Active glue sealing assembly for screw rocket head group of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machine nozzles, and discloses an injection molding machine screw rocket head group active glue sealing assembly which comprises a rocket head body, the rocket head body comprises a conical end head, a material guiding section and a connecting section, the tail end of the conical end head is fixedly connected with the material guiding section, the tail end of the material guiding section is fixedly connected with the connecting section, and the connecting section is fixedly connected with the conical end head. The surface of the material guiding section is slidably sleeved with a non-return ring, the surface of the material guiding pipe is sleeved with a spring in a surrounding mode, the two sides of the spring abut against the side, facing the non-return ring, of the conical end and the side, facing the conical end, of the non-return ring respectively, and the surface of the side, located on the non-return ring, of the connecting section is detachably connected with a sealing gasket. According to the utility model, the non-return ring is controlled to reset actively by using the spring force, so that a stable glue sealing opportunity is achieved, the reproducibility stability of the injection molding quantity is effectively improved, and the yield of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine nozzle technical field, concretely is injection molding machine screw rocket head group active type glue sealing subassembly. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic products, usually installed on injection molding machine and used, and the heated and melted plastic raw materials are injected into the mold cavity of injection mold through the nozzle of injection molding machine by high pressure, and the finished product is obtained after cooling and solidification.

[0003] In injection molding equipment, the rocket head in injection molding is the key component of plastic molding product quality, and the glue sealing subassembly of injection molding machine screw rocket head group is the key accessory combination located at the head part of injection molding machine screw, mainly comprising glue sealing intermediate, check ring and glue sealing ring. The glue sealing intermediate is tightly matched with the screw head and the inner wall of the barrel, to realize the preliminary sealing and directional conveying of the glue and prevent its backflow. The check ring prevents the glue from flowing backward after injection to ensure accurate mold injection. The glue sealing ring cooperates with other components to enhance the sealing effect, prevent the glue from leaking out of the leakage passage of the screw head under high pressure, and together ensure the sealing and stability of the glue during injection molding, so that the injection molding can be smoothly carried out.

[0004] The existing glue sealing device of the screw in the injection molding machine pipe realizes the glue sealing action by the displacement of the screw during the injection action. In this process, the glue sealing ring or check ring is in a free state, and the glue flow cannot be timely blocked, resulting in unstable reproducibility of injection amount. Therefore, the active type glue sealing subassembly of injection molding machine screw rocket head group is proposed. Utility model content

[0005] The main purpose of the utility model is to provide an active type glue sealing subassembly of injection molding machine screw rocket head group, which uses spring force to control the active reset of check ring, to achieve stable glue sealing time, effectively improve the reproducibility stability of injection amount, improve product yield, and effectively solve the problems in the background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an active type glue sealing subassembly of injection molding machine screw rocket head group, comprising a rocket head body, the rocket head body comprises a tapered end, a material guiding section and a connecting section, the tapered end is fixedly connected with the material guiding section at the tail end, the material guiding section is fixedly connected with the connecting section at the tail end, a check ring is slidably sleeved on the surface of the material guiding section, a spring is sleeved around the surface of the material guiding section, and the two sides of the spring are respectively in abutment with one side of the tapered end facing the check ring and one side of the check ring facing the tapered end, a glue sealing gasket is detachably connected to the surface of one side of the check ring, and a material guiding groove is horizontally formed in the corresponding position of the surface of the tapered end and the material guiding section.

[0007] Preferably, the guide groove is located at one end of the sealing rubber gasket and a transition groove is formed, a sealing block is fixedly connected to the inner side wall of the check ring and corresponds to the position of the guide groove, and the sealing block is matched with the transition groove.

[0008] Preferably, a conical ring is fixedly connected to the side surface of the sealing rubber gasket facing the check ring, and one side of the conical ring is matched with the check ring.

[0009] Preferably, a connecting thread is formed on the surface of the connecting section.

