A connecting device for hot runner systems

Abstract

The utility model relates to injection mold hot runner mechanism technical field discloses a kind of connecting devices for hot runner system, including shunt plate, the upside of shunt plate is equipped with limiting recess, the bottom side of limiting recess is equipped with communicating groove, the upside of limiting recess is rotatably connected with sprue bushing, the bottom side of sprue bushing is equipped with insertion slot at eccentric position, the downside of shunt plate is provided with multi-hole nozzle mechanism, the upside of sprue bushing is provided with the injection drive mechanism of making sprue bushing rotate, multi-hole nozzle mechanism includes the multiple hot nozzles installed on shunt plate, and the side of each hot nozzle is communicated with the lower end of communicating groove with channel, injection drive mechanism includes the multiple first direct sliding grooves being equipped in the inside of the sprue bushing, the utility model is inserted into spiral sliding slot by pointer push rod, the mode of promoting sprue bushing rotation is realized, and communicating groove and insertion slot are communicated or staggered and blocked, when melting temperature is too high or sprue cooling is not sufficient, hot nozzle flow casting, backflow can be prevented by blocking, reduce material waste.

Description

Technical Field

[0001] This utility model relates to the technical field of hot runner mechanism for injection molds, and in particular to a connecting device for a hot runner system. Background Technology

[0002] A hot runner system is a device in injection molds that maintains the plastic in a molten state through heating. It consists of hot nozzles, manifolds, a temperature control box, and accessories. Hot nozzles generally include two types: open hot nozzles and needle valve hot nozzles. Since the type of hot nozzle directly determines the selection of the hot runner system and the manufacturing of the mold, hot runner systems are often divided into open hot runner systems and needle valve hot runner systems. However, in actual operation, insufficient backflow, excessively high melting temperature, or insufficient gate cooling often lead to backflow and material waste due to hot nozzle dripping and backflow.

[0003] In view of this, a connection device for a hot runner system is proposed that can solve the above problems. Utility Model Content

[0004] To address the technical problem of hot nozzle casting in connection devices for hot runner systems, this utility model provides a connection device for hot runner systems.

[0005] This utility model is achieved using the following technical solution: a connecting device for a hot runner system, including a manifold, a limiting groove is provided on the upper side of the manifold, a connecting groove is provided on the bottom side of the limiting groove, a sprue sleeve is rotatably connected to the upper side of the limiting groove, a slot is provided at the eccentric position on the bottom side of the sprue sleeve, a multi-cavity nozzle mechanism is provided on the lower side of the manifold, and an injection driving mechanism for rotating the sprue sleeve is provided on the upper side of the sprue sleeve.

[0006] Preferably, the multi-cavity nozzle mechanism includes a plurality of hot nozzles mounted on the flow divider plate, and a culvert is connected between one side of each hot nozzle and the lower end of the connecting groove.

[0007] Preferably, the injection driving mechanism includes a plurality of first straight slide grooves opened inside the sprue sleeve, the lower end of each first straight slide groove is connected to a spiral slide groove opened inside the sprue sleeve, the lower end of each spiral slide groove is connected to a second straight slide groove opened inside the sprue sleeve, and a rod-type driving mechanism for rotating the sprue sleeve is provided inside the sprue sleeve.

[0008] Preferably, the plug-in drive mechanism includes a nozzle that is fitted to the inner side of the sprue sleeve, the nozzle is mounted with an injection molding machine mounting plate, a push rod mechanism is provided on the outer side of the nozzle, and a pipe connecting mechanism is provided on the lower side of the nozzle.

[0009] Preferably, the push rod mechanism includes a plurality of pointer push rods fixedly connected to the outside of the nozzle, the plurality of pointer push rods being arranged in a circumferential array, the plurality of pointer push rods being paired with a plurality of first straight sliding grooves, and one end of the pointer push rods being slidably connected to the inner side of the paired first straight sliding groove.

[0010] Preferably, the pipe connection mechanism includes an injection tube that communicates with the lower side of the nozzle. The injection tube is configured to cooperate with the slot, and when the injection tube is inserted into the slot, the lower end of the injection tube communicates with the upper end of the communication groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses a pointer push rod inserted into a spiral groove to drive the gate sleeve to rotate, thereby enabling the connecting groove and the slot to be connected or staggered and blocked. When the melting temperature is too high or the gate is not cooled sufficiently, the blocking can prevent the hot nozzle from flowing back and reduce material waste. This invention achieves the function of sealing or injection molding of hot runner by rotating the sprue sleeve inside the upper limit groove of the manifold. It has the advantages of simple structure, practicality and easy maintenance. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of a connecting device for a hot runner system provided by this utility model; Figure 2 This is a schematic diagram of the nozzle and pointer push rod in one embodiment of the present invention; Figure 3 This is a cross-sectional view of the diverter plate and culvert in one embodiment of the present invention; Figure 4 This is a cross-sectional view of the sprue sleeve in one embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the explosion structure.

