Positioning and guiding mechanism for flowerpot injection mold

Abstract

The utility model discloses a flowerpot injection mold positioning guide mechanism belongs to injection mold technical field, and its technical scheme main points include injection mold and injection mold, be provided with positioning guide mechanism between injection mold and injection mold, the positioning guide mechanism includes the guide structure of setting in the front side of injection mold, and the application is through setting injection mold, injection mold and positioning guide mechanism, with the corresponding cooperation of guide structure and guide bar structure, the abrasion problem of traditional " guide pillar + guide sleeve " structure because of metal hard contact is solved, in guide structure, the locating disc is fixed through the screw rod and the stem hole of injection mold, locking bolt, ensures that the conical guide sleeve is positioned in the barrel hole stably, and the locating sleeve of its back side can be accurate with guide bar structure and adapts, avoids the situation of aggravating abrasion because of the unstable installation in traditional cooperation, and simultaneously, the cooperation of locating sleeve and guide bar structure can reduce the friction loss of high frequency mold closing.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a positioning and guiding mechanism for a flower pot injection mold. Background Technology

[0002] In the production of plastic flower pots, the positioning and guiding accuracy of the injection mold directly determines the product quality: the mold must be positioned and guided by a positioning and guiding mechanism to ensure that the moving mold (movable side) and the fixed mold (fixed side) are precisely aligned when the mold is closed, to ensure the cavity is sealed, to avoid leakage of injection liquid and the generation of flash, or to cause uneven wall thickness and incomplete molding of the flower pot due to misalignment.

[0003] Currently, existing flowerpot injection mold positioning and guiding mechanisms generally suffer from a core problem: positioning accuracy is easily affected by wear, and guiding deviation increases significantly after long-term use. These mechanisms mostly adopt the traditional "guide post + guide sleeve" mating structure, where the guide post and guide sleeve are in a hard metal-to-metal contact mode. During mold closing, the two rub against each other at high frequency, and after long-term use, the outer circle of the guide post or the inner hole of the guide sleeve is prone to wear, directly leading to an increase in the mating clearance. Flowerpot mold cavities are often irregularly shaped structures with raised edges and wood grain textures, which already have high requirements for positioning accuracy. Once the mating clearance increases, misalignment between the moving mold and the fixed mold is very likely to occur during mold closing. This not only causes flash on the flowerpot injection molded parts, requiring additional manual trimming and increasing production costs, but may also cause leakage of injection liquid due to poor cavity sealing, resulting in mold damage and material waste. More importantly, the accuracy reduction caused by wear cannot be alleviated by simple maintenance. After long-term use, the guide post and guide sleeve need to be replaced frequently, which increases mold maintenance costs and leads to extended production downtime, making it difficult to meet the high-efficiency requirements of mass production of flowerpots.

[0004] To address this, a positioning and guiding mechanism for flowerpot injection molds is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a positioning and guiding mechanism for flower pot injection molds, which solves a core problem commonly found in existing flower pot injection mold positioning and guiding mechanisms: positioning accuracy is easily affected by wear, and the guiding deviation increases significantly after long-term use. These mechanisms mostly adopt a traditional "guide post + guide sleeve" mating structure, with the guide post and guide sleeve in a hard metal-to-metal contact mode. During the mold closing process, the two rub against each other at high frequency, and after long-term use, the outer circle of the guide post or the inner hole of the guide sleeve is prone to wear, directly leading to an increase in the mating clearance between the two. Furthermore, flower pot mold cavities are often irregularly shaped with raised ridges and imitation wood grain textures. The structure inherently requires high positioning accuracy. If the clearance between the mold and the mold increases, misalignment between the moving mold and the fixed mold is likely to occur during mold closing. This will not only cause flash on the injection molded flower pot parts, requiring additional manual trimming and increasing production costs, but may also lead to leakage of injection liquid due to poor cavity sealing, resulting in mold damage and material waste. More importantly, the precision loss caused by wear cannot be alleviated by simple maintenance. After long-term use, guide pillars and guide sleeves need to be replaced frequently, which increases mold maintenance costs and extends production downtime, making it difficult to meet the high-efficiency requirements of mass production of flower pots.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning and guiding mechanism for a flower pot injection mold, comprising a fixed injection mold and a moving injection mold, wherein a positioning and guiding mechanism is provided between the fixed injection mold and the moving injection mold, the positioning and guiding mechanism comprising a guide structure disposed on the front side of the fixed injection mold, and a guide rod structure corresponding to the rear side of the moving injection mold and corresponding to the guide structure;

