Die structure for improving burrs of PPS (polyphenylene sulfide) bumping hole

Abstract

The utility model discloses a mold structure for improving burrs of a PPS (polyphenylene sulfite) bumping hole, relates to the technical field of production of electronic component injection products, and solves the problems that a cylindrical pin on a mold is easy to expand due to high-temperature thermal expansion to damage the mold and influence the quality of the product in the injection production of the product. The sleeve is internally provided with a guide channel, and a limiting cavity is formed between the guide channel and the sliding block; the cylindrical part is movably arranged in the guide channel, the front end of the cylindrical part extends out of the guide channel, and a limiting part matched with the limiting cavity is arranged at the rear end of the cylindrical part; and a spring. The die structure can prevent the cylinder part from being damaged due to thermal expansion and lengthening, a gap is formed between the limiting part at the rear end of the cylinder part and the sliding block, the cylinder part has a retreating space, meanwhile, due to the effect of the spring, the cylinder part of the cylinder part penetrates through the small hole in a colliding mode, and no gap exists between the front end face of the cylinder part and the die part. And burrs of the round holes are prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component injection moulded product production technical field, especially a mould structure that improves PPS punch hole burr. BACKGROUND

[0002] Polyphenylene sulfide (PPS) is a new type of high performance thermoplastic resin, has many excellent physical and chemical properties. PPS material is widely used in electronic components in part injection processing. At present, part of the product in injection molding, the mould structure adopts directly with cylinder pin punch, cylinder parts are installed on the slider, and the slider is installed on the shovel, the slider and the shovel can be obliquely slid along the inclined guide column to make the cylinder pin of the front end of the cylinder part and the small hole on the product punch, thereby forming a small hole on the product. But because the temperature of PPS material is very high in injection molding, so in the production process, the cylinder pin is easy to expand due to high temperature, which causes the size error of the cylinder part and other mould parts, and the size error of the slider and other parts after the cylinder part expands and damages the parts, the gap appears at the front end of the cylinder part, which cannot punch the product, resulting in burr of the small hole, affecting the quality of the product. SUMMARY

[0003] The utility model discloses a kind of mould structures for improving PPS punch hole burr, solve the problem that cylinder pin on mould is easy to expand due to high temperature and lengthen and damage mould in injection molding production of product, and affect the quality of product.

[0004] The technical scheme of the utility model for achieving the above-mentioned purpose is a kind of mould structures for improving PPS punch hole burr, comprising:

[0005] Slider;

[0006] Sleeve, the rear end of the sleeve is installed on the slider, the sleeve has a guide channel inside, the guide channel and the slider form a limiting cavity, the diameter of the limiting cavity is greater than the diameter of the guide channel;

[0007] Cylinder part, the cylinder part is movably arranged in the guide channel, and the front end of the cylinder part extends from the guide channel, the rear end of the cylinder part is provided with a limiting part matched with the limiting cavity, and the limiting part is movably arranged in the limiting cavity;

[0008] Spring, the spring is sleeved on the sleeve or the cylinder part, under the action of the spring, the front end face of the cylinder part can be in contact with the product to be formed at any time.

[0009] Preferably, the cylindrical part includes a main body, a cylindrical part and the limiting part, the shape of the guide channel is adapted to the outer shape of the main body, the cylindrical part and the limiting part are respectively arranged at the front and rear ends of the main body, the front end of the guide channel has an auxiliary channel adapted to the cylindrical part, and the front end of the cylindrical part extends out of the auxiliary channel.

[0010] Preferably, a stopper is provided on the main body, and the spring can apply a top pressure to the stopper.

[0011] Preferably, the spring is sleeved on the outside of the sleeve, and the sleeve is provided with an avoidance hole connected to the guide channel. At least one end of the block extends out of the avoidance hole and can move along the axial direction of the sleeve. The outer side of the sleeve is convex to form a blocking portion, and the two ends of the spring are respectively in contact with the block and the blocking portion, and can apply a top pressure to the block.

