Single-color or multi-color forming mold capable of achieving multi-density switching

Abstract

The single-color or multi-color forming die comprises a first machine frame, a second machine frame, a material gun and a variable-stroke air cylinder, when the first machine frame and the second machine frame are closed, a die cavity is formed, a die top sliding block is arranged at the discharging end of the material gun and contained in the die cavity, and the variable-stroke air cylinder is arranged in the die cavity. And the variable-stroke air cylinder simultaneously controls the material gun and the sliding block at the top of the mold to move in multiple positions. According to the utility model, the variable-stroke air cylinder is adopted, so that the material gun and the sliding block at the top of the mold can be controlled to move in multiple positions, single-color or multi-color products with various densities can be molded by one mold, and the extrusion of the sliding block at the top of the mold is selectively controlled by the variable-stroke air cylinder, so that the switching molding of two densities and three densities is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of foaming moulds, in particular to a single-colour or multi-colour moulding mould capable of switching between multiple densities. Background Art

[0002] A helmet is a protective article used to improve a person's safety. A helmet usually has an outer shell, a foam lining, and a fabric lining. The foam lining has good cushioning properties and can improve the safety of the helmet.

[0003] In the prior art, dual-density or multi-density molding equipment usually uses two or more sets of molds to respectively mold foam liners of different densities, and then combines the foam liners of different densities together by bonding. This method requires multiple sets of molds and subsequent processing and manufacturing, which seriously affects production efficiency and has high production costs. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide a single-color or multi-color molding die capable of multi-density switching.

[0005] The purpose of the utility model is achieved through the following technical scheme: a single-color or multi-color molding mold capable of multi-density switching, comprising a first machine frame, a second machine frame, a material gun and a variable-stroke cylinder, when the first machine frame and the second machine frame are molded together, a mold cavity is formed, the discharge end of the material gun is provided with a mold top slider, the mold top slider is accommodated in the mold cavity, and the variable-stroke cylinder simultaneously controls the movement of multiple positions of the material gun and the mold top slider.

[0006] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, when the material gun fills the mold cavity for the first time, the top slider of the mold is controlled by the variable stroke cylinder to retract to the first stroke position, and the retracted distance is 4mm, the local space of the mold cavity is increased, the feeding space at the top is increased, and a first density material layer is formed in the mold cavity;

[0007] The top slider of the mold is controlled by the variable stroke cylinder to move forward to the second stroke position, and the forward movement distance is 4mm. The top slider of the mold extrude a part of the first density material layer, and the extruded part of the first density material layer is cooled to form a second density material layer; the density of the foam raw material at the top position is increased, and the density of the second density material layer is greater than the density of the first density material layer.

[0008] When the mold top slider is controlled by the variable stroke cylinder to move to the third stroke position, a filling space is formed between the second density material layer and the mold top slider, and the material gun fills the filling space for the second time to form a third density material layer after cooling.

[0009] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, the first density material layer and the second density material layer are foaming materials of the same color, the first density material layer and the third density material layer are two low-density foaming materials, and the first density material layer and the third density material layer are the same color or different colors.

[0010] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, when the top slider of the mold is not controlled by the variable stroke cylinder to move and extrude a part of the first density material layer, the local density of the first density material layer remains unchanged. When the top slider of the mold does not extrude a part of the first density material layer, the first density material layer has only one density, and the molded product at this time becomes a product with two densities.

[0011] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, when the top slider of the mold is in the first stroke position, the local filling space of the mold cavity is increased, and the distance between the first stroke position and the second stroke position of the top slider of the mold is the same.

[0012] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, it also includes a support plate, which is arranged on the outside of the first machine frame, the variable stroke cylinder is fixedly mounted on the support plate, and the material gun is penetrated through the support plate.

[0013] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, it also includes a connecting plate, which is accommodated in the first machine frame, one end of the connecting plate is connected to the piston rod end of the variable stroke cylinder, and the other end is connected to the material gun, a connecting rod is provided in the middle of the connecting plate, the other end of the connecting rod is connected to the mounting plate, one end of the mounting plate is connected to the material gun, and the top slider of the mold is installed on the mounting plate.

[0014] As an improvement of the single-color or multi-color molding die capable of multi-density switching of the utility model, a cooling water pipe is further provided in the first machine frame, and a plurality of atomizing heads are arranged at intervals on the cooling water pipe.

[0015] As an improvement of the single-color or multi-color molding mold capable of multi-density switch, the utility model further comprises a foam rubber barrel, and the material gun is connected to the foam rubber barrel through a pipeline.

[0016] As an improvement of the single-color or multi-color molding mold capable of multi-density switching of the utility model, there are two foam rubber barrels, the foam rubber in the two foam rubber barrels is the same or different in color, and the foam rubber in the two foam rubber barrels is different in density. When molding a single-color multi-density product, the foam rubber in the two foam rubber barrels is the same in color, and when molding a multi-color multi-density product, the foam rubber in the two foam rubber barrels is different in color. When the material gun delivers the raw material of the first foam rubber barrel, the other foam rubber barrel is closed to deliver the foam rubber.