[0007] The guiding structure includes cylindrical holes at the four corners of the front side of the injection mold. A positioning groove is provided on the front side of the cylindrical hole. Rod holes are provided around the front side of the positioning groove. A positioning plate is engaged inside the positioning groove. Screws are welded to the four corners of the rear side of the positioning plate. The rear side of the screws passes through the inside of the rod holes. A tapered guide sleeve is welded to the rear side of the positioning plate. The tapered guide sleeve is located on the rear side of the guide rod structure and inside the cylindrical hole. A positioning sleeve is fixedly connected to the rear side of the tapered guide sleeve. A locking bolt is threaded to the rear side of the outer side of the screw.

[0008] Preferably, the guide rod structure includes connecting grooves at the four corners of the rear side of the injection mold, and through holes are provided around the rear side of the connecting grooves. A connecting disc is engaged inside the connecting groove.

[0009] Preferably, lead screws are welded to all four sides of the front side of the connecting plate, and fixing bolts are threaded onto the front side of the lead screw surface.

[0010] Preferably, a tapered docking post is welded to the rear side of the connecting plate, a guide post is welded to the rear side of the tapered docking post, the guide post is located on the front side of the tapered guide sleeve, a tapered guide head is fixedly connected to the rear side of the guide post, and a titanium nitride coating is sprayed on the outer side of the tapered guide head.

[0011] Preferably, a reinforcing ring washer is provided on the rear side of the outer side of the screw, and the reinforcing ring washer is located on the front side of the locking bolt.

[0012] Preferably, a buffer sealing gasket is adhered to the front side of the positioning disk, and the buffer sealing gasket is made of rubber material.

[0013] Preferably, the positioning sleeve has an annular groove inside, and an elastic wear-resistant ring is embedded inside the annular groove.

[0014] Preferably, the guide post has an annular mounting groove on its outer side, and a wear-resistant ring is embedded inside the annular mounting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application solves the wear problem caused by hard metal contact in the traditional "guide post + guide sleeve" structure by setting up a fixed injection mold, a moving injection mold, and a positioning and guiding mechanism, and by using the corresponding cooperation between the guide structure and the guide rod structure. In the guide structure, the positioning plate is fixed to the rod hole of the fixed injection mold and the locking bolt through the screw, ensuring that the conical guide sleeve is stably located in the cylinder hole. The positioning sleeve on its rear side can be precisely matched with the guide rod structure, avoiding the situation of increased wear due to unstable installation in the traditional cooperation. At the same time, the cooperation between the positioning sleeve and the guide rod structure can reduce the friction loss generated by high-frequency mold closing, prevent the cooperation gap from expanding, and ensure that high-precision positioning can still be maintained after long-term use, meeting the mold closing accuracy requirements of the irregular cavity of the flower pot, and avoiding flash or uneven wall thickness of the flower pot injection parts due to misalignment.

[0017] 2. This application achieves precise guidance in the initial stage of mold closing by setting a conical guide sleeve and utilizing its position design within the cylinder hole and corresponding to the guide rod structure. During mold closing, the guide rod structure can first contact the conical guide sleeve, and the conical structure can quickly complete the pre-positioning, avoiding local hard friction caused by initial misalignment, reducing wear. Furthermore, the conical guide sleeve is firmly connected to the injection mold through the positioning plate and screw, and will not shift due to the impact force of mold closing, further ensuring the fitting accuracy and reducing the risk of injection liquid leakage and mold damage caused by positioning deviation. At the same time, it reduces the frequency of component replacement, reduces maintenance costs and downtime, and is suitable for the mass production needs of flower pots. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the flowerpot injection mold positioning and guiding mechanism of this utility model;

[0019] Figure 2 This is a structural diagram of the positioning and guiding mechanism of this utility model;

[0020] Figure 3 This is a structural diagram of the guiding structure of this utility model;

[0021] Figure 4 This is a structural diagram of the guide rod structure of this utility model;

[0022] Figure 5 This is a structural diagram of the positioning sleeve of this utility model.

