Forming die

Abstract

The utility model relates to the technical field of dies, in particular to a forming die which comprises a bottom plate, a first through hole is formed in the middle of the bottom plate, and sliding grooves are formed in the tops of the front side and the rear side of the bottom plate; the two sliding blocks are detachably arranged at the top of the bottom plate, first limiting pieces are fixedly arranged at the bottoms of the front side and the rear side of each sliding block, the first limiting pieces are matched with the sliding grooves, semicircular grooves are formed in the opposite sides of the two sliding blocks, and a circular through hole is defined by the two semicircular grooves; the wedge plate is detachably arranged at the tops of the two sliding blocks, and the inner wall of the top of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole and part of the outer wall of the mold core form a mold cavity; according to the combined design of the parts of the die cavity and the pressurization of the convex die on the liquid polyurethane raw material, air sealed in the edge part of the die cavity can be effectively exhausted through tiny gaps formed by splicing surfaces among the parts of the die, so that bubbles are prevented from being formed in a product.

Description

Technical Field

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

[0002] Polyurethane products occupy an important position in industrial production due to their excellent physical properties and wide range of applications. The manufacturing process of polyurethane products typically involves pouring polyurethane raw materials into a mold, allowing it to cure, and then removing it from the mold to form the final product. However, in actual production, especially when the surface shape of the mold cavity is complex, with features such as thin walls and narrow grooves, a series of technical problems arise during the pouring process.

[0003] During the casting process of polyurethane raw materials, the high viscosity of the raw materials restricts their flowability. When the raw material casting channel has a mold cavity with a complex surface shape and fine structure, especially at the edges of the cavity, the flow rate of the raw material will be significantly reduced due to increased flow resistance. In this case, it is difficult for air in the mold cavity to be completely expelled, and it is easily trapped in the edges of the cavity during the flow of the raw material. As the polyurethane raw material further cures, the trapped air will form a large number of bubbles inside the product. These bubbles not only affect the appearance quality of the product, but may also reduce its physical properties, such as strength and wear resistance.

[0004] To address this issue, there is an urgent need to develop a technology that can effectively reduce air bubbles on the surface of polyurethane products, thereby improving product quality and reducing production costs for enterprises. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a molding die.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The first aspect of this utility model is to provide a molding die, comprising:

[0008] The base plate has a first through hole in the middle and sliding grooves on the top of the front and rear sides.

[0009] Two sliders are detachably mounted on the top of the base plate. First limiting members are fixedly mounted on the bottom of the front and rear sides of the sliders. The first limiting members match the slide groove. Semi-circular grooves are opened on the opposite side of the two sliders. The two semi-circular grooves form a circular through hole. The axis of the circular through hole is collinear with the axis of the first through hole.

[0010] A wedge plate is detachably mounted on top of two sliders. A second through hole, whose axis is collinear with the axis of the first through hole, is formed in the middle of the wedge plate. Second limiting members are fixedly mounted on the bottom left and right sides of the wedge plate, and these two second limiting members abut against the outer edges of the left and right sides of the two sliders.

[0011] The bottom of the core is detachably installed in the first through hole, and the top of the core is installed in the circular through hole and the second through hole;

[0012] The mold cavity is formed by the top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core.

[0013] Preferably, it further includes:

[0014] The feeding plate is detachably mounted on top of the wedge plate.

[0015] Preferably, it further includes:

[0016] The punch is detachably mounted on top of the feed plate.

[0017] Preferably, the feeding plate has a third through hole in the middle, the axis of which is collinear with the axis of the first through hole; the punch includes: a punch body and a second part, the punch body is disposed on the top of the feeding plate, and the second part is disposed in the third through hole.

[0018] Preferably, it further includes:

[0019] Guide pillars;

[0020] The base plate has through-holes on both the left and right sides, the wedge plate has through-holes on both the left and right sides, and the feeding plate has through-holes on both the left and right sides. The first, second, and third positioning holes are coaxially arranged. The guide post is detachably installed in the first, second, and third positioning holes.

[0021] Preferably, the mold cavity is an assumed geometric space formed by rotating a tuning fork-like shape around the axis of the first through hole;

[0022] The tuning fork-like shape is composed of the top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core.

