阅读说明：本技术 自行车鞍座、鞍座成型模具及鞍座成型工艺 (Bicycle saddle, saddle forming die and saddle forming process ) 是由 梅声高 于 2021-10-25 设计创作，主要内容包括：本发明提供了一种自行车鞍座、鞍座成型模具及鞍座成型工艺,它解决了现有的鞍座寿命不佳的问题。本发明中,自行车鞍座,包括从上到下依次设置的记忆棉层、高回弹棉层和鞍座底壳,高回弹棉层的顶壁上成型有形状和尺寸均与记忆棉层匹配的凹腔,且凹腔在腔口处的内径由里到外逐渐变小；记忆棉层通过注塑方式一体成型在凹腔中,且记忆棉层的上侧伸出凹腔；模具包括凹模、第一凸模和第二凸模,第一凸模和凹模之间形成用于成型高回弹棉层的腔体一,第二凸模和凹模之间形成用于成型记忆棉层的腔体二；工艺包括以下步骤：A、成型记忆棉层；B、成型高回弹棉层；C、修边。本发明寿命长。(The invention provides a bicycle saddle, a saddle forming die and a saddle forming process, which solve the problem of poor service life of the conventional saddle. The bicycle saddle comprises a memory cotton layer, a high resilience cotton layer and a saddle bottom shell which are sequentially arranged from top to bottom, wherein a concave cavity matched with the memory cotton layer in shape and size is formed on the top wall of the high resilience cotton layer, and the inner diameter of the concave cavity at a cavity opening is gradually reduced from inside to outside; the memory cotton layer is integrally formed in the concave cavity in an injection molding mode, and the upper side of the memory cotton layer extends out of the concave cavity; the mold comprises a female mold, a first male mold and a second male mold, a first cavity for molding the high-resilience cotton layer is formed between the first male mold and the female mold, and a second cavity for molding the memory cotton layer is formed between the second male mold and the female mold; the process comprises the following steps: A. forming a memory cotton layer; B. forming a high resilience cotton layer; C. and (6) trimming. The invention has long service life.)

1. The bicycle saddle comprises a memory cotton layer (1), a high resilience cotton layer (2) and a saddle bottom shell (3) which are sequentially arranged from top to bottom, and is characterized in that a concave cavity (2a) with the shape and the size matched with the memory cotton layer (1) is formed on the top wall of the high resilience cotton layer (2), and the inner diameter of the concave cavity (2a) at a cavity opening is gradually reduced from inside to outside; the memory cotton layer (1) is integrally formed in the concave cavity (2a) in an injection molding mode, and the upper side of the memory cotton layer (1) extends out of the concave cavity (2 a).

2. Bicycle saddle according to claim 1, characterised in that the bottom wall of said cavity (2a) is provided with a positioning hole, and the memory cotton layer (1) extends inwards of the positioning hole and is integrally formed with a projection (1a) having dimensions matching those of the positioning hole.

3. A bicycle saddle according to claim 2, in which the locating holes are blind holes; the positioning hole is formed in the middle of the bottom wall of the cavity (2 a).

4. A bicycle saddle according to claim 2 or 3, in which the locating holes are straight holes.

5. Bicycle saddle according to claim 1 or 2 or 3, characterised in that the memory cotton layer (1) is made of a polyether slow rebound MA4425, a polyurethane modified MDI and a catalyst, and the ratio of the polyether slow rebound MA4425, the polyurethane modified MDI and the catalyst is 100:36: 1.

6. Bicycle saddle according to claim 1 or 2 or 3, in which the high resilience cotton layer (2) is made of PU polyurethane 501H, PU polyurethane 601D and a catalyst, and the ratio of PU polyurethane 501H, PU polyurethane 601D and catalyst is 60:40: 1.