[0023] In the diagram, 1. Injection mold; 2. Injection mold; 3. Positioning and guiding mechanism; 301. Guide structure; 3011. Cylinder hole; 3012. Positioning groove; 3013. Rod hole; 3014. Positioning plate; 3015. Screw; 3016. Conical guide sleeve; 3017. Positioning sleeve; 3018. Locking bolt; 302. Guide rod structure; 3021. Connecting groove; 3022. Through hole; 3023. Connecting plate; 3024. Lead screw; 3025. Fixing bolt; 3026. Conical mating post; 3027. Guide post; 3028. Conical guide head; 4. Reinforcing ring gasket; 5. Buffer sealing gasket; 6. Annular groove; 7. Elastic wear-resistant ring; 8. Annular mounting groove; 9. Wear-resistant ring. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-5 The present invention provides the following technical solution:

[0026] A positioning and guiding mechanism for a flower pot injection mold includes a fixed injection mold 1 and a moving injection mold 2. A positioning and guiding mechanism 3 is provided between the fixed injection mold 1 and the moving injection mold 2. The positioning and guiding mechanism 3 includes a guide structure 301 provided on the front side of the fixed injection mold 1 and a guide rod structure 302 corresponding to the rear side of the moving injection mold 2 and corresponding to the guide structure 301.

[0027] The guide structure 301 includes cylindrical holes 3011 at the four corners of the front side of the injection mold 1. A positioning groove 3012 is provided on the front side of the cylindrical hole 3011. Rod holes 3013 are provided around the front side of the positioning groove 3012. A positioning plate 3014 is engaged inside the positioning groove 3012. Screws 3015 are welded to the four corners of the rear side of the positioning plate 3014. The rear side of the screws 3015 passes through the interior of the rod holes 3013. A tapered guide sleeve 3016 is welded to the rear side of the positioning plate 3014. The tapered guide sleeve 3016 is located on the rear side of the guide rod structure 302 and inside the cylindrical hole 3011. A positioning sleeve 3017 is fixedly connected to the rear side of the tapered guide sleeve 3016. A locking bolt 3018 is threadedly connected to the rear side of the outer side of the screw 3015.

[0028] In this embodiment: by setting up a fixed injection mold 1, a moving injection mold 2, and a positioning and guiding mechanism 3, the positioning and guiding mechanism 3 completes the positioning and guiding through the corresponding cooperation of the guide structure 301 and the guide rod structure 302. During installation, the positioning plate 3014 in the guide structure 301 is snapped into the positioning groove 3012 on the front side of the fixed injection mold 1, and its four corner screws 3015 penetrate through the rod holes 3013 on the front side of the positioning groove 3012. The positioning plate 3014 is fixed by tightening the locking bolts 3018 on the rear side of the screws 3015, so that the conical guide sleeve 3016 welded on the rear side of the positioning plate 3014 is stably placed in the cylindrical hole 3011, and the positioning sleeve 3017 on the rear side of the conical guide sleeve 3016 is shaped as follows. To achieve a precise alignment, during mold closing, the guide rod structure 302, located in front of the guide structure 301, moves backward with the injection mold 2. The guide rod structure 302 first contacts the tapered guide sleeve 3016, using the tapered structure of the tapered guide sleeve 3016 to provide initial guidance and guide the guide rod structure 302 to be precisely aligned. As the injection mold 2 continues to move, the guide rod structure 302 penetrates deeper and forms a tight fit with the positioning sleeve 3017 behind the tapered guide sleeve 3016. Through the precise docking of the two, it is ensured that the injection mold 2 and the injection mold 1 are completely aligned when the mold is closed, avoiding misalignment, thereby ensuring the sealing performance of the flowerpot injection cavity and meeting the positioning accuracy requirements of flowerpot injection molding production.

