CN221872980U - Adjustable hot runner injection mold - Google Patents

Abstract

The utility model relates to the field of mold technology, and discloses an adjustable hot runner injection mold, including a mold body, the mold body including an upper mold with a plurality of through holes on the top, and a lower mold with two cavities on the bottom, an injection unit is arranged between the two cavities, the injection unit includes a plurality of flow channels, a blocking piece arranged on the flow channels, and a connecting pipe located at the end of the flow channel, a pipe is arranged on one side of the connecting pipe, one end of the pipe is connected to the connecting pipe, and the other end is connected to the cavity. The utility model allows the heated and melted plastic to flow into the main cavity through the upper mold through-holes and the injection cylinder, and flows to the cavities on both sides through the branch flow channel, and realizes free switching between single-side production and double-side production by adjusting the blocking piece inserted in the middle of the branch flow channel, thereby improving versatility and reducing production costs.

Description

An adjustable hot runner injection mold

Technical Field

The utility model relates to the technical field of molds, in particular to an injection mold with an adjustable hot runner.

Background Art

An injection mold is a tool for producing plastic products. It is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine. After cooling and solidification, a molded product is obtained. Injection molds are divided into two types according to molding characteristics: thermosetting plastic molds and thermoplastic plastic molds. Injection molds can be divided into two types according to the pouring system: cold runner molds and hot runner molds.

Existing hot runner injection molds are usually designed in an integrated manner, which has relatively poor versatility. Different molds are required to inject different products, and there are no common parts that can be shared, resulting in high mold product costs, increasing the company's R&D investment and the user's purchase cost.

Utility Model Content

The utility model aims to provide an adjustable hot runner injection mold to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable hot runner injection mold, comprising a mold body, the mold body comprising an upper mold with a plurality of through holes on the top, and a lower mold with two cavities on the bottom, an injection unit is arranged between the two cavities, the injection unit comprises a plurality of flow channels, a blocking piece arranged on the flow channels, and a connecting pipe located at the end of the flow channel, a pipe is arranged on one side of the connecting pipe, one end of the pipe is connected to the connecting pipe, and the other end is connected to the cavity.

The following improvement is made in the solution of the present application: the flow channel includes a main flow cavity and two symmetrically arranged branch flow channels, and the branch flow channels are located on both sides of the main flow cavity and extend along the width direction of the lower mold.

The following improvements are made in the present application: the blocking piece is inserted into the runner, including a slideway opened at the bottom of the lower mold, an insert installed in the slideway, and a fixing rod set in the slideway, and the insert is provided with a waist-shaped hole that matches the fixing rod. The insert is moved in the slideway with the fixing rod as a fixed point. When the end of the insert away from the fixing rod is close to the inner wall of the slideway, the runner is normally accessible and bilateral production can be carried out; when the end of the insert close to the fixing rod is close to the inner wall of the slideway, the runner is blocked and only unilateral production can be carried out.

The following improvement is made in the solution of the present application: an injection molding cylinder is connected between the main flow cavity and the through hole.

The following improvement is made in the solution of the present application: the plurality of through holes are arranged along the length direction of the upper mold, and the two cavities are arranged along the length direction of the lower mold.

The following improvement is made in the solution of the present application: the connecting pipe is arranged to extend outwardly perpendicular to the bottom surface of the lower mold, and the pipeline is in an L-shaped structure to connect the connecting pipe with the cavity.

The following improvement is made in the solution of the present application: the bottom surface of the lower mold is arranged in an inwardly concave arc structure.

Compared with the prior art, the utility model provides an adjustable hot runner injection mold, which has the following beneficial effects:

The heated and melted plastic flows into the main cavity through the upper mold through-hole and the injection cylinder, and flows to the cavities on both sides through the branch channel. By adjusting the blocking piece inserted in the middle of the branch channel, free switching between single-sided production and double-sided production can be achieved, thereby improving versatility and reducing production costs.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

Fig. 1 is a schematic diagram of the structure of the utility model;

Fig. 2 is a cross-sectional view of the utility model;

FIG. 3 is a schematic structural diagram of the injection molding unit in the present invention.

In the figure: 1. mold body; 11. through hole; 12. cavity; 2. upper mold; 3. lower mold; 4. injection unit; 41. runner; 411. main cavity; 412. branch runner; 42. blocking piece; 421. slideway; 422. insert; 423. fixing rod; 424. waist-shaped hole; 43. connecting pipe; 44. pipeline; 5. injection cylinder.