[0012] Preferably, the spring is located on the inner side of the sleeve and is sleeved on the main body. The guide channel has an accommodating cavity for accommodating the block and the spring. The two ends of the spring are respectively in contact with the block and the inner wall of the accommodating cavity and can apply a top pressure to the block.

[0013] Preferably, the rear end of the cylindrical part protrudes outward to form the limiting portion.

[0014] Preferably, one side of the slider has a card slot, and the rear end of the sleeve is provided with a card connection portion adapted to the card slot, and the card connection portion is card-connected with the card slot.

[0015] Preferably, a guide hole is provided on the slider, and the guide hole extends obliquely downward from the upper surface of the slider to the lower surface of the slider, and an oblique guide column is slidably connected in the guide hole.

[0016] Compared with the prior art, the beneficial effects are:

[0017] The mold structure of the present invention can prevent the cylindrical part from expanding due to heat and damaging the mold part. Under the reaction force of the spring, the spring will apply a pressing force to the cylindrical part, and the cylindrical part will slide forward along the guide channel inside the sleeve to compensate for the dimensional errors caused by the slider and other parts, and prevent the cylindrical part at the front end of the cylindrical part from piercing the small hole on the product. If the cylindrical part expands due to heat during a long production process, a gap will form between the limit part at the rear end of the cylindrical part and the slider, allowing the cylindrical part to retreat. At the same time, due to the action of the spring, the cylindrical part will penetrate the small hole on the product, and there will be no gap between the front end surface of the cylindrical part and the mold part, preventing burrs from appearing on the circular hole on the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the mold structure colliding with the small hole on the product;

[0019] Figure 2 1 is a schematic diagram of the overall structure of the mold structure of Example 1;

[0020] Figure 3 1 is a schematic diagram of the bottom structure of the mold structure of Example 1;

[0021] Figure 4 1 is a schematic structural diagram of the sleeve in the mold structure of Example 1;

[0022] Figure 5 is a schematic cross-sectional structural diagram of the sleeve in the mold structure of Example 1;

[0023] Figure 6 Schematic diagram of the cylindrical part structure in the mold structure of Example 1;

[0024] Figure 7 This is a schematic cross-sectional view of the mold structure in Example 1 when the mold structure penetrates the product;

[0025] Figure 8 It is a schematic cross-sectional view of the mold structure in Example 2.

[0026] In the figure, 1. slider; 101. slot; 2. sleeve; 21. blocking part; 22. clamping part; 201. guide channel; 202. limiting cavity; 203. auxiliary channel; 204. avoidance hole; 205. accommodating cavity; 3. cylindrical part; 31. main body; 32. cylindrical part; 33. limiting part; 4. spring; 5. inclined guide column; 6. shovel; 7. block; 8. product; 9. mold part. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 2As shown, a preferred embodiment of the present invention proposes a mold structure for improving the burrs caused by perforation of PPS. The mold structure mainly includes a scraper 6, a slider 1, an inclined guide post 5, a sleeve 2, a cylindrical part 3, a spring 4, and other components. The slider 1 is fixedly mounted on the bottom of the scraper 6. An obliquely extending guide hole is formed on the slider 1 and the scraper 6. The inclined guide post 5 is located in the guide hole. The scraper 6 and the slider 1 can slide obliquely upward along the inclined guide post 5. The sleeve 2 is mounted on the front end of the slider 1. The cylindrical part 3 is movably mounted in the sleeve 2. The front end of the cylinder extends out of the sleeve 2. The spring 4 can apply a pressing force to the cylindrical part 3, so that the front end of the cylindrical part 3 always penetrates the product 8. When thermal expansion occurs, the cylindrical part 3 can appropriately retreat to eliminate the dimensional difference caused by expansion.

[0030] like Figure 3 、 Figure 4 As shown, a slot 101 is provided on one side of the slider 1 , and a snap-fitting portion 22 adapted to the slot is provided at the rear end of the sleeve 2 . The snap-fitting portion 22 is snap-fitted to the slot 101 , so that the sleeve 2 can be installed on the slider 1 .

