A heating and pressing device between plastic parts

Abstract

The present invention discloses a device for heating and pressing plastic parts. The key points of the technical solution are as follows: it comprises a base, a support seat is fixed on the top of the base, a heating mechanism is vertically slidably arranged on the top of the base, a pressing mechanism for driving the heating mechanism to vertically rise and fall is arranged on the support seat, the heating mechanism comprises a supporting seat and two hot melt heads arranged at the bottom of the supporting seat, a workpiece fixing seat for positioning a first workpiece is fixed on the top of the base, and the two hot melt heads are driven by the pressing mechanism to hot-melt and fix a second workpiece assembled on the first workpiece to the first workpiece. The device for heating and pressing plastic parts has the advantages of convenience, speed and high production efficiency when used.

Description

Technical Field

[0001] The invention relates to the technical field of heat pressing, and in particular to a device for heating and pressing plastic parts. Background Art

[0002] After the product is injection molded, it is necessary to hot-melt assemble the plastic parts with other plastic parts or with other parts. The principle of hot melting is that there are local protrusions on the plastic parts called hot melt pins, and there are corresponding holes on the parts to be assembled. The hot melt pins pass through the holes and are melted and reshaped by heating to fasten the other parts. The current method is mainly to manually melt the hot melt pins with electric soldering irons to fasten the parts. Workers are prone to accidents of being burned by electric soldering irons when they use electric soldering irons for a long time. Products and parts assembled by this method have large product quantities due to different manual techniques, and some products cannot meet the assembly requirements, resulting in high scrap rates and low manual processing efficiency.

[0003] The existing Chinese patent with publication number CN111421834B discloses a hot pressing device, including: a positioning mechanism, a heating mechanism, and a pressing mechanism. The positioning mechanism includes: a base and a carrier; the heating mechanism includes: a slide seat, a first driver, and a heat-conducting block; the heat-conducting block is located on the outside of the carrier; the heat-conducting block is provided with a heater; the pressing mechanism includes: a bracket, a fixing seat, a second driver, a pressing claw, and a third driver. The above-mentioned hot pressing device uses a positioning mechanism to position the metal part, and then presses the plastic part and the metal part together through the pressing mechanism, and heats the metal part through the heating mechanism to reach a temperature at which the glue solidifies quickly, so that the glue between the plastic part and the metal part solidifies under stable pressure and temperature, realizing automated hot pressing bonding, making the bonding between the metal part and the plastic part more efficient and more controllable, ensuring that the effect of glue curing meets the requirements, and improving the qualified rate of the product.

[0004] Another example is the Chinese patent with the existing publication number CN109353015B, which discloses a plastic hot melt machine, which includes: a chassis, a support platform installed on the chassis and a hot pressing device. The hot pressing device includes an adjustment mechanism, a support arm installed on the adjustment mechanism, a driver installed on the support arm, and a hot pressing component connected to the driver, and the driver drives the hot pressing component to move in the direction of approaching or moving away from the support platform. The adjustment mechanism includes two stacked angle adjustment components with different adjustment directions. The angle adjustment component includes a support seat, a sliding pendulum seat installed on the support seat and connected to each other, and an angle adjustment rod. When the angle adjustment rod rotates, it drives the sliding pendulum seat to swing for angle adjustment. Since two angle adjustment components with different adjustment angles are provided, the angle can be adjusted according to different workpieces in actual use, and the versatility is strong, so that the hot pressing component and the workpiece have high fitting accuracy and good hot melt processing quality.

[0005] The above patents and current technologies all have some advantages, but also have some disadvantages, such as: inconvenient operation during generation and low generation rate. Summary of the invention

[0006] In view of the problems mentioned in the background technology, an object of the present invention is to provide a heating and pressing device between plastic parts to solve the problems mentioned in the background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A heating and pressing device between plastic parts comprises a base, a support seat is fixed above the base, a heating mechanism is vertically slidably arranged above the base, a pressing mechanism for driving the heating mechanism to vertically rise and fall is arranged on the support seat, the heating mechanism comprises a supporting seat and two hot melt heads arranged at the bottom of the supporting seat, a workpiece fixing seat for positioning a first workpiece is fixed above the base, and the two hot melt heads are driven by the pressing mechanism to hot-melt and fix a second workpiece assembled on the first workpiece to the first workpiece.

