Mixing head and injection molding equipment

Abstract

The utility model discloses a mixing head and injection molding equipment. The mixing head comprises a sleeve and a mixing core, an emergent hole is formed in the front end of the sleeve, and the sleeve is provided with a containing cavity; the mixing core is arranged in the accommodating cavity in a penetrating manner and is provided with a side wall, the side wall encloses a sizing material channel, the sizing material channel penetrates through the rear end of the mixing core, the side wall is provided with a plurality of spraying holes, and the spraying holes are communicated with the sizing material channel and the accommodating cavity so that molten sizing materials can flow to the accommodating cavity from the sizing material channel; the side wall is in threaded fit with the inner wall of the accommodating cavity, so that the sleeve and the mixing core are detachably fixed. The injection holes are formed in the side wall of the mixing core, molten rubber materials flowing into the rubber material channel need to pass through the injection holes and then enter the containing cavity, the molten rubber materials bear large extrusion force when passing through the injection holes, the extrusion force is beneficial to damaging bubbles of the molten rubber materials, and therefore the mixing effect is enhanced, and the injection molding quality is improved. In addition, the side wall is detachably matched with the inner wall of the containing cavity through thread fit, so that the mixing core is convenient to replace, and the sleeve is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a mixing head and injection molding equipment. Background Art

[0002] Injection molding equipment is the main molding equipment that uses plastic molding molds to make molten rubber into plastic products of various shapes. Its working principle is similar to that of a syringe for injection. With the help of the thrust of the screw or plunger, the plasticized molten state, i.e., the viscous flow state, is injected into the closed mold cavity, and the product is obtained after solidification and shaping. Injection molding equipment has the advantage of being able to mold plastic products with complex shapes, precise dimensions, or dense textures with metal inserts. It has been widely used in national defense, electromechanics, automobiles, transportation, building materials, packaging, agriculture, culture, education, health, and people's daily life. The mixing head is an important component of the injection molding equipment and can be installed on the head of the screw seat to remove bubbles. However, the existing mixing head only has the function of guiding the injection of molten rubber, and its function is single. Summary of the invention

[0003] The utility model aims to provide a mixing head to solve the problem of poor mixing effect of injection molding equipment in the prior art.

[0004] The second purpose of the utility model is to provide an injection molding device.

[0005] To achieve the first purpose, the utility model provides a mixing head, which includes a sleeve and a mixing core; an outlet hole is arranged at the front end of the sleeve, and the sleeve has a accommodating chamber, and the accommodating chamber connects the outlet hole and the rear end of the sleeve; the mixing core is inserted into the accommodating chamber, and the mixing core is provided with a side wall, and the side wall encloses a rubber channel, and the rubber channel passes through the rear end of the mixing core, and the side wall is provided with a plurality of injection holes, and the injection holes connect the rubber channel and the accommodating chamber so that molten rubber can flow from the rubber channel to the accommodating chamber; the side wall is threadedly matched with the inner wall of the accommodating chamber to realize detachable fixation of the sleeve and the mixing core.

[0006] As a preferred embodiment, the accommodating chamber has a first mating section and a second mating section that are connected; the first mating section is arranged on the rear side of the accommodating chamber, and the second mating section is arranged between the first mating section and the injection hole and its inner diameter is smaller than the inner diameter of the first mating section; the side wall of the mixing core has a threaded fixing portion and an extension portion protruding forward from the threaded fixing portion; the threaded fixing portion is threadedly matched with the first mating section; the extension portion is penetrated by the second mating section and the injection hole is arranged on the extension portion.

[0007] As a preferred solution, the rear end cross-section of the rubber channel is polygonal.

[0008] As a preferred embodiment, the extension portion has a plurality of strip-shaped grooves formed by being recessed from the outside to the inside, and the plurality of strip-shaped grooves extend in the front-to-back direction and are arranged at intervals along the outer circumference of the side wall; each of the injection holes has an inlet and an outlet, and the inlet and the outlet are respectively connected to the rubber channel and the corresponding strip-shaped groove.

[0009] As a preferred solution, on a projection plane perpendicular to the front-rear direction, the extension direction of the injection hole forms an angle with respect to a tangent line of the inner wall of the rubber channel at the corresponding incident port.

[0010] As a preferred solution, in the front-to-back direction, a plurality of rows of the injection holes are arranged on the side wall of the mixing core, and on a projection plane perpendicular to the front-to-back direction, the injection holes in two adjacent rows intersect with each other.

[0011] As a preferred solution, the mixing core has a cone portion, and the cone portion is connected to the front end of the extension portion.

[0012] As a preferred solution, a boss is provided on the outer wall of the sleeve, and the cross section of the boss is hexagonal.

[0013] To achieve the second purpose, the utility model provides an injection molding device, which includes a screw seat and the aforementioned mixing head, wherein the mixing head is installed at the front end of the screw seat.