[0010] Preferably, a wear-resistant coating is coated on the surface of the rocket head body.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses a spring, check ring and sealing gasket cooperate with each other, when the injection molding machine executes the material storage action, utilizes the plastic transmission force that the screw rod stored time generates and makes check ring move to left side and opens the guide groove between check ring and sealing rubber gasket, and the melted plastic flows from right side to left side, and the screw rod is pushed to right side by plastic transmission force at this moment, reaches the purpose of material pipe storage, when the injection molding machine stops the material storage action, utilizes the spring force of spring and makes check ring move to right side and sticks together with sealing rubber gasket, like this, seals the guide groove and reaches the purpose of sealing rubber, the utility model discloses the spring force control overglaze ring or check ring active reset, reaches the stable sealing rubber time, and then effectively improves injection molding quantity reproducibility stability, improves product yield, and simultaneously through the transition groove, sealing block and conical ring cooperate with each other, when the spring force drives check ring to retreat to right side and gradually sticks together with sealing rubber gasket, the sealing block of check ring inner side wall can accurately and accurately realize the clamping of the transition groove of guide groove feeding end, and simultaneously, the conical ring of sealing rubber gasket front end also can be clamped into the inside of check ring, and this trinity sealing structure is like the solid defense line, forms all -round, multilevel sealing to the guide groove feeding end, prevents the leakage possibility of plastic at the part, further improves the overall sealing effect, ensures that the sealing rubber process is absolutely safe, and provides more reliable stability guarantee for injection molding operation. ACCURACY OF DRAWINGS

[0013] Figure 1 It is the overall structure schematic diagram of the utility model;

[0014] Figure 2 It is the structure schematic diagram of the rocket head body of the utility model;

[0015] Figure 3 It is the structure schematic diagram of the check ring of the utility model;

[0016] Figure 4 It is the structure schematic diagram of the sealing rubber gasket of the utility model.

[0017] Fig. 1, rocket head body; 2, conical end; 3, material guide section; 4, connecting section; 5, material guide groove; 6, spring; 7, check ring; 8, glue sealing gasket; 9, transition groove; 10, sealing block; 11, conical ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] EMBODIMENT

[0020] Please refer to Figure 1 - Figure 4 The injection molding machine screw rocket head group active glue sealing assembly in the drawing includes a rocket head body 1, the rocket head body 1 includes a conical end 2, a material guide section 3 and a connecting section 4, the conical end 2 end is fixedly connected with the material guide section 3, the material guide section 3 end is fixedly connected with the connecting section 4, the material guide section 3 surface is slidably sleeved with a check ring 7, the material guide section surface is circumferentially sleeved with a spring 6, and the spring 6 two sides are respectively abutted with the side of the conical end 2 facing the check ring 7 and the side of the check ring 7 facing the conical end 2, the connecting section 4 is detachably connected with a glue sealing gasket 8 on the surface of one side of the check ring 7, and the conical end 2 and the material guide section 3 surface corresponding positions are all transversely provided with a material guide groove 5;Through the ingenious combination of the spring 6 and the check ring 7, the elastic potential energy of the spring 6 and the sliding characteristics of the check ring 7 are utilized, the flexible position switching of the check ring 7 in different injection molding stages is realized, when storing materials, the spring 6 is compressed, the check ring 7 is smoothly moved to the left under the action of plastic transmission force to open the material guide groove 5, the smooth flow of plastic melt is ensured, and after stopping storing materials, the spring 6 releases elastic force to push the check ring 7 to reset to the right and abut with the glue sealing gasket 8, high-efficiency glue sealing is achieved, thereby effectively controlling the flow direction of plastic melt, improving the accuracy and stability of the injection molding process, and reducing product defects caused by melt leakage or backflow.

[0021] The material guide groove 5 is provided with a transition groove 9 at one end of the glue sealing gasket 8, the inner side wall of the check ring 7 and the corresponding position of the material guide groove 5 are fixedly connected with a sealing block 10, and the sealing block 10 is matched with the transition groove 9;With the accurate matching structure of the sealing block 10 and the transition groove 9, in the glue sealing process of the check ring 7 reset, the sealing block 10 can be accurately embedded in the transition groove 9, through this close mechanical cooperation, the reliable sealing of the feeding end of the material guide groove 5 is realized, the trace leakage of plastic melt at the key part is effectively prevented, and the sealing performance of the glue sealing assembly as a whole is further improved.

[0022] The side surface of the sealing rubber gasket 8 facing the check ring 7 is fixedly connected with a conical ring 11, and the side of the conical ring 11 is matched with the check ring 7; by using the matching structure of the conical ring 11 and the check ring 7, when the check ring 7 is attached to the sealing rubber gasket 8, the conical ring 11 can be deeply inserted into the check ring 7 to form an additional sealing interface, by increasing the sealing contact area and the number of sealing layers, the sealing of the plastic melt is more tightly blocked, and the sealing reliability of the sealing assembly in the high-pressure injection environment is significantly improved.