[0009] By adopting the above technical scheme, the heating and pressing device between plastic parts has the advantages of convenience, speed and high production efficiency when used; when applying this device, the first workpiece can be positioned and placed in the workpiece fixing seat, and the second workpiece can be inserted into the assembly groove on the first workpiece. After that, the pressing mechanism can be used to drive the heating mechanism downward, so that the two hot melt heads at the bottom of the supporting seat are in contact with the second workpiece, and the second workpiece is hot-melted and pressed and fixed with the first workpiece. The operation is reliable and stable, the production efficiency is improved, the operator is replaced, and the product quality is improved.

[0010] Preferably, a sliding seat is fixed above the supporting seat, and a heat insulating pad is provided between the sliding seat and the supporting seat.

[0011] By adopting the above technical solution, the sliding seat can be used to maintain the stability of the vertical sliding of the supporting seat, and the provision of the thermal insulation pad can achieve a thermal insulation effect.

[0012] Preferably, a plurality of guide rods are symmetrically fixed above the base, and a plurality of guide sleeves cooperating with the guide rods are fixed on the sliding seat.

[0013] By adopting the above technical solution, the cooperation of the guide rod and the guide sleeve can improve the sliding stability of the sliding seat and improve the downward stability of hot pressing.

[0014] Preferably, a groove is provided in the supporting seat, a first spring is arranged in the groove, and the first spring is connected between the hot melt head and the bottom of the groove.

[0015] By adopting the above technical solution, the first spring in the groove enables the hot melt head to have a certain elastic restoring force when pressed down.

[0016] Preferably, the outer sleeve of the hot melt head is provided with a pressing sleeve, the pressing sleeve is vertically slidably connected to the outside of the hot melt head, the pressing sleeve is connected to the supporting seat through a connecting rod mechanism, the end of the pressing sleeve is threadedly connected with a cutting head, and an annular scraper is fixed in the pressing sleeve.

[0017] By adopting the above technical scheme, a pressing sleeve is firstly sleeved on the outside of the hot melt head, and the heat of the hot melt head can be used to heat the pressing sleeve to facilitate subsequent thermal cutting. When the hot melt head descends and contacts the surface of the second workpiece, the pressing sleeve arranged on the outside of the hot melt head can descend with the hot melt head. When the surface of the second workpiece melts into a protruding plastic hot melt area and is fixed, the cutting head at the end of the pressing sleeve can flatten the hot melt area and cut off the edge to facilitate subsequent deburring operations. When the hot melt head moves upward, the pressing sleeve will move from the bottom of the pressing sleeve to the top under the action of the connecting rod mechanism. In this process, the annular scraper in the pressing sleeve can scrape and pull the surface of the hot melt head to achieve the purpose of cleaning the hot melt head. Since the cutting head is threadedly connected to the end of the pressing sleeve, the cutting head can be easily disassembled. After the cutting head is disassembled, the burrs cleaned by the annular scraper can be cleaned out from the cavity of the pressing sleeve.

[0018] Preferably, the connecting rod mechanism includes a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod, one end of the first connecting rod is fixed to the pressing sleeve, one end of the second connecting rod is hinged to the end of the first connecting rod, the other end of the second connecting rod is hinged to the third connecting rod, the middle part of the third connecting rod is hinged to the supporting seat, the other end of the third connecting rod is hinged to the fourth connecting rod, and the fourth connecting rod is hinged to the hot melt head at the end facing away from the third connecting rod.