[0029] Specifically, such as Figure 4 As shown, the guide rod structure 302 includes connecting grooves 3021 opened at the four corners of the rear side of the injection mold 2. Through holes 3022 are opened around the rear side of the connecting grooves 3021. A connecting plate 3023 is snapped into the inside of the connecting grooves 3021.

[0030] Specifically, such as Figure 4 As shown, lead screws 3024 are welded to all four sides of the front side of the connecting plate 3023, and fixing bolts 3025 are threaded on the front side of the lead screw 3024.

[0031] Specifically, such as Figure 4As shown, a tapered docking post 3026 is welded to the rear side of the connecting plate 3023, and a guide post 3027 is welded to the rear side of the tapered docking post 3026. The guide post 3027 is located on the front side of the tapered guide sleeve 3016, and a tapered guide head 3028 is fixedly connected to the rear side of the guide post 3027. The outer side of the tapered guide head 3028 is coated with a titanium nitride coating.

[0032] In this embodiment: By setting a guide rod structure 302, during installation, the connecting plate 3023 is first snapped into the connecting grooves 3021 at the four corners of the rear side of the injection mold 2, so that the threaded rods 3024 around the rear side of the connecting plate 3023 pass through the through holes 3022 on the rear side of the connecting groove 3021. Then, the fixing bolts 3025 on the surface of the threaded rods 3024 are tightened. Through the threaded engagement of the bolts and the threaded rods 3024, the connecting plate 3023 is firmly fixed in the connecting groove 3021, preventing the guide rod structure 302 from shifting during mold closing. During mold closing, the tapered docking post 3026 welded to the rear side of the connecting plate 3023 first aligns with the guide structure 301, playing a preliminary alignment role. As the injection mold moves... As mold 2 moves backward, the guide post 3027 on the rear side of the tapered docking post 3026 gradually approaches the tapered guide sleeve 3016. The tapered guide head 3028 on the rear side of the guide post 3027 (with a titanium nitride coating on the outer side, which has high hardness and strong wear resistance) can be quickly inserted into the tapered guide sleeve 3016 (its inner wall can also be coated with a polytetrafluoroethylene wear-resistant layer). Precise positioning is achieved through the guidance of the tapered surface, ensuring that the guide post 3027, tapered guide sleeve 3016, and positioning sleeve 3017 are precisely matched, avoiding misalignment between the injection moving mold 2 and the injection fixed mold 1. At the same time, the titanium nitride coating reduces the frictional wear between the tapered guide head 3028 and the tapered guide sleeve 3016, extends the service life of the components, and ensures long-term mold closing accuracy.

[0033] Specifically, such as Figure 3 As shown, a reinforcing ring washer 4 is sleeved on the rear side of the outer side of the screw 3015, and the reinforcing ring washer 4 is located on the front side of the locking bolt 3018.

[0034] Specifically, such as Figure 5 As shown, a buffer sealing gasket 5 is bonded to the front side of the positioning disk 3014. The buffer sealing gasket 5 is made of rubber material.

[0035] In this embodiment: By setting a reinforcing ring gasket 4 and a buffer sealing gasket 5, the reinforcing ring gasket 4, which is sleeved on the rear side of the outer side of the screw 3015, is located in front of the locking bolt 3018. When the locking bolt 3018 is tightened to fix the positioning plate 3014, the reinforcing ring gasket 4 undergoes a slight deformation due to the pressure of the bolt, filling the gap between the locking bolt 3018 and the injection mold 1, increasing the friction between the locking bolt 3018 and the contact surface, preventing the locking bolt 3018 from loosening due to mold closing vibration, ensuring that the positioning plate 3014 and the rear conical guide sleeve 3016 are always firmly installed, avoiding guide deviation due to loose installation. The rubber buffer sealing gasket 5 bonded to the front side of the positioning plate 3014 can buffer the impact force of the injection moving mold 2 on the guide structure 301 during mold closing, reduce hard collision damage between metal parts, and ensure the long-term reliable operation of the guide structure 301.

