Injection mold capable of preventing molten material from being cooled in injection molding opening

Abstract

The injection mold comprises a top seat and an injection molding cavity, a group of positioning holes used for positioning the top seat are formed in four groups of external corners of the top seat, and a plurality of groups of upper fixing bolts used for being fixedly connected with the upper end of a heat preservation housing are arranged in the front side, the rear side, the left side and the right side of the top seat. Compared with the prior art, the injection molding machine has the following beneficial effects that the interior of the injection molding cavity is kept sealed by using the inner sealing caulking groove and the sealing rubber edge, and the heat preservation housing is quickly connected with the caulking seat by using the positioning column; the injection molding material is prevented from leaking out of the interior of the injection molding cavity through the sealing rubber edge, the heat preservation effect of the injection molding material in the injection molding cavity is improved through the heat preservation layer, and the formed mold is rapidly ejected out through the mold ejection strip.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to an injection mold capable of preventing molten material from being cooled in an injection port. Background Art

[0002] Injection molds are one of the key equipment for plastic injection molding, used to produce plastic products of various shapes and sizes. This type of mold can form plastic products with complex shapes, precise dimensions or inserts in one go. When the injection mold is introducing the injection material, a series of problems may occur after the temperature of the injection material drops inside the injection port. These problems not only affect the quality and production efficiency of the product, but may also lead to an increase in production costs and a waste of resources. The following is a detailed explanation of this issue:

[0003] When the temperature of the injection molding material drops inside the injection port, its fluidity will deteriorate. Fluidity is a very important parameter in the injection molding process, which determines whether the plastic can smoothly fill every corner of the mold. The decrease in temperature leads to poor fluidity, which may cause defects such as insufficient filling and voids in the product.

[0004] The lower the temperature, the higher the viscosity of the injection material. The higher the viscosity, the greater the flow resistance of the plastic in the mold, which not only affects the molding quality of the product, but also may extend the injection cycle and reduce production efficiency. Therefore, there is an urgent need for an injection mold that prevents the molten material from cooling in the injection port to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide an injection mold that prevents molten material from cooling in the injection port, thereby solving the problems raised in the above-mentioned background technology.

[0006] The utility model is realized by the following technical scheme: an injection mold for preventing molten material from cooling in an injection port, comprising: a top seat and an injection cavity, wherein a group of positioning holes for positioning the top seat are provided inside four groups of positive corners of the top seat;

[0007] The top seat is provided with a plurality of upper fixing bolts for connecting and fixing with the upper end of the heat preservation cover shell on the inside of the front, back, left and right sides of the top seat, a heat preservation cover shell for heat preservation of the injection molding material is provided at the lower end of the top seat, and a group of heat preservation injection molding heads for heat preservation of the injection molding material is provided at the upper end of the top seat;

[0008] The insulation injection molding head is provided with an electric heating coil for heating the interior thereof, the insulation cover shell is provided with an injection cavity for molding the injection molding material on the inner side, the lower end of the injection molding cavity is provided with an inner sealing groove for sealing connection with the embedded shell on the inner side, and the injection molding cavity can be kept sealed by using the inner sealing groove and the sealing rubber edge.

[0009] As a preferred embodiment, a group of embedded shells for improving the supporting effect are provided at the lower end of the thermal insulation cover shell, and a group of positioning columns for connecting and positioning the thermal insulation cover shell and the embedded seat are provided at the upper ends of the four groups of positive angles of the embedded shell. The positioning columns can be used to quickly connect the thermal insulation cover shell and the embedded seat, and the connection position can be kept accurate.

[0010] As a preferred embodiment, a group of inner molds for interlocking with the inside of the injection cavity and molding the injection material are provided at the upper end of the middle position of the insert seat, and a sealing edge for sealingly interlocking with the inside of the inner sealing groove is provided at the lower end of the inner mold. The sealing edge can prevent the injection material from leaking out of the injection cavity.

[0011] As a preferred embodiment, the lower end of the embedded seat is provided with a side support for supporting it, the lower ends of the two groups of side supports are provided with a base for supporting it, the upper end of the middle position of the base is provided with several groups of top mold columns for demolding the mold, and the inner cushion seat is provided with several groups of lower fixing bolts connected and fixed to the base.

[0012] As a preferred embodiment, the top seat and the insulation cover shell are connected and fixed by several groups of bolts, an insulation layer is provided inside the insulation cover shell, and a group of positioning grooves are provided inside the four groups of positive corners of the insulation cover shell. The insulation layer can be used to improve the insulation effect of the injection material inside the injection cavity.

[0013] As a preferred embodiment, the inside of the positioning groove is respectively interlocked with a group of positioning columns, and the four groups of positioning columns are all connected and fixed to the insert seat. When the positioning columns and the positioning groove are interlocked, the injection cavity and the inner mold are sealed and interlocked with each other.