[0017] The beneficial effects of the utility model are as follows: the utility model adopts a variable-stroke cylinder, which can control the movement of multiple positions of the material gun and the top slider of the mold, so as to realize the one-mold molding of single-color or multi-color products of multiple densities, and the extrusion of the top slider of the mold is controlled by the selection of the variable-stroke cylinder to realize the switching molding of two densities and three densities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of the utility model after removing the second machine frame and the first machine frame;

[0020] Figure 3 This is a partial structural schematic diagram of the material gun of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the foamed material lining of the helmet after molding of the utility model;

[0022] Figure 5 This is a schematic diagram of the first stroke position of the top slider of the mold of the utility model;

[0023] Figure 6 This is a schematic diagram of the second stroke position of the top slider of the mold of the utility model;

[0024] Figure 7 It is a schematic diagram of the third stroke position of the top slider of the mold of the utility model;

[0025] The accompanying drawings are marked as follows: 1. first machine frame, 2. second machine frame, 3. material gun, 4. variable stroke cylinder, 5. mold top slider, 6. support plate, 7. connecting plate, 8. connecting rod, 9. mounting plate, 10. cooling water pipe, 11. atomizing head, 12. foam barrel, 13. first density material layer, 14. second density material layer, 15. third density material layer, 16. mold core. DETAILED DESCRIPTION

[0026] 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 of 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.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] like Figure 1-Figure 7 As shown, a single-color or multi-color molding mold capable of multi-density switching includes a first machine frame 1, a second machine frame 2, a material gun 3 and a variable stroke cylinder 4. When the first machine frame 1 and the second machine frame 2 are molded together, a mold cavity is formed, and a mold top slider 5 is provided at the discharge end of the material gun 3. The mold top slider 5 is accommodated in the mold cavity, and the variable stroke cylinder 4 simultaneously controls the movement of multiple positions of the material gun 3 and the mold top slider 5. The corresponding surfaces of the first machine frame 1 and the second machine frame 2 are both provided with a mold core 16, and the mold cavity is formed between the two mold cores.

[0030] Preferably, when the material gun 3 fills the mold cavity for the first time, the slider 5 at the top of the mold is controlled by the variable stroke cylinder 4 to retract to the first stroke position, and the retracted distance is 4 mm, the local space of the mold cavity is increased, the feeding space at the top is increased, and the first density material layer 13 is formed in the mold cavity;

[0031] The top slider 5 of the mold is controlled by the variable stroke cylinder 4 to move forward to the second stroke position, and the forward movement distance is 4 mm. The top slider 5 of the mold extrude a part of the first density material layer, and the extruded part of the first density material layer 13 is cooled to form a second density material layer 14; the density of the foam raw material at the top position is increased, and the density of the second density material layer is greater than the density of the first density material layer.

[0032] When the mold top slider 5 is controlled by the variable stroke cylinder 4 to move to the third stroke position, a filling space is formed between the second density material layer and the mold top slider 5, and the material gun 3 fills the filling space for the second time and forms a third density material layer 15 after cooling.

[0033] Preferably, the first density material layer and the second density material layer are foamed materials of the same color, the first density material layer and the third density material layer are two foamed materials of low density, and the first density material layer and the third density material layer are the same color or different colors.

[0034] Preferably, when the mold top slider 5 is not controlled by the variable stroke cylinder 4 to move and squeeze a part of the first density material layer, the local density of the first density material layer remains unchanged. When the mold top slider 5 does not squeeze a part of the first density material layer, the first density material layer has only one density, and the molded product becomes a product with two densities.

[0035] Preferably, when the mold top slider 5 is located at the first stroke position, the local filling space of the mold cavity increases, and the distance between the first stroke position and the second stroke position of the mold top slider 5 is the same.

[0036] Preferably, it further includes a support plate 6 , which is arranged on the outside of the first machine frame 1 , the variable stroke cylinder 4 is fixedly mounted on the support plate 6 , and the material gun 3 is penetrated through the support plate 6 .

[0037] Preferably, it also includes a connecting plate 7, which is accommodated in the first machine frame 1, one end of the connecting plate 7 is connected to the piston rod end of the variable stroke cylinder 4, and the other end is connected to the material gun 3, a connecting rod 8 is provided in the middle of the connecting plate 7, the other end of the connecting rod 8 is connected to the mounting plate 9, one end of the mounting plate 9 is connected to the material gun 3, and the mold top slider 5 is installed on the mounting plate 9.

[0038] Preferably, a cooling water pipe 10 is further provided in the first machine frame 1 , and a plurality of atomizing heads 11 are arranged at intervals on the cooling water pipe 10 .

[0039] Preferably, it also includes a foaming rubber barrel 12, and the material gun 3 is connected to the foaming rubber barrel 12 through a pipeline 13.