[0023] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0024] The modular design of the mold cavity components and the pressurization of the liquid polyurethane material by the punch in this invention effectively expel air trapped in the mold cavity edges through the tiny gaps formed by the joint surfaces between the mold components. This prevents the formation of air bubbles in the product, which not only improves the appearance quality of the product but also ensures the stability of its physical properties. This invention has a simple structure and is easy to operate. During the polyurethane material pouring process, it is only necessary to pour the polyurethane material into the mold cavity and then apply pressure to the punch. In addition, the modular design of this invention facilitates cleaning and maintenance, extending the service life of the mold. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the exploded structure of the lower axial side of this utility model;

[0026] Figure 2 This is a schematic diagram of the exploded structure on the upper axial side of this utility model;

[0027] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0028] Figure 4 This is a schematic diagram of the present invention with the punch 5 removed;

[0029] Figure 5 This is a top view of the structure of this utility model with the wedge plate 3, feeding plate 4, and punch 5 removed.

[0030] Figure 6 This is a top view of the structure of this utility model with the punch 5 removed;

[0031] The reference numerals in the drawings of this utility model are as follows: base plate 1; slider 2; wedge plate 3; feeding plate 4; punch 5; core 6; guide post 7; mold cavity 8; first limiting member 10; product 9; slide groove 11; semi-circular groove 12; second limiting member 13; punch body 14; second part 15; fifth step part 71; second gap 121; third gap 122; fourth gap 123; first gap 124; fifth gap 125. Detailed Implementation

[0032] The specific embodiments of this utility model will be described in detail below.

[0033] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0034] The word "comprising" or similar terms used in this utility model patent application specification and claims mean that the objects preceding "comprising" include the objects listed after "comprising" or their equivalents, and do not exclude other objects.

[0035] The numerical values ​​mentioned in this invention include all values ​​increasing one unit at a time from low to high, assuming that there is at least a two-unit interval between any lower and higher value. For example, if a component quantity or a physical quantity is said to be better from 1 to 100, 10 to 90, and 20 to 80, it means that values ​​such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, and 41 to 49 are clearly listed in this specification; for values ​​less than 1, 0.0001, 0.001, 0.01, or 0.1 are considered suitable units. The foregoing examples are for illustrative purposes only; in practice, all combinations of values ​​between the lowest and highest listed values ​​are considered to be clearly listed in this specification in a similar manner. Example

[0036] This embodiment provides a molding die, including:

[0037] The base plate 1 has a first through hole in the middle and sliding grooves 11 on the top of the front and rear sides.

[0038] Two sliders 2 are detachably mounted on the top of the base plate 1. First limiting members 10 are fixedly mounted on the bottom of the front and rear sides of the sliders 2. The first limiting members 10 match the slide groove 11. Semi-circular grooves 12 are opened on the opposite side of the two sliders 2. The two semi-circular grooves 12 surround a circular through hole. The axis of the circular through hole is collinear with the axis of the first through hole.

[0039] A wedge plate 3 is detachably mounted on the top of the two sliders 2. A second through hole with its axis collinear with the axis of the first through hole is opened in the middle of the wedge plate 3. Second limiting members 13 are fixedly mounted on the bottom of the left and right sides of the wedge plate 3, and the two second limiting members 13 abut against the outer edges of the left and right sides of the two sliders 2. A core 6 is detachably mounted in the first through hole at the bottom, and the top of the core 6 is mounted in the circular through hole and the second through hole.

[0040] The top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core 6 constitute the mold cavity 8.

[0041] It also includes: a feeding plate 4, which is detachably mounted on the top of the wedge plate 3;

[0042] It also includes: a punch 5, which is detachably disposed on the top of the feeding plate 4;

[0043] The feeding plate 4 has a third through hole in its middle, the axis of which is collinear with the axis of the first through hole; the punch 5 includes a punch body 14 and a second part 15, the punch body 14 is disposed on the top of the feeding plate 4, and the second part 15 is disposed in the third through hole;

[0044] The instruction manual states that the bottom of the punch body 14 tapers inward to form a fourth step, and the second part 15 matches the punch body 14.

[0045] This also includes: guide post 7;

[0046] The base plate 1 has through-holes on its left and right sides, the wedge plate 3 has through-holes on its left and right sides, and the feeding plate 4 has through-holes on its left and right sides. The first positioning hole, the second positioning hole, and the third positioning hole are coaxially arranged. The guide post 7 is detachably installed in the first positioning hole, the second positioning hole, and the third positioning hole.

[0047] Wherein: the top of the guide post 7 tapers inward to form a fifth step 71, the bottom outer diameter of the guide post 7 matches the diameter of the first positioning hole, and the top inner diameter of the guide post 7 matches the diameter of the second positioning hole and the diameter of the third positioning hole.

[0048] Wherein, the mold cavity 8 is an assumed geometric space formed by rotating a tuning fork-like shape around the axis of the first through hole;

[0049] The tuning fork-like shape is formed by the top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core 6.