7. The bicycle saddle forming die comprises a female die (6) with a forming cavity (6b) and a first male die (4) with a saddle bottom shell (3), wherein a first cavity (7) for forming a high-resilience cotton layer (2) is formed between the saddle bottom shell (3) and the inner wall of the forming cavity (6b), and the bicycle saddle forming die is characterized by further comprising a second male die (5), the second male die (5) comprises a convex column (5a) extending into the forming cavity (6b), and the bottom wall of the convex column (5a) can be pressed on the bottom wall of the forming cavity (6b) to form sealing; the forming cavity (6b) is provided with a first groove (6a) which is right opposite to the convex column (5a) in the bottom wall, a second groove (5b) is correspondingly arranged on the convex column (5a) in the bottom wall, a second cavity (8) for forming the memory cotton layer (1) is formed between the first groove (6a) and the second groove (5b), and the second cavity (8) is communicated with the outside through an injection hole (5c) formed in the second convex mold (5).

8. Bicycle saddle-forming die according to claim 7, wherein the injection holes (5c) are straight and vertically arranged; the injection holes (5c) are provided with two orifices, one orifice of the injection holes (5c) is positioned on the bottom wall of the second groove (5b), and the other orifice of the injection holes (5c) is positioned on the top wall of the second male die (5).

9. The bicycle saddle-forming die according to claim 7 or 8, wherein the bottom wall of the protruding post (5a) is provided with an annular groove at the edge of the notch of the second groove (5b), the annular groove is coaxially arranged with the second groove (5b), a sealing ring (9) is arranged in the annular groove, and two end faces of the sealing ring (9) are respectively pressed tightly on the bottom wall of the annular groove and the bottom wall of the forming cavity (6 b).

10. A bicycle saddle forming process is characterized by comprising the following steps:

A. forming memory cotton layer (1): closing the second male die (5) and the female die (6), injecting a memory cotton layer (1) raw material into the second cavity (8) through an injection hole (5c) in the second male die (5), then plugging the injection hole (5c), and removing the second male die (5) after waiting for 2 minutes;

B. molding the high-resilience cotton layer (2): moving the first male die (4) to a position above the female die (6), then filling the raw material of the high-resilience cotton layer (2) into the forming cavity (6b) of the female die (6), then closing the first male die (4) and the female die (6), deflating after waiting for 3 minutes, and finally moving the first male die (4) and taking out a finished product;

C. trimming: and D, finishing the finished product produced in the step B.

Technical Field

The invention relates to a bicycle saddle, in particular to a bicycle saddle, a saddle forming die and a saddle forming process.

Background

Saddles are an important component of bicycles and are used to support the buttocks of the rider.

Existing saddles typically include a rigid bottom shell and an elastomeric body attached to the upper side of the bottom shell and which contacts the buttocks of the rider. In order to improve the sitting and holding comfort of riders, the conventional elastic body consists of a memory cotton layer and a high-resilience cotton layer, and the high-resilience cotton layer is positioned between the bottom shell and the memory cotton layer.

When the saddle is machined, the high-resilience cotton layer and the bottom shell are formed into an integral piece through injection molding of a die; the memory cotton layer is formed by injection molding through a mold, and then the high-resilience cotton layer and the memory cotton layer are fixed in a bonding mode. As the bicycle is basically used in the conditions of wind, rain and sunshine, the bonding mode is easy to cause the phenomenon of glue opening, and the service life is not good.

Disclosure of Invention

The present invention aims to solve the above problems of the prior art and to provide a saddle for bicycles, which is structurally stable and has a long life.

The second object of the present invention is: provides a bicycle saddle forming die convenient to operate.

A third object of the invention is: provides a bicycle saddle forming process convenient for forming.

The first object of the present invention can be achieved by the following technical solutions: the bicycle saddle comprises a memory cotton layer, a high resilience cotton layer and a saddle bottom shell which are sequentially arranged from top to bottom, and is characterized in that a concave cavity with the shape and the size matched with the memory cotton layer is formed on the top wall of the high resilience cotton layer, and the inner diameter of the concave cavity at a cavity opening is gradually reduced from inside to outside; the memory cotton layer is integrally formed in the cavity in an injection molding mode, and the upper side of the memory cotton layer extends out of the cavity.

