A secondary mold opening structure of mold

Abstract

The utility model discloses a secondary mold opening structure in the field of mold opening technology, aiming to solve the problem that the existing mold opening products are adhered to the slider and cannot be demolded smoothly. It includes a slider seat, an insert seat, a first stroke limiter and a male mold core arranged on the male mold plate; the slider seat and the insert seat are slidably connected to the male mold plate; in the mold closing state, the rubber-coated end of the molding insert arranged on the slider seat is inserted into the injection cavity in the male mold core through the insert seat; the first spring is compressed and arranged in the first limit groove cooperatedly opened between the slider seat and the insert seat; the head of the first stroke limiter is placed in the stroke groove opened on the right end face of the insert seat and contacts the male mold core, and the tail passes through the insert seat and the first spring in turn and is screwed on the slider seat; the displacement distance of the head of the first stroke limiter relative to the stroke groove is not less than the length of the rubber-coated end; the application is suitable for mold opening to ensure the quality and effect of product demolding.

Description

Technical Field

[0001] The utility model relates to a secondary mold opening structure for a mold, and belongs to the technical field of mold opening. Background Art

[0002] Injection molding products are widely used in life. Injection molding products are produced by developing molds and injection molding. Due to the diversity of injection molding products, some conventional undercut structures on the products are molded by designing slider mechanisms. For the slider molding parts, which are completely wrapped by the plastic product, the traditional slider structure has the problem of slider demoulding, and even the product sticking to the slider and cannot be smoothly produced. In view of this problem, the mold development requires the product to increase / increase the demoulding angle for this feature to prevent the demoulding / sticking problem of the slider. However, for some special products such as automotive actuator connectors, the demoulding angle cannot be increased due to the application field and requirements of the product. The product usually has no demoulding angle or a very small demoulding angle. This is common in the automotive industry. Due to the requirements of sealing leakage and plug-in assembly with the counterpart in the functional area, the demoulding angle is absolutely not allowed to be increased. This is a great risk of demoulding / sticking when using the traditional slider mechanism.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a mold secondary opening structure which is simple in structure and easy to install. The secondary mold separation method formed by the structure can avoid the slider sticking to the mold during the product demoulding process, which affects the product experimental effect or affects the product production control.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] The utility model provides a secondary mold opening structure of a mold, comprising a slider seat, an insert seat, a first stroke limiter and a male mold core arranged on a male mold plate; the slider seat and the insert seat are slidably connected to the male mold plate;

[0007] In the mold closing state, the rubber-coated end of the molding insert arranged on the slider seat is inserted into the injection cavity in the male mold core through the insert seat; the first spring is compressed and arranged in the first limiting groove formed between the slider seat and the insert seat; the head of the first stroke limiting member is placed in the stroke groove formed on the right end face of the insert seat and contacts the male mold core, and the tail passes through the insert seat and the first spring in sequence and is screwed to the slider seat; the displacement distance of the head of the first stroke limiting member relative to the stroke groove is not less than the length of the rubber-coated end;

[0008] When the mold is opened once, the slider seat drives the first stroke limiter and the molding insert to move to the left relative to the insert seat, and the elastic force of the first spring causes the insert seat to continuously abut against the male mold core; when the head of the first stroke limiter moves to the left end of the stroke groove, the rubber-coated end exits the cavity, driving the slider seat to continue to move to the left, so that the insert seat is away from the male mold core to complete the second mold opening.

[0009] Furthermore, a first guide groove is provided on the insert seat; a second guide groove is provided on the slider seat; both ends of the first guide groove are respectively connected to the travel groove and the first limit groove, and the height of the first guide groove is lower than that of the travel groove; the second guide groove is connected to the first limit groove.

[0010] Furthermore, the first travel limiter is a shoulder screw; the shoulder screw includes a screw connected between a screw head end and a threaded end; the threaded end sequentially passes through the travel groove, the first guide groove, the first spring and the second guide groove and is screwed into the slider seat, so that the screw head end is placed in the travel groove.

[0011] Furthermore, it also includes a second stroke limiter; the second stroke limiter is elastically arranged on the male template; the limiting part of the second stroke limiter in the mold closing state cooperates with the second limiting groove on the slider seat to limit up and down, and abuts against the entry seat; when the mold is opened once, the slider seat moves to the left so that the second stroke limiter is elastically contracted under force, and the limiting part can always limit the entry seat until the head of the first stroke limiter moves to the left end of the stroke groove to release the limit.

