Mold structure for solving highlight transparent weld marks of multi-point gate

Abstract

The utility model provides a mold structure for solving a highlight transparent weld mark of a multi-point gate, which comprises a panel, a runner plate, an ejector plate, an upper fixed mold, a lower movable mold and a bottom plate, a fixed mold core is embedded in the bottom of the upper fixed mold, a movable mold core is embedded in the lower movable mold, the fixed mold core and the movable mold core form a molding cavity, and the hot runner plate is provided with two hot runners. The hot runner downwards penetrates through the ejector plate, the upper fixed mold and the fixed mold core in a sliding manner to reach the cavity, a double-bushing mechanism is arranged at the lower end of the hot runner, the double-bushing mechanism comprises a first bushing and a second bushing, the first bushing, the second bushing and the hot runner are in local contact, the lower end of the first bushing inclines towards an inner ring and abuts against the lower side of the hot runner, and a water path is arranged on an outer ring of the second bushing. The double-layer lining is adopted, the first-layer lining, the hot runner and the second lining are all in local contact to reduce heat conduction, the water path is arranged on the outer ring of the second lining and used for balancing the temperature difference between the hot runner and the mold, and the surface defects such as weld marks caused by uneven temperature are reduced.

Description

Technical Field

[0001] The utility model relates to the field of molds, and in particular to a mold structure for solving the problem of multi-point gate high-gloss and transparent weld marks. Background Art

[0002] Molds are tools used to make molded products. Products of different shapes can be made by different shapes of molds. Usually, high-gloss and transparent products are made by injection molding of PCTG materials, such as Figure 1 The ice bucket lid shown is made of PCTG material injection molding. During injection molding, multi-point gate injection is required. The multi-point injection method causes uneven intersection and fusion of the glue in the cavity, resulting in visible defects on the surface of the product, such as weld seams. Therefore, how to solve the generation of weld seams caused by multi-point gate PCTG material injection molding is a technical problem that needs to be solved urgently. Utility Model Content

[0003] The utility model provides a mold structure for solving the problem of high-gloss and transparent weld marks caused by multi-point gates, aiming to solve the technical problem of how to solve the generation of weld seams caused by injection molding of PCTG materials with multi-point gates.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a solution to the multi-point gate high-gloss transparent weld mark mold structure, including a panel, a runner plate, an ejector plate, an upper fixed mold, a lower movable mold, and a bottom plate from top to bottom, the bottom of the upper fixed mold is embedded with a fixed mold core, the lower movable mold is embedded with a movable mold core, the fixed mold core and the movable mold core are closed to form a molding cavity, the hot runner plate is provided with two hot runners, the hot runner can slide downward through the ejector plate, the upper fixed mold, the fixed mold core to the cavity, a double bushing mechanism is provided at the lower end of the hot runner, the double bushing mechanism includes a first bushing and a second bushing, the lower end of the first bushing is inclined toward the inner ring and abuts against the lower side of the hot runner, a convex ring is provided on the upper outer side of the first bushing, the inner ring of the second bushing abuts against the convex ring, and a water channel is provided on the outer ring of the second bushing.

[0005] Furthermore, a timing control valve is provided on the side of the panel.

[0006] Furthermore, cooling water channels are provided inside the movable mold core and the fixed mold core.

[0007] Furthermore, the fixed mold core is slidably provided with a plurality of ejector blocks, the upper ends of the ejector blocks are connected to ejector rods, and the other ends of the ejector rods are connected to the ejector pin plate.

