Injection molding spray head structure of rubber coating mold

Abstract

The injection molding spray head structure comprises a connecting pipe and a spray head, one side of the connecting pipe is fixedly connected with a first external thread pipe, a first internal thread pipe is arranged between the connecting pipe and the spray head, and a coarse filtering sieve plate is connected into the first internal thread pipe in a sliding mode. A thread at one end of the first external thread pipe extends into the first internal thread pipe, and one end of the first external thread pipe is in contact with the coarse filtering sieve plate. According to the injection molding spray head structure of the rubber coating mold, large-size impurities and small-size impurities in injection molding materials can be filtered through the coarse filtering sieve plate and the fine filtering box which are arranged between the connecting pipe and the spray head, the large-size impurities can be effectively prevented from directly entering the fine filtering box through double filtering, and the filtering effect on the injection molding materials is better; meanwhile, the trafficability of injection molding materials is improved, and the injection molding quality can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding nozzles, in particular to an injection molding nozzle structure of a rubber-coated mold. Background Art

[0002] The overmolding mold is a type of injection mold, which is used to realize the secondary injection molding of the workpiece to be processed. The workpiece to be processed has undergone the first injection molding and has an inner plastic layer; the overmolding mold is used to realize the injection molding of the workpiece to be processed on the outer plastic layer; after the overmolding mold is processed, two plastic layers can be formed on the surface of the workpiece to meet the requirements of the engineering environment for different performances of the workpiece inside and on the surface. The overmolding mold will use an injection nozzle when it is used.

[0003] The publication number CN 108237665 A discloses an injection nozzle for a rubber mold, including an upper tube body and a lower tube body, the upper tube body and the lower tube body are connected from top to bottom, a filter device is arranged between the upper tube body and the lower tube body, the filter device includes a filter tube, the upper end of the filter tube is opened, the upper end of the filter device is connected to a first threaded tube, a second threaded tube is arranged above the first threaded tube, a thread is arranged on the outer wall between the first threaded tube and the second threaded tube, the thread is adapted to the thread of the upper tube body and the lower tube body, a horizontal annular fixing ring is arranged at the connection between the first threaded tube and the second threaded tube and protrudes from the outer wall of the first threaded tube and the second threaded tube, the opening at the upper end of the filter tube penetrates the first threaded tube and the second threaded tube, a plurality of filter holes are arranged on the side wall and the bottom of the filter tube, the filter tube is placed in the lower tube body, and a cavity is arranged between the outer wall of the filter tube and the inner wall of the lower tube body. The invention filters out larger particle impurities, improves product quality, and reduces product surface defects.

[0004] However, the injection molding nozzle has the following shortcomings: its nozzle structure can filter large particles of impurities in the injection molding material through a filtering device, and its filtering device can only filter the injection molding material once, so that it needs to filter large particles and small particles at the same time. However, the number of large-volume impurities in the injection molding material is often less than that of small-volume impurities, which makes it easy for the filtering device to be completely blocked by large-volume impurities, thereby affecting the use effect.

[0005] To this end, the utility model provides an injection nozzle structure of a rubber-coated mold to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an injection nozzle structure for a rubber-coated mold to solve the above problems.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: an injection molding nozzle structure of a rubber-coated mold, comprising a connecting tube and a nozzle, one side of the connecting tube is fixedly connected to a first externally threaded tube, a first internally threaded tube is arranged between the connecting tube and the nozzle, a coarse filter screen plate is slidably connected to the first internally threaded tube, one end of the first externally threaded tube is threadedly extended into the first internally threaded tube, one end of the first externally threaded tube is in contact with the coarse filter screen plate, one end of the first internally threaded tube is fixedly connected to a fine filter box, one end of the fine filter box extends into the nozzle, a plurality of filter holes are provided on the fine filter box, a second externally threaded tube is fixedly sleeved on the outer wall of the fine filter box, one end of the nozzle is fixedly connected to a second internally threaded tube, one end of the second externally threaded tube is threadedly extended into the second internally threaded tube.