[0019] By adopting the above technical solution, when the hot melt head descends and contacts the surface of the second workpiece for hot melting, the first spring will be compressed, and the third connecting rod in the connecting rod mechanism will swing, thereby driving the fourth connecting rod and the first connecting rod to rotate, driving the pressing sleeve downward, and the cutting head at the bottom of the pressing sleeve can incise the protruding area of ​​the forming part after hot melting, so as to facilitate the subsequent cleaning of burrs; when the hot melt head moves upward, the first spring will release the elastic force, and the second connecting rod, the third connecting rod and the fourth connecting rod in the connecting rod mechanism will move again, so that the pressing sleeve slides relative to the hot melt head, so that the annular scraper inside the pressing sleeve cleans the surface of the hot melt head.

[0020] Preferably, the inner side of the annular scraper has a scraping edge.

[0021] By adopting the above technical solution, the scraping blade edge can be used to effectively scrape the surface of the hot melt head.

[0022] In summary, the present invention mainly has the following beneficial effects:

[0023] The heating and pressing device between plastic parts has the advantages of being convenient, fast and highly efficient when used. When the device is applied, the first workpiece can be positioned and placed in the workpiece fixing seat, and the second workpiece can be inserted into the assembly groove on the first workpiece. After that, the pressing mechanism can be used to drive the heating mechanism downward, so that the two hot melt heads at the bottom of the supporting seat can contact the second workpiece, and the second workpiece can be hot-melted and pressed and fixed with the first workpiece. The operation is reliable and stable, the production efficiency is improved, the operator can be replaced, and the product quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is one of the structural schematic diagrams of the present invention;

[0025] Figure 2 The present invention Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is the second structural schematic diagram of the present invention;

[0027] Figure 4 It is a structural cross-sectional view of the present invention;

[0028] Figure 5 The present invention Figure 4 Enlarged view of point B in the middle.

[0029] Figure numerals: 1. base; 2. support seat; 3. heating mechanism; 4. pressing mechanism; 5. supporting seat; 6. hot melt head; 7. first workpiece; 8. workpiece fixing seat; 9. second workpiece; 10. sliding seat; 13. thermal insulation pad; 14. guide rod; 15. guide sleeve; 16. groove; 17. first spring; 18. pressing sleeve; 19. cutting head; 20. annular scraper; 21. first connecting rod; 22. second connecting rod; 23. third connecting rod; 24. fourth connecting rod. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Example 1

[0032] refer to Figure 1-5, a heating and pressing device between plastic parts, comprising a base 1, a support seat 2 is fixed above the base 1, a heating mechanism 3 is vertically slidably arranged above the base 1, a pressing mechanism 4 is arranged on the support seat 2 to drive the heating mechanism 3 to rise and fall vertically, the heating mechanism 3 comprises a supporting seat 5 and two hot melt heads 6 arranged at the bottom of the supporting seat 5, a workpiece fixing seat 8 for positioning a first workpiece 7 is fixed above the base 1, and the two hot melt heads 6 are driven by the pressing mechanism 4 to hot melt and fix the second workpiece 9 assembled on the first workpiece 7 to the first workpiece 7. The heating and pressing device between plastic parts has the advantages of convenience, speed and high production efficiency when used; when the device is used, the first workpiece 7 can be positioned and placed in the workpiece fixing seat 8, and the second workpiece 9 can be inserted into the assembly groove on the first workpiece 7, and then the pressing mechanism 4 can be used to drive the heating mechanism 3 downward, so that the two hot melt heads 6 at the bottom of the supporting seat 5 are in contact with the second workpiece 9, and the second workpiece 9 is hot-melted and pressed and fixed with the first workpiece 7, and the work is reliable and stable, which improves the production efficiency, replaces the operator, and improves the product quality.

[0033] refer to Figure 1-5 A sliding seat 10 is fixed above the supporting seat 5, and a heat-insulating pad 13 is arranged between the sliding seat 10 and the supporting seat 5. The sliding seat 10 can maintain the stability of the vertical sliding of the supporting seat 5, and the arrangement of the heat-insulating pad 13 can play a heat-insulating effect. A plurality of guide rods 14 are symmetrically fixed above the base 1, and a plurality of guide sleeves 15 cooperating with the guide rods 14 are fixed on the sliding seat 10. The cooperation of the guide rods 14 and the guide sleeves 15 can improve the sliding stability of the sliding seat 10 and improve the downward stability of the hot pressing.