[0008] Furthermore, a side slide block is provided between the fixed mold core and the movable mold core, and an inclined guide rod is provided on the lower movable mold, and the inclined guide rod drives the side slide block to approach or leave the cavity.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model solves the problem of multi-point gate high-gloss transparent weld mark mold structure, including a panel, a runner plate, an ejector plate, an upper fixed mold, a lower movable mold, and a bottom plate. The bottom of the upper fixed mold is embedded with a fixed mold core, and the lower movable mold is embedded with a movable mold core. The fixed mold core and the movable mold core are closed to form a molding cavity. The hot runner plate is provided with two hot runners, which can slide downward through the ejector plate, the upper fixed mold, and the fixed mold core to the cavity. The lower end of the hot runner is provided with a double bushing mechanism, which includes a first bushing and a second bushing. The lower end of the first bushing is inclined toward the inner ring and abuts against the lower side of the hot runner. A convex ring is provided on the upper outer side of the first bushing. The inner ring of the second bushing abuts against the convex ring. The outer ring of the second bushing is provided with a water channel. The utility model adopts a double-layer bushing. The first bushing and the hot runner and the second bushing all adopt local contact to reduce heat conduction. The outer ring of the second bushing is provided with a water channel to balance the temperature difference between the hot runner and the mold, thereby reducing surface defects caused by uneven temperature, such as weld marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the structure of an ice bucket lid.

[0013] Figure 2 This is a schematic diagram of the utility model for solving the problem of multi-point gate high-gloss transparent weld mark mold structure;

[0014] Figure 3 This is a schematic diagram of the hot runner decomposition structure of the utility model to solve the problem of multi-point gate high-gloss transparent weld mark mold structure;

[0015] Figure 4 This is a cross-sectional view of the hot runner of the utility model for solving the problem of multi-point gate high-gloss transparent weld mark mold structure;

[0016] Figure 5 This is a schematic diagram of the fixed mold core and side slider structure of the utility model for solving the problem of multi-point gate high-gloss transparent weld mark mold structure;

[0017] Figure 6 This is a schematic diagram of the movable mold core structure of the utility model for solving the problem of multi-point gate high-gloss transparent weld mark mold structure;

[0018] Figure 7The utility model is a schematic diagram of the ejector rod and ejector block structure for solving the problem of multi-point gate high-gloss transparent weld mark mold structure.

[0019] Description of main component symbols

[0020] 10. Panel; 101. Timing control valve;

[0021] 20, runner plate; 201, hot runner; 2011, first bushing; 2012, second bushing;

[0022] 30, ejector plate; 301, ejector pin; 3011, ejector block;

[0023] 40, upper fixed mold; 401, fixed mold core; 402, side slide;

[0024] 50, lower movable mold; 501, movable mold core;

[0025] 60. Bottom plate;

[0026] 70. Ice bucket lid. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] Example

[0031] Reference Figure 2 、 Figure 5-7 As shown, the utility model discloses a mold structure for solving the problem of high-gloss and transparent weld marks at multiple gates, comprising a panel 10, a runner plate 20, an ejector plate 30, an upper fixed mold 40, a lower movable mold 50, and a bottom plate 60 from top to bottom. A fixed mold core 401 is embedded in the bottom of the upper fixed mold 40, and a movable mold core 501 is embedded in the lower movable mold 50. The fixed mold core 401 and the movable mold core 501 are closed to form a molding cavity, and the hot runner 201 plate 20 is provided with two hot runners 201. Specifically, a side slider 402 is provided between the fixed mold core 401 and the movable mold core 501, and an inclined guide rod is provided on the lower movable mold 50. The inclined guide rod drives the side slider 402 to approach or leave the cavity. When the mold is closed, the movable mold core and the fixed mold core 401 are closed, and the side sliders 402 on both sides are close to the cavity. The rubber enters the cavity from the hot runner 201 to form a molded product. When the mold is opened, the fixed mold core 401 and the movable mold core 501 separate, and the lower movable mold 50 drives the side sliders 402 on both sides to release from the undercuts on both sides of the product. Furthermore, the fixed mold core 401 is slidably provided with several ejector blocks 3011. The upper end of the ejector block 3011 is connected to the ejector rod 301, and the other end of the ejector rod 301 is connected to the ejector plate 30. Two cylinders are installed on the side of the ejector plate 30. The cylinders drive the movement of the ejector plate 30. After the movable mold core 501 and the fixed mold core 401 separate, the ejector plate 30 is controlled to push the ejector blocks 3011 to push the product off the fixed mold core 401. This can prevent the ejector from pushing the product and causing marks and unevenness on the surface, and achieve product molding and demolding.