[0012] Furthermore, the second stroke limiter comprises a second spring and a limiter block; the limiter block is fixed in a third limiter groove provided on the male mold core by the second spring; the upper end surface of the limiter block is provided with a front convex section, a middle concave section and a rear convex section from left to right, and the second limiter groove corresponding to the upper and lower limits is provided with a front concave section, a middle convex section and a rear concave section from left to right; the heights of the front convex section and the rear convex section are equal; the limiter block in the mold closing state is elastically acted upon by the second spring, the upper end surface is fitted in the second limiter groove, and the rear convex section abuts against the left end surface of the insert seat for limiting;

[0013] The travel length of the head of the first travel limiter moving from the right end to the left end along the travel groove is equal to the distance from the lowest point of the left end of the middle convex section to the highest point of the right end of the front convex section.

[0014] Furthermore, a lower assembly groove is extended downwardly in the third limiting groove, and an upper assembly groove is opened at the bottom of the corresponding limiting block; the bottom end of the second spring is fixed in the lower assembly groove, and the top end is fixed in the upper assembly groove.

[0015] Furthermore, an entry channel is provided on the entry seat; the rubber-coated end of the molding entry enters the mold cavity through the entry channel.

[0016] Furthermore, the tail end of the molding insert is placed on the slider seat and fixed by a positioning pin.

[0017] Furthermore, it also includes a driving mechanism; the driving mechanism is arranged on one side of the male template, driving the slider seat to reciprocate left and right in a straight line.

[0018] Furthermore, the driving mechanism is an oil cylinder; the piston rod of the oil cylinder is fixedly connected to the slider seat.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a secondary mold opening structure. When the mold is opened for the first time, the driving slider seat drives the first stroke limiter and the molding insert to move to the left relative to the insert seat away from the male mold core. The compressed first spring causes the insert seat to continuously abut against the male mold core under the action of the elastic force. The abutment effect of the insert seat can make the rubber-coated end exit the mold cavity smoothly, and can overcome the adhesion between the rubber-coated end and the injection molding part of the product, effectively avoiding the stretching of the injection molded product caused by the exit, so that the quality of the injection molded product is guaranteed. When the mold is opened for the second time, the slider seat is continued to be driven to move to the left, and the head of the first stroke limiter drives the insert seat to also move away from the male mold core and the product, avoiding space occupation, making it convenient for manual or mechanical hands to take the molded product, and also improving the efficiency of manual or mechanical hands to put the next product to be injection molded into the mold cavity.

[0021] The utility model is also provided with a second stroke limiter, which is elastically arranged on the male mold plate; the limiter part of the second stroke limiter in the mold closing state and the second limiter groove on the slider seat cooperate with each other to limit up and down, and abut against the sub-seat; when the slider seat is driven to move left after one mold opening, the second stroke limiter is elastically contracted under force, but the limiter part can always limit the sub-seat until the head of the first stroke limiter moves to the left end of the stroke groove, and the limit on the sub-seat is released. The second stroke limiter can limit the sub-seat during one mold opening process, avoiding the repeated instantaneous driving of the slider seat in actual work, which causes excessive fatigue of the first spring, and fails to generate elastic force on the sub-block in time, resulting in the separation of the sub-seat from the male mold core. The design of the second stroke limiter is added to ensure that when the mold is opened once, the second stroke limiter limits the sub-seat from moving left, so that the sub-seat and the male mold core are completely close to each other during this process, ensuring the quality and effect of demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a secondary mold opening structure provided by the utility model;

[0023] Figure 2 It is a schematic diagram of part of the structure in the mold closing state;

[0024] Figure 3 It is a schematic diagram of the partial structure of a one-time mold opening;

[0025] Figure 4 It is a partial structural schematic diagram of the secondary mold opening;

[0026] Figure 5 is a schematic diagram of the matching structure of the second limiting groove and the limiting block;

[0027] In the figure: 1, slider seat; 2, insert seat; 3, first stroke limiter; 4, male mold plate; 5, male mold core; 6, forming insert; 7, first spring; 8, first limiter groove; 9, stroke groove; 10, first guide groove; 11, second guide groove; 12, second limiter groove; 13, second stroke limiter; 14, second spring; 15, limiter block; 16, third limiter groove; 17, lower assembly groove; 18, upper assembly groove; 19, insert channel; 20, positioning pin; 21, driving mechanism;

[0028] 121, front concave section; 122, middle convex section; 123, rear concave section; A, lowest point at the left end;

[0029] 151, convex section; 152, concave section; 153, convex section; B, highest point at the right end; DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] See also Figures 1 to 5 The present embodiment provides a secondary mold opening structure of a mold, comprising a slider seat 1, an insert seat 2, a first stroke limiter 3, a male mold plate 4 and a male mold core 5. The male mold core 5 is arranged on the male mold plate 4, and the slider seat 1 and the insert seat 2 are slidably mounted on the male mold plate 4.

