Replaceable runner insert

Abstract

The utility model relates to the technical field of mold runners, in particular to a replaceable runner insert. Comprising a mold core and a runner insert detachably fixed on the mold core, the runner insert comprises a main runner arranged on the runner insert and a sub-runner communicated with the main runner and connected with a product cavity, and the runner width size of the sub-runner can be set to be various. The cross section of the sub-runner is triangular, the length of the edge, connected with the product cavity, of the triangular sub-runner is the width size, and the width size can be set to be various. And the width size is 30 mm or 28 mm. The runner insert is detachably fixed on the lower mold core through a bolt, the runner insert and the lower mold core are both of a central symmetry structure, and two central symmetry product cavities are formed at the same time; according to the utility model, the runner insert is detachable, and the runner width size of the sub-runner can be set to be various, so that the proper runner insert can be selected and replaced as required, and the practicability is strong.

Description

Technical Field

[0001] This utility model relates to the field of mold runner technology, and in particular to a replaceable runner insert. Background Technology

[0002] Mold runners are an important component in injection molding, serving as channels for the flow of molten plastic. Located within the mold, the mold runner is a three-dimensional, tortuous channel whose main function is to guide the molten plastic from the injection molding machine into the mold cavity to form the product. The design of the mold runner has a crucial impact on product molding. A well-designed mold runner can ensure a smooth product surface, avoid product defects, shorten the molding cycle, improve production efficiency, and reduce production costs.

[0003] In the prior art, the size of the runner affects the surface appearance of the HUD product. If the runner and the mold core are designed as one piece, the size of the runner cannot be adjusted. As a result, the surface appearance of the product after injection molding is not good, and the entire mold core is at risk of being scrapped. A replaceable runner insert is proposed to solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of this utility model is to provide a replaceable runner insert to solve the problem in the prior art where the runner and mold core are designed as a single unit, the size of the runner cannot be adjusted, the surface of the product after injection molding is not good, and the entire mold core may be scrapped.

[0005] The technical solution of this utility model is: a replaceable runner insert, including: a mold core, a runner insert that is detachably fixed on the mold core, the runner insert including a main runner formed on the runner insert and a branch runner connected to the main runner and connected to the product cavity, the runner width dimension of the branch runner can be set to various.

[0006] Preferably, the cross-section of the flow channel is triangular, and the length of the side of the triangular flow channel connected to the product cavity is the width dimension, which can be set to various values.

[0007] Preferably, the width is 30 mm or 28 mm.

[0008] Preferably, the runner insert is detachably fixed to the lower mold core by bolts, and both the runner insert and the lower mold core have a centrally symmetrical structure, thus forming two centrally symmetrical product cavities.

[0009] The main channel itself has a centrally symmetrical structure, and there are two branch channels, which are centrally symmetrically arranged at the two ends of the main channel.

[0010] Preferably, the flow channel insert has multiple water channels inside for the flow of cooling water.

[0011] Preferably, the flow channel insert has a plurality of ejector pin holes that are vertically through it for ejector pins to pass through, and the plurality of ejector pin holes are respectively connected to the main flow channel and the branch flow channel.

[0012] Preferably, the flow channel insert is provided with a flow-stopping bolt that can be screwed in and out, and the bolt hole for installing the flow-stopping bolt is connected to the main flow channel.

[0013] Preferably, the bottom surface of the runner insert has a downward-protruding positioning boss for positioning the runner insert on the lower mold core.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] (1) A replaceable runner insert according to this utility model includes: a mold core, a runner insert detachably fixed on the mold core, the runner insert including a main runner formed on the runner insert and a branch runner connected to the main runner and the product cavity, the runner width dimension of the branch runner can be set to various. In actual production, since the runner insert is detachable and the runner width dimension of the branch runner can be set to various, the appropriate runner insert can be selected and replaced as needed, avoiding the problem in the prior art where the runner is integrated on the mold core, and if the width of the branch runner in the runner insert is not suitable, especially if the width of the branch runner is too large, the mold core will be scrapped.

[0016] (2) A replaceable flow channel insert in this utility model is provided with a flow-stopping bolt that can be screwed in and screwed out. The bolt hole for installing the flow-stopping bolt is connected to the main flow channel. The flow-stopping bolt is installed in the second bolt hole. Specifically, when the flow-stopping bolt is screwed into the bolt hole, the amount of glue entering the flow channel is increased. When the flow-stopping bolt is screwed out of the bolt hole, the amount of glue entering the flow channel is decreased. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of a replaceable runner insert assembled on the lower mold core according to this embodiment;

[0019] Figure 2 for Figure 1 A schematic diagram of the exploded structure;

[0020] Figure 3 This is a top-view structural diagram of a replaceable flow channel insert as described in this embodiment;

[0021] Figure 4 This is a structural schematic diagram of a replaceable flow channel insert from an upward angle, as described in this embodiment.