[0031] like Figure 5 、 Figure 6 As shown, the shape of the sleeve 2 is roughly adapted to the shape of the cylindrical part 3. A guide channel 201 is formed inside the sleeve 2. The cylindrical part 3 is located inside the sleeve 2 and can extend and slide in the guide channel 201. The front end of the cylindrical part 3 extends out from the guide channel 201.

[0032] The cylindrical component 3 is composed of a main body 31, a cylindrical portion 32, and a stopper 33. The cylindrical portion 32 and the stopper 33 are located at the front and rear ends of the main body 31, respectively. The cylindrical portion 32 will penetrate and contact the product 8. The shape of the guide channel 201 matches the shape of the main body 31. The front end of the sleeve 2 also has an auxiliary channel 203 connected to the guide channel 201. The shape of this auxiliary channel 203 matches the shape of the cylindrical portion 32, allowing the cylindrical portion 32 to slide along the auxiliary channel 203.

[0033] refer to Figure 4-Figure 7 The rear end of the sleeve 2 is relatively thick and abuts against the slider 1. A limiting cavity 202 is formed inside the rear end of the sleeve 2. The limiting cavity 202 is connected to the guide channel 201. The limiting portion 33 of the cylindrical part 3 is located in the limiting cavity 202. The diameter of the limiting portion 33 is larger than the diameter of the guide channel 201. Therefore, the limiting portion 33 can only slide in the limiting cavity 202. At the same time, the limiting cavity 202 can also limit the limiting portion 33.

[0034] In this embodiment, a stopper 7 is mounted on the main body 31 of the cylindrical component 3. Both ends of the stopper 7 extend through the sleeve 2 to a certain length. To this end, two strip-shaped escape holes 204 are provided in the sleeve 2. Once the stopper 7 extends through these holes, it can move axially relative to the sleeve 2 along with the cylindrical component 3. These escape holes 204 limit the movement of the stopper 7.

[0035] like Figure 4 、 Figure 7 As shown, a blocking portion 21 is formed on the outer side of the sleeve 2 and is protruded outward. A spring 4 is sleeved on the outer side of the sleeve 2, and the two ends of the spring 4 respectively abut against the block 7 and the blocking portion 21. The spring 4 applies a certain amount of pressure to the block 7, so that the cylindrical portion 32 of the cylindrical part 3 always penetrates the small hole in the product 8. When the cylindrical part 3 expands thermally, it can slide backward along the sleeve 2, retreating partially. At the same time, under the action of the spring 4, the cylindrical portion 32 of the cylindrical part 3 always penetrates the small hole in the product 8. In this way, the cylindrical part 3 will not damage the mold structure due to thermal expansion, and will not cause burrs on the small holes in the product 8.

[0036] Stopper 7 can also stretch out from sleeve 2 at one end, does not affect spring 4 and applies top pressure to stopper 7. Just the two ends of stopper 7 stretch out from sleeve 2 simultaneously, and the stress of stopper 7 is more even.

[0037] like Figure 1 、 Figure 7 As shown, during the production and processing of product 8, under the reaction force of spring 4, cylindrical part 3 is blocked by block 7, and spring 4 applies a top pressure to block 7, forcing cylindrical part 3 to move forward 0.05mm, compensating for the dimensional error between slider 1 and other mold parts 9, and preventing the cylindrical portion 32 at the front end of cylindrical part 3 from penetrating the small hole on product 8. If, during a long production process, cylindrical part 3 expands due to heat, causing cylindrical portion 32 to lengthen, there will be a 0.5mm gap between the limiting portion 33 at the rear end of cylindrical part 3 and slider 1, allowing cylindrical part 3 to have room to retreat. At the same time, due to the action of spring 4, the cylindrical portion 32 of cylindrical part 3 penetrates the small hole and contacts mold part 9, and there will be no gap between the front end surface of cylindrical portion 32 and product 8, preventing burrs from appearing on the circular hole.