[0014] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0015] In the utility model, a mixing core is arranged in the sleeve, and a plurality of injection holes are arranged on the side wall of the mixing core. By arranging the injection holes on the side wall of the mixing core. During the operation of the injection molding equipment, the molten rubber flowing into the rubber channel needs to pass through the injection holes and then enter the accommodating cavity. When the molten rubber passes through the injection holes, it will be subjected to a large extrusion force, which is conducive to destroying the bubbles of the molten rubber, thereby enhancing the mixing effect and improving the injection molding quality. In addition, the side wall and the inner wall of the accommodating cavity are detachably matched through threaded matching. That is, the mixing core can be taken out from the sleeve, which is convenient for replacing the mixing core and cleaning the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, 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 the structures shown in these drawings without paying creative work.

[0017] Figure 1It is a schematic diagram of a mixing head in the utility model;

[0018] Figure 2 It is a cross-sectional view of a mixing head in the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the mixing core in the utility model;

[0020] Figure 4 It is a side view of the mixing core in the utility model;

[0021] Figure 5 yes Figure 4 The cross-sectional view formed by cutting along the AA direction;

[0022] Figure 6 It is a schematic diagram of the screw seat in the utility model

[0023] Description of Figure Numbers:

[0024] 1. Sleeve; 11. Accommodating chamber; 111. First matching section; 112. Second matching section; 12. Exit hole; 13. Boss; 2. Mixing core; 21. Threaded fixing portion; 22. Extending portion; 221. Injection hole; 222. Strip groove; 223. Rubber material channel; 23. Conical portion; 100. Mixing head; 200. Screw seat. DETAILED DESCRIPTION

[0025] In order to facilitate a better understanding of the purpose, structure, features and efficacy of the utility model, the utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] See also Figure 1-2 The present embodiment provides a mixing head, which can be applied to injection molding equipment to assist in the mixing of molten rubber. The mixing head includes a sleeve 1 and a mixing core 2; an outlet hole 12 is provided at the front end of the sleeve 1, and the sleeve 1 has a receiving chamber 11, and the receiving chamber 11 connects the outlet hole 12 and the rear end of the sleeve 1; the mixing core 2 is inserted into the receiving chamber 11, and the mixing core 2 is provided with a side wall, which is annular and encloses a rubber channel 223, and the rubber channel passes through the rear end of the mixing core 2 to allow the molten rubber to flow in from the back to the front. The side wall is provided with a plurality of injection holes 221, and the injection holes 221 connect the rubber channel and the receiving chamber 11, so that the molten rubber can flow from the rubber channel to the receiving chamber 11. The side wall is threadedly matched with the inner wall of the receiving chamber 11 to realize the detachable fixation of the sleeve 1 and the mixing core 2. By setting a plurality of injection holes 221 on the side wall of the mixing core 2, the molten rubber flowing into the rubber channel needs to pass through the injection holes 221 and then enter the accommodating chamber 11. When passing through the injection holes 221, the molten rubber will be subjected to a large extrusion force, which is conducive to destroying the bubbles of the molten rubber, thereby enhancing the mixing effect and improving the injection molding quality. In addition, the side wall and the inner wall of the accommodating chamber 11 are detachably matched through threaded matching. That is, the mixing core 2 can be taken out from the sleeve 1, which is convenient for replacing the mixing core 2 and cleaning the sleeve 1.

[0028] See also Figure 1-2In one embodiment, the accommodating chamber 11 has a first matching section 111 and a second matching section 112 connected front and back; the first matching section 111 is arranged at the rear side of the accommodating chamber 11, and is provided with an internal thread matching the mixing core 2. The second matching section 112 is arranged between the first matching section 111 and the injection hole 221, and its inner diameter is smaller than the inner diameter of the first matching section 111, that is, a step is formed between the first matching section 111 and the second matching section 112, which is convenient for limiting the front and rear position of the mixing core 2. The side wall of the mixing core 2 has a threaded fixing portion 21 and an extension portion 22 formed by protruding forward from the threaded fixing portion 21; the threaded fixing portion 21 is threadedly matched with the first matching section 111; the threaded fixing portion 21 is connected to the first matching section 111, the extension portion 22 is also arranged in the second matching section 112, and the injection hole 221 is arranged in the extension portion 22. In this embodiment, the rear end cross section of the rubber channel is hexagonal. In this way, it is convenient to use a tool to rotate the mixing core 2 so that the mixing core 2 can be taken out of the sleeve 1. In other embodiments, the cross-section of the rear end of the glue channel may be other polygonal shapes.

[0029] like Figure 3-5 In one embodiment, the outer wall of the extension portion 22 is transitionally matched with the second matching section 112. The extension portion 22 has a plurality of strip grooves 222 formed by being recessed from the outside to the inside, and the plurality of strip grooves 222 extend in the front-to-back direction and are arranged at intervals along the outer circumference of the side wall. The strip grooves 222 form a flow channel between the injection hole 221 and the outlet hole 12. Each injection hole 221 has an inlet and an outlet, and the inlet and the outlet are arranged opposite to each other, respectively connecting the rubber channel and the corresponding strip groove 222.