[0034] refer to Figure 1-5, wherein a groove 16 is provided in the support seat 5, a first spring 17 is provided in the groove 16, the first spring 17 is connected between the hot melt head 6 and the bottom of the groove 16, and the first spring 17 in the groove 16 enables the hot melt head 6 to have a certain elastic restoring force when pressed down; wherein a pressing sleeve 18 is provided on the outside of the hot melt head 6, and the pressing sleeve 18 is vertically slidably connected to the outside of the hot melt head 6, and the pressing sleeve 18 is connected to the support seat 5 through a connecting rod mechanism, and a cutting head 19 is threadedly connected to the end of the pressing sleeve 18, and an annular scraper 20 is fixed in the pressing sleeve 18. When the hot melt head 6 moves downward and contacts the surface of the second workpiece 9, the pressing sleeve 18 arranged on the outside of the hot melt head 6 can move with the hot melt head 6 moving downward. When the surface of the second workpiece 9 melts into a protruding plastic hot-melt area and is fixed, the cutting head 19 at the end of the pressing sleeve 18 can flatten the hot-melt area and cut off the edge, which is convenient for subsequent deburring operations. When the hot-melt head 6 moves upward, the pressing sleeve 18 will move from the bottom of the pressing sleeve 18 to the top under the action of the connecting rod mechanism. In this process, the annular scraper 20 in the pressing sleeve 18 can scrape and pull the surface of the hot-melt head 6 to achieve the purpose of cleaning the hot-melt head 6. Since the cutting head 19 is threadedly connected to the end of the pressing sleeve 18, the cutting head 19 can be easily disassembled. After the cutting head 19 is disassembled, the burrs cleaned by the annular scraper 20 can be cleaned out from the cavity of the pressing sleeve 18.

[0035] refer to Figure 1-5 , wherein the connecting rod mechanism includes a first connecting rod 21, a second connecting rod 22, a third connecting rod 23, and a fourth connecting rod 24, one end of the first connecting rod 21 is fixed to the pressing sleeve 18, one end of the second connecting rod 22 is hinged to the end of the first connecting rod 21, the other end of the second connecting rod 22 is hinged to the third connecting rod 23, the middle part of the third connecting rod 23 is hinged to the supporting seat 5, the other end of the third connecting rod 23 is hinged to the fourth connecting rod 24, and the fourth connecting rod 24 is hinged to the hot melt head 6 at the end away from the third connecting rod 23. When the hot melt head 6 moves downward and contacts the surface of the second workpiece 9 for hot melting, the first spring 17 will be compressed, and the third link 23 in the connecting rod mechanism will swing, thereby driving the fourth link 24 and the first link 21 to rotate, driving the pressing sleeve 18 downward, and the cutter head 19 at the bottom of the pressing sleeve 18 can cut the protruding area of ​​the molding after hot melting, which is convenient for subsequent cleaning of burrs; when the hot melt head 6 moves upward, the first spring 17 will release the elastic force, and the second link 22, the third link 23 and the fourth link 24 in the connecting rod mechanism will move again, so that the pressing sleeve 18 slides relative to the hot melt head 6, so that the annular scraper 20 inside the pressing sleeve 18 cleans the surface of the hot melt head 6. There is a scraping blade edge on the inner side of the annular scraper 20, and the scraping blade edge can be used to effectively scrape and pull the surface of the hot melt head 6.