[0040] Preferably, there are two foam glue barrels 12, and the foam glue in the two foam glue barrels 12 has the same or different colors, and the foam glue in the two foam glue barrels 12 has different densities. When molding a single-color multi-density product, the foam glue in the two foam glue barrels 12 has the same color, and when molding a multi-color multi-density product, the foam glue in the two foam glue barrels 12 has different colors. When the material gun 3 delivers the raw material of the first foam glue barrel, the other foam glue barrel 12 is closed to deliver the foam glue.

[0041] The molding steps of the utility model are as follows:

[0042] 1. Mold loading (the position of the slider at the top of the mold is between the boundary of the second density material layer and the third density material layer)

[0043] 2. Mold closing: the first machine frame and the second machine frame are molded together to form a mold cavity;

[0044] 3. The variable stroke cylinder controls the top slide of the mold to retract 4mm to the first stroke position, increasing the top feeding space and feeding amount; Figure 5 Position shown;

[0045] 4. The material gun fills the mold cavity for the first time, and after cooling and molding, the first density material is formed. The foamed material filled this time forms the first density material layer and the second density material layer.

[0046] 5. The variable stroke cylinder drives the top slide of the mold to move forward and compress 4mm to the second stroke position (such as Figure 6 As shown), the density of the foam rubber raw material at the top is increased, and the top foam rubber is squeezed to form a second density material layer with a density greater than that of the first density material layer;

[0047] 6. Molding + cooling, without opening the mold;

[0048] 7. The variable stroke cylinder drives the top slide of the mold to retract to the limit position and reach the third stroke position (such as Figure 7 shown);

[0049] 8. The second filling of the material gun, the density of the second filling foam is different from the density of the first filling foam; 9. Forming + cooling, open the mold, and remove the product. The variable stroke cylinder drives the top slide of the mold to move from the third stroke to the second stroke position.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and structures of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-color or multi-color molding die capable of multi-density switching, characterized in that: It includes a first machine frame, a second machine frame, a material gun and a variable-stroke cylinder. When the first machine frame and the second machine frame are molded together, a mold cavity is formed. The discharge end of the material gun is provided with a mold top slider, and the mold top slider is accommodated in the mold cavity. The variable-stroke cylinder simultaneously controls the movement of multiple positions of the material gun and the mold top slider.

2. The single-color or multi-color molding die capable of multi-density switching according to claim 1, characterized in that: When the material gun fills the mold cavity for the first time, the top slider of the mold is located at the first stroke position, and a first density material layer is formed in the mold cavity; When the mold top slider is controlled by the variable stroke cylinder to move to the second stroke position, the mold top slider extrude a part of the first density material layer, and the extruded part of the first density material layer is cooled to form a second density material layer; When the mold top slider is controlled by the variable stroke cylinder to move to the third stroke position, a filling space is formed between the second density material layer and the mold top slider, and the material gun fills the filling space for the second time to form a third density material layer after cooling.

3. The single-color or multi-color molding die capable of multi-density switching according to claim 2, characterized in that: The first density material layer and the second density material layer are foamed materials of the same color, the first density material layer and the third density material layer are two foamed materials of low density, and the first density material layer and the third density material layer are the same color or different colors.

4. The single-color or multi-color molding die capable of multi-density switching according to claim 2, characterized in that: When the mold top slider is not controlled by the variable stroke cylinder to move and extrude a portion of the first density material layer, the local density of the first density material layer remains unchanged.

5. The single-color or multi-color molding die capable of multi-density switching according to claim 2, characterized in that: When the top slider of the mold is located at the first stroke position, the local filling space of the mold cavity increases, and the distance between the first stroke position and the second stroke position of the top slider of the mold is the same.

6. The single-color or multi-color molding die capable of multi-density switching according to claim 1, characterized in that: It also includes a support plate, which is arranged on the outside of the first machine frame, the variable stroke cylinder is fixedly mounted on the support plate, and the material gun is penetrated through the support plate.

7. The single-color or multi-color molding die capable of multi-density switching according to claim 6, characterized in that: It also includes a connecting plate, which is accommodated in the first machine frame, one end of the connecting plate is connected to the piston rod end of the variable stroke cylinder, and the other end is connected to the material gun, a connecting rod is provided in the middle of the connecting plate, the other end of the connecting rod is connected to the mounting plate, one end of the mounting plate is connected to the material gun, and the mold top slider is installed on the mounting plate.

8. The single-color or multi-color molding die capable of multi-density switching according to claim 1, characterized in that: A cooling water pipe is also provided in the first machine frame, and a plurality of atomizing heads are arranged at intervals on the cooling water pipe.

9. The single-color or multi-color molding die capable of multi-density switching according to claim 1, characterized in that: It also includes a foaming rubber barrel, and the material gun is connected to the foaming rubber barrel through a pipeline.

10. The single-color or multi-color molding die capable of multi-density switching according to claim 9, characterized in that: There are two foam rubber barrels, the foam rubbers in the two foam rubber barrels are of the same or different colors, and the foam rubbers in the two foam rubber barrels are of different densities.

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