The memory cotton layer is formed in the cavity in an injection molding mode, so that the memory cotton layer is formed according to the shape and the size of the cavity, and the cavity orifice of the cavity with the inner diameter gradually reduced from inside to outside is utilized to limit the memory cotton layer to move outwards to be separated from the cavity, so that the connection strength of the memory cotton layer and the high-resilience cotton layer is effectively enhanced, and the structural stability and the service life of the saddle are enhanced.

In the bicycle saddle, the bottom wall of the concave cavity is provided with a positioning hole, and the memory cotton layer extends into the positioning hole to be integrally formed with a convex part with the size matched with the positioning hole. Convex part and locating hole cooperation not only can increase the area of contact on cotton layer of memory and the cotton layer of high resilience, form radial spacing again, further strengthen the cotton layer of memory and the cotton layer connection stability of high resilience to strengthen saddle structural stability.

In the bicycle saddle, the positioning holes are blind holes, so that the use comfort is enhanced.

In the bicycle saddle, the positioning hole is formed in the middle of the bottom wall of the concave cavity, so that the purpose of reinforcing the saddle structure is stably achieved.

In the bicycle saddle, the positioning hole is in a straight hole shape, so that the demoulding and the separation after the injection moulding are facilitated.

In the bicycle saddle described above, the protrusion is cylindrical, i.e. at this time, the positioning hole is a circular hole.

In the bicycle saddle, the memory cotton layer is made of the slow rebound polyether MA4425, the polyurethane modified MDI and the catalyst, and the ratio of the slow rebound polyether MA4425 to the polyurethane modified MDI to the catalyst is 100:36: 1. Wherein the catalyst is a composite catalyst composed of silicone oil, a pore-opening agent, a pore-closing agent, diethanolamine and the like.

In the bicycle saddle, the high-resilience cotton layer is made of PU polyurethane 501H, PU polyurethane 601D and a catalyst, and the ratio of the PU polyurethane 501H, PU polyurethane 601D to the catalyst is 60:40: 1. Wherein the catalyst is a composite catalyst composed of silicone oil, a pore-opening agent, a pore-closing agent, diethanolamine and the like.

The second object of the present invention can be achieved by the following technical solutions: the bicycle saddle forming die is characterized by further comprising a second male die, wherein the second male die comprises a convex column extending into the forming cavity, and the bottom wall of the convex column can be pressed on the bottom wall of the forming cavity to form sealing; a first groove opposite to the convex column is formed in the bottom wall of the forming cavity, a second groove is correspondingly formed in the bottom wall of the convex column, a second cavity used for forming the memory cotton layer is formed between the first groove and the second groove, and the second cavity is communicated with the outside through an injection hole formed in the second convex mold.

The using process is as follows: first second terrace die and die cooperation shaping memory cotton layer, then remove the second terrace die, first terrace die and die cooperation are followed and are gone up the cotton layer of direct forming high resilience on the cotton layer of memory for the cotton layer forming process of high resilience and with the connection process on the cotton layer of memory these both go on in step, so not only effectively simplify the operating procedure, improve processing convenience and efficiency, make the cotton layer of high resilience and the cotton layer direct injection moulding of memory moreover, it is comparatively firm to connect.

In the bicycle saddle forming die described above, the injection hole is provided with two orifices, one of which is located on the second bottom wall of the groove and the other of which is located on the top wall of the second punch. The injection hole is directly communicated with the second cavity, so that raw material conveying is facilitated, and the forming efficiency and quality are improved.

In the bicycle saddle forming die, the injection hole is in a straight strip shape and is vertically arranged.

