer sleeve 8 and causes the buffer spring 9 inside the spring sleeve 6 to undergo tensile deformation. This elastic compensation structure 4 can automatically adapt to the deformation of the hot runner plate 1, which can prevent damage to the connection part with the mold due to excessive compression caused by the expansion of the hot runner plate 1. In addition, the lifting clamp 5 still adaptively lifts and positions the hot runner plate 1 after the position is adjusted. Therefore, this expansion and position adaptive structure can effectively improve the reliability and service life of hot runner components under complex working conditions.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Although embodiments of this utility model have been shown and described, this does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model. Regarding the embodiments of this utility model, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mold hot runner component, comprising a hot runner plate (1), characterized in that: Two sets of elastic compensation structures (4) are provided between the hot runner plate (1) and the inner wall of the mold. The elastic compensation structure (4) includes a lifting clamp (5), a spring sleeve (6) and an elastic push rod (7). The two lifting clamps (5) are provided at both ends of the hot runner plate (1). The spring sleeve (6) is provided on one side of the lifting clamp (5). The elastic push rod (7) is slidably connected to one side surface of the lifting clamp (5). A buffer spring (9) is sleeved on the part of the elastic push rod (7) that extends into the spring sleeve (6).

2. A mold hot runner accessory according to claim 1, characterized in that: The end of the elastic push rod (7) extending out of the spring sleeve (6) is fixed to the side surface of the lifting clamp (5), and the end of the elastic push rod (7) extending into the spring sleeve (6) is fixed with a telescopic guide block (10).

3. A mold hot runner accessory according to claim 2, characterized in that: One end of the buffer spring (9) is fixed to the inner end wall of the spring sleeve (6), and the other end of the buffer spring (9) is fixed to the end face of the telescopic guide block (10).

4. A mold hot runner accessory according to claim 3, characterized in that: The surface of the elastic push rod (7) is fitted with a buffer sleeve (8), which is located between the spring sleeve (6) and the lifting clamp (5).

5. A mold hot runner accessory according to claim 1, characterized in that: The hot runner plate (1) has an internal receiving groove (11), and an electric heating rack (3) is embedded and fixed in the receiving groove (11) of the hot runner plate (1).

6. A mold hot runner accessory according to claim 1, characterized in that: The hot runner plate (1) has a hot runner inside, and a hot nozzle positioning groove (2) is opened on the upper end surface of the hot runner plate (1), and the hot nozzle positioning groove (2) is connected to the hot runner.

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