[0013] Explanation of key symbols: 1. Manifold; 2. Hot nozzle; 3. Injection molding machine mounting plate; 4. Nozzle; 5. Sprue sleeve; 6. Limiting groove; 7. Injection tube; 8. Pointer push rod; 9. No. 1 straight slide groove; 11. Culvert; 12. Connecting groove; 13. Slot; 14. No. 2 straight slide groove; 15. Spiral slide groove. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example

[0015] Please combine Figures 1-3 A connecting device for a hot runner system in this embodiment includes a manifold 1. The hot runner manifold is the core component of the hot runner system. Its main function is to evenly distribute the molten plastic from the main runner nozzle to each injection point, ensuring balanced filling of the mold cavity and balanced heat of the system. Please combine Figure 5 As shown, a limiting groove 6 is provided on the upper side of the diverter plate 1. The limiting groove 6 is a cylindrical groove, and a sealing ring is provided on the upper edge of the limiting groove 6. Please combine Figure 5 As shown, a connecting groove 12 is provided on the bottom side of the limiting groove 6. In this embodiment, the connecting groove 12 is vertically formed. Please combine Figure 5 As shown, a sprue sleeve 5 is rotatably connected to the upper side of the limiting groove 6. In this embodiment, the sprue sleeve 5 is a cylindrical structure with a hollow interior. Please combine Figure 4 As shown, a slot 13 is provided at the eccentric position on the bottom side of the sprue sleeve 5. The slot 13 has a conical groove structure, which has good sealing performance and prevents overflow. It is compatible with the bottom structure of the injection tube 7. Please combine Figure 4 As shown, a multi-cavity nozzle mechanism is provided on the lower side of the manifold 1, and an injection driving mechanism for rotating the sprue sleeve 5 is provided on the upper side of the sprue sleeve 5.

[0016] Please combine Figure 1 As shown, in this embodiment, the multi-cavity nozzle mechanism includes two hot nozzles 2 installed on the manifold 1. The hot nozzles 2 are equipped with needle valves. In this embodiment, the hot runner is controlled by mechanical pneumatic or hydraulic control of the valve needle movement. Its core components include valve needle and nozzle. The injection cycle is optimized by controlling the gate closure. Please combine Figure 4 As shown, a culvert 11 is connected between one side of each hot nozzle 2 and the lower end of the connecting groove 12. In this embodiment, two culverts 11 are provided and connected to the connecting groove 12. In other embodiments, the number of hot nozzles can be adjusted according to the number of hot nozzles. Please combine Figure 4 As shown, in this embodiment, the injection driving mechanism includes two first straight slide grooves 9 opened inside the sprue sleeve 5. The lower end of each first straight slide groove 9 is connected to a spiral slide groove 15 opened inside the sprue sleeve 5. The lower end of each spiral slide groove 15 is connected to a second straight slide groove 14 opened inside the sprue sleeve 5. A rod-type driving mechanism for rotating the sprue sleeve 5 is provided inside the sprue sleeve 5.

[0017] It should be noted that when the pointer push rod 8 moves down the first straight slide 9, the sprue sleeve 5 does not rotate. At this time, it is in the initial state, and the ports of the connecting groove 12 and the slot 13 are misaligned and blocked, so the hot runner pipeline cannot be connected. When the pointer push rod 8 moves down in the spiral slide 15, the sprue sleeve 5 rotates, and the ports of the connecting groove 12 and the slot 13 are aligned with each other. At this time, the hot runner system pipeline is not yet fully connected and closed, and the injection molding process cannot be started. When the pointer push rod 8 slides from the spiral slide 15 into the second straight slide 14, the sprue sleeve 5 does not rotate, and the injection tube 7 continues to descend until it is fully inserted into the slot 13. At this time, the hot runner system pipeline is fully connected and the injection molding process can be started. Please combine Figure 1 As shown, the plug-in drive mechanism includes a nozzle 4 that is fitted to the inner side of the sprue sleeve 5. The nozzle 4 is mounted on an injection molding machine mounting plate 3. The nozzle 4 is mounted on the injection molding machine push module through the injection molding machine mounting plate 3, so as to realize the insertion and removal of the nozzle 4. Please combine Figure 2 As shown, a push rod mechanism is provided on the outer side of the nozzle 4, and a pipe connecting mechanism is provided on the lower side of the nozzle 4.