[0008] Preferably, one end of the nozzle is fixedly connected to a conical head, and a narrowing opening is provided on the conical head. The conical head and the narrowing opening are used in combination to facilitate pressurization of the injection molding material and facilitate its injection.

[0009] Preferably, an extension head is fixedly connected to the conical head, and a perforation is provided on the extension head, and the perforation is connected to the inside of the narrowed mouth. The extension head and the perforation are used together to conveniently inject the injection plastic into the overmolding mold, which is convenient to use.

[0010] Preferably, a partition is fixedly connected in the narrowed opening, and a pressurizing hole is opened on the partition. The partition and the pressurizing hole are used together to facilitate pressurization of the flowing injection material, thereby facilitating the injection molding process.

[0011] Preferably, one end of the connecting pipe is fixedly connected to a third externally threaded pipe, and the third externally threaded pipe can be conveniently connected to the injection molding machine to facilitate injection molding processing.

[0012] Preferably, the outer wall fixing sleeve of the connecting pipe is provided with a first hexagonal wrench sleeve, and the outer wall fixing sleeve of the nozzle is provided with a second hexagonal wrench sleeve. By using the first hexagonal wrench sleeve and the second hexagonal wrench sleeve in combination, the connecting pipe and the nozzle can be conveniently disassembled and assembled, which is convenient for use.

[0013] Preferably, the outer wall fixing sleeve of the first internally threaded tube is provided with an anti-slip sleeve, and the anti-slip sleeve is made of rubber material. The anti-slip sleeve can facilitate the operator to twist the first internally threaded tube, thereby facilitating the disassembly and assembly of the coarse filter screen plate and the fine filter box.

[0014] Beneficial Effects

[0015] The utility model provides an injection nozzle structure for a rubber-coated mold. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The injection nozzle structure of the overmolding mold can filter large-volume impurities and small-volume impurities in the injection molding material respectively through the coarse filter screen plate and the fine filter box arranged between the connecting pipe and the nozzle. The double filtration can effectively prevent large-volume impurities from directly entering the fine filter box, thereby achieving a better filtering effect on the injection molding material and improving the permeability of the injection molding material, thereby effectively improving the injection molding quality.

[0017] (2) The injection nozzle structure of the overmolding mold can facilitate the disassembly and assembly of the coarse filter screen plate and the fine filter box by setting a split connecting pipe, a first internally threaded pipe and a nozzle, and replace the spare coarse filter screen plate and the fine filter box, so that the interior can be easily cleaned without affecting the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0020] Figure 3 It is a schematic cross-sectional view of the fine filter box in the utility model;

[0021] Figure 4 It is a schematic cross-sectional structural diagram of the nozzle in the utility model.

[0022] In the figure: 1. connecting pipe; 2. nozzle; 3. first externally threaded pipe; 4. first internally threaded pipe; 5. coarse filter screen; 6. fine filter box; 7. filter hole; 8. second externally threaded pipe; 9. second internally threaded pipe; 10. conical head; 11. narrowing mouth; 12. extension head; 13. perforation; 14. partition; 15. pressurized hole; 16. third externally threaded pipe; 17. first hexagonal wrench set; 18. second hexagonal wrench set; 19. anti-slip sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figures 1 to 4, an injection nozzle structure of a rubber-coated mold, comprising a connecting pipe 1 and a nozzle 2, a first externally threaded pipe 3 is fixedly connected to one side of the connecting pipe 1, a first internally threaded pipe 4 is arranged between the connecting pipe 1 and the nozzle 2, a coarse filter screen plate 5 is slidably connected to the first internally threaded pipe 4, one end of the first externally threaded pipe 3 is threadedly extended into the first internally threaded pipe 4, one end of the first externally threaded pipe 3 is in contact with the coarse filter screen plate 5, one end of the first internally threaded pipe 4 is fixedly connected to a fine filter box 6, one end of the fine filter box 6 extends into the nozzle 2, a plurality of filter holes 7 are provided on the fine filter box 6, a second externally threaded pipe 8 is fixedly sleeved on the outer wall of the fine filter box 6, one end of the nozzle 2 is fixedly connected to a second internally threaded pipe 9, one end of the second externally threaded pipe 8 is threadedly extended into the second internally threaded pipe 9.