[0030] like Figure 3-5 In one embodiment, on a projection plane perpendicular to the front-rear direction, the extending direction of the injection hole 221 forms an angle with respect to the tangent line of the inner wall of the rubber channel at the corresponding entrance. This arrangement is conducive to the rubber ejected from the exit to hit the groove wall of the strip groove 222, which is conducive to further destroying bubbles and particles in the molten rubber. Of course, in other embodiments, the extending direction of the injection hole 221 may be perpendicular to the tangent line of the inner wall of the rubber channel at the corresponding entrance. In this embodiment, the extending direction of the injection hole 221 is perpendicular to the front-rear direction.

[0031] like Figure 3-5 In one embodiment, in the front-to-back direction, the side wall of the kneading core 2 is provided with multiple rows of injection holes 221, and on the projection plane perpendicular to the front-to-back direction, the injection holes 221 of two adjacent rows intersect each other. That is, the molten rubber passing through the two adjacent rows of injection holes 221 is respectively sprayed in the positive rotation direction and the reverse rotation direction, so that the molten rubber is mixed and stirred in the strip groove 222, thereby improving the injection molding effect. In this embodiment, on the projection plane perpendicular to the front-to-back direction, the angle between the extension direction of the injection hole 221 and the tangent line of the inner wall of the rubber channel at the corresponding incident port is 20° to 40°.

[0032] like Figure 3-5 In one embodiment, the mixing core 2 has a cone portion, which is connected to the front end of the extension portion 22 and can play a drainage role.

[0033] like Figure 3-5 In one embodiment, a boss 13 is provided on the outer wall of the sleeve 1, and the cross section of the boss 13 is hexagonal. Such a configuration facilitates the tool to limit the circumferential direction of the sleeve 1, so that the sleeve 1 and the screw seat can be disassembled and assembled.

[0034] like Figure 6 As shown, the utility model also provides an injection molding device, which includes a screw seat 200 and the aforementioned mixing head 100, and the mixing head 100 is installed at the front end of the screw seat 200. The molten rubber is stirred forward by the screw and flows to the rubber channel and the accommodating chamber 11 in sequence, and finally flows forward through the exit hole 12 of the sleeve 1.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mixing head, characterized in that: It comprises a sleeve and a mixing core; an ejection hole is arranged at the front end of the sleeve, and the sleeve has a accommodating chamber, and the accommodating chamber connects the ejection hole and the rear end of the sleeve; the mixing core is inserted into the accommodating chamber, and the mixing core is provided with a side wall, and the side wall encloses a rubber channel, and the rubber channel passes through the rear end of the mixing core, and the side wall is provided with a plurality of injection holes, and the injection holes connect the rubber channel and the accommodating chamber so that the molten rubber flows from the rubber channel to the accommodating chamber; the side wall is threadedly matched with the inner wall of the accommodating chamber to realize the detachable fixation of the sleeve and the mixing core.

2. A mixing head as claimed in claim 1, characterized in that: The accommodating chamber has a first mating section and a second mating section that are connected; the first mating section is arranged at the rear side of the accommodating chamber, and the second mating section is arranged between the first mating section and the injection hole and its inner diameter is smaller than the inner diameter of the first mating section; the side wall of the mixing core has a threaded fixing portion and an extension portion protruding forward from the threaded fixing portion; the threaded fixing portion is threadedly matched with the first mating section; the extension portion is penetrated by the second mating section and the injection hole is arranged on the extension portion.

3. A mixing head as claimed in claim 2, characterized in that: The rear end section of the rubber channel is polygonal.

4. A mixing head as claimed in claim 2, characterized in that: The extension portion has a plurality of strip-shaped grooves that are recessed from the outside to the inside, and the plurality of strip-shaped grooves extend in the front-to-back direction and are arranged at intervals along the outer circumference of the side wall; each of the injection holes has an inlet and an outlet, and the inlet and the outlet are respectively connected to the rubber channel and the corresponding strip-shaped groove.

5. A mixing head as claimed in claim 3, characterized in that: On a projection plane perpendicular to the front-rear direction, the extension direction of the injection hole forms an angle with respect to a tangent line of the inner wall of the rubber channel at the corresponding incident port.

6. A mixing head as claimed in claim 5, characterized in that: In the front-to-back direction, the side wall of the kneading core is provided with a plurality of rows of the injection holes, and on a projection plane perpendicular to the front-to-back direction, the injection holes in two adjacent rows intersect with each other.

7. A mixing head as claimed in claim 2, characterized in that: The kneading core has a tapered portion connected to the front end of the extending portion.

8. A mixing head as claimed in claim 1, characterized in that: A boss is arranged on the outer wall of the sleeve, and the cross section of the boss is hexagonal.

9. An injection molding device, characterized in that: The invention comprises a screw seat and a mixing head as claimed in any one of claims 1 to 8, wherein the mixing head is installed at the front end of the screw seat.

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