[0034] Specifically, Figure 1 and Figure 2As shown, the right end of the insert seat 2 in the mold closing state is against the male mold core 5, and the left end of the insert seat 2 is against the slider seat 1. The tail end of the molding insert 6 is fixed on the slider seat 1, and the rubber-coated end of the molding insert 6 passes through the insert seat 2 and docks in the injection cavity in the male mold core 5 to contact the pre-loaded product. There is a travel gap between the rubber-coated end and the injection cavity, and the injection material is poured in the gap, and after cooling, it forms an integrated structure with the product in the cavity. The first limiting groove 8 is provided between the slider seat 1 and the insert seat 2, and the right end face of the insert seat 2 is provided with a travel groove 9. The first spring 7 in the mold closing state is installed in the first limiting groove 8 in a compressed state, and the head of the first travel limiting member 3 is arranged on the right end face of the travel groove 9, and contacts and abuts against the male mold core 5. The tail of the first travel limiting member 3 passes through the insert seat 2 and the first spring 7 in sequence and is fixedly connected to the slider seat 1. Among them, the displacement distance of the head of the first stroke limiter 3 relative to the stroke groove 9 should be set to be no less than the length of the rubber-coated end, which can ensure that after the slider seat drives the molding insert 6 to completely exit the male mold core 5 cavity, the pulling force is applied to the insert seat 2, effectively ensuring that the molding insert 6 safely exits the injection cavity and avoiding damage to the injection molded parts in the cavity.

[0035] Combination Figure 3 , one-time mold opening: driving the slider seat 1 to drive the first stroke limiter 3 and the molding insert 6 to move to the left relative to the insert seat 2, the elastic force of the first spring 7 can push the insert seat 2 to continuously abut against the male mold core 5, when the head of the first stroke limiter 3 driven by the slider seat 1 moves to the left end of the stroke groove 9, the running distance makes the rubber-coated end of the molding insert 6 exit the cavity.

[0036] Combined with Figure 4 , Secondary mold opening: After the primary mold opening, the slider seat 1 is continued to be driven to move to the left, and the head of the first stroke limiter 3 pulls the insert seat 2, so that the insert seat 2 is also away from the male mold core 5. The purpose of the primary mold opening is to enable the insert seat 2 to limit the completed injection molded product in the cavity of the male mold core 5. The abutment effect of the insert seat 2 can not only make the rubber-coated end exit the cavity smoothly, but also overcome the situation when the rubber-coated end is adhered to the injection molding part of the product, and avoid the stretching of the injection molded product when the rubber-coated end of the molding insert 6 exits, so that the quality of the injection molded product is guaranteed. The secondary mold opening allows the insert seat 2 to be away from the male mold core 5 and the product, avoiding space occupation, making it convenient for manual or robotic arms to take the molded products, and also improving the efficiency of manual or robotic arms to put the next product to be injection molded into the cavity.

[0037] Optionally, a first guide groove 10 is provided on the insert seat 2, and a second guide groove 11 is provided on the slider seat 1. The first guide groove 10 is connected between the first limit groove 8 and the travel groove 9, so that a connection relationship is formed between the first limit groove 8 and the travel groove 9, and the second guide groove 11 is connected to the first limit groove 8. The height of the first guide groove 10 is set smaller than the height of the travel groove 9, so that the head of the first travel limiter 3 is limited in the travel groove 9.

[0038] The first travel limiter 3 can use a shoulder screw; the shoulder screw includes a screw head end, a threaded end and a screw rod. One end of the screw rod is connected to the screw head end, and the other end is connected to the screw rod end. The threaded end passes through the travel groove 9, the first guide groove 10, the first spring 7 and the second guide groove 11 in sequence and then is screwed into the slider seat 1, the screw head is placed in the travel groove 9, and the screw rod is placed in the first guide groove 10, the first limit groove 8 and the second guide groove 11.