[0038] Example 2

[0039] like Figure 8As shown, in this embodiment, a receiving cavity 205 is provided within the guide channel 201, dividing the guide channel 201 into two sections. The stopper 7 and spring 4 are positioned within the receiving cavity 205, with the stopper 7 not extending beyond the sleeve 2. The spring 4 is sleeved onto the main body 31 of the cylindrical component 3. The ends of the spring 4 respectively abut the stopper 7 and the inner wall of the receiving cavity 205, exerting a pressing force on the stopper 7. This ensures that the cylindrical portion 32 at the front end of the cylindrical component 3 consistently penetrates the small hole in the product 8 and contacts the mold component 9.

[0040] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. A mold structure for improving PPS burrs, characterized in that: include: Slider(1); A sleeve (2), wherein the rear end of the sleeve (2) is mounted on the slider (1), a guide channel (201) is provided in the sleeve (2), a limiting cavity (202) is formed between the guide channel (201) and the slider (1), and the diameter of the limiting cavity (202) is larger than the diameter of the guide channel (201); A cylindrical part (3), the cylindrical part (3) is movably arranged in the guide channel (201), and the front end of the cylindrical part (3) extends from the guide channel (201), and the rear end of the cylindrical part (3) is provided with a limiting portion (33) that cooperates with the limiting cavity (202), and the limiting portion (33) is movably arranged in the limiting cavity (202); A spring (4) is sleeved on the sleeve (2) or the cylindrical part (3). Under the action of the spring (4), the front end surface of the cylindrical part (3) can always be in contact with the product to be formed.

2. A mold structure for improving PPS burrs according to claim 1, characterized in that: The cylindrical part (3) comprises a main body (31), a cylindrical part (32) and a limiting part (33); the shape of the guide channel (201) is adapted to the outer shape of the main body (31); the cylindrical part (32) and the limiting part (33) are respectively arranged at the front and rear ends of the main body (31); the front end of the guide channel (201) has an auxiliary channel (203) adapted to the cylindrical part (32); and the front end of the cylindrical part (32) extends out of the auxiliary channel (203).

3. A mold structure for improving PPS burrs according to claim 2, characterized in that: A stopper (7) is provided on the main body (31), and the spring (4) can apply a top pressure to the stopper (7).

4. A mold structure for improving PPS burrs according to claim 3, characterized in that: The spring (4) is sleeved on the outside of the sleeve (2); a relief hole (204) communicating with the guide channel (201) is provided on the sleeve (2); at least one end of the stopper (7) extends out of the relief hole (204) and is movable along the axial direction of the sleeve (2); a blocking portion (21) is formed on the outer protrusion of the sleeve (2); the two ends of the spring (4) are respectively in contact with the stopper (7) and the blocking portion (21), and are capable of applying a top pressure to the stopper (7).

5. A mold structure for improving PPS burrs according to claim 3, characterized in that: The spring (4) is located on the inner side of the sleeve (2) and is sleeved on the main body (31). The guide channel (201) has an accommodating cavity (205) for accommodating the stopper (7) and the spring (4). The two ends of the spring (4) are respectively in contact with the stopper (7) and the inner wall of the accommodating cavity (205), and can apply a top pressure to the stopper (7).

6. A mold structure for improving PPS burrs according to claim 1, characterized in that: The rear end of the cylindrical part (3) protrudes outward to form the limiting portion (33).

7. A mold structure for improving PPS burrs according to claim 1, characterized in that: One side of the slider (1) has a clamping groove (101), and the rear end of the sleeve (2) is provided with a clamping portion (22) adapted to the clamping groove (101), and the clamping portion (22) is clamped with the clamping groove (101).

8. A mold structure for improving PPS burrs according to claim 1, characterized in that: The slider (1) is provided with a guide hole, which extends obliquely downward from the upper surface of the slider (1) to the lower surface of the slider (1), and an oblique guide column (5) is slidably connected in the guide hole.

Images