[0026] Embodiment 2:

[0027] See also Figures 1 to 4 This embodiment provides a technical solution based on the first embodiment: a conical head 10 is fixedly connected to one end of the nozzle 2, and a narrowing mouth 11 is provided on the conical head 10; an extension head 12 is fixedly connected to the conical head 10, and a perforation 13 is provided on the extension head 12, and the perforation 13 is connected to the inside of the narrowing mouth 11; a partition 14 is fixedly connected inside the narrowing mouth 11, and a pressurizing hole 15 is provided on the partition 14; a third externally threaded tube 16 is fixedly connected to one end of the connecting tube 1; a first hexagonal wrench sleeve 17 is provided on the outer wall fixing sleeve of the connecting tube 1, and a second hexagonal wrench sleeve 18 is provided on the outer wall fixing sleeve of the nozzle 2; an anti-slip sleeve 19 is provided on the outer wall fixing sleeve of the first internally threaded tube 4, and the anti-slip sleeve 19 is made of rubber material.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] Working principle: When in use, the whole structure is connected to the injection molding machine through the third external threaded tube 16, and the extension head 12 is aligned with the overmolding mold. Then the injection plastic enters the connecting tube 1, and successively passes through the coarse filter screen plate 5 and the fine filter box 6 into the nozzle 2, and after being pressurized through the pressurized hole 15 and the narrowed mouth 11, it is ejected through the perforation 13 for injection molding. The coarse filter screen plate 5 can block large-volume impurities and prevent them from entering the fine filter box 6. At the same time, the fine filter box 6 and the filter hole 7 are used together to filter small-volume impurities in the injection plastic, thereby improving the injection molding quality.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection nozzle structure for a plastic mold, comprising a connecting pipe (1) and a nozzle (2), characterized in that: A first externally threaded tube (3) is fixedly connected to one side of the connecting tube (1); a first internally threaded tube (4) is provided between the connecting tube (1) and the nozzle (2); a coarse filter screen plate (5) is slidably connected to the first internally threaded tube (4); one end of the first externally threaded tube (3) extends into the first internally threaded tube (4) by threading; one end of the first externally threaded tube (3) contacts the coarse filter screen plate (5); one end of the first internally threaded tube (4) is fixedly connected to a fine filter box (6); one end of the fine filter box (6) extends into the nozzle (2); a plurality of filter holes (7) are provided on the fine filter box (6); a second externally threaded tube (8) is fixedly sleeved on the outer wall of the fine filter box (6); one end of the nozzle (2) is fixedly connected to a second internally threaded tube (9); one end of the second externally threaded tube (8) extends into the second internally threaded tube (9) by threading.

2. The injection nozzle structure of the overmolding mold according to claim 1, characterized in that: One end of the nozzle (2) is fixedly connected to a conical head (10), and a narrowing opening (11) is provided on the conical head (10).

3. The injection nozzle structure of the overmolding mold according to claim 2, characterized in that: An extension head (12) is fixedly connected to the conical head (10), and a perforation (13) is provided on the extension head (12), and the perforation (13) is communicated with the interior of the narrowing opening (11).

4. The injection nozzle structure of the overmolding mold according to claim 3, characterized in that: A partition plate (14) is fixedly connected inside the narrowed opening (11), and a pressurizing hole (15) is provided on the partition plate (14).

5. The injection nozzle structure of the overmolding mold according to claim 1, characterized in that: One end of the connecting pipe (1) is fixedly connected to a third externally threaded pipe (16).

6. The injection nozzle structure of the overmolding mold according to claim 1, characterized in that: The outer wall fixing sleeve of the connecting pipe (1) is provided with a first hexagonal wrench sleeve (17), and the outer wall fixing sleeve of the spray head (2) is provided with a second hexagonal wrench sleeve (18).

7. The injection nozzle structure of the overmolding mold according to claim 1, characterized in that: The outer wall fixing sleeve of the first internally threaded tube (4) is provided with an anti-slip sleeve (19), and the anti-slip sleeve (19) is made of rubber material.

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