In-mold heat pressure maintaining structure

Abstract

The utility model discloses an in-mold heat pressure maintaining structure which comprises a mold main body and is characterized in that the mold main body comprises a plate A and a plate B, and a mold cavity is formed between the plate A and the plate B; the pressure maintaining assembly comprises a first in-mold multi-lamination pressurizing oil cylinder and a groove formed in the plate B and used for containing plastic materials, a push rod matched with the groove in shape is arranged in the groove, and the push rod seals the groove; and the output end of the first in-mold multi-lamination pressurizing oil cylinder is connected with the push rod and is used for pushing the push rod from the inner bottom of the groove to the inner top of the groove. Compared with the prior art, the injection mold has the advantages that the groove can accommodate a certain plastic material, and after injection of plastic is completed, the push rod can eject the plastic material in the groove into the mold cavity, so that the position, far away from the feeding hole, in the mold cavity can be filled with enough plastic material, and a molded product is enabled to be more full in whole and smoother in appearance.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an in-mold heat-maintaining pressure structure. Background Art

[0002] When plastic parts are injection molded, there are molds with one feed port and molds with multiple feed ports. If there is one feed port, the advantage is that the cost of developing the mold is low, but the disadvantage is that when using one feed port, when large parts are injection molded, the distance between the feed end inside the mold and the opposite end is often far, resulting in relatively less plastic material far away from the feed end due to pressure problems, which in turn causes the molded product to have different overall thickness or traces of depressions, affecting the appearance.

[0003] Later, some people made improvements by setting multiple feed ports, but this would increase the cost of making the mold and it is still difficult to meet the market demand for high-precision products, so there is room for improvement. Utility Model Content

[0004] The main purpose of the utility model is to provide an in-mold heat-maintaining structure. By arranging grooves and push rods, the position in the mold cavity away from the feed port can be filled with enough plastic material to ensure that the molded product is fuller as a whole.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An in-mold heat-holding structure includes a mold body, characterized in that: the mold body includes:

[0007] A plate and a B plate, wherein a mold cavity is formed between the A plate and the B plate;

[0008] The pressure-maintaining component includes a first in-mold multi-layer booster cylinder and a groove opened on the B plate for accommodating plastic material, a push rod with a shape matching the groove is arranged in the groove, and the push rod seals the groove. The output end of the first in-mold multi-layer booster cylinder is connected to the push rod for pushing the push rod from the bottom of the groove to the top.

[0009] Furthermore, the push rod and the groove are both perpendicular to the mold cavity, and the push rod and the groove are located at the bottom of the mold cavity.

[0010] Furthermore, a bottom plate is fixedly connected to the bottom of the first in-mold multi-layer booster cylinder, and the bottom plate is fixedly connected to the B plate.

[0011] Furthermore, a feed port communicating with the mold cavity is arranged on the A plate.

[0012] Furthermore, the oil inlet and outlet ports of the multi-layer booster cylinder in the first mold are located outside the mold body.

[0013] Furthermore, the output end of the multi-layer booster cylinder in the first mold is connected to the push rod through a connecting buckle.

[0014] Furthermore, it also includes a second in-mold multi-layer booster cylinder, the output end of the second in-mold multi-layer booster cylinder is connected to a sprue cutter, and the sprue cutter is located at the sprue of the mold body.

[0015] Furthermore, the bottom of the multi-layer booster cylinder in the second mold is fixed on the bottom plate.

[0016] Furthermore, the mold body also includes a plurality of groups of square irons, and the square irons are arranged between the B plate and the bottom plate.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The groove of the utility model can accommodate a certain amount of plastic material. When the plastic is injected, the push rod can push the plastic material in the groove into the mold cavity, so that the position in the mold cavity away from the feed port can be filled with enough plastic material to ensure that the molded product is fuller and smoother in appearance.

[0019] 2. The nozzle cutter of the utility model is located at the nozzle of the mold body 1. When the multi-layer booster cylinder in the second mold drives the nozzle cutter to rise, the nozzle cutter can cut the nozzle.

[0020] 3. The second in-mold multi-layer booster cylinder and the first in-mold multi-layer booster cylinder of the utility model can generate greater thrust without changing their own width, so that they can be assembled on molds with limited internal space, so that the mold as a whole has a higher hydraulic cutting ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the overall structure of an in-mold heat-maintaining pressure structure.