In the bicycle saddle forming die, the annular groove is formed in the edge of the bottom wall of the convex column at the opening of the second groove, the annular groove and the second groove are coaxially arranged, the sealing ring is arranged in the annular groove, and two end faces of the sealing ring are respectively tightly pressed on the bottom wall of the annular groove and the bottom wall of the forming cavity, so that the sealing effect formed between the convex column and the concave die is further enhanced, and the working stability of the die is enhanced.

The third object of the present invention can be achieved by the following technical solutions: a bicycle saddle forming process is characterized by comprising the following steps:

A. forming a memory cotton layer: closing the second male die and the female die, injecting a memory cotton layer raw material into the second cavity through the injection hole in the second male die, then plugging the injection hole, and removing the second male die after waiting for 2 minutes;

B. forming a high-resilience cotton layer: moving a first male die to a position above a female die, then filling a high-resilience cotton layer raw material into a female die forming cavity, then closing the first male die and the female die, deflating after waiting for 3 minutes, and finally moving the first male die away and taking out a finished product;

C. trimming: and D, finishing the finished product produced in the step B.

Compared with the prior art, the bicycle saddle, the saddle forming die and the saddle forming process have the following advantages:

1. the memory cotton layer is formed in the cavity in an injection molding mode, so that the memory cotton layer is formed according to the shape and the size of the cavity, and the cavity orifice of the cavity with the inner diameter gradually reduced from inside to outside is utilized to limit the memory cotton layer to move outwards to be separated from the cavity, so that the connection strength of the memory cotton layer and the high-resilience cotton layer is effectively enhanced, and the structural stability and the service life of the saddle are enhanced.

2. The cotton layer of the high resilience of direct forming on the cotton layer of memory for the cotton layer forming process of high resilience and these both go on in step with the connection process on the cotton layer of memory, so not only effectively simplify the operating procedure, improve processing convenience and efficiency, make the cotton layer of high resilience and the cotton layer direct injection moulding of memory moreover, it is comparatively firm to connect.

Drawings

FIG. 1 is a top plan structural schematic view of a bicycle saddle.

FIG. 2 is a cross-sectional structural schematic view of the bicycle saddle.

Fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

Fig. 4 is a schematic structural view of the state that the female die and the second male die are closed.

Fig. 5 is an enlarged schematic view of B in fig. 4.

Fig. 6 is a schematic structural view of the state that the female die is closed with the first male die.

Fig. 7 is a schematic perspective view of the female mold.

Fig. 8 is a schematic perspective view of the first male die.

Fig. 9 is a schematic perspective view of the second punch.

In the figure, 1, a memory cotton layer; 1a, a convex part; 2. a high resilience cotton layer; 2a, a concave cavity; 3. a saddle bottom shell; 4. a first male die; 5. a second male die; 5a, a convex column; 5b, a second groove; 5c, an injection hole; 6. a female die; 6a, a first groove; 6b, forming a cavity; 7. a first cavity; 8. a second cavity; 9. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figures 1 and 2, the bicycle saddle comprises a memory cotton layer 1, a high resilience cotton layer 2 and a saddle bottom shell 3 which are arranged in sequence from top to bottom.

Wherein the content of the first and second substances,

the saddle bottom shell 3 is made of rigid material and plays a supporting role.

The memory cotton layer 1 is made of a polyether slow rebound MA4425, a polyurethane modified MDI and a catalyst, and the ratio of the polyether slow rebound MA4425 to the polyurethane modified MDI to the catalyst is 100:36: 1. The high-resilience cotton layer 2 is made of PU polyurethane 501H, PU polyurethane 601D and a catalyst, and the ratio of the PU polyurethane 501H, PU polyurethane 601D to the catalyst is 60:40: 1. In this embodiment, the catalyst is a composite catalyst composed of silicone oil, a pore-forming agent, a pore-closing agent, diethanolamine, and the like.