DETAILED DESCRIPTION

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.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Example

Referring to Figures 1-3, the utility model provides a technical solution: an adjustable hot runner injection mold, the mold body 1 includes an upper mold 2 and a lower mold 3, the upper mold 2 and the lower mold 3 are combined into a hollow structure; wherein, the top of the upper mold 2 is provided with five through holes 11 along the length direction, the bottom surface of the lower mold 3 is provided with an inwardly concave arc structure, and the bottom is provided with two parallel cavities 12 along the length direction,

An injection unit 4 is provided between the two cavities 12, and is mainly composed of a flow channel 41, a blocking member 42, a connecting pipe 43 and a pipeline 44; there are five flow channels 41, which are arranged along the length direction of the cavity 12, including a main flow cavity 411 and two symmetrically arranged branch flow channels 412, and the two branch flow channels 412 are respectively located on both sides of the main flow cavity 411, extending along the width direction of the lower mold 3, and an injection cylinder 5 is connected between the main flow cavity 411 and the through hole 11; the blocking member 42 is inserted into the branch flow channel 412, and includes a slide 421, an insert 422 and a fixing rod 423, the slide 421 is opened at the bottom of the lower mold 3, the insert 422 is installed in the slide 421, and forms a match with the branch flow channel 412, the fixing rod 423 penetrates and is fixed in the slide 421, and the insert 42 2 is provided with a waist-shaped hole 424 that cooperates with the fixing rod 423. The fixing rod 423 and the waist-shaped hole 424 are matched to enable the insert 422 to move left and right in the slide 421. When the end of the insert 422 away from the fixing rod 423 is close to the inner wall of the slide 421, the diverter channel 412 is normally accessible and bilateral production can be carried out. When the end of the insert 422 close to the fixing rod 423 is close to the inner wall of the slide 421, the diverter channel 412 is blocked and only unilateral production can be carried out. The connecting pipe 43 is located at the end of the flow channel 41, and a pipeline 44 is arranged on one side of the connecting pipe 43. The connecting pipe 43 is connected to the cavity 12 through the pipeline 44. The connecting pipe 43 is perpendicular to the bottom surface of the lower mold 3 and extends outward. The pipeline 44 is L-shaped to connect the connecting pipe 43 with the cavity 12.

Working principle: When in use, the heated and melted plastic first flows into the main cavity 411 through the through hole 11 of the upper mold 2 and the injection cylinder 5, and flows to the cavities 12 on both sides through the branch channel 412. By adjusting the blocking piece 42 inserted in the middle of the branch channel 412, free switching between single-sided production and double-sided production can be achieved; the insert 422 is moved in the slide 421 with the fixed rod 423 as the fixed point. When the end of the insert 422 away from the fixed rod 423 is close to the inner wall of the slide 421, the branch channel 412 is normal and double-sided production can be carried out. When the end of the insert 422 close to the fixed rod 423 is close to the inner wall of the slide 421, the branch channel 412 is blocked and only single-sided production can be carried out.

Claims (7)

1. An adjustable hot runner injection mold, includes mould body (1), its characterized in that: the die body (1) comprises an upper die (2) with a plurality of through holes (11) formed in the top, and a lower die (3) with two cavities (12) formed in the bottom, wherein an injection molding unit (4) is arranged between the cavities (12), the injection molding unit (4) comprises a plurality of flow channels (41), blocking pieces (42) arranged on the flow channels (41) and communicating pipes (43) arranged at the ends of the flow channels (41), one side of each communicating pipe (43) is provided with a pipeline (44), one end of each pipeline (44) is connected with each communicating pipe (43), and the other end of each pipeline is connected into the cavity (12).

2. An adjustable hot runner injection mold according to claim 1, wherein: the runner (41) comprises a main flow cavity (411) and two symmetrically arranged sub-runners (412), and the sub-runners (412) are positioned at two sides of the main flow cavity (411) and extend along the width direction of the lower die (3).

3. An adjustable hot runner injection mold according to claim 2, wherein: the blocking piece (42) is inserted on the shunt channel (412), and comprises a slide way (421) arranged at the bottom of the lower die (3), an insert (422) arranged in the slide way (421), and a fixing rod (423) arranged in the slide way (421), wherein a waist-shaped hole (424) matched with the fixing rod (423) is formed in the insert (422).

4. An adjustable hot runner injection mold according to claim 2, wherein: an injection molding cylinder (5) is connected between the main flow cavity (411) and the through hole (11).

5. An adjustable hot runner injection mold according to claim 1, wherein: the through holes (11) are formed along the length direction of the upper die (2), and the two cavities (12) are formed along the length direction of the lower die (3).

6. An adjustable hot runner injection mold according to claim 1, wherein: the communicating pipe (43) is arranged to extend outwards perpendicular to the bottom surface of the lower die (3), and the pipeline (44) is of an L-shaped structure to connect the communicating pipe (43) with the cavity (12).

7. The adjustable hot runner injection mold of claim 6, wherein: the bottom surface of the lower die (3) is arranged in an inward concave arc structure.