[0022] Figure 2 It is a side structural schematic diagram of an in-mold heat holding pressure structure of the utility model.

[0023] Figure 3 This is a schematic diagram of the B plate structure of an in-mold heat-maintaining pressure structure of the utility model.

[0024] Figure 4 The utility model is a schematic diagram of the connection structure of the A plate, the B plate and the bottom plate of the in-mold heat holding structure.

[0025] Figure 5 The utility model is a schematic diagram of the oil inlet and outlet positions of an in-mold heat-maintaining structure.

[0026] In the figure: 1. mold body; 101. A plate; 102. B plate; 2. feed port; 3. multi-layered booster cylinder in the first mold; 4. bottom plate; 5. groove; 6. push rod; 7. multi-layered booster cylinder in the second mold; 8. sprue cutter; 9. mold cavity; 10. oil inlet and outlet; 11. connecting buckle; 12. square iron. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] Embodiment 1:

[0029] like Figure 1-5 As shown, an in-mold heat-holding structure includes a mold body 1, characterized in that: the mold body 1 includes: an A plate 101 and a B plate 102, a mold cavity 9 is formed between the A plate 101 and the B plate 102, and a feed port 2 connected to the mold cavity 9 is arranged on the A plate 101; the pressure holding component includes a first in-mold multi-layer boosting cylinder 3 and a groove 5 opened on the B plate 102 for accommodating plastic material, a push rod 6 with a shape matching the groove 5 is arranged in the groove 5, and the push rod 6 seals the groove 5, and the output end of the first in-mold multi-layer boosting cylinder 3 is connected to the push rod 6 for pushing the push rod 6 from the bottom of the groove 5 to the top.

[0030] In this embodiment, the plastic material enters the mold cavity 9 through the feed port 2. Since the initial position of the push rod 6 is located at the bottom of the groove 5, some of the plastic material will flow into the groove 5. Since the push rod 6 seals the groove 5, this part of the plastic material will not leak. Figure 1 As shown, after the plastic is injected, the multi-layer booster cylinder 3 in the first mold is controlled to work, which will drive the push rod 6 to rise upward, and the top height of the push rod 6 after rising is the same as the top height of the groove 5, thereby pushing the plastic material in the groove 5 into the mold cavity 9, and then the position in the mold cavity 9 away from the feed port can be filled with enough plastic material to ensure that the molded product is fuller as a whole and has a smoother appearance.

[0031] Among them, the bottom of the multi-layer booster cylinder 3 in the first mold is fixedly connected to the bottom of the bottom plate 4, and the bottom plate 4 is fixedly connected to the B plate 102, thereby improving the overall strength of the mold.

[0032] Among them, Figure 5 As shown, the oil inlet and outlet 10 of the multi-layer booster cylinder 3 in the first mold is located outside the mold body 1, so the oil inlet and outlet 10 can be connected to the hydraulic control system to control the working state of the multi-layer booster cylinder 3 in the first mold.

[0033] Among them, Figure 1As shown, the output end of the multi-layer booster cylinder 3 in the first mold is connected to the push rod 6 through a connecting buckle 11. The connecting buckle 11 is a prior art and will not be described in detail here. It can make the connection between the output end of the multi-layer booster cylinder 3 in the first mold and the push rod 6 more stable, and the connection operation is simple and quick.

[0034] Among them, Figure 1 and 3 As shown, the push rod 6 and the groove 5 are both perpendicular to the mold cavity 9 , and the push rod 6 and the groove 5 are located at the bottom of the mold cavity 9 . Therefore, when the push rod 6 moves upward, the force is uniform, and the plastic material is easily ejected from the groove 5 .

[0035] Among them, as attached Figure 4 As shown, the mold body 1 also includes a plurality of groups of square irons 12, and the square irons 12 are arranged between the B plate 102 and the bottom plate 4. The square irons 12 are arranged in two groups, and the two groups of square irons 12 are arranged opposite to each other. One end of the square iron 12 is fixed on the B plate 102, and the other end of the square iron 12 is fixed on the bottom plate 4. The square iron 12 has a certain height, so that there is a certain space between the B plate 102 and the bottom plate 4 to facilitate the up and down movement of the ejector plate. The ejector plate is a product of injection molding or cutting molding, and is a necessary device for exiting the mold. It is also a prior art and will not be described in detail here.