[0032] Reference Figure 3-4As shown, the hot runner 201 can slide downward through the ejector plate 30, the upper fixed mold 40, and the fixed mold core 401 to the cavity. A double bushing mechanism is provided at the lower end of the hot runner 201. The double bushing mechanism includes a first bushing 2011 and a second bushing 2012. The lower end of the first bushing 2011 is inclined toward the inner circle and abuts against the lower side of the hot runner 201, reducing the contact between the first bushing 2011 and the hot runner 201. A convex ring is provided on the upper outer side surface of the first bushing 2011, and the inner circle of the second bushing 2012 abuts against the convex ring, reducing the contact between the first bushing 2011 and the second bushing 2012. A water channel is provided on the outer circle of the second bushing 2012. A double-layer bushing is used. The first bushing and the hot runner 201 and the second bushing 2012 all adopt local contact to reduce heat conduction, ensuring that the hot runner 201 is maintained at a high temperature of 250℃-260℃ and the rubber has good fluidity. A water channel is set on the outer ring of the second bushing 2012. Because the temperature at the gate of the hot runner 201 is very high, the water channel is used to balance the temperature difference between the hot runner 201 and the mold, thereby reducing surface defects caused by uneven temperature, such as weld marks and other problems.

[0033] Reference Figure 2 As shown, a timing control valve 101 is provided on the side of the panel 10. The timing control valve 101 accurately controls the order of the glue feeding, so that the fusion of the glue at the intersection can be carried out in a relatively hidden area, reducing the possibility of visual defects.

[0034] Furthermore, cooling water channels are provided inside the movable mold core 501 and the fixed mold core 401. The evenly arranged water channels allow the product to cool evenly, thereby maintaining the overall thermal balance of the mold. The uniformity of the mold temperature is conducive to the flow of the rubber.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A mold structure for solving the problem of multi-point gate high gloss transparent weld mark, characterized by: It includes a panel, a runner plate, an ejector plate, an upper fixed mold, a lower movable mold, and a bottom plate from top to bottom. The fixed mold core is embedded in the bottom of the upper fixed mold, and the movable mold core is embedded in the lower movable mold. The fixed mold core and the movable mold core are closed to form a molding cavity. The runner plate is provided with two hot runners, and the hot runners can slide downward through the ejector plate, the upper fixed mold, the fixed mold core to the cavity. A double bushing mechanism is provided at the lower end of the hot runner, and the double bushing mechanism includes a first bushing and a second bushing. The lower end of the first bushing is inclined toward the inner ring and abuts against the lower side of the hot runner. A convex ring is provided on the upper outer side of the first bushing, and the inner ring of the second bushing abuts against the convex ring. A water channel is provided on the outer ring of the second bushing.

2. The mold structure for solving the problem of multi-point gate high-gloss and transparent weld marks according to claim 1, characterized in that: A timing control valve is arranged on the side of the panel.

3. The mold structure for solving the problem of multi-point gate high-gloss and transparent weld marks according to claim 1 is characterized in that: Cooling water channels are provided inside the movable mold core and the fixed mold core.

4. The mold structure for solving the problem of multi-point gate high-gloss and transparent weld marks according to claim 1 is characterized in that: The fixed mold core is slidably provided with a plurality of ejector blocks, the upper ends of the ejector blocks are connected to ejector rods, and the other ends of the ejector rods are connected to the ejector pin plates.

5. The mold structure for solving the problem of multi-point gate high-gloss and transparent weld marks according to claim 1 is characterized in that: A side slide block is provided between the fixed mold core and the movable mold core, and an inclined guide rod is provided on the lower movable mold. The inclined guide rod drives the side slide block to approach or leave the cavity.

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