[0018] Please combine Figure 2 As shown, the push rod mechanism includes two pointer push rods 8 fixedly connected to the outside of the nozzle 4. The two pointer push rods 8 are arranged in a circular array. The two pointer push rods 8 are paired with two first straight slide grooves 9, and one end of the pointer push rod 8 is slidably connected to the inner side of the paired first straight slide groove 9.

[0019] Please combine Figure 2 As shown, the pipe connection mechanism includes an injection tube 7 that is connected to the lower side of the nozzle 4. It should be noted that the upper end of the injection tube 7 is provided with a tapered boss that is adapted to the groove structure of the slot 13, which can provide airtightness during injection molding and prevent leakage. Please combine Figure 2 As shown, the injection tube 7 is configured to cooperate with the slot 13, and when the injection tube 7 is inserted into the slot 13, the lower end of the injection tube 7 is connected to the upper end of the connecting groove 12.

[0020] The implementation principle of the connecting device for a hot runner system in this embodiment is as follows: When injection molding is started, the injection molding machine pushes the nozzle 4 into the sprue sleeve 5 through the injection molding machine mounting plate 3. When the pointer push rod 8 on the side of the nozzle 4 is inserted into the first straight slide groove 9 and the spiral slide groove 15, it pushes the sprue sleeve 5 to rotate, so that the lower port of the slot 13 at the bottom of the sprue sleeve 5 is aligned with the upper port of the connecting groove 12. At this time, the pointer push rod 8 continues to descend and slides into the second straight slide groove 14 and moves in a straight line. When the pointer push rod 8 moves to the bottom of the second straight slide groove 14, the injection tube 7 is fully inserted into the slot 13, and the lower end of the injection tube 7 is connected to the connecting groove 12, realizing the hot runner connection. At this time, the molten plastic particles can flow to each hot nozzle 2.

[0021] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A connecting device for a hot runner system, comprising a manifold (1), characterized in that, The upper side of the manifold (1) is provided with a limiting groove (6), the bottom side of the limiting groove (6) is provided with a connecting groove (12), the upper side of the limiting groove (6) is rotatably connected with a sprue sleeve (5), the bottom side of the sprue sleeve (5) is provided with a slot (13) at an eccentric position, the lower side of the manifold (1) is provided with a multi-cavity nozzle mechanism, and the upper side of the sprue sleeve (5) is provided with an injection driving mechanism that makes the sprue sleeve (5) rotate.

2. The connecting device for a hot runner system as described in claim 1, characterized in that, The multi-cavity nozzle mechanism includes a plurality of hot nozzles (2) mounted on the flow divider (1), and a culvert (11) is connected between one side of each hot nozzle (2) and the lower end of the connecting groove (12).

3. The connecting device for a hot runner system as described in claim 1, characterized in that, The injection driving mechanism includes a plurality of first straight grooves (9) opened inside the sprue sleeve (5). The lower end of each first straight groove (9) is connected to a spiral groove (15) opened inside the sprue sleeve (5). The lower end of each spiral groove (15) is connected to a second straight groove (14) opened inside the sprue sleeve (5). The sprue sleeve (5) is provided with a rod-type driving mechanism that rotates the sprue sleeve (5).

4. A connecting device for a hot runner system as described in claim 3, characterized in that, The plug-in drive mechanism includes a nozzle (4) that is fitted to the inner side of the sprue sleeve (5). The nozzle (4) is equipped with an injection molding machine mounting plate (3). A push rod mechanism is provided on the outer side of the nozzle (4). A pipe connection mechanism is provided on the lower side of the nozzle (4).

5. A connecting device for a hot runner system as described in claim 4, characterized in that, The push rod mechanism includes multiple pointer push rods (8) fixedly connected to the outside of the nozzle (4). The multiple pointer push rods (8) are arranged in a circular array. The multiple pointer push rods (8) are paired with multiple first straight slide grooves (9), and one end of the pointer push rod (8) is slidably connected to the inner side of the paired first straight slide groove (9).

6. A connecting device for a hot runner system as described in claim 4, characterized in that, The pipe connection mechanism includes an injection tube (7) that communicates with the lower side of the nozzle (4). The injection tube (7) is configured to cooperate with the slot (13). When the injection tube (7) is inserted into the slot (13), the lower end of the injection tube (7) is connected to the upper end of the connecting groove (12).

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