[0014] As a preferred embodiment, the top mold columns are provided in several groups, and the several groups of top mold columns all penetrate the interior of the inner mold and are connected and fixed to the bottom of the top mold bar. The top mold bar is embedded in the inner mold, and the cross-section of the top mold bar is a planar strip structure, which can quickly eject the mold after forming by using the top mold bar.

[0015] After adopting the above technical scheme, the beneficial effects of the utility model are: by using the inner sealing groove and the sealing edge to keep the inside of the injection cavity sealed, by using the positioning column to quickly connect the insulation cover and the insert and keep the connection position accurate, by using the sealing edge to prevent the injection material from leaking out of the injection cavity, by using the insulation layer to improve the insulation effect of the injection material inside the injection cavity, and by using the top mold strip to quickly eject the mold after forming. 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 these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of an injection mold for preventing molten material from cooling in an injection port according to the utility model, viewed from the right front oblique side;

[0018] Figure 2 It is a schematic diagram of the top view of the right oblique front side of the inner mold in an injection mold for preventing molten material from cooling in an injection port according to the utility model;

[0019] Figure 3 It is a schematic diagram of the top right oblique front side structure of an inner cushion seat and a plurality of groups of top mold columns in an injection mold for preventing molten material from cooling in an injection port according to the utility model;

[0020] Figure 4 It is a schematic diagram of the structure inside the injection cavity of an injection mold for preventing molten material from being cooled in the injection port according to the utility model when viewed from above;

[0021] In the figure: 100-top seat, 110-positioning hole, 120-upper fixing bolt, 130-insulation injection head, 140-insulation cover, 150-embedded seat, 160-side support seat, 170-inner cushion seat, 180-base, 190-positioning column, 200-inner mold, 210-lower fixing bolt, 220-top mold column, 230-inner sealing groove, 240-injection cavity. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-Figure 4 , an injection mold for preventing molten material from cooling in an injection port, comprising: a top seat 100 and an injection cavity 240, wherein a group of positioning holes 110 for positioning the top seat 100 are provided inside four groups of positive corners of the top seat 100;

[0024] A plurality of upper fixing bolts 120 for connecting and fixing with the upper end of the heat preservation cover 140 are arranged inside the front, back, left and right sides of the top seat 100. The heat preservation cover 140 for heat preservation of the injection molding material is arranged at the lower end of the top seat 100. A group of heat preservation injection molding heads 130 for heat preservation of the injection molding material is arranged at the upper end of the top seat 100.

[0025] An electric heating coil is provided inside the thermal insulation injection molding head 130 for heating the interior thereof, an injection molding cavity 240 for molding the injection molding material is provided inside the thermal insulation cover shell 140, and an inner sealing groove 230 for sealingly connecting with the embedded shell is provided on the inner side of the lower end of the injection molding cavity 240. The inner sealing groove 230 can be used to keep the interior of the injection molding cavity 240 sealed together with the sealing rubber edge.

[0026] A group of embedded shells for improving the supporting effect are provided at the lower end of the insulation cover shell 140, and a group of positioning columns 190 for connecting and positioning the insulation cover shell 140 and the embedded seat 150 are provided at the upper ends of the four groups of positive corners of the embedded shells. The positioning columns 190 can be used to quickly connect the insulation cover shell 140 and the embedded seat 150, and the connection position can be kept accurate.

[0027] A group of inner molds 200 are provided at the upper end of the middle position of the insert 150 for interlocking with the inside of the injection cavity 240 and forming the injection material. A sealing edge is provided at the lower end of the inner mold 200 for sealingly interlocking with the inside of the inner sealing groove 230. The use of the sealing edge can prevent the injection material from leaking out of the injection cavity 240.

[0028] The lower end of the insert 150 is provided with a side support 160 for supporting it, and the lower ends of the two groups of side supports 160 are provided with a base 180 for supporting it. The upper end of the middle position of the base 180 is provided with several groups of top mold columns 220 for demolding the mold, and the inner pad 170 is provided with several groups of lower fixing bolts 210 connected and fixed to the base 180.

[0029] The top seat 100 is fixed to the insulation shell 140 by several groups of bolts. An insulation layer is arranged inside the insulation shell 140. A group of positioning grooves are arranged inside the four groups of positive corners of the insulation shell 140. The insulation layer can be used to improve the insulation effect of the injection material inside the injection cavity 240.

[0030] The inside of the positioning groove is respectively engaged with a group of positioning columns 190, and the four groups of positioning columns 190 are all connected and fixed to the inserting seat 150. When the positioning columns 190 are engaged with the positioning groove, the injection cavity 240 and the inner mold 200 are sealed and engaged with each other.

[0031] There are several groups of top mold columns 220, and several groups of top mold columns 220 all penetrate the interior of the inner mold 200 and are connected and fixed to the bottom of the top mold bar. The top mold bar is embedded in the inner mold 200, and the cross-section of the top mold bar is a flat strip structure, which can quickly eject the mold after forming by using the top mold bar.