[0039] In some embodiments, see Figures 1 to 5 , the secondary mold opening structure of the mold also includes a second stroke limiter 13. The second stroke limiter 13 is elastically mounted on the male mold plate 4. The corresponding slider seat 1 is provided with a second limit groove 12. The limit part of the second stroke limiter 13 and the second limit groove 12 in the mold closing state cooperate with each other for upper and lower limits, and the limit part abuts against the entrant seat 2. When the mold is opened once, the slider seat 1 moves to the left, and the second limit groove 12 can move to the left along the limit part, so that the second stroke limiter 13 is continuously elastically contracted under force, and the entrant seat 2 can always be limited even when the limit part is continuously pressed down, until the head of the first stroke limiter 3 moves to the left end of the stroke groove 9, the limit part is completely pressed down, and the entrant seat 2 is not abutted and limited. In the actual product mold opening process, the entire process of driving the slider seat to move left is very fast. During the instantaneous movement, the first spring 7 may be overly fatigued due to repeated expansion and contraction, and cannot apply elastic force to the insert seat 2 in time, resulting in the insert seat 2 being unable to restrict the rubber-coated end of the molded insert 6 during the withdrawal process, affecting product quality. The purpose of this design is to assist the first spring 7 to limit the insert seat 2 during the one-time mold opening process, ensure that the insert seat 2 and the male mold core 5 are completely close to each other during this process, avoid the injection molded part from sticking to the rubber-coated end of the molded insert 6 and stretching it, and ensure the quality and effect of demolding.

[0040] Specifically, the second travel limiter 13 includes a second spring 14 and a limit block 15. A third limit groove 16 is provided on the male mold core 5. One end of the second spring 14 is fixed to the bottom of the limit block 15, and the other end is fixed in the third limit groove 16 through the second spring 14. The third limit groove 16 guides the limit block 15 to prevent the limit block 15 from moving left and right when the slider seat 1 moves left and right. Figure 5, the upper end surface of the limit block 15 is provided with a front convex section 151, a middle concave section 152 and a rear convex section 153 from left to right. The second limit groove 12 corresponding to the upper and lower limits is provided with a front concave section 121, a middle convex section 122 and a rear concave section 123 from left to right. When set, the height of the front convex section 151 is equal to the height of the rear convex section 153. In the mold closing state, the limit block 15 is elastically acted upon by the second spring 14 so that the upper end surface of the limit block 15 is completely fitted in the second limit groove 12, and the rear convex section 153 abuts against the left end surface of the insert seat 2, limiting the insert seat 2 from moving to the left.

[0041] The length of the stroke of the head of the first stroke limiter 3 moving along the right end of the stroke groove 9 to the left end of the stroke groove 9 is equal to the distance from the lowest point A of the left end of the middle convex section 122 to the highest point B of the right end of the front convex section 151. When the lowest point A of the left end of the middle convex section 122 moves to the highest point B of the right end of the front convex section 151, it proves that the limiter 15 is completely compressed and withdrawn from the second limiter groove 12, and at the same time, the end face of the rear convex section 153 is squeezed to be in the same horizontal plane as the bottom end face of the insert seat 2. This arrangement allows the slider seat 1 to move to the limiter 15 and be completely compressed and contracted, and the rear convex section 15 moves downward, and no longer abuts against the left end face of the insert seat 2 to limit the position. At this time, the rubber-coated end of the molded insert 6 completely withdraws from the cavity of the male mold core 5, ensuring the demolding quality of the product.

[0042] According to actual needs, for the design of the molded end of the mold insert 6 with a demoulding angle, the distance from the lowest point A at the left end of the middle convex section 122 to the highest point B at the right end of the front convex section 151 can be less than the stroke length of the head of the first stroke limiter 3 moving along the right end of the stroke groove 9 to the left end of the stroke groove 9. That is, the stroke length of the head of the first stroke limiter 3 moving along the right end of the stroke groove 9 to the left end of the stroke groove 9 satisfies the difference between the overall length of the rubber-encapsulated end and the length designed for the demoulding angle of the rubber-encapsulated end.

[0043] Optionally, a lower assembly groove 17 is extended downwardly in the third limit groove 16, and an upper assembly groove 18 is provided at the bottom of the corresponding limit block 15. The bottom end of the second spring 14 is fixedly connected in the lower assembly groove 17, and the top end is fixedly connected in the upper assembly groove 18. The second spring 14 can be limited between the upper assembly groove 18 and the lower assembly groove 17, and the upper assembly groove 18 and the lower assembly groove 17 play a good guiding role. The left and right movement of the slider seat 1 generates a leftward or rightward thrust on the limit block 15, and the upper assembly groove 18 and the lower assembly groove 17 can limit the left and right deviation of the second spring 14, thereby ensuring the high efficiency and accuracy of product demoulding.

[0044] Yes, the insert seat 2 is provided with an insert channel 19. During assembly, the rubber-coated end of the mold insert 6 enters the mold cavity of the male mold core 5 through the insert channel 19, which guides the mold insert 6 and ensures that it is accurately docked in the mold cavity. The tail end of the mold insert 6 is inserted into the slider seat 1 and fixed by the positioning pin 20.

