Blowing assembly, blowing demolding structure and PCM hot press molding mold

Abstract

The utility model relates to a hot press forming mold, in particular to a blowing assembly, a blowing demolding structure and a PCM hot press forming mold. Comprising a needle cylinder and an air blowing needle movably arranged in the needle cylinder, an inner cavity of the needle cylinder comprises a first cavity and a second cavity which are communicated with each other, the first cavity is provided with an air blowing opening which is opened outwards, and the second cavity is provided with an air inlet; the blowing needle extends into the first cavity, and the blowing needle is in sealed connection with the first cavity, so that the blowing port is closed; the air blowing needle retracts to the second cavity, and the first cavity communicates with the second cavity, so that the air outlet can blow air outwards to assist in demolding; the air blowing assembly further comprises a driving part used for driving the air blowing needle to stretch into the first cavity or retract into the second cavity. According to the air blowing assembly, the air blowing demolding structure and the PCM hot press forming mold, air blowing is carried out during mold opening, vacuum adsorption can be avoided, therefore, the demolding difficulty is improved, and product scrapping is reduced.

Description

Technical Field

[0001] The present application relates to a hot pressing forming mold, in particular to a blowing component, a blowing demoulding structure and a PCM hot pressing forming mold. Background Art

[0002] The basic process of prepreg molding (PCM) is: put the pretreated molding material into the preheated mold and apply high pressure to make the molding material fill the mold cavity, gradually solidify the molding material under a certain pressure and temperature, then take the product out of the mold, and then perform necessary auxiliary processing to obtain the product. The PCM hot pressing molding mold in the related art does not have a structure for auxiliary demolding, so the product often cannot be demolded smoothly due to vacuum adsorption after demolding, and it is easy to scrap the product by manual prying. Summary of the invention

[0003] In view of this, the present application provides a blowing assembly, a blowing demolding structure and a PCM hot pressing molding mold. By blowing when opening the mold, vacuum adsorption can be avoided, thereby improving demolding difficulties and reducing product scrap.

[0004] In order to achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A blowing assembly, characterized in that it comprises a syringe and a blowing needle movably arranged in the syringe, wherein the inner cavity of the syringe comprises a first chamber and a second chamber which are interconnected, the first chamber has a blowing port open to the outside, and the second chamber has an air inlet;

[0006] The blowing needle extends into the first chamber, and the blowing needle is sealedly connected to the first chamber, thereby closing the blowing port; the blowing needle retracts into the second chamber, and the first chamber and the second chamber are connected, so that the air outlet can blow air outward to assist demoulding; the blowing assembly also includes a driving component for driving the blowing needle to extend into the first chamber or retract into the second chamber.

[0007] The above-mentioned application discloses a blowing assembly. When the mold is demolded, the blowing needle retracts into the second chamber. At this time, the blowing port blows outward, which can avoid vacuum adsorption of the mold, thereby improving demolding difficulties and reducing product scrapping. In addition, the application adopts an independent driving component to drive the blowing needle to perform telescopic movement, which is not easy to get the needle stuck and the movement is more stable. In addition, the application controls the start and stop of the blowing by telescoping the blowing needle relative to the syringe, which can reduce the external colloid from being brought into the blowing assembly.

[0008] In some embodiments, the inner diameter of the second chamber is larger than the inner diameter of the first chamber, and the outer diameter of the insufflation needle is smaller than the inner diameter of the first chamber.

[0009] In some embodiments, the driving component is an oil cylinder connected to the blowing needle. The oil cylinder is adopted because it can provide greater force and can be made relatively small in volume. The internal pressure during PCM mold forming is relatively large, usually reaching above 10 map. Assuming that the force provided by a pneumatic cylinder may not meet the requirements, and if a motor is used to drive the transmission mechanism to achieve the movement of the blowing needle, it will occupy a larger space.

[0010] In some embodiments, a seal is fixedly arranged on the blowing needle. When the blowing needle extends into the first chamber, the seal seals between the blowing needle and the first chamber.