[0023] The surface of the connecting section 4 is provided with a connecting thread, and the surface of the rocket head body 1 is coated with a wear-resistant coating; by the connecting thread design of the connecting section 4, the stable connection between the rocket head body 1 and the screw rod or other related parts is realized, and when the equipment is maintained or the parts are replaced, the rocket head body 1 can be easily disassembled, which is convenient for the maintenance, cleaning or replacement of the sealing assembly, improves the maintainability and universality of the equipment, and the wear-resistant coating can significantly reduce the wear and corrosion of the melt on the rocket head body 1, prolonging the service life of the rocket head body 1.

[0024] It needs to be explained that the utility model discloses a screw rocket head group active glue sealing assembly of injection molding machine, and after the injection molding machine starts the material storage program, the screw starts rotating and moves backward, shearing, compacting and conveying the plastic raw material in the cylinder, along with the rotation of the screw, the plastic is gradually heated and melted and forms melt, the plastic transmission force generated when the screw stores material acts on the check ring 7, and this force overcomes the elastic force of the spring 6 to the right of the check ring 7, and the check ring 7 is pushed to move left along the guide section 3, and the guide groove 5 between the check ring 7 and the glue sealing gasket 8 is opened during the left movement of the check ring 7, so that the melted plastic can flow from the right side to the left side of the guide groove 5 and enter the storage area of the material pipe, and at the same time, the screw continuously moves right under the reaction of the plastic transmission force, and the space of the material pipe is released to store more plastic melt, until the preset storage amount is reached, and after the injection molding machine completes the storage action, the screw stops rotating and moving backward, and the plastic transmission force disappears, at this time, the spring force of the spring 6 starts to play a role, and since the spring 6 is in the compressed state before, the elastic potential energy stored is released, and the check ring 7 is pushed to move right, and the check ring 7 gradually approaches the glue sealing gasket 8 during the right movement of the check ring 7, and during this process, the sealing block 10 of the inner wall of the check ring 7 and the transition groove 9 of the feeding end of the guide groove 5 start to approach each other and finally realize clamping, and at the same time, the conical ring 11 at the front end of the glue sealing gasket 8 is also clamped into the check ring 7, the check ring 7 and the glue sealing gasket 8 are tightly fitted, the sealing block 10 and the transition groove 9 and the conical ring 11 and the check ring 7 are tightly matched, and reliable sealing is formed at the feeding end of the guide groove 5, effectively preventing the backflow and leakage of the plastic melt, ensuring the glue sealing effect, and effectively ensuring the stability of the injection molding amount reproducibility and improving the product yield.

[0025] It needs to be explained that in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations.

[0026] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the utility model and are not used to limit the utility model, and various changes and improvements of the utility model fall within the scope of the utility model without departing from the spirit and scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An active sealing assembly for a screw rocket head assembly of an injection molding machine, comprising a rocket head body (1), characterized in that: The rocket head body (1) includes a conical end (2), a guide section (3) and a connecting section (4). The guide section (3) is fixedly connected to the end of the conical end (2), and the connecting section (4) is fixedly connected to the end of the guide section (3). A check ring (7) is slidably sleeved on the surface of the guide section (3), and a spring (6) is sleeved around the surface of the guide section. The two sides of the spring (6) abut against the side of the conical end (2) facing the check ring (7) and the side of the check ring (7) facing the conical end (2), respectively. A sealing gasket (8) is detachably connected to the surface of the connecting section (4) on one side of the check ring (7). A guide groove (5) is laterally opened at the corresponding position on the surface of the conical end (2) and the guide section (3).

2. The active sealing assembly for the injection molding machine screw rocket head group according to claim 1, characterized in that: The guide groove (5) is provided with a transition groove (9) at one end of the sealing gasket (8). A sealing block (10) is fixedly connected to the inner side wall of the check ring (7) at a position corresponding to the guide groove (5), and the sealing block (10) is adapted to the transition groove (9).

3. The active sealing assembly for the injection molding machine screw rocket head group according to claim 1, characterized in that: The sealing gasket (8) has a conical ring (11) fixedly connected to the side of the surface facing the check ring (7), and the side of the conical ring (11) is adapted to the check ring (7).

4. The active sealing assembly for the injection molding machine screw rocket head group according to claim 1, characterized in that: The connecting section (4) has connecting threads on its surface.

5. The active sealing assembly for the injection molding machine screw rocket head group according to claim 1, characterized in that: The surface of the rocket head body (1) is coated with a wear-resistant coating.

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