[0036] Specifically, such as Figure 5 As shown, the positioning sleeve 3017 has an annular groove 6 inside, and an elastic wear-resistant ring 7 is embedded inside the annular groove 6.

[0037] Specifically, such as Figure 4 As shown, an annular mounting groove 8 is provided on the outer side of the guide post 3027, and a wear-resistant ring 9 is embedded inside the annular mounting groove 8.

[0038] In this embodiment: by providing an annular groove 6, an elastic wear-resistant ring 7, an annular mounting groove 8, and a wear-resistant ring 9, the annular groove 6 inside the positioning sleeve 3017 provides a fixing space for the elastic wear-resistant ring 7, allowing the elastic wear-resistant ring 7 to be stably embedded in the positioning sleeve 3017. The annular mounting groove 8 on the outside of the guide post 3027 is used to fix the wear-resistant ring 9, ensuring that the wear-resistant ring 9 moves synchronously with the guide post 3027. When the mold is closed, the guide post 3027 is inserted into the positioning sleeve 3017, and the wear-resistant ring 9 is in direct contact with the elastic wear-resistant ring 7. The elastic wear-resistant ring 7 (made of polytetrafluoroethylene) has... The low-friction characteristics reduce frictional wear between the wear ring 9 (made of silicon carbide) and the positioning sleeve 3017. At the same time, it compensates for minor wear of the components through its own elastic deformation, preventing the mating gap from widening. The high hardness of the wear ring 9 can resist the wear caused by long-term friction and protect the guide post 3027 from wear. The combination of the two not only fundamentally solves the wear problem of traditional "guide post + guide sleeve" metal hard contact, but also maintains long-term precise fit, ensuring that the injection moving mold 2 and the fixed mold are aligned when they are closed, avoiding problems such as flash and injection liquid leakage in the flower pot injection molded parts, and adapting to the needs of mass production.

[0039] Working principle: In the process of using the positioning and guiding mechanism of the flower pot injection mold, firstly, the installation and fixing of each structure are completed. For the guide structure 301, the positioning plate 3014 is snapped into the positioning grooves 3012 at the four corners of the front side of the injection mold 1. The screws 3015 at the four corners of the rear side of the positioning plate 3014 pass through the rod holes 3013 at the front side of the positioning groove 3012. After the reinforcing ring washer 4 is put on the rear side of the outside of the screw 3015, the locking bolt 3018 is tightened. The reinforcing ring washer 4 is compressed and deformed to fill the gap, preventing the locking bolt 3018 from loosening due to subsequent mold closing vibration. At the same time, the rubber buffer sealing gasket 5 on the front side of the positioning plate 3014 fits into the positioning groove 3012. To improve installation stability and buffer subsequent impact, for the guide rod structure 302, the connecting plate 3023 is inserted into the connecting grooves 3021 at the four corners of the rear side of the injection mold 2, so that the lead screw 3024 on the rear side of the connecting plate 3023 passes through the through hole 3022 of the connecting groove 3021. Tighten the fixing bolts 3025 on the lead screw 3024 to firmly fix the connecting plate 3023 and ensure that the guide rod structure 302 does not shift. After installation, the mold closing process begins. The injection molding machine drives the injection mold 2 to move towards the injection mold 1. The guide rod structure 302 moves backward synchronously with the injection mold 2. First, the tapered docking post 3026 on the rear side of the connecting plate 3023 connects with the guide structure 301. Initial alignment serves as a pre-alignment step. Next, the tapered guide head 3028 (with an outer titanium nitride coating) on ​​the rear side of the guide post 3027 gradually approaches the tapered guide sleeve 3016. Guided by the tapered surface, it quickly inserts into the tapered guide sleeve 3016, achieving precise initial positioning. The titanium nitride coating reduces frictional wear between the tapered guide head 3028 and the tapered guide sleeve 3016. As the injection mold 2 continues to move, the guide post 3027 penetrates deeper into the tapered guide sleeve 3016 until the wear-resistant ring 9 in the outer annular mounting groove 8 of the guide post 3027 contacts and engages with the elastic wear-resistant ring 7 embedded in the annular groove 6 inside the positioning sleeve 3017. The elastic wear-resistant ring 7, through low... Frictional properties reduce wear and can compensate for minor wear through deformation. The wear-resistant ring 9 protects the guide post 3027 body and avoids metal-to-metal hard contact wear. The two work together to maintain a precise fit gap. Finally, the injection moving mold 2 and the injection fixed mold 1 fit together completely. Through the multi-layer precise fit of the guide structure 301 and the guide rod structure 302, it is ensured that there is no misalignment between the two. The flower pot injection cavity is tightly sealed to avoid leakage of injection liquid or flash of flower pot injection parts. It meets the requirements of positioning accuracy and stability for mass injection production of flower pots. When the mold is opened, the injection moving mold 2 drives the guide rod structure 302 to disengage from the guide structure 301, and each component returns to its initial position, waiting for the next mold closing cycle.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning and guiding mechanism for a flowerpot injection mold, comprising an injection mold fixed half (1) and an injection mold movable half (2), characterized in that: A positioning and guiding mechanism (3) is provided between the fixed injection mold (1) and the moving injection mold (2). The positioning and guiding mechanism (3) includes a guide structure (301) located on the front side of the fixed injection mold (1) and a guide rod structure (302) corresponding to the rear side of the moving injection mold (2) and corresponding to the guide structure (301). The guide structure (301) includes cylindrical holes (3011) at the four corners of the front side of the injection mold (1). A positioning groove (3012) is provided on the front side of the cylindrical hole (3011). Rod holes (3013) are provided around the front side of the positioning groove (3012). A positioning plate (3014) is engaged inside the positioning groove (3012). Screws (3015) are welded to the four corners of the rear side of the positioning plate (3014). The rear of the screws (3015) Inside the through-hole (3013), a tapered guide sleeve (3016) is welded to the rear side of the positioning plate (3014). The tapered guide sleeve (3016) is located on the rear side of the guide rod structure (302). The tapered guide sleeve (3016) is located inside the cylindrical hole (3011). A positioning sleeve (3017) is fixedly connected to the rear side of the tapered guide sleeve (3016). A locking bolt (3018) is threadedly connected to the rear side of the outer side of the screw (3015).