[0032] See also Figure 1-Figure 4 , as the first embodiment of the utility model: in order to solve the problem that the fluidity of the plastic material will deteriorate after the temperature inside the injection port is reduced, the fluidity is a very important parameter in the injection molding process, which determines whether the plastic can smoothly fill every corner of the mold. The temperature reduction leads to poor fluidity, which may cause the product to have defects such as insufficient filling and voids. First, the staff will position and connect the insulation cover 140 and the insert 150 through the positioning column 190, and then introduce the external injection molding material into the injection cavity 240 through the insulation injection molding head 130. Since the insulation injection molding head 130 is provided with an electric heating coil for heating the inside, the staff can keep the introduced injection molding material flowing at a high temperature by heating the electric heating coil, thereby reducing the congestion of the injection molding material caused by the solidification of the injection molding material due to the temperature reduction.

[0033] See also Figure 1-Figure 4 , as the second embodiment of the present utility model: based on the description in the above embodiments, further, after the injection molding material enters the injection molding cavity 240, because when the positioning column 190 and the positioning groove are interlocked with each other, the injection molding cavity 240 and the inner mold 200 are sealed and interlocked with each other, which can effectively prevent the injection molding material from leaking out. Then the injection molding material flows along the inside of the injection molding cavity 240 to cover and slowly form. After the injection molding material is formed, the staff removes the insulation cover 140, and then extends several groups of top mold columns 220 upward, and ejects the molded injection molding material. At the same time, because its top mold strip is embedded in the inner mold 200, and the cross-section of the top mold strip is a planar strip structure, when several groups of top mold columns 220 are pushed up at the same time, its top mold strip can expand the area of ​​the top mold, thereby preventing the mold from being damaged due to uneven force on multiple top mold fulcrums.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold for preventing molten material from cooling in an injection port, comprising: A top seat (100), a heat-insulating injection head (130), a top mold column (220), an inner sealing groove (230) and an injection cavity (240), characterized in that: a group of positioning holes (110) for positioning the top seat (100) are provided inside the four groups of positive corners of the top seat (100); The top seat (100) is provided with a plurality of groups of upper fixing bolts (120) for connecting and fixing with the upper end of the heat-insulating cover shell (140) on the inside of the front, back, left and right sides of the top seat (100); the heat-insulating cover shell (140) for keeping the injection molding material warm is provided at the lower end of the top seat (100); and a group of heat-insulating injection molding heads (130) for keeping the injection molding material warm is provided at the upper end of the top seat (100); The heat-insulating injection molding head (130) is provided with an electric heating coil for heating the interior thereof, the heat-insulating cover shell (140) is provided with an injection molding cavity (240) for molding the injection molding material on the inside, and the lower end of the injection molding cavity (240) is provided with an inner sealing groove (230) for sealingly connecting with the embedded shell.

2. The injection mold for preventing molten material from cooling in the injection port according to claim 1, characterized in that: The lower end of the heat-insulating shell (140) is provided with a group of embedded shells for improving the supporting effect, and the upper ends of the four groups of positive corners of the embedded shells are each provided with a group of positioning columns (190) for connecting and positioning the heat-insulating shell (140) and the embedded seat (150).

3. The injection mold for preventing molten material from being cooled in the injection port according to claim 2, characterized in that: A group of inner molds (200) for interlocking with the inside of the injection cavity (240) and molding the injection material are provided at the upper middle end of the insert seat (150), and a sealing rubber edge for sealingly interlocking with the inside of the inner sealing insert groove (230) is provided at the lower end of the inner mold (200).

4. The injection mold for preventing molten material from cooling in the injection port according to claim 3, characterized in that: The lower end of the insert seat (150) is provided with a side support seat (160) for supporting it, and the lower ends of the two groups of side supports (160) are provided with a base (180) for supporting them. The upper end of the middle position of the base (180) is provided with a plurality of groups of top mold columns (220) for demoulding the mold, and the inner pad seat (170) is provided with a plurality of groups of lower fixing bolts (210) connected and fixed to the base (180).

5. The injection mold for preventing molten material from being cooled in the injection port according to claim 1, characterized in that: The top seat (100) and the heat-insulating cover shell (140) are connected and fixed by a plurality of groups of bolts. A heat-insulating layer is provided inside the heat-insulating cover shell (140). A group of positioning grooves are provided inside the four groups of positive corners of the heat-insulating cover shell (140).

6. The injection mold for preventing molten material from cooling in the injection port according to claim 5, characterized in that: The interior of the positioning groove is respectively connected to a group of positioning columns (190) which are mutually engaged. The four groups of positioning columns (190) are all connected and fixed to the insert seat (150). When the positioning columns (190) are mutually engaged with the positioning groove, the injection cavity (240) and the inner mold (200) are mutually sealed and engaged.

7. The injection mold for preventing molten material from cooling in the injection port according to claim 4, characterized in that: The top mold columns (220) are provided in a plurality of groups, and the plurality of groups of the top mold columns (220) all penetrate the interior of the inner mold (200) and are connected and fixed to the bottom of the top mold strip. The top mold strip is embedded in the interior of the inner mold (200), and the cross section of the top mold strip is a planar strip structure.

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