[0036] The operation process of the present invention is as follows: when the present device is used, the first workpiece 7 can be positioned and placed in the workpiece fixing seat 8, and the second workpiece 9 can be inserted into the assembly groove on the first workpiece 7. Then, the pressing mechanism 4 can be used to drive the heating mechanism 3 downward, so that the two hot melt heads 6 at the bottom of the supporting seat 5 are in contact with the second workpiece 9, and the second workpiece 9 is hot-melted and pressed and fixed to the first workpiece 7; when the hot melt head 6 descends and contacts the surface of the second workpiece 9, the pressing sleeve 18 arranged on the outside of the hot melt head 6 can descend with the hot melt head 6. When the surface of the second workpiece 9 melts into a pool of protruding plastic hot melt area and is fixed, the cutting head 19 at the end of the pressing sleeve 18 can flatten the hot melt area and cut off the edge, so as to facilitate the subsequent deburring operation. When the hot melt head 6 ascends, the pressing sleeve 18 will move from the bottom of the pressing sleeve 18 to the top under the action of the connecting rod mechanism. In this process, the annular scraper 20 in the pressing sleeve 18 can scrape and pull the surface of the hot melt head 6. In order to achieve the purpose of cleaning the hot melt head 6, since the cutter head 19 is threadedly connected to the end of the pressing sleeve 18, the cutter head 19 can be easily disassembled. After the cutter head 19 is disassembled, the burrs and slag cleaned by the annular scraper 20 can be cleaned out from the cavity of the pressing sleeve 18; when the hot melt head 6 descends and contacts the surface of the second workpiece 9 for hot melting, the first spring 17 will be compressed. At this time, the third connecting rod 23 in the connecting rod mechanism will swing, thereby driving the fourth connecting rod 24 and the first connecting rod 21 to rotate, driving the pressing sleeve 18 downward, and the cutter head 19 at the bottom of the pressing sleeve 18 can cut the protruding area of ​​the molding after hot melting, which is convenient for subsequent cleaning of burrs; when the hot melt head 6 goes up, the first spring 17 will release the elastic force. At this time, the second connecting rod 22, the third connecting rod 23 and the fourth connecting rod 24 in the connecting rod mechanism will move again, so that the pressing sleeve 18 slides relative to the hot melt head 6, so that the annular scraper 20 inside the pressing sleeve 18 cleans the surface of the hot melt head 6.

[0037] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A heating and pressing device for plastic parts, characterized in that: The invention comprises a base (1), a support seat (2) is fixed above the base (1), a heating mechanism (3) is vertically slidably arranged above the base (1), a pressing mechanism (4) for driving the heating mechanism (3) to vertically rise and fall is arranged on the support seat (2), the heating mechanism (3) comprises a supporting seat (5) and two hot melt heads (6) arranged at the bottom of the supporting seat (5), a workpiece fixing seat (8) for positioning a first workpiece (7) is fixed above the base (1), the two hot melt heads (6) are arranged on the pressing mechanism (4) with The second workpiece (9) assembled on the first workpiece (7) is fixed to the first workpiece (7) by hot melting; a sliding seat (10) is fixed above the supporting seat (5), and a heat insulation pad (13) is arranged between the sliding seat (10) and the supporting seat (5); a plurality of guide rods (14) are symmetrically fixed above the base (1), and a plurality of guide sleeves (15) matched with the guide rods (14) are fixed on the sliding seat (10); a groove (16) is provided in the supporting seat (5), and a first elastic member (13) is arranged in the groove (16). The first spring (17) is connected between the hot melt head (6) and the bottom of the groove (16); the outer sleeve of the hot melt head (6) is provided with a pressing sleeve (18), the pressing sleeve (18) is vertically slidably connected to the outside of the hot melt head (6), the pressing sleeve (18) is connected to the supporting seat (5) by setting a connecting rod mechanism, the end of the pressing sleeve (18) is threadedly connected with a cutting head (19), and an annular scraper (20) is fixed in the pressing sleeve (18); the connecting rod mechanism includes a first connecting rod (21), a second connecting rod (22 ), a third connecting rod (23), and a fourth connecting rod (24), wherein one end of the first connecting rod (21) is fixed to the pressing sleeve (18), one end of the second connecting rod (22) is hinged to the end of the first connecting rod (21), the other end of the second connecting rod (22) is hinged to the third connecting rod (23), the middle part of the third connecting rod (23) is hinged to the supporting seat (5), the other end of the third connecting rod (23) is hinged to the fourth connecting rod (24), and the fourth connecting rod (24) is hinged to the hot melt head (6) at one end away from the third connecting rod (23).

2. A heating and pressing device for plastic parts according to claim 1, characterized in that: The inner side of the annular scraper (20) is provided with a scraping edge.

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