[0022] Among them: 1. Runner insert, 2. Main runner, 3. Sub-runner, 4. Water channel, 5. Ejector pin hole, 6. Cut-off bolt, 7. Positioning boss, 8. First bolt hole, 9. Second bolt hole, 10. Lower mold core, 11. First bolt, 12. Ejector pin. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments:

[0024] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0025] Example 1

[0026] like Figure 1 , Figure 2 As shown, a replaceable runner insert 1 includes: a mold core, and a runner insert 1 detachably fixed to the mold core. The runner insert 1 includes a main runner 2 formed on the runner insert 1, and a branch runner 3 connected to the main runner 2 and the product cavity. The width dimension of the branch runner 3 can be set to various values. The cross-section of the branch runner 3 is triangular, and the length of the side of the triangular branch runner 3 connected to the product cavity is the width dimension. This width dimension can be set to various values, and the specific value and number of width dimensions designed are set according to the actual needs of the mold. Figure 3 In the embodiment shown, the width dimension H is 30 mm.

[0027] The runner insert 1 is detachably fixed to the lower mold core 10 by a first bolt 11, which is installed in the first bolt hole 8. Both the runner insert 1 and the lower mold core 10 have a centrally symmetrical structure, forming two centrally symmetrical product cavities. Figure 3 , Figure 4As shown, the main flow channel 2 has a centrally symmetrical structure, and there are two branch flow channels 3, which are centrally symmetrically arranged at both ends of the main flow channel 2. The flow channel insert 1 has multiple water channels 4 for cooling water flow. Multiple ejector pin holes 5 are vertically arranged through the flow channel insert 1 for ejector pins 12 to pass through. These ejector pin holes 5 are connected to the main flow channel 2 and the branch flow channels 3, respectively. The ejector pins 12 are used to eject the product after injection molding. The flow channel insert 1 has a flow-stopping bolt 6 that can be screwed in and out. The bolt hole for installing the flow-stopping bolt 6 is connected to the main flow channel 2, and the flow-stopping bolt 6 is installed in the second bolt hole 9. Specifically, screwing the flow-stopping bolt 6 into the second bolt hole 9 increases the amount of material entering the flow channel, and screwing the flow-stopping bolt 6 out of the second bolt hole 9 decreases the amount of material entering the flow channel. The bottom surface of the runner insert 1 is provided with a positioning boss 7 for positioning the runner insert 1 on the lower mold core 10, which facilitates the installation of the runner insert 1 on the lower mold core 10.

[0028] In actual production, since the runner insert 1 is detachable and the runner width of the sub-runner 3 can be set to multiple dimensions, the appropriate runner insert 1 can be selected and replaced as needed. This avoids the problem in the prior art where the runner is integrated on the mold core, and if the width of the sub-runner 3 in the runner insert 1 is not suitable, especially if the width of the sub-runner 3 is too large, the mold core will be scrapped.

[0029] Example 2

[0030] The difference between Example 2 and Example 1 is that the length of the side of the triangular branch channel 3 that is connected to the product cavity is the width dimension, and the width dimension H is 28 mm.

[0031] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A replaceable flow channel insert, characterized in that, include: The mold core and a runner insert detachably fixed to the mold core, the runner insert including a main runner formed on the runner insert and a branch runner connected to the main runner and the product cavity, the runner width dimension of the branch runner can be set to various.

2. The replaceable flow channel insert according to claim 1, characterized in that: The cross-section of the flow channel is triangular, and the length of the side of the flow channel that connects to the product cavity is the width dimension, which can be set to various values.

3. A replaceable flow channel insert according to claim 2, characterized in that: The width dimension is 30 mm or 28 mm.

4. A replaceable flow channel insert according to claim 3, characterized in that: The runner insert is detachably fixed to the lower mold core by bolts. Both the runner insert and the lower mold core have a centrally symmetrical structure, forming two centrally symmetrical product cavities. The main channel itself has a centrally symmetrical structure, and there are two branch channels, which are centrally symmetrically arranged at the two ends of the main channel.

5. A replaceable flow channel insert according to claim 4, characterized in that: The flow channel insert has multiple water channels inside for the flow of cooling water.

6. A replaceable flow channel insert according to claim 4, characterized in that: The flow channel insert has multiple ejector pin holes that are vertically connected to the main flow channel and the branch flow channel, respectively.

7. A replaceable flow channel insert according to claim 4, characterized in that: The flow channel insert is provided with a flow-stopping bolt that can be screwed in and out, and the bolt hole for installing the flow-stopping bolt is connected to the main flow channel.

8. A replaceable flow channel insert according to claim 4, characterized in that: The bottom surface of the flow channel insert has a downward protruding positioning boss for positioning the flow channel insert on the lower mold core.

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