[0050] The first through hole has a first step formed outward on its top inner wall, creating a first gap 124 between the top inner wall of the first through hole and the core 6. The semi-circular groove 12 forms a second step outward and a third step inward from bottom to top, creating a second gap 121 between the bottom inner wall of the circular through hole and the core 6, a third gap 122 between the middle inner wall of the circular through hole and the core 6, and a fourth gap 123 between the top inner wall of the circular through hole and the core 6. The inner wall of the second through hole and the core 6... The fifth gap 125 is present; the length of the second gap 121 is greater than the length of the first gap 124, the length of the third gap 122 is between the length of the first gap 124 and the length of the second gap 121, the length of the fourth gap 123 is equal to the length of the second gap 121, and the length of the fifth gap 125 is equal to the length of the first gap 124. The first gap 124, the second gap 121, the third gap 122, the fourth gap 123, and the fifth gap 125 constitute the tuning fork-like shape.

[0051] In use, the core 6 is placed in the first through hole, the slider 2 is placed on the top of the base plate 1, and the guide post 7 is connected in sequence to the base plate 1, the wedge plate 3, and the feeding plate 4 to pour polyurethane raw material into the mold cavity. The punch 5 is placed on the top of the feeding plate 4. The upper heating plate of the vulcanizing machine presses the punch 5 downward, and the polyurethane raw material located in the third through hole is further squeezed into the mold cavity under pressure. The air sealed in the edge of the mold cavity is discharged through the gap between the components under the pressure of the polyurethane raw material. However, because the gap size is very narrow, the polyurethane raw material cannot flow out from the gap.

[0052] In summary, the combined design of the mold cavity and the pressurization of the liquid polyurethane material by the punch in this invention effectively expel air trapped in the edges of the mold cavity through the tiny gaps formed by the joint surfaces between the various mold components. This prevents the formation of air bubbles in the product, which not only improves the appearance quality of the product but also ensures the stability of its physical properties. This invention has a simple structure and is easy to operate. During the polyurethane material pouring process, it is only necessary to pour the polyurethane material into the mold cavity and then apply pressure to the punch. In addition, the jointing method adopted in this invention also facilitates cleaning and maintenance, extending the service life of the mold.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A molding die, characterized in that, include: The base plate (1) has a first through hole in the middle and sliding grooves (11) on the top of the front and rear sides of the base plate (1). Two sliders (2) are detachably mounted on the top of the base plate (1). The bottom of the front and rear sides of the sliders (2) are fixedly provided with first limiting members (10). The first limiting members (10) match the slide groove (11). A semi-circular groove (12) is provided on the opposite side of the two sliders (2). The two semi-circular grooves (12) surround a circular through hole. The axis of the circular through hole is collinear with the axis of the first through hole. A wedge plate (3) is detachably mounted on the top of the two sliders (2). A second through hole with its axis collinear with the axis of the first through hole is provided in the middle of the wedge plate (3). Second limiting members (13) are fixedly mounted on the bottom left and right sides of the wedge plate (3). The two second limiting members (13) abut against the outer edges of the left and right sides of the two sliders (2). The bottom of the core (6) is detachably disposed in the first through hole, and the top of the core (6) is disposed in the circular through hole and the second through hole; The top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core (6) constitute the mold cavity (8).

2. The molding die according to claim 1, characterized in that, Also includes: Feeding plate (4), which is detachably mounted on top of wedge plate (3).

3. The molding die according to claim 2, characterized in that, Also includes: A punch (5) is detachably mounted on the top of the feeding plate (4).

4. The molding die according to claim 3, characterized in that, The feeding plate (4) has a third through hole in the middle with its axis collinear with the axis of the first through hole; the punch (5) includes a punch body (14) and a second part (15), the punch body (14) is disposed on the top of the feeding plate (4), and the second part (15) is disposed in the third through hole.

5. The molding die according to claim 3, characterized in that, Also includes: Guide post (7); The bottom plate (1) has a through first positioning hole on its left and right sides, the wedge plate (3) has a through second positioning hole on its left and right sides, and the feeding plate (4) has a through third positioning hole on its left and right sides. The first positioning hole, the second positioning hole, and the third positioning hole are coaxially arranged. The guide post (7) is detachably arranged in the first positioning hole, the second positioning hole, and the third positioning hole.

6. The molding die according to claim 1, characterized in that, The mold cavity (8) is a hypothetical geometric space formed by rotating a tuning fork-like shape around the axis of the first through hole; The tuning fork-like shape is formed by the top inner wall of the first through hole, the inner wall of the circular through hole, the inner wall of the second through hole, and part of the outer wall of the core (6).

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