2. A positioning guide mechanism for a flowerpot injection mold according to claim 1, characterized in that: The guide rod structure (302) includes connecting grooves (3021) opened at the four corners of the rear side of the injection mold (2). Through holes (3022) are opened around the rear side of the connecting grooves (3021). A connecting plate (3023) is snapped into the inside of the connecting grooves (3021).

3. A positioning guide mechanism for a flowerpot injection mold according to claim 2, characterized in that: The connecting plate (3023) is welded with lead screws (3024) on all four sides of its front side, and the lead screws (3024) are threaded with fixing bolts (3025) on their front side.

4. The positioning guide mechanism of an injection mold for flowerpots according to claim 2, wherein: A tapered docking post (3026) is welded to the rear side of the connecting plate (3023), and a guide post (3027) is welded to the rear side of the tapered docking post (3026). The guide post (3027) is located on the front side of the tapered guide sleeve (3016), and a tapered guide head (3028) is fixedly connected to the rear side of the guide post (3027). The outer side of the tapered guide head (3028) is coated with a titanium nitride coating.

5. The positioning guide mechanism for a flowerpot injection mold according to claim 1, characterized in that: A reinforcing ring washer (4) is fitted on the rear side of the outer side of the screw (3015), and the reinforcing ring washer (4) is located on the front side of the locking bolt (3018).

6. A positioning guide mechanism for a flowerpot injection mold according to claim 1, characterized in that: The front side of the positioning plate (3014) is bonded with a buffer sealing gasket (5), which is made of rubber material.

7. A positioning guide mechanism for a flowerpot injection mold according to claim 1, characterized in that: The positioning sleeve (3017) has an annular groove (6) inside, and an elastic wear-resistant ring (7) is embedded inside the annular groove (6).

8. The positioning guide mechanism of an injection mold for flowerpots according to claim 4, wherein: The guide post (3027) has an annular mounting groove (8) on its outer side, and a wear-resistant ring (9) is embedded inside the annular mounting groove (8).

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