As shown in fig. 2 and 3, a concave cavity 2a with the shape and the size matched with those of the memory cotton layer 1 is formed on the top wall of the high-resilience cotton layer 2, and the inner diameter of the concave cavity 2a at the cavity opening is gradually reduced from inside to outside; the memory cotton layer 1 is integrally formed in the cavity 2a in an injection molding mode, and the upper side of the memory cotton layer 1 extends out of the cavity 2 a. Memory cotton layer 1 is through the mode shaping of moulding plastics in cavity 2a, makes memory cotton layer 1 according to cavity 2a shape and size shaping to utilize the cavity 2a accent that the internal diameter diminishes gradually from inside to outside, with restriction memory cotton layer 1 toward removing outward and break away from cavity 2a, thereby effectively strengthen memory cotton layer 1 and the high joint strength who kick-backs cotton layer 2, with reinforcing saddle structural stability and life-span.

Further, the middle part of the bottom wall of the concave cavity 2a is provided with a positioning hole, and the type of the positioning hole is a blind hole. Memory cotton layer 1 extends integrated into one piece to the locating hole and has the convex part 1a that forms and the size all matches with the locating hole, not only can increase the area of contact of cotton layer 1 of memory and high resilience cotton layer 2 like this, forms radial spacing again, further strengthens memory cotton layer 1 and high resilience cotton layer 2 connection stability to strengthen saddle structural stability. Preferably, the positioning hole is straight and has a circular cross section, and at the moment, the convex part 1a is cylindrical, so that demolding and separation after injection molding are facilitated.

As shown in fig. 4, 5, 6, 7, 8 and 9, the bicycle saddle-forming die comprises a second male die 5, a female die 6 provided with a forming cavity 6b and a first male die 4 with a saddle bottom shell 3.

Wherein the content of the first and second substances,

a first cavity 7 for forming the high-resilience cotton layer 2 is formed between the saddle bottom shell 3 and the inner wall of the forming cavity 6 b.

The second male die 5 comprises a convex pillar 5a extending into the forming cavity 6b, and the bottom wall of the convex pillar 5a can be pressed on the bottom wall of the forming cavity 6b and form a seal. A first groove 6a opposite to the convex column 5a is formed in the bottom wall of the forming cavity 6b, a second groove 5b is correspondingly formed in the bottom wall of the convex column 5a, a second cavity 8 for forming the memory cotton layer 1 is formed between the first groove 6a and the second groove 5b, and the second cavity 8 is communicated with the outside through an injection hole 5c formed in the second convex mold 5.

In this embodiment, the injection hole 5c is straight and vertically arranged, at this time, the injection hole 5c has two orifices, one of the orifices of the injection hole 5c is located on the bottom wall of the second groove 5b, and the other orifice of the injection hole 5c is located on the top wall of the second male die 5, so that the injection hole 5c is directly communicated with the second cavity 8, which is beneficial to conveying raw materials and improves the molding efficiency and quality.

Further, the bottom wall of the convex column 5a is provided with an annular groove at the edge of the notch of the second groove 5b, the annular groove and the second groove 5b are coaxially arranged, a sealing ring 9 is arranged in the annular groove, and two end faces of the sealing ring 9 are respectively tightly pressed on the bottom wall of the annular groove and the bottom wall of the forming cavity 6b, so that the sealing effect formed between the convex column 5a and the concave mold 6 is further enhanced, and the working stability of the mold is enhanced.

The bicycle saddle forming process comprises the following steps:

A. forming a memory cotton layer 1: closing the second male die 5 and the female die 6, injecting the raw material of the memory cotton layer 1 into the cavity II 8 through the injection hole 5c on the second male die 5, then plugging the injection hole 5c, and removing the second male die 5 after waiting for 2 minutes;

B. molding the high-resilience cotton layer 2: moving the first male die 4 to a position above the female die 6, then filling the raw material of the high-resilience cotton layer 2 into the forming cavity 6b of the female die 6, then closing the first male die 4 and the female die 6, deflating after waiting for 3 minutes, and finally moving the first male die 4 and taking out a finished product;

C. trimming: and D, finishing the finished product produced in the step B.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.