[0045] Optionally, the secondary mold opening structure of the mold further includes a driving mechanism 21. The driving mechanism 21 is installed on one side of the male mold plate 4 and is used to drive the slider seat to move back and forth linearly. The driving mechanism 21 uses a cylinder. The cylinder is fixed on the one side of the male mold plate 4, and the piston rod of the cylinder is fixedly connected to the slider seat 1.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A secondary mold opening structure, characterized in that: It includes a slider seat, an insert seat, a first stroke limiter and a male mold core arranged on a male mold plate; the slider seat and the insert seat are slidably connected to the male mold plate; In the mold closing state, the rubber-coated end of the molding insert arranged on the slider seat is inserted into the injection cavity in the male mold core through the insert seat; the first spring is compressed and arranged in the first limiting groove formed between the slider seat and the insert seat; the head of the first stroke limiting member is placed in the stroke groove formed on the right end face of the insert seat and contacts the male mold core, and the tail passes through the insert seat and the first spring in sequence and is screwed to the slider seat; the displacement distance of the head of the first stroke limiting member relative to the stroke groove is not less than the length of the rubber-coated end; When the mold is opened once, the slider seat drives the first stroke limiter and the molding insert to move to the left relative to the insert seat, and the elastic force of the first spring causes the insert seat to continuously abut against the male mold core; when the head of the first stroke limiter moves to the left end of the stroke groove, the rubber-coated end exits the cavity, driving the slider seat to continue to move to the left, so that the insert seat is away from the male mold core to complete the second mold opening.

2. The secondary mold opening structure of the mold according to claim 1, characterized in that: A first guide groove is provided on the insert seat; a second guide groove is provided on the slider seat; both ends of the first guide groove are respectively connected with the travel groove and the first limit groove, and the height of the first guide groove is lower than that of the travel groove; the second guide groove is connected with the first limit groove.

3. The secondary mold opening structure of the mold according to claim 2 is characterized in that: The first travel limiter is a shoulder screw; the shoulder screw includes a screw rod connected between a screw head end and a threaded end; the threaded end sequentially passes through the travel groove, the first guide groove, the first spring and the second guide groove and is screwed into the slider seat, so that the screw head end is placed in the travel groove.

4. The secondary mold opening structure of the mold according to claim 1 is characterized in that: It also includes a second stroke limiter; the second stroke limiter is elastically arranged on the male template; the limiting part of the second stroke limiter in the mold closing state cooperates with the second limiting groove on the slider seat to limit up and down, and abuts against the entry seat; when the mold is opened once, the slider seat moves left so that the second stroke limiter is elastically contracted under force, and the limiting part can always limit the entry seat until the head of the first stroke limiter moves to the left end of the stroke groove to release the limit.

5. The secondary mold opening structure of the mold according to claim 4 is characterized in that: The second stroke limiter comprises a second spring and a limit block; the limit block is fixed in a third limit groove provided on the male mold core by the second spring; the upper end surface of the limit block is provided with a front convex section, a middle concave section and a rear convex section from left to right, and the second limit groove corresponding to the upper and lower limits is provided with a front concave section, a middle convex section and a rear concave section from left to right; the heights of the front convex section and the rear convex section are equal; the limit block in the mold closing state is elastically acted upon by the second spring, the upper end surface is fitted in the second limit groove, and the rear convex section abuts against the left end surface of the insert seat for limiting; The travel length of the head of the first travel limiter moving from the right end to the left end along the travel groove is equal to the distance from the lowest point of the left end of the middle convex section to the highest point of the right end of the front convex section.

6. The secondary mold opening structure of the mold according to claim 5, characterized in that: A lower assembly groove is extended downwardly in the third limiting groove, and an upper assembly groove is opened corresponding to the bottom of the limiting block; the bottom end of the second spring is fixed in the lower assembly groove, and the top end is fixed in the upper assembly groove.

7. The secondary mold opening structure of the mold according to claim 1 is characterized in that: The insert seat is provided with an insert channel; the rubber-coated end of the molding insert enters the mold cavity through the insert channel.

8. The secondary mold opening structure of the mold according to claim 1 or 7, characterized in that: The tail end of the molding insert is placed on the slider seat and fixed by a positioning pin.

9. The secondary mold opening structure of the mold according to claim 1, characterized in that: It also includes a driving mechanism; the driving mechanism is arranged on one side of the male template and drives the slider seat to move back and forth linearly left and right.

10. The secondary mold opening structure of the mold according to claim 9, characterized in that: The driving mechanism is an oil cylinder; the piston rod of the oil cylinder is fixedly connected to the sliding block seat.

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