[0036] Embodiment 2:

[0037] On the basis of Example 1, Figure 1 As shown, there is also a second in-mold multi-layer boosting cylinder 7, the bottom of the second in-mold multi-layer boosting cylinder 7 is fixed on the bottom plate 4, the output end of the second in-mold multi-layer boosting cylinder 7 is connected to a sprue cutter 8, and the sprue cutter 8 is located at the sprue of the mold body 1. When the second in-mold multi-layer boosting cylinder 7 drives the sprue cutter 8 to rise, the sprue cutter 8 can cut the sprue.

[0038] The second in-mold multi-layer booster cylinder 7 and the first in-mold multi-layer booster cylinder 3 are in-mold multi-layer booster cylinders recorded in application number 2023115638777. This cylinder can generate greater thrust without changing its own width, so that it can be assembled on a mold with a smaller internal space, so that the mold as a whole has a higher hydraulic cutting ability, can be adapted to the molds of more products, and can cut plastic water outlets.

[0039] Working principle, first, the plastic material enters the mold cavity 9 through the feed port 2. Since the initial position of the push rod 6 is located at the bottom of the groove 5, some of the plastic material will flow into the groove 5. Since the push rod 6 seals the groove 5, this part of the plastic material will not leak. When the plastic is injected, the multi-layer booster cylinder 3 in the first mold is controlled to work, which will drive the push rod 6 to rise upward, thereby ejecting the plastic material in the groove 5 into the mold cavity 9, so that the position in the mold cavity 9 away from the feed port can be filled with enough plastic material, and the top height of the push rod 6 after rising is the same as the top height of the groove 5, so as to ensure that the molded product is fuller as a whole and the appearance is smoother. In addition, after the second multi-layer booster cylinder 7 in the mold drives the sprue cutter 8 to rise, the sprue cutter 8 can cut the sprue.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An in-mold heat-holding structure, comprising a mold body (1), characterized in that: The mold body (1) comprises: A plate (101) and a plate (102), wherein a mold cavity (9) is formed between the plate (101) and the plate (102); The pressure-maintaining component comprises a first in-mold multi-layer boosting cylinder (3) and a groove (5) opened on the B plate (102) for accommodating plastic material, wherein a push rod (6) having a shape matching that of the groove (5) is arranged in the groove (5), and the push rod (6) seals the groove (5), and the output end of the first in-mold multi-layer boosting cylinder (3) is connected to the push rod (6) for pushing the push rod (6) from the bottom of the groove (5) to the top.

2. The in-mold heat-maintaining structure according to claim 1, characterized in that: The push rod (6) and the groove (5) are both perpendicular to the mold cavity (9), and the push rod (6) and the groove (5) are located at the bottom of the mold cavity (9).

3. The in-mold heat-maintaining structure according to claim 2, characterized in that: A bottom plate (4) is fixedly connected to the bottom of the first in-mold multi-layer booster cylinder (3), and the bottom plate (4) is fixedly connected to the B plate (102).

4. The in-mold heat-maintaining structure according to claim 1, characterized in that: The A plate (101) is provided with a feed port (2) which is in communication with the mold cavity (9).

5. The in-mold heat-maintaining structure according to claim 1, characterized in that: The oil inlet and outlet ports (10) of the multi-layered booster oil cylinder (3) in the first mold are located outside the mold body (1).

6. The in-mold heat-holding structure according to claim 1, characterized in that: The output end of the first in-mold multi-layer booster oil cylinder (3) is connected to the push rod (6) via a connecting buckle (11).

7. An in-mold heat-maintaining structure according to any one of claims 1 to 6, characterized in that: It also comprises a second in-mold multi-layer boosting oil cylinder (7), the output end of which is connected to a sprue cutter (8), and the sprue cutter (8) is located at the sprue of the mold body (1).

8. The in-mold heat-holding structure according to claim 7, characterized in that: The bottom of the second in-mold multi-layer booster cylinder (7) is fixed on the bottom plate (4).

9. The in-mold heat-maintaining structure according to claim 1, characterized in that: The mold body (1) further comprises a plurality of groups of square irons (12), wherein the square irons (12) are arranged between the B plate (102) and the bottom plate (4).

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