[0011] In some embodiments, the gap L between the first chamber and the blowing needle satisfies 0 < L ≤ 0.01 mm. The purpose of this is that assuming the colloid outside the mold enters the needle sleeve and the gap between the first chamber and the blowing needle is very small, the colloid can only form a very thin film between the first chamber and the blowing needle. When blowing air outwards, the air will automatically blow out this film, which can avoid the problem of gum jamming. L is greater than 0 because the mold will thermally expand, and leaving a certain gap between the first chamber and the blowing needle can prevent the blowing needle from interfering.

[0012] In some embodiments, the first chamber, the second chamber, and the blowing needle are coaxially arranged.

[0013] The present application also provides a blowing demolding structure, which is characterized in that it includes a template, and the above-mentioned blowing assembly is arranged on the template. The syringe of the blowing assembly is fixedly arranged on the template, and an air inlet channel connected to the air inlet is arranged on the template.

[0014] In some embodiments, the syringe is vertically arranged, the air inlet channel is perpendicular to the syringe, and the air outlet is arranged on the molding surface of the template. Since the air inlet channel is perpendicular to the syringe, the interface of the air inlet channel can be arranged on the side of the template, so that the air circuit layout is more reasonable.

[0015] The present application also provides a PCM hot pressing mold, which is characterized in that it includes an upper mold and a lower mold. The upper mold and the lower mold are respectively provided with an upper blowing assembly and a lower blowing assembly. Both the upper blowing assembly and the lower blowing assembly adopt the structure of the above-mentioned blowing assembly. The blowing port of the upper blowing assembly is arranged on the lower molding surface of the upper mold, and the blowing port of the lower blowing assembly is arranged on the upper molding surface of the lower mold. The upper mold and the lower mold are respectively provided with air inlet channels connected to the air inlets of the upper blowing assembly and the lower blowing assembly.

[0016] In some embodiments, during mold demolding, the upper blowing assembly blows air first, then the upper mold is opened, and finally the lower blowing assembly blows air.

[0017] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0018] The present application discloses a blowing assembly. When the mold is demolded, the blowing needle retracts into the second chamber. At this time, the blowing port blows outward, which can avoid vacuum adsorption of the mold, thereby improving demolding difficulties and reducing product scrapping. In addition, the present application uses an independent driving component to drive the blowing needle to perform telescopic movement, which is not easy to get the needle stuck and the movement is more stable. In addition, the present application controls the start and stop of the blowing by telescoping the blowing needle relative to the syringe, which can reduce the external colloid from being brought into the blowing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the working process of the embodiment of the present application during molding;

[0020] Figure 2 This is a schematic diagram of the working process of the embodiment of the present application during upper mold blowing;

[0021] Figure 3 This is a schematic diagram of the working process of the embodiment of the present application when blowing air in the lower mold;

[0022] Figure 4 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 5 for Figure 3 A magnified schematic diagram of point B in the middle.

[0024] Explanation of reference numerals: 1. Upper mold; 11. Lower molding surface; 2. Lower mold; 21. Upper molding surface; 3. Upper blowing assembly; 4. Lower blowing assembly; 5. Air inlet channel; 6. Syringe; 61. First chamber; 62. Second chamber; 63. Blowing port; 7. Blowing needle; 8. Driving component; 9. Seal; 10. Product. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The terms used in the implementation method of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0026] See also Figures 1 to 5 The embodiment of the present application provides a PCM hot pressing forming mold, including an upper mold 1 and a lower mold 2, the upper mold 1 and the lower mold 2 can be opened and closed with each other, and the upper mold 1 and the lower mold 2 are respectively provided with an upper blowing component 3 and a lower blowing component 4;

[0027] The upper blowing assembly 3 and the lower blowing assembly 4 both include a syringe 6 and a blowing needle 7 movably arranged in the syringe 6. The inner cavity of the syringe 6 includes a first chamber 61 and a second chamber 62 which are connected to each other. The first chamber 61 has a blowing port 63 which is open to the outside, and the second chamber 62 is provided with an air inlet. The blowing needle 7 extends into the first chamber 61, and the blowing needle 7 is sealedly connected to the first chamber 61, thereby closing the blowing port 63. The blowing needle 7 retracts into the second chamber 62, and the first chamber 61 is connected to the second chamber 62, so that the air outlet can blow air outward to assist demoulding. The blowing assembly also includes a driving component 8 for driving the blowing needle 7 to extend into the first chamber 61 or retract into the second chamber 62.

[0028] The blowing port 63 of the upper blowing component 3 is arranged on the lower molding surface 11 of the upper mold 1, and the blowing port 63 of the lower blowing component 4 is arranged on the upper molding surface 21 of the lower mold 2. The upper mold 1 and the lower mold 2 are respectively provided with an air inlet channel 5 connected with the air inlet of the upper blowing component 3 and the lower blowing component 4, and the air inlet channel 5 is externally connected to the air supply pipeline. The syringe 6 can be a structure integrated with the template or an independently installed component.

[0029] The above-mentioned PCM hot pressing molding mold of the present application, when the mold is demolded, the blowing needle 7 retracts into the second chamber 62, and the blowing port 63 blows outward at this time, which can avoid vacuum adsorption of the mold, thereby improving the difficulty of demolding and reducing the problem of product 10 being scrapped. In addition, the present application adopts an independent driving component 8 to drive the blowing needle 7 to perform telescopic movement, so that the needle is not easy to get stuck and the movement is more stable. In addition, the present application controls the start and stop of the blowing by telescoping the blowing needle 7 relative to the syringe 6, which can reduce the external colloid brought into the blowing component.

[0030] In some embodiments, the inner diameter of the second chamber 62 is larger than the inner diameter of the first chamber 61 , and the outer diameter of the blowing needle 7 is smaller than the inner diameter of the first chamber 61 .

[0031] In some embodiments, the driving component 8 is a cylinder connected to the blowing needle 7, and the cylinder is fixedly mounted on the template of the upper mold 1 or the lower mold 2. The cylinder is used because it can provide greater force and can be made smaller. The internal pressure of the PCM mold during molding is relatively high, usually reaching more than 10map. If the force provided by the cylinder is used, it may not meet the requirements. If a motor is used to drive the transmission mechanism to realize the movement of the blowing needle 7, it will take up more space.

[0032] In some embodiments, a sealing member 9 is fixedly disposed on the blowing needle 7, and when the blowing needle 7 extends into the first chamber 61, the sealing member 9 seals between the blowing needle 7 and the first chamber 61. The sealing member 9 is a sealing ring or the like.

[0033] In some embodiments, the gap L between the first chamber 62 and the blowing needle 7 satisfies 0 < L ≤ 0.01 mm. The purpose of this is that assuming the colloid outside the mold enters the needle sleeve and the gap between the first chamber 61 and the blowing needle 7 is very small, the colloid can only form a very thin film between the first chamber 61 and the blowing needle 7. When blowing air outwards, the air will automatically blow out this film, avoiding the problem of glue jamming. The reason why L is greater than 0 is that the mold will thermally expand, and leaving a certain gap between the first chamber 62 and the blowing needle 7 can prevent the blowing needle from interfering.

[0034] In some embodiments, the first chamber 61, the second chamber 62 and the blowing needle 7 are coaxially arranged.

[0035] In some embodiments, the syringe barrel 6 is vertically arranged, and the air inlet channel 5 is perpendicular to the syringe barrel 6. Since the air inlet channel 5 is perpendicular to the syringe barrel 6, the interface of the air inlet channel 5 can be arranged on the side of the template, making the air circuit layout more reasonable.

[0036] In some embodiments, when the mold is demolded, the above blowing assembly 3 blows air first, then the upper mold 1 is opened, and finally the lower blowing assembly 4 blows air again for operation.

[0037] The working process and usage method of the above-described PCM hot pressing mold in the above embodiment are briefly described below:

[0038] Refer to Figure 1 , which shows the state of the mold during molding. At this time, both the upper blowing assembly 3 and the lower blowing assembly 4 are in the closed state. After the product 10 is molded, demolding is carried out. Refer to Figure 2 , at this time, the blowing needle 7 of the upper blowing assembly 3 retracts into the second chamber 62 under the action of the oil cylinder, and the gas sequentially enters the second chamber 62, the first chamber 61 and the blowing port 63 through the air inlet channel 5 to blow air outwards (the movement process of the blowing needle 7 can be referred to Figure 4 and Figure 5 ), preventing the product 10 from sticking to the upper mold 1, and the lower blowing assembly 4 remains in the closed state. Refer to Figure 3 , then the upper mold 1 is slowly opened. After the upper mold 1 rises in place, the lower blowing assembly 4 also starts to blow air (the movement process of the blowing needle 7 can be referred to Figure 4 and Figure 5 ), and finally the product 10 is taken out.

[0039] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] The terms "first," "second," "third," "fourth," etc., if any, are used to distinguish between similar objects and not necessarily to describe a particular sequence or order.

[0041] In the description of the embodiments of the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A blowing assembly, characterized in that: It comprises a syringe and a blowing needle movably arranged in the syringe, wherein the inner cavity of the syringe comprises a first chamber and a second chamber which are connected to each other, the first chamber has a blowing port open to the outside, and the second chamber is provided with an air inlet; The blowing needle extends into the first chamber, and the blowing needle is sealedly connected to the first chamber, thereby closing the blowing port; the blowing needle retracts into the second chamber, and the first chamber and the second chamber are connected, so that the air outlet can blow air outward to assist demoulding; the blowing assembly also includes a driving component for driving the blowing needle to extend into the first chamber or retract into the second chamber.

2. The blowing assembly according to claim 1, characterized in that: The inner diameter of the second chamber is larger than the inner diameter of the first chamber, and the outer diameter of the blowing needle is smaller than the inner diameter of the first chamber.

3. The blowing assembly according to claim 1, characterized in that: The driving component is an oil cylinder connected to the blowing needle.

4. The blowing assembly according to claim 1, characterized in that: A sealing member is fixedly arranged on the blowing needle. When the blowing needle extends into the first chamber, the sealing member seals between the blowing needle and the first chamber.

5. The blowing assembly according to claim 2, characterized in that: The gap L between the first chamber and the blowing needle: 0 <L≤0.01mm。 6. The blowing assembly according to claim 1, characterized in that: The first chamber, the second chamber and the blowing needle are coaxially arranged.

7. A blowing demoulding structure, characterized in that: It comprises a template, on which the blowing assembly according to any one of claims 1 to 6 is arranged, the syringe of the blowing assembly is fixedly arranged on the template, and the template is provided with an air inlet channel connected to the air inlet.

8. The air blowing demoulding structure according to claim 7, characterized in that: The syringe is vertically arranged, the air inlet channel is arranged perpendicular to the syringe, and the air outlet is arranged on the molding surface of the template.

9. A PCM hot pressing mold, characterized in that: It includes an upper mold and a lower mold, and the upper mold and the lower mold are respectively provided with an upper blowing assembly and a lower blowing assembly, and the upper blowing assembly and the lower blowing assembly both adopt the structure of a blowing assembly as described in any one of claims 1-6, the blowing port of the upper blowing assembly is arranged on the lower molding surface of the upper mold, and the blowing port of the lower blowing assembly is arranged on the upper molding surface of the lower mold, and the upper mold and the lower mold are respectively provided with air inlet channels connected with the air inlets of the upper blowing assembly and the lower blowing assembly.

10. The PCM hot pressing mold according to claim 9, characterized in that: When the mold is demoulded, the upper blowing component blows air first, then the upper mold is opened, and